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, inp->fibnum);
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.strmout[i].state = SCTP_STREAM_OPENING;
3656 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3661 case SCTP_DSTADDRV4:
3662 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3666 memset(&sin, 0, sizeof(struct sockaddr_in));
3667 sin.sin_family = AF_INET;
3668 sin.sin_len = sizeof(struct sockaddr_in);
3669 sin.sin_port = stcb->rport;
3670 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3671 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3672 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3673 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3677 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3678 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3685 case SCTP_DSTADDRV6:
3686 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3690 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3691 sin6.sin6_family = AF_INET6;
3692 sin6.sin6_len = sizeof(struct sockaddr_in6);
3693 sin6.sin6_port = stcb->rport;
3694 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3695 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3696 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3701 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3702 in6_sin6_2_sin(&sin, &sin6);
3703 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3704 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3705 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3709 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3710 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3716 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
3717 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3727 at += CMSG_ALIGN(cmh.cmsg_len);
3732 static struct sctp_tcb *
3733 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3735 struct mbuf *control,
3736 struct sctp_nets **net_p,
3741 struct sctp_tcb *stcb;
3742 struct sockaddr *addr;
3745 struct sockaddr_in sin;
3749 struct sockaddr_in6 sin6;
3753 tlen = SCTP_BUF_LEN(control);
3756 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3757 /* There is not enough room for one more. */
3761 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3762 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3763 /* We dont't have a complete CMSG header. */
3767 if (((int)cmh.cmsg_len + at) > tlen) {
3768 /* We don't have the complete CMSG. */
3772 if (cmh.cmsg_level == IPPROTO_SCTP) {
3773 switch (cmh.cmsg_type) {
3775 case SCTP_DSTADDRV4:
3776 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3780 memset(&sin, 0, sizeof(struct sockaddr_in));
3781 sin.sin_family = AF_INET;
3782 sin.sin_len = sizeof(struct sockaddr_in);
3783 sin.sin_port = port;
3784 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3785 addr = (struct sockaddr *)&sin;
3789 case SCTP_DSTADDRV6:
3790 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3794 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3795 sin6.sin6_family = AF_INET6;
3796 sin6.sin6_len = sizeof(struct sockaddr_in6);
3797 sin6.sin6_port = port;
3798 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3800 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3801 in6_sin6_2_sin(&sin, &sin6);
3802 addr = (struct sockaddr *)&sin;
3805 addr = (struct sockaddr *)&sin6;
3813 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3819 at += CMSG_ALIGN(cmh.cmsg_len);
3824 static struct mbuf *
3825 sctp_add_cookie(struct mbuf *init, int init_offset,
3826 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3828 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3829 struct sctp_state_cookie *stc;
3830 struct sctp_paramhdr *ph;
3835 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3836 sizeof(struct sctp_paramhdr)), 0,
3837 M_NOWAIT, 1, MT_DATA);
3841 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3842 if (copy_init == NULL) {
3846 #ifdef SCTP_MBUF_LOGGING
3847 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3848 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3851 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3853 if (copy_initack == NULL) {
3855 sctp_m_freem(copy_init);
3858 #ifdef SCTP_MBUF_LOGGING
3859 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3860 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3863 /* easy side we just drop it on the end */
3864 ph = mtod(mret, struct sctp_paramhdr *);
3865 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3866 sizeof(struct sctp_paramhdr);
3867 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3868 sizeof(struct sctp_paramhdr));
3869 ph->param_type = htons(SCTP_STATE_COOKIE);
3870 ph->param_length = 0; /* fill in at the end */
3871 /* Fill in the stc cookie data */
3872 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3874 /* tack the INIT and then the INIT-ACK onto the chain */
3876 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3877 cookie_sz += SCTP_BUF_LEN(m_at);
3878 if (SCTP_BUF_NEXT(m_at) == NULL) {
3879 SCTP_BUF_NEXT(m_at) = copy_init;
3883 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3884 cookie_sz += SCTP_BUF_LEN(m_at);
3885 if (SCTP_BUF_NEXT(m_at) == NULL) {
3886 SCTP_BUF_NEXT(m_at) = copy_initack;
3890 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3891 cookie_sz += SCTP_BUF_LEN(m_at);
3892 if (SCTP_BUF_NEXT(m_at) == NULL) {
3896 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3898 /* no space, so free the entire chain */
3902 SCTP_BUF_LEN(sig) = 0;
3903 SCTP_BUF_NEXT(m_at) = sig;
3905 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3906 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3908 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3909 cookie_sz += SCTP_SIGNATURE_SIZE;
3910 ph->param_length = htons(cookie_sz);
3916 sctp_get_ect(struct sctp_tcb *stcb)
3918 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3919 return (SCTP_ECT0_BIT);
3925 #if defined(INET) || defined(INET6)
3927 sctp_handle_no_route(struct sctp_tcb *stcb,
3928 struct sctp_nets *net,
3931 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3934 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3935 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3936 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3937 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3938 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3939 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3943 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3944 net->dest_state &= ~SCTP_ADDR_PF;
3948 if (net == stcb->asoc.primary_destination) {
3949 /* need a new primary */
3950 struct sctp_nets *alt;
3952 alt = sctp_find_alternate_net(stcb, net, 0);
3954 if (stcb->asoc.alternate) {
3955 sctp_free_remote_addr(stcb->asoc.alternate);
3957 stcb->asoc.alternate = alt;
3958 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3959 if (net->ro._s_addr) {
3960 sctp_free_ifa(net->ro._s_addr);
3961 net->ro._s_addr = NULL;
3963 net->src_addr_selected = 0;
3973 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3974 struct sctp_tcb *stcb, /* may be NULL */
3975 struct sctp_nets *net,
3976 struct sockaddr *to,
3978 uint32_t auth_offset,
3979 struct sctp_auth_chunk *auth,
3980 uint16_t auth_keyid,
3981 int nofragment_flag,
3988 union sctp_sockstore *over_addr,
3989 uint8_t mflowtype, uint32_t mflowid,
3990 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3991 int so_locked SCTP_UNUSED
3996 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3999 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
4000 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
4001 * - fill in the HMAC digest of any AUTH chunk in the packet.
4002 * - calculate and fill in the SCTP checksum.
4003 * - prepend an IP address header.
4004 * - if boundall use INADDR_ANY.
4005 * - if boundspecific do source address selection.
4006 * - set fragmentation option for ipV4.
4007 * - On return from IP output, check/adjust mtu size of output
4008 * interface and smallest_mtu size as well.
4010 /* Will need ifdefs around this */
4012 struct sctphdr *sctphdr;
4016 #if defined(INET) || defined(INET6)
4020 #if defined(INET) || defined(INET6)
4022 sctp_route_t *ro = NULL;
4023 struct udphdr *udp = NULL;
4028 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4029 struct socket *so = NULL;
4033 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4034 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4038 #if defined(INET) || defined(INET6)
4040 vrf_id = stcb->asoc.vrf_id;
4042 vrf_id = inp->def_vrf_id;
4045 /* fill in the HMAC digest for any AUTH chunk in the packet */
4046 if ((auth != NULL) && (stcb != NULL)) {
4047 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4050 tos_value = net->dscp;
4052 tos_value = stcb->asoc.default_dscp;
4054 tos_value = inp->sctp_ep.default_dscp;
4057 switch (to->sa_family) {
4061 struct ip *ip = NULL;
4062 sctp_route_t iproute;
4065 len = SCTP_MIN_V4_OVERHEAD;
4067 len += sizeof(struct udphdr);
4069 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4072 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4075 SCTP_ALIGN_TO_END(newm, len);
4076 SCTP_BUF_LEN(newm) = len;
4077 SCTP_BUF_NEXT(newm) = m;
4080 m->m_pkthdr.flowid = net->flowid;
4081 M_HASHTYPE_SET(m, net->flowtype);
4083 m->m_pkthdr.flowid = mflowid;
4084 M_HASHTYPE_SET(m, mflowtype);
4086 packet_length = sctp_calculate_len(m);
4087 ip = mtod(m, struct ip *);
4088 ip->ip_v = IPVERSION;
4089 ip->ip_hl = (sizeof(struct ip) >> 2);
4090 if (tos_value == 0) {
4092 * This means especially, that it is not set
4093 * at the SCTP layer. So use the value from
4096 tos_value = inp->ip_inp.inp.inp_ip_tos;
4100 tos_value |= sctp_get_ect(stcb);
4102 if ((nofragment_flag) && (port == 0)) {
4103 ip->ip_off = htons(IP_DF);
4105 ip->ip_off = htons(0);
4107 /* FreeBSD has a function for ip_id's */
4108 ip->ip_id = ip_newid();
4110 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4111 ip->ip_len = htons(packet_length);
4112 ip->ip_tos = tos_value;
4114 ip->ip_p = IPPROTO_UDP;
4116 ip->ip_p = IPPROTO_SCTP;
4121 memset(&iproute, 0, sizeof(iproute));
4122 memcpy(&ro->ro_dst, to, to->sa_len);
4124 ro = (sctp_route_t *) & net->ro;
4126 /* Now the address selection part */
4127 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4129 /* call the routine to select the src address */
4130 if (net && out_of_asoc_ok == 0) {
4131 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4132 sctp_free_ifa(net->ro._s_addr);
4133 net->ro._s_addr = NULL;
4134 net->src_addr_selected = 0;
4140 if (net->src_addr_selected == 0) {
4141 /* Cache the source address */
4142 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4145 net->src_addr_selected = 1;
4147 if (net->ro._s_addr == NULL) {
4148 /* No route to host */
4149 net->src_addr_selected = 0;
4150 sctp_handle_no_route(stcb, net, so_locked);
4151 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4153 return (EHOSTUNREACH);
4155 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4157 if (over_addr == NULL) {
4158 struct sctp_ifa *_lsrc;
4160 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4164 if (_lsrc == NULL) {
4165 sctp_handle_no_route(stcb, net, so_locked);
4166 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4168 return (EHOSTUNREACH);
4170 ip->ip_src = _lsrc->address.sin.sin_addr;
4171 sctp_free_ifa(_lsrc);
4173 ip->ip_src = over_addr->sin.sin_addr;
4174 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4178 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4179 sctp_handle_no_route(stcb, net, so_locked);
4180 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4182 return (EHOSTUNREACH);
4184 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4185 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4186 udp->uh_dport = port;
4187 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4189 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4193 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4195 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4198 sctphdr->src_port = src_port;
4199 sctphdr->dest_port = dest_port;
4200 sctphdr->v_tag = v_tag;
4201 sctphdr->checksum = 0;
4204 * If source address selection fails and we find no
4205 * route then the ip_output should fail as well with
4206 * a NO_ROUTE_TO_HOST type error. We probably should
4207 * catch that somewhere and abort the association
4208 * right away (assuming this is an INIT being sent).
4210 if (ro->ro_rt == NULL) {
4212 * src addr selection failed to find a route
4213 * (or valid source addr), so we can't get
4214 * there from here (yet)!
4216 sctp_handle_no_route(stcb, net, so_locked);
4217 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4219 return (EHOSTUNREACH);
4221 if (ro != &iproute) {
4222 memcpy(&iproute, ro, sizeof(*ro));
4224 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4225 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4226 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4227 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4228 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4231 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4232 /* failed to prepend data, give up */
4233 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4237 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4239 #if defined(SCTP_WITH_NO_CSUM)
4240 SCTP_STAT_INCR(sctps_sendnocrc);
4242 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4243 SCTP_STAT_INCR(sctps_sendswcrc);
4246 SCTP_ENABLE_UDP_CSUM(o_pak);
4249 #if defined(SCTP_WITH_NO_CSUM)
4250 SCTP_STAT_INCR(sctps_sendnocrc);
4252 m->m_pkthdr.csum_flags = CSUM_SCTP;
4253 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4254 SCTP_STAT_INCR(sctps_sendhwcrc);
4257 #ifdef SCTP_PACKET_LOGGING
4258 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4259 sctp_packet_log(o_pak);
4261 /* send it out. table id is taken from stcb */
4262 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4263 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4264 so = SCTP_INP_SO(inp);
4265 SCTP_SOCKET_UNLOCK(so, 0);
4268 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4269 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4270 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4271 atomic_add_int(&stcb->asoc.refcnt, 1);
4272 SCTP_TCB_UNLOCK(stcb);
4273 SCTP_SOCKET_LOCK(so, 0);
4274 SCTP_TCB_LOCK(stcb);
4275 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4278 SCTP_STAT_INCR(sctps_sendpackets);
4279 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4281 SCTP_STAT_INCR(sctps_senderrors);
4283 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4285 /* free tempy routes */
4289 * PMTU check versus smallest asoc MTU goes
4292 if ((ro->ro_rt != NULL) &&
4293 (net->ro._s_addr)) {
4296 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4298 mtu -= sizeof(struct udphdr);
4300 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4301 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4304 } else if (ro->ro_rt == NULL) {
4305 /* route was freed */
4306 if (net->ro._s_addr &&
4307 net->src_addr_selected) {
4308 sctp_free_ifa(net->ro._s_addr);
4309 net->ro._s_addr = NULL;
4311 net->src_addr_selected = 0;
4320 uint32_t flowlabel, flowinfo;
4321 struct ip6_hdr *ip6h;
4322 struct route_in6 ip6route;
4324 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4326 struct sockaddr_in6 lsa6_storage;
4328 u_short prev_port = 0;
4332 flowlabel = net->flowlabel;
4334 flowlabel = stcb->asoc.default_flowlabel;
4336 flowlabel = inp->sctp_ep.default_flowlabel;
4338 if (flowlabel == 0) {
4340 * This means especially, that it is not set
4341 * at the SCTP layer. So use the value from
4344 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4346 flowlabel &= 0x000fffff;
4347 len = SCTP_MIN_OVERHEAD;
4349 len += sizeof(struct udphdr);
4351 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4354 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4357 SCTP_ALIGN_TO_END(newm, len);
4358 SCTP_BUF_LEN(newm) = len;
4359 SCTP_BUF_NEXT(newm) = m;
4362 m->m_pkthdr.flowid = net->flowid;
4363 M_HASHTYPE_SET(m, net->flowtype);
4365 m->m_pkthdr.flowid = mflowid;
4366 M_HASHTYPE_SET(m, mflowtype);
4368 packet_length = sctp_calculate_len(m);
4370 ip6h = mtod(m, struct ip6_hdr *);
4371 /* protect *sin6 from overwrite */
4372 sin6 = (struct sockaddr_in6 *)to;
4376 /* KAME hack: embed scopeid */
4377 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4378 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4382 memset(&ip6route, 0, sizeof(ip6route));
4383 ro = (sctp_route_t *) & ip6route;
4384 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4386 ro = (sctp_route_t *) & net->ro;
4389 * We assume here that inp_flow is in host byte
4390 * order within the TCB!
4392 if (tos_value == 0) {
4394 * This means especially, that it is not set
4395 * at the SCTP layer. So use the value from
4398 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4402 tos_value |= sctp_get_ect(stcb);
4406 flowinfo |= tos_value;
4408 flowinfo |= flowlabel;
4409 ip6h->ip6_flow = htonl(flowinfo);
4411 ip6h->ip6_nxt = IPPROTO_UDP;
4413 ip6h->ip6_nxt = IPPROTO_SCTP;
4415 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4416 ip6h->ip6_dst = sin6->sin6_addr;
4419 * Add SRC address selection here: we can only reuse
4420 * to a limited degree the kame src-addr-sel, since
4421 * we can try their selection but it may not be
4424 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4425 lsa6_tmp.sin6_family = AF_INET6;
4426 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4428 if (net && out_of_asoc_ok == 0) {
4429 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4430 sctp_free_ifa(net->ro._s_addr);
4431 net->ro._s_addr = NULL;
4432 net->src_addr_selected = 0;
4438 if (net->src_addr_selected == 0) {
4439 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4440 /* KAME hack: embed scopeid */
4441 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4442 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4445 /* Cache the source address */
4446 net->ro._s_addr = sctp_source_address_selection(inp,
4452 (void)sa6_recoverscope(sin6);
4453 net->src_addr_selected = 1;
4455 if (net->ro._s_addr == NULL) {
4456 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4457 net->src_addr_selected = 0;
4458 sctp_handle_no_route(stcb, net, so_locked);
4459 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4461 return (EHOSTUNREACH);
4463 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4465 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4466 /* KAME hack: embed scopeid */
4467 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4468 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4471 if (over_addr == NULL) {
4472 struct sctp_ifa *_lsrc;
4474 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4478 if (_lsrc == NULL) {
4479 sctp_handle_no_route(stcb, net, so_locked);
4480 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4482 return (EHOSTUNREACH);
4484 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4485 sctp_free_ifa(_lsrc);
4487 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4488 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4490 (void)sa6_recoverscope(sin6);
4492 lsa6->sin6_port = inp->sctp_lport;
4494 if (ro->ro_rt == NULL) {
4496 * src addr selection failed to find a route
4497 * (or valid source addr), so we can't get
4500 sctp_handle_no_route(stcb, net, so_locked);
4501 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4503 return (EHOSTUNREACH);
4506 * XXX: sa6 may not have a valid sin6_scope_id in
4507 * the non-SCOPEDROUTING case.
4509 bzero(&lsa6_storage, sizeof(lsa6_storage));
4510 lsa6_storage.sin6_family = AF_INET6;
4511 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4512 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4513 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4514 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4519 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4520 lsa6_storage.sin6_port = inp->sctp_lport;
4521 lsa6 = &lsa6_storage;
4522 ip6h->ip6_src = lsa6->sin6_addr;
4525 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4526 sctp_handle_no_route(stcb, net, so_locked);
4527 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4529 return (EHOSTUNREACH);
4531 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4532 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4533 udp->uh_dport = port;
4534 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4536 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4538 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4541 sctphdr->src_port = src_port;
4542 sctphdr->dest_port = dest_port;
4543 sctphdr->v_tag = v_tag;
4544 sctphdr->checksum = 0;
4547 * We set the hop limit now since there is a good
4548 * chance that our ro pointer is now filled
4550 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4551 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4554 /* Copy to be sure something bad is not happening */
4555 sin6->sin6_addr = ip6h->ip6_dst;
4556 lsa6->sin6_addr = ip6h->ip6_src;
4559 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4560 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4561 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4562 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4563 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4565 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4567 * preserve the port and scope for link
4570 prev_scope = sin6->sin6_scope_id;
4571 prev_port = sin6->sin6_port;
4573 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4574 /* failed to prepend data, give up */
4576 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4579 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4581 #if defined(SCTP_WITH_NO_CSUM)
4582 SCTP_STAT_INCR(sctps_sendnocrc);
4584 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4585 SCTP_STAT_INCR(sctps_sendswcrc);
4587 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4588 udp->uh_sum = 0xffff;
4591 #if defined(SCTP_WITH_NO_CSUM)
4592 SCTP_STAT_INCR(sctps_sendnocrc);
4594 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4595 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4596 SCTP_STAT_INCR(sctps_sendhwcrc);
4599 /* send it out. table id is taken from stcb */
4600 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4601 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4602 so = SCTP_INP_SO(inp);
4603 SCTP_SOCKET_UNLOCK(so, 0);
4606 #ifdef SCTP_PACKET_LOGGING
4607 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4608 sctp_packet_log(o_pak);
4610 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4611 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4612 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4613 atomic_add_int(&stcb->asoc.refcnt, 1);
4614 SCTP_TCB_UNLOCK(stcb);
4615 SCTP_SOCKET_LOCK(so, 0);
4616 SCTP_TCB_LOCK(stcb);
4617 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4621 /* for link local this must be done */
4622 sin6->sin6_scope_id = prev_scope;
4623 sin6->sin6_port = prev_port;
4625 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4626 SCTP_STAT_INCR(sctps_sendpackets);
4627 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4629 SCTP_STAT_INCR(sctps_senderrors);
4632 /* Now if we had a temp route free it */
4636 * PMTU check versus smallest asoc MTU goes
4639 if (ro->ro_rt == NULL) {
4640 /* Route was freed */
4641 if (net->ro._s_addr &&
4642 net->src_addr_selected) {
4643 sctp_free_ifa(net->ro._s_addr);
4644 net->ro._s_addr = NULL;
4646 net->src_addr_selected = 0;
4648 if ((ro->ro_rt != NULL) &&
4649 (net->ro._s_addr)) {
4652 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4654 (stcb->asoc.smallest_mtu > mtu)) {
4655 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4658 net->mtu -= sizeof(struct udphdr);
4662 if (ND_IFINFO(ifp)->linkmtu &&
4663 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4664 sctp_mtu_size_reset(inp,
4666 ND_IFINFO(ifp)->linkmtu);
4674 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4675 ((struct sockaddr *)to)->sa_family);
4677 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4684 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4685 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4690 struct mbuf *m, *m_last;
4691 struct sctp_nets *net;
4692 struct sctp_init_chunk *init;
4693 struct sctp_supported_addr_param *sup_addr;
4694 struct sctp_adaptation_layer_indication *ali;
4695 struct sctp_supported_chunk_types_param *pr_supported;
4696 struct sctp_paramhdr *ph;
4697 int cnt_inits_to = 0;
4699 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4701 /* INIT's always go to the primary (and usually ONLY address) */
4702 net = stcb->asoc.primary_destination;
4704 net = TAILQ_FIRST(&stcb->asoc.nets);
4709 /* we confirm any address we send an INIT to */
4710 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4711 (void)sctp_set_primary_addr(stcb, NULL, net);
4713 /* we confirm any address we send an INIT to */
4714 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4716 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4718 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4720 * special hook, if we are sending to link local it will not
4721 * show up in our private address count.
4723 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4727 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4728 /* This case should not happen */
4729 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4732 /* start the INIT timer */
4733 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4735 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4737 /* No memory, INIT timer will re-attempt. */
4738 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4741 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4743 /* Now lets put the chunk header in place */
4744 init = mtod(m, struct sctp_init_chunk *);
4745 /* now the chunk header */
4746 init->ch.chunk_type = SCTP_INITIATION;
4747 init->ch.chunk_flags = 0;
4748 /* fill in later from mbuf we build */
4749 init->ch.chunk_length = 0;
4750 /* place in my tag */
4751 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4752 /* set up some of the credits. */
4753 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4754 SCTP_MINIMAL_RWND));
4755 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4756 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4757 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4759 /* Adaptation layer indication parameter */
4760 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4761 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4762 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4763 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4764 ali->ph.param_length = htons(parameter_len);
4765 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4766 chunk_len += parameter_len;
4769 if (stcb->asoc.ecn_supported == 1) {
4770 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4771 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4772 ph->param_type = htons(SCTP_ECN_CAPABLE);
4773 ph->param_length = htons(parameter_len);
4774 chunk_len += parameter_len;
4776 /* PR-SCTP supported parameter */
4777 if (stcb->asoc.prsctp_supported == 1) {
4778 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4779 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4780 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4781 ph->param_length = htons(parameter_len);
4782 chunk_len += parameter_len;
4784 /* Add NAT friendly parameter. */
4785 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4786 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4787 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4788 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4789 ph->param_length = htons(parameter_len);
4790 chunk_len += parameter_len;
4792 /* And now tell the peer which extensions we support */
4794 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4795 if (stcb->asoc.prsctp_supported == 1) {
4796 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4798 if (stcb->asoc.auth_supported == 1) {
4799 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4801 if (stcb->asoc.asconf_supported == 1) {
4802 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4803 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4805 if (stcb->asoc.reconfig_supported == 1) {
4806 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4808 if (stcb->asoc.nrsack_supported == 1) {
4809 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4811 if (stcb->asoc.pktdrop_supported == 1) {
4812 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4815 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4816 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4817 pr_supported->ph.param_length = htons(parameter_len);
4818 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4819 chunk_len += parameter_len;
4821 /* add authentication parameters */
4822 if (stcb->asoc.auth_supported) {
4823 /* attach RANDOM parameter, if available */
4824 if (stcb->asoc.authinfo.random != NULL) {
4825 struct sctp_auth_random *randp;
4827 if (padding_len > 0) {
4828 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4829 chunk_len += padding_len;
4832 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4833 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4834 /* random key already contains the header */
4835 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4836 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4837 chunk_len += parameter_len;
4839 /* add HMAC_ALGO parameter */
4840 if (stcb->asoc.local_hmacs != NULL) {
4841 struct sctp_auth_hmac_algo *hmacs;
4843 if (padding_len > 0) {
4844 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4845 chunk_len += padding_len;
4848 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4849 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4850 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4851 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4852 hmacs->ph.param_length = htons(parameter_len);
4853 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4854 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4855 chunk_len += parameter_len;
4857 /* add CHUNKS parameter */
4858 if (stcb->asoc.local_auth_chunks != NULL) {
4859 struct sctp_auth_chunk_list *chunks;
4861 if (padding_len > 0) {
4862 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4863 chunk_len += padding_len;
4866 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4867 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4868 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4869 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4870 chunks->ph.param_length = htons(parameter_len);
4871 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4872 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4873 chunk_len += parameter_len;
4876 /* now any cookie time extensions */
4877 if (stcb->asoc.cookie_preserve_req) {
4878 struct sctp_cookie_perserve_param *cookie_preserve;
4880 if (padding_len > 0) {
4881 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4882 chunk_len += padding_len;
4885 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4886 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4887 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4888 cookie_preserve->ph.param_length = htons(parameter_len);
4889 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4890 stcb->asoc.cookie_preserve_req = 0;
4891 chunk_len += parameter_len;
4893 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4896 if (padding_len > 0) {
4897 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4898 chunk_len += padding_len;
4901 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4902 if (stcb->asoc.scope.ipv4_addr_legal) {
4903 parameter_len += (uint16_t) sizeof(uint16_t);
4905 if (stcb->asoc.scope.ipv6_addr_legal) {
4906 parameter_len += (uint16_t) sizeof(uint16_t);
4908 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4909 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4910 sup_addr->ph.param_length = htons(parameter_len);
4912 if (stcb->asoc.scope.ipv4_addr_legal) {
4913 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4915 if (stcb->asoc.scope.ipv6_addr_legal) {
4916 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4918 padding_len = 4 - 2 * i;
4919 chunk_len += parameter_len;
4921 SCTP_BUF_LEN(m) = chunk_len;
4922 /* now the addresses */
4924 * To optimize this we could put the scoping stuff into a structure
4925 * and remove the individual uint8's from the assoc structure. Then
4926 * we could just sifa in the address within the stcb. But for now
4927 * this is a quick hack to get the address stuff teased apart.
4929 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4931 &padding_len, &chunk_len);
4933 init->ch.chunk_length = htons(chunk_len);
4934 if (padding_len > 0) {
4935 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4940 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4941 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4942 (struct sockaddr *)&net->ro._l_addr,
4943 m, 0, NULL, 0, 0, 0, 0,
4944 inp->sctp_lport, stcb->rport, htonl(0),
4948 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4949 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4950 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4954 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4955 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4958 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4959 * being equal to the beginning of the params i.e. (iphlen +
4960 * sizeof(struct sctp_init_msg) parse through the parameters to the
4961 * end of the mbuf verifying that all parameters are known.
4963 * For unknown parameters build and return a mbuf with
4964 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4965 * processing this chunk stop, and set *abort_processing to 1.
4967 * By having param_offset be pre-set to where parameters begin it is
4968 * hoped that this routine may be reused in the future by new
4971 struct sctp_paramhdr *phdr, params;
4973 struct mbuf *mat, *op_err;
4974 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4975 int at, limit, pad_needed;
4976 uint16_t ptype, plen, padded_size;
4979 *abort_processing = 0;
4982 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4985 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4986 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4987 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4988 ptype = ntohs(phdr->param_type);
4989 plen = ntohs(phdr->param_length);
4990 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4991 /* wacked parameter */
4992 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4995 limit -= SCTP_SIZE32(plen);
4997 * All parameters for all chunks that we know/understand are
4998 * listed here. We process them other places and make
4999 * appropriate stop actions per the upper bits. However this
5000 * is the generic routine processor's can call to get back
5001 * an operr.. to either incorporate (init-ack) or send.
5003 padded_size = SCTP_SIZE32(plen);
5005 /* Param's with variable size */
5006 case SCTP_HEARTBEAT_INFO:
5007 case SCTP_STATE_COOKIE:
5008 case SCTP_UNRECOG_PARAM:
5009 case SCTP_ERROR_CAUSE_IND:
5013 /* Param's with variable size within a range */
5014 case SCTP_CHUNK_LIST:
5015 case SCTP_SUPPORTED_CHUNK_EXT:
5016 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5017 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5022 case SCTP_SUPPORTED_ADDRTYPE:
5023 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5024 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5030 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5031 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5036 case SCTP_SET_PRIM_ADDR:
5037 case SCTP_DEL_IP_ADDRESS:
5038 case SCTP_ADD_IP_ADDRESS:
5039 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5040 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5041 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5046 /* Param's with a fixed size */
5047 case SCTP_IPV4_ADDRESS:
5048 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5049 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5054 case SCTP_IPV6_ADDRESS:
5055 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5056 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5061 case SCTP_COOKIE_PRESERVE:
5062 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5063 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5068 case SCTP_HAS_NAT_SUPPORT:
5071 case SCTP_PRSCTP_SUPPORTED:
5072 if (padded_size != sizeof(struct sctp_paramhdr)) {
5073 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5078 case SCTP_ECN_CAPABLE:
5079 if (padded_size != sizeof(struct sctp_paramhdr)) {
5080 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5085 case SCTP_ULP_ADAPTATION:
5086 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5087 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5092 case SCTP_SUCCESS_REPORT:
5093 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5094 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5099 case SCTP_HOSTNAME_ADDRESS:
5101 /* We can NOT handle HOST NAME addresses!! */
5104 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5105 *abort_processing = 1;
5106 if (op_err == NULL) {
5107 /* Ok need to try to get a mbuf */
5109 l_len = SCTP_MIN_OVERHEAD;
5111 l_len = SCTP_MIN_V4_OVERHEAD;
5113 l_len += sizeof(struct sctp_chunkhdr);
5115 l_len += sizeof(struct sctp_paramhdr);
5116 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5118 SCTP_BUF_LEN(op_err) = 0;
5120 * pre-reserve space for ip
5121 * and sctp header and
5125 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5127 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5129 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5130 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5134 /* If we have space */
5135 struct sctp_paramhdr s;
5138 uint32_t cpthis = 0;
5140 pad_needed = 4 - (err_at % 4);
5141 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5142 err_at += pad_needed;
5144 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5145 s.param_length = htons(sizeof(s) + plen);
5146 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5147 err_at += sizeof(s);
5148 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5150 sctp_m_freem(op_err);
5152 * we are out of memory but
5153 * we still need to have a
5154 * look at what to do (the
5155 * system is in trouble
5160 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5167 * we do not recognize the parameter figure out what
5170 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5171 if ((ptype & 0x4000) == 0x4000) {
5172 /* Report bit is set?? */
5173 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5174 if (op_err == NULL) {
5177 /* Ok need to try to get an mbuf */
5179 l_len = SCTP_MIN_OVERHEAD;
5181 l_len = SCTP_MIN_V4_OVERHEAD;
5183 l_len += sizeof(struct sctp_chunkhdr);
5185 l_len += sizeof(struct sctp_paramhdr);
5186 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5188 SCTP_BUF_LEN(op_err) = 0;
5190 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5192 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5194 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5195 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5199 /* If we have space */
5200 struct sctp_paramhdr s;
5203 uint32_t cpthis = 0;
5205 pad_needed = 4 - (err_at % 4);
5206 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5207 err_at += pad_needed;
5209 s.param_type = htons(SCTP_UNRECOG_PARAM);
5210 s.param_length = htons(sizeof(s) + plen);
5211 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5212 err_at += sizeof(s);
5213 if (plen > sizeof(tempbuf)) {
5214 plen = sizeof(tempbuf);
5216 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5218 sctp_m_freem(op_err);
5220 * we are out of memory but
5221 * we still need to have a
5222 * look at what to do (the
5223 * system is in trouble
5227 goto more_processing;
5229 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5234 if ((ptype & 0x8000) == 0x0000) {
5235 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5238 /* skip this chunk and continue processing */
5239 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5240 at += SCTP_SIZE32(plen);
5245 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5249 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5250 *abort_processing = 1;
5251 if ((op_err == NULL) && phdr) {
5255 l_len = SCTP_MIN_OVERHEAD;
5257 l_len = SCTP_MIN_V4_OVERHEAD;
5259 l_len += sizeof(struct sctp_chunkhdr);
5260 l_len += (2 * sizeof(struct sctp_paramhdr));
5261 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5263 SCTP_BUF_LEN(op_err) = 0;
5265 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5267 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5269 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5270 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5273 if ((op_err) && phdr) {
5274 struct sctp_paramhdr s;
5277 uint32_t cpthis = 0;
5279 pad_needed = 4 - (err_at % 4);
5280 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5281 err_at += pad_needed;
5283 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5284 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5285 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5286 err_at += sizeof(s);
5287 /* Only copy back the p-hdr that caused the issue */
5288 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5294 sctp_are_there_new_addresses(struct sctp_association *asoc,
5295 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5298 * Given a INIT packet, look through the packet to verify that there
5299 * are NO new addresses. As we go through the parameters add reports
5300 * of any un-understood parameters that require an error. Also we
5301 * must return (1) to drop the packet if we see a un-understood
5302 * parameter that tells us to drop the chunk.
5304 struct sockaddr *sa_touse;
5305 struct sockaddr *sa;
5306 struct sctp_paramhdr *phdr, params;
5307 uint16_t ptype, plen;
5309 struct sctp_nets *net;
5312 struct sockaddr_in sin4, *sa4;
5316 struct sockaddr_in6 sin6, *sa6;
5321 memset(&sin4, 0, sizeof(sin4));
5322 sin4.sin_family = AF_INET;
5323 sin4.sin_len = sizeof(sin4);
5326 memset(&sin6, 0, sizeof(sin6));
5327 sin6.sin6_family = AF_INET6;
5328 sin6.sin6_len = sizeof(sin6);
5330 /* First what about the src address of the pkt ? */
5332 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5333 sa = (struct sockaddr *)&net->ro._l_addr;
5334 if (sa->sa_family == src->sa_family) {
5336 if (sa->sa_family == AF_INET) {
5337 struct sockaddr_in *src4;
5339 sa4 = (struct sockaddr_in *)sa;
5340 src4 = (struct sockaddr_in *)src;
5341 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5348 if (sa->sa_family == AF_INET6) {
5349 struct sockaddr_in6 *src6;
5351 sa6 = (struct sockaddr_in6 *)sa;
5352 src6 = (struct sockaddr_in6 *)src;
5353 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5362 /* New address added! no need to look futher. */
5365 /* Ok so far lets munge through the rest of the packet */
5366 offset += sizeof(struct sctp_init_chunk);
5367 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5370 ptype = ntohs(phdr->param_type);
5371 plen = ntohs(phdr->param_length);
5374 case SCTP_IPV4_ADDRESS:
5376 struct sctp_ipv4addr_param *p4, p4_buf;
5378 phdr = sctp_get_next_param(in_initpkt, offset,
5379 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5380 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5384 p4 = (struct sctp_ipv4addr_param *)phdr;
5385 sin4.sin_addr.s_addr = p4->addr;
5386 sa_touse = (struct sockaddr *)&sin4;
5391 case SCTP_IPV6_ADDRESS:
5393 struct sctp_ipv6addr_param *p6, p6_buf;
5395 phdr = sctp_get_next_param(in_initpkt, offset,
5396 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5397 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5401 p6 = (struct sctp_ipv6addr_param *)phdr;
5402 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5404 sa_touse = (struct sockaddr *)&sin6;
5413 /* ok, sa_touse points to one to check */
5415 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5416 sa = (struct sockaddr *)&net->ro._l_addr;
5417 if (sa->sa_family != sa_touse->sa_family) {
5421 if (sa->sa_family == AF_INET) {
5422 sa4 = (struct sockaddr_in *)sa;
5423 if (sa4->sin_addr.s_addr ==
5424 sin4.sin_addr.s_addr) {
5431 if (sa->sa_family == AF_INET6) {
5432 sa6 = (struct sockaddr_in6 *)sa;
5433 if (SCTP6_ARE_ADDR_EQUAL(
5442 /* New addr added! no need to look further */
5446 offset += SCTP_SIZE32(plen);
5447 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5453 * Given a MBUF chain that was sent into us containing an INIT. Build a
5454 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5455 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5456 * message (i.e. the struct sctp_init_msg).
5459 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5460 struct mbuf *init_pkt, int iphlen, int offset,
5461 struct sockaddr *src, struct sockaddr *dst,
5462 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5463 uint8_t mflowtype, uint32_t mflowid,
5464 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5466 struct sctp_association *asoc;
5467 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5468 struct sctp_init_ack_chunk *initack;
5469 struct sctp_adaptation_layer_indication *ali;
5470 struct sctp_supported_chunk_types_param *pr_supported;
5471 struct sctp_paramhdr *ph;
5472 union sctp_sockstore *over_addr;
5473 struct sctp_scoping scp;
5476 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5477 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5478 struct sockaddr_in *sin;
5482 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5483 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5484 struct sockaddr_in6 *sin6;
5487 struct sockaddr *to;
5488 struct sctp_state_cookie stc;
5489 struct sctp_nets *net = NULL;
5490 uint8_t *signature = NULL;
5491 int cnt_inits_to = 0;
5492 uint16_t his_limit, i_want;
5494 int nat_friendly = 0;
5496 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5503 if ((asoc != NULL) &&
5504 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5505 (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) {
5506 /* new addresses, out of here in non-cookie-wait states */
5508 * Send a ABORT, we don't add the new address error clause
5509 * though we even set the T bit and copy in the 0 tag.. this
5510 * looks no different than if no listener was present.
5512 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5514 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5515 mflowtype, mflowid, inp->fibnum,
5520 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5521 (offset + sizeof(struct sctp_init_chunk)),
5522 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5525 if (op_err == NULL) {
5526 char msg[SCTP_DIAG_INFO_LEN];
5528 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5529 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5532 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5533 init_chk->init.initiate_tag, op_err,
5534 mflowtype, mflowid, inp->fibnum,
5538 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5540 /* No memory, INIT timer will re-attempt. */
5542 sctp_m_freem(op_err);
5545 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk);
5549 * We might not overwrite the identification[] completely and on
5550 * some platforms time_entered will contain some padding. Therefore
5551 * zero out the cookie to avoid putting uninitialized memory on the
5554 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5556 /* the time I built cookie */
5557 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5559 /* populate any tie tags */
5561 /* unlock before tag selections */
5562 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5563 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5564 stc.cookie_life = asoc->cookie_life;
5565 net = asoc->primary_destination;
5567 stc.tie_tag_my_vtag = 0;
5568 stc.tie_tag_peer_vtag = 0;
5569 /* life I will award this cookie */
5570 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5573 /* copy in the ports for later check */
5574 stc.myport = sh->dest_port;
5575 stc.peerport = sh->src_port;
5578 * If we wanted to honor cookie life extentions, we would add to
5579 * stc.cookie_life. For now we should NOT honor any extension
5581 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5582 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5583 stc.ipv6_addr_legal = 1;
5584 if (SCTP_IPV6_V6ONLY(inp)) {
5585 stc.ipv4_addr_legal = 0;
5587 stc.ipv4_addr_legal = 1;
5590 stc.ipv6_addr_legal = 0;
5591 stc.ipv4_addr_legal = 1;
5596 switch (dst->sa_family) {
5600 /* lookup address */
5601 stc.address[0] = src4->sin_addr.s_addr;
5605 stc.addr_type = SCTP_IPV4_ADDRESS;
5606 /* local from address */
5607 stc.laddress[0] = dst4->sin_addr.s_addr;
5608 stc.laddress[1] = 0;
5609 stc.laddress[2] = 0;
5610 stc.laddress[3] = 0;
5611 stc.laddr_type = SCTP_IPV4_ADDRESS;
5612 /* scope_id is only for v6 */
5614 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5615 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5618 /* Must use the address in this case */
5619 if (sctp_is_address_on_local_host(src, vrf_id)) {
5620 stc.loopback_scope = 1;
5623 stc.local_scope = 0;
5631 stc.addr_type = SCTP_IPV6_ADDRESS;
5632 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5633 stc.scope_id = in6_getscope(&src6->sin6_addr);
5634 if (sctp_is_address_on_local_host(src, vrf_id)) {
5635 stc.loopback_scope = 1;
5636 stc.local_scope = 0;
5639 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5640 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5642 * If the new destination or source
5643 * is a LINK_LOCAL we must have
5644 * common both site and local scope.
5645 * Don't set local scope though
5646 * since we must depend on the
5647 * source to be added implicitly. We
5648 * cannot assure just because we
5649 * share one link that all links are
5652 stc.local_scope = 0;
5656 * we start counting for the private
5657 * address stuff at 1. since the
5658 * link local we source from won't
5659 * show up in our scoped count.
5663 * pull out the scope_id from
5666 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5667 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5669 * If the new destination or source
5670 * is SITE_LOCAL then we must have
5671 * site scope in common.
5675 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5676 stc.laddr_type = SCTP_IPV6_ADDRESS;
5686 /* set the scope per the existing tcb */
5689 struct sctp_nets *lnet;
5693 stc.loopback_scope = asoc->scope.loopback_scope;
5694 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5695 stc.site_scope = asoc->scope.site_scope;
5696 stc.local_scope = asoc->scope.local_scope;
5698 /* Why do we not consider IPv4 LL addresses? */
5699 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5700 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5701 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5703 * if we have a LL address, start
5711 /* use the net pointer */
5712 to = (struct sockaddr *)&net->ro._l_addr;
5713 switch (to->sa_family) {
5716 sin = (struct sockaddr_in *)to;
5717 stc.address[0] = sin->sin_addr.s_addr;
5721 stc.addr_type = SCTP_IPV4_ADDRESS;
5722 if (net->src_addr_selected == 0) {
5724 * strange case here, the INIT should have
5725 * did the selection.
5727 net->ro._s_addr = sctp_source_address_selection(inp,
5728 stcb, (sctp_route_t *) & net->ro,
5730 if (net->ro._s_addr == NULL)
5733 net->src_addr_selected = 1;
5736 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5737 stc.laddress[1] = 0;
5738 stc.laddress[2] = 0;
5739 stc.laddress[3] = 0;
5740 stc.laddr_type = SCTP_IPV4_ADDRESS;
5741 /* scope_id is only for v6 */
5747 sin6 = (struct sockaddr_in6 *)to;
5748 memcpy(&stc.address, &sin6->sin6_addr,
5749 sizeof(struct in6_addr));
5750 stc.addr_type = SCTP_IPV6_ADDRESS;
5751 stc.scope_id = sin6->sin6_scope_id;
5752 if (net->src_addr_selected == 0) {
5754 * strange case here, the INIT should have
5755 * done the selection.
5757 net->ro._s_addr = sctp_source_address_selection(inp,
5758 stcb, (sctp_route_t *) & net->ro,
5760 if (net->ro._s_addr == NULL)
5763 net->src_addr_selected = 1;
5765 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5766 sizeof(struct in6_addr));
5767 stc.laddr_type = SCTP_IPV6_ADDRESS;
5772 /* Now lets put the SCTP header in place */
5773 initack = mtod(m, struct sctp_init_ack_chunk *);
5774 /* Save it off for quick ref */
5775 stc.peers_vtag = init_chk->init.initiate_tag;
5777 memcpy(stc.identification, SCTP_VERSION_STRING,
5778 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5779 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5780 /* now the chunk header */
5781 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5782 initack->ch.chunk_flags = 0;
5783 /* fill in later from mbuf we build */
5784 initack->ch.chunk_length = 0;
5785 /* place in my tag */
5786 if ((asoc != NULL) &&
5787 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5788 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5789 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5790 /* re-use the v-tags and init-seq here */
5791 initack->init.initiate_tag = htonl(asoc->my_vtag);
5792 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5794 uint32_t vtag, itsn;
5796 if (hold_inp_lock) {
5797 SCTP_INP_INCR_REF(inp);
5798 SCTP_INP_RUNLOCK(inp);
5801 atomic_add_int(&asoc->refcnt, 1);
5802 SCTP_TCB_UNLOCK(stcb);
5804 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5805 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5807 * Got a duplicate vtag on some guy behind a
5808 * nat make sure we don't use it.
5812 initack->init.initiate_tag = htonl(vtag);
5813 /* get a TSN to use too */
5814 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5815 initack->init.initial_tsn = htonl(itsn);
5816 SCTP_TCB_LOCK(stcb);
5817 atomic_add_int(&asoc->refcnt, -1);
5819 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5820 initack->init.initiate_tag = htonl(vtag);
5821 /* get a TSN to use too */
5822 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5824 if (hold_inp_lock) {
5825 SCTP_INP_RLOCK(inp);
5826 SCTP_INP_DECR_REF(inp);
5829 /* save away my tag to */
5830 stc.my_vtag = initack->init.initiate_tag;
5832 /* set up some of the credits. */
5833 so = inp->sctp_socket;
5835 /* memory problem */
5839 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5841 /* set what I want */
5842 his_limit = ntohs(init_chk->init.num_inbound_streams);
5843 /* choose what I want */
5845 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5846 i_want = asoc->streamoutcnt;
5848 i_want = asoc->pre_open_streams;
5851 i_want = inp->sctp_ep.pre_open_stream_count;
5853 if (his_limit < i_want) {
5854 /* I Want more :< */
5855 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5857 /* I can have what I want :> */
5858 initack->init.num_outbound_streams = htons(i_want);
5860 /* tell him his limit. */
5861 initack->init.num_inbound_streams =
5862 htons(inp->sctp_ep.max_open_streams_intome);
5864 /* adaptation layer indication parameter */
5865 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5866 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
5867 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5868 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5869 ali->ph.param_length = htons(parameter_len);
5870 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5871 chunk_len += parameter_len;
5874 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5875 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5876 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5877 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5878 ph->param_type = htons(SCTP_ECN_CAPABLE);
5879 ph->param_length = htons(parameter_len);
5880 chunk_len += parameter_len;
5882 /* PR-SCTP supported parameter */
5883 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5884 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5885 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5886 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5887 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5888 ph->param_length = htons(parameter_len);
5889 chunk_len += parameter_len;
5891 /* Add NAT friendly parameter */
5893 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5894 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5895 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5896 ph->param_length = htons(parameter_len);
5897 chunk_len += parameter_len;
5899 /* And now tell the peer which extensions we support */
5901 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5902 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5903 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5904 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5906 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5907 ((asoc == NULL) && (inp->auth_supported == 1))) {
5908 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5910 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5911 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5912 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5913 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5915 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5916 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5917 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5919 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5920 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5921 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5923 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5924 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5925 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5928 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5929 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5930 pr_supported->ph.param_length = htons(parameter_len);
5931 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5932 chunk_len += parameter_len;
5934 /* add authentication parameters */
5935 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5936 ((asoc == NULL) && (inp->auth_supported == 1))) {
5937 struct sctp_auth_random *randp;
5938 struct sctp_auth_hmac_algo *hmacs;
5939 struct sctp_auth_chunk_list *chunks;
5941 if (padding_len > 0) {
5942 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5943 chunk_len += padding_len;
5946 /* generate and add RANDOM parameter */
5947 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
5948 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) +
5949 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5950 randp->ph.param_type = htons(SCTP_RANDOM);
5951 randp->ph.param_length = htons(parameter_len);
5952 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
5953 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5954 chunk_len += parameter_len;
5956 if (padding_len > 0) {
5957 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5958 chunk_len += padding_len;
5961 /* add HMAC_ALGO parameter */
5962 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
5963 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) +
5964 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5965 (uint8_t *) hmacs->hmac_ids);
5966 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5967 hmacs->ph.param_length = htons(parameter_len);
5968 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5969 chunk_len += parameter_len;
5971 if (padding_len > 0) {
5972 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5973 chunk_len += padding_len;
5976 /* add CHUNKS parameter */
5977 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
5978 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) +
5979 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5980 chunks->chunk_types);
5981 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5982 chunks->ph.param_length = htons(parameter_len);
5983 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5984 chunk_len += parameter_len;
5986 SCTP_BUF_LEN(m) = chunk_len;
5988 /* now the addresses */
5990 * To optimize this we could put the scoping stuff into a structure
5991 * and remove the individual uint8's from the stc structure. Then we
5992 * could just sifa in the address within the stc.. but for now this
5993 * is a quick hack to get the address stuff teased apart.
5995 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5996 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5997 scp.loopback_scope = stc.loopback_scope;
5998 scp.ipv4_local_scope = stc.ipv4_scope;
5999 scp.local_scope = stc.local_scope;
6000 scp.site_scope = stc.site_scope;
6001 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6003 &padding_len, &chunk_len);
6004 /* padding_len can only be positive, if no addresses have been added */
6005 if (padding_len > 0) {
6006 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6007 chunk_len += padding_len;
6008 SCTP_BUF_LEN(m) += padding_len;
6011 /* tack on the operational error if present */
6014 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6015 parameter_len += SCTP_BUF_LEN(m_tmp);
6017 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6018 SCTP_BUF_NEXT(m_last) = op_err;
6019 while (SCTP_BUF_NEXT(m_last) != NULL) {
6020 m_last = SCTP_BUF_NEXT(m_last);
6022 chunk_len += parameter_len;
6024 if (padding_len > 0) {
6025 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6026 if (m_last == NULL) {
6027 /* Houston we have a problem, no space */
6031 chunk_len += padding_len;
6034 /* Now we must build a cookie */
6035 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6036 if (m_cookie == NULL) {
6037 /* memory problem */
6041 /* Now append the cookie to the end and update the space/size */
6042 SCTP_BUF_NEXT(m_last) = m_cookie;
6044 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6045 parameter_len += SCTP_BUF_LEN(m_tmp);
6046 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6050 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6051 chunk_len += parameter_len;
6054 * Place in the size, but we don't include the last pad (if any) in
6057 initack->ch.chunk_length = htons(chunk_len);
6060 * Time to sign the cookie, we don't sign over the cookie signature
6061 * though thus we set trailer.
6063 (void)sctp_hmac_m(SCTP_HMAC,
6064 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6065 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6066 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6068 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6069 * here since the timer will drive a retranmission.
6071 if (padding_len > 0) {
6072 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6077 if (stc.loopback_scope) {
6078 over_addr = (union sctp_sockstore *)dst;
6083 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6085 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6088 SCTP_SO_NOT_LOCKED);
6089 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6094 sctp_prune_prsctp(struct sctp_tcb *stcb,
6095 struct sctp_association *asoc,
6096 struct sctp_sndrcvinfo *srcv,
6100 struct sctp_tmit_chunk *chk, *nchk;
6102 SCTP_TCB_LOCK_ASSERT(stcb);
6103 if ((asoc->prsctp_supported) &&
6104 (asoc->sent_queue_cnt_removeable > 0)) {
6105 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6107 * Look for chunks marked with the PR_SCTP flag AND
6108 * the buffer space flag. If the one being sent is
6109 * equal or greater priority then purge the old one
6110 * and free some space.
6112 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6114 * This one is PR-SCTP AND buffer space
6117 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6119 * Lower numbers equates to higher
6120 * priority so if the one we are
6121 * looking at has a larger or equal
6122 * priority we want to drop the data
6123 * and NOT retransmit it.
6127 * We release the book_size
6128 * if the mbuf is here
6133 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6137 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6140 freed_spc += ret_spc;
6141 if (freed_spc >= dataout) {
6144 } /* if chunk was present */
6145 } /* if of sufficent priority */
6146 } /* if chunk has enabled */
6147 } /* tailqforeach */
6149 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6150 /* Here we must move to the sent queue and mark */
6151 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6152 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6155 * We release the book_size
6156 * if the mbuf is here
6160 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6163 freed_spc += ret_spc;
6164 if (freed_spc >= dataout) {
6167 } /* end if chk->data */
6168 } /* end if right class */
6169 } /* end if chk pr-sctp */
6170 } /* tailqforeachsafe (chk) */
6171 } /* if enabled in asoc */
6175 sctp_get_frag_point(struct sctp_tcb *stcb,
6176 struct sctp_association *asoc)
6181 * For endpoints that have both v6 and v4 addresses we must reserve
6182 * room for the ipv6 header, for those that are only dealing with V4
6183 * we use a larger frag point.
6185 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6186 ovh = SCTP_MED_OVERHEAD;
6188 ovh = SCTP_MED_V4_OVERHEAD;
6191 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6192 siz = asoc->smallest_mtu - ovh;
6194 siz = (stcb->asoc.sctp_frag_point - ovh);
6196 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6198 /* A data chunk MUST fit in a cluster */
6199 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6202 /* adjust for an AUTH chunk if DATA requires auth */
6203 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6204 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6207 /* make it an even word boundary please */
6214 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6217 * We assume that the user wants PR_SCTP_TTL if the user provides a
6218 * positive lifetime but does not specify any PR_SCTP policy.
6220 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6221 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6222 } else if (sp->timetolive > 0) {
6223 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6224 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6228 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6229 case CHUNK_FLAGS_PR_SCTP_BUF:
6231 * Time to live is a priority stored in tv_sec when doing
6232 * the buffer drop thing.
6234 sp->ts.tv_sec = sp->timetolive;
6237 case CHUNK_FLAGS_PR_SCTP_TTL:
6241 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6242 tv.tv_sec = sp->timetolive / 1000;
6243 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6245 * TODO sctp_constants.h needs alternative time
6246 * macros when _KERNEL is undefined.
6248 timevaladd(&sp->ts, &tv);
6251 case CHUNK_FLAGS_PR_SCTP_RTX:
6253 * Time to live is a the number or retransmissions stored in
6256 sp->ts.tv_sec = sp->timetolive;
6260 SCTPDBG(SCTP_DEBUG_USRREQ1,
6261 "Unknown PR_SCTP policy %u.\n",
6262 PR_SCTP_POLICY(sp->sinfo_flags));
6268 sctp_msg_append(struct sctp_tcb *stcb,
6269 struct sctp_nets *net,
6271 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6275 struct sctp_stream_queue_pending *sp = NULL;
6276 struct sctp_stream_out *strm;
6279 * Given an mbuf chain, put it into the association send queue and
6280 * place it on the wheel
6282 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6283 /* Invalid stream number */
6284 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6288 if ((stcb->asoc.stream_locked) &&
6289 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6290 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6294 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6295 /* Now can we send this? */
6296 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6297 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6298 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6299 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6300 /* got data while shutting down */
6301 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6305 sctp_alloc_a_strmoq(stcb, sp);
6307 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6311 sp->sinfo_flags = srcv->sinfo_flags;
6312 sp->timetolive = srcv->sinfo_timetolive;
6313 sp->ppid = srcv->sinfo_ppid;
6314 sp->context = srcv->sinfo_context;
6315 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6317 atomic_add_int(&sp->net->ref_count, 1);
6321 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6322 sp->stream = srcv->sinfo_stream;
6323 sp->msg_is_complete = 1;
6324 sp->sender_all_done = 1;
6327 sp->tail_mbuf = NULL;
6328 sctp_set_prsctp_policy(sp);
6330 * We could in theory (for sendall) sifa the length in, but we would
6331 * still have to hunt through the chain since we need to setup the
6335 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6336 if (SCTP_BUF_NEXT(at) == NULL)
6338 sp->length += SCTP_BUF_LEN(at);
6340 if (srcv->sinfo_keynumber_valid) {
6341 sp->auth_keyid = srcv->sinfo_keynumber;
6343 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6345 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6346 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6347 sp->holds_key_ref = 1;
6349 if (hold_stcb_lock == 0) {
6350 SCTP_TCB_SEND_LOCK(stcb);
6352 sctp_snd_sb_alloc(stcb, sp->length);
6353 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6354 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6355 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6357 if (hold_stcb_lock == 0) {
6358 SCTP_TCB_SEND_UNLOCK(stcb);
6368 static struct mbuf *
6369 sctp_copy_mbufchain(struct mbuf *clonechain,
6370 struct mbuf *outchain,
6371 struct mbuf **endofchain,
6374 uint8_t copy_by_ref)
6377 struct mbuf *appendchain;
6381 if (endofchain == NULL) {
6385 sctp_m_freem(outchain);
6388 if (can_take_mbuf) {
6389 appendchain = clonechain;
6392 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6394 /* Its not in a cluster */
6395 if (*endofchain == NULL) {
6396 /* lets get a mbuf cluster */
6397 if (outchain == NULL) {
6398 /* This is the general case */
6400 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6401 if (outchain == NULL) {
6404 SCTP_BUF_LEN(outchain) = 0;
6405 *endofchain = outchain;
6406 /* get the prepend space */
6407 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6410 * We really should not get a NULL
6416 if (SCTP_BUF_NEXT(m) == NULL) {
6420 m = SCTP_BUF_NEXT(m);
6423 if (*endofchain == NULL) {
6425 * huh, TSNH XXX maybe we
6428 sctp_m_freem(outchain);
6432 /* get the new end of length */
6433 len = M_TRAILINGSPACE(*endofchain);
6435 /* how much is left at the end? */
6436 len = M_TRAILINGSPACE(*endofchain);
6438 /* Find the end of the data, for appending */
6439 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6441 /* Now lets copy it out */
6442 if (len >= sizeofcpy) {
6443 /* It all fits, copy it in */
6444 m_copydata(clonechain, 0, sizeofcpy, cp);
6445 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6447 /* fill up the end of the chain */
6449 m_copydata(clonechain, 0, len, cp);
6450 SCTP_BUF_LEN((*endofchain)) += len;
6451 /* now we need another one */
6454 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6459 SCTP_BUF_NEXT((*endofchain)) = m;
6461 cp = mtod((*endofchain), caddr_t);
6462 m_copydata(clonechain, len, sizeofcpy, cp);
6463 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6467 /* copy the old fashion way */
6468 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6469 #ifdef SCTP_MBUF_LOGGING
6470 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6471 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6476 if (appendchain == NULL) {
6479 sctp_m_freem(outchain);
6483 /* tack on to the end */
6484 if (*endofchain != NULL) {
6485 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6489 if (SCTP_BUF_NEXT(m) == NULL) {
6490 SCTP_BUF_NEXT(m) = appendchain;
6493 m = SCTP_BUF_NEXT(m);
6497 * save off the end and update the end-chain postion
6501 if (SCTP_BUF_NEXT(m) == NULL) {
6505 m = SCTP_BUF_NEXT(m);
6509 /* save off the end and update the end-chain postion */
6512 if (SCTP_BUF_NEXT(m) == NULL) {
6516 m = SCTP_BUF_NEXT(m);
6518 return (appendchain);
6523 sctp_med_chunk_output(struct sctp_inpcb *inp,
6524 struct sctp_tcb *stcb,
6525 struct sctp_association *asoc,
6528 int control_only, int from_where,
6529 struct timeval *now, int *now_filled, int frag_point, int so_locked
6530 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6536 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6537 uint32_t val SCTP_UNUSED)
6539 struct sctp_copy_all *ca;
6542 int added_control = 0;
6543 int un_sent, do_chunk_output = 1;
6544 struct sctp_association *asoc;
6545 struct sctp_nets *net;
6547 ca = (struct sctp_copy_all *)ptr;
6548 if (ca->m == NULL) {
6551 if (ca->inp != inp) {
6555 if (ca->sndlen > 0) {
6556 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6558 /* can't copy so we are done */
6562 #ifdef SCTP_MBUF_LOGGING
6563 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6564 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6570 SCTP_TCB_LOCK_ASSERT(stcb);
6571 if (stcb->asoc.alternate) {
6572 net = stcb->asoc.alternate;
6574 net = stcb->asoc.primary_destination;
6576 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6577 /* Abort this assoc with m as the user defined reason */
6579 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6581 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6582 0, M_NOWAIT, 1, MT_DATA);
6583 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6586 struct sctp_paramhdr *ph;
6588 ph = mtod(m, struct sctp_paramhdr *);
6589 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6590 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
6593 * We add one here to keep the assoc from dis-appearing on
6596 atomic_add_int(&stcb->asoc.refcnt, 1);
6597 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6599 * sctp_abort_an_association calls sctp_free_asoc() free
6600 * association will NOT free it since we incremented the
6601 * refcnt .. we do this to prevent it being freed and things
6602 * getting tricky since we could end up (from free_asoc)
6603 * calling inpcb_free which would get a recursive lock call
6604 * to the iterator lock.. But as a consequence of that the
6605 * stcb will return to us un-locked.. since free_asoc
6606 * returns with either no TCB or the TCB unlocked, we must
6607 * relock.. to unlock in the iterator timer :-0
6609 SCTP_TCB_LOCK(stcb);
6610 atomic_add_int(&stcb->asoc.refcnt, -1);
6611 goto no_chunk_output;
6614 ret = sctp_msg_append(stcb, net, m,
6618 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6619 /* shutdown this assoc */
6622 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6624 if (TAILQ_EMPTY(&asoc->send_queue) &&
6625 TAILQ_EMPTY(&asoc->sent_queue) &&
6627 if (asoc->locked_on_sending) {
6631 * there is nothing queued to send, so I'm
6634 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6635 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6636 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6638 * only send SHUTDOWN the first time
6641 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6642 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6644 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6645 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6646 sctp_stop_timers_for_shutdown(stcb);
6647 sctp_send_shutdown(stcb, net);
6648 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6650 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6651 asoc->primary_destination);
6653 do_chunk_output = 0;
6657 * we still got (or just got) data to send,
6658 * so set SHUTDOWN_PENDING
6661 * XXX sockets draft says that SCTP_EOF
6662 * should be sent with no data. currently,
6663 * we will allow user data to be sent first
6664 * and move to SHUTDOWN-PENDING
6666 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6667 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6668 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6669 if (asoc->locked_on_sending) {
6671 * Locked to send out the
6674 struct sctp_stream_queue_pending *sp;
6676 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6678 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6679 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6682 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6683 if (TAILQ_EMPTY(&asoc->send_queue) &&
6684 TAILQ_EMPTY(&asoc->sent_queue) &&
6685 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6686 struct mbuf *op_err;
6687 char msg[SCTP_DIAG_INFO_LEN];
6690 snprintf(msg, sizeof(msg),
6691 "%s:%d at %s", __FILE__, __LINE__, __func__);
6692 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6694 atomic_add_int(&stcb->asoc.refcnt, 1);
6695 sctp_abort_an_association(stcb->sctp_ep, stcb,
6696 op_err, SCTP_SO_NOT_LOCKED);
6697 atomic_add_int(&stcb->asoc.refcnt, -1);
6698 goto no_chunk_output;
6700 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6701 asoc->primary_destination);
6707 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6708 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6710 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6711 (stcb->asoc.total_flight > 0) &&
6712 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6713 do_chunk_output = 0;
6715 if (do_chunk_output)
6716 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6717 else if (added_control) {
6718 int num_out, reason, now_filled = 0;
6722 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6723 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6724 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6735 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6737 struct sctp_copy_all *ca;
6739 ca = (struct sctp_copy_all *)ptr;
6741 * Do a notify here? Kacheong suggests that the notify be done at
6742 * the send time.. so you would push up a notification if any send
6743 * failed. Don't know if this is feasable since the only failures we
6744 * have is "memory" related and if you cannot get an mbuf to send
6745 * the data you surely can't get an mbuf to send up to notify the
6746 * user you can't send the data :->
6749 /* now free everything */
6750 sctp_m_freem(ca->m);
6751 SCTP_FREE(ca, SCTP_M_COPYAL);
6754 static struct mbuf *
6755 sctp_copy_out_all(struct uio *uio, int len)
6757 struct mbuf *ret, *at;
6758 int left, willcpy, cancpy, error;
6760 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6766 SCTP_BUF_LEN(ret) = 0;
6767 /* save space for the data chunk header */
6768 cancpy = M_TRAILINGSPACE(ret);
6769 willcpy = min(cancpy, left);
6772 /* Align data to the end */
6773 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6779 SCTP_BUF_LEN(at) = willcpy;
6780 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6783 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6784 if (SCTP_BUF_NEXT(at) == NULL) {
6787 at = SCTP_BUF_NEXT(at);
6788 SCTP_BUF_LEN(at) = 0;
6789 cancpy = M_TRAILINGSPACE(at);
6790 willcpy = min(cancpy, left);
6797 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6798 struct sctp_sndrcvinfo *srcv)
6801 struct sctp_copy_all *ca;
6803 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6807 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6810 memset(ca, 0, sizeof(struct sctp_copy_all));
6814 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6817 * take off the sendall flag, it would be bad if we failed to do
6820 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6821 /* get length and mbuf chain */
6823 ca->sndlen = uio->uio_resid;
6824 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6825 if (ca->m == NULL) {
6826 SCTP_FREE(ca, SCTP_M_COPYAL);
6827 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6831 /* Gather the length of the send */
6835 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6836 ca->sndlen += SCTP_BUF_LEN(mat);
6839 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6840 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6841 SCTP_ASOC_ANY_STATE,
6843 sctp_sendall_completes, inp, 1);
6845 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6846 SCTP_FREE(ca, SCTP_M_COPYAL);
6847 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6855 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6857 struct sctp_tmit_chunk *chk, *nchk;
6859 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6860 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6861 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6863 sctp_m_freem(chk->data);
6866 asoc->ctrl_queue_cnt--;
6867 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6873 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6875 struct sctp_association *asoc;
6876 struct sctp_tmit_chunk *chk, *nchk;
6877 struct sctp_asconf_chunk *acp;
6880 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6881 /* find SCTP_ASCONF chunk in queue */
6882 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6884 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6885 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6890 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6892 sctp_m_freem(chk->data);
6895 asoc->ctrl_queue_cnt--;
6896 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6903 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6904 struct sctp_association *asoc,
6905 struct sctp_tmit_chunk **data_list,
6907 struct sctp_nets *net)
6910 struct sctp_tmit_chunk *tp1;
6912 for (i = 0; i < bundle_at; i++) {
6913 /* off of the send queue */
6914 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6915 asoc->send_queue_cnt--;
6918 * Any chunk NOT 0 you zap the time chunk 0 gets
6919 * zapped or set based on if a RTO measurment is
6922 data_list[i]->do_rtt = 0;
6925 data_list[i]->sent_rcv_time = net->last_sent_time;
6926 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6927 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6928 if (data_list[i]->whoTo == NULL) {
6929 data_list[i]->whoTo = net;
6930 atomic_add_int(&net->ref_count, 1);
6932 /* on to the sent queue */
6933 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6934 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6935 struct sctp_tmit_chunk *tpp;
6937 /* need to move back */
6939 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6941 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6945 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6948 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6950 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6955 /* This does not lower until the cum-ack passes it */
6956 asoc->sent_queue_cnt++;
6957 if ((asoc->peers_rwnd <= 0) &&
6958 (asoc->total_flight == 0) &&
6960 /* Mark the chunk as being a window probe */
6961 SCTP_STAT_INCR(sctps_windowprobed);
6963 #ifdef SCTP_AUDITING_ENABLED
6964 sctp_audit_log(0xC2, 3);
6966 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6967 data_list[i]->snd_count = 1;
6968 data_list[i]->rec.data.chunk_was_revoked = 0;
6969 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6970 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6971 data_list[i]->whoTo->flight_size,
6972 data_list[i]->book_size,
6973 (uintptr_t) data_list[i]->whoTo,
6974 data_list[i]->rec.data.TSN_seq);
6976 sctp_flight_size_increase(data_list[i]);
6977 sctp_total_flight_increase(stcb, data_list[i]);
6978 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6979 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6980 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6982 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6983 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6984 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6985 /* SWS sender side engages */
6986 asoc->peers_rwnd = 0;
6989 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6990 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
6995 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
6996 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7001 struct sctp_tmit_chunk *chk, *nchk;
7003 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7004 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7005 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7006 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7007 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7008 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7009 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7010 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7011 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7012 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7013 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7014 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7015 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7016 /* Stray chunks must be cleaned up */
7018 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7020 sctp_m_freem(chk->data);
7023 asoc->ctrl_queue_cnt--;
7024 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7025 asoc->fwd_tsn_cnt--;
7026 sctp_free_a_chunk(stcb, chk, so_locked);
7027 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7028 /* special handling, we must look into the param */
7029 if (chk != asoc->str_reset) {
7030 goto clean_up_anyway;
7038 sctp_can_we_split_this(struct sctp_tcb *stcb,
7040 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7043 * Make a decision on if I should split a msg into multiple parts.
7044 * This is only asked of incomplete messages.
7048 * If we are doing EEOR we need to always send it if its the
7049 * entire thing, since it might be all the guy is putting in
7052 if (goal_mtu >= length) {
7054 * If we have data outstanding,
7055 * we get another chance when the sack
7056 * arrives to transmit - wait for more data
7058 if (stcb->asoc.total_flight == 0) {
7060 * If nothing is in flight, we zero the
7068 /* You can fill the rest */
7073 * For those strange folk that make the send buffer
7074 * smaller than our fragmentation point, we can't
7075 * get a full msg in so we have to allow splitting.
7077 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7080 if ((length <= goal_mtu) ||
7081 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7082 /* Sub-optimial residual don't split in non-eeor mode. */
7086 * If we reach here length is larger than the goal_mtu. Do we wish
7087 * to split it for the sake of packet putting together?
7089 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7090 /* Its ok to split it */
7091 return (min(goal_mtu, frag_point));
7093 /* Nope, can't split */
7099 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7100 struct sctp_stream_out *strq,
7102 uint32_t frag_point,
7108 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7113 /* Move from the stream to the send_queue keeping track of the total */
7114 struct sctp_association *asoc;
7115 struct sctp_stream_queue_pending *sp;
7116 struct sctp_tmit_chunk *chk;
7117 struct sctp_data_chunk *dchkh;
7118 uint32_t to_move, length;
7119 uint8_t rcv_flags = 0;
7121 uint8_t send_lock_up = 0;
7123 SCTP_TCB_LOCK_ASSERT(stcb);
7126 /* sa_ignore FREED_MEMORY */
7127 sp = TAILQ_FIRST(&strq->outqueue);
7130 if (send_lock_up == 0) {
7131 SCTP_TCB_SEND_LOCK(stcb);
7134 sp = TAILQ_FIRST(&strq->outqueue);
7138 if (strq->last_msg_incomplete) {
7139 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7141 strq->last_msg_incomplete);
7142 strq->last_msg_incomplete = 0;
7146 SCTP_TCB_SEND_UNLOCK(stcb);
7151 if ((sp->msg_is_complete) && (sp->length == 0)) {
7152 if (sp->sender_all_done) {
7154 * We are doing differed cleanup. Last time through
7155 * when we took all the data the sender_all_done was
7158 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7159 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7160 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7161 sp->sender_all_done,
7163 sp->msg_is_complete,
7167 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7168 SCTP_TCB_SEND_LOCK(stcb);
7171 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7172 TAILQ_REMOVE(&strq->outqueue, sp, next);
7173 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7174 (strq->chunks_on_queues == 0) &&
7175 TAILQ_EMPTY(&strq->outqueue)) {
7176 stcb->asoc.trigger_reset = 1;
7178 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7180 sctp_free_remote_addr(sp->net);
7184 sctp_m_freem(sp->data);
7187 sctp_free_a_strmoq(stcb, sp, so_locked);
7188 /* we can't be locked to it */
7190 stcb->asoc.locked_on_sending = NULL;
7192 SCTP_TCB_SEND_UNLOCK(stcb);
7195 /* back to get the next msg */
7199 * sender just finished this but still holds a
7208 /* is there some to get */
7209 if (sp->length == 0) {
7215 } else if (sp->discard_rest) {
7216 if (send_lock_up == 0) {
7217 SCTP_TCB_SEND_LOCK(stcb);
7220 /* Whack down the size */
7221 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7222 if ((stcb->sctp_socket != NULL) &&
7223 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7224 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7225 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7228 sctp_m_freem(sp->data);
7230 sp->tail_mbuf = NULL;
7240 some_taken = sp->some_taken;
7242 length = sp->length;
7243 if (sp->msg_is_complete) {
7244 /* The message is complete */
7245 to_move = min(length, frag_point);
7246 if (to_move == length) {
7247 /* All of it fits in the MTU */
7248 if (sp->some_taken) {
7249 rcv_flags |= SCTP_DATA_LAST_FRAG;
7250 sp->put_last_out = 1;
7252 rcv_flags |= SCTP_DATA_NOT_FRAG;
7253 sp->put_last_out = 1;
7256 /* Not all of it fits, we fragment */
7257 if (sp->some_taken == 0) {
7258 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7263 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7266 * We use a snapshot of length in case it
7267 * is expanding during the compare.
7272 if (to_move >= llen) {
7274 if (send_lock_up == 0) {
7276 * We are taking all of an incomplete msg
7277 * thus we need a send lock.
7279 SCTP_TCB_SEND_LOCK(stcb);
7281 if (sp->msg_is_complete) {
7283 * the sender finished the
7290 if (sp->some_taken == 0) {
7291 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7295 /* Nothing to take. */
7296 if (sp->some_taken) {
7305 /* If we reach here, we can copy out a chunk */
7306 sctp_alloc_a_chunk(stcb, chk);
7308 /* No chunk memory */
7314 * Setup for unordered if needed by looking at the user sent info
7317 if (sp->sinfo_flags & SCTP_UNORDERED) {
7318 rcv_flags |= SCTP_DATA_UNORDERED;
7320 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7321 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7322 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7324 /* clear out the chunk before setting up */
7325 memset(chk, 0, sizeof(*chk));
7326 chk->rec.data.rcv_flags = rcv_flags;
7328 if (to_move >= length) {
7329 /* we think we can steal the whole thing */
7330 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7331 SCTP_TCB_SEND_LOCK(stcb);
7334 if (to_move < sp->length) {
7335 /* bail, it changed */
7338 chk->data = sp->data;
7339 chk->last_mbuf = sp->tail_mbuf;
7340 /* register the stealing */
7341 sp->data = sp->tail_mbuf = NULL;
7346 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7347 chk->last_mbuf = NULL;
7348 if (chk->data == NULL) {
7349 sp->some_taken = some_taken;
7350 sctp_free_a_chunk(stcb, chk, so_locked);
7355 #ifdef SCTP_MBUF_LOGGING
7356 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7357 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7360 /* Pull off the data */
7361 m_adj(sp->data, to_move);
7362 /* Now lets work our way down and compact it */
7364 while (m && (SCTP_BUF_LEN(m) == 0)) {
7365 sp->data = SCTP_BUF_NEXT(m);
7366 SCTP_BUF_NEXT(m) = NULL;
7367 if (sp->tail_mbuf == m) {
7369 * Freeing tail? TSNH since
7370 * we supposedly were taking less
7371 * than the sp->length.
7374 panic("Huh, freing tail? - TSNH");
7376 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7377 sp->tail_mbuf = sp->data = NULL;
7386 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7387 chk->copy_by_ref = 1;
7389 chk->copy_by_ref = 0;
7392 * get last_mbuf and counts of mb useage This is ugly but hopefully
7393 * its only one mbuf.
7395 if (chk->last_mbuf == NULL) {
7396 chk->last_mbuf = chk->data;
7397 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7398 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7401 if (to_move > length) {
7402 /*- This should not happen either
7403 * since we always lower to_move to the size
7404 * of sp->length if its larger.
7407 panic("Huh, how can to_move be larger?");
7409 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7413 atomic_subtract_int(&sp->length, to_move);
7415 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7416 /* Not enough room for a chunk header, get some */
7419 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7422 * we're in trouble here. _PREPEND below will free
7423 * all the data if there is no leading space, so we
7424 * must put the data back and restore.
7426 if (send_lock_up == 0) {
7427 SCTP_TCB_SEND_LOCK(stcb);
7430 if (sp->data == NULL) {
7431 /* unsteal the data */
7432 sp->data = chk->data;
7433 sp->tail_mbuf = chk->last_mbuf;
7437 /* reassemble the data */
7439 sp->data = chk->data;
7440 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7442 sp->some_taken = some_taken;
7443 atomic_add_int(&sp->length, to_move);
7446 sctp_free_a_chunk(stcb, chk, so_locked);
7450 SCTP_BUF_LEN(m) = 0;
7451 SCTP_BUF_NEXT(m) = chk->data;
7453 M_ALIGN(chk->data, 4);
7456 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
7457 if (chk->data == NULL) {
7458 /* HELP, TSNH since we assured it would not above? */
7460 panic("prepend failes HELP?");
7462 SCTP_PRINTF("prepend fails HELP?\n");
7463 sctp_free_a_chunk(stcb, chk, so_locked);
7469 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7470 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7471 chk->book_size_scale = 0;
7472 chk->sent = SCTP_DATAGRAM_UNSENT;
7475 chk->asoc = &stcb->asoc;
7476 chk->pad_inplace = 0;
7477 chk->no_fr_allowed = 0;
7478 chk->rec.data.stream_seq = strq->next_sequence_send;
7479 if ((rcv_flags & SCTP_DATA_LAST_FRAG) &&
7480 !(rcv_flags & SCTP_DATA_UNORDERED)) {
7481 strq->next_sequence_send++;
7483 chk->rec.data.stream_number = sp->stream;
7484 chk->rec.data.payloadtype = sp->ppid;
7485 chk->rec.data.context = sp->context;
7486 chk->rec.data.doing_fast_retransmit = 0;
7488 chk->rec.data.timetodrop = sp->ts;
7489 chk->flags = sp->act_flags;
7492 chk->whoTo = sp->net;
7493 atomic_add_int(&chk->whoTo->ref_count, 1);
7497 if (sp->holds_key_ref) {
7498 chk->auth_keyid = sp->auth_keyid;
7499 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7500 chk->holds_key_ref = 1;
7502 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7503 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7504 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7505 (uintptr_t) stcb, sp->length,
7506 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7507 chk->rec.data.TSN_seq);
7509 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7511 * Put the rest of the things in place now. Size was done earlier in
7512 * previous loop prior to padding.
7515 #ifdef SCTP_ASOCLOG_OF_TSNS
7516 SCTP_TCB_LOCK_ASSERT(stcb);
7517 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7518 asoc->tsn_out_at = 0;
7519 asoc->tsn_out_wrapped = 1;
7521 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7522 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7523 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7524 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7525 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7526 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7527 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7528 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7532 dchkh->ch.chunk_type = SCTP_DATA;
7533 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7534 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7535 dchkh->dp.stream_id = htons(strq->stream_no);
7536 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7537 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7538 dchkh->ch.chunk_length = htons(chk->send_size);
7539 /* Now advance the chk->send_size by the actual pad needed. */
7540 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7545 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7546 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7548 chk->last_mbuf = lm;
7549 chk->pad_inplace = 1;
7551 chk->send_size += pads;
7553 if (PR_SCTP_ENABLED(chk->flags)) {
7554 asoc->pr_sctp_cnt++;
7556 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7557 /* All done pull and kill the message */
7558 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7559 if (sp->put_last_out == 0) {
7560 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7561 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7562 sp->sender_all_done,
7564 sp->msg_is_complete,
7568 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7569 SCTP_TCB_SEND_LOCK(stcb);
7572 TAILQ_REMOVE(&strq->outqueue, sp, next);
7573 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7574 (strq->chunks_on_queues == 0) &&
7575 TAILQ_EMPTY(&strq->outqueue)) {
7576 stcb->asoc.trigger_reset = 1;
7578 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7580 sctp_free_remote_addr(sp->net);
7584 sctp_m_freem(sp->data);
7587 sctp_free_a_strmoq(stcb, sp, so_locked);
7589 /* we can't be locked to it */
7591 stcb->asoc.locked_on_sending = NULL;
7593 /* more to go, we are locked */
7596 asoc->chunks_on_out_queue++;
7597 strq->chunks_on_queues++;
7598 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7599 asoc->send_queue_cnt++;
7602 SCTP_TCB_SEND_UNLOCK(stcb);
7609 sctp_fill_outqueue(struct sctp_tcb *stcb,
7610 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7611 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7616 struct sctp_association *asoc;
7617 struct sctp_stream_out *strq;
7618 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7621 SCTP_TCB_LOCK_ASSERT(stcb);
7623 switch (net->ro._l_addr.sa.sa_family) {
7626 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7631 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7636 goal_mtu = net->mtu;
7639 /* Need an allowance for the data chunk header too */
7640 goal_mtu -= sizeof(struct sctp_data_chunk);
7642 /* must make even word boundary */
7643 goal_mtu &= 0xfffffffc;
7644 if (asoc->locked_on_sending) {
7645 /* We are stuck on one stream until the message completes. */
7646 strq = asoc->locked_on_sending;
7649 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7652 while ((goal_mtu > 0) && strq) {
7655 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7656 &giveup, eeor_mode, &bail, so_locked);
7658 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7661 asoc->locked_on_sending = strq;
7662 if ((moved_how_much == 0) || (giveup) || bail)
7663 /* no more to move for now */
7666 asoc->locked_on_sending = NULL;
7667 if ((giveup) || bail) {
7670 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7675 total_moved += moved_how_much;
7676 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7677 goal_mtu &= 0xfffffffc;
7682 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7684 if (total_moved == 0) {
7685 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7686 (net == stcb->asoc.primary_destination)) {
7687 /* ran dry for primary network net */
7688 SCTP_STAT_INCR(sctps_primary_randry);
7689 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7690 /* ran dry with CMT on */
7691 SCTP_STAT_INCR(sctps_cmt_randry);
7697 sctp_fix_ecn_echo(struct sctp_association *asoc)
7699 struct sctp_tmit_chunk *chk;
7701 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7702 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7703 chk->sent = SCTP_DATAGRAM_UNSENT;
7709 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7711 struct sctp_association *asoc;
7712 struct sctp_tmit_chunk *chk;
7713 struct sctp_stream_queue_pending *sp;
7720 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7721 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7722 if (sp->net == net) {
7723 sctp_free_remote_addr(sp->net);
7728 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7729 if (chk->whoTo == net) {
7730 sctp_free_remote_addr(chk->whoTo);
7737 sctp_med_chunk_output(struct sctp_inpcb *inp,
7738 struct sctp_tcb *stcb,
7739 struct sctp_association *asoc,
7742 int control_only, int from_where,
7743 struct timeval *now, int *now_filled, int frag_point, int so_locked
7744 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7750 * Ok this is the generic chunk service queue. we must do the
7751 * following: - Service the stream queue that is next, moving any
7752 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7753 * LAST to the out queue in one pass) and assigning TSN's - Check to
7754 * see if the cwnd/rwnd allows any output, if so we go ahead and
7755 * fomulate and send the low level chunks. Making sure to combine
7756 * any control in the control chunk queue also.
7758 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7759 struct mbuf *outchain, *endoutchain;
7760 struct sctp_tmit_chunk *chk, *nchk;
7762 /* temp arrays for unlinking */
7763 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7764 int no_fragmentflg, error;
7765 unsigned int max_rwnd_per_dest, max_send_per_dest;
7766 int one_chunk, hbflag, skip_data_for_this_net;
7767 int asconf, cookie, no_out_cnt;
7768 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7769 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7771 uint32_t auth_offset = 0;
7772 struct sctp_auth_chunk *auth = NULL;
7773 uint16_t auth_keyid;
7774 int override_ok = 1;
7775 int skip_fill_up = 0;
7776 int data_auth_reqd = 0;
7779 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7786 auth_keyid = stcb->asoc.authinfo.active_keyid;
7787 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7788 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7789 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7794 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7796 * First lets prime the pump. For each destination, if there is room
7797 * in the flight size, attempt to pull an MTU's worth out of the
7798 * stream queues into the general send_queue
7800 #ifdef SCTP_AUDITING_ENABLED
7801 sctp_audit_log(0xC2, 2);
7803 SCTP_TCB_LOCK_ASSERT(stcb);
7810 /* Nothing to possible to send? */
7811 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7812 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7813 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7814 TAILQ_EMPTY(&asoc->send_queue) &&
7815 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7820 if (asoc->peers_rwnd == 0) {
7821 /* No room in peers rwnd */
7823 if (asoc->total_flight > 0) {
7824 /* we are allowed one chunk in flight */
7828 if (stcb->asoc.ecn_echo_cnt_onq) {
7829 /* Record where a sack goes, if any */
7830 if (no_data_chunks &&
7831 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7832 /* Nothing but ECNe to send - we don't do that */
7833 goto nothing_to_send;
7835 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7836 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7837 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7838 sack_goes_to = chk->whoTo;
7843 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7844 if (stcb->sctp_socket)
7845 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7847 max_send_per_dest = 0;
7848 if (no_data_chunks == 0) {
7849 /* How many non-directed chunks are there? */
7850 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7851 if (chk->whoTo == NULL) {
7853 * We already have non-directed chunks on
7854 * the queue, no need to do a fill-up.
7862 if ((no_data_chunks == 0) &&
7863 (skip_fill_up == 0) &&
7864 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7865 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7867 * This for loop we are in takes in each net, if
7868 * its's got space in cwnd and has data sent to it
7869 * (when CMT is off) then it calls
7870 * sctp_fill_outqueue for the net. This gets data on
7871 * the send queue for that network.
7873 * In sctp_fill_outqueue TSN's are assigned and data is
7874 * copied out of the stream buffers. Note mostly
7875 * copy by reference (we hope).
7877 net->window_probe = 0;
7878 if ((net != stcb->asoc.alternate) &&
7879 ((net->dest_state & SCTP_ADDR_PF) ||
7880 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7881 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7882 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7883 sctp_log_cwnd(stcb, net, 1,
7884 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7888 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7889 (net->flight_size == 0)) {
7890 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7892 if (net->flight_size >= net->cwnd) {
7893 /* skip this network, no room - can't fill */
7894 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7895 sctp_log_cwnd(stcb, net, 3,
7896 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7900 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7901 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7903 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7905 /* memory alloc failure */
7911 /* now service each destination and send out what we can for it */
7912 /* Nothing to send? */
7913 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7914 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7915 TAILQ_EMPTY(&asoc->send_queue)) {
7919 if (asoc->sctp_cmt_on_off > 0) {
7920 /* get the last start point */
7921 start_at = asoc->last_net_cmt_send_started;
7922 if (start_at == NULL) {
7923 /* null so to beginning */
7924 start_at = TAILQ_FIRST(&asoc->nets);
7926 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7927 if (start_at == NULL) {
7928 start_at = TAILQ_FIRST(&asoc->nets);
7931 asoc->last_net_cmt_send_started = start_at;
7933 start_at = TAILQ_FIRST(&asoc->nets);
7935 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7936 if (chk->whoTo == NULL) {
7937 if (asoc->alternate) {
7938 chk->whoTo = asoc->alternate;
7940 chk->whoTo = asoc->primary_destination;
7942 atomic_add_int(&chk->whoTo->ref_count, 1);
7945 old_start_at = NULL;
7946 again_one_more_time:
7947 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7948 /* how much can we send? */
7949 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7950 if (old_start_at && (old_start_at == net)) {
7951 /* through list ocmpletely. */
7955 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7956 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7957 (net->flight_size >= net->cwnd)) {
7959 * Nothing on control or asconf and flight is full,
7960 * we can skip even in the CMT case.
7965 endoutchain = outchain = NULL;
7968 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7969 skip_data_for_this_net = 1;
7971 skip_data_for_this_net = 0;
7973 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7975 * if we have a route and an ifp check to see if we
7976 * have room to send to this guy
7980 ifp = net->ro.ro_rt->rt_ifp;
7981 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
7982 SCTP_STAT_INCR(sctps_ifnomemqueued);
7983 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
7984 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
7989 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7992 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7997 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8007 if (mtu > asoc->peers_rwnd) {
8008 if (asoc->total_flight > 0) {
8009 /* We have a packet in flight somewhere */
8010 r_mtu = asoc->peers_rwnd;
8012 /* We are always allowed to send one MTU out */
8020 /************************/
8021 /* ASCONF transmission */
8022 /************************/
8023 /* Now first lets go through the asconf queue */
8024 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8025 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8028 if (chk->whoTo == NULL) {
8029 if (asoc->alternate == NULL) {
8030 if (asoc->primary_destination != net) {
8034 if (asoc->alternate != net) {
8039 if (chk->whoTo != net) {
8043 if (chk->data == NULL) {
8046 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8047 chk->sent != SCTP_DATAGRAM_RESEND) {
8051 * if no AUTH is yet included and this chunk
8052 * requires it, make sure to account for it. We
8053 * don't apply the size until the AUTH chunk is
8054 * actually added below in case there is no room for
8055 * this chunk. NOTE: we overload the use of "omtu"
8058 if ((auth == NULL) &&
8059 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8060 stcb->asoc.peer_auth_chunks)) {
8061 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8064 /* Here we do NOT factor the r_mtu */
8065 if ((chk->send_size < (int)(mtu - omtu)) ||
8066 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8068 * We probably should glom the mbuf chain
8069 * from the chk->data for control but the
8070 * problem is it becomes yet one more level
8071 * of tracking to do if for some reason
8072 * output fails. Then I have got to
8073 * reconstruct the merged control chain.. el
8074 * yucko.. for now we take the easy way and
8078 * Add an AUTH chunk, if chunk requires it
8079 * save the offset into the chain for AUTH
8081 if ((auth == NULL) &&
8082 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8083 stcb->asoc.peer_auth_chunks))) {
8084 outchain = sctp_add_auth_chunk(outchain,
8089 chk->rec.chunk_id.id);
8090 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8092 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8093 (int)chk->rec.chunk_id.can_take_data,
8094 chk->send_size, chk->copy_by_ref);
8095 if (outchain == NULL) {
8097 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8100 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8101 /* update our MTU size */
8102 if (mtu > (chk->send_size + omtu))
8103 mtu -= (chk->send_size + omtu);
8106 to_out += (chk->send_size + omtu);
8107 /* Do clear IP_DF ? */
8108 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8111 if (chk->rec.chunk_id.can_take_data)
8114 * set hb flag since we can use these for
8120 * should sysctl this: don't bundle data
8121 * with ASCONF since it requires AUTH
8124 chk->sent = SCTP_DATAGRAM_SENT;
8125 if (chk->whoTo == NULL) {
8127 atomic_add_int(&net->ref_count, 1);
8132 * Ok we are out of room but we can
8133 * output without effecting the
8134 * flight size since this little guy
8135 * is a control only packet.
8137 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8139 * do NOT clear the asconf flag as
8140 * it is used to do appropriate
8141 * source address selection.
8143 if (*now_filled == 0) {
8144 (void)SCTP_GETTIME_TIMEVAL(now);
8147 net->last_sent_time = *now;
8149 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8150 (struct sockaddr *)&net->ro._l_addr,
8151 outchain, auth_offset, auth,
8152 stcb->asoc.authinfo.active_keyid,
8153 no_fragmentflg, 0, asconf,
8154 inp->sctp_lport, stcb->rport,
8155 htonl(stcb->asoc.peer_vtag),
8160 * error, we could not
8163 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8164 if (from_where == 0) {
8165 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8167 if (error == ENOBUFS) {
8168 asoc->ifp_had_enobuf = 1;
8169 SCTP_STAT_INCR(sctps_lowlevelerr);
8171 /* error, could not output */
8172 if (error == EHOSTUNREACH) {
8178 sctp_move_chunks_from_net(stcb, net);
8183 asoc->ifp_had_enobuf = 0;
8186 * increase the number we sent, if a
8187 * cookie is sent we don't tell them
8190 outchain = endoutchain = NULL;
8194 *num_out += ctl_cnt;
8195 /* recalc a clean slate and setup */
8196 switch (net->ro._l_addr.sa.sa_family) {
8199 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8204 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8221 /************************/
8222 /* Control transmission */
8223 /************************/
8224 /* Now first lets go through the control queue */
8225 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8226 if ((sack_goes_to) &&
8227 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8228 (chk->whoTo != sack_goes_to)) {
8230 * if we have a sack in queue, and we are
8231 * looking at an ecn echo that is NOT queued
8232 * to where the sack is going..
8234 if (chk->whoTo == net) {
8236 * Don't transmit it to where its
8237 * going (current net)
8240 } else if (sack_goes_to == net) {
8242 * But do transmit it to this
8245 goto skip_net_check;
8248 if (chk->whoTo == NULL) {
8249 if (asoc->alternate == NULL) {
8250 if (asoc->primary_destination != net) {
8254 if (asoc->alternate != net) {
8259 if (chk->whoTo != net) {
8264 if (chk->data == NULL) {
8267 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8269 * It must be unsent. Cookies and ASCONF's
8270 * hang around but there timers will force
8271 * when marked for resend.
8276 * if no AUTH is yet included and this chunk
8277 * requires it, make sure to account for it. We
8278 * don't apply the size until the AUTH chunk is
8279 * actually added below in case there is no room for
8280 * this chunk. NOTE: we overload the use of "omtu"
8283 if ((auth == NULL) &&
8284 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8285 stcb->asoc.peer_auth_chunks)) {
8286 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8289 /* Here we do NOT factor the r_mtu */
8290 if ((chk->send_size <= (int)(mtu - omtu)) ||
8291 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8293 * We probably should glom the mbuf chain
8294 * from the chk->data for control but the
8295 * problem is it becomes yet one more level
8296 * of tracking to do if for some reason
8297 * output fails. Then I have got to
8298 * reconstruct the merged control chain.. el
8299 * yucko.. for now we take the easy way and
8303 * Add an AUTH chunk, if chunk requires it
8304 * save the offset into the chain for AUTH
8306 if ((auth == NULL) &&
8307 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8308 stcb->asoc.peer_auth_chunks))) {
8309 outchain = sctp_add_auth_chunk(outchain,
8314 chk->rec.chunk_id.id);
8315 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8317 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8318 (int)chk->rec.chunk_id.can_take_data,
8319 chk->send_size, chk->copy_by_ref);
8320 if (outchain == NULL) {
8322 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8325 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8326 /* update our MTU size */
8327 if (mtu > (chk->send_size + omtu))
8328 mtu -= (chk->send_size + omtu);
8331 to_out += (chk->send_size + omtu);
8332 /* Do clear IP_DF ? */
8333 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8336 if (chk->rec.chunk_id.can_take_data)
8338 /* Mark things to be removed, if needed */
8339 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8340 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8341 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8342 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8343 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8344 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8345 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8346 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8347 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8348 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8349 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8350 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8353 /* remove these chunks at the end */
8354 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8355 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8356 /* turn off the timer */
8357 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8358 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8360 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8366 * Other chunks, since they have
8367 * timers running (i.e. COOKIE) we
8368 * just "trust" that it gets sent or
8372 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8375 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8377 * Increment ecne send count
8378 * here this means we may be
8379 * over-zealous in our
8380 * counting if the send
8381 * fails, but its the best
8382 * place to do it (we used
8383 * to do it in the queue of
8384 * the chunk, but that did
8385 * not tell how many times
8388 SCTP_STAT_INCR(sctps_sendecne);
8390 chk->sent = SCTP_DATAGRAM_SENT;
8391 if (chk->whoTo == NULL) {
8393 atomic_add_int(&net->ref_count, 1);
8399 * Ok we are out of room but we can
8400 * output without effecting the
8401 * flight size since this little guy
8402 * is a control only packet.
8405 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8407 * do NOT clear the asconf
8408 * flag as it is used to do
8409 * appropriate source
8410 * address selection.
8414 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8417 /* Only HB or ASCONF advances time */
8419 if (*now_filled == 0) {
8420 (void)SCTP_GETTIME_TIMEVAL(now);
8423 net->last_sent_time = *now;
8426 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8427 (struct sockaddr *)&net->ro._l_addr,
8430 stcb->asoc.authinfo.active_keyid,
8431 no_fragmentflg, 0, asconf,
8432 inp->sctp_lport, stcb->rport,
8433 htonl(stcb->asoc.peer_vtag),
8438 * error, we could not
8441 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8442 if (from_where == 0) {
8443 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8445 if (error == ENOBUFS) {
8446 asoc->ifp_had_enobuf = 1;
8447 SCTP_STAT_INCR(sctps_lowlevelerr);
8449 if (error == EHOSTUNREACH) {
8455 sctp_move_chunks_from_net(stcb, net);
8460 asoc->ifp_had_enobuf = 0;
8463 * increase the number we sent, if a
8464 * cookie is sent we don't tell them
8467 outchain = endoutchain = NULL;
8471 *num_out += ctl_cnt;
8472 /* recalc a clean slate and setup */
8473 switch (net->ro._l_addr.sa.sa_family) {
8476 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8481 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8498 /* JRI: if dest is in PF state, do not send data to it */
8499 if ((asoc->sctp_cmt_on_off > 0) &&
8500 (net != stcb->asoc.alternate) &&
8501 (net->dest_state & SCTP_ADDR_PF)) {
8504 if (net->flight_size >= net->cwnd) {
8507 if ((asoc->sctp_cmt_on_off > 0) &&
8508 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8509 (net->flight_size > max_rwnd_per_dest)) {
8513 * We need a specific accounting for the usage of the send
8514 * buffer. We also need to check the number of messages per
8515 * net. For now, this is better than nothing and it disabled
8518 if ((asoc->sctp_cmt_on_off > 0) &&
8519 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8520 (max_send_per_dest > 0) &&
8521 (net->flight_size > max_send_per_dest)) {
8524 /*********************/
8525 /* Data transmission */
8526 /*********************/
8528 * if AUTH for DATA is required and no AUTH has been added
8529 * yet, account for this in the mtu now... if no data can be
8530 * bundled, this adjustment won't matter anyways since the
8531 * packet will be going out...
8533 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8534 stcb->asoc.peer_auth_chunks);
8535 if (data_auth_reqd && (auth == NULL)) {
8536 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8538 /* now lets add any data within the MTU constraints */
8539 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8542 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8543 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8550 if (net->mtu > SCTP_MIN_OVERHEAD)
8551 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8561 if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
8562 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8563 (skip_data_for_this_net == 0)) ||
8565 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8566 if (no_data_chunks) {
8567 /* let only control go out */
8571 if (net->flight_size >= net->cwnd) {
8572 /* skip this net, no room for data */
8576 if ((chk->whoTo != NULL) &&
8577 (chk->whoTo != net)) {
8578 /* Don't send the chunk on this net */
8581 if (asoc->sctp_cmt_on_off == 0) {
8582 if ((asoc->alternate) &&
8583 (asoc->alternate != net) &&
8584 (chk->whoTo == NULL)) {
8586 } else if ((net != asoc->primary_destination) &&
8587 (asoc->alternate == NULL) &&
8588 (chk->whoTo == NULL)) {
8592 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8594 * strange, we have a chunk that is
8595 * to big for its destination and
8596 * yet no fragment ok flag.
8597 * Something went wrong when the
8598 * PMTU changed...we did not mark
8599 * this chunk for some reason?? I
8600 * will fix it here by letting IP
8601 * fragment it for now and printing
8602 * a warning. This really should not
8605 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8606 chk->send_size, mtu);
8607 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8609 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8610 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8611 struct sctp_data_chunk *dchkh;
8613 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8614 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8616 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8617 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8618 /* ok we will add this one */
8621 * Add an AUTH chunk, if chunk
8622 * requires it, save the offset into
8623 * the chain for AUTH
8625 if (data_auth_reqd) {
8627 outchain = sctp_add_auth_chunk(outchain,
8633 auth_keyid = chk->auth_keyid;
8635 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8636 } else if (override_ok) {
8641 auth_keyid = chk->auth_keyid;
8643 } else if (auth_keyid != chk->auth_keyid) {
8651 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8652 chk->send_size, chk->copy_by_ref);
8653 if (outchain == NULL) {
8654 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8655 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8656 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8659 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8662 /* upate our MTU size */
8663 /* Do clear IP_DF ? */
8664 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8667 /* unsigned subtraction of mtu */
8668 if (mtu > chk->send_size)
8669 mtu -= chk->send_size;
8672 /* unsigned subtraction of r_mtu */
8673 if (r_mtu > chk->send_size)
8674 r_mtu -= chk->send_size;
8678 to_out += chk->send_size;
8679 if ((to_out > mx_mtu) && no_fragmentflg) {
8681 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8683 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8687 chk->window_probe = 0;
8688 data_list[bundle_at++] = chk;
8689 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8692 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8693 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8694 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8696 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8698 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8699 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8709 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8711 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8712 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8713 data_list[0]->window_probe = 1;
8714 net->window_probe = 1;
8720 * Must be sent in order of the
8721 * TSN's (on a network)
8725 } /* for (chunk gather loop for this net) */
8726 } /* if asoc.state OPEN */
8728 /* Is there something to send for this destination? */
8730 /* We may need to start a control timer or two */
8732 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8735 * do NOT clear the asconf flag as it is
8736 * used to do appropriate source address
8741 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8744 /* must start a send timer if data is being sent */
8745 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8747 * no timer running on this destination
8750 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8752 if (bundle_at || hbflag) {
8753 /* For data/asconf and hb set time */
8754 if (*now_filled == 0) {
8755 (void)SCTP_GETTIME_TIMEVAL(now);
8758 net->last_sent_time = *now;
8760 /* Now send it, if there is anything to send :> */
8761 if ((error = sctp_lowlevel_chunk_output(inp,
8764 (struct sockaddr *)&net->ro._l_addr,
8772 inp->sctp_lport, stcb->rport,
8773 htonl(stcb->asoc.peer_vtag),
8777 /* error, we could not output */
8778 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8779 if (from_where == 0) {
8780 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8782 if (error == ENOBUFS) {
8783 SCTP_STAT_INCR(sctps_lowlevelerr);
8784 asoc->ifp_had_enobuf = 1;
8786 if (error == EHOSTUNREACH) {
8788 * Destination went unreachable
8791 sctp_move_chunks_from_net(stcb, net);
8795 * I add this line to be paranoid. As far as
8796 * I can tell the continue, takes us back to
8797 * the top of the for, but just to make sure
8798 * I will reset these again here.
8800 ctl_cnt = bundle_at = 0;
8801 continue; /* This takes us back to the
8802 * for() for the nets. */
8804 asoc->ifp_had_enobuf = 0;
8810 *num_out += (ctl_cnt + bundle_at);
8813 /* setup for a RTO measurement */
8814 tsns_sent = data_list[0]->rec.data.TSN_seq;
8815 /* fill time if not already filled */
8816 if (*now_filled == 0) {
8817 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8819 *now = asoc->time_last_sent;
8821 asoc->time_last_sent = *now;
8823 if (net->rto_needed) {
8824 data_list[0]->do_rtt = 1;
8825 net->rto_needed = 0;
8827 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8828 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8834 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8835 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8838 if (old_start_at == NULL) {
8839 old_start_at = start_at;
8840 start_at = TAILQ_FIRST(&asoc->nets);
8842 goto again_one_more_time;
8845 * At the end there should be no NON timed chunks hanging on this
8848 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8849 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8851 if ((*num_out == 0) && (*reason_code == 0)) {
8856 sctp_clean_up_ctl(stcb, asoc, so_locked);
8861 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8864 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8865 * the control chunk queue.
8867 struct sctp_chunkhdr *hdr;
8868 struct sctp_tmit_chunk *chk;
8869 struct mbuf *mat, *last_mbuf;
8870 uint32_t chunk_length;
8871 uint16_t padding_length;
8873 SCTP_TCB_LOCK_ASSERT(stcb);
8874 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8875 if (op_err == NULL) {
8880 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8881 chunk_length += SCTP_BUF_LEN(mat);
8882 if (SCTP_BUF_NEXT(mat) == NULL) {
8886 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8887 sctp_m_freem(op_err);
8890 padding_length = chunk_length % 4;
8891 if (padding_length != 0) {
8892 padding_length = 4 - padding_length;
8894 if (padding_length != 0) {
8895 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8896 sctp_m_freem(op_err);
8900 sctp_alloc_a_chunk(stcb, chk);
8903 sctp_m_freem(op_err);
8906 chk->copy_by_ref = 0;
8907 chk->send_size = (uint16_t) chunk_length;
8908 chk->sent = SCTP_DATAGRAM_UNSENT;
8910 chk->asoc = &stcb->asoc;
8913 hdr = mtod(op_err, struct sctp_chunkhdr *);
8914 hdr->chunk_type = SCTP_OPERATION_ERROR;
8915 hdr->chunk_flags = 0;
8916 hdr->chunk_length = htons(chk->send_size);
8917 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8918 chk->asoc->ctrl_queue_cnt++;
8922 sctp_send_cookie_echo(struct mbuf *m,
8924 struct sctp_tcb *stcb,
8925 struct sctp_nets *net)
8928 * pull out the cookie and put it at the front of the control chunk
8932 struct mbuf *cookie;
8933 struct sctp_paramhdr parm, *phdr;
8934 struct sctp_chunkhdr *hdr;
8935 struct sctp_tmit_chunk *chk;
8936 uint16_t ptype, plen;
8938 SCTP_TCB_LOCK_ASSERT(stcb);
8939 /* First find the cookie in the param area */
8941 at = offset + sizeof(struct sctp_init_chunk);
8943 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8947 ptype = ntohs(phdr->param_type);
8948 plen = ntohs(phdr->param_length);
8949 if (ptype == SCTP_STATE_COOKIE) {
8952 /* found the cookie */
8953 if ((pad = (plen % 4))) {
8956 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
8957 if (cookie == NULL) {
8961 #ifdef SCTP_MBUF_LOGGING
8962 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8963 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
8968 at += SCTP_SIZE32(plen);
8970 /* ok, we got the cookie lets change it into a cookie echo chunk */
8971 /* first the change from param to cookie */
8972 hdr = mtod(cookie, struct sctp_chunkhdr *);
8973 hdr->chunk_type = SCTP_COOKIE_ECHO;
8974 hdr->chunk_flags = 0;
8975 /* get the chunk stuff now and place it in the FRONT of the queue */
8976 sctp_alloc_a_chunk(stcb, chk);
8979 sctp_m_freem(cookie);
8982 chk->copy_by_ref = 0;
8983 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8984 chk->rec.chunk_id.can_take_data = 0;
8985 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8986 chk->send_size = plen;
8987 chk->sent = SCTP_DATAGRAM_UNSENT;
8989 chk->asoc = &stcb->asoc;
8992 atomic_add_int(&chk->whoTo->ref_count, 1);
8993 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8994 chk->asoc->ctrl_queue_cnt++;
8999 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9003 struct sctp_nets *net)
9006 * take a HB request and make it into a HB ack and send it.
9008 struct mbuf *outchain;
9009 struct sctp_chunkhdr *chdr;
9010 struct sctp_tmit_chunk *chk;
9014 /* must have a net pointer */
9017 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9018 if (outchain == NULL) {
9019 /* gak out of memory */
9022 #ifdef SCTP_MBUF_LOGGING
9023 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9024 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9027 chdr = mtod(outchain, struct sctp_chunkhdr *);
9028 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9029 chdr->chunk_flags = 0;
9030 if (chk_length % 4) {
9032 uint32_t cpthis = 0;
9035 padlen = 4 - (chk_length % 4);
9036 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9038 sctp_alloc_a_chunk(stcb, chk);
9041 sctp_m_freem(outchain);
9044 chk->copy_by_ref = 0;
9045 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9046 chk->rec.chunk_id.can_take_data = 1;
9048 chk->send_size = chk_length;
9049 chk->sent = SCTP_DATAGRAM_UNSENT;
9051 chk->asoc = &stcb->asoc;
9052 chk->data = outchain;
9054 atomic_add_int(&chk->whoTo->ref_count, 1);
9055 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9056 chk->asoc->ctrl_queue_cnt++;
9060 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9062 /* formulate and queue a cookie-ack back to sender */
9063 struct mbuf *cookie_ack;
9064 struct sctp_chunkhdr *hdr;
9065 struct sctp_tmit_chunk *chk;
9067 SCTP_TCB_LOCK_ASSERT(stcb);
9069 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9070 if (cookie_ack == NULL) {
9074 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9075 sctp_alloc_a_chunk(stcb, chk);
9078 sctp_m_freem(cookie_ack);
9081 chk->copy_by_ref = 0;
9082 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9083 chk->rec.chunk_id.can_take_data = 1;
9085 chk->send_size = sizeof(struct sctp_chunkhdr);
9086 chk->sent = SCTP_DATAGRAM_UNSENT;
9088 chk->asoc = &stcb->asoc;
9089 chk->data = cookie_ack;
9090 if (chk->asoc->last_control_chunk_from != NULL) {
9091 chk->whoTo = chk->asoc->last_control_chunk_from;
9092 atomic_add_int(&chk->whoTo->ref_count, 1);
9096 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9097 hdr->chunk_type = SCTP_COOKIE_ACK;
9098 hdr->chunk_flags = 0;
9099 hdr->chunk_length = htons(chk->send_size);
9100 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9101 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9102 chk->asoc->ctrl_queue_cnt++;
9108 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9110 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9111 struct mbuf *m_shutdown_ack;
9112 struct sctp_shutdown_ack_chunk *ack_cp;
9113 struct sctp_tmit_chunk *chk;
9115 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9116 if (m_shutdown_ack == NULL) {
9120 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9121 sctp_alloc_a_chunk(stcb, chk);
9124 sctp_m_freem(m_shutdown_ack);
9127 chk->copy_by_ref = 0;
9128 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9129 chk->rec.chunk_id.can_take_data = 1;
9131 chk->send_size = sizeof(struct sctp_chunkhdr);
9132 chk->sent = SCTP_DATAGRAM_UNSENT;
9135 chk->asoc = &stcb->asoc;
9136 chk->data = m_shutdown_ack;
9139 atomic_add_int(&chk->whoTo->ref_count, 1);
9141 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9142 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9143 ack_cp->ch.chunk_flags = 0;
9144 ack_cp->ch.chunk_length = htons(chk->send_size);
9145 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9146 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9147 chk->asoc->ctrl_queue_cnt++;
9152 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9154 /* formulate and queue a SHUTDOWN to the sender */
9155 struct mbuf *m_shutdown;
9156 struct sctp_shutdown_chunk *shutdown_cp;
9157 struct sctp_tmit_chunk *chk;
9159 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9160 if (m_shutdown == NULL) {
9164 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9165 sctp_alloc_a_chunk(stcb, chk);
9168 sctp_m_freem(m_shutdown);
9171 chk->copy_by_ref = 0;
9172 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9173 chk->rec.chunk_id.can_take_data = 1;
9175 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9176 chk->sent = SCTP_DATAGRAM_UNSENT;
9179 chk->asoc = &stcb->asoc;
9180 chk->data = m_shutdown;
9183 atomic_add_int(&chk->whoTo->ref_count, 1);
9185 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9186 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9187 shutdown_cp->ch.chunk_flags = 0;
9188 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9189 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9190 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9191 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9192 chk->asoc->ctrl_queue_cnt++;
9197 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9200 * formulate and queue an ASCONF to the peer. ASCONF parameters
9201 * should be queued on the assoc queue.
9203 struct sctp_tmit_chunk *chk;
9204 struct mbuf *m_asconf;
9207 SCTP_TCB_LOCK_ASSERT(stcb);
9209 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9210 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9211 /* can't send a new one if there is one in flight already */
9214 /* compose an ASCONF chunk, maximum length is PMTU */
9215 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9216 if (m_asconf == NULL) {
9219 sctp_alloc_a_chunk(stcb, chk);
9222 sctp_m_freem(m_asconf);
9225 chk->copy_by_ref = 0;
9226 chk->rec.chunk_id.id = SCTP_ASCONF;
9227 chk->rec.chunk_id.can_take_data = 0;
9228 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9229 chk->data = m_asconf;
9230 chk->send_size = len;
9231 chk->sent = SCTP_DATAGRAM_UNSENT;
9233 chk->asoc = &stcb->asoc;
9236 atomic_add_int(&chk->whoTo->ref_count, 1);
9238 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9239 chk->asoc->ctrl_queue_cnt++;
9244 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9247 * formulate and queue a asconf-ack back to sender. the asconf-ack
9248 * must be stored in the tcb.
9250 struct sctp_tmit_chunk *chk;
9251 struct sctp_asconf_ack *ack, *latest_ack;
9253 struct sctp_nets *net = NULL;
9255 SCTP_TCB_LOCK_ASSERT(stcb);
9256 /* Get the latest ASCONF-ACK */
9257 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9258 if (latest_ack == NULL) {
9261 if (latest_ack->last_sent_to != NULL &&
9262 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9263 /* we're doing a retransmission */
9264 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9267 if (stcb->asoc.last_control_chunk_from == NULL) {
9268 if (stcb->asoc.alternate) {
9269 net = stcb->asoc.alternate;
9271 net = stcb->asoc.primary_destination;
9274 net = stcb->asoc.last_control_chunk_from;
9279 if (stcb->asoc.last_control_chunk_from == NULL) {
9280 if (stcb->asoc.alternate) {
9281 net = stcb->asoc.alternate;
9283 net = stcb->asoc.primary_destination;
9286 net = stcb->asoc.last_control_chunk_from;
9289 latest_ack->last_sent_to = net;
9291 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9292 if (ack->data == NULL) {
9295 /* copy the asconf_ack */
9296 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9297 if (m_ack == NULL) {
9298 /* couldn't copy it */
9301 #ifdef SCTP_MBUF_LOGGING
9302 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9303 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9307 sctp_alloc_a_chunk(stcb, chk);
9311 sctp_m_freem(m_ack);
9314 chk->copy_by_ref = 0;
9315 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9316 chk->rec.chunk_id.can_take_data = 1;
9317 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9320 atomic_add_int(&chk->whoTo->ref_count, 1);
9323 chk->send_size = ack->len;
9324 chk->sent = SCTP_DATAGRAM_UNSENT;
9326 chk->asoc = &stcb->asoc;
9328 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9329 chk->asoc->ctrl_queue_cnt++;
9336 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9337 struct sctp_tcb *stcb,
9338 struct sctp_association *asoc,
9339 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9340 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9346 * send out one MTU of retransmission. If fast_retransmit is
9347 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9348 * rwnd. For a Cookie or Asconf in the control chunk queue we
9349 * retransmit them by themselves.
9351 * For data chunks we will pick out the lowest TSN's in the sent_queue
9352 * marked for resend and bundle them all together (up to a MTU of
9353 * destination). The address to send to should have been
9354 * selected/changed where the retransmission was marked (i.e. in FR
9355 * or t3-timeout routines).
9357 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9358 struct sctp_tmit_chunk *chk, *fwd;
9359 struct mbuf *m, *endofchain;
9360 struct sctp_nets *net = NULL;
9361 uint32_t tsns_sent = 0;
9362 int no_fragmentflg, bundle_at, cnt_thru;
9364 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9365 struct sctp_auth_chunk *auth = NULL;
9366 uint32_t auth_offset = 0;
9367 uint16_t auth_keyid;
9368 int override_ok = 1;
9369 int data_auth_reqd = 0;
9372 SCTP_TCB_LOCK_ASSERT(stcb);
9373 tmr_started = ctl_cnt = bundle_at = error = 0;
9378 endofchain = m = NULL;
9379 auth_keyid = stcb->asoc.authinfo.active_keyid;
9380 #ifdef SCTP_AUDITING_ENABLED
9381 sctp_audit_log(0xC3, 1);
9383 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9384 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9385 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9386 asoc->sent_queue_retran_cnt);
9387 asoc->sent_queue_cnt = 0;
9388 asoc->sent_queue_cnt_removeable = 0;
9389 /* send back 0/0 so we enter normal transmission */
9393 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9394 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9395 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9396 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9397 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9400 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9401 if (chk != asoc->str_reset) {
9403 * not eligible for retran if its
9410 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9414 * Add an AUTH chunk, if chunk requires it save the
9415 * offset into the chain for AUTH
9417 if ((auth == NULL) &&
9418 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9419 stcb->asoc.peer_auth_chunks))) {
9420 m = sctp_add_auth_chunk(m, &endofchain,
9421 &auth, &auth_offset,
9423 chk->rec.chunk_id.id);
9424 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9426 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9432 /* do we have control chunks to retransmit? */
9434 /* Start a timer no matter if we suceed or fail */
9435 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9436 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9437 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9438 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9439 chk->snd_count++; /* update our count */
9440 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9441 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9442 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9443 no_fragmentflg, 0, 0,
9444 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9445 chk->whoTo->port, NULL,
9448 SCTP_STAT_INCR(sctps_lowlevelerr);
9455 * We don't want to mark the net->sent time here since this
9456 * we use this for HB and retrans cannot measure RTT
9458 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9460 chk->sent = SCTP_DATAGRAM_SENT;
9461 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9465 /* Clean up the fwd-tsn list */
9466 sctp_clean_up_ctl(stcb, asoc, so_locked);
9471 * Ok, it is just data retransmission we need to do or that and a
9472 * fwd-tsn with it all.
9474 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9475 return (SCTP_RETRAN_DONE);
9477 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9478 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9479 /* not yet open, resend the cookie and that is it */
9482 #ifdef SCTP_AUDITING_ENABLED
9483 sctp_auditing(20, inp, stcb, NULL);
9485 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9486 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9487 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9488 /* No, not sent to this net or not ready for rtx */
9491 if (chk->data == NULL) {
9492 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9493 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9496 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9497 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9498 struct mbuf *op_err;
9499 char msg[SCTP_DIAG_INFO_LEN];
9501 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9502 chk->rec.data.TSN_seq, chk->snd_count);
9503 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9505 atomic_add_int(&stcb->asoc.refcnt, 1);
9506 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9508 SCTP_TCB_LOCK(stcb);
9509 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9510 return (SCTP_RETRAN_EXIT);
9512 /* pick up the net */
9514 switch (net->ro._l_addr.sa.sa_family) {
9517 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9522 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9531 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9532 /* No room in peers rwnd */
9535 tsn = asoc->last_acked_seq + 1;
9536 if (tsn == chk->rec.data.TSN_seq) {
9538 * we make a special exception for this
9539 * case. The peer has no rwnd but is missing
9540 * the lowest chunk.. which is probably what
9541 * is holding up the rwnd.
9543 goto one_chunk_around;
9548 if (asoc->peers_rwnd < mtu) {
9550 if ((asoc->peers_rwnd == 0) &&
9551 (asoc->total_flight == 0)) {
9552 chk->window_probe = 1;
9553 chk->whoTo->window_probe = 1;
9556 #ifdef SCTP_AUDITING_ENABLED
9557 sctp_audit_log(0xC3, 2);
9561 net->fast_retran_ip = 0;
9562 if (chk->rec.data.doing_fast_retransmit == 0) {
9564 * if no FR in progress skip destination that have
9565 * flight_size > cwnd.
9567 if (net->flight_size >= net->cwnd) {
9572 * Mark the destination net to have FR recovery
9576 net->fast_retran_ip = 1;
9580 * if no AUTH is yet included and this chunk requires it,
9581 * make sure to account for it. We don't apply the size
9582 * until the AUTH chunk is actually added below in case
9583 * there is no room for this chunk.
9585 if (data_auth_reqd && (auth == NULL)) {
9586 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9590 if ((chk->send_size <= (mtu - dmtu)) ||
9591 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9592 /* ok we will add this one */
9593 if (data_auth_reqd) {
9595 m = sctp_add_auth_chunk(m,
9601 auth_keyid = chk->auth_keyid;
9603 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9604 } else if (override_ok) {
9605 auth_keyid = chk->auth_keyid;
9607 } else if (chk->auth_keyid != auth_keyid) {
9608 /* different keyid, so done bundling */
9612 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9614 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9617 /* Do clear IP_DF ? */
9618 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9621 /* upate our MTU size */
9622 if (mtu > (chk->send_size + dmtu))
9623 mtu -= (chk->send_size + dmtu);
9626 data_list[bundle_at++] = chk;
9627 if (one_chunk && (asoc->total_flight <= 0)) {
9628 SCTP_STAT_INCR(sctps_windowprobed);
9631 if (one_chunk == 0) {
9633 * now are there anymore forward from chk to pick
9636 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9637 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9638 /* Nope, not for retran */
9641 if (fwd->whoTo != net) {
9642 /* Nope, not the net in question */
9645 if (data_auth_reqd && (auth == NULL)) {
9646 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9649 if (fwd->send_size <= (mtu - dmtu)) {
9650 if (data_auth_reqd) {
9652 m = sctp_add_auth_chunk(m,
9658 auth_keyid = fwd->auth_keyid;
9660 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9661 } else if (override_ok) {
9662 auth_keyid = fwd->auth_keyid;
9664 } else if (fwd->auth_keyid != auth_keyid) {
9672 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9674 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9677 /* Do clear IP_DF ? */
9678 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9681 /* upate our MTU size */
9682 if (mtu > (fwd->send_size + dmtu))
9683 mtu -= (fwd->send_size + dmtu);
9686 data_list[bundle_at++] = fwd;
9687 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9691 /* can't fit so we are done */
9696 /* Is there something to send for this destination? */
9699 * No matter if we fail/or suceed we should start a
9700 * timer. A failure is like a lost IP packet :-)
9702 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9704 * no timer running on this destination
9707 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9710 /* Now lets send it, if there is anything to send :> */
9711 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9712 (struct sockaddr *)&net->ro._l_addr, m,
9713 auth_offset, auth, auth_keyid,
9714 no_fragmentflg, 0, 0,
9715 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9719 /* error, we could not output */
9720 SCTP_STAT_INCR(sctps_lowlevelerr);
9728 * We don't want to mark the net->sent time here
9729 * since this we use this for HB and retrans cannot
9732 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9734 /* For auto-close */
9736 if (*now_filled == 0) {
9737 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9738 *now = asoc->time_last_sent;
9741 asoc->time_last_sent = *now;
9743 *cnt_out += bundle_at;
9744 #ifdef SCTP_AUDITING_ENABLED
9745 sctp_audit_log(0xC4, bundle_at);
9748 tsns_sent = data_list[0]->rec.data.TSN_seq;
9750 for (i = 0; i < bundle_at; i++) {
9751 SCTP_STAT_INCR(sctps_sendretransdata);
9752 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9754 * When we have a revoked data, and we
9755 * retransmit it, then we clear the revoked
9756 * flag since this flag dictates if we
9757 * subtracted from the fs
9759 if (data_list[i]->rec.data.chunk_was_revoked) {
9760 /* Deflate the cwnd */
9761 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9762 data_list[i]->rec.data.chunk_was_revoked = 0;
9764 data_list[i]->snd_count++;
9765 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9766 /* record the time */
9767 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9768 if (data_list[i]->book_size_scale) {
9770 * need to double the book size on
9773 data_list[i]->book_size_scale = 0;
9775 * Since we double the booksize, we
9776 * must also double the output queue
9777 * size, since this get shrunk when
9778 * we free by this amount.
9780 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9781 data_list[i]->book_size *= 2;
9785 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9786 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9787 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9789 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9790 (uint32_t) (data_list[i]->send_size +
9791 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9793 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9794 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9795 data_list[i]->whoTo->flight_size,
9796 data_list[i]->book_size,
9797 (uintptr_t) data_list[i]->whoTo,
9798 data_list[i]->rec.data.TSN_seq);
9800 sctp_flight_size_increase(data_list[i]);
9801 sctp_total_flight_increase(stcb, data_list[i]);
9802 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9803 /* SWS sender side engages */
9804 asoc->peers_rwnd = 0;
9807 (data_list[i]->rec.data.doing_fast_retransmit)) {
9808 SCTP_STAT_INCR(sctps_sendfastretrans);
9809 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9810 (tmr_started == 0)) {
9812 * ok we just fast-retrans'd
9813 * the lowest TSN, i.e the
9814 * first on the list. In
9815 * this case we want to give
9816 * some more time to get a
9817 * SACK back without a
9820 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9821 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9822 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9826 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9827 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9829 #ifdef SCTP_AUDITING_ENABLED
9830 sctp_auditing(21, inp, stcb, NULL);
9836 if (asoc->sent_queue_retran_cnt <= 0) {
9837 /* all done we have no more to retran */
9838 asoc->sent_queue_retran_cnt = 0;
9842 /* No more room in rwnd */
9845 /* stop the for loop here. we sent out a packet */
9852 sctp_timer_validation(struct sctp_inpcb *inp,
9853 struct sctp_tcb *stcb,
9854 struct sctp_association *asoc)
9856 struct sctp_nets *net;
9858 /* Validate that a timer is running somewhere */
9859 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9860 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9861 /* Here is a timer */
9865 SCTP_TCB_LOCK_ASSERT(stcb);
9866 /* Gak, we did not have a timer somewhere */
9867 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9868 if (asoc->alternate) {
9869 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9871 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9877 sctp_chunk_output(struct sctp_inpcb *inp,
9878 struct sctp_tcb *stcb,
9881 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9887 * Ok this is the generic chunk service queue. we must do the
9889 * - See if there are retransmits pending, if so we must
9891 * - Service the stream queue that is next, moving any
9892 * message (note I must get a complete message i.e.
9893 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9895 * - Check to see if the cwnd/rwnd allows any output, if so we
9896 * go ahead and fomulate and send the low level chunks. Making sure
9897 * to combine any control in the control chunk queue also.
9899 struct sctp_association *asoc;
9900 struct sctp_nets *net;
9901 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9902 unsigned int burst_cnt = 0;
9906 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9909 unsigned int tot_frs = 0;
9913 /* The Nagle algorithm is only applied when handling a send call. */
9914 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9915 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9923 SCTP_TCB_LOCK_ASSERT(stcb);
9925 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9927 if ((un_sent <= 0) &&
9928 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9929 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9930 (asoc->sent_queue_retran_cnt == 0) &&
9931 (asoc->trigger_reset == 0)) {
9932 /* Nothing to do unless there is something to be sent left */
9936 * Do we have something to send, data or control AND a sack timer
9937 * running, if so piggy-back the sack.
9939 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9940 sctp_send_sack(stcb, so_locked);
9941 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9943 while (asoc->sent_queue_retran_cnt) {
9945 * Ok, it is retransmission time only, we send out only ONE
9946 * packet with a single call off to the retran code.
9948 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9950 * Special hook for handling cookiess discarded
9951 * by peer that carried data. Send cookie-ack only
9952 * and then the next call with get the retran's.
9954 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9956 &now, &now_filled, frag_point, so_locked);
9958 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9959 /* if its not from a HB then do it */
9961 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9967 * its from any other place, we don't allow retran
9968 * output (only control)
9973 /* Can't send anymore */
9975 * now lets push out control by calling med-level
9976 * output once. this assures that we WILL send HB's
9979 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9981 &now, &now_filled, frag_point, so_locked);
9982 #ifdef SCTP_AUDITING_ENABLED
9983 sctp_auditing(8, inp, stcb, NULL);
9985 sctp_timer_validation(inp, stcb, asoc);
9990 * The count was off.. retran is not happening so do
9991 * the normal retransmission.
9993 #ifdef SCTP_AUDITING_ENABLED
9994 sctp_auditing(9, inp, stcb, NULL);
9996 if (ret == SCTP_RETRAN_EXIT) {
10001 if (from_where == SCTP_OUTPUT_FROM_T3) {
10002 /* Only one transmission allowed out of a timeout */
10003 #ifdef SCTP_AUDITING_ENABLED
10004 sctp_auditing(10, inp, stcb, NULL);
10006 /* Push out any control */
10007 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10008 &now, &now_filled, frag_point, so_locked);
10011 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10012 /* Hit FR burst limit */
10015 if ((num_out == 0) && (ret == 0)) {
10016 /* No more retrans to send */
10020 #ifdef SCTP_AUDITING_ENABLED
10021 sctp_auditing(12, inp, stcb, NULL);
10023 /* Check for bad destinations, if they exist move chunks around. */
10024 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10025 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10027 * if possible move things off of this address we
10028 * still may send below due to the dormant state but
10029 * we try to find an alternate address to send to
10030 * and if we have one we move all queued data on the
10031 * out wheel to this alternate address.
10033 if (net->ref_count > 1)
10034 sctp_move_chunks_from_net(stcb, net);
10037 * if ((asoc->sat_network) || (net->addr_is_local))
10038 * { burst_limit = asoc->max_burst *
10039 * SCTP_SAT_NETWORK_BURST_INCR; }
10041 if (asoc->max_burst > 0) {
10042 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10043 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10045 * JRS - Use the congestion
10046 * control given in the
10047 * congestion control module
10049 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10050 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10051 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10053 SCTP_STAT_INCR(sctps_maxburstqueued);
10055 net->fast_retran_ip = 0;
10057 if (net->flight_size == 0) {
10059 * Should be decaying the
10071 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10072 &reason_code, 0, from_where,
10073 &now, &now_filled, frag_point, so_locked);
10075 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10076 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10077 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10079 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10080 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10081 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10085 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10087 tot_out += num_out;
10089 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10090 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10091 if (num_out == 0) {
10092 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10097 * When the Nagle algorithm is used, look at how
10098 * much is unsent, then if its smaller than an MTU
10099 * and we have data in flight we stop, except if we
10100 * are handling a fragmented user message.
10102 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10103 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10104 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10105 (stcb->asoc.total_flight > 0) &&
10106 ((stcb->asoc.locked_on_sending == NULL) ||
10107 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10111 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10112 TAILQ_EMPTY(&asoc->send_queue) &&
10113 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10114 /* Nothing left to send */
10117 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10118 /* Nothing left to send */
10121 } while (num_out &&
10122 ((asoc->max_burst == 0) ||
10123 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10124 (burst_cnt < asoc->max_burst)));
10126 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10127 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10128 SCTP_STAT_INCR(sctps_maxburstqueued);
10129 asoc->burst_limit_applied = 1;
10130 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10131 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10134 asoc->burst_limit_applied = 0;
10137 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10138 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10140 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10144 * Now we need to clean up the control chunk chain if a ECNE is on
10145 * it. It must be marked as UNSENT again so next call will continue
10146 * to send it until such time that we get a CWR, to remove it.
10148 if (stcb->asoc.ecn_echo_cnt_onq)
10149 sctp_fix_ecn_echo(asoc);
10151 if (stcb->asoc.trigger_reset) {
10152 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10162 struct sctp_inpcb *inp,
10164 struct sockaddr *addr,
10165 struct mbuf *control,
10170 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10173 if (inp->sctp_socket == NULL) {
10174 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10177 return (sctp_sosend(inp->sctp_socket,
10179 (struct uio *)NULL,
10187 send_forward_tsn(struct sctp_tcb *stcb,
10188 struct sctp_association *asoc)
10190 struct sctp_tmit_chunk *chk;
10191 struct sctp_forward_tsn_chunk *fwdtsn;
10192 uint32_t advance_peer_ack_point;
10194 SCTP_TCB_LOCK_ASSERT(stcb);
10195 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10196 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10197 /* mark it to unsent */
10198 chk->sent = SCTP_DATAGRAM_UNSENT;
10199 chk->snd_count = 0;
10200 /* Do we correct its output location? */
10202 sctp_free_remote_addr(chk->whoTo);
10205 goto sctp_fill_in_rest;
10208 /* Ok if we reach here we must build one */
10209 sctp_alloc_a_chunk(stcb, chk);
10213 asoc->fwd_tsn_cnt++;
10214 chk->copy_by_ref = 0;
10215 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10216 chk->rec.chunk_id.can_take_data = 0;
10220 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10221 if (chk->data == NULL) {
10222 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10225 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10226 chk->sent = SCTP_DATAGRAM_UNSENT;
10227 chk->snd_count = 0;
10228 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10229 asoc->ctrl_queue_cnt++;
10232 * Here we go through and fill out the part that deals with
10233 * stream/seq of the ones we skip.
10235 SCTP_BUF_LEN(chk->data) = 0;
10237 struct sctp_tmit_chunk *at, *tp1, *last;
10238 struct sctp_strseq *strseq;
10239 unsigned int cnt_of_space, i, ovh;
10240 unsigned int space_needed;
10241 unsigned int cnt_of_skipped = 0;
10243 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10244 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10245 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10246 /* no more to look at */
10249 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10250 /* We don't report these */
10255 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10256 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10258 cnt_of_space = M_TRAILINGSPACE(chk->data);
10260 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10261 ovh = SCTP_MIN_OVERHEAD;
10263 ovh = SCTP_MIN_V4_OVERHEAD;
10265 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10266 /* trim to a mtu size */
10267 cnt_of_space = asoc->smallest_mtu - ovh;
10269 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10270 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10271 0xff, 0, cnt_of_skipped,
10272 asoc->advanced_peer_ack_point);
10275 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10276 if (cnt_of_space < space_needed) {
10278 * ok we must trim down the chunk by lowering the
10279 * advance peer ack point.
10281 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10282 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10283 0xff, 0xff, cnt_of_space,
10286 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10287 cnt_of_skipped /= sizeof(struct sctp_strseq);
10289 * Go through and find the TSN that will be the one
10292 at = TAILQ_FIRST(&asoc->sent_queue);
10294 for (i = 0; i < cnt_of_skipped; i++) {
10295 tp1 = TAILQ_NEXT(at, sctp_next);
10302 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10303 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10304 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10305 asoc->advanced_peer_ack_point);
10309 * last now points to last one I can report, update
10313 advance_peer_ack_point = last->rec.data.TSN_seq;
10314 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10315 cnt_of_skipped * sizeof(struct sctp_strseq);
10317 chk->send_size = space_needed;
10318 /* Setup the chunk */
10319 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10320 fwdtsn->ch.chunk_length = htons(chk->send_size);
10321 fwdtsn->ch.chunk_flags = 0;
10322 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10323 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10324 SCTP_BUF_LEN(chk->data) = chk->send_size;
10327 * Move pointer to after the fwdtsn and transfer to the
10330 strseq = (struct sctp_strseq *)fwdtsn;
10332 * Now populate the strseq list. This is done blindly
10333 * without pulling out duplicate stream info. This is
10334 * inefficent but won't harm the process since the peer will
10335 * look at these in sequence and will thus release anything.
10336 * It could mean we exceed the PMTU and chop off some that
10337 * we could have included.. but this is unlikely (aka 1432/4
10338 * would mean 300+ stream seq's would have to be reported in
10339 * one FWD-TSN. With a bit of work we can later FIX this to
10340 * optimize and pull out duplcates.. but it does add more
10341 * overhead. So for now... not!
10343 at = TAILQ_FIRST(&asoc->sent_queue);
10344 for (i = 0; i < cnt_of_skipped; i++) {
10345 tp1 = TAILQ_NEXT(at, sctp_next);
10348 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10349 /* We don't report these */
10354 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10355 at->rec.data.fwd_tsn_cnt = 0;
10357 strseq->stream = ntohs(at->rec.data.stream_number);
10358 strseq->sequence = ntohs(at->rec.data.stream_seq);
10367 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10368 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10374 * Queue up a SACK or NR-SACK in the control queue.
10375 * We must first check to see if a SACK or NR-SACK is
10376 * somehow on the control queue.
10377 * If so, we will take and and remove the old one.
10379 struct sctp_association *asoc;
10380 struct sctp_tmit_chunk *chk, *a_chk;
10381 struct sctp_sack_chunk *sack;
10382 struct sctp_nr_sack_chunk *nr_sack;
10383 struct sctp_gap_ack_block *gap_descriptor;
10384 struct sack_track *selector;
10389 int limit_reached = 0;
10390 unsigned int i, siz, j;
10391 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10394 uint32_t highest_tsn;
10399 if (stcb->asoc.nrsack_supported == 1) {
10400 type = SCTP_NR_SELECTIVE_ACK;
10402 type = SCTP_SELECTIVE_ACK;
10405 asoc = &stcb->asoc;
10406 SCTP_TCB_LOCK_ASSERT(stcb);
10407 if (asoc->last_data_chunk_from == NULL) {
10408 /* Hmm we never received anything */
10411 sctp_slide_mapping_arrays(stcb);
10412 sctp_set_rwnd(stcb, asoc);
10413 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10414 if (chk->rec.chunk_id.id == type) {
10415 /* Hmm, found a sack already on queue, remove it */
10416 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10417 asoc->ctrl_queue_cnt--;
10420 sctp_m_freem(a_chk->data);
10421 a_chk->data = NULL;
10423 if (a_chk->whoTo) {
10424 sctp_free_remote_addr(a_chk->whoTo);
10425 a_chk->whoTo = NULL;
10430 if (a_chk == NULL) {
10431 sctp_alloc_a_chunk(stcb, a_chk);
10432 if (a_chk == NULL) {
10433 /* No memory so we drop the idea, and set a timer */
10434 if (stcb->asoc.delayed_ack) {
10435 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10436 stcb->sctp_ep, stcb, NULL,
10437 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10438 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10439 stcb->sctp_ep, stcb, NULL);
10441 stcb->asoc.send_sack = 1;
10445 a_chk->copy_by_ref = 0;
10446 a_chk->rec.chunk_id.id = type;
10447 a_chk->rec.chunk_id.can_take_data = 1;
10449 /* Clear our pkt counts */
10450 asoc->data_pkts_seen = 0;
10453 a_chk->asoc = asoc;
10454 a_chk->snd_count = 0;
10455 a_chk->send_size = 0; /* fill in later */
10456 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10457 a_chk->whoTo = NULL;
10459 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10461 * Ok, the destination for the SACK is unreachable, lets see if
10462 * we can select an alternate to asoc->last_data_chunk_from
10464 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10465 if (a_chk->whoTo == NULL) {
10466 /* Nope, no alternate */
10467 a_chk->whoTo = asoc->last_data_chunk_from;
10470 a_chk->whoTo = asoc->last_data_chunk_from;
10472 if (a_chk->whoTo) {
10473 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10475 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10476 highest_tsn = asoc->highest_tsn_inside_map;
10478 highest_tsn = asoc->highest_tsn_inside_nr_map;
10480 if (highest_tsn == asoc->cumulative_tsn) {
10482 if (type == SCTP_SELECTIVE_ACK) {
10483 space_req = sizeof(struct sctp_sack_chunk);
10485 space_req = sizeof(struct sctp_nr_sack_chunk);
10488 /* gaps get a cluster */
10489 space_req = MCLBYTES;
10491 /* Ok now lets formulate a MBUF with our sack */
10492 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10493 if ((a_chk->data == NULL) ||
10494 (a_chk->whoTo == NULL)) {
10495 /* rats, no mbuf memory */
10497 /* was a problem with the destination */
10498 sctp_m_freem(a_chk->data);
10499 a_chk->data = NULL;
10501 sctp_free_a_chunk(stcb, a_chk, so_locked);
10502 /* sa_ignore NO_NULL_CHK */
10503 if (stcb->asoc.delayed_ack) {
10504 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10505 stcb->sctp_ep, stcb, NULL,
10506 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10507 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10508 stcb->sctp_ep, stcb, NULL);
10510 stcb->asoc.send_sack = 1;
10514 /* ok, lets go through and fill it in */
10515 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10516 space = M_TRAILINGSPACE(a_chk->data);
10517 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10518 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10520 limit = mtod(a_chk->data, caddr_t);
10525 if ((asoc->sctp_cmt_on_off > 0) &&
10526 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10528 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10529 * received, then set high bit to 1, else 0. Reset
10532 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10533 asoc->cmt_dac_pkts_rcvd = 0;
10535 #ifdef SCTP_ASOCLOG_OF_TSNS
10536 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10537 stcb->asoc.cumack_log_atsnt++;
10538 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10539 stcb->asoc.cumack_log_atsnt = 0;
10542 /* reset the readers interpretation */
10543 stcb->freed_by_sorcv_sincelast = 0;
10545 if (type == SCTP_SELECTIVE_ACK) {
10546 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10548 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10549 if (highest_tsn > asoc->mapping_array_base_tsn) {
10550 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10552 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10556 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10557 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10558 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10559 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10561 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10565 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10568 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10570 if (((type == SCTP_SELECTIVE_ACK) &&
10571 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10572 ((type == SCTP_NR_SELECTIVE_ACK) &&
10573 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10574 /* we have a gap .. maybe */
10575 for (i = 0; i < siz; i++) {
10576 tsn_map = asoc->mapping_array[i];
10577 if (type == SCTP_SELECTIVE_ACK) {
10578 tsn_map |= asoc->nr_mapping_array[i];
10582 * Clear all bits corresponding to TSNs
10583 * smaller or equal to the cumulative TSN.
10585 tsn_map &= (~0 << (1 - offset));
10587 selector = &sack_array[tsn_map];
10588 if (mergeable && selector->right_edge) {
10590 * Backup, left and right edges were ok to
10596 if (selector->num_entries == 0)
10599 for (j = 0; j < selector->num_entries; j++) {
10600 if (mergeable && selector->right_edge) {
10602 * do a merge by NOT setting
10608 * no merge, set the left
10612 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10614 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10617 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10623 if (selector->left_edge) {
10627 if (limit_reached) {
10628 /* Reached the limit stop */
10634 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10635 (limit_reached == 0)) {
10639 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10640 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10642 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10645 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10648 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10650 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10651 /* we have a gap .. maybe */
10652 for (i = 0; i < siz; i++) {
10653 tsn_map = asoc->nr_mapping_array[i];
10656 * Clear all bits corresponding to
10657 * TSNs smaller or equal to the
10660 tsn_map &= (~0 << (1 - offset));
10662 selector = &sack_array[tsn_map];
10663 if (mergeable && selector->right_edge) {
10665 * Backup, left and right edges were
10668 num_nr_gap_blocks--;
10671 if (selector->num_entries == 0)
10674 for (j = 0; j < selector->num_entries; j++) {
10675 if (mergeable && selector->right_edge) {
10677 * do a merge by NOT
10684 * no merge, set the
10688 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10690 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10691 num_nr_gap_blocks++;
10693 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10699 if (selector->left_edge) {
10703 if (limit_reached) {
10704 /* Reached the limit stop */
10711 /* now we must add any dups we are going to report. */
10712 if ((limit_reached == 0) && (asoc->numduptsns)) {
10713 dup = (uint32_t *) gap_descriptor;
10714 for (i = 0; i < asoc->numduptsns; i++) {
10715 *dup = htonl(asoc->dup_tsns[i]);
10718 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10723 asoc->numduptsns = 0;
10726 * now that the chunk is prepared queue it to the control chunk
10729 if (type == SCTP_SELECTIVE_ACK) {
10730 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10731 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10732 num_dups * sizeof(int32_t);
10733 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10734 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10735 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10736 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10737 sack->sack.num_dup_tsns = htons(num_dups);
10738 sack->ch.chunk_type = type;
10739 sack->ch.chunk_flags = flags;
10740 sack->ch.chunk_length = htons(a_chk->send_size);
10742 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10743 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10744 num_dups * sizeof(int32_t);
10745 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10746 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10747 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10748 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10749 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10750 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10751 nr_sack->nr_sack.reserved = 0;
10752 nr_sack->ch.chunk_type = type;
10753 nr_sack->ch.chunk_flags = flags;
10754 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10756 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10757 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10758 asoc->ctrl_queue_cnt++;
10759 asoc->send_sack = 0;
10760 SCTP_STAT_INCR(sctps_sendsacks);
10765 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10766 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10771 struct mbuf *m_abort, *m, *m_last;
10772 struct mbuf *m_out, *m_end = NULL;
10773 struct sctp_abort_chunk *abort;
10774 struct sctp_auth_chunk *auth = NULL;
10775 struct sctp_nets *net;
10777 uint32_t auth_offset = 0;
10778 uint16_t cause_len, chunk_len, padding_len;
10780 SCTP_TCB_LOCK_ASSERT(stcb);
10782 * Add an AUTH chunk, if chunk requires it and save the offset into
10783 * the chain for AUTH
10785 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10786 stcb->asoc.peer_auth_chunks)) {
10787 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10788 stcb, SCTP_ABORT_ASSOCIATION);
10789 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10793 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10794 if (m_abort == NULL) {
10796 sctp_m_freem(m_out);
10799 sctp_m_freem(operr);
10803 /* link in any error */
10804 SCTP_BUF_NEXT(m_abort) = operr;
10807 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10808 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10809 if (SCTP_BUF_NEXT(m) == NULL) {
10813 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10814 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10815 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10816 if (m_out == NULL) {
10817 /* NO Auth chunk prepended, so reserve space in front */
10818 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10821 /* Put AUTH chunk at the front of the chain */
10822 SCTP_BUF_NEXT(m_end) = m_abort;
10824 if (stcb->asoc.alternate) {
10825 net = stcb->asoc.alternate;
10827 net = stcb->asoc.primary_destination;
10829 /* Fill in the ABORT chunk header. */
10830 abort = mtod(m_abort, struct sctp_abort_chunk *);
10831 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10832 if (stcb->asoc.peer_vtag == 0) {
10833 /* This happens iff the assoc is in COOKIE-WAIT state. */
10834 vtag = stcb->asoc.my_vtag;
10835 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10837 vtag = stcb->asoc.peer_vtag;
10838 abort->ch.chunk_flags = 0;
10840 abort->ch.chunk_length = htons(chunk_len);
10841 /* Add padding, if necessary. */
10842 if (padding_len > 0) {
10843 if ((m_last == NULL) ||
10844 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10845 sctp_m_freem(m_out);
10849 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10850 (struct sockaddr *)&net->ro._l_addr,
10851 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10852 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10853 stcb->asoc.primary_destination->port, NULL,
10856 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10860 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10861 struct sctp_nets *net,
10864 /* formulate and SEND a SHUTDOWN-COMPLETE */
10865 struct mbuf *m_shutdown_comp;
10866 struct sctp_shutdown_complete_chunk *shutdown_complete;
10870 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10871 if (m_shutdown_comp == NULL) {
10875 if (reflect_vtag) {
10876 flags = SCTP_HAD_NO_TCB;
10877 vtag = stcb->asoc.my_vtag;
10880 vtag = stcb->asoc.peer_vtag;
10882 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10883 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10884 shutdown_complete->ch.chunk_flags = flags;
10885 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10886 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10887 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10888 (struct sockaddr *)&net->ro._l_addr,
10889 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10890 stcb->sctp_ep->sctp_lport, stcb->rport,
10894 SCTP_SO_NOT_LOCKED);
10895 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10900 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10901 struct sctphdr *sh, uint32_t vtag,
10902 uint8_t type, struct mbuf *cause,
10903 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
10904 uint32_t vrf_id, uint16_t port)
10906 struct mbuf *o_pak;
10908 struct sctphdr *shout;
10909 struct sctp_chunkhdr *ch;
10911 #if defined(INET) || defined(INET6)
10912 struct udphdr *udp;
10916 int len, cause_len, padding_len;
10919 struct sockaddr_in *src_sin, *dst_sin;
10924 struct sockaddr_in6 *src_sin6, *dst_sin6;
10925 struct ip6_hdr *ip6;
10929 /* Compute the length of the cause and add final padding. */
10931 if (cause != NULL) {
10932 struct mbuf *m_at, *m_last = NULL;
10934 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10935 if (SCTP_BUF_NEXT(m_at) == NULL)
10937 cause_len += SCTP_BUF_LEN(m_at);
10939 padding_len = cause_len % 4;
10940 if (padding_len != 0) {
10941 padding_len = 4 - padding_len;
10943 if (padding_len != 0) {
10944 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
10945 sctp_m_freem(cause);
10952 /* Get an mbuf for the header. */
10953 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
10954 switch (dst->sa_family) {
10957 len += sizeof(struct ip);
10962 len += sizeof(struct ip6_hdr);
10968 #if defined(INET) || defined(INET6)
10970 len += sizeof(struct udphdr);
10973 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
10974 if (mout == NULL) {
10976 sctp_m_freem(cause);
10980 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10981 SCTP_BUF_LEN(mout) = len;
10982 SCTP_BUF_NEXT(mout) = cause;
10983 M_SETFIB(mout, fibnum);
10984 mout->m_pkthdr.flowid = mflowid;
10985 M_HASHTYPE_SET(mout, mflowtype);
10992 switch (dst->sa_family) {
10995 src_sin = (struct sockaddr_in *)src;
10996 dst_sin = (struct sockaddr_in *)dst;
10997 ip = mtod(mout, struct ip *);
10998 ip->ip_v = IPVERSION;
10999 ip->ip_hl = (sizeof(struct ip) >> 2);
11001 ip->ip_id = ip_newid();
11003 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11005 ip->ip_p = IPPROTO_UDP;
11007 ip->ip_p = IPPROTO_SCTP;
11009 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11010 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11012 len = sizeof(struct ip);
11013 shout = (struct sctphdr *)((caddr_t)ip + len);
11018 src_sin6 = (struct sockaddr_in6 *)src;
11019 dst_sin6 = (struct sockaddr_in6 *)dst;
11020 ip6 = mtod(mout, struct ip6_hdr *);
11021 ip6->ip6_flow = htonl(0x60000000);
11022 if (V_ip6_auto_flowlabel) {
11023 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11025 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11027 ip6->ip6_nxt = IPPROTO_UDP;
11029 ip6->ip6_nxt = IPPROTO_SCTP;
11031 ip6->ip6_src = dst_sin6->sin6_addr;
11032 ip6->ip6_dst = src_sin6->sin6_addr;
11033 len = sizeof(struct ip6_hdr);
11034 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11039 shout = mtod(mout, struct sctphdr *);
11042 #if defined(INET) || defined(INET6)
11044 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11045 sctp_m_freem(mout);
11048 udp = (struct udphdr *)shout;
11049 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11050 udp->uh_dport = port;
11052 udp->uh_ulen = htons(sizeof(struct udphdr) +
11053 sizeof(struct sctphdr) +
11054 sizeof(struct sctp_chunkhdr) +
11055 cause_len + padding_len);
11056 len += sizeof(struct udphdr);
11057 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11062 shout->src_port = sh->dest_port;
11063 shout->dest_port = sh->src_port;
11064 shout->checksum = 0;
11066 shout->v_tag = htonl(vtag);
11068 shout->v_tag = sh->v_tag;
11070 len += sizeof(struct sctphdr);
11071 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11072 ch->chunk_type = type;
11074 ch->chunk_flags = 0;
11076 ch->chunk_flags = SCTP_HAD_NO_TCB;
11078 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
11079 len += sizeof(struct sctp_chunkhdr);
11080 len += cause_len + padding_len;
11082 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11083 sctp_m_freem(mout);
11086 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11087 switch (dst->sa_family) {
11092 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11097 ip->ip_len = htons(len);
11099 #if defined(SCTP_WITH_NO_CSUM)
11100 SCTP_STAT_INCR(sctps_sendnocrc);
11102 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11103 SCTP_STAT_INCR(sctps_sendswcrc);
11106 SCTP_ENABLE_UDP_CSUM(o_pak);
11109 #if defined(SCTP_WITH_NO_CSUM)
11110 SCTP_STAT_INCR(sctps_sendnocrc);
11112 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11113 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11114 SCTP_STAT_INCR(sctps_sendhwcrc);
11117 #ifdef SCTP_PACKET_LOGGING
11118 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11119 sctp_packet_log(o_pak);
11122 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11127 ip6->ip6_plen = len - sizeof(struct ip6_hdr);
11129 #if defined(SCTP_WITH_NO_CSUM)
11130 SCTP_STAT_INCR(sctps_sendnocrc);
11132 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11133 SCTP_STAT_INCR(sctps_sendswcrc);
11135 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11136 udp->uh_sum = 0xffff;
11139 #if defined(SCTP_WITH_NO_CSUM)
11140 SCTP_STAT_INCR(sctps_sendnocrc);
11142 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11143 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11144 SCTP_STAT_INCR(sctps_sendhwcrc);
11147 #ifdef SCTP_PACKET_LOGGING
11148 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11149 sctp_packet_log(o_pak);
11152 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11156 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11158 sctp_m_freem(mout);
11159 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11162 SCTP_STAT_INCR(sctps_sendpackets);
11163 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11164 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11169 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11170 struct sctphdr *sh,
11171 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11172 uint32_t vrf_id, uint16_t port)
11174 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11175 mflowtype, mflowid, fibnum,
11180 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11181 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11186 struct sctp_tmit_chunk *chk;
11187 struct sctp_heartbeat_chunk *hb;
11188 struct timeval now;
11190 SCTP_TCB_LOCK_ASSERT(stcb);
11194 (void)SCTP_GETTIME_TIMEVAL(&now);
11195 switch (net->ro._l_addr.sa.sa_family) {
11207 sctp_alloc_a_chunk(stcb, chk);
11209 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11212 chk->copy_by_ref = 0;
11213 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11214 chk->rec.chunk_id.can_take_data = 1;
11216 chk->asoc = &stcb->asoc;
11217 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11219 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11220 if (chk->data == NULL) {
11221 sctp_free_a_chunk(stcb, chk, so_locked);
11224 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11225 SCTP_BUF_LEN(chk->data) = chk->send_size;
11226 chk->sent = SCTP_DATAGRAM_UNSENT;
11227 chk->snd_count = 0;
11229 atomic_add_int(&chk->whoTo->ref_count, 1);
11230 /* Now we have a mbuf that we can fill in with the details */
11231 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11232 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11233 /* fill out chunk header */
11234 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11235 hb->ch.chunk_flags = 0;
11236 hb->ch.chunk_length = htons(chk->send_size);
11237 /* Fill out hb parameter */
11238 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11239 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11240 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11241 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11242 /* Did our user request this one, put it in */
11243 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family;
11244 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11245 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11247 * we only take from the entropy pool if the address is not
11250 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11251 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11253 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11254 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11256 switch (net->ro._l_addr.sa.sa_family) {
11259 memcpy(hb->heartbeat.hb_info.address,
11260 &net->ro._l_addr.sin.sin_addr,
11261 sizeof(net->ro._l_addr.sin.sin_addr));
11266 memcpy(hb->heartbeat.hb_info.address,
11267 &net->ro._l_addr.sin6.sin6_addr,
11268 sizeof(net->ro._l_addr.sin6.sin6_addr));
11273 sctp_m_freem(chk->data);
11276 sctp_free_a_chunk(stcb, chk, so_locked);
11280 net->hb_responded = 0;
11281 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11282 stcb->asoc.ctrl_queue_cnt++;
11283 SCTP_STAT_INCR(sctps_sendheartbeat);
11288 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11291 struct sctp_association *asoc;
11292 struct sctp_ecne_chunk *ecne;
11293 struct sctp_tmit_chunk *chk;
11298 asoc = &stcb->asoc;
11299 SCTP_TCB_LOCK_ASSERT(stcb);
11300 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11301 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11302 /* found a previous ECN_ECHO update it if needed */
11303 uint32_t cnt, ctsn;
11305 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11306 ctsn = ntohl(ecne->tsn);
11307 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11308 ecne->tsn = htonl(high_tsn);
11309 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11311 cnt = ntohl(ecne->num_pkts_since_cwr);
11313 ecne->num_pkts_since_cwr = htonl(cnt);
11317 /* nope could not find one to update so we must build one */
11318 sctp_alloc_a_chunk(stcb, chk);
11322 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11323 chk->copy_by_ref = 0;
11324 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11325 chk->rec.chunk_id.can_take_data = 0;
11327 chk->asoc = &stcb->asoc;
11328 chk->send_size = sizeof(struct sctp_ecne_chunk);
11329 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11330 if (chk->data == NULL) {
11331 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11334 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11335 SCTP_BUF_LEN(chk->data) = chk->send_size;
11336 chk->sent = SCTP_DATAGRAM_UNSENT;
11337 chk->snd_count = 0;
11339 atomic_add_int(&chk->whoTo->ref_count, 1);
11341 stcb->asoc.ecn_echo_cnt_onq++;
11342 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11343 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11344 ecne->ch.chunk_flags = 0;
11345 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11346 ecne->tsn = htonl(high_tsn);
11347 ecne->num_pkts_since_cwr = htonl(1);
11348 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11349 asoc->ctrl_queue_cnt++;
11353 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11354 struct mbuf *m, int len, int iphlen, int bad_crc)
11356 struct sctp_association *asoc;
11357 struct sctp_pktdrop_chunk *drp;
11358 struct sctp_tmit_chunk *chk;
11364 struct sctp_chunkhdr *ch, chunk_buf;
11365 unsigned int chk_length;
11370 asoc = &stcb->asoc;
11371 SCTP_TCB_LOCK_ASSERT(stcb);
11372 if (asoc->pktdrop_supported == 0) {
11374 * peer must declare support before I send one.
11378 if (stcb->sctp_socket == NULL) {
11381 sctp_alloc_a_chunk(stcb, chk);
11385 chk->copy_by_ref = 0;
11386 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11387 chk->rec.chunk_id.can_take_data = 1;
11390 chk->send_size = len;
11391 /* Validate that we do not have an ABORT in here. */
11392 offset = iphlen + sizeof(struct sctphdr);
11393 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11394 sizeof(*ch), (uint8_t *) & chunk_buf);
11395 while (ch != NULL) {
11396 chk_length = ntohs(ch->chunk_length);
11397 if (chk_length < sizeof(*ch)) {
11398 /* break to abort land */
11401 switch (ch->chunk_type) {
11402 case SCTP_PACKET_DROPPED:
11403 case SCTP_ABORT_ASSOCIATION:
11404 case SCTP_INITIATION_ACK:
11406 * We don't respond with an PKT-DROP to an ABORT
11407 * or PKT-DROP. We also do not respond to an
11408 * INIT-ACK, because we can't know if the initiation
11409 * tag is correct or not.
11411 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11416 offset += SCTP_SIZE32(chk_length);
11417 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11418 sizeof(*ch), (uint8_t *) & chunk_buf);
11421 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11422 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11424 * only send 1 mtu worth, trim off the excess on the end.
11427 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11430 chk->asoc = &stcb->asoc;
11431 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11432 if (chk->data == NULL) {
11434 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11437 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11438 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11440 sctp_m_freem(chk->data);
11444 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11445 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11446 chk->book_size_scale = 0;
11448 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11449 drp->trunc_len = htons(fullsz);
11451 * Len is already adjusted to size minus overhead above take
11452 * out the pkt_drop chunk itself from it.
11454 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11455 len = chk->send_size;
11457 /* no truncation needed */
11458 drp->ch.chunk_flags = 0;
11459 drp->trunc_len = htons(0);
11462 drp->ch.chunk_flags |= SCTP_BADCRC;
11464 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11465 SCTP_BUF_LEN(chk->data) = chk->send_size;
11466 chk->sent = SCTP_DATAGRAM_UNSENT;
11467 chk->snd_count = 0;
11469 /* we should hit here */
11471 atomic_add_int(&chk->whoTo->ref_count, 1);
11475 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11476 drp->ch.chunk_length = htons(chk->send_size);
11477 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11481 drp->bottle_bw = htonl(spc);
11482 if (asoc->my_rwnd) {
11483 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11484 asoc->size_on_all_streams +
11485 asoc->my_rwnd_control_len +
11486 stcb->sctp_socket->so_rcv.sb_cc);
11489 * If my rwnd is 0, possibly from mbuf depletion as well as
11490 * space used, tell the peer there is NO space aka onq == bw
11492 drp->current_onq = htonl(spc);
11496 m_copydata(m, iphlen, len, (caddr_t)datap);
11497 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11498 asoc->ctrl_queue_cnt++;
11502 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11504 struct sctp_association *asoc;
11505 struct sctp_cwr_chunk *cwr;
11506 struct sctp_tmit_chunk *chk;
11508 SCTP_TCB_LOCK_ASSERT(stcb);
11512 asoc = &stcb->asoc;
11513 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11514 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11516 * found a previous CWR queued to same destination
11517 * update it if needed
11521 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11522 ctsn = ntohl(cwr->tsn);
11523 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11524 cwr->tsn = htonl(high_tsn);
11526 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11527 /* Make sure override is carried */
11528 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11533 sctp_alloc_a_chunk(stcb, chk);
11537 chk->copy_by_ref = 0;
11538 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11539 chk->rec.chunk_id.can_take_data = 1;
11541 chk->asoc = &stcb->asoc;
11542 chk->send_size = sizeof(struct sctp_cwr_chunk);
11543 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11544 if (chk->data == NULL) {
11545 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11548 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11549 SCTP_BUF_LEN(chk->data) = chk->send_size;
11550 chk->sent = SCTP_DATAGRAM_UNSENT;
11551 chk->snd_count = 0;
11553 atomic_add_int(&chk->whoTo->ref_count, 1);
11554 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11555 cwr->ch.chunk_type = SCTP_ECN_CWR;
11556 cwr->ch.chunk_flags = override;
11557 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11558 cwr->tsn = htonl(high_tsn);
11559 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11560 asoc->ctrl_queue_cnt++;
11564 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11565 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11567 uint16_t len, old_len, i;
11568 struct sctp_stream_reset_out_request *req_out;
11569 struct sctp_chunkhdr *ch;
11571 int number_entries = 0;
11573 ch = mtod(chk->data, struct sctp_chunkhdr *);
11574 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11575 /* get to new offset for the param. */
11576 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11577 /* now how long will this param be? */
11578 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11579 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11580 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11581 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11585 if (number_entries == 0) {
11588 if (number_entries == stcb->asoc.streamoutcnt) {
11589 number_entries = 0;
11591 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11592 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11594 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11595 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11596 req_out->ph.param_length = htons(len);
11597 req_out->request_seq = htonl(seq);
11598 req_out->response_seq = htonl(resp_seq);
11599 req_out->send_reset_at_tsn = htonl(last_sent);
11601 if (number_entries) {
11602 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11603 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11604 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11605 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11606 req_out->list_of_streams[at] = htons(i);
11608 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11609 if (at >= number_entries) {
11615 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11616 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11619 if (SCTP_SIZE32(len) > len) {
11621 * Need to worry about the pad we may end up adding to the
11622 * end. This is easy since the struct is either aligned to 4
11623 * bytes or 2 bytes off.
11625 req_out->list_of_streams[number_entries] = 0;
11627 /* now fix the chunk length */
11628 ch->chunk_length = htons(len + old_len);
11629 chk->book_size = len + old_len;
11630 chk->book_size_scale = 0;
11631 chk->send_size = SCTP_SIZE32(chk->book_size);
11632 SCTP_BUF_LEN(chk->data) = chk->send_size;
11637 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11638 int number_entries, uint16_t * list,
11641 uint16_t len, old_len, i;
11642 struct sctp_stream_reset_in_request *req_in;
11643 struct sctp_chunkhdr *ch;
11645 ch = mtod(chk->data, struct sctp_chunkhdr *);
11646 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11648 /* get to new offset for the param. */
11649 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11650 /* now how long will this param be? */
11651 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11652 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11653 req_in->ph.param_length = htons(len);
11654 req_in->request_seq = htonl(seq);
11655 if (number_entries) {
11656 for (i = 0; i < number_entries; i++) {
11657 req_in->list_of_streams[i] = htons(list[i]);
11660 if (SCTP_SIZE32(len) > len) {
11662 * Need to worry about the pad we may end up adding to the
11663 * end. This is easy since the struct is either aligned to 4
11664 * bytes or 2 bytes off.
11666 req_in->list_of_streams[number_entries] = 0;
11668 /* now fix the chunk length */
11669 ch->chunk_length = htons(len + old_len);
11670 chk->book_size = len + old_len;
11671 chk->book_size_scale = 0;
11672 chk->send_size = SCTP_SIZE32(chk->book_size);
11673 SCTP_BUF_LEN(chk->data) = chk->send_size;
11678 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11681 uint16_t len, old_len;
11682 struct sctp_stream_reset_tsn_request *req_tsn;
11683 struct sctp_chunkhdr *ch;
11685 ch = mtod(chk->data, struct sctp_chunkhdr *);
11686 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11688 /* get to new offset for the param. */
11689 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11690 /* now how long will this param be? */
11691 len = sizeof(struct sctp_stream_reset_tsn_request);
11692 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11693 req_tsn->ph.param_length = htons(len);
11694 req_tsn->request_seq = htonl(seq);
11696 /* now fix the chunk length */
11697 ch->chunk_length = htons(len + old_len);
11698 chk->send_size = len + old_len;
11699 chk->book_size = SCTP_SIZE32(chk->send_size);
11700 chk->book_size_scale = 0;
11701 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11706 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11707 uint32_t resp_seq, uint32_t result)
11709 uint16_t len, old_len;
11710 struct sctp_stream_reset_response *resp;
11711 struct sctp_chunkhdr *ch;
11713 ch = mtod(chk->data, struct sctp_chunkhdr *);
11714 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11716 /* get to new offset for the param. */
11717 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11718 /* now how long will this param be? */
11719 len = sizeof(struct sctp_stream_reset_response);
11720 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11721 resp->ph.param_length = htons(len);
11722 resp->response_seq = htonl(resp_seq);
11723 resp->result = ntohl(result);
11725 /* now fix the chunk length */
11726 ch->chunk_length = htons(len + old_len);
11727 chk->book_size = len + old_len;
11728 chk->book_size_scale = 0;
11729 chk->send_size = SCTP_SIZE32(chk->book_size);
11730 SCTP_BUF_LEN(chk->data) = chk->send_size;
11735 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11736 struct sctp_stream_reset_list *ent,
11739 struct sctp_association *asoc;
11740 struct sctp_tmit_chunk *chk;
11741 struct sctp_chunkhdr *ch;
11743 asoc = &stcb->asoc;
11746 * Reset our last reset action to the new one IP -> response
11747 * (PERFORMED probably). This assures that if we fail to send, a
11748 * retran from the peer will get the new response.
11750 asoc->last_reset_action[0] = response;
11751 if (asoc->stream_reset_outstanding) {
11754 sctp_alloc_a_chunk(stcb, chk);
11756 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11759 chk->copy_by_ref = 0;
11760 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11761 chk->rec.chunk_id.can_take_data = 0;
11763 chk->asoc = &stcb->asoc;
11764 chk->book_size = sizeof(struct sctp_chunkhdr);
11765 chk->send_size = SCTP_SIZE32(chk->book_size);
11766 chk->book_size_scale = 0;
11767 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11768 if (chk->data == NULL) {
11769 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11770 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11773 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11774 sctp_add_stream_reset_result(chk, ent->seq, response);
11775 /* setup chunk parameters */
11776 chk->sent = SCTP_DATAGRAM_UNSENT;
11777 chk->snd_count = 0;
11778 if (stcb->asoc.alternate) {
11779 chk->whoTo = stcb->asoc.alternate;
11781 chk->whoTo = stcb->asoc.primary_destination;
11783 ch = mtod(chk->data, struct sctp_chunkhdr *);
11784 ch->chunk_type = SCTP_STREAM_RESET;
11785 ch->chunk_flags = 0;
11786 ch->chunk_length = htons(chk->book_size);
11787 atomic_add_int(&chk->whoTo->ref_count, 1);
11788 SCTP_BUF_LEN(chk->data) = chk->send_size;
11789 /* insert the chunk for sending */
11790 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11793 asoc->ctrl_queue_cnt++;
11797 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11798 uint32_t resp_seq, uint32_t result,
11799 uint32_t send_una, uint32_t recv_next)
11801 uint16_t len, old_len;
11802 struct sctp_stream_reset_response_tsn *resp;
11803 struct sctp_chunkhdr *ch;
11805 ch = mtod(chk->data, struct sctp_chunkhdr *);
11806 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11808 /* get to new offset for the param. */
11809 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11810 /* now how long will this param be? */
11811 len = sizeof(struct sctp_stream_reset_response_tsn);
11812 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11813 resp->ph.param_length = htons(len);
11814 resp->response_seq = htonl(resp_seq);
11815 resp->result = htonl(result);
11816 resp->senders_next_tsn = htonl(send_una);
11817 resp->receivers_next_tsn = htonl(recv_next);
11819 /* now fix the chunk length */
11820 ch->chunk_length = htons(len + old_len);
11821 chk->book_size = len + old_len;
11822 chk->send_size = SCTP_SIZE32(chk->book_size);
11823 chk->book_size_scale = 0;
11824 SCTP_BUF_LEN(chk->data) = chk->send_size;
11829 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11833 uint16_t len, old_len;
11834 struct sctp_chunkhdr *ch;
11835 struct sctp_stream_reset_add_strm *addstr;
11837 ch = mtod(chk->data, struct sctp_chunkhdr *);
11838 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11840 /* get to new offset for the param. */
11841 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11842 /* now how long will this param be? */
11843 len = sizeof(struct sctp_stream_reset_add_strm);
11846 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11847 addstr->ph.param_length = htons(len);
11848 addstr->request_seq = htonl(seq);
11849 addstr->number_of_streams = htons(adding);
11850 addstr->reserved = 0;
11852 /* now fix the chunk length */
11853 ch->chunk_length = htons(len + old_len);
11854 chk->send_size = len + old_len;
11855 chk->book_size = SCTP_SIZE32(chk->send_size);
11856 chk->book_size_scale = 0;
11857 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11862 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11866 uint16_t len, old_len;
11867 struct sctp_chunkhdr *ch;
11868 struct sctp_stream_reset_add_strm *addstr;
11870 ch = mtod(chk->data, struct sctp_chunkhdr *);
11871 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11873 /* get to new offset for the param. */
11874 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11875 /* now how long will this param be? */
11876 len = sizeof(struct sctp_stream_reset_add_strm);
11878 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11879 addstr->ph.param_length = htons(len);
11880 addstr->request_seq = htonl(seq);
11881 addstr->number_of_streams = htons(adding);
11882 addstr->reserved = 0;
11884 /* now fix the chunk length */
11885 ch->chunk_length = htons(len + old_len);
11886 chk->send_size = len + old_len;
11887 chk->book_size = SCTP_SIZE32(chk->send_size);
11888 chk->book_size_scale = 0;
11889 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11894 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
11896 struct sctp_association *asoc;
11897 struct sctp_tmit_chunk *chk;
11898 struct sctp_chunkhdr *ch;
11901 asoc = &stcb->asoc;
11902 asoc->trigger_reset = 0;
11903 if (asoc->stream_reset_outstanding) {
11906 sctp_alloc_a_chunk(stcb, chk);
11908 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11911 chk->copy_by_ref = 0;
11912 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11913 chk->rec.chunk_id.can_take_data = 0;
11915 chk->asoc = &stcb->asoc;
11916 chk->book_size = sizeof(struct sctp_chunkhdr);
11917 chk->send_size = SCTP_SIZE32(chk->book_size);
11918 chk->book_size_scale = 0;
11919 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11920 if (chk->data == NULL) {
11921 sctp_free_a_chunk(stcb, chk, so_locked);
11922 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11925 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11927 /* setup chunk parameters */
11928 chk->sent = SCTP_DATAGRAM_UNSENT;
11929 chk->snd_count = 0;
11930 if (stcb->asoc.alternate) {
11931 chk->whoTo = stcb->asoc.alternate;
11933 chk->whoTo = stcb->asoc.primary_destination;
11935 ch = mtod(chk->data, struct sctp_chunkhdr *);
11936 ch->chunk_type = SCTP_STREAM_RESET;
11937 ch->chunk_flags = 0;
11938 ch->chunk_length = htons(chk->book_size);
11939 atomic_add_int(&chk->whoTo->ref_count, 1);
11940 SCTP_BUF_LEN(chk->data) = chk->send_size;
11941 seq = stcb->asoc.str_reset_seq_out;
11942 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
11944 asoc->stream_reset_outstanding++;
11946 m_freem(chk->data);
11948 sctp_free_a_chunk(stcb, chk, so_locked);
11951 asoc->str_reset = chk;
11952 /* insert the chunk for sending */
11953 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11956 asoc->ctrl_queue_cnt++;
11958 if (stcb->asoc.send_sack) {
11959 sctp_send_sack(stcb, so_locked);
11961 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11966 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11967 uint16_t number_entries, uint16_t * list,
11968 uint8_t send_in_req,
11969 uint8_t send_tsn_req,
11970 uint8_t add_stream,
11972 uint16_t adding_i, uint8_t peer_asked)
11974 struct sctp_association *asoc;
11975 struct sctp_tmit_chunk *chk;
11976 struct sctp_chunkhdr *ch;
11977 int can_send_out_req = 0;
11980 asoc = &stcb->asoc;
11981 if (asoc->stream_reset_outstanding) {
11983 * Already one pending, must get ACK back to clear the flag.
11985 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11988 if ((send_in_req == 0) && (send_tsn_req == 0) &&
11989 (add_stream == 0)) {
11990 /* nothing to do */
11991 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11994 if (send_tsn_req && send_in_req) {
11995 /* error, can't do that */
11996 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11998 } else if (send_in_req) {
11999 can_send_out_req = 1;
12001 if (number_entries > (MCLBYTES -
12002 SCTP_MIN_OVERHEAD -
12003 sizeof(struct sctp_chunkhdr) -
12004 sizeof(struct sctp_stream_reset_out_request)) /
12005 sizeof(uint16_t)) {
12006 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12009 sctp_alloc_a_chunk(stcb, chk);
12011 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12014 chk->copy_by_ref = 0;
12015 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12016 chk->rec.chunk_id.can_take_data = 0;
12018 chk->asoc = &stcb->asoc;
12019 chk->book_size = sizeof(struct sctp_chunkhdr);
12020 chk->send_size = SCTP_SIZE32(chk->book_size);
12021 chk->book_size_scale = 0;
12023 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12024 if (chk->data == NULL) {
12025 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12026 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12029 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12031 /* setup chunk parameters */
12032 chk->sent = SCTP_DATAGRAM_UNSENT;
12033 chk->snd_count = 0;
12034 if (stcb->asoc.alternate) {
12035 chk->whoTo = stcb->asoc.alternate;
12037 chk->whoTo = stcb->asoc.primary_destination;
12039 atomic_add_int(&chk->whoTo->ref_count, 1);
12040 ch = mtod(chk->data, struct sctp_chunkhdr *);
12041 ch->chunk_type = SCTP_STREAM_RESET;
12042 ch->chunk_flags = 0;
12043 ch->chunk_length = htons(chk->book_size);
12044 SCTP_BUF_LEN(chk->data) = chk->send_size;
12046 seq = stcb->asoc.str_reset_seq_out;
12047 if (can_send_out_req) {
12050 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12053 asoc->stream_reset_outstanding++;
12056 if ((add_stream & 1) &&
12057 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12058 /* Need to allocate more */
12059 struct sctp_stream_out *oldstream;
12060 struct sctp_stream_queue_pending *sp, *nsp;
12063 #if defined(SCTP_DETAILED_STR_STATS)
12068 oldstream = stcb->asoc.strmout;
12069 /* get some more */
12070 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12071 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12073 if (stcb->asoc.strmout == NULL) {
12076 stcb->asoc.strmout = oldstream;
12077 /* Turn off the bit */
12078 x = add_stream & 0xfe;
12083 * Ok now we proceed with copying the old out stuff and
12084 * initializing the new stuff.
12086 SCTP_TCB_SEND_LOCK(stcb);
12087 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12088 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12089 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12090 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12091 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
12092 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12093 stcb->asoc.strmout[i].stream_no = i;
12094 stcb->asoc.strmout[i].state = oldstream[i].state;
12095 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
12096 /* now anything on those queues? */
12097 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12098 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12099 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12101 /* Now move assoc pointers too */
12102 if (stcb->asoc.last_out_stream == &oldstream[i]) {
12103 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
12105 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
12106 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
12109 /* now the new streams */
12110 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12111 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12112 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12113 stcb->asoc.strmout[i].chunks_on_queues = 0;
12114 #if defined(SCTP_DETAILED_STR_STATS)
12115 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12116 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12117 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12120 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12121 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12123 stcb->asoc.strmout[i].next_sequence_send = 0x0;
12124 stcb->asoc.strmout[i].stream_no = i;
12125 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12126 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
12127 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12129 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12130 SCTP_FREE(oldstream, SCTP_M_STRMO);
12131 SCTP_TCB_SEND_UNLOCK(stcb);
12134 if ((add_stream & 1) && (adding_o > 0)) {
12135 asoc->strm_pending_add_size = adding_o;
12136 asoc->peer_req_out = peer_asked;
12137 sctp_add_an_out_stream(chk, seq, adding_o);
12139 asoc->stream_reset_outstanding++;
12141 if ((add_stream & 2) && (adding_i > 0)) {
12142 sctp_add_an_in_stream(chk, seq, adding_i);
12144 asoc->stream_reset_outstanding++;
12147 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12149 asoc->stream_reset_outstanding++;
12151 if (send_tsn_req) {
12152 sctp_add_stream_reset_tsn(chk, seq);
12153 asoc->stream_reset_outstanding++;
12155 asoc->str_reset = chk;
12156 /* insert the chunk for sending */
12157 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12160 asoc->ctrl_queue_cnt++;
12161 if (stcb->asoc.send_sack) {
12162 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12164 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12169 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12170 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12171 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12172 uint32_t vrf_id, uint16_t port)
12174 /* Don't respond to an ABORT with an ABORT. */
12175 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12177 sctp_m_freem(cause);
12180 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12181 mflowtype, mflowid, fibnum,
12187 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12188 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12189 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12190 uint32_t vrf_id, uint16_t port)
12192 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12193 mflowtype, mflowid, fibnum,
12198 static struct mbuf *
12199 sctp_copy_resume(struct uio *uio,
12201 int user_marks_eor,
12204 struct mbuf **new_tail)
12208 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12209 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12211 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12214 *sndout = m_length(m, NULL);
12215 *new_tail = m_last(m);
12221 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12225 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12227 if (sp->data == NULL) {
12228 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12231 sp->tail_mbuf = m_last(sp->data);
12237 static struct sctp_stream_queue_pending *
12238 sctp_copy_it_in(struct sctp_tcb *stcb,
12239 struct sctp_association *asoc,
12240 struct sctp_sndrcvinfo *srcv,
12242 struct sctp_nets *net,
12244 int user_marks_eor,
12248 * This routine must be very careful in its work. Protocol
12249 * processing is up and running so care must be taken to spl...()
12250 * when you need to do something that may effect the stcb/asoc. The
12251 * sb is locked however. When data is copied the protocol processing
12252 * should be enabled since this is a slower operation...
12254 struct sctp_stream_queue_pending *sp = NULL;
12258 /* Now can we send this? */
12259 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12260 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12261 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12262 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12263 /* got data while shutting down */
12264 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12265 *error = ECONNRESET;
12268 sctp_alloc_a_strmoq(stcb, sp);
12270 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12275 sp->sender_all_done = 0;
12276 sp->sinfo_flags = srcv->sinfo_flags;
12277 sp->timetolive = srcv->sinfo_timetolive;
12278 sp->ppid = srcv->sinfo_ppid;
12279 sp->context = srcv->sinfo_context;
12280 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12282 sp->stream = srcv->sinfo_stream;
12283 sp->length = min(uio->uio_resid, max_send_len);
12284 if ((sp->length == (uint32_t) uio->uio_resid) &&
12285 ((user_marks_eor == 0) ||
12286 (srcv->sinfo_flags & SCTP_EOF) ||
12287 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12288 sp->msg_is_complete = 1;
12290 sp->msg_is_complete = 0;
12292 sp->sender_all_done = 0;
12293 sp->some_taken = 0;
12294 sp->put_last_out = 0;
12295 resv_in_first = sizeof(struct sctp_data_chunk);
12296 sp->data = sp->tail_mbuf = NULL;
12297 if (sp->length == 0) {
12301 if (srcv->sinfo_keynumber_valid) {
12302 sp->auth_keyid = srcv->sinfo_keynumber;
12304 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12306 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12307 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12308 sp->holds_key_ref = 1;
12310 *error = sctp_copy_one(sp, uio, resv_in_first);
12313 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12316 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12318 atomic_add_int(&sp->net->ref_count, 1);
12322 sctp_set_prsctp_policy(sp);
12330 sctp_sosend(struct socket *so,
12331 struct sockaddr *addr,
12334 struct mbuf *control,
12339 int error, use_sndinfo = 0;
12340 struct sctp_sndrcvinfo sndrcvninfo;
12341 struct sockaddr *addr_to_use;
12343 #if defined(INET) && defined(INET6)
12344 struct sockaddr_in sin;
12349 /* process cmsg snd/rcv info (maybe a assoc-id) */
12350 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12351 sizeof(sndrcvninfo))) {
12356 addr_to_use = addr;
12357 #if defined(INET) && defined(INET6)
12358 if ((addr) && (addr->sa_family == AF_INET6)) {
12359 struct sockaddr_in6 *sin6;
12361 sin6 = (struct sockaddr_in6 *)addr;
12362 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12363 in6_sin6_2_sin(&sin, sin6);
12364 addr_to_use = (struct sockaddr *)&sin;
12368 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12371 use_sndinfo ? &sndrcvninfo : NULL
12379 sctp_lower_sosend(struct socket *so,
12380 struct sockaddr *addr,
12382 struct mbuf *i_pak,
12383 struct mbuf *control,
12385 struct sctp_sndrcvinfo *srcv
12390 unsigned int sndlen = 0, max_len;
12392 struct mbuf *top = NULL;
12393 int queue_only = 0, queue_only_for_init = 0;
12394 int free_cnt_applied = 0;
12396 int now_filled = 0;
12397 unsigned int inqueue_bytes = 0;
12398 struct sctp_block_entry be;
12399 struct sctp_inpcb *inp;
12400 struct sctp_tcb *stcb = NULL;
12401 struct timeval now;
12402 struct sctp_nets *net;
12403 struct sctp_association *asoc;
12404 struct sctp_inpcb *t_inp;
12405 int user_marks_eor;
12406 int create_lock_applied = 0;
12407 int nagle_applies = 0;
12408 int some_on_control = 0;
12409 int got_all_of_the_send = 0;
12410 int hold_tcblock = 0;
12411 int non_blocking = 0;
12412 uint32_t local_add_more, local_soresv = 0;
12414 uint16_t sinfo_flags;
12415 sctp_assoc_t sinfo_assoc_id;
12422 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12424 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12427 SCTP_RELEASE_PKT(i_pak);
12431 if ((uio == NULL) && (i_pak == NULL)) {
12432 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12435 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12436 atomic_add_int(&inp->total_sends, 1);
12438 if (uio->uio_resid < 0) {
12439 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12442 sndlen = uio->uio_resid;
12444 top = SCTP_HEADER_TO_CHAIN(i_pak);
12445 sndlen = SCTP_HEADER_LEN(i_pak);
12447 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12450 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12451 (inp->sctp_socket->so_qlimit)) {
12452 /* The listener can NOT send */
12453 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12458 * Pre-screen address, if one is given the sin-len
12459 * must be set correctly!
12462 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12464 switch (raddr->sa.sa_family) {
12467 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12468 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12472 port = raddr->sin.sin_port;
12477 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12478 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12482 port = raddr->sin6.sin6_port;
12486 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12487 error = EAFNOSUPPORT;
12494 sinfo_flags = srcv->sinfo_flags;
12495 sinfo_assoc_id = srcv->sinfo_assoc_id;
12496 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12497 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12498 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12502 if (srcv->sinfo_flags)
12503 SCTP_STAT_INCR(sctps_sends_with_flags);
12505 sinfo_flags = inp->def_send.sinfo_flags;
12506 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12508 if (sinfo_flags & SCTP_SENDALL) {
12509 /* its a sendall */
12510 error = sctp_sendall(inp, uio, top, srcv);
12514 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12515 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12519 /* now we must find the assoc */
12520 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12521 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12522 SCTP_INP_RLOCK(inp);
12523 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12525 SCTP_TCB_LOCK(stcb);
12528 SCTP_INP_RUNLOCK(inp);
12529 } else if (sinfo_assoc_id) {
12530 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12533 * Since we did not use findep we must
12534 * increment it, and if we don't find a tcb
12537 SCTP_INP_WLOCK(inp);
12538 SCTP_INP_INCR_REF(inp);
12539 SCTP_INP_WUNLOCK(inp);
12540 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12541 if (stcb == NULL) {
12542 SCTP_INP_WLOCK(inp);
12543 SCTP_INP_DECR_REF(inp);
12544 SCTP_INP_WUNLOCK(inp);
12549 if ((stcb == NULL) && (addr)) {
12550 /* Possible implicit send? */
12551 SCTP_ASOC_CREATE_LOCK(inp);
12552 create_lock_applied = 1;
12553 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12554 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12555 /* Should I really unlock ? */
12556 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12561 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12562 (addr->sa_family == AF_INET6)) {
12563 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12567 SCTP_INP_WLOCK(inp);
12568 SCTP_INP_INCR_REF(inp);
12569 SCTP_INP_WUNLOCK(inp);
12570 /* With the lock applied look again */
12571 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12572 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12573 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12575 if (stcb == NULL) {
12576 SCTP_INP_WLOCK(inp);
12577 SCTP_INP_DECR_REF(inp);
12578 SCTP_INP_WUNLOCK(inp);
12585 if (t_inp != inp) {
12586 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12591 if (stcb == NULL) {
12592 if (addr == NULL) {
12593 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12597 /* We must go ahead and start the INIT process */
12600 if ((sinfo_flags & SCTP_ABORT) ||
12601 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12603 * User asks to abort a non-existant assoc,
12604 * or EOF a non-existant assoc with no data
12606 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12610 /* get an asoc/stcb struct */
12611 vrf_id = inp->def_vrf_id;
12613 if (create_lock_applied == 0) {
12614 panic("Error, should hold create lock and I don't?");
12617 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12618 inp->sctp_ep.pre_open_stream_count,
12621 if (stcb == NULL) {
12622 /* Error is setup for us in the call */
12625 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12626 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12628 * Set the connected flag so we can queue
12631 soisconnecting(so);
12634 if (create_lock_applied) {
12635 SCTP_ASOC_CREATE_UNLOCK(inp);
12636 create_lock_applied = 0;
12638 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12641 * Turn on queue only flag to prevent data from
12645 asoc = &stcb->asoc;
12646 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12647 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12649 /* initialize authentication params for the assoc */
12650 sctp_initialize_auth_params(inp, stcb);
12653 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12654 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12655 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12661 /* out with the INIT */
12662 queue_only_for_init = 1;
12664 * we may want to dig in after this call and adjust the MTU
12665 * value. It defaulted to 1500 (constant) but the ro
12666 * structure may now have an update and thus we may need to
12667 * change it BEFORE we append the message.
12671 asoc = &stcb->asoc;
12673 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12674 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12676 net = sctp_findnet(stcb, addr);
12679 if ((net == NULL) ||
12680 ((port != 0) && (port != stcb->rport))) {
12681 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12686 if (stcb->asoc.alternate) {
12687 net = stcb->asoc.alternate;
12689 net = stcb->asoc.primary_destination;
12692 atomic_add_int(&stcb->total_sends, 1);
12693 /* Keep the stcb from being freed under our feet */
12694 atomic_add_int(&asoc->refcnt, 1);
12695 free_cnt_applied = 1;
12697 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12698 if (sndlen > asoc->smallest_mtu) {
12699 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12704 if (SCTP_SO_IS_NBIO(so)
12705 || (flags & MSG_NBIO)
12709 /* would we block? */
12710 if (non_blocking) {
12711 if (hold_tcblock == 0) {
12712 SCTP_TCB_LOCK(stcb);
12715 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12716 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12717 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12718 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12719 if (sndlen > SCTP_SB_LIMIT_SND(so))
12722 error = EWOULDBLOCK;
12725 stcb->asoc.sb_send_resv += sndlen;
12726 SCTP_TCB_UNLOCK(stcb);
12729 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12731 local_soresv = sndlen;
12732 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12733 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12734 error = ECONNRESET;
12737 if (create_lock_applied) {
12738 SCTP_ASOC_CREATE_UNLOCK(inp);
12739 create_lock_applied = 0;
12741 /* Is the stream no. valid? */
12742 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12743 /* Invalid stream number */
12744 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12748 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12749 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12751 * Can't queue any data while stream reset is underway.
12753 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12758 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12761 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12762 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12765 /* we are now done with all control */
12767 sctp_m_freem(control);
12770 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12771 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12772 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12773 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12774 if (srcv->sinfo_flags & SCTP_ABORT) {
12777 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12778 error = ECONNRESET;
12782 /* Ok, we will attempt a msgsnd :> */
12784 p->td_ru.ru_msgsnd++;
12786 /* Are we aborting? */
12787 if (srcv->sinfo_flags & SCTP_ABORT) {
12789 int tot_demand, tot_out = 0, max_out;
12791 SCTP_STAT_INCR(sctps_sends_with_abort);
12792 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12793 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12794 /* It has to be up before we abort */
12795 /* how big is the user initiated abort? */
12796 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12800 if (hold_tcblock) {
12801 SCTP_TCB_UNLOCK(stcb);
12805 struct mbuf *cntm = NULL;
12807 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12809 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12810 tot_out += SCTP_BUF_LEN(cntm);
12814 /* Must fit in a MTU */
12816 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12817 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12819 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12823 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12826 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12830 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12831 max_out -= sizeof(struct sctp_abort_msg);
12832 if (tot_out > max_out) {
12836 struct sctp_paramhdr *ph;
12838 /* now move forward the data pointer */
12839 ph = mtod(mm, struct sctp_paramhdr *);
12840 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12841 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
12843 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12845 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12848 * Here if we can't get his data we
12849 * still abort we just don't get to
12850 * send the users note :-0
12857 SCTP_BUF_NEXT(mm) = top;
12861 if (hold_tcblock == 0) {
12862 SCTP_TCB_LOCK(stcb);
12864 atomic_add_int(&stcb->asoc.refcnt, -1);
12865 free_cnt_applied = 0;
12866 /* release this lock, otherwise we hang on ourselves */
12867 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12868 /* now relock the stcb so everything is sane */
12872 * In this case top is already chained to mm avoid double
12873 * free, since we free it below if top != NULL and driver
12874 * would free it after sending the packet out
12881 /* Calculate the maximum we can send */
12882 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12883 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12884 if (non_blocking) {
12885 /* we already checked for non-blocking above. */
12888 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12893 if (hold_tcblock) {
12894 SCTP_TCB_UNLOCK(stcb);
12897 if (asoc->strmout == NULL) {
12898 /* huh? software error */
12899 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12903 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12904 if ((user_marks_eor == 0) &&
12905 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12906 /* It will NEVER fit */
12907 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12911 if ((uio == NULL) && user_marks_eor) {
12913 * We do not support eeor mode for
12914 * sending with mbuf chains (like sendfile).
12916 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12920 if (user_marks_eor) {
12921 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12924 * For non-eeor the whole message must fit in
12925 * the socket send buffer.
12927 local_add_more = sndlen;
12930 if (non_blocking) {
12931 goto skip_preblock;
12933 if (((max_len <= local_add_more) &&
12934 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12936 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12937 /* No room right now ! */
12938 SOCKBUF_LOCK(&so->so_snd);
12939 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12940 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12941 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12942 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12943 (unsigned int)SCTP_SB_LIMIT_SND(so),
12946 stcb->asoc.stream_queue_cnt,
12947 stcb->asoc.chunks_on_out_queue,
12948 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12949 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12950 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
12953 stcb->block_entry = &be;
12954 error = sbwait(&so->so_snd);
12955 stcb->block_entry = NULL;
12956 if (error || so->so_error || be.error) {
12959 error = so->so_error;
12964 SOCKBUF_UNLOCK(&so->so_snd);
12967 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12968 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12969 asoc, stcb->asoc.total_output_queue_size);
12971 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12974 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12976 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12977 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12981 SOCKBUF_UNLOCK(&so->so_snd);
12984 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12988 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
12989 * case NOTE: uio will be null when top/mbuf is passed
12992 if (srcv->sinfo_flags & SCTP_EOF) {
12993 got_all_of_the_send = 1;
12996 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13002 struct sctp_stream_queue_pending *sp;
13003 struct sctp_stream_out *strm;
13006 SCTP_TCB_SEND_LOCK(stcb);
13007 if ((asoc->stream_locked) &&
13008 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13009 SCTP_TCB_SEND_UNLOCK(stcb);
13010 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13014 SCTP_TCB_SEND_UNLOCK(stcb);
13016 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13017 if (strm->last_msg_incomplete == 0) {
13019 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13020 if ((sp == NULL) || (error)) {
13023 SCTP_TCB_SEND_LOCK(stcb);
13024 if (sp->msg_is_complete) {
13025 strm->last_msg_incomplete = 0;
13026 asoc->stream_locked = 0;
13029 * Just got locked to this guy in case of an
13032 strm->last_msg_incomplete = 1;
13033 asoc->stream_locked = 1;
13034 asoc->stream_locked_on = srcv->sinfo_stream;
13035 sp->sender_all_done = 0;
13037 sctp_snd_sb_alloc(stcb, sp->length);
13038 atomic_add_int(&asoc->stream_queue_cnt, 1);
13039 if (srcv->sinfo_flags & SCTP_UNORDERED) {
13040 SCTP_STAT_INCR(sctps_sends_with_unord);
13042 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13043 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13044 SCTP_TCB_SEND_UNLOCK(stcb);
13046 SCTP_TCB_SEND_LOCK(stcb);
13047 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13048 SCTP_TCB_SEND_UNLOCK(stcb);
13050 /* ???? Huh ??? last msg is gone */
13052 panic("Warning: Last msg marked incomplete, yet nothing left?");
13054 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13055 strm->last_msg_incomplete = 0;
13061 while (uio->uio_resid > 0) {
13062 /* How much room do we have? */
13063 struct mbuf *new_tail, *mm;
13065 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13066 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
13070 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13071 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13072 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13075 if (hold_tcblock) {
13076 SCTP_TCB_UNLOCK(stcb);
13079 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13080 if ((mm == NULL) || error) {
13086 /* Update the mbuf and count */
13087 SCTP_TCB_SEND_LOCK(stcb);
13088 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13090 * we need to get out. Peer probably
13094 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13095 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13096 error = ECONNRESET;
13098 SCTP_TCB_SEND_UNLOCK(stcb);
13101 if (sp->tail_mbuf) {
13102 /* tack it to the end */
13103 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13104 sp->tail_mbuf = new_tail;
13106 /* A stolen mbuf */
13108 sp->tail_mbuf = new_tail;
13110 sctp_snd_sb_alloc(stcb, sndout);
13111 atomic_add_int(&sp->length, sndout);
13114 /* Did we reach EOR? */
13115 if ((uio->uio_resid == 0) &&
13116 ((user_marks_eor == 0) ||
13117 (srcv->sinfo_flags & SCTP_EOF) ||
13118 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13119 sp->msg_is_complete = 1;
13121 sp->msg_is_complete = 0;
13123 SCTP_TCB_SEND_UNLOCK(stcb);
13125 if (uio->uio_resid == 0) {
13130 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13132 * This is ugly but we must assure locking
13135 if (hold_tcblock == 0) {
13136 SCTP_TCB_LOCK(stcb);
13139 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13140 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13141 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13142 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13148 SCTP_TCB_UNLOCK(stcb);
13151 /* wait for space now */
13152 if (non_blocking) {
13153 /* Non-blocking io in place out */
13156 /* What about the INIT, send it maybe */
13157 if (queue_only_for_init) {
13158 if (hold_tcblock == 0) {
13159 SCTP_TCB_LOCK(stcb);
13162 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13163 /* a collision took us forward? */
13166 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13167 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13171 if ((net->flight_size > net->cwnd) &&
13172 (asoc->sctp_cmt_on_off == 0)) {
13173 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13175 } else if (asoc->ifp_had_enobuf) {
13176 SCTP_STAT_INCR(sctps_ifnomemqueued);
13177 if (net->flight_size > (2 * net->mtu)) {
13180 asoc->ifp_had_enobuf = 0;
13182 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13183 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13184 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13185 (stcb->asoc.total_flight > 0) &&
13186 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13187 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13190 * Ok, Nagle is set on and we have data outstanding.
13191 * Don't send anything and let SACKs drive out the
13192 * data unless we have a "full" segment to send.
13194 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13195 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13197 SCTP_STAT_INCR(sctps_naglequeued);
13200 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13201 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13202 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13204 SCTP_STAT_INCR(sctps_naglesent);
13207 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13209 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13210 nagle_applies, un_sent);
13211 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13212 stcb->asoc.total_flight,
13213 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13215 if (queue_only_for_init)
13216 queue_only_for_init = 0;
13217 if ((queue_only == 0) && (nagle_applies == 0)) {
13219 * need to start chunk output
13220 * before blocking.. note that if
13221 * a lock is already applied, then
13222 * the input via the net is happening
13223 * and I don't need to start output :-D
13225 if (hold_tcblock == 0) {
13226 if (SCTP_TCB_TRYLOCK(stcb)) {
13228 sctp_chunk_output(inp,
13230 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13233 sctp_chunk_output(inp,
13235 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13237 if (hold_tcblock == 1) {
13238 SCTP_TCB_UNLOCK(stcb);
13242 SOCKBUF_LOCK(&so->so_snd);
13244 * This is a bit strange, but I think it will
13245 * work. The total_output_queue_size is locked and
13246 * protected by the TCB_LOCK, which we just released.
13247 * There is a race that can occur between releasing it
13248 * above, and me getting the socket lock, where sacks
13249 * come in but we have not put the SB_WAIT on the
13250 * so_snd buffer to get the wakeup. After the LOCK
13251 * is applied the sack_processing will also need to
13252 * LOCK the so->so_snd to do the actual sowwakeup(). So
13253 * once we have the socket buffer lock if we recheck the
13254 * size we KNOW we will get to sleep safely with the
13255 * wakeup flag in place.
13257 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13258 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13259 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13260 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13261 asoc, uio->uio_resid);
13264 stcb->block_entry = &be;
13265 error = sbwait(&so->so_snd);
13266 stcb->block_entry = NULL;
13268 if (error || so->so_error || be.error) {
13271 error = so->so_error;
13276 SOCKBUF_UNLOCK(&so->so_snd);
13279 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13280 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13281 asoc, stcb->asoc.total_output_queue_size);
13284 SOCKBUF_UNLOCK(&so->so_snd);
13285 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13289 SCTP_TCB_SEND_LOCK(stcb);
13291 if (sp->msg_is_complete == 0) {
13292 strm->last_msg_incomplete = 1;
13293 asoc->stream_locked = 1;
13294 asoc->stream_locked_on = srcv->sinfo_stream;
13296 sp->sender_all_done = 1;
13297 strm->last_msg_incomplete = 0;
13298 asoc->stream_locked = 0;
13301 SCTP_PRINTF("Huh no sp TSNH?\n");
13302 strm->last_msg_incomplete = 0;
13303 asoc->stream_locked = 0;
13305 SCTP_TCB_SEND_UNLOCK(stcb);
13306 if (uio->uio_resid == 0) {
13307 got_all_of_the_send = 1;
13310 /* We send in a 0, since we do NOT have any locks */
13311 error = sctp_msg_append(stcb, net, top, srcv, 0);
13313 if (srcv->sinfo_flags & SCTP_EOF) {
13315 * This should only happen for Panda for the mbuf
13316 * send case, which does NOT yet support EEOR mode.
13317 * Thus, we can just set this flag to do the proper
13320 got_all_of_the_send = 1;
13328 if ((srcv->sinfo_flags & SCTP_EOF) &&
13329 (got_all_of_the_send == 1)) {
13332 SCTP_STAT_INCR(sctps_sends_with_eof);
13334 if (hold_tcblock == 0) {
13335 SCTP_TCB_LOCK(stcb);
13338 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13339 if (TAILQ_EMPTY(&asoc->send_queue) &&
13340 TAILQ_EMPTY(&asoc->sent_queue) &&
13342 if (asoc->locked_on_sending) {
13345 /* there is nothing queued to send, so I'm done... */
13346 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13347 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13348 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13349 struct sctp_nets *netp;
13351 /* only send SHUTDOWN the first time through */
13352 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13353 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13355 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13356 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13357 sctp_stop_timers_for_shutdown(stcb);
13358 if (stcb->asoc.alternate) {
13359 netp = stcb->asoc.alternate;
13361 netp = stcb->asoc.primary_destination;
13363 sctp_send_shutdown(stcb, netp);
13364 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13366 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13367 asoc->primary_destination);
13371 * we still got (or just got) data to send, so set
13375 * XXX sockets draft says that SCTP_EOF should be
13376 * sent with no data. currently, we will allow user
13377 * data to be sent first and move to
13380 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13381 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13382 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13383 if (hold_tcblock == 0) {
13384 SCTP_TCB_LOCK(stcb);
13387 if (asoc->locked_on_sending) {
13388 /* Locked to send out the data */
13389 struct sctp_stream_queue_pending *sp;
13391 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13393 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13394 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13397 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13398 if (TAILQ_EMPTY(&asoc->send_queue) &&
13399 TAILQ_EMPTY(&asoc->sent_queue) &&
13400 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13401 struct mbuf *op_err;
13402 char msg[SCTP_DIAG_INFO_LEN];
13405 if (free_cnt_applied) {
13406 atomic_add_int(&stcb->asoc.refcnt, -1);
13407 free_cnt_applied = 0;
13409 snprintf(msg, sizeof(msg),
13410 "%s:%d at %s", __FILE__, __LINE__, __func__);
13411 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13413 sctp_abort_an_association(stcb->sctp_ep, stcb,
13414 op_err, SCTP_SO_LOCKED);
13416 * now relock the stcb so everything
13423 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13424 asoc->primary_destination);
13425 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13430 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13431 some_on_control = 1;
13433 if (queue_only_for_init) {
13434 if (hold_tcblock == 0) {
13435 SCTP_TCB_LOCK(stcb);
13438 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13439 /* a collision took us forward? */
13442 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13443 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13447 if ((net->flight_size > net->cwnd) &&
13448 (stcb->asoc.sctp_cmt_on_off == 0)) {
13449 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13451 } else if (asoc->ifp_had_enobuf) {
13452 SCTP_STAT_INCR(sctps_ifnomemqueued);
13453 if (net->flight_size > (2 * net->mtu)) {
13456 asoc->ifp_had_enobuf = 0;
13458 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13459 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13460 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13461 (stcb->asoc.total_flight > 0) &&
13462 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13463 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13465 * Ok, Nagle is set on and we have data outstanding.
13466 * Don't send anything and let SACKs drive out the
13467 * data unless wen have a "full" segment to send.
13469 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13470 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13472 SCTP_STAT_INCR(sctps_naglequeued);
13475 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13476 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13477 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13479 SCTP_STAT_INCR(sctps_naglesent);
13482 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13483 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13484 nagle_applies, un_sent);
13485 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13486 stcb->asoc.total_flight,
13487 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13489 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13490 /* we can attempt to send too. */
13491 if (hold_tcblock == 0) {
13493 * If there is activity recv'ing sacks no need to
13496 if (SCTP_TCB_TRYLOCK(stcb)) {
13497 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13501 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13503 } else if ((queue_only == 0) &&
13504 (stcb->asoc.peers_rwnd == 0) &&
13505 (stcb->asoc.total_flight == 0)) {
13506 /* We get to have a probe outstanding */
13507 if (hold_tcblock == 0) {
13509 SCTP_TCB_LOCK(stcb);
13511 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13512 } else if (some_on_control) {
13513 int num_out, reason, frag_point;
13515 /* Here we do control only */
13516 if (hold_tcblock == 0) {
13518 SCTP_TCB_LOCK(stcb);
13520 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13521 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13522 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13524 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13525 queue_only, stcb->asoc.peers_rwnd, un_sent,
13526 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13527 stcb->asoc.total_output_queue_size, error);
13532 if (local_soresv && stcb) {
13533 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13535 if (create_lock_applied) {
13536 SCTP_ASOC_CREATE_UNLOCK(inp);
13538 if ((stcb) && hold_tcblock) {
13539 SCTP_TCB_UNLOCK(stcb);
13541 if (stcb && free_cnt_applied) {
13542 atomic_add_int(&stcb->asoc.refcnt, -1);
13546 if (mtx_owned(&stcb->tcb_mtx)) {
13547 panic("Leaving with tcb mtx owned?");
13549 if (mtx_owned(&stcb->tcb_send_mtx)) {
13550 panic("Leaving with tcb send mtx owned?");
13558 sctp_m_freem(control);
13565 * generate an AUTHentication chunk, if required
13568 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13569 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13570 struct sctp_tcb *stcb, uint8_t chunk)
13572 struct mbuf *m_auth;
13573 struct sctp_auth_chunk *auth;
13577 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13581 if (stcb->asoc.auth_supported == 0) {
13584 /* does the requested chunk require auth? */
13585 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13588 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13589 if (m_auth == NULL) {
13593 /* reserve some space if this will be the first mbuf */
13595 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13596 /* fill in the AUTH chunk details */
13597 auth = mtod(m_auth, struct sctp_auth_chunk *);
13598 bzero(auth, sizeof(*auth));
13599 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13600 auth->ch.chunk_flags = 0;
13601 chunk_len = sizeof(*auth) +
13602 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13603 auth->ch.chunk_length = htons(chunk_len);
13604 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13605 /* key id and hmac digest will be computed and filled in upon send */
13607 /* save the offset where the auth was inserted into the chain */
13609 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13610 *offset += SCTP_BUF_LEN(cn);
13613 /* update length and return pointer to the auth chunk */
13614 SCTP_BUF_LEN(m_auth) = chunk_len;
13615 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13616 if (auth_ret != NULL)
13624 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13626 struct nd_prefix *pfx = NULL;
13627 struct nd_pfxrouter *pfxrtr = NULL;
13628 struct sockaddr_in6 gw6;
13630 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13633 /* get prefix entry of address */
13634 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13635 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13637 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13638 &src6->sin6_addr, &pfx->ndpr_mask))
13641 /* no prefix entry in the prefix list */
13643 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13644 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13647 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13648 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13650 /* search installed gateway from prefix entry */
13651 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13652 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13653 gw6.sin6_family = AF_INET6;
13654 gw6.sin6_len = sizeof(struct sockaddr_in6);
13655 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13656 sizeof(struct in6_addr));
13657 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13658 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13659 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13660 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13661 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13662 ro->ro_rt->rt_gateway)) {
13663 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13667 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13674 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13677 struct sockaddr_in *sin, *mask;
13678 struct ifaddr *ifa;
13679 struct in_addr srcnetaddr, gwnetaddr;
13681 if (ro == NULL || ro->ro_rt == NULL ||
13682 sifa->address.sa.sa_family != AF_INET) {
13685 ifa = (struct ifaddr *)sifa->ifa;
13686 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13687 sin = &sifa->address.sin;
13688 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13689 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13690 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13691 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13693 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13694 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13695 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13696 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13697 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13698 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {