2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
7 * a) Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
10 * b) Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the distribution.
14 * c) Neither the name of Cisco Systems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
31 /* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */
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 #include <netinet/udp.h>
54 #include <machine/in_cksum.h>
58 #define SCTP_MAX_GAPS_INARRAY 4
60 uint8_t right_edge; /* mergable on the right edge */
61 uint8_t left_edge; /* mergable on the left edge */
64 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
67 struct sack_track sack_array[256] = {
68 {0, 0, 0, 0, /* 0x00 */
75 {1, 0, 1, 0, /* 0x01 */
82 {0, 0, 1, 0, /* 0x02 */
89 {1, 0, 1, 0, /* 0x03 */
96 {0, 0, 1, 0, /* 0x04 */
103 {1, 0, 2, 0, /* 0x05 */
110 {0, 0, 1, 0, /* 0x06 */
117 {1, 0, 1, 0, /* 0x07 */
124 {0, 0, 1, 0, /* 0x08 */
131 {1, 0, 2, 0, /* 0x09 */
138 {0, 0, 2, 0, /* 0x0a */
145 {1, 0, 2, 0, /* 0x0b */
152 {0, 0, 1, 0, /* 0x0c */
159 {1, 0, 2, 0, /* 0x0d */
166 {0, 0, 1, 0, /* 0x0e */
173 {1, 0, 1, 0, /* 0x0f */
180 {0, 0, 1, 0, /* 0x10 */
187 {1, 0, 2, 0, /* 0x11 */
194 {0, 0, 2, 0, /* 0x12 */
201 {1, 0, 2, 0, /* 0x13 */
208 {0, 0, 2, 0, /* 0x14 */
215 {1, 0, 3, 0, /* 0x15 */
222 {0, 0, 2, 0, /* 0x16 */
229 {1, 0, 2, 0, /* 0x17 */
236 {0, 0, 1, 0, /* 0x18 */
243 {1, 0, 2, 0, /* 0x19 */
250 {0, 0, 2, 0, /* 0x1a */
257 {1, 0, 2, 0, /* 0x1b */
264 {0, 0, 1, 0, /* 0x1c */
271 {1, 0, 2, 0, /* 0x1d */
278 {0, 0, 1, 0, /* 0x1e */
285 {1, 0, 1, 0, /* 0x1f */
292 {0, 0, 1, 0, /* 0x20 */
299 {1, 0, 2, 0, /* 0x21 */
306 {0, 0, 2, 0, /* 0x22 */
313 {1, 0, 2, 0, /* 0x23 */
320 {0, 0, 2, 0, /* 0x24 */
327 {1, 0, 3, 0, /* 0x25 */
334 {0, 0, 2, 0, /* 0x26 */
341 {1, 0, 2, 0, /* 0x27 */
348 {0, 0, 2, 0, /* 0x28 */
355 {1, 0, 3, 0, /* 0x29 */
362 {0, 0, 3, 0, /* 0x2a */
369 {1, 0, 3, 0, /* 0x2b */
376 {0, 0, 2, 0, /* 0x2c */
383 {1, 0, 3, 0, /* 0x2d */
390 {0, 0, 2, 0, /* 0x2e */
397 {1, 0, 2, 0, /* 0x2f */
404 {0, 0, 1, 0, /* 0x30 */
411 {1, 0, 2, 0, /* 0x31 */
418 {0, 0, 2, 0, /* 0x32 */
425 {1, 0, 2, 0, /* 0x33 */
432 {0, 0, 2, 0, /* 0x34 */
439 {1, 0, 3, 0, /* 0x35 */
446 {0, 0, 2, 0, /* 0x36 */
453 {1, 0, 2, 0, /* 0x37 */
460 {0, 0, 1, 0, /* 0x38 */
467 {1, 0, 2, 0, /* 0x39 */
474 {0, 0, 2, 0, /* 0x3a */
481 {1, 0, 2, 0, /* 0x3b */
488 {0, 0, 1, 0, /* 0x3c */
495 {1, 0, 2, 0, /* 0x3d */
502 {0, 0, 1, 0, /* 0x3e */
509 {1, 0, 1, 0, /* 0x3f */
516 {0, 0, 1, 0, /* 0x40 */
523 {1, 0, 2, 0, /* 0x41 */
530 {0, 0, 2, 0, /* 0x42 */
537 {1, 0, 2, 0, /* 0x43 */
544 {0, 0, 2, 0, /* 0x44 */
551 {1, 0, 3, 0, /* 0x45 */
558 {0, 0, 2, 0, /* 0x46 */
565 {1, 0, 2, 0, /* 0x47 */
572 {0, 0, 2, 0, /* 0x48 */
579 {1, 0, 3, 0, /* 0x49 */
586 {0, 0, 3, 0, /* 0x4a */
593 {1, 0, 3, 0, /* 0x4b */
600 {0, 0, 2, 0, /* 0x4c */
607 {1, 0, 3, 0, /* 0x4d */
614 {0, 0, 2, 0, /* 0x4e */
621 {1, 0, 2, 0, /* 0x4f */
628 {0, 0, 2, 0, /* 0x50 */
635 {1, 0, 3, 0, /* 0x51 */
642 {0, 0, 3, 0, /* 0x52 */
649 {1, 0, 3, 0, /* 0x53 */
656 {0, 0, 3, 0, /* 0x54 */
663 {1, 0, 4, 0, /* 0x55 */
670 {0, 0, 3, 0, /* 0x56 */
677 {1, 0, 3, 0, /* 0x57 */
684 {0, 0, 2, 0, /* 0x58 */
691 {1, 0, 3, 0, /* 0x59 */
698 {0, 0, 3, 0, /* 0x5a */
705 {1, 0, 3, 0, /* 0x5b */
712 {0, 0, 2, 0, /* 0x5c */
719 {1, 0, 3, 0, /* 0x5d */
726 {0, 0, 2, 0, /* 0x5e */
733 {1, 0, 2, 0, /* 0x5f */
740 {0, 0, 1, 0, /* 0x60 */
747 {1, 0, 2, 0, /* 0x61 */
754 {0, 0, 2, 0, /* 0x62 */
761 {1, 0, 2, 0, /* 0x63 */
768 {0, 0, 2, 0, /* 0x64 */
775 {1, 0, 3, 0, /* 0x65 */
782 {0, 0, 2, 0, /* 0x66 */
789 {1, 0, 2, 0, /* 0x67 */
796 {0, 0, 2, 0, /* 0x68 */
803 {1, 0, 3, 0, /* 0x69 */
810 {0, 0, 3, 0, /* 0x6a */
817 {1, 0, 3, 0, /* 0x6b */
824 {0, 0, 2, 0, /* 0x6c */
831 {1, 0, 3, 0, /* 0x6d */
838 {0, 0, 2, 0, /* 0x6e */
845 {1, 0, 2, 0, /* 0x6f */
852 {0, 0, 1, 0, /* 0x70 */
859 {1, 0, 2, 0, /* 0x71 */
866 {0, 0, 2, 0, /* 0x72 */
873 {1, 0, 2, 0, /* 0x73 */
880 {0, 0, 2, 0, /* 0x74 */
887 {1, 0, 3, 0, /* 0x75 */
894 {0, 0, 2, 0, /* 0x76 */
901 {1, 0, 2, 0, /* 0x77 */
908 {0, 0, 1, 0, /* 0x78 */
915 {1, 0, 2, 0, /* 0x79 */
922 {0, 0, 2, 0, /* 0x7a */
929 {1, 0, 2, 0, /* 0x7b */
936 {0, 0, 1, 0, /* 0x7c */
943 {1, 0, 2, 0, /* 0x7d */
950 {0, 0, 1, 0, /* 0x7e */
957 {1, 0, 1, 0, /* 0x7f */
964 {0, 1, 1, 0, /* 0x80 */
971 {1, 1, 2, 0, /* 0x81 */
978 {0, 1, 2, 0, /* 0x82 */
985 {1, 1, 2, 0, /* 0x83 */
992 {0, 1, 2, 0, /* 0x84 */
999 {1, 1, 3, 0, /* 0x85 */
1006 {0, 1, 2, 0, /* 0x86 */
1013 {1, 1, 2, 0, /* 0x87 */
1020 {0, 1, 2, 0, /* 0x88 */
1027 {1, 1, 3, 0, /* 0x89 */
1034 {0, 1, 3, 0, /* 0x8a */
1041 {1, 1, 3, 0, /* 0x8b */
1048 {0, 1, 2, 0, /* 0x8c */
1055 {1, 1, 3, 0, /* 0x8d */
1062 {0, 1, 2, 0, /* 0x8e */
1069 {1, 1, 2, 0, /* 0x8f */
1076 {0, 1, 2, 0, /* 0x90 */
1083 {1, 1, 3, 0, /* 0x91 */
1090 {0, 1, 3, 0, /* 0x92 */
1097 {1, 1, 3, 0, /* 0x93 */
1104 {0, 1, 3, 0, /* 0x94 */
1111 {1, 1, 4, 0, /* 0x95 */
1118 {0, 1, 3, 0, /* 0x96 */
1125 {1, 1, 3, 0, /* 0x97 */
1132 {0, 1, 2, 0, /* 0x98 */
1139 {1, 1, 3, 0, /* 0x99 */
1146 {0, 1, 3, 0, /* 0x9a */
1153 {1, 1, 3, 0, /* 0x9b */
1160 {0, 1, 2, 0, /* 0x9c */
1167 {1, 1, 3, 0, /* 0x9d */
1174 {0, 1, 2, 0, /* 0x9e */
1181 {1, 1, 2, 0, /* 0x9f */
1188 {0, 1, 2, 0, /* 0xa0 */
1195 {1, 1, 3, 0, /* 0xa1 */
1202 {0, 1, 3, 0, /* 0xa2 */
1209 {1, 1, 3, 0, /* 0xa3 */
1216 {0, 1, 3, 0, /* 0xa4 */
1223 {1, 1, 4, 0, /* 0xa5 */
1230 {0, 1, 3, 0, /* 0xa6 */
1237 {1, 1, 3, 0, /* 0xa7 */
1244 {0, 1, 3, 0, /* 0xa8 */
1251 {1, 1, 4, 0, /* 0xa9 */
1258 {0, 1, 4, 0, /* 0xaa */
1265 {1, 1, 4, 0, /* 0xab */
1272 {0, 1, 3, 0, /* 0xac */
1279 {1, 1, 4, 0, /* 0xad */
1286 {0, 1, 3, 0, /* 0xae */
1293 {1, 1, 3, 0, /* 0xaf */
1300 {0, 1, 2, 0, /* 0xb0 */
1307 {1, 1, 3, 0, /* 0xb1 */
1314 {0, 1, 3, 0, /* 0xb2 */
1321 {1, 1, 3, 0, /* 0xb3 */
1328 {0, 1, 3, 0, /* 0xb4 */
1335 {1, 1, 4, 0, /* 0xb5 */
1342 {0, 1, 3, 0, /* 0xb6 */
1349 {1, 1, 3, 0, /* 0xb7 */
1356 {0, 1, 2, 0, /* 0xb8 */
1363 {1, 1, 3, 0, /* 0xb9 */
1370 {0, 1, 3, 0, /* 0xba */
1377 {1, 1, 3, 0, /* 0xbb */
1384 {0, 1, 2, 0, /* 0xbc */
1391 {1, 1, 3, 0, /* 0xbd */
1398 {0, 1, 2, 0, /* 0xbe */
1405 {1, 1, 2, 0, /* 0xbf */
1412 {0, 1, 1, 0, /* 0xc0 */
1419 {1, 1, 2, 0, /* 0xc1 */
1426 {0, 1, 2, 0, /* 0xc2 */
1433 {1, 1, 2, 0, /* 0xc3 */
1440 {0, 1, 2, 0, /* 0xc4 */
1447 {1, 1, 3, 0, /* 0xc5 */
1454 {0, 1, 2, 0, /* 0xc6 */
1461 {1, 1, 2, 0, /* 0xc7 */
1468 {0, 1, 2, 0, /* 0xc8 */
1475 {1, 1, 3, 0, /* 0xc9 */
1482 {0, 1, 3, 0, /* 0xca */
1489 {1, 1, 3, 0, /* 0xcb */
1496 {0, 1, 2, 0, /* 0xcc */
1503 {1, 1, 3, 0, /* 0xcd */
1510 {0, 1, 2, 0, /* 0xce */
1517 {1, 1, 2, 0, /* 0xcf */
1524 {0, 1, 2, 0, /* 0xd0 */
1531 {1, 1, 3, 0, /* 0xd1 */
1538 {0, 1, 3, 0, /* 0xd2 */
1545 {1, 1, 3, 0, /* 0xd3 */
1552 {0, 1, 3, 0, /* 0xd4 */
1559 {1, 1, 4, 0, /* 0xd5 */
1566 {0, 1, 3, 0, /* 0xd6 */
1573 {1, 1, 3, 0, /* 0xd7 */
1580 {0, 1, 2, 0, /* 0xd8 */
1587 {1, 1, 3, 0, /* 0xd9 */
1594 {0, 1, 3, 0, /* 0xda */
1601 {1, 1, 3, 0, /* 0xdb */
1608 {0, 1, 2, 0, /* 0xdc */
1615 {1, 1, 3, 0, /* 0xdd */
1622 {0, 1, 2, 0, /* 0xde */
1629 {1, 1, 2, 0, /* 0xdf */
1636 {0, 1, 1, 0, /* 0xe0 */
1643 {1, 1, 2, 0, /* 0xe1 */
1650 {0, 1, 2, 0, /* 0xe2 */
1657 {1, 1, 2, 0, /* 0xe3 */
1664 {0, 1, 2, 0, /* 0xe4 */
1671 {1, 1, 3, 0, /* 0xe5 */
1678 {0, 1, 2, 0, /* 0xe6 */
1685 {1, 1, 2, 0, /* 0xe7 */
1692 {0, 1, 2, 0, /* 0xe8 */
1699 {1, 1, 3, 0, /* 0xe9 */
1706 {0, 1, 3, 0, /* 0xea */
1713 {1, 1, 3, 0, /* 0xeb */
1720 {0, 1, 2, 0, /* 0xec */
1727 {1, 1, 3, 0, /* 0xed */
1734 {0, 1, 2, 0, /* 0xee */
1741 {1, 1, 2, 0, /* 0xef */
1748 {0, 1, 1, 0, /* 0xf0 */
1755 {1, 1, 2, 0, /* 0xf1 */
1762 {0, 1, 2, 0, /* 0xf2 */
1769 {1, 1, 2, 0, /* 0xf3 */
1776 {0, 1, 2, 0, /* 0xf4 */
1783 {1, 1, 3, 0, /* 0xf5 */
1790 {0, 1, 2, 0, /* 0xf6 */
1797 {1, 1, 2, 0, /* 0xf7 */
1804 {0, 1, 1, 0, /* 0xf8 */
1811 {1, 1, 2, 0, /* 0xf9 */
1818 {0, 1, 2, 0, /* 0xfa */
1825 {1, 1, 2, 0, /* 0xfb */
1832 {0, 1, 1, 0, /* 0xfc */
1839 {1, 1, 2, 0, /* 0xfd */
1846 {0, 1, 1, 0, /* 0xfe */
1853 {1, 1, 1, 0, /* 0xff */
1864 sctp_is_address_in_scope(struct sctp_ifa *ifa,
1865 int ipv4_addr_legal,
1866 int ipv6_addr_legal,
1868 int ipv4_local_scope,
1873 if ((loopback_scope == 0) &&
1874 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1876 * skip loopback if not in scope *
1880 switch (ifa->address.sa.sa_family) {
1882 if (ipv4_addr_legal) {
1883 struct sockaddr_in *sin;
1885 sin = (struct sockaddr_in *)&ifa->address.sin;
1886 if (sin->sin_addr.s_addr == 0) {
1887 /* not in scope , unspecified */
1890 if ((ipv4_local_scope == 0) &&
1891 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1892 /* private address not in scope */
1901 if (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 = (struct sockaddr_in6 *)&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 ((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)
1942 struct sctp_paramhdr *parmh;
1946 if (ifa->address.sa.sa_family == AF_INET) {
1947 len = sizeof(struct sctp_ipv4addr_param);
1948 } else if (ifa->address.sa.sa_family == AF_INET6) {
1949 len = sizeof(struct sctp_ipv6addr_param);
1954 if (M_TRAILINGSPACE(m) >= len) {
1955 /* easy side we just drop it on the end */
1956 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1959 /* Need more space */
1961 while (SCTP_BUF_NEXT(mret) != NULL) {
1962 mret = SCTP_BUF_NEXT(mret);
1964 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(len, 0, M_DONTWAIT, 1, MT_DATA);
1965 if (SCTP_BUF_NEXT(mret) == NULL) {
1966 /* We are hosed, can't add more addresses */
1969 mret = SCTP_BUF_NEXT(mret);
1970 parmh = mtod(mret, struct sctp_paramhdr *);
1972 /* now add the parameter */
1973 switch (ifa->address.sa.sa_family) {
1976 struct sctp_ipv4addr_param *ipv4p;
1977 struct sockaddr_in *sin;
1979 sin = (struct sockaddr_in *)&ifa->address.sin;
1980 ipv4p = (struct sctp_ipv4addr_param *)parmh;
1981 parmh->param_type = htons(SCTP_IPV4_ADDRESS);
1982 parmh->param_length = htons(len);
1983 ipv4p->addr = sin->sin_addr.s_addr;
1984 SCTP_BUF_LEN(mret) += len;
1990 struct sctp_ipv6addr_param *ipv6p;
1991 struct sockaddr_in6 *sin6;
1993 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
1994 ipv6p = (struct sctp_ipv6addr_param *)parmh;
1995 parmh->param_type = htons(SCTP_IPV6_ADDRESS);
1996 parmh->param_length = htons(len);
1997 memcpy(ipv6p->addr, &sin6->sin6_addr,
1998 sizeof(ipv6p->addr));
1999 /* clear embedded scope in the address */
2000 in6_clearscope((struct in6_addr *)ipv6p->addr);
2001 SCTP_BUF_LEN(mret) += len;
2013 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_scoping *scope,
2014 struct mbuf *m_at, int cnt_inits_to)
2016 struct sctp_vrf *vrf = NULL;
2017 int cnt, limit_out = 0, total_count;
2020 vrf_id = inp->def_vrf_id;
2021 SCTP_IPI_ADDR_RLOCK();
2022 vrf = sctp_find_vrf(vrf_id);
2024 SCTP_IPI_ADDR_RUNLOCK();
2027 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2028 struct sctp_ifa *sctp_ifap;
2029 struct sctp_ifn *sctp_ifnp;
2032 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2034 cnt = SCTP_ADDRESS_LIMIT;
2037 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2038 if ((scope->loopback_scope == 0) &&
2039 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2041 * Skip loopback devices if loopback_scope
2046 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2047 if (sctp_is_address_in_scope(sctp_ifap,
2048 scope->ipv4_addr_legal,
2049 scope->ipv6_addr_legal,
2050 scope->loopback_scope,
2051 scope->ipv4_local_scope,
2053 scope->site_scope, 1) == 0) {
2057 if (cnt > SCTP_ADDRESS_LIMIT) {
2061 if (cnt > SCTP_ADDRESS_LIMIT) {
2068 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2070 if ((scope->loopback_scope == 0) &&
2071 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2073 * Skip loopback devices if
2074 * loopback_scope not set
2078 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2079 if (sctp_is_address_in_scope(sctp_ifap,
2080 scope->ipv4_addr_legal,
2081 scope->ipv6_addr_legal,
2082 scope->loopback_scope,
2083 scope->ipv4_local_scope,
2085 scope->site_scope, 0) == 0) {
2088 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap);
2099 if (total_count > SCTP_ADDRESS_LIMIT) {
2100 /* No more addresses */
2108 struct sctp_laddr *laddr;
2111 /* First, how many ? */
2112 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2113 if (laddr->ifa == NULL) {
2116 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2118 * Address being deleted by the system, dont
2122 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2124 * Address being deleted on this ep don't
2129 if (sctp_is_address_in_scope(laddr->ifa,
2130 scope->ipv4_addr_legal,
2131 scope->ipv6_addr_legal,
2132 scope->loopback_scope,
2133 scope->ipv4_local_scope,
2135 scope->site_scope, 1) == 0) {
2140 if (cnt > SCTP_ADDRESS_LIMIT) {
2144 * To get through a NAT we only list addresses if we have
2145 * more than one. That way if you just bind a single address
2146 * we let the source of the init dictate our address.
2149 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2151 if (laddr->ifa == NULL) {
2154 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2157 if (sctp_is_address_in_scope(laddr->ifa,
2158 scope->ipv4_addr_legal,
2159 scope->ipv6_addr_legal,
2160 scope->loopback_scope,
2161 scope->ipv4_local_scope,
2163 scope->site_scope, 0) == 0) {
2166 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa);
2168 if (cnt >= SCTP_ADDRESS_LIMIT) {
2174 SCTP_IPI_ADDR_RUNLOCK();
2178 static struct sctp_ifa *
2179 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2180 uint8_t dest_is_loop,
2181 uint8_t dest_is_priv,
2184 uint8_t dest_is_global = 0;
2186 /* dest_is_priv is true if destination is a private address */
2187 /* dest_is_loop is true if destination is a loopback addresses */
2190 * Here we determine if its a preferred address. A preferred address
2191 * means it is the same scope or higher scope then the destination.
2192 * L = loopback, P = private, G = global
2193 * -----------------------------------------
2194 * src | dest | result
2195 * ----------------------------------------
2197 * -----------------------------------------
2198 * P | L | yes-v4 no-v6
2199 * -----------------------------------------
2200 * G | L | yes-v4 no-v6
2201 * -----------------------------------------
2203 * -----------------------------------------
2205 * -----------------------------------------
2207 * -----------------------------------------
2209 * -----------------------------------------
2211 * -----------------------------------------
2213 * -----------------------------------------
2216 if (ifa->address.sa.sa_family != fam) {
2217 /* forget mis-matched family */
2220 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2223 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2224 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2225 /* Ok the address may be ok */
2226 if (fam == AF_INET6) {
2227 /* ok to use deprecated addresses? no lets not! */
2228 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2229 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2232 if (ifa->src_is_priv && !ifa->src_is_loop) {
2234 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2238 if (ifa->src_is_glob) {
2240 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2246 * Now that we know what is what, implement or table this could in
2247 * theory be done slicker (it used to be), but this is
2248 * straightforward and easier to validate :-)
2250 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2251 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2252 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2253 dest_is_loop, dest_is_priv, dest_is_global);
2255 if ((ifa->src_is_loop) && (dest_is_priv)) {
2256 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2259 if ((ifa->src_is_glob) && (dest_is_priv)) {
2260 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2263 if ((ifa->src_is_loop) && (dest_is_global)) {
2264 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2267 if ((ifa->src_is_priv) && (dest_is_global)) {
2268 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2271 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2272 /* its a preferred address */
2276 static struct sctp_ifa *
2277 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2278 uint8_t dest_is_loop,
2279 uint8_t dest_is_priv,
2282 uint8_t dest_is_global = 0;
2285 * Here we determine if its a acceptable address. A acceptable
2286 * address means it is the same scope or higher scope but we can
2287 * allow for NAT which means its ok to have a global dest and a
2290 * L = loopback, P = private, G = global
2291 * ----------------------------------------- src | dest | result
2292 * ----------------------------------------- L | L | yes
2293 * ----------------------------------------- P | L |
2294 * yes-v4 no-v6 ----------------------------------------- G |
2295 * L | yes ----------------------------------------- L |
2296 * P | no ----------------------------------------- P | P
2297 * | yes ----------------------------------------- G | P
2298 * | yes - May not work -----------------------------------------
2299 * L | G | no ----------------------------------------- P
2300 * | G | yes - May not work
2301 * ----------------------------------------- G | G | yes
2302 * -----------------------------------------
2305 if (ifa->address.sa.sa_family != fam) {
2306 /* forget non matching family */
2309 /* Ok the address may be ok */
2310 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2313 if (fam == AF_INET6) {
2314 /* ok to use deprecated addresses? */
2315 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2318 if (ifa->src_is_priv) {
2319 /* Special case, linklocal to loop */
2325 * Now that we know what is what, implement our table. This could in
2326 * theory be done slicker (it used to be), but this is
2327 * straightforward and easier to validate :-)
2329 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2332 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2335 /* its an acceptable address */
2340 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2342 struct sctp_laddr *laddr;
2345 /* There are no restrictions, no TCB :-) */
2348 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2349 if (laddr->ifa == NULL) {
2350 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2354 if (laddr->ifa == ifa) {
2355 /* Yes it is on the list */
2364 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2366 struct sctp_laddr *laddr;
2370 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2371 if (laddr->ifa == NULL) {
2372 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2376 if ((laddr->ifa == ifa) && laddr->action == 0)
2385 static struct sctp_ifa *
2386 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2389 int non_asoc_addr_ok,
2390 uint8_t dest_is_priv,
2391 uint8_t dest_is_loop,
2394 struct sctp_laddr *laddr, *starting_point;
2397 struct sctp_ifn *sctp_ifn;
2398 struct sctp_ifa *sctp_ifa, *sifa;
2399 struct sctp_vrf *vrf;
2402 vrf = sctp_find_vrf(vrf_id);
2406 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2407 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2408 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2410 * first question, is the ifn we will emit on in our list, if so, we
2411 * want such an address. Note that we first looked for a preferred
2415 /* is a preferred one on the interface we route out? */
2416 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2417 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2418 (non_asoc_addr_ok == 0))
2420 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2425 if (sctp_is_addr_in_ep(inp, sifa)) {
2426 atomic_add_int(&sifa->refcount, 1);
2432 * ok, now we now need to find one on the list of the addresses. We
2433 * can't get one on the emitting interface so let's find first a
2434 * preferred one. If not that an acceptable one otherwise... we
2437 starting_point = inp->next_addr_touse;
2439 if (inp->next_addr_touse == NULL) {
2440 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2443 for (laddr = inp->next_addr_touse; laddr;
2444 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2445 if (laddr->ifa == NULL) {
2446 /* address has been removed */
2449 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2450 /* address is being deleted */
2453 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2457 atomic_add_int(&sifa->refcount, 1);
2460 if (resettotop == 0) {
2461 inp->next_addr_touse = NULL;
2464 inp->next_addr_touse = starting_point;
2467 if (inp->next_addr_touse == NULL) {
2468 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2471 /* ok, what about an acceptable address in the inp */
2472 for (laddr = inp->next_addr_touse; laddr;
2473 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2474 if (laddr->ifa == NULL) {
2475 /* address has been removed */
2478 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2479 /* address is being deleted */
2482 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2486 atomic_add_int(&sifa->refcount, 1);
2489 if (resettotop == 0) {
2490 inp->next_addr_touse = NULL;
2491 goto once_again_too;
2494 * no address bound can be a source for the destination we are in
2502 static struct sctp_ifa *
2503 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2504 struct sctp_tcb *stcb,
2505 struct sctp_nets *net,
2508 uint8_t dest_is_priv,
2509 uint8_t dest_is_loop,
2510 int non_asoc_addr_ok,
2513 struct sctp_laddr *laddr, *starting_point;
2515 struct sctp_ifn *sctp_ifn;
2516 struct sctp_ifa *sctp_ifa, *sifa;
2517 uint8_t start_at_beginning = 0;
2518 struct sctp_vrf *vrf;
2522 * first question, is the ifn we will emit on in our list, if so, we
2525 vrf = sctp_find_vrf(vrf_id);
2529 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2530 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2531 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2534 * first question, is the ifn we will emit on in our list? If so,
2535 * we want that one. First we look for a preferred. Second, we go
2536 * for an acceptable.
2539 /* first try for a preferred address on the ep */
2540 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2541 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2543 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2544 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2547 if (((non_asoc_addr_ok == 0) &&
2548 (sctp_is_addr_restricted(stcb, sifa))) ||
2549 (non_asoc_addr_ok &&
2550 (sctp_is_addr_restricted(stcb, sifa)) &&
2551 (!sctp_is_addr_pending(stcb, sifa)))) {
2552 /* on the no-no list */
2555 atomic_add_int(&sifa->refcount, 1);
2559 /* next try for an acceptable address on the ep */
2560 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2561 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2563 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2564 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2567 if (((non_asoc_addr_ok == 0) &&
2568 (sctp_is_addr_restricted(stcb, sifa))) ||
2569 (non_asoc_addr_ok &&
2570 (sctp_is_addr_restricted(stcb, sifa)) &&
2571 (!sctp_is_addr_pending(stcb, sifa)))) {
2572 /* on the no-no list */
2575 atomic_add_int(&sifa->refcount, 1);
2582 * if we can't find one like that then we must look at all addresses
2583 * bound to pick one at first preferable then secondly acceptable.
2585 starting_point = stcb->asoc.last_used_address;
2587 if (stcb->asoc.last_used_address == NULL) {
2588 start_at_beginning = 1;
2589 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2591 /* search beginning with the last used address */
2592 for (laddr = stcb->asoc.last_used_address; laddr;
2593 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2594 if (laddr->ifa == NULL) {
2595 /* address has been removed */
2598 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2599 /* address is being deleted */
2602 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2605 if (((non_asoc_addr_ok == 0) &&
2606 (sctp_is_addr_restricted(stcb, sifa))) ||
2607 (non_asoc_addr_ok &&
2608 (sctp_is_addr_restricted(stcb, sifa)) &&
2609 (!sctp_is_addr_pending(stcb, sifa)))) {
2610 /* on the no-no list */
2613 stcb->asoc.last_used_address = laddr;
2614 atomic_add_int(&sifa->refcount, 1);
2617 if (start_at_beginning == 0) {
2618 stcb->asoc.last_used_address = NULL;
2619 goto sctp_from_the_top;
2621 /* now try for any higher scope than the destination */
2622 stcb->asoc.last_used_address = starting_point;
2623 start_at_beginning = 0;
2625 if (stcb->asoc.last_used_address == NULL) {
2626 start_at_beginning = 1;
2627 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2629 /* search beginning with the last used address */
2630 for (laddr = stcb->asoc.last_used_address; laddr;
2631 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2632 if (laddr->ifa == NULL) {
2633 /* address has been removed */
2636 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2637 /* address is being deleted */
2640 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2644 if (((non_asoc_addr_ok == 0) &&
2645 (sctp_is_addr_restricted(stcb, sifa))) ||
2646 (non_asoc_addr_ok &&
2647 (sctp_is_addr_restricted(stcb, sifa)) &&
2648 (!sctp_is_addr_pending(stcb, sifa)))) {
2649 /* on the no-no list */
2652 stcb->asoc.last_used_address = laddr;
2653 atomic_add_int(&sifa->refcount, 1);
2656 if (start_at_beginning == 0) {
2657 stcb->asoc.last_used_address = NULL;
2658 goto sctp_from_the_top2;
2663 static struct sctp_ifa *
2664 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2665 struct sctp_tcb *stcb,
2666 int non_asoc_addr_ok,
2667 uint8_t dest_is_loop,
2668 uint8_t dest_is_priv,
2674 struct sctp_ifa *ifa, *sifa;
2675 int num_eligible_addr = 0;
2678 struct sockaddr_in6 sin6, lsa6;
2680 if (fam == AF_INET6) {
2681 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2682 (void)sa6_recoverscope(&sin6);
2685 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2686 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2687 (non_asoc_addr_ok == 0))
2689 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2694 if (fam == AF_INET6 &&
2696 sifa->src_is_loop && sifa->src_is_priv) {
2698 * don't allow fe80::1 to be a src on loop ::1, we
2699 * don't list it to the peer so we will get an
2704 if (fam == AF_INET6 &&
2705 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2706 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2708 * link-local <-> link-local must belong to the same
2711 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2712 (void)sa6_recoverscope(&lsa6);
2713 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2720 * Check if the IPv6 address matches to next-hop. In the
2721 * mobile case, old IPv6 address may be not deleted from the
2722 * interface. Then, the interface has previous and new
2723 * addresses. We should use one corresponding to the
2724 * next-hop. (by micchie)
2727 if (stcb && fam == AF_INET6 &&
2728 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2729 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2735 /* Avoid topologically incorrect IPv4 address */
2736 if (stcb && fam == AF_INET &&
2737 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2738 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2743 if (sctp_is_address_in_scope(ifa,
2744 stcb->asoc.ipv4_addr_legal,
2745 stcb->asoc.ipv6_addr_legal,
2746 stcb->asoc.loopback_scope,
2747 stcb->asoc.ipv4_local_scope,
2748 stcb->asoc.local_scope,
2749 stcb->asoc.site_scope, 0) == 0) {
2752 if (((non_asoc_addr_ok == 0) &&
2753 (sctp_is_addr_restricted(stcb, sifa))) ||
2754 (non_asoc_addr_ok &&
2755 (sctp_is_addr_restricted(stcb, sifa)) &&
2756 (!sctp_is_addr_pending(stcb, sifa)))) {
2758 * It is restricted for some reason..
2759 * probably not yet added.
2764 if (num_eligible_addr >= addr_wanted) {
2767 num_eligible_addr++;
2774 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2775 struct sctp_tcb *stcb,
2776 int non_asoc_addr_ok,
2777 uint8_t dest_is_loop,
2778 uint8_t dest_is_priv,
2781 struct sctp_ifa *ifa, *sifa;
2782 int num_eligible_addr = 0;
2784 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2785 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2786 (non_asoc_addr_ok == 0)) {
2789 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2795 if (sctp_is_address_in_scope(ifa,
2796 stcb->asoc.ipv4_addr_legal,
2797 stcb->asoc.ipv6_addr_legal,
2798 stcb->asoc.loopback_scope,
2799 stcb->asoc.ipv4_local_scope,
2800 stcb->asoc.local_scope,
2801 stcb->asoc.site_scope, 0) == 0) {
2804 if (((non_asoc_addr_ok == 0) &&
2805 (sctp_is_addr_restricted(stcb, sifa))) ||
2806 (non_asoc_addr_ok &&
2807 (sctp_is_addr_restricted(stcb, sifa)) &&
2808 (!sctp_is_addr_pending(stcb, sifa)))) {
2810 * It is restricted for some reason..
2811 * probably not yet added.
2816 num_eligible_addr++;
2818 return (num_eligible_addr);
2821 static struct sctp_ifa *
2822 sctp_choose_boundall(struct sctp_inpcb *inp,
2823 struct sctp_tcb *stcb,
2824 struct sctp_nets *net,
2827 uint8_t dest_is_priv,
2828 uint8_t dest_is_loop,
2829 int non_asoc_addr_ok,
2832 int cur_addr_num = 0, num_preferred = 0;
2834 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2835 struct sctp_ifa *sctp_ifa, *sifa;
2837 struct sctp_vrf *vrf;
2840 * For boundall we can use any address in the association.
2841 * If non_asoc_addr_ok is set we can use any address (at least in
2842 * theory). So we look for preferred addresses first. If we find one,
2843 * we use it. Otherwise we next try to get an address on the
2844 * interface, which we should be able to do (unless non_asoc_addr_ok
2845 * is false and we are routed out that way). In these cases where we
2846 * can't use the address of the interface we go through all the
2847 * ifn's looking for an address we can use and fill that in. Punting
2848 * means we send back address 0, which will probably cause problems
2849 * actually since then IP will fill in the address of the route ifn,
2850 * which means we probably already rejected it.. i.e. here comes an
2853 vrf = sctp_find_vrf(vrf_id);
2857 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2858 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2859 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2860 if (sctp_ifn == NULL) {
2861 /* ?? We don't have this guy ?? */
2862 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
2863 goto bound_all_plan_b;
2865 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
2866 ifn_index, sctp_ifn->ifn_name);
2869 cur_addr_num = net->indx_of_eligible_next_to_use;
2871 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
2876 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
2877 num_preferred, sctp_ifn->ifn_name);
2878 if (num_preferred == 0) {
2880 * no eligible addresses, we must use some other interface
2881 * address if we can find one.
2883 goto bound_all_plan_b;
2886 * Ok we have num_eligible_addr set with how many we can use, this
2887 * may vary from call to call due to addresses being deprecated
2890 if (cur_addr_num >= num_preferred) {
2894 * select the nth address from the list (where cur_addr_num is the
2895 * nth) and 0 is the first one, 1 is the second one etc...
2897 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
2899 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
2900 dest_is_priv, cur_addr_num, fam, ro);
2902 /* if sctp_ifa is NULL something changed??, fall to plan b. */
2904 atomic_add_int(&sctp_ifa->refcount, 1);
2906 /* save off where the next one we will want */
2907 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
2912 * plan_b: Look at all interfaces and find a preferred address. If
2913 * no preferred fall through to plan_c.
2916 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
2917 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2918 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
2919 sctp_ifn->ifn_name);
2920 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2921 /* wrong base scope */
2922 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
2925 if ((sctp_ifn == looked_at) && looked_at) {
2926 /* already looked at this guy */
2927 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
2930 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, stcb, non_asoc_addr_ok,
2931 dest_is_loop, dest_is_priv, fam);
2932 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2933 "Found ifn:%p %d preferred source addresses\n",
2934 ifn, num_preferred);
2935 if (num_preferred == 0) {
2936 /* None on this interface. */
2937 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n");
2940 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2941 "num preferred:%d on interface:%p cur_addr_num:%d\n",
2942 num_preferred, sctp_ifn, cur_addr_num);
2945 * Ok we have num_eligible_addr set with how many we can
2946 * use, this may vary from call to call due to addresses
2947 * being deprecated etc..
2949 if (cur_addr_num >= num_preferred) {
2952 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
2953 dest_is_priv, cur_addr_num, fam, ro);
2957 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
2958 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
2960 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
2961 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
2962 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
2963 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
2965 atomic_add_int(&sifa->refcount, 1);
2970 /* plan_c: do we have an acceptable address on the emit interface */
2971 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
2972 if (emit_ifn == NULL) {
2975 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
2976 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2977 (non_asoc_addr_ok == 0))
2979 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
2984 if (sctp_is_address_in_scope(sifa,
2985 stcb->asoc.ipv4_addr_legal,
2986 stcb->asoc.ipv6_addr_legal,
2987 stcb->asoc.loopback_scope,
2988 stcb->asoc.ipv4_local_scope,
2989 stcb->asoc.local_scope,
2990 stcb->asoc.site_scope, 0) == 0) {
2993 if (((non_asoc_addr_ok == 0) &&
2994 (sctp_is_addr_restricted(stcb, sifa))) ||
2995 (non_asoc_addr_ok &&
2996 (sctp_is_addr_restricted(stcb, sifa)) &&
2997 (!sctp_is_addr_pending(stcb, sifa)))) {
2999 * It is restricted for some reason..
3000 * probably not yet added.
3005 atomic_add_int(&sifa->refcount, 1);
3010 * plan_d: We are in trouble. No preferred address on the emit
3011 * interface. And not even a preferred address on all interfaces. Go
3012 * out and see if we can find an acceptable address somewhere
3013 * amongst all interfaces.
3015 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D\n");
3016 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3017 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3018 /* wrong base scope */
3021 if ((sctp_ifn == looked_at) && looked_at)
3022 /* already looked at this guy */
3025 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3026 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3027 (non_asoc_addr_ok == 0))
3029 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3035 if (sctp_is_address_in_scope(sifa,
3036 stcb->asoc.ipv4_addr_legal,
3037 stcb->asoc.ipv6_addr_legal,
3038 stcb->asoc.loopback_scope,
3039 stcb->asoc.ipv4_local_scope,
3040 stcb->asoc.local_scope,
3041 stcb->asoc.site_scope, 0) == 0) {
3044 if (((non_asoc_addr_ok == 0) &&
3045 (sctp_is_addr_restricted(stcb, sifa))) ||
3046 (non_asoc_addr_ok &&
3047 (sctp_is_addr_restricted(stcb, sifa)) &&
3048 (!sctp_is_addr_pending(stcb, sifa)))) {
3050 * It is restricted for some
3051 * reason.. probably not yet added.
3056 atomic_add_int(&sifa->refcount, 1);
3061 * Ok we can find NO address to source from that is not on our
3062 * restricted list and non_asoc_address is NOT ok, or it is on our
3063 * restricted list. We can't source to it :-(
3070 /* tcb may be NULL */
3072 sctp_source_address_selection(struct sctp_inpcb *inp,
3073 struct sctp_tcb *stcb,
3075 struct sctp_nets *net,
3076 int non_asoc_addr_ok, uint32_t vrf_id)
3078 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3081 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3084 struct sctp_ifa *answer;
3085 uint8_t dest_is_priv, dest_is_loop;
3089 * Rules: - Find the route if needed, cache if I can. - Look at
3090 * interface address in route, Is it in the bound list. If so we
3091 * have the best source. - If not we must rotate amongst the
3096 * Do we need to pay attention to scope. We can have a private address
3097 * or a global address we are sourcing or sending to. So if we draw
3099 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3101 * ------------------------------------------
3102 * source * dest * result
3103 * -----------------------------------------
3104 * <a> Private * Global * NAT
3105 * -----------------------------------------
3106 * <b> Private * Private * No problem
3107 * -----------------------------------------
3108 * <c> Global * Private * Huh, How will this work?
3109 * -----------------------------------------
3110 * <d> Global * Global * No Problem
3111 *------------------------------------------
3112 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3114 *------------------------------------------
3115 * source * dest * result
3116 * -----------------------------------------
3117 * <a> Linklocal * Global *
3118 * -----------------------------------------
3119 * <b> Linklocal * Linklocal * No problem
3120 * -----------------------------------------
3121 * <c> Global * Linklocal * Huh, How will this work?
3122 * -----------------------------------------
3123 * <d> Global * Global * No Problem
3124 *------------------------------------------
3125 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3127 * And then we add to that what happens if there are multiple addresses
3128 * assigned to an interface. Remember the ifa on a ifn is a linked
3129 * list of addresses. So one interface can have more than one IP
3130 * address. What happens if we have both a private and a global
3131 * address? Do we then use context of destination to sort out which
3132 * one is best? And what about NAT's sending P->G may get you a NAT
3133 * translation, or should you select the G thats on the interface in
3138 * - count the number of addresses on the interface.
3139 * - if it is one, no problem except case <c>.
3140 * For <a> we will assume a NAT out there.
3141 * - if there are more than one, then we need to worry about scope P
3142 * or G. We should prefer G -> G and P -> P if possible.
3143 * Then as a secondary fall back to mixed types G->P being a last
3145 * - The above all works for bound all, but bound specific we need to
3146 * use the same concept but instead only consider the bound
3147 * addresses. If the bound set is NOT assigned to the interface then
3148 * we must use rotation amongst the bound addresses..
3150 if (ro->ro_rt == NULL) {
3152 * Need a route to cache.
3154 SCTP_RTALLOC(ro, vrf_id);
3156 if (ro->ro_rt == NULL) {
3159 fam = to->sin_family;
3160 dest_is_priv = dest_is_loop = 0;
3161 /* Setup our scopes for the destination */
3164 /* Scope based on outbound address */
3165 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3168 /* mark it as local */
3169 net->addr_is_local = 1;
3171 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3177 /* Scope based on outbound address */
3178 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3179 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3181 * If the address is a loopback address, which
3182 * consists of "::1" OR "fe80::1%lo0", we are
3183 * loopback scope. But we don't use dest_is_priv
3184 * (link local addresses).
3188 /* mark it as local */
3189 net->addr_is_local = 1;
3191 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3197 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3198 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)to);
3199 SCTP_IPI_ADDR_RLOCK();
3200 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3204 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3205 dest_is_priv, dest_is_loop,
3206 non_asoc_addr_ok, fam);
3207 SCTP_IPI_ADDR_RUNLOCK();
3214 answer = sctp_choose_boundspecific_stcb(inp, stcb, net, ro,
3215 vrf_id, dest_is_priv,
3217 non_asoc_addr_ok, fam);
3219 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3224 SCTP_IPI_ADDR_RUNLOCK();
3229 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, int cpsize)
3234 tlen = SCTP_BUF_LEN(control);
3237 * Independent of how many mbufs, find the c_type inside the control
3238 * structure and copy out the data.
3241 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3242 /* not enough room for one more we are done. */
3245 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3246 if (((int)cmh.cmsg_len + at) > tlen) {
3248 * this is real messed up since there is not enough
3249 * data here to cover the cmsg header. We are done.
3253 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3254 (c_type == cmh.cmsg_type)) {
3255 /* found the one we want, copy it out */
3256 at += CMSG_ALIGN(sizeof(struct cmsghdr));
3257 if ((int)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < cpsize) {
3259 * space of cmsg_len after header not big
3264 m_copydata(control, at, cpsize, data);
3267 at += CMSG_ALIGN(cmh.cmsg_len);
3268 if (cmh.cmsg_len == 0) {
3277 static struct mbuf *
3278 sctp_add_cookie(struct sctp_inpcb *inp, struct mbuf *init, int init_offset,
3279 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3281 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3282 struct sctp_state_cookie *stc;
3283 struct sctp_paramhdr *ph;
3289 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3290 sizeof(struct sctp_paramhdr)), 0,
3291 M_DONTWAIT, 1, MT_DATA);
3295 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_DONTWAIT);
3296 if (copy_init == NULL) {
3300 #ifdef SCTP_MBUF_LOGGING
3301 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3306 if (SCTP_BUF_IS_EXTENDED(mat)) {
3307 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3309 mat = SCTP_BUF_NEXT(mat);
3313 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3315 if (copy_initack == NULL) {
3317 sctp_m_freem(copy_init);
3320 #ifdef SCTP_MBUF_LOGGING
3321 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3326 if (SCTP_BUF_IS_EXTENDED(mat)) {
3327 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3329 mat = SCTP_BUF_NEXT(mat);
3333 /* easy side we just drop it on the end */
3334 ph = mtod(mret, struct sctp_paramhdr *);
3335 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3336 sizeof(struct sctp_paramhdr);
3337 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3338 sizeof(struct sctp_paramhdr));
3339 ph->param_type = htons(SCTP_STATE_COOKIE);
3340 ph->param_length = 0; /* fill in at the end */
3341 /* Fill in the stc cookie data */
3342 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3344 /* tack the INIT and then the INIT-ACK onto the chain */
3347 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3348 cookie_sz += SCTP_BUF_LEN(m_at);
3349 if (SCTP_BUF_NEXT(m_at) == NULL) {
3350 SCTP_BUF_NEXT(m_at) = copy_init;
3355 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3356 cookie_sz += SCTP_BUF_LEN(m_at);
3357 if (SCTP_BUF_NEXT(m_at) == NULL) {
3358 SCTP_BUF_NEXT(m_at) = copy_initack;
3363 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3364 cookie_sz += SCTP_BUF_LEN(m_at);
3365 if (SCTP_BUF_NEXT(m_at) == NULL) {
3369 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_DONTWAIT, 1, MT_DATA);
3371 /* no space, so free the entire chain */
3375 SCTP_BUF_LEN(sig) = 0;
3376 SCTP_BUF_NEXT(m_at) = sig;
3378 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3379 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3381 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3382 cookie_sz += SCTP_SIGNATURE_SIZE;
3383 ph->param_length = htons(cookie_sz);
3389 sctp_get_ect(struct sctp_tcb *stcb,
3390 struct sctp_tmit_chunk *chk)
3392 uint8_t this_random;
3395 if (SCTP_BASE_SYSCTL(sctp_ecn_enable) == 0)
3398 if (SCTP_BASE_SYSCTL(sctp_ecn_nonce) == 0)
3399 /* no nonce, always return ECT0 */
3400 return (SCTP_ECT0_BIT);
3402 if (stcb->asoc.peer_supports_ecn_nonce == 0) {
3403 /* Peer does NOT support it, so we send a ECT0 only */
3404 return (SCTP_ECT0_BIT);
3407 return (SCTP_ECT0_BIT);
3409 if ((stcb->asoc.hb_random_idx > 3) ||
3410 ((stcb->asoc.hb_random_idx == 3) &&
3411 (stcb->asoc.hb_ect_randombit > 7))) {
3415 rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
3416 memcpy(stcb->asoc.hb_random_values, &rndval,
3417 sizeof(stcb->asoc.hb_random_values));
3418 this_random = stcb->asoc.hb_random_values[0];
3419 stcb->asoc.hb_random_idx = 0;
3420 stcb->asoc.hb_ect_randombit = 0;
3422 if (stcb->asoc.hb_ect_randombit > 7) {
3423 stcb->asoc.hb_ect_randombit = 0;
3424 stcb->asoc.hb_random_idx++;
3425 if (stcb->asoc.hb_random_idx > 3) {
3429 this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
3431 if ((this_random >> stcb->asoc.hb_ect_randombit) & 0x01) {
3433 /* ECN Nonce stuff */
3434 chk->rec.data.ect_nonce = SCTP_ECT1_BIT;
3435 stcb->asoc.hb_ect_randombit++;
3436 return (SCTP_ECT1_BIT);
3438 stcb->asoc.hb_ect_randombit++;
3439 return (SCTP_ECT0_BIT);
3444 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3445 struct sctp_tcb *stcb, /* may be NULL */
3446 struct sctp_nets *net,
3447 struct sockaddr *to,
3449 uint32_t auth_offset,
3450 struct sctp_auth_chunk *auth,
3451 uint16_t auth_keyid,
3452 int nofragment_flag,
3454 struct sctp_tmit_chunk *chk,
3461 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3464 union sctp_sockstore *over_addr
3466 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3469 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet
3470 * header WITH an SCTPHDR but no IP header, endpoint inp and sa
3471 * structure: - fill in the HMAC digest of any AUTH chunk in the
3472 * packet. - calculate and fill in the SCTP checksum. - prepend an
3473 * IP address header. - if boundall use INADDR_ANY. - if
3474 * boundspecific do source address selection. - set fragmentation
3475 * option for ipV4. - On return from IP output, check/adjust mtu
3476 * size of output interface and smallest_mtu size as well.
3478 /* Will need ifdefs around this */
3481 struct sctphdr *sctphdr;
3485 sctp_route_t *ro = NULL;
3486 struct udphdr *udp = NULL;
3488 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3489 struct socket *so = NULL;
3493 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
3494 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
3499 vrf_id = stcb->asoc.vrf_id;
3501 vrf_id = inp->def_vrf_id;
3504 /* fill in the HMAC digest for any AUTH chunk in the packet */
3505 if ((auth != NULL) && (stcb != NULL)) {
3506 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
3508 if (to->sa_family == AF_INET) {
3509 struct ip *ip = NULL;
3510 sctp_route_t iproute;
3514 len = sizeof(struct ip) + sizeof(struct sctphdr);
3516 len += sizeof(struct udphdr);
3518 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
3521 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
3524 SCTP_ALIGN_TO_END(newm, len);
3525 SCTP_BUF_LEN(newm) = len;
3526 SCTP_BUF_NEXT(newm) = m;
3528 packet_length = sctp_calculate_len(m);
3529 ip = mtod(m, struct ip *);
3530 ip->ip_v = IPVERSION;
3531 ip->ip_hl = (sizeof(struct ip) >> 2);
3533 tos_value = net->tos_flowlabel & 0x000000ff;
3535 tos_value = inp->ip_inp.inp.inp_ip_tos;
3537 if ((nofragment_flag) && (port == 0)) {
3542 /* FreeBSD has a function for ip_id's */
3543 ip->ip_id = ip_newid();
3545 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
3546 ip->ip_len = packet_length;
3548 if ((stcb->asoc.ecn_allowed) && ecn_ok) {
3550 ip->ip_tos = ((u_char)(tos_value & 0xfc) | sctp_get_ect(stcb, chk));
3553 ip->ip_tos = (u_char)(tos_value & 0xfc);
3556 /* no association at all */
3557 ip->ip_tos = (tos_value & 0xfc);
3560 ip->ip_p = IPPROTO_UDP;
3562 ip->ip_p = IPPROTO_SCTP;
3567 memset(&iproute, 0, sizeof(iproute));
3568 memcpy(&ro->ro_dst, to, to->sa_len);
3570 ro = (sctp_route_t *) & net->ro;
3572 /* Now the address selection part */
3573 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
3575 /* call the routine to select the src address */
3576 if (net && out_of_asoc_ok == 0) {
3577 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
3578 sctp_free_ifa(net->ro._s_addr);
3579 net->ro._s_addr = NULL;
3580 net->src_addr_selected = 0;
3586 if (net->src_addr_selected == 0) {
3587 /* Cache the source address */
3588 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
3591 net->src_addr_selected = 1;
3593 if (net->ro._s_addr == NULL) {
3594 /* No route to host */
3595 net->src_addr_selected = 0;
3598 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
3600 if (over_addr == NULL) {
3601 struct sctp_ifa *_lsrc;
3603 _lsrc = sctp_source_address_selection(inp, stcb, ro,
3607 if (_lsrc == NULL) {
3610 ip->ip_src = _lsrc->address.sin.sin_addr;
3611 sctp_free_ifa(_lsrc);
3613 ip->ip_src = over_addr->sin.sin_addr;
3614 SCTP_RTALLOC(ro, vrf_id);
3618 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
3619 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
3620 udp->uh_dport = port;
3621 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
3622 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
3623 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
3625 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
3628 sctphdr->src_port = src_port;
3629 sctphdr->dest_port = dest_port;
3630 sctphdr->v_tag = v_tag;
3631 sctphdr->checksum = 0;
3634 * If source address selection fails and we find no route
3635 * then the ip_output should fail as well with a
3636 * NO_ROUTE_TO_HOST type error. We probably should catch
3637 * that somewhere and abort the association right away
3638 * (assuming this is an INIT being sent).
3640 if ((ro->ro_rt == NULL)) {
3642 * src addr selection failed to find a route (or
3643 * valid source addr), so we can't get there from
3647 SCTPDBG(SCTP_DEBUG_OUTPUT1,
3648 "%s: dropped packet - no valid source addr\n",
3651 SCTPDBG(SCTP_DEBUG_OUTPUT1,
3652 "Destination was ");
3653 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1,
3654 &net->ro._l_addr.sa);
3655 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3656 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3657 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", net);
3658 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3660 SCTP_FAILED_THRESHOLD,
3663 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3664 net->dest_state |= SCTP_ADDR_NOT_REACHABLE;
3666 * JRS 5/14/07 - If a
3668 * unreachable, the PF bit
3669 * is turned off. This
3670 * allows an unambiguous use
3672 * destinations that are
3673 * reachable but potentially
3675 * destination is set to the
3676 * unreachable state, also
3677 * set the destination to
3681 * Add debug message here if
3682 * destination is not in PF
3686 * Stop any running T3
3689 if ((stcb->asoc.sctp_cmt_on_off == 1) &&
3690 (stcb->asoc.sctp_cmt_pf > 0)) {
3691 net->dest_state &= ~SCTP_ADDR_PF;
3692 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination %p moved from PF to unreachable.\n",
3698 if (net == stcb->asoc.primary_destination) {
3699 /* need a new primary */
3700 struct sctp_nets *alt;
3702 alt = sctp_find_alternate_net(stcb, net, 0);
3704 if (sctp_set_primary_addr(stcb,
3705 (struct sockaddr *)NULL,
3707 net->dest_state |= SCTP_ADDR_WAS_PRIMARY;
3708 if (net->ro._s_addr) {
3709 sctp_free_ifa(net->ro._s_addr);
3710 net->ro._s_addr = NULL;
3712 net->src_addr_selected = 0;
3718 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
3720 return (EHOSTUNREACH);
3722 if (ro != &iproute) {
3723 memcpy(&iproute, ro, sizeof(*ro));
3725 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
3726 (uint32_t) (ntohl(ip->ip_src.s_addr)));
3727 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
3728 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
3729 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
3732 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
3733 /* failed to prepend data, give up */
3734 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
3738 #ifdef SCTP_PACKET_LOGGING
3739 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
3740 sctp_packet_log(m, packet_length);
3742 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
3744 #if defined(SCTP_WITH_NO_CSUM)
3745 SCTP_STAT_INCR(sctps_sendnocrc);
3747 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
3749 (stcb->asoc.loopback_scope))) {
3750 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
3751 SCTP_STAT_INCR(sctps_sendswcrc);
3753 SCTP_STAT_INCR(sctps_sendnocrc);
3756 SCTP_ENABLE_UDP_CSUM(o_pak);
3758 #if defined(SCTP_WITH_NO_CSUM)
3759 SCTP_STAT_INCR(sctps_sendnocrc);
3761 m->m_pkthdr.csum_flags = CSUM_SCTP;
3762 m->m_pkthdr.csum_data = 0;
3763 SCTP_STAT_INCR(sctps_sendhwcrc);
3766 /* send it out. table id is taken from stcb */
3767 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3768 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
3769 so = SCTP_INP_SO(inp);
3770 SCTP_SOCKET_UNLOCK(so, 0);
3773 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
3774 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3775 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
3776 atomic_add_int(&stcb->asoc.refcnt, 1);
3777 SCTP_TCB_UNLOCK(stcb);
3778 SCTP_SOCKET_LOCK(so, 0);
3779 SCTP_TCB_LOCK(stcb);
3780 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3783 SCTP_STAT_INCR(sctps_sendpackets);
3784 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
3786 SCTP_STAT_INCR(sctps_senderrors);
3788 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
3790 /* free tempy routes */
3796 /* PMTU check versus smallest asoc MTU goes here */
3797 if ((ro->ro_rt != NULL) &&
3798 (net->ro._s_addr)) {
3801 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
3803 mtu -= sizeof(struct udphdr);
3805 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
3806 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
3809 } else if (ro->ro_rt == NULL) {
3810 /* route was freed */
3811 if (net->ro._s_addr &&
3812 net->src_addr_selected) {
3813 sctp_free_ifa(net->ro._s_addr);
3814 net->ro._s_addr = NULL;
3816 net->src_addr_selected = 0;
3822 else if (to->sa_family == AF_INET6) {
3824 struct ip6_hdr *ip6h;
3825 struct route_in6 ip6route;
3828 uint16_t flowBottom;
3829 u_char tosBottom, tosTop;
3830 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
3832 struct sockaddr_in6 lsa6_storage;
3834 u_short prev_port = 0;
3838 flowlabel = net->tos_flowlabel;
3840 flowlabel = ((struct in6pcb *)inp)->in6p_flowinfo;
3843 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
3845 len += sizeof(struct udphdr);
3847 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
3850 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
3853 SCTP_ALIGN_TO_END(newm, len);
3854 SCTP_BUF_LEN(newm) = len;
3855 SCTP_BUF_NEXT(newm) = m;
3857 packet_length = sctp_calculate_len(m);
3859 ip6h = mtod(m, struct ip6_hdr *);
3861 * We assume here that inp_flow is in host byte order within
3864 flowBottom = flowlabel & 0x0000ffff;
3865 flowTop = ((flowlabel & 0x000f0000) >> 16);
3866 tosTop = (((flowlabel & 0xf0) >> 4) | IPV6_VERSION);
3867 /* protect *sin6 from overwrite */
3868 sin6 = (struct sockaddr_in6 *)to;
3872 /* KAME hack: embed scopeid */
3873 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
3874 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
3878 memset(&ip6route, 0, sizeof(ip6route));
3879 ro = (sctp_route_t *) & ip6route;
3880 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
3882 ro = (sctp_route_t *) & net->ro;
3885 if ((stcb->asoc.ecn_allowed) && ecn_ok) {
3887 tosBottom = (((((struct in6pcb *)inp)->in6p_flowinfo & 0x0c) | sctp_get_ect(stcb, chk)) << 4);
3890 tosBottom = ((((struct in6pcb *)inp)->in6p_flowinfo & 0x0c) << 4);
3893 /* we could get no asoc if it is a O-O-T-B packet */
3894 tosBottom = ((((struct in6pcb *)inp)->in6p_flowinfo & 0x0c) << 4);
3896 ip6h->ip6_flow = htonl(((tosTop << 24) | ((tosBottom | flowTop) << 16) | flowBottom));
3898 ip6h->ip6_nxt = IPPROTO_UDP;
3900 ip6h->ip6_nxt = IPPROTO_SCTP;
3902 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
3903 ip6h->ip6_dst = sin6->sin6_addr;
3906 * Add SRC address selection here: we can only reuse to a
3907 * limited degree the kame src-addr-sel, since we can try
3908 * their selection but it may not be bound.
3910 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
3911 lsa6_tmp.sin6_family = AF_INET6;
3912 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
3914 if (net && out_of_asoc_ok == 0) {
3915 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
3916 sctp_free_ifa(net->ro._s_addr);
3917 net->ro._s_addr = NULL;
3918 net->src_addr_selected = 0;
3924 if (net->src_addr_selected == 0) {
3925 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3926 /* KAME hack: embed scopeid */
3927 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
3928 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
3931 /* Cache the source address */
3932 net->ro._s_addr = sctp_source_address_selection(inp,
3938 (void)sa6_recoverscope(sin6);
3939 net->src_addr_selected = 1;
3941 if (net->ro._s_addr == NULL) {
3942 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
3943 net->src_addr_selected = 0;
3946 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
3948 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
3949 /* KAME hack: embed scopeid */
3950 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
3951 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
3954 if (over_addr == NULL) {
3955 struct sctp_ifa *_lsrc;
3957 _lsrc = sctp_source_address_selection(inp, stcb, ro,
3961 if (_lsrc == NULL) {
3964 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
3965 sctp_free_ifa(_lsrc);
3967 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
3968 SCTP_RTALLOC(ro, vrf_id);
3970 (void)sa6_recoverscope(sin6);
3972 lsa6->sin6_port = inp->sctp_lport;
3974 if (ro->ro_rt == NULL) {
3976 * src addr selection failed to find a route (or
3977 * valid source addr), so we can't get there from
3983 * XXX: sa6 may not have a valid sin6_scope_id in the
3984 * non-SCOPEDROUTING case.
3986 bzero(&lsa6_storage, sizeof(lsa6_storage));
3987 lsa6_storage.sin6_family = AF_INET6;
3988 lsa6_storage.sin6_len = sizeof(lsa6_storage);
3989 lsa6_storage.sin6_addr = lsa6->sin6_addr;
3990 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
3991 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
3996 lsa6_storage.sin6_addr = lsa6->sin6_addr;
3997 lsa6_storage.sin6_port = inp->sctp_lport;
3998 lsa6 = &lsa6_storage;
3999 ip6h->ip6_src = lsa6->sin6_addr;
4002 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4003 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4004 udp->uh_dport = port;
4005 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4007 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4009 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4012 sctphdr->src_port = src_port;
4013 sctphdr->dest_port = dest_port;
4014 sctphdr->v_tag = v_tag;
4015 sctphdr->checksum = 0;
4018 * We set the hop limit now since there is a good chance
4019 * that our ro pointer is now filled
4021 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4022 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4025 /* Copy to be sure something bad is not happening */
4026 sin6->sin6_addr = ip6h->ip6_dst;
4027 lsa6->sin6_addr = ip6h->ip6_src;
4030 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4031 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4032 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4033 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4034 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4036 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4037 /* preserve the port and scope for link local send */
4038 prev_scope = sin6->sin6_scope_id;
4039 prev_port = sin6->sin6_port;
4041 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4042 /* failed to prepend data, give up */
4044 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4047 #ifdef SCTP_PACKET_LOGGING
4048 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4049 sctp_packet_log(m, packet_length);
4051 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4053 #if defined(SCTP_WITH_NO_CSUM)
4054 SCTP_STAT_INCR(sctps_sendnocrc);
4056 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
4058 (stcb->asoc.loopback_scope))) {
4059 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4060 SCTP_STAT_INCR(sctps_sendswcrc);
4062 SCTP_STAT_INCR(sctps_sendnocrc);
4065 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4066 udp->uh_sum = 0xffff;
4069 #if defined(SCTP_WITH_NO_CSUM)
4070 SCTP_STAT_INCR(sctps_sendnocrc);
4072 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
4074 (stcb->asoc.loopback_scope))) {
4075 m->m_pkthdr.csum_flags = CSUM_SCTP;
4076 m->m_pkthdr.csum_data = 0;
4077 SCTP_STAT_INCR(sctps_sendhwcrc);
4079 SCTP_STAT_INCR(sctps_sendnocrc);
4083 /* send it out. table id is taken from stcb */
4084 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4085 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4086 so = SCTP_INP_SO(inp);
4087 SCTP_SOCKET_UNLOCK(so, 0);
4090 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4091 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4092 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4093 atomic_add_int(&stcb->asoc.refcnt, 1);
4094 SCTP_TCB_UNLOCK(stcb);
4095 SCTP_SOCKET_LOCK(so, 0);
4096 SCTP_TCB_LOCK(stcb);
4097 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4101 /* for link local this must be done */
4102 sin6->sin6_scope_id = prev_scope;
4103 sin6->sin6_port = prev_port;
4105 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4106 SCTP_STAT_INCR(sctps_sendpackets);
4107 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4109 SCTP_STAT_INCR(sctps_senderrors);
4112 /* Now if we had a temp route free it */
4117 /* PMTU check versus smallest asoc MTU goes here */
4118 if (ro->ro_rt == NULL) {
4119 /* Route was freed */
4120 if (net->ro._s_addr &&
4121 net->src_addr_selected) {
4122 sctp_free_ifa(net->ro._s_addr);
4123 net->ro._s_addr = NULL;
4125 net->src_addr_selected = 0;
4127 if ((ro->ro_rt != NULL) &&
4128 (net->ro._s_addr)) {
4131 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4133 (stcb->asoc.smallest_mtu > mtu)) {
4134 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4137 net->mtu -= sizeof(struct udphdr);
4141 if (ND_IFINFO(ifp)->linkmtu &&
4142 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4143 sctp_mtu_size_reset(inp,
4145 ND_IFINFO(ifp)->linkmtu);
4153 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4154 ((struct sockaddr *)to)->sa_family);
4156 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4163 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4164 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4169 struct mbuf *m, *m_at, *mp_last;
4170 struct sctp_nets *net;
4171 struct sctp_init_chunk *init;
4172 struct sctp_supported_addr_param *sup_addr;
4173 struct sctp_adaptation_layer_indication *ali;
4174 struct sctp_ecn_supported_param *ecn;
4175 struct sctp_prsctp_supported_param *prsctp;
4176 struct sctp_ecn_nonce_supported_param *ecn_nonce;
4177 struct sctp_supported_chunk_types_param *pr_supported;
4178 int cnt_inits_to = 0;
4183 /* INIT's always go to the primary (and usually ONLY address) */
4185 net = stcb->asoc.primary_destination;
4187 net = TAILQ_FIRST(&stcb->asoc.nets);
4192 /* we confirm any address we send an INIT to */
4193 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4194 (void)sctp_set_primary_addr(stcb, NULL, net);
4196 /* we confirm any address we send an INIT to */
4197 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4199 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4201 if (((struct sockaddr *)&(net->ro._l_addr))->sa_family == AF_INET6) {
4203 * special hook, if we are sending to link local it will not
4204 * show up in our private address count.
4206 struct sockaddr_in6 *sin6l;
4208 sin6l = &net->ro._l_addr.sin6;
4209 if (IN6_IS_ADDR_LINKLOCAL(&sin6l->sin6_addr))
4213 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4214 /* This case should not happen */
4215 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4218 /* start the INIT timer */
4219 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4221 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA);
4223 /* No memory, INIT timer will re-attempt. */
4224 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4227 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
4229 * assume peer supports asconf in order to be able to queue local
4230 * address changes while an INIT is in flight and before the assoc
4233 stcb->asoc.peer_supports_asconf = 1;
4234 /* Now lets put the SCTP header in place */
4235 init = mtod(m, struct sctp_init_chunk *);
4236 /* now the chunk header */
4237 init->ch.chunk_type = SCTP_INITIATION;
4238 init->ch.chunk_flags = 0;
4239 /* fill in later from mbuf we build */
4240 init->ch.chunk_length = 0;
4241 /* place in my tag */
4242 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4243 /* set up some of the credits. */
4244 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4245 SCTP_MINIMAL_RWND));
4247 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4248 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4249 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4250 /* now the address restriction */
4251 sup_addr = (struct sctp_supported_addr_param *)((caddr_t)init +
4253 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4255 /* we support 2 types: IPv6/IPv4 */
4256 sup_addr->ph.param_length = htons(sizeof(*sup_addr) + sizeof(uint16_t));
4257 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
4258 sup_addr->addr_type[1] = htons(SCTP_IPV6_ADDRESS);
4260 /* we support 1 type: IPv4 */
4261 sup_addr->ph.param_length = htons(sizeof(*sup_addr) + sizeof(uint8_t));
4262 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
4263 sup_addr->addr_type[1] = htons(0); /* this is the padding */
4265 SCTP_BUF_LEN(m) += sizeof(*sup_addr) + sizeof(uint16_t);
4266 /* adaptation layer indication parameter */
4267 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)sup_addr + sizeof(*sup_addr) + sizeof(uint16_t));
4268 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4269 ali->ph.param_length = htons(sizeof(*ali));
4270 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
4271 SCTP_BUF_LEN(m) += sizeof(*ali);
4272 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
4274 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4275 /* Add NAT friendly parameter */
4276 struct sctp_paramhdr *ph;
4278 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4279 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4280 ph->param_length = htons(sizeof(struct sctp_paramhdr));
4281 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
4282 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ph + sizeof(*ph));
4284 /* now any cookie time extensions */
4285 if (stcb->asoc.cookie_preserve_req) {
4286 struct sctp_cookie_perserve_param *cookie_preserve;
4288 cookie_preserve = (struct sctp_cookie_perserve_param *)(ecn);
4289 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4290 cookie_preserve->ph.param_length = htons(
4291 sizeof(*cookie_preserve));
4292 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4293 SCTP_BUF_LEN(m) += sizeof(*cookie_preserve);
4294 ecn = (struct sctp_ecn_supported_param *)(
4295 (caddr_t)cookie_preserve + sizeof(*cookie_preserve));
4296 stcb->asoc.cookie_preserve_req = 0;
4299 if (SCTP_BASE_SYSCTL(sctp_ecn_enable) == 1) {
4300 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
4301 ecn->ph.param_length = htons(sizeof(*ecn));
4302 SCTP_BUF_LEN(m) += sizeof(*ecn);
4303 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
4306 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
4308 /* And now tell the peer we do pr-sctp */
4309 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
4310 prsctp->ph.param_length = htons(sizeof(*prsctp));
4311 SCTP_BUF_LEN(m) += sizeof(*prsctp);
4313 /* And now tell the peer we do all the extensions */
4314 pr_supported = (struct sctp_supported_chunk_types_param *)
4315 ((caddr_t)prsctp + sizeof(*prsctp));
4316 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4318 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4319 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4320 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4321 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4322 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4323 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4324 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4326 if (stcb->asoc.sctp_nr_sack_on_off == 1) {
4327 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4329 p_len = sizeof(*pr_supported) + num_ext;
4330 pr_supported->ph.param_length = htons(p_len);
4331 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
4332 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4335 /* ECN nonce: And now tell the peer we support ECN nonce */
4336 if (SCTP_BASE_SYSCTL(sctp_ecn_nonce)) {
4337 ecn_nonce = (struct sctp_ecn_nonce_supported_param *)
4338 ((caddr_t)pr_supported + SCTP_SIZE32(p_len));
4339 ecn_nonce->ph.param_type = htons(SCTP_ECN_NONCE_SUPPORTED);
4340 ecn_nonce->ph.param_length = htons(sizeof(*ecn_nonce));
4341 SCTP_BUF_LEN(m) += sizeof(*ecn_nonce);
4343 /* add authentication parameters */
4344 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4345 struct sctp_auth_random *randp;
4346 struct sctp_auth_hmac_algo *hmacs;
4347 struct sctp_auth_chunk_list *chunks;
4349 /* attach RANDOM parameter, if available */
4350 if (stcb->asoc.authinfo.random != NULL) {
4351 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4352 p_len = sizeof(*randp) + stcb->asoc.authinfo.random_len;
4353 /* random key already contains the header */
4354 bcopy(stcb->asoc.authinfo.random->key, randp, p_len);
4355 /* zero out any padding required */
4356 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
4357 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4359 /* add HMAC_ALGO parameter */
4360 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4361 p_len = sctp_serialize_hmaclist(stcb->asoc.local_hmacs,
4362 (uint8_t *) hmacs->hmac_ids);
4364 p_len += sizeof(*hmacs);
4365 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4366 hmacs->ph.param_length = htons(p_len);
4367 /* zero out any padding required */
4368 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
4369 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4371 /* add CHUNKS parameter */
4372 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4373 p_len = sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks,
4374 chunks->chunk_types);
4376 p_len += sizeof(*chunks);
4377 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4378 chunks->ph.param_length = htons(p_len);
4379 /* zero out any padding required */
4380 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
4381 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4385 /* now the addresses */
4387 struct sctp_scoping scp;
4390 * To optimize this we could put the scoping stuff into a
4391 * structure and remove the individual uint8's from the
4392 * assoc structure. Then we could just sifa in the address
4393 * within the stcb.. but for now this is a quick hack to get
4394 * the address stuff teased apart.
4396 scp.ipv4_addr_legal = stcb->asoc.ipv4_addr_legal;
4397 scp.ipv6_addr_legal = stcb->asoc.ipv6_addr_legal;
4398 scp.loopback_scope = stcb->asoc.loopback_scope;
4399 scp.ipv4_local_scope = stcb->asoc.ipv4_local_scope;
4400 scp.local_scope = stcb->asoc.local_scope;
4401 scp.site_scope = stcb->asoc.site_scope;
4403 m_at = sctp_add_addresses_to_i_ia(inp, &scp, m_at, cnt_inits_to);
4406 /* calulate the size and update pkt header and chunk header */
4408 for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
4409 if (SCTP_BUF_NEXT(m_at) == NULL)
4411 p_len += SCTP_BUF_LEN(m_at);
4413 init->ch.chunk_length = htons(p_len);
4415 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
4416 * here since the timer will drive a retranmission.
4419 /* I don't expect this to execute but we will be safe here */
4421 if ((padval) && (mp_last)) {
4423 * The compiler worries that mp_last may not be set even
4424 * though I think it is impossible :-> however we add
4425 * mp_last here just in case.
4427 ret = sctp_add_pad_tombuf(mp_last, (4 - padval));
4429 /* Houston we have a problem, no space */
4435 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4436 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4437 (struct sockaddr *)&net->ro._l_addr,
4438 m, 0, NULL, 0, 0, 0, NULL, 0,
4439 inp->sctp_lport, stcb->rport, htonl(0),
4440 net->port, so_locked, NULL);
4441 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4442 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4443 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4447 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4448 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4451 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4452 * being equal to the beginning of the params i.e. (iphlen +
4453 * sizeof(struct sctp_init_msg) parse through the parameters to the
4454 * end of the mbuf verifying that all parameters are known.
4456 * For unknown parameters build and return a mbuf with
4457 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4458 * processing this chunk stop, and set *abort_processing to 1.
4460 * By having param_offset be pre-set to where parameters begin it is
4461 * hoped that this routine may be reused in the future by new
4464 struct sctp_paramhdr *phdr, params;
4466 struct mbuf *mat, *op_err;
4467 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4468 int at, limit, pad_needed;
4469 uint16_t ptype, plen, padded_size;
4472 *abort_processing = 0;
4475 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4478 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4479 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4480 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4481 ptype = ntohs(phdr->param_type);
4482 plen = ntohs(phdr->param_length);
4483 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4484 /* wacked parameter */
4485 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4488 limit -= SCTP_SIZE32(plen);
4490 * All parameters for all chunks that we know/understand are
4491 * listed here. We process them other places and make
4492 * appropriate stop actions per the upper bits. However this
4493 * is the generic routine processor's can call to get back
4494 * an operr.. to either incorporate (init-ack) or send.
4496 padded_size = SCTP_SIZE32(plen);
4498 /* Param's with variable size */
4499 case SCTP_HEARTBEAT_INFO:
4500 case SCTP_STATE_COOKIE:
4501 case SCTP_UNRECOG_PARAM:
4502 case SCTP_ERROR_CAUSE_IND:
4506 /* Param's with variable size within a range */
4507 case SCTP_CHUNK_LIST:
4508 case SCTP_SUPPORTED_CHUNK_EXT:
4509 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
4510 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
4515 case SCTP_SUPPORTED_ADDRTYPE:
4516 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
4517 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
4523 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
4524 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
4529 case SCTP_SET_PRIM_ADDR:
4530 case SCTP_DEL_IP_ADDRESS:
4531 case SCTP_ADD_IP_ADDRESS:
4532 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
4533 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
4534 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
4539 /* Param's with a fixed size */
4540 case SCTP_IPV4_ADDRESS:
4541 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
4542 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
4547 case SCTP_IPV6_ADDRESS:
4548 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
4549 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
4554 case SCTP_COOKIE_PRESERVE:
4555 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
4556 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
4561 case SCTP_HAS_NAT_SUPPORT:
4564 case SCTP_ECN_NONCE_SUPPORTED:
4565 case SCTP_PRSCTP_SUPPORTED:
4567 if (padded_size != sizeof(struct sctp_paramhdr)) {
4568 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecnnonce/prsctp/nat support %d\n", plen);
4573 case SCTP_ECN_CAPABLE:
4574 if (padded_size != sizeof(struct sctp_ecn_supported_param)) {
4575 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
4580 case SCTP_ULP_ADAPTATION:
4581 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
4582 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
4587 case SCTP_SUCCESS_REPORT:
4588 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
4589 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
4594 case SCTP_HOSTNAME_ADDRESS:
4596 /* We can NOT handle HOST NAME addresses!! */
4599 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
4600 *abort_processing = 1;
4601 if (op_err == NULL) {
4602 /* Ok need to try to get a mbuf */
4604 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
4606 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
4609 l_len += sizeof(struct sctp_paramhdr);
4610 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
4612 SCTP_BUF_LEN(op_err) = 0;
4614 * pre-reserve space for ip
4615 * and sctp header and
4619 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
4621 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
4623 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
4624 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
4628 /* If we have space */
4629 struct sctp_paramhdr s;
4632 uint32_t cpthis = 0;
4634 pad_needed = 4 - (err_at % 4);
4635 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
4636 err_at += pad_needed;
4638 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
4639 s.param_length = htons(sizeof(s) + plen);
4640 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
4641 err_at += sizeof(s);
4642 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
4644 sctp_m_freem(op_err);
4646 * we are out of memory but
4647 * we still need to have a
4648 * look at what to do (the
4649 * system is in trouble
4654 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
4662 * we do not recognize the parameter figure out what
4665 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
4666 if ((ptype & 0x4000) == 0x4000) {
4667 /* Report bit is set?? */
4668 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
4669 if (op_err == NULL) {
4672 /* Ok need to try to get an mbuf */
4674 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
4676 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
4679 l_len += sizeof(struct sctp_paramhdr);
4680 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
4682 SCTP_BUF_LEN(op_err) = 0;
4684 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
4686 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
4688 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
4689 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
4693 /* If we have space */
4694 struct sctp_paramhdr s;
4697 uint32_t cpthis = 0;
4699 pad_needed = 4 - (err_at % 4);
4700 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
4701 err_at += pad_needed;
4703 s.param_type = htons(SCTP_UNRECOG_PARAM);
4704 s.param_length = htons(sizeof(s) + plen);
4705 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
4706 err_at += sizeof(s);
4707 if (plen > sizeof(tempbuf)) {
4708 plen = sizeof(tempbuf);
4710 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
4712 sctp_m_freem(op_err);
4714 * we are out of memory but
4715 * we still need to have a
4716 * look at what to do (the
4717 * system is in trouble
4721 goto more_processing;
4723 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
4728 if ((ptype & 0x8000) == 0x0000) {
4729 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
4732 /* skip this chunk and continue processing */
4733 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
4734 at += SCTP_SIZE32(plen);
4739 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4743 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
4744 *abort_processing = 1;
4745 if ((op_err == NULL) && phdr) {
4749 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
4751 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
4753 l_len += (2 * sizeof(struct sctp_paramhdr));
4754 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
4756 SCTP_BUF_LEN(op_err) = 0;
4758 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
4760 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
4762 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
4763 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
4766 if ((op_err) && phdr) {
4767 struct sctp_paramhdr s;
4770 uint32_t cpthis = 0;
4772 pad_needed = 4 - (err_at % 4);
4773 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
4774 err_at += pad_needed;
4776 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
4777 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
4778 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
4779 err_at += sizeof(s);
4780 /* Only copy back the p-hdr that caused the issue */
4781 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
4787 sctp_are_there_new_addresses(struct sctp_association *asoc,
4788 struct mbuf *in_initpkt, int iphlen, int offset)
4791 * Given a INIT packet, look through the packet to verify that there
4792 * are NO new addresses. As we go through the parameters add reports
4793 * of any un-understood parameters that require an error. Also we
4794 * must return (1) to drop the packet if we see a un-understood
4795 * parameter that tells us to drop the chunk.
4797 struct sockaddr_in sin4, *sa4;
4800 struct sockaddr_in6 sin6, *sa6;
4803 struct sockaddr *sa_touse;
4804 struct sockaddr *sa;
4805 struct sctp_paramhdr *phdr, params;
4809 struct ip6_hdr *ip6h;
4813 uint16_t ptype, plen;
4816 struct sctp_nets *net;
4818 memset(&sin4, 0, sizeof(sin4));
4820 memset(&sin6, 0, sizeof(sin6));
4822 sin4.sin_family = AF_INET;
4823 sin4.sin_len = sizeof(sin4);
4825 sin6.sin6_family = AF_INET6;
4826 sin6.sin6_len = sizeof(sin6);
4829 /* First what about the src address of the pkt ? */
4830 iph = mtod(in_initpkt, struct ip *);
4831 switch (iph->ip_v) {
4833 /* source addr is IPv4 */
4834 sin4.sin_addr = iph->ip_src;
4835 sa_touse = (struct sockaddr *)&sin4;
4838 case IPV6_VERSION >> 4:
4839 /* source addr is IPv6 */
4840 ip6h = mtod(in_initpkt, struct ip6_hdr *);
4841 sin6.sin6_addr = ip6h->ip6_src;
4842 sa_touse = (struct sockaddr *)&sin6;
4850 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4851 sa = (struct sockaddr *)&net->ro._l_addr;
4852 if (sa->sa_family == sa_touse->sa_family) {
4853 if (sa->sa_family == AF_INET) {
4854 sa4 = (struct sockaddr_in *)sa;
4855 if (sa4->sin_addr.s_addr ==
4856 sin4.sin_addr.s_addr) {
4862 if (sa->sa_family == AF_INET6) {
4863 sa6 = (struct sockaddr_in6 *)sa;
4864 if (SCTP6_ARE_ADDR_EQUAL(sa6,
4874 /* New address added! no need to look futher. */
4877 /* Ok so far lets munge through the rest of the packet */
4881 offset += sizeof(struct sctp_init_chunk);
4882 phdr = sctp_get_next_param(mat, offset, ¶ms, sizeof(params));
4884 ptype = ntohs(phdr->param_type);
4885 plen = ntohs(phdr->param_length);
4886 if (ptype == SCTP_IPV4_ADDRESS) {
4887 struct sctp_ipv4addr_param *p4, p4_buf;
4889 phdr = sctp_get_next_param(mat, offset,
4890 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4891 if (plen != sizeof(struct sctp_ipv4addr_param) ||
4895 p4 = (struct sctp_ipv4addr_param *)phdr;
4896 sin4.sin_addr.s_addr = p4->addr;
4897 sa_touse = (struct sockaddr *)&sin4;
4898 } else if (ptype == SCTP_IPV6_ADDRESS) {
4899 struct sctp_ipv6addr_param *p6, p6_buf;
4901 phdr = sctp_get_next_param(mat, offset,
4902 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4903 if (plen != sizeof(struct sctp_ipv6addr_param) ||
4907 p6 = (struct sctp_ipv6addr_param *)phdr;
4909 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4912 sa_touse = (struct sockaddr *)&sin4;
4915 /* ok, sa_touse points to one to check */
4917 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4918 sa = (struct sockaddr *)&net->ro._l_addr;
4919 if (sa->sa_family != sa_touse->sa_family) {
4922 if (sa->sa_family == AF_INET) {
4923 sa4 = (struct sockaddr_in *)sa;
4924 if (sa4->sin_addr.s_addr ==
4925 sin4.sin_addr.s_addr) {
4931 if (sa->sa_family == AF_INET6) {
4932 sa6 = (struct sockaddr_in6 *)sa;
4933 if (SCTP6_ARE_ADDR_EQUAL(
4942 /* New addr added! no need to look further */
4946 offset += SCTP_SIZE32(plen);
4947 phdr = sctp_get_next_param(mat, offset, ¶ms, sizeof(params));
4953 * Given a MBUF chain that was sent into us containing an INIT. Build a
4954 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
4955 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
4956 * message (i.e. the struct sctp_init_msg).
4959 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
4960 struct mbuf *init_pkt, int iphlen, int offset, struct sctphdr *sh,
4961 struct sctp_init_chunk *init_chk, uint32_t vrf_id, uint16_t port, int hold_inp_lock)
4963 struct sctp_association *asoc;
4964 struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last;
4965 struct sctp_init_ack_chunk *initack;
4966 struct sctp_adaptation_layer_indication *ali;
4967 struct sctp_ecn_supported_param *ecn;
4968 struct sctp_prsctp_supported_param *prsctp;
4969 struct sctp_ecn_nonce_supported_param *ecn_nonce;
4970 struct sctp_supported_chunk_types_param *pr_supported;
4971 union sctp_sockstore store, store1, *over_addr;
4972 struct sockaddr_in *sin, *to_sin;
4975 struct sockaddr_in6 *sin6, *to_sin6;
4981 struct ip6_hdr *ip6;
4984 struct sockaddr *to;
4985 struct sctp_state_cookie stc;
4986 struct sctp_nets *net = NULL;
4987 uint8_t *signature = NULL;
4988 int cnt_inits_to = 0;
4989 uint16_t his_limit, i_want;
4990 int abort_flag, padval;
4993 int nat_friendly = 0;
5001 if ((asoc != NULL) &&
5002 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5003 (sctp_are_there_new_addresses(asoc, init_pkt, iphlen, offset))) {
5004 /* new addresses, out of here in non-cookie-wait states */
5006 * Send a ABORT, we don't add the new address error clause
5007 * though we even set the T bit and copy in the 0 tag.. this
5008 * looks no different than if no listener was present.
5010 sctp_send_abort(init_pkt, iphlen, sh, 0, NULL, vrf_id, port);
5014 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5015 (offset + sizeof(struct sctp_init_chunk)),
5016 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5019 sctp_send_abort(init_pkt, iphlen, sh,
5020 init_chk->init.initiate_tag, op_err, vrf_id, port);
5023 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
5025 /* No memory, INIT timer will re-attempt. */
5027 sctp_m_freem(op_err);
5030 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
5032 /* the time I built cookie */
5033 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5035 /* populate any tie tags */
5037 /* unlock before tag selections */
5038 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5039 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5040 stc.cookie_life = asoc->cookie_life;
5041 net = asoc->primary_destination;
5043 stc.tie_tag_my_vtag = 0;
5044 stc.tie_tag_peer_vtag = 0;
5045 /* life I will award this cookie */
5046 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5049 /* copy in the ports for later check */
5050 stc.myport = sh->dest_port;
5051 stc.peerport = sh->src_port;
5054 * If we wanted to honor cookie life extentions, we would add to
5055 * stc.cookie_life. For now we should NOT honor any extension
5057 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5058 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5059 struct inpcb *in_inp;
5061 /* Its a V6 socket */
5062 in_inp = (struct inpcb *)inp;
5063 stc.ipv6_addr_legal = 1;
5064 /* Now look at the binding flag to see if V4 will be legal */
5065 if (SCTP_IPV6_V6ONLY(in_inp) == 0) {
5066 stc.ipv4_addr_legal = 1;
5068 /* V4 addresses are NOT legal on the association */
5069 stc.ipv4_addr_legal = 0;
5072 /* Its a V4 socket, no - V6 */
5073 stc.ipv4_addr_legal = 1;
5074 stc.ipv6_addr_legal = 0;
5077 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5082 /* now for scope setup */
5083 memset((caddr_t)&store, 0, sizeof(store));
5084 memset((caddr_t)&store1, 0, sizeof(store1));
5086 to_sin = &store1.sin;
5089 to_sin6 = &store1.sin6;
5091 iph = mtod(init_pkt, struct ip *);
5092 /* establish the to_addr's */
5093 switch (iph->ip_v) {
5095 to_sin->sin_port = sh->dest_port;
5096 to_sin->sin_family = AF_INET;
5097 to_sin->sin_len = sizeof(struct sockaddr_in);
5098 to_sin->sin_addr = iph->ip_dst;
5101 case IPV6_VERSION >> 4:
5102 ip6 = mtod(init_pkt, struct ip6_hdr *);
5103 to_sin6->sin6_addr = ip6->ip6_dst;
5104 to_sin6->sin6_scope_id = 0;
5105 to_sin6->sin6_port = sh->dest_port;
5106 to_sin6->sin6_family = AF_INET6;
5107 to_sin6->sin6_len = sizeof(struct sockaddr_in6);
5116 to = (struct sockaddr *)&store;
5117 switch (iph->ip_v) {
5120 sin->sin_family = AF_INET;
5121 sin->sin_len = sizeof(struct sockaddr_in);
5122 sin->sin_port = sh->src_port;
5123 sin->sin_addr = iph->ip_src;
5124 /* lookup address */
5125 stc.address[0] = sin->sin_addr.s_addr;
5129 stc.addr_type = SCTP_IPV4_ADDRESS;
5130 /* local from address */
5131 stc.laddress[0] = to_sin->sin_addr.s_addr;
5132 stc.laddress[1] = 0;
5133 stc.laddress[2] = 0;
5134 stc.laddress[3] = 0;
5135 stc.laddr_type = SCTP_IPV4_ADDRESS;
5136 /* scope_id is only for v6 */
5138 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5139 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
5144 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5145 /* Must use the address in this case */
5146 if (sctp_is_address_on_local_host((struct sockaddr *)sin, vrf_id)) {
5147 stc.loopback_scope = 1;
5150 stc.local_scope = 0;
5155 case IPV6_VERSION >> 4:
5157 ip6 = mtod(init_pkt, struct ip6_hdr *);
5158 sin6->sin6_family = AF_INET6;
5159 sin6->sin6_len = sizeof(struct sockaddr_in6);
5160 sin6->sin6_port = sh->src_port;
5161 sin6->sin6_addr = ip6->ip6_src;
5162 /* lookup address */
5163 memcpy(&stc.address, &sin6->sin6_addr,
5164 sizeof(struct in6_addr));
5165 sin6->sin6_scope_id = 0;
5166 stc.addr_type = SCTP_IPV6_ADDRESS;
5168 if (sctp_is_address_on_local_host((struct sockaddr *)sin6, vrf_id)) {
5170 * FIX ME: does this have scope from
5173 (void)sa6_recoverscope(sin6);
5174 stc.scope_id = sin6->sin6_scope_id;
5175 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
5176 stc.loopback_scope = 1;
5177 stc.local_scope = 0;
5180 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
5182 * If the new destination is a
5183 * LINK_LOCAL we must have common
5184 * both site and local scope. Don't
5185 * set local scope though since we
5186 * must depend on the source to be
5187 * added implicitly. We cannot
5188 * assure just because we share one
5189 * link that all links are common.
5191 stc.local_scope = 0;
5195 * we start counting for the private
5196 * address stuff at 1. since the
5197 * link local we source from won't
5198 * show up in our scoped count.
5202 * pull out the scope_id from
5206 * FIX ME: does this have scope from
5209 (void)sa6_recoverscope(sin6);
5210 stc.scope_id = sin6->sin6_scope_id;
5211 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
5212 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
5214 * If the new destination is
5215 * SITE_LOCAL then we must have site
5220 memcpy(&stc.laddress, &to_sin6->sin6_addr, sizeof(struct in6_addr));
5221 stc.laddr_type = SCTP_IPV6_ADDRESS;
5231 /* set the scope per the existing tcb */
5234 struct sctp_nets *lnet;
5238 stc.loopback_scope = asoc->loopback_scope;
5239 stc.ipv4_scope = asoc->ipv4_local_scope;
5240 stc.site_scope = asoc->site_scope;
5241 stc.local_scope = asoc->local_scope;
5243 /* Why do we not consider IPv4 LL addresses? */
5244 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5245 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5246 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5248 * if we have a LL address, start
5256 /* use the net pointer */
5257 to = (struct sockaddr *)&net->ro._l_addr;
5258 switch (to->sa_family) {
5260 sin = (struct sockaddr_in *)to;
5261 stc.address[0] = sin->sin_addr.s_addr;
5265 stc.addr_type = SCTP_IPV4_ADDRESS;
5266 if (net->src_addr_selected == 0) {
5268 * strange case here, the INIT should have
5269 * did the selection.
5271 net->ro._s_addr = sctp_source_address_selection(inp,
5272 stcb, (sctp_route_t *) & net->ro,
5274 if (net->ro._s_addr == NULL)
5277 net->src_addr_selected = 1;
5280 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5281 stc.laddress[1] = 0;
5282 stc.laddress[2] = 0;
5283 stc.laddress[3] = 0;
5284 stc.laddr_type = SCTP_IPV4_ADDRESS;
5288 sin6 = (struct sockaddr_in6 *)to;
5289 memcpy(&stc.address, &sin6->sin6_addr,
5290 sizeof(struct in6_addr));
5291 stc.addr_type = SCTP_IPV6_ADDRESS;
5292 if (net->src_addr_selected == 0) {
5294 * strange case here, the INIT should have
5295 * did the selection.
5297 net->ro._s_addr = sctp_source_address_selection(inp,
5298 stcb, (sctp_route_t *) & net->ro,
5300 if (net->ro._s_addr == NULL)
5303 net->src_addr_selected = 1;
5305 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5306 sizeof(struct in6_addr));
5307 stc.laddr_type = SCTP_IPV6_ADDRESS;
5312 /* Now lets put the SCTP header in place */
5313 initack = mtod(m, struct sctp_init_ack_chunk *);
5314 /* Save it off for quick ref */
5315 stc.peers_vtag = init_chk->init.initiate_tag;
5317 memcpy(stc.identification, SCTP_VERSION_STRING,
5318 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5319 /* now the chunk header */
5320 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5321 initack->ch.chunk_flags = 0;
5322 /* fill in later from mbuf we build */
5323 initack->ch.chunk_length = 0;
5324 /* place in my tag */
5325 if ((asoc != NULL) &&
5326 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5327 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5328 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5329 /* re-use the v-tags and init-seq here */
5330 initack->init.initiate_tag = htonl(asoc->my_vtag);
5331 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5333 uint32_t vtag, itsn;
5335 if (hold_inp_lock) {
5336 SCTP_INP_INCR_REF(inp);
5337 SCTP_INP_RUNLOCK(inp);
5340 atomic_add_int(&asoc->refcnt, 1);
5341 SCTP_TCB_UNLOCK(stcb);
5343 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5344 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5346 * Got a duplicate vtag on some guy behind a
5347 * nat make sure we don't use it.
5351 initack->init.initiate_tag = htonl(vtag);
5352 /* get a TSN to use too */
5353 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5354 initack->init.initial_tsn = htonl(itsn);
5355 SCTP_TCB_LOCK(stcb);
5356 atomic_add_int(&asoc->refcnt, -1);
5358 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5359 initack->init.initiate_tag = htonl(vtag);
5360 /* get a TSN to use too */
5361 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5363 if (hold_inp_lock) {
5364 SCTP_INP_RLOCK(inp);
5365 SCTP_INP_DECR_REF(inp);
5368 /* save away my tag to */
5369 stc.my_vtag = initack->init.initiate_tag;
5371 /* set up some of the credits. */
5372 so = inp->sctp_socket;
5374 /* memory problem */
5378 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5380 /* set what I want */
5381 his_limit = ntohs(init_chk->init.num_inbound_streams);
5382 /* choose what I want */
5384 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5385 i_want = asoc->streamoutcnt;
5387 i_want = inp->sctp_ep.pre_open_stream_count;
5390 i_want = inp->sctp_ep.pre_open_stream_count;
5392 if (his_limit < i_want) {
5393 /* I Want more :< */
5394 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5396 /* I can have what I want :> */
5397 initack->init.num_outbound_streams = htons(i_want);
5399 /* tell him his limt. */
5400 initack->init.num_inbound_streams =
5401 htons(inp->sctp_ep.max_open_streams_intome);
5403 /* adaptation layer indication parameter */
5404 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack));
5405 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5406 ali->ph.param_length = htons(sizeof(*ali));
5407 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
5408 SCTP_BUF_LEN(m) += sizeof(*ali);
5409 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
5412 if (SCTP_BASE_SYSCTL(sctp_ecn_enable) == 1) {
5413 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
5414 ecn->ph.param_length = htons(sizeof(*ecn));
5415 SCTP_BUF_LEN(m) += sizeof(*ecn);
5417 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
5420 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
5422 /* And now tell the peer we do pr-sctp */
5423 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
5424 prsctp->ph.param_length = htons(sizeof(*prsctp));
5425 SCTP_BUF_LEN(m) += sizeof(*prsctp);
5427 /* Add NAT friendly parameter */
5428 struct sctp_paramhdr *ph;
5430 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5431 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5432 ph->param_length = htons(sizeof(struct sctp_paramhdr));
5433 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
5435 /* And now tell the peer we do all the extensions */
5436 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5437 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5439 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5440 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5441 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5442 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5443 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5444 if (!SCTP_BASE_SYSCTL(sctp_auth_disable))
5445 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5446 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
5447 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5448 p_len = sizeof(*pr_supported) + num_ext;
5449 pr_supported->ph.param_length = htons(p_len);
5450 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
5451 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5453 /* ECN nonce: And now tell the peer we support ECN nonce */
5454 if (SCTP_BASE_SYSCTL(sctp_ecn_nonce)) {
5455 ecn_nonce = (struct sctp_ecn_nonce_supported_param *)
5456 ((caddr_t)pr_supported + SCTP_SIZE32(p_len));
5457 ecn_nonce->ph.param_type = htons(SCTP_ECN_NONCE_SUPPORTED);
5458 ecn_nonce->ph.param_length = htons(sizeof(*ecn_nonce));
5459 SCTP_BUF_LEN(m) += sizeof(*ecn_nonce);
5461 /* add authentication parameters */
5462 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
5463 struct sctp_auth_random *randp;
5464 struct sctp_auth_hmac_algo *hmacs;
5465 struct sctp_auth_chunk_list *chunks;
5466 uint16_t random_len;
5468 /* generate and add RANDOM parameter */
5469 random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5470 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5471 randp->ph.param_type = htons(SCTP_RANDOM);
5472 p_len = sizeof(*randp) + random_len;
5473 randp->ph.param_length = htons(p_len);
5474 SCTP_READ_RANDOM(randp->random_data, random_len);
5475 /* zero out any padding required */
5476 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
5477 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5479 /* add HMAC_ALGO parameter */
5480 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5481 p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5482 (uint8_t *) hmacs->hmac_ids);
5484 p_len += sizeof(*hmacs);
5485 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5486 hmacs->ph.param_length = htons(p_len);
5487 /* zero out any padding required */
5488 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
5489 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5491 /* add CHUNKS parameter */
5492 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5493 p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5494 chunks->chunk_types);
5496 p_len += sizeof(*chunks);
5497 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5498 chunks->ph.param_length = htons(p_len);
5499 /* zero out any padding required */
5500 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
5501 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5505 /* now the addresses */
5507 struct sctp_scoping scp;
5510 * To optimize this we could put the scoping stuff into a
5511 * structure and remove the individual uint8's from the stc
5512 * structure. Then we could just sifa in the address within
5513 * the stc.. but for now this is a quick hack to get the
5514 * address stuff teased apart.
5516 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5517 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5518 scp.loopback_scope = stc.loopback_scope;
5519 scp.ipv4_local_scope = stc.ipv4_scope;
5520 scp.local_scope = stc.local_scope;
5521 scp.site_scope = stc.site_scope;
5522 m_at = sctp_add_addresses_to_i_ia(inp, &scp, m_at, cnt_inits_to);
5525 /* tack on the operational error if present */
5533 llen += SCTP_BUF_LEN(ol);
5534 ol = SCTP_BUF_NEXT(ol);
5537 /* must add a pad to the param */
5538 uint32_t cpthis = 0;
5541 padlen = 4 - (llen % 4);
5542 m_copyback(op_err, llen, padlen, (caddr_t)&cpthis);
5544 while (SCTP_BUF_NEXT(m_at) != NULL) {
5545 m_at = SCTP_BUF_NEXT(m_at);
5547 SCTP_BUF_NEXT(m_at) = op_err;
5548 while (SCTP_BUF_NEXT(m_at) != NULL) {
5549 m_at = SCTP_BUF_NEXT(m_at);
5552 /* pre-calulate the size and update pkt header and chunk header */
5554 for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5555 p_len += SCTP_BUF_LEN(m_tmp);
5556 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5557 /* m_tmp should now point to last one */
5562 /* Now we must build a cookie */
5563 m_cookie = sctp_add_cookie(inp, init_pkt, offset, m, 0, &stc, &signature);
5564 if (m_cookie == NULL) {
5565 /* memory problem */
5569 /* Now append the cookie to the end and update the space/size */
5570 SCTP_BUF_NEXT(m_tmp) = m_cookie;
5572 for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5573 p_len += SCTP_BUF_LEN(m_tmp);
5574 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5575 /* m_tmp should now point to last one */
5581 * Place in the size, but we don't include the last pad (if any) in
5584 initack->ch.chunk_length = htons(p_len);
5587 * Time to sign the cookie, we don't sign over the cookie signature
5588 * though thus we set trailer.
5590 (void)sctp_hmac_m(SCTP_HMAC,
5591 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
5592 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
5593 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
5595 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
5596 * here since the timer will drive a retranmission.
5599 if ((padval) && (mp_last)) {
5600 /* see my previous comments on mp_last */
5603 ret = sctp_add_pad_tombuf(mp_last, (4 - padval));
5605 /* Houston we have a problem, no space */
5611 if (stc.loopback_scope) {
5612 over_addr = &store1;
5617 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
5619 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
5620 port, SCTP_SO_NOT_LOCKED, over_addr);
5621 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
5626 sctp_insert_on_wheel(struct sctp_tcb *stcb,
5627 struct sctp_association *asoc,
5628 struct sctp_stream_out *strq, int holds_lock)
5630 if (holds_lock == 0) {
5631 SCTP_TCB_SEND_LOCK(stcb);
5633 if ((strq->next_spoke.tqe_next == NULL) &&
5634 (strq->next_spoke.tqe_prev == NULL)) {
5635 TAILQ_INSERT_TAIL(&asoc->out_wheel, strq, next_spoke);
5637 if (holds_lock == 0) {
5638 SCTP_TCB_SEND_UNLOCK(stcb);
5643 sctp_remove_from_wheel(struct sctp_tcb *stcb,
5644 struct sctp_association *asoc,
5645 struct sctp_stream_out *strq,
5648 /* take off and then setup so we know it is not on the wheel */
5649 if (holds_lock == 0) {
5650 SCTP_TCB_SEND_LOCK(stcb);
5652 if (TAILQ_EMPTY(&strq->outqueue)) {
5653 if (asoc->last_out_stream == strq) {
5654 asoc->last_out_stream = TAILQ_PREV(asoc->last_out_stream, sctpwheel_listhead, next_spoke);
5655 if (asoc->last_out_stream == NULL) {
5656 asoc->last_out_stream = TAILQ_LAST(&asoc->out_wheel, sctpwheel_listhead);
5658 if (asoc->last_out_stream == strq) {
5659 asoc->last_out_stream = NULL;
5662 TAILQ_REMOVE(&asoc->out_wheel, strq, next_spoke);
5663 strq->next_spoke.tqe_next = NULL;
5664 strq->next_spoke.tqe_prev = NULL;
5666 if (holds_lock == 0) {
5667 SCTP_TCB_SEND_UNLOCK(stcb);
5672 sctp_prune_prsctp(struct sctp_tcb *stcb,
5673 struct sctp_association *asoc,
5674 struct sctp_sndrcvinfo *srcv,
5678 struct sctp_tmit_chunk *chk, *nchk;
5680 SCTP_TCB_LOCK_ASSERT(stcb);
5681 if ((asoc->peer_supports_prsctp) &&
5682 (asoc->sent_queue_cnt_removeable > 0)) {
5683 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
5685 * Look for chunks marked with the PR_SCTP flag AND
5686 * the buffer space flag. If the one being sent is
5687 * equal or greater priority then purge the old one
5688 * and free some space.
5690 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
5692 * This one is PR-SCTP AND buffer space
5695 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
5697 * Lower numbers equates to higher
5698 * priority so if the one we are
5699 * looking at has a larger or equal
5700 * priority we want to drop the data
5701 * and NOT retransmit it.
5705 * We release the book_size
5706 * if the mbuf is here
5711 if (chk->sent > SCTP_DATAGRAM_UNSENT)
5712 cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT;
5714 cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT;
5715 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
5718 freed_spc += ret_spc;
5719 if (freed_spc >= dataout) {
5722 } /* if chunk was present */
5723 } /* if of sufficent priority */
5724 } /* if chunk has enabled */
5725 } /* tailqforeach */
5727 chk = TAILQ_FIRST(&asoc->send_queue);
5729 nchk = TAILQ_NEXT(chk, sctp_next);
5730 /* Here we must move to the sent queue and mark */
5731 if (PR_SCTP_TTL_ENABLED(chk->flags)) {
5732 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
5735 * We release the book_size
5736 * if the mbuf is here
5740 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
5741 SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT,
5744 freed_spc += ret_spc;
5745 if (freed_spc >= dataout) {
5748 } /* end if chk->data */
5749 } /* end if right class */
5750 } /* end if chk pr-sctp */
5752 } /* end while (chk) */
5753 } /* if enabled in asoc */
5757 sctp_get_frag_point(struct sctp_tcb *stcb,
5758 struct sctp_association *asoc)
5763 * For endpoints that have both v6 and v4 addresses we must reserve
5764 * room for the ipv6 header, for those that are only dealing with V4
5765 * we use a larger frag point.
5767 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5768 ovh = SCTP_MED_OVERHEAD;
5770 ovh = SCTP_MED_V4_OVERHEAD;
5773 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
5774 siz = asoc->smallest_mtu - ovh;
5776 siz = (stcb->asoc.sctp_frag_point - ovh);
5778 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
5780 /* A data chunk MUST fit in a cluster */
5781 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
5784 /* adjust for an AUTH chunk if DATA requires auth */
5785 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
5786 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
5789 /* make it an even word boundary please */
5796 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
5800 * We assume that the user wants PR_SCTP_TTL if the user provides a
5801 * positive lifetime but does not specify any PR_SCTP policy. This
5802 * is a BAD assumption and causes problems at least with the
5803 * U-Vancovers MPI folks. I will change this to be no policy means
5806 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
5807 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
5812 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
5813 case CHUNK_FLAGS_PR_SCTP_BUF:
5815 * Time to live is a priority stored in tv_sec when doing
5816 * the buffer drop thing.
5818 sp->ts.tv_sec = sp->timetolive;
5821 case CHUNK_FLAGS_PR_SCTP_TTL:
5825 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
5826 tv.tv_sec = sp->timetolive / 1000;
5827 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
5829 * TODO sctp_constants.h needs alternative time
5830 * macros when _KERNEL is undefined.
5832 timevaladd(&sp->ts, &tv);
5835 case CHUNK_FLAGS_PR_SCTP_RTX:
5837 * Time to live is a the number or retransmissions stored in
5840 sp->ts.tv_sec = sp->timetolive;
5844 SCTPDBG(SCTP_DEBUG_USRREQ1,
5845 "Unknown PR_SCTP policy %u.\n",
5846 PR_SCTP_POLICY(sp->sinfo_flags));
5852 sctp_msg_append(struct sctp_tcb *stcb,
5853 struct sctp_nets *net,
5855 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
5857 int error = 0, holds_lock;
5859 struct sctp_stream_queue_pending *sp = NULL;
5860 struct sctp_stream_out *strm;
5863 * Given an mbuf chain, put it into the association send queue and
5864 * place it on the wheel
5866 holds_lock = hold_stcb_lock;
5867 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
5868 /* Invalid stream number */
5869 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
5873 if ((stcb->asoc.stream_locked) &&
5874 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
5875 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
5879 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
5880 /* Now can we send this? */
5881 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
5882 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
5883 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
5884 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
5885 /* got data while shutting down */
5886 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
5890 sctp_alloc_a_strmoq(stcb, sp);
5892 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
5896 sp->sinfo_flags = srcv->sinfo_flags;
5897 sp->timetolive = srcv->sinfo_timetolive;
5898 sp->ppid = srcv->sinfo_ppid;
5899 sp->context = srcv->sinfo_context;
5901 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
5903 atomic_add_int(&sp->net->ref_count, 1);
5907 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
5908 sp->stream = srcv->sinfo_stream;
5909 sp->msg_is_complete = 1;
5910 sp->sender_all_done = 1;
5913 sp->tail_mbuf = NULL;
5916 sctp_set_prsctp_policy(sp);
5918 * We could in theory (for sendall) sifa the length in, but we would
5919 * still have to hunt through the chain since we need to setup the
5923 if (SCTP_BUF_NEXT(at) == NULL)
5925 sp->length += SCTP_BUF_LEN(at);
5926 at = SCTP_BUF_NEXT(at);
5928 SCTP_TCB_SEND_LOCK(stcb);
5929 sctp_snd_sb_alloc(stcb, sp->length);
5930 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
5931 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
5932 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
5933 sp->strseq = strm->next_sequence_sent;
5934 strm->next_sequence_sent++;
5936 if ((strm->next_spoke.tqe_next == NULL) &&
5937 (strm->next_spoke.tqe_prev == NULL)) {
5938 /* Not on wheel, insert */
5939 sctp_insert_on_wheel(stcb, &stcb->asoc, strm, 1);
5942 SCTP_TCB_SEND_UNLOCK(stcb);
5951 static struct mbuf *
5952 sctp_copy_mbufchain(struct mbuf *clonechain,
5953 struct mbuf *outchain,
5954 struct mbuf **endofchain,
5957 uint8_t copy_by_ref)
5960 struct mbuf *appendchain;
5964 if (endofchain == NULL) {
5968 sctp_m_freem(outchain);
5971 if (can_take_mbuf) {
5972 appendchain = clonechain;
5975 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
5977 /* Its not in a cluster */
5978 if (*endofchain == NULL) {
5979 /* lets get a mbuf cluster */
5980 if (outchain == NULL) {
5981 /* This is the general case */
5983 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
5984 if (outchain == NULL) {
5987 SCTP_BUF_LEN(outchain) = 0;
5988 *endofchain = outchain;
5989 /* get the prepend space */
5990 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
5993 * We really should not get a NULL
5999 if (SCTP_BUF_NEXT(m) == NULL) {
6003 m = SCTP_BUF_NEXT(m);
6006 if (*endofchain == NULL) {
6008 * huh, TSNH XXX maybe we
6011 sctp_m_freem(outchain);
6015 /* get the new end of length */
6016 len = M_TRAILINGSPACE(*endofchain);
6018 /* how much is left at the end? */
6019 len = M_TRAILINGSPACE(*endofchain);
6021 /* Find the end of the data, for appending */
6022 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6024 /* Now lets copy it out */
6025 if (len >= sizeofcpy) {
6026 /* It all fits, copy it in */
6027 m_copydata(clonechain, 0, sizeofcpy, cp);
6028 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6030 /* fill up the end of the chain */
6032 m_copydata(clonechain, 0, len, cp);
6033 SCTP_BUF_LEN((*endofchain)) += len;
6034 /* now we need another one */
6037 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6042 SCTP_BUF_NEXT((*endofchain)) = m;
6044 cp = mtod((*endofchain), caddr_t);
6045 m_copydata(clonechain, len, sizeofcpy, cp);
6046 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6050 /* copy the old fashion way */
6051 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_DONTWAIT);
6052 #ifdef SCTP_MBUF_LOGGING
6053 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6058 if (SCTP_BUF_IS_EXTENDED(mat)) {
6059 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6061 mat = SCTP_BUF_NEXT(mat);
6067 if (appendchain == NULL) {
6070 sctp_m_freem(outchain);
6074 /* tack on to the end */
6075 if (*endofchain != NULL) {
6076 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6080 if (SCTP_BUF_NEXT(m) == NULL) {
6081 SCTP_BUF_NEXT(m) = appendchain;
6084 m = SCTP_BUF_NEXT(m);
6088 * save off the end and update the end-chain postion
6092 if (SCTP_BUF_NEXT(m) == NULL) {
6096 m = SCTP_BUF_NEXT(m);
6100 /* save off the end and update the end-chain postion */
6103 if (SCTP_BUF_NEXT(m) == NULL) {
6107 m = SCTP_BUF_NEXT(m);
6109 return (appendchain);
6114 sctp_med_chunk_output(struct sctp_inpcb *inp,
6115 struct sctp_tcb *stcb,
6116 struct sctp_association *asoc,
6119 int control_only, int from_where,
6120 struct timeval *now, int *now_filled, int frag_point, int so_locked
6121 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6127 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6130 struct sctp_copy_all *ca;
6133 int added_control = 0;
6134 int un_sent, do_chunk_output = 1;
6135 struct sctp_association *asoc;
6137 ca = (struct sctp_copy_all *)ptr;
6138 if (ca->m == NULL) {
6141 if (ca->inp != inp) {
6145 if ((ca->m) && ca->sndlen) {
6146 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_DONTWAIT);
6148 /* can't copy so we are done */
6152 #ifdef SCTP_MBUF_LOGGING
6153 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6158 if (SCTP_BUF_IS_EXTENDED(mat)) {
6159 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6161 mat = SCTP_BUF_NEXT(mat);
6168 SCTP_TCB_LOCK_ASSERT(stcb);
6169 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6170 /* Abort this assoc with m as the user defined reason */
6172 struct sctp_paramhdr *ph;
6174 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_DONTWAIT);
6176 ph = mtod(m, struct sctp_paramhdr *);
6177 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6178 ph->param_length = htons(ca->sndlen);
6181 * We add one here to keep the assoc from
6182 * dis-appearing on us.
6184 atomic_add_int(&stcb->asoc.refcnt, 1);
6185 sctp_abort_an_association(inp, stcb,
6186 SCTP_RESPONSE_TO_USER_REQ,
6187 m, SCTP_SO_NOT_LOCKED);
6189 * sctp_abort_an_association calls sctp_free_asoc()
6190 * free association will NOT free it since we
6191 * incremented the refcnt .. we do this to prevent
6192 * it being freed and things getting tricky since we
6193 * could end up (from free_asoc) calling inpcb_free
6194 * which would get a recursive lock call to the
6195 * iterator lock.. But as a consequence of that the
6196 * stcb will return to us un-locked.. since
6197 * free_asoc returns with either no TCB or the TCB
6198 * unlocked, we must relock.. to unlock in the
6199 * iterator timer :-0
6201 SCTP_TCB_LOCK(stcb);
6202 atomic_add_int(&stcb->asoc.refcnt, -1);
6203 goto no_chunk_output;
6207 ret = sctp_msg_append(stcb, stcb->asoc.primary_destination, m,
6211 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6212 /* shutdown this assoc */
6215 cnt = sctp_is_there_unsent_data(stcb);
6217 if (TAILQ_EMPTY(&asoc->send_queue) &&
6218 TAILQ_EMPTY(&asoc->sent_queue) &&
6220 if (asoc->locked_on_sending) {
6224 * there is nothing queued to send, so I'm
6227 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6228 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6229 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6231 * only send SHUTDOWN the first time
6234 sctp_send_shutdown(stcb, stcb->asoc.primary_destination);
6235 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6236 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6238 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6239 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6240 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6241 asoc->primary_destination);
6242 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6243 asoc->primary_destination);
6245 do_chunk_output = 0;
6249 * we still got (or just got) data to send,
6250 * so set SHUTDOWN_PENDING
6253 * XXX sockets draft says that SCTP_EOF
6254 * should be sent with no data. currently,
6255 * we will allow user data to be sent first
6256 * and move to SHUTDOWN-PENDING
6258 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6259 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6260 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6261 if (asoc->locked_on_sending) {
6263 * Locked to send out the
6266 struct sctp_stream_queue_pending *sp;
6268 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6270 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6271 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6274 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6275 if (TAILQ_EMPTY(&asoc->send_queue) &&
6276 TAILQ_EMPTY(&asoc->sent_queue) &&
6277 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6279 atomic_add_int(&stcb->asoc.refcnt, 1);
6280 sctp_abort_an_association(stcb->sctp_ep, stcb,
6281 SCTP_RESPONSE_TO_USER_REQ,
6282 NULL, SCTP_SO_NOT_LOCKED);
6283 atomic_add_int(&stcb->asoc.refcnt, -1);
6284 goto no_chunk_output;
6286 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6287 asoc->primary_destination);
6293 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6294 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6296 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6297 (stcb->asoc.total_flight > 0) &&
6298 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))
6300 do_chunk_output = 0;
6302 if (do_chunk_output)
6303 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6304 else if (added_control) {
6305 int num_out = 0, reason = 0, now_filled = 0;
6309 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6310 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6311 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6322 sctp_sendall_completes(void *ptr, uint32_t val)
6324 struct sctp_copy_all *ca;
6326 ca = (struct sctp_copy_all *)ptr;
6328 * Do a notify here? Kacheong suggests that the notify be done at
6329 * the send time.. so you would push up a notification if any send
6330 * failed. Don't know if this is feasable since the only failures we
6331 * have is "memory" related and if you cannot get an mbuf to send
6332 * the data you surely can't get an mbuf to send up to notify the
6333 * user you can't send the data :->
6336 /* now free everything */
6337 sctp_m_freem(ca->m);
6338 SCTP_FREE(ca, SCTP_M_COPYAL);
6342 #define MC_ALIGN(m, len) do { \
6343 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \
6348 static struct mbuf *
6349 sctp_copy_out_all(struct uio *uio, int len)
6351 struct mbuf *ret, *at;
6352 int left, willcpy, cancpy, error;
6354 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAIT, 1, MT_DATA);
6360 SCTP_BUF_LEN(ret) = 0;
6361 /* save space for the data chunk header */
6362 cancpy = M_TRAILINGSPACE(ret);
6363 willcpy = min(cancpy, left);
6366 /* Align data to the end */
6367 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6373 SCTP_BUF_LEN(at) = willcpy;
6374 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6377 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAIT, 1, MT_DATA);
6378 if (SCTP_BUF_NEXT(at) == NULL) {
6381 at = SCTP_BUF_NEXT(at);
6382 SCTP_BUF_LEN(at) = 0;
6383 cancpy = M_TRAILINGSPACE(at);
6384 willcpy = min(cancpy, left);
6391 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6392 struct sctp_sndrcvinfo *srcv)
6395 struct sctp_copy_all *ca;
6397 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6401 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6404 memset(ca, 0, sizeof(struct sctp_copy_all));
6407 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6409 * take off the sendall flag, it would be bad if we failed to do
6412 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6413 /* get length and mbuf chain */
6415 ca->sndlen = uio->uio_resid;
6416 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6417 if (ca->m == NULL) {
6418 SCTP_FREE(ca, SCTP_M_COPYAL);
6419 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6423 /* Gather the length of the send */
6429 ca->sndlen += SCTP_BUF_LEN(m);
6430 m = SCTP_BUF_NEXT(m);
6434 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6435 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6436 SCTP_ASOC_ANY_STATE,
6438 sctp_sendall_completes, inp, 1);
6440 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6441 SCTP_FREE(ca, SCTP_M_COPYAL);
6442 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6450 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6452 struct sctp_tmit_chunk *chk, *nchk;
6454 chk = TAILQ_FIRST(&asoc->control_send_queue);
6456 nchk = TAILQ_NEXT(chk, sctp_next);
6457 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6458 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6460 sctp_m_freem(chk->data);
6463 asoc->ctrl_queue_cnt--;
6464 sctp_free_a_chunk(stcb, chk);
6471 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6473 struct sctp_association *asoc;
6474 struct sctp_tmit_chunk *chk, *chk_tmp;
6475 struct sctp_asconf_chunk *acp;
6478 for (chk = TAILQ_FIRST(&asoc->asconf_send_queue); chk != NULL;
6481 chk_tmp = TAILQ_NEXT(chk, sctp_next);
6482 /* find SCTP_ASCONF chunk in queue */
6483 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6485 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6486 if (compare_with_wrap(ntohl(acp->serial_number), stcb->asoc.asconf_seq_out_acked, MAX_SEQ)) {
6491 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6493 sctp_m_freem(chk->data);
6496 asoc->ctrl_queue_cnt--;
6497 sctp_free_a_chunk(stcb, chk);
6504 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6505 struct sctp_association *asoc,
6506 struct sctp_tmit_chunk **data_list,
6508 struct sctp_nets *net)
6511 struct sctp_tmit_chunk *tp1;
6513 for (i = 0; i < bundle_at; i++) {
6514 /* off of the send queue */
6515 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6516 asoc->send_queue_cnt--;
6519 * Any chunk NOT 0 you zap the time chunk 0 gets
6520 * zapped or set based on if a RTO measurment is
6523 data_list[i]->do_rtt = 0;
6526 data_list[i]->sent_rcv_time = net->last_sent_time;
6527 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6528 if (data_list[i]->whoTo == NULL) {
6529 data_list[i]->whoTo = net;
6530 atomic_add_int(&net->ref_count, 1);
6532 /* on to the sent queue */
6533 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6534 if ((tp1) && (compare_with_wrap(tp1->rec.data.TSN_seq,
6535 data_list[i]->rec.data.TSN_seq, MAX_TSN))) {
6536 struct sctp_tmit_chunk *tpp;
6538 /* need to move back */
6540 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6542 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6546 if (compare_with_wrap(tp1->rec.data.TSN_seq,
6547 data_list[i]->rec.data.TSN_seq, MAX_TSN)) {
6550 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6552 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6557 /* This does not lower until the cum-ack passes it */
6558 asoc->sent_queue_cnt++;
6559 if ((asoc->peers_rwnd <= 0) &&
6560 (asoc->total_flight == 0) &&
6562 /* Mark the chunk as being a window probe */
6563 SCTP_STAT_INCR(sctps_windowprobed);
6565 #ifdef SCTP_AUDITING_ENABLED
6566 sctp_audit_log(0xC2, 3);
6568 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6569 data_list[i]->snd_count = 1;
6570 data_list[i]->rec.data.chunk_was_revoked = 0;
6571 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6572 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6573 data_list[i]->whoTo->flight_size,
6574 data_list[i]->book_size,
6575 (uintptr_t) data_list[i]->whoTo,
6576 data_list[i]->rec.data.TSN_seq);
6578 sctp_flight_size_increase(data_list[i]);
6579 sctp_total_flight_increase(stcb, data_list[i]);
6580 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6581 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6582 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6584 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6585 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6586 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6587 /* SWS sender side engages */
6588 asoc->peers_rwnd = 0;
6594 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc)
6596 struct sctp_tmit_chunk *chk, *nchk;
6598 for (chk = TAILQ_FIRST(&asoc->control_send_queue);
6600 nchk = TAILQ_NEXT(chk, sctp_next);
6601 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
6602 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
6603 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
6604 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
6605 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
6606 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
6607 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
6608 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
6609 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
6610 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
6611 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
6612 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
6613 /* Stray chunks must be cleaned up */
6615 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6617 sctp_m_freem(chk->data);
6620 asoc->ctrl_queue_cnt--;
6621 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
6622 asoc->fwd_tsn_cnt--;
6623 sctp_free_a_chunk(stcb, chk);
6624 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
6625 /* special handling, we must look into the param */
6626 if (chk != asoc->str_reset) {
6627 goto clean_up_anyway;
6635 sctp_can_we_split_this(struct sctp_tcb *stcb,
6637 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
6640 * Make a decision on if I should split a msg into multiple parts.
6641 * This is only asked of incomplete messages.
6645 * If we are doing EEOR we need to always send it if its the
6646 * entire thing, since it might be all the guy is putting in
6649 if (goal_mtu >= length) {
6651 * If we have data outstanding,
6652 * we get another chance when the sack
6653 * arrives to transmit - wait for more data
6655 if (stcb->asoc.total_flight == 0) {
6657 * If nothing is in flight, we zero the
6665 /* You can fill the rest */
6670 * For those strange folk that make the send buffer
6671 * smaller than our fragmentation point, we can't
6672 * get a full msg in so we have to allow splitting.
6674 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
6677 if ((length <= goal_mtu) ||
6678 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
6679 /* Sub-optimial residual don't split in non-eeor mode. */
6683 * If we reach here length is larger than the goal_mtu. Do we wish
6684 * to split it for the sake of packet putting together?
6686 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
6687 /* Its ok to split it */
6688 return (min(goal_mtu, frag_point));
6690 /* Nope, can't split */
6696 sctp_move_to_outqueue(struct sctp_tcb *stcb,
6697 struct sctp_stream_out *strq,
6699 uint32_t frag_point,
6705 /* Move from the stream to the send_queue keeping track of the total */
6706 struct sctp_association *asoc;
6707 struct sctp_stream_queue_pending *sp;
6708 struct sctp_tmit_chunk *chk;
6709 struct sctp_data_chunk *dchkh;
6710 uint32_t to_move, length;
6711 uint8_t rcv_flags = 0;
6713 uint8_t send_lock_up = 0;
6715 SCTP_TCB_LOCK_ASSERT(stcb);
6718 /* sa_ignore FREED_MEMORY */
6719 sp = TAILQ_FIRST(&strq->outqueue);
6722 if (send_lock_up == 0) {
6723 SCTP_TCB_SEND_LOCK(stcb);
6726 sp = TAILQ_FIRST(&strq->outqueue);
6730 if (strq->last_msg_incomplete) {
6731 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
6733 strq->last_msg_incomplete);
6734 strq->last_msg_incomplete = 0;
6738 SCTP_TCB_SEND_UNLOCK(stcb);
6743 if ((sp->msg_is_complete) && (sp->length == 0)) {
6744 if (sp->sender_all_done) {
6746 * We are doing differed cleanup. Last time through
6747 * when we took all the data the sender_all_done was
6750 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
6751 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
6752 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
6753 sp->sender_all_done,
6755 sp->msg_is_complete,
6759 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
6760 SCTP_TCB_SEND_LOCK(stcb);
6763 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
6764 TAILQ_REMOVE(&strq->outqueue, sp, next);
6766 sctp_free_remote_addr(sp->net);
6770 sctp_m_freem(sp->data);
6773 sctp_free_a_strmoq(stcb, sp);
6774 /* we can't be locked to it */
6776 stcb->asoc.locked_on_sending = NULL;
6778 SCTP_TCB_SEND_UNLOCK(stcb);
6781 /* back to get the next msg */
6785 * sender just finished this but still holds a
6794 /* is there some to get */
6795 if (sp->length == 0) {
6801 } else if (sp->discard_rest) {
6802 if (send_lock_up == 0) {
6803 SCTP_TCB_SEND_LOCK(stcb);
6806 /* Whack down the size */
6807 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
6808 if ((stcb->sctp_socket != NULL) && \
6809 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
6810 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
6811 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
6814 sctp_m_freem(sp->data);
6816 sp->tail_mbuf = NULL;
6826 some_taken = sp->some_taken;
6827 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
6828 sp->msg_is_complete = 1;
6831 length = sp->length;
6832 if (sp->msg_is_complete) {
6833 /* The message is complete */
6834 to_move = min(length, frag_point);
6835 if (to_move == length) {
6836 /* All of it fits in the MTU */
6837 if (sp->some_taken) {
6838 rcv_flags |= SCTP_DATA_LAST_FRAG;
6839 sp->put_last_out = 1;
6841 rcv_flags |= SCTP_DATA_NOT_FRAG;
6842 sp->put_last_out = 1;
6845 /* Not all of it fits, we fragment */
6846 if (sp->some_taken == 0) {
6847 rcv_flags |= SCTP_DATA_FIRST_FRAG;
6852 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
6855 * We use a snapshot of length in case it
6856 * is expanding during the compare.
6861 if (to_move >= llen) {
6863 if (send_lock_up == 0) {
6865 * We are taking all of an incomplete msg
6866 * thus we need a send lock.
6868 SCTP_TCB_SEND_LOCK(stcb);
6870 if (sp->msg_is_complete) {
6872 * the sender finished the
6879 if (sp->some_taken == 0) {
6880 rcv_flags |= SCTP_DATA_FIRST_FRAG;
6884 /* Nothing to take. */
6885 if (sp->some_taken) {
6894 /* If we reach here, we can copy out a chunk */
6895 sctp_alloc_a_chunk(stcb, chk);
6897 /* No chunk memory */
6903 * Setup for unordered if needed by looking at the user sent info
6906 if (sp->sinfo_flags & SCTP_UNORDERED) {
6907 rcv_flags |= SCTP_DATA_UNORDERED;
6909 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
6910 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
6911 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
6913 /* clear out the chunk before setting up */
6914 memset(chk, 0, sizeof(*chk));
6915 chk->rec.data.rcv_flags = rcv_flags;
6917 if (to_move >= length) {
6918 /* we think we can steal the whole thing */
6919 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
6920 SCTP_TCB_SEND_LOCK(stcb);
6923 if (to_move < sp->length) {
6924 /* bail, it changed */
6927 chk->data = sp->data;
6928 chk->last_mbuf = sp->tail_mbuf;
6929 /* register the stealing */
6930 sp->data = sp->tail_mbuf = NULL;
6935 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_DONTWAIT);
6936 chk->last_mbuf = NULL;
6937 if (chk->data == NULL) {
6938 sp->some_taken = some_taken;
6939 sctp_free_a_chunk(stcb, chk);
6944 #ifdef SCTP_MBUF_LOGGING
6945 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6950 if (SCTP_BUF_IS_EXTENDED(mat)) {
6951 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6953 mat = SCTP_BUF_NEXT(mat);
6957 /* Pull off the data */
6958 m_adj(sp->data, to_move);
6959 /* Now lets work our way down and compact it */
6961 while (m && (SCTP_BUF_LEN(m) == 0)) {
6962 sp->data = SCTP_BUF_NEXT(m);
6963 SCTP_BUF_NEXT(m) = NULL;
6964 if (sp->tail_mbuf == m) {
6966 * Freeing tail? TSNH since
6967 * we supposedly were taking less
6968 * than the sp->length.
6971 panic("Huh, freing tail? - TSNH");
6973 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
6974 sp->tail_mbuf = sp->data = NULL;
6983 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
6984 chk->copy_by_ref = 1;
6986 chk->copy_by_ref = 0;
6989 * get last_mbuf and counts of mb useage This is ugly but hopefully
6990 * its only one mbuf.
6992 if (chk->last_mbuf == NULL) {
6993 chk->last_mbuf = chk->data;
6994 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
6995 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
6998 if (to_move > length) {
6999 /*- This should not happen either
7000 * since we always lower to_move to the size
7001 * of sp->length if its larger.
7004 panic("Huh, how can to_move be larger?");
7006 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7010 atomic_subtract_int(&sp->length, to_move);
7012 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7013 /* Not enough room for a chunk header, get some */
7016 m = sctp_get_mbuf_for_msg(1, 0, M_DONTWAIT, 0, MT_DATA);
7019 * we're in trouble here. _PREPEND below will free
7020 * all the data if there is no leading space, so we
7021 * must put the data back and restore.
7023 if (send_lock_up == 0) {
7024 SCTP_TCB_SEND_LOCK(stcb);
7027 if (chk->data == NULL) {
7028 /* unsteal the data */
7029 sp->data = chk->data;
7030 sp->tail_mbuf = chk->last_mbuf;
7034 /* reassemble the data */
7036 sp->data = chk->data;
7037 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7039 sp->some_taken = some_taken;
7040 atomic_add_int(&sp->length, to_move);
7043 sctp_free_a_chunk(stcb, chk);
7047 SCTP_BUF_LEN(m) = 0;
7048 SCTP_BUF_NEXT(m) = chk->data;
7050 M_ALIGN(chk->data, 4);
7053 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT);
7054 if (chk->data == NULL) {
7055 /* HELP, TSNH since we assured it would not above? */
7057 panic("prepend failes HELP?");
7059 SCTP_PRINTF("prepend fails HELP?\n");
7060 sctp_free_a_chunk(stcb, chk);
7066 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7067 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7068 chk->book_size_scale = 0;
7069 chk->sent = SCTP_DATAGRAM_UNSENT;
7072 chk->asoc = &stcb->asoc;
7073 chk->pad_inplace = 0;
7074 chk->no_fr_allowed = 0;
7075 chk->rec.data.stream_seq = sp->strseq;
7076 chk->rec.data.stream_number = sp->stream;
7077 chk->rec.data.payloadtype = sp->ppid;
7078 chk->rec.data.context = sp->context;
7079 chk->rec.data.doing_fast_retransmit = 0;
7080 chk->rec.data.ect_nonce = 0; /* ECN Nonce */
7082 chk->rec.data.timetodrop = sp->ts;
7083 chk->flags = sp->act_flags;
7086 chk->whoTo = sp->net;
7087 atomic_add_int(&chk->whoTo->ref_count, 1);
7091 if (sp->holds_key_ref) {
7092 chk->auth_keyid = sp->auth_keyid;
7093 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7094 chk->holds_key_ref = 1;
7096 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7097 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7098 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7099 (uintptr_t) stcb, sp->length,
7100 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7101 chk->rec.data.TSN_seq);
7103 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7105 * Put the rest of the things in place now. Size was done earlier in
7106 * previous loop prior to padding.
7109 #ifdef SCTP_ASOCLOG_OF_TSNS
7110 SCTP_TCB_LOCK_ASSERT(stcb);
7111 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7112 asoc->tsn_out_at = 0;
7113 asoc->tsn_out_wrapped = 1;
7115 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7116 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7117 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7118 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7119 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7120 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7121 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7122 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7126 dchkh->ch.chunk_type = SCTP_DATA;
7127 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7128 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7129 dchkh->dp.stream_id = htons(strq->stream_no);
7130 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7131 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7132 dchkh->ch.chunk_length = htons(chk->send_size);
7133 /* Now advance the chk->send_size by the actual pad needed. */
7134 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7139 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7140 if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) {
7141 chk->pad_inplace = 1;
7143 if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) {
7144 /* pad added an mbuf */
7145 chk->last_mbuf = lm;
7147 chk->send_size += pads;
7149 /* We only re-set the policy if it is on */
7150 if (sp->pr_sctp_on) {
7151 sctp_set_prsctp_policy(sp);
7152 asoc->pr_sctp_cnt++;
7153 chk->pr_sctp_on = 1;
7155 chk->pr_sctp_on = 0;
7157 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7158 /* All done pull and kill the message */
7159 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7160 if (sp->put_last_out == 0) {
7161 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7162 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7163 sp->sender_all_done,
7165 sp->msg_is_complete,
7169 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7170 SCTP_TCB_SEND_LOCK(stcb);
7173 TAILQ_REMOVE(&strq->outqueue, sp, next);
7175 sctp_free_remote_addr(sp->net);
7179 sctp_m_freem(sp->data);
7182 sctp_free_a_strmoq(stcb, sp);
7184 /* we can't be locked to it */
7186 stcb->asoc.locked_on_sending = NULL;
7188 /* more to go, we are locked */
7191 asoc->chunks_on_out_queue++;
7192 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7193 asoc->send_queue_cnt++;
7196 SCTP_TCB_SEND_UNLOCK(stcb);
7203 static struct sctp_stream_out *
7204 sctp_select_a_stream(struct sctp_tcb *stcb, struct sctp_association *asoc)
7206 struct sctp_stream_out *strq;
7208 /* Find the next stream to use */
7209 if (asoc->last_out_stream == NULL) {
7210 strq = TAILQ_FIRST(&asoc->out_wheel);
7212 strq = TAILQ_NEXT(asoc->last_out_stream, next_spoke);
7214 strq = TAILQ_FIRST(&asoc->out_wheel);
7222 sctp_fill_outqueue(struct sctp_tcb *stcb,
7223 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now)
7225 struct sctp_association *asoc;
7226 struct sctp_stream_out *strq, *strqn;
7227 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7229 struct sctp_stream_queue_pending *sp;
7231 SCTP_TCB_LOCK_ASSERT(stcb);
7234 if (net->ro._l_addr.sin6.sin6_family == AF_INET6) {
7235 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7237 /* ?? not sure what else to do */
7238 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7241 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7243 /* Need an allowance for the data chunk header too */
7244 goal_mtu -= sizeof(struct sctp_data_chunk);
7246 /* must make even word boundary */
7247 goal_mtu &= 0xfffffffc;
7248 if (asoc->locked_on_sending) {
7249 /* We are stuck on one stream until the message completes. */
7250 strq = asoc->locked_on_sending;
7253 strq = sctp_select_a_stream(stcb, asoc);
7257 while ((goal_mtu > 0) && strq) {
7258 sp = TAILQ_FIRST(&strq->outqueue);
7263 * Honor the users' choice if given. If not given,
7264 * pull it only to the primary path in case of not using
7267 if (((sp->net != NULL) &&
7268 (sp->net != net)) ||
7269 ((sp->net == NULL) &&
7270 (asoc->sctp_cmt_on_off == 0) &&
7271 (asoc->primary_destination != net))) {
7272 /* Do not pull to this network */
7276 strq = sctp_select_a_stream(stcb, asoc);
7280 if (strqn == strq) {
7281 /* I have circled */
7289 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7290 &giveup, eeor_mode, &bail);
7292 asoc->last_out_stream = strq;
7295 asoc->locked_on_sending = strq;
7296 if ((moved_how_much == 0) || (giveup) || bail)
7297 /* no more to move for now */
7300 asoc->locked_on_sending = NULL;
7301 if (TAILQ_EMPTY(&strq->outqueue)) {
7302 if (strq == strqn) {
7303 /* Must move start to next one */
7304 strqn = TAILQ_NEXT(strq, next_spoke);
7305 if (strqn == NULL) {
7306 strqn = TAILQ_FIRST(&asoc->out_wheel);
7307 if (strqn == NULL) {
7312 sctp_remove_from_wheel(stcb, asoc, strq, 0);
7314 if ((giveup) || bail) {
7317 strq = sctp_select_a_stream(stcb, asoc);
7322 total_moved += moved_how_much;
7323 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7324 goal_mtu &= 0xfffffffc;
7329 if (total_moved == 0) {
7330 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7331 (net == stcb->asoc.primary_destination)) {
7332 /* ran dry for primary network net */
7333 SCTP_STAT_INCR(sctps_primary_randry);
7334 } else if (stcb->asoc.sctp_cmt_on_off == 1) {
7335 /* ran dry with CMT on */
7336 SCTP_STAT_INCR(sctps_cmt_randry);
7342 sctp_fix_ecn_echo(struct sctp_association *asoc)
7344 struct sctp_tmit_chunk *chk;
7346 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7347 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7348 chk->sent = SCTP_DATAGRAM_UNSENT;
7354 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7356 struct sctp_association *asoc;
7357 struct sctp_stream_out *outs;
7358 struct sctp_tmit_chunk *chk;
7359 struct sctp_stream_queue_pending *sp;
7365 TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) {
7366 TAILQ_FOREACH(sp, &outs->outqueue, next) {
7367 if (sp->net == net) {
7368 sctp_free_remote_addr(sp->net);
7373 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7374 if (chk->whoTo == net) {
7375 sctp_free_remote_addr(chk->whoTo);
7382 sctp_med_chunk_output(struct sctp_inpcb *inp,
7383 struct sctp_tcb *stcb,
7384 struct sctp_association *asoc,
7387 int control_only, int from_where,
7388 struct timeval *now, int *now_filled, int frag_point, int so_locked
7389 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7395 * Ok this is the generic chunk service queue. we must do the
7396 * following: - Service the stream queue that is next, moving any
7397 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7398 * LAST to the out queue in one pass) and assigning TSN's - Check to
7399 * see if the cwnd/rwnd allows any output, if so we go ahead and
7400 * fomulate and send the low level chunks. Making sure to combine
7401 * any control in the control chunk queue also.
7403 struct sctp_nets *net, *start_at, *old_start_at = NULL;
7404 struct mbuf *outchain, *endoutchain;
7405 struct sctp_tmit_chunk *chk, *nchk;
7407 /* temp arrays for unlinking */
7408 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7409 int no_fragmentflg, error;
7410 unsigned int max_rwnd_per_dest;
7411 int one_chunk, hbflag, skip_data_for_this_net;
7412 int asconf, cookie, no_out_cnt;
7413 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7414 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7416 uint32_t auth_offset = 0;
7417 struct sctp_auth_chunk *auth = NULL;
7418 uint16_t auth_keyid;
7419 int override_ok = 1;
7420 int data_auth_reqd = 0;
7423 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7430 auth_keyid = stcb->asoc.authinfo.active_keyid;
7432 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7433 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7434 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7439 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7441 * First lets prime the pump. For each destination, if there is room
7442 * in the flight size, attempt to pull an MTU's worth out of the
7443 * stream queues into the general send_queue
7445 #ifdef SCTP_AUDITING_ENABLED
7446 sctp_audit_log(0xC2, 2);
7448 SCTP_TCB_LOCK_ASSERT(stcb);
7450 if ((control_only) || (asoc->stream_reset_outstanding))
7455 /* Nothing to possible to send? */
7456 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7457 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7458 TAILQ_EMPTY(&asoc->send_queue) &&
7459 TAILQ_EMPTY(&asoc->out_wheel)) {
7463 if (asoc->peers_rwnd == 0) {
7464 /* No room in peers rwnd */
7466 if (asoc->total_flight > 0) {
7467 /* we are allowed one chunk in flight */
7471 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7472 if ((no_data_chunks == 0) && (!TAILQ_EMPTY(&asoc->out_wheel))) {
7473 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7475 * This for loop we are in takes in each net, if
7476 * its's got space in cwnd and has data sent to it
7477 * (when CMT is off) then it calls
7478 * sctp_fill_outqueue for the net. This gets data on
7479 * the send queue for that network.
7481 * In sctp_fill_outqueue TSN's are assigned and data is
7482 * copied out of the stream buffers. Note mostly
7483 * copy by reference (we hope).
7485 net->window_probe = 0;
7486 if ((net->dest_state & SCTP_ADDR_NOT_REACHABLE) ||
7487 (net->dest_state & SCTP_ADDR_UNCONFIRMED)) {
7488 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7489 sctp_log_cwnd(stcb, net, 1,
7490 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7494 if ((asoc->sctp_cmt_on_off == 0) &&
7495 (asoc->primary_destination != net) &&
7496 (net->ref_count < 2)) {
7497 /* nothing can be in queue for this guy */
7498 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7499 sctp_log_cwnd(stcb, net, 2,
7500 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7504 if (net->flight_size >= net->cwnd) {
7505 /* skip this network, no room - can't fill */
7506 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7507 sctp_log_cwnd(stcb, net, 3,
7508 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7512 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7513 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7515 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now);
7517 /* memory alloc failure */
7523 /* now service each destination and send out what we can for it */
7524 /* Nothing to send? */
7525 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7526 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7527 TAILQ_EMPTY(&asoc->send_queue)) {
7531 if (asoc->sctp_cmt_on_off == 1) {
7532 /* get the last start point */
7533 start_at = asoc->last_net_cmt_send_started;
7534 if (start_at == NULL) {
7535 /* null so to beginning */
7536 start_at = TAILQ_FIRST(&asoc->nets);
7538 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7539 if (start_at == NULL) {
7540 start_at = TAILQ_FIRST(&asoc->nets);
7543 asoc->last_net_cmt_send_started = start_at;
7545 start_at = TAILQ_FIRST(&asoc->nets);
7547 old_start_at = NULL;
7548 again_one_more_time:
7549 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7550 /* how much can we send? */
7551 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7552 if (old_start_at && (old_start_at == net)) {
7553 /* through list ocmpletely. */
7557 if ((asoc->sctp_cmt_on_off == 0) &&
7558 (asoc->primary_destination != net) &&
7559 (net->ref_count < 2)) {
7561 * Ref-count of 1 so we cannot have data or control
7562 * queued to this address. Skip it (non-CMT).
7566 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7567 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7568 (net->flight_size >= net->cwnd)) {
7570 * Nothing on control or asconf and flight is full,
7571 * we can skip even in the CMT case.
7575 ctl_cnt = bundle_at = 0;
7576 endoutchain = outchain = NULL;
7579 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7580 skip_data_for_this_net = 1;
7582 skip_data_for_this_net = 0;
7584 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7586 * if we have a route and an ifp check to see if we
7587 * have room to send to this guy
7591 ifp = net->ro.ro_rt->rt_ifp;
7592 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
7593 SCTP_STAT_INCR(sctps_ifnomemqueued);
7594 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
7595 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
7600 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7602 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
7606 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
7616 if (mtu > asoc->peers_rwnd) {
7617 if (asoc->total_flight > 0) {
7618 /* We have a packet in flight somewhere */
7619 r_mtu = asoc->peers_rwnd;
7621 /* We are always allowed to send one MTU out */
7628 /************************/
7629 /* ASCONF transmission */
7630 /************************/
7631 /* Now first lets go through the asconf queue */
7632 for (chk = TAILQ_FIRST(&asoc->asconf_send_queue);
7634 nchk = TAILQ_NEXT(chk, sctp_next);
7635 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
7638 if (chk->whoTo != net) {
7640 * No, not sent to the network we are
7645 if (chk->data == NULL) {
7648 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
7649 chk->sent != SCTP_DATAGRAM_RESEND) {
7653 * if no AUTH is yet included and this chunk
7654 * requires it, make sure to account for it. We
7655 * don't apply the size until the AUTH chunk is
7656 * actually added below in case there is no room for
7657 * this chunk. NOTE: we overload the use of "omtu"
7660 if ((auth == NULL) &&
7661 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
7662 stcb->asoc.peer_auth_chunks)) {
7663 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
7666 /* Here we do NOT factor the r_mtu */
7667 if ((chk->send_size < (int)(mtu - omtu)) ||
7668 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
7670 * We probably should glom the mbuf chain
7671 * from the chk->data for control but the
7672 * problem is it becomes yet one more level
7673 * of tracking to do if for some reason
7674 * output fails. Then I have got to
7675 * reconstruct the merged control chain.. el
7676 * yucko.. for now we take the easy way and
7680 * Add an AUTH chunk, if chunk requires it
7681 * save the offset into the chain for AUTH
7683 if ((auth == NULL) &&
7684 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
7685 stcb->asoc.peer_auth_chunks))) {
7686 outchain = sctp_add_auth_chunk(outchain,
7691 chk->rec.chunk_id.id);
7692 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
7694 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
7695 (int)chk->rec.chunk_id.can_take_data,
7696 chk->send_size, chk->copy_by_ref);
7697 if (outchain == NULL) {
7699 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
7702 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
7703 /* update our MTU size */
7704 if (mtu > (chk->send_size + omtu))
7705 mtu -= (chk->send_size + omtu);
7708 to_out += (chk->send_size + omtu);
7709 /* Do clear IP_DF ? */
7710 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
7713 if (chk->rec.chunk_id.can_take_data)
7716 * set hb flag since we can use these for
7722 * should sysctl this: don't bundle data
7723 * with ASCONF since it requires AUTH
7726 chk->sent = SCTP_DATAGRAM_SENT;
7730 * Ok we are out of room but we can
7731 * output without effecting the
7732 * flight size since this little guy
7733 * is a control only packet.
7735 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
7737 * do NOT clear the asconf flag as
7738 * it is used to do appropriate
7739 * source address selection.
7741 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
7742 (struct sockaddr *)&net->ro._l_addr,
7743 outchain, auth_offset, auth,
7744 stcb->asoc.authinfo.active_keyid,
7745 no_fragmentflg, 0, NULL, asconf,
7746 inp->sctp_lport, stcb->rport,
7747 htonl(stcb->asoc.peer_vtag),
7748 net->port, so_locked, NULL))) {
7749 if (error == ENOBUFS) {
7750 asoc->ifp_had_enobuf = 1;
7751 SCTP_STAT_INCR(sctps_lowlevelerr);
7753 if (from_where == 0) {
7754 SCTP_STAT_INCR(sctps_lowlevelerrusr);
7756 if (*now_filled == 0) {
7757 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
7759 *now = net->last_sent_time;
7761 net->last_sent_time = *now;
7764 /* error, could not output */
7765 if (error == EHOSTUNREACH) {
7771 sctp_move_chunks_from_net(stcb, net);
7776 asoc->ifp_had_enobuf = 0;
7777 if (*now_filled == 0) {
7778 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
7780 *now = net->last_sent_time;
7782 net->last_sent_time = *now;
7786 * increase the number we sent, if a
7787 * cookie is sent we don't tell them
7790 outchain = endoutchain = NULL;
7794 *num_out += ctl_cnt;
7795 /* recalc a clean slate and setup */
7796 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
7797 mtu = (net->mtu - SCTP_MIN_OVERHEAD);
7799 mtu = (net->mtu - SCTP_MIN_V4_OVERHEAD);
7806 /************************/
7807 /* Control transmission */
7808 /************************/
7809 /* Now first lets go through the control queue */
7810 for (chk = TAILQ_FIRST(&asoc->control_send_queue);
7812 nchk = TAILQ_NEXT(chk, sctp_next);
7813 if (chk->whoTo != net) {
7815 * No, not sent to the network we are
7820 if (chk->data == NULL) {
7823 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
7825 * It must be unsent. Cookies and ASCONF's
7826 * hang around but there timers will force
7827 * when marked for resend.
7832 * if no AUTH is yet included and this chunk
7833 * requires it, make sure to account for it. We
7834 * don't apply the size until the AUTH chunk is
7835 * actually added below in case there is no room for
7836 * this chunk. NOTE: we overload the use of "omtu"
7839 if ((auth == NULL) &&
7840 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
7841 stcb->asoc.peer_auth_chunks)) {
7842 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
7845 /* Here we do NOT factor the r_mtu */
7846 if ((chk->send_size <= (int)(mtu - omtu)) ||
7847 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
7849 * We probably should glom the mbuf chain
7850 * from the chk->data for control but the
7851 * problem is it becomes yet one more level
7852 * of tracking to do if for some reason
7853 * output fails. Then I have got to
7854 * reconstruct the merged control chain.. el
7855 * yucko.. for now we take the easy way and
7859 * Add an AUTH chunk, if chunk requires it
7860 * save the offset into the chain for AUTH
7862 if ((auth == NULL) &&
7863 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
7864 stcb->asoc.peer_auth_chunks))) {
7865 outchain = sctp_add_auth_chunk(outchain,
7870 chk->rec.chunk_id.id);
7871 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
7873 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
7874 (int)chk->rec.chunk_id.can_take_data,
7875 chk->send_size, chk->copy_by_ref);
7876 if (outchain == NULL) {
7878 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
7881 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
7882 /* update our MTU size */
7883 if (mtu > (chk->send_size + omtu))
7884 mtu -= (chk->send_size + omtu);
7887 to_out += (chk->send_size + omtu);
7888 /* Do clear IP_DF ? */
7889 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
7892 if (chk->rec.chunk_id.can_take_data)
7894 /* Mark things to be removed, if needed */
7895 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7896 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7897 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7898 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7899 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7900 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7901 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7902 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7903 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7904 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7905 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7907 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
7910 * JRS 5/14/07 - Set the
7911 * flag to say a heartbeat
7916 /* remove these chunks at the end */
7917 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7918 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7919 /* turn off the timer */
7920 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
7921 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
7922 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
7928 * Other chunks, since they have
7929 * timers running (i.e. COOKIE) we
7930 * just "trust" that it gets sent or
7934 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
7938 chk->sent = SCTP_DATAGRAM_SENT;
7943 * Ok we are out of room but we can
7944 * output without effecting the
7945 * flight size since this little guy
7946 * is a control only packet.
7949 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
7951 * do NOT clear the asconf
7952 * flag as it is used to do
7953 * appropriate source
7954 * address selection.
7958 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
7961 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
7962 (struct sockaddr *)&net->ro._l_addr,
7965 stcb->asoc.authinfo.active_keyid,
7966 no_fragmentflg, 0, NULL, asconf,
7967 inp->sctp_lport, stcb->rport,
7968 htonl(stcb->asoc.peer_vtag),
7969 net->port, so_locked, NULL))) {
7970 if (error == ENOBUFS) {
7971 asoc->ifp_had_enobuf = 1;
7972 SCTP_STAT_INCR(sctps_lowlevelerr);
7974 if (from_where == 0) {
7975 SCTP_STAT_INCR(sctps_lowlevelerrusr);
7977 /* error, could not output */
7979 if (*now_filled == 0) {
7980 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
7982 *now = net->last_sent_time;
7984 net->last_sent_time = *now;
7988 if (error == EHOSTUNREACH) {
7994 sctp_move_chunks_from_net(stcb, net);
7999 asoc->ifp_had_enobuf = 0;
8000 /* Only HB or ASCONF advances time */
8002 if (*now_filled == 0) {
8003 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8005 *now = net->last_sent_time;
8007 net->last_sent_time = *now;
8012 * increase the number we sent, if a
8013 * cookie is sent we don't tell them
8016 outchain = endoutchain = NULL;
8020 *num_out += ctl_cnt;
8021 /* recalc a clean slate and setup */
8022 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
8023 mtu = (net->mtu - SCTP_MIN_OVERHEAD);
8025 mtu = (net->mtu - SCTP_MIN_V4_OVERHEAD);
8032 /* JRI: if dest is in PF state, do not send data to it */
8033 if ((asoc->sctp_cmt_on_off == 1) &&
8034 (asoc->sctp_cmt_pf > 0) &&
8035 (net->dest_state & SCTP_ADDR_PF)) {
8038 if (net->flight_size >= net->cwnd) {
8041 if ((asoc->sctp_cmt_on_off == 1) &&
8042 (net->flight_size > max_rwnd_per_dest)) {
8045 /*********************/
8046 /* Data transmission */
8047 /*********************/
8049 * if AUTH for DATA is required and no AUTH has been added
8050 * yet, account for this in the mtu now... if no data can be
8051 * bundled, this adjustment won't matter anyways since the
8052 * packet will be going out...
8054 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8055 stcb->asoc.peer_auth_chunks);
8056 if (data_auth_reqd && (auth == NULL)) {
8057 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8059 /* now lets add any data within the MTU constraints */
8060 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8062 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8063 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8069 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8070 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8080 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8081 (skip_data_for_this_net == 0)) ||
8083 for (chk = TAILQ_FIRST(&asoc->send_queue); chk; chk = nchk) {
8084 if (no_data_chunks) {
8085 /* let only control go out */
8089 if (net->flight_size >= net->cwnd) {
8090 /* skip this net, no room for data */
8094 nchk = TAILQ_NEXT(chk, sctp_next);
8095 if ((chk->whoTo != NULL) &&
8096 (chk->whoTo != net)) {
8097 /* Don't send the chunk on this net */
8100 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8102 * strange, we have a chunk that is
8103 * to big for its destination and
8104 * yet no fragment ok flag.
8105 * Something went wrong when the
8106 * PMTU changed...we did not mark
8107 * this chunk for some reason?? I
8108 * will fix it here by letting IP
8109 * fragment it for now and printing
8110 * a warning. This really should not
8113 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8114 chk->send_size, mtu);
8115 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8117 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8118 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8119 struct sctp_data_chunk *dchkh;
8121 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8122 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8124 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8125 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8126 /* ok we will add this one */
8129 * Add an AUTH chunk, if chunk
8130 * requires it, save the offset into
8131 * the chain for AUTH
8133 if (data_auth_reqd) {
8135 outchain = sctp_add_auth_chunk(outchain,
8141 auth_keyid = chk->auth_keyid;
8143 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8144 } else if (override_ok) {
8149 auth_keyid = chk->auth_keyid;
8151 } else if (auth_keyid != chk->auth_keyid) {
8159 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8160 chk->send_size, chk->copy_by_ref);
8161 if (outchain == NULL) {
8162 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8163 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8164 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8167 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8170 /* upate our MTU size */
8171 /* Do clear IP_DF ? */
8172 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8175 /* unsigned subtraction of mtu */
8176 if (mtu > chk->send_size)
8177 mtu -= chk->send_size;
8180 /* unsigned subtraction of r_mtu */
8181 if (r_mtu > chk->send_size)
8182 r_mtu -= chk->send_size;
8186 to_out += chk->send_size;
8187 if ((to_out > mx_mtu) && no_fragmentflg) {
8189 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8191 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8195 chk->window_probe = 0;
8196 data_list[bundle_at++] = chk;
8197 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8201 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8202 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8203 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8205 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8207 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8208 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8218 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8220 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8221 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8222 data_list[0]->window_probe = 1;
8223 net->window_probe = 1;
8229 * Must be sent in order of the
8230 * TSN's (on a network)
8234 } /* for (chunk gather loop for this net) */
8235 } /* if asoc.state OPEN */
8237 /* Is there something to send for this destination? */
8239 /* We may need to start a control timer or two */
8241 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8244 * do NOT clear the asconf flag as it is
8245 * used to do appropriate source address
8250 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8253 /* must start a send timer if data is being sent */
8254 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8256 * no timer running on this destination
8259 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8260 } else if ((asoc->sctp_cmt_on_off == 1) &&
8261 (asoc->sctp_cmt_pf > 0) &&
8263 ((net->dest_state & SCTP_ADDR_PF) == SCTP_ADDR_PF) &&
8264 (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8266 * JRS 5/14/07 - If a HB has been sent to a
8267 * PF destination and no T3 timer is
8268 * currently running, start the T3 timer to
8269 * track the HBs that were sent.
8271 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8273 /* Now send it, if there is anything to send :> */
8274 if ((error = sctp_lowlevel_chunk_output(inp,
8277 (struct sockaddr *)&net->ro._l_addr,
8286 inp->sctp_lport, stcb->rport,
8287 htonl(stcb->asoc.peer_vtag),
8288 net->port, so_locked, NULL))) {
8289 /* error, we could not output */
8290 if (error == ENOBUFS) {
8291 SCTP_STAT_INCR(sctps_lowlevelerr);
8292 asoc->ifp_had_enobuf = 1;
8294 if (from_where == 0) {
8295 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8297 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8299 if (*now_filled == 0) {
8300 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8302 *now = net->last_sent_time;
8304 net->last_sent_time = *now;
8308 if (error == EHOSTUNREACH) {
8310 * Destination went unreachable
8313 sctp_move_chunks_from_net(stcb, net);
8317 * I add this line to be paranoid. As far as
8318 * I can tell the continue, takes us back to
8319 * the top of the for, but just to make sure
8320 * I will reset these again here.
8322 ctl_cnt = bundle_at = 0;
8323 continue; /* This takes us back to the
8324 * for() for the nets. */
8326 asoc->ifp_had_enobuf = 0;
8328 outchain = endoutchain = NULL;
8331 if (bundle_at || hbflag) {
8332 /* For data/asconf and hb set time */
8333 if (*now_filled == 0) {
8334 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8336 *now = net->last_sent_time;
8338 net->last_sent_time = *now;
8342 *num_out += (ctl_cnt + bundle_at);
8345 /* setup for a RTO measurement */
8346 tsns_sent = data_list[0]->rec.data.TSN_seq;
8347 /* fill time if not already filled */
8348 if (*now_filled == 0) {
8349 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8351 *now = asoc->time_last_sent;
8353 asoc->time_last_sent = *now;
8355 data_list[0]->do_rtt = 1;
8356 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8357 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8358 if (SCTP_BASE_SYSCTL(sctp_early_fr)) {
8359 if (net->flight_size < net->cwnd) {
8360 /* start or restart it */
8361 if (SCTP_OS_TIMER_PENDING(&net->fr_timer.timer)) {
8362 sctp_timer_stop(SCTP_TIMER_TYPE_EARLYFR, inp, stcb, net,
8363 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
8365 SCTP_STAT_INCR(sctps_earlyfrstrout);
8366 sctp_timer_start(SCTP_TIMER_TYPE_EARLYFR, inp, stcb, net);
8368 /* stop it if its running */
8369 if (SCTP_OS_TIMER_PENDING(&net->fr_timer.timer)) {
8370 SCTP_STAT_INCR(sctps_earlyfrstpout);
8371 sctp_timer_stop(SCTP_TIMER_TYPE_EARLYFR, inp, stcb, net,
8372 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
8381 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8382 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8385 if (old_start_at == NULL) {
8386 old_start_at = start_at;
8387 start_at = TAILQ_FIRST(&asoc->nets);
8389 goto again_one_more_time;
8392 * At the end there should be no NON timed chunks hanging on this
8395 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8396 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8398 if ((*num_out == 0) && (*reason_code == 0)) {
8403 sctp_clean_up_ctl(stcb, asoc);
8408 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8411 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8412 * the control chunk queue.
8414 struct sctp_chunkhdr *hdr;
8415 struct sctp_tmit_chunk *chk;
8418 SCTP_TCB_LOCK_ASSERT(stcb);
8419 sctp_alloc_a_chunk(stcb, chk);
8422 sctp_m_freem(op_err);
8425 chk->copy_by_ref = 0;
8426 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT);
8427 if (op_err == NULL) {
8428 sctp_free_a_chunk(stcb, chk);
8433 while (mat != NULL) {
8434 chk->send_size += SCTP_BUF_LEN(mat);
8435 mat = SCTP_BUF_NEXT(mat);
8437 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8438 chk->rec.chunk_id.can_take_data = 1;
8439 chk->sent = SCTP_DATAGRAM_UNSENT;
8442 chk->asoc = &stcb->asoc;
8444 chk->whoTo = chk->asoc->primary_destination;
8445 atomic_add_int(&chk->whoTo->ref_count, 1);
8446 hdr = mtod(op_err, struct sctp_chunkhdr *);
8447 hdr->chunk_type = SCTP_OPERATION_ERROR;
8448 hdr->chunk_flags = 0;
8449 hdr->chunk_length = htons(chk->send_size);
8450 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8453 chk->asoc->ctrl_queue_cnt++;
8457 sctp_send_cookie_echo(struct mbuf *m,
8459 struct sctp_tcb *stcb,
8460 struct sctp_nets *net)
8463 * pull out the cookie and put it at the front of the control chunk
8467 struct mbuf *cookie;
8468 struct sctp_paramhdr parm, *phdr;
8469 struct sctp_chunkhdr *hdr;
8470 struct sctp_tmit_chunk *chk;
8471 uint16_t ptype, plen;
8473 /* First find the cookie in the param area */
8475 at = offset + sizeof(struct sctp_init_chunk);
8477 SCTP_TCB_LOCK_ASSERT(stcb);
8479 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8483 ptype = ntohs(phdr->param_type);
8484 plen = ntohs(phdr->param_length);
8485 if (ptype == SCTP_STATE_COOKIE) {
8488 /* found the cookie */
8489 if ((pad = (plen % 4))) {
8492 cookie = SCTP_M_COPYM(m, at, plen, M_DONTWAIT);
8493 if (cookie == NULL) {
8497 #ifdef SCTP_MBUF_LOGGING
8498 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8503 if (SCTP_BUF_IS_EXTENDED(mat)) {
8504 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8506 mat = SCTP_BUF_NEXT(mat);
8512 at += SCTP_SIZE32(plen);
8514 if (cookie == NULL) {
8515 /* Did not find the cookie */
8518 /* ok, we got the cookie lets change it into a cookie echo chunk */
8520 /* first the change from param to cookie */
8521 hdr = mtod(cookie, struct sctp_chunkhdr *);
8522 hdr->chunk_type = SCTP_COOKIE_ECHO;
8523 hdr->chunk_flags = 0;
8524 /* get the chunk stuff now and place it in the FRONT of the queue */
8525 sctp_alloc_a_chunk(stcb, chk);
8528 sctp_m_freem(cookie);
8531 chk->copy_by_ref = 0;
8532 chk->send_size = plen;
8533 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8534 chk->rec.chunk_id.can_take_data = 0;
8535 chk->sent = SCTP_DATAGRAM_UNSENT;
8537 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8538 chk->asoc = &stcb->asoc;
8540 chk->whoTo = chk->asoc->primary_destination;
8541 atomic_add_int(&chk->whoTo->ref_count, 1);
8542 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8543 chk->asoc->ctrl_queue_cnt++;
8548 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
8552 struct sctp_nets *net)
8555 * take a HB request and make it into a HB ack and send it.
8557 struct mbuf *outchain;
8558 struct sctp_chunkhdr *chdr;
8559 struct sctp_tmit_chunk *chk;
8563 /* must have a net pointer */
8566 outchain = SCTP_M_COPYM(m, offset, chk_length, M_DONTWAIT);
8567 if (outchain == NULL) {
8568 /* gak out of memory */
8571 #ifdef SCTP_MBUF_LOGGING
8572 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8577 if (SCTP_BUF_IS_EXTENDED(mat)) {
8578 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8580 mat = SCTP_BUF_NEXT(mat);
8584 chdr = mtod(outchain, struct sctp_chunkhdr *);
8585 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
8586 chdr->chunk_flags = 0;
8587 if (chk_length % 4) {
8589 uint32_t cpthis = 0;
8592 padlen = 4 - (chk_length % 4);
8593 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
8595 sctp_alloc_a_chunk(stcb, chk);
8598 sctp_m_freem(outchain);
8601 chk->copy_by_ref = 0;
8602 chk->send_size = chk_length;
8603 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
8604 chk->rec.chunk_id.can_take_data = 1;
8605 chk->sent = SCTP_DATAGRAM_UNSENT;
8608 chk->asoc = &stcb->asoc;
8609 chk->data = outchain;
8611 atomic_add_int(&chk->whoTo->ref_count, 1);
8612 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8613 chk->asoc->ctrl_queue_cnt++;
8617 sctp_send_cookie_ack(struct sctp_tcb *stcb)
8619 /* formulate and queue a cookie-ack back to sender */
8620 struct mbuf *cookie_ack;
8621 struct sctp_chunkhdr *hdr;
8622 struct sctp_tmit_chunk *chk;
8625 SCTP_TCB_LOCK_ASSERT(stcb);
8627 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
8628 if (cookie_ack == NULL) {
8632 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
8633 sctp_alloc_a_chunk(stcb, chk);
8636 sctp_m_freem(cookie_ack);
8639 chk->copy_by_ref = 0;
8640 chk->send_size = sizeof(struct sctp_chunkhdr);
8641 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
8642 chk->rec.chunk_id.can_take_data = 1;
8643 chk->sent = SCTP_DATAGRAM_UNSENT;
8646 chk->asoc = &stcb->asoc;
8647 chk->data = cookie_ack;
8648 if (chk->asoc->last_control_chunk_from != NULL) {
8649 chk->whoTo = chk->asoc->last_control_chunk_from;
8651 chk->whoTo = chk->asoc->primary_destination;
8653 atomic_add_int(&chk->whoTo->ref_count, 1);
8654 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
8655 hdr->chunk_type = SCTP_COOKIE_ACK;
8656 hdr->chunk_flags = 0;
8657 hdr->chunk_length = htons(chk->send_size);
8658 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
8659 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8660 chk->asoc->ctrl_queue_cnt++;
8666 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
8668 /* formulate and queue a SHUTDOWN-ACK back to the sender */
8669 struct mbuf *m_shutdown_ack;
8670 struct sctp_shutdown_ack_chunk *ack_cp;
8671 struct sctp_tmit_chunk *chk;
8673 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
8674 if (m_shutdown_ack == NULL) {
8678 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
8679 sctp_alloc_a_chunk(stcb, chk);
8682 sctp_m_freem(m_shutdown_ack);
8685 chk->copy_by_ref = 0;
8686 chk->send_size = sizeof(struct sctp_chunkhdr);
8687 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
8688 chk->rec.chunk_id.can_take_data = 1;
8689 chk->sent = SCTP_DATAGRAM_UNSENT;
8692 chk->asoc = &stcb->asoc;
8693 chk->data = m_shutdown_ack;
8695 atomic_add_int(&net->ref_count, 1);
8697 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
8698 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
8699 ack_cp->ch.chunk_flags = 0;
8700 ack_cp->ch.chunk_length = htons(chk->send_size);
8701 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
8702 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8703 chk->asoc->ctrl_queue_cnt++;
8708 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
8710 /* formulate and queue a SHUTDOWN to the sender */
8711 struct mbuf *m_shutdown;
8712 struct sctp_shutdown_chunk *shutdown_cp;
8713 struct sctp_tmit_chunk *chk;
8715 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
8716 if (m_shutdown == NULL) {
8720 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
8721 sctp_alloc_a_chunk(stcb, chk);
8724 sctp_m_freem(m_shutdown);
8727 chk->copy_by_ref = 0;
8728 chk->send_size = sizeof(struct sctp_shutdown_chunk);
8729 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
8730 chk->rec.chunk_id.can_take_data = 1;
8731 chk->sent = SCTP_DATAGRAM_UNSENT;
8734 chk->asoc = &stcb->asoc;
8735 chk->data = m_shutdown;
8737 atomic_add_int(&net->ref_count, 1);
8739 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
8740 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
8741 shutdown_cp->ch.chunk_flags = 0;
8742 shutdown_cp->ch.chunk_length = htons(chk->send_size);
8743 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
8744 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
8745 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8746 chk->asoc->ctrl_queue_cnt++;
8751 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
8754 * formulate and queue an ASCONF to the peer. ASCONF parameters
8755 * should be queued on the assoc queue.
8757 struct sctp_tmit_chunk *chk;
8758 struct mbuf *m_asconf;
8761 SCTP_TCB_LOCK_ASSERT(stcb);
8763 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
8764 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
8765 /* can't send a new one if there is one in flight already */
8768 /* compose an ASCONF chunk, maximum length is PMTU */
8769 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
8770 if (m_asconf == NULL) {
8773 sctp_alloc_a_chunk(stcb, chk);
8776 sctp_m_freem(m_asconf);
8779 chk->copy_by_ref = 0;
8780 chk->data = m_asconf;
8781 chk->send_size = len;
8782 chk->rec.chunk_id.id = SCTP_ASCONF;
8783 chk->rec.chunk_id.can_take_data = 0;
8784 chk->sent = SCTP_DATAGRAM_UNSENT;
8786 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8787 chk->asoc = &stcb->asoc;
8789 atomic_add_int(&chk->whoTo->ref_count, 1);
8790 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
8791 chk->asoc->ctrl_queue_cnt++;
8796 sctp_send_asconf_ack(struct sctp_tcb *stcb)
8799 * formulate and queue a asconf-ack back to sender. the asconf-ack
8800 * must be stored in the tcb.
8802 struct sctp_tmit_chunk *chk;
8803 struct sctp_asconf_ack *ack, *latest_ack;
8804 struct mbuf *m_ack, *m;
8805 struct sctp_nets *net = NULL;
8807 SCTP_TCB_LOCK_ASSERT(stcb);
8808 /* Get the latest ASCONF-ACK */
8809 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
8810 if (latest_ack == NULL) {
8813 if (latest_ack->last_sent_to != NULL &&
8814 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
8815 /* we're doing a retransmission */
8816 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
8819 if (stcb->asoc.last_control_chunk_from == NULL)
8820 net = stcb->asoc.primary_destination;
8822 net = stcb->asoc.last_control_chunk_from;
8826 if (stcb->asoc.last_control_chunk_from == NULL)
8827 net = stcb->asoc.primary_destination;
8829 net = stcb->asoc.last_control_chunk_from;
8831 latest_ack->last_sent_to = net;
8833 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
8834 if (ack->data == NULL) {
8837 /* copy the asconf_ack */
8838 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_DONTWAIT);
8839 if (m_ack == NULL) {
8840 /* couldn't copy it */
8843 #ifdef SCTP_MBUF_LOGGING
8844 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8849 if (SCTP_BUF_IS_EXTENDED(mat)) {
8850 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8852 mat = SCTP_BUF_NEXT(mat);
8857 sctp_alloc_a_chunk(stcb, chk);
8861 sctp_m_freem(m_ack);
8864 chk->copy_by_ref = 0;
8871 chk->send_size = ack->len;
8872 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
8873 chk->rec.chunk_id.can_take_data = 1;
8874 chk->sent = SCTP_DATAGRAM_UNSENT;
8876 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */
8877 chk->asoc = &stcb->asoc;
8878 atomic_add_int(&chk->whoTo->ref_count, 1);
8880 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8881 chk->asoc->ctrl_queue_cnt++;
8888 sctp_chunk_retransmission(struct sctp_inpcb *inp,
8889 struct sctp_tcb *stcb,
8890 struct sctp_association *asoc,
8891 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
8892 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
8898 * send out one MTU of retransmission. If fast_retransmit is
8899 * happening we ignore the cwnd. Otherwise we obey the cwnd and
8900 * rwnd. For a Cookie or Asconf in the control chunk queue we
8901 * retransmit them by themselves.
8903 * For data chunks we will pick out the lowest TSN's in the sent_queue
8904 * marked for resend and bundle them all together (up to a MTU of
8905 * destination). The address to send to should have been
8906 * selected/changed where the retransmission was marked (i.e. in FR
8907 * or t3-timeout routines).
8909 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
8910 struct sctp_tmit_chunk *chk, *fwd;
8911 struct mbuf *m, *endofchain;
8912 struct sctp_nets *net = NULL;
8913 uint32_t tsns_sent = 0;
8914 int no_fragmentflg, bundle_at, cnt_thru;
8916 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
8917 struct sctp_auth_chunk *auth = NULL;
8918 uint32_t auth_offset = 0;
8919 uint16_t auth_keyid;
8920 int override_ok = 1;
8921 int data_auth_reqd = 0;
8924 SCTP_TCB_LOCK_ASSERT(stcb);
8925 tmr_started = ctl_cnt = bundle_at = error = 0;
8930 endofchain = m = NULL;
8931 auth_keyid = stcb->asoc.authinfo.active_keyid;
8932 #ifdef SCTP_AUDITING_ENABLED
8933 sctp_audit_log(0xC3, 1);
8935 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
8936 (TAILQ_EMPTY(&asoc->control_send_queue))) {
8937 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
8938 asoc->sent_queue_retran_cnt);
8939 asoc->sent_queue_cnt = 0;
8940 asoc->sent_queue_cnt_removeable = 0;
8941 /* send back 0/0 so we enter normal transmission */
8945 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
8946 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
8947 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
8948 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
8949 if (chk->sent != SCTP_DATAGRAM_RESEND) {
8952 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
8953 if (chk != asoc->str_reset) {
8955 * not eligible for retran if its
8962 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
8967 * Add an AUTH chunk, if chunk requires it save the
8968 * offset into the chain for AUTH
8970 if ((auth == NULL) &&
8971 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8972 stcb->asoc.peer_auth_chunks))) {
8973 m = sctp_add_auth_chunk(m, &endofchain,
8974 &auth, &auth_offset,
8976 chk->rec.chunk_id.id);
8977 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8979 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
8985 /* do we have control chunks to retransmit? */
8987 /* Start a timer no matter if we suceed or fail */
8988 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8989 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
8990 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
8991 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
8992 chk->snd_count++; /* update our count */
8993 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
8994 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
8995 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
8996 no_fragmentflg, 0, NULL, 0,
8997 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
8998 chk->whoTo->port, so_locked, NULL))) {
8999 SCTP_STAT_INCR(sctps_lowlevelerr);
9002 m = endofchain = NULL;
9006 * We don't want to mark the net->sent time here since this
9007 * we use this for HB and retrans cannot measure RTT
9009 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9011 chk->sent = SCTP_DATAGRAM_SENT;
9012 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9016 /* Clean up the fwd-tsn list */
9017 sctp_clean_up_ctl(stcb, asoc);
9022 * Ok, it is just data retransmission we need to do or that and a
9023 * fwd-tsn with it all.
9025 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9026 return (SCTP_RETRAN_DONE);
9028 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9029 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9030 /* not yet open, resend the cookie and that is it */
9033 #ifdef SCTP_AUDITING_ENABLED
9034 sctp_auditing(20, inp, stcb, NULL);
9036 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9037 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9038 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9039 /* No, not sent to this net or not ready for rtx */
9042 if (chk->data == NULL) {
9043 printf("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9044 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9047 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9048 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9049 /* Gak, we have exceeded max unlucky retran, abort! */
9050 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9052 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9053 atomic_add_int(&stcb->asoc.refcnt, 1);
9054 sctp_abort_an_association(stcb->sctp_ep, stcb, 0, NULL, so_locked);
9055 SCTP_TCB_LOCK(stcb);
9056 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9057 return (SCTP_RETRAN_EXIT);
9059 /* pick up the net */
9061 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
9062 mtu = (net->mtu - SCTP_MIN_OVERHEAD);
9064 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9067 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9068 /* No room in peers rwnd */
9071 tsn = asoc->last_acked_seq + 1;
9072 if (tsn == chk->rec.data.TSN_seq) {
9074 * we make a special exception for this
9075 * case. The peer has no rwnd but is missing
9076 * the lowest chunk.. which is probably what
9077 * is holding up the rwnd.
9079 goto one_chunk_around;
9084 if (asoc->peers_rwnd < mtu) {
9086 if ((asoc->peers_rwnd == 0) &&
9087 (asoc->total_flight == 0)) {
9088 chk->window_probe = 1;
9089 chk->whoTo->window_probe = 1;
9092 #ifdef SCTP_AUDITING_ENABLED
9093 sctp_audit_log(0xC3, 2);
9097 net->fast_retran_ip = 0;
9098 if (chk->rec.data.doing_fast_retransmit == 0) {
9100 * if no FR in progress skip destination that have
9101 * flight_size > cwnd.
9103 if (net->flight_size >= net->cwnd) {
9108 * Mark the destination net to have FR recovery
9112 net->fast_retran_ip = 1;
9116 * if no AUTH is yet included and this chunk requires it,
9117 * make sure to account for it. We don't apply the size
9118 * until the AUTH chunk is actually added below in case
9119 * there is no room for this chunk.
9121 if (data_auth_reqd && (auth == NULL)) {
9122 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9126 if ((chk->send_size <= (mtu - dmtu)) ||
9127 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9128 /* ok we will add this one */
9129 if (data_auth_reqd) {
9131 m = sctp_add_auth_chunk(m,
9137 auth_keyid = chk->auth_keyid;
9139 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9140 } else if (override_ok) {
9141 auth_keyid = chk->auth_keyid;
9143 } else if (chk->auth_keyid != auth_keyid) {
9144 /* different keyid, so done bundling */
9148 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9150 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9153 /* Do clear IP_DF ? */
9154 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9157 /* upate our MTU size */
9158 if (mtu > (chk->send_size + dmtu))
9159 mtu -= (chk->send_size + dmtu);
9162 data_list[bundle_at++] = chk;
9163 if (one_chunk && (asoc->total_flight <= 0)) {
9164 SCTP_STAT_INCR(sctps_windowprobed);
9167 if (one_chunk == 0) {
9169 * now are there anymore forward from chk to pick
9172 fwd = TAILQ_NEXT(chk, sctp_next);
9174 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9175 /* Nope, not for retran */
9176 fwd = TAILQ_NEXT(fwd, sctp_next);
9179 if (fwd->whoTo != net) {
9180 /* Nope, not the net in question */
9181 fwd = TAILQ_NEXT(fwd, sctp_next);
9184 if (data_auth_reqd && (auth == NULL)) {
9185 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9188 if (fwd->send_size <= (mtu - dmtu)) {
9189 if (data_auth_reqd) {
9191 m = sctp_add_auth_chunk(m,
9197 auth_keyid = fwd->auth_keyid;
9199 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9200 } else if (override_ok) {
9201 auth_keyid = fwd->auth_keyid;
9203 } else if (fwd->auth_keyid != auth_keyid) {
9211 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9213 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9216 /* Do clear IP_DF ? */
9217 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9220 /* upate our MTU size */
9221 if (mtu > (fwd->send_size + dmtu))
9222 mtu -= (fwd->send_size + dmtu);
9225 data_list[bundle_at++] = fwd;
9226 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9229 fwd = TAILQ_NEXT(fwd, sctp_next);
9231 /* can't fit so we are done */
9236 /* Is there something to send for this destination? */
9239 * No matter if we fail/or suceed we should start a
9240 * timer. A failure is like a lost IP packet :-)
9242 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9244 * no timer running on this destination
9247 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9250 /* Now lets send it, if there is anything to send :> */
9251 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9252 (struct sockaddr *)&net->ro._l_addr, m,
9253 auth_offset, auth, auth_keyid,
9254 no_fragmentflg, 0, NULL, 0,
9255 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9256 net->port, so_locked, NULL))) {
9257 /* error, we could not output */
9258 SCTP_STAT_INCR(sctps_lowlevelerr);
9261 m = endofchain = NULL;
9266 * We don't want to mark the net->sent time here
9267 * since this we use this for HB and retrans cannot
9270 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9272 /* For auto-close */
9274 if (*now_filled == 0) {
9275 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9276 *now = asoc->time_last_sent;
9279 asoc->time_last_sent = *now;
9281 *cnt_out += bundle_at;
9282 #ifdef SCTP_AUDITING_ENABLED
9283 sctp_audit_log(0xC4, bundle_at);
9286 tsns_sent = data_list[0]->rec.data.TSN_seq;
9288 for (i = 0; i < bundle_at; i++) {
9289 SCTP_STAT_INCR(sctps_sendretransdata);
9290 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9292 * When we have a revoked data, and we
9293 * retransmit it, then we clear the revoked
9294 * flag since this flag dictates if we
9295 * subtracted from the fs
9297 if (data_list[i]->rec.data.chunk_was_revoked) {
9298 /* Deflate the cwnd */
9299 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9300 data_list[i]->rec.data.chunk_was_revoked = 0;
9302 data_list[i]->snd_count++;
9303 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9304 /* record the time */
9305 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9306 if (data_list[i]->book_size_scale) {
9308 * need to double the book size on
9311 data_list[i]->book_size_scale = 0;
9313 * Since we double the booksize, we
9314 * must also double the output queue
9315 * size, since this get shrunk when
9316 * we free by this amount.
9318 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9319 data_list[i]->book_size *= 2;
9323 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9324 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9325 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9327 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9328 (uint32_t) (data_list[i]->send_size +
9329 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9331 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9332 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9333 data_list[i]->whoTo->flight_size,
9334 data_list[i]->book_size,
9335 (uintptr_t) data_list[i]->whoTo,
9336 data_list[i]->rec.data.TSN_seq);
9338 sctp_flight_size_increase(data_list[i]);
9339 sctp_total_flight_increase(stcb, data_list[i]);
9340 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9341 /* SWS sender side engages */
9342 asoc->peers_rwnd = 0;
9345 (data_list[i]->rec.data.doing_fast_retransmit)) {
9346 SCTP_STAT_INCR(sctps_sendfastretrans);
9347 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9348 (tmr_started == 0)) {
9350 * ok we just fast-retrans'd
9351 * the lowest TSN, i.e the
9352 * first on the list. In
9353 * this case we want to give
9354 * some more time to get a
9355 * SACK back without a
9358 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9359 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
9360 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9364 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9365 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9367 #ifdef SCTP_AUDITING_ENABLED
9368 sctp_auditing(21, inp, stcb, NULL);
9374 if (asoc->sent_queue_retran_cnt <= 0) {
9375 /* all done we have no more to retran */
9376 asoc->sent_queue_retran_cnt = 0;
9380 /* No more room in rwnd */
9383 /* stop the for loop here. we sent out a packet */
9391 sctp_timer_validation(struct sctp_inpcb *inp,
9392 struct sctp_tcb *stcb,
9393 struct sctp_association *asoc,
9396 struct sctp_nets *net;
9398 /* Validate that a timer is running somewhere */
9399 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9400 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9401 /* Here is a timer */
9405 SCTP_TCB_LOCK_ASSERT(stcb);
9406 /* Gak, we did not have a timer somewhere */
9407 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9408 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9413 sctp_chunk_output(struct sctp_inpcb *inp,
9414 struct sctp_tcb *stcb,
9417 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9423 * Ok this is the generic chunk service queue. we must do the
9425 * - See if there are retransmits pending, if so we must
9427 * - Service the stream queue that is next, moving any
9428 * message (note I must get a complete message i.e.
9429 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9431 * - Check to see if the cwnd/rwnd allows any output, if so we
9432 * go ahead and fomulate and send the low level chunks. Making sure
9433 * to combine any control in the control chunk queue also.
9435 struct sctp_association *asoc;
9436 struct sctp_nets *net;
9437 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0,
9438 burst_cnt = 0, burst_limit = 0;
9442 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9444 int fr_done, tot_frs = 0;
9447 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9448 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9454 SCTP_TCB_LOCK_ASSERT(stcb);
9456 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9458 if ((un_sent <= 0) &&
9459 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9460 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9461 (asoc->sent_queue_retran_cnt == 0)) {
9462 /* Nothing to do unless there is something to be sent left */
9466 * Do we have something to send, data or control AND a sack timer
9467 * running, if so piggy-back the sack.
9469 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9470 sctp_send_sack(stcb);
9471 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9473 while (asoc->sent_queue_retran_cnt) {
9475 * Ok, it is retransmission time only, we send out only ONE
9476 * packet with a single call off to the retran code.
9478 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9480 * Special hook for handling cookiess discarded
9481 * by peer that carried data. Send cookie-ack only
9482 * and then the next call with get the retran's.
9484 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9486 &now, &now_filled, frag_point, so_locked);
9488 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9489 /* if its not from a HB then do it */
9491 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9497 * its from any other place, we don't allow retran
9498 * output (only control)
9503 /* Can't send anymore */
9505 * now lets push out control by calling med-level
9506 * output once. this assures that we WILL send HB's
9509 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9511 &now, &now_filled, frag_point, so_locked);
9512 #ifdef SCTP_AUDITING_ENABLED
9513 sctp_auditing(8, inp, stcb, NULL);
9515 (void)sctp_timer_validation(inp, stcb, asoc, ret);
9520 * The count was off.. retran is not happening so do
9521 * the normal retransmission.
9523 #ifdef SCTP_AUDITING_ENABLED
9524 sctp_auditing(9, inp, stcb, NULL);
9526 if (ret == SCTP_RETRAN_EXIT) {
9531 if (from_where == SCTP_OUTPUT_FROM_T3) {
9532 /* Only one transmission allowed out of a timeout */
9533 #ifdef SCTP_AUDITING_ENABLED
9534 sctp_auditing(10, inp, stcb, NULL);
9536 /* Push out any control */
9537 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
9538 &now, &now_filled, frag_point, so_locked);
9541 if (tot_frs > asoc->max_burst) {
9542 /* Hit FR burst limit */
9545 if ((num_out == 0) && (ret == 0)) {
9547 /* No more retrans to send */
9551 #ifdef SCTP_AUDITING_ENABLED
9552 sctp_auditing(12, inp, stcb, NULL);
9554 /* Check for bad destinations, if they exist move chunks around. */
9555 burst_limit = asoc->max_burst;
9556 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9557 if ((net->dest_state & SCTP_ADDR_NOT_REACHABLE) ==
9558 SCTP_ADDR_NOT_REACHABLE) {
9560 * if possible move things off of this address we
9561 * still may send below due to the dormant state but
9562 * we try to find an alternate address to send to
9563 * and if we have one we move all queued data on the
9564 * out wheel to this alternate address.
9566 if (net->ref_count > 1)
9567 sctp_move_chunks_from_net(stcb, net);
9568 } else if ((asoc->sctp_cmt_on_off == 1) &&
9569 (asoc->sctp_cmt_pf > 0) &&
9570 ((net->dest_state & SCTP_ADDR_PF) == SCTP_ADDR_PF)) {
9572 * JRS 5/14/07 - If CMT PF is on and the current
9573 * destination is in PF state, move all queued data
9574 * to an alternate desination.
9576 if (net->ref_count > 1)
9577 sctp_move_chunks_from_net(stcb, net);
9580 * if ((asoc->sat_network) || (net->addr_is_local))
9581 * { burst_limit = asoc->max_burst *
9582 * SCTP_SAT_NETWORK_BURST_INCR; }
9584 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
9585 if ((net->flight_size + (burst_limit * net->mtu)) < net->cwnd) {
9587 * JRS - Use the congestion control
9588 * given in the congestion control
9591 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, burst_limit);
9592 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
9593 sctp_log_maxburst(stcb, net, 0, burst_limit, SCTP_MAX_BURST_APPLIED);
9595 SCTP_STAT_INCR(sctps_maxburstqueued);
9597 net->fast_retran_ip = 0;
9599 if (net->flight_size == 0) {
9600 /* Should be decaying the cwnd here */
9609 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
9610 &reason_code, 0, from_where,
9611 &now, &now_filled, frag_point, so_locked);
9613 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
9614 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
9615 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
9617 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9618 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
9619 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
9623 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
9627 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9628 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
9630 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
9635 * When nagle is on, we look at how much is un_sent, then
9636 * if its smaller than an MTU and we have data in
9639 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
9640 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
9641 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
9642 (stcb->asoc.total_flight > 0)) {
9646 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
9647 TAILQ_EMPTY(&asoc->send_queue) &&
9648 TAILQ_EMPTY(&asoc->out_wheel)) {
9649 /* Nothing left to send */
9652 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
9653 /* Nothing left to send */
9656 } while (num_out && (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
9657 (burst_cnt < burst_limit)));
9659 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
9660 if (burst_cnt >= burst_limit) {
9661 SCTP_STAT_INCR(sctps_maxburstqueued);
9662 asoc->burst_limit_applied = 1;
9663 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
9664 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
9667 asoc->burst_limit_applied = 0;
9670 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9671 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
9673 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
9677 * Now we need to clean up the control chunk chain if a ECNE is on
9678 * it. It must be marked as UNSENT again so next call will continue
9679 * to send it until such time that we get a CWR, to remove it.
9681 if (stcb->asoc.ecn_echo_cnt_onq)
9682 sctp_fix_ecn_echo(asoc);
9688 sctp_output(inp, m, addr, control, p, flags)
9689 struct sctp_inpcb *inp;
9691 struct sockaddr *addr;
9692 struct mbuf *control;
9697 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
9700 if (inp->sctp_socket == NULL) {
9701 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
9704 return (sctp_sosend(inp->sctp_socket,
9714 send_forward_tsn(struct sctp_tcb *stcb,
9715 struct sctp_association *asoc)
9717 struct sctp_tmit_chunk *chk;
9718 struct sctp_forward_tsn_chunk *fwdtsn;
9719 uint32_t advance_peer_ack_point;
9721 SCTP_TCB_LOCK_ASSERT(stcb);
9722 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9723 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9724 /* mark it to unsent */
9725 chk->sent = SCTP_DATAGRAM_UNSENT;
9727 /* Do we correct its output location? */
9728 if (chk->whoTo != asoc->primary_destination) {
9729 sctp_free_remote_addr(chk->whoTo);
9730 chk->whoTo = asoc->primary_destination;
9731 atomic_add_int(&chk->whoTo->ref_count, 1);
9733 goto sctp_fill_in_rest;
9736 /* Ok if we reach here we must build one */
9737 sctp_alloc_a_chunk(stcb, chk);
9741 asoc->fwd_tsn_cnt++;
9742 chk->copy_by_ref = 0;
9743 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
9744 chk->rec.chunk_id.can_take_data = 0;
9747 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
9748 if (chk->data == NULL) {
9749 sctp_free_a_chunk(stcb, chk);
9752 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
9753 chk->sent = SCTP_DATAGRAM_UNSENT;
9755 chk->whoTo = asoc->primary_destination;
9756 atomic_add_int(&chk->whoTo->ref_count, 1);
9757 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
9758 asoc->ctrl_queue_cnt++;
9761 * Here we go through and fill out the part that deals with
9762 * stream/seq of the ones we skip.
9764 SCTP_BUF_LEN(chk->data) = 0;
9766 struct sctp_tmit_chunk *at, *tp1, *last;
9767 struct sctp_strseq *strseq;
9768 unsigned int cnt_of_space, i, ovh;
9769 unsigned int space_needed;
9770 unsigned int cnt_of_skipped = 0;
9772 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
9773 if (at->sent != SCTP_FORWARD_TSN_SKIP) {
9774 /* no more to look at */
9777 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
9778 /* We don't report these */
9783 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
9784 (cnt_of_skipped * sizeof(struct sctp_strseq)));
9786 cnt_of_space = M_TRAILINGSPACE(chk->data);
9788 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
9789 ovh = SCTP_MIN_OVERHEAD;
9791 ovh = SCTP_MIN_V4_OVERHEAD;
9793 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
9794 /* trim to a mtu size */
9795 cnt_of_space = asoc->smallest_mtu - ovh;
9797 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
9798 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
9799 0xff, 0, cnt_of_skipped,
9800 asoc->advanced_peer_ack_point);
9803 advance_peer_ack_point = asoc->advanced_peer_ack_point;
9804 if (cnt_of_space < space_needed) {
9806 * ok we must trim down the chunk by lowering the
9807 * advance peer ack point.
9809 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
9810 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
9811 0xff, 0xff, cnt_of_space,
9814 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
9815 cnt_of_skipped /= sizeof(struct sctp_strseq);
9817 * Go through and find the TSN that will be the one
9820 at = TAILQ_FIRST(&asoc->sent_queue);
9821 for (i = 0; i < cnt_of_skipped; i++) {
9822 tp1 = TAILQ_NEXT(at, sctp_next);
9828 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
9829 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
9830 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
9831 asoc->advanced_peer_ack_point);
9835 * last now points to last one I can report, update
9839 advance_peer_ack_point = last->rec.data.TSN_seq;
9840 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
9841 cnt_of_skipped * sizeof(struct sctp_strseq);
9843 chk->send_size = space_needed;
9844 /* Setup the chunk */
9845 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
9846 fwdtsn->ch.chunk_length = htons(chk->send_size);
9847 fwdtsn->ch.chunk_flags = 0;
9848 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
9849 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
9850 SCTP_BUF_LEN(chk->data) = chk->send_size;
9853 * Move pointer to after the fwdtsn and transfer to the
9856 strseq = (struct sctp_strseq *)fwdtsn;
9858 * Now populate the strseq list. This is done blindly
9859 * without pulling out duplicate stream info. This is
9860 * inefficent but won't harm the process since the peer will
9861 * look at these in sequence and will thus release anything.
9862 * It could mean we exceed the PMTU and chop off some that
9863 * we could have included.. but this is unlikely (aka 1432/4
9864 * would mean 300+ stream seq's would have to be reported in
9865 * one FWD-TSN. With a bit of work we can later FIX this to
9866 * optimize and pull out duplcates.. but it does add more
9867 * overhead. So for now... not!
9869 at = TAILQ_FIRST(&asoc->sent_queue);
9870 for (i = 0; i < cnt_of_skipped; i++) {
9871 tp1 = TAILQ_NEXT(at, sctp_next);
9874 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
9875 /* We don't report these */
9880 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
9881 at->rec.data.fwd_tsn_cnt = 0;
9883 strseq->stream = ntohs(at->rec.data.stream_number);
9884 strseq->sequence = ntohs(at->rec.data.stream_seq);
9894 sctp_send_sack(struct sctp_tcb *stcb)
9897 * Queue up a SACK or NR-SACK in the control queue.
9898 * We must first check to see if a SACK or NR-SACK is
9899 * somehow on the control queue.
9900 * If so, we will take and and remove the old one.
9902 struct sctp_association *asoc;
9903 struct sctp_tmit_chunk *chk, *a_chk;
9904 struct sctp_sack_chunk *sack;
9905 struct sctp_nr_sack_chunk *nr_sack;
9906 struct sctp_gap_ack_block *gap_descriptor;
9907 struct sack_track *selector;
9912 int limit_reached = 0;
9913 unsigned int i, sel_start, siz, j, starting_index;
9914 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
9917 uint32_t highest_tsn;
9921 if ((stcb->asoc.sctp_nr_sack_on_off == 1) &&
9922 (stcb->asoc.peer_supports_nr_sack == 1)) {
9923 type = SCTP_NR_SELECTIVE_ACK;
9925 type = SCTP_SELECTIVE_ACK;
9929 SCTP_TCB_LOCK_ASSERT(stcb);
9930 if (asoc->last_data_chunk_from == NULL) {
9931 /* Hmm we never received anything */
9934 sctp_slide_mapping_arrays(stcb);
9935 sctp_set_rwnd(stcb, asoc);
9936 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9937 if (chk->rec.chunk_id.id == type) {
9938 /* Hmm, found a sack already on queue, remove it */
9939 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
9940 asoc->ctrl_queue_cnt++;
9943 sctp_m_freem(a_chk->data);
9946 sctp_free_remote_addr(a_chk->whoTo);
9947 a_chk->whoTo = NULL;
9951 if (a_chk == NULL) {
9952 sctp_alloc_a_chunk(stcb, a_chk);
9953 if (a_chk == NULL) {
9954 /* No memory so we drop the idea, and set a timer */
9955 if (stcb->asoc.delayed_ack) {
9956 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
9957 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
9958 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
9959 stcb->sctp_ep, stcb, NULL);
9961 stcb->asoc.send_sack = 1;
9965 a_chk->copy_by_ref = 0;
9966 a_chk->rec.chunk_id.id = type;
9967 a_chk->rec.chunk_id.can_take_data = 1;
9969 /* Clear our pkt counts */
9970 asoc->data_pkts_seen = 0;
9973 a_chk->snd_count = 0;
9974 a_chk->send_size = 0; /* fill in later */
9975 a_chk->sent = SCTP_DATAGRAM_UNSENT;
9976 a_chk->whoTo = NULL;
9978 if ((asoc->numduptsns) ||
9979 (asoc->last_data_chunk_from->dest_state & SCTP_ADDR_NOT_REACHABLE)
9982 * Ok, we have some duplicates or the destination for the
9983 * sack is unreachable, lets see if we can select an
9984 * alternate than asoc->last_data_chunk_from
9986 if ((!(asoc->last_data_chunk_from->dest_state &
9987 SCTP_ADDR_NOT_REACHABLE)) &&
9988 (asoc->used_alt_onsack > asoc->numnets)) {
9989 /* We used an alt last time, don't this time */
9990 a_chk->whoTo = NULL;
9992 asoc->used_alt_onsack++;
9993 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
9995 if (a_chk->whoTo == NULL) {
9996 /* Nope, no alternate */
9997 a_chk->whoTo = asoc->last_data_chunk_from;
9998 asoc->used_alt_onsack = 0;
10002 * No duplicates so we use the last place we received data
10005 asoc->used_alt_onsack = 0;
10006 a_chk->whoTo = asoc->last_data_chunk_from;
10008 if (a_chk->whoTo) {
10009 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10011 if (compare_with_wrap(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map, MAX_TSN)) {
10012 highest_tsn = asoc->highest_tsn_inside_map;
10014 highest_tsn = asoc->highest_tsn_inside_nr_map;
10016 if (highest_tsn == asoc->cumulative_tsn) {
10018 if (type == SCTP_SELECTIVE_ACK) {
10019 space_req = sizeof(struct sctp_sack_chunk);
10021 space_req = sizeof(struct sctp_nr_sack_chunk);
10024 /* gaps get a cluster */
10025 space_req = MCLBYTES;
10027 /* Ok now lets formulate a MBUF with our sack */
10028 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_DONTWAIT, 1, MT_DATA);
10029 if ((a_chk->data == NULL) ||
10030 (a_chk->whoTo == NULL)) {
10031 /* rats, no mbuf memory */
10033 /* was a problem with the destination */
10034 sctp_m_freem(a_chk->data);
10035 a_chk->data = NULL;
10037 sctp_free_a_chunk(stcb, a_chk);
10038 /* sa_ignore NO_NULL_CHK */
10039 if (stcb->asoc.delayed_ack) {
10040 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10041 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
10042 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10043 stcb->sctp_ep, stcb, NULL);
10045 stcb->asoc.send_sack = 1;
10049 /* ok, lets go through and fill it in */
10050 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10051 space = M_TRAILINGSPACE(a_chk->data);
10052 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10053 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10055 limit = mtod(a_chk->data, caddr_t);
10058 /* 0x01 is used by nonce for ecn */
10059 if ((SCTP_BASE_SYSCTL(sctp_ecn_enable)) &&
10060 (SCTP_BASE_SYSCTL(sctp_ecn_nonce)) &&
10061 (asoc->peer_supports_ecn_nonce))
10062 flags = (asoc->receiver_nonce_sum & SCTP_SACK_NONCE_SUM);
10066 if ((asoc->sctp_cmt_on_off == 1) &&
10067 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10069 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10070 * received, then set high bit to 1, else 0. Reset
10073 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10074 asoc->cmt_dac_pkts_rcvd = 0;
10076 #ifdef SCTP_ASOCLOG_OF_TSNS
10077 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10078 stcb->asoc.cumack_log_atsnt++;
10079 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10080 stcb->asoc.cumack_log_atsnt = 0;
10083 /* reset the readers interpretation */
10084 stcb->freed_by_sorcv_sincelast = 0;
10086 if (type == SCTP_SELECTIVE_ACK) {
10087 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10089 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10090 if (highest_tsn > asoc->mapping_array_base_tsn) {
10091 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10093 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10097 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10098 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10099 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10100 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10102 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10106 if (compare_with_wrap(asoc->mapping_array_base_tsn, asoc->cumulative_tsn, MAX_TSN)) {
10109 * The base TSN is intialized to be the first TSN the peer
10110 * will send us. If the cum-ack is behind this then when they
10111 * send us the next in sequence it will mark the base_tsn bit.
10112 * Thus we need to use the very first selector and the offset
10113 * is 1. Our table is built for this case.
10115 starting_index = 0;
10119 * we skip the first selector when the cum-ack is at or above the
10120 * mapping array base. This is because the bits at the base or above
10121 * are turned on and our first selector in the table assumes they are
10122 * off. We thus will use the second selector (first is 0). We use
10123 * the reverse of our macro to fix the offset, in bits, that our
10124 * table is at. Note that this method assumes that the cum-tsn is
10125 * within the first bit, i.e. its value is 0-7 which means the
10126 * result to our offset will be either a 0 - -7. If the cumack
10127 * is NOT in the first byte (0) (which it should be since we did
10128 * a mapping array slide above) then we need to calculate the starting
10129 * index i.e. which byte of the mapping array we should start at. We
10130 * do this by dividing by 8 and pushing the remainder (mod) into offset.
10131 * then we multiply the offset to be negative, since we need a negative
10132 * offset into the selector table.
10134 SCTP_CALC_TSN_TO_GAP(offset, asoc->cumulative_tsn, asoc->mapping_array_base_tsn);
10136 starting_index = offset / 8;
10137 offset = offset % 8;
10138 printf("Strange starting index is %d offset:%d (not 0/x)\n",
10139 starting_index, offset);
10141 starting_index = 0;
10143 /* We need a negative offset in our table */
10147 if (((type == SCTP_SELECTIVE_ACK) &&
10148 compare_with_wrap(highest_tsn, asoc->cumulative_tsn, MAX_TSN)) ||
10149 ((type == SCTP_NR_SELECTIVE_ACK) &&
10150 compare_with_wrap(asoc->highest_tsn_inside_map, asoc->cumulative_tsn, MAX_TSN))) {
10151 /* we have a gap .. maybe */
10152 for (i = starting_index; i < siz; i++) {
10153 if (type == SCTP_SELECTIVE_ACK) {
10154 selector = &sack_array[asoc->mapping_array[i] | asoc->nr_mapping_array[i]];
10156 selector = &sack_array[asoc->mapping_array[i]];
10158 if (mergeable && selector->right_edge) {
10160 * Backup, left and right edges were ok to
10166 if (selector->num_entries == 0)
10169 for (j = sel_start; j < selector->num_entries; j++) {
10170 if (mergeable && selector->right_edge) {
10172 * do a merge by NOT setting
10178 * no merge, set the left
10182 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10184 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10187 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10193 if (selector->left_edge) {
10197 if (limit_reached) {
10198 /* Reached the limit stop */
10205 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10206 (limit_reached == 0)) {
10210 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn)
10211 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10213 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10215 if (compare_with_wrap(asoc->mapping_array_base_tsn, asoc->cumulative_tsn, MAX_TSN)) {
10218 * cum-ack behind the mapping array, so we start and use all
10223 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10225 * we skip the first one when the cum-ack is at or above the
10226 * mapping array base. Note this only works if
10230 if (compare_with_wrap(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn, MAX_TSN)) {
10231 /* we have a gap .. maybe */
10232 for (i = 0; i < siz; i++) {
10233 selector = &sack_array[asoc->nr_mapping_array[i]];
10234 if (mergeable && selector->right_edge) {
10236 * Backup, left and right edges were
10239 num_nr_gap_blocks--;
10242 if (selector->num_entries == 0)
10245 for (j = sel_start; j < selector->num_entries; j++) {
10246 if (mergeable && selector->right_edge) {
10248 * do a merge by NOT
10255 * no merge, set the
10259 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10261 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10262 num_nr_gap_blocks++;
10264 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10270 if (selector->left_edge) {
10274 if (limit_reached) {
10275 /* Reached the limit stop */
10283 /* now we must add any dups we are going to report. */
10284 if ((limit_reached == 0) && (asoc->numduptsns)) {
10285 dup = (uint32_t *) gap_descriptor;
10286 for (i = 0; i < asoc->numduptsns; i++) {
10287 *dup = htonl(asoc->dup_tsns[i]);
10290 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10295 asoc->numduptsns = 0;
10298 * now that the chunk is prepared queue it to the control chunk
10301 if (type == SCTP_SELECTIVE_ACK) {
10302 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10303 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10304 num_dups * sizeof(int32_t);
10305 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10306 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10307 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10308 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10309 sack->sack.num_dup_tsns = htons(num_dups);
10310 sack->ch.chunk_type = type;
10311 sack->ch.chunk_flags = flags;
10312 sack->ch.chunk_length = htons(a_chk->send_size);
10314 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10315 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10316 num_dups * sizeof(int32_t);
10317 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10318 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10319 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10320 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10321 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10322 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10323 nr_sack->nr_sack.reserved = 0;
10324 nr_sack->ch.chunk_type = type;
10325 nr_sack->ch.chunk_flags = flags;
10326 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10328 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10329 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10330 asoc->ctrl_queue_cnt++;
10331 asoc->send_sack = 0;
10332 SCTP_STAT_INCR(sctps_sendsacks);
10337 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10338 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10343 struct mbuf *m_abort;
10344 struct mbuf *m_out = NULL, *m_end = NULL;
10345 struct sctp_abort_chunk *abort = NULL;
10347 uint32_t auth_offset = 0;
10348 struct sctp_auth_chunk *auth = NULL;
10351 * Add an AUTH chunk, if chunk requires it and save the offset into
10352 * the chain for AUTH
10354 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10355 stcb->asoc.peer_auth_chunks)) {
10356 m_out = sctp_add_auth_chunk(m_out, &m_end, &auth, &auth_offset,
10357 stcb, SCTP_ABORT_ASSOCIATION);
10358 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10360 SCTP_TCB_LOCK_ASSERT(stcb);
10361 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
10362 if (m_abort == NULL) {
10365 sctp_m_freem(m_out);
10368 /* link in any error */
10369 SCTP_BUF_NEXT(m_abort) = operr;
10376 sz += SCTP_BUF_LEN(n);
10377 n = SCTP_BUF_NEXT(n);
10380 SCTP_BUF_LEN(m_abort) = sizeof(*abort);
10381 if (m_out == NULL) {
10382 /* NO Auth chunk prepended, so reserve space in front */
10383 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10386 /* Put AUTH chunk at the front of the chain */
10387 SCTP_BUF_NEXT(m_end) = m_abort;
10390 /* fill in the ABORT chunk */
10391 abort = mtod(m_abort, struct sctp_abort_chunk *);
10392 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10393 abort->ch.chunk_flags = 0;
10394 abort->ch.chunk_length = htons(sizeof(*abort) + sz);
10396 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb,
10397 stcb->asoc.primary_destination,
10398 (struct sockaddr *)&stcb->asoc.primary_destination->ro._l_addr,
10399 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, NULL, 0,
10400 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
10401 stcb->asoc.primary_destination->port, so_locked, NULL);
10402 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10406 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10407 struct sctp_nets *net,
10410 /* formulate and SEND a SHUTDOWN-COMPLETE */
10411 struct mbuf *m_shutdown_comp;
10412 struct sctp_shutdown_complete_chunk *shutdown_complete;
10416 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
10417 if (m_shutdown_comp == NULL) {
10421 if (reflect_vtag) {
10422 flags = SCTP_HAD_NO_TCB;
10423 vtag = stcb->asoc.my_vtag;
10426 vtag = stcb->asoc.peer_vtag;
10428 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10429 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10430 shutdown_complete->ch.chunk_flags = flags;
10431 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10432 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10433 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10434 (struct sockaddr *)&net->ro._l_addr,
10435 m_shutdown_comp, 0, NULL, 0, 1, 0, NULL, 0,
10436 stcb->sctp_ep->sctp_lport, stcb->rport,
10438 net->port, SCTP_SO_NOT_LOCKED, NULL);
10439 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10444 sctp_send_shutdown_complete2(struct mbuf *m, int iphlen, struct sctphdr *sh,
10445 uint32_t vrf_id, uint16_t port)
10447 /* formulate and SEND a SHUTDOWN-COMPLETE */
10448 struct mbuf *o_pak;
10450 struct ip *iph, *iph_out;
10451 struct udphdr *udp = NULL;
10454 struct ip6_hdr *ip6, *ip6_out;
10457 int offset_out, len, mlen;
10458 struct sctp_shutdown_complete_msg *comp_cp;
10460 iph = mtod(m, struct ip *);
10461 switch (iph->ip_v) {
10463 len = (sizeof(struct ip) + sizeof(struct sctp_shutdown_complete_msg));
10466 case IPV6_VERSION >> 4:
10467 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_shutdown_complete_msg));
10474 len += sizeof(struct udphdr);
10476 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
10477 if (mout == NULL) {
10480 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10481 SCTP_BUF_LEN(mout) = len;
10482 SCTP_BUF_NEXT(mout) = NULL;
10489 switch (iph->ip_v) {
10491 iph_out = mtod(mout, struct ip *);
10493 /* Fill in the IP header for the ABORT */
10494 iph_out->ip_v = IPVERSION;
10495 iph_out->ip_hl = (sizeof(struct ip) / 4);
10496 iph_out->ip_tos = (u_char)0;
10497 iph_out->ip_id = 0;
10498 iph_out->ip_off = 0;
10499 iph_out->ip_ttl = MAXTTL;
10501 iph_out->ip_p = IPPROTO_UDP;
10503 iph_out->ip_p = IPPROTO_SCTP;
10505 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
10506 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
10508 /* let IP layer calculate this */
10509 iph_out->ip_sum = 0;
10510 offset_out += sizeof(*iph_out);
10511 comp_cp = (struct sctp_shutdown_complete_msg *)(
10512 (caddr_t)iph_out + offset_out);
10515 case IPV6_VERSION >> 4:
10516 ip6 = (struct ip6_hdr *)iph;
10517 ip6_out = mtod(mout, struct ip6_hdr *);
10519 /* Fill in the IPv6 header for the ABORT */
10520 ip6_out->ip6_flow = ip6->ip6_flow;
10521 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
10523 ip6_out->ip6_nxt = IPPROTO_UDP;
10525 ip6_out->ip6_nxt = IPPROTO_SCTP;
10527 ip6_out->ip6_src = ip6->ip6_dst;
10528 ip6_out->ip6_dst = ip6->ip6_src;
10530 * ?? The old code had both the iph len + payload, I think
10531 * this is wrong and would never have worked
10533 ip6_out->ip6_plen = sizeof(struct sctp_shutdown_complete_msg);
10534 offset_out += sizeof(*ip6_out);
10535 comp_cp = (struct sctp_shutdown_complete_msg *)(
10536 (caddr_t)ip6_out + offset_out);
10540 /* Currently not supported. */
10541 sctp_m_freem(mout);
10545 udp = (struct udphdr *)comp_cp;
10546 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
10547 udp->uh_dport = port;
10548 udp->uh_ulen = htons(sizeof(struct sctp_shutdown_complete_msg) + sizeof(struct udphdr));
10550 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
10551 offset_out += sizeof(struct udphdr);
10552 comp_cp = (struct sctp_shutdown_complete_msg *)((caddr_t)comp_cp + sizeof(struct udphdr));
10554 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
10556 sctp_m_freem(mout);
10559 /* Now copy in and fill in the ABORT tags etc. */
10560 comp_cp->sh.src_port = sh->dest_port;
10561 comp_cp->sh.dest_port = sh->src_port;
10562 comp_cp->sh.checksum = 0;
10563 comp_cp->sh.v_tag = sh->v_tag;
10564 comp_cp->shut_cmp.ch.chunk_flags = SCTP_HAD_NO_TCB;
10565 comp_cp->shut_cmp.ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10566 comp_cp->shut_cmp.ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10568 if (iph_out != NULL) {
10572 mlen = SCTP_BUF_LEN(mout);
10573 bzero(&ro, sizeof ro);
10574 /* set IPv4 length */
10575 iph_out->ip_len = mlen;
10576 #ifdef SCTP_PACKET_LOGGING
10577 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
10578 sctp_packet_log(mout, mlen);
10581 #if defined(SCTP_WITH_NO_CSUM)
10582 SCTP_STAT_INCR(sctps_sendnocrc);
10584 comp_cp->sh.checksum = sctp_calculate_cksum(mout, offset_out);
10585 SCTP_STAT_INCR(sctps_sendswcrc);
10587 SCTP_ENABLE_UDP_CSUM(mout);
10589 #if defined(SCTP_WITH_NO_CSUM)
10590 SCTP_STAT_INCR(sctps_sendnocrc);
10592 mout->m_pkthdr.csum_flags = CSUM_SCTP;
10593 mout->m_pkthdr.csum_data = 0;
10594 SCTP_STAT_INCR(sctps_sendhwcrc);
10597 SCTP_ATTACH_CHAIN(o_pak, mout, mlen);
10599 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
10601 /* Free the route if we got one back */
10606 if (ip6_out != NULL) {
10607 struct route_in6 ro;
10609 struct ifnet *ifp = NULL;
10611 bzero(&ro, sizeof(ro));
10612 mlen = SCTP_BUF_LEN(mout);
10613 #ifdef SCTP_PACKET_LOGGING
10614 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
10615 sctp_packet_log(mout, mlen);
10617 SCTP_ATTACH_CHAIN(o_pak, mout, mlen);
10619 #if defined(SCTP_WITH_NO_CSUM)
10620 SCTP_STAT_INCR(sctps_sendnocrc);
10622 comp_cp->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
10623 SCTP_STAT_INCR(sctps_sendswcrc);
10625 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), mlen - sizeof(struct ip6_hdr))) == 0) {
10626 udp->uh_sum = 0xffff;
10629 #if defined(SCTP_WITH_NO_CSUM)
10630 SCTP_STAT_INCR(sctps_sendnocrc);
10632 mout->m_pkthdr.csum_flags = CSUM_SCTP;
10633 mout->m_pkthdr.csum_data = 0;
10634 SCTP_STAT_INCR(sctps_sendhwcrc);
10637 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
10639 /* Free the route if we got one back */
10644 SCTP_STAT_INCR(sctps_sendpackets);
10645 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
10646 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10651 static struct sctp_nets *
10652 sctp_select_hb_destination(struct sctp_tcb *stcb, struct timeval *now)
10654 struct sctp_nets *net, *hnet;
10655 int ms_goneby, highest_ms, state_overide = 0;
10657 (void)SCTP_GETTIME_TIMEVAL(now);
10660 SCTP_TCB_LOCK_ASSERT(stcb);
10661 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
10663 ((net->dest_state & SCTP_ADDR_NOHB) && ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) ||
10664 (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)
10667 * Skip this guy from consideration if HB is off AND
10672 if (sctp_destination_is_reachable(stcb, (struct sockaddr *)&net->ro._l_addr) == 0) {
10673 /* skip this dest net from consideration */
10676 if (net->last_sent_time.tv_sec) {
10677 /* Sent to so we subtract */
10678 ms_goneby = (now->tv_sec - net->last_sent_time.tv_sec) * 1000;
10680 /* Never been sent to */
10681 ms_goneby = 0x7fffffff;
10683 * When the address state is unconfirmed but still
10684 * considered reachable, we HB at a higher rate. Once it
10685 * goes confirmed OR reaches the "unreachable" state, thenw
10686 * we cut it back to HB at a more normal pace.
10688 if ((net->dest_state & (SCTP_ADDR_UNCONFIRMED | SCTP_ADDR_NOT_REACHABLE)) == SCTP_ADDR_UNCONFIRMED) {
10694 if ((((unsigned int)ms_goneby >= net->RTO) || (state_overide)) &&
10695 (ms_goneby > highest_ms)) {
10696 highest_ms = ms_goneby;
10701 ((hnet->dest_state & (SCTP_ADDR_UNCONFIRMED | SCTP_ADDR_NOT_REACHABLE)) == SCTP_ADDR_UNCONFIRMED)) {
10707 if (hnet && highest_ms && (((unsigned int)highest_ms >= hnet->RTO) || state_overide)) {
10709 * Found the one with longest delay bounds OR it is
10710 * unconfirmed and still not marked unreachable.
10712 SCTPDBG(SCTP_DEBUG_OUTPUT4, "net:%p is the hb winner -", hnet);
10715 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT4,
10716 (struct sockaddr *)&hnet->ro._l_addr);
10718 SCTPDBG(SCTP_DEBUG_OUTPUT4, " none\n");
10721 /* update the timer now */
10722 hnet->last_sent_time = *now;
10725 /* Nothing to HB */
10730 sctp_send_hb(struct sctp_tcb *stcb, int user_req, struct sctp_nets *u_net)
10732 struct sctp_tmit_chunk *chk;
10733 struct sctp_nets *net;
10734 struct sctp_heartbeat_chunk *hb;
10735 struct timeval now;
10736 struct sockaddr_in *sin;
10737 struct sockaddr_in6 *sin6;
10739 SCTP_TCB_LOCK_ASSERT(stcb);
10740 if (user_req == 0) {
10741 net = sctp_select_hb_destination(stcb, &now);
10744 * All our busy none to send to, just start the
10747 if (stcb->asoc.state == 0) {
10750 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT,
10761 (void)SCTP_GETTIME_TIMEVAL(&now);
10763 sin = (struct sockaddr_in *)&net->ro._l_addr;
10764 if (sin->sin_family != AF_INET) {
10765 if (sin->sin_family != AF_INET6) {
10770 sctp_alloc_a_chunk(stcb, chk);
10772 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
10775 chk->copy_by_ref = 0;
10776 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
10777 chk->rec.chunk_id.can_take_data = 1;
10778 chk->asoc = &stcb->asoc;
10779 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
10781 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
10782 if (chk->data == NULL) {
10783 sctp_free_a_chunk(stcb, chk);
10786 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10787 SCTP_BUF_LEN(chk->data) = chk->send_size;
10788 chk->sent = SCTP_DATAGRAM_UNSENT;
10789 chk->snd_count = 0;
10791 atomic_add_int(&chk->whoTo->ref_count, 1);
10792 /* Now we have a mbuf that we can fill in with the details */
10793 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
10794 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
10795 /* fill out chunk header */
10796 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
10797 hb->ch.chunk_flags = 0;
10798 hb->ch.chunk_length = htons(chk->send_size);
10799 /* Fill out hb parameter */
10800 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
10801 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
10802 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
10803 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
10804 /* Did our user request this one, put it in */
10805 hb->heartbeat.hb_info.user_req = user_req;
10806 hb->heartbeat.hb_info.addr_family = sin->sin_family;
10807 hb->heartbeat.hb_info.addr_len = sin->sin_len;
10808 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
10810 * we only take from the entropy pool if the address is not
10813 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
10814 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
10816 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
10817 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
10819 if (sin->sin_family == AF_INET) {
10820 memcpy(hb->heartbeat.hb_info.address, &sin->sin_addr, sizeof(sin->sin_addr));
10821 } else if (sin->sin_family == AF_INET6) {
10822 /* We leave the scope the way it is in our lookup table. */
10823 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
10824 memcpy(hb->heartbeat.hb_info.address, &sin6->sin6_addr, sizeof(sin6->sin6_addr));
10826 /* huh compiler bug */
10831 * JRS 5/14/07 - In CMT PF, the T3 timer is used to track
10832 * PF-heartbeats. Because of this, threshold management is done by
10833 * the t3 timer handler, and does not need to be done upon the send
10834 * of a PF-heartbeat. If CMT PF is on and the destination to which a
10835 * heartbeat is being sent is in PF state, do NOT do threshold
10838 if ((stcb->asoc.sctp_cmt_pf == 0) ||
10839 ((net->dest_state & SCTP_ADDR_PF) != SCTP_ADDR_PF)) {
10840 /* ok we have a destination that needs a beat */
10841 /* lets do the theshold management Qiaobing style */
10842 if (sctp_threshold_management(stcb->sctp_ep, stcb, net,
10843 stcb->asoc.max_send_times)) {
10845 * we have lost the association, in a way this is
10846 * quite bad since we really are one less time since
10847 * we really did not send yet. This is the down side
10848 * to the Q's style as defined in the RFC and not my
10849 * alternate style defined in the RFC.
10851 if (chk->data != NULL) {
10852 sctp_m_freem(chk->data);
10856 * Here we do NOT use the macro since the
10857 * association is now gone.
10860 sctp_free_remote_addr(chk->whoTo);
10863 sctp_free_a_chunk((struct sctp_tcb *)NULL, chk);
10867 net->hb_responded = 0;
10868 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
10869 stcb->asoc.ctrl_queue_cnt++;
10870 SCTP_STAT_INCR(sctps_sendheartbeat);
10872 * Call directly med level routine to put out the chunk. It will
10873 * always tumble out control chunks aka HB but it may even tumble
10880 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
10883 struct sctp_association *asoc;
10884 struct sctp_ecne_chunk *ecne;
10885 struct sctp_tmit_chunk *chk;
10887 asoc = &stcb->asoc;
10888 SCTP_TCB_LOCK_ASSERT(stcb);
10889 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10890 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
10891 /* found a previous ECN_ECHO update it if needed */
10892 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
10893 ecne->tsn = htonl(high_tsn);
10897 /* nope could not find one to update so we must build one */
10898 sctp_alloc_a_chunk(stcb, chk);
10902 chk->copy_by_ref = 0;
10903 SCTP_STAT_INCR(sctps_sendecne);
10904 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
10905 chk->rec.chunk_id.can_take_data = 0;
10906 chk->asoc = &stcb->asoc;
10907 chk->send_size = sizeof(struct sctp_ecne_chunk);
10908 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
10909 if (chk->data == NULL) {
10910 sctp_free_a_chunk(stcb, chk);
10913 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10914 SCTP_BUF_LEN(chk->data) = chk->send_size;
10915 chk->sent = SCTP_DATAGRAM_UNSENT;
10916 chk->snd_count = 0;
10918 atomic_add_int(&chk->whoTo->ref_count, 1);
10919 stcb->asoc.ecn_echo_cnt_onq++;
10920 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
10921 ecne->ch.chunk_type = SCTP_ECN_ECHO;
10922 ecne->ch.chunk_flags = 0;
10923 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
10924 ecne->tsn = htonl(high_tsn);
10925 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
10926 asoc->ctrl_queue_cnt++;
10930 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
10931 struct mbuf *m, int iphlen, int bad_crc)
10933 struct sctp_association *asoc;
10934 struct sctp_pktdrop_chunk *drp;
10935 struct sctp_tmit_chunk *chk;
10942 struct ip6_hdr *ip6h;
10945 int fullsz = 0, extra = 0;
10948 struct sctp_chunkhdr *ch, chunk_buf;
10949 unsigned int chk_length;
10954 asoc = &stcb->asoc;
10955 SCTP_TCB_LOCK_ASSERT(stcb);
10956 if (asoc->peer_supports_pktdrop == 0) {
10958 * peer must declare support before I send one.
10962 if (stcb->sctp_socket == NULL) {
10965 sctp_alloc_a_chunk(stcb, chk);
10969 chk->copy_by_ref = 0;
10970 iph = mtod(m, struct ip *);
10972 sctp_free_a_chunk(stcb, chk);
10975 switch (iph->ip_v) {
10978 len = chk->send_size = iph->ip_len;
10981 case IPV6_VERSION >> 4:
10983 ip6h = mtod(m, struct ip6_hdr *);
10984 len = chk->send_size = htons(ip6h->ip6_plen);
10990 /* Validate that we do not have an ABORT in here. */
10991 offset = iphlen + sizeof(struct sctphdr);
10992 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
10993 sizeof(*ch), (uint8_t *) & chunk_buf);
10994 while (ch != NULL) {
10995 chk_length = ntohs(ch->chunk_length);
10996 if (chk_length < sizeof(*ch)) {
10997 /* break to abort land */
11000 switch (ch->chunk_type) {
11001 case SCTP_PACKET_DROPPED:
11002 case SCTP_ABORT_ASSOCIATION:
11003 case SCTP_INITIATION_ACK:
11005 * We don't respond with an PKT-DROP to an ABORT
11006 * or PKT-DROP. We also do not respond to an
11007 * INIT-ACK, because we can't know if the initiation
11008 * tag is correct or not.
11010 sctp_free_a_chunk(stcb, chk);
11015 offset += SCTP_SIZE32(chk_length);
11016 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11017 sizeof(*ch), (uint8_t *) & chunk_buf);
11020 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11021 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11023 * only send 1 mtu worth, trim off the excess on the end.
11025 fullsz = len - extra;
11026 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11029 chk->asoc = &stcb->asoc;
11030 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11031 if (chk->data == NULL) {
11033 sctp_free_a_chunk(stcb, chk);
11036 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11037 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11039 sctp_m_freem(chk->data);
11043 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11044 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11045 chk->book_size_scale = 0;
11047 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11048 drp->trunc_len = htons(fullsz);
11050 * Len is already adjusted to size minus overhead above take
11051 * out the pkt_drop chunk itself from it.
11053 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11054 len = chk->send_size;
11056 /* no truncation needed */
11057 drp->ch.chunk_flags = 0;
11058 drp->trunc_len = htons(0);
11061 drp->ch.chunk_flags |= SCTP_BADCRC;
11063 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11064 SCTP_BUF_LEN(chk->data) = chk->send_size;
11065 chk->sent = SCTP_DATAGRAM_UNSENT;
11066 chk->snd_count = 0;
11068 /* we should hit here */
11071 chk->whoTo = asoc->primary_destination;
11073 atomic_add_int(&chk->whoTo->ref_count, 1);
11074 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11075 chk->rec.chunk_id.can_take_data = 1;
11076 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11077 drp->ch.chunk_length = htons(chk->send_size);
11078 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11082 drp->bottle_bw = htonl(spc);
11083 if (asoc->my_rwnd) {
11084 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11085 asoc->size_on_all_streams +
11086 asoc->my_rwnd_control_len +
11087 stcb->sctp_socket->so_rcv.sb_cc);
11090 * If my rwnd is 0, possibly from mbuf depletion as well as
11091 * space used, tell the peer there is NO space aka onq == bw
11093 drp->current_onq = htonl(spc);
11097 m_copydata(m, iphlen, len, (caddr_t)datap);
11098 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11099 asoc->ctrl_queue_cnt++;
11103 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn)
11105 struct sctp_association *asoc;
11106 struct sctp_cwr_chunk *cwr;
11107 struct sctp_tmit_chunk *chk;
11109 asoc = &stcb->asoc;
11110 SCTP_TCB_LOCK_ASSERT(stcb);
11111 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11112 if (chk->rec.chunk_id.id == SCTP_ECN_CWR) {
11113 /* found a previous ECN_CWR update it if needed */
11114 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11115 if (compare_with_wrap(high_tsn, ntohl(cwr->tsn),
11117 cwr->tsn = htonl(high_tsn);
11122 /* nope could not find one to update so we must build one */
11123 sctp_alloc_a_chunk(stcb, chk);
11127 chk->copy_by_ref = 0;
11128 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11129 chk->rec.chunk_id.can_take_data = 1;
11130 chk->asoc = &stcb->asoc;
11131 chk->send_size = sizeof(struct sctp_cwr_chunk);
11132 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11133 if (chk->data == NULL) {
11134 sctp_free_a_chunk(stcb, chk);
11137 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11138 SCTP_BUF_LEN(chk->data) = chk->send_size;
11139 chk->sent = SCTP_DATAGRAM_UNSENT;
11140 chk->snd_count = 0;
11142 atomic_add_int(&chk->whoTo->ref_count, 1);
11143 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11144 cwr->ch.chunk_type = SCTP_ECN_CWR;
11145 cwr->ch.chunk_flags = 0;
11146 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11147 cwr->tsn = htonl(high_tsn);
11148 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11149 asoc->ctrl_queue_cnt++;
11153 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11154 int number_entries, uint16_t * list,
11155 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11157 int len, old_len, i;
11158 struct sctp_stream_reset_out_request *req_out;
11159 struct sctp_chunkhdr *ch;
11161 ch = mtod(chk->data, struct sctp_chunkhdr *);
11164 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11166 /* get to new offset for the param. */
11167 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11168 /* now how long will this param be? */
11169 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11170 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11171 req_out->ph.param_length = htons(len);
11172 req_out->request_seq = htonl(seq);
11173 req_out->response_seq = htonl(resp_seq);
11174 req_out->send_reset_at_tsn = htonl(last_sent);
11175 if (number_entries) {
11176 for (i = 0; i < number_entries; i++) {
11177 req_out->list_of_streams[i] = htons(list[i]);
11180 if (SCTP_SIZE32(len) > len) {
11182 * Need to worry about the pad we may end up adding to the
11183 * end. This is easy since the struct is either aligned to 4
11184 * bytes or 2 bytes off.
11186 req_out->list_of_streams[number_entries] = 0;
11188 /* now fix the chunk length */
11189 ch->chunk_length = htons(len + old_len);
11190 chk->book_size = len + old_len;
11191 chk->book_size_scale = 0;
11192 chk->send_size = SCTP_SIZE32(chk->book_size);
11193 SCTP_BUF_LEN(chk->data) = chk->send_size;
11199 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11200 int number_entries, uint16_t * list,
11203 int len, old_len, i;
11204 struct sctp_stream_reset_in_request *req_in;
11205 struct sctp_chunkhdr *ch;
11207 ch = mtod(chk->data, struct sctp_chunkhdr *);
11210 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11212 /* get to new offset for the param. */
11213 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11214 /* now how long will this param be? */
11215 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11216 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11217 req_in->ph.param_length = htons(len);
11218 req_in->request_seq = htonl(seq);
11219 if (number_entries) {
11220 for (i = 0; i < number_entries; i++) {
11221 req_in->list_of_streams[i] = htons(list[i]);
11224 if (SCTP_SIZE32(len) > len) {
11226 * Need to worry about the pad we may end up adding to the
11227 * end. This is easy since the struct is either aligned to 4
11228 * bytes or 2 bytes off.
11230 req_in->list_of_streams[number_entries] = 0;
11232 /* now fix the chunk length */
11233 ch->chunk_length = htons(len + old_len);
11234 chk->book_size = len + old_len;
11235 chk->book_size_scale = 0;
11236 chk->send_size = SCTP_SIZE32(chk->book_size);
11237 SCTP_BUF_LEN(chk->data) = chk->send_size;
11243 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11247 struct sctp_stream_reset_tsn_request *req_tsn;
11248 struct sctp_chunkhdr *ch;
11250 ch = mtod(chk->data, struct sctp_chunkhdr *);
11253 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11255 /* get to new offset for the param. */
11256 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11257 /* now how long will this param be? */
11258 len = sizeof(struct sctp_stream_reset_tsn_request);
11259 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11260 req_tsn->ph.param_length = htons(len);
11261 req_tsn->request_seq = htonl(seq);
11263 /* now fix the chunk length */
11264 ch->chunk_length = htons(len + old_len);
11265 chk->send_size = len + old_len;
11266 chk->book_size = SCTP_SIZE32(chk->send_size);
11267 chk->book_size_scale = 0;
11268 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11273 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11274 uint32_t resp_seq, uint32_t result)
11277 struct sctp_stream_reset_response *resp;
11278 struct sctp_chunkhdr *ch;
11280 ch = mtod(chk->data, struct sctp_chunkhdr *);
11283 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11285 /* get to new offset for the param. */
11286 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11287 /* now how long will this param be? */
11288 len = sizeof(struct sctp_stream_reset_response);
11289 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11290 resp->ph.param_length = htons(len);
11291 resp->response_seq = htonl(resp_seq);
11292 resp->result = ntohl(result);
11294 /* now fix the chunk length */
11295 ch->chunk_length = htons(len + old_len);
11296 chk->book_size = len + old_len;
11297 chk->book_size_scale = 0;
11298 chk->send_size = SCTP_SIZE32(chk->book_size);
11299 SCTP_BUF_LEN(chk->data) = chk->send_size;
11306 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11307 uint32_t resp_seq, uint32_t result,
11308 uint32_t send_una, uint32_t recv_next)
11311 struct sctp_stream_reset_response_tsn *resp;
11312 struct sctp_chunkhdr *ch;
11314 ch = mtod(chk->data, struct sctp_chunkhdr *);
11317 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11319 /* get to new offset for the param. */
11320 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11321 /* now how long will this param be? */
11322 len = sizeof(struct sctp_stream_reset_response_tsn);
11323 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11324 resp->ph.param_length = htons(len);
11325 resp->response_seq = htonl(resp_seq);
11326 resp->result = htonl(result);
11327 resp->senders_next_tsn = htonl(send_una);
11328 resp->receivers_next_tsn = htonl(recv_next);
11330 /* now fix the chunk length */
11331 ch->chunk_length = htons(len + old_len);
11332 chk->book_size = len + old_len;
11333 chk->send_size = SCTP_SIZE32(chk->book_size);
11334 chk->book_size_scale = 0;
11335 SCTP_BUF_LEN(chk->data) = chk->send_size;
11340 sctp_add_a_stream(struct sctp_tmit_chunk *chk,
11345 struct sctp_chunkhdr *ch;
11346 struct sctp_stream_reset_add_strm *addstr;
11348 ch = mtod(chk->data, struct sctp_chunkhdr *);
11349 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11351 /* get to new offset for the param. */
11352 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11353 /* now how long will this param be? */
11354 len = sizeof(struct sctp_stream_reset_add_strm);
11357 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_STREAMS);
11358 addstr->ph.param_length = htons(len);
11359 addstr->request_seq = htonl(seq);
11360 addstr->number_of_streams = htons(adding);
11361 addstr->reserved = 0;
11363 /* now fix the chunk length */
11364 ch->chunk_length = htons(len + old_len);
11365 chk->send_size = len + old_len;
11366 chk->book_size = SCTP_SIZE32(chk->send_size);
11367 chk->book_size_scale = 0;
11368 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11373 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11374 int number_entries, uint16_t * list,
11375 uint8_t send_out_req,
11377 uint8_t send_in_req,
11378 uint8_t send_tsn_req,
11379 uint8_t add_stream,
11384 struct sctp_association *asoc;
11385 struct sctp_tmit_chunk *chk;
11386 struct sctp_chunkhdr *ch;
11389 asoc = &stcb->asoc;
11390 if (asoc->stream_reset_outstanding) {
11392 * Already one pending, must get ACK back to clear the flag.
11394 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11397 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11398 (add_stream == 0)) {
11399 /* nothing to do */
11400 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11403 if (send_tsn_req && (send_out_req || send_in_req)) {
11404 /* error, can't do that */
11405 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11408 sctp_alloc_a_chunk(stcb, chk);
11410 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11413 chk->copy_by_ref = 0;
11414 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11415 chk->rec.chunk_id.can_take_data = 0;
11416 chk->asoc = &stcb->asoc;
11417 chk->book_size = sizeof(struct sctp_chunkhdr);
11418 chk->send_size = SCTP_SIZE32(chk->book_size);
11419 chk->book_size_scale = 0;
11421 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11422 if (chk->data == NULL) {
11423 sctp_free_a_chunk(stcb, chk);
11424 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11427 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11429 /* setup chunk parameters */
11430 chk->sent = SCTP_DATAGRAM_UNSENT;
11431 chk->snd_count = 0;
11432 chk->whoTo = asoc->primary_destination;
11433 atomic_add_int(&chk->whoTo->ref_count, 1);
11435 ch = mtod(chk->data, struct sctp_chunkhdr *);
11436 ch->chunk_type = SCTP_STREAM_RESET;
11437 ch->chunk_flags = 0;
11438 ch->chunk_length = htons(chk->book_size);
11439 SCTP_BUF_LEN(chk->data) = chk->send_size;
11441 seq = stcb->asoc.str_reset_seq_out;
11442 if (send_out_req) {
11443 sctp_add_stream_reset_out(chk, number_entries, list,
11444 seq, resp_seq, (stcb->asoc.sending_seq - 1));
11445 asoc->stream_reset_out_is_outstanding = 1;
11447 asoc->stream_reset_outstanding++;
11450 sctp_add_a_stream(chk, seq, adding);
11452 asoc->stream_reset_outstanding++;
11455 sctp_add_stream_reset_in(chk, number_entries, list, seq);
11456 asoc->stream_reset_outstanding++;
11458 if (send_tsn_req) {
11459 sctp_add_stream_reset_tsn(chk, seq);
11460 asoc->stream_reset_outstanding++;
11462 asoc->str_reset = chk;
11464 /* insert the chunk for sending */
11465 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11468 asoc->ctrl_queue_cnt++;
11469 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11474 sctp_send_abort(struct mbuf *m, int iphlen, struct sctphdr *sh, uint32_t vtag,
11475 struct mbuf *err_cause, uint32_t vrf_id, uint16_t port)
11478 * Formulate the abort message, and send it back down.
11480 struct mbuf *o_pak;
11482 struct sctp_abort_msg *abm;
11483 struct ip *iph, *iph_out;
11484 struct udphdr *udp;
11487 struct ip6_hdr *ip6, *ip6_out;
11490 int iphlen_out, len;
11492 /* don't respond to ABORT with ABORT */
11493 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
11495 sctp_m_freem(err_cause);
11498 iph = mtod(m, struct ip *);
11499 switch (iph->ip_v) {
11501 len = (sizeof(struct ip) + sizeof(struct sctp_abort_msg));
11504 case IPV6_VERSION >> 4:
11505 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_abort_msg));
11510 sctp_m_freem(err_cause);
11515 len += sizeof(struct udphdr);
11517 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
11518 if (mout == NULL) {
11520 sctp_m_freem(err_cause);
11524 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11525 SCTP_BUF_LEN(mout) = len;
11526 SCTP_BUF_NEXT(mout) = err_cause;
11531 switch (iph->ip_v) {
11533 iph_out = mtod(mout, struct ip *);
11535 /* Fill in the IP header for the ABORT */
11536 iph_out->ip_v = IPVERSION;
11537 iph_out->ip_hl = (sizeof(struct ip) / 4);
11538 iph_out->ip_tos = (u_char)0;
11539 iph_out->ip_id = 0;
11540 iph_out->ip_off = 0;
11541 iph_out->ip_ttl = MAXTTL;
11543 iph_out->ip_p = IPPROTO_UDP;
11545 iph_out->ip_p = IPPROTO_SCTP;
11547 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
11548 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
11549 /* let IP layer calculate this */
11550 iph_out->ip_sum = 0;
11552 iphlen_out = sizeof(*iph_out);
11553 abm = (struct sctp_abort_msg *)((caddr_t)iph_out + iphlen_out);
11556 case IPV6_VERSION >> 4:
11557 ip6 = (struct ip6_hdr *)iph;
11558 ip6_out = mtod(mout, struct ip6_hdr *);
11560 /* Fill in the IP6 header for the ABORT */
11561 ip6_out->ip6_flow = ip6->ip6_flow;
11562 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11564 ip6_out->ip6_nxt = IPPROTO_UDP;
11566 ip6_out->ip6_nxt = IPPROTO_SCTP;
11568 ip6_out->ip6_src = ip6->ip6_dst;
11569 ip6_out->ip6_dst = ip6->ip6_src;
11571 iphlen_out = sizeof(*ip6_out);
11572 abm = (struct sctp_abort_msg *)((caddr_t)ip6_out + iphlen_out);
11576 /* Currently not supported */
11577 sctp_m_freem(mout);
11581 udp = (struct udphdr *)abm;
11583 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11584 udp->uh_dport = port;
11585 /* set udp->uh_ulen later */
11587 iphlen_out += sizeof(struct udphdr);
11588 abm = (struct sctp_abort_msg *)((caddr_t)abm + sizeof(struct udphdr));
11590 abm->sh.src_port = sh->dest_port;
11591 abm->sh.dest_port = sh->src_port;
11592 abm->sh.checksum = 0;
11594 abm->sh.v_tag = sh->v_tag;
11595 abm->msg.ch.chunk_flags = SCTP_HAD_NO_TCB;
11597 abm->sh.v_tag = htonl(vtag);
11598 abm->msg.ch.chunk_flags = 0;
11600 abm->msg.ch.chunk_type = SCTP_ABORT_ASSOCIATION;
11603 struct mbuf *m_tmp = err_cause;
11606 /* get length of the err_cause chain */
11607 while (m_tmp != NULL) {
11608 err_len += SCTP_BUF_LEN(m_tmp);
11609 m_tmp = SCTP_BUF_NEXT(m_tmp);
11611 len = SCTP_BUF_LEN(mout) + err_len;
11613 /* need pad at end of chunk */
11614 uint32_t cpthis = 0;
11617 padlen = 4 - (len % 4);
11618 m_copyback(mout, len, padlen, (caddr_t)&cpthis);
11621 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch) + err_len);
11623 len = SCTP_BUF_LEN(mout);
11624 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch));
11627 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11629 sctp_m_freem(mout);
11632 if (iph_out != NULL) {
11636 /* zap the stack pointer to the route */
11637 bzero(&ro, sizeof ro);
11639 udp->uh_ulen = htons(len - sizeof(struct ip));
11640 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11642 SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip_output:\n");
11643 SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, iph_out, &abm->sh);
11644 /* set IPv4 length */
11645 iph_out->ip_len = len;
11647 #ifdef SCTP_PACKET_LOGGING
11648 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11649 sctp_packet_log(mout, len);
11651 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11653 #if defined(SCTP_WITH_NO_CSUM)
11654 SCTP_STAT_INCR(sctps_sendnocrc);
11656 abm->sh.checksum = sctp_calculate_cksum(mout, iphlen_out);
11657 SCTP_STAT_INCR(sctps_sendswcrc);
11659 SCTP_ENABLE_UDP_CSUM(o_pak);
11661 #if defined(SCTP_WITH_NO_CSUM)
11662 SCTP_STAT_INCR(sctps_sendnocrc);
11664 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11665 mout->m_pkthdr.csum_data = 0;
11666 SCTP_STAT_INCR(sctps_sendhwcrc);
11669 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
11671 /* Free the route if we got one back */
11676 if (ip6_out != NULL) {
11677 struct route_in6 ro;
11679 struct ifnet *ifp = NULL;
11681 /* zap the stack pointer to the route */
11682 bzero(&ro, sizeof(ro));
11684 udp->uh_ulen = htons(len - sizeof(struct ip6_hdr));
11686 SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip6_output:\n");
11687 SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, (struct ip *)ip6_out, &abm->sh);
11688 ip6_out->ip6_plen = len - sizeof(*ip6_out);
11689 #ifdef SCTP_PACKET_LOGGING
11690 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11691 sctp_packet_log(mout, len);
11693 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11695 #if defined(SCTP_WITH_NO_CSUM)
11696 SCTP_STAT_INCR(sctps_sendnocrc);
11698 abm->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11699 SCTP_STAT_INCR(sctps_sendswcrc);
11701 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11702 udp->uh_sum = 0xffff;
11705 #if defined(SCTP_WITH_NO_CSUM)
11706 SCTP_STAT_INCR(sctps_sendnocrc);
11708 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11709 mout->m_pkthdr.csum_data = 0;
11710 SCTP_STAT_INCR(sctps_sendhwcrc);
11713 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
11715 /* Free the route if we got one back */
11720 SCTP_STAT_INCR(sctps_sendpackets);
11721 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11722 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11726 sctp_send_operr_to(struct mbuf *m, int iphlen, struct mbuf *scm, uint32_t vtag,
11727 uint32_t vrf_id, uint16_t port)
11729 struct mbuf *o_pak;
11730 struct sctphdr *sh, *sh_out;
11731 struct sctp_chunkhdr *ch;
11732 struct ip *iph, *iph_out;
11733 struct udphdr *udp = NULL;
11737 struct ip6_hdr *ip6, *ip6_out;
11740 int iphlen_out, len;
11742 iph = mtod(m, struct ip *);
11743 sh = (struct sctphdr *)((caddr_t)iph + iphlen);
11744 switch (iph->ip_v) {
11746 len = (sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr));
11749 case IPV6_VERSION >> 4:
11750 len = (sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr));
11760 len += sizeof(struct udphdr);
11762 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
11763 if (mout == NULL) {
11769 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11770 SCTP_BUF_LEN(mout) = len;
11771 SCTP_BUF_NEXT(mout) = scm;
11776 switch (iph->ip_v) {
11778 iph_out = mtod(mout, struct ip *);
11780 /* Fill in the IP header for the ABORT */
11781 iph_out->ip_v = IPVERSION;
11782 iph_out->ip_hl = (sizeof(struct ip) / 4);
11783 iph_out->ip_tos = (u_char)0;
11784 iph_out->ip_id = 0;
11785 iph_out->ip_off = 0;
11786 iph_out->ip_ttl = MAXTTL;
11788 iph_out->ip_p = IPPROTO_UDP;
11790 iph_out->ip_p = IPPROTO_SCTP;
11792 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
11793 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
11794 /* let IP layer calculate this */
11795 iph_out->ip_sum = 0;
11797 iphlen_out = sizeof(struct ip);
11798 sh_out = (struct sctphdr *)((caddr_t)iph_out + iphlen_out);
11801 case IPV6_VERSION >> 4:
11802 ip6 = (struct ip6_hdr *)iph;
11803 ip6_out = mtod(mout, struct ip6_hdr *);
11805 /* Fill in the IP6 header for the ABORT */
11806 ip6_out->ip6_flow = ip6->ip6_flow;
11807 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11809 ip6_out->ip6_nxt = IPPROTO_UDP;
11811 ip6_out->ip6_nxt = IPPROTO_SCTP;
11813 ip6_out->ip6_src = ip6->ip6_dst;
11814 ip6_out->ip6_dst = ip6->ip6_src;
11816 iphlen_out = sizeof(struct ip6_hdr);
11817 sh_out = (struct sctphdr *)((caddr_t)ip6_out + iphlen_out);
11821 /* Currently not supported */
11822 sctp_m_freem(mout);
11826 udp = (struct udphdr *)sh_out;
11828 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11829 udp->uh_dport = port;
11830 /* set udp->uh_ulen later */
11832 iphlen_out += sizeof(struct udphdr);
11833 sh_out = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
11835 sh_out->src_port = sh->dest_port;
11836 sh_out->dest_port = sh->src_port;
11837 sh_out->v_tag = vtag;
11838 sh_out->checksum = 0;
11840 ch = (struct sctp_chunkhdr *)((caddr_t)sh_out + sizeof(struct sctphdr));
11841 ch->chunk_type = SCTP_OPERATION_ERROR;
11842 ch->chunk_flags = 0;
11845 struct mbuf *m_tmp = scm;
11848 /* get length of the err_cause chain */
11849 while (m_tmp != NULL) {
11850 cause_len += SCTP_BUF_LEN(m_tmp);
11851 m_tmp = SCTP_BUF_NEXT(m_tmp);
11853 len = SCTP_BUF_LEN(mout) + cause_len;
11854 if (cause_len % 4) {
11855 /* need pad at end of chunk */
11856 uint32_t cpthis = 0;
11859 padlen = 4 - (len % 4);
11860 m_copyback(mout, len, padlen, (caddr_t)&cpthis);
11863 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
11865 len = SCTP_BUF_LEN(mout);
11866 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr));
11869 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11871 sctp_m_freem(mout);
11874 if (iph_out != NULL) {
11878 /* zap the stack pointer to the route */
11879 bzero(&ro, sizeof ro);
11881 udp->uh_ulen = htons(len - sizeof(struct ip));
11882 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11884 /* set IPv4 length */
11885 iph_out->ip_len = len;
11887 #ifdef SCTP_PACKET_LOGGING
11888 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11889 sctp_packet_log(mout, len);
11891 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11893 #if defined(SCTP_WITH_NO_CSUM)
11894 SCTP_STAT_INCR(sctps_sendnocrc);
11896 sh_out->checksum = sctp_calculate_cksum(mout, iphlen_out);
11897 SCTP_STAT_INCR(sctps_sendswcrc);
11899 SCTP_ENABLE_UDP_CSUM(o_pak);
11901 #if defined(SCTP_WITH_NO_CSUM)
11902 SCTP_STAT_INCR(sctps_sendnocrc);
11904 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11905 mout->m_pkthdr.csum_data = 0;
11906 SCTP_STAT_INCR(sctps_sendhwcrc);
11909 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
11911 /* Free the route if we got one back */
11916 if (ip6_out != NULL) {
11917 struct route_in6 ro;
11919 struct ifnet *ifp = NULL;
11921 /* zap the stack pointer to the route */
11922 bzero(&ro, sizeof(ro));
11924 udp->uh_ulen = htons(len - sizeof(struct ip6_hdr));
11926 ip6_out->ip6_plen = len - sizeof(*ip6_out);
11927 #ifdef SCTP_PACKET_LOGGING
11928 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11929 sctp_packet_log(mout, len);
11931 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11933 #if defined(SCTP_WITH_NO_CSUM)
11934 SCTP_STAT_INCR(sctps_sendnocrc);
11936 sh_out->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11937 SCTP_STAT_INCR(sctps_sendswcrc);
11939 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11940 udp->uh_sum = 0xffff;
11943 #if defined(SCTP_WITH_NO_CSUM)
11944 SCTP_STAT_INCR(sctps_sendnocrc);
11946 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11947 mout->m_pkthdr.csum_data = 0;
11948 SCTP_STAT_INCR(sctps_sendhwcrc);
11951 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
11953 /* Free the route if we got one back */
11958 SCTP_STAT_INCR(sctps_sendpackets);
11959 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11960 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11963 static struct mbuf *
11964 sctp_copy_resume(struct sctp_stream_queue_pending *sp,
11966 struct sctp_sndrcvinfo *srcv,
11968 int user_marks_eor,
11971 struct mbuf **new_tail)
11975 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
11976 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
11978 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11981 *sndout = m_length(m, NULL);
11982 *new_tail = m_last(m);
11988 sctp_copy_one(struct sctp_stream_queue_pending *sp,
11995 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
11997 if (sp->data == NULL) {
11998 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12001 sp->tail_mbuf = m_last(sp->data);
12007 static struct sctp_stream_queue_pending *
12008 sctp_copy_it_in(struct sctp_tcb *stcb,
12009 struct sctp_association *asoc,
12010 struct sctp_sndrcvinfo *srcv,
12012 struct sctp_nets *net,
12014 int user_marks_eor,
12019 * This routine must be very careful in its work. Protocol
12020 * processing is up and running so care must be taken to spl...()
12021 * when you need to do something that may effect the stcb/asoc. The
12022 * sb is locked however. When data is copied the protocol processing
12023 * should be enabled since this is a slower operation...
12025 struct sctp_stream_queue_pending *sp = NULL;
12029 /* Now can we send this? */
12030 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12031 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12032 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12033 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12034 /* got data while shutting down */
12035 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12036 *error = ECONNRESET;
12039 sctp_alloc_a_strmoq(stcb, sp);
12041 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12046 sp->sender_all_done = 0;
12047 sp->sinfo_flags = srcv->sinfo_flags;
12048 sp->timetolive = srcv->sinfo_timetolive;
12049 sp->ppid = srcv->sinfo_ppid;
12050 sp->context = srcv->sinfo_context;
12052 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12054 sp->stream = srcv->sinfo_stream;
12055 sp->length = min(uio->uio_resid, max_send_len);
12056 if ((sp->length == (uint32_t) uio->uio_resid) &&
12057 ((user_marks_eor == 0) ||
12058 (srcv->sinfo_flags & SCTP_EOF) ||
12059 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12060 sp->msg_is_complete = 1;
12062 sp->msg_is_complete = 0;
12064 sp->sender_all_done = 0;
12065 sp->some_taken = 0;
12066 sp->put_last_out = 0;
12067 resv_in_first = sizeof(struct sctp_data_chunk);
12068 sp->data = sp->tail_mbuf = NULL;
12069 if (sp->length == 0) {
12073 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12074 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12075 sctp_auth_key_acquire(stcb, stcb->asoc.authinfo.active_keyid);
12076 sp->holds_key_ref = 1;
12078 *error = sctp_copy_one(sp, uio, resv_in_first);
12081 sctp_free_a_strmoq(stcb, sp);
12084 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12086 atomic_add_int(&sp->net->ref_count, 1);
12090 sctp_set_prsctp_policy(sp);
12098 sctp_sosend(struct socket *so,
12099 struct sockaddr *addr,
12102 struct mbuf *control,
12107 int error, use_rcvinfo = 0;
12108 struct sctp_sndrcvinfo srcv;
12109 struct sockaddr *addr_to_use;
12111 #if defined(INET) && defined(INET6)
12112 struct sockaddr_in sin;
12117 /* process cmsg snd/rcv info (maybe a assoc-id) */
12118 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&srcv, control,
12124 addr_to_use = addr;
12125 #if defined(INET) && defined(INET6)
12126 if ((addr) && (addr->sa_family == AF_INET6)) {
12127 struct sockaddr_in6 *sin6;
12129 sin6 = (struct sockaddr_in6 *)addr;
12130 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12131 in6_sin6_2_sin(&sin, sin6);
12132 addr_to_use = (struct sockaddr *)&sin;
12136 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12139 use_rcvinfo ? &srcv : NULL
12147 sctp_lower_sosend(struct socket *so,
12148 struct sockaddr *addr,
12150 struct mbuf *i_pak,
12151 struct mbuf *control,
12153 struct sctp_sndrcvinfo *srcv
12158 unsigned int sndlen = 0, max_len;
12160 struct mbuf *top = NULL;
12161 int queue_only = 0, queue_only_for_init = 0;
12162 int free_cnt_applied = 0;
12164 int now_filled = 0;
12165 unsigned int inqueue_bytes = 0;
12166 struct sctp_block_entry be;
12167 struct sctp_inpcb *inp;
12168 struct sctp_tcb *stcb = NULL;
12169 struct timeval now;
12170 struct sctp_nets *net;
12171 struct sctp_association *asoc;
12172 struct sctp_inpcb *t_inp;
12173 int user_marks_eor;
12174 int create_lock_applied = 0;
12175 int nagle_applies = 0;
12176 int some_on_control = 0;
12177 int got_all_of_the_send = 0;
12178 int hold_tcblock = 0;
12179 int non_blocking = 0;
12180 uint32_t local_add_more, local_soresv = 0;
12182 uint16_t sinfo_flags;
12183 sctp_assoc_t sinfo_assoc_id;
12190 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12192 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12195 SCTP_RELEASE_PKT(i_pak);
12199 if ((uio == NULL) && (i_pak == NULL)) {
12200 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12203 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12204 atomic_add_int(&inp->total_sends, 1);
12206 if (uio->uio_resid < 0) {
12207 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12210 sndlen = uio->uio_resid;
12212 top = SCTP_HEADER_TO_CHAIN(i_pak);
12213 sndlen = SCTP_HEADER_LEN(i_pak);
12215 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12218 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12219 (inp->sctp_socket->so_qlimit)) {
12220 /* The listener can NOT send */
12221 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12226 * Pre-screen address, if one is given the sin-len
12227 * must be set correctly!
12230 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12232 switch (raddr->sa.sa_family) {
12235 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12236 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12240 port = raddr->sin.sin_port;
12245 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12246 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12250 port = raddr->sin6.sin6_port;
12254 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12255 error = EAFNOSUPPORT;
12262 sinfo_flags = srcv->sinfo_flags;
12263 sinfo_assoc_id = srcv->sinfo_assoc_id;
12264 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12265 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12266 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12270 if (srcv->sinfo_flags)
12271 SCTP_STAT_INCR(sctps_sends_with_flags);
12273 sinfo_flags = inp->def_send.sinfo_flags;
12274 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12276 if (sinfo_flags & SCTP_SENDALL) {
12277 /* its a sendall */
12278 error = sctp_sendall(inp, uio, top, srcv);
12282 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12283 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12287 /* now we must find the assoc */
12288 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12289 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12290 SCTP_INP_RLOCK(inp);
12291 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12292 if (stcb == NULL) {
12293 SCTP_INP_RUNLOCK(inp);
12294 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12298 SCTP_TCB_LOCK(stcb);
12300 SCTP_INP_RUNLOCK(inp);
12301 } else if (sinfo_assoc_id) {
12302 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12305 * Since we did not use findep we must
12306 * increment it, and if we don't find a tcb
12309 SCTP_INP_WLOCK(inp);
12310 SCTP_INP_INCR_REF(inp);
12311 SCTP_INP_WUNLOCK(inp);
12312 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12313 if (stcb == NULL) {
12314 SCTP_INP_WLOCK(inp);
12315 SCTP_INP_DECR_REF(inp);
12316 SCTP_INP_WUNLOCK(inp);
12321 if ((stcb == NULL) && (addr)) {
12322 /* Possible implicit send? */
12323 SCTP_ASOC_CREATE_LOCK(inp);
12324 create_lock_applied = 1;
12325 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12326 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12327 /* Should I really unlock ? */
12328 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12333 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12334 (addr->sa_family == AF_INET6)) {
12335 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12339 SCTP_INP_WLOCK(inp);
12340 SCTP_INP_INCR_REF(inp);
12341 SCTP_INP_WUNLOCK(inp);
12342 /* With the lock applied look again */
12343 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12344 if (stcb == NULL) {
12345 SCTP_INP_WLOCK(inp);
12346 SCTP_INP_DECR_REF(inp);
12347 SCTP_INP_WUNLOCK(inp);
12351 if (t_inp != inp) {
12352 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12357 if (stcb == NULL) {
12358 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
12359 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12360 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12364 if (addr == NULL) {
12365 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12370 * UDP style, we must go ahead and start the INIT
12375 if ((sinfo_flags & SCTP_ABORT) ||
12376 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12378 * User asks to abort a non-existant assoc,
12379 * or EOF a non-existant assoc with no data
12381 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12385 /* get an asoc/stcb struct */
12386 vrf_id = inp->def_vrf_id;
12388 if (create_lock_applied == 0) {
12389 panic("Error, should hold create lock and I don't?");
12392 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12395 if (stcb == NULL) {
12396 /* Error is setup for us in the call */
12399 if (create_lock_applied) {
12400 SCTP_ASOC_CREATE_UNLOCK(inp);
12401 create_lock_applied = 0;
12403 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12406 * Turn on queue only flag to prevent data from
12410 asoc = &stcb->asoc;
12411 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12412 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12414 /* initialize authentication params for the assoc */
12415 sctp_initialize_auth_params(inp, stcb);
12419 * see if a init structure exists in cmsg
12422 struct sctp_initmsg initm;
12425 if (sctp_find_cmsg(SCTP_INIT, (void *)&initm, control,
12428 * we have an INIT override of the
12431 if (initm.sinit_max_attempts)
12432 asoc->max_init_times = initm.sinit_max_attempts;
12433 if (initm.sinit_num_ostreams)
12434 asoc->pre_open_streams = initm.sinit_num_ostreams;
12435 if (initm.sinit_max_instreams)
12436 asoc->max_inbound_streams = initm.sinit_max_instreams;
12437 if (initm.sinit_max_init_timeo)
12438 asoc->initial_init_rto_max = initm.sinit_max_init_timeo;
12439 if (asoc->streamoutcnt < asoc->pre_open_streams) {
12440 struct sctp_stream_out *tmp_str;
12443 /* Default is NOT correct */
12444 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, defout:%d pre_open:%d\n",
12445 asoc->streamoutcnt, asoc->pre_open_streams);
12447 * What happens if this
12448 * fails? we panic ...
12451 if (hold_tcblock) {
12453 SCTP_TCB_UNLOCK(stcb);
12455 SCTP_MALLOC(tmp_str,
12456 struct sctp_stream_out *,
12457 (asoc->pre_open_streams *
12458 sizeof(struct sctp_stream_out)),
12461 SCTP_TCB_LOCK(stcb);
12463 if (tmp_str != NULL) {
12464 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
12465 asoc->strmout = tmp_str;
12466 asoc->strm_realoutsize = asoc->streamoutcnt = asoc->pre_open_streams;
12468 asoc->pre_open_streams = asoc->streamoutcnt;
12470 for (i = 0; i < asoc->streamoutcnt; i++) {
12472 * inbound side must be set
12473 * to 0xffff, also NOTE when
12474 * we get the INIT-ACK back
12475 * (for INIT sender) we MUST
12477 * (streamoutcnt) but first
12478 * check if we sent to any
12479 * of the upper streams that
12480 * were dropped (if some
12481 * were). Those that were
12482 * dropped must be notified
12483 * to the upper layer as
12486 asoc->strmout[i].next_sequence_sent = 0x0;
12487 TAILQ_INIT(&asoc->strmout[i].outqueue);
12488 asoc->strmout[i].stream_no = i;
12489 asoc->strmout[i].last_msg_incomplete = 0;
12490 asoc->strmout[i].next_spoke.tqe_next = 0;
12491 asoc->strmout[i].next_spoke.tqe_prev = 0;
12497 /* out with the INIT */
12498 queue_only_for_init = 1;
12500 * we may want to dig in after this call and adjust the MTU
12501 * value. It defaulted to 1500 (constant) but the ro
12502 * structure may now have an update and thus we may need to
12503 * change it BEFORE we append the message.
12507 asoc = &stcb->asoc;
12509 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12510 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12512 net = sctp_findnet(stcb, addr);
12515 if ((net == NULL) ||
12516 ((port != 0) && (port != stcb->rport))) {
12517 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12522 net = stcb->asoc.primary_destination;
12524 atomic_add_int(&stcb->total_sends, 1);
12525 /* Keep the stcb from being freed under our feet */
12526 atomic_add_int(&asoc->refcnt, 1);
12527 free_cnt_applied = 1;
12529 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12530 if (sndlen > asoc->smallest_mtu) {
12531 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12536 if ((SCTP_SO_IS_NBIO(so)
12537 || (flags & MSG_NBIO)
12541 /* would we block? */
12542 if (non_blocking) {
12543 if (hold_tcblock == 0) {
12544 SCTP_TCB_LOCK(stcb);
12547 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12548 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12549 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12550 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12551 if (sndlen > SCTP_SB_LIMIT_SND(so))
12554 error = EWOULDBLOCK;
12557 stcb->asoc.sb_send_resv += sndlen;
12558 SCTP_TCB_UNLOCK(stcb);
12561 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12563 local_soresv = sndlen;
12564 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12565 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12566 error = ECONNRESET;
12569 if (create_lock_applied) {
12570 SCTP_ASOC_CREATE_UNLOCK(inp);
12571 create_lock_applied = 0;
12573 if (asoc->stream_reset_outstanding) {
12575 * Can't queue any data while stream reset is underway.
12577 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
12581 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12582 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12585 /* we are now done with all control */
12587 sctp_m_freem(control);
12590 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12591 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12592 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12593 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12594 if (srcv->sinfo_flags & SCTP_ABORT) {
12597 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12598 error = ECONNRESET;
12602 /* Ok, we will attempt a msgsnd :> */
12604 p->td_ru.ru_msgsnd++;
12606 /* Are we aborting? */
12607 if (srcv->sinfo_flags & SCTP_ABORT) {
12609 int tot_demand, tot_out = 0, max_out;
12611 SCTP_STAT_INCR(sctps_sends_with_abort);
12612 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12613 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12614 /* It has to be up before we abort */
12615 /* how big is the user initiated abort? */
12616 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12620 if (hold_tcblock) {
12621 SCTP_TCB_UNLOCK(stcb);
12625 struct mbuf *cntm = NULL;
12627 mm = sctp_get_mbuf_for_msg(1, 0, M_WAIT, 1, MT_DATA);
12631 tot_out += SCTP_BUF_LEN(cntm);
12632 cntm = SCTP_BUF_NEXT(cntm);
12635 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12637 /* Must fit in a MTU */
12639 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12640 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12642 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12646 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAIT, 1, MT_DATA);
12649 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12653 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12654 max_out -= sizeof(struct sctp_abort_msg);
12655 if (tot_out > max_out) {
12659 struct sctp_paramhdr *ph;
12661 /* now move forward the data pointer */
12662 ph = mtod(mm, struct sctp_paramhdr *);
12663 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12664 ph->param_length = htons((sizeof(struct sctp_paramhdr) + tot_out));
12666 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12668 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12671 * Here if we can't get his data we
12672 * still abort we just don't get to
12673 * send the users note :-0
12680 SCTP_BUF_NEXT(mm) = top;
12684 if (hold_tcblock == 0) {
12685 SCTP_TCB_LOCK(stcb);
12688 atomic_add_int(&stcb->asoc.refcnt, -1);
12689 free_cnt_applied = 0;
12690 /* release this lock, otherwise we hang on ourselves */
12691 sctp_abort_an_association(stcb->sctp_ep, stcb,
12692 SCTP_RESPONSE_TO_USER_REQ,
12693 mm, SCTP_SO_LOCKED);
12694 /* now relock the stcb so everything is sane */
12698 * In this case top is already chained to mm avoid double
12699 * free, since we free it below if top != NULL and driver
12700 * would free it after sending the packet out
12707 /* Calculate the maximum we can send */
12708 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12709 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12710 if (non_blocking) {
12711 /* we already checked for non-blocking above. */
12714 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12719 if (hold_tcblock) {
12720 SCTP_TCB_UNLOCK(stcb);
12723 /* Is the stream no. valid? */
12724 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12725 /* Invalid stream number */
12726 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12730 if (asoc->strmout == NULL) {
12731 /* huh? software error */
12732 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12736 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12737 if ((user_marks_eor == 0) &&
12738 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12739 /* It will NEVER fit */
12740 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12744 if ((uio == NULL) && user_marks_eor) {
12746 * We do not support eeor mode for
12747 * sending with mbuf chains (like sendfile).
12749 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12753 if (user_marks_eor) {
12754 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12757 * For non-eeor the whole message must fit in
12758 * the socket send buffer.
12760 local_add_more = sndlen;
12763 if (non_blocking) {
12764 goto skip_preblock;
12766 if (((max_len <= local_add_more) &&
12767 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12769 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12770 /* No room right now ! */
12771 SOCKBUF_LOCK(&so->so_snd);
12772 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12773 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12774 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12775 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12776 (unsigned int)SCTP_SB_LIMIT_SND(so),
12779 stcb->asoc.stream_queue_cnt,
12780 stcb->asoc.chunks_on_out_queue,
12781 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12782 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12783 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, so, asoc, sndlen);
12786 stcb->block_entry = &be;
12787 error = sbwait(&so->so_snd);
12788 stcb->block_entry = NULL;
12789 if (error || so->so_error || be.error) {
12792 error = so->so_error;
12797 SOCKBUF_UNLOCK(&so->so_snd);
12800 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12801 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12802 so, asoc, stcb->asoc.total_output_queue_size);
12804 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12807 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12809 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12810 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12814 SOCKBUF_UNLOCK(&so->so_snd);
12817 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12821 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
12822 * case NOTE: uio will be null when top/mbuf is passed
12825 if (srcv->sinfo_flags & SCTP_EOF) {
12826 got_all_of_the_send = 1;
12829 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12835 struct sctp_stream_queue_pending *sp;
12836 struct sctp_stream_out *strm;
12839 SCTP_TCB_SEND_LOCK(stcb);
12840 if ((asoc->stream_locked) &&
12841 (asoc->stream_locked_on != srcv->sinfo_stream)) {
12842 SCTP_TCB_SEND_UNLOCK(stcb);
12843 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12847 SCTP_TCB_SEND_UNLOCK(stcb);
12849 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
12850 if (strm->last_msg_incomplete == 0) {
12852 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error, non_blocking);
12853 if ((sp == NULL) || (error)) {
12856 SCTP_TCB_SEND_LOCK(stcb);
12857 if (sp->msg_is_complete) {
12858 strm->last_msg_incomplete = 0;
12859 asoc->stream_locked = 0;
12862 * Just got locked to this guy in case of an
12865 strm->last_msg_incomplete = 1;
12866 asoc->stream_locked = 1;
12867 asoc->stream_locked_on = srcv->sinfo_stream;
12868 sp->sender_all_done = 0;
12870 sctp_snd_sb_alloc(stcb, sp->length);
12871 atomic_add_int(&asoc->stream_queue_cnt, 1);
12872 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
12873 sp->strseq = strm->next_sequence_sent;
12874 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_SCTP) {
12875 sctp_misc_ints(SCTP_STRMOUT_LOG_ASSIGN,
12876 (uintptr_t) stcb, sp->length,
12877 (uint32_t) ((srcv->sinfo_stream << 16) | sp->strseq), 0);
12879 strm->next_sequence_sent++;
12881 SCTP_STAT_INCR(sctps_sends_with_unord);
12883 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
12884 if ((strm->next_spoke.tqe_next == NULL) &&
12885 (strm->next_spoke.tqe_prev == NULL)) {
12886 /* Not on wheel, insert */
12887 sctp_insert_on_wheel(stcb, asoc, strm, 1);
12889 SCTP_TCB_SEND_UNLOCK(stcb);
12891 SCTP_TCB_SEND_LOCK(stcb);
12892 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
12893 SCTP_TCB_SEND_UNLOCK(stcb);
12895 /* ???? Huh ??? last msg is gone */
12897 panic("Warning: Last msg marked incomplete, yet nothing left?");
12899 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
12900 strm->last_msg_incomplete = 0;
12906 while (uio->uio_resid > 0) {
12907 /* How much room do we have? */
12908 struct mbuf *new_tail, *mm;
12910 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12911 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
12915 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
12916 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
12917 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
12920 if (hold_tcblock) {
12921 SCTP_TCB_UNLOCK(stcb);
12924 mm = sctp_copy_resume(sp, uio, srcv, max_len, user_marks_eor, &error, &sndout, &new_tail);
12925 if ((mm == NULL) || error) {
12931 /* Update the mbuf and count */
12932 SCTP_TCB_SEND_LOCK(stcb);
12933 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12935 * we need to get out. Peer probably
12939 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
12940 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12941 error = ECONNRESET;
12943 SCTP_TCB_SEND_UNLOCK(stcb);
12946 if (sp->tail_mbuf) {
12947 /* tack it to the end */
12948 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
12949 sp->tail_mbuf = new_tail;
12951 /* A stolen mbuf */
12953 sp->tail_mbuf = new_tail;
12955 sctp_snd_sb_alloc(stcb, sndout);
12956 atomic_add_int(&sp->length, sndout);
12959 /* Did we reach EOR? */
12960 if ((uio->uio_resid == 0) &&
12961 ((user_marks_eor == 0) ||
12962 (srcv->sinfo_flags & SCTP_EOF) ||
12963 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12964 sp->msg_is_complete = 1;
12966 sp->msg_is_complete = 0;
12968 SCTP_TCB_SEND_UNLOCK(stcb);
12970 if (uio->uio_resid == 0) {
12975 if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
12977 * This is ugly but we must assure locking
12980 if (hold_tcblock == 0) {
12981 SCTP_TCB_LOCK(stcb);
12984 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
12985 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12986 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12987 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12993 SCTP_TCB_UNLOCK(stcb);
12996 /* wait for space now */
12997 if (non_blocking) {
12998 /* Non-blocking io in place out */
13001 /* What about the INIT, send it maybe */
13002 if (queue_only_for_init) {
13003 if (hold_tcblock == 0) {
13004 SCTP_TCB_LOCK(stcb);
13007 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13008 /* a collision took us forward? */
13011 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13012 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13016 if ((net->flight_size > net->cwnd) &&
13017 (asoc->sctp_cmt_on_off == 0)) {
13018 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13020 } else if (asoc->ifp_had_enobuf) {
13021 SCTP_STAT_INCR(sctps_ifnomemqueued);
13022 if (net->flight_size > (2 * net->mtu)) {
13025 asoc->ifp_had_enobuf = 0;
13027 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13028 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13029 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13030 (stcb->asoc.total_flight > 0) &&
13031 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13032 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13035 * Ok, Nagle is set on and we have data outstanding.
13036 * Don't send anything and let SACKs drive out the
13037 * data unless wen have a "full" segment to send.
13039 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13040 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13042 SCTP_STAT_INCR(sctps_naglequeued);
13045 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13046 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13047 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13049 SCTP_STAT_INCR(sctps_naglesent);
13052 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13054 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13055 nagle_applies, un_sent);
13056 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13057 stcb->asoc.total_flight,
13058 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13060 if (queue_only_for_init)
13061 queue_only_for_init = 0;
13062 if ((queue_only == 0) && (nagle_applies == 0)) {
13064 * need to start chunk output
13065 * before blocking.. note that if
13066 * a lock is already applied, then
13067 * the input via the net is happening
13068 * and I don't need to start output :-D
13070 if (hold_tcblock == 0) {
13071 if (SCTP_TCB_TRYLOCK(stcb)) {
13073 sctp_chunk_output(inp,
13075 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13078 sctp_chunk_output(inp,
13080 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13082 if (hold_tcblock == 1) {
13083 SCTP_TCB_UNLOCK(stcb);
13087 SOCKBUF_LOCK(&so->so_snd);
13089 * This is a bit strange, but I think it will
13090 * work. The total_output_queue_size is locked and
13091 * protected by the TCB_LOCK, which we just released.
13092 * There is a race that can occur between releasing it
13093 * above, and me getting the socket lock, where sacks
13094 * come in but we have not put the SB_WAIT on the
13095 * so_snd buffer to get the wakeup. After the LOCK
13096 * is applied the sack_processing will also need to
13097 * LOCK the so->so_snd to do the actual sowwakeup(). So
13098 * once we have the socket buffer lock if we recheck the
13099 * size we KNOW we will get to sleep safely with the
13100 * wakeup flag in place.
13102 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13103 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13104 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13105 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13106 so, asoc, uio->uio_resid);
13109 stcb->block_entry = &be;
13110 error = sbwait(&so->so_snd);
13111 stcb->block_entry = NULL;
13113 if (error || so->so_error || be.error) {
13116 error = so->so_error;
13121 SOCKBUF_UNLOCK(&so->so_snd);
13124 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13125 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13126 so, asoc, stcb->asoc.total_output_queue_size);
13129 SOCKBUF_UNLOCK(&so->so_snd);
13130 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13134 SCTP_TCB_SEND_LOCK(stcb);
13136 if (sp->msg_is_complete == 0) {
13137 strm->last_msg_incomplete = 1;
13138 asoc->stream_locked = 1;
13139 asoc->stream_locked_on = srcv->sinfo_stream;
13141 sp->sender_all_done = 1;
13142 strm->last_msg_incomplete = 0;
13143 asoc->stream_locked = 0;
13146 SCTP_PRINTF("Huh no sp TSNH?\n");
13147 strm->last_msg_incomplete = 0;
13148 asoc->stream_locked = 0;
13150 SCTP_TCB_SEND_UNLOCK(stcb);
13151 if (uio->uio_resid == 0) {
13152 got_all_of_the_send = 1;
13155 /* We send in a 0, since we do NOT have any locks */
13156 error = sctp_msg_append(stcb, net, top, srcv, 0);
13158 if (srcv->sinfo_flags & SCTP_EOF) {
13160 * This should only happen for Panda for the mbuf
13161 * send case, which does NOT yet support EEOR mode.
13162 * Thus, we can just set this flag to do the proper
13165 got_all_of_the_send = 1;
13173 if ((srcv->sinfo_flags & SCTP_EOF) &&
13174 (got_all_of_the_send == 1) &&
13175 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) {
13178 SCTP_STAT_INCR(sctps_sends_with_eof);
13180 if (hold_tcblock == 0) {
13181 SCTP_TCB_LOCK(stcb);
13184 cnt = sctp_is_there_unsent_data(stcb);
13185 if (TAILQ_EMPTY(&asoc->send_queue) &&
13186 TAILQ_EMPTY(&asoc->sent_queue) &&
13188 if (asoc->locked_on_sending) {
13191 /* there is nothing queued to send, so I'm done... */
13192 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13193 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13194 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13195 /* only send SHUTDOWN the first time through */
13196 sctp_send_shutdown(stcb, stcb->asoc.primary_destination);
13197 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13198 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13200 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13201 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13202 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13203 asoc->primary_destination);
13204 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13205 asoc->primary_destination);
13209 * we still got (or just got) data to send, so set
13213 * XXX sockets draft says that SCTP_EOF should be
13214 * sent with no data. currently, we will allow user
13215 * data to be sent first and move to
13218 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13219 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13220 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13221 if (hold_tcblock == 0) {
13222 SCTP_TCB_LOCK(stcb);
13225 if (asoc->locked_on_sending) {
13226 /* Locked to send out the data */
13227 struct sctp_stream_queue_pending *sp;
13229 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13231 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13232 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13235 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13236 if (TAILQ_EMPTY(&asoc->send_queue) &&
13237 TAILQ_EMPTY(&asoc->sent_queue) &&
13238 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13240 if (free_cnt_applied) {
13241 atomic_add_int(&stcb->asoc.refcnt, -1);
13242 free_cnt_applied = 0;
13244 sctp_abort_an_association(stcb->sctp_ep, stcb,
13245 SCTP_RESPONSE_TO_USER_REQ,
13246 NULL, SCTP_SO_LOCKED);
13248 * now relock the stcb so everything
13255 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13256 asoc->primary_destination);
13257 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13262 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13263 some_on_control = 1;
13265 if (queue_only_for_init) {
13266 if (hold_tcblock == 0) {
13267 SCTP_TCB_LOCK(stcb);
13270 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13271 /* a collision took us forward? */
13274 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13275 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13279 if ((net->flight_size > net->cwnd) &&
13280 (stcb->asoc.sctp_cmt_on_off == 0)) {
13281 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13283 } else if (asoc->ifp_had_enobuf) {
13284 SCTP_STAT_INCR(sctps_ifnomemqueued);
13285 if (net->flight_size > (2 * net->mtu)) {
13288 asoc->ifp_had_enobuf = 0;
13290 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13291 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13292 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13293 (stcb->asoc.total_flight > 0) &&
13294 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13295 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13297 * Ok, Nagle is set on and we have data outstanding.
13298 * Don't send anything and let SACKs drive out the
13299 * data unless wen have a "full" segment to send.
13301 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13302 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13304 SCTP_STAT_INCR(sctps_naglequeued);
13307 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13308 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13309 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13311 SCTP_STAT_INCR(sctps_naglesent);
13314 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13315 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13316 nagle_applies, un_sent);
13317 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13318 stcb->asoc.total_flight,
13319 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13321 if (queue_only_for_init)
13322 queue_only_for_init = 0;
13323 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13324 /* we can attempt to send too. */
13325 if (hold_tcblock == 0) {
13327 * If there is activity recv'ing sacks no need to
13330 if (SCTP_TCB_TRYLOCK(stcb)) {
13331 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13335 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13337 } else if ((queue_only == 0) &&
13338 (stcb->asoc.peers_rwnd == 0) &&
13339 (stcb->asoc.total_flight == 0)) {
13340 /* We get to have a probe outstanding */
13341 if (hold_tcblock == 0) {
13343 SCTP_TCB_LOCK(stcb);
13345 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13346 } else if (some_on_control) {
13347 int num_out, reason, frag_point;
13349 /* Here we do control only */
13350 if (hold_tcblock == 0) {
13352 SCTP_TCB_LOCK(stcb);
13354 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13355 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13356 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13358 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13359 queue_only, stcb->asoc.peers_rwnd, un_sent,
13360 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13361 stcb->asoc.total_output_queue_size, error);
13366 if (local_soresv && stcb) {
13367 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13370 if (create_lock_applied) {
13371 SCTP_ASOC_CREATE_UNLOCK(inp);
13372 create_lock_applied = 0;
13374 if ((stcb) && hold_tcblock) {
13375 SCTP_TCB_UNLOCK(stcb);
13377 if (stcb && free_cnt_applied) {
13378 atomic_add_int(&stcb->asoc.refcnt, -1);
13382 if (mtx_owned(&stcb->tcb_mtx)) {
13383 panic("Leaving with tcb mtx owned?");
13385 if (mtx_owned(&stcb->tcb_send_mtx)) {
13386 panic("Leaving with tcb send mtx owned?");
13392 sctp_validate_no_locks(inp);
13394 printf("Warning - inp is NULL so cant validate locks\n");
13401 sctp_m_freem(control);
13408 * generate an AUTHentication chunk, if required
13411 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13412 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13413 struct sctp_tcb *stcb, uint8_t chunk)
13415 struct mbuf *m_auth;
13416 struct sctp_auth_chunk *auth;
13419 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13423 /* sysctl disabled auth? */
13424 if (SCTP_BASE_SYSCTL(sctp_auth_disable))
13427 /* peer doesn't do auth... */
13428 if (!stcb->asoc.peer_supports_auth) {
13431 /* does the requested chunk require auth? */
13432 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13435 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_DONTWAIT, 1, MT_HEADER);
13436 if (m_auth == NULL) {
13440 /* reserve some space if this will be the first mbuf */
13442 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13443 /* fill in the AUTH chunk details */
13444 auth = mtod(m_auth, struct sctp_auth_chunk *);
13445 bzero(auth, sizeof(*auth));
13446 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13447 auth->ch.chunk_flags = 0;
13448 chunk_len = sizeof(*auth) +
13449 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13450 auth->ch.chunk_length = htons(chunk_len);
13451 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13452 /* key id and hmac digest will be computed and filled in upon send */
13454 /* save the offset where the auth was inserted into the chain */
13461 *offset += SCTP_BUF_LEN(cn);
13462 cn = SCTP_BUF_NEXT(cn);
13467 /* update length and return pointer to the auth chunk */
13468 SCTP_BUF_LEN(m_auth) = chunk_len;
13469 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13470 if (auth_ret != NULL)
13478 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13480 struct nd_prefix *pfx = NULL;
13481 struct nd_pfxrouter *pfxrtr = NULL;
13482 struct sockaddr_in6 gw6;
13484 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13487 /* get prefix entry of address */
13488 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13489 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13491 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13492 &src6->sin6_addr, &pfx->ndpr_mask))
13495 /* no prefix entry in the prefix list */
13497 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13498 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13501 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13502 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13504 /* search installed gateway from prefix entry */
13505 for (pfxrtr = pfx->ndpr_advrtrs.lh_first; pfxrtr; pfxrtr =
13506 pfxrtr->pfr_next) {
13507 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13508 gw6.sin6_family = AF_INET6;
13509 gw6.sin6_len = sizeof(struct sockaddr_in6);
13510 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13511 sizeof(struct in6_addr));
13512 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13513 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13514 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13515 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13516 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13517 ro->ro_rt->rt_gateway)) {
13518 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13522 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13529 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13531 struct sockaddr_in *sin, *mask;
13532 struct ifaddr *ifa;
13533 struct in_addr srcnetaddr, gwnetaddr;
13535 if (ro == NULL || ro->ro_rt == NULL ||
13536 sifa->address.sa.sa_family != AF_INET) {
13539 ifa = (struct ifaddr *)sifa->ifa;
13540 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13541 sin = (struct sockaddr_in *)&sifa->address.sin;
13542 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13543 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13544 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13545 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13547 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13548 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13549 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13550 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13551 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13552 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {