2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
33 /* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
40 #include <netinet/sctp_var.h>
41 #include <netinet/sctp_sysctl.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctp_pcb.h>
44 #include <netinet/sctputil.h>
45 #include <netinet/sctp_output.h>
46 #include <netinet/sctp_uio.h>
47 #include <netinet/sctputil.h>
48 #include <netinet/sctp_auth.h>
49 #include <netinet/sctp_timer.h>
50 #include <netinet/sctp_asconf.h>
51 #include <netinet/sctp_indata.h>
52 #include <netinet/sctp_bsd_addr.h>
53 #include <netinet/sctp_input.h>
54 #include <netinet/sctp_crc32.h>
55 #include <netinet/udp.h>
56 #include <machine/in_cksum.h>
60 #define SCTP_MAX_GAPS_INARRAY 4
62 uint8_t right_edge; /* mergable on the right edge */
63 uint8_t left_edge; /* mergable on the left edge */
66 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
69 struct sack_track sack_array[256] = {
70 {0, 0, 0, 0, /* 0x00 */
77 {1, 0, 1, 0, /* 0x01 */
84 {0, 0, 1, 0, /* 0x02 */
91 {1, 0, 1, 0, /* 0x03 */
98 {0, 0, 1, 0, /* 0x04 */
105 {1, 0, 2, 0, /* 0x05 */
112 {0, 0, 1, 0, /* 0x06 */
119 {1, 0, 1, 0, /* 0x07 */
126 {0, 0, 1, 0, /* 0x08 */
133 {1, 0, 2, 0, /* 0x09 */
140 {0, 0, 2, 0, /* 0x0a */
147 {1, 0, 2, 0, /* 0x0b */
154 {0, 0, 1, 0, /* 0x0c */
161 {1, 0, 2, 0, /* 0x0d */
168 {0, 0, 1, 0, /* 0x0e */
175 {1, 0, 1, 0, /* 0x0f */
182 {0, 0, 1, 0, /* 0x10 */
189 {1, 0, 2, 0, /* 0x11 */
196 {0, 0, 2, 0, /* 0x12 */
203 {1, 0, 2, 0, /* 0x13 */
210 {0, 0, 2, 0, /* 0x14 */
217 {1, 0, 3, 0, /* 0x15 */
224 {0, 0, 2, 0, /* 0x16 */
231 {1, 0, 2, 0, /* 0x17 */
238 {0, 0, 1, 0, /* 0x18 */
245 {1, 0, 2, 0, /* 0x19 */
252 {0, 0, 2, 0, /* 0x1a */
259 {1, 0, 2, 0, /* 0x1b */
266 {0, 0, 1, 0, /* 0x1c */
273 {1, 0, 2, 0, /* 0x1d */
280 {0, 0, 1, 0, /* 0x1e */
287 {1, 0, 1, 0, /* 0x1f */
294 {0, 0, 1, 0, /* 0x20 */
301 {1, 0, 2, 0, /* 0x21 */
308 {0, 0, 2, 0, /* 0x22 */
315 {1, 0, 2, 0, /* 0x23 */
322 {0, 0, 2, 0, /* 0x24 */
329 {1, 0, 3, 0, /* 0x25 */
336 {0, 0, 2, 0, /* 0x26 */
343 {1, 0, 2, 0, /* 0x27 */
350 {0, 0, 2, 0, /* 0x28 */
357 {1, 0, 3, 0, /* 0x29 */
364 {0, 0, 3, 0, /* 0x2a */
371 {1, 0, 3, 0, /* 0x2b */
378 {0, 0, 2, 0, /* 0x2c */
385 {1, 0, 3, 0, /* 0x2d */
392 {0, 0, 2, 0, /* 0x2e */
399 {1, 0, 2, 0, /* 0x2f */
406 {0, 0, 1, 0, /* 0x30 */
413 {1, 0, 2, 0, /* 0x31 */
420 {0, 0, 2, 0, /* 0x32 */
427 {1, 0, 2, 0, /* 0x33 */
434 {0, 0, 2, 0, /* 0x34 */
441 {1, 0, 3, 0, /* 0x35 */
448 {0, 0, 2, 0, /* 0x36 */
455 {1, 0, 2, 0, /* 0x37 */
462 {0, 0, 1, 0, /* 0x38 */
469 {1, 0, 2, 0, /* 0x39 */
476 {0, 0, 2, 0, /* 0x3a */
483 {1, 0, 2, 0, /* 0x3b */
490 {0, 0, 1, 0, /* 0x3c */
497 {1, 0, 2, 0, /* 0x3d */
504 {0, 0, 1, 0, /* 0x3e */
511 {1, 0, 1, 0, /* 0x3f */
518 {0, 0, 1, 0, /* 0x40 */
525 {1, 0, 2, 0, /* 0x41 */
532 {0, 0, 2, 0, /* 0x42 */
539 {1, 0, 2, 0, /* 0x43 */
546 {0, 0, 2, 0, /* 0x44 */
553 {1, 0, 3, 0, /* 0x45 */
560 {0, 0, 2, 0, /* 0x46 */
567 {1, 0, 2, 0, /* 0x47 */
574 {0, 0, 2, 0, /* 0x48 */
581 {1, 0, 3, 0, /* 0x49 */
588 {0, 0, 3, 0, /* 0x4a */
595 {1, 0, 3, 0, /* 0x4b */
602 {0, 0, 2, 0, /* 0x4c */
609 {1, 0, 3, 0, /* 0x4d */
616 {0, 0, 2, 0, /* 0x4e */
623 {1, 0, 2, 0, /* 0x4f */
630 {0, 0, 2, 0, /* 0x50 */
637 {1, 0, 3, 0, /* 0x51 */
644 {0, 0, 3, 0, /* 0x52 */
651 {1, 0, 3, 0, /* 0x53 */
658 {0, 0, 3, 0, /* 0x54 */
665 {1, 0, 4, 0, /* 0x55 */
672 {0, 0, 3, 0, /* 0x56 */
679 {1, 0, 3, 0, /* 0x57 */
686 {0, 0, 2, 0, /* 0x58 */
693 {1, 0, 3, 0, /* 0x59 */
700 {0, 0, 3, 0, /* 0x5a */
707 {1, 0, 3, 0, /* 0x5b */
714 {0, 0, 2, 0, /* 0x5c */
721 {1, 0, 3, 0, /* 0x5d */
728 {0, 0, 2, 0, /* 0x5e */
735 {1, 0, 2, 0, /* 0x5f */
742 {0, 0, 1, 0, /* 0x60 */
749 {1, 0, 2, 0, /* 0x61 */
756 {0, 0, 2, 0, /* 0x62 */
763 {1, 0, 2, 0, /* 0x63 */
770 {0, 0, 2, 0, /* 0x64 */
777 {1, 0, 3, 0, /* 0x65 */
784 {0, 0, 2, 0, /* 0x66 */
791 {1, 0, 2, 0, /* 0x67 */
798 {0, 0, 2, 0, /* 0x68 */
805 {1, 0, 3, 0, /* 0x69 */
812 {0, 0, 3, 0, /* 0x6a */
819 {1, 0, 3, 0, /* 0x6b */
826 {0, 0, 2, 0, /* 0x6c */
833 {1, 0, 3, 0, /* 0x6d */
840 {0, 0, 2, 0, /* 0x6e */
847 {1, 0, 2, 0, /* 0x6f */
854 {0, 0, 1, 0, /* 0x70 */
861 {1, 0, 2, 0, /* 0x71 */
868 {0, 0, 2, 0, /* 0x72 */
875 {1, 0, 2, 0, /* 0x73 */
882 {0, 0, 2, 0, /* 0x74 */
889 {1, 0, 3, 0, /* 0x75 */
896 {0, 0, 2, 0, /* 0x76 */
903 {1, 0, 2, 0, /* 0x77 */
910 {0, 0, 1, 0, /* 0x78 */
917 {1, 0, 2, 0, /* 0x79 */
924 {0, 0, 2, 0, /* 0x7a */
931 {1, 0, 2, 0, /* 0x7b */
938 {0, 0, 1, 0, /* 0x7c */
945 {1, 0, 2, 0, /* 0x7d */
952 {0, 0, 1, 0, /* 0x7e */
959 {1, 0, 1, 0, /* 0x7f */
966 {0, 1, 1, 0, /* 0x80 */
973 {1, 1, 2, 0, /* 0x81 */
980 {0, 1, 2, 0, /* 0x82 */
987 {1, 1, 2, 0, /* 0x83 */
994 {0, 1, 2, 0, /* 0x84 */
1001 {1, 1, 3, 0, /* 0x85 */
1008 {0, 1, 2, 0, /* 0x86 */
1015 {1, 1, 2, 0, /* 0x87 */
1022 {0, 1, 2, 0, /* 0x88 */
1029 {1, 1, 3, 0, /* 0x89 */
1036 {0, 1, 3, 0, /* 0x8a */
1043 {1, 1, 3, 0, /* 0x8b */
1050 {0, 1, 2, 0, /* 0x8c */
1057 {1, 1, 3, 0, /* 0x8d */
1064 {0, 1, 2, 0, /* 0x8e */
1071 {1, 1, 2, 0, /* 0x8f */
1078 {0, 1, 2, 0, /* 0x90 */
1085 {1, 1, 3, 0, /* 0x91 */
1092 {0, 1, 3, 0, /* 0x92 */
1099 {1, 1, 3, 0, /* 0x93 */
1106 {0, 1, 3, 0, /* 0x94 */
1113 {1, 1, 4, 0, /* 0x95 */
1120 {0, 1, 3, 0, /* 0x96 */
1127 {1, 1, 3, 0, /* 0x97 */
1134 {0, 1, 2, 0, /* 0x98 */
1141 {1, 1, 3, 0, /* 0x99 */
1148 {0, 1, 3, 0, /* 0x9a */
1155 {1, 1, 3, 0, /* 0x9b */
1162 {0, 1, 2, 0, /* 0x9c */
1169 {1, 1, 3, 0, /* 0x9d */
1176 {0, 1, 2, 0, /* 0x9e */
1183 {1, 1, 2, 0, /* 0x9f */
1190 {0, 1, 2, 0, /* 0xa0 */
1197 {1, 1, 3, 0, /* 0xa1 */
1204 {0, 1, 3, 0, /* 0xa2 */
1211 {1, 1, 3, 0, /* 0xa3 */
1218 {0, 1, 3, 0, /* 0xa4 */
1225 {1, 1, 4, 0, /* 0xa5 */
1232 {0, 1, 3, 0, /* 0xa6 */
1239 {1, 1, 3, 0, /* 0xa7 */
1246 {0, 1, 3, 0, /* 0xa8 */
1253 {1, 1, 4, 0, /* 0xa9 */
1260 {0, 1, 4, 0, /* 0xaa */
1267 {1, 1, 4, 0, /* 0xab */
1274 {0, 1, 3, 0, /* 0xac */
1281 {1, 1, 4, 0, /* 0xad */
1288 {0, 1, 3, 0, /* 0xae */
1295 {1, 1, 3, 0, /* 0xaf */
1302 {0, 1, 2, 0, /* 0xb0 */
1309 {1, 1, 3, 0, /* 0xb1 */
1316 {0, 1, 3, 0, /* 0xb2 */
1323 {1, 1, 3, 0, /* 0xb3 */
1330 {0, 1, 3, 0, /* 0xb4 */
1337 {1, 1, 4, 0, /* 0xb5 */
1344 {0, 1, 3, 0, /* 0xb6 */
1351 {1, 1, 3, 0, /* 0xb7 */
1358 {0, 1, 2, 0, /* 0xb8 */
1365 {1, 1, 3, 0, /* 0xb9 */
1372 {0, 1, 3, 0, /* 0xba */
1379 {1, 1, 3, 0, /* 0xbb */
1386 {0, 1, 2, 0, /* 0xbc */
1393 {1, 1, 3, 0, /* 0xbd */
1400 {0, 1, 2, 0, /* 0xbe */
1407 {1, 1, 2, 0, /* 0xbf */
1414 {0, 1, 1, 0, /* 0xc0 */
1421 {1, 1, 2, 0, /* 0xc1 */
1428 {0, 1, 2, 0, /* 0xc2 */
1435 {1, 1, 2, 0, /* 0xc3 */
1442 {0, 1, 2, 0, /* 0xc4 */
1449 {1, 1, 3, 0, /* 0xc5 */
1456 {0, 1, 2, 0, /* 0xc6 */
1463 {1, 1, 2, 0, /* 0xc7 */
1470 {0, 1, 2, 0, /* 0xc8 */
1477 {1, 1, 3, 0, /* 0xc9 */
1484 {0, 1, 3, 0, /* 0xca */
1491 {1, 1, 3, 0, /* 0xcb */
1498 {0, 1, 2, 0, /* 0xcc */
1505 {1, 1, 3, 0, /* 0xcd */
1512 {0, 1, 2, 0, /* 0xce */
1519 {1, 1, 2, 0, /* 0xcf */
1526 {0, 1, 2, 0, /* 0xd0 */
1533 {1, 1, 3, 0, /* 0xd1 */
1540 {0, 1, 3, 0, /* 0xd2 */
1547 {1, 1, 3, 0, /* 0xd3 */
1554 {0, 1, 3, 0, /* 0xd4 */
1561 {1, 1, 4, 0, /* 0xd5 */
1568 {0, 1, 3, 0, /* 0xd6 */
1575 {1, 1, 3, 0, /* 0xd7 */
1582 {0, 1, 2, 0, /* 0xd8 */
1589 {1, 1, 3, 0, /* 0xd9 */
1596 {0, 1, 3, 0, /* 0xda */
1603 {1, 1, 3, 0, /* 0xdb */
1610 {0, 1, 2, 0, /* 0xdc */
1617 {1, 1, 3, 0, /* 0xdd */
1624 {0, 1, 2, 0, /* 0xde */
1631 {1, 1, 2, 0, /* 0xdf */
1638 {0, 1, 1, 0, /* 0xe0 */
1645 {1, 1, 2, 0, /* 0xe1 */
1652 {0, 1, 2, 0, /* 0xe2 */
1659 {1, 1, 2, 0, /* 0xe3 */
1666 {0, 1, 2, 0, /* 0xe4 */
1673 {1, 1, 3, 0, /* 0xe5 */
1680 {0, 1, 2, 0, /* 0xe6 */
1687 {1, 1, 2, 0, /* 0xe7 */
1694 {0, 1, 2, 0, /* 0xe8 */
1701 {1, 1, 3, 0, /* 0xe9 */
1708 {0, 1, 3, 0, /* 0xea */
1715 {1, 1, 3, 0, /* 0xeb */
1722 {0, 1, 2, 0, /* 0xec */
1729 {1, 1, 3, 0, /* 0xed */
1736 {0, 1, 2, 0, /* 0xee */
1743 {1, 1, 2, 0, /* 0xef */
1750 {0, 1, 1, 0, /* 0xf0 */
1757 {1, 1, 2, 0, /* 0xf1 */
1764 {0, 1, 2, 0, /* 0xf2 */
1771 {1, 1, 2, 0, /* 0xf3 */
1778 {0, 1, 2, 0, /* 0xf4 */
1785 {1, 1, 3, 0, /* 0xf5 */
1792 {0, 1, 2, 0, /* 0xf6 */
1799 {1, 1, 2, 0, /* 0xf7 */
1806 {0, 1, 1, 0, /* 0xf8 */
1813 {1, 1, 2, 0, /* 0xf9 */
1820 {0, 1, 2, 0, /* 0xfa */
1827 {1, 1, 2, 0, /* 0xfb */
1834 {0, 1, 1, 0, /* 0xfc */
1841 {1, 1, 2, 0, /* 0xfd */
1848 {0, 1, 1, 0, /* 0xfe */
1855 {1, 1, 1, 0, /* 0xff */
1866 sctp_is_address_in_scope(struct sctp_ifa *ifa,
1867 int ipv4_addr_legal,
1868 int ipv6_addr_legal,
1870 int ipv4_local_scope,
1875 if ((loopback_scope == 0) &&
1876 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1878 * skip loopback if not in scope *
1882 switch (ifa->address.sa.sa_family) {
1885 if (ipv4_addr_legal) {
1886 struct sockaddr_in *sin;
1888 sin = (struct sockaddr_in *)&ifa->address.sin;
1889 if (sin->sin_addr.s_addr == 0) {
1890 /* not in scope , unspecified */
1893 if ((ipv4_local_scope == 0) &&
1894 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1895 /* private address not in scope */
1905 if (ipv6_addr_legal) {
1906 struct sockaddr_in6 *sin6;
1909 * Must update the flags, bummer, which means any
1910 * IFA locks must now be applied HERE <->
1913 sctp_gather_internal_ifa_flags(ifa);
1915 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1918 /* ok to use deprecated addresses? */
1919 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
1920 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1921 /* skip unspecifed addresses */
1924 if ( /* (local_scope == 0) && */
1925 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1928 if ((site_scope == 0) &&
1929 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1943 static struct mbuf *
1944 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa)
1946 struct sctp_paramhdr *parmh;
1950 switch (ifa->address.sa.sa_family) {
1953 len = sizeof(struct sctp_ipv4addr_param);
1958 len = sizeof(struct sctp_ipv6addr_param);
1964 if (M_TRAILINGSPACE(m) >= len) {
1965 /* easy side we just drop it on the end */
1966 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1969 /* Need more space */
1971 while (SCTP_BUF_NEXT(mret) != NULL) {
1972 mret = SCTP_BUF_NEXT(mret);
1974 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(len, 0, M_DONTWAIT, 1, MT_DATA);
1975 if (SCTP_BUF_NEXT(mret) == NULL) {
1976 /* We are hosed, can't add more addresses */
1979 mret = SCTP_BUF_NEXT(mret);
1980 parmh = mtod(mret, struct sctp_paramhdr *);
1982 /* now add the parameter */
1983 switch (ifa->address.sa.sa_family) {
1987 struct sctp_ipv4addr_param *ipv4p;
1988 struct sockaddr_in *sin;
1990 sin = (struct sockaddr_in *)&ifa->address.sin;
1991 ipv4p = (struct sctp_ipv4addr_param *)parmh;
1992 parmh->param_type = htons(SCTP_IPV4_ADDRESS);
1993 parmh->param_length = htons(len);
1994 ipv4p->addr = sin->sin_addr.s_addr;
1995 SCTP_BUF_LEN(mret) += len;
2002 struct sctp_ipv6addr_param *ipv6p;
2003 struct sockaddr_in6 *sin6;
2005 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2006 ipv6p = (struct sctp_ipv6addr_param *)parmh;
2007 parmh->param_type = htons(SCTP_IPV6_ADDRESS);
2008 parmh->param_length = htons(len);
2009 memcpy(ipv6p->addr, &sin6->sin6_addr,
2010 sizeof(ipv6p->addr));
2011 /* clear embedded scope in the address */
2012 in6_clearscope((struct in6_addr *)ipv6p->addr);
2013 SCTP_BUF_LEN(mret) += len;
2025 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2026 struct sctp_scoping *scope,
2027 struct mbuf *m_at, int cnt_inits_to)
2029 struct sctp_vrf *vrf = NULL;
2030 int cnt, limit_out = 0, total_count;
2033 vrf_id = inp->def_vrf_id;
2034 SCTP_IPI_ADDR_RLOCK();
2035 vrf = sctp_find_vrf(vrf_id);
2037 SCTP_IPI_ADDR_RUNLOCK();
2040 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2041 struct sctp_ifa *sctp_ifap;
2042 struct sctp_ifn *sctp_ifnp;
2045 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2047 cnt = SCTP_ADDRESS_LIMIT;
2050 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2051 if ((scope->loopback_scope == 0) &&
2052 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2054 * Skip loopback devices if loopback_scope
2059 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2060 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2063 if (sctp_is_address_in_scope(sctp_ifap,
2064 scope->ipv4_addr_legal,
2065 scope->ipv6_addr_legal,
2066 scope->loopback_scope,
2067 scope->ipv4_local_scope,
2069 scope->site_scope, 1) == 0) {
2073 if (cnt > SCTP_ADDRESS_LIMIT) {
2077 if (cnt > SCTP_ADDRESS_LIMIT) {
2084 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2086 if ((scope->loopback_scope == 0) &&
2087 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2089 * Skip loopback devices if
2090 * loopback_scope not set
2094 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2095 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2098 if (sctp_is_address_in_scope(sctp_ifap,
2099 scope->ipv4_addr_legal,
2100 scope->ipv6_addr_legal,
2101 scope->loopback_scope,
2102 scope->ipv4_local_scope,
2104 scope->site_scope, 0) == 0) {
2107 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap);
2118 if (total_count > SCTP_ADDRESS_LIMIT) {
2119 /* No more addresses */
2127 struct sctp_laddr *laddr;
2130 /* First, how many ? */
2131 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2132 if (laddr->ifa == NULL) {
2135 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2137 * Address being deleted by the system, dont
2141 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2143 * Address being deleted on this ep don't
2148 if (sctp_is_address_in_scope(laddr->ifa,
2149 scope->ipv4_addr_legal,
2150 scope->ipv6_addr_legal,
2151 scope->loopback_scope,
2152 scope->ipv4_local_scope,
2154 scope->site_scope, 1) == 0) {
2159 if (cnt > SCTP_ADDRESS_LIMIT) {
2163 * To get through a NAT we only list addresses if we have
2164 * more than one. That way if you just bind a single address
2165 * we let the source of the init dictate our address.
2168 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2170 if (laddr->ifa == NULL) {
2173 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2176 if (sctp_is_address_in_scope(laddr->ifa,
2177 scope->ipv4_addr_legal,
2178 scope->ipv6_addr_legal,
2179 scope->loopback_scope,
2180 scope->ipv4_local_scope,
2182 scope->site_scope, 0) == 0) {
2185 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa);
2187 if (cnt >= SCTP_ADDRESS_LIMIT) {
2193 SCTP_IPI_ADDR_RUNLOCK();
2197 static struct sctp_ifa *
2198 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2199 uint8_t dest_is_loop,
2200 uint8_t dest_is_priv,
2203 uint8_t dest_is_global = 0;
2205 /* dest_is_priv is true if destination is a private address */
2206 /* dest_is_loop is true if destination is a loopback addresses */
2209 * Here we determine if its a preferred address. A preferred address
2210 * means it is the same scope or higher scope then the destination.
2211 * L = loopback, P = private, G = global
2212 * -----------------------------------------
2213 * src | dest | result
2214 * ----------------------------------------
2216 * -----------------------------------------
2217 * P | L | yes-v4 no-v6
2218 * -----------------------------------------
2219 * G | L | yes-v4 no-v6
2220 * -----------------------------------------
2222 * -----------------------------------------
2224 * -----------------------------------------
2226 * -----------------------------------------
2228 * -----------------------------------------
2230 * -----------------------------------------
2232 * -----------------------------------------
2235 if (ifa->address.sa.sa_family != fam) {
2236 /* forget mis-matched family */
2239 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2242 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2243 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2244 /* Ok the address may be ok */
2246 if (fam == AF_INET6) {
2247 /* ok to use deprecated addresses? no lets not! */
2248 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2249 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2252 if (ifa->src_is_priv && !ifa->src_is_loop) {
2254 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2258 if (ifa->src_is_glob) {
2260 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2267 * Now that we know what is what, implement or table this could in
2268 * theory be done slicker (it used to be), but this is
2269 * straightforward and easier to validate :-)
2271 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2272 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2273 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2274 dest_is_loop, dest_is_priv, dest_is_global);
2276 if ((ifa->src_is_loop) && (dest_is_priv)) {
2277 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2280 if ((ifa->src_is_glob) && (dest_is_priv)) {
2281 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2284 if ((ifa->src_is_loop) && (dest_is_global)) {
2285 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2288 if ((ifa->src_is_priv) && (dest_is_global)) {
2289 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2292 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2293 /* its a preferred address */
2297 static struct sctp_ifa *
2298 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2299 uint8_t dest_is_loop,
2300 uint8_t dest_is_priv,
2303 uint8_t dest_is_global = 0;
2306 * Here we determine if its a acceptable address. A acceptable
2307 * address means it is the same scope or higher scope but we can
2308 * allow for NAT which means its ok to have a global dest and a
2311 * L = loopback, P = private, G = global
2312 * -----------------------------------------
2313 * src | dest | result
2314 * -----------------------------------------
2316 * -----------------------------------------
2317 * P | L | yes-v4 no-v6
2318 * -----------------------------------------
2320 * -----------------------------------------
2322 * -----------------------------------------
2324 * -----------------------------------------
2325 * G | P | yes - May not work
2326 * -----------------------------------------
2328 * -----------------------------------------
2329 * P | G | yes - May not work
2330 * -----------------------------------------
2332 * -----------------------------------------
2335 if (ifa->address.sa.sa_family != fam) {
2336 /* forget non matching family */
2337 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2338 ifa->address.sa.sa_family, fam);
2341 /* Ok the address may be ok */
2342 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2343 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2344 dest_is_loop, dest_is_priv);
2345 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2349 if (fam == AF_INET6) {
2350 /* ok to use deprecated addresses? */
2351 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2354 if (ifa->src_is_priv) {
2355 /* Special case, linklocal to loop */
2362 * Now that we know what is what, implement our table. This could in
2363 * theory be done slicker (it used to be), but this is
2364 * straightforward and easier to validate :-)
2366 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2369 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2372 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2375 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2378 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2379 /* its an acceptable address */
2384 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2386 struct sctp_laddr *laddr;
2389 /* There are no restrictions, no TCB :-) */
2392 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2393 if (laddr->ifa == NULL) {
2394 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2398 if (laddr->ifa == ifa) {
2399 /* Yes it is on the list */
2408 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2410 struct sctp_laddr *laddr;
2414 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2415 if (laddr->ifa == NULL) {
2416 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2420 if ((laddr->ifa == ifa) && laddr->action == 0)
2429 static struct sctp_ifa *
2430 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2433 int non_asoc_addr_ok,
2434 uint8_t dest_is_priv,
2435 uint8_t dest_is_loop,
2438 struct sctp_laddr *laddr, *starting_point;
2441 struct sctp_ifn *sctp_ifn;
2442 struct sctp_ifa *sctp_ifa, *sifa;
2443 struct sctp_vrf *vrf;
2446 vrf = sctp_find_vrf(vrf_id);
2450 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2451 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2452 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2454 * first question, is the ifn we will emit on in our list, if so, we
2455 * want such an address. Note that we first looked for a preferred
2459 /* is a preferred one on the interface we route out? */
2460 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2461 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2462 (non_asoc_addr_ok == 0))
2464 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2469 if (sctp_is_addr_in_ep(inp, sifa)) {
2470 atomic_add_int(&sifa->refcount, 1);
2476 * ok, now we now need to find one on the list of the addresses. We
2477 * can't get one on the emitting interface so let's find first a
2478 * preferred one. If not that an acceptable one otherwise... we
2481 starting_point = inp->next_addr_touse;
2483 if (inp->next_addr_touse == NULL) {
2484 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2487 for (laddr = inp->next_addr_touse; laddr;
2488 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2489 if (laddr->ifa == NULL) {
2490 /* address has been removed */
2493 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2494 /* address is being deleted */
2497 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2501 atomic_add_int(&sifa->refcount, 1);
2504 if (resettotop == 0) {
2505 inp->next_addr_touse = NULL;
2508 inp->next_addr_touse = starting_point;
2511 if (inp->next_addr_touse == NULL) {
2512 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2515 /* ok, what about an acceptable address in the inp */
2516 for (laddr = inp->next_addr_touse; laddr;
2517 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2518 if (laddr->ifa == NULL) {
2519 /* address has been removed */
2522 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2523 /* address is being deleted */
2526 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2530 atomic_add_int(&sifa->refcount, 1);
2533 if (resettotop == 0) {
2534 inp->next_addr_touse = NULL;
2535 goto once_again_too;
2538 * no address bound can be a source for the destination we are in
2546 static struct sctp_ifa *
2547 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2548 struct sctp_tcb *stcb,
2549 struct sctp_nets *net,
2552 uint8_t dest_is_priv,
2553 uint8_t dest_is_loop,
2554 int non_asoc_addr_ok,
2557 struct sctp_laddr *laddr, *starting_point;
2559 struct sctp_ifn *sctp_ifn;
2560 struct sctp_ifa *sctp_ifa, *sifa;
2561 uint8_t start_at_beginning = 0;
2562 struct sctp_vrf *vrf;
2566 * first question, is the ifn we will emit on in our list, if so, we
2569 vrf = sctp_find_vrf(vrf_id);
2573 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2574 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2575 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2578 * first question, is the ifn we will emit on in our list? If so,
2579 * we want that one. First we look for a preferred. Second, we go
2580 * for an acceptable.
2583 /* first try for a preferred address on the ep */
2584 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2585 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2587 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2588 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2591 if (((non_asoc_addr_ok == 0) &&
2592 (sctp_is_addr_restricted(stcb, sifa))) ||
2593 (non_asoc_addr_ok &&
2594 (sctp_is_addr_restricted(stcb, sifa)) &&
2595 (!sctp_is_addr_pending(stcb, sifa)))) {
2596 /* on the no-no list */
2599 atomic_add_int(&sifa->refcount, 1);
2603 /* next try for an acceptable address on the ep */
2604 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2605 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2607 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2608 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2611 if (((non_asoc_addr_ok == 0) &&
2612 (sctp_is_addr_restricted(stcb, sifa))) ||
2613 (non_asoc_addr_ok &&
2614 (sctp_is_addr_restricted(stcb, sifa)) &&
2615 (!sctp_is_addr_pending(stcb, sifa)))) {
2616 /* on the no-no list */
2619 atomic_add_int(&sifa->refcount, 1);
2626 * if we can't find one like that then we must look at all addresses
2627 * bound to pick one at first preferable then secondly acceptable.
2629 starting_point = stcb->asoc.last_used_address;
2631 if (stcb->asoc.last_used_address == NULL) {
2632 start_at_beginning = 1;
2633 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2635 /* search beginning with the last used address */
2636 for (laddr = stcb->asoc.last_used_address; laddr;
2637 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2638 if (laddr->ifa == NULL) {
2639 /* address has been removed */
2642 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2643 /* address is being deleted */
2646 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2649 if (((non_asoc_addr_ok == 0) &&
2650 (sctp_is_addr_restricted(stcb, sifa))) ||
2651 (non_asoc_addr_ok &&
2652 (sctp_is_addr_restricted(stcb, sifa)) &&
2653 (!sctp_is_addr_pending(stcb, sifa)))) {
2654 /* on the no-no list */
2657 stcb->asoc.last_used_address = laddr;
2658 atomic_add_int(&sifa->refcount, 1);
2661 if (start_at_beginning == 0) {
2662 stcb->asoc.last_used_address = NULL;
2663 goto sctp_from_the_top;
2665 /* now try for any higher scope than the destination */
2666 stcb->asoc.last_used_address = starting_point;
2667 start_at_beginning = 0;
2669 if (stcb->asoc.last_used_address == NULL) {
2670 start_at_beginning = 1;
2671 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2673 /* search beginning with the last used address */
2674 for (laddr = stcb->asoc.last_used_address; laddr;
2675 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2676 if (laddr->ifa == NULL) {
2677 /* address has been removed */
2680 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2681 /* address is being deleted */
2684 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2688 if (((non_asoc_addr_ok == 0) &&
2689 (sctp_is_addr_restricted(stcb, sifa))) ||
2690 (non_asoc_addr_ok &&
2691 (sctp_is_addr_restricted(stcb, sifa)) &&
2692 (!sctp_is_addr_pending(stcb, sifa)))) {
2693 /* on the no-no list */
2696 stcb->asoc.last_used_address = laddr;
2697 atomic_add_int(&sifa->refcount, 1);
2700 if (start_at_beginning == 0) {
2701 stcb->asoc.last_used_address = NULL;
2702 goto sctp_from_the_top2;
2707 static struct sctp_ifa *
2708 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2709 struct sctp_tcb *stcb,
2710 int non_asoc_addr_ok,
2711 uint8_t dest_is_loop,
2712 uint8_t dest_is_priv,
2718 struct sctp_ifa *ifa, *sifa;
2719 int num_eligible_addr = 0;
2722 struct sockaddr_in6 sin6, lsa6;
2724 if (fam == AF_INET6) {
2725 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2726 (void)sa6_recoverscope(&sin6);
2729 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2730 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2731 (non_asoc_addr_ok == 0))
2733 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2738 if (fam == AF_INET6 &&
2740 sifa->src_is_loop && sifa->src_is_priv) {
2742 * don't allow fe80::1 to be a src on loop ::1, we
2743 * don't list it to the peer so we will get an
2748 if (fam == AF_INET6 &&
2749 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2750 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2752 * link-local <-> link-local must belong to the same
2755 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2756 (void)sa6_recoverscope(&lsa6);
2757 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2764 * Check if the IPv6 address matches to next-hop. In the
2765 * mobile case, old IPv6 address may be not deleted from the
2766 * interface. Then, the interface has previous and new
2767 * addresses. We should use one corresponding to the
2768 * next-hop. (by micchie)
2771 if (stcb && fam == AF_INET6 &&
2772 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2773 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2780 /* Avoid topologically incorrect IPv4 address */
2781 if (stcb && fam == AF_INET &&
2782 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2783 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2789 if (sctp_is_address_in_scope(ifa,
2790 stcb->asoc.ipv4_addr_legal,
2791 stcb->asoc.ipv6_addr_legal,
2792 stcb->asoc.loopback_scope,
2793 stcb->asoc.ipv4_local_scope,
2794 stcb->asoc.local_scope,
2795 stcb->asoc.site_scope, 0) == 0) {
2798 if (((non_asoc_addr_ok == 0) &&
2799 (sctp_is_addr_restricted(stcb, sifa))) ||
2800 (non_asoc_addr_ok &&
2801 (sctp_is_addr_restricted(stcb, sifa)) &&
2802 (!sctp_is_addr_pending(stcb, sifa)))) {
2804 * It is restricted for some reason..
2805 * probably not yet added.
2810 if (num_eligible_addr >= addr_wanted) {
2813 num_eligible_addr++;
2820 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2821 struct sctp_tcb *stcb,
2822 int non_asoc_addr_ok,
2823 uint8_t dest_is_loop,
2824 uint8_t dest_is_priv,
2827 struct sctp_ifa *ifa, *sifa;
2828 int num_eligible_addr = 0;
2830 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2831 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2832 (non_asoc_addr_ok == 0)) {
2835 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2841 if (sctp_is_address_in_scope(ifa,
2842 stcb->asoc.ipv4_addr_legal,
2843 stcb->asoc.ipv6_addr_legal,
2844 stcb->asoc.loopback_scope,
2845 stcb->asoc.ipv4_local_scope,
2846 stcb->asoc.local_scope,
2847 stcb->asoc.site_scope, 0) == 0) {
2850 if (((non_asoc_addr_ok == 0) &&
2851 (sctp_is_addr_restricted(stcb, sifa))) ||
2852 (non_asoc_addr_ok &&
2853 (sctp_is_addr_restricted(stcb, sifa)) &&
2854 (!sctp_is_addr_pending(stcb, sifa)))) {
2856 * It is restricted for some reason..
2857 * probably not yet added.
2862 num_eligible_addr++;
2864 return (num_eligible_addr);
2867 static struct sctp_ifa *
2868 sctp_choose_boundall(struct sctp_inpcb *inp,
2869 struct sctp_tcb *stcb,
2870 struct sctp_nets *net,
2873 uint8_t dest_is_priv,
2874 uint8_t dest_is_loop,
2875 int non_asoc_addr_ok,
2878 int cur_addr_num = 0, num_preferred = 0;
2880 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2881 struct sctp_ifa *sctp_ifa, *sifa;
2883 struct sctp_vrf *vrf;
2890 * For boundall we can use any address in the association.
2891 * If non_asoc_addr_ok is set we can use any address (at least in
2892 * theory). So we look for preferred addresses first. If we find one,
2893 * we use it. Otherwise we next try to get an address on the
2894 * interface, which we should be able to do (unless non_asoc_addr_ok
2895 * is false and we are routed out that way). In these cases where we
2896 * can't use the address of the interface we go through all the
2897 * ifn's looking for an address we can use and fill that in. Punting
2898 * means we send back address 0, which will probably cause problems
2899 * actually since then IP will fill in the address of the route ifn,
2900 * which means we probably already rejected it.. i.e. here comes an
2903 vrf = sctp_find_vrf(vrf_id);
2907 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2908 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2909 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2910 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2911 if (sctp_ifn == NULL) {
2912 /* ?? We don't have this guy ?? */
2913 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
2914 goto bound_all_plan_b;
2916 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
2917 ifn_index, sctp_ifn->ifn_name);
2920 cur_addr_num = net->indx_of_eligible_next_to_use;
2922 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
2927 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
2928 num_preferred, sctp_ifn->ifn_name);
2929 if (num_preferred == 0) {
2931 * no eligible addresses, we must use some other interface
2932 * address if we can find one.
2934 goto bound_all_plan_b;
2937 * Ok we have num_eligible_addr set with how many we can use, this
2938 * may vary from call to call due to addresses being deprecated
2941 if (cur_addr_num >= num_preferred) {
2945 * select the nth address from the list (where cur_addr_num is the
2946 * nth) and 0 is the first one, 1 is the second one etc...
2948 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
2950 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
2951 dest_is_priv, cur_addr_num, fam, ro);
2953 /* if sctp_ifa is NULL something changed??, fall to plan b. */
2955 atomic_add_int(&sctp_ifa->refcount, 1);
2957 /* save off where the next one we will want */
2958 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
2963 * plan_b: Look at all interfaces and find a preferred address. If
2964 * no preferred fall through to plan_c.
2967 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
2968 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2969 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
2970 sctp_ifn->ifn_name);
2971 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2972 /* wrong base scope */
2973 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
2976 if ((sctp_ifn == looked_at) && looked_at) {
2977 /* already looked at this guy */
2978 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
2981 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, stcb, non_asoc_addr_ok,
2982 dest_is_loop, dest_is_priv, fam);
2983 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2984 "Found ifn:%p %d preferred source addresses\n",
2985 ifn, num_preferred);
2986 if (num_preferred == 0) {
2987 /* None on this interface. */
2988 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n");
2991 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2992 "num preferred:%d on interface:%p cur_addr_num:%d\n",
2993 num_preferred, sctp_ifn, cur_addr_num);
2996 * Ok we have num_eligible_addr set with how many we can
2997 * use, this may vary from call to call due to addresses
2998 * being deprecated etc..
3000 if (cur_addr_num >= num_preferred) {
3003 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
3004 dest_is_priv, cur_addr_num, fam, ro);
3008 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3009 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3011 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3012 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3013 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3014 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3016 atomic_add_int(&sifa->refcount, 1);
3020 again_with_private_addresses_allowed:
3022 /* plan_c: do we have an acceptable address on the emit interface */
3024 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3025 if (emit_ifn == NULL) {
3026 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3029 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3030 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", sctp_ifa);
3031 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3032 (non_asoc_addr_ok == 0)) {
3033 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3036 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3039 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3043 if (sctp_is_address_in_scope(sifa,
3044 stcb->asoc.ipv4_addr_legal,
3045 stcb->asoc.ipv6_addr_legal,
3046 stcb->asoc.loopback_scope,
3047 stcb->asoc.ipv4_local_scope,
3048 stcb->asoc.local_scope,
3049 stcb->asoc.site_scope, 0) == 0) {
3050 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3054 if (((non_asoc_addr_ok == 0) &&
3055 (sctp_is_addr_restricted(stcb, sifa))) ||
3056 (non_asoc_addr_ok &&
3057 (sctp_is_addr_restricted(stcb, sifa)) &&
3058 (!sctp_is_addr_pending(stcb, sifa)))) {
3060 * It is restricted for some reason..
3061 * probably not yet added.
3063 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n");
3068 printf("Stcb is null - no print\n");
3070 atomic_add_int(&sifa->refcount, 1);
3075 * plan_d: We are in trouble. No preferred address on the emit
3076 * interface. And not even a preferred address on all interfaces. Go
3077 * out and see if we can find an acceptable address somewhere
3078 * amongst all interfaces.
3080 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", looked_at);
3081 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3082 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3083 /* wrong base scope */
3086 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3087 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3088 (non_asoc_addr_ok == 0))
3090 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3096 if (sctp_is_address_in_scope(sifa,
3097 stcb->asoc.ipv4_addr_legal,
3098 stcb->asoc.ipv6_addr_legal,
3099 stcb->asoc.loopback_scope,
3100 stcb->asoc.ipv4_local_scope,
3101 stcb->asoc.local_scope,
3102 stcb->asoc.site_scope, 0) == 0) {
3106 if (((non_asoc_addr_ok == 0) &&
3107 (sctp_is_addr_restricted(stcb, sifa))) ||
3108 (non_asoc_addr_ok &&
3109 (sctp_is_addr_restricted(stcb, sifa)) &&
3110 (!sctp_is_addr_pending(stcb, sifa)))) {
3112 * It is restricted for some
3113 * reason.. probably not yet added.
3123 if ((retried == 0) && (stcb->asoc.ipv4_local_scope == 0)) {
3124 stcb->asoc.ipv4_local_scope = 1;
3126 goto again_with_private_addresses_allowed;
3127 } else if (retried == 1) {
3128 stcb->asoc.ipv4_local_scope = 0;
3135 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3136 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3137 /* wrong base scope */
3140 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3141 struct sctp_ifa *tmp_sifa;
3143 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3144 (non_asoc_addr_ok == 0))
3146 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3149 if (tmp_sifa == NULL) {
3152 if (tmp_sifa == sifa) {
3156 if (sctp_is_address_in_scope(tmp_sifa,
3157 stcb->asoc.ipv4_addr_legal,
3158 stcb->asoc.ipv6_addr_legal,
3159 stcb->asoc.loopback_scope,
3160 stcb->asoc.ipv4_local_scope,
3161 stcb->asoc.local_scope,
3162 stcb->asoc.site_scope, 0) == 0) {
3165 if (((non_asoc_addr_ok == 0) &&
3166 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3167 (non_asoc_addr_ok &&
3168 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3169 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3179 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3180 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3181 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3186 atomic_add_int(&sifa->refcount, 1);
3194 /* tcb may be NULL */
3196 sctp_source_address_selection(struct sctp_inpcb *inp,
3197 struct sctp_tcb *stcb,
3199 struct sctp_nets *net,
3200 int non_asoc_addr_ok, uint32_t vrf_id)
3202 struct sctp_ifa *answer;
3203 uint8_t dest_is_priv, dest_is_loop;
3207 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3211 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3216 * Rules: - Find the route if needed, cache if I can. - Look at
3217 * interface address in route, Is it in the bound list. If so we
3218 * have the best source. - If not we must rotate amongst the
3223 * Do we need to pay attention to scope. We can have a private address
3224 * or a global address we are sourcing or sending to. So if we draw
3226 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3228 * ------------------------------------------
3229 * source * dest * result
3230 * -----------------------------------------
3231 * <a> Private * Global * NAT
3232 * -----------------------------------------
3233 * <b> Private * Private * No problem
3234 * -----------------------------------------
3235 * <c> Global * Private * Huh, How will this work?
3236 * -----------------------------------------
3237 * <d> Global * Global * No Problem
3238 *------------------------------------------
3239 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3241 *------------------------------------------
3242 * source * dest * result
3243 * -----------------------------------------
3244 * <a> Linklocal * Global *
3245 * -----------------------------------------
3246 * <b> Linklocal * Linklocal * No problem
3247 * -----------------------------------------
3248 * <c> Global * Linklocal * Huh, How will this work?
3249 * -----------------------------------------
3250 * <d> Global * Global * No Problem
3251 *------------------------------------------
3252 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3254 * And then we add to that what happens if there are multiple addresses
3255 * assigned to an interface. Remember the ifa on a ifn is a linked
3256 * list of addresses. So one interface can have more than one IP
3257 * address. What happens if we have both a private and a global
3258 * address? Do we then use context of destination to sort out which
3259 * one is best? And what about NAT's sending P->G may get you a NAT
3260 * translation, or should you select the G thats on the interface in
3265 * - count the number of addresses on the interface.
3266 * - if it is one, no problem except case <c>.
3267 * For <a> we will assume a NAT out there.
3268 * - if there are more than one, then we need to worry about scope P
3269 * or G. We should prefer G -> G and P -> P if possible.
3270 * Then as a secondary fall back to mixed types G->P being a last
3272 * - The above all works for bound all, but bound specific we need to
3273 * use the same concept but instead only consider the bound
3274 * addresses. If the bound set is NOT assigned to the interface then
3275 * we must use rotation amongst the bound addresses..
3277 if (ro->ro_rt == NULL) {
3279 * Need a route to cache.
3281 SCTP_RTALLOC(ro, vrf_id);
3283 if (ro->ro_rt == NULL) {
3286 fam = ro->ro_dst.sa_family;
3287 dest_is_priv = dest_is_loop = 0;
3288 /* Setup our scopes for the destination */
3292 /* Scope based on outbound address */
3293 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3296 /* mark it as local */
3297 net->addr_is_local = 1;
3299 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3306 /* Scope based on outbound address */
3307 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3308 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3310 * If the address is a loopback address, which
3311 * consists of "::1" OR "fe80::1%lo0", we are
3312 * loopback scope. But we don't use dest_is_priv
3313 * (link local addresses).
3317 /* mark it as local */
3318 net->addr_is_local = 1;
3320 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3326 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3327 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3328 SCTP_IPI_ADDR_RLOCK();
3329 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3333 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3334 dest_is_priv, dest_is_loop,
3335 non_asoc_addr_ok, fam);
3336 SCTP_IPI_ADDR_RUNLOCK();
3343 answer = sctp_choose_boundspecific_stcb(inp, stcb, net, ro,
3344 vrf_id, dest_is_priv,
3346 non_asoc_addr_ok, fam);
3348 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3353 SCTP_IPI_ADDR_RUNLOCK();
3358 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3361 int tlen, at, found;
3362 struct sctp_sndinfo sndinfo;
3363 struct sctp_prinfo prinfo;
3364 struct sctp_authinfo authinfo;
3366 tlen = SCTP_BUF_LEN(control);
3370 * Independent of how many mbufs, find the c_type inside the control
3371 * structure and copy out the data.
3374 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3375 /* There is not enough room for one more. */
3378 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3379 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(struct cmsghdr))) {
3380 /* We dont't have a complete CMSG header. */
3383 if (((int)cmh.cmsg_len + at) > tlen) {
3384 /* We don't have the complete CMSG. */
3387 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3388 ((c_type == cmh.cmsg_type) ||
3389 ((c_type == SCTP_SNDRCV) &&
3390 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3391 (cmh.cmsg_type == SCTP_PRINFO) ||
3392 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3393 if (c_type == cmh.cmsg_type) {
3394 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < cpsize) {
3397 /* It is exactly what we want. Copy it out. */
3398 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), cpsize, (caddr_t)data);
3401 struct sctp_sndrcvinfo *sndrcvinfo;
3403 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3405 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3408 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3410 switch (cmh.cmsg_type) {
3412 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_sndinfo)) {
3415 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3416 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3417 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3418 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3419 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3420 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3423 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_prinfo)) {
3426 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3427 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3428 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3431 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_authinfo)) {
3434 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3435 sndrcvinfo->sinfo_keynumber_valid = 1;
3436 sndrcvinfo->sinfo_keynumber = authinfo.auth_keyid;
3444 at += CMSG_ALIGN(cmh.cmsg_len);
3450 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3454 struct sctp_initmsg initmsg;
3457 struct sockaddr_in sin;
3461 struct sockaddr_in6 sin6;
3465 tlen = SCTP_BUF_LEN(control);
3468 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3469 /* There is not enough room for one more. */
3473 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3474 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(struct cmsghdr))) {
3475 /* We dont't have a complete CMSG header. */
3479 if (((int)cmh.cmsg_len + at) > tlen) {
3480 /* We don't have the complete CMSG. */
3484 if (cmh.cmsg_level == IPPROTO_SCTP) {
3485 switch (cmh.cmsg_type) {
3487 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_initmsg)) {
3491 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3492 if (initmsg.sinit_max_attempts)
3493 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3494 if (initmsg.sinit_num_ostreams)
3495 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3496 if (initmsg.sinit_max_instreams)
3497 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3498 if (initmsg.sinit_max_init_timeo)
3499 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3500 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3501 struct sctp_stream_out *tmp_str;
3504 /* Default is NOT correct */
3505 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3506 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3507 SCTP_TCB_UNLOCK(stcb);
3508 SCTP_MALLOC(tmp_str,
3509 struct sctp_stream_out *,
3510 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3512 SCTP_TCB_LOCK(stcb);
3513 if (tmp_str != NULL) {
3514 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3515 stcb->asoc.strmout = tmp_str;
3516 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3518 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3520 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3521 stcb->asoc.strmout[i].next_sequence_sent = 0;
3522 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3523 stcb->asoc.strmout[i].stream_no = i;
3524 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3525 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3530 case SCTP_DSTADDRV4:
3531 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in_addr)) {
3535 memset(&sin, 0, sizeof(struct sockaddr_in));
3536 sin.sin_family = AF_INET;
3537 sin.sin_len = sizeof(struct sockaddr_in);
3538 sin.sin_port = stcb->rport;
3539 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3540 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3541 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3542 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3546 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3547 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3554 case SCTP_DSTADDRV6:
3555 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in6_addr)) {
3559 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3560 sin6.sin6_family = AF_INET6;
3561 sin6.sin6_len = sizeof(struct sockaddr_in6);
3562 sin6.sin6_port = stcb->rport;
3563 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3564 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3565 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3570 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3571 in6_sin6_2_sin(&sin, &sin6);
3572 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3573 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3574 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3578 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3579 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3585 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
3586 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3596 at += CMSG_ALIGN(cmh.cmsg_len);
3601 static struct sctp_tcb *
3602 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3604 struct mbuf *control,
3605 struct sctp_nets **net_p,
3610 struct sctp_tcb *stcb;
3611 struct sockaddr *addr;
3614 struct sockaddr_in sin;
3618 struct sockaddr_in6 sin6;
3622 tlen = SCTP_BUF_LEN(control);
3625 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3626 /* There is not enough room for one more. */
3630 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3631 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(struct cmsghdr))) {
3632 /* We dont't have a complete CMSG header. */
3636 if (((int)cmh.cmsg_len + at) > tlen) {
3637 /* We don't have the complete CMSG. */
3641 if (cmh.cmsg_level == IPPROTO_SCTP) {
3642 switch (cmh.cmsg_type) {
3644 case SCTP_DSTADDRV4:
3645 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in_addr)) {
3649 memset(&sin, 0, sizeof(struct sockaddr_in));
3650 sin.sin_family = AF_INET;
3651 sin.sin_len = sizeof(struct sockaddr_in);
3652 sin.sin_port = port;
3653 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3654 addr = (struct sockaddr *)&sin;
3658 case SCTP_DSTADDRV6:
3659 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in6_addr)) {
3663 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3664 sin6.sin6_family = AF_INET6;
3665 sin6.sin6_len = sizeof(struct sockaddr_in6);
3666 sin6.sin6_port = port;
3667 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3669 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3670 in6_sin6_2_sin(&sin, &sin6);
3671 addr = (struct sockaddr *)&sin;
3674 addr = (struct sockaddr *)&sin6;
3682 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3688 at += CMSG_ALIGN(cmh.cmsg_len);
3693 static struct mbuf *
3694 sctp_add_cookie(struct sctp_inpcb *inp, struct mbuf *init, int init_offset,
3695 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3697 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3698 struct sctp_state_cookie *stc;
3699 struct sctp_paramhdr *ph;
3705 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3706 sizeof(struct sctp_paramhdr)), 0,
3707 M_DONTWAIT, 1, MT_DATA);
3711 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_DONTWAIT);
3712 if (copy_init == NULL) {
3716 #ifdef SCTP_MBUF_LOGGING
3717 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3722 if (SCTP_BUF_IS_EXTENDED(mat)) {
3723 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3725 mat = SCTP_BUF_NEXT(mat);
3729 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3731 if (copy_initack == NULL) {
3733 sctp_m_freem(copy_init);
3736 #ifdef SCTP_MBUF_LOGGING
3737 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3742 if (SCTP_BUF_IS_EXTENDED(mat)) {
3743 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3745 mat = SCTP_BUF_NEXT(mat);
3749 /* easy side we just drop it on the end */
3750 ph = mtod(mret, struct sctp_paramhdr *);
3751 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3752 sizeof(struct sctp_paramhdr);
3753 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3754 sizeof(struct sctp_paramhdr));
3755 ph->param_type = htons(SCTP_STATE_COOKIE);
3756 ph->param_length = 0; /* fill in at the end */
3757 /* Fill in the stc cookie data */
3758 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3760 /* tack the INIT and then the INIT-ACK onto the chain */
3763 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3764 cookie_sz += SCTP_BUF_LEN(m_at);
3765 if (SCTP_BUF_NEXT(m_at) == NULL) {
3766 SCTP_BUF_NEXT(m_at) = copy_init;
3771 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3772 cookie_sz += SCTP_BUF_LEN(m_at);
3773 if (SCTP_BUF_NEXT(m_at) == NULL) {
3774 SCTP_BUF_NEXT(m_at) = copy_initack;
3779 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3780 cookie_sz += SCTP_BUF_LEN(m_at);
3781 if (SCTP_BUF_NEXT(m_at) == NULL) {
3785 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_DONTWAIT, 1, MT_DATA);
3787 /* no space, so free the entire chain */
3791 SCTP_BUF_LEN(sig) = 0;
3792 SCTP_BUF_NEXT(m_at) = sig;
3794 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3795 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3797 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3798 cookie_sz += SCTP_SIGNATURE_SIZE;
3799 ph->param_length = htons(cookie_sz);
3805 sctp_get_ect(struct sctp_tcb *stcb,
3806 struct sctp_tmit_chunk *chk)
3808 if ((stcb != NULL) && (stcb->asoc.ecn_allowed == 1)) {
3809 return (SCTP_ECT0_BIT);
3816 sctp_handle_no_route(struct sctp_tcb *stcb,
3817 struct sctp_nets *net,
3820 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3823 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3824 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3825 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3826 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3827 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", net);
3828 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3830 SCTP_FAILED_THRESHOLD,
3833 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3834 net->dest_state &= ~SCTP_ADDR_PF;
3838 if (net == stcb->asoc.primary_destination) {
3839 /* need a new primary */
3840 struct sctp_nets *alt;
3842 alt = sctp_find_alternate_net(stcb, net, 0);
3844 if (stcb->asoc.alternate) {
3845 sctp_free_remote_addr(stcb->asoc.alternate);
3847 stcb->asoc.alternate = alt;
3848 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3849 if (net->ro._s_addr) {
3850 sctp_free_ifa(net->ro._s_addr);
3851 net->ro._s_addr = NULL;
3853 net->src_addr_selected = 0;
3861 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3862 struct sctp_tcb *stcb, /* may be NULL */
3863 struct sctp_nets *net,
3864 struct sockaddr *to,
3866 uint32_t auth_offset,
3867 struct sctp_auth_chunk *auth,
3868 uint16_t auth_keyid,
3869 int nofragment_flag,
3871 struct sctp_tmit_chunk *chk,
3878 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3881 union sctp_sockstore *over_addr,
3884 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3887 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3888 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3889 * - fill in the HMAC digest of any AUTH chunk in the packet.
3890 * - calculate and fill in the SCTP checksum.
3891 * - prepend an IP address header.
3892 * - if boundall use INADDR_ANY.
3893 * - if boundspecific do source address selection.
3894 * - set fragmentation option for ipV4.
3895 * - On return from IP output, check/adjust mtu size of output
3896 * interface and smallest_mtu size as well.
3898 /* Will need ifdefs around this */
3901 struct sctphdr *sctphdr;
3905 sctp_route_t *ro = NULL;
3906 struct udphdr *udp = NULL;
3909 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3910 struct socket *so = NULL;
3914 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
3915 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
3920 vrf_id = stcb->asoc.vrf_id;
3922 vrf_id = inp->def_vrf_id;
3925 /* fill in the HMAC digest for any AUTH chunk in the packet */
3926 if ((auth != NULL) && (stcb != NULL)) {
3927 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
3930 tos_value = net->dscp;
3932 tos_value = stcb->asoc.default_dscp;
3934 tos_value = inp->sctp_ep.default_dscp;
3937 switch (to->sa_family) {
3941 struct ip *ip = NULL;
3942 sctp_route_t iproute;
3945 len = sizeof(struct ip) + sizeof(struct sctphdr);
3947 len += sizeof(struct udphdr);
3949 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
3952 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
3955 SCTP_ALIGN_TO_END(newm, len);
3956 SCTP_BUF_LEN(newm) = len;
3957 SCTP_BUF_NEXT(newm) = m;
3961 if (net->flowidset == 0) {
3962 panic("Flow ID not set");
3965 m->m_pkthdr.flowid = net->flowid;
3966 m->m_flags |= M_FLOWID;
3968 if ((init != NULL) && (init->m_flags & M_FLOWID)) {
3969 m->m_pkthdr.flowid = init->m_pkthdr.flowid;
3970 m->m_flags |= M_FLOWID;
3973 packet_length = sctp_calculate_len(m);
3974 ip = mtod(m, struct ip *);
3975 ip->ip_v = IPVERSION;
3976 ip->ip_hl = (sizeof(struct ip) >> 2);
3977 if (tos_value == 0) {
3979 * This means especially, that it is not set
3980 * at the SCTP layer. So use the value from
3983 tos_value = inp->ip_inp.inp.inp_ip_tos;
3987 tos_value |= sctp_get_ect(stcb, chk);
3989 if ((nofragment_flag) && (port == 0)) {
3994 /* FreeBSD has a function for ip_id's */
3995 ip->ip_id = ip_newid();
3997 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
3998 ip->ip_len = packet_length;
3999 ip->ip_tos = tos_value;
4001 ip->ip_p = IPPROTO_UDP;
4003 ip->ip_p = IPPROTO_SCTP;
4008 memset(&iproute, 0, sizeof(iproute));
4009 memcpy(&ro->ro_dst, to, to->sa_len);
4011 ro = (sctp_route_t *) & net->ro;
4013 /* Now the address selection part */
4014 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4016 /* call the routine to select the src address */
4017 if (net && out_of_asoc_ok == 0) {
4018 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4019 sctp_free_ifa(net->ro._s_addr);
4020 net->ro._s_addr = NULL;
4021 net->src_addr_selected = 0;
4027 if (net->src_addr_selected == 0) {
4028 /* Cache the source address */
4029 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4032 net->src_addr_selected = 1;
4034 if (net->ro._s_addr == NULL) {
4035 /* No route to host */
4036 net->src_addr_selected = 0;
4037 sctp_handle_no_route(stcb, net, so_locked);
4038 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4040 return (EHOSTUNREACH);
4042 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4044 if (over_addr == NULL) {
4045 struct sctp_ifa *_lsrc;
4047 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4051 if (_lsrc == NULL) {
4052 sctp_handle_no_route(stcb, net, so_locked);
4053 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4055 return (EHOSTUNREACH);
4057 ip->ip_src = _lsrc->address.sin.sin_addr;
4058 sctp_free_ifa(_lsrc);
4060 ip->ip_src = over_addr->sin.sin_addr;
4061 SCTP_RTALLOC(ro, vrf_id);
4065 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4066 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4067 udp->uh_dport = port;
4068 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4069 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4070 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4072 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4075 sctphdr->src_port = src_port;
4076 sctphdr->dest_port = dest_port;
4077 sctphdr->v_tag = v_tag;
4078 sctphdr->checksum = 0;
4081 * If source address selection fails and we find no
4082 * route then the ip_output should fail as well with
4083 * a NO_ROUTE_TO_HOST type error. We probably should
4084 * catch that somewhere and abort the association
4085 * right away (assuming this is an INIT being sent).
4087 if (ro->ro_rt == NULL) {
4089 * src addr selection failed to find a route
4090 * (or valid source addr), so we can't get
4091 * there from here (yet)!
4093 sctp_handle_no_route(stcb, net, so_locked);
4094 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4096 return (EHOSTUNREACH);
4098 if (ro != &iproute) {
4099 memcpy(&iproute, ro, sizeof(*ro));
4101 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4102 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4103 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4104 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4105 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4108 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4109 /* failed to prepend data, give up */
4110 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4114 #ifdef SCTP_PACKET_LOGGING
4115 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4116 sctp_packet_log(m, packet_length);
4118 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4120 #if defined(SCTP_WITH_NO_CSUM)
4121 SCTP_STAT_INCR(sctps_sendnocrc);
4123 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
4125 (stcb->asoc.loopback_scope))) {
4126 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4127 SCTP_STAT_INCR(sctps_sendswcrc);
4129 SCTP_STAT_INCR(sctps_sendnocrc);
4132 SCTP_ENABLE_UDP_CSUM(o_pak);
4134 #if defined(SCTP_WITH_NO_CSUM)
4135 SCTP_STAT_INCR(sctps_sendnocrc);
4137 m->m_pkthdr.csum_flags = CSUM_SCTP;
4138 m->m_pkthdr.csum_data = 0;
4139 SCTP_STAT_INCR(sctps_sendhwcrc);
4142 /* send it out. table id is taken from stcb */
4143 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4144 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4145 so = SCTP_INP_SO(inp);
4146 SCTP_SOCKET_UNLOCK(so, 0);
4149 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4150 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4151 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4152 atomic_add_int(&stcb->asoc.refcnt, 1);
4153 SCTP_TCB_UNLOCK(stcb);
4154 SCTP_SOCKET_LOCK(so, 0);
4155 SCTP_TCB_LOCK(stcb);
4156 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4159 SCTP_STAT_INCR(sctps_sendpackets);
4160 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4162 SCTP_STAT_INCR(sctps_senderrors);
4164 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4166 /* free tempy routes */
4173 * PMTU check versus smallest asoc MTU goes
4176 if ((ro->ro_rt != NULL) &&
4177 (net->ro._s_addr)) {
4180 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4182 mtu -= sizeof(struct udphdr);
4184 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4185 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4188 } else if (ro->ro_rt == NULL) {
4189 /* route was freed */
4190 if (net->ro._s_addr &&
4191 net->src_addr_selected) {
4192 sctp_free_ifa(net->ro._s_addr);
4193 net->ro._s_addr = NULL;
4195 net->src_addr_selected = 0;
4204 uint32_t flowlabel, flowinfo;
4205 struct ip6_hdr *ip6h;
4206 struct route_in6 ip6route;
4208 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4210 struct sockaddr_in6 lsa6_storage;
4212 u_short prev_port = 0;
4216 flowlabel = net->flowlabel;
4218 flowlabel = stcb->asoc.default_flowlabel;
4220 flowlabel = inp->sctp_ep.default_flowlabel;
4222 if (flowlabel == 0) {
4224 * This means especially, that it is not set
4225 * at the SCTP layer. So use the value from
4228 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4230 flowlabel &= 0x000fffff;
4231 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
4233 len += sizeof(struct udphdr);
4235 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
4238 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4241 SCTP_ALIGN_TO_END(newm, len);
4242 SCTP_BUF_LEN(newm) = len;
4243 SCTP_BUF_NEXT(newm) = m;
4247 if (net->flowidset == 0) {
4248 panic("Flow ID not set");
4251 m->m_pkthdr.flowid = net->flowid;
4252 m->m_flags |= M_FLOWID;
4254 if ((init != NULL) && (init->m_flags & M_FLOWID)) {
4255 m->m_pkthdr.flowid = init->m_pkthdr.flowid;
4256 m->m_flags |= M_FLOWID;
4259 packet_length = sctp_calculate_len(m);
4261 ip6h = mtod(m, struct ip6_hdr *);
4262 /* protect *sin6 from overwrite */
4263 sin6 = (struct sockaddr_in6 *)to;
4267 /* KAME hack: embed scopeid */
4268 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4269 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4273 memset(&ip6route, 0, sizeof(ip6route));
4274 ro = (sctp_route_t *) & ip6route;
4275 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4277 ro = (sctp_route_t *) & net->ro;
4280 * We assume here that inp_flow is in host byte
4281 * order within the TCB!
4283 if (tos_value == 0) {
4285 * This means especially, that it is not set
4286 * at the SCTP layer. So use the value from
4289 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4293 tos_value |= sctp_get_ect(stcb, chk);
4297 flowinfo |= tos_value;
4299 flowinfo |= flowlabel;
4300 ip6h->ip6_flow = htonl(flowinfo);
4302 ip6h->ip6_nxt = IPPROTO_UDP;
4304 ip6h->ip6_nxt = IPPROTO_SCTP;
4306 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4307 ip6h->ip6_dst = sin6->sin6_addr;
4310 * Add SRC address selection here: we can only reuse
4311 * to a limited degree the kame src-addr-sel, since
4312 * we can try their selection but it may not be
4315 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4316 lsa6_tmp.sin6_family = AF_INET6;
4317 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4319 if (net && out_of_asoc_ok == 0) {
4320 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4321 sctp_free_ifa(net->ro._s_addr);
4322 net->ro._s_addr = NULL;
4323 net->src_addr_selected = 0;
4329 if (net->src_addr_selected == 0) {
4330 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4331 /* KAME hack: embed scopeid */
4332 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4333 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4336 /* Cache the source address */
4337 net->ro._s_addr = sctp_source_address_selection(inp,
4343 (void)sa6_recoverscope(sin6);
4344 net->src_addr_selected = 1;
4346 if (net->ro._s_addr == NULL) {
4347 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4348 net->src_addr_selected = 0;
4349 sctp_handle_no_route(stcb, net, so_locked);
4350 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4352 return (EHOSTUNREACH);
4354 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4356 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4357 /* KAME hack: embed scopeid */
4358 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4359 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4362 if (over_addr == NULL) {
4363 struct sctp_ifa *_lsrc;
4365 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4369 if (_lsrc == NULL) {
4370 sctp_handle_no_route(stcb, net, so_locked);
4371 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4373 return (EHOSTUNREACH);
4375 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4376 sctp_free_ifa(_lsrc);
4378 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4379 SCTP_RTALLOC(ro, vrf_id);
4381 (void)sa6_recoverscope(sin6);
4383 lsa6->sin6_port = inp->sctp_lport;
4385 if (ro->ro_rt == NULL) {
4387 * src addr selection failed to find a route
4388 * (or valid source addr), so we can't get
4391 sctp_handle_no_route(stcb, net, so_locked);
4392 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4394 return (EHOSTUNREACH);
4397 * XXX: sa6 may not have a valid sin6_scope_id in
4398 * the non-SCOPEDROUTING case.
4400 bzero(&lsa6_storage, sizeof(lsa6_storage));
4401 lsa6_storage.sin6_family = AF_INET6;
4402 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4403 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4404 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4405 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4410 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4411 lsa6_storage.sin6_port = inp->sctp_lport;
4412 lsa6 = &lsa6_storage;
4413 ip6h->ip6_src = lsa6->sin6_addr;
4416 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4417 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4418 udp->uh_dport = port;
4419 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4421 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4423 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4426 sctphdr->src_port = src_port;
4427 sctphdr->dest_port = dest_port;
4428 sctphdr->v_tag = v_tag;
4429 sctphdr->checksum = 0;
4432 * We set the hop limit now since there is a good
4433 * chance that our ro pointer is now filled
4435 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4436 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4439 /* Copy to be sure something bad is not happening */
4440 sin6->sin6_addr = ip6h->ip6_dst;
4441 lsa6->sin6_addr = ip6h->ip6_src;
4444 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4445 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4446 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4447 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4448 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4450 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4452 * preserve the port and scope for link
4455 prev_scope = sin6->sin6_scope_id;
4456 prev_port = sin6->sin6_port;
4458 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4459 /* failed to prepend data, give up */
4461 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4464 #ifdef SCTP_PACKET_LOGGING
4465 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4466 sctp_packet_log(m, packet_length);
4468 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4470 #if defined(SCTP_WITH_NO_CSUM)
4471 SCTP_STAT_INCR(sctps_sendnocrc);
4473 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
4475 (stcb->asoc.loopback_scope))) {
4476 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4477 SCTP_STAT_INCR(sctps_sendswcrc);
4479 SCTP_STAT_INCR(sctps_sendnocrc);
4482 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4483 udp->uh_sum = 0xffff;
4486 #if defined(SCTP_WITH_NO_CSUM)
4487 SCTP_STAT_INCR(sctps_sendnocrc);
4489 m->m_pkthdr.csum_flags = CSUM_SCTP;
4490 m->m_pkthdr.csum_data = 0;
4491 SCTP_STAT_INCR(sctps_sendhwcrc);
4494 /* send it out. table id is taken from stcb */
4495 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4496 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4497 so = SCTP_INP_SO(inp);
4498 SCTP_SOCKET_UNLOCK(so, 0);
4501 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4502 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4503 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4504 atomic_add_int(&stcb->asoc.refcnt, 1);
4505 SCTP_TCB_UNLOCK(stcb);
4506 SCTP_SOCKET_LOCK(so, 0);
4507 SCTP_TCB_LOCK(stcb);
4508 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4512 /* for link local this must be done */
4513 sin6->sin6_scope_id = prev_scope;
4514 sin6->sin6_port = prev_port;
4516 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4517 SCTP_STAT_INCR(sctps_sendpackets);
4518 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4520 SCTP_STAT_INCR(sctps_senderrors);
4523 /* Now if we had a temp route free it */
4529 * PMTU check versus smallest asoc MTU goes
4532 if (ro->ro_rt == NULL) {
4533 /* Route was freed */
4534 if (net->ro._s_addr &&
4535 net->src_addr_selected) {
4536 sctp_free_ifa(net->ro._s_addr);
4537 net->ro._s_addr = NULL;
4539 net->src_addr_selected = 0;
4541 if ((ro->ro_rt != NULL) &&
4542 (net->ro._s_addr)) {
4545 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4547 (stcb->asoc.smallest_mtu > mtu)) {
4548 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4551 net->mtu -= sizeof(struct udphdr);
4555 if (ND_IFINFO(ifp)->linkmtu &&
4556 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4557 sctp_mtu_size_reset(inp,
4559 ND_IFINFO(ifp)->linkmtu);
4567 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4568 ((struct sockaddr *)to)->sa_family);
4570 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4577 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4578 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4583 struct mbuf *m, *m_at, *mp_last;
4584 struct sctp_nets *net;
4585 struct sctp_init_chunk *init;
4586 struct sctp_supported_addr_param *sup_addr;
4587 struct sctp_adaptation_layer_indication *ali;
4588 struct sctp_ecn_supported_param *ecn;
4589 struct sctp_prsctp_supported_param *prsctp;
4590 struct sctp_supported_chunk_types_param *pr_supported;
4591 int cnt_inits_to = 0;
4596 /* INIT's always go to the primary (and usually ONLY address) */
4598 net = stcb->asoc.primary_destination;
4600 net = TAILQ_FIRST(&stcb->asoc.nets);
4605 /* we confirm any address we send an INIT to */
4606 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4607 (void)sctp_set_primary_addr(stcb, NULL, net);
4609 /* we confirm any address we send an INIT to */
4610 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4612 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4614 if (((struct sockaddr *)&(net->ro._l_addr))->sa_family == AF_INET6) {
4616 * special hook, if we are sending to link local it will not
4617 * show up in our private address count.
4619 struct sockaddr_in6 *sin6l;
4621 sin6l = &net->ro._l_addr.sin6;
4622 if (IN6_IS_ADDR_LINKLOCAL(&sin6l->sin6_addr))
4626 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4627 /* This case should not happen */
4628 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4631 /* start the INIT timer */
4632 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4634 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA);
4636 /* No memory, INIT timer will re-attempt. */
4637 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4640 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
4642 * assume peer supports asconf in order to be able to queue local
4643 * address changes while an INIT is in flight and before the assoc
4646 stcb->asoc.peer_supports_asconf = 1;
4647 /* Now lets put the SCTP header in place */
4648 init = mtod(m, struct sctp_init_chunk *);
4649 /* now the chunk header */
4650 init->ch.chunk_type = SCTP_INITIATION;
4651 init->ch.chunk_flags = 0;
4652 /* fill in later from mbuf we build */
4653 init->ch.chunk_length = 0;
4654 /* place in my tag */
4655 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4656 /* set up some of the credits. */
4657 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4658 SCTP_MINIMAL_RWND));
4660 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4661 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4662 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4663 /* now the address restriction */
4664 /* XXX Should we take the address family of the socket into account? */
4665 sup_addr = (struct sctp_supported_addr_param *)((caddr_t)init +
4667 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4670 /* we support 2 types: IPv4/IPv6 */
4671 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + 2 * sizeof(uint16_t));
4672 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
4673 sup_addr->addr_type[1] = htons(SCTP_IPV6_ADDRESS);
4675 /* we support 1 type: IPv6 */
4676 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + sizeof(uint16_t));
4677 sup_addr->addr_type[0] = htons(SCTP_IPV6_ADDRESS);
4678 sup_addr->addr_type[1] = htons(0); /* this is the padding */
4681 /* we support 1 type: IPv4 */
4682 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + sizeof(uint16_t));
4683 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
4684 sup_addr->addr_type[1] = htons(0); /* this is the padding */
4686 SCTP_BUF_LEN(m) += sizeof(struct sctp_supported_addr_param);
4687 /* adaptation layer indication parameter */
4688 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)sup_addr + sizeof(struct sctp_supported_addr_param));
4689 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4690 ali->ph.param_length = htons(sizeof(*ali));
4691 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
4692 SCTP_BUF_LEN(m) += sizeof(*ali);
4693 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
4695 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4696 /* Add NAT friendly parameter */
4697 struct sctp_paramhdr *ph;
4699 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4700 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4701 ph->param_length = htons(sizeof(struct sctp_paramhdr));
4702 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
4703 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ph + sizeof(*ph));
4705 /* now any cookie time extensions */
4706 if (stcb->asoc.cookie_preserve_req) {
4707 struct sctp_cookie_perserve_param *cookie_preserve;
4709 cookie_preserve = (struct sctp_cookie_perserve_param *)(ecn);
4710 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4711 cookie_preserve->ph.param_length = htons(
4712 sizeof(*cookie_preserve));
4713 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4714 SCTP_BUF_LEN(m) += sizeof(*cookie_preserve);
4715 ecn = (struct sctp_ecn_supported_param *)(
4716 (caddr_t)cookie_preserve + sizeof(*cookie_preserve));
4717 stcb->asoc.cookie_preserve_req = 0;
4720 if (stcb->asoc.ecn_allowed == 1) {
4721 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
4722 ecn->ph.param_length = htons(sizeof(*ecn));
4723 SCTP_BUF_LEN(m) += sizeof(*ecn);
4724 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
4727 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
4729 /* And now tell the peer we do pr-sctp */
4730 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
4731 prsctp->ph.param_length = htons(sizeof(*prsctp));
4732 SCTP_BUF_LEN(m) += sizeof(*prsctp);
4734 /* And now tell the peer we do all the extensions */
4735 pr_supported = (struct sctp_supported_chunk_types_param *)
4736 ((caddr_t)prsctp + sizeof(*prsctp));
4737 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4739 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4740 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4741 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4742 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4743 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4744 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4745 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4747 if (stcb->asoc.sctp_nr_sack_on_off == 1) {
4748 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4750 p_len = sizeof(*pr_supported) + num_ext;
4751 pr_supported->ph.param_length = htons(p_len);
4752 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
4753 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4756 /* add authentication parameters */
4757 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4758 struct sctp_auth_random *randp;
4759 struct sctp_auth_hmac_algo *hmacs;
4760 struct sctp_auth_chunk_list *chunks;
4762 /* attach RANDOM parameter, if available */
4763 if (stcb->asoc.authinfo.random != NULL) {
4764 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4765 p_len = sizeof(*randp) + stcb->asoc.authinfo.random_len;
4766 /* random key already contains the header */
4767 bcopy(stcb->asoc.authinfo.random->key, randp, p_len);
4768 /* zero out any padding required */
4769 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
4770 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4772 /* add HMAC_ALGO parameter */
4773 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4774 p_len = sctp_serialize_hmaclist(stcb->asoc.local_hmacs,
4775 (uint8_t *) hmacs->hmac_ids);
4777 p_len += sizeof(*hmacs);
4778 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4779 hmacs->ph.param_length = htons(p_len);
4780 /* zero out any padding required */
4781 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
4782 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4784 /* add CHUNKS parameter */
4785 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4786 p_len = sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks,
4787 chunks->chunk_types);
4789 p_len += sizeof(*chunks);
4790 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4791 chunks->ph.param_length = htons(p_len);
4792 /* zero out any padding required */
4793 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
4794 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4798 /* now the addresses */
4800 struct sctp_scoping scp;
4803 * To optimize this we could put the scoping stuff into a
4804 * structure and remove the individual uint8's from the
4805 * assoc structure. Then we could just sifa in the address
4806 * within the stcb.. but for now this is a quick hack to get
4807 * the address stuff teased apart.
4809 scp.ipv4_addr_legal = stcb->asoc.ipv4_addr_legal;
4810 scp.ipv6_addr_legal = stcb->asoc.ipv6_addr_legal;
4811 scp.loopback_scope = stcb->asoc.loopback_scope;
4812 scp.ipv4_local_scope = stcb->asoc.ipv4_local_scope;
4813 scp.local_scope = stcb->asoc.local_scope;
4814 scp.site_scope = stcb->asoc.site_scope;
4816 m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to);
4819 /* calulate the size and update pkt header and chunk header */
4821 for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
4822 if (SCTP_BUF_NEXT(m_at) == NULL)
4824 p_len += SCTP_BUF_LEN(m_at);
4826 init->ch.chunk_length = htons(p_len);
4828 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
4829 * here since the timer will drive a retranmission.
4832 /* I don't expect this to execute but we will be safe here */
4834 if ((padval) && (mp_last)) {
4836 * The compiler worries that mp_last may not be set even
4837 * though I think it is impossible :-> however we add
4838 * mp_last here just in case.
4840 ret = sctp_add_pad_tombuf(mp_last, (4 - padval));
4842 /* Houston we have a problem, no space */
4848 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4849 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4850 (struct sockaddr *)&net->ro._l_addr,
4851 m, 0, NULL, 0, 0, 0, NULL, 0,
4852 inp->sctp_lport, stcb->rport, htonl(0),
4853 net->port, so_locked, NULL, NULL);
4854 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4855 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4856 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4860 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4861 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4864 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4865 * being equal to the beginning of the params i.e. (iphlen +
4866 * sizeof(struct sctp_init_msg) parse through the parameters to the
4867 * end of the mbuf verifying that all parameters are known.
4869 * For unknown parameters build and return a mbuf with
4870 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4871 * processing this chunk stop, and set *abort_processing to 1.
4873 * By having param_offset be pre-set to where parameters begin it is
4874 * hoped that this routine may be reused in the future by new
4877 struct sctp_paramhdr *phdr, params;
4879 struct mbuf *mat, *op_err;
4880 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4881 int at, limit, pad_needed;
4882 uint16_t ptype, plen, padded_size;
4885 *abort_processing = 0;
4888 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4891 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4892 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4893 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4894 ptype = ntohs(phdr->param_type);
4895 plen = ntohs(phdr->param_length);
4896 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4897 /* wacked parameter */
4898 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4901 limit -= SCTP_SIZE32(plen);
4903 * All parameters for all chunks that we know/understand are
4904 * listed here. We process them other places and make
4905 * appropriate stop actions per the upper bits. However this
4906 * is the generic routine processor's can call to get back
4907 * an operr.. to either incorporate (init-ack) or send.
4909 padded_size = SCTP_SIZE32(plen);
4911 /* Param's with variable size */
4912 case SCTP_HEARTBEAT_INFO:
4913 case SCTP_STATE_COOKIE:
4914 case SCTP_UNRECOG_PARAM:
4915 case SCTP_ERROR_CAUSE_IND:
4919 /* Param's with variable size within a range */
4920 case SCTP_CHUNK_LIST:
4921 case SCTP_SUPPORTED_CHUNK_EXT:
4922 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
4923 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
4928 case SCTP_SUPPORTED_ADDRTYPE:
4929 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
4930 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
4936 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
4937 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
4942 case SCTP_SET_PRIM_ADDR:
4943 case SCTP_DEL_IP_ADDRESS:
4944 case SCTP_ADD_IP_ADDRESS:
4945 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
4946 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
4947 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
4952 /* Param's with a fixed size */
4953 case SCTP_IPV4_ADDRESS:
4954 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
4955 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
4960 case SCTP_IPV6_ADDRESS:
4961 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
4962 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
4967 case SCTP_COOKIE_PRESERVE:
4968 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
4969 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
4974 case SCTP_HAS_NAT_SUPPORT:
4977 case SCTP_PRSCTP_SUPPORTED:
4979 if (padded_size != sizeof(struct sctp_paramhdr)) {
4980 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
4985 case SCTP_ECN_CAPABLE:
4986 if (padded_size != sizeof(struct sctp_ecn_supported_param)) {
4987 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
4992 case SCTP_ULP_ADAPTATION:
4993 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
4994 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
4999 case SCTP_SUCCESS_REPORT:
5000 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5001 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5006 case SCTP_HOSTNAME_ADDRESS:
5008 /* We can NOT handle HOST NAME addresses!! */
5011 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5012 *abort_processing = 1;
5013 if (op_err == NULL) {
5014 /* Ok need to try to get a mbuf */
5016 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5018 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5021 l_len += sizeof(struct sctp_paramhdr);
5022 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5024 SCTP_BUF_LEN(op_err) = 0;
5026 * pre-reserve space for ip
5027 * and sctp header and
5031 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5033 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5035 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5036 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5040 /* If we have space */
5041 struct sctp_paramhdr s;
5044 uint32_t cpthis = 0;
5046 pad_needed = 4 - (err_at % 4);
5047 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5048 err_at += pad_needed;
5050 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5051 s.param_length = htons(sizeof(s) + plen);
5052 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5053 err_at += sizeof(s);
5054 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5056 sctp_m_freem(op_err);
5058 * we are out of memory but
5059 * we still need to have a
5060 * look at what to do (the
5061 * system is in trouble
5066 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5074 * we do not recognize the parameter figure out what
5077 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5078 if ((ptype & 0x4000) == 0x4000) {
5079 /* Report bit is set?? */
5080 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5081 if (op_err == NULL) {
5084 /* Ok need to try to get an mbuf */
5086 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5088 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5091 l_len += sizeof(struct sctp_paramhdr);
5092 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5094 SCTP_BUF_LEN(op_err) = 0;
5096 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5098 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5100 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5101 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5105 /* If we have space */
5106 struct sctp_paramhdr s;
5109 uint32_t cpthis = 0;
5111 pad_needed = 4 - (err_at % 4);
5112 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5113 err_at += pad_needed;
5115 s.param_type = htons(SCTP_UNRECOG_PARAM);
5116 s.param_length = htons(sizeof(s) + plen);
5117 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5118 err_at += sizeof(s);
5119 if (plen > sizeof(tempbuf)) {
5120 plen = sizeof(tempbuf);
5122 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5124 sctp_m_freem(op_err);
5126 * we are out of memory but
5127 * we still need to have a
5128 * look at what to do (the
5129 * system is in trouble
5133 goto more_processing;
5135 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5140 if ((ptype & 0x8000) == 0x0000) {
5141 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5144 /* skip this chunk and continue processing */
5145 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5146 at += SCTP_SIZE32(plen);
5151 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5155 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5156 *abort_processing = 1;
5157 if ((op_err == NULL) && phdr) {
5161 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5163 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5165 l_len += (2 * sizeof(struct sctp_paramhdr));
5166 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5168 SCTP_BUF_LEN(op_err) = 0;
5170 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5172 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5174 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5175 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5178 if ((op_err) && phdr) {
5179 struct sctp_paramhdr s;
5182 uint32_t cpthis = 0;
5184 pad_needed = 4 - (err_at % 4);
5185 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5186 err_at += pad_needed;
5188 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5189 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5190 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5191 err_at += sizeof(s);
5192 /* Only copy back the p-hdr that caused the issue */
5193 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5199 sctp_are_there_new_addresses(struct sctp_association *asoc,
5200 struct mbuf *in_initpkt, int iphlen, int offset)
5203 * Given a INIT packet, look through the packet to verify that there
5204 * are NO new addresses. As we go through the parameters add reports
5205 * of any un-understood parameters that require an error. Also we
5206 * must return (1) to drop the packet if we see a un-understood
5207 * parameter that tells us to drop the chunk.
5209 struct sockaddr *sa_touse;
5210 struct sockaddr *sa;
5211 struct sctp_paramhdr *phdr, params;
5212 uint16_t ptype, plen;
5214 struct sctp_nets *net;
5218 struct sockaddr_in sin4, *sa4;
5222 struct sockaddr_in6 sin6, *sa6;
5223 struct ip6_hdr *ip6h;
5228 memset(&sin4, 0, sizeof(sin4));
5229 sin4.sin_family = AF_INET;
5230 sin4.sin_len = sizeof(sin4);
5233 memset(&sin6, 0, sizeof(sin6));
5234 sin6.sin6_family = AF_INET6;
5235 sin6.sin6_len = sizeof(sin6);
5238 /* First what about the src address of the pkt ? */
5239 iph = mtod(in_initpkt, struct ip *);
5240 switch (iph->ip_v) {
5243 /* source addr is IPv4 */
5244 sin4.sin_addr = iph->ip_src;
5245 sa_touse = (struct sockaddr *)&sin4;
5249 case IPV6_VERSION >> 4:
5250 /* source addr is IPv6 */
5251 ip6h = mtod(in_initpkt, struct ip6_hdr *);
5252 sin6.sin6_addr = ip6h->ip6_src;
5253 sa_touse = (struct sockaddr *)&sin6;
5261 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5262 sa = (struct sockaddr *)&net->ro._l_addr;
5263 if (sa->sa_family == sa_touse->sa_family) {
5265 if (sa->sa_family == AF_INET) {
5266 sa4 = (struct sockaddr_in *)sa;
5267 if (sa4->sin_addr.s_addr == sin4.sin_addr.s_addr) {
5274 if (sa->sa_family == AF_INET6) {
5275 sa6 = (struct sockaddr_in6 *)sa;
5276 if (SCTP6_ARE_ADDR_EQUAL(sa6, &sin6)) {
5285 /* New address added! no need to look futher. */
5288 /* Ok so far lets munge through the rest of the packet */
5289 offset += sizeof(struct sctp_init_chunk);
5290 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5293 ptype = ntohs(phdr->param_type);
5294 plen = ntohs(phdr->param_length);
5297 case SCTP_IPV4_ADDRESS:
5299 struct sctp_ipv4addr_param *p4, p4_buf;
5301 phdr = sctp_get_next_param(in_initpkt, offset,
5302 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5303 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5307 p4 = (struct sctp_ipv4addr_param *)phdr;
5308 sin4.sin_addr.s_addr = p4->addr;
5309 sa_touse = (struct sockaddr *)&sin4;
5313 case SCTP_IPV6_ADDRESS:
5315 struct sctp_ipv6addr_param *p6, p6_buf;
5317 phdr = sctp_get_next_param(in_initpkt, offset,
5318 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5319 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5323 p6 = (struct sctp_ipv6addr_param *)phdr;
5324 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5326 sa_touse = (struct sockaddr *)&sin6;
5333 /* ok, sa_touse points to one to check */
5335 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5336 sa = (struct sockaddr *)&net->ro._l_addr;
5337 if (sa->sa_family != sa_touse->sa_family) {
5341 if (sa->sa_family == AF_INET) {
5342 sa4 = (struct sockaddr_in *)sa;
5343 if (sa4->sin_addr.s_addr ==
5344 sin4.sin_addr.s_addr) {
5351 if (sa->sa_family == AF_INET6) {
5352 sa6 = (struct sockaddr_in6 *)sa;
5353 if (SCTP6_ARE_ADDR_EQUAL(
5362 /* New addr added! no need to look further */
5366 offset += SCTP_SIZE32(plen);
5367 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5373 * Given a MBUF chain that was sent into us containing an INIT. Build a
5374 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5375 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5376 * message (i.e. the struct sctp_init_msg).
5379 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5380 struct mbuf *init_pkt, int iphlen, int offset, struct sctphdr *sh,
5381 struct sctp_init_chunk *init_chk, uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5383 struct sctp_association *asoc;
5384 struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last;
5385 struct sctp_init_ack_chunk *initack;
5386 struct sctp_adaptation_layer_indication *ali;
5387 struct sctp_ecn_supported_param *ecn;
5388 struct sctp_prsctp_supported_param *prsctp;
5389 struct sctp_supported_chunk_types_param *pr_supported;
5390 union sctp_sockstore store, store1, *over_addr;
5393 struct sockaddr_in *sin, *to_sin;
5397 struct sockaddr_in6 *sin6, *to_sin6;
5403 struct ip6_hdr *ip6;
5406 struct sockaddr *to;
5407 struct sctp_state_cookie stc;
5408 struct sctp_nets *net = NULL;
5409 uint8_t *signature = NULL;
5410 int cnt_inits_to = 0;
5411 uint16_t his_limit, i_want;
5412 int abort_flag, padval;
5415 int nat_friendly = 0;
5423 if ((asoc != NULL) &&
5424 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5425 (sctp_are_there_new_addresses(asoc, init_pkt, iphlen, offset))) {
5426 /* new addresses, out of here in non-cookie-wait states */
5428 * Send a ABORT, we don't add the new address error clause
5429 * though we even set the T bit and copy in the 0 tag.. this
5430 * looks no different than if no listener was present.
5432 sctp_send_abort(init_pkt, iphlen, sh, 0, NULL, vrf_id, port);
5436 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5437 (offset + sizeof(struct sctp_init_chunk)),
5438 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5441 sctp_send_abort(init_pkt, iphlen, sh,
5442 init_chk->init.initiate_tag, op_err, vrf_id, port);
5445 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
5447 /* No memory, INIT timer will re-attempt. */
5449 sctp_m_freem(op_err);
5452 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
5454 /* the time I built cookie */
5455 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5457 /* populate any tie tags */
5459 /* unlock before tag selections */
5460 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5461 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5462 stc.cookie_life = asoc->cookie_life;
5463 net = asoc->primary_destination;
5465 stc.tie_tag_my_vtag = 0;
5466 stc.tie_tag_peer_vtag = 0;
5467 /* life I will award this cookie */
5468 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5471 /* copy in the ports for later check */
5472 stc.myport = sh->dest_port;
5473 stc.peerport = sh->src_port;
5476 * If we wanted to honor cookie life extentions, we would add to
5477 * stc.cookie_life. For now we should NOT honor any extension
5479 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5480 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5481 struct inpcb *in_inp;
5483 /* Its a V6 socket */
5484 in_inp = (struct inpcb *)inp;
5485 stc.ipv6_addr_legal = 1;
5486 /* Now look at the binding flag to see if V4 will be legal */
5487 if (SCTP_IPV6_V6ONLY(in_inp) == 0) {
5488 stc.ipv4_addr_legal = 1;
5490 /* V4 addresses are NOT legal on the association */
5491 stc.ipv4_addr_legal = 0;
5494 /* Its a V4 socket, no - V6 */
5495 stc.ipv4_addr_legal = 1;
5496 stc.ipv6_addr_legal = 0;
5499 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5504 /* now for scope setup */
5505 memset((caddr_t)&store, 0, sizeof(store));
5506 memset((caddr_t)&store1, 0, sizeof(store1));
5509 to_sin = &store1.sin;
5513 to_sin6 = &store1.sin6;
5515 iph = mtod(init_pkt, struct ip *);
5516 /* establish the to_addr's */
5517 switch (iph->ip_v) {
5520 to_sin->sin_port = sh->dest_port;
5521 to_sin->sin_family = AF_INET;
5522 to_sin->sin_len = sizeof(struct sockaddr_in);
5523 to_sin->sin_addr = iph->ip_dst;
5527 case IPV6_VERSION >> 4:
5528 ip6 = mtod(init_pkt, struct ip6_hdr *);
5529 to_sin6->sin6_addr = ip6->ip6_dst;
5530 to_sin6->sin6_scope_id = 0;
5531 to_sin6->sin6_port = sh->dest_port;
5532 to_sin6->sin6_family = AF_INET6;
5533 to_sin6->sin6_len = sizeof(struct sockaddr_in6);
5542 to = (struct sockaddr *)&store;
5543 switch (iph->ip_v) {
5547 sin->sin_family = AF_INET;
5548 sin->sin_len = sizeof(struct sockaddr_in);
5549 sin->sin_port = sh->src_port;
5550 sin->sin_addr = iph->ip_src;
5551 /* lookup address */
5552 stc.address[0] = sin->sin_addr.s_addr;
5556 stc.addr_type = SCTP_IPV4_ADDRESS;
5557 /* local from address */
5558 stc.laddress[0] = to_sin->sin_addr.s_addr;
5559 stc.laddress[1] = 0;
5560 stc.laddress[2] = 0;
5561 stc.laddress[3] = 0;
5562 stc.laddr_type = SCTP_IPV4_ADDRESS;
5563 /* scope_id is only for v6 */
5565 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5566 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
5571 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5572 /* Must use the address in this case */
5573 if (sctp_is_address_on_local_host((struct sockaddr *)sin, vrf_id)) {
5574 stc.loopback_scope = 1;
5577 stc.local_scope = 0;
5583 case IPV6_VERSION >> 4:
5585 ip6 = mtod(init_pkt, struct ip6_hdr *);
5586 sin6->sin6_family = AF_INET6;
5587 sin6->sin6_len = sizeof(struct sockaddr_in6);
5588 sin6->sin6_port = sh->src_port;
5589 sin6->sin6_addr = ip6->ip6_src;
5590 /* lookup address */
5591 memcpy(&stc.address, &sin6->sin6_addr,
5592 sizeof(struct in6_addr));
5593 sin6->sin6_scope_id = 0;
5594 stc.addr_type = SCTP_IPV6_ADDRESS;
5596 if (sctp_is_address_on_local_host((struct sockaddr *)sin6, vrf_id)) {
5598 * FIX ME: does this have scope from
5601 (void)sa6_recoverscope(sin6);
5602 stc.scope_id = sin6->sin6_scope_id;
5603 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
5604 stc.loopback_scope = 1;
5605 stc.local_scope = 0;
5608 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
5610 * If the new destination is a
5611 * LINK_LOCAL we must have common
5612 * both site and local scope. Don't
5613 * set local scope though since we
5614 * must depend on the source to be
5615 * added implicitly. We cannot
5616 * assure just because we share one
5617 * link that all links are common.
5619 stc.local_scope = 0;
5623 * we start counting for the private
5624 * address stuff at 1. since the
5625 * link local we source from won't
5626 * show up in our scoped count.
5630 * pull out the scope_id from
5634 * FIX ME: does this have scope from
5637 (void)sa6_recoverscope(sin6);
5638 stc.scope_id = sin6->sin6_scope_id;
5639 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
5640 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
5642 * If the new destination is
5643 * SITE_LOCAL then we must have site
5648 memcpy(&stc.laddress, &to_sin6->sin6_addr, sizeof(struct in6_addr));
5649 stc.laddr_type = SCTP_IPV6_ADDRESS;
5659 /* set the scope per the existing tcb */
5662 struct sctp_nets *lnet;
5666 stc.loopback_scope = asoc->loopback_scope;
5667 stc.ipv4_scope = asoc->ipv4_local_scope;
5668 stc.site_scope = asoc->site_scope;
5669 stc.local_scope = asoc->local_scope;
5671 /* Why do we not consider IPv4 LL addresses? */
5672 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5673 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5674 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5676 * if we have a LL address, start
5684 /* use the net pointer */
5685 to = (struct sockaddr *)&net->ro._l_addr;
5686 switch (to->sa_family) {
5689 sin = (struct sockaddr_in *)to;
5690 stc.address[0] = sin->sin_addr.s_addr;
5694 stc.addr_type = SCTP_IPV4_ADDRESS;
5695 if (net->src_addr_selected == 0) {
5697 * strange case here, the INIT should have
5698 * did the selection.
5700 net->ro._s_addr = sctp_source_address_selection(inp,
5701 stcb, (sctp_route_t *) & net->ro,
5703 if (net->ro._s_addr == NULL)
5706 net->src_addr_selected = 1;
5709 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5710 stc.laddress[1] = 0;
5711 stc.laddress[2] = 0;
5712 stc.laddress[3] = 0;
5713 stc.laddr_type = SCTP_IPV4_ADDRESS;
5714 /* scope_id is only for v6 */
5720 sin6 = (struct sockaddr_in6 *)to;
5721 memcpy(&stc.address, &sin6->sin6_addr,
5722 sizeof(struct in6_addr));
5723 stc.addr_type = SCTP_IPV6_ADDRESS;
5724 stc.scope_id = sin6->sin6_scope_id;
5725 if (net->src_addr_selected == 0) {
5727 * strange case here, the INIT should have
5728 * did the selection.
5730 net->ro._s_addr = sctp_source_address_selection(inp,
5731 stcb, (sctp_route_t *) & net->ro,
5733 if (net->ro._s_addr == NULL)
5736 net->src_addr_selected = 1;
5738 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5739 sizeof(struct in6_addr));
5740 stc.laddr_type = SCTP_IPV6_ADDRESS;
5745 /* Now lets put the SCTP header in place */
5746 initack = mtod(m, struct sctp_init_ack_chunk *);
5747 /* Save it off for quick ref */
5748 stc.peers_vtag = init_chk->init.initiate_tag;
5750 memcpy(stc.identification, SCTP_VERSION_STRING,
5751 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5752 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5753 /* now the chunk header */
5754 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5755 initack->ch.chunk_flags = 0;
5756 /* fill in later from mbuf we build */
5757 initack->ch.chunk_length = 0;
5758 /* place in my tag */
5759 if ((asoc != NULL) &&
5760 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5761 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5762 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5763 /* re-use the v-tags and init-seq here */
5764 initack->init.initiate_tag = htonl(asoc->my_vtag);
5765 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5767 uint32_t vtag, itsn;
5769 if (hold_inp_lock) {
5770 SCTP_INP_INCR_REF(inp);
5771 SCTP_INP_RUNLOCK(inp);
5774 atomic_add_int(&asoc->refcnt, 1);
5775 SCTP_TCB_UNLOCK(stcb);
5777 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5778 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5780 * Got a duplicate vtag on some guy behind a
5781 * nat make sure we don't use it.
5785 initack->init.initiate_tag = htonl(vtag);
5786 /* get a TSN to use too */
5787 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5788 initack->init.initial_tsn = htonl(itsn);
5789 SCTP_TCB_LOCK(stcb);
5790 atomic_add_int(&asoc->refcnt, -1);
5792 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5793 initack->init.initiate_tag = htonl(vtag);
5794 /* get a TSN to use too */
5795 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5797 if (hold_inp_lock) {
5798 SCTP_INP_RLOCK(inp);
5799 SCTP_INP_DECR_REF(inp);
5802 /* save away my tag to */
5803 stc.my_vtag = initack->init.initiate_tag;
5805 /* set up some of the credits. */
5806 so = inp->sctp_socket;
5808 /* memory problem */
5812 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5814 /* set what I want */
5815 his_limit = ntohs(init_chk->init.num_inbound_streams);
5816 /* choose what I want */
5818 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5819 i_want = asoc->streamoutcnt;
5821 i_want = inp->sctp_ep.pre_open_stream_count;
5824 i_want = inp->sctp_ep.pre_open_stream_count;
5826 if (his_limit < i_want) {
5827 /* I Want more :< */
5828 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5830 /* I can have what I want :> */
5831 initack->init.num_outbound_streams = htons(i_want);
5833 /* tell him his limt. */
5834 initack->init.num_inbound_streams =
5835 htons(inp->sctp_ep.max_open_streams_intome);
5837 /* adaptation layer indication parameter */
5838 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack));
5839 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5840 ali->ph.param_length = htons(sizeof(*ali));
5841 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
5842 SCTP_BUF_LEN(m) += sizeof(*ali);
5843 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
5846 if (((asoc != NULL) && (asoc->ecn_allowed == 1)) ||
5847 (inp->sctp_ecn_enable == 1)) {
5848 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
5849 ecn->ph.param_length = htons(sizeof(*ecn));
5850 SCTP_BUF_LEN(m) += sizeof(*ecn);
5852 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
5855 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
5857 /* And now tell the peer we do pr-sctp */
5858 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
5859 prsctp->ph.param_length = htons(sizeof(*prsctp));
5860 SCTP_BUF_LEN(m) += sizeof(*prsctp);
5862 /* Add NAT friendly parameter */
5863 struct sctp_paramhdr *ph;
5865 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5866 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5867 ph->param_length = htons(sizeof(struct sctp_paramhdr));
5868 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
5870 /* And now tell the peer we do all the extensions */
5871 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5872 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5874 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5875 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5876 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5877 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5878 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5879 if (!SCTP_BASE_SYSCTL(sctp_auth_disable))
5880 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5881 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
5882 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5883 p_len = sizeof(*pr_supported) + num_ext;
5884 pr_supported->ph.param_length = htons(p_len);
5885 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
5886 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5888 /* add authentication parameters */
5889 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
5890 struct sctp_auth_random *randp;
5891 struct sctp_auth_hmac_algo *hmacs;
5892 struct sctp_auth_chunk_list *chunks;
5893 uint16_t random_len;
5895 /* generate and add RANDOM parameter */
5896 random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5897 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5898 randp->ph.param_type = htons(SCTP_RANDOM);
5899 p_len = sizeof(*randp) + random_len;
5900 randp->ph.param_length = htons(p_len);
5901 SCTP_READ_RANDOM(randp->random_data, random_len);
5902 /* zero out any padding required */
5903 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
5904 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5906 /* add HMAC_ALGO parameter */
5907 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5908 p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5909 (uint8_t *) hmacs->hmac_ids);
5911 p_len += sizeof(*hmacs);
5912 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5913 hmacs->ph.param_length = htons(p_len);
5914 /* zero out any padding required */
5915 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
5916 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5918 /* add CHUNKS parameter */
5919 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5920 p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5921 chunks->chunk_types);
5923 p_len += sizeof(*chunks);
5924 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5925 chunks->ph.param_length = htons(p_len);
5926 /* zero out any padding required */
5927 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
5928 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5932 /* now the addresses */
5934 struct sctp_scoping scp;
5937 * To optimize this we could put the scoping stuff into a
5938 * structure and remove the individual uint8's from the stc
5939 * structure. Then we could just sifa in the address within
5940 * the stc.. but for now this is a quick hack to get the
5941 * address stuff teased apart.
5943 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5944 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5945 scp.loopback_scope = stc.loopback_scope;
5946 scp.ipv4_local_scope = stc.ipv4_scope;
5947 scp.local_scope = stc.local_scope;
5948 scp.site_scope = stc.site_scope;
5949 m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to);
5952 /* tack on the operational error if present */
5960 llen += SCTP_BUF_LEN(ol);
5961 ol = SCTP_BUF_NEXT(ol);
5964 /* must add a pad to the param */
5965 uint32_t cpthis = 0;
5968 padlen = 4 - (llen % 4);
5969 m_copyback(op_err, llen, padlen, (caddr_t)&cpthis);
5971 while (SCTP_BUF_NEXT(m_at) != NULL) {
5972 m_at = SCTP_BUF_NEXT(m_at);
5974 SCTP_BUF_NEXT(m_at) = op_err;
5975 while (SCTP_BUF_NEXT(m_at) != NULL) {
5976 m_at = SCTP_BUF_NEXT(m_at);
5979 /* pre-calulate the size and update pkt header and chunk header */
5981 for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5982 p_len += SCTP_BUF_LEN(m_tmp);
5983 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5984 /* m_tmp should now point to last one */
5989 /* Now we must build a cookie */
5990 m_cookie = sctp_add_cookie(inp, init_pkt, offset, m, 0, &stc, &signature);
5991 if (m_cookie == NULL) {
5992 /* memory problem */
5996 /* Now append the cookie to the end and update the space/size */
5997 SCTP_BUF_NEXT(m_tmp) = m_cookie;
5999 for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6000 p_len += SCTP_BUF_LEN(m_tmp);
6001 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6002 /* m_tmp should now point to last one */
6008 * Place in the size, but we don't include the last pad (if any) in
6011 initack->ch.chunk_length = htons(p_len);
6014 * Time to sign the cookie, we don't sign over the cookie signature
6015 * though thus we set trailer.
6017 (void)sctp_hmac_m(SCTP_HMAC,
6018 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6019 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6020 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6022 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6023 * here since the timer will drive a retranmission.
6026 if ((padval) && (mp_last)) {
6027 /* see my previous comments on mp_last */
6030 ret = sctp_add_pad_tombuf(mp_last, (4 - padval));
6032 /* Houston we have a problem, no space */
6038 if (stc.loopback_scope) {
6039 over_addr = &store1;
6044 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6046 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6047 port, SCTP_SO_NOT_LOCKED, over_addr, init_pkt);
6048 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6053 sctp_prune_prsctp(struct sctp_tcb *stcb,
6054 struct sctp_association *asoc,
6055 struct sctp_sndrcvinfo *srcv,
6059 struct sctp_tmit_chunk *chk, *nchk;
6061 SCTP_TCB_LOCK_ASSERT(stcb);
6062 if ((asoc->peer_supports_prsctp) &&
6063 (asoc->sent_queue_cnt_removeable > 0)) {
6064 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6066 * Look for chunks marked with the PR_SCTP flag AND
6067 * the buffer space flag. If the one being sent is
6068 * equal or greater priority then purge the old one
6069 * and free some space.
6071 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6073 * This one is PR-SCTP AND buffer space
6076 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6078 * Lower numbers equates to higher
6079 * priority so if the one we are
6080 * looking at has a larger or equal
6081 * priority we want to drop the data
6082 * and NOT retransmit it.
6086 * We release the book_size
6087 * if the mbuf is here
6092 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6093 cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT;
6095 cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT;
6096 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6099 freed_spc += ret_spc;
6100 if (freed_spc >= dataout) {
6103 } /* if chunk was present */
6104 } /* if of sufficent priority */
6105 } /* if chunk has enabled */
6106 } /* tailqforeach */
6108 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6109 /* Here we must move to the sent queue and mark */
6110 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6111 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6114 * We release the book_size
6115 * if the mbuf is here
6119 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6120 SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT,
6123 freed_spc += ret_spc;
6124 if (freed_spc >= dataout) {
6127 } /* end if chk->data */
6128 } /* end if right class */
6129 } /* end if chk pr-sctp */
6130 } /* tailqforeachsafe (chk) */
6131 } /* if enabled in asoc */
6135 sctp_get_frag_point(struct sctp_tcb *stcb,
6136 struct sctp_association *asoc)
6141 * For endpoints that have both v6 and v4 addresses we must reserve
6142 * room for the ipv6 header, for those that are only dealing with V4
6143 * we use a larger frag point.
6145 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6146 ovh = SCTP_MED_OVERHEAD;
6148 ovh = SCTP_MED_V4_OVERHEAD;
6151 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6152 siz = asoc->smallest_mtu - ovh;
6154 siz = (stcb->asoc.sctp_frag_point - ovh);
6156 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6158 /* A data chunk MUST fit in a cluster */
6159 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6162 /* adjust for an AUTH chunk if DATA requires auth */
6163 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6164 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6167 /* make it an even word boundary please */
6174 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6178 * We assume that the user wants PR_SCTP_TTL if the user provides a
6179 * positive lifetime but does not specify any PR_SCTP policy. This
6180 * is a BAD assumption and causes problems at least with the
6181 * U-Vancovers MPI folks. I will change this to be no policy means
6184 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6185 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6190 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6191 case CHUNK_FLAGS_PR_SCTP_BUF:
6193 * Time to live is a priority stored in tv_sec when doing
6194 * the buffer drop thing.
6196 sp->ts.tv_sec = sp->timetolive;
6199 case CHUNK_FLAGS_PR_SCTP_TTL:
6203 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6204 tv.tv_sec = sp->timetolive / 1000;
6205 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6207 * TODO sctp_constants.h needs alternative time
6208 * macros when _KERNEL is undefined.
6210 timevaladd(&sp->ts, &tv);
6213 case CHUNK_FLAGS_PR_SCTP_RTX:
6215 * Time to live is a the number or retransmissions stored in
6218 sp->ts.tv_sec = sp->timetolive;
6222 SCTPDBG(SCTP_DEBUG_USRREQ1,
6223 "Unknown PR_SCTP policy %u.\n",
6224 PR_SCTP_POLICY(sp->sinfo_flags));
6230 sctp_msg_append(struct sctp_tcb *stcb,
6231 struct sctp_nets *net,
6233 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6235 int error = 0, holds_lock;
6237 struct sctp_stream_queue_pending *sp = NULL;
6238 struct sctp_stream_out *strm;
6241 * Given an mbuf chain, put it into the association send queue and
6242 * place it on the wheel
6244 holds_lock = hold_stcb_lock;
6245 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6246 /* Invalid stream number */
6247 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6251 if ((stcb->asoc.stream_locked) &&
6252 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6253 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6257 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6258 /* Now can we send this? */
6259 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6260 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6261 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6262 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6263 /* got data while shutting down */
6264 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6268 sctp_alloc_a_strmoq(stcb, sp);
6270 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6274 sp->sinfo_flags = srcv->sinfo_flags;
6275 sp->timetolive = srcv->sinfo_timetolive;
6276 sp->ppid = srcv->sinfo_ppid;
6277 sp->context = srcv->sinfo_context;
6279 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6281 atomic_add_int(&sp->net->ref_count, 1);
6285 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6286 sp->stream = srcv->sinfo_stream;
6287 sp->msg_is_complete = 1;
6288 sp->sender_all_done = 1;
6291 sp->tail_mbuf = NULL;
6292 sctp_set_prsctp_policy(sp);
6294 * We could in theory (for sendall) sifa the length in, but we would
6295 * still have to hunt through the chain since we need to setup the
6299 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6300 if (SCTP_BUF_NEXT(at) == NULL)
6302 sp->length += SCTP_BUF_LEN(at);
6304 if (srcv->sinfo_keynumber_valid) {
6305 sp->auth_keyid = srcv->sinfo_keynumber;
6307 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6309 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6310 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6311 sp->holds_key_ref = 1;
6313 SCTP_TCB_SEND_LOCK(stcb);
6314 sctp_snd_sb_alloc(stcb, sp->length);
6315 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6316 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6317 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
6318 sp->strseq = strm->next_sequence_sent;
6319 strm->next_sequence_sent++;
6321 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6323 SCTP_TCB_SEND_UNLOCK(stcb);
6332 static struct mbuf *
6333 sctp_copy_mbufchain(struct mbuf *clonechain,
6334 struct mbuf *outchain,
6335 struct mbuf **endofchain,
6338 uint8_t copy_by_ref)
6341 struct mbuf *appendchain;
6345 if (endofchain == NULL) {
6349 sctp_m_freem(outchain);
6352 if (can_take_mbuf) {
6353 appendchain = clonechain;
6356 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6358 /* Its not in a cluster */
6359 if (*endofchain == NULL) {
6360 /* lets get a mbuf cluster */
6361 if (outchain == NULL) {
6362 /* This is the general case */
6364 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6365 if (outchain == NULL) {
6368 SCTP_BUF_LEN(outchain) = 0;
6369 *endofchain = outchain;
6370 /* get the prepend space */
6371 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6374 * We really should not get a NULL
6380 if (SCTP_BUF_NEXT(m) == NULL) {
6384 m = SCTP_BUF_NEXT(m);
6387 if (*endofchain == NULL) {
6389 * huh, TSNH XXX maybe we
6392 sctp_m_freem(outchain);
6396 /* get the new end of length */
6397 len = M_TRAILINGSPACE(*endofchain);
6399 /* how much is left at the end? */
6400 len = M_TRAILINGSPACE(*endofchain);
6402 /* Find the end of the data, for appending */
6403 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6405 /* Now lets copy it out */
6406 if (len >= sizeofcpy) {
6407 /* It all fits, copy it in */
6408 m_copydata(clonechain, 0, sizeofcpy, cp);
6409 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6411 /* fill up the end of the chain */
6413 m_copydata(clonechain, 0, len, cp);
6414 SCTP_BUF_LEN((*endofchain)) += len;
6415 /* now we need another one */
6418 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6423 SCTP_BUF_NEXT((*endofchain)) = m;
6425 cp = mtod((*endofchain), caddr_t);
6426 m_copydata(clonechain, len, sizeofcpy, cp);
6427 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6431 /* copy the old fashion way */
6432 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_DONTWAIT);
6433 #ifdef SCTP_MBUF_LOGGING
6434 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6439 if (SCTP_BUF_IS_EXTENDED(mat)) {
6440 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6442 mat = SCTP_BUF_NEXT(mat);
6448 if (appendchain == NULL) {
6451 sctp_m_freem(outchain);
6455 /* tack on to the end */
6456 if (*endofchain != NULL) {
6457 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6461 if (SCTP_BUF_NEXT(m) == NULL) {
6462 SCTP_BUF_NEXT(m) = appendchain;
6465 m = SCTP_BUF_NEXT(m);
6469 * save off the end and update the end-chain postion
6473 if (SCTP_BUF_NEXT(m) == NULL) {
6477 m = SCTP_BUF_NEXT(m);
6481 /* save off the end and update the end-chain postion */
6484 if (SCTP_BUF_NEXT(m) == NULL) {
6488 m = SCTP_BUF_NEXT(m);
6490 return (appendchain);
6495 sctp_med_chunk_output(struct sctp_inpcb *inp,
6496 struct sctp_tcb *stcb,
6497 struct sctp_association *asoc,
6500 int control_only, int from_where,
6501 struct timeval *now, int *now_filled, int frag_point, int so_locked
6502 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6508 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6511 struct sctp_copy_all *ca;
6514 int added_control = 0;
6515 int un_sent, do_chunk_output = 1;
6516 struct sctp_association *asoc;
6517 struct sctp_nets *net;
6519 ca = (struct sctp_copy_all *)ptr;
6520 if (ca->m == NULL) {
6523 if (ca->inp != inp) {
6527 if ((ca->m) && ca->sndlen) {
6528 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_DONTWAIT);
6530 /* can't copy so we are done */
6534 #ifdef SCTP_MBUF_LOGGING
6535 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6540 if (SCTP_BUF_IS_EXTENDED(mat)) {
6541 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6543 mat = SCTP_BUF_NEXT(mat);
6550 SCTP_TCB_LOCK_ASSERT(stcb);
6551 if (stcb->asoc.alternate) {
6552 net = stcb->asoc.alternate;
6554 net = stcb->asoc.primary_destination;
6556 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6557 /* Abort this assoc with m as the user defined reason */
6559 struct sctp_paramhdr *ph;
6561 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_DONTWAIT);
6563 ph = mtod(m, struct sctp_paramhdr *);
6564 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6565 ph->param_length = htons(ca->sndlen);
6568 * We add one here to keep the assoc from
6569 * dis-appearing on us.
6571 atomic_add_int(&stcb->asoc.refcnt, 1);
6572 sctp_abort_an_association(inp, stcb,
6573 SCTP_RESPONSE_TO_USER_REQ,
6574 m, SCTP_SO_NOT_LOCKED);
6576 * sctp_abort_an_association calls sctp_free_asoc()
6577 * free association will NOT free it since we
6578 * incremented the refcnt .. we do this to prevent
6579 * it being freed and things getting tricky since we
6580 * could end up (from free_asoc) calling inpcb_free
6581 * which would get a recursive lock call to the
6582 * iterator lock.. But as a consequence of that the
6583 * stcb will return to us un-locked.. since
6584 * free_asoc returns with either no TCB or the TCB
6585 * unlocked, we must relock.. to unlock in the
6586 * iterator timer :-0
6588 SCTP_TCB_LOCK(stcb);
6589 atomic_add_int(&stcb->asoc.refcnt, -1);
6590 goto no_chunk_output;
6594 ret = sctp_msg_append(stcb, net, m,
6598 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6599 /* shutdown this assoc */
6602 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6604 if (TAILQ_EMPTY(&asoc->send_queue) &&
6605 TAILQ_EMPTY(&asoc->sent_queue) &&
6607 if (asoc->locked_on_sending) {
6611 * there is nothing queued to send, so I'm
6614 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6615 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6616 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6618 * only send SHUTDOWN the first time
6621 sctp_send_shutdown(stcb, net);
6622 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6623 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6625 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6626 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6627 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6629 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6630 asoc->primary_destination);
6632 do_chunk_output = 0;
6636 * we still got (or just got) data to send,
6637 * so set SHUTDOWN_PENDING
6640 * XXX sockets draft says that SCTP_EOF
6641 * should be sent with no data. currently,
6642 * we will allow user data to be sent first
6643 * and move to SHUTDOWN-PENDING
6645 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6646 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6647 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6648 if (asoc->locked_on_sending) {
6650 * Locked to send out the
6653 struct sctp_stream_queue_pending *sp;
6655 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6657 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6658 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6661 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6662 if (TAILQ_EMPTY(&asoc->send_queue) &&
6663 TAILQ_EMPTY(&asoc->sent_queue) &&
6664 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6666 atomic_add_int(&stcb->asoc.refcnt, 1);
6667 sctp_abort_an_association(stcb->sctp_ep, stcb,
6668 SCTP_RESPONSE_TO_USER_REQ,
6669 NULL, SCTP_SO_NOT_LOCKED);
6670 atomic_add_int(&stcb->asoc.refcnt, -1);
6671 goto no_chunk_output;
6673 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6674 asoc->primary_destination);
6680 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6681 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6683 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6684 (stcb->asoc.total_flight > 0) &&
6685 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))
6687 do_chunk_output = 0;
6689 if (do_chunk_output)
6690 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6691 else if (added_control) {
6692 int num_out = 0, reason = 0, now_filled = 0;
6696 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6697 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6698 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6709 sctp_sendall_completes(void *ptr, uint32_t val)
6711 struct sctp_copy_all *ca;
6713 ca = (struct sctp_copy_all *)ptr;
6715 * Do a notify here? Kacheong suggests that the notify be done at
6716 * the send time.. so you would push up a notification if any send
6717 * failed. Don't know if this is feasable since the only failures we
6718 * have is "memory" related and if you cannot get an mbuf to send
6719 * the data you surely can't get an mbuf to send up to notify the
6720 * user you can't send the data :->
6723 /* now free everything */
6724 sctp_m_freem(ca->m);
6725 SCTP_FREE(ca, SCTP_M_COPYAL);
6729 #define MC_ALIGN(m, len) do { \
6730 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \
6735 static struct mbuf *
6736 sctp_copy_out_all(struct uio *uio, int len)
6738 struct mbuf *ret, *at;
6739 int left, willcpy, cancpy, error;
6741 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAIT, 1, MT_DATA);
6747 SCTP_BUF_LEN(ret) = 0;
6748 /* save space for the data chunk header */
6749 cancpy = M_TRAILINGSPACE(ret);
6750 willcpy = min(cancpy, left);
6753 /* Align data to the end */
6754 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6760 SCTP_BUF_LEN(at) = willcpy;
6761 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6764 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAIT, 1, MT_DATA);
6765 if (SCTP_BUF_NEXT(at) == NULL) {
6768 at = SCTP_BUF_NEXT(at);
6769 SCTP_BUF_LEN(at) = 0;
6770 cancpy = M_TRAILINGSPACE(at);
6771 willcpy = min(cancpy, left);
6778 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6779 struct sctp_sndrcvinfo *srcv)
6782 struct sctp_copy_all *ca;
6784 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6788 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6791 memset(ca, 0, sizeof(struct sctp_copy_all));
6795 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6798 * take off the sendall flag, it would be bad if we failed to do
6801 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6802 /* get length and mbuf chain */
6804 ca->sndlen = uio->uio_resid;
6805 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6806 if (ca->m == NULL) {
6807 SCTP_FREE(ca, SCTP_M_COPYAL);
6808 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6812 /* Gather the length of the send */
6818 ca->sndlen += SCTP_BUF_LEN(m);
6819 m = SCTP_BUF_NEXT(m);
6823 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6824 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6825 SCTP_ASOC_ANY_STATE,
6827 sctp_sendall_completes, inp, 1);
6829 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6830 SCTP_FREE(ca, SCTP_M_COPYAL);
6831 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6839 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6841 struct sctp_tmit_chunk *chk, *nchk;
6843 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6844 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6845 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6847 sctp_m_freem(chk->data);
6850 asoc->ctrl_queue_cnt--;
6851 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6857 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6859 struct sctp_association *asoc;
6860 struct sctp_tmit_chunk *chk, *nchk;
6861 struct sctp_asconf_chunk *acp;
6864 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6865 /* find SCTP_ASCONF chunk in queue */
6866 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6868 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6869 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6874 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6876 sctp_m_freem(chk->data);
6879 asoc->ctrl_queue_cnt--;
6880 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6887 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6888 struct sctp_association *asoc,
6889 struct sctp_tmit_chunk **data_list,
6891 struct sctp_nets *net)
6894 struct sctp_tmit_chunk *tp1;
6896 for (i = 0; i < bundle_at; i++) {
6897 /* off of the send queue */
6898 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6899 asoc->send_queue_cnt--;
6902 * Any chunk NOT 0 you zap the time chunk 0 gets
6903 * zapped or set based on if a RTO measurment is
6906 data_list[i]->do_rtt = 0;
6909 data_list[i]->sent_rcv_time = net->last_sent_time;
6910 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6911 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6912 if (data_list[i]->whoTo == NULL) {
6913 data_list[i]->whoTo = net;
6914 atomic_add_int(&net->ref_count, 1);
6916 /* on to the sent queue */
6917 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6918 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6919 struct sctp_tmit_chunk *tpp;
6921 /* need to move back */
6923 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6925 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6929 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6932 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6934 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6939 /* This does not lower until the cum-ack passes it */
6940 asoc->sent_queue_cnt++;
6941 if ((asoc->peers_rwnd <= 0) &&
6942 (asoc->total_flight == 0) &&
6944 /* Mark the chunk as being a window probe */
6945 SCTP_STAT_INCR(sctps_windowprobed);
6947 #ifdef SCTP_AUDITING_ENABLED
6948 sctp_audit_log(0xC2, 3);
6950 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6951 data_list[i]->snd_count = 1;
6952 data_list[i]->rec.data.chunk_was_revoked = 0;
6953 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6954 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6955 data_list[i]->whoTo->flight_size,
6956 data_list[i]->book_size,
6957 (uintptr_t) data_list[i]->whoTo,
6958 data_list[i]->rec.data.TSN_seq);
6960 sctp_flight_size_increase(data_list[i]);
6961 sctp_total_flight_increase(stcb, data_list[i]);
6962 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6963 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6964 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6966 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6967 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6968 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6969 /* SWS sender side engages */
6970 asoc->peers_rwnd = 0;
6973 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6974 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
6979 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
6980 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6985 struct sctp_tmit_chunk *chk, *nchk;
6987 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6988 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
6989 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
6990 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
6991 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
6992 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
6993 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
6994 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
6995 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
6996 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
6997 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
6998 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
6999 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7000 /* Stray chunks must be cleaned up */
7002 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7004 sctp_m_freem(chk->data);
7007 asoc->ctrl_queue_cnt--;
7008 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7009 asoc->fwd_tsn_cnt--;
7010 sctp_free_a_chunk(stcb, chk, so_locked);
7011 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7012 /* special handling, we must look into the param */
7013 if (chk != asoc->str_reset) {
7014 goto clean_up_anyway;
7022 sctp_can_we_split_this(struct sctp_tcb *stcb,
7024 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7027 * Make a decision on if I should split a msg into multiple parts.
7028 * This is only asked of incomplete messages.
7032 * If we are doing EEOR we need to always send it if its the
7033 * entire thing, since it might be all the guy is putting in
7036 if (goal_mtu >= length) {
7038 * If we have data outstanding,
7039 * we get another chance when the sack
7040 * arrives to transmit - wait for more data
7042 if (stcb->asoc.total_flight == 0) {
7044 * If nothing is in flight, we zero the
7052 /* You can fill the rest */
7057 * For those strange folk that make the send buffer
7058 * smaller than our fragmentation point, we can't
7059 * get a full msg in so we have to allow splitting.
7061 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7064 if ((length <= goal_mtu) ||
7065 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7066 /* Sub-optimial residual don't split in non-eeor mode. */
7070 * If we reach here length is larger than the goal_mtu. Do we wish
7071 * to split it for the sake of packet putting together?
7073 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7074 /* Its ok to split it */
7075 return (min(goal_mtu, frag_point));
7077 /* Nope, can't split */
7083 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7084 struct sctp_stream_out *strq,
7086 uint32_t frag_point,
7092 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7097 /* Move from the stream to the send_queue keeping track of the total */
7098 struct sctp_association *asoc;
7099 struct sctp_stream_queue_pending *sp;
7100 struct sctp_tmit_chunk *chk;
7101 struct sctp_data_chunk *dchkh;
7102 uint32_t to_move, length;
7103 uint8_t rcv_flags = 0;
7105 uint8_t send_lock_up = 0;
7107 SCTP_TCB_LOCK_ASSERT(stcb);
7110 /* sa_ignore FREED_MEMORY */
7111 sp = TAILQ_FIRST(&strq->outqueue);
7114 if (send_lock_up == 0) {
7115 SCTP_TCB_SEND_LOCK(stcb);
7118 sp = TAILQ_FIRST(&strq->outqueue);
7122 if (strq->last_msg_incomplete) {
7123 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7125 strq->last_msg_incomplete);
7126 strq->last_msg_incomplete = 0;
7130 SCTP_TCB_SEND_UNLOCK(stcb);
7135 if ((sp->msg_is_complete) && (sp->length == 0)) {
7136 if (sp->sender_all_done) {
7138 * We are doing differed cleanup. Last time through
7139 * when we took all the data the sender_all_done was
7142 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7143 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7144 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7145 sp->sender_all_done,
7147 sp->msg_is_complete,
7151 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7152 SCTP_TCB_SEND_LOCK(stcb);
7155 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7156 TAILQ_REMOVE(&strq->outqueue, sp, next);
7157 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7159 sctp_free_remote_addr(sp->net);
7163 sctp_m_freem(sp->data);
7166 sctp_free_a_strmoq(stcb, sp, so_locked);
7167 /* we can't be locked to it */
7169 stcb->asoc.locked_on_sending = NULL;
7171 SCTP_TCB_SEND_UNLOCK(stcb);
7174 /* back to get the next msg */
7178 * sender just finished this but still holds a
7187 /* is there some to get */
7188 if (sp->length == 0) {
7194 } else if (sp->discard_rest) {
7195 if (send_lock_up == 0) {
7196 SCTP_TCB_SEND_LOCK(stcb);
7199 /* Whack down the size */
7200 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7201 if ((stcb->sctp_socket != NULL) && \
7202 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7203 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7204 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7207 sctp_m_freem(sp->data);
7209 sp->tail_mbuf = NULL;
7219 some_taken = sp->some_taken;
7220 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7221 sp->msg_is_complete = 1;
7224 length = sp->length;
7225 if (sp->msg_is_complete) {
7226 /* The message is complete */
7227 to_move = min(length, frag_point);
7228 if (to_move == length) {
7229 /* All of it fits in the MTU */
7230 if (sp->some_taken) {
7231 rcv_flags |= SCTP_DATA_LAST_FRAG;
7232 sp->put_last_out = 1;
7234 rcv_flags |= SCTP_DATA_NOT_FRAG;
7235 sp->put_last_out = 1;
7238 /* Not all of it fits, we fragment */
7239 if (sp->some_taken == 0) {
7240 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7245 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7248 * We use a snapshot of length in case it
7249 * is expanding during the compare.
7254 if (to_move >= llen) {
7256 if (send_lock_up == 0) {
7258 * We are taking all of an incomplete msg
7259 * thus we need a send lock.
7261 SCTP_TCB_SEND_LOCK(stcb);
7263 if (sp->msg_is_complete) {
7265 * the sender finished the
7272 if (sp->some_taken == 0) {
7273 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7277 /* Nothing to take. */
7278 if (sp->some_taken) {
7287 /* If we reach here, we can copy out a chunk */
7288 sctp_alloc_a_chunk(stcb, chk);
7290 /* No chunk memory */
7296 * Setup for unordered if needed by looking at the user sent info
7299 if (sp->sinfo_flags & SCTP_UNORDERED) {
7300 rcv_flags |= SCTP_DATA_UNORDERED;
7302 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7303 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7304 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7306 /* clear out the chunk before setting up */
7307 memset(chk, 0, sizeof(*chk));
7308 chk->rec.data.rcv_flags = rcv_flags;
7310 if (to_move >= length) {
7311 /* we think we can steal the whole thing */
7312 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7313 SCTP_TCB_SEND_LOCK(stcb);
7316 if (to_move < sp->length) {
7317 /* bail, it changed */
7320 chk->data = sp->data;
7321 chk->last_mbuf = sp->tail_mbuf;
7322 /* register the stealing */
7323 sp->data = sp->tail_mbuf = NULL;
7328 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_DONTWAIT);
7329 chk->last_mbuf = NULL;
7330 if (chk->data == NULL) {
7331 sp->some_taken = some_taken;
7332 sctp_free_a_chunk(stcb, chk, so_locked);
7337 #ifdef SCTP_MBUF_LOGGING
7338 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7343 if (SCTP_BUF_IS_EXTENDED(mat)) {
7344 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
7346 mat = SCTP_BUF_NEXT(mat);
7350 /* Pull off the data */
7351 m_adj(sp->data, to_move);
7352 /* Now lets work our way down and compact it */
7354 while (m && (SCTP_BUF_LEN(m) == 0)) {
7355 sp->data = SCTP_BUF_NEXT(m);
7356 SCTP_BUF_NEXT(m) = NULL;
7357 if (sp->tail_mbuf == m) {
7359 * Freeing tail? TSNH since
7360 * we supposedly were taking less
7361 * than the sp->length.
7364 panic("Huh, freing tail? - TSNH");
7366 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7367 sp->tail_mbuf = sp->data = NULL;
7376 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7377 chk->copy_by_ref = 1;
7379 chk->copy_by_ref = 0;
7382 * get last_mbuf and counts of mb useage This is ugly but hopefully
7383 * its only one mbuf.
7385 if (chk->last_mbuf == NULL) {
7386 chk->last_mbuf = chk->data;
7387 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7388 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7391 if (to_move > length) {
7392 /*- This should not happen either
7393 * since we always lower to_move to the size
7394 * of sp->length if its larger.
7397 panic("Huh, how can to_move be larger?");
7399 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7403 atomic_subtract_int(&sp->length, to_move);
7405 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7406 /* Not enough room for a chunk header, get some */
7409 m = sctp_get_mbuf_for_msg(1, 0, M_DONTWAIT, 0, MT_DATA);
7412 * we're in trouble here. _PREPEND below will free
7413 * all the data if there is no leading space, so we
7414 * must put the data back and restore.
7416 if (send_lock_up == 0) {
7417 SCTP_TCB_SEND_LOCK(stcb);
7420 if (chk->data == NULL) {
7421 /* unsteal the data */
7422 sp->data = chk->data;
7423 sp->tail_mbuf = chk->last_mbuf;
7427 /* reassemble the data */
7429 sp->data = chk->data;
7430 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7432 sp->some_taken = some_taken;
7433 atomic_add_int(&sp->length, to_move);
7436 sctp_free_a_chunk(stcb, chk, so_locked);
7440 SCTP_BUF_LEN(m) = 0;
7441 SCTP_BUF_NEXT(m) = chk->data;
7443 M_ALIGN(chk->data, 4);
7446 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT);
7447 if (chk->data == NULL) {
7448 /* HELP, TSNH since we assured it would not above? */
7450 panic("prepend failes HELP?");
7452 SCTP_PRINTF("prepend fails HELP?\n");
7453 sctp_free_a_chunk(stcb, chk, so_locked);
7459 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7460 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7461 chk->book_size_scale = 0;
7462 chk->sent = SCTP_DATAGRAM_UNSENT;
7465 chk->asoc = &stcb->asoc;
7466 chk->pad_inplace = 0;
7467 chk->no_fr_allowed = 0;
7468 chk->rec.data.stream_seq = sp->strseq;
7469 chk->rec.data.stream_number = sp->stream;
7470 chk->rec.data.payloadtype = sp->ppid;
7471 chk->rec.data.context = sp->context;
7472 chk->rec.data.doing_fast_retransmit = 0;
7474 chk->rec.data.timetodrop = sp->ts;
7475 chk->flags = sp->act_flags;
7478 chk->whoTo = sp->net;
7479 atomic_add_int(&chk->whoTo->ref_count, 1);
7483 if (sp->holds_key_ref) {
7484 chk->auth_keyid = sp->auth_keyid;
7485 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7486 chk->holds_key_ref = 1;
7488 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7489 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7490 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7491 (uintptr_t) stcb, sp->length,
7492 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7493 chk->rec.data.TSN_seq);
7495 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7497 * Put the rest of the things in place now. Size was done earlier in
7498 * previous loop prior to padding.
7501 #ifdef SCTP_ASOCLOG_OF_TSNS
7502 SCTP_TCB_LOCK_ASSERT(stcb);
7503 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7504 asoc->tsn_out_at = 0;
7505 asoc->tsn_out_wrapped = 1;
7507 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7508 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7509 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7510 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7511 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7512 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7513 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7514 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7518 dchkh->ch.chunk_type = SCTP_DATA;
7519 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7520 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7521 dchkh->dp.stream_id = htons(strq->stream_no);
7522 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7523 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7524 dchkh->ch.chunk_length = htons(chk->send_size);
7525 /* Now advance the chk->send_size by the actual pad needed. */
7526 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7531 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7532 if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) {
7533 chk->pad_inplace = 1;
7535 if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) {
7536 /* pad added an mbuf */
7537 chk->last_mbuf = lm;
7539 chk->send_size += pads;
7541 /* We only re-set the policy if it is on */
7542 if (sp->pr_sctp_on) {
7543 sctp_set_prsctp_policy(sp);
7544 asoc->pr_sctp_cnt++;
7545 chk->pr_sctp_on = 1;
7547 chk->pr_sctp_on = 0;
7549 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7550 /* All done pull and kill the message */
7551 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7552 if (sp->put_last_out == 0) {
7553 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7554 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7555 sp->sender_all_done,
7557 sp->msg_is_complete,
7561 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7562 SCTP_TCB_SEND_LOCK(stcb);
7565 TAILQ_REMOVE(&strq->outqueue, sp, next);
7566 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7568 sctp_free_remote_addr(sp->net);
7572 sctp_m_freem(sp->data);
7575 sctp_free_a_strmoq(stcb, sp, so_locked);
7577 /* we can't be locked to it */
7579 stcb->asoc.locked_on_sending = NULL;
7581 /* more to go, we are locked */
7584 asoc->chunks_on_out_queue++;
7585 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7586 asoc->send_queue_cnt++;
7589 SCTP_TCB_SEND_UNLOCK(stcb);
7597 sctp_fill_outqueue(struct sctp_tcb *stcb,
7598 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7599 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7604 struct sctp_association *asoc;
7605 struct sctp_stream_out *strq, *strqn;
7606 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7609 SCTP_TCB_LOCK_ASSERT(stcb);
7612 if (net->ro._l_addr.sin6.sin6_family == AF_INET6) {
7613 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7615 /* ?? not sure what else to do */
7616 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7619 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7621 /* Need an allowance for the data chunk header too */
7622 goal_mtu -= sizeof(struct sctp_data_chunk);
7624 /* must make even word boundary */
7625 goal_mtu &= 0xfffffffc;
7626 if (asoc->locked_on_sending) {
7627 /* We are stuck on one stream until the message completes. */
7628 strq = asoc->locked_on_sending;
7631 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7635 while ((goal_mtu > 0) && strq) {
7638 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7639 &giveup, eeor_mode, &bail, so_locked);
7641 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7644 asoc->locked_on_sending = strq;
7645 if ((moved_how_much == 0) || (giveup) || bail)
7646 /* no more to move for now */
7649 asoc->locked_on_sending = NULL;
7650 if ((giveup) || bail) {
7653 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7658 total_moved += moved_how_much;
7659 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7660 goal_mtu &= 0xfffffffc;
7665 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7667 if (total_moved == 0) {
7668 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7669 (net == stcb->asoc.primary_destination)) {
7670 /* ran dry for primary network net */
7671 SCTP_STAT_INCR(sctps_primary_randry);
7672 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7673 /* ran dry with CMT on */
7674 SCTP_STAT_INCR(sctps_cmt_randry);
7680 sctp_fix_ecn_echo(struct sctp_association *asoc)
7682 struct sctp_tmit_chunk *chk;
7684 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7685 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7686 chk->sent = SCTP_DATAGRAM_UNSENT;
7692 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7694 struct sctp_association *asoc;
7695 struct sctp_tmit_chunk *chk;
7696 struct sctp_stream_queue_pending *sp;
7703 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7704 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7705 if (sp->net == net) {
7706 sctp_free_remote_addr(sp->net);
7711 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7712 if (chk->whoTo == net) {
7713 sctp_free_remote_addr(chk->whoTo);
7720 sctp_med_chunk_output(struct sctp_inpcb *inp,
7721 struct sctp_tcb *stcb,
7722 struct sctp_association *asoc,
7725 int control_only, int from_where,
7726 struct timeval *now, int *now_filled, int frag_point, int so_locked
7727 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7733 * Ok this is the generic chunk service queue. we must do the
7734 * following: - Service the stream queue that is next, moving any
7735 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7736 * LAST to the out queue in one pass) and assigning TSN's - Check to
7737 * see if the cwnd/rwnd allows any output, if so we go ahead and
7738 * fomulate and send the low level chunks. Making sure to combine
7739 * any control in the control chunk queue also.
7741 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7742 struct mbuf *outchain, *endoutchain;
7743 struct sctp_tmit_chunk *chk, *nchk;
7745 /* temp arrays for unlinking */
7746 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7747 int no_fragmentflg, error;
7748 unsigned int max_rwnd_per_dest, max_send_per_dest;
7749 int one_chunk, hbflag, skip_data_for_this_net;
7750 int asconf, cookie, no_out_cnt;
7751 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7752 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7754 uint32_t auth_offset = 0;
7755 struct sctp_auth_chunk *auth = NULL;
7756 uint16_t auth_keyid;
7757 int override_ok = 1;
7758 int skip_fill_up = 0;
7759 int data_auth_reqd = 0;
7762 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7768 auth_keyid = stcb->asoc.authinfo.active_keyid;
7770 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7771 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7772 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7777 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7779 * First lets prime the pump. For each destination, if there is room
7780 * in the flight size, attempt to pull an MTU's worth out of the
7781 * stream queues into the general send_queue
7783 #ifdef SCTP_AUDITING_ENABLED
7784 sctp_audit_log(0xC2, 2);
7786 SCTP_TCB_LOCK_ASSERT(stcb);
7788 if ((control_only) || (asoc->stream_reset_outstanding))
7793 /* Nothing to possible to send? */
7794 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7795 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7796 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7797 TAILQ_EMPTY(&asoc->send_queue) &&
7798 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7803 if (asoc->peers_rwnd == 0) {
7804 /* No room in peers rwnd */
7806 if (asoc->total_flight > 0) {
7807 /* we are allowed one chunk in flight */
7811 if (stcb->asoc.ecn_echo_cnt_onq) {
7812 /* Record where a sack goes, if any */
7813 if (no_data_chunks &&
7814 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7815 /* Nothing but ECNe to send - we don't do that */
7816 goto nothing_to_send;
7818 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7819 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7820 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7821 sack_goes_to = chk->whoTo;
7826 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7827 if (stcb->sctp_socket)
7828 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7830 max_send_per_dest = 0;
7831 if (no_data_chunks == 0) {
7832 /* How many non-directed chunks are there? */
7833 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7834 if (chk->whoTo == NULL) {
7836 * We already have non-directed chunks on
7837 * the queue, no need to do a fill-up.
7845 if ((no_data_chunks == 0) &&
7846 (skip_fill_up == 0) &&
7847 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7848 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7850 * This for loop we are in takes in each net, if
7851 * its's got space in cwnd and has data sent to it
7852 * (when CMT is off) then it calls
7853 * sctp_fill_outqueue for the net. This gets data on
7854 * the send queue for that network.
7856 * In sctp_fill_outqueue TSN's are assigned and data is
7857 * copied out of the stream buffers. Note mostly
7858 * copy by reference (we hope).
7860 net->window_probe = 0;
7861 if ((net != stcb->asoc.alternate) &&
7862 ((net->dest_state & SCTP_ADDR_PF) ||
7863 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7864 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7865 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7866 sctp_log_cwnd(stcb, net, 1,
7867 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7871 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7872 (net->flight_size == 0)) {
7873 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7875 if (net->flight_size >= net->cwnd) {
7876 /* skip this network, no room - can't fill */
7877 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7878 sctp_log_cwnd(stcb, net, 3,
7879 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7883 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7884 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7886 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7888 /* memory alloc failure */
7894 /* now service each destination and send out what we can for it */
7895 /* Nothing to send? */
7896 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7897 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7898 TAILQ_EMPTY(&asoc->send_queue)) {
7902 if (asoc->sctp_cmt_on_off > 0) {
7903 /* get the last start point */
7904 start_at = asoc->last_net_cmt_send_started;
7905 if (start_at == NULL) {
7906 /* null so to beginning */
7907 start_at = TAILQ_FIRST(&asoc->nets);
7909 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7910 if (start_at == NULL) {
7911 start_at = TAILQ_FIRST(&asoc->nets);
7914 asoc->last_net_cmt_send_started = start_at;
7916 start_at = TAILQ_FIRST(&asoc->nets);
7918 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7919 if (chk->whoTo == NULL) {
7920 if (asoc->alternate) {
7921 chk->whoTo = asoc->alternate;
7923 chk->whoTo = asoc->primary_destination;
7925 atomic_add_int(&chk->whoTo->ref_count, 1);
7928 old_start_at = NULL;
7929 again_one_more_time:
7930 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7931 /* how much can we send? */
7932 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7933 if (old_start_at && (old_start_at == net)) {
7934 /* through list ocmpletely. */
7938 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7939 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7940 (net->flight_size >= net->cwnd)) {
7942 * Nothing on control or asconf and flight is full,
7943 * we can skip even in the CMT case.
7947 ctl_cnt = bundle_at = 0;
7948 endoutchain = outchain = NULL;
7951 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7952 skip_data_for_this_net = 1;
7954 skip_data_for_this_net = 0;
7956 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7958 * if we have a route and an ifp check to see if we
7959 * have room to send to this guy
7963 ifp = net->ro.ro_rt->rt_ifp;
7964 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
7965 SCTP_STAT_INCR(sctps_ifnomemqueued);
7966 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
7967 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
7972 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7975 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
7980 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
7990 if (mtu > asoc->peers_rwnd) {
7991 if (asoc->total_flight > 0) {
7992 /* We have a packet in flight somewhere */
7993 r_mtu = asoc->peers_rwnd;
7995 /* We are always allowed to send one MTU out */
8002 /************************/
8003 /* ASCONF transmission */
8004 /************************/
8005 /* Now first lets go through the asconf queue */
8006 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8007 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8010 if (chk->whoTo == NULL) {
8011 if (asoc->alternate == NULL) {
8012 if (asoc->primary_destination != net) {
8016 if (asoc->alternate != net) {
8021 if (chk->whoTo != net) {
8025 if (chk->data == NULL) {
8028 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8029 chk->sent != SCTP_DATAGRAM_RESEND) {
8033 * if no AUTH is yet included and this chunk
8034 * requires it, make sure to account for it. We
8035 * don't apply the size until the AUTH chunk is
8036 * actually added below in case there is no room for
8037 * this chunk. NOTE: we overload the use of "omtu"
8040 if ((auth == NULL) &&
8041 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8042 stcb->asoc.peer_auth_chunks)) {
8043 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8046 /* Here we do NOT factor the r_mtu */
8047 if ((chk->send_size < (int)(mtu - omtu)) ||
8048 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8050 * We probably should glom the mbuf chain
8051 * from the chk->data for control but the
8052 * problem is it becomes yet one more level
8053 * of tracking to do if for some reason
8054 * output fails. Then I have got to
8055 * reconstruct the merged control chain.. el
8056 * yucko.. for now we take the easy way and
8060 * Add an AUTH chunk, if chunk requires it
8061 * save the offset into the chain for AUTH
8063 if ((auth == NULL) &&
8064 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8065 stcb->asoc.peer_auth_chunks))) {
8066 outchain = sctp_add_auth_chunk(outchain,
8071 chk->rec.chunk_id.id);
8072 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8074 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8075 (int)chk->rec.chunk_id.can_take_data,
8076 chk->send_size, chk->copy_by_ref);
8077 if (outchain == NULL) {
8079 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8082 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8083 /* update our MTU size */
8084 if (mtu > (chk->send_size + omtu))
8085 mtu -= (chk->send_size + omtu);
8088 to_out += (chk->send_size + omtu);
8089 /* Do clear IP_DF ? */
8090 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8093 if (chk->rec.chunk_id.can_take_data)
8096 * set hb flag since we can use these for
8102 * should sysctl this: don't bundle data
8103 * with ASCONF since it requires AUTH
8106 chk->sent = SCTP_DATAGRAM_SENT;
8107 if (chk->whoTo == NULL) {
8109 atomic_add_int(&net->ref_count, 1);
8114 * Ok we are out of room but we can
8115 * output without effecting the
8116 * flight size since this little guy
8117 * is a control only packet.
8119 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8121 * do NOT clear the asconf flag as
8122 * it is used to do appropriate
8123 * source address selection.
8125 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8126 (struct sockaddr *)&net->ro._l_addr,
8127 outchain, auth_offset, auth,
8128 stcb->asoc.authinfo.active_keyid,
8129 no_fragmentflg, 0, NULL, asconf,
8130 inp->sctp_lport, stcb->rport,
8131 htonl(stcb->asoc.peer_vtag),
8132 net->port, so_locked, NULL, NULL))) {
8133 if (error == ENOBUFS) {
8134 asoc->ifp_had_enobuf = 1;
8135 SCTP_STAT_INCR(sctps_lowlevelerr);
8137 if (from_where == 0) {
8138 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8140 if (*now_filled == 0) {
8141 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8143 *now = net->last_sent_time;
8145 net->last_sent_time = *now;
8148 /* error, could not output */
8149 if (error == EHOSTUNREACH) {
8155 sctp_move_chunks_from_net(stcb, net);
8160 asoc->ifp_had_enobuf = 0;
8161 if (*now_filled == 0) {
8162 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8164 *now = net->last_sent_time;
8166 net->last_sent_time = *now;
8170 * increase the number we sent, if a
8171 * cookie is sent we don't tell them
8174 outchain = endoutchain = NULL;
8178 *num_out += ctl_cnt;
8179 /* recalc a clean slate and setup */
8180 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
8181 mtu = (net->mtu - SCTP_MIN_OVERHEAD);
8183 mtu = (net->mtu - SCTP_MIN_V4_OVERHEAD);
8190 /************************/
8191 /* Control transmission */
8192 /************************/
8193 /* Now first lets go through the control queue */
8194 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8195 if ((sack_goes_to) &&
8196 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8197 (chk->whoTo != sack_goes_to)) {
8199 * if we have a sack in queue, and we are
8200 * looking at an ecn echo that is NOT queued
8201 * to where the sack is going..
8203 if (chk->whoTo == net) {
8205 * Don't transmit it to where its
8206 * going (current net)
8209 } else if (sack_goes_to == net) {
8211 * But do transmit it to this
8214 goto skip_net_check;
8217 if (chk->whoTo == NULL) {
8218 if (asoc->alternate == NULL) {
8219 if (asoc->primary_destination != net) {
8223 if (asoc->alternate != net) {
8228 if (chk->whoTo != net) {
8233 if (chk->data == NULL) {
8236 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8238 * It must be unsent. Cookies and ASCONF's
8239 * hang around but there timers will force
8240 * when marked for resend.
8245 * if no AUTH is yet included and this chunk
8246 * requires it, make sure to account for it. We
8247 * don't apply the size until the AUTH chunk is
8248 * actually added below in case there is no room for
8249 * this chunk. NOTE: we overload the use of "omtu"
8252 if ((auth == NULL) &&
8253 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8254 stcb->asoc.peer_auth_chunks)) {
8255 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8258 /* Here we do NOT factor the r_mtu */
8259 if ((chk->send_size <= (int)(mtu - omtu)) ||
8260 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8262 * We probably should glom the mbuf chain
8263 * from the chk->data for control but the
8264 * problem is it becomes yet one more level
8265 * of tracking to do if for some reason
8266 * output fails. Then I have got to
8267 * reconstruct the merged control chain.. el
8268 * yucko.. for now we take the easy way and
8272 * Add an AUTH chunk, if chunk requires it
8273 * save the offset into the chain for AUTH
8275 if ((auth == NULL) &&
8276 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8277 stcb->asoc.peer_auth_chunks))) {
8278 outchain = sctp_add_auth_chunk(outchain,
8283 chk->rec.chunk_id.id);
8284 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8286 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8287 (int)chk->rec.chunk_id.can_take_data,
8288 chk->send_size, chk->copy_by_ref);
8289 if (outchain == NULL) {
8291 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8294 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8295 /* update our MTU size */
8296 if (mtu > (chk->send_size + omtu))
8297 mtu -= (chk->send_size + omtu);
8300 to_out += (chk->send_size + omtu);
8301 /* Do clear IP_DF ? */
8302 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8305 if (chk->rec.chunk_id.can_take_data)
8307 /* Mark things to be removed, if needed */
8308 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8309 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8310 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8311 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8312 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8313 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8314 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8315 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8316 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8317 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8318 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8319 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8322 /* remove these chunks at the end */
8323 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8324 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8325 /* turn off the timer */
8326 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8327 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8328 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8334 * Other chunks, since they have
8335 * timers running (i.e. COOKIE) we
8336 * just "trust" that it gets sent or
8340 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8343 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8345 * Increment ecne send count
8346 * here this means we may be
8347 * over-zealous in our
8348 * counting if the send
8349 * fails, but its the best
8350 * place to do it (we used
8351 * to do it in the queue of
8352 * the chunk, but that did
8353 * not tell how many times
8356 SCTP_STAT_INCR(sctps_sendecne);
8358 chk->sent = SCTP_DATAGRAM_SENT;
8359 if (chk->whoTo == NULL) {
8361 atomic_add_int(&net->ref_count, 1);
8367 * Ok we are out of room but we can
8368 * output without effecting the
8369 * flight size since this little guy
8370 * is a control only packet.
8373 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8375 * do NOT clear the asconf
8376 * flag as it is used to do
8377 * appropriate source
8378 * address selection.
8382 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8385 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8386 (struct sockaddr *)&net->ro._l_addr,
8389 stcb->asoc.authinfo.active_keyid,
8390 no_fragmentflg, 0, NULL, asconf,
8391 inp->sctp_lport, stcb->rport,
8392 htonl(stcb->asoc.peer_vtag),
8393 net->port, so_locked, NULL, NULL))) {
8394 if (error == ENOBUFS) {
8395 asoc->ifp_had_enobuf = 1;
8396 SCTP_STAT_INCR(sctps_lowlevelerr);
8398 if (from_where == 0) {
8399 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8401 /* error, could not output */
8403 if (*now_filled == 0) {
8404 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8406 *now = net->last_sent_time;
8408 net->last_sent_time = *now;
8412 if (error == EHOSTUNREACH) {
8418 sctp_move_chunks_from_net(stcb, net);
8423 asoc->ifp_had_enobuf = 0;
8424 /* Only HB or ASCONF advances time */
8426 if (*now_filled == 0) {
8427 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8429 *now = net->last_sent_time;
8431 net->last_sent_time = *now;
8436 * increase the number we sent, if a
8437 * cookie is sent we don't tell them
8440 outchain = endoutchain = NULL;
8444 *num_out += ctl_cnt;
8445 /* recalc a clean slate and setup */
8446 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
8447 mtu = (net->mtu - SCTP_MIN_OVERHEAD);
8449 mtu = (net->mtu - SCTP_MIN_V4_OVERHEAD);
8456 /* JRI: if dest is in PF state, do not send data to it */
8457 if ((asoc->sctp_cmt_on_off > 0) &&
8458 (net != stcb->asoc.alternate) &&
8459 (net->dest_state & SCTP_ADDR_PF)) {
8462 if (net->flight_size >= net->cwnd) {
8465 if ((asoc->sctp_cmt_on_off > 0) &&
8466 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8467 (net->flight_size > max_rwnd_per_dest)) {
8471 * We need a specific accounting for the usage of the send
8472 * buffer. We also need to check the number of messages per
8473 * net. For now, this is better than nothing and it disabled
8476 if ((asoc->sctp_cmt_on_off > 0) &&
8477 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8478 (max_send_per_dest > 0) &&
8479 (net->flight_size > max_send_per_dest)) {
8482 /*********************/
8483 /* Data transmission */
8484 /*********************/
8486 * if AUTH for DATA is required and no AUTH has been added
8487 * yet, account for this in the mtu now... if no data can be
8488 * bundled, this adjustment won't matter anyways since the
8489 * packet will be going out...
8491 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8492 stcb->asoc.peer_auth_chunks);
8493 if (data_auth_reqd && (auth == NULL)) {
8494 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8496 /* now lets add any data within the MTU constraints */
8497 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8499 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8500 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8506 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8507 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8517 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8518 (skip_data_for_this_net == 0)) ||
8520 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8521 if (no_data_chunks) {
8522 /* let only control go out */
8526 if (net->flight_size >= net->cwnd) {
8527 /* skip this net, no room for data */
8531 if ((chk->whoTo != NULL) &&
8532 (chk->whoTo != net)) {
8533 /* Don't send the chunk on this net */
8536 if (asoc->sctp_cmt_on_off == 0) {
8537 if ((asoc->alternate) &&
8538 (asoc->alternate != net) &&
8539 (chk->whoTo == NULL)) {
8541 } else if ((net != asoc->primary_destination) &&
8542 (asoc->alternate == NULL) &&
8543 (chk->whoTo == NULL)) {
8547 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8549 * strange, we have a chunk that is
8550 * to big for its destination and
8551 * yet no fragment ok flag.
8552 * Something went wrong when the
8553 * PMTU changed...we did not mark
8554 * this chunk for some reason?? I
8555 * will fix it here by letting IP
8556 * fragment it for now and printing
8557 * a warning. This really should not
8560 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8561 chk->send_size, mtu);
8562 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8564 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8565 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8566 struct sctp_data_chunk *dchkh;
8568 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8569 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8571 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8572 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8573 /* ok we will add this one */
8576 * Add an AUTH chunk, if chunk
8577 * requires it, save the offset into
8578 * the chain for AUTH
8580 if (data_auth_reqd) {
8582 outchain = sctp_add_auth_chunk(outchain,
8588 auth_keyid = chk->auth_keyid;
8590 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8591 } else if (override_ok) {
8596 auth_keyid = chk->auth_keyid;
8598 } else if (auth_keyid != chk->auth_keyid) {
8606 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8607 chk->send_size, chk->copy_by_ref);
8608 if (outchain == NULL) {
8609 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8610 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8611 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8614 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8617 /* upate our MTU size */
8618 /* Do clear IP_DF ? */
8619 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8622 /* unsigned subtraction of mtu */
8623 if (mtu > chk->send_size)
8624 mtu -= chk->send_size;
8627 /* unsigned subtraction of r_mtu */
8628 if (r_mtu > chk->send_size)
8629 r_mtu -= chk->send_size;
8633 to_out += chk->send_size;
8634 if ((to_out > mx_mtu) && no_fragmentflg) {
8636 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8638 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8642 chk->window_probe = 0;
8643 data_list[bundle_at++] = chk;
8644 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8648 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8649 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8650 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8652 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8654 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8655 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8665 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8667 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8668 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8669 data_list[0]->window_probe = 1;
8670 net->window_probe = 1;
8676 * Must be sent in order of the
8677 * TSN's (on a network)
8681 } /* for (chunk gather loop for this net) */
8682 } /* if asoc.state OPEN */
8684 /* Is there something to send for this destination? */
8686 /* We may need to start a control timer or two */
8688 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8691 * do NOT clear the asconf flag as it is
8692 * used to do appropriate source address
8697 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8700 /* must start a send timer if data is being sent */
8701 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8703 * no timer running on this destination
8706 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8708 /* Now send it, if there is anything to send :> */
8709 if ((error = sctp_lowlevel_chunk_output(inp,
8712 (struct sockaddr *)&net->ro._l_addr,
8721 inp->sctp_lport, stcb->rport,
8722 htonl(stcb->asoc.peer_vtag),
8723 net->port, so_locked, NULL, NULL))) {
8724 /* error, we could not output */
8725 if (error == ENOBUFS) {
8726 SCTP_STAT_INCR(sctps_lowlevelerr);
8727 asoc->ifp_had_enobuf = 1;
8729 if (from_where == 0) {
8730 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8732 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8734 if (*now_filled == 0) {
8735 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8737 *now = net->last_sent_time;
8739 net->last_sent_time = *now;
8743 if (error == EHOSTUNREACH) {
8745 * Destination went unreachable
8748 sctp_move_chunks_from_net(stcb, net);
8752 * I add this line to be paranoid. As far as
8753 * I can tell the continue, takes us back to
8754 * the top of the for, but just to make sure
8755 * I will reset these again here.
8757 ctl_cnt = bundle_at = 0;
8758 continue; /* This takes us back to the
8759 * for() for the nets. */
8761 asoc->ifp_had_enobuf = 0;
8763 outchain = endoutchain = NULL;
8766 if (bundle_at || hbflag) {
8767 /* For data/asconf and hb set time */
8768 if (*now_filled == 0) {
8769 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8771 *now = net->last_sent_time;
8773 net->last_sent_time = *now;
8777 *num_out += (ctl_cnt + bundle_at);
8780 /* setup for a RTO measurement */
8781 tsns_sent = data_list[0]->rec.data.TSN_seq;
8782 /* fill time if not already filled */
8783 if (*now_filled == 0) {
8784 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8786 *now = asoc->time_last_sent;
8788 asoc->time_last_sent = *now;
8790 if (net->rto_needed) {
8791 data_list[0]->do_rtt = 1;
8792 net->rto_needed = 0;
8794 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8795 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8801 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8802 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8805 if (old_start_at == NULL) {
8806 old_start_at = start_at;
8807 start_at = TAILQ_FIRST(&asoc->nets);
8809 goto again_one_more_time;
8812 * At the end there should be no NON timed chunks hanging on this
8815 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8816 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8818 if ((*num_out == 0) && (*reason_code == 0)) {
8823 sctp_clean_up_ctl(stcb, asoc, so_locked);
8828 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8831 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8832 * the control chunk queue.
8834 struct sctp_chunkhdr *hdr;
8835 struct sctp_tmit_chunk *chk;
8838 SCTP_TCB_LOCK_ASSERT(stcb);
8839 sctp_alloc_a_chunk(stcb, chk);
8842 sctp_m_freem(op_err);
8845 chk->copy_by_ref = 0;
8846 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT);
8847 if (op_err == NULL) {
8848 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8853 while (mat != NULL) {
8854 chk->send_size += SCTP_BUF_LEN(mat);
8855 mat = SCTP_BUF_NEXT(mat);
8857 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8858 chk->rec.chunk_id.can_take_data = 1;
8859 chk->sent = SCTP_DATAGRAM_UNSENT;
8862 chk->asoc = &stcb->asoc;
8865 hdr = mtod(op_err, struct sctp_chunkhdr *);
8866 hdr->chunk_type = SCTP_OPERATION_ERROR;
8867 hdr->chunk_flags = 0;
8868 hdr->chunk_length = htons(chk->send_size);
8869 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8872 chk->asoc->ctrl_queue_cnt++;
8876 sctp_send_cookie_echo(struct mbuf *m,
8878 struct sctp_tcb *stcb,
8879 struct sctp_nets *net)
8882 * pull out the cookie and put it at the front of the control chunk
8886 struct mbuf *cookie;
8887 struct sctp_paramhdr parm, *phdr;
8888 struct sctp_chunkhdr *hdr;
8889 struct sctp_tmit_chunk *chk;
8890 uint16_t ptype, plen;
8892 /* First find the cookie in the param area */
8894 at = offset + sizeof(struct sctp_init_chunk);
8896 SCTP_TCB_LOCK_ASSERT(stcb);
8898 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8902 ptype = ntohs(phdr->param_type);
8903 plen = ntohs(phdr->param_length);
8904 if (ptype == SCTP_STATE_COOKIE) {
8907 /* found the cookie */
8908 if ((pad = (plen % 4))) {
8911 cookie = SCTP_M_COPYM(m, at, plen, M_DONTWAIT);
8912 if (cookie == NULL) {
8916 #ifdef SCTP_MBUF_LOGGING
8917 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8922 if (SCTP_BUF_IS_EXTENDED(mat)) {
8923 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8925 mat = SCTP_BUF_NEXT(mat);
8931 at += SCTP_SIZE32(plen);
8933 if (cookie == NULL) {
8934 /* Did not find the cookie */
8937 /* ok, we got the cookie lets change it into a cookie echo chunk */
8939 /* first the change from param to cookie */
8940 hdr = mtod(cookie, struct sctp_chunkhdr *);
8941 hdr->chunk_type = SCTP_COOKIE_ECHO;
8942 hdr->chunk_flags = 0;
8943 /* get the chunk stuff now and place it in the FRONT of the queue */
8944 sctp_alloc_a_chunk(stcb, chk);
8947 sctp_m_freem(cookie);
8950 chk->copy_by_ref = 0;
8951 chk->send_size = plen;
8952 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8953 chk->rec.chunk_id.can_take_data = 0;
8954 chk->sent = SCTP_DATAGRAM_UNSENT;
8956 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8957 chk->asoc = &stcb->asoc;
8960 atomic_add_int(&chk->whoTo->ref_count, 1);
8961 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8962 chk->asoc->ctrl_queue_cnt++;
8967 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
8971 struct sctp_nets *net)
8974 * take a HB request and make it into a HB ack and send it.
8976 struct mbuf *outchain;
8977 struct sctp_chunkhdr *chdr;
8978 struct sctp_tmit_chunk *chk;
8982 /* must have a net pointer */
8985 outchain = SCTP_M_COPYM(m, offset, chk_length, M_DONTWAIT);
8986 if (outchain == NULL) {
8987 /* gak out of memory */
8990 #ifdef SCTP_MBUF_LOGGING
8991 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8996 if (SCTP_BUF_IS_EXTENDED(mat)) {
8997 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8999 mat = SCTP_BUF_NEXT(mat);
9003 chdr = mtod(outchain, struct sctp_chunkhdr *);
9004 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9005 chdr->chunk_flags = 0;
9006 if (chk_length % 4) {
9008 uint32_t cpthis = 0;
9011 padlen = 4 - (chk_length % 4);
9012 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9014 sctp_alloc_a_chunk(stcb, chk);
9017 sctp_m_freem(outchain);
9020 chk->copy_by_ref = 0;
9021 chk->send_size = chk_length;
9022 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9023 chk->rec.chunk_id.can_take_data = 1;
9024 chk->sent = SCTP_DATAGRAM_UNSENT;
9027 chk->asoc = &stcb->asoc;
9028 chk->data = outchain;
9030 atomic_add_int(&chk->whoTo->ref_count, 1);
9031 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9032 chk->asoc->ctrl_queue_cnt++;
9036 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9038 /* formulate and queue a cookie-ack back to sender */
9039 struct mbuf *cookie_ack;
9040 struct sctp_chunkhdr *hdr;
9041 struct sctp_tmit_chunk *chk;
9044 SCTP_TCB_LOCK_ASSERT(stcb);
9046 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
9047 if (cookie_ack == NULL) {
9051 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9052 sctp_alloc_a_chunk(stcb, chk);
9055 sctp_m_freem(cookie_ack);
9058 chk->copy_by_ref = 0;
9059 chk->send_size = sizeof(struct sctp_chunkhdr);
9060 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9061 chk->rec.chunk_id.can_take_data = 1;
9062 chk->sent = SCTP_DATAGRAM_UNSENT;
9065 chk->asoc = &stcb->asoc;
9066 chk->data = cookie_ack;
9067 if (chk->asoc->last_control_chunk_from != NULL) {
9068 chk->whoTo = chk->asoc->last_control_chunk_from;
9069 atomic_add_int(&chk->whoTo->ref_count, 1);
9073 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9074 hdr->chunk_type = SCTP_COOKIE_ACK;
9075 hdr->chunk_flags = 0;
9076 hdr->chunk_length = htons(chk->send_size);
9077 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9078 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9079 chk->asoc->ctrl_queue_cnt++;
9085 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9087 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9088 struct mbuf *m_shutdown_ack;
9089 struct sctp_shutdown_ack_chunk *ack_cp;
9090 struct sctp_tmit_chunk *chk;
9092 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9093 if (m_shutdown_ack == NULL) {
9097 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9098 sctp_alloc_a_chunk(stcb, chk);
9101 sctp_m_freem(m_shutdown_ack);
9104 chk->copy_by_ref = 0;
9105 chk->send_size = sizeof(struct sctp_chunkhdr);
9106 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9107 chk->rec.chunk_id.can_take_data = 1;
9108 chk->sent = SCTP_DATAGRAM_UNSENT;
9111 chk->asoc = &stcb->asoc;
9112 chk->data = m_shutdown_ack;
9115 atomic_add_int(&chk->whoTo->ref_count, 1);
9117 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9118 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9119 ack_cp->ch.chunk_flags = 0;
9120 ack_cp->ch.chunk_length = htons(chk->send_size);
9121 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9122 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9123 chk->asoc->ctrl_queue_cnt++;
9128 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9130 /* formulate and queue a SHUTDOWN to the sender */
9131 struct mbuf *m_shutdown;
9132 struct sctp_shutdown_chunk *shutdown_cp;
9133 struct sctp_tmit_chunk *chk;
9135 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9136 if (m_shutdown == NULL) {
9140 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9141 sctp_alloc_a_chunk(stcb, chk);
9144 sctp_m_freem(m_shutdown);
9147 chk->copy_by_ref = 0;
9148 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9149 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9150 chk->rec.chunk_id.can_take_data = 1;
9151 chk->sent = SCTP_DATAGRAM_UNSENT;
9154 chk->asoc = &stcb->asoc;
9155 chk->data = m_shutdown;
9158 atomic_add_int(&chk->whoTo->ref_count, 1);
9160 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9161 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9162 shutdown_cp->ch.chunk_flags = 0;
9163 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9164 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9165 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9166 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9167 chk->asoc->ctrl_queue_cnt++;
9172 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9175 * formulate and queue an ASCONF to the peer. ASCONF parameters
9176 * should be queued on the assoc queue.
9178 struct sctp_tmit_chunk *chk;
9179 struct mbuf *m_asconf;
9182 SCTP_TCB_LOCK_ASSERT(stcb);
9184 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9185 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9186 /* can't send a new one if there is one in flight already */
9189 /* compose an ASCONF chunk, maximum length is PMTU */
9190 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9191 if (m_asconf == NULL) {
9194 sctp_alloc_a_chunk(stcb, chk);
9197 sctp_m_freem(m_asconf);
9200 chk->copy_by_ref = 0;
9201 chk->data = m_asconf;
9202 chk->send_size = len;
9203 chk->rec.chunk_id.id = SCTP_ASCONF;
9204 chk->rec.chunk_id.can_take_data = 0;
9205 chk->sent = SCTP_DATAGRAM_UNSENT;
9207 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9208 chk->asoc = &stcb->asoc;
9211 atomic_add_int(&chk->whoTo->ref_count, 1);
9213 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9214 chk->asoc->ctrl_queue_cnt++;
9219 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9222 * formulate and queue a asconf-ack back to sender. the asconf-ack
9223 * must be stored in the tcb.
9225 struct sctp_tmit_chunk *chk;
9226 struct sctp_asconf_ack *ack, *latest_ack;
9227 struct mbuf *m_ack, *m;
9228 struct sctp_nets *net = NULL;
9230 SCTP_TCB_LOCK_ASSERT(stcb);
9231 /* Get the latest ASCONF-ACK */
9232 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9233 if (latest_ack == NULL) {
9236 if (latest_ack->last_sent_to != NULL &&
9237 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9238 /* we're doing a retransmission */
9239 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9242 if (stcb->asoc.last_control_chunk_from == NULL) {
9243 if (stcb->asoc.alternate) {
9244 net = stcb->asoc.alternate;
9246 net = stcb->asoc.primary_destination;
9249 net = stcb->asoc.last_control_chunk_from;
9254 if (stcb->asoc.last_control_chunk_from == NULL) {
9255 if (stcb->asoc.alternate) {
9256 net = stcb->asoc.alternate;
9258 net = stcb->asoc.primary_destination;
9261 net = stcb->asoc.last_control_chunk_from;
9264 latest_ack->last_sent_to = net;
9266 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9267 if (ack->data == NULL) {
9270 /* copy the asconf_ack */
9271 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_DONTWAIT);
9272 if (m_ack == NULL) {
9273 /* couldn't copy it */
9276 #ifdef SCTP_MBUF_LOGGING
9277 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9282 if (SCTP_BUF_IS_EXTENDED(mat)) {
9283 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9285 mat = SCTP_BUF_NEXT(mat);
9290 sctp_alloc_a_chunk(stcb, chk);
9294 sctp_m_freem(m_ack);
9297 chk->copy_by_ref = 0;
9301 atomic_add_int(&chk->whoTo->ref_count, 1);
9307 chk->send_size = ack->len;
9308 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9309 chk->rec.chunk_id.can_take_data = 1;
9310 chk->sent = SCTP_DATAGRAM_UNSENT;
9312 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */
9313 chk->asoc = &stcb->asoc;
9315 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9316 chk->asoc->ctrl_queue_cnt++;
9323 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9324 struct sctp_tcb *stcb,
9325 struct sctp_association *asoc,
9326 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9327 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9333 * send out one MTU of retransmission. If fast_retransmit is
9334 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9335 * rwnd. For a Cookie or Asconf in the control chunk queue we
9336 * retransmit them by themselves.
9338 * For data chunks we will pick out the lowest TSN's in the sent_queue
9339 * marked for resend and bundle them all together (up to a MTU of
9340 * destination). The address to send to should have been
9341 * selected/changed where the retransmission was marked (i.e. in FR
9342 * or t3-timeout routines).
9344 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9345 struct sctp_tmit_chunk *chk, *fwd;
9346 struct mbuf *m, *endofchain;
9347 struct sctp_nets *net = NULL;
9348 uint32_t tsns_sent = 0;
9349 int no_fragmentflg, bundle_at, cnt_thru;
9351 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9352 struct sctp_auth_chunk *auth = NULL;
9353 uint32_t auth_offset = 0;
9354 uint16_t auth_keyid;
9355 int override_ok = 1;
9356 int data_auth_reqd = 0;
9359 SCTP_TCB_LOCK_ASSERT(stcb);
9360 tmr_started = ctl_cnt = bundle_at = error = 0;
9365 endofchain = m = NULL;
9366 auth_keyid = stcb->asoc.authinfo.active_keyid;
9367 #ifdef SCTP_AUDITING_ENABLED
9368 sctp_audit_log(0xC3, 1);
9370 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9371 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9372 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9373 asoc->sent_queue_retran_cnt);
9374 asoc->sent_queue_cnt = 0;
9375 asoc->sent_queue_cnt_removeable = 0;
9376 /* send back 0/0 so we enter normal transmission */
9380 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9381 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9382 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9383 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9384 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9387 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9388 if (chk != asoc->str_reset) {
9390 * not eligible for retran if its
9397 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9402 * Add an AUTH chunk, if chunk requires it save the
9403 * offset into the chain for AUTH
9405 if ((auth == NULL) &&
9406 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9407 stcb->asoc.peer_auth_chunks))) {
9408 m = sctp_add_auth_chunk(m, &endofchain,
9409 &auth, &auth_offset,
9411 chk->rec.chunk_id.id);
9412 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9414 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9420 /* do we have control chunks to retransmit? */
9422 /* Start a timer no matter if we suceed or fail */
9423 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9424 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9425 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9426 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9427 chk->snd_count++; /* update our count */
9428 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9429 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9430 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9431 no_fragmentflg, 0, NULL, 0,
9432 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9433 chk->whoTo->port, so_locked, NULL, NULL))) {
9434 SCTP_STAT_INCR(sctps_lowlevelerr);
9437 m = endofchain = NULL;
9441 * We don't want to mark the net->sent time here since this
9442 * we use this for HB and retrans cannot measure RTT
9444 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9446 chk->sent = SCTP_DATAGRAM_SENT;
9447 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9451 /* Clean up the fwd-tsn list */
9452 sctp_clean_up_ctl(stcb, asoc, so_locked);
9457 * Ok, it is just data retransmission we need to do or that and a
9458 * fwd-tsn with it all.
9460 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9461 return (SCTP_RETRAN_DONE);
9463 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9464 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9465 /* not yet open, resend the cookie and that is it */
9468 #ifdef SCTP_AUDITING_ENABLED
9469 sctp_auditing(20, inp, stcb, NULL);
9471 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9472 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9473 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9474 /* No, not sent to this net or not ready for rtx */
9477 if (chk->data == NULL) {
9478 printf("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9479 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9482 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9483 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9484 /* Gak, we have exceeded max unlucky retran, abort! */
9485 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9487 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9488 atomic_add_int(&stcb->asoc.refcnt, 1);
9489 sctp_abort_an_association(stcb->sctp_ep, stcb, 0, NULL, so_locked);
9490 SCTP_TCB_LOCK(stcb);
9491 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9492 return (SCTP_RETRAN_EXIT);
9494 /* pick up the net */
9496 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
9497 mtu = (net->mtu - SCTP_MIN_OVERHEAD);
9499 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9502 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9503 /* No room in peers rwnd */
9506 tsn = asoc->last_acked_seq + 1;
9507 if (tsn == chk->rec.data.TSN_seq) {
9509 * we make a special exception for this
9510 * case. The peer has no rwnd but is missing
9511 * the lowest chunk.. which is probably what
9512 * is holding up the rwnd.
9514 goto one_chunk_around;
9519 if (asoc->peers_rwnd < mtu) {
9521 if ((asoc->peers_rwnd == 0) &&
9522 (asoc->total_flight == 0)) {
9523 chk->window_probe = 1;
9524 chk->whoTo->window_probe = 1;
9527 #ifdef SCTP_AUDITING_ENABLED
9528 sctp_audit_log(0xC3, 2);
9532 net->fast_retran_ip = 0;
9533 if (chk->rec.data.doing_fast_retransmit == 0) {
9535 * if no FR in progress skip destination that have
9536 * flight_size > cwnd.
9538 if (net->flight_size >= net->cwnd) {
9543 * Mark the destination net to have FR recovery
9547 net->fast_retran_ip = 1;
9551 * if no AUTH is yet included and this chunk requires it,
9552 * make sure to account for it. We don't apply the size
9553 * until the AUTH chunk is actually added below in case
9554 * there is no room for this chunk.
9556 if (data_auth_reqd && (auth == NULL)) {
9557 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9561 if ((chk->send_size <= (mtu - dmtu)) ||
9562 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9563 /* ok we will add this one */
9564 if (data_auth_reqd) {
9566 m = sctp_add_auth_chunk(m,
9572 auth_keyid = chk->auth_keyid;
9574 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9575 } else if (override_ok) {
9576 auth_keyid = chk->auth_keyid;
9578 } else if (chk->auth_keyid != auth_keyid) {
9579 /* different keyid, so done bundling */
9583 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9585 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9588 /* Do clear IP_DF ? */
9589 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9592 /* upate our MTU size */
9593 if (mtu > (chk->send_size + dmtu))
9594 mtu -= (chk->send_size + dmtu);
9597 data_list[bundle_at++] = chk;
9598 if (one_chunk && (asoc->total_flight <= 0)) {
9599 SCTP_STAT_INCR(sctps_windowprobed);
9602 if (one_chunk == 0) {
9604 * now are there anymore forward from chk to pick
9607 fwd = TAILQ_NEXT(chk, sctp_next);
9609 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9610 /* Nope, not for retran */
9611 fwd = TAILQ_NEXT(fwd, sctp_next);
9614 if (fwd->whoTo != net) {
9615 /* Nope, not the net in question */
9616 fwd = TAILQ_NEXT(fwd, sctp_next);
9619 if (data_auth_reqd && (auth == NULL)) {
9620 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9623 if (fwd->send_size <= (mtu - dmtu)) {
9624 if (data_auth_reqd) {
9626 m = sctp_add_auth_chunk(m,
9632 auth_keyid = fwd->auth_keyid;
9634 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9635 } else if (override_ok) {
9636 auth_keyid = fwd->auth_keyid;
9638 } else if (fwd->auth_keyid != auth_keyid) {
9646 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9648 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9651 /* Do clear IP_DF ? */
9652 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9655 /* upate our MTU size */
9656 if (mtu > (fwd->send_size + dmtu))
9657 mtu -= (fwd->send_size + dmtu);
9660 data_list[bundle_at++] = fwd;
9661 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9664 fwd = TAILQ_NEXT(fwd, sctp_next);
9666 /* can't fit so we are done */
9671 /* Is there something to send for this destination? */
9674 * No matter if we fail/or suceed we should start a
9675 * timer. A failure is like a lost IP packet :-)
9677 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9679 * no timer running on this destination
9682 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9685 /* Now lets send it, if there is anything to send :> */
9686 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9687 (struct sockaddr *)&net->ro._l_addr, m,
9688 auth_offset, auth, auth_keyid,
9689 no_fragmentflg, 0, NULL, 0,
9690 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9691 net->port, so_locked, NULL, NULL))) {
9692 /* error, we could not output */
9693 SCTP_STAT_INCR(sctps_lowlevelerr);
9696 m = endofchain = NULL;
9701 * We don't want to mark the net->sent time here
9702 * since this we use this for HB and retrans cannot
9705 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9707 /* For auto-close */
9709 if (*now_filled == 0) {
9710 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9711 *now = asoc->time_last_sent;
9714 asoc->time_last_sent = *now;
9716 *cnt_out += bundle_at;
9717 #ifdef SCTP_AUDITING_ENABLED
9718 sctp_audit_log(0xC4, bundle_at);
9721 tsns_sent = data_list[0]->rec.data.TSN_seq;
9723 for (i = 0; i < bundle_at; i++) {
9724 SCTP_STAT_INCR(sctps_sendretransdata);
9725 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9727 * When we have a revoked data, and we
9728 * retransmit it, then we clear the revoked
9729 * flag since this flag dictates if we
9730 * subtracted from the fs
9732 if (data_list[i]->rec.data.chunk_was_revoked) {
9733 /* Deflate the cwnd */
9734 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9735 data_list[i]->rec.data.chunk_was_revoked = 0;
9737 data_list[i]->snd_count++;
9738 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9739 /* record the time */
9740 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9741 if (data_list[i]->book_size_scale) {
9743 * need to double the book size on
9746 data_list[i]->book_size_scale = 0;
9748 * Since we double the booksize, we
9749 * must also double the output queue
9750 * size, since this get shrunk when
9751 * we free by this amount.
9753 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9754 data_list[i]->book_size *= 2;
9758 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9759 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9760 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9762 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9763 (uint32_t) (data_list[i]->send_size +
9764 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9766 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9767 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9768 data_list[i]->whoTo->flight_size,
9769 data_list[i]->book_size,
9770 (uintptr_t) data_list[i]->whoTo,
9771 data_list[i]->rec.data.TSN_seq);
9773 sctp_flight_size_increase(data_list[i]);
9774 sctp_total_flight_increase(stcb, data_list[i]);
9775 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9776 /* SWS sender side engages */
9777 asoc->peers_rwnd = 0;
9780 (data_list[i]->rec.data.doing_fast_retransmit)) {
9781 SCTP_STAT_INCR(sctps_sendfastretrans);
9782 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9783 (tmr_started == 0)) {
9785 * ok we just fast-retrans'd
9786 * the lowest TSN, i.e the
9787 * first on the list. In
9788 * this case we want to give
9789 * some more time to get a
9790 * SACK back without a
9793 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9794 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
9795 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9799 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9800 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9802 #ifdef SCTP_AUDITING_ENABLED
9803 sctp_auditing(21, inp, stcb, NULL);
9809 if (asoc->sent_queue_retran_cnt <= 0) {
9810 /* all done we have no more to retran */
9811 asoc->sent_queue_retran_cnt = 0;
9815 /* No more room in rwnd */
9818 /* stop the for loop here. we sent out a packet */
9826 sctp_timer_validation(struct sctp_inpcb *inp,
9827 struct sctp_tcb *stcb,
9828 struct sctp_association *asoc,
9831 struct sctp_nets *net;
9833 /* Validate that a timer is running somewhere */
9834 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9835 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9836 /* Here is a timer */
9840 SCTP_TCB_LOCK_ASSERT(stcb);
9841 /* Gak, we did not have a timer somewhere */
9842 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9843 if (asoc->alternate) {
9844 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9846 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9852 sctp_chunk_output(struct sctp_inpcb *inp,
9853 struct sctp_tcb *stcb,
9856 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9862 * Ok this is the generic chunk service queue. we must do the
9864 * - See if there are retransmits pending, if so we must
9866 * - Service the stream queue that is next, moving any
9867 * message (note I must get a complete message i.e.
9868 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9870 * - Check to see if the cwnd/rwnd allows any output, if so we
9871 * go ahead and fomulate and send the low level chunks. Making sure
9872 * to combine any control in the control chunk queue also.
9874 struct sctp_association *asoc;
9875 struct sctp_nets *net;
9876 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0;
9877 unsigned int burst_cnt = 0;
9881 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9884 unsigned int tot_frs = 0;
9887 /* The Nagle algorithm is only applied when handling a send call. */
9888 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9889 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9897 SCTP_TCB_LOCK_ASSERT(stcb);
9899 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9901 if ((un_sent <= 0) &&
9902 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9903 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9904 (asoc->sent_queue_retran_cnt == 0)) {
9905 /* Nothing to do unless there is something to be sent left */
9909 * Do we have something to send, data or control AND a sack timer
9910 * running, if so piggy-back the sack.
9912 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9913 sctp_send_sack(stcb, so_locked);
9914 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9916 while (asoc->sent_queue_retran_cnt) {
9918 * Ok, it is retransmission time only, we send out only ONE
9919 * packet with a single call off to the retran code.
9921 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9923 * Special hook for handling cookiess discarded
9924 * by peer that carried data. Send cookie-ack only
9925 * and then the next call with get the retran's.
9927 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9929 &now, &now_filled, frag_point, so_locked);
9931 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9932 /* if its not from a HB then do it */
9934 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9940 * its from any other place, we don't allow retran
9941 * output (only control)
9946 /* Can't send anymore */
9948 * now lets push out control by calling med-level
9949 * output once. this assures that we WILL send HB's
9952 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9954 &now, &now_filled, frag_point, so_locked);
9955 #ifdef SCTP_AUDITING_ENABLED
9956 sctp_auditing(8, inp, stcb, NULL);
9958 (void)sctp_timer_validation(inp, stcb, asoc, ret);
9963 * The count was off.. retran is not happening so do
9964 * the normal retransmission.
9966 #ifdef SCTP_AUDITING_ENABLED
9967 sctp_auditing(9, inp, stcb, NULL);
9969 if (ret == SCTP_RETRAN_EXIT) {
9974 if (from_where == SCTP_OUTPUT_FROM_T3) {
9975 /* Only one transmission allowed out of a timeout */
9976 #ifdef SCTP_AUDITING_ENABLED
9977 sctp_auditing(10, inp, stcb, NULL);
9979 /* Push out any control */
9980 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
9981 &now, &now_filled, frag_point, so_locked);
9984 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
9985 /* Hit FR burst limit */
9988 if ((num_out == 0) && (ret == 0)) {
9989 /* No more retrans to send */
9993 #ifdef SCTP_AUDITING_ENABLED
9994 sctp_auditing(12, inp, stcb, NULL);
9996 /* Check for bad destinations, if they exist move chunks around. */
9997 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9998 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10000 * if possible move things off of this address we
10001 * still may send below due to the dormant state but
10002 * we try to find an alternate address to send to
10003 * and if we have one we move all queued data on the
10004 * out wheel to this alternate address.
10006 if (net->ref_count > 1)
10007 sctp_move_chunks_from_net(stcb, net);
10010 * if ((asoc->sat_network) || (net->addr_is_local))
10011 * { burst_limit = asoc->max_burst *
10012 * SCTP_SAT_NETWORK_BURST_INCR; }
10014 if (asoc->max_burst > 0) {
10015 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10016 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10018 * JRS - Use the congestion
10019 * control given in the
10020 * congestion control module
10022 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10023 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10024 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10026 SCTP_STAT_INCR(sctps_maxburstqueued);
10028 net->fast_retran_ip = 0;
10030 if (net->flight_size == 0) {
10032 * Should be decaying the
10044 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10045 &reason_code, 0, from_where,
10046 &now, &now_filled, frag_point, so_locked);
10048 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10049 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10050 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10052 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10053 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10054 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10058 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10060 tot_out += num_out;
10062 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10063 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10064 if (num_out == 0) {
10065 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10070 * When the Nagle algorithm is used, look at how
10071 * much is unsent, then if its smaller than an MTU
10072 * and we have data in flight we stop, except if we
10073 * are handling a fragmented user message.
10075 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10076 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10077 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10078 (stcb->asoc.total_flight > 0) &&
10079 ((stcb->asoc.locked_on_sending == NULL) ||
10080 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10084 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10085 TAILQ_EMPTY(&asoc->send_queue) &&
10086 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10087 /* Nothing left to send */
10090 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10091 /* Nothing left to send */
10094 } while (num_out &&
10095 ((asoc->max_burst == 0) ||
10096 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10097 (burst_cnt < asoc->max_burst)));
10099 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10100 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10101 SCTP_STAT_INCR(sctps_maxburstqueued);
10102 asoc->burst_limit_applied = 1;
10103 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10104 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10107 asoc->burst_limit_applied = 0;
10110 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10111 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10113 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10117 * Now we need to clean up the control chunk chain if a ECNE is on
10118 * it. It must be marked as UNSENT again so next call will continue
10119 * to send it until such time that we get a CWR, to remove it.
10121 if (stcb->asoc.ecn_echo_cnt_onq)
10122 sctp_fix_ecn_echo(asoc);
10128 sctp_output(inp, m, addr, control, p, flags)
10129 struct sctp_inpcb *inp;
10131 struct sockaddr *addr;
10132 struct mbuf *control;
10137 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10140 if (inp->sctp_socket == NULL) {
10141 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10144 return (sctp_sosend(inp->sctp_socket,
10146 (struct uio *)NULL,
10154 send_forward_tsn(struct sctp_tcb *stcb,
10155 struct sctp_association *asoc)
10157 struct sctp_tmit_chunk *chk;
10158 struct sctp_forward_tsn_chunk *fwdtsn;
10159 uint32_t advance_peer_ack_point;
10161 SCTP_TCB_LOCK_ASSERT(stcb);
10162 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10163 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10164 /* mark it to unsent */
10165 chk->sent = SCTP_DATAGRAM_UNSENT;
10166 chk->snd_count = 0;
10167 /* Do we correct its output location? */
10169 sctp_free_remote_addr(chk->whoTo);
10172 goto sctp_fill_in_rest;
10175 /* Ok if we reach here we must build one */
10176 sctp_alloc_a_chunk(stcb, chk);
10180 asoc->fwd_tsn_cnt++;
10181 chk->copy_by_ref = 0;
10182 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10183 chk->rec.chunk_id.can_take_data = 0;
10186 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
10187 if (chk->data == NULL) {
10188 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10191 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10192 chk->sent = SCTP_DATAGRAM_UNSENT;
10193 chk->snd_count = 0;
10194 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10195 asoc->ctrl_queue_cnt++;
10198 * Here we go through and fill out the part that deals with
10199 * stream/seq of the ones we skip.
10201 SCTP_BUF_LEN(chk->data) = 0;
10203 struct sctp_tmit_chunk *at, *tp1, *last;
10204 struct sctp_strseq *strseq;
10205 unsigned int cnt_of_space, i, ovh;
10206 unsigned int space_needed;
10207 unsigned int cnt_of_skipped = 0;
10209 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10210 if (at->sent != SCTP_FORWARD_TSN_SKIP) {
10211 /* no more to look at */
10214 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10215 /* We don't report these */
10220 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10221 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10223 cnt_of_space = M_TRAILINGSPACE(chk->data);
10225 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10226 ovh = SCTP_MIN_OVERHEAD;
10228 ovh = SCTP_MIN_V4_OVERHEAD;
10230 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10231 /* trim to a mtu size */
10232 cnt_of_space = asoc->smallest_mtu - ovh;
10234 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10235 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10236 0xff, 0, cnt_of_skipped,
10237 asoc->advanced_peer_ack_point);
10240 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10241 if (cnt_of_space < space_needed) {
10243 * ok we must trim down the chunk by lowering the
10244 * advance peer ack point.
10246 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10247 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10248 0xff, 0xff, cnt_of_space,
10251 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10252 cnt_of_skipped /= sizeof(struct sctp_strseq);
10254 * Go through and find the TSN that will be the one
10257 at = TAILQ_FIRST(&asoc->sent_queue);
10258 for (i = 0; i < cnt_of_skipped; i++) {
10259 tp1 = TAILQ_NEXT(at, sctp_next);
10265 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10266 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10267 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10268 asoc->advanced_peer_ack_point);
10272 * last now points to last one I can report, update
10276 advance_peer_ack_point = last->rec.data.TSN_seq;
10277 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10278 cnt_of_skipped * sizeof(struct sctp_strseq);
10280 chk->send_size = space_needed;
10281 /* Setup the chunk */
10282 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10283 fwdtsn->ch.chunk_length = htons(chk->send_size);
10284 fwdtsn->ch.chunk_flags = 0;
10285 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10286 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10287 SCTP_BUF_LEN(chk->data) = chk->send_size;
10290 * Move pointer to after the fwdtsn and transfer to the
10293 strseq = (struct sctp_strseq *)fwdtsn;
10295 * Now populate the strseq list. This is done blindly
10296 * without pulling out duplicate stream info. This is
10297 * inefficent but won't harm the process since the peer will
10298 * look at these in sequence and will thus release anything.
10299 * It could mean we exceed the PMTU and chop off some that
10300 * we could have included.. but this is unlikely (aka 1432/4
10301 * would mean 300+ stream seq's would have to be reported in
10302 * one FWD-TSN. With a bit of work we can later FIX this to
10303 * optimize and pull out duplcates.. but it does add more
10304 * overhead. So for now... not!
10306 at = TAILQ_FIRST(&asoc->sent_queue);
10307 for (i = 0; i < cnt_of_skipped; i++) {
10308 tp1 = TAILQ_NEXT(at, sctp_next);
10311 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10312 /* We don't report these */
10317 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10318 at->rec.data.fwd_tsn_cnt = 0;
10320 strseq->stream = ntohs(at->rec.data.stream_number);
10321 strseq->sequence = ntohs(at->rec.data.stream_seq);
10331 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10332 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10338 * Queue up a SACK or NR-SACK in the control queue.
10339 * We must first check to see if a SACK or NR-SACK is
10340 * somehow on the control queue.
10341 * If so, we will take and and remove the old one.
10343 struct sctp_association *asoc;
10344 struct sctp_tmit_chunk *chk, *a_chk;
10345 struct sctp_sack_chunk *sack;
10346 struct sctp_nr_sack_chunk *nr_sack;
10347 struct sctp_gap_ack_block *gap_descriptor;
10348 struct sack_track *selector;
10353 int limit_reached = 0;
10354 unsigned int i, siz, j;
10355 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10358 uint32_t highest_tsn;
10363 if ((stcb->asoc.sctp_nr_sack_on_off == 1) &&
10364 (stcb->asoc.peer_supports_nr_sack == 1)) {
10365 type = SCTP_NR_SELECTIVE_ACK;
10367 type = SCTP_SELECTIVE_ACK;
10370 asoc = &stcb->asoc;
10371 SCTP_TCB_LOCK_ASSERT(stcb);
10372 if (asoc->last_data_chunk_from == NULL) {
10373 /* Hmm we never received anything */
10376 sctp_slide_mapping_arrays(stcb);
10377 sctp_set_rwnd(stcb, asoc);
10378 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10379 if (chk->rec.chunk_id.id == type) {
10380 /* Hmm, found a sack already on queue, remove it */
10381 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10382 asoc->ctrl_queue_cnt--;
10385 sctp_m_freem(a_chk->data);
10386 a_chk->data = NULL;
10388 if (a_chk->whoTo) {
10389 sctp_free_remote_addr(a_chk->whoTo);
10390 a_chk->whoTo = NULL;
10395 if (a_chk == NULL) {
10396 sctp_alloc_a_chunk(stcb, a_chk);
10397 if (a_chk == NULL) {
10398 /* No memory so we drop the idea, and set a timer */
10399 if (stcb->asoc.delayed_ack) {
10400 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10401 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10402 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10403 stcb->sctp_ep, stcb, NULL);
10405 stcb->asoc.send_sack = 1;
10409 a_chk->copy_by_ref = 0;
10410 a_chk->rec.chunk_id.id = type;
10411 a_chk->rec.chunk_id.can_take_data = 1;
10413 /* Clear our pkt counts */
10414 asoc->data_pkts_seen = 0;
10416 a_chk->asoc = asoc;
10417 a_chk->snd_count = 0;
10418 a_chk->send_size = 0; /* fill in later */
10419 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10420 a_chk->whoTo = NULL;
10422 if ((asoc->numduptsns) ||
10423 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) {
10425 * Ok, we have some duplicates or the destination for the
10426 * sack is unreachable, lets see if we can select an
10427 * alternate than asoc->last_data_chunk_from
10429 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) &&
10430 (asoc->used_alt_onsack > asoc->numnets)) {
10431 /* We used an alt last time, don't this time */
10432 a_chk->whoTo = NULL;
10434 asoc->used_alt_onsack++;
10435 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10437 if (a_chk->whoTo == NULL) {
10438 /* Nope, no alternate */
10439 a_chk->whoTo = asoc->last_data_chunk_from;
10440 asoc->used_alt_onsack = 0;
10444 * No duplicates so we use the last place we received data
10447 asoc->used_alt_onsack = 0;
10448 a_chk->whoTo = asoc->last_data_chunk_from;
10450 if (a_chk->whoTo) {
10451 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10453 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10454 highest_tsn = asoc->highest_tsn_inside_map;
10456 highest_tsn = asoc->highest_tsn_inside_nr_map;
10458 if (highest_tsn == asoc->cumulative_tsn) {
10460 if (type == SCTP_SELECTIVE_ACK) {
10461 space_req = sizeof(struct sctp_sack_chunk);
10463 space_req = sizeof(struct sctp_nr_sack_chunk);
10466 /* gaps get a cluster */
10467 space_req = MCLBYTES;
10469 /* Ok now lets formulate a MBUF with our sack */
10470 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_DONTWAIT, 1, MT_DATA);
10471 if ((a_chk->data == NULL) ||
10472 (a_chk->whoTo == NULL)) {
10473 /* rats, no mbuf memory */
10475 /* was a problem with the destination */
10476 sctp_m_freem(a_chk->data);
10477 a_chk->data = NULL;
10479 sctp_free_a_chunk(stcb, a_chk, so_locked);
10480 /* sa_ignore NO_NULL_CHK */
10481 if (stcb->asoc.delayed_ack) {
10482 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10483 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
10484 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10485 stcb->sctp_ep, stcb, NULL);
10487 stcb->asoc.send_sack = 1;
10491 /* ok, lets go through and fill it in */
10492 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10493 space = M_TRAILINGSPACE(a_chk->data);
10494 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10495 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10497 limit = mtod(a_chk->data, caddr_t);
10502 if ((asoc->sctp_cmt_on_off > 0) &&
10503 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10505 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10506 * received, then set high bit to 1, else 0. Reset
10509 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10510 asoc->cmt_dac_pkts_rcvd = 0;
10512 #ifdef SCTP_ASOCLOG_OF_TSNS
10513 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10514 stcb->asoc.cumack_log_atsnt++;
10515 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10516 stcb->asoc.cumack_log_atsnt = 0;
10519 /* reset the readers interpretation */
10520 stcb->freed_by_sorcv_sincelast = 0;
10522 if (type == SCTP_SELECTIVE_ACK) {
10523 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10525 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10526 if (highest_tsn > asoc->mapping_array_base_tsn) {
10527 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10529 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10533 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10534 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10535 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10536 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10538 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10542 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10545 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10547 if (((type == SCTP_SELECTIVE_ACK) &&
10548 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10549 ((type == SCTP_NR_SELECTIVE_ACK) &&
10550 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10551 /* we have a gap .. maybe */
10552 for (i = 0; i < siz; i++) {
10553 tsn_map = asoc->mapping_array[i];
10554 if (type == SCTP_SELECTIVE_ACK) {
10555 tsn_map |= asoc->nr_mapping_array[i];
10559 * Clear all bits corresponding to TSNs
10560 * smaller or equal to the cumulative TSN.
10562 tsn_map &= (~0 << (1 - offset));
10564 selector = &sack_array[tsn_map];
10565 if (mergeable && selector->right_edge) {
10567 * Backup, left and right edges were ok to
10573 if (selector->num_entries == 0)
10576 for (j = 0; j < selector->num_entries; j++) {
10577 if (mergeable && selector->right_edge) {
10579 * do a merge by NOT setting
10585 * no merge, set the left
10589 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10591 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10594 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10600 if (selector->left_edge) {
10604 if (limit_reached) {
10605 /* Reached the limit stop */
10611 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10612 (limit_reached == 0)) {
10616 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10617 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10619 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10622 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10625 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10627 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10628 /* we have a gap .. maybe */
10629 for (i = 0; i < siz; i++) {
10630 tsn_map = asoc->nr_mapping_array[i];
10633 * Clear all bits corresponding to
10634 * TSNs smaller or equal to the
10637 tsn_map &= (~0 << (1 - offset));
10639 selector = &sack_array[tsn_map];
10640 if (mergeable && selector->right_edge) {
10642 * Backup, left and right edges were
10645 num_nr_gap_blocks--;
10648 if (selector->num_entries == 0)
10651 for (j = 0; j < selector->num_entries; j++) {
10652 if (mergeable && selector->right_edge) {
10654 * do a merge by NOT
10661 * no merge, set the
10665 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10667 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10668 num_nr_gap_blocks++;
10670 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10676 if (selector->left_edge) {
10680 if (limit_reached) {
10681 /* Reached the limit stop */
10688 /* now we must add any dups we are going to report. */
10689 if ((limit_reached == 0) && (asoc->numduptsns)) {
10690 dup = (uint32_t *) gap_descriptor;
10691 for (i = 0; i < asoc->numduptsns; i++) {
10692 *dup = htonl(asoc->dup_tsns[i]);
10695 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10700 asoc->numduptsns = 0;
10703 * now that the chunk is prepared queue it to the control chunk
10706 if (type == SCTP_SELECTIVE_ACK) {
10707 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10708 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10709 num_dups * sizeof(int32_t);
10710 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10711 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10712 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10713 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10714 sack->sack.num_dup_tsns = htons(num_dups);
10715 sack->ch.chunk_type = type;
10716 sack->ch.chunk_flags = flags;
10717 sack->ch.chunk_length = htons(a_chk->send_size);
10719 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10720 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10721 num_dups * sizeof(int32_t);
10722 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10723 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10724 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10725 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10726 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10727 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10728 nr_sack->nr_sack.reserved = 0;
10729 nr_sack->ch.chunk_type = type;
10730 nr_sack->ch.chunk_flags = flags;
10731 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10733 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10734 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10735 asoc->ctrl_queue_cnt++;
10736 asoc->send_sack = 0;
10737 SCTP_STAT_INCR(sctps_sendsacks);
10742 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10743 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10748 struct mbuf *m_abort;
10749 struct mbuf *m_out = NULL, *m_end = NULL;
10750 struct sctp_abort_chunk *abort = NULL;
10752 uint32_t auth_offset = 0;
10753 struct sctp_auth_chunk *auth = NULL;
10754 struct sctp_nets *net;
10757 * Add an AUTH chunk, if chunk requires it and save the offset into
10758 * the chain for AUTH
10760 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10761 stcb->asoc.peer_auth_chunks)) {
10762 m_out = sctp_add_auth_chunk(m_out, &m_end, &auth, &auth_offset,
10763 stcb, SCTP_ABORT_ASSOCIATION);
10764 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10766 SCTP_TCB_LOCK_ASSERT(stcb);
10767 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
10768 if (m_abort == NULL) {
10771 sctp_m_freem(m_out);
10774 /* link in any error */
10775 SCTP_BUF_NEXT(m_abort) = operr;
10782 sz += SCTP_BUF_LEN(n);
10783 n = SCTP_BUF_NEXT(n);
10786 SCTP_BUF_LEN(m_abort) = sizeof(*abort);
10787 if (m_out == NULL) {
10788 /* NO Auth chunk prepended, so reserve space in front */
10789 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10792 /* Put AUTH chunk at the front of the chain */
10793 SCTP_BUF_NEXT(m_end) = m_abort;
10795 if (stcb->asoc.alternate) {
10796 net = stcb->asoc.alternate;
10798 net = stcb->asoc.primary_destination;
10800 /* fill in the ABORT chunk */
10801 abort = mtod(m_abort, struct sctp_abort_chunk *);
10802 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10803 abort->ch.chunk_flags = 0;
10804 abort->ch.chunk_length = htons(sizeof(*abort) + sz);
10806 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10807 (struct sockaddr *)&net->ro._l_addr,
10808 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, NULL, 0,
10809 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
10810 stcb->asoc.primary_destination->port, so_locked, NULL, NULL);
10811 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10815 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10816 struct sctp_nets *net,
10819 /* formulate and SEND a SHUTDOWN-COMPLETE */
10820 struct mbuf *m_shutdown_comp;
10821 struct sctp_shutdown_complete_chunk *shutdown_complete;
10825 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
10826 if (m_shutdown_comp == NULL) {
10830 if (reflect_vtag) {
10831 flags = SCTP_HAD_NO_TCB;
10832 vtag = stcb->asoc.my_vtag;
10835 vtag = stcb->asoc.peer_vtag;
10837 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10838 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10839 shutdown_complete->ch.chunk_flags = flags;
10840 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10841 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10842 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10843 (struct sockaddr *)&net->ro._l_addr,
10844 m_shutdown_comp, 0, NULL, 0, 1, 0, NULL, 0,
10845 stcb->sctp_ep->sctp_lport, stcb->rport,
10847 net->port, SCTP_SO_NOT_LOCKED, NULL, NULL);
10848 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10853 sctp_send_shutdown_complete2(struct mbuf *m, int iphlen, struct sctphdr *sh,
10854 uint32_t vrf_id, uint16_t port)
10856 /* formulate and SEND a SHUTDOWN-COMPLETE */
10857 struct mbuf *o_pak;
10860 struct udphdr *udp = NULL;
10861 int offset_out, len, mlen;
10862 struct sctp_shutdown_complete_msg *comp_cp;
10865 struct ip *iph_out;
10869 struct ip6_hdr *ip6, *ip6_out;
10873 iph = mtod(m, struct ip *);
10874 switch (iph->ip_v) {
10877 len = (sizeof(struct ip) + sizeof(struct sctp_shutdown_complete_msg));
10881 case IPV6_VERSION >> 4:
10882 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_shutdown_complete_msg));
10889 len += sizeof(struct udphdr);
10891 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
10892 if (mout == NULL) {
10895 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10896 SCTP_BUF_LEN(mout) = len;
10897 SCTP_BUF_NEXT(mout) = NULL;
10898 if (m->m_flags & M_FLOWID) {
10899 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
10900 mout->m_flags |= M_FLOWID;
10910 switch (iph->ip_v) {
10913 iph_out = mtod(mout, struct ip *);
10915 /* Fill in the IP header for the ABORT */
10916 iph_out->ip_v = IPVERSION;
10917 iph_out->ip_hl = (sizeof(struct ip) / 4);
10918 iph_out->ip_tos = (u_char)0;
10919 iph_out->ip_id = 0;
10920 iph_out->ip_off = 0;
10921 iph_out->ip_ttl = MAXTTL;
10923 iph_out->ip_p = IPPROTO_UDP;
10925 iph_out->ip_p = IPPROTO_SCTP;
10927 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
10928 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
10930 /* let IP layer calculate this */
10931 iph_out->ip_sum = 0;
10932 offset_out += sizeof(*iph_out);
10933 comp_cp = (struct sctp_shutdown_complete_msg *)(
10934 (caddr_t)iph_out + offset_out);
10938 case IPV6_VERSION >> 4:
10939 ip6 = (struct ip6_hdr *)iph;
10940 ip6_out = mtod(mout, struct ip6_hdr *);
10942 /* Fill in the IPv6 header for the ABORT */
10943 ip6_out->ip6_flow = ip6->ip6_flow;
10944 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
10946 ip6_out->ip6_nxt = IPPROTO_UDP;
10948 ip6_out->ip6_nxt = IPPROTO_SCTP;
10950 ip6_out->ip6_src = ip6->ip6_dst;
10951 ip6_out->ip6_dst = ip6->ip6_src;
10953 * ?? The old code had both the iph len + payload, I think
10954 * this is wrong and would never have worked
10956 ip6_out->ip6_plen = sizeof(struct sctp_shutdown_complete_msg);
10957 offset_out += sizeof(*ip6_out);
10958 comp_cp = (struct sctp_shutdown_complete_msg *)(
10959 (caddr_t)ip6_out + offset_out);
10963 /* Currently not supported. */
10964 sctp_m_freem(mout);
10968 udp = (struct udphdr *)comp_cp;
10969 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
10970 udp->uh_dport = port;
10971 udp->uh_ulen = htons(sizeof(struct sctp_shutdown_complete_msg) + sizeof(struct udphdr));
10974 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
10976 offset_out += sizeof(struct udphdr);
10977 comp_cp = (struct sctp_shutdown_complete_msg *)((caddr_t)comp_cp + sizeof(struct udphdr));
10979 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
10981 sctp_m_freem(mout);
10984 /* Now copy in and fill in the ABORT tags etc. */
10985 comp_cp->sh.src_port = sh->dest_port;
10986 comp_cp->sh.dest_port = sh->src_port;
10987 comp_cp->sh.checksum = 0;
10988 comp_cp->sh.v_tag = sh->v_tag;
10989 comp_cp->shut_cmp.ch.chunk_flags = SCTP_HAD_NO_TCB;
10990 comp_cp->shut_cmp.ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10991 comp_cp->shut_cmp.ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10994 if (iph_out != NULL) {
10998 mlen = SCTP_BUF_LEN(mout);
10999 bzero(&ro, sizeof ro);
11000 /* set IPv4 length */
11001 iph_out->ip_len = mlen;
11002 #ifdef SCTP_PACKET_LOGGING
11003 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11004 sctp_packet_log(mout, mlen);
11007 #if defined(SCTP_WITH_NO_CSUM)
11008 SCTP_STAT_INCR(sctps_sendnocrc);
11010 comp_cp->sh.checksum = sctp_calculate_cksum(mout, offset_out);
11011 SCTP_STAT_INCR(sctps_sendswcrc);
11013 SCTP_ENABLE_UDP_CSUM(mout);
11015 #if defined(SCTP_WITH_NO_CSUM)
11016 SCTP_STAT_INCR(sctps_sendnocrc);
11018 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11019 mout->m_pkthdr.csum_data = 0;
11020 SCTP_STAT_INCR(sctps_sendhwcrc);
11023 SCTP_ATTACH_CHAIN(o_pak, mout, mlen);
11025 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
11027 /* Free the route if we got one back */
11033 if (ip6_out != NULL) {
11034 struct route_in6 ro;
11036 struct ifnet *ifp = NULL;
11038 bzero(&ro, sizeof(ro));
11039 mlen = SCTP_BUF_LEN(mout);
11040 #ifdef SCTP_PACKET_LOGGING
11041 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11042 sctp_packet_log(mout, mlen);
11044 SCTP_ATTACH_CHAIN(o_pak, mout, mlen);
11046 #if defined(SCTP_WITH_NO_CSUM)
11047 SCTP_STAT_INCR(sctps_sendnocrc);
11049 comp_cp->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11050 SCTP_STAT_INCR(sctps_sendswcrc);
11052 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), mlen - sizeof(struct ip6_hdr))) == 0) {
11053 udp->uh_sum = 0xffff;
11056 #if defined(SCTP_WITH_NO_CSUM)
11057 SCTP_STAT_INCR(sctps_sendnocrc);
11059 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11060 mout->m_pkthdr.csum_data = 0;
11061 SCTP_STAT_INCR(sctps_sendhwcrc);
11064 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
11066 /* Free the route if we got one back */
11071 SCTP_STAT_INCR(sctps_sendpackets);
11072 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11073 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11079 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11080 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11085 struct sctp_tmit_chunk *chk;
11086 struct sctp_heartbeat_chunk *hb;
11087 struct timeval now;
11089 SCTP_TCB_LOCK_ASSERT(stcb);
11093 (void)SCTP_GETTIME_TIMEVAL(&now);
11094 switch (net->ro._l_addr.sa.sa_family) {
11106 sctp_alloc_a_chunk(stcb, chk);
11108 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11111 chk->copy_by_ref = 0;
11112 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11113 chk->rec.chunk_id.can_take_data = 1;
11114 chk->asoc = &stcb->asoc;
11115 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11117 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11118 if (chk->data == NULL) {
11119 sctp_free_a_chunk(stcb, chk, so_locked);
11122 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11123 SCTP_BUF_LEN(chk->data) = chk->send_size;
11124 chk->sent = SCTP_DATAGRAM_UNSENT;
11125 chk->snd_count = 0;
11127 atomic_add_int(&chk->whoTo->ref_count, 1);
11128 /* Now we have a mbuf that we can fill in with the details */
11129 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11130 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11131 /* fill out chunk header */
11132 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11133 hb->ch.chunk_flags = 0;
11134 hb->ch.chunk_length = htons(chk->send_size);
11135 /* Fill out hb parameter */
11136 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11137 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11138 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11139 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11140 /* Did our user request this one, put it in */
11141 hb->heartbeat.hb_info.addr_family = net->ro._l_addr.sa.sa_family;
11142 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11143 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11145 * we only take from the entropy pool if the address is not
11148 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11149 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11151 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11152 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11154 switch (net->ro._l_addr.sa.sa_family) {
11157 memcpy(hb->heartbeat.hb_info.address,
11158 &net->ro._l_addr.sin.sin_addr,
11159 sizeof(net->ro._l_addr.sin.sin_addr));
11164 memcpy(hb->heartbeat.hb_info.address,
11165 &net->ro._l_addr.sin6.sin6_addr,
11166 sizeof(net->ro._l_addr.sin6.sin6_addr));
11173 net->hb_responded = 0;
11174 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11175 stcb->asoc.ctrl_queue_cnt++;
11176 SCTP_STAT_INCR(sctps_sendheartbeat);
11181 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11184 struct sctp_association *asoc;
11185 struct sctp_ecne_chunk *ecne;
11186 struct sctp_tmit_chunk *chk;
11191 asoc = &stcb->asoc;
11192 SCTP_TCB_LOCK_ASSERT(stcb);
11193 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11194 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11195 /* found a previous ECN_ECHO update it if needed */
11196 uint32_t cnt, ctsn;
11198 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11199 ctsn = ntohl(ecne->tsn);
11200 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11201 ecne->tsn = htonl(high_tsn);
11202 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11204 cnt = ntohl(ecne->num_pkts_since_cwr);
11206 ecne->num_pkts_since_cwr = htonl(cnt);
11210 /* nope could not find one to update so we must build one */
11211 sctp_alloc_a_chunk(stcb, chk);
11215 chk->copy_by_ref = 0;
11216 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11217 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11218 chk->rec.chunk_id.can_take_data = 0;
11219 chk->asoc = &stcb->asoc;
11220 chk->send_size = sizeof(struct sctp_ecne_chunk);
11221 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11222 if (chk->data == NULL) {
11223 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11226 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11227 SCTP_BUF_LEN(chk->data) = chk->send_size;
11228 chk->sent = SCTP_DATAGRAM_UNSENT;
11229 chk->snd_count = 0;
11231 atomic_add_int(&chk->whoTo->ref_count, 1);
11233 stcb->asoc.ecn_echo_cnt_onq++;
11234 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11235 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11236 ecne->ch.chunk_flags = 0;
11237 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11238 ecne->tsn = htonl(high_tsn);
11239 ecne->num_pkts_since_cwr = htonl(1);
11240 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11241 asoc->ctrl_queue_cnt++;
11245 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11246 struct mbuf *m, int iphlen, int bad_crc)
11248 struct sctp_association *asoc;
11249 struct sctp_pktdrop_chunk *drp;
11250 struct sctp_tmit_chunk *chk;
11257 struct ip6_hdr *ip6h;
11260 int fullsz = 0, extra = 0;
11263 struct sctp_chunkhdr *ch, chunk_buf;
11264 unsigned int chk_length;
11269 asoc = &stcb->asoc;
11270 SCTP_TCB_LOCK_ASSERT(stcb);
11271 if (asoc->peer_supports_pktdrop == 0) {
11273 * peer must declare support before I send one.
11277 if (stcb->sctp_socket == NULL) {
11280 sctp_alloc_a_chunk(stcb, chk);
11284 chk->copy_by_ref = 0;
11285 iph = mtod(m, struct ip *);
11287 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11290 switch (iph->ip_v) {
11294 len = chk->send_size = iph->ip_len;
11298 case IPV6_VERSION >> 4:
11300 ip6h = mtod(m, struct ip6_hdr *);
11301 len = chk->send_size = htons(ip6h->ip6_plen);
11307 /* Validate that we do not have an ABORT in here. */
11308 offset = iphlen + sizeof(struct sctphdr);
11309 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11310 sizeof(*ch), (uint8_t *) & chunk_buf);
11311 while (ch != NULL) {
11312 chk_length = ntohs(ch->chunk_length);
11313 if (chk_length < sizeof(*ch)) {
11314 /* break to abort land */
11317 switch (ch->chunk_type) {
11318 case SCTP_PACKET_DROPPED:
11319 case SCTP_ABORT_ASSOCIATION:
11320 case SCTP_INITIATION_ACK:
11322 * We don't respond with an PKT-DROP to an ABORT
11323 * or PKT-DROP. We also do not respond to an
11324 * INIT-ACK, because we can't know if the initiation
11325 * tag is correct or not.
11327 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11332 offset += SCTP_SIZE32(chk_length);
11333 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11334 sizeof(*ch), (uint8_t *) & chunk_buf);
11337 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11338 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11340 * only send 1 mtu worth, trim off the excess on the end.
11342 fullsz = len - extra;
11343 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11346 chk->asoc = &stcb->asoc;
11347 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11348 if (chk->data == NULL) {
11350 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11353 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11354 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11356 sctp_m_freem(chk->data);
11360 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11361 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11362 chk->book_size_scale = 0;
11364 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11365 drp->trunc_len = htons(fullsz);
11367 * Len is already adjusted to size minus overhead above take
11368 * out the pkt_drop chunk itself from it.
11370 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11371 len = chk->send_size;
11373 /* no truncation needed */
11374 drp->ch.chunk_flags = 0;
11375 drp->trunc_len = htons(0);
11378 drp->ch.chunk_flags |= SCTP_BADCRC;
11380 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11381 SCTP_BUF_LEN(chk->data) = chk->send_size;
11382 chk->sent = SCTP_DATAGRAM_UNSENT;
11383 chk->snd_count = 0;
11385 /* we should hit here */
11387 atomic_add_int(&chk->whoTo->ref_count, 1);
11391 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11392 chk->rec.chunk_id.can_take_data = 1;
11393 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11394 drp->ch.chunk_length = htons(chk->send_size);
11395 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11399 drp->bottle_bw = htonl(spc);
11400 if (asoc->my_rwnd) {
11401 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11402 asoc->size_on_all_streams +
11403 asoc->my_rwnd_control_len +
11404 stcb->sctp_socket->so_rcv.sb_cc);
11407 * If my rwnd is 0, possibly from mbuf depletion as well as
11408 * space used, tell the peer there is NO space aka onq == bw
11410 drp->current_onq = htonl(spc);
11414 m_copydata(m, iphlen, len, (caddr_t)datap);
11415 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11416 asoc->ctrl_queue_cnt++;
11420 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11422 struct sctp_association *asoc;
11423 struct sctp_cwr_chunk *cwr;
11424 struct sctp_tmit_chunk *chk;
11426 asoc = &stcb->asoc;
11427 SCTP_TCB_LOCK_ASSERT(stcb);
11431 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11432 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11434 * found a previous CWR queued to same destination
11435 * update it if needed
11439 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11440 ctsn = ntohl(cwr->tsn);
11441 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11442 cwr->tsn = htonl(high_tsn);
11444 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11445 /* Make sure override is carried */
11446 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11451 sctp_alloc_a_chunk(stcb, chk);
11455 chk->copy_by_ref = 0;
11456 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11457 chk->rec.chunk_id.can_take_data = 1;
11458 chk->asoc = &stcb->asoc;
11459 chk->send_size = sizeof(struct sctp_cwr_chunk);
11460 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11461 if (chk->data == NULL) {
11462 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11465 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11466 SCTP_BUF_LEN(chk->data) = chk->send_size;
11467 chk->sent = SCTP_DATAGRAM_UNSENT;
11468 chk->snd_count = 0;
11470 atomic_add_int(&chk->whoTo->ref_count, 1);
11471 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11472 cwr->ch.chunk_type = SCTP_ECN_CWR;
11473 cwr->ch.chunk_flags = override;
11474 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11475 cwr->tsn = htonl(high_tsn);
11476 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11477 asoc->ctrl_queue_cnt++;
11481 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11482 int number_entries, uint16_t * list,
11483 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11485 int len, old_len, i;
11486 struct sctp_stream_reset_out_request *req_out;
11487 struct sctp_chunkhdr *ch;
11489 ch = mtod(chk->data, struct sctp_chunkhdr *);
11492 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11494 /* get to new offset for the param. */
11495 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11496 /* now how long will this param be? */
11497 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11498 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11499 req_out->ph.param_length = htons(len);
11500 req_out->request_seq = htonl(seq);
11501 req_out->response_seq = htonl(resp_seq);
11502 req_out->send_reset_at_tsn = htonl(last_sent);
11503 if (number_entries) {
11504 for (i = 0; i < number_entries; i++) {
11505 req_out->list_of_streams[i] = htons(list[i]);
11508 if (SCTP_SIZE32(len) > len) {
11510 * Need to worry about the pad we may end up adding to the
11511 * end. This is easy since the struct is either aligned to 4
11512 * bytes or 2 bytes off.
11514 req_out->list_of_streams[number_entries] = 0;
11516 /* now fix the chunk length */
11517 ch->chunk_length = htons(len + old_len);
11518 chk->book_size = len + old_len;
11519 chk->book_size_scale = 0;
11520 chk->send_size = SCTP_SIZE32(chk->book_size);
11521 SCTP_BUF_LEN(chk->data) = chk->send_size;
11527 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11528 int number_entries, uint16_t * list,
11531 int len, old_len, i;
11532 struct sctp_stream_reset_in_request *req_in;
11533 struct sctp_chunkhdr *ch;
11535 ch = mtod(chk->data, struct sctp_chunkhdr *);
11538 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11540 /* get to new offset for the param. */
11541 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11542 /* now how long will this param be? */
11543 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11544 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11545 req_in->ph.param_length = htons(len);
11546 req_in->request_seq = htonl(seq);
11547 if (number_entries) {
11548 for (i = 0; i < number_entries; i++) {
11549 req_in->list_of_streams[i] = htons(list[i]);
11552 if (SCTP_SIZE32(len) > len) {
11554 * Need to worry about the pad we may end up adding to the
11555 * end. This is easy since the struct is either aligned to 4
11556 * bytes or 2 bytes off.
11558 req_in->list_of_streams[number_entries] = 0;
11560 /* now fix the chunk length */
11561 ch->chunk_length = htons(len + old_len);
11562 chk->book_size = len + old_len;
11563 chk->book_size_scale = 0;
11564 chk->send_size = SCTP_SIZE32(chk->book_size);
11565 SCTP_BUF_LEN(chk->data) = chk->send_size;
11571 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11575 struct sctp_stream_reset_tsn_request *req_tsn;
11576 struct sctp_chunkhdr *ch;
11578 ch = mtod(chk->data, struct sctp_chunkhdr *);
11581 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11583 /* get to new offset for the param. */
11584 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11585 /* now how long will this param be? */
11586 len = sizeof(struct sctp_stream_reset_tsn_request);
11587 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11588 req_tsn->ph.param_length = htons(len);
11589 req_tsn->request_seq = htonl(seq);
11591 /* now fix the chunk length */
11592 ch->chunk_length = htons(len + old_len);
11593 chk->send_size = len + old_len;
11594 chk->book_size = SCTP_SIZE32(chk->send_size);
11595 chk->book_size_scale = 0;
11596 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11601 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11602 uint32_t resp_seq, uint32_t result)
11605 struct sctp_stream_reset_response *resp;
11606 struct sctp_chunkhdr *ch;
11608 ch = mtod(chk->data, struct sctp_chunkhdr *);
11611 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11613 /* get to new offset for the param. */
11614 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11615 /* now how long will this param be? */
11616 len = sizeof(struct sctp_stream_reset_response);
11617 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11618 resp->ph.param_length = htons(len);
11619 resp->response_seq = htonl(resp_seq);
11620 resp->result = ntohl(result);
11622 /* now fix the chunk length */
11623 ch->chunk_length = htons(len + old_len);
11624 chk->book_size = len + old_len;
11625 chk->book_size_scale = 0;
11626 chk->send_size = SCTP_SIZE32(chk->book_size);
11627 SCTP_BUF_LEN(chk->data) = chk->send_size;
11634 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11635 uint32_t resp_seq, uint32_t result,
11636 uint32_t send_una, uint32_t recv_next)
11639 struct sctp_stream_reset_response_tsn *resp;
11640 struct sctp_chunkhdr *ch;
11642 ch = mtod(chk->data, struct sctp_chunkhdr *);
11645 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11647 /* get to new offset for the param. */
11648 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11649 /* now how long will this param be? */
11650 len = sizeof(struct sctp_stream_reset_response_tsn);
11651 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11652 resp->ph.param_length = htons(len);
11653 resp->response_seq = htonl(resp_seq);
11654 resp->result = htonl(result);
11655 resp->senders_next_tsn = htonl(send_una);
11656 resp->receivers_next_tsn = htonl(recv_next);
11658 /* now fix the chunk length */
11659 ch->chunk_length = htons(len + old_len);
11660 chk->book_size = len + old_len;
11661 chk->send_size = SCTP_SIZE32(chk->book_size);
11662 chk->book_size_scale = 0;
11663 SCTP_BUF_LEN(chk->data) = chk->send_size;
11668 sctp_add_a_stream(struct sctp_tmit_chunk *chk,
11673 struct sctp_chunkhdr *ch;
11674 struct sctp_stream_reset_add_strm *addstr;
11676 ch = mtod(chk->data, struct sctp_chunkhdr *);
11677 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11679 /* get to new offset for the param. */
11680 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11681 /* now how long will this param be? */
11682 len = sizeof(struct sctp_stream_reset_add_strm);
11685 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_STREAMS);
11686 addstr->ph.param_length = htons(len);
11687 addstr->request_seq = htonl(seq);
11688 addstr->number_of_streams = htons(adding);
11689 addstr->reserved = 0;
11691 /* now fix the chunk length */
11692 ch->chunk_length = htons(len + old_len);
11693 chk->send_size = len + old_len;
11694 chk->book_size = SCTP_SIZE32(chk->send_size);
11695 chk->book_size_scale = 0;
11696 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11701 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11702 int number_entries, uint16_t * list,
11703 uint8_t send_out_req,
11705 uint8_t send_in_req,
11706 uint8_t send_tsn_req,
11707 uint8_t add_stream,
11712 struct sctp_association *asoc;
11713 struct sctp_tmit_chunk *chk;
11714 struct sctp_chunkhdr *ch;
11717 asoc = &stcb->asoc;
11718 if (asoc->stream_reset_outstanding) {
11720 * Already one pending, must get ACK back to clear the flag.
11722 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11725 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11726 (add_stream == 0)) {
11727 /* nothing to do */
11728 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11731 if (send_tsn_req && (send_out_req || send_in_req)) {
11732 /* error, can't do that */
11733 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11736 sctp_alloc_a_chunk(stcb, chk);
11738 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11741 chk->copy_by_ref = 0;
11742 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11743 chk->rec.chunk_id.can_take_data = 0;
11744 chk->asoc = &stcb->asoc;
11745 chk->book_size = sizeof(struct sctp_chunkhdr);
11746 chk->send_size = SCTP_SIZE32(chk->book_size);
11747 chk->book_size_scale = 0;
11749 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11750 if (chk->data == NULL) {
11751 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11752 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11755 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11757 /* setup chunk parameters */
11758 chk->sent = SCTP_DATAGRAM_UNSENT;
11759 chk->snd_count = 0;
11760 if (stcb->asoc.alternate) {
11761 chk->whoTo = stcb->asoc.alternate;
11763 chk->whoTo = stcb->asoc.primary_destination;
11765 atomic_add_int(&chk->whoTo->ref_count, 1);
11766 ch = mtod(chk->data, struct sctp_chunkhdr *);
11767 ch->chunk_type = SCTP_STREAM_RESET;
11768 ch->chunk_flags = 0;
11769 ch->chunk_length = htons(chk->book_size);
11770 SCTP_BUF_LEN(chk->data) = chk->send_size;
11772 seq = stcb->asoc.str_reset_seq_out;
11773 if (send_out_req) {
11774 sctp_add_stream_reset_out(chk, number_entries, list,
11775 seq, resp_seq, (stcb->asoc.sending_seq - 1));
11776 asoc->stream_reset_out_is_outstanding = 1;
11778 asoc->stream_reset_outstanding++;
11781 sctp_add_a_stream(chk, seq, adding);
11783 asoc->stream_reset_outstanding++;
11786 sctp_add_stream_reset_in(chk, number_entries, list, seq);
11787 asoc->stream_reset_outstanding++;
11789 if (send_tsn_req) {
11790 sctp_add_stream_reset_tsn(chk, seq);
11791 asoc->stream_reset_outstanding++;
11793 asoc->str_reset = chk;
11795 /* insert the chunk for sending */
11796 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11799 asoc->ctrl_queue_cnt++;
11800 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11805 sctp_send_abort(struct mbuf *m, int iphlen, struct sctphdr *sh, uint32_t vtag,
11806 struct mbuf *err_cause, uint32_t vrf_id, uint16_t port)
11809 * Formulate the abort message, and send it back down.
11811 struct mbuf *o_pak;
11813 struct sctp_abort_msg *abm;
11815 struct udphdr *udp;
11816 int iphlen_out, len;
11819 struct ip *iph_out;
11823 struct ip6_hdr *ip6, *ip6_out;
11827 /* don't respond to ABORT with ABORT */
11828 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
11830 sctp_m_freem(err_cause);
11833 iph = mtod(m, struct ip *);
11834 switch (iph->ip_v) {
11837 len = (sizeof(struct ip) + sizeof(struct sctp_abort_msg));
11841 case IPV6_VERSION >> 4:
11842 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_abort_msg));
11847 sctp_m_freem(err_cause);
11852 len += sizeof(struct udphdr);
11854 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
11855 if (mout == NULL) {
11857 sctp_m_freem(err_cause);
11861 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11862 SCTP_BUF_LEN(mout) = len;
11863 SCTP_BUF_NEXT(mout) = err_cause;
11864 if (m->m_flags & M_FLOWID) {
11865 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
11866 mout->m_flags |= M_FLOWID;
11874 switch (iph->ip_v) {
11877 iph_out = mtod(mout, struct ip *);
11879 /* Fill in the IP header for the ABORT */
11880 iph_out->ip_v = IPVERSION;
11881 iph_out->ip_hl = (sizeof(struct ip) / 4);
11882 iph_out->ip_tos = (u_char)0;
11883 iph_out->ip_id = 0;
11884 iph_out->ip_off = 0;
11885 iph_out->ip_ttl = MAXTTL;
11887 iph_out->ip_p = IPPROTO_UDP;
11889 iph_out->ip_p = IPPROTO_SCTP;
11891 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
11892 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
11893 /* let IP layer calculate this */
11894 iph_out->ip_sum = 0;
11896 iphlen_out = sizeof(*iph_out);
11897 abm = (struct sctp_abort_msg *)((caddr_t)iph_out + iphlen_out);
11901 case IPV6_VERSION >> 4:
11902 ip6 = (struct ip6_hdr *)iph;
11903 ip6_out = mtod(mout, struct ip6_hdr *);
11905 /* Fill in the IP6 header for the ABORT */
11906 ip6_out->ip6_flow = ip6->ip6_flow;
11907 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11909 ip6_out->ip6_nxt = IPPROTO_UDP;
11911 ip6_out->ip6_nxt = IPPROTO_SCTP;
11913 ip6_out->ip6_src = ip6->ip6_dst;
11914 ip6_out->ip6_dst = ip6->ip6_src;
11916 iphlen_out = sizeof(*ip6_out);
11917 abm = (struct sctp_abort_msg *)((caddr_t)ip6_out + iphlen_out);
11921 /* Currently not supported */
11922 sctp_m_freem(mout);
11926 udp = (struct udphdr *)abm;
11928 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11929 udp->uh_dport = port;
11930 /* set udp->uh_ulen later */
11932 iphlen_out += sizeof(struct udphdr);
11933 abm = (struct sctp_abort_msg *)((caddr_t)abm + sizeof(struct udphdr));
11935 abm->sh.src_port = sh->dest_port;
11936 abm->sh.dest_port = sh->src_port;
11937 abm->sh.checksum = 0;
11939 abm->sh.v_tag = sh->v_tag;
11940 abm->msg.ch.chunk_flags = SCTP_HAD_NO_TCB;
11942 abm->sh.v_tag = htonl(vtag);
11943 abm->msg.ch.chunk_flags = 0;
11945 abm->msg.ch.chunk_type = SCTP_ABORT_ASSOCIATION;
11948 struct mbuf *m_tmp = err_cause;
11951 /* get length of the err_cause chain */
11952 while (m_tmp != NULL) {
11953 err_len += SCTP_BUF_LEN(m_tmp);
11954 m_tmp = SCTP_BUF_NEXT(m_tmp);
11956 len = SCTP_BUF_LEN(mout) + err_len;
11958 /* need pad at end of chunk */
11959 uint32_t cpthis = 0;
11962 padlen = 4 - (len % 4);
11963 m_copyback(mout, len, padlen, (caddr_t)&cpthis);
11966 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch) + err_len);
11968 len = SCTP_BUF_LEN(mout);
11969 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch));
11972 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11974 sctp_m_freem(mout);
11978 if (iph_out != NULL) {
11982 /* zap the stack pointer to the route */
11983 bzero(&ro, sizeof ro);
11985 udp->uh_ulen = htons(len - sizeof(struct ip));
11986 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11988 SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip_output:\n");
11989 SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, iph_out, &abm->sh);
11990 /* set IPv4 length */
11991 iph_out->ip_len = len;
11993 #ifdef SCTP_PACKET_LOGGING
11994 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11995 sctp_packet_log(mout, len);
11997 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11999 #if defined(SCTP_WITH_NO_CSUM)
12000 SCTP_STAT_INCR(sctps_sendnocrc);
12002 abm->sh.checksum = sctp_calculate_cksum(mout, iphlen_out);
12003 SCTP_STAT_INCR(sctps_sendswcrc);
12005 SCTP_ENABLE_UDP_CSUM(o_pak);
12007 #if defined(SCTP_WITH_NO_CSUM)
12008 SCTP_STAT_INCR(sctps_sendnocrc);
12010 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12011 mout->m_pkthdr.csum_data = 0;
12012 SCTP_STAT_INCR(sctps_sendhwcrc);
12015 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
12017 /* Free the route if we got one back */
12023 if (ip6_out != NULL) {
12024 struct route_in6 ro;
12026 struct ifnet *ifp = NULL;
12028 /* zap the stack pointer to the route */
12029 bzero(&ro, sizeof(ro));
12031 udp->uh_ulen = htons(len - sizeof(struct ip6_hdr));
12033 SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip6_output:\n");
12034 SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, (struct ip *)ip6_out, &abm->sh);
12035 ip6_out->ip6_plen = len - sizeof(*ip6_out);
12036 #ifdef SCTP_PACKET_LOGGING
12037 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12038 sctp_packet_log(mout, len);
12040 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12042 #if defined(SCTP_WITH_NO_CSUM)
12043 SCTP_STAT_INCR(sctps_sendnocrc);
12045 abm->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
12046 SCTP_STAT_INCR(sctps_sendswcrc);
12048 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
12049 udp->uh_sum = 0xffff;
12052 #if defined(SCTP_WITH_NO_CSUM)
12053 SCTP_STAT_INCR(sctps_sendnocrc);
12055 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12056 mout->m_pkthdr.csum_data = 0;
12057 SCTP_STAT_INCR(sctps_sendhwcrc);
12060 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
12062 /* Free the route if we got one back */
12067 SCTP_STAT_INCR(sctps_sendpackets);
12068 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
12069 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
12073 sctp_send_operr_to(struct mbuf *m, int iphlen, struct mbuf *scm, uint32_t vtag,
12074 uint32_t vrf_id, uint16_t port)
12076 struct mbuf *o_pak;
12077 struct sctphdr *sh, *sh_out;
12078 struct sctp_chunkhdr *ch;
12080 struct udphdr *udp = NULL;
12082 int iphlen_out, len;
12085 struct ip *iph_out;
12089 struct ip6_hdr *ip6, *ip6_out;
12093 iph = mtod(m, struct ip *);
12094 sh = (struct sctphdr *)((caddr_t)iph + iphlen);
12095 switch (iph->ip_v) {
12098 len = (sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr));
12102 case IPV6_VERSION >> 4:
12103 len = (sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr));
12113 len += sizeof(struct udphdr);
12115 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
12116 if (mout == NULL) {
12122 SCTP_BUF_RESV_UF(mout, max_linkhdr);
12123 SCTP_BUF_LEN(mout) = len;
12124 SCTP_BUF_NEXT(mout) = scm;
12125 if (m->m_flags & M_FLOWID) {
12126 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
12127 mout->m_flags |= M_FLOWID;
12135 switch (iph->ip_v) {
12138 iph_out = mtod(mout, struct ip *);
12140 /* Fill in the IP header for the ABORT */
12141 iph_out->ip_v = IPVERSION;
12142 iph_out->ip_hl = (sizeof(struct ip) / 4);
12143 iph_out->ip_tos = (u_char)0;
12144 iph_out->ip_id = 0;
12145 iph_out->ip_off = 0;
12146 iph_out->ip_ttl = MAXTTL;
12148 iph_out->ip_p = IPPROTO_UDP;
12150 iph_out->ip_p = IPPROTO_SCTP;
12152 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
12153 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
12154 /* let IP layer calculate this */
12155 iph_out->ip_sum = 0;
12157 iphlen_out = sizeof(struct ip);
12158 sh_out = (struct sctphdr *)((caddr_t)iph_out + iphlen_out);
12162 case IPV6_VERSION >> 4:
12163 ip6 = (struct ip6_hdr *)iph;
12164 ip6_out = mtod(mout, struct ip6_hdr *);
12166 /* Fill in the IP6 header for the ABORT */
12167 ip6_out->ip6_flow = ip6->ip6_flow;
12168 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
12170 ip6_out->ip6_nxt = IPPROTO_UDP;
12172 ip6_out->ip6_nxt = IPPROTO_SCTP;
12174 ip6_out->ip6_src = ip6->ip6_dst;
12175 ip6_out->ip6_dst = ip6->ip6_src;
12177 iphlen_out = sizeof(struct ip6_hdr);
12178 sh_out = (struct sctphdr *)((caddr_t)ip6_out + iphlen_out);
12182 /* Currently not supported */
12183 sctp_m_freem(mout);
12187 udp = (struct udphdr *)sh_out;
12189 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
12190 udp->uh_dport = port;
12191 /* set udp->uh_ulen later */
12193 iphlen_out += sizeof(struct udphdr);
12194 sh_out = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
12196 sh_out->src_port = sh->dest_port;
12197 sh_out->dest_port = sh->src_port;
12198 sh_out->v_tag = vtag;
12199 sh_out->checksum = 0;
12201 ch = (struct sctp_chunkhdr *)((caddr_t)sh_out + sizeof(struct sctphdr));
12202 ch->chunk_type = SCTP_OPERATION_ERROR;
12203 ch->chunk_flags = 0;
12206 struct mbuf *m_tmp = scm;
12209 /* get length of the err_cause chain */
12210 while (m_tmp != NULL) {
12211 cause_len += SCTP_BUF_LEN(m_tmp);
12212 m_tmp = SCTP_BUF_NEXT(m_tmp);
12214 len = SCTP_BUF_LEN(mout) + cause_len;
12215 if (cause_len % 4) {
12216 /* need pad at end of chunk */
12217 uint32_t cpthis = 0;
12220 padlen = 4 - (len % 4);
12221 m_copyback(mout, len, padlen, (caddr_t)&cpthis);
12224 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
12226 len = SCTP_BUF_LEN(mout);
12227 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr));
12230 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
12232 sctp_m_freem(mout);
12236 if (iph_out != NULL) {
12240 /* zap the stack pointer to the route */
12241 bzero(&ro, sizeof ro);
12243 udp->uh_ulen = htons(len - sizeof(struct ip));
12244 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
12246 /* set IPv4 length */
12247 iph_out->ip_len = len;
12249 #ifdef SCTP_PACKET_LOGGING
12250 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12251 sctp_packet_log(mout, len);
12253 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12255 #if defined(SCTP_WITH_NO_CSUM)
12256 SCTP_STAT_INCR(sctps_sendnocrc);
12258 sh_out->checksum = sctp_calculate_cksum(mout, iphlen_out);
12259 SCTP_STAT_INCR(sctps_sendswcrc);
12261 SCTP_ENABLE_UDP_CSUM(o_pak);
12263 #if defined(SCTP_WITH_NO_CSUM)
12264 SCTP_STAT_INCR(sctps_sendnocrc);
12266 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12267 mout->m_pkthdr.csum_data = 0;
12268 SCTP_STAT_INCR(sctps_sendhwcrc);
12271 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
12273 /* Free the route if we got one back */
12279 if (ip6_out != NULL) {
12280 struct route_in6 ro;
12282 struct ifnet *ifp = NULL;
12284 /* zap the stack pointer to the route */
12285 bzero(&ro, sizeof(ro));
12287 udp->uh_ulen = htons(len - sizeof(struct ip6_hdr));
12289 ip6_out->ip6_plen = len - sizeof(*ip6_out);
12290 #ifdef SCTP_PACKET_LOGGING
12291 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12292 sctp_packet_log(mout, len);
12294 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12296 #if defined(SCTP_WITH_NO_CSUM)
12297 SCTP_STAT_INCR(sctps_sendnocrc);
12299 sh_out->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
12300 SCTP_STAT_INCR(sctps_sendswcrc);
12302 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
12303 udp->uh_sum = 0xffff;
12306 #if defined(SCTP_WITH_NO_CSUM)
12307 SCTP_STAT_INCR(sctps_sendnocrc);
12309 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12310 mout->m_pkthdr.csum_data = 0;
12311 SCTP_STAT_INCR(sctps_sendhwcrc);
12314 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
12316 /* Free the route if we got one back */
12321 SCTP_STAT_INCR(sctps_sendpackets);
12322 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
12323 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
12326 static struct mbuf *
12327 sctp_copy_resume(struct sctp_stream_queue_pending *sp,
12329 struct sctp_sndrcvinfo *srcv,
12331 int user_marks_eor,
12334 struct mbuf **new_tail)
12338 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12339 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12341 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12344 *sndout = m_length(m, NULL);
12345 *new_tail = m_last(m);
12351 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12358 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12360 if (sp->data == NULL) {
12361 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12364 sp->tail_mbuf = m_last(sp->data);
12370 static struct sctp_stream_queue_pending *
12371 sctp_copy_it_in(struct sctp_tcb *stcb,
12372 struct sctp_association *asoc,
12373 struct sctp_sndrcvinfo *srcv,
12375 struct sctp_nets *net,
12377 int user_marks_eor,
12382 * This routine must be very careful in its work. Protocol
12383 * processing is up and running so care must be taken to spl...()
12384 * when you need to do something that may effect the stcb/asoc. The
12385 * sb is locked however. When data is copied the protocol processing
12386 * should be enabled since this is a slower operation...
12388 struct sctp_stream_queue_pending *sp = NULL;
12392 /* Now can we send this? */
12393 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12394 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12395 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12396 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12397 /* got data while shutting down */
12398 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12399 *error = ECONNRESET;
12402 sctp_alloc_a_strmoq(stcb, sp);
12404 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12409 sp->sender_all_done = 0;
12410 sp->sinfo_flags = srcv->sinfo_flags;
12411 sp->timetolive = srcv->sinfo_timetolive;
12412 sp->ppid = srcv->sinfo_ppid;
12413 sp->context = srcv->sinfo_context;
12415 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12417 sp->stream = srcv->sinfo_stream;
12418 sp->length = min(uio->uio_resid, max_send_len);
12419 if ((sp->length == (uint32_t) uio->uio_resid) &&
12420 ((user_marks_eor == 0) ||
12421 (srcv->sinfo_flags & SCTP_EOF) ||
12422 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12423 sp->msg_is_complete = 1;
12425 sp->msg_is_complete = 0;
12427 sp->sender_all_done = 0;
12428 sp->some_taken = 0;
12429 sp->put_last_out = 0;
12430 resv_in_first = sizeof(struct sctp_data_chunk);
12431 sp->data = sp->tail_mbuf = NULL;
12432 if (sp->length == 0) {
12436 if (srcv->sinfo_keynumber_valid) {
12437 sp->auth_keyid = srcv->sinfo_keynumber;
12439 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12441 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12442 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12443 sp->holds_key_ref = 1;
12445 *error = sctp_copy_one(sp, uio, resv_in_first);
12448 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12451 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12453 atomic_add_int(&sp->net->ref_count, 1);
12457 sctp_set_prsctp_policy(sp);
12465 sctp_sosend(struct socket *so,
12466 struct sockaddr *addr,
12469 struct mbuf *control,
12474 int error, use_sndinfo = 0;
12475 struct sctp_sndrcvinfo sndrcvninfo;
12476 struct sockaddr *addr_to_use;
12478 #if defined(INET) && defined(INET6)
12479 struct sockaddr_in sin;
12484 /* process cmsg snd/rcv info (maybe a assoc-id) */
12485 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12486 sizeof(sndrcvninfo))) {
12491 addr_to_use = addr;
12492 #if defined(INET) && defined(INET6)
12493 if ((addr) && (addr->sa_family == AF_INET6)) {
12494 struct sockaddr_in6 *sin6;
12496 sin6 = (struct sockaddr_in6 *)addr;
12497 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12498 in6_sin6_2_sin(&sin, sin6);
12499 addr_to_use = (struct sockaddr *)&sin;
12503 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12506 use_sndinfo ? &sndrcvninfo : NULL
12514 sctp_lower_sosend(struct socket *so,
12515 struct sockaddr *addr,
12517 struct mbuf *i_pak,
12518 struct mbuf *control,
12520 struct sctp_sndrcvinfo *srcv
12525 unsigned int sndlen = 0, max_len;
12527 struct mbuf *top = NULL;
12528 int queue_only = 0, queue_only_for_init = 0;
12529 int free_cnt_applied = 0;
12531 int now_filled = 0;
12532 unsigned int inqueue_bytes = 0;
12533 struct sctp_block_entry be;
12534 struct sctp_inpcb *inp;
12535 struct sctp_tcb *stcb = NULL;
12536 struct timeval now;
12537 struct sctp_nets *net;
12538 struct sctp_association *asoc;
12539 struct sctp_inpcb *t_inp;
12540 int user_marks_eor;
12541 int create_lock_applied = 0;
12542 int nagle_applies = 0;
12543 int some_on_control = 0;
12544 int got_all_of_the_send = 0;
12545 int hold_tcblock = 0;
12546 int non_blocking = 0;
12547 uint32_t local_add_more, local_soresv = 0;
12549 uint16_t sinfo_flags;
12550 sctp_assoc_t sinfo_assoc_id;
12557 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12559 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12562 SCTP_RELEASE_PKT(i_pak);
12566 if ((uio == NULL) && (i_pak == NULL)) {
12567 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12570 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12571 atomic_add_int(&inp->total_sends, 1);
12573 if (uio->uio_resid < 0) {
12574 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12577 sndlen = uio->uio_resid;
12579 top = SCTP_HEADER_TO_CHAIN(i_pak);
12580 sndlen = SCTP_HEADER_LEN(i_pak);
12582 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12585 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12586 (inp->sctp_socket->so_qlimit)) {
12587 /* The listener can NOT send */
12588 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12593 * Pre-screen address, if one is given the sin-len
12594 * must be set correctly!
12597 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12599 switch (raddr->sa.sa_family) {
12602 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12603 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12607 port = raddr->sin.sin_port;
12612 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12613 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12617 port = raddr->sin6.sin6_port;
12621 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12622 error = EAFNOSUPPORT;
12629 sinfo_flags = srcv->sinfo_flags;
12630 sinfo_assoc_id = srcv->sinfo_assoc_id;
12631 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12632 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12633 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12637 if (srcv->sinfo_flags)
12638 SCTP_STAT_INCR(sctps_sends_with_flags);
12640 sinfo_flags = inp->def_send.sinfo_flags;
12641 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12643 if (sinfo_flags & SCTP_SENDALL) {
12644 /* its a sendall */
12645 error = sctp_sendall(inp, uio, top, srcv);
12649 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12650 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12654 /* now we must find the assoc */
12655 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12656 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12657 SCTP_INP_RLOCK(inp);
12658 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12660 SCTP_TCB_LOCK(stcb);
12663 SCTP_INP_RUNLOCK(inp);
12664 } else if (sinfo_assoc_id) {
12665 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12668 * Since we did not use findep we must
12669 * increment it, and if we don't find a tcb
12672 SCTP_INP_WLOCK(inp);
12673 SCTP_INP_INCR_REF(inp);
12674 SCTP_INP_WUNLOCK(inp);
12675 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12676 if (stcb == NULL) {
12677 SCTP_INP_WLOCK(inp);
12678 SCTP_INP_DECR_REF(inp);
12679 SCTP_INP_WUNLOCK(inp);
12684 if ((stcb == NULL) && (addr)) {
12685 /* Possible implicit send? */
12686 SCTP_ASOC_CREATE_LOCK(inp);
12687 create_lock_applied = 1;
12688 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12689 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12690 /* Should I really unlock ? */
12691 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12696 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12697 (addr->sa_family == AF_INET6)) {
12698 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12702 SCTP_INP_WLOCK(inp);
12703 SCTP_INP_INCR_REF(inp);
12704 SCTP_INP_WUNLOCK(inp);
12705 /* With the lock applied look again */
12706 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12707 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12708 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12710 if (stcb == NULL) {
12711 SCTP_INP_WLOCK(inp);
12712 SCTP_INP_DECR_REF(inp);
12713 SCTP_INP_WUNLOCK(inp);
12720 if (t_inp != inp) {
12721 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12726 if (stcb == NULL) {
12727 if (addr == NULL) {
12728 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12732 /* We must go ahead and start the INIT process */
12735 if ((sinfo_flags & SCTP_ABORT) ||
12736 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12738 * User asks to abort a non-existant assoc,
12739 * or EOF a non-existant assoc with no data
12741 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12745 /* get an asoc/stcb struct */
12746 vrf_id = inp->def_vrf_id;
12748 if (create_lock_applied == 0) {
12749 panic("Error, should hold create lock and I don't?");
12752 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12755 if (stcb == NULL) {
12756 /* Error is setup for us in the call */
12759 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12760 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12762 * Set the connected flag so we can queue
12765 soisconnecting(so);
12768 if (create_lock_applied) {
12769 SCTP_ASOC_CREATE_UNLOCK(inp);
12770 create_lock_applied = 0;
12772 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12775 * Turn on queue only flag to prevent data from
12779 asoc = &stcb->asoc;
12780 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12781 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12783 /* initialize authentication params for the assoc */
12784 sctp_initialize_auth_params(inp, stcb);
12787 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12788 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7);
12794 /* out with the INIT */
12795 queue_only_for_init = 1;
12797 * we may want to dig in after this call and adjust the MTU
12798 * value. It defaulted to 1500 (constant) but the ro
12799 * structure may now have an update and thus we may need to
12800 * change it BEFORE we append the message.
12804 asoc = &stcb->asoc;
12806 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12807 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12809 net = sctp_findnet(stcb, addr);
12812 if ((net == NULL) ||
12813 ((port != 0) && (port != stcb->rport))) {
12814 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12819 if (stcb->asoc.alternate) {
12820 net = stcb->asoc.alternate;
12822 net = stcb->asoc.primary_destination;
12825 atomic_add_int(&stcb->total_sends, 1);
12826 /* Keep the stcb from being freed under our feet */
12827 atomic_add_int(&asoc->refcnt, 1);
12828 free_cnt_applied = 1;
12830 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12831 if (sndlen > asoc->smallest_mtu) {
12832 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12837 if ((SCTP_SO_IS_NBIO(so)
12838 || (flags & MSG_NBIO)
12842 /* would we block? */
12843 if (non_blocking) {
12844 if (hold_tcblock == 0) {
12845 SCTP_TCB_LOCK(stcb);
12848 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12849 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12850 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12851 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12852 if (sndlen > SCTP_SB_LIMIT_SND(so))
12855 error = EWOULDBLOCK;
12858 stcb->asoc.sb_send_resv += sndlen;
12859 SCTP_TCB_UNLOCK(stcb);
12862 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12864 local_soresv = sndlen;
12865 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12866 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12867 error = ECONNRESET;
12870 if (create_lock_applied) {
12871 SCTP_ASOC_CREATE_UNLOCK(inp);
12872 create_lock_applied = 0;
12874 if (asoc->stream_reset_outstanding) {
12876 * Can't queue any data while stream reset is underway.
12878 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
12882 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12883 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12886 /* we are now done with all control */
12888 sctp_m_freem(control);
12891 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12892 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12893 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12894 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12895 if (srcv->sinfo_flags & SCTP_ABORT) {
12898 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12899 error = ECONNRESET;
12903 /* Ok, we will attempt a msgsnd :> */
12905 p->td_ru.ru_msgsnd++;
12907 /* Are we aborting? */
12908 if (srcv->sinfo_flags & SCTP_ABORT) {
12910 int tot_demand, tot_out = 0, max_out;
12912 SCTP_STAT_INCR(sctps_sends_with_abort);
12913 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12914 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12915 /* It has to be up before we abort */
12916 /* how big is the user initiated abort? */
12917 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12921 if (hold_tcblock) {
12922 SCTP_TCB_UNLOCK(stcb);
12926 struct mbuf *cntm = NULL;
12928 mm = sctp_get_mbuf_for_msg(1, 0, M_WAIT, 1, MT_DATA);
12932 tot_out += SCTP_BUF_LEN(cntm);
12933 cntm = SCTP_BUF_NEXT(cntm);
12936 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12938 /* Must fit in a MTU */
12940 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12941 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12943 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12947 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAIT, 1, MT_DATA);
12950 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12954 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12955 max_out -= sizeof(struct sctp_abort_msg);
12956 if (tot_out > max_out) {
12960 struct sctp_paramhdr *ph;
12962 /* now move forward the data pointer */
12963 ph = mtod(mm, struct sctp_paramhdr *);
12964 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12965 ph->param_length = htons((sizeof(struct sctp_paramhdr) + tot_out));
12967 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12969 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12972 * Here if we can't get his data we
12973 * still abort we just don't get to
12974 * send the users note :-0
12981 SCTP_BUF_NEXT(mm) = top;
12985 if (hold_tcblock == 0) {
12986 SCTP_TCB_LOCK(stcb);
12989 atomic_add_int(&stcb->asoc.refcnt, -1);
12990 free_cnt_applied = 0;
12991 /* release this lock, otherwise we hang on ourselves */
12992 sctp_abort_an_association(stcb->sctp_ep, stcb,
12993 SCTP_RESPONSE_TO_USER_REQ,
12994 mm, SCTP_SO_LOCKED);
12995 /* now relock the stcb so everything is sane */
12999 * In this case top is already chained to mm avoid double
13000 * free, since we free it below if top != NULL and driver
13001 * would free it after sending the packet out
13008 /* Calculate the maximum we can send */
13009 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13010 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13011 if (non_blocking) {
13012 /* we already checked for non-blocking above. */
13015 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13020 if (hold_tcblock) {
13021 SCTP_TCB_UNLOCK(stcb);
13024 /* Is the stream no. valid? */
13025 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
13026 /* Invalid stream number */
13027 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13031 if (asoc->strmout == NULL) {
13032 /* huh? software error */
13033 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13037 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13038 if ((user_marks_eor == 0) &&
13039 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13040 /* It will NEVER fit */
13041 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13045 if ((uio == NULL) && user_marks_eor) {
13047 * We do not support eeor mode for
13048 * sending with mbuf chains (like sendfile).
13050 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13054 if (user_marks_eor) {
13055 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13058 * For non-eeor the whole message must fit in
13059 * the socket send buffer.
13061 local_add_more = sndlen;
13064 if (non_blocking) {
13065 goto skip_preblock;
13067 if (((max_len <= local_add_more) &&
13068 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13070 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13071 /* No room right now ! */
13072 SOCKBUF_LOCK(&so->so_snd);
13073 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13074 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13075 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13076 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
13077 (unsigned int)SCTP_SB_LIMIT_SND(so),
13080 stcb->asoc.stream_queue_cnt,
13081 stcb->asoc.chunks_on_out_queue,
13082 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13083 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13084 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, so, asoc, sndlen);
13087 stcb->block_entry = &be;
13088 error = sbwait(&so->so_snd);
13089 stcb->block_entry = NULL;
13090 if (error || so->so_error || be.error) {
13093 error = so->so_error;
13098 SOCKBUF_UNLOCK(&so->so_snd);
13101 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13102 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13103 so, asoc, stcb->asoc.total_output_queue_size);
13105 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13108 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13110 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13111 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13115 SOCKBUF_UNLOCK(&so->so_snd);
13118 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13122 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13123 * case NOTE: uio will be null when top/mbuf is passed
13126 if (srcv->sinfo_flags & SCTP_EOF) {
13127 got_all_of_the_send = 1;
13130 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13136 struct sctp_stream_queue_pending *sp;
13137 struct sctp_stream_out *strm;
13140 SCTP_TCB_SEND_LOCK(stcb);
13141 if ((asoc->stream_locked) &&
13142 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13143 SCTP_TCB_SEND_UNLOCK(stcb);
13144 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13148 SCTP_TCB_SEND_UNLOCK(stcb);
13150 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13151 if (strm->last_msg_incomplete == 0) {
13153 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error, non_blocking);
13154 if ((sp == NULL) || (error)) {
13157 SCTP_TCB_SEND_LOCK(stcb);
13158 if (sp->msg_is_complete) {
13159 strm->last_msg_incomplete = 0;
13160 asoc->stream_locked = 0;
13163 * Just got locked to this guy in case of an
13166 strm->last_msg_incomplete = 1;
13167 asoc->stream_locked = 1;
13168 asoc->stream_locked_on = srcv->sinfo_stream;
13169 sp->sender_all_done = 0;
13171 sctp_snd_sb_alloc(stcb, sp->length);
13172 atomic_add_int(&asoc->stream_queue_cnt, 1);
13173 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
13174 sp->strseq = strm->next_sequence_sent;
13175 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_SCTP) {
13176 sctp_misc_ints(SCTP_STRMOUT_LOG_ASSIGN,
13177 (uintptr_t) stcb, sp->length,
13178 (uint32_t) ((srcv->sinfo_stream << 16) | sp->strseq), 0);
13180 strm->next_sequence_sent++;
13182 SCTP_STAT_INCR(sctps_sends_with_unord);
13184 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13185 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13186 SCTP_TCB_SEND_UNLOCK(stcb);
13188 SCTP_TCB_SEND_LOCK(stcb);
13189 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13190 SCTP_TCB_SEND_UNLOCK(stcb);
13192 /* ???? Huh ??? last msg is gone */
13194 panic("Warning: Last msg marked incomplete, yet nothing left?");
13196 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13197 strm->last_msg_incomplete = 0;
13203 while (uio->uio_resid > 0) {
13204 /* How much room do we have? */
13205 struct mbuf *new_tail, *mm;
13207 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13208 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
13212 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13213 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13214 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13217 if (hold_tcblock) {
13218 SCTP_TCB_UNLOCK(stcb);
13221 mm = sctp_copy_resume(sp, uio, srcv, max_len, user_marks_eor, &error, &sndout, &new_tail);
13222 if ((mm == NULL) || error) {
13228 /* Update the mbuf and count */
13229 SCTP_TCB_SEND_LOCK(stcb);
13230 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13232 * we need to get out. Peer probably
13236 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13237 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13238 error = ECONNRESET;
13240 SCTP_TCB_SEND_UNLOCK(stcb);
13243 if (sp->tail_mbuf) {
13244 /* tack it to the end */
13245 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13246 sp->tail_mbuf = new_tail;
13248 /* A stolen mbuf */
13250 sp->tail_mbuf = new_tail;
13252 sctp_snd_sb_alloc(stcb, sndout);
13253 atomic_add_int(&sp->length, sndout);
13256 /* Did we reach EOR? */
13257 if ((uio->uio_resid == 0) &&
13258 ((user_marks_eor == 0) ||
13259 (srcv->sinfo_flags & SCTP_EOF) ||
13260 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13261 sp->msg_is_complete = 1;
13263 sp->msg_is_complete = 0;
13265 SCTP_TCB_SEND_UNLOCK(stcb);
13267 if (uio->uio_resid == 0) {
13272 if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
13274 * This is ugly but we must assure locking
13277 if (hold_tcblock == 0) {
13278 SCTP_TCB_LOCK(stcb);
13281 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13282 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13283 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13284 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13290 SCTP_TCB_UNLOCK(stcb);
13293 /* wait for space now */
13294 if (non_blocking) {
13295 /* Non-blocking io in place out */
13298 /* What about the INIT, send it maybe */
13299 if (queue_only_for_init) {
13300 if (hold_tcblock == 0) {
13301 SCTP_TCB_LOCK(stcb);
13304 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13305 /* a collision took us forward? */
13308 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13309 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13313 if ((net->flight_size > net->cwnd) &&
13314 (asoc->sctp_cmt_on_off == 0)) {
13315 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13317 } else if (asoc->ifp_had_enobuf) {
13318 SCTP_STAT_INCR(sctps_ifnomemqueued);
13319 if (net->flight_size > (2 * net->mtu)) {
13322 asoc->ifp_had_enobuf = 0;
13324 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13325 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13326 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13327 (stcb->asoc.total_flight > 0) &&
13328 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13329 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13332 * Ok, Nagle is set on and we have data outstanding.
13333 * Don't send anything and let SACKs drive out the
13334 * data unless wen have a "full" segment to send.
13336 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13337 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13339 SCTP_STAT_INCR(sctps_naglequeued);
13342 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13343 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13344 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13346 SCTP_STAT_INCR(sctps_naglesent);
13349 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13351 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13352 nagle_applies, un_sent);
13353 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13354 stcb->asoc.total_flight,
13355 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13357 if (queue_only_for_init)
13358 queue_only_for_init = 0;
13359 if ((queue_only == 0) && (nagle_applies == 0)) {
13361 * need to start chunk output
13362 * before blocking.. note that if
13363 * a lock is already applied, then
13364 * the input via the net is happening
13365 * and I don't need to start output :-D
13367 if (hold_tcblock == 0) {
13368 if (SCTP_TCB_TRYLOCK(stcb)) {
13370 sctp_chunk_output(inp,
13372 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13375 sctp_chunk_output(inp,
13377 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13379 if (hold_tcblock == 1) {
13380 SCTP_TCB_UNLOCK(stcb);
13384 SOCKBUF_LOCK(&so->so_snd);
13386 * This is a bit strange, but I think it will
13387 * work. The total_output_queue_size is locked and
13388 * protected by the TCB_LOCK, which we just released.
13389 * There is a race that can occur between releasing it
13390 * above, and me getting the socket lock, where sacks
13391 * come in but we have not put the SB_WAIT on the
13392 * so_snd buffer to get the wakeup. After the LOCK
13393 * is applied the sack_processing will also need to
13394 * LOCK the so->so_snd to do the actual sowwakeup(). So
13395 * once we have the socket buffer lock if we recheck the
13396 * size we KNOW we will get to sleep safely with the
13397 * wakeup flag in place.
13399 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13400 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13401 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13402 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13403 so, asoc, uio->uio_resid);
13406 stcb->block_entry = &be;
13407 error = sbwait(&so->so_snd);
13408 stcb->block_entry = NULL;
13410 if (error || so->so_error || be.error) {
13413 error = so->so_error;
13418 SOCKBUF_UNLOCK(&so->so_snd);
13421 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13422 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13423 so, asoc, stcb->asoc.total_output_queue_size);
13426 SOCKBUF_UNLOCK(&so->so_snd);
13427 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13431 SCTP_TCB_SEND_LOCK(stcb);
13433 if (sp->msg_is_complete == 0) {
13434 strm->last_msg_incomplete = 1;
13435 asoc->stream_locked = 1;
13436 asoc->stream_locked_on = srcv->sinfo_stream;
13438 sp->sender_all_done = 1;
13439 strm->last_msg_incomplete = 0;
13440 asoc->stream_locked = 0;
13443 SCTP_PRINTF("Huh no sp TSNH?\n");
13444 strm->last_msg_incomplete = 0;
13445 asoc->stream_locked = 0;
13447 SCTP_TCB_SEND_UNLOCK(stcb);
13448 if (uio->uio_resid == 0) {
13449 got_all_of_the_send = 1;
13452 /* We send in a 0, since we do NOT have any locks */
13453 error = sctp_msg_append(stcb, net, top, srcv, 0);
13455 if (srcv->sinfo_flags & SCTP_EOF) {
13457 * This should only happen for Panda for the mbuf
13458 * send case, which does NOT yet support EEOR mode.
13459 * Thus, we can just set this flag to do the proper
13462 got_all_of_the_send = 1;
13470 if ((srcv->sinfo_flags & SCTP_EOF) &&
13471 (got_all_of_the_send == 1) &&
13472 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) {
13475 SCTP_STAT_INCR(sctps_sends_with_eof);
13477 if (hold_tcblock == 0) {
13478 SCTP_TCB_LOCK(stcb);
13481 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13482 if (TAILQ_EMPTY(&asoc->send_queue) &&
13483 TAILQ_EMPTY(&asoc->sent_queue) &&
13485 if (asoc->locked_on_sending) {
13488 /* there is nothing queued to send, so I'm done... */
13489 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13490 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13491 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13492 struct sctp_nets *netp;
13494 if (stcb->asoc.alternate) {
13495 netp = stcb->asoc.alternate;
13497 netp = stcb->asoc.primary_destination;
13499 /* only send SHUTDOWN the first time through */
13500 sctp_send_shutdown(stcb, netp);
13501 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13502 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13504 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13505 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13506 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13508 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13509 asoc->primary_destination);
13513 * we still got (or just got) data to send, so set
13517 * XXX sockets draft says that SCTP_EOF should be
13518 * sent with no data. currently, we will allow user
13519 * data to be sent first and move to
13522 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13523 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13524 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13525 if (hold_tcblock == 0) {
13526 SCTP_TCB_LOCK(stcb);
13529 if (asoc->locked_on_sending) {
13530 /* Locked to send out the data */
13531 struct sctp_stream_queue_pending *sp;
13533 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13535 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13536 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13539 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13540 if (TAILQ_EMPTY(&asoc->send_queue) &&
13541 TAILQ_EMPTY(&asoc->sent_queue) &&
13542 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13544 if (free_cnt_applied) {
13545 atomic_add_int(&stcb->asoc.refcnt, -1);
13546 free_cnt_applied = 0;
13548 sctp_abort_an_association(stcb->sctp_ep, stcb,
13549 SCTP_RESPONSE_TO_USER_REQ,
13550 NULL, SCTP_SO_LOCKED);
13552 * now relock the stcb so everything
13559 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13560 asoc->primary_destination);
13561 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13566 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13567 some_on_control = 1;
13569 if (queue_only_for_init) {
13570 if (hold_tcblock == 0) {
13571 SCTP_TCB_LOCK(stcb);
13574 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13575 /* a collision took us forward? */
13578 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13579 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13583 if ((net->flight_size > net->cwnd) &&
13584 (stcb->asoc.sctp_cmt_on_off == 0)) {
13585 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13587 } else if (asoc->ifp_had_enobuf) {
13588 SCTP_STAT_INCR(sctps_ifnomemqueued);
13589 if (net->flight_size > (2 * net->mtu)) {
13592 asoc->ifp_had_enobuf = 0;
13594 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13595 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13596 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13597 (stcb->asoc.total_flight > 0) &&
13598 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13599 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13601 * Ok, Nagle is set on and we have data outstanding.
13602 * Don't send anything and let SACKs drive out the
13603 * data unless wen have a "full" segment to send.
13605 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13606 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13608 SCTP_STAT_INCR(sctps_naglequeued);
13611 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13612 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13613 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13615 SCTP_STAT_INCR(sctps_naglesent);
13618 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13619 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13620 nagle_applies, un_sent);
13621 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13622 stcb->asoc.total_flight,
13623 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13625 if (queue_only_for_init)
13626 queue_only_for_init = 0;
13627 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13628 /* we can attempt to send too. */
13629 if (hold_tcblock == 0) {
13631 * If there is activity recv'ing sacks no need to
13634 if (SCTP_TCB_TRYLOCK(stcb)) {
13635 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13639 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13641 } else if ((queue_only == 0) &&
13642 (stcb->asoc.peers_rwnd == 0) &&
13643 (stcb->asoc.total_flight == 0)) {
13644 /* We get to have a probe outstanding */
13645 if (hold_tcblock == 0) {
13647 SCTP_TCB_LOCK(stcb);
13649 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13650 } else if (some_on_control) {
13651 int num_out, reason, frag_point;
13653 /* Here we do control only */
13654 if (hold_tcblock == 0) {
13656 SCTP_TCB_LOCK(stcb);
13658 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13659 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13660 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13662 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13663 queue_only, stcb->asoc.peers_rwnd, un_sent,
13664 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13665 stcb->asoc.total_output_queue_size, error);
13670 if (local_soresv && stcb) {
13671 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13674 if (create_lock_applied) {
13675 SCTP_ASOC_CREATE_UNLOCK(inp);
13676 create_lock_applied = 0;
13678 if ((stcb) && hold_tcblock) {
13679 SCTP_TCB_UNLOCK(stcb);
13681 if (stcb && free_cnt_applied) {
13682 atomic_add_int(&stcb->asoc.refcnt, -1);
13686 if (mtx_owned(&stcb->tcb_mtx)) {
13687 panic("Leaving with tcb mtx owned?");
13689 if (mtx_owned(&stcb->tcb_send_mtx)) {
13690 panic("Leaving with tcb send mtx owned?");
13696 sctp_validate_no_locks(inp);
13698 printf("Warning - inp is NULL so cant validate locks\n");
13705 sctp_m_freem(control);
13712 * generate an AUTHentication chunk, if required
13715 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13716 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13717 struct sctp_tcb *stcb, uint8_t chunk)
13719 struct mbuf *m_auth;
13720 struct sctp_auth_chunk *auth;
13723 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13727 /* sysctl disabled auth? */
13728 if (SCTP_BASE_SYSCTL(sctp_auth_disable))
13731 /* peer doesn't do auth... */
13732 if (!stcb->asoc.peer_supports_auth) {
13735 /* does the requested chunk require auth? */
13736 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13739 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_DONTWAIT, 1, MT_HEADER);
13740 if (m_auth == NULL) {
13744 /* reserve some space if this will be the first mbuf */
13746 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13747 /* fill in the AUTH chunk details */
13748 auth = mtod(m_auth, struct sctp_auth_chunk *);
13749 bzero(auth, sizeof(*auth));
13750 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13751 auth->ch.chunk_flags = 0;
13752 chunk_len = sizeof(*auth) +
13753 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13754 auth->ch.chunk_length = htons(chunk_len);
13755 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13756 /* key id and hmac digest will be computed and filled in upon send */
13758 /* save the offset where the auth was inserted into the chain */
13765 *offset += SCTP_BUF_LEN(cn);
13766 cn = SCTP_BUF_NEXT(cn);
13771 /* update length and return pointer to the auth chunk */
13772 SCTP_BUF_LEN(m_auth) = chunk_len;
13773 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13774 if (auth_ret != NULL)
13782 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13784 struct nd_prefix *pfx = NULL;
13785 struct nd_pfxrouter *pfxrtr = NULL;
13786 struct sockaddr_in6 gw6;
13788 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13791 /* get prefix entry of address */
13792 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13793 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13795 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13796 &src6->sin6_addr, &pfx->ndpr_mask))
13799 /* no prefix entry in the prefix list */
13801 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13802 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13805 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13806 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13808 /* search installed gateway from prefix entry */
13809 for (pfxrtr = pfx->ndpr_advrtrs.lh_first; pfxrtr; pfxrtr =
13810 pfxrtr->pfr_next) {
13811 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13812 gw6.sin6_family = AF_INET6;
13813 gw6.sin6_len = sizeof(struct sockaddr_in6);
13814 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13815 sizeof(struct in6_addr));
13816 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13817 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13818 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13819 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13820 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13821 ro->ro_rt->rt_gateway)) {
13822 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13826 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13833 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13836 struct sockaddr_in *sin, *mask;
13837 struct ifaddr *ifa;
13838 struct in_addr srcnetaddr, gwnetaddr;
13840 if (ro == NULL || ro->ro_rt == NULL ||
13841 sifa->address.sa.sa_family != AF_INET) {
13844 ifa = (struct ifaddr *)sifa->ifa;
13845 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13846 sin = (struct sockaddr_in *)&sifa->address.sin;
13847 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13848 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13849 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13850 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13852 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13853 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13854 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13855 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13856 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13857 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {