2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <netinet/sctp_os.h>
38 #include <netinet/sctp_var.h>
39 #include <netinet/sctp_sysctl.h>
40 #include <netinet/sctp_header.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctputil.h>
43 #include <netinet/sctp_output.h>
44 #include <netinet/sctp_uio.h>
45 #include <netinet/sctputil.h>
46 #include <netinet/sctp_auth.h>
47 #include <netinet/sctp_timer.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_indata.h>
50 #include <netinet/sctp_bsd_addr.h>
51 #include <netinet/sctp_input.h>
52 #include <netinet/sctp_crc32.h>
53 #include <netinet/udp.h>
54 #include <netinet/udp_var.h>
55 #include <machine/in_cksum.h>
59 #define SCTP_MAX_GAPS_INARRAY 4
61 uint8_t right_edge; /* mergable on the right edge */
62 uint8_t left_edge; /* mergable on the left edge */
65 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
68 struct sack_track sack_array[256] = {
69 {0, 0, 0, 0, /* 0x00 */
76 {1, 0, 1, 0, /* 0x01 */
83 {0, 0, 1, 0, /* 0x02 */
90 {1, 0, 1, 0, /* 0x03 */
97 {0, 0, 1, 0, /* 0x04 */
104 {1, 0, 2, 0, /* 0x05 */
111 {0, 0, 1, 0, /* 0x06 */
118 {1, 0, 1, 0, /* 0x07 */
125 {0, 0, 1, 0, /* 0x08 */
132 {1, 0, 2, 0, /* 0x09 */
139 {0, 0, 2, 0, /* 0x0a */
146 {1, 0, 2, 0, /* 0x0b */
153 {0, 0, 1, 0, /* 0x0c */
160 {1, 0, 2, 0, /* 0x0d */
167 {0, 0, 1, 0, /* 0x0e */
174 {1, 0, 1, 0, /* 0x0f */
181 {0, 0, 1, 0, /* 0x10 */
188 {1, 0, 2, 0, /* 0x11 */
195 {0, 0, 2, 0, /* 0x12 */
202 {1, 0, 2, 0, /* 0x13 */
209 {0, 0, 2, 0, /* 0x14 */
216 {1, 0, 3, 0, /* 0x15 */
223 {0, 0, 2, 0, /* 0x16 */
230 {1, 0, 2, 0, /* 0x17 */
237 {0, 0, 1, 0, /* 0x18 */
244 {1, 0, 2, 0, /* 0x19 */
251 {0, 0, 2, 0, /* 0x1a */
258 {1, 0, 2, 0, /* 0x1b */
265 {0, 0, 1, 0, /* 0x1c */
272 {1, 0, 2, 0, /* 0x1d */
279 {0, 0, 1, 0, /* 0x1e */
286 {1, 0, 1, 0, /* 0x1f */
293 {0, 0, 1, 0, /* 0x20 */
300 {1, 0, 2, 0, /* 0x21 */
307 {0, 0, 2, 0, /* 0x22 */
314 {1, 0, 2, 0, /* 0x23 */
321 {0, 0, 2, 0, /* 0x24 */
328 {1, 0, 3, 0, /* 0x25 */
335 {0, 0, 2, 0, /* 0x26 */
342 {1, 0, 2, 0, /* 0x27 */
349 {0, 0, 2, 0, /* 0x28 */
356 {1, 0, 3, 0, /* 0x29 */
363 {0, 0, 3, 0, /* 0x2a */
370 {1, 0, 3, 0, /* 0x2b */
377 {0, 0, 2, 0, /* 0x2c */
384 {1, 0, 3, 0, /* 0x2d */
391 {0, 0, 2, 0, /* 0x2e */
398 {1, 0, 2, 0, /* 0x2f */
405 {0, 0, 1, 0, /* 0x30 */
412 {1, 0, 2, 0, /* 0x31 */
419 {0, 0, 2, 0, /* 0x32 */
426 {1, 0, 2, 0, /* 0x33 */
433 {0, 0, 2, 0, /* 0x34 */
440 {1, 0, 3, 0, /* 0x35 */
447 {0, 0, 2, 0, /* 0x36 */
454 {1, 0, 2, 0, /* 0x37 */
461 {0, 0, 1, 0, /* 0x38 */
468 {1, 0, 2, 0, /* 0x39 */
475 {0, 0, 2, 0, /* 0x3a */
482 {1, 0, 2, 0, /* 0x3b */
489 {0, 0, 1, 0, /* 0x3c */
496 {1, 0, 2, 0, /* 0x3d */
503 {0, 0, 1, 0, /* 0x3e */
510 {1, 0, 1, 0, /* 0x3f */
517 {0, 0, 1, 0, /* 0x40 */
524 {1, 0, 2, 0, /* 0x41 */
531 {0, 0, 2, 0, /* 0x42 */
538 {1, 0, 2, 0, /* 0x43 */
545 {0, 0, 2, 0, /* 0x44 */
552 {1, 0, 3, 0, /* 0x45 */
559 {0, 0, 2, 0, /* 0x46 */
566 {1, 0, 2, 0, /* 0x47 */
573 {0, 0, 2, 0, /* 0x48 */
580 {1, 0, 3, 0, /* 0x49 */
587 {0, 0, 3, 0, /* 0x4a */
594 {1, 0, 3, 0, /* 0x4b */
601 {0, 0, 2, 0, /* 0x4c */
608 {1, 0, 3, 0, /* 0x4d */
615 {0, 0, 2, 0, /* 0x4e */
622 {1, 0, 2, 0, /* 0x4f */
629 {0, 0, 2, 0, /* 0x50 */
636 {1, 0, 3, 0, /* 0x51 */
643 {0, 0, 3, 0, /* 0x52 */
650 {1, 0, 3, 0, /* 0x53 */
657 {0, 0, 3, 0, /* 0x54 */
664 {1, 0, 4, 0, /* 0x55 */
671 {0, 0, 3, 0, /* 0x56 */
678 {1, 0, 3, 0, /* 0x57 */
685 {0, 0, 2, 0, /* 0x58 */
692 {1, 0, 3, 0, /* 0x59 */
699 {0, 0, 3, 0, /* 0x5a */
706 {1, 0, 3, 0, /* 0x5b */
713 {0, 0, 2, 0, /* 0x5c */
720 {1, 0, 3, 0, /* 0x5d */
727 {0, 0, 2, 0, /* 0x5e */
734 {1, 0, 2, 0, /* 0x5f */
741 {0, 0, 1, 0, /* 0x60 */
748 {1, 0, 2, 0, /* 0x61 */
755 {0, 0, 2, 0, /* 0x62 */
762 {1, 0, 2, 0, /* 0x63 */
769 {0, 0, 2, 0, /* 0x64 */
776 {1, 0, 3, 0, /* 0x65 */
783 {0, 0, 2, 0, /* 0x66 */
790 {1, 0, 2, 0, /* 0x67 */
797 {0, 0, 2, 0, /* 0x68 */
804 {1, 0, 3, 0, /* 0x69 */
811 {0, 0, 3, 0, /* 0x6a */
818 {1, 0, 3, 0, /* 0x6b */
825 {0, 0, 2, 0, /* 0x6c */
832 {1, 0, 3, 0, /* 0x6d */
839 {0, 0, 2, 0, /* 0x6e */
846 {1, 0, 2, 0, /* 0x6f */
853 {0, 0, 1, 0, /* 0x70 */
860 {1, 0, 2, 0, /* 0x71 */
867 {0, 0, 2, 0, /* 0x72 */
874 {1, 0, 2, 0, /* 0x73 */
881 {0, 0, 2, 0, /* 0x74 */
888 {1, 0, 3, 0, /* 0x75 */
895 {0, 0, 2, 0, /* 0x76 */
902 {1, 0, 2, 0, /* 0x77 */
909 {0, 0, 1, 0, /* 0x78 */
916 {1, 0, 2, 0, /* 0x79 */
923 {0, 0, 2, 0, /* 0x7a */
930 {1, 0, 2, 0, /* 0x7b */
937 {0, 0, 1, 0, /* 0x7c */
944 {1, 0, 2, 0, /* 0x7d */
951 {0, 0, 1, 0, /* 0x7e */
958 {1, 0, 1, 0, /* 0x7f */
965 {0, 1, 1, 0, /* 0x80 */
972 {1, 1, 2, 0, /* 0x81 */
979 {0, 1, 2, 0, /* 0x82 */
986 {1, 1, 2, 0, /* 0x83 */
993 {0, 1, 2, 0, /* 0x84 */
1000 {1, 1, 3, 0, /* 0x85 */
1007 {0, 1, 2, 0, /* 0x86 */
1014 {1, 1, 2, 0, /* 0x87 */
1021 {0, 1, 2, 0, /* 0x88 */
1028 {1, 1, 3, 0, /* 0x89 */
1035 {0, 1, 3, 0, /* 0x8a */
1042 {1, 1, 3, 0, /* 0x8b */
1049 {0, 1, 2, 0, /* 0x8c */
1056 {1, 1, 3, 0, /* 0x8d */
1063 {0, 1, 2, 0, /* 0x8e */
1070 {1, 1, 2, 0, /* 0x8f */
1077 {0, 1, 2, 0, /* 0x90 */
1084 {1, 1, 3, 0, /* 0x91 */
1091 {0, 1, 3, 0, /* 0x92 */
1098 {1, 1, 3, 0, /* 0x93 */
1105 {0, 1, 3, 0, /* 0x94 */
1112 {1, 1, 4, 0, /* 0x95 */
1119 {0, 1, 3, 0, /* 0x96 */
1126 {1, 1, 3, 0, /* 0x97 */
1133 {0, 1, 2, 0, /* 0x98 */
1140 {1, 1, 3, 0, /* 0x99 */
1147 {0, 1, 3, 0, /* 0x9a */
1154 {1, 1, 3, 0, /* 0x9b */
1161 {0, 1, 2, 0, /* 0x9c */
1168 {1, 1, 3, 0, /* 0x9d */
1175 {0, 1, 2, 0, /* 0x9e */
1182 {1, 1, 2, 0, /* 0x9f */
1189 {0, 1, 2, 0, /* 0xa0 */
1196 {1, 1, 3, 0, /* 0xa1 */
1203 {0, 1, 3, 0, /* 0xa2 */
1210 {1, 1, 3, 0, /* 0xa3 */
1217 {0, 1, 3, 0, /* 0xa4 */
1224 {1, 1, 4, 0, /* 0xa5 */
1231 {0, 1, 3, 0, /* 0xa6 */
1238 {1, 1, 3, 0, /* 0xa7 */
1245 {0, 1, 3, 0, /* 0xa8 */
1252 {1, 1, 4, 0, /* 0xa9 */
1259 {0, 1, 4, 0, /* 0xaa */
1266 {1, 1, 4, 0, /* 0xab */
1273 {0, 1, 3, 0, /* 0xac */
1280 {1, 1, 4, 0, /* 0xad */
1287 {0, 1, 3, 0, /* 0xae */
1294 {1, 1, 3, 0, /* 0xaf */
1301 {0, 1, 2, 0, /* 0xb0 */
1308 {1, 1, 3, 0, /* 0xb1 */
1315 {0, 1, 3, 0, /* 0xb2 */
1322 {1, 1, 3, 0, /* 0xb3 */
1329 {0, 1, 3, 0, /* 0xb4 */
1336 {1, 1, 4, 0, /* 0xb5 */
1343 {0, 1, 3, 0, /* 0xb6 */
1350 {1, 1, 3, 0, /* 0xb7 */
1357 {0, 1, 2, 0, /* 0xb8 */
1364 {1, 1, 3, 0, /* 0xb9 */
1371 {0, 1, 3, 0, /* 0xba */
1378 {1, 1, 3, 0, /* 0xbb */
1385 {0, 1, 2, 0, /* 0xbc */
1392 {1, 1, 3, 0, /* 0xbd */
1399 {0, 1, 2, 0, /* 0xbe */
1406 {1, 1, 2, 0, /* 0xbf */
1413 {0, 1, 1, 0, /* 0xc0 */
1420 {1, 1, 2, 0, /* 0xc1 */
1427 {0, 1, 2, 0, /* 0xc2 */
1434 {1, 1, 2, 0, /* 0xc3 */
1441 {0, 1, 2, 0, /* 0xc4 */
1448 {1, 1, 3, 0, /* 0xc5 */
1455 {0, 1, 2, 0, /* 0xc6 */
1462 {1, 1, 2, 0, /* 0xc7 */
1469 {0, 1, 2, 0, /* 0xc8 */
1476 {1, 1, 3, 0, /* 0xc9 */
1483 {0, 1, 3, 0, /* 0xca */
1490 {1, 1, 3, 0, /* 0xcb */
1497 {0, 1, 2, 0, /* 0xcc */
1504 {1, 1, 3, 0, /* 0xcd */
1511 {0, 1, 2, 0, /* 0xce */
1518 {1, 1, 2, 0, /* 0xcf */
1525 {0, 1, 2, 0, /* 0xd0 */
1532 {1, 1, 3, 0, /* 0xd1 */
1539 {0, 1, 3, 0, /* 0xd2 */
1546 {1, 1, 3, 0, /* 0xd3 */
1553 {0, 1, 3, 0, /* 0xd4 */
1560 {1, 1, 4, 0, /* 0xd5 */
1567 {0, 1, 3, 0, /* 0xd6 */
1574 {1, 1, 3, 0, /* 0xd7 */
1581 {0, 1, 2, 0, /* 0xd8 */
1588 {1, 1, 3, 0, /* 0xd9 */
1595 {0, 1, 3, 0, /* 0xda */
1602 {1, 1, 3, 0, /* 0xdb */
1609 {0, 1, 2, 0, /* 0xdc */
1616 {1, 1, 3, 0, /* 0xdd */
1623 {0, 1, 2, 0, /* 0xde */
1630 {1, 1, 2, 0, /* 0xdf */
1637 {0, 1, 1, 0, /* 0xe0 */
1644 {1, 1, 2, 0, /* 0xe1 */
1651 {0, 1, 2, 0, /* 0xe2 */
1658 {1, 1, 2, 0, /* 0xe3 */
1665 {0, 1, 2, 0, /* 0xe4 */
1672 {1, 1, 3, 0, /* 0xe5 */
1679 {0, 1, 2, 0, /* 0xe6 */
1686 {1, 1, 2, 0, /* 0xe7 */
1693 {0, 1, 2, 0, /* 0xe8 */
1700 {1, 1, 3, 0, /* 0xe9 */
1707 {0, 1, 3, 0, /* 0xea */
1714 {1, 1, 3, 0, /* 0xeb */
1721 {0, 1, 2, 0, /* 0xec */
1728 {1, 1, 3, 0, /* 0xed */
1735 {0, 1, 2, 0, /* 0xee */
1742 {1, 1, 2, 0, /* 0xef */
1749 {0, 1, 1, 0, /* 0xf0 */
1756 {1, 1, 2, 0, /* 0xf1 */
1763 {0, 1, 2, 0, /* 0xf2 */
1770 {1, 1, 2, 0, /* 0xf3 */
1777 {0, 1, 2, 0, /* 0xf4 */
1784 {1, 1, 3, 0, /* 0xf5 */
1791 {0, 1, 2, 0, /* 0xf6 */
1798 {1, 1, 2, 0, /* 0xf7 */
1805 {0, 1, 1, 0, /* 0xf8 */
1812 {1, 1, 2, 0, /* 0xf9 */
1819 {0, 1, 2, 0, /* 0xfa */
1826 {1, 1, 2, 0, /* 0xfb */
1833 {0, 1, 1, 0, /* 0xfc */
1840 {1, 1, 2, 0, /* 0xfd */
1847 {0, 1, 1, 0, /* 0xfe */
1854 {1, 1, 1, 0, /* 0xff */
1865 sctp_is_address_in_scope(struct sctp_ifa *ifa,
1866 struct sctp_scoping *scope,
1869 if ((scope->loopback_scope == 0) &&
1870 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1872 * skip loopback if not in scope *
1876 switch (ifa->address.sa.sa_family) {
1879 if (scope->ipv4_addr_legal) {
1880 struct sockaddr_in *sin;
1882 sin = (struct sockaddr_in *)&ifa->address.sin;
1883 if (sin->sin_addr.s_addr == 0) {
1884 /* not in scope , unspecified */
1887 if ((scope->ipv4_local_scope == 0) &&
1888 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1889 /* private address not in scope */
1899 if (scope->ipv6_addr_legal) {
1900 struct sockaddr_in6 *sin6;
1903 * Must update the flags, bummer, which means any
1904 * IFA locks must now be applied HERE <->
1907 sctp_gather_internal_ifa_flags(ifa);
1909 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1912 /* ok to use deprecated addresses? */
1913 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
1914 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1915 /* skip unspecifed addresses */
1918 if ( /* (local_scope == 0) && */
1919 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1922 if ((scope->site_scope == 0) &&
1923 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1937 static struct mbuf *
1938 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t * len)
1940 #if defined(INET) || defined(INET6)
1941 struct sctp_paramhdr *parmh;
1947 switch (ifa->address.sa.sa_family) {
1950 plen = (uint16_t) sizeof(struct sctp_ipv4addr_param);
1955 plen = (uint16_t) sizeof(struct sctp_ipv6addr_param);
1961 #if defined(INET) || defined(INET6)
1962 if (M_TRAILINGSPACE(m) >= plen) {
1963 /* easy side we just drop it on the end */
1964 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1967 /* Need more space */
1969 while (SCTP_BUF_NEXT(mret) != NULL) {
1970 mret = SCTP_BUF_NEXT(mret);
1972 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_DONTWAIT, 1, MT_DATA);
1973 if (SCTP_BUF_NEXT(mret) == NULL) {
1974 /* We are hosed, can't add more addresses */
1977 mret = SCTP_BUF_NEXT(mret);
1978 parmh = mtod(mret, struct sctp_paramhdr *);
1980 /* now add the parameter */
1981 switch (ifa->address.sa.sa_family) {
1985 struct sctp_ipv4addr_param *ipv4p;
1986 struct sockaddr_in *sin;
1988 sin = (struct sockaddr_in *)&ifa->address.sin;
1989 ipv4p = (struct sctp_ipv4addr_param *)parmh;
1990 parmh->param_type = htons(SCTP_IPV4_ADDRESS);
1991 parmh->param_length = htons(plen);
1992 ipv4p->addr = sin->sin_addr.s_addr;
1993 SCTP_BUF_LEN(mret) += plen;
2000 struct sctp_ipv6addr_param *ipv6p;
2001 struct sockaddr_in6 *sin6;
2003 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2004 ipv6p = (struct sctp_ipv6addr_param *)parmh;
2005 parmh->param_type = htons(SCTP_IPV6_ADDRESS);
2006 parmh->param_length = htons(plen);
2007 memcpy(ipv6p->addr, &sin6->sin6_addr,
2008 sizeof(ipv6p->addr));
2009 /* clear embedded scope in the address */
2010 in6_clearscope((struct in6_addr *)ipv6p->addr);
2011 SCTP_BUF_LEN(mret) += plen;
2027 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2028 struct sctp_scoping *scope,
2029 struct mbuf *m_at, int cnt_inits_to,
2030 uint16_t * padding_len, uint16_t * chunk_len)
2032 struct sctp_vrf *vrf = NULL;
2033 int cnt, limit_out = 0, total_count;
2036 vrf_id = inp->def_vrf_id;
2037 SCTP_IPI_ADDR_RLOCK();
2038 vrf = sctp_find_vrf(vrf_id);
2040 SCTP_IPI_ADDR_RUNLOCK();
2043 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2044 struct sctp_ifa *sctp_ifap;
2045 struct sctp_ifn *sctp_ifnp;
2048 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2050 cnt = SCTP_ADDRESS_LIMIT;
2053 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2054 if ((scope->loopback_scope == 0) &&
2055 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2057 * Skip loopback devices if loopback_scope
2062 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2063 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2066 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
2070 if (cnt > SCTP_ADDRESS_LIMIT) {
2074 if (cnt > SCTP_ADDRESS_LIMIT) {
2081 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2083 if ((scope->loopback_scope == 0) &&
2084 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2086 * Skip loopback devices if
2087 * loopback_scope not set
2091 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2092 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2095 if (sctp_is_address_in_scope(sctp_ifap,
2099 if ((chunk_len != NULL) &&
2100 (padding_len != NULL) &&
2101 (*padding_len > 0)) {
2102 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2103 SCTP_BUF_LEN(m_at) += *padding_len;
2104 *chunk_len += *padding_len;
2107 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
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,
2155 * To get through a NAT we only list addresses if we have
2156 * more than one. That way if you just bind a single address
2157 * we let the source of the init dictate our address.
2161 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2162 if (laddr->ifa == NULL) {
2165 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2168 if (sctp_is_address_in_scope(laddr->ifa,
2172 if ((chunk_len != NULL) &&
2173 (padding_len != NULL) &&
2174 (*padding_len > 0)) {
2175 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2176 SCTP_BUF_LEN(m_at) += *padding_len;
2177 *chunk_len += *padding_len;
2180 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
2182 if (cnt >= SCTP_ADDRESS_LIMIT) {
2188 SCTP_IPI_ADDR_RUNLOCK();
2192 static struct sctp_ifa *
2193 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2194 uint8_t dest_is_loop,
2195 uint8_t dest_is_priv,
2198 uint8_t dest_is_global = 0;
2200 /* dest_is_priv is true if destination is a private address */
2201 /* dest_is_loop is true if destination is a loopback addresses */
2204 * Here we determine if its a preferred address. A preferred address
2205 * means it is the same scope or higher scope then the destination.
2206 * L = loopback, P = private, G = global
2207 * -----------------------------------------
2208 * src | dest | result
2209 * ----------------------------------------
2211 * -----------------------------------------
2212 * P | L | yes-v4 no-v6
2213 * -----------------------------------------
2214 * G | L | yes-v4 no-v6
2215 * -----------------------------------------
2217 * -----------------------------------------
2219 * -----------------------------------------
2221 * -----------------------------------------
2223 * -----------------------------------------
2225 * -----------------------------------------
2227 * -----------------------------------------
2230 if (ifa->address.sa.sa_family != fam) {
2231 /* forget mis-matched family */
2234 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2237 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2238 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2239 /* Ok the address may be ok */
2241 if (fam == AF_INET6) {
2242 /* ok to use deprecated addresses? no lets not! */
2243 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2244 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2247 if (ifa->src_is_priv && !ifa->src_is_loop) {
2249 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2253 if (ifa->src_is_glob) {
2255 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2262 * Now that we know what is what, implement or table this could in
2263 * theory be done slicker (it used to be), but this is
2264 * straightforward and easier to validate :-)
2266 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2267 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2268 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2269 dest_is_loop, dest_is_priv, dest_is_global);
2271 if ((ifa->src_is_loop) && (dest_is_priv)) {
2272 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2275 if ((ifa->src_is_glob) && (dest_is_priv)) {
2276 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2279 if ((ifa->src_is_loop) && (dest_is_global)) {
2280 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2283 if ((ifa->src_is_priv) && (dest_is_global)) {
2284 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2287 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2288 /* its a preferred address */
2292 static struct sctp_ifa *
2293 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2294 uint8_t dest_is_loop,
2295 uint8_t dest_is_priv,
2298 uint8_t dest_is_global = 0;
2301 * Here we determine if its a acceptable address. A acceptable
2302 * address means it is the same scope or higher scope but we can
2303 * allow for NAT which means its ok to have a global dest and a
2306 * L = loopback, P = private, G = global
2307 * -----------------------------------------
2308 * src | dest | result
2309 * -----------------------------------------
2311 * -----------------------------------------
2312 * P | L | yes-v4 no-v6
2313 * -----------------------------------------
2315 * -----------------------------------------
2317 * -----------------------------------------
2319 * -----------------------------------------
2320 * G | P | yes - May not work
2321 * -----------------------------------------
2323 * -----------------------------------------
2324 * P | G | yes - May not work
2325 * -----------------------------------------
2327 * -----------------------------------------
2330 if (ifa->address.sa.sa_family != fam) {
2331 /* forget non matching family */
2332 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2333 ifa->address.sa.sa_family, fam);
2336 /* Ok the address may be ok */
2337 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2338 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2339 dest_is_loop, dest_is_priv);
2340 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2344 if (fam == AF_INET6) {
2345 /* ok to use deprecated addresses? */
2346 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2349 if (ifa->src_is_priv) {
2350 /* Special case, linklocal to loop */
2357 * Now that we know what is what, implement our table. This could in
2358 * theory be done slicker (it used to be), but this is
2359 * straightforward and easier to validate :-)
2361 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2364 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2367 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2370 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2373 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2374 /* its an acceptable address */
2379 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2381 struct sctp_laddr *laddr;
2384 /* There are no restrictions, no TCB :-) */
2387 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2388 if (laddr->ifa == NULL) {
2389 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2393 if (laddr->ifa == ifa) {
2394 /* Yes it is on the list */
2403 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2405 struct sctp_laddr *laddr;
2409 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2410 if (laddr->ifa == NULL) {
2411 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2415 if ((laddr->ifa == ifa) && laddr->action == 0)
2424 static struct sctp_ifa *
2425 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2428 int non_asoc_addr_ok,
2429 uint8_t dest_is_priv,
2430 uint8_t dest_is_loop,
2433 struct sctp_laddr *laddr, *starting_point;
2436 struct sctp_ifn *sctp_ifn;
2437 struct sctp_ifa *sctp_ifa, *sifa;
2438 struct sctp_vrf *vrf;
2441 vrf = sctp_find_vrf(vrf_id);
2445 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2446 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2447 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2449 * first question, is the ifn we will emit on in our list, if so, we
2450 * want such an address. Note that we first looked for a preferred
2454 /* is a preferred one on the interface we route out? */
2455 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2456 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2457 (non_asoc_addr_ok == 0))
2459 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2464 if (sctp_is_addr_in_ep(inp, sifa)) {
2465 atomic_add_int(&sifa->refcount, 1);
2471 * ok, now we now need to find one on the list of the addresses. We
2472 * can't get one on the emitting interface so let's find first a
2473 * preferred one. If not that an acceptable one otherwise... we
2476 starting_point = inp->next_addr_touse;
2478 if (inp->next_addr_touse == NULL) {
2479 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2482 for (laddr = inp->next_addr_touse; laddr;
2483 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2484 if (laddr->ifa == NULL) {
2485 /* address has been removed */
2488 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2489 /* address is being deleted */
2492 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2496 atomic_add_int(&sifa->refcount, 1);
2499 if (resettotop == 0) {
2500 inp->next_addr_touse = NULL;
2503 inp->next_addr_touse = starting_point;
2506 if (inp->next_addr_touse == NULL) {
2507 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2510 /* ok, what about an acceptable address in the inp */
2511 for (laddr = inp->next_addr_touse; laddr;
2512 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2513 if (laddr->ifa == NULL) {
2514 /* address has been removed */
2517 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2518 /* address is being deleted */
2521 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2525 atomic_add_int(&sifa->refcount, 1);
2528 if (resettotop == 0) {
2529 inp->next_addr_touse = NULL;
2530 goto once_again_too;
2533 * no address bound can be a source for the destination we are in
2541 static struct sctp_ifa *
2542 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2543 struct sctp_tcb *stcb,
2546 uint8_t dest_is_priv,
2547 uint8_t dest_is_loop,
2548 int non_asoc_addr_ok,
2551 struct sctp_laddr *laddr, *starting_point;
2553 struct sctp_ifn *sctp_ifn;
2554 struct sctp_ifa *sctp_ifa, *sifa;
2555 uint8_t start_at_beginning = 0;
2556 struct sctp_vrf *vrf;
2560 * first question, is the ifn we will emit on in our list, if so, we
2563 vrf = sctp_find_vrf(vrf_id);
2567 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2568 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2569 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2572 * first question, is the ifn we will emit on in our list? If so,
2573 * we want that one. First we look for a preferred. Second, we go
2574 * for an acceptable.
2577 /* first try for a preferred address on the ep */
2578 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2579 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2581 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2582 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2585 if (((non_asoc_addr_ok == 0) &&
2586 (sctp_is_addr_restricted(stcb, sifa))) ||
2587 (non_asoc_addr_ok &&
2588 (sctp_is_addr_restricted(stcb, sifa)) &&
2589 (!sctp_is_addr_pending(stcb, sifa)))) {
2590 /* on the no-no list */
2593 atomic_add_int(&sifa->refcount, 1);
2597 /* next try for an acceptable address on the ep */
2598 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2599 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2601 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2602 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2605 if (((non_asoc_addr_ok == 0) &&
2606 (sctp_is_addr_restricted(stcb, sifa))) ||
2607 (non_asoc_addr_ok &&
2608 (sctp_is_addr_restricted(stcb, sifa)) &&
2609 (!sctp_is_addr_pending(stcb, sifa)))) {
2610 /* on the no-no list */
2613 atomic_add_int(&sifa->refcount, 1);
2620 * if we can't find one like that then we must look at all addresses
2621 * bound to pick one at first preferable then secondly acceptable.
2623 starting_point = stcb->asoc.last_used_address;
2625 if (stcb->asoc.last_used_address == NULL) {
2626 start_at_beginning = 1;
2627 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2629 /* search beginning with the last used address */
2630 for (laddr = stcb->asoc.last_used_address; laddr;
2631 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2632 if (laddr->ifa == NULL) {
2633 /* address has been removed */
2636 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2637 /* address is being deleted */
2640 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2643 if (((non_asoc_addr_ok == 0) &&
2644 (sctp_is_addr_restricted(stcb, sifa))) ||
2645 (non_asoc_addr_ok &&
2646 (sctp_is_addr_restricted(stcb, sifa)) &&
2647 (!sctp_is_addr_pending(stcb, sifa)))) {
2648 /* on the no-no list */
2651 stcb->asoc.last_used_address = laddr;
2652 atomic_add_int(&sifa->refcount, 1);
2655 if (start_at_beginning == 0) {
2656 stcb->asoc.last_used_address = NULL;
2657 goto sctp_from_the_top;
2659 /* now try for any higher scope than the destination */
2660 stcb->asoc.last_used_address = starting_point;
2661 start_at_beginning = 0;
2663 if (stcb->asoc.last_used_address == NULL) {
2664 start_at_beginning = 1;
2665 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2667 /* search beginning with the last used address */
2668 for (laddr = stcb->asoc.last_used_address; laddr;
2669 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2670 if (laddr->ifa == NULL) {
2671 /* address has been removed */
2674 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2675 /* address is being deleted */
2678 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2682 if (((non_asoc_addr_ok == 0) &&
2683 (sctp_is_addr_restricted(stcb, sifa))) ||
2684 (non_asoc_addr_ok &&
2685 (sctp_is_addr_restricted(stcb, sifa)) &&
2686 (!sctp_is_addr_pending(stcb, sifa)))) {
2687 /* on the no-no list */
2690 stcb->asoc.last_used_address = laddr;
2691 atomic_add_int(&sifa->refcount, 1);
2694 if (start_at_beginning == 0) {
2695 stcb->asoc.last_used_address = NULL;
2696 goto sctp_from_the_top2;
2701 static struct sctp_ifa *
2702 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2703 struct sctp_tcb *stcb,
2704 int non_asoc_addr_ok,
2705 uint8_t dest_is_loop,
2706 uint8_t dest_is_priv,
2712 struct sctp_ifa *ifa, *sifa;
2713 int num_eligible_addr = 0;
2716 struct sockaddr_in6 sin6, lsa6;
2718 if (fam == AF_INET6) {
2719 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2720 (void)sa6_recoverscope(&sin6);
2723 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2724 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2725 (non_asoc_addr_ok == 0))
2727 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2732 if (fam == AF_INET6 &&
2734 sifa->src_is_loop && sifa->src_is_priv) {
2736 * don't allow fe80::1 to be a src on loop ::1, we
2737 * don't list it to the peer so we will get an
2742 if (fam == AF_INET6 &&
2743 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2744 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2746 * link-local <-> link-local must belong to the same
2749 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2750 (void)sa6_recoverscope(&lsa6);
2751 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2758 * Check if the IPv6 address matches to next-hop. In the
2759 * mobile case, old IPv6 address may be not deleted from the
2760 * interface. Then, the interface has previous and new
2761 * addresses. We should use one corresponding to the
2762 * next-hop. (by micchie)
2765 if (stcb && fam == AF_INET6 &&
2766 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2767 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2774 /* Avoid topologically incorrect IPv4 address */
2775 if (stcb && fam == AF_INET &&
2776 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2777 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2783 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2786 if (((non_asoc_addr_ok == 0) &&
2787 (sctp_is_addr_restricted(stcb, sifa))) ||
2788 (non_asoc_addr_ok &&
2789 (sctp_is_addr_restricted(stcb, sifa)) &&
2790 (!sctp_is_addr_pending(stcb, sifa)))) {
2792 * It is restricted for some reason..
2793 * probably not yet added.
2798 if (num_eligible_addr >= addr_wanted) {
2801 num_eligible_addr++;
2808 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2809 struct sctp_tcb *stcb,
2810 int non_asoc_addr_ok,
2811 uint8_t dest_is_loop,
2812 uint8_t dest_is_priv,
2815 struct sctp_ifa *ifa, *sifa;
2816 int num_eligible_addr = 0;
2818 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2819 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2820 (non_asoc_addr_ok == 0)) {
2823 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2829 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2832 if (((non_asoc_addr_ok == 0) &&
2833 (sctp_is_addr_restricted(stcb, sifa))) ||
2834 (non_asoc_addr_ok &&
2835 (sctp_is_addr_restricted(stcb, sifa)) &&
2836 (!sctp_is_addr_pending(stcb, sifa)))) {
2838 * It is restricted for some reason..
2839 * probably not yet added.
2844 num_eligible_addr++;
2846 return (num_eligible_addr);
2849 static struct sctp_ifa *
2850 sctp_choose_boundall(struct sctp_tcb *stcb,
2851 struct sctp_nets *net,
2854 uint8_t dest_is_priv,
2855 uint8_t dest_is_loop,
2856 int non_asoc_addr_ok,
2859 int cur_addr_num = 0, num_preferred = 0;
2861 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2862 struct sctp_ifa *sctp_ifa, *sifa;
2864 struct sctp_vrf *vrf;
2872 * For boundall we can use any address in the association.
2873 * If non_asoc_addr_ok is set we can use any address (at least in
2874 * theory). So we look for preferred addresses first. If we find one,
2875 * we use it. Otherwise we next try to get an address on the
2876 * interface, which we should be able to do (unless non_asoc_addr_ok
2877 * is false and we are routed out that way). In these cases where we
2878 * can't use the address of the interface we go through all the
2879 * ifn's looking for an address we can use and fill that in. Punting
2880 * means we send back address 0, which will probably cause problems
2881 * actually since then IP will fill in the address of the route ifn,
2882 * which means we probably already rejected it.. i.e. here comes an
2885 vrf = sctp_find_vrf(vrf_id);
2889 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2890 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2891 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2892 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2893 if (sctp_ifn == NULL) {
2894 /* ?? We don't have this guy ?? */
2895 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
2896 goto bound_all_plan_b;
2898 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
2899 ifn_index, sctp_ifn->ifn_name);
2902 cur_addr_num = net->indx_of_eligible_next_to_use;
2904 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
2909 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
2910 num_preferred, sctp_ifn->ifn_name);
2911 if (num_preferred == 0) {
2913 * no eligible addresses, we must use some other interface
2914 * address if we can find one.
2916 goto bound_all_plan_b;
2919 * Ok we have num_eligible_addr set with how many we can use, this
2920 * may vary from call to call due to addresses being deprecated
2923 if (cur_addr_num >= num_preferred) {
2927 * select the nth address from the list (where cur_addr_num is the
2928 * nth) and 0 is the first one, 1 is the second one etc...
2930 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
2932 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
2933 dest_is_priv, cur_addr_num, fam, ro);
2935 /* if sctp_ifa is NULL something changed??, fall to plan b. */
2937 atomic_add_int(&sctp_ifa->refcount, 1);
2939 /* save off where the next one we will want */
2940 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
2945 * plan_b: Look at all interfaces and find a preferred address. If
2946 * no preferred fall through to plan_c.
2949 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
2950 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2951 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
2952 sctp_ifn->ifn_name);
2953 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2954 /* wrong base scope */
2955 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
2958 if ((sctp_ifn == looked_at) && looked_at) {
2959 /* already looked at this guy */
2960 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
2963 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, stcb, non_asoc_addr_ok,
2964 dest_is_loop, dest_is_priv, fam);
2965 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2966 "Found ifn:%p %d preferred source addresses\n",
2967 ifn, num_preferred);
2968 if (num_preferred == 0) {
2969 /* None on this interface. */
2970 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n");
2973 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2974 "num preferred:%d on interface:%p cur_addr_num:%d\n",
2975 num_preferred, (void *)sctp_ifn, cur_addr_num);
2978 * Ok we have num_eligible_addr set with how many we can
2979 * use, this may vary from call to call due to addresses
2980 * being deprecated etc..
2982 if (cur_addr_num >= num_preferred) {
2985 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
2986 dest_is_priv, cur_addr_num, fam, ro);
2990 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
2991 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
2993 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
2994 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
2995 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
2996 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
2998 atomic_add_int(&sifa->refcount, 1);
3002 again_with_private_addresses_allowed:
3004 /* plan_c: do we have an acceptable address on the emit interface */
3006 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3007 if (emit_ifn == NULL) {
3008 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3011 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3012 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3013 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3014 (non_asoc_addr_ok == 0)) {
3015 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3018 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3021 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3025 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3026 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3030 if (((non_asoc_addr_ok == 0) &&
3031 (sctp_is_addr_restricted(stcb, sifa))) ||
3032 (non_asoc_addr_ok &&
3033 (sctp_is_addr_restricted(stcb, sifa)) &&
3034 (!sctp_is_addr_pending(stcb, sifa)))) {
3036 * It is restricted for some reason..
3037 * probably not yet added.
3039 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n");
3044 SCTP_PRINTF("Stcb is null - no print\n");
3046 atomic_add_int(&sifa->refcount, 1);
3051 * plan_d: We are in trouble. No preferred address on the emit
3052 * interface. And not even a preferred address on all interfaces. Go
3053 * out and see if we can find an acceptable address somewhere
3054 * amongst all interfaces.
3056 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3057 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3058 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3059 /* wrong base scope */
3062 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3063 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3064 (non_asoc_addr_ok == 0))
3066 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3072 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3076 if (((non_asoc_addr_ok == 0) &&
3077 (sctp_is_addr_restricted(stcb, sifa))) ||
3078 (non_asoc_addr_ok &&
3079 (sctp_is_addr_restricted(stcb, sifa)) &&
3080 (!sctp_is_addr_pending(stcb, sifa)))) {
3082 * It is restricted for some
3083 * reason.. probably not yet added.
3093 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3094 stcb->asoc.scope.ipv4_local_scope = 1;
3096 goto again_with_private_addresses_allowed;
3097 } else if (retried == 1) {
3098 stcb->asoc.scope.ipv4_local_scope = 0;
3105 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3106 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3107 /* wrong base scope */
3110 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3111 struct sctp_ifa *tmp_sifa;
3113 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3114 (non_asoc_addr_ok == 0))
3116 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3119 if (tmp_sifa == NULL) {
3122 if (tmp_sifa == sifa) {
3126 if (sctp_is_address_in_scope(tmp_sifa,
3127 &stcb->asoc.scope, 0) == 0) {
3130 if (((non_asoc_addr_ok == 0) &&
3131 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3132 (non_asoc_addr_ok &&
3133 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3134 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3144 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3145 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3146 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3151 atomic_add_int(&sifa->refcount, 1);
3159 /* tcb may be NULL */
3161 sctp_source_address_selection(struct sctp_inpcb *inp,
3162 struct sctp_tcb *stcb,
3164 struct sctp_nets *net,
3165 int non_asoc_addr_ok, uint32_t vrf_id)
3167 struct sctp_ifa *answer;
3168 uint8_t dest_is_priv, dest_is_loop;
3172 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3176 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3181 * Rules: - Find the route if needed, cache if I can. - Look at
3182 * interface address in route, Is it in the bound list. If so we
3183 * have the best source. - If not we must rotate amongst the
3188 * Do we need to pay attention to scope. We can have a private address
3189 * or a global address we are sourcing or sending to. So if we draw
3191 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3193 * ------------------------------------------
3194 * source * dest * result
3195 * -----------------------------------------
3196 * <a> Private * Global * NAT
3197 * -----------------------------------------
3198 * <b> Private * Private * No problem
3199 * -----------------------------------------
3200 * <c> Global * Private * Huh, How will this work?
3201 * -----------------------------------------
3202 * <d> Global * Global * No Problem
3203 *------------------------------------------
3204 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3206 *------------------------------------------
3207 * source * dest * result
3208 * -----------------------------------------
3209 * <a> Linklocal * Global *
3210 * -----------------------------------------
3211 * <b> Linklocal * Linklocal * No problem
3212 * -----------------------------------------
3213 * <c> Global * Linklocal * Huh, How will this work?
3214 * -----------------------------------------
3215 * <d> Global * Global * No Problem
3216 *------------------------------------------
3217 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3219 * And then we add to that what happens if there are multiple addresses
3220 * assigned to an interface. Remember the ifa on a ifn is a linked
3221 * list of addresses. So one interface can have more than one IP
3222 * address. What happens if we have both a private and a global
3223 * address? Do we then use context of destination to sort out which
3224 * one is best? And what about NAT's sending P->G may get you a NAT
3225 * translation, or should you select the G thats on the interface in
3230 * - count the number of addresses on the interface.
3231 * - if it is one, no problem except case <c>.
3232 * For <a> we will assume a NAT out there.
3233 * - if there are more than one, then we need to worry about scope P
3234 * or G. We should prefer G -> G and P -> P if possible.
3235 * Then as a secondary fall back to mixed types G->P being a last
3237 * - The above all works for bound all, but bound specific we need to
3238 * use the same concept but instead only consider the bound
3239 * addresses. If the bound set is NOT assigned to the interface then
3240 * we must use rotation amongst the bound addresses..
3242 if (ro->ro_rt == NULL) {
3244 * Need a route to cache.
3246 SCTP_RTALLOC(ro, vrf_id);
3248 if (ro->ro_rt == NULL) {
3251 fam = ro->ro_dst.sa_family;
3252 dest_is_priv = dest_is_loop = 0;
3253 /* Setup our scopes for the destination */
3257 /* Scope based on outbound address */
3258 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3261 /* mark it as local */
3262 net->addr_is_local = 1;
3264 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3271 /* Scope based on outbound address */
3272 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3273 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3275 * If the address is a loopback address, which
3276 * consists of "::1" OR "fe80::1%lo0", we are
3277 * loopback scope. But we don't use dest_is_priv
3278 * (link local addresses).
3282 /* mark it as local */
3283 net->addr_is_local = 1;
3285 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3291 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3292 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3293 SCTP_IPI_ADDR_RLOCK();
3294 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3298 answer = sctp_choose_boundall(stcb, net, ro, vrf_id,
3299 dest_is_priv, dest_is_loop,
3300 non_asoc_addr_ok, fam);
3301 SCTP_IPI_ADDR_RUNLOCK();
3308 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3309 vrf_id, dest_is_priv,
3311 non_asoc_addr_ok, fam);
3313 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3318 SCTP_IPI_ADDR_RUNLOCK();
3323 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3326 int tlen, at, found;
3327 struct sctp_sndinfo sndinfo;
3328 struct sctp_prinfo prinfo;
3329 struct sctp_authinfo authinfo;
3331 tlen = SCTP_BUF_LEN(control);
3335 * Independent of how many mbufs, find the c_type inside the control
3336 * structure and copy out the data.
3339 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3340 /* There is not enough room for one more. */
3343 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3344 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3345 /* We dont't have a complete CMSG header. */
3348 if (((int)cmh.cmsg_len + at) > tlen) {
3349 /* We don't have the complete CMSG. */
3352 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3353 ((c_type == cmh.cmsg_type) ||
3354 ((c_type == SCTP_SNDRCV) &&
3355 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3356 (cmh.cmsg_type == SCTP_PRINFO) ||
3357 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3358 if (c_type == cmh.cmsg_type) {
3359 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
3362 /* It is exactly what we want. Copy it out. */
3363 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), cpsize, (caddr_t)data);
3366 struct sctp_sndrcvinfo *sndrcvinfo;
3368 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3370 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3373 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3375 switch (cmh.cmsg_type) {
3377 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
3380 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3381 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3382 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3383 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3384 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3385 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3388 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
3391 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3392 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3393 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3396 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
3399 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3400 sndrcvinfo->sinfo_keynumber_valid = 1;
3401 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3409 at += CMSG_ALIGN(cmh.cmsg_len);
3415 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3419 struct sctp_initmsg initmsg;
3422 struct sockaddr_in sin;
3426 struct sockaddr_in6 sin6;
3430 tlen = SCTP_BUF_LEN(control);
3433 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3434 /* There is not enough room for one more. */
3438 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3439 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3440 /* We dont't have a complete CMSG header. */
3444 if (((int)cmh.cmsg_len + at) > tlen) {
3445 /* We don't have the complete CMSG. */
3449 if (cmh.cmsg_level == IPPROTO_SCTP) {
3450 switch (cmh.cmsg_type) {
3452 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
3456 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3457 if (initmsg.sinit_max_attempts)
3458 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3459 if (initmsg.sinit_num_ostreams)
3460 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3461 if (initmsg.sinit_max_instreams)
3462 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3463 if (initmsg.sinit_max_init_timeo)
3464 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3465 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3466 struct sctp_stream_out *tmp_str;
3469 /* Default is NOT correct */
3470 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3471 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3472 SCTP_TCB_UNLOCK(stcb);
3473 SCTP_MALLOC(tmp_str,
3474 struct sctp_stream_out *,
3475 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3477 SCTP_TCB_LOCK(stcb);
3478 if (tmp_str != NULL) {
3479 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3480 stcb->asoc.strmout = tmp_str;
3481 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3483 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3485 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3486 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3487 stcb->asoc.strmout[i].chunks_on_queues = 0;
3488 stcb->asoc.strmout[i].next_sequence_send = 0;
3489 stcb->asoc.strmout[i].stream_no = i;
3490 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3491 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3496 case SCTP_DSTADDRV4:
3497 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3501 memset(&sin, 0, sizeof(struct sockaddr_in));
3502 sin.sin_family = AF_INET;
3503 sin.sin_len = sizeof(struct sockaddr_in);
3504 sin.sin_port = stcb->rport;
3505 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3506 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3507 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3508 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3512 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3513 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3520 case SCTP_DSTADDRV6:
3521 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3525 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3526 sin6.sin6_family = AF_INET6;
3527 sin6.sin6_len = sizeof(struct sockaddr_in6);
3528 sin6.sin6_port = stcb->rport;
3529 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3530 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3531 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3536 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3537 in6_sin6_2_sin(&sin, &sin6);
3538 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3539 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3540 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3544 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3545 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3551 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
3552 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3562 at += CMSG_ALIGN(cmh.cmsg_len);
3567 static struct sctp_tcb *
3568 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3570 struct mbuf *control,
3571 struct sctp_nets **net_p,
3576 struct sctp_tcb *stcb;
3577 struct sockaddr *addr;
3580 struct sockaddr_in sin;
3584 struct sockaddr_in6 sin6;
3588 tlen = SCTP_BUF_LEN(control);
3591 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3592 /* There is not enough room for one more. */
3596 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3597 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3598 /* We dont't have a complete CMSG header. */
3602 if (((int)cmh.cmsg_len + at) > tlen) {
3603 /* We don't have the complete CMSG. */
3607 if (cmh.cmsg_level == IPPROTO_SCTP) {
3608 switch (cmh.cmsg_type) {
3610 case SCTP_DSTADDRV4:
3611 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3615 memset(&sin, 0, sizeof(struct sockaddr_in));
3616 sin.sin_family = AF_INET;
3617 sin.sin_len = sizeof(struct sockaddr_in);
3618 sin.sin_port = port;
3619 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3620 addr = (struct sockaddr *)&sin;
3624 case SCTP_DSTADDRV6:
3625 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3629 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3630 sin6.sin6_family = AF_INET6;
3631 sin6.sin6_len = sizeof(struct sockaddr_in6);
3632 sin6.sin6_port = port;
3633 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3635 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3636 in6_sin6_2_sin(&sin, &sin6);
3637 addr = (struct sockaddr *)&sin;
3640 addr = (struct sockaddr *)&sin6;
3648 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3654 at += CMSG_ALIGN(cmh.cmsg_len);
3659 static struct mbuf *
3660 sctp_add_cookie(struct mbuf *init, int init_offset,
3661 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3663 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3664 struct sctp_state_cookie *stc;
3665 struct sctp_paramhdr *ph;
3671 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3672 sizeof(struct sctp_paramhdr)), 0,
3673 M_DONTWAIT, 1, MT_DATA);
3677 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_DONTWAIT);
3678 if (copy_init == NULL) {
3682 #ifdef SCTP_MBUF_LOGGING
3683 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3686 for (mat = copy_init; mat; mat = SCTP_BUF_NEXT(mat)) {
3687 if (SCTP_BUF_IS_EXTENDED(mat)) {
3688 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3693 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3695 if (copy_initack == NULL) {
3697 sctp_m_freem(copy_init);
3700 #ifdef SCTP_MBUF_LOGGING
3701 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3704 for (mat = copy_initack; mat; mat = SCTP_BUF_NEXT(mat)) {
3705 if (SCTP_BUF_IS_EXTENDED(mat)) {
3706 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3711 /* easy side we just drop it on the end */
3712 ph = mtod(mret, struct sctp_paramhdr *);
3713 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3714 sizeof(struct sctp_paramhdr);
3715 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3716 sizeof(struct sctp_paramhdr));
3717 ph->param_type = htons(SCTP_STATE_COOKIE);
3718 ph->param_length = 0; /* fill in at the end */
3719 /* Fill in the stc cookie data */
3720 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3722 /* tack the INIT and then the INIT-ACK onto the chain */
3724 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3725 cookie_sz += SCTP_BUF_LEN(m_at);
3726 if (SCTP_BUF_NEXT(m_at) == NULL) {
3727 SCTP_BUF_NEXT(m_at) = copy_init;
3731 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3732 cookie_sz += SCTP_BUF_LEN(m_at);
3733 if (SCTP_BUF_NEXT(m_at) == NULL) {
3734 SCTP_BUF_NEXT(m_at) = copy_initack;
3738 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3739 cookie_sz += SCTP_BUF_LEN(m_at);
3740 if (SCTP_BUF_NEXT(m_at) == NULL) {
3744 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_DONTWAIT, 1, MT_DATA);
3746 /* no space, so free the entire chain */
3750 SCTP_BUF_LEN(sig) = 0;
3751 SCTP_BUF_NEXT(m_at) = sig;
3753 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3754 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3756 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3757 cookie_sz += SCTP_SIGNATURE_SIZE;
3758 ph->param_length = htons(cookie_sz);
3764 sctp_get_ect(struct sctp_tcb *stcb)
3766 if ((stcb != NULL) && (stcb->asoc.ecn_allowed == 1)) {
3767 return (SCTP_ECT0_BIT);
3773 #if defined(INET) || defined(INET6)
3775 sctp_handle_no_route(struct sctp_tcb *stcb,
3776 struct sctp_nets *net,
3779 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3782 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3783 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3784 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3785 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3786 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3787 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3791 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3792 net->dest_state &= ~SCTP_ADDR_PF;
3796 if (net == stcb->asoc.primary_destination) {
3797 /* need a new primary */
3798 struct sctp_nets *alt;
3800 alt = sctp_find_alternate_net(stcb, net, 0);
3802 if (stcb->asoc.alternate) {
3803 sctp_free_remote_addr(stcb->asoc.alternate);
3805 stcb->asoc.alternate = alt;
3806 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3807 if (net->ro._s_addr) {
3808 sctp_free_ifa(net->ro._s_addr);
3809 net->ro._s_addr = NULL;
3811 net->src_addr_selected = 0;
3821 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3822 struct sctp_tcb *stcb, /* may be NULL */
3823 struct sctp_nets *net,
3824 struct sockaddr *to,
3826 uint32_t auth_offset,
3827 struct sctp_auth_chunk *auth,
3828 uint16_t auth_keyid,
3829 int nofragment_flag,
3836 union sctp_sockstore *over_addr,
3837 uint8_t use_mflowid, uint32_t mflowid,
3838 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3839 int so_locked SCTP_UNUSED
3844 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3847 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3848 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3849 * - fill in the HMAC digest of any AUTH chunk in the packet.
3850 * - calculate and fill in the SCTP checksum.
3851 * - prepend an IP address header.
3852 * - if boundall use INADDR_ANY.
3853 * - if boundspecific do source address selection.
3854 * - set fragmentation option for ipV4.
3855 * - On return from IP output, check/adjust mtu size of output
3856 * interface and smallest_mtu size as well.
3858 /* Will need ifdefs around this */
3860 struct sctphdr *sctphdr;
3864 #if defined(INET) || defined(INET6)
3868 #if defined(INET) || defined(INET6)
3870 sctp_route_t *ro = NULL;
3871 struct udphdr *udp = NULL;
3876 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3877 struct socket *so = NULL;
3881 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
3882 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
3886 #if defined(INET) || defined(INET6)
3888 vrf_id = stcb->asoc.vrf_id;
3890 vrf_id = inp->def_vrf_id;
3893 /* fill in the HMAC digest for any AUTH chunk in the packet */
3894 if ((auth != NULL) && (stcb != NULL)) {
3895 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
3898 tos_value = net->dscp;
3900 tos_value = stcb->asoc.default_dscp;
3902 tos_value = inp->sctp_ep.default_dscp;
3905 switch (to->sa_family) {
3909 struct ip *ip = NULL;
3910 sctp_route_t iproute;
3913 len = sizeof(struct ip) + sizeof(struct sctphdr);
3915 len += sizeof(struct udphdr);
3917 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
3920 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
3923 SCTP_ALIGN_TO_END(newm, len);
3924 SCTP_BUF_LEN(newm) = len;
3925 SCTP_BUF_NEXT(newm) = m;
3929 if (net->flowidset == 0) {
3930 panic("Flow ID not set");
3933 m->m_pkthdr.flowid = net->flowid;
3934 m->m_flags |= M_FLOWID;
3936 if (use_mflowid != 0) {
3937 m->m_pkthdr.flowid = mflowid;
3938 m->m_flags |= M_FLOWID;
3941 packet_length = sctp_calculate_len(m);
3942 ip = mtod(m, struct ip *);
3943 ip->ip_v = IPVERSION;
3944 ip->ip_hl = (sizeof(struct ip) >> 2);
3945 if (tos_value == 0) {
3947 * This means especially, that it is not set
3948 * at the SCTP layer. So use the value from
3951 tos_value = inp->ip_inp.inp.inp_ip_tos;
3955 tos_value |= sctp_get_ect(stcb);
3957 if ((nofragment_flag) && (port == 0)) {
3962 /* FreeBSD has a function for ip_id's */
3963 ip->ip_id = ip_newid();
3965 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
3966 ip->ip_len = packet_length;
3967 ip->ip_tos = tos_value;
3969 ip->ip_p = IPPROTO_UDP;
3971 ip->ip_p = IPPROTO_SCTP;
3976 memset(&iproute, 0, sizeof(iproute));
3977 memcpy(&ro->ro_dst, to, to->sa_len);
3979 ro = (sctp_route_t *) & net->ro;
3981 /* Now the address selection part */
3982 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
3984 /* call the routine to select the src address */
3985 if (net && out_of_asoc_ok == 0) {
3986 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
3987 sctp_free_ifa(net->ro._s_addr);
3988 net->ro._s_addr = NULL;
3989 net->src_addr_selected = 0;
3995 if (net->src_addr_selected == 0) {
3996 /* Cache the source address */
3997 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4000 net->src_addr_selected = 1;
4002 if (net->ro._s_addr == NULL) {
4003 /* No route to host */
4004 net->src_addr_selected = 0;
4005 sctp_handle_no_route(stcb, net, so_locked);
4006 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4008 return (EHOSTUNREACH);
4010 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4012 if (over_addr == NULL) {
4013 struct sctp_ifa *_lsrc;
4015 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4019 if (_lsrc == NULL) {
4020 sctp_handle_no_route(stcb, net, so_locked);
4021 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4023 return (EHOSTUNREACH);
4025 ip->ip_src = _lsrc->address.sin.sin_addr;
4026 sctp_free_ifa(_lsrc);
4028 ip->ip_src = over_addr->sin.sin_addr;
4029 SCTP_RTALLOC(ro, vrf_id);
4033 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4034 sctp_handle_no_route(stcb, net, so_locked);
4035 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4037 return (EHOSTUNREACH);
4039 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4040 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4041 udp->uh_dport = port;
4042 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4044 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4048 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4050 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4053 sctphdr->src_port = src_port;
4054 sctphdr->dest_port = dest_port;
4055 sctphdr->v_tag = v_tag;
4056 sctphdr->checksum = 0;
4059 * If source address selection fails and we find no
4060 * route then the ip_output should fail as well with
4061 * a NO_ROUTE_TO_HOST type error. We probably should
4062 * catch that somewhere and abort the association
4063 * right away (assuming this is an INIT being sent).
4065 if (ro->ro_rt == NULL) {
4067 * src addr selection failed to find a route
4068 * (or valid source addr), so we can't get
4069 * there from here (yet)!
4071 sctp_handle_no_route(stcb, net, so_locked);
4072 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4074 return (EHOSTUNREACH);
4076 if (ro != &iproute) {
4077 memcpy(&iproute, ro, sizeof(*ro));
4079 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4080 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4081 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4082 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4083 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4086 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4087 /* failed to prepend data, give up */
4088 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4092 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4094 #if defined(SCTP_WITH_NO_CSUM)
4095 SCTP_STAT_INCR(sctps_sendnocrc);
4097 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4098 SCTP_STAT_INCR(sctps_sendswcrc);
4101 SCTP_ENABLE_UDP_CSUM(o_pak);
4104 #if defined(SCTP_WITH_NO_CSUM)
4105 SCTP_STAT_INCR(sctps_sendnocrc);
4107 m->m_pkthdr.csum_flags = CSUM_SCTP;
4108 m->m_pkthdr.csum_data = 0;
4109 SCTP_STAT_INCR(sctps_sendhwcrc);
4112 #ifdef SCTP_PACKET_LOGGING
4113 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4114 sctp_packet_log(o_pak);
4116 /* send it out. table id is taken from stcb */
4117 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4118 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4119 so = SCTP_INP_SO(inp);
4120 SCTP_SOCKET_UNLOCK(so, 0);
4123 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4124 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4125 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4126 atomic_add_int(&stcb->asoc.refcnt, 1);
4127 SCTP_TCB_UNLOCK(stcb);
4128 SCTP_SOCKET_LOCK(so, 0);
4129 SCTP_TCB_LOCK(stcb);
4130 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4133 SCTP_STAT_INCR(sctps_sendpackets);
4134 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4136 SCTP_STAT_INCR(sctps_senderrors);
4138 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4140 /* free tempy routes */
4144 * PMTU check versus smallest asoc MTU goes
4147 if ((ro->ro_rt != NULL) &&
4148 (net->ro._s_addr)) {
4151 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4153 mtu -= sizeof(struct udphdr);
4155 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4156 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4159 } else if (ro->ro_rt == NULL) {
4160 /* route was freed */
4161 if (net->ro._s_addr &&
4162 net->src_addr_selected) {
4163 sctp_free_ifa(net->ro._s_addr);
4164 net->ro._s_addr = NULL;
4166 net->src_addr_selected = 0;
4175 uint32_t flowlabel, flowinfo;
4176 struct ip6_hdr *ip6h;
4177 struct route_in6 ip6route;
4179 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4181 struct sockaddr_in6 lsa6_storage;
4183 u_short prev_port = 0;
4187 flowlabel = net->flowlabel;
4189 flowlabel = stcb->asoc.default_flowlabel;
4191 flowlabel = inp->sctp_ep.default_flowlabel;
4193 if (flowlabel == 0) {
4195 * This means especially, that it is not set
4196 * at the SCTP layer. So use the value from
4199 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4201 flowlabel &= 0x000fffff;
4202 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
4204 len += sizeof(struct udphdr);
4206 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
4209 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4212 SCTP_ALIGN_TO_END(newm, len);
4213 SCTP_BUF_LEN(newm) = len;
4214 SCTP_BUF_NEXT(newm) = m;
4218 if (net->flowidset == 0) {
4219 panic("Flow ID not set");
4222 m->m_pkthdr.flowid = net->flowid;
4223 m->m_flags |= M_FLOWID;
4225 if (use_mflowid != 0) {
4226 m->m_pkthdr.flowid = mflowid;
4227 m->m_flags |= M_FLOWID;
4230 packet_length = sctp_calculate_len(m);
4232 ip6h = mtod(m, struct ip6_hdr *);
4233 /* protect *sin6 from overwrite */
4234 sin6 = (struct sockaddr_in6 *)to;
4238 /* KAME hack: embed scopeid */
4239 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4240 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4244 memset(&ip6route, 0, sizeof(ip6route));
4245 ro = (sctp_route_t *) & ip6route;
4246 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4248 ro = (sctp_route_t *) & net->ro;
4251 * We assume here that inp_flow is in host byte
4252 * order within the TCB!
4254 if (tos_value == 0) {
4256 * This means especially, that it is not set
4257 * at the SCTP layer. So use the value from
4260 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4264 tos_value |= sctp_get_ect(stcb);
4268 flowinfo |= tos_value;
4270 flowinfo |= flowlabel;
4271 ip6h->ip6_flow = htonl(flowinfo);
4273 ip6h->ip6_nxt = IPPROTO_UDP;
4275 ip6h->ip6_nxt = IPPROTO_SCTP;
4277 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4278 ip6h->ip6_dst = sin6->sin6_addr;
4281 * Add SRC address selection here: we can only reuse
4282 * to a limited degree the kame src-addr-sel, since
4283 * we can try their selection but it may not be
4286 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4287 lsa6_tmp.sin6_family = AF_INET6;
4288 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4290 if (net && out_of_asoc_ok == 0) {
4291 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4292 sctp_free_ifa(net->ro._s_addr);
4293 net->ro._s_addr = NULL;
4294 net->src_addr_selected = 0;
4300 if (net->src_addr_selected == 0) {
4301 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4302 /* KAME hack: embed scopeid */
4303 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4304 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4307 /* Cache the source address */
4308 net->ro._s_addr = sctp_source_address_selection(inp,
4314 (void)sa6_recoverscope(sin6);
4315 net->src_addr_selected = 1;
4317 if (net->ro._s_addr == NULL) {
4318 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4319 net->src_addr_selected = 0;
4320 sctp_handle_no_route(stcb, net, so_locked);
4321 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4323 return (EHOSTUNREACH);
4325 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4327 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4328 /* KAME hack: embed scopeid */
4329 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4330 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4333 if (over_addr == NULL) {
4334 struct sctp_ifa *_lsrc;
4336 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4340 if (_lsrc == NULL) {
4341 sctp_handle_no_route(stcb, net, so_locked);
4342 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4344 return (EHOSTUNREACH);
4346 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4347 sctp_free_ifa(_lsrc);
4349 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4350 SCTP_RTALLOC(ro, vrf_id);
4352 (void)sa6_recoverscope(sin6);
4354 lsa6->sin6_port = inp->sctp_lport;
4356 if (ro->ro_rt == NULL) {
4358 * src addr selection failed to find a route
4359 * (or valid source addr), so we can't get
4362 sctp_handle_no_route(stcb, net, so_locked);
4363 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4365 return (EHOSTUNREACH);
4368 * XXX: sa6 may not have a valid sin6_scope_id in
4369 * the non-SCOPEDROUTING case.
4371 bzero(&lsa6_storage, sizeof(lsa6_storage));
4372 lsa6_storage.sin6_family = AF_INET6;
4373 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4374 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4375 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4376 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4381 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4382 lsa6_storage.sin6_port = inp->sctp_lport;
4383 lsa6 = &lsa6_storage;
4384 ip6h->ip6_src = lsa6->sin6_addr;
4387 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4388 sctp_handle_no_route(stcb, net, so_locked);
4389 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4391 return (EHOSTUNREACH);
4393 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4394 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4395 udp->uh_dport = port;
4396 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4398 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4400 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4403 sctphdr->src_port = src_port;
4404 sctphdr->dest_port = dest_port;
4405 sctphdr->v_tag = v_tag;
4406 sctphdr->checksum = 0;
4409 * We set the hop limit now since there is a good
4410 * chance that our ro pointer is now filled
4412 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4413 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4416 /* Copy to be sure something bad is not happening */
4417 sin6->sin6_addr = ip6h->ip6_dst;
4418 lsa6->sin6_addr = ip6h->ip6_src;
4421 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4422 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4423 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4424 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4425 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4427 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4429 * preserve the port and scope for link
4432 prev_scope = sin6->sin6_scope_id;
4433 prev_port = sin6->sin6_port;
4435 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4436 /* failed to prepend data, give up */
4438 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4441 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4443 #if defined(SCTP_WITH_NO_CSUM)
4444 SCTP_STAT_INCR(sctps_sendnocrc);
4446 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4447 SCTP_STAT_INCR(sctps_sendswcrc);
4449 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4450 udp->uh_sum = 0xffff;
4453 #if defined(SCTP_WITH_NO_CSUM)
4454 SCTP_STAT_INCR(sctps_sendnocrc);
4456 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4457 m->m_pkthdr.csum_data = 0;
4458 SCTP_STAT_INCR(sctps_sendhwcrc);
4461 /* send it out. table id is taken from stcb */
4462 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4463 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4464 so = SCTP_INP_SO(inp);
4465 SCTP_SOCKET_UNLOCK(so, 0);
4468 #ifdef SCTP_PACKET_LOGGING
4469 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4470 sctp_packet_log(o_pak);
4472 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4473 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4474 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4475 atomic_add_int(&stcb->asoc.refcnt, 1);
4476 SCTP_TCB_UNLOCK(stcb);
4477 SCTP_SOCKET_LOCK(so, 0);
4478 SCTP_TCB_LOCK(stcb);
4479 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4483 /* for link local this must be done */
4484 sin6->sin6_scope_id = prev_scope;
4485 sin6->sin6_port = prev_port;
4487 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4488 SCTP_STAT_INCR(sctps_sendpackets);
4489 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4491 SCTP_STAT_INCR(sctps_senderrors);
4494 /* Now if we had a temp route free it */
4498 * PMTU check versus smallest asoc MTU goes
4501 if (ro->ro_rt == NULL) {
4502 /* Route was freed */
4503 if (net->ro._s_addr &&
4504 net->src_addr_selected) {
4505 sctp_free_ifa(net->ro._s_addr);
4506 net->ro._s_addr = NULL;
4508 net->src_addr_selected = 0;
4510 if ((ro->ro_rt != NULL) &&
4511 (net->ro._s_addr)) {
4514 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4516 (stcb->asoc.smallest_mtu > mtu)) {
4517 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4520 net->mtu -= sizeof(struct udphdr);
4524 if (ND_IFINFO(ifp)->linkmtu &&
4525 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4526 sctp_mtu_size_reset(inp,
4528 ND_IFINFO(ifp)->linkmtu);
4536 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4537 ((struct sockaddr *)to)->sa_family);
4539 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4546 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4547 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4553 struct sctp_nets *net;
4554 struct sctp_init_chunk *init;
4555 struct sctp_supported_addr_param *sup_addr;
4556 struct sctp_adaptation_layer_indication *ali;
4557 struct sctp_supported_chunk_types_param *pr_supported;
4558 struct sctp_paramhdr *ph;
4559 int cnt_inits_to = 0;
4561 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4563 /* INIT's always go to the primary (and usually ONLY address) */
4564 net = stcb->asoc.primary_destination;
4566 net = TAILQ_FIRST(&stcb->asoc.nets);
4571 /* we confirm any address we send an INIT to */
4572 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4573 (void)sctp_set_primary_addr(stcb, NULL, net);
4575 /* we confirm any address we send an INIT to */
4576 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4578 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4580 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4582 * special hook, if we are sending to link local it will not
4583 * show up in our private address count.
4585 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4589 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4590 /* This case should not happen */
4591 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4594 /* start the INIT timer */
4595 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4597 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA);
4599 /* No memory, INIT timer will re-attempt. */
4600 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4603 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4606 * assume peer supports asconf in order to be able to queue local
4607 * address changes while an INIT is in flight and before the assoc
4610 stcb->asoc.peer_supports_asconf = 1;
4611 /* Now lets put the chunk header in place */
4612 init = mtod(m, struct sctp_init_chunk *);
4613 /* now the chunk header */
4614 init->ch.chunk_type = SCTP_INITIATION;
4615 init->ch.chunk_flags = 0;
4616 /* fill in later from mbuf we build */
4617 init->ch.chunk_length = 0;
4618 /* place in my tag */
4619 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4620 /* set up some of the credits. */
4621 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4622 SCTP_MINIMAL_RWND));
4623 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4624 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4625 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4627 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4630 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4631 if (stcb->asoc.scope.ipv4_addr_legal) {
4632 parameter_len += (uint16_t) sizeof(uint16_t);
4634 if (stcb->asoc.scope.ipv6_addr_legal) {
4635 parameter_len += (uint16_t) sizeof(uint16_t);
4637 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4638 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4639 sup_addr->ph.param_length = htons(parameter_len);
4641 if (stcb->asoc.scope.ipv4_addr_legal) {
4642 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4644 if (stcb->asoc.scope.ipv6_addr_legal) {
4645 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4647 padding_len = 4 - 2 * i;
4648 chunk_len += parameter_len;
4650 /* Adaptation layer indication parameter */
4651 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4652 if (padding_len > 0) {
4653 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4654 chunk_len += padding_len;
4657 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4658 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4659 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4660 ali->ph.param_length = htons(parameter_len);
4661 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
4662 chunk_len += parameter_len;
4664 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4665 /* Add NAT friendly parameter. */
4666 if (padding_len > 0) {
4667 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4668 chunk_len += padding_len;
4671 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4672 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4673 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4674 ph->param_length = htons(parameter_len);
4675 chunk_len += parameter_len;
4677 /* now any cookie time extensions */
4678 if (stcb->asoc.cookie_preserve_req) {
4679 struct sctp_cookie_perserve_param *cookie_preserve;
4681 if (padding_len > 0) {
4682 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4683 chunk_len += padding_len;
4686 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4687 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4688 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4689 cookie_preserve->ph.param_length = htons(parameter_len);
4690 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4691 stcb->asoc.cookie_preserve_req = 0;
4692 chunk_len += parameter_len;
4695 if (stcb->asoc.ecn_allowed == 1) {
4696 if (padding_len > 0) {
4697 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4698 chunk_len += padding_len;
4701 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4702 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4703 ph->param_type = htons(SCTP_ECN_CAPABLE);
4704 ph->param_length = htons(parameter_len);
4705 chunk_len += parameter_len;
4707 /* And now tell the peer we do support PR-SCTP. */
4708 if (padding_len > 0) {
4709 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4710 chunk_len += padding_len;
4713 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4714 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4715 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4716 ph->param_length = htons(parameter_len);
4717 chunk_len += parameter_len;
4719 /* And now tell the peer we do all the extensions */
4720 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4721 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4723 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4724 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4725 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4726 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4727 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4728 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4729 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4731 if (stcb->asoc.sctp_nr_sack_on_off == 1) {
4732 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4734 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4735 pr_supported->ph.param_length = htons(parameter_len);
4736 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4737 chunk_len += parameter_len;
4739 /* add authentication parameters */
4740 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4741 /* attach RANDOM parameter, if available */
4742 if (stcb->asoc.authinfo.random != NULL) {
4743 struct sctp_auth_random *randp;
4745 if (padding_len > 0) {
4746 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4747 chunk_len += padding_len;
4750 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4751 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4752 /* random key already contains the header */
4753 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4754 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4755 chunk_len += parameter_len;
4757 /* add HMAC_ALGO parameter */
4758 if ((stcb->asoc.local_hmacs != NULL) &&
4759 (stcb->asoc.local_hmacs->num_algo > 0)) {
4760 struct sctp_auth_hmac_algo *hmacs;
4762 if (padding_len > 0) {
4763 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4764 chunk_len += padding_len;
4767 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4768 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4769 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4770 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4771 hmacs->ph.param_length = htons(parameter_len);
4772 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4773 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4774 chunk_len += parameter_len;
4776 /* add CHUNKS parameter */
4777 if (sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks) > 0) {
4778 struct sctp_auth_chunk_list *chunks;
4780 if (padding_len > 0) {
4781 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4782 chunk_len += padding_len;
4785 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4786 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4787 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4788 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4789 chunks->ph.param_length = htons(parameter_len);
4790 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4791 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4792 chunk_len += parameter_len;
4795 SCTP_BUF_LEN(m) = chunk_len;
4797 /* now the addresses */
4799 * To optimize this we could put the scoping stuff into a structure
4800 * and remove the individual uint8's from the assoc structure. Then
4801 * we could just sifa in the address within the stcb. But for now
4802 * this is a quick hack to get the address stuff teased apart.
4804 sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope, m, cnt_inits_to, &padding_len, &chunk_len);
4806 init->ch.chunk_length = htons(chunk_len);
4807 if (padding_len > 0) {
4808 struct mbuf *m_at, *mp_last;
4811 for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
4812 if (SCTP_BUF_NEXT(m_at) == NULL)
4815 if ((mp_last == NULL) || sctp_add_pad_tombuf(mp_last, padding_len)) {
4820 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4821 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4822 (struct sockaddr *)&net->ro._l_addr,
4823 m, 0, NULL, 0, 0, 0, 0,
4824 inp->sctp_lport, stcb->rport, htonl(0),
4828 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4829 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4830 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4834 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4835 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4838 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4839 * being equal to the beginning of the params i.e. (iphlen +
4840 * sizeof(struct sctp_init_msg) parse through the parameters to the
4841 * end of the mbuf verifying that all parameters are known.
4843 * For unknown parameters build and return a mbuf with
4844 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4845 * processing this chunk stop, and set *abort_processing to 1.
4847 * By having param_offset be pre-set to where parameters begin it is
4848 * hoped that this routine may be reused in the future by new
4851 struct sctp_paramhdr *phdr, params;
4853 struct mbuf *mat, *op_err;
4854 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4855 int at, limit, pad_needed;
4856 uint16_t ptype, plen, padded_size;
4859 *abort_processing = 0;
4862 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4865 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4866 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4867 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4868 ptype = ntohs(phdr->param_type);
4869 plen = ntohs(phdr->param_length);
4870 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4871 /* wacked parameter */
4872 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4875 limit -= SCTP_SIZE32(plen);
4877 * All parameters for all chunks that we know/understand are
4878 * listed here. We process them other places and make
4879 * appropriate stop actions per the upper bits. However this
4880 * is the generic routine processor's can call to get back
4881 * an operr.. to either incorporate (init-ack) or send.
4883 padded_size = SCTP_SIZE32(plen);
4885 /* Param's with variable size */
4886 case SCTP_HEARTBEAT_INFO:
4887 case SCTP_STATE_COOKIE:
4888 case SCTP_UNRECOG_PARAM:
4889 case SCTP_ERROR_CAUSE_IND:
4893 /* Param's with variable size within a range */
4894 case SCTP_CHUNK_LIST:
4895 case SCTP_SUPPORTED_CHUNK_EXT:
4896 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
4897 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
4902 case SCTP_SUPPORTED_ADDRTYPE:
4903 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
4904 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
4910 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
4911 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
4916 case SCTP_SET_PRIM_ADDR:
4917 case SCTP_DEL_IP_ADDRESS:
4918 case SCTP_ADD_IP_ADDRESS:
4919 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
4920 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
4921 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
4926 /* Param's with a fixed size */
4927 case SCTP_IPV4_ADDRESS:
4928 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
4929 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
4934 case SCTP_IPV6_ADDRESS:
4935 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
4936 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
4941 case SCTP_COOKIE_PRESERVE:
4942 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
4943 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
4948 case SCTP_HAS_NAT_SUPPORT:
4951 case SCTP_PRSCTP_SUPPORTED:
4953 if (padded_size != sizeof(struct sctp_paramhdr)) {
4954 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
4959 case SCTP_ECN_CAPABLE:
4960 if (padded_size != sizeof(struct sctp_ecn_supported_param)) {
4961 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
4966 case SCTP_ULP_ADAPTATION:
4967 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
4968 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
4973 case SCTP_SUCCESS_REPORT:
4974 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
4975 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
4980 case SCTP_HOSTNAME_ADDRESS:
4982 /* We can NOT handle HOST NAME addresses!! */
4985 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
4986 *abort_processing = 1;
4987 if (op_err == NULL) {
4988 /* Ok need to try to get a mbuf */
4990 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
4992 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
4995 l_len += sizeof(struct sctp_paramhdr);
4996 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
4998 SCTP_BUF_LEN(op_err) = 0;
5000 * pre-reserve space for ip
5001 * and sctp header and
5005 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5007 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5009 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5010 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5014 /* If we have space */
5015 struct sctp_paramhdr s;
5018 uint32_t cpthis = 0;
5020 pad_needed = 4 - (err_at % 4);
5021 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5022 err_at += pad_needed;
5024 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5025 s.param_length = htons(sizeof(s) + plen);
5026 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5027 err_at += sizeof(s);
5028 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5030 sctp_m_freem(op_err);
5032 * we are out of memory but
5033 * we still need to have a
5034 * look at what to do (the
5035 * system is in trouble
5040 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5047 * we do not recognize the parameter figure out what
5050 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5051 if ((ptype & 0x4000) == 0x4000) {
5052 /* Report bit is set?? */
5053 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5054 if (op_err == NULL) {
5057 /* Ok need to try to get an mbuf */
5059 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5061 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5064 l_len += sizeof(struct sctp_paramhdr);
5065 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5067 SCTP_BUF_LEN(op_err) = 0;
5069 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5071 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5073 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5074 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5078 /* If we have space */
5079 struct sctp_paramhdr s;
5082 uint32_t cpthis = 0;
5084 pad_needed = 4 - (err_at % 4);
5085 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5086 err_at += pad_needed;
5088 s.param_type = htons(SCTP_UNRECOG_PARAM);
5089 s.param_length = htons(sizeof(s) + plen);
5090 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5091 err_at += sizeof(s);
5092 if (plen > sizeof(tempbuf)) {
5093 plen = sizeof(tempbuf);
5095 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5097 sctp_m_freem(op_err);
5099 * we are out of memory but
5100 * we still need to have a
5101 * look at what to do (the
5102 * system is in trouble
5106 goto more_processing;
5108 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5113 if ((ptype & 0x8000) == 0x0000) {
5114 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5117 /* skip this chunk and continue processing */
5118 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5119 at += SCTP_SIZE32(plen);
5124 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5128 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5129 *abort_processing = 1;
5130 if ((op_err == NULL) && phdr) {
5134 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5136 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5138 l_len += (2 * sizeof(struct sctp_paramhdr));
5139 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5141 SCTP_BUF_LEN(op_err) = 0;
5143 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5145 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5147 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5148 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5151 if ((op_err) && phdr) {
5152 struct sctp_paramhdr s;
5155 uint32_t cpthis = 0;
5157 pad_needed = 4 - (err_at % 4);
5158 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5159 err_at += pad_needed;
5161 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5162 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5163 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5164 err_at += sizeof(s);
5165 /* Only copy back the p-hdr that caused the issue */
5166 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5172 sctp_are_there_new_addresses(struct sctp_association *asoc,
5173 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5176 * Given a INIT packet, look through the packet to verify that there
5177 * are NO new addresses. As we go through the parameters add reports
5178 * of any un-understood parameters that require an error. Also we
5179 * must return (1) to drop the packet if we see a un-understood
5180 * parameter that tells us to drop the chunk.
5182 struct sockaddr *sa_touse;
5183 struct sockaddr *sa;
5184 struct sctp_paramhdr *phdr, params;
5185 uint16_t ptype, plen;
5187 struct sctp_nets *net;
5190 struct sockaddr_in sin4, *sa4;
5194 struct sockaddr_in6 sin6, *sa6;
5199 memset(&sin4, 0, sizeof(sin4));
5200 sin4.sin_family = AF_INET;
5201 sin4.sin_len = sizeof(sin4);
5204 memset(&sin6, 0, sizeof(sin6));
5205 sin6.sin6_family = AF_INET6;
5206 sin6.sin6_len = sizeof(sin6);
5208 /* First what about the src address of the pkt ? */
5210 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5211 sa = (struct sockaddr *)&net->ro._l_addr;
5212 if (sa->sa_family == src->sa_family) {
5214 if (sa->sa_family == AF_INET) {
5215 struct sockaddr_in *src4;
5217 sa4 = (struct sockaddr_in *)sa;
5218 src4 = (struct sockaddr_in *)src;
5219 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5226 if (sa->sa_family == AF_INET6) {
5227 struct sockaddr_in6 *src6;
5229 sa6 = (struct sockaddr_in6 *)sa;
5230 src6 = (struct sockaddr_in6 *)src;
5231 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5240 /* New address added! no need to look futher. */
5243 /* Ok so far lets munge through the rest of the packet */
5244 offset += sizeof(struct sctp_init_chunk);
5245 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5248 ptype = ntohs(phdr->param_type);
5249 plen = ntohs(phdr->param_length);
5252 case SCTP_IPV4_ADDRESS:
5254 struct sctp_ipv4addr_param *p4, p4_buf;
5256 phdr = sctp_get_next_param(in_initpkt, offset,
5257 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5258 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5262 p4 = (struct sctp_ipv4addr_param *)phdr;
5263 sin4.sin_addr.s_addr = p4->addr;
5264 sa_touse = (struct sockaddr *)&sin4;
5269 case SCTP_IPV6_ADDRESS:
5271 struct sctp_ipv6addr_param *p6, p6_buf;
5273 phdr = sctp_get_next_param(in_initpkt, offset,
5274 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5275 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5279 p6 = (struct sctp_ipv6addr_param *)phdr;
5280 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5282 sa_touse = (struct sockaddr *)&sin6;
5291 /* ok, sa_touse points to one to check */
5293 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5294 sa = (struct sockaddr *)&net->ro._l_addr;
5295 if (sa->sa_family != sa_touse->sa_family) {
5299 if (sa->sa_family == AF_INET) {
5300 sa4 = (struct sockaddr_in *)sa;
5301 if (sa4->sin_addr.s_addr ==
5302 sin4.sin_addr.s_addr) {
5309 if (sa->sa_family == AF_INET6) {
5310 sa6 = (struct sockaddr_in6 *)sa;
5311 if (SCTP6_ARE_ADDR_EQUAL(
5320 /* New addr added! no need to look further */
5324 offset += SCTP_SIZE32(plen);
5325 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5331 * Given a MBUF chain that was sent into us containing an INIT. Build a
5332 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5333 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5334 * message (i.e. the struct sctp_init_msg).
5337 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5338 struct mbuf *init_pkt, int iphlen, int offset,
5339 struct sockaddr *src, struct sockaddr *dst,
5340 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5341 uint8_t use_mflowid, uint32_t mflowid,
5342 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5344 struct sctp_association *asoc;
5345 struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last;
5346 struct sctp_init_ack_chunk *initack;
5347 struct sctp_adaptation_layer_indication *ali;
5348 struct sctp_ecn_supported_param *ecn;
5349 struct sctp_prsctp_supported_param *prsctp;
5350 struct sctp_supported_chunk_types_param *pr_supported;
5351 union sctp_sockstore *over_addr;
5354 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5355 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5356 struct sockaddr_in *sin;
5360 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5361 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5362 struct sockaddr_in6 *sin6;
5365 struct sockaddr *to;
5366 struct sctp_state_cookie stc;
5367 struct sctp_nets *net = NULL;
5368 uint8_t *signature = NULL;
5369 int cnt_inits_to = 0;
5370 uint16_t his_limit, i_want;
5371 int abort_flag, padval;
5374 int nat_friendly = 0;
5383 if ((asoc != NULL) &&
5384 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5385 (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) {
5386 /* new addresses, out of here in non-cookie-wait states */
5388 * Send a ABORT, we don't add the new address error clause
5389 * though we even set the T bit and copy in the 0 tag.. this
5390 * looks no different than if no listener was present.
5392 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, NULL,
5393 use_mflowid, mflowid,
5398 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5399 (offset + sizeof(struct sctp_init_chunk)),
5400 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5403 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5404 init_chk->init.initiate_tag, op_err,
5405 use_mflowid, mflowid,
5409 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
5411 /* No memory, INIT timer will re-attempt. */
5413 sctp_m_freem(op_err);
5416 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
5419 * We might not overwrite the identification[] completely and on
5420 * some platforms time_entered will contain some padding. Therefore
5421 * zero out the cookie to avoid putting uninitialized memory on the
5424 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5426 /* the time I built cookie */
5427 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5429 /* populate any tie tags */
5431 /* unlock before tag selections */
5432 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5433 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5434 stc.cookie_life = asoc->cookie_life;
5435 net = asoc->primary_destination;
5437 stc.tie_tag_my_vtag = 0;
5438 stc.tie_tag_peer_vtag = 0;
5439 /* life I will award this cookie */
5440 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5443 /* copy in the ports for later check */
5444 stc.myport = sh->dest_port;
5445 stc.peerport = sh->src_port;
5448 * If we wanted to honor cookie life extentions, we would add to
5449 * stc.cookie_life. For now we should NOT honor any extension
5451 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5452 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5453 stc.ipv6_addr_legal = 1;
5454 if (SCTP_IPV6_V6ONLY(inp)) {
5455 stc.ipv4_addr_legal = 0;
5457 stc.ipv4_addr_legal = 1;
5460 stc.ipv6_addr_legal = 0;
5461 stc.ipv4_addr_legal = 1;
5463 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5470 switch (dst->sa_family) {
5474 /* lookup address */
5475 stc.address[0] = src4->sin_addr.s_addr;
5479 stc.addr_type = SCTP_IPV4_ADDRESS;
5480 /* local from address */
5481 stc.laddress[0] = dst4->sin_addr.s_addr;
5482 stc.laddress[1] = 0;
5483 stc.laddress[2] = 0;
5484 stc.laddress[3] = 0;
5485 stc.laddr_type = SCTP_IPV4_ADDRESS;
5486 /* scope_id is only for v6 */
5488 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5489 if (IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) {
5494 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5495 /* Must use the address in this case */
5496 if (sctp_is_address_on_local_host(src, vrf_id)) {
5497 stc.loopback_scope = 1;
5500 stc.local_scope = 0;
5508 stc.addr_type = SCTP_IPV6_ADDRESS;
5509 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5510 stc.scope_id = in6_getscope(&src6->sin6_addr);
5511 if (sctp_is_address_on_local_host(src, vrf_id)) {
5512 stc.loopback_scope = 1;
5513 stc.local_scope = 0;
5516 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr)) {
5518 * If the new destination is a
5519 * LINK_LOCAL we must have common
5520 * both site and local scope. Don't
5521 * set local scope though since we
5522 * must depend on the source to be
5523 * added implicitly. We cannot
5524 * assure just because we share one
5525 * link that all links are common.
5527 stc.local_scope = 0;
5531 * we start counting for the private
5532 * address stuff at 1. since the
5533 * link local we source from won't
5534 * show up in our scoped count.
5538 * pull out the scope_id from
5541 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr)) {
5543 * If the new destination is
5544 * SITE_LOCAL then we must have site
5549 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5550 stc.laddr_type = SCTP_IPV6_ADDRESS;
5560 /* set the scope per the existing tcb */
5563 struct sctp_nets *lnet;
5567 stc.loopback_scope = asoc->scope.loopback_scope;
5568 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5569 stc.site_scope = asoc->scope.site_scope;
5570 stc.local_scope = asoc->scope.local_scope;
5572 /* Why do we not consider IPv4 LL addresses? */
5573 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5574 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5575 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5577 * if we have a LL address, start
5585 /* use the net pointer */
5586 to = (struct sockaddr *)&net->ro._l_addr;
5587 switch (to->sa_family) {
5590 sin = (struct sockaddr_in *)to;
5591 stc.address[0] = sin->sin_addr.s_addr;
5595 stc.addr_type = SCTP_IPV4_ADDRESS;
5596 if (net->src_addr_selected == 0) {
5598 * strange case here, the INIT should have
5599 * did the selection.
5601 net->ro._s_addr = sctp_source_address_selection(inp,
5602 stcb, (sctp_route_t *) & net->ro,
5604 if (net->ro._s_addr == NULL)
5607 net->src_addr_selected = 1;
5610 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5611 stc.laddress[1] = 0;
5612 stc.laddress[2] = 0;
5613 stc.laddress[3] = 0;
5614 stc.laddr_type = SCTP_IPV4_ADDRESS;
5615 /* scope_id is only for v6 */
5621 sin6 = (struct sockaddr_in6 *)to;
5622 memcpy(&stc.address, &sin6->sin6_addr,
5623 sizeof(struct in6_addr));
5624 stc.addr_type = SCTP_IPV6_ADDRESS;
5625 stc.scope_id = sin6->sin6_scope_id;
5626 if (net->src_addr_selected == 0) {
5628 * strange case here, the INIT should have
5629 * done the selection.
5631 net->ro._s_addr = sctp_source_address_selection(inp,
5632 stcb, (sctp_route_t *) & net->ro,
5634 if (net->ro._s_addr == NULL)
5637 net->src_addr_selected = 1;
5639 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5640 sizeof(struct in6_addr));
5641 stc.laddr_type = SCTP_IPV6_ADDRESS;
5646 /* Now lets put the SCTP header in place */
5647 initack = mtod(m, struct sctp_init_ack_chunk *);
5648 /* Save it off for quick ref */
5649 stc.peers_vtag = init_chk->init.initiate_tag;
5651 memcpy(stc.identification, SCTP_VERSION_STRING,
5652 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5653 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5654 /* now the chunk header */
5655 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5656 initack->ch.chunk_flags = 0;
5657 /* fill in later from mbuf we build */
5658 initack->ch.chunk_length = 0;
5659 /* place in my tag */
5660 if ((asoc != NULL) &&
5661 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5662 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5663 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5664 /* re-use the v-tags and init-seq here */
5665 initack->init.initiate_tag = htonl(asoc->my_vtag);
5666 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5668 uint32_t vtag, itsn;
5670 if (hold_inp_lock) {
5671 SCTP_INP_INCR_REF(inp);
5672 SCTP_INP_RUNLOCK(inp);
5675 atomic_add_int(&asoc->refcnt, 1);
5676 SCTP_TCB_UNLOCK(stcb);
5678 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5679 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5681 * Got a duplicate vtag on some guy behind a
5682 * nat make sure we don't use it.
5686 initack->init.initiate_tag = htonl(vtag);
5687 /* get a TSN to use too */
5688 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5689 initack->init.initial_tsn = htonl(itsn);
5690 SCTP_TCB_LOCK(stcb);
5691 atomic_add_int(&asoc->refcnt, -1);
5693 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5694 initack->init.initiate_tag = htonl(vtag);
5695 /* get a TSN to use too */
5696 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5698 if (hold_inp_lock) {
5699 SCTP_INP_RLOCK(inp);
5700 SCTP_INP_DECR_REF(inp);
5703 /* save away my tag to */
5704 stc.my_vtag = initack->init.initiate_tag;
5706 /* set up some of the credits. */
5707 so = inp->sctp_socket;
5709 /* memory problem */
5713 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5715 /* set what I want */
5716 his_limit = ntohs(init_chk->init.num_inbound_streams);
5717 /* choose what I want */
5719 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5720 i_want = asoc->streamoutcnt;
5722 i_want = inp->sctp_ep.pre_open_stream_count;
5725 i_want = inp->sctp_ep.pre_open_stream_count;
5727 if (his_limit < i_want) {
5728 /* I Want more :< */
5729 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5731 /* I can have what I want :> */
5732 initack->init.num_outbound_streams = htons(i_want);
5734 /* tell him his limit. */
5735 initack->init.num_inbound_streams =
5736 htons(inp->sctp_ep.max_open_streams_intome);
5738 /* adaptation layer indication parameter */
5739 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5740 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack));
5741 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5742 ali->ph.param_length = htons(sizeof(*ali));
5743 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
5744 SCTP_BUF_LEN(m) += sizeof(*ali);
5745 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
5747 ecn = (struct sctp_ecn_supported_param *)((caddr_t)initack + sizeof(*initack));
5751 if (((asoc != NULL) && (asoc->ecn_allowed == 1)) ||
5752 (inp->sctp_ecn_enable == 1)) {
5753 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
5754 ecn->ph.param_length = htons(sizeof(*ecn));
5755 SCTP_BUF_LEN(m) += sizeof(*ecn);
5757 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
5760 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
5762 /* And now tell the peer we do pr-sctp */
5763 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
5764 prsctp->ph.param_length = htons(sizeof(*prsctp));
5765 SCTP_BUF_LEN(m) += sizeof(*prsctp);
5767 /* Add NAT friendly parameter */
5768 struct sctp_paramhdr *ph;
5770 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5771 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5772 ph->param_length = htons(sizeof(struct sctp_paramhdr));
5773 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
5775 /* And now tell the peer we do all the extensions */
5776 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5777 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5779 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5780 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5781 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5782 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5783 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5784 if (!SCTP_BASE_SYSCTL(sctp_auth_disable))
5785 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5786 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
5787 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5788 p_len = sizeof(*pr_supported) + num_ext;
5789 pr_supported->ph.param_length = htons(p_len);
5790 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
5791 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5793 /* add authentication parameters */
5794 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
5795 struct sctp_auth_random *randp;
5796 struct sctp_auth_hmac_algo *hmacs;
5797 struct sctp_auth_chunk_list *chunks;
5798 uint16_t random_len;
5800 /* generate and add RANDOM parameter */
5801 random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5802 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5803 randp->ph.param_type = htons(SCTP_RANDOM);
5804 p_len = sizeof(*randp) + random_len;
5805 randp->ph.param_length = htons(p_len);
5806 SCTP_READ_RANDOM(randp->random_data, random_len);
5807 /* zero out any padding required */
5808 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
5809 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5811 /* add HMAC_ALGO parameter */
5812 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5813 p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5814 (uint8_t *) hmacs->hmac_ids);
5816 p_len += sizeof(*hmacs);
5817 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5818 hmacs->ph.param_length = htons(p_len);
5819 /* zero out any padding required */
5820 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
5821 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5823 /* add CHUNKS parameter */
5824 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5825 p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5826 chunks->chunk_types);
5828 p_len += sizeof(*chunks);
5829 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5830 chunks->ph.param_length = htons(p_len);
5831 /* zero out any padding required */
5832 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
5833 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5837 /* now the addresses */
5839 struct sctp_scoping scp;
5842 * To optimize this we could put the scoping stuff into a
5843 * structure and remove the individual uint8's from the stc
5844 * structure. Then we could just sifa in the address within
5845 * the stc.. but for now this is a quick hack to get the
5846 * address stuff teased apart.
5848 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5849 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5850 scp.loopback_scope = stc.loopback_scope;
5851 scp.ipv4_local_scope = stc.ipv4_scope;
5852 scp.local_scope = stc.local_scope;
5853 scp.site_scope = stc.site_scope;
5854 m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to, NULL, NULL);
5857 /* tack on the operational error if present */
5866 llen += SCTP_BUF_LEN(ol);
5867 ol = SCTP_BUF_NEXT(ol);
5870 /* must add a pad to the param */
5871 uint32_t cpthis = 0;
5874 padlen = 4 - (llen % 4);
5875 m_copyback(op_err, llen, padlen, (caddr_t)&cpthis);
5877 while (SCTP_BUF_NEXT(m_at) != NULL) {
5878 m_at = SCTP_BUF_NEXT(m_at);
5880 SCTP_BUF_NEXT(m_at) = op_err;
5881 while (SCTP_BUF_NEXT(m_at) != NULL) {
5882 m_at = SCTP_BUF_NEXT(m_at);
5885 /* pre-calulate the size and update pkt header and chunk header */
5887 for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5888 p_len += SCTP_BUF_LEN(m_tmp);
5889 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5890 /* m_tmp should now point to last one */
5895 /* Now we must build a cookie */
5896 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
5897 if (m_cookie == NULL) {
5898 /* memory problem */
5902 /* Now append the cookie to the end and update the space/size */
5903 SCTP_BUF_NEXT(m_tmp) = m_cookie;
5905 for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5906 p_len += SCTP_BUF_LEN(m_tmp);
5907 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5908 /* m_tmp should now point to last one */
5914 * Place in the size, but we don't include the last pad (if any) in
5917 initack->ch.chunk_length = htons(p_len);
5920 * Time to sign the cookie, we don't sign over the cookie signature
5921 * though thus we set trailer.
5923 (void)sctp_hmac_m(SCTP_HMAC,
5924 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
5925 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
5926 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
5928 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
5929 * here since the timer will drive a retranmission.
5932 if ((padval) && (mp_last)) {
5933 /* see my previous comments on mp_last */
5934 if (sctp_add_pad_tombuf(mp_last, (4 - padval))) {
5935 /* Houston we have a problem, no space */
5940 if (stc.loopback_scope) {
5941 over_addr = (union sctp_sockstore *)dst;
5946 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
5948 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
5950 use_mflowid, mflowid,
5951 SCTP_SO_NOT_LOCKED);
5952 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
5957 sctp_prune_prsctp(struct sctp_tcb *stcb,
5958 struct sctp_association *asoc,
5959 struct sctp_sndrcvinfo *srcv,
5963 struct sctp_tmit_chunk *chk, *nchk;
5965 SCTP_TCB_LOCK_ASSERT(stcb);
5966 if ((asoc->peer_supports_prsctp) &&
5967 (asoc->sent_queue_cnt_removeable > 0)) {
5968 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
5970 * Look for chunks marked with the PR_SCTP flag AND
5971 * the buffer space flag. If the one being sent is
5972 * equal or greater priority then purge the old one
5973 * and free some space.
5975 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
5977 * This one is PR-SCTP AND buffer space
5980 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
5982 * Lower numbers equates to higher
5983 * priority so if the one we are
5984 * looking at has a larger or equal
5985 * priority we want to drop the data
5986 * and NOT retransmit it.
5990 * We release the book_size
5991 * if the mbuf is here
5996 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6000 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6003 freed_spc += ret_spc;
6004 if (freed_spc >= dataout) {
6007 } /* if chunk was present */
6008 } /* if of sufficent priority */
6009 } /* if chunk has enabled */
6010 } /* tailqforeach */
6012 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6013 /* Here we must move to the sent queue and mark */
6014 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6015 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6018 * We release the book_size
6019 * if the mbuf is here
6023 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6026 freed_spc += ret_spc;
6027 if (freed_spc >= dataout) {
6030 } /* end if chk->data */
6031 } /* end if right class */
6032 } /* end if chk pr-sctp */
6033 } /* tailqforeachsafe (chk) */
6034 } /* if enabled in asoc */
6038 sctp_get_frag_point(struct sctp_tcb *stcb,
6039 struct sctp_association *asoc)
6044 * For endpoints that have both v6 and v4 addresses we must reserve
6045 * room for the ipv6 header, for those that are only dealing with V4
6046 * we use a larger frag point.
6048 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6049 ovh = SCTP_MED_OVERHEAD;
6051 ovh = SCTP_MED_V4_OVERHEAD;
6054 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6055 siz = asoc->smallest_mtu - ovh;
6057 siz = (stcb->asoc.sctp_frag_point - ovh);
6059 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6061 /* A data chunk MUST fit in a cluster */
6062 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6065 /* adjust for an AUTH chunk if DATA requires auth */
6066 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6067 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6070 /* make it an even word boundary please */
6077 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6080 * We assume that the user wants PR_SCTP_TTL if the user provides a
6081 * positive lifetime but does not specify any PR_SCTP policy. This
6082 * is a BAD assumption and causes problems at least with the
6083 * U-Vancovers MPI folks. I will change this to be no policy means
6086 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6087 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6091 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6092 case CHUNK_FLAGS_PR_SCTP_BUF:
6094 * Time to live is a priority stored in tv_sec when doing
6095 * the buffer drop thing.
6097 sp->ts.tv_sec = sp->timetolive;
6100 case CHUNK_FLAGS_PR_SCTP_TTL:
6104 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6105 tv.tv_sec = sp->timetolive / 1000;
6106 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6108 * TODO sctp_constants.h needs alternative time
6109 * macros when _KERNEL is undefined.
6111 timevaladd(&sp->ts, &tv);
6114 case CHUNK_FLAGS_PR_SCTP_RTX:
6116 * Time to live is a the number or retransmissions stored in
6119 sp->ts.tv_sec = sp->timetolive;
6123 SCTPDBG(SCTP_DEBUG_USRREQ1,
6124 "Unknown PR_SCTP policy %u.\n",
6125 PR_SCTP_POLICY(sp->sinfo_flags));
6131 sctp_msg_append(struct sctp_tcb *stcb,
6132 struct sctp_nets *net,
6134 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6138 struct sctp_stream_queue_pending *sp = NULL;
6139 struct sctp_stream_out *strm;
6142 * Given an mbuf chain, put it into the association send queue and
6143 * place it on the wheel
6145 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6146 /* Invalid stream number */
6147 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6151 if ((stcb->asoc.stream_locked) &&
6152 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6153 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6157 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6158 /* Now can we send this? */
6159 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6160 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6161 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6162 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6163 /* got data while shutting down */
6164 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6168 sctp_alloc_a_strmoq(stcb, sp);
6170 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6174 sp->sinfo_flags = srcv->sinfo_flags;
6175 sp->timetolive = srcv->sinfo_timetolive;
6176 sp->ppid = srcv->sinfo_ppid;
6177 sp->context = srcv->sinfo_context;
6178 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6180 atomic_add_int(&sp->net->ref_count, 1);
6184 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6185 sp->stream = srcv->sinfo_stream;
6186 sp->msg_is_complete = 1;
6187 sp->sender_all_done = 1;
6190 sp->tail_mbuf = NULL;
6191 sctp_set_prsctp_policy(sp);
6193 * We could in theory (for sendall) sifa the length in, but we would
6194 * still have to hunt through the chain since we need to setup the
6198 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6199 if (SCTP_BUF_NEXT(at) == NULL)
6201 sp->length += SCTP_BUF_LEN(at);
6203 if (srcv->sinfo_keynumber_valid) {
6204 sp->auth_keyid = srcv->sinfo_keynumber;
6206 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6208 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6209 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6210 sp->holds_key_ref = 1;
6212 if (hold_stcb_lock == 0) {
6213 SCTP_TCB_SEND_LOCK(stcb);
6215 sctp_snd_sb_alloc(stcb, sp->length);
6216 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6217 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6218 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6220 if (hold_stcb_lock == 0) {
6221 SCTP_TCB_SEND_UNLOCK(stcb);
6231 static struct mbuf *
6232 sctp_copy_mbufchain(struct mbuf *clonechain,
6233 struct mbuf *outchain,
6234 struct mbuf **endofchain,
6237 uint8_t copy_by_ref)
6240 struct mbuf *appendchain;
6244 if (endofchain == NULL) {
6248 sctp_m_freem(outchain);
6251 if (can_take_mbuf) {
6252 appendchain = clonechain;
6255 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6257 /* Its not in a cluster */
6258 if (*endofchain == NULL) {
6259 /* lets get a mbuf cluster */
6260 if (outchain == NULL) {
6261 /* This is the general case */
6263 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6264 if (outchain == NULL) {
6267 SCTP_BUF_LEN(outchain) = 0;
6268 *endofchain = outchain;
6269 /* get the prepend space */
6270 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6273 * We really should not get a NULL
6279 if (SCTP_BUF_NEXT(m) == NULL) {
6283 m = SCTP_BUF_NEXT(m);
6286 if (*endofchain == NULL) {
6288 * huh, TSNH XXX maybe we
6291 sctp_m_freem(outchain);
6295 /* get the new end of length */
6296 len = M_TRAILINGSPACE(*endofchain);
6298 /* how much is left at the end? */
6299 len = M_TRAILINGSPACE(*endofchain);
6301 /* Find the end of the data, for appending */
6302 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6304 /* Now lets copy it out */
6305 if (len >= sizeofcpy) {
6306 /* It all fits, copy it in */
6307 m_copydata(clonechain, 0, sizeofcpy, cp);
6308 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6310 /* fill up the end of the chain */
6312 m_copydata(clonechain, 0, len, cp);
6313 SCTP_BUF_LEN((*endofchain)) += len;
6314 /* now we need another one */
6317 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6322 SCTP_BUF_NEXT((*endofchain)) = m;
6324 cp = mtod((*endofchain), caddr_t);
6325 m_copydata(clonechain, len, sizeofcpy, cp);
6326 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6330 /* copy the old fashion way */
6331 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_DONTWAIT);
6332 #ifdef SCTP_MBUF_LOGGING
6333 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6336 for (mat = appendchain; mat; mat = SCTP_BUF_NEXT(mat)) {
6337 if (SCTP_BUF_IS_EXTENDED(mat)) {
6338 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6345 if (appendchain == NULL) {
6348 sctp_m_freem(outchain);
6352 /* tack on to the end */
6353 if (*endofchain != NULL) {
6354 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6358 if (SCTP_BUF_NEXT(m) == NULL) {
6359 SCTP_BUF_NEXT(m) = appendchain;
6362 m = SCTP_BUF_NEXT(m);
6366 * save off the end and update the end-chain postion
6370 if (SCTP_BUF_NEXT(m) == NULL) {
6374 m = SCTP_BUF_NEXT(m);
6378 /* save off the end and update the end-chain postion */
6381 if (SCTP_BUF_NEXT(m) == NULL) {
6385 m = SCTP_BUF_NEXT(m);
6387 return (appendchain);
6392 sctp_med_chunk_output(struct sctp_inpcb *inp,
6393 struct sctp_tcb *stcb,
6394 struct sctp_association *asoc,
6397 int control_only, int from_where,
6398 struct timeval *now, int *now_filled, int frag_point, int so_locked
6399 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6405 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6406 uint32_t val SCTP_UNUSED)
6408 struct sctp_copy_all *ca;
6411 int added_control = 0;
6412 int un_sent, do_chunk_output = 1;
6413 struct sctp_association *asoc;
6414 struct sctp_nets *net;
6416 ca = (struct sctp_copy_all *)ptr;
6417 if (ca->m == NULL) {
6420 if (ca->inp != inp) {
6424 if (ca->sndlen > 0) {
6425 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_DONTWAIT);
6427 /* can't copy so we are done */
6431 #ifdef SCTP_MBUF_LOGGING
6432 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6435 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6436 if (SCTP_BUF_IS_EXTENDED(mat)) {
6437 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6445 SCTP_TCB_LOCK_ASSERT(stcb);
6446 if (stcb->asoc.alternate) {
6447 net = stcb->asoc.alternate;
6449 net = stcb->asoc.primary_destination;
6451 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6452 /* Abort this assoc with m as the user defined reason */
6454 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6456 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6457 0, M_NOWAIT, 1, MT_DATA);
6458 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6461 struct sctp_paramhdr *ph;
6463 ph = mtod(m, struct sctp_paramhdr *);
6464 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6465 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
6468 * We add one here to keep the assoc from dis-appearing on
6471 atomic_add_int(&stcb->asoc.refcnt, 1);
6472 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6474 * sctp_abort_an_association calls sctp_free_asoc() free
6475 * association will NOT free it since we incremented the
6476 * refcnt .. we do this to prevent it being freed and things
6477 * getting tricky since we could end up (from free_asoc)
6478 * calling inpcb_free which would get a recursive lock call
6479 * to the iterator lock.. But as a consequence of that the
6480 * stcb will return to us un-locked.. since free_asoc
6481 * returns with either no TCB or the TCB unlocked, we must
6482 * relock.. to unlock in the iterator timer :-0
6484 SCTP_TCB_LOCK(stcb);
6485 atomic_add_int(&stcb->asoc.refcnt, -1);
6486 goto no_chunk_output;
6489 ret = sctp_msg_append(stcb, net, m,
6493 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6494 /* shutdown this assoc */
6497 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6499 if (TAILQ_EMPTY(&asoc->send_queue) &&
6500 TAILQ_EMPTY(&asoc->sent_queue) &&
6502 if (asoc->locked_on_sending) {
6506 * there is nothing queued to send, so I'm
6509 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6510 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6511 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6513 * only send SHUTDOWN the first time
6516 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6517 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6519 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6520 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6521 sctp_stop_timers_for_shutdown(stcb);
6522 sctp_send_shutdown(stcb, net);
6523 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6525 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6526 asoc->primary_destination);
6528 do_chunk_output = 0;
6532 * we still got (or just got) data to send,
6533 * so set SHUTDOWN_PENDING
6536 * XXX sockets draft says that SCTP_EOF
6537 * should be sent with no data. currently,
6538 * we will allow user data to be sent first
6539 * and move to SHUTDOWN-PENDING
6541 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6542 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6543 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6544 if (asoc->locked_on_sending) {
6546 * Locked to send out the
6549 struct sctp_stream_queue_pending *sp;
6551 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6553 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6554 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6557 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6558 if (TAILQ_EMPTY(&asoc->send_queue) &&
6559 TAILQ_EMPTY(&asoc->sent_queue) &&
6560 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6562 atomic_add_int(&stcb->asoc.refcnt, 1);
6563 sctp_abort_an_association(stcb->sctp_ep, stcb,
6564 NULL, SCTP_SO_NOT_LOCKED);
6565 atomic_add_int(&stcb->asoc.refcnt, -1);
6566 goto no_chunk_output;
6568 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6569 asoc->primary_destination);
6575 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6576 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6578 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6579 (stcb->asoc.total_flight > 0) &&
6580 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6581 do_chunk_output = 0;
6583 if (do_chunk_output)
6584 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6585 else if (added_control) {
6586 int num_out = 0, reason = 0, now_filled = 0;
6590 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6591 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6592 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6603 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6605 struct sctp_copy_all *ca;
6607 ca = (struct sctp_copy_all *)ptr;
6609 * Do a notify here? Kacheong suggests that the notify be done at
6610 * the send time.. so you would push up a notification if any send
6611 * failed. Don't know if this is feasable since the only failures we
6612 * have is "memory" related and if you cannot get an mbuf to send
6613 * the data you surely can't get an mbuf to send up to notify the
6614 * user you can't send the data :->
6617 /* now free everything */
6618 sctp_m_freem(ca->m);
6619 SCTP_FREE(ca, SCTP_M_COPYAL);
6623 #define MC_ALIGN(m, len) do { \
6624 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \
6629 static struct mbuf *
6630 sctp_copy_out_all(struct uio *uio, int len)
6632 struct mbuf *ret, *at;
6633 int left, willcpy, cancpy, error;
6635 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAIT, 1, MT_DATA);
6641 SCTP_BUF_LEN(ret) = 0;
6642 /* save space for the data chunk header */
6643 cancpy = M_TRAILINGSPACE(ret);
6644 willcpy = min(cancpy, left);
6647 /* Align data to the end */
6648 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6654 SCTP_BUF_LEN(at) = willcpy;
6655 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6658 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAIT, 1, MT_DATA);
6659 if (SCTP_BUF_NEXT(at) == NULL) {
6662 at = SCTP_BUF_NEXT(at);
6663 SCTP_BUF_LEN(at) = 0;
6664 cancpy = M_TRAILINGSPACE(at);
6665 willcpy = min(cancpy, left);
6672 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6673 struct sctp_sndrcvinfo *srcv)
6676 struct sctp_copy_all *ca;
6678 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6682 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6685 memset(ca, 0, sizeof(struct sctp_copy_all));
6689 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6692 * take off the sendall flag, it would be bad if we failed to do
6695 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6696 /* get length and mbuf chain */
6698 ca->sndlen = uio->uio_resid;
6699 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6700 if (ca->m == NULL) {
6701 SCTP_FREE(ca, SCTP_M_COPYAL);
6702 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6706 /* Gather the length of the send */
6710 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6711 ca->sndlen += SCTP_BUF_LEN(mat);
6714 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6715 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6716 SCTP_ASOC_ANY_STATE,
6718 sctp_sendall_completes, inp, 1);
6720 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6721 SCTP_FREE(ca, SCTP_M_COPYAL);
6722 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6730 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6732 struct sctp_tmit_chunk *chk, *nchk;
6734 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6735 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6736 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6738 sctp_m_freem(chk->data);
6741 asoc->ctrl_queue_cnt--;
6742 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6748 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6750 struct sctp_association *asoc;
6751 struct sctp_tmit_chunk *chk, *nchk;
6752 struct sctp_asconf_chunk *acp;
6755 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6756 /* find SCTP_ASCONF chunk in queue */
6757 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6759 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6760 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6765 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6767 sctp_m_freem(chk->data);
6770 asoc->ctrl_queue_cnt--;
6771 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6778 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6779 struct sctp_association *asoc,
6780 struct sctp_tmit_chunk **data_list,
6782 struct sctp_nets *net)
6785 struct sctp_tmit_chunk *tp1;
6787 for (i = 0; i < bundle_at; i++) {
6788 /* off of the send queue */
6789 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6790 asoc->send_queue_cnt--;
6793 * Any chunk NOT 0 you zap the time chunk 0 gets
6794 * zapped or set based on if a RTO measurment is
6797 data_list[i]->do_rtt = 0;
6800 data_list[i]->sent_rcv_time = net->last_sent_time;
6801 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6802 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6803 if (data_list[i]->whoTo == NULL) {
6804 data_list[i]->whoTo = net;
6805 atomic_add_int(&net->ref_count, 1);
6807 /* on to the sent queue */
6808 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6809 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6810 struct sctp_tmit_chunk *tpp;
6812 /* need to move back */
6814 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6816 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6820 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6823 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6825 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6830 /* This does not lower until the cum-ack passes it */
6831 asoc->sent_queue_cnt++;
6832 if ((asoc->peers_rwnd <= 0) &&
6833 (asoc->total_flight == 0) &&
6835 /* Mark the chunk as being a window probe */
6836 SCTP_STAT_INCR(sctps_windowprobed);
6838 #ifdef SCTP_AUDITING_ENABLED
6839 sctp_audit_log(0xC2, 3);
6841 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6842 data_list[i]->snd_count = 1;
6843 data_list[i]->rec.data.chunk_was_revoked = 0;
6844 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6845 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6846 data_list[i]->whoTo->flight_size,
6847 data_list[i]->book_size,
6848 (uintptr_t) data_list[i]->whoTo,
6849 data_list[i]->rec.data.TSN_seq);
6851 sctp_flight_size_increase(data_list[i]);
6852 sctp_total_flight_increase(stcb, data_list[i]);
6853 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6854 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6855 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6857 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6858 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6859 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6860 /* SWS sender side engages */
6861 asoc->peers_rwnd = 0;
6864 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6865 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
6870 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
6871 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6876 struct sctp_tmit_chunk *chk, *nchk;
6878 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6879 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
6880 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
6881 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
6882 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
6883 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
6884 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
6885 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
6886 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
6887 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
6888 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
6889 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
6890 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
6891 /* Stray chunks must be cleaned up */
6893 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6895 sctp_m_freem(chk->data);
6898 asoc->ctrl_queue_cnt--;
6899 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
6900 asoc->fwd_tsn_cnt--;
6901 sctp_free_a_chunk(stcb, chk, so_locked);
6902 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
6903 /* special handling, we must look into the param */
6904 if (chk != asoc->str_reset) {
6905 goto clean_up_anyway;
6913 sctp_can_we_split_this(struct sctp_tcb *stcb,
6915 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
6918 * Make a decision on if I should split a msg into multiple parts.
6919 * This is only asked of incomplete messages.
6923 * If we are doing EEOR we need to always send it if its the
6924 * entire thing, since it might be all the guy is putting in
6927 if (goal_mtu >= length) {
6929 * If we have data outstanding,
6930 * we get another chance when the sack
6931 * arrives to transmit - wait for more data
6933 if (stcb->asoc.total_flight == 0) {
6935 * If nothing is in flight, we zero the
6943 /* You can fill the rest */
6948 * For those strange folk that make the send buffer
6949 * smaller than our fragmentation point, we can't
6950 * get a full msg in so we have to allow splitting.
6952 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
6955 if ((length <= goal_mtu) ||
6956 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
6957 /* Sub-optimial residual don't split in non-eeor mode. */
6961 * If we reach here length is larger than the goal_mtu. Do we wish
6962 * to split it for the sake of packet putting together?
6964 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
6965 /* Its ok to split it */
6966 return (min(goal_mtu, frag_point));
6968 /* Nope, can't split */
6974 sctp_move_to_outqueue(struct sctp_tcb *stcb,
6975 struct sctp_stream_out *strq,
6977 uint32_t frag_point,
6983 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6988 /* Move from the stream to the send_queue keeping track of the total */
6989 struct sctp_association *asoc;
6990 struct sctp_stream_queue_pending *sp;
6991 struct sctp_tmit_chunk *chk;
6992 struct sctp_data_chunk *dchkh;
6993 uint32_t to_move, length;
6994 uint8_t rcv_flags = 0;
6996 uint8_t send_lock_up = 0;
6998 SCTP_TCB_LOCK_ASSERT(stcb);
7001 /* sa_ignore FREED_MEMORY */
7002 sp = TAILQ_FIRST(&strq->outqueue);
7005 if (send_lock_up == 0) {
7006 SCTP_TCB_SEND_LOCK(stcb);
7009 sp = TAILQ_FIRST(&strq->outqueue);
7013 if (strq->last_msg_incomplete) {
7014 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7016 strq->last_msg_incomplete);
7017 strq->last_msg_incomplete = 0;
7021 SCTP_TCB_SEND_UNLOCK(stcb);
7026 if ((sp->msg_is_complete) && (sp->length == 0)) {
7027 if (sp->sender_all_done) {
7029 * We are doing differed cleanup. Last time through
7030 * when we took all the data the sender_all_done was
7033 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7034 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7035 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7036 sp->sender_all_done,
7038 sp->msg_is_complete,
7042 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7043 SCTP_TCB_SEND_LOCK(stcb);
7046 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7047 TAILQ_REMOVE(&strq->outqueue, sp, next);
7048 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7050 sctp_free_remote_addr(sp->net);
7054 sctp_m_freem(sp->data);
7057 sctp_free_a_strmoq(stcb, sp, so_locked);
7058 /* we can't be locked to it */
7060 stcb->asoc.locked_on_sending = NULL;
7062 SCTP_TCB_SEND_UNLOCK(stcb);
7065 /* back to get the next msg */
7069 * sender just finished this but still holds a
7078 /* is there some to get */
7079 if (sp->length == 0) {
7085 } else if (sp->discard_rest) {
7086 if (send_lock_up == 0) {
7087 SCTP_TCB_SEND_LOCK(stcb);
7090 /* Whack down the size */
7091 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7092 if ((stcb->sctp_socket != NULL) && \
7093 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7094 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7095 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7098 sctp_m_freem(sp->data);
7100 sp->tail_mbuf = NULL;
7110 some_taken = sp->some_taken;
7111 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7112 sp->msg_is_complete = 1;
7115 length = sp->length;
7116 if (sp->msg_is_complete) {
7117 /* The message is complete */
7118 to_move = min(length, frag_point);
7119 if (to_move == length) {
7120 /* All of it fits in the MTU */
7121 if (sp->some_taken) {
7122 rcv_flags |= SCTP_DATA_LAST_FRAG;
7123 sp->put_last_out = 1;
7125 rcv_flags |= SCTP_DATA_NOT_FRAG;
7126 sp->put_last_out = 1;
7129 /* Not all of it fits, we fragment */
7130 if (sp->some_taken == 0) {
7131 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7136 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7139 * We use a snapshot of length in case it
7140 * is expanding during the compare.
7145 if (to_move >= llen) {
7147 if (send_lock_up == 0) {
7149 * We are taking all of an incomplete msg
7150 * thus we need a send lock.
7152 SCTP_TCB_SEND_LOCK(stcb);
7154 if (sp->msg_is_complete) {
7156 * the sender finished the
7163 if (sp->some_taken == 0) {
7164 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7168 /* Nothing to take. */
7169 if (sp->some_taken) {
7178 /* If we reach here, we can copy out a chunk */
7179 sctp_alloc_a_chunk(stcb, chk);
7181 /* No chunk memory */
7187 * Setup for unordered if needed by looking at the user sent info
7190 if (sp->sinfo_flags & SCTP_UNORDERED) {
7191 rcv_flags |= SCTP_DATA_UNORDERED;
7193 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7194 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7195 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7197 /* clear out the chunk before setting up */
7198 memset(chk, 0, sizeof(*chk));
7199 chk->rec.data.rcv_flags = rcv_flags;
7201 if (to_move >= length) {
7202 /* we think we can steal the whole thing */
7203 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7204 SCTP_TCB_SEND_LOCK(stcb);
7207 if (to_move < sp->length) {
7208 /* bail, it changed */
7211 chk->data = sp->data;
7212 chk->last_mbuf = sp->tail_mbuf;
7213 /* register the stealing */
7214 sp->data = sp->tail_mbuf = NULL;
7219 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_DONTWAIT);
7220 chk->last_mbuf = NULL;
7221 if (chk->data == NULL) {
7222 sp->some_taken = some_taken;
7223 sctp_free_a_chunk(stcb, chk, so_locked);
7228 #ifdef SCTP_MBUF_LOGGING
7229 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7232 for (mat = chk->data; mat; mat = SCTP_BUF_NEXT(mat)) {
7233 if (SCTP_BUF_IS_EXTENDED(mat)) {
7234 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
7239 /* Pull off the data */
7240 m_adj(sp->data, to_move);
7241 /* Now lets work our way down and compact it */
7243 while (m && (SCTP_BUF_LEN(m) == 0)) {
7244 sp->data = SCTP_BUF_NEXT(m);
7245 SCTP_BUF_NEXT(m) = NULL;
7246 if (sp->tail_mbuf == m) {
7248 * Freeing tail? TSNH since
7249 * we supposedly were taking less
7250 * than the sp->length.
7253 panic("Huh, freing tail? - TSNH");
7255 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7256 sp->tail_mbuf = sp->data = NULL;
7265 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7266 chk->copy_by_ref = 1;
7268 chk->copy_by_ref = 0;
7271 * get last_mbuf and counts of mb useage This is ugly but hopefully
7272 * its only one mbuf.
7274 if (chk->last_mbuf == NULL) {
7275 chk->last_mbuf = chk->data;
7276 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7277 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7280 if (to_move > length) {
7281 /*- This should not happen either
7282 * since we always lower to_move to the size
7283 * of sp->length if its larger.
7286 panic("Huh, how can to_move be larger?");
7288 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7292 atomic_subtract_int(&sp->length, to_move);
7294 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7295 /* Not enough room for a chunk header, get some */
7298 m = sctp_get_mbuf_for_msg(1, 0, M_DONTWAIT, 0, MT_DATA);
7301 * we're in trouble here. _PREPEND below will free
7302 * all the data if there is no leading space, so we
7303 * must put the data back and restore.
7305 if (send_lock_up == 0) {
7306 SCTP_TCB_SEND_LOCK(stcb);
7309 if (chk->data == NULL) {
7310 /* unsteal the data */
7311 sp->data = chk->data;
7312 sp->tail_mbuf = chk->last_mbuf;
7316 /* reassemble the data */
7318 sp->data = chk->data;
7319 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7321 sp->some_taken = some_taken;
7322 atomic_add_int(&sp->length, to_move);
7325 sctp_free_a_chunk(stcb, chk, so_locked);
7329 SCTP_BUF_LEN(m) = 0;
7330 SCTP_BUF_NEXT(m) = chk->data;
7332 M_ALIGN(chk->data, 4);
7335 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT);
7336 if (chk->data == NULL) {
7337 /* HELP, TSNH since we assured it would not above? */
7339 panic("prepend failes HELP?");
7341 SCTP_PRINTF("prepend fails HELP?\n");
7342 sctp_free_a_chunk(stcb, chk, so_locked);
7348 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7349 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7350 chk->book_size_scale = 0;
7351 chk->sent = SCTP_DATAGRAM_UNSENT;
7354 chk->asoc = &stcb->asoc;
7355 chk->pad_inplace = 0;
7356 chk->no_fr_allowed = 0;
7357 chk->rec.data.stream_seq = strq->next_sequence_send;
7358 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7359 strq->next_sequence_send++;
7361 chk->rec.data.stream_number = sp->stream;
7362 chk->rec.data.payloadtype = sp->ppid;
7363 chk->rec.data.context = sp->context;
7364 chk->rec.data.doing_fast_retransmit = 0;
7366 chk->rec.data.timetodrop = sp->ts;
7367 chk->flags = sp->act_flags;
7370 chk->whoTo = sp->net;
7371 atomic_add_int(&chk->whoTo->ref_count, 1);
7375 if (sp->holds_key_ref) {
7376 chk->auth_keyid = sp->auth_keyid;
7377 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7378 chk->holds_key_ref = 1;
7380 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7381 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7382 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7383 (uintptr_t) stcb, sp->length,
7384 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7385 chk->rec.data.TSN_seq);
7387 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7389 * Put the rest of the things in place now. Size was done earlier in
7390 * previous loop prior to padding.
7393 #ifdef SCTP_ASOCLOG_OF_TSNS
7394 SCTP_TCB_LOCK_ASSERT(stcb);
7395 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7396 asoc->tsn_out_at = 0;
7397 asoc->tsn_out_wrapped = 1;
7399 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7400 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7401 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7402 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7403 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7404 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7405 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7406 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7410 dchkh->ch.chunk_type = SCTP_DATA;
7411 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7412 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7413 dchkh->dp.stream_id = htons(strq->stream_no);
7414 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7415 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7416 dchkh->ch.chunk_length = htons(chk->send_size);
7417 /* Now advance the chk->send_size by the actual pad needed. */
7418 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7423 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7424 if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) {
7425 chk->pad_inplace = 1;
7427 if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) {
7428 /* pad added an mbuf */
7429 chk->last_mbuf = lm;
7431 chk->send_size += pads;
7433 if (PR_SCTP_ENABLED(chk->flags)) {
7434 asoc->pr_sctp_cnt++;
7436 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7437 /* All done pull and kill the message */
7438 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7439 if (sp->put_last_out == 0) {
7440 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7441 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7442 sp->sender_all_done,
7444 sp->msg_is_complete,
7448 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7449 SCTP_TCB_SEND_LOCK(stcb);
7452 TAILQ_REMOVE(&strq->outqueue, sp, next);
7453 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7455 sctp_free_remote_addr(sp->net);
7459 sctp_m_freem(sp->data);
7462 sctp_free_a_strmoq(stcb, sp, so_locked);
7464 /* we can't be locked to it */
7466 stcb->asoc.locked_on_sending = NULL;
7468 /* more to go, we are locked */
7471 asoc->chunks_on_out_queue++;
7472 strq->chunks_on_queues++;
7473 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7474 asoc->send_queue_cnt++;
7477 SCTP_TCB_SEND_UNLOCK(stcb);
7484 sctp_fill_outqueue(struct sctp_tcb *stcb,
7485 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7486 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7491 struct sctp_association *asoc;
7492 struct sctp_stream_out *strq;
7493 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7496 SCTP_TCB_LOCK_ASSERT(stcb);
7498 switch (net->ro._l_addr.sa.sa_family) {
7501 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7506 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7511 goal_mtu = net->mtu;
7514 /* Need an allowance for the data chunk header too */
7515 goal_mtu -= sizeof(struct sctp_data_chunk);
7517 /* must make even word boundary */
7518 goal_mtu &= 0xfffffffc;
7519 if (asoc->locked_on_sending) {
7520 /* We are stuck on one stream until the message completes. */
7521 strq = asoc->locked_on_sending;
7524 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7527 while ((goal_mtu > 0) && strq) {
7530 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7531 &giveup, eeor_mode, &bail, so_locked);
7533 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7536 asoc->locked_on_sending = strq;
7537 if ((moved_how_much == 0) || (giveup) || bail)
7538 /* no more to move for now */
7541 asoc->locked_on_sending = NULL;
7542 if ((giveup) || bail) {
7545 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7550 total_moved += moved_how_much;
7551 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7552 goal_mtu &= 0xfffffffc;
7557 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7559 if (total_moved == 0) {
7560 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7561 (net == stcb->asoc.primary_destination)) {
7562 /* ran dry for primary network net */
7563 SCTP_STAT_INCR(sctps_primary_randry);
7564 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7565 /* ran dry with CMT on */
7566 SCTP_STAT_INCR(sctps_cmt_randry);
7572 sctp_fix_ecn_echo(struct sctp_association *asoc)
7574 struct sctp_tmit_chunk *chk;
7576 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7577 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7578 chk->sent = SCTP_DATAGRAM_UNSENT;
7584 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7586 struct sctp_association *asoc;
7587 struct sctp_tmit_chunk *chk;
7588 struct sctp_stream_queue_pending *sp;
7595 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7596 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7597 if (sp->net == net) {
7598 sctp_free_remote_addr(sp->net);
7603 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7604 if (chk->whoTo == net) {
7605 sctp_free_remote_addr(chk->whoTo);
7612 sctp_med_chunk_output(struct sctp_inpcb *inp,
7613 struct sctp_tcb *stcb,
7614 struct sctp_association *asoc,
7617 int control_only, int from_where,
7618 struct timeval *now, int *now_filled, int frag_point, int so_locked
7619 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7625 * Ok this is the generic chunk service queue. we must do the
7626 * following: - Service the stream queue that is next, moving any
7627 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7628 * LAST to the out queue in one pass) and assigning TSN's - Check to
7629 * see if the cwnd/rwnd allows any output, if so we go ahead and
7630 * fomulate and send the low level chunks. Making sure to combine
7631 * any control in the control chunk queue also.
7633 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7634 struct mbuf *outchain, *endoutchain;
7635 struct sctp_tmit_chunk *chk, *nchk;
7637 /* temp arrays for unlinking */
7638 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7639 int no_fragmentflg, error;
7640 unsigned int max_rwnd_per_dest, max_send_per_dest;
7641 int one_chunk, hbflag, skip_data_for_this_net;
7642 int asconf, cookie, no_out_cnt;
7643 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7644 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7646 uint32_t auth_offset = 0;
7647 struct sctp_auth_chunk *auth = NULL;
7648 uint16_t auth_keyid;
7649 int override_ok = 1;
7650 int skip_fill_up = 0;
7651 int data_auth_reqd = 0;
7654 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7660 auth_keyid = stcb->asoc.authinfo.active_keyid;
7662 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7663 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7664 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7669 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7671 * First lets prime the pump. For each destination, if there is room
7672 * in the flight size, attempt to pull an MTU's worth out of the
7673 * stream queues into the general send_queue
7675 #ifdef SCTP_AUDITING_ENABLED
7676 sctp_audit_log(0xC2, 2);
7678 SCTP_TCB_LOCK_ASSERT(stcb);
7680 if ((control_only) || (asoc->stream_reset_outstanding))
7685 /* Nothing to possible to send? */
7686 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7687 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7688 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7689 TAILQ_EMPTY(&asoc->send_queue) &&
7690 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7695 if (asoc->peers_rwnd == 0) {
7696 /* No room in peers rwnd */
7698 if (asoc->total_flight > 0) {
7699 /* we are allowed one chunk in flight */
7703 if (stcb->asoc.ecn_echo_cnt_onq) {
7704 /* Record where a sack goes, if any */
7705 if (no_data_chunks &&
7706 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7707 /* Nothing but ECNe to send - we don't do that */
7708 goto nothing_to_send;
7710 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7711 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7712 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7713 sack_goes_to = chk->whoTo;
7718 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7719 if (stcb->sctp_socket)
7720 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7722 max_send_per_dest = 0;
7723 if (no_data_chunks == 0) {
7724 /* How many non-directed chunks are there? */
7725 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7726 if (chk->whoTo == NULL) {
7728 * We already have non-directed chunks on
7729 * the queue, no need to do a fill-up.
7737 if ((no_data_chunks == 0) &&
7738 (skip_fill_up == 0) &&
7739 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7740 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7742 * This for loop we are in takes in each net, if
7743 * its's got space in cwnd and has data sent to it
7744 * (when CMT is off) then it calls
7745 * sctp_fill_outqueue for the net. This gets data on
7746 * the send queue for that network.
7748 * In sctp_fill_outqueue TSN's are assigned and data is
7749 * copied out of the stream buffers. Note mostly
7750 * copy by reference (we hope).
7752 net->window_probe = 0;
7753 if ((net != stcb->asoc.alternate) &&
7754 ((net->dest_state & SCTP_ADDR_PF) ||
7755 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7756 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7757 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7758 sctp_log_cwnd(stcb, net, 1,
7759 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7763 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7764 (net->flight_size == 0)) {
7765 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7767 if (net->flight_size >= net->cwnd) {
7768 /* skip this network, no room - can't fill */
7769 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7770 sctp_log_cwnd(stcb, net, 3,
7771 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7775 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7776 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7778 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7780 /* memory alloc failure */
7786 /* now service each destination and send out what we can for it */
7787 /* Nothing to send? */
7788 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7789 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7790 TAILQ_EMPTY(&asoc->send_queue)) {
7794 if (asoc->sctp_cmt_on_off > 0) {
7795 /* get the last start point */
7796 start_at = asoc->last_net_cmt_send_started;
7797 if (start_at == NULL) {
7798 /* null so to beginning */
7799 start_at = TAILQ_FIRST(&asoc->nets);
7801 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7802 if (start_at == NULL) {
7803 start_at = TAILQ_FIRST(&asoc->nets);
7806 asoc->last_net_cmt_send_started = start_at;
7808 start_at = TAILQ_FIRST(&asoc->nets);
7810 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7811 if (chk->whoTo == NULL) {
7812 if (asoc->alternate) {
7813 chk->whoTo = asoc->alternate;
7815 chk->whoTo = asoc->primary_destination;
7817 atomic_add_int(&chk->whoTo->ref_count, 1);
7820 old_start_at = NULL;
7821 again_one_more_time:
7822 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7823 /* how much can we send? */
7824 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7825 if (old_start_at && (old_start_at == net)) {
7826 /* through list ocmpletely. */
7830 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7831 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7832 (net->flight_size >= net->cwnd)) {
7834 * Nothing on control or asconf and flight is full,
7835 * we can skip even in the CMT case.
7840 endoutchain = outchain = NULL;
7843 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7844 skip_data_for_this_net = 1;
7846 skip_data_for_this_net = 0;
7848 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7850 * if we have a route and an ifp check to see if we
7851 * have room to send to this guy
7855 ifp = net->ro.ro_rt->rt_ifp;
7856 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
7857 SCTP_STAT_INCR(sctps_ifnomemqueued);
7858 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
7859 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
7864 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7867 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
7872 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
7882 if (mtu > asoc->peers_rwnd) {
7883 if (asoc->total_flight > 0) {
7884 /* We have a packet in flight somewhere */
7885 r_mtu = asoc->peers_rwnd;
7887 /* We are always allowed to send one MTU out */
7894 /************************/
7895 /* ASCONF transmission */
7896 /************************/
7897 /* Now first lets go through the asconf queue */
7898 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
7899 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
7902 if (chk->whoTo == NULL) {
7903 if (asoc->alternate == NULL) {
7904 if (asoc->primary_destination != net) {
7908 if (asoc->alternate != net) {
7913 if (chk->whoTo != net) {
7917 if (chk->data == NULL) {
7920 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
7921 chk->sent != SCTP_DATAGRAM_RESEND) {
7925 * if no AUTH is yet included and this chunk
7926 * requires it, make sure to account for it. We
7927 * don't apply the size until the AUTH chunk is
7928 * actually added below in case there is no room for
7929 * this chunk. NOTE: we overload the use of "omtu"
7932 if ((auth == NULL) &&
7933 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
7934 stcb->asoc.peer_auth_chunks)) {
7935 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
7938 /* Here we do NOT factor the r_mtu */
7939 if ((chk->send_size < (int)(mtu - omtu)) ||
7940 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
7942 * We probably should glom the mbuf chain
7943 * from the chk->data for control but the
7944 * problem is it becomes yet one more level
7945 * of tracking to do if for some reason
7946 * output fails. Then I have got to
7947 * reconstruct the merged control chain.. el
7948 * yucko.. for now we take the easy way and
7952 * Add an AUTH chunk, if chunk requires it
7953 * save the offset into the chain for AUTH
7955 if ((auth == NULL) &&
7956 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
7957 stcb->asoc.peer_auth_chunks))) {
7958 outchain = sctp_add_auth_chunk(outchain,
7963 chk->rec.chunk_id.id);
7964 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
7966 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
7967 (int)chk->rec.chunk_id.can_take_data,
7968 chk->send_size, chk->copy_by_ref);
7969 if (outchain == NULL) {
7971 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
7974 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
7975 /* update our MTU size */
7976 if (mtu > (chk->send_size + omtu))
7977 mtu -= (chk->send_size + omtu);
7980 to_out += (chk->send_size + omtu);
7981 /* Do clear IP_DF ? */
7982 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
7985 if (chk->rec.chunk_id.can_take_data)
7988 * set hb flag since we can use these for
7994 * should sysctl this: don't bundle data
7995 * with ASCONF since it requires AUTH
7998 chk->sent = SCTP_DATAGRAM_SENT;
7999 if (chk->whoTo == NULL) {
8001 atomic_add_int(&net->ref_count, 1);
8006 * Ok we are out of room but we can
8007 * output without effecting the
8008 * flight size since this little guy
8009 * is a control only packet.
8011 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8013 * do NOT clear the asconf flag as
8014 * it is used to do appropriate
8015 * source address selection.
8017 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8018 (struct sockaddr *)&net->ro._l_addr,
8019 outchain, auth_offset, auth,
8020 stcb->asoc.authinfo.active_keyid,
8021 no_fragmentflg, 0, asconf,
8022 inp->sctp_lport, stcb->rport,
8023 htonl(stcb->asoc.peer_vtag),
8027 if (error == ENOBUFS) {
8028 asoc->ifp_had_enobuf = 1;
8029 SCTP_STAT_INCR(sctps_lowlevelerr);
8031 if (from_where == 0) {
8032 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8034 if (*now_filled == 0) {
8035 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8037 *now = net->last_sent_time;
8039 net->last_sent_time = *now;
8042 /* error, could not output */
8043 if (error == EHOSTUNREACH) {
8049 sctp_move_chunks_from_net(stcb, net);
8054 asoc->ifp_had_enobuf = 0;
8055 if (*now_filled == 0) {
8056 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8058 *now = net->last_sent_time;
8060 net->last_sent_time = *now;
8064 * increase the number we sent, if a
8065 * cookie is sent we don't tell them
8068 outchain = endoutchain = NULL;
8072 *num_out += ctl_cnt;
8073 /* recalc a clean slate and setup */
8074 switch (net->ro._l_addr.sa.sa_family) {
8077 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8082 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8095 /************************/
8096 /* Control transmission */
8097 /************************/
8098 /* Now first lets go through the control queue */
8099 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8100 if ((sack_goes_to) &&
8101 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8102 (chk->whoTo != sack_goes_to)) {
8104 * if we have a sack in queue, and we are
8105 * looking at an ecn echo that is NOT queued
8106 * to where the sack is going..
8108 if (chk->whoTo == net) {
8110 * Don't transmit it to where its
8111 * going (current net)
8114 } else if (sack_goes_to == net) {
8116 * But do transmit it to this
8119 goto skip_net_check;
8122 if (chk->whoTo == NULL) {
8123 if (asoc->alternate == NULL) {
8124 if (asoc->primary_destination != net) {
8128 if (asoc->alternate != net) {
8133 if (chk->whoTo != net) {
8138 if (chk->data == NULL) {
8141 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8143 * It must be unsent. Cookies and ASCONF's
8144 * hang around but there timers will force
8145 * when marked for resend.
8150 * if no AUTH is yet included and this chunk
8151 * requires it, make sure to account for it. We
8152 * don't apply the size until the AUTH chunk is
8153 * actually added below in case there is no room for
8154 * this chunk. NOTE: we overload the use of "omtu"
8157 if ((auth == NULL) &&
8158 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8159 stcb->asoc.peer_auth_chunks)) {
8160 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8163 /* Here we do NOT factor the r_mtu */
8164 if ((chk->send_size <= (int)(mtu - omtu)) ||
8165 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8167 * We probably should glom the mbuf chain
8168 * from the chk->data for control but the
8169 * problem is it becomes yet one more level
8170 * of tracking to do if for some reason
8171 * output fails. Then I have got to
8172 * reconstruct the merged control chain.. el
8173 * yucko.. for now we take the easy way and
8177 * Add an AUTH chunk, if chunk requires it
8178 * save the offset into the chain for AUTH
8180 if ((auth == NULL) &&
8181 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8182 stcb->asoc.peer_auth_chunks))) {
8183 outchain = sctp_add_auth_chunk(outchain,
8188 chk->rec.chunk_id.id);
8189 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8191 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8192 (int)chk->rec.chunk_id.can_take_data,
8193 chk->send_size, chk->copy_by_ref);
8194 if (outchain == NULL) {
8196 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8199 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8200 /* update our MTU size */
8201 if (mtu > (chk->send_size + omtu))
8202 mtu -= (chk->send_size + omtu);
8205 to_out += (chk->send_size + omtu);
8206 /* Do clear IP_DF ? */
8207 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8210 if (chk->rec.chunk_id.can_take_data)
8212 /* Mark things to be removed, if needed */
8213 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8214 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8215 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8216 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8217 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8218 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8219 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8220 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8221 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8222 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8223 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8224 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8227 /* remove these chunks at the end */
8228 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8229 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8230 /* turn off the timer */
8231 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8232 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8233 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8239 * Other chunks, since they have
8240 * timers running (i.e. COOKIE) we
8241 * just "trust" that it gets sent or
8245 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8248 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8250 * Increment ecne send count
8251 * here this means we may be
8252 * over-zealous in our
8253 * counting if the send
8254 * fails, but its the best
8255 * place to do it (we used
8256 * to do it in the queue of
8257 * the chunk, but that did
8258 * not tell how many times
8261 SCTP_STAT_INCR(sctps_sendecne);
8263 chk->sent = SCTP_DATAGRAM_SENT;
8264 if (chk->whoTo == NULL) {
8266 atomic_add_int(&net->ref_count, 1);
8272 * Ok we are out of room but we can
8273 * output without effecting the
8274 * flight size since this little guy
8275 * is a control only packet.
8278 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8280 * do NOT clear the asconf
8281 * flag as it is used to do
8282 * appropriate source
8283 * address selection.
8287 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8290 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8291 (struct sockaddr *)&net->ro._l_addr,
8294 stcb->asoc.authinfo.active_keyid,
8295 no_fragmentflg, 0, asconf,
8296 inp->sctp_lport, stcb->rport,
8297 htonl(stcb->asoc.peer_vtag),
8301 if (error == ENOBUFS) {
8302 asoc->ifp_had_enobuf = 1;
8303 SCTP_STAT_INCR(sctps_lowlevelerr);
8305 if (from_where == 0) {
8306 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8308 /* error, could not output */
8310 if (*now_filled == 0) {
8311 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8313 *now = net->last_sent_time;
8315 net->last_sent_time = *now;
8319 if (error == EHOSTUNREACH) {
8325 sctp_move_chunks_from_net(stcb, net);
8330 asoc->ifp_had_enobuf = 0;
8331 /* Only HB or ASCONF advances time */
8333 if (*now_filled == 0) {
8334 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8336 *now = net->last_sent_time;
8338 net->last_sent_time = *now;
8343 * increase the number we sent, if a
8344 * cookie is sent we don't tell them
8347 outchain = endoutchain = NULL;
8351 *num_out += ctl_cnt;
8352 /* recalc a clean slate and setup */
8353 switch (net->ro._l_addr.sa.sa_family) {
8356 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8361 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8374 /* JRI: if dest is in PF state, do not send data to it */
8375 if ((asoc->sctp_cmt_on_off > 0) &&
8376 (net != stcb->asoc.alternate) &&
8377 (net->dest_state & SCTP_ADDR_PF)) {
8380 if (net->flight_size >= net->cwnd) {
8383 if ((asoc->sctp_cmt_on_off > 0) &&
8384 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8385 (net->flight_size > max_rwnd_per_dest)) {
8389 * We need a specific accounting for the usage of the send
8390 * buffer. We also need to check the number of messages per
8391 * net. For now, this is better than nothing and it disabled
8394 if ((asoc->sctp_cmt_on_off > 0) &&
8395 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8396 (max_send_per_dest > 0) &&
8397 (net->flight_size > max_send_per_dest)) {
8400 /*********************/
8401 /* Data transmission */
8402 /*********************/
8404 * if AUTH for DATA is required and no AUTH has been added
8405 * yet, account for this in the mtu now... if no data can be
8406 * bundled, this adjustment won't matter anyways since the
8407 * packet will be going out...
8409 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8410 stcb->asoc.peer_auth_chunks);
8411 if (data_auth_reqd && (auth == NULL)) {
8412 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8414 /* now lets add any data within the MTU constraints */
8415 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8418 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8419 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8426 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8427 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8437 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8438 (skip_data_for_this_net == 0)) ||
8440 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8441 if (no_data_chunks) {
8442 /* let only control go out */
8446 if (net->flight_size >= net->cwnd) {
8447 /* skip this net, no room for data */
8451 if ((chk->whoTo != NULL) &&
8452 (chk->whoTo != net)) {
8453 /* Don't send the chunk on this net */
8456 if (asoc->sctp_cmt_on_off == 0) {
8457 if ((asoc->alternate) &&
8458 (asoc->alternate != net) &&
8459 (chk->whoTo == NULL)) {
8461 } else if ((net != asoc->primary_destination) &&
8462 (asoc->alternate == NULL) &&
8463 (chk->whoTo == NULL)) {
8467 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8469 * strange, we have a chunk that is
8470 * to big for its destination and
8471 * yet no fragment ok flag.
8472 * Something went wrong when the
8473 * PMTU changed...we did not mark
8474 * this chunk for some reason?? I
8475 * will fix it here by letting IP
8476 * fragment it for now and printing
8477 * a warning. This really should not
8480 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8481 chk->send_size, mtu);
8482 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8484 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8485 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8486 struct sctp_data_chunk *dchkh;
8488 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8489 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8491 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8492 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8493 /* ok we will add this one */
8496 * Add an AUTH chunk, if chunk
8497 * requires it, save the offset into
8498 * the chain for AUTH
8500 if (data_auth_reqd) {
8502 outchain = sctp_add_auth_chunk(outchain,
8508 auth_keyid = chk->auth_keyid;
8510 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8511 } else if (override_ok) {
8516 auth_keyid = chk->auth_keyid;
8518 } else if (auth_keyid != chk->auth_keyid) {
8526 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8527 chk->send_size, chk->copy_by_ref);
8528 if (outchain == NULL) {
8529 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8530 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8531 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8534 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8537 /* upate our MTU size */
8538 /* Do clear IP_DF ? */
8539 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8542 /* unsigned subtraction of mtu */
8543 if (mtu > chk->send_size)
8544 mtu -= chk->send_size;
8547 /* unsigned subtraction of r_mtu */
8548 if (r_mtu > chk->send_size)
8549 r_mtu -= chk->send_size;
8553 to_out += chk->send_size;
8554 if ((to_out > mx_mtu) && no_fragmentflg) {
8556 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8558 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8562 chk->window_probe = 0;
8563 data_list[bundle_at++] = chk;
8564 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8567 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8568 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8569 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8571 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8573 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8574 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8584 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8586 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8587 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8588 data_list[0]->window_probe = 1;
8589 net->window_probe = 1;
8595 * Must be sent in order of the
8596 * TSN's (on a network)
8600 } /* for (chunk gather loop for this net) */
8601 } /* if asoc.state OPEN */
8603 /* Is there something to send for this destination? */
8605 /* We may need to start a control timer or two */
8607 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8610 * do NOT clear the asconf flag as it is
8611 * used to do appropriate source address
8616 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8619 /* must start a send timer if data is being sent */
8620 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8622 * no timer running on this destination
8625 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8627 /* Now send it, if there is anything to send :> */
8628 if ((error = sctp_lowlevel_chunk_output(inp,
8631 (struct sockaddr *)&net->ro._l_addr,
8639 inp->sctp_lport, stcb->rport,
8640 htonl(stcb->asoc.peer_vtag),
8644 /* error, we could not output */
8645 if (error == ENOBUFS) {
8646 SCTP_STAT_INCR(sctps_lowlevelerr);
8647 asoc->ifp_had_enobuf = 1;
8649 if (from_where == 0) {
8650 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8652 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8654 if (*now_filled == 0) {
8655 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8657 *now = net->last_sent_time;
8659 net->last_sent_time = *now;
8663 if (error == EHOSTUNREACH) {
8665 * Destination went unreachable
8668 sctp_move_chunks_from_net(stcb, net);
8672 * I add this line to be paranoid. As far as
8673 * I can tell the continue, takes us back to
8674 * the top of the for, but just to make sure
8675 * I will reset these again here.
8677 ctl_cnt = bundle_at = 0;
8678 continue; /* This takes us back to the
8679 * for() for the nets. */
8681 asoc->ifp_had_enobuf = 0;
8686 if (bundle_at || hbflag) {
8687 /* For data/asconf and hb set time */
8688 if (*now_filled == 0) {
8689 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8691 *now = net->last_sent_time;
8693 net->last_sent_time = *now;
8697 *num_out += (ctl_cnt + bundle_at);
8700 /* setup for a RTO measurement */
8701 tsns_sent = data_list[0]->rec.data.TSN_seq;
8702 /* fill time if not already filled */
8703 if (*now_filled == 0) {
8704 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8706 *now = asoc->time_last_sent;
8708 asoc->time_last_sent = *now;
8710 if (net->rto_needed) {
8711 data_list[0]->do_rtt = 1;
8712 net->rto_needed = 0;
8714 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8715 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8721 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8722 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8725 if (old_start_at == NULL) {
8726 old_start_at = start_at;
8727 start_at = TAILQ_FIRST(&asoc->nets);
8729 goto again_one_more_time;
8732 * At the end there should be no NON timed chunks hanging on this
8735 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8736 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8738 if ((*num_out == 0) && (*reason_code == 0)) {
8743 sctp_clean_up_ctl(stcb, asoc, so_locked);
8748 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8751 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8752 * the control chunk queue.
8754 struct sctp_chunkhdr *hdr;
8755 struct sctp_tmit_chunk *chk;
8758 SCTP_TCB_LOCK_ASSERT(stcb);
8759 sctp_alloc_a_chunk(stcb, chk);
8762 sctp_m_freem(op_err);
8765 chk->copy_by_ref = 0;
8766 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT);
8767 if (op_err == NULL) {
8768 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8773 while (mat != NULL) {
8774 chk->send_size += SCTP_BUF_LEN(mat);
8775 mat = SCTP_BUF_NEXT(mat);
8777 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8778 chk->rec.chunk_id.can_take_data = 1;
8779 chk->sent = SCTP_DATAGRAM_UNSENT;
8782 chk->asoc = &stcb->asoc;
8785 hdr = mtod(op_err, struct sctp_chunkhdr *);
8786 hdr->chunk_type = SCTP_OPERATION_ERROR;
8787 hdr->chunk_flags = 0;
8788 hdr->chunk_length = htons(chk->send_size);
8789 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8792 chk->asoc->ctrl_queue_cnt++;
8796 sctp_send_cookie_echo(struct mbuf *m,
8798 struct sctp_tcb *stcb,
8799 struct sctp_nets *net)
8802 * pull out the cookie and put it at the front of the control chunk
8806 struct mbuf *cookie;
8807 struct sctp_paramhdr parm, *phdr;
8808 struct sctp_chunkhdr *hdr;
8809 struct sctp_tmit_chunk *chk;
8810 uint16_t ptype, plen;
8812 /* First find the cookie in the param area */
8814 at = offset + sizeof(struct sctp_init_chunk);
8816 SCTP_TCB_LOCK_ASSERT(stcb);
8818 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8822 ptype = ntohs(phdr->param_type);
8823 plen = ntohs(phdr->param_length);
8824 if (ptype == SCTP_STATE_COOKIE) {
8827 /* found the cookie */
8828 if ((pad = (plen % 4))) {
8831 cookie = SCTP_M_COPYM(m, at, plen, M_DONTWAIT);
8832 if (cookie == NULL) {
8836 #ifdef SCTP_MBUF_LOGGING
8837 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8840 for (mat = cookie; mat; mat = SCTP_BUF_NEXT(mat)) {
8841 if (SCTP_BUF_IS_EXTENDED(mat)) {
8842 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8849 at += SCTP_SIZE32(plen);
8851 if (cookie == NULL) {
8852 /* Did not find the cookie */
8855 /* ok, we got the cookie lets change it into a cookie echo chunk */
8857 /* first the change from param to cookie */
8858 hdr = mtod(cookie, struct sctp_chunkhdr *);
8859 hdr->chunk_type = SCTP_COOKIE_ECHO;
8860 hdr->chunk_flags = 0;
8861 /* get the chunk stuff now and place it in the FRONT of the queue */
8862 sctp_alloc_a_chunk(stcb, chk);
8865 sctp_m_freem(cookie);
8868 chk->copy_by_ref = 0;
8869 chk->send_size = plen;
8870 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8871 chk->rec.chunk_id.can_take_data = 0;
8872 chk->sent = SCTP_DATAGRAM_UNSENT;
8874 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8875 chk->asoc = &stcb->asoc;
8878 atomic_add_int(&chk->whoTo->ref_count, 1);
8879 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8880 chk->asoc->ctrl_queue_cnt++;
8885 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
8889 struct sctp_nets *net)
8892 * take a HB request and make it into a HB ack and send it.
8894 struct mbuf *outchain;
8895 struct sctp_chunkhdr *chdr;
8896 struct sctp_tmit_chunk *chk;
8900 /* must have a net pointer */
8903 outchain = SCTP_M_COPYM(m, offset, chk_length, M_DONTWAIT);
8904 if (outchain == NULL) {
8905 /* gak out of memory */
8908 #ifdef SCTP_MBUF_LOGGING
8909 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8912 for (mat = outchain; mat; mat = SCTP_BUF_NEXT(mat)) {
8913 if (SCTP_BUF_IS_EXTENDED(mat)) {
8914 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8919 chdr = mtod(outchain, struct sctp_chunkhdr *);
8920 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
8921 chdr->chunk_flags = 0;
8922 if (chk_length % 4) {
8924 uint32_t cpthis = 0;
8927 padlen = 4 - (chk_length % 4);
8928 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
8930 sctp_alloc_a_chunk(stcb, chk);
8933 sctp_m_freem(outchain);
8936 chk->copy_by_ref = 0;
8937 chk->send_size = chk_length;
8938 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
8939 chk->rec.chunk_id.can_take_data = 1;
8940 chk->sent = SCTP_DATAGRAM_UNSENT;
8943 chk->asoc = &stcb->asoc;
8944 chk->data = outchain;
8946 atomic_add_int(&chk->whoTo->ref_count, 1);
8947 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8948 chk->asoc->ctrl_queue_cnt++;
8952 sctp_send_cookie_ack(struct sctp_tcb *stcb)
8954 /* formulate and queue a cookie-ack back to sender */
8955 struct mbuf *cookie_ack;
8956 struct sctp_chunkhdr *hdr;
8957 struct sctp_tmit_chunk *chk;
8960 SCTP_TCB_LOCK_ASSERT(stcb);
8962 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
8963 if (cookie_ack == NULL) {
8967 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
8968 sctp_alloc_a_chunk(stcb, chk);
8971 sctp_m_freem(cookie_ack);
8974 chk->copy_by_ref = 0;
8975 chk->send_size = sizeof(struct sctp_chunkhdr);
8976 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
8977 chk->rec.chunk_id.can_take_data = 1;
8978 chk->sent = SCTP_DATAGRAM_UNSENT;
8981 chk->asoc = &stcb->asoc;
8982 chk->data = cookie_ack;
8983 if (chk->asoc->last_control_chunk_from != NULL) {
8984 chk->whoTo = chk->asoc->last_control_chunk_from;
8985 atomic_add_int(&chk->whoTo->ref_count, 1);
8989 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
8990 hdr->chunk_type = SCTP_COOKIE_ACK;
8991 hdr->chunk_flags = 0;
8992 hdr->chunk_length = htons(chk->send_size);
8993 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
8994 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8995 chk->asoc->ctrl_queue_cnt++;
9001 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9003 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9004 struct mbuf *m_shutdown_ack;
9005 struct sctp_shutdown_ack_chunk *ack_cp;
9006 struct sctp_tmit_chunk *chk;
9008 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9009 if (m_shutdown_ack == NULL) {
9013 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9014 sctp_alloc_a_chunk(stcb, chk);
9017 sctp_m_freem(m_shutdown_ack);
9020 chk->copy_by_ref = 0;
9021 chk->send_size = sizeof(struct sctp_chunkhdr);
9022 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9023 chk->rec.chunk_id.can_take_data = 1;
9024 chk->sent = SCTP_DATAGRAM_UNSENT;
9027 chk->asoc = &stcb->asoc;
9028 chk->data = m_shutdown_ack;
9031 atomic_add_int(&chk->whoTo->ref_count, 1);
9033 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9034 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9035 ack_cp->ch.chunk_flags = 0;
9036 ack_cp->ch.chunk_length = htons(chk->send_size);
9037 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9038 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9039 chk->asoc->ctrl_queue_cnt++;
9044 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9046 /* formulate and queue a SHUTDOWN to the sender */
9047 struct mbuf *m_shutdown;
9048 struct sctp_shutdown_chunk *shutdown_cp;
9049 struct sctp_tmit_chunk *chk;
9051 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9052 if (m_shutdown == NULL) {
9056 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9057 sctp_alloc_a_chunk(stcb, chk);
9060 sctp_m_freem(m_shutdown);
9063 chk->copy_by_ref = 0;
9064 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9065 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9066 chk->rec.chunk_id.can_take_data = 1;
9067 chk->sent = SCTP_DATAGRAM_UNSENT;
9070 chk->asoc = &stcb->asoc;
9071 chk->data = m_shutdown;
9074 atomic_add_int(&chk->whoTo->ref_count, 1);
9076 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9077 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9078 shutdown_cp->ch.chunk_flags = 0;
9079 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9080 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9081 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9082 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9083 chk->asoc->ctrl_queue_cnt++;
9088 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9091 * formulate and queue an ASCONF to the peer. ASCONF parameters
9092 * should be queued on the assoc queue.
9094 struct sctp_tmit_chunk *chk;
9095 struct mbuf *m_asconf;
9098 SCTP_TCB_LOCK_ASSERT(stcb);
9100 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9101 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9102 /* can't send a new one if there is one in flight already */
9105 /* compose an ASCONF chunk, maximum length is PMTU */
9106 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9107 if (m_asconf == NULL) {
9110 sctp_alloc_a_chunk(stcb, chk);
9113 sctp_m_freem(m_asconf);
9116 chk->copy_by_ref = 0;
9117 chk->data = m_asconf;
9118 chk->send_size = len;
9119 chk->rec.chunk_id.id = SCTP_ASCONF;
9120 chk->rec.chunk_id.can_take_data = 0;
9121 chk->sent = SCTP_DATAGRAM_UNSENT;
9123 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9124 chk->asoc = &stcb->asoc;
9127 atomic_add_int(&chk->whoTo->ref_count, 1);
9129 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9130 chk->asoc->ctrl_queue_cnt++;
9135 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9138 * formulate and queue a asconf-ack back to sender. the asconf-ack
9139 * must be stored in the tcb.
9141 struct sctp_tmit_chunk *chk;
9142 struct sctp_asconf_ack *ack, *latest_ack;
9144 struct sctp_nets *net = NULL;
9146 SCTP_TCB_LOCK_ASSERT(stcb);
9147 /* Get the latest ASCONF-ACK */
9148 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9149 if (latest_ack == NULL) {
9152 if (latest_ack->last_sent_to != NULL &&
9153 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9154 /* we're doing a retransmission */
9155 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9158 if (stcb->asoc.last_control_chunk_from == NULL) {
9159 if (stcb->asoc.alternate) {
9160 net = stcb->asoc.alternate;
9162 net = stcb->asoc.primary_destination;
9165 net = stcb->asoc.last_control_chunk_from;
9170 if (stcb->asoc.last_control_chunk_from == NULL) {
9171 if (stcb->asoc.alternate) {
9172 net = stcb->asoc.alternate;
9174 net = stcb->asoc.primary_destination;
9177 net = stcb->asoc.last_control_chunk_from;
9180 latest_ack->last_sent_to = net;
9182 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9183 if (ack->data == NULL) {
9186 /* copy the asconf_ack */
9187 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_DONTWAIT);
9188 if (m_ack == NULL) {
9189 /* couldn't copy it */
9192 #ifdef SCTP_MBUF_LOGGING
9193 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9196 for (mat = m_ack; mat; mat = SCTP_BUF_NEXT(mat)) {
9197 if (SCTP_BUF_IS_EXTENDED(mat)) {
9198 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9204 sctp_alloc_a_chunk(stcb, chk);
9208 sctp_m_freem(m_ack);
9211 chk->copy_by_ref = 0;
9215 atomic_add_int(&chk->whoTo->ref_count, 1);
9220 chk->send_size = ack->len;
9221 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9222 chk->rec.chunk_id.can_take_data = 1;
9223 chk->sent = SCTP_DATAGRAM_UNSENT;
9225 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */
9226 chk->asoc = &stcb->asoc;
9228 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9229 chk->asoc->ctrl_queue_cnt++;
9236 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9237 struct sctp_tcb *stcb,
9238 struct sctp_association *asoc,
9239 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9240 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9246 * send out one MTU of retransmission. If fast_retransmit is
9247 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9248 * rwnd. For a Cookie or Asconf in the control chunk queue we
9249 * retransmit them by themselves.
9251 * For data chunks we will pick out the lowest TSN's in the sent_queue
9252 * marked for resend and bundle them all together (up to a MTU of
9253 * destination). The address to send to should have been
9254 * selected/changed where the retransmission was marked (i.e. in FR
9255 * or t3-timeout routines).
9257 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9258 struct sctp_tmit_chunk *chk, *fwd;
9259 struct mbuf *m, *endofchain;
9260 struct sctp_nets *net = NULL;
9261 uint32_t tsns_sent = 0;
9262 int no_fragmentflg, bundle_at, cnt_thru;
9264 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9265 struct sctp_auth_chunk *auth = NULL;
9266 uint32_t auth_offset = 0;
9267 uint16_t auth_keyid;
9268 int override_ok = 1;
9269 int data_auth_reqd = 0;
9272 SCTP_TCB_LOCK_ASSERT(stcb);
9273 tmr_started = ctl_cnt = bundle_at = error = 0;
9278 endofchain = m = NULL;
9279 auth_keyid = stcb->asoc.authinfo.active_keyid;
9280 #ifdef SCTP_AUDITING_ENABLED
9281 sctp_audit_log(0xC3, 1);
9283 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9284 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9285 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9286 asoc->sent_queue_retran_cnt);
9287 asoc->sent_queue_cnt = 0;
9288 asoc->sent_queue_cnt_removeable = 0;
9289 /* send back 0/0 so we enter normal transmission */
9293 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9294 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9295 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9296 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9297 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9300 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9301 if (chk != asoc->str_reset) {
9303 * not eligible for retran if its
9310 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9314 * Add an AUTH chunk, if chunk requires it save the
9315 * offset into the chain for AUTH
9317 if ((auth == NULL) &&
9318 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9319 stcb->asoc.peer_auth_chunks))) {
9320 m = sctp_add_auth_chunk(m, &endofchain,
9321 &auth, &auth_offset,
9323 chk->rec.chunk_id.id);
9324 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9326 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9332 /* do we have control chunks to retransmit? */
9334 /* Start a timer no matter if we suceed or fail */
9335 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9336 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9337 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9338 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9339 chk->snd_count++; /* update our count */
9340 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9341 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9342 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9343 no_fragmentflg, 0, 0,
9344 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9345 chk->whoTo->port, NULL,
9348 SCTP_STAT_INCR(sctps_lowlevelerr);
9355 * We don't want to mark the net->sent time here since this
9356 * we use this for HB and retrans cannot measure RTT
9358 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9360 chk->sent = SCTP_DATAGRAM_SENT;
9361 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9365 /* Clean up the fwd-tsn list */
9366 sctp_clean_up_ctl(stcb, asoc, so_locked);
9371 * Ok, it is just data retransmission we need to do or that and a
9372 * fwd-tsn with it all.
9374 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9375 return (SCTP_RETRAN_DONE);
9377 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9378 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9379 /* not yet open, resend the cookie and that is it */
9382 #ifdef SCTP_AUDITING_ENABLED
9383 sctp_auditing(20, inp, stcb, NULL);
9385 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9386 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9387 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9388 /* No, not sent to this net or not ready for rtx */
9391 if (chk->data == NULL) {
9392 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9393 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9396 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9397 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9398 /* Gak, we have exceeded max unlucky retran, abort! */
9399 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9401 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9402 atomic_add_int(&stcb->asoc.refcnt, 1);
9403 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked);
9404 SCTP_TCB_LOCK(stcb);
9405 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9406 return (SCTP_RETRAN_EXIT);
9408 /* pick up the net */
9410 switch (net->ro._l_addr.sa.sa_family) {
9413 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9418 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9427 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9428 /* No room in peers rwnd */
9431 tsn = asoc->last_acked_seq + 1;
9432 if (tsn == chk->rec.data.TSN_seq) {
9434 * we make a special exception for this
9435 * case. The peer has no rwnd but is missing
9436 * the lowest chunk.. which is probably what
9437 * is holding up the rwnd.
9439 goto one_chunk_around;
9444 if (asoc->peers_rwnd < mtu) {
9446 if ((asoc->peers_rwnd == 0) &&
9447 (asoc->total_flight == 0)) {
9448 chk->window_probe = 1;
9449 chk->whoTo->window_probe = 1;
9452 #ifdef SCTP_AUDITING_ENABLED
9453 sctp_audit_log(0xC3, 2);
9457 net->fast_retran_ip = 0;
9458 if (chk->rec.data.doing_fast_retransmit == 0) {
9460 * if no FR in progress skip destination that have
9461 * flight_size > cwnd.
9463 if (net->flight_size >= net->cwnd) {
9468 * Mark the destination net to have FR recovery
9472 net->fast_retran_ip = 1;
9476 * if no AUTH is yet included and this chunk requires it,
9477 * make sure to account for it. We don't apply the size
9478 * until the AUTH chunk is actually added below in case
9479 * there is no room for this chunk.
9481 if (data_auth_reqd && (auth == NULL)) {
9482 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9486 if ((chk->send_size <= (mtu - dmtu)) ||
9487 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9488 /* ok we will add this one */
9489 if (data_auth_reqd) {
9491 m = sctp_add_auth_chunk(m,
9497 auth_keyid = chk->auth_keyid;
9499 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9500 } else if (override_ok) {
9501 auth_keyid = chk->auth_keyid;
9503 } else if (chk->auth_keyid != auth_keyid) {
9504 /* different keyid, so done bundling */
9508 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9510 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9513 /* Do clear IP_DF ? */
9514 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9517 /* upate our MTU size */
9518 if (mtu > (chk->send_size + dmtu))
9519 mtu -= (chk->send_size + dmtu);
9522 data_list[bundle_at++] = chk;
9523 if (one_chunk && (asoc->total_flight <= 0)) {
9524 SCTP_STAT_INCR(sctps_windowprobed);
9527 if (one_chunk == 0) {
9529 * now are there anymore forward from chk to pick
9532 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9533 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9534 /* Nope, not for retran */
9537 if (fwd->whoTo != net) {
9538 /* Nope, not the net in question */
9541 if (data_auth_reqd && (auth == NULL)) {
9542 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9545 if (fwd->send_size <= (mtu - dmtu)) {
9546 if (data_auth_reqd) {
9548 m = sctp_add_auth_chunk(m,
9554 auth_keyid = fwd->auth_keyid;
9556 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9557 } else if (override_ok) {
9558 auth_keyid = fwd->auth_keyid;
9560 } else if (fwd->auth_keyid != auth_keyid) {
9568 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9570 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9573 /* Do clear IP_DF ? */
9574 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9577 /* upate our MTU size */
9578 if (mtu > (fwd->send_size + dmtu))
9579 mtu -= (fwd->send_size + dmtu);
9582 data_list[bundle_at++] = fwd;
9583 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9587 /* can't fit so we are done */
9592 /* Is there something to send for this destination? */
9595 * No matter if we fail/or suceed we should start a
9596 * timer. A failure is like a lost IP packet :-)
9598 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9600 * no timer running on this destination
9603 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9606 /* Now lets send it, if there is anything to send :> */
9607 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9608 (struct sockaddr *)&net->ro._l_addr, m,
9609 auth_offset, auth, auth_keyid,
9610 no_fragmentflg, 0, 0,
9611 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9615 /* error, we could not output */
9616 SCTP_STAT_INCR(sctps_lowlevelerr);
9624 * We don't want to mark the net->sent time here
9625 * since this we use this for HB and retrans cannot
9628 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9630 /* For auto-close */
9632 if (*now_filled == 0) {
9633 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9634 *now = asoc->time_last_sent;
9637 asoc->time_last_sent = *now;
9639 *cnt_out += bundle_at;
9640 #ifdef SCTP_AUDITING_ENABLED
9641 sctp_audit_log(0xC4, bundle_at);
9644 tsns_sent = data_list[0]->rec.data.TSN_seq;
9646 for (i = 0; i < bundle_at; i++) {
9647 SCTP_STAT_INCR(sctps_sendretransdata);
9648 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9650 * When we have a revoked data, and we
9651 * retransmit it, then we clear the revoked
9652 * flag since this flag dictates if we
9653 * subtracted from the fs
9655 if (data_list[i]->rec.data.chunk_was_revoked) {
9656 /* Deflate the cwnd */
9657 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9658 data_list[i]->rec.data.chunk_was_revoked = 0;
9660 data_list[i]->snd_count++;
9661 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9662 /* record the time */
9663 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9664 if (data_list[i]->book_size_scale) {
9666 * need to double the book size on
9669 data_list[i]->book_size_scale = 0;
9671 * Since we double the booksize, we
9672 * must also double the output queue
9673 * size, since this get shrunk when
9674 * we free by this amount.
9676 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9677 data_list[i]->book_size *= 2;
9681 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9682 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9683 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9685 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9686 (uint32_t) (data_list[i]->send_size +
9687 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9689 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9690 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9691 data_list[i]->whoTo->flight_size,
9692 data_list[i]->book_size,
9693 (uintptr_t) data_list[i]->whoTo,
9694 data_list[i]->rec.data.TSN_seq);
9696 sctp_flight_size_increase(data_list[i]);
9697 sctp_total_flight_increase(stcb, data_list[i]);
9698 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9699 /* SWS sender side engages */
9700 asoc->peers_rwnd = 0;
9703 (data_list[i]->rec.data.doing_fast_retransmit)) {
9704 SCTP_STAT_INCR(sctps_sendfastretrans);
9705 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9706 (tmr_started == 0)) {
9708 * ok we just fast-retrans'd
9709 * the lowest TSN, i.e the
9710 * first on the list. In
9711 * this case we want to give
9712 * some more time to get a
9713 * SACK back without a
9716 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9717 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
9718 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9722 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9723 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9725 #ifdef SCTP_AUDITING_ENABLED
9726 sctp_auditing(21, inp, stcb, NULL);
9732 if (asoc->sent_queue_retran_cnt <= 0) {
9733 /* all done we have no more to retran */
9734 asoc->sent_queue_retran_cnt = 0;
9738 /* No more room in rwnd */
9741 /* stop the for loop here. we sent out a packet */
9748 sctp_timer_validation(struct sctp_inpcb *inp,
9749 struct sctp_tcb *stcb,
9750 struct sctp_association *asoc)
9752 struct sctp_nets *net;
9754 /* Validate that a timer is running somewhere */
9755 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9756 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9757 /* Here is a timer */
9761 SCTP_TCB_LOCK_ASSERT(stcb);
9762 /* Gak, we did not have a timer somewhere */
9763 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9764 if (asoc->alternate) {
9765 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9767 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9773 sctp_chunk_output(struct sctp_inpcb *inp,
9774 struct sctp_tcb *stcb,
9777 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9783 * Ok this is the generic chunk service queue. we must do the
9785 * - See if there are retransmits pending, if so we must
9787 * - Service the stream queue that is next, moving any
9788 * message (note I must get a complete message i.e.
9789 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9791 * - Check to see if the cwnd/rwnd allows any output, if so we
9792 * go ahead and fomulate and send the low level chunks. Making sure
9793 * to combine any control in the control chunk queue also.
9795 struct sctp_association *asoc;
9796 struct sctp_nets *net;
9797 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0;
9798 unsigned int burst_cnt = 0;
9802 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9805 unsigned int tot_frs = 0;
9808 /* The Nagle algorithm is only applied when handling a send call. */
9809 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9810 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9818 SCTP_TCB_LOCK_ASSERT(stcb);
9820 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9822 if ((un_sent <= 0) &&
9823 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9824 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9825 (asoc->sent_queue_retran_cnt == 0)) {
9826 /* Nothing to do unless there is something to be sent left */
9830 * Do we have something to send, data or control AND a sack timer
9831 * running, if so piggy-back the sack.
9833 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9834 sctp_send_sack(stcb, so_locked);
9835 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9837 while (asoc->sent_queue_retran_cnt) {
9839 * Ok, it is retransmission time only, we send out only ONE
9840 * packet with a single call off to the retran code.
9842 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9844 * Special hook for handling cookiess discarded
9845 * by peer that carried data. Send cookie-ack only
9846 * and then the next call with get the retran's.
9848 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9850 &now, &now_filled, frag_point, so_locked);
9852 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9853 /* if its not from a HB then do it */
9855 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9861 * its from any other place, we don't allow retran
9862 * output (only control)
9867 /* Can't send anymore */
9869 * now lets push out control by calling med-level
9870 * output once. this assures that we WILL send HB's
9873 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9875 &now, &now_filled, frag_point, so_locked);
9876 #ifdef SCTP_AUDITING_ENABLED
9877 sctp_auditing(8, inp, stcb, NULL);
9879 sctp_timer_validation(inp, stcb, asoc);
9884 * The count was off.. retran is not happening so do
9885 * the normal retransmission.
9887 #ifdef SCTP_AUDITING_ENABLED
9888 sctp_auditing(9, inp, stcb, NULL);
9890 if (ret == SCTP_RETRAN_EXIT) {
9895 if (from_where == SCTP_OUTPUT_FROM_T3) {
9896 /* Only one transmission allowed out of a timeout */
9897 #ifdef SCTP_AUDITING_ENABLED
9898 sctp_auditing(10, inp, stcb, NULL);
9900 /* Push out any control */
9901 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
9902 &now, &now_filled, frag_point, so_locked);
9905 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
9906 /* Hit FR burst limit */
9909 if ((num_out == 0) && (ret == 0)) {
9910 /* No more retrans to send */
9914 #ifdef SCTP_AUDITING_ENABLED
9915 sctp_auditing(12, inp, stcb, NULL);
9917 /* Check for bad destinations, if they exist move chunks around. */
9918 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9919 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
9921 * if possible move things off of this address we
9922 * still may send below due to the dormant state but
9923 * we try to find an alternate address to send to
9924 * and if we have one we move all queued data on the
9925 * out wheel to this alternate address.
9927 if (net->ref_count > 1)
9928 sctp_move_chunks_from_net(stcb, net);
9931 * if ((asoc->sat_network) || (net->addr_is_local))
9932 * { burst_limit = asoc->max_burst *
9933 * SCTP_SAT_NETWORK_BURST_INCR; }
9935 if (asoc->max_burst > 0) {
9936 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
9937 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
9939 * JRS - Use the congestion
9940 * control given in the
9941 * congestion control module
9943 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
9944 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
9945 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
9947 SCTP_STAT_INCR(sctps_maxburstqueued);
9949 net->fast_retran_ip = 0;
9951 if (net->flight_size == 0) {
9953 * Should be decaying the
9965 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
9966 &reason_code, 0, from_where,
9967 &now, &now_filled, frag_point, so_locked);
9969 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
9970 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
9971 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
9973 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9974 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
9975 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
9979 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
9983 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9984 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
9986 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
9991 * When the Nagle algorithm is used, look at how
9992 * much is unsent, then if its smaller than an MTU
9993 * and we have data in flight we stop, except if we
9994 * are handling a fragmented user message.
9996 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
9997 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
9998 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
9999 (stcb->asoc.total_flight > 0) &&
10000 ((stcb->asoc.locked_on_sending == NULL) ||
10001 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10005 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10006 TAILQ_EMPTY(&asoc->send_queue) &&
10007 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10008 /* Nothing left to send */
10011 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10012 /* Nothing left to send */
10015 } while (num_out &&
10016 ((asoc->max_burst == 0) ||
10017 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10018 (burst_cnt < asoc->max_burst)));
10020 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10021 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10022 SCTP_STAT_INCR(sctps_maxburstqueued);
10023 asoc->burst_limit_applied = 1;
10024 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10025 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10028 asoc->burst_limit_applied = 0;
10031 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10032 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10034 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10038 * Now we need to clean up the control chunk chain if a ECNE is on
10039 * it. It must be marked as UNSENT again so next call will continue
10040 * to send it until such time that we get a CWR, to remove it.
10042 if (stcb->asoc.ecn_echo_cnt_onq)
10043 sctp_fix_ecn_echo(asoc);
10050 struct sctp_inpcb *inp,
10052 struct sockaddr *addr,
10053 struct mbuf *control,
10058 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10061 if (inp->sctp_socket == NULL) {
10062 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10065 return (sctp_sosend(inp->sctp_socket,
10067 (struct uio *)NULL,
10075 send_forward_tsn(struct sctp_tcb *stcb,
10076 struct sctp_association *asoc)
10078 struct sctp_tmit_chunk *chk;
10079 struct sctp_forward_tsn_chunk *fwdtsn;
10080 uint32_t advance_peer_ack_point;
10082 SCTP_TCB_LOCK_ASSERT(stcb);
10083 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10084 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10085 /* mark it to unsent */
10086 chk->sent = SCTP_DATAGRAM_UNSENT;
10087 chk->snd_count = 0;
10088 /* Do we correct its output location? */
10090 sctp_free_remote_addr(chk->whoTo);
10093 goto sctp_fill_in_rest;
10096 /* Ok if we reach here we must build one */
10097 sctp_alloc_a_chunk(stcb, chk);
10101 asoc->fwd_tsn_cnt++;
10102 chk->copy_by_ref = 0;
10103 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10104 chk->rec.chunk_id.can_take_data = 0;
10107 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
10108 if (chk->data == NULL) {
10109 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10112 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10113 chk->sent = SCTP_DATAGRAM_UNSENT;
10114 chk->snd_count = 0;
10115 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10116 asoc->ctrl_queue_cnt++;
10119 * Here we go through and fill out the part that deals with
10120 * stream/seq of the ones we skip.
10122 SCTP_BUF_LEN(chk->data) = 0;
10124 struct sctp_tmit_chunk *at, *tp1, *last;
10125 struct sctp_strseq *strseq;
10126 unsigned int cnt_of_space, i, ovh;
10127 unsigned int space_needed;
10128 unsigned int cnt_of_skipped = 0;
10130 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10131 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10132 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10133 /* no more to look at */
10136 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10137 /* We don't report these */
10142 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10143 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10145 cnt_of_space = M_TRAILINGSPACE(chk->data);
10147 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10148 ovh = SCTP_MIN_OVERHEAD;
10150 ovh = SCTP_MIN_V4_OVERHEAD;
10152 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10153 /* trim to a mtu size */
10154 cnt_of_space = asoc->smallest_mtu - ovh;
10156 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10157 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10158 0xff, 0, cnt_of_skipped,
10159 asoc->advanced_peer_ack_point);
10162 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10163 if (cnt_of_space < space_needed) {
10165 * ok we must trim down the chunk by lowering the
10166 * advance peer ack point.
10168 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10169 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10170 0xff, 0xff, cnt_of_space,
10173 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10174 cnt_of_skipped /= sizeof(struct sctp_strseq);
10176 * Go through and find the TSN that will be the one
10179 at = TAILQ_FIRST(&asoc->sent_queue);
10181 for (i = 0; i < cnt_of_skipped; i++) {
10182 tp1 = TAILQ_NEXT(at, sctp_next);
10189 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10190 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10191 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10192 asoc->advanced_peer_ack_point);
10196 * last now points to last one I can report, update
10200 advance_peer_ack_point = last->rec.data.TSN_seq;
10201 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10202 cnt_of_skipped * sizeof(struct sctp_strseq);
10204 chk->send_size = space_needed;
10205 /* Setup the chunk */
10206 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10207 fwdtsn->ch.chunk_length = htons(chk->send_size);
10208 fwdtsn->ch.chunk_flags = 0;
10209 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10210 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10211 SCTP_BUF_LEN(chk->data) = chk->send_size;
10214 * Move pointer to after the fwdtsn and transfer to the
10217 strseq = (struct sctp_strseq *)fwdtsn;
10219 * Now populate the strseq list. This is done blindly
10220 * without pulling out duplicate stream info. This is
10221 * inefficent but won't harm the process since the peer will
10222 * look at these in sequence and will thus release anything.
10223 * It could mean we exceed the PMTU and chop off some that
10224 * we could have included.. but this is unlikely (aka 1432/4
10225 * would mean 300+ stream seq's would have to be reported in
10226 * one FWD-TSN. With a bit of work we can later FIX this to
10227 * optimize and pull out duplcates.. but it does add more
10228 * overhead. So for now... not!
10230 at = TAILQ_FIRST(&asoc->sent_queue);
10231 for (i = 0; i < cnt_of_skipped; i++) {
10232 tp1 = TAILQ_NEXT(at, sctp_next);
10235 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10236 /* We don't report these */
10241 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10242 at->rec.data.fwd_tsn_cnt = 0;
10244 strseq->stream = ntohs(at->rec.data.stream_number);
10245 strseq->sequence = ntohs(at->rec.data.stream_seq);
10254 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10255 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10261 * Queue up a SACK or NR-SACK in the control queue.
10262 * We must first check to see if a SACK or NR-SACK is
10263 * somehow on the control queue.
10264 * If so, we will take and and remove the old one.
10266 struct sctp_association *asoc;
10267 struct sctp_tmit_chunk *chk, *a_chk;
10268 struct sctp_sack_chunk *sack;
10269 struct sctp_nr_sack_chunk *nr_sack;
10270 struct sctp_gap_ack_block *gap_descriptor;
10271 struct sack_track *selector;
10276 int limit_reached = 0;
10277 unsigned int i, siz, j;
10278 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10281 uint32_t highest_tsn;
10286 if ((stcb->asoc.sctp_nr_sack_on_off == 1) &&
10287 (stcb->asoc.peer_supports_nr_sack == 1)) {
10288 type = SCTP_NR_SELECTIVE_ACK;
10290 type = SCTP_SELECTIVE_ACK;
10293 asoc = &stcb->asoc;
10294 SCTP_TCB_LOCK_ASSERT(stcb);
10295 if (asoc->last_data_chunk_from == NULL) {
10296 /* Hmm we never received anything */
10299 sctp_slide_mapping_arrays(stcb);
10300 sctp_set_rwnd(stcb, asoc);
10301 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10302 if (chk->rec.chunk_id.id == type) {
10303 /* Hmm, found a sack already on queue, remove it */
10304 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10305 asoc->ctrl_queue_cnt--;
10308 sctp_m_freem(a_chk->data);
10309 a_chk->data = NULL;
10311 if (a_chk->whoTo) {
10312 sctp_free_remote_addr(a_chk->whoTo);
10313 a_chk->whoTo = NULL;
10318 if (a_chk == NULL) {
10319 sctp_alloc_a_chunk(stcb, a_chk);
10320 if (a_chk == NULL) {
10321 /* No memory so we drop the idea, and set a timer */
10322 if (stcb->asoc.delayed_ack) {
10323 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10324 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10325 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10326 stcb->sctp_ep, stcb, NULL);
10328 stcb->asoc.send_sack = 1;
10332 a_chk->copy_by_ref = 0;
10333 a_chk->rec.chunk_id.id = type;
10334 a_chk->rec.chunk_id.can_take_data = 1;
10336 /* Clear our pkt counts */
10337 asoc->data_pkts_seen = 0;
10339 a_chk->asoc = asoc;
10340 a_chk->snd_count = 0;
10341 a_chk->send_size = 0; /* fill in later */
10342 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10343 a_chk->whoTo = NULL;
10345 if ((asoc->numduptsns) ||
10346 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) {
10348 * Ok, we have some duplicates or the destination for the
10349 * sack is unreachable, lets see if we can select an
10350 * alternate than asoc->last_data_chunk_from
10352 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) &&
10353 (asoc->used_alt_onsack > asoc->numnets)) {
10354 /* We used an alt last time, don't this time */
10355 a_chk->whoTo = NULL;
10357 asoc->used_alt_onsack++;
10358 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10360 if (a_chk->whoTo == NULL) {
10361 /* Nope, no alternate */
10362 a_chk->whoTo = asoc->last_data_chunk_from;
10363 asoc->used_alt_onsack = 0;
10367 * No duplicates so we use the last place we received data
10370 asoc->used_alt_onsack = 0;
10371 a_chk->whoTo = asoc->last_data_chunk_from;
10373 if (a_chk->whoTo) {
10374 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10376 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10377 highest_tsn = asoc->highest_tsn_inside_map;
10379 highest_tsn = asoc->highest_tsn_inside_nr_map;
10381 if (highest_tsn == asoc->cumulative_tsn) {
10383 if (type == SCTP_SELECTIVE_ACK) {
10384 space_req = sizeof(struct sctp_sack_chunk);
10386 space_req = sizeof(struct sctp_nr_sack_chunk);
10389 /* gaps get a cluster */
10390 space_req = MCLBYTES;
10392 /* Ok now lets formulate a MBUF with our sack */
10393 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_DONTWAIT, 1, MT_DATA);
10394 if ((a_chk->data == NULL) ||
10395 (a_chk->whoTo == NULL)) {
10396 /* rats, no mbuf memory */
10398 /* was a problem with the destination */
10399 sctp_m_freem(a_chk->data);
10400 a_chk->data = NULL;
10402 sctp_free_a_chunk(stcb, a_chk, so_locked);
10403 /* sa_ignore NO_NULL_CHK */
10404 if (stcb->asoc.delayed_ack) {
10405 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10406 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
10407 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10408 stcb->sctp_ep, stcb, NULL);
10410 stcb->asoc.send_sack = 1;
10414 /* ok, lets go through and fill it in */
10415 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10416 space = M_TRAILINGSPACE(a_chk->data);
10417 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10418 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10420 limit = mtod(a_chk->data, caddr_t);
10425 if ((asoc->sctp_cmt_on_off > 0) &&
10426 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10428 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10429 * received, then set high bit to 1, else 0. Reset
10432 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10433 asoc->cmt_dac_pkts_rcvd = 0;
10435 #ifdef SCTP_ASOCLOG_OF_TSNS
10436 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10437 stcb->asoc.cumack_log_atsnt++;
10438 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10439 stcb->asoc.cumack_log_atsnt = 0;
10442 /* reset the readers interpretation */
10443 stcb->freed_by_sorcv_sincelast = 0;
10445 if (type == SCTP_SELECTIVE_ACK) {
10446 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10448 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10449 if (highest_tsn > asoc->mapping_array_base_tsn) {
10450 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10452 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10456 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10457 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10458 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10459 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10461 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10465 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10468 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10470 if (((type == SCTP_SELECTIVE_ACK) &&
10471 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10472 ((type == SCTP_NR_SELECTIVE_ACK) &&
10473 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10474 /* we have a gap .. maybe */
10475 for (i = 0; i < siz; i++) {
10476 tsn_map = asoc->mapping_array[i];
10477 if (type == SCTP_SELECTIVE_ACK) {
10478 tsn_map |= asoc->nr_mapping_array[i];
10482 * Clear all bits corresponding to TSNs
10483 * smaller or equal to the cumulative TSN.
10485 tsn_map &= (~0 << (1 - offset));
10487 selector = &sack_array[tsn_map];
10488 if (mergeable && selector->right_edge) {
10490 * Backup, left and right edges were ok to
10496 if (selector->num_entries == 0)
10499 for (j = 0; j < selector->num_entries; j++) {
10500 if (mergeable && selector->right_edge) {
10502 * do a merge by NOT setting
10508 * no merge, set the left
10512 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10514 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10517 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10523 if (selector->left_edge) {
10527 if (limit_reached) {
10528 /* Reached the limit stop */
10534 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10535 (limit_reached == 0)) {
10539 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10540 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10542 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10545 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10548 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10550 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10551 /* we have a gap .. maybe */
10552 for (i = 0; i < siz; i++) {
10553 tsn_map = asoc->nr_mapping_array[i];
10556 * Clear all bits corresponding to
10557 * TSNs smaller or equal to the
10560 tsn_map &= (~0 << (1 - offset));
10562 selector = &sack_array[tsn_map];
10563 if (mergeable && selector->right_edge) {
10565 * Backup, left and right edges were
10568 num_nr_gap_blocks--;
10571 if (selector->num_entries == 0)
10574 for (j = 0; j < selector->num_entries; j++) {
10575 if (mergeable && selector->right_edge) {
10577 * do a merge by NOT
10584 * no merge, set the
10588 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10590 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10591 num_nr_gap_blocks++;
10593 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10599 if (selector->left_edge) {
10603 if (limit_reached) {
10604 /* Reached the limit stop */
10611 /* now we must add any dups we are going to report. */
10612 if ((limit_reached == 0) && (asoc->numduptsns)) {
10613 dup = (uint32_t *) gap_descriptor;
10614 for (i = 0; i < asoc->numduptsns; i++) {
10615 *dup = htonl(asoc->dup_tsns[i]);
10618 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10623 asoc->numduptsns = 0;
10626 * now that the chunk is prepared queue it to the control chunk
10629 if (type == SCTP_SELECTIVE_ACK) {
10630 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10631 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10632 num_dups * sizeof(int32_t);
10633 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10634 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10635 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10636 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10637 sack->sack.num_dup_tsns = htons(num_dups);
10638 sack->ch.chunk_type = type;
10639 sack->ch.chunk_flags = flags;
10640 sack->ch.chunk_length = htons(a_chk->send_size);
10642 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10643 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10644 num_dups * sizeof(int32_t);
10645 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10646 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10647 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10648 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10649 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10650 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10651 nr_sack->nr_sack.reserved = 0;
10652 nr_sack->ch.chunk_type = type;
10653 nr_sack->ch.chunk_flags = flags;
10654 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10656 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10657 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10658 asoc->ctrl_queue_cnt++;
10659 asoc->send_sack = 0;
10660 SCTP_STAT_INCR(sctps_sendsacks);
10665 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10666 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10671 struct mbuf *m_abort, *m, *m_last;
10672 struct mbuf *m_out, *m_end = NULL;
10673 struct sctp_abort_chunk *abort;
10674 struct sctp_auth_chunk *auth = NULL;
10675 struct sctp_nets *net;
10677 uint32_t auth_offset = 0;
10678 uint16_t cause_len, chunk_len, padding_len;
10680 SCTP_TCB_LOCK_ASSERT(stcb);
10682 * Add an AUTH chunk, if chunk requires it and save the offset into
10683 * the chain for AUTH
10685 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10686 stcb->asoc.peer_auth_chunks)) {
10687 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10688 stcb, SCTP_ABORT_ASSOCIATION);
10689 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10693 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
10694 if (m_abort == NULL) {
10696 sctp_m_freem(m_out);
10699 sctp_m_freem(operr);
10703 /* link in any error */
10704 SCTP_BUF_NEXT(m_abort) = operr;
10707 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10708 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10709 if (SCTP_BUF_NEXT(m) == NULL) {
10713 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10714 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10715 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10716 if (m_out == NULL) {
10717 /* NO Auth chunk prepended, so reserve space in front */
10718 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10721 /* Put AUTH chunk at the front of the chain */
10722 SCTP_BUF_NEXT(m_end) = m_abort;
10724 if (stcb->asoc.alternate) {
10725 net = stcb->asoc.alternate;
10727 net = stcb->asoc.primary_destination;
10729 /* Fill in the ABORT chunk header. */
10730 abort = mtod(m_abort, struct sctp_abort_chunk *);
10731 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10732 if (stcb->asoc.peer_vtag == 0) {
10733 /* This happens iff the assoc is in COOKIE-WAIT state. */
10734 vtag = stcb->asoc.my_vtag;
10735 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10737 vtag = stcb->asoc.peer_vtag;
10738 abort->ch.chunk_flags = 0;
10740 abort->ch.chunk_length = htons(chunk_len);
10741 /* Add padding, if necessary. */
10742 if (padding_len > 0) {
10743 if ((m_last == NULL) || sctp_add_pad_tombuf(m_last, padding_len)) {
10744 sctp_m_freem(m_out);
10748 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10749 (struct sockaddr *)&net->ro._l_addr,
10750 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10751 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10752 stcb->asoc.primary_destination->port, NULL,
10755 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10759 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10760 struct sctp_nets *net,
10763 /* formulate and SEND a SHUTDOWN-COMPLETE */
10764 struct mbuf *m_shutdown_comp;
10765 struct sctp_shutdown_complete_chunk *shutdown_complete;
10769 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
10770 if (m_shutdown_comp == NULL) {
10774 if (reflect_vtag) {
10775 flags = SCTP_HAD_NO_TCB;
10776 vtag = stcb->asoc.my_vtag;
10779 vtag = stcb->asoc.peer_vtag;
10781 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10782 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10783 shutdown_complete->ch.chunk_flags = flags;
10784 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10785 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10786 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10787 (struct sockaddr *)&net->ro._l_addr,
10788 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10789 stcb->sctp_ep->sctp_lport, stcb->rport,
10793 SCTP_SO_NOT_LOCKED);
10794 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10799 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10800 struct sctphdr *sh, uint32_t vtag,
10801 uint8_t type, struct mbuf *cause,
10802 uint8_t use_mflowid, uint32_t mflowid,
10803 uint32_t vrf_id, uint16_t port)
10805 struct mbuf *o_pak;
10807 struct sctphdr *shout;
10808 struct sctp_chunkhdr *ch;
10809 struct udphdr *udp;
10810 int len, cause_len, padding_len;
10812 #if defined(INET) || defined(INET6)
10817 struct sockaddr_in *src_sin, *dst_sin;
10822 struct sockaddr_in6 *src_sin6, *dst_sin6;
10823 struct ip6_hdr *ip6;
10827 /* Compute the length of the cause and add final padding. */
10829 if (cause != NULL) {
10830 struct mbuf *m_at, *m_last = NULL;
10832 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10833 if (SCTP_BUF_NEXT(m_at) == NULL)
10835 cause_len += SCTP_BUF_LEN(m_at);
10837 padding_len = cause_len % 4;
10838 if (padding_len != 0) {
10839 padding_len = 4 - padding_len;
10841 if (padding_len != 0) {
10842 if (sctp_add_pad_tombuf(m_last, padding_len)) {
10843 sctp_m_freem(cause);
10850 /* Get an mbuf for the header. */
10851 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
10852 switch (dst->sa_family) {
10855 len += sizeof(struct ip);
10860 len += sizeof(struct ip6_hdr);
10867 len += sizeof(struct udphdr);
10869 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
10870 if (mout == NULL) {
10872 sctp_m_freem(cause);
10876 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10877 SCTP_BUF_LEN(mout) = len;
10878 SCTP_BUF_NEXT(mout) = cause;
10879 if (use_mflowid != 0) {
10880 mout->m_pkthdr.flowid = mflowid;
10881 mout->m_flags |= M_FLOWID;
10889 switch (dst->sa_family) {
10892 src_sin = (struct sockaddr_in *)src;
10893 dst_sin = (struct sockaddr_in *)dst;
10894 ip = mtod(mout, struct ip *);
10895 ip->ip_v = IPVERSION;
10896 ip->ip_hl = (sizeof(struct ip) >> 2);
10898 ip->ip_id = ip_newid();
10900 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
10902 ip->ip_p = IPPROTO_UDP;
10904 ip->ip_p = IPPROTO_SCTP;
10906 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
10907 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
10909 len = sizeof(struct ip);
10910 shout = (struct sctphdr *)((caddr_t)ip + len);
10915 src_sin6 = (struct sockaddr_in6 *)src;
10916 dst_sin6 = (struct sockaddr_in6 *)dst;
10917 ip6 = mtod(mout, struct ip6_hdr *);
10918 ip6->ip6_flow = htonl(0x60000000);
10919 if (V_ip6_auto_flowlabel) {
10920 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
10922 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
10924 ip6->ip6_nxt = IPPROTO_UDP;
10926 ip6->ip6_nxt = IPPROTO_SCTP;
10928 ip6->ip6_src = dst_sin6->sin6_addr;
10929 ip6->ip6_dst = src_sin6->sin6_addr;
10930 len = sizeof(struct ip6_hdr);
10931 shout = (struct sctphdr *)((caddr_t)ip6 + len);
10936 shout = mtod(mout, struct sctphdr *);
10940 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
10941 sctp_m_freem(mout);
10944 udp = (struct udphdr *)shout;
10945 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
10946 udp->uh_dport = port;
10948 udp->uh_ulen = htons(sizeof(struct udphdr) +
10949 sizeof(struct sctphdr) +
10950 sizeof(struct sctp_chunkhdr) +
10951 cause_len + padding_len);
10952 len += sizeof(struct udphdr);
10953 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
10957 shout->src_port = sh->dest_port;
10958 shout->dest_port = sh->src_port;
10959 shout->checksum = 0;
10961 shout->v_tag = htonl(vtag);
10963 shout->v_tag = sh->v_tag;
10965 len += sizeof(struct sctphdr);
10966 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
10967 ch->chunk_type = type;
10969 ch->chunk_flags = 0;
10971 ch->chunk_flags = SCTP_HAD_NO_TCB;
10973 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
10974 len += sizeof(struct sctp_chunkhdr);
10975 len += cause_len + padding_len;
10977 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
10978 sctp_m_freem(mout);
10981 SCTP_ATTACH_CHAIN(o_pak, mout, len);
10982 switch (dst->sa_family) {
10987 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
10994 #if defined(SCTP_WITH_NO_CSUM)
10995 SCTP_STAT_INCR(sctps_sendnocrc);
10997 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
10998 SCTP_STAT_INCR(sctps_sendswcrc);
11001 SCTP_ENABLE_UDP_CSUM(o_pak);
11004 #if defined(SCTP_WITH_NO_CSUM)
11005 SCTP_STAT_INCR(sctps_sendnocrc);
11007 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11008 mout->m_pkthdr.csum_data = 0;
11009 SCTP_STAT_INCR(sctps_sendhwcrc);
11012 #ifdef SCTP_PACKET_LOGGING
11013 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11014 sctp_packet_log(o_pak);
11017 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11022 ip6->ip6_plen = len - sizeof(struct ip6_hdr);
11024 #if defined(SCTP_WITH_NO_CSUM)
11025 SCTP_STAT_INCR(sctps_sendnocrc);
11027 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11028 SCTP_STAT_INCR(sctps_sendswcrc);
11030 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11031 udp->uh_sum = 0xffff;
11034 #if defined(SCTP_WITH_NO_CSUM)
11035 SCTP_STAT_INCR(sctps_sendnocrc);
11037 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11038 mout->m_pkthdr.csum_data = 0;
11039 SCTP_STAT_INCR(sctps_sendhwcrc);
11042 #ifdef SCTP_PACKET_LOGGING
11043 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11044 sctp_packet_log(o_pak);
11047 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11051 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11053 sctp_m_freem(mout);
11054 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11057 SCTP_STAT_INCR(sctps_sendpackets);
11058 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11059 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11064 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11065 struct sctphdr *sh,
11066 uint8_t use_mflowid, uint32_t mflowid,
11067 uint32_t vrf_id, uint16_t port)
11069 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11070 use_mflowid, mflowid,
11075 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11076 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11081 struct sctp_tmit_chunk *chk;
11082 struct sctp_heartbeat_chunk *hb;
11083 struct timeval now;
11085 SCTP_TCB_LOCK_ASSERT(stcb);
11089 (void)SCTP_GETTIME_TIMEVAL(&now);
11090 switch (net->ro._l_addr.sa.sa_family) {
11102 sctp_alloc_a_chunk(stcb, chk);
11104 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11107 chk->copy_by_ref = 0;
11108 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11109 chk->rec.chunk_id.can_take_data = 1;
11110 chk->asoc = &stcb->asoc;
11111 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11113 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11114 if (chk->data == NULL) {
11115 sctp_free_a_chunk(stcb, chk, so_locked);
11118 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11119 SCTP_BUF_LEN(chk->data) = chk->send_size;
11120 chk->sent = SCTP_DATAGRAM_UNSENT;
11121 chk->snd_count = 0;
11123 atomic_add_int(&chk->whoTo->ref_count, 1);
11124 /* Now we have a mbuf that we can fill in with the details */
11125 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11126 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11127 /* fill out chunk header */
11128 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11129 hb->ch.chunk_flags = 0;
11130 hb->ch.chunk_length = htons(chk->send_size);
11131 /* Fill out hb parameter */
11132 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11133 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11134 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11135 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11136 /* Did our user request this one, put it in */
11137 hb->heartbeat.hb_info.addr_family = net->ro._l_addr.sa.sa_family;
11138 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11139 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11141 * we only take from the entropy pool if the address is not
11144 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11145 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11147 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11148 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11150 switch (net->ro._l_addr.sa.sa_family) {
11153 memcpy(hb->heartbeat.hb_info.address,
11154 &net->ro._l_addr.sin.sin_addr,
11155 sizeof(net->ro._l_addr.sin.sin_addr));
11160 memcpy(hb->heartbeat.hb_info.address,
11161 &net->ro._l_addr.sin6.sin6_addr,
11162 sizeof(net->ro._l_addr.sin6.sin6_addr));
11169 net->hb_responded = 0;
11170 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11171 stcb->asoc.ctrl_queue_cnt++;
11172 SCTP_STAT_INCR(sctps_sendheartbeat);
11177 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11180 struct sctp_association *asoc;
11181 struct sctp_ecne_chunk *ecne;
11182 struct sctp_tmit_chunk *chk;
11187 asoc = &stcb->asoc;
11188 SCTP_TCB_LOCK_ASSERT(stcb);
11189 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11190 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11191 /* found a previous ECN_ECHO update it if needed */
11192 uint32_t cnt, ctsn;
11194 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11195 ctsn = ntohl(ecne->tsn);
11196 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11197 ecne->tsn = htonl(high_tsn);
11198 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11200 cnt = ntohl(ecne->num_pkts_since_cwr);
11202 ecne->num_pkts_since_cwr = htonl(cnt);
11206 /* nope could not find one to update so we must build one */
11207 sctp_alloc_a_chunk(stcb, chk);
11211 chk->copy_by_ref = 0;
11212 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11213 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11214 chk->rec.chunk_id.can_take_data = 0;
11215 chk->asoc = &stcb->asoc;
11216 chk->send_size = sizeof(struct sctp_ecne_chunk);
11217 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11218 if (chk->data == NULL) {
11219 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11222 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11223 SCTP_BUF_LEN(chk->data) = chk->send_size;
11224 chk->sent = SCTP_DATAGRAM_UNSENT;
11225 chk->snd_count = 0;
11227 atomic_add_int(&chk->whoTo->ref_count, 1);
11229 stcb->asoc.ecn_echo_cnt_onq++;
11230 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11231 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11232 ecne->ch.chunk_flags = 0;
11233 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11234 ecne->tsn = htonl(high_tsn);
11235 ecne->num_pkts_since_cwr = htonl(1);
11236 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11237 asoc->ctrl_queue_cnt++;
11241 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11242 struct mbuf *m, int len, int iphlen, int bad_crc)
11244 struct sctp_association *asoc;
11245 struct sctp_pktdrop_chunk *drp;
11246 struct sctp_tmit_chunk *chk;
11252 struct sctp_chunkhdr *ch, chunk_buf;
11253 unsigned int chk_length;
11258 asoc = &stcb->asoc;
11259 SCTP_TCB_LOCK_ASSERT(stcb);
11260 if (asoc->peer_supports_pktdrop == 0) {
11262 * peer must declare support before I send one.
11266 if (stcb->sctp_socket == NULL) {
11269 sctp_alloc_a_chunk(stcb, chk);
11273 chk->copy_by_ref = 0;
11275 chk->send_size = len;
11276 /* Validate that we do not have an ABORT in here. */
11277 offset = iphlen + sizeof(struct sctphdr);
11278 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11279 sizeof(*ch), (uint8_t *) & chunk_buf);
11280 while (ch != NULL) {
11281 chk_length = ntohs(ch->chunk_length);
11282 if (chk_length < sizeof(*ch)) {
11283 /* break to abort land */
11286 switch (ch->chunk_type) {
11287 case SCTP_PACKET_DROPPED:
11288 case SCTP_ABORT_ASSOCIATION:
11289 case SCTP_INITIATION_ACK:
11291 * We don't respond with an PKT-DROP to an ABORT
11292 * or PKT-DROP. We also do not respond to an
11293 * INIT-ACK, because we can't know if the initiation
11294 * tag is correct or not.
11296 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11301 offset += SCTP_SIZE32(chk_length);
11302 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11303 sizeof(*ch), (uint8_t *) & chunk_buf);
11306 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11307 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11309 * only send 1 mtu worth, trim off the excess on the end.
11312 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11315 chk->asoc = &stcb->asoc;
11316 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11317 if (chk->data == NULL) {
11319 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11322 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11323 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11325 sctp_m_freem(chk->data);
11329 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11330 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11331 chk->book_size_scale = 0;
11333 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11334 drp->trunc_len = htons(fullsz);
11336 * Len is already adjusted to size minus overhead above take
11337 * out the pkt_drop chunk itself from it.
11339 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11340 len = chk->send_size;
11342 /* no truncation needed */
11343 drp->ch.chunk_flags = 0;
11344 drp->trunc_len = htons(0);
11347 drp->ch.chunk_flags |= SCTP_BADCRC;
11349 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11350 SCTP_BUF_LEN(chk->data) = chk->send_size;
11351 chk->sent = SCTP_DATAGRAM_UNSENT;
11352 chk->snd_count = 0;
11354 /* we should hit here */
11356 atomic_add_int(&chk->whoTo->ref_count, 1);
11360 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11361 chk->rec.chunk_id.can_take_data = 1;
11362 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11363 drp->ch.chunk_length = htons(chk->send_size);
11364 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11368 drp->bottle_bw = htonl(spc);
11369 if (asoc->my_rwnd) {
11370 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11371 asoc->size_on_all_streams +
11372 asoc->my_rwnd_control_len +
11373 stcb->sctp_socket->so_rcv.sb_cc);
11376 * If my rwnd is 0, possibly from mbuf depletion as well as
11377 * space used, tell the peer there is NO space aka onq == bw
11379 drp->current_onq = htonl(spc);
11383 m_copydata(m, iphlen, len, (caddr_t)datap);
11384 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11385 asoc->ctrl_queue_cnt++;
11389 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11391 struct sctp_association *asoc;
11392 struct sctp_cwr_chunk *cwr;
11393 struct sctp_tmit_chunk *chk;
11395 SCTP_TCB_LOCK_ASSERT(stcb);
11399 asoc = &stcb->asoc;
11400 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11401 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11403 * found a previous CWR queued to same destination
11404 * update it if needed
11408 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11409 ctsn = ntohl(cwr->tsn);
11410 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11411 cwr->tsn = htonl(high_tsn);
11413 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11414 /* Make sure override is carried */
11415 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11420 sctp_alloc_a_chunk(stcb, chk);
11424 chk->copy_by_ref = 0;
11425 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11426 chk->rec.chunk_id.can_take_data = 1;
11427 chk->asoc = &stcb->asoc;
11428 chk->send_size = sizeof(struct sctp_cwr_chunk);
11429 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11430 if (chk->data == NULL) {
11431 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11434 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11435 SCTP_BUF_LEN(chk->data) = chk->send_size;
11436 chk->sent = SCTP_DATAGRAM_UNSENT;
11437 chk->snd_count = 0;
11439 atomic_add_int(&chk->whoTo->ref_count, 1);
11440 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11441 cwr->ch.chunk_type = SCTP_ECN_CWR;
11442 cwr->ch.chunk_flags = override;
11443 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11444 cwr->tsn = htonl(high_tsn);
11445 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11446 asoc->ctrl_queue_cnt++;
11450 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11451 int number_entries, uint16_t * list,
11452 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11454 uint16_t len, old_len, i;
11455 struct sctp_stream_reset_out_request *req_out;
11456 struct sctp_chunkhdr *ch;
11458 ch = mtod(chk->data, struct sctp_chunkhdr *);
11459 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11461 /* get to new offset for the param. */
11462 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11463 /* now how long will this param be? */
11464 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11465 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11466 req_out->ph.param_length = htons(len);
11467 req_out->request_seq = htonl(seq);
11468 req_out->response_seq = htonl(resp_seq);
11469 req_out->send_reset_at_tsn = htonl(last_sent);
11470 if (number_entries) {
11471 for (i = 0; i < number_entries; i++) {
11472 req_out->list_of_streams[i] = htons(list[i]);
11475 if (SCTP_SIZE32(len) > len) {
11477 * Need to worry about the pad we may end up adding to the
11478 * end. This is easy since the struct is either aligned to 4
11479 * bytes or 2 bytes off.
11481 req_out->list_of_streams[number_entries] = 0;
11483 /* now fix the chunk length */
11484 ch->chunk_length = htons(len + old_len);
11485 chk->book_size = len + old_len;
11486 chk->book_size_scale = 0;
11487 chk->send_size = SCTP_SIZE32(chk->book_size);
11488 SCTP_BUF_LEN(chk->data) = chk->send_size;
11493 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11494 int number_entries, uint16_t * list,
11497 uint16_t len, old_len, i;
11498 struct sctp_stream_reset_in_request *req_in;
11499 struct sctp_chunkhdr *ch;
11501 ch = mtod(chk->data, struct sctp_chunkhdr *);
11502 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11504 /* get to new offset for the param. */
11505 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11506 /* now how long will this param be? */
11507 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11508 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11509 req_in->ph.param_length = htons(len);
11510 req_in->request_seq = htonl(seq);
11511 if (number_entries) {
11512 for (i = 0; i < number_entries; i++) {
11513 req_in->list_of_streams[i] = htons(list[i]);
11516 if (SCTP_SIZE32(len) > len) {
11518 * Need to worry about the pad we may end up adding to the
11519 * end. This is easy since the struct is either aligned to 4
11520 * bytes or 2 bytes off.
11522 req_in->list_of_streams[number_entries] = 0;
11524 /* now fix the chunk length */
11525 ch->chunk_length = htons(len + old_len);
11526 chk->book_size = len + old_len;
11527 chk->book_size_scale = 0;
11528 chk->send_size = SCTP_SIZE32(chk->book_size);
11529 SCTP_BUF_LEN(chk->data) = chk->send_size;
11534 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11537 uint16_t len, old_len;
11538 struct sctp_stream_reset_tsn_request *req_tsn;
11539 struct sctp_chunkhdr *ch;
11541 ch = mtod(chk->data, struct sctp_chunkhdr *);
11542 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11544 /* get to new offset for the param. */
11545 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11546 /* now how long will this param be? */
11547 len = sizeof(struct sctp_stream_reset_tsn_request);
11548 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11549 req_tsn->ph.param_length = htons(len);
11550 req_tsn->request_seq = htonl(seq);
11552 /* now fix the chunk length */
11553 ch->chunk_length = htons(len + old_len);
11554 chk->send_size = len + old_len;
11555 chk->book_size = SCTP_SIZE32(chk->send_size);
11556 chk->book_size_scale = 0;
11557 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11562 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11563 uint32_t resp_seq, uint32_t result)
11565 uint16_t len, old_len;
11566 struct sctp_stream_reset_response *resp;
11567 struct sctp_chunkhdr *ch;
11569 ch = mtod(chk->data, struct sctp_chunkhdr *);
11570 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11572 /* get to new offset for the param. */
11573 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11574 /* now how long will this param be? */
11575 len = sizeof(struct sctp_stream_reset_response);
11576 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11577 resp->ph.param_length = htons(len);
11578 resp->response_seq = htonl(resp_seq);
11579 resp->result = ntohl(result);
11581 /* now fix the chunk length */
11582 ch->chunk_length = htons(len + old_len);
11583 chk->book_size = len + old_len;
11584 chk->book_size_scale = 0;
11585 chk->send_size = SCTP_SIZE32(chk->book_size);
11586 SCTP_BUF_LEN(chk->data) = chk->send_size;
11591 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11592 uint32_t resp_seq, uint32_t result,
11593 uint32_t send_una, uint32_t recv_next)
11595 uint16_t len, old_len;
11596 struct sctp_stream_reset_response_tsn *resp;
11597 struct sctp_chunkhdr *ch;
11599 ch = mtod(chk->data, struct sctp_chunkhdr *);
11600 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11602 /* get to new offset for the param. */
11603 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11604 /* now how long will this param be? */
11605 len = sizeof(struct sctp_stream_reset_response_tsn);
11606 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11607 resp->ph.param_length = htons(len);
11608 resp->response_seq = htonl(resp_seq);
11609 resp->result = htonl(result);
11610 resp->senders_next_tsn = htonl(send_una);
11611 resp->receivers_next_tsn = htonl(recv_next);
11613 /* now fix the chunk length */
11614 ch->chunk_length = htons(len + old_len);
11615 chk->book_size = len + old_len;
11616 chk->send_size = SCTP_SIZE32(chk->book_size);
11617 chk->book_size_scale = 0;
11618 SCTP_BUF_LEN(chk->data) = chk->send_size;
11623 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11627 uint16_t len, old_len;
11628 struct sctp_chunkhdr *ch;
11629 struct sctp_stream_reset_add_strm *addstr;
11631 ch = mtod(chk->data, struct sctp_chunkhdr *);
11632 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11634 /* get to new offset for the param. */
11635 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11636 /* now how long will this param be? */
11637 len = sizeof(struct sctp_stream_reset_add_strm);
11640 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11641 addstr->ph.param_length = htons(len);
11642 addstr->request_seq = htonl(seq);
11643 addstr->number_of_streams = htons(adding);
11644 addstr->reserved = 0;
11646 /* now fix the chunk length */
11647 ch->chunk_length = htons(len + old_len);
11648 chk->send_size = len + old_len;
11649 chk->book_size = SCTP_SIZE32(chk->send_size);
11650 chk->book_size_scale = 0;
11651 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11656 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11660 uint16_t len, old_len;
11661 struct sctp_chunkhdr *ch;
11662 struct sctp_stream_reset_add_strm *addstr;
11664 ch = mtod(chk->data, struct sctp_chunkhdr *);
11665 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11667 /* get to new offset for the param. */
11668 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11669 /* now how long will this param be? */
11670 len = sizeof(struct sctp_stream_reset_add_strm);
11672 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11673 addstr->ph.param_length = htons(len);
11674 addstr->request_seq = htonl(seq);
11675 addstr->number_of_streams = htons(adding);
11676 addstr->reserved = 0;
11678 /* now fix the chunk length */
11679 ch->chunk_length = htons(len + old_len);
11680 chk->send_size = len + old_len;
11681 chk->book_size = SCTP_SIZE32(chk->send_size);
11682 chk->book_size_scale = 0;
11683 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11688 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11689 int number_entries, uint16_t * list,
11690 uint8_t send_out_req,
11691 uint8_t send_in_req,
11692 uint8_t send_tsn_req,
11693 uint8_t add_stream,
11695 uint16_t adding_i, uint8_t peer_asked)
11698 struct sctp_association *asoc;
11699 struct sctp_tmit_chunk *chk;
11700 struct sctp_chunkhdr *ch;
11703 asoc = &stcb->asoc;
11704 if (asoc->stream_reset_outstanding) {
11706 * Already one pending, must get ACK back to clear the flag.
11708 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11711 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11712 (add_stream == 0)) {
11713 /* nothing to do */
11714 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11717 if (send_tsn_req && (send_out_req || send_in_req)) {
11718 /* error, can't do that */
11719 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11722 sctp_alloc_a_chunk(stcb, chk);
11724 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11727 chk->copy_by_ref = 0;
11728 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11729 chk->rec.chunk_id.can_take_data = 0;
11730 chk->asoc = &stcb->asoc;
11731 chk->book_size = sizeof(struct sctp_chunkhdr);
11732 chk->send_size = SCTP_SIZE32(chk->book_size);
11733 chk->book_size_scale = 0;
11735 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11736 if (chk->data == NULL) {
11737 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11738 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11741 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11743 /* setup chunk parameters */
11744 chk->sent = SCTP_DATAGRAM_UNSENT;
11745 chk->snd_count = 0;
11746 if (stcb->asoc.alternate) {
11747 chk->whoTo = stcb->asoc.alternate;
11749 chk->whoTo = stcb->asoc.primary_destination;
11751 atomic_add_int(&chk->whoTo->ref_count, 1);
11752 ch = mtod(chk->data, struct sctp_chunkhdr *);
11753 ch->chunk_type = SCTP_STREAM_RESET;
11754 ch->chunk_flags = 0;
11755 ch->chunk_length = htons(chk->book_size);
11756 SCTP_BUF_LEN(chk->data) = chk->send_size;
11758 seq = stcb->asoc.str_reset_seq_out;
11759 if (send_out_req) {
11760 sctp_add_stream_reset_out(chk, number_entries, list,
11761 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
11762 asoc->stream_reset_out_is_outstanding = 1;
11764 asoc->stream_reset_outstanding++;
11766 if ((add_stream & 1) &&
11767 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
11768 /* Need to allocate more */
11769 struct sctp_stream_out *oldstream;
11770 struct sctp_stream_queue_pending *sp, *nsp;
11773 oldstream = stcb->asoc.strmout;
11774 /* get some more */
11775 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
11776 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)),
11778 if (stcb->asoc.strmout == NULL) {
11781 stcb->asoc.strmout = oldstream;
11782 /* Turn off the bit */
11783 x = add_stream & 0xfe;
11788 * Ok now we proceed with copying the old out stuff and
11789 * initializing the new stuff.
11791 SCTP_TCB_SEND_LOCK(stcb);
11792 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
11793 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11794 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11795 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
11796 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
11797 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
11798 stcb->asoc.strmout[i].stream_no = i;
11799 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
11800 /* now anything on those queues? */
11801 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
11802 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
11803 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
11805 /* Now move assoc pointers too */
11806 if (stcb->asoc.last_out_stream == &oldstream[i]) {
11807 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
11809 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
11810 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
11813 /* now the new streams */
11814 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
11815 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
11816 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11817 stcb->asoc.strmout[i].chunks_on_queues = 0;
11818 stcb->asoc.strmout[i].next_sequence_send = 0x0;
11819 stcb->asoc.strmout[i].stream_no = i;
11820 stcb->asoc.strmout[i].last_msg_incomplete = 0;
11821 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
11823 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
11824 SCTP_FREE(oldstream, SCTP_M_STRMO);
11825 SCTP_TCB_SEND_UNLOCK(stcb);
11828 if ((add_stream & 1) && (adding_o > 0)) {
11829 asoc->strm_pending_add_size = adding_o;
11830 asoc->peer_req_out = peer_asked;
11831 sctp_add_an_out_stream(chk, seq, adding_o);
11833 asoc->stream_reset_outstanding++;
11835 if ((add_stream & 2) && (adding_i > 0)) {
11836 sctp_add_an_in_stream(chk, seq, adding_i);
11838 asoc->stream_reset_outstanding++;
11841 sctp_add_stream_reset_in(chk, number_entries, list, seq);
11843 asoc->stream_reset_outstanding++;
11845 if (send_tsn_req) {
11846 sctp_add_stream_reset_tsn(chk, seq);
11847 asoc->stream_reset_outstanding++;
11849 asoc->str_reset = chk;
11850 /* insert the chunk for sending */
11851 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11854 asoc->ctrl_queue_cnt++;
11855 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11860 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
11861 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
11862 uint8_t use_mflowid, uint32_t mflowid,
11863 uint32_t vrf_id, uint16_t port)
11865 /* Don't respond to an ABORT with an ABORT. */
11866 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
11868 sctp_m_freem(cause);
11871 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
11872 use_mflowid, mflowid,
11878 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
11879 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
11880 uint8_t use_mflowid, uint32_t mflowid,
11881 uint32_t vrf_id, uint16_t port)
11883 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
11884 use_mflowid, mflowid,
11889 static struct mbuf *
11890 sctp_copy_resume(struct uio *uio,
11892 int user_marks_eor,
11895 struct mbuf **new_tail)
11899 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
11900 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
11902 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11905 *sndout = m_length(m, NULL);
11906 *new_tail = m_last(m);
11912 sctp_copy_one(struct sctp_stream_queue_pending *sp,
11919 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
11921 if (sp->data == NULL) {
11922 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11925 sp->tail_mbuf = m_last(sp->data);
11931 static struct sctp_stream_queue_pending *
11932 sctp_copy_it_in(struct sctp_tcb *stcb,
11933 struct sctp_association *asoc,
11934 struct sctp_sndrcvinfo *srcv,
11936 struct sctp_nets *net,
11938 int user_marks_eor,
11942 * This routine must be very careful in its work. Protocol
11943 * processing is up and running so care must be taken to spl...()
11944 * when you need to do something that may effect the stcb/asoc. The
11945 * sb is locked however. When data is copied the protocol processing
11946 * should be enabled since this is a slower operation...
11948 struct sctp_stream_queue_pending *sp = NULL;
11952 /* Now can we send this? */
11953 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
11954 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
11955 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
11956 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
11957 /* got data while shutting down */
11958 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
11959 *error = ECONNRESET;
11962 sctp_alloc_a_strmoq(stcb, sp);
11964 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11969 sp->sender_all_done = 0;
11970 sp->sinfo_flags = srcv->sinfo_flags;
11971 sp->timetolive = srcv->sinfo_timetolive;
11972 sp->ppid = srcv->sinfo_ppid;
11973 sp->context = srcv->sinfo_context;
11974 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
11976 sp->stream = srcv->sinfo_stream;
11977 sp->length = min(uio->uio_resid, max_send_len);
11978 if ((sp->length == (uint32_t) uio->uio_resid) &&
11979 ((user_marks_eor == 0) ||
11980 (srcv->sinfo_flags & SCTP_EOF) ||
11981 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
11982 sp->msg_is_complete = 1;
11984 sp->msg_is_complete = 0;
11986 sp->sender_all_done = 0;
11987 sp->some_taken = 0;
11988 sp->put_last_out = 0;
11989 resv_in_first = sizeof(struct sctp_data_chunk);
11990 sp->data = sp->tail_mbuf = NULL;
11991 if (sp->length == 0) {
11995 if (srcv->sinfo_keynumber_valid) {
11996 sp->auth_keyid = srcv->sinfo_keynumber;
11998 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12000 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12001 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12002 sp->holds_key_ref = 1;
12004 *error = sctp_copy_one(sp, uio, resv_in_first);
12007 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12010 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12012 atomic_add_int(&sp->net->ref_count, 1);
12016 sctp_set_prsctp_policy(sp);
12024 sctp_sosend(struct socket *so,
12025 struct sockaddr *addr,
12028 struct mbuf *control,
12033 int error, use_sndinfo = 0;
12034 struct sctp_sndrcvinfo sndrcvninfo;
12035 struct sockaddr *addr_to_use;
12037 #if defined(INET) && defined(INET6)
12038 struct sockaddr_in sin;
12043 /* process cmsg snd/rcv info (maybe a assoc-id) */
12044 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12045 sizeof(sndrcvninfo))) {
12050 addr_to_use = addr;
12051 #if defined(INET) && defined(INET6)
12052 if ((addr) && (addr->sa_family == AF_INET6)) {
12053 struct sockaddr_in6 *sin6;
12055 sin6 = (struct sockaddr_in6 *)addr;
12056 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12057 in6_sin6_2_sin(&sin, sin6);
12058 addr_to_use = (struct sockaddr *)&sin;
12062 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12065 use_sndinfo ? &sndrcvninfo : NULL
12073 sctp_lower_sosend(struct socket *so,
12074 struct sockaddr *addr,
12076 struct mbuf *i_pak,
12077 struct mbuf *control,
12079 struct sctp_sndrcvinfo *srcv
12084 unsigned int sndlen = 0, max_len;
12086 struct mbuf *top = NULL;
12087 int queue_only = 0, queue_only_for_init = 0;
12088 int free_cnt_applied = 0;
12090 int now_filled = 0;
12091 unsigned int inqueue_bytes = 0;
12092 struct sctp_block_entry be;
12093 struct sctp_inpcb *inp;
12094 struct sctp_tcb *stcb = NULL;
12095 struct timeval now;
12096 struct sctp_nets *net;
12097 struct sctp_association *asoc;
12098 struct sctp_inpcb *t_inp;
12099 int user_marks_eor;
12100 int create_lock_applied = 0;
12101 int nagle_applies = 0;
12102 int some_on_control = 0;
12103 int got_all_of_the_send = 0;
12104 int hold_tcblock = 0;
12105 int non_blocking = 0;
12106 uint32_t local_add_more, local_soresv = 0;
12108 uint16_t sinfo_flags;
12109 sctp_assoc_t sinfo_assoc_id;
12116 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12118 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12121 SCTP_RELEASE_PKT(i_pak);
12125 if ((uio == NULL) && (i_pak == NULL)) {
12126 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12129 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12130 atomic_add_int(&inp->total_sends, 1);
12132 if (uio->uio_resid < 0) {
12133 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12136 sndlen = uio->uio_resid;
12138 top = SCTP_HEADER_TO_CHAIN(i_pak);
12139 sndlen = SCTP_HEADER_LEN(i_pak);
12141 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12144 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12145 (inp->sctp_socket->so_qlimit)) {
12146 /* The listener can NOT send */
12147 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12152 * Pre-screen address, if one is given the sin-len
12153 * must be set correctly!
12156 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12158 switch (raddr->sa.sa_family) {
12161 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12162 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12166 port = raddr->sin.sin_port;
12171 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12172 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12176 port = raddr->sin6.sin6_port;
12180 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12181 error = EAFNOSUPPORT;
12188 sinfo_flags = srcv->sinfo_flags;
12189 sinfo_assoc_id = srcv->sinfo_assoc_id;
12190 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12191 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12192 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12196 if (srcv->sinfo_flags)
12197 SCTP_STAT_INCR(sctps_sends_with_flags);
12199 sinfo_flags = inp->def_send.sinfo_flags;
12200 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12202 if (sinfo_flags & SCTP_SENDALL) {
12203 /* its a sendall */
12204 error = sctp_sendall(inp, uio, top, srcv);
12208 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12209 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12213 /* now we must find the assoc */
12214 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12215 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12216 SCTP_INP_RLOCK(inp);
12217 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12219 SCTP_TCB_LOCK(stcb);
12222 SCTP_INP_RUNLOCK(inp);
12223 } else if (sinfo_assoc_id) {
12224 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12227 * Since we did not use findep we must
12228 * increment it, and if we don't find a tcb
12231 SCTP_INP_WLOCK(inp);
12232 SCTP_INP_INCR_REF(inp);
12233 SCTP_INP_WUNLOCK(inp);
12234 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12235 if (stcb == NULL) {
12236 SCTP_INP_WLOCK(inp);
12237 SCTP_INP_DECR_REF(inp);
12238 SCTP_INP_WUNLOCK(inp);
12243 if ((stcb == NULL) && (addr)) {
12244 /* Possible implicit send? */
12245 SCTP_ASOC_CREATE_LOCK(inp);
12246 create_lock_applied = 1;
12247 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12248 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12249 /* Should I really unlock ? */
12250 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12255 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12256 (addr->sa_family == AF_INET6)) {
12257 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12261 SCTP_INP_WLOCK(inp);
12262 SCTP_INP_INCR_REF(inp);
12263 SCTP_INP_WUNLOCK(inp);
12264 /* With the lock applied look again */
12265 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12266 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12267 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12269 if (stcb == NULL) {
12270 SCTP_INP_WLOCK(inp);
12271 SCTP_INP_DECR_REF(inp);
12272 SCTP_INP_WUNLOCK(inp);
12279 if (t_inp != inp) {
12280 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12285 if (stcb == NULL) {
12286 if (addr == NULL) {
12287 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12291 /* We must go ahead and start the INIT process */
12294 if ((sinfo_flags & SCTP_ABORT) ||
12295 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12297 * User asks to abort a non-existant assoc,
12298 * or EOF a non-existant assoc with no data
12300 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12304 /* get an asoc/stcb struct */
12305 vrf_id = inp->def_vrf_id;
12307 if (create_lock_applied == 0) {
12308 panic("Error, should hold create lock and I don't?");
12311 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12314 if (stcb == NULL) {
12315 /* Error is setup for us in the call */
12318 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12319 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12321 * Set the connected flag so we can queue
12324 soisconnecting(so);
12327 if (create_lock_applied) {
12328 SCTP_ASOC_CREATE_UNLOCK(inp);
12329 create_lock_applied = 0;
12331 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12334 * Turn on queue only flag to prevent data from
12338 asoc = &stcb->asoc;
12339 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12340 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12342 /* initialize authentication params for the assoc */
12343 sctp_initialize_auth_params(inp, stcb);
12346 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12347 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7);
12353 /* out with the INIT */
12354 queue_only_for_init = 1;
12356 * we may want to dig in after this call and adjust the MTU
12357 * value. It defaulted to 1500 (constant) but the ro
12358 * structure may now have an update and thus we may need to
12359 * change it BEFORE we append the message.
12363 asoc = &stcb->asoc;
12365 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12366 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12368 net = sctp_findnet(stcb, addr);
12371 if ((net == NULL) ||
12372 ((port != 0) && (port != stcb->rport))) {
12373 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12378 if (stcb->asoc.alternate) {
12379 net = stcb->asoc.alternate;
12381 net = stcb->asoc.primary_destination;
12384 atomic_add_int(&stcb->total_sends, 1);
12385 /* Keep the stcb from being freed under our feet */
12386 atomic_add_int(&asoc->refcnt, 1);
12387 free_cnt_applied = 1;
12389 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12390 if (sndlen > asoc->smallest_mtu) {
12391 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12396 if (SCTP_SO_IS_NBIO(so)
12397 || (flags & MSG_NBIO)
12401 /* would we block? */
12402 if (non_blocking) {
12403 if (hold_tcblock == 0) {
12404 SCTP_TCB_LOCK(stcb);
12407 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12408 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12409 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12410 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12411 if (sndlen > SCTP_SB_LIMIT_SND(so))
12414 error = EWOULDBLOCK;
12417 stcb->asoc.sb_send_resv += sndlen;
12418 SCTP_TCB_UNLOCK(stcb);
12421 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12423 local_soresv = sndlen;
12424 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12425 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12426 error = ECONNRESET;
12429 if (create_lock_applied) {
12430 SCTP_ASOC_CREATE_UNLOCK(inp);
12431 create_lock_applied = 0;
12433 if (asoc->stream_reset_outstanding) {
12435 * Can't queue any data while stream reset is underway.
12437 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
12441 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12442 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12445 /* we are now done with all control */
12447 sctp_m_freem(control);
12450 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12451 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12452 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12453 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12454 if (srcv->sinfo_flags & SCTP_ABORT) {
12457 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12458 error = ECONNRESET;
12462 /* Ok, we will attempt a msgsnd :> */
12464 p->td_ru.ru_msgsnd++;
12466 /* Are we aborting? */
12467 if (srcv->sinfo_flags & SCTP_ABORT) {
12469 int tot_demand, tot_out = 0, max_out;
12471 SCTP_STAT_INCR(sctps_sends_with_abort);
12472 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12473 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12474 /* It has to be up before we abort */
12475 /* how big is the user initiated abort? */
12476 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12480 if (hold_tcblock) {
12481 SCTP_TCB_UNLOCK(stcb);
12485 struct mbuf *cntm = NULL;
12487 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAIT, 1, MT_DATA);
12489 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12490 tot_out += SCTP_BUF_LEN(cntm);
12494 /* Must fit in a MTU */
12496 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12497 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12499 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12503 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAIT, 1, MT_DATA);
12506 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12510 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12511 max_out -= sizeof(struct sctp_abort_msg);
12512 if (tot_out > max_out) {
12516 struct sctp_paramhdr *ph;
12518 /* now move forward the data pointer */
12519 ph = mtod(mm, struct sctp_paramhdr *);
12520 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12521 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
12523 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12525 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12528 * Here if we can't get his data we
12529 * still abort we just don't get to
12530 * send the users note :-0
12537 SCTP_BUF_NEXT(mm) = top;
12541 if (hold_tcblock == 0) {
12542 SCTP_TCB_LOCK(stcb);
12544 atomic_add_int(&stcb->asoc.refcnt, -1);
12545 free_cnt_applied = 0;
12546 /* release this lock, otherwise we hang on ourselves */
12547 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12548 /* now relock the stcb so everything is sane */
12552 * In this case top is already chained to mm avoid double
12553 * free, since we free it below if top != NULL and driver
12554 * would free it after sending the packet out
12561 /* Calculate the maximum we can send */
12562 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12563 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12564 if (non_blocking) {
12565 /* we already checked for non-blocking above. */
12568 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12573 if (hold_tcblock) {
12574 SCTP_TCB_UNLOCK(stcb);
12577 /* Is the stream no. valid? */
12578 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12579 /* Invalid stream number */
12580 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12584 if (asoc->strmout == NULL) {
12585 /* huh? software error */
12586 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12590 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12591 if ((user_marks_eor == 0) &&
12592 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12593 /* It will NEVER fit */
12594 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12598 if ((uio == NULL) && user_marks_eor) {
12600 * We do not support eeor mode for
12601 * sending with mbuf chains (like sendfile).
12603 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12607 if (user_marks_eor) {
12608 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12611 * For non-eeor the whole message must fit in
12612 * the socket send buffer.
12614 local_add_more = sndlen;
12617 if (non_blocking) {
12618 goto skip_preblock;
12620 if (((max_len <= local_add_more) &&
12621 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12623 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12624 /* No room right now ! */
12625 SOCKBUF_LOCK(&so->so_snd);
12626 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12627 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12628 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12629 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12630 (unsigned int)SCTP_SB_LIMIT_SND(so),
12633 stcb->asoc.stream_queue_cnt,
12634 stcb->asoc.chunks_on_out_queue,
12635 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12636 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12637 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
12640 stcb->block_entry = &be;
12641 error = sbwait(&so->so_snd);
12642 stcb->block_entry = NULL;
12643 if (error || so->so_error || be.error) {
12646 error = so->so_error;
12651 SOCKBUF_UNLOCK(&so->so_snd);
12654 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12655 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12656 asoc, stcb->asoc.total_output_queue_size);
12658 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12661 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12663 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12664 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12668 SOCKBUF_UNLOCK(&so->so_snd);
12671 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12675 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
12676 * case NOTE: uio will be null when top/mbuf is passed
12679 if (srcv->sinfo_flags & SCTP_EOF) {
12680 got_all_of_the_send = 1;
12683 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12689 struct sctp_stream_queue_pending *sp;
12690 struct sctp_stream_out *strm;
12693 SCTP_TCB_SEND_LOCK(stcb);
12694 if ((asoc->stream_locked) &&
12695 (asoc->stream_locked_on != srcv->sinfo_stream)) {
12696 SCTP_TCB_SEND_UNLOCK(stcb);
12697 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12701 SCTP_TCB_SEND_UNLOCK(stcb);
12703 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
12704 if (strm->last_msg_incomplete == 0) {
12706 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
12707 if ((sp == NULL) || (error)) {
12710 SCTP_TCB_SEND_LOCK(stcb);
12711 if (sp->msg_is_complete) {
12712 strm->last_msg_incomplete = 0;
12713 asoc->stream_locked = 0;
12716 * Just got locked to this guy in case of an
12719 strm->last_msg_incomplete = 1;
12720 asoc->stream_locked = 1;
12721 asoc->stream_locked_on = srcv->sinfo_stream;
12722 sp->sender_all_done = 0;
12724 sctp_snd_sb_alloc(stcb, sp->length);
12725 atomic_add_int(&asoc->stream_queue_cnt, 1);
12726 if (srcv->sinfo_flags & SCTP_UNORDERED) {
12727 SCTP_STAT_INCR(sctps_sends_with_unord);
12729 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
12730 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
12731 SCTP_TCB_SEND_UNLOCK(stcb);
12733 SCTP_TCB_SEND_LOCK(stcb);
12734 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
12735 SCTP_TCB_SEND_UNLOCK(stcb);
12737 /* ???? Huh ??? last msg is gone */
12739 panic("Warning: Last msg marked incomplete, yet nothing left?");
12741 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
12742 strm->last_msg_incomplete = 0;
12748 while (uio->uio_resid > 0) {
12749 /* How much room do we have? */
12750 struct mbuf *new_tail, *mm;
12752 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12753 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
12757 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
12758 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
12759 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
12762 if (hold_tcblock) {
12763 SCTP_TCB_UNLOCK(stcb);
12766 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
12767 if ((mm == NULL) || error) {
12773 /* Update the mbuf and count */
12774 SCTP_TCB_SEND_LOCK(stcb);
12775 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12777 * we need to get out. Peer probably
12781 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
12782 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12783 error = ECONNRESET;
12785 SCTP_TCB_SEND_UNLOCK(stcb);
12788 if (sp->tail_mbuf) {
12789 /* tack it to the end */
12790 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
12791 sp->tail_mbuf = new_tail;
12793 /* A stolen mbuf */
12795 sp->tail_mbuf = new_tail;
12797 sctp_snd_sb_alloc(stcb, sndout);
12798 atomic_add_int(&sp->length, sndout);
12801 /* Did we reach EOR? */
12802 if ((uio->uio_resid == 0) &&
12803 ((user_marks_eor == 0) ||
12804 (srcv->sinfo_flags & SCTP_EOF) ||
12805 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12806 sp->msg_is_complete = 1;
12808 sp->msg_is_complete = 0;
12810 SCTP_TCB_SEND_UNLOCK(stcb);
12812 if (uio->uio_resid == 0) {
12817 if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
12819 * This is ugly but we must assure locking
12822 if (hold_tcblock == 0) {
12823 SCTP_TCB_LOCK(stcb);
12826 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
12827 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12828 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12829 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12835 SCTP_TCB_UNLOCK(stcb);
12838 /* wait for space now */
12839 if (non_blocking) {
12840 /* Non-blocking io in place out */
12843 /* What about the INIT, send it maybe */
12844 if (queue_only_for_init) {
12845 if (hold_tcblock == 0) {
12846 SCTP_TCB_LOCK(stcb);
12849 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
12850 /* a collision took us forward? */
12853 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
12854 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12858 if ((net->flight_size > net->cwnd) &&
12859 (asoc->sctp_cmt_on_off == 0)) {
12860 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
12862 } else if (asoc->ifp_had_enobuf) {
12863 SCTP_STAT_INCR(sctps_ifnomemqueued);
12864 if (net->flight_size > (2 * net->mtu)) {
12867 asoc->ifp_had_enobuf = 0;
12869 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
12870 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
12871 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
12872 (stcb->asoc.total_flight > 0) &&
12873 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
12874 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
12877 * Ok, Nagle is set on and we have data outstanding.
12878 * Don't send anything and let SACKs drive out the
12879 * data unless wen have a "full" segment to send.
12881 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12882 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
12884 SCTP_STAT_INCR(sctps_naglequeued);
12887 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12888 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
12889 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
12891 SCTP_STAT_INCR(sctps_naglesent);
12894 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12896 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
12897 nagle_applies, un_sent);
12898 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
12899 stcb->asoc.total_flight,
12900 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
12902 if (queue_only_for_init)
12903 queue_only_for_init = 0;
12904 if ((queue_only == 0) && (nagle_applies == 0)) {
12906 * need to start chunk output
12907 * before blocking.. note that if
12908 * a lock is already applied, then
12909 * the input via the net is happening
12910 * and I don't need to start output :-D
12912 if (hold_tcblock == 0) {
12913 if (SCTP_TCB_TRYLOCK(stcb)) {
12915 sctp_chunk_output(inp,
12917 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
12920 sctp_chunk_output(inp,
12922 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
12924 if (hold_tcblock == 1) {
12925 SCTP_TCB_UNLOCK(stcb);
12929 SOCKBUF_LOCK(&so->so_snd);
12931 * This is a bit strange, but I think it will
12932 * work. The total_output_queue_size is locked and
12933 * protected by the TCB_LOCK, which we just released.
12934 * There is a race that can occur between releasing it
12935 * above, and me getting the socket lock, where sacks
12936 * come in but we have not put the SB_WAIT on the
12937 * so_snd buffer to get the wakeup. After the LOCK
12938 * is applied the sack_processing will also need to
12939 * LOCK the so->so_snd to do the actual sowwakeup(). So
12940 * once we have the socket buffer lock if we recheck the
12941 * size we KNOW we will get to sleep safely with the
12942 * wakeup flag in place.
12944 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
12945 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
12946 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12947 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
12948 asoc, uio->uio_resid);
12951 stcb->block_entry = &be;
12952 error = sbwait(&so->so_snd);
12953 stcb->block_entry = NULL;
12955 if (error || so->so_error || be.error) {
12958 error = so->so_error;
12963 SOCKBUF_UNLOCK(&so->so_snd);
12966 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12967 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12968 asoc, stcb->asoc.total_output_queue_size);
12971 SOCKBUF_UNLOCK(&so->so_snd);
12972 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12976 SCTP_TCB_SEND_LOCK(stcb);
12978 if (sp->msg_is_complete == 0) {
12979 strm->last_msg_incomplete = 1;
12980 asoc->stream_locked = 1;
12981 asoc->stream_locked_on = srcv->sinfo_stream;
12983 sp->sender_all_done = 1;
12984 strm->last_msg_incomplete = 0;
12985 asoc->stream_locked = 0;
12988 SCTP_PRINTF("Huh no sp TSNH?\n");
12989 strm->last_msg_incomplete = 0;
12990 asoc->stream_locked = 0;
12992 SCTP_TCB_SEND_UNLOCK(stcb);
12993 if (uio->uio_resid == 0) {
12994 got_all_of_the_send = 1;
12997 /* We send in a 0, since we do NOT have any locks */
12998 error = sctp_msg_append(stcb, net, top, srcv, 0);
13000 if (srcv->sinfo_flags & SCTP_EOF) {
13002 * This should only happen for Panda for the mbuf
13003 * send case, which does NOT yet support EEOR mode.
13004 * Thus, we can just set this flag to do the proper
13007 got_all_of_the_send = 1;
13015 if ((srcv->sinfo_flags & SCTP_EOF) &&
13016 (got_all_of_the_send == 1)) {
13019 SCTP_STAT_INCR(sctps_sends_with_eof);
13021 if (hold_tcblock == 0) {
13022 SCTP_TCB_LOCK(stcb);
13025 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13026 if (TAILQ_EMPTY(&asoc->send_queue) &&
13027 TAILQ_EMPTY(&asoc->sent_queue) &&
13029 if (asoc->locked_on_sending) {
13032 /* there is nothing queued to send, so I'm done... */
13033 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13034 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13035 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13036 struct sctp_nets *netp;
13038 /* only send SHUTDOWN the first time through */
13039 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13040 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13042 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13043 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13044 sctp_stop_timers_for_shutdown(stcb);
13045 if (stcb->asoc.alternate) {
13046 netp = stcb->asoc.alternate;
13048 netp = stcb->asoc.primary_destination;
13050 sctp_send_shutdown(stcb, netp);
13051 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13053 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13054 asoc->primary_destination);
13058 * we still got (or just got) data to send, so set
13062 * XXX sockets draft says that SCTP_EOF should be
13063 * sent with no data. currently, we will allow user
13064 * data to be sent first and move to
13067 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13068 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13069 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13070 if (hold_tcblock == 0) {
13071 SCTP_TCB_LOCK(stcb);
13074 if (asoc->locked_on_sending) {
13075 /* Locked to send out the data */
13076 struct sctp_stream_queue_pending *sp;
13078 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13080 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13081 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13084 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13085 if (TAILQ_EMPTY(&asoc->send_queue) &&
13086 TAILQ_EMPTY(&asoc->sent_queue) &&
13087 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13089 if (free_cnt_applied) {
13090 atomic_add_int(&stcb->asoc.refcnt, -1);
13091 free_cnt_applied = 0;
13093 sctp_abort_an_association(stcb->sctp_ep, stcb,
13094 NULL, SCTP_SO_LOCKED);
13096 * now relock the stcb so everything
13103 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13104 asoc->primary_destination);
13105 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13110 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13111 some_on_control = 1;
13113 if (queue_only_for_init) {
13114 if (hold_tcblock == 0) {
13115 SCTP_TCB_LOCK(stcb);
13118 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13119 /* a collision took us forward? */
13122 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13123 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13127 if ((net->flight_size > net->cwnd) &&
13128 (stcb->asoc.sctp_cmt_on_off == 0)) {
13129 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13131 } else if (asoc->ifp_had_enobuf) {
13132 SCTP_STAT_INCR(sctps_ifnomemqueued);
13133 if (net->flight_size > (2 * net->mtu)) {
13136 asoc->ifp_had_enobuf = 0;
13138 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13139 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13140 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13141 (stcb->asoc.total_flight > 0) &&
13142 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13143 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13145 * Ok, Nagle is set on and we have data outstanding.
13146 * Don't send anything and let SACKs drive out the
13147 * data unless wen have a "full" segment to send.
13149 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13150 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13152 SCTP_STAT_INCR(sctps_naglequeued);
13155 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13156 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13157 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13159 SCTP_STAT_INCR(sctps_naglesent);
13162 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13163 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13164 nagle_applies, un_sent);
13165 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13166 stcb->asoc.total_flight,
13167 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13169 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13170 /* we can attempt to send too. */
13171 if (hold_tcblock == 0) {
13173 * If there is activity recv'ing sacks no need to
13176 if (SCTP_TCB_TRYLOCK(stcb)) {
13177 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13181 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13183 } else if ((queue_only == 0) &&
13184 (stcb->asoc.peers_rwnd == 0) &&
13185 (stcb->asoc.total_flight == 0)) {
13186 /* We get to have a probe outstanding */
13187 if (hold_tcblock == 0) {
13189 SCTP_TCB_LOCK(stcb);
13191 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13192 } else if (some_on_control) {
13193 int num_out, reason, frag_point;
13195 /* Here we do control only */
13196 if (hold_tcblock == 0) {
13198 SCTP_TCB_LOCK(stcb);
13200 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13201 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13202 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13204 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13205 queue_only, stcb->asoc.peers_rwnd, un_sent,
13206 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13207 stcb->asoc.total_output_queue_size, error);
13212 if (local_soresv && stcb) {
13213 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13215 if (create_lock_applied) {
13216 SCTP_ASOC_CREATE_UNLOCK(inp);
13218 if ((stcb) && hold_tcblock) {
13219 SCTP_TCB_UNLOCK(stcb);
13221 if (stcb && free_cnt_applied) {
13222 atomic_add_int(&stcb->asoc.refcnt, -1);
13226 if (mtx_owned(&stcb->tcb_mtx)) {
13227 panic("Leaving with tcb mtx owned?");
13229 if (mtx_owned(&stcb->tcb_send_mtx)) {
13230 panic("Leaving with tcb send mtx owned?");
13236 sctp_validate_no_locks(inp);
13238 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
13245 sctp_m_freem(control);
13252 * generate an AUTHentication chunk, if required
13255 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13256 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13257 struct sctp_tcb *stcb, uint8_t chunk)
13259 struct mbuf *m_auth;
13260 struct sctp_auth_chunk *auth;
13264 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13268 /* sysctl disabled auth? */
13269 if (SCTP_BASE_SYSCTL(sctp_auth_disable))
13272 /* peer doesn't do auth... */
13273 if (!stcb->asoc.peer_supports_auth) {
13276 /* does the requested chunk require auth? */
13277 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13280 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_DONTWAIT, 1, MT_HEADER);
13281 if (m_auth == NULL) {
13285 /* reserve some space if this will be the first mbuf */
13287 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13288 /* fill in the AUTH chunk details */
13289 auth = mtod(m_auth, struct sctp_auth_chunk *);
13290 bzero(auth, sizeof(*auth));
13291 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13292 auth->ch.chunk_flags = 0;
13293 chunk_len = sizeof(*auth) +
13294 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13295 auth->ch.chunk_length = htons(chunk_len);
13296 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13297 /* key id and hmac digest will be computed and filled in upon send */
13299 /* save the offset where the auth was inserted into the chain */
13301 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13302 *offset += SCTP_BUF_LEN(cn);
13305 /* update length and return pointer to the auth chunk */
13306 SCTP_BUF_LEN(m_auth) = chunk_len;
13307 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13308 if (auth_ret != NULL)
13316 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13318 struct nd_prefix *pfx = NULL;
13319 struct nd_pfxrouter *pfxrtr = NULL;
13320 struct sockaddr_in6 gw6;
13322 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13325 /* get prefix entry of address */
13326 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13327 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13329 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13330 &src6->sin6_addr, &pfx->ndpr_mask))
13333 /* no prefix entry in the prefix list */
13335 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13336 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13339 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13340 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13342 /* search installed gateway from prefix entry */
13343 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13344 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13345 gw6.sin6_family = AF_INET6;
13346 gw6.sin6_len = sizeof(struct sockaddr_in6);
13347 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13348 sizeof(struct in6_addr));
13349 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13350 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13351 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13352 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13353 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13354 ro->ro_rt->rt_gateway)) {
13355 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13359 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13366 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13369 struct sockaddr_in *sin, *mask;
13370 struct ifaddr *ifa;
13371 struct in_addr srcnetaddr, gwnetaddr;
13373 if (ro == NULL || ro->ro_rt == NULL ||
13374 sifa->address.sa.sa_family != AF_INET) {
13377 ifa = (struct ifaddr *)sifa->ifa;
13378 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13379 sin = (struct sockaddr_in *)&sifa->address.sin;
13380 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13381 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13382 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13383 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13385 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13386 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13387 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13388 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13389 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13390 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {