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_NOWAIT, 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 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3393 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3395 sndrcvinfo->sinfo_timetolive = 0;
3397 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3400 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
3403 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3404 sndrcvinfo->sinfo_keynumber_valid = 1;
3405 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3413 at += CMSG_ALIGN(cmh.cmsg_len);
3419 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3423 struct sctp_initmsg initmsg;
3426 struct sockaddr_in sin;
3430 struct sockaddr_in6 sin6;
3434 tlen = SCTP_BUF_LEN(control);
3437 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3438 /* There is not enough room for one more. */
3442 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3443 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3444 /* We dont't have a complete CMSG header. */
3448 if (((int)cmh.cmsg_len + at) > tlen) {
3449 /* We don't have the complete CMSG. */
3453 if (cmh.cmsg_level == IPPROTO_SCTP) {
3454 switch (cmh.cmsg_type) {
3456 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
3460 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3461 if (initmsg.sinit_max_attempts)
3462 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3463 if (initmsg.sinit_num_ostreams)
3464 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3465 if (initmsg.sinit_max_instreams)
3466 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3467 if (initmsg.sinit_max_init_timeo)
3468 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3469 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3470 struct sctp_stream_out *tmp_str;
3473 /* Default is NOT correct */
3474 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3475 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3476 SCTP_TCB_UNLOCK(stcb);
3477 SCTP_MALLOC(tmp_str,
3478 struct sctp_stream_out *,
3479 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3481 SCTP_TCB_LOCK(stcb);
3482 if (tmp_str != NULL) {
3483 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3484 stcb->asoc.strmout = tmp_str;
3485 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3487 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3489 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3490 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3491 stcb->asoc.strmout[i].chunks_on_queues = 0;
3492 stcb->asoc.strmout[i].next_sequence_send = 0;
3493 stcb->asoc.strmout[i].stream_no = i;
3494 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3495 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3500 case SCTP_DSTADDRV4:
3501 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3505 memset(&sin, 0, sizeof(struct sockaddr_in));
3506 sin.sin_family = AF_INET;
3507 sin.sin_len = sizeof(struct sockaddr_in);
3508 sin.sin_port = stcb->rport;
3509 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3510 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3511 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3512 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3516 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3517 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3524 case SCTP_DSTADDRV6:
3525 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3529 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3530 sin6.sin6_family = AF_INET6;
3531 sin6.sin6_len = sizeof(struct sockaddr_in6);
3532 sin6.sin6_port = stcb->rport;
3533 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3534 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3535 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3540 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3541 in6_sin6_2_sin(&sin, &sin6);
3542 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3543 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3544 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3548 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3549 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3555 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
3556 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3566 at += CMSG_ALIGN(cmh.cmsg_len);
3571 static struct sctp_tcb *
3572 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3574 struct mbuf *control,
3575 struct sctp_nets **net_p,
3580 struct sctp_tcb *stcb;
3581 struct sockaddr *addr;
3584 struct sockaddr_in sin;
3588 struct sockaddr_in6 sin6;
3592 tlen = SCTP_BUF_LEN(control);
3595 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3596 /* There is not enough room for one more. */
3600 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3601 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3602 /* We dont't have a complete CMSG header. */
3606 if (((int)cmh.cmsg_len + at) > tlen) {
3607 /* We don't have the complete CMSG. */
3611 if (cmh.cmsg_level == IPPROTO_SCTP) {
3612 switch (cmh.cmsg_type) {
3614 case SCTP_DSTADDRV4:
3615 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3619 memset(&sin, 0, sizeof(struct sockaddr_in));
3620 sin.sin_family = AF_INET;
3621 sin.sin_len = sizeof(struct sockaddr_in);
3622 sin.sin_port = port;
3623 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3624 addr = (struct sockaddr *)&sin;
3628 case SCTP_DSTADDRV6:
3629 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3633 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3634 sin6.sin6_family = AF_INET6;
3635 sin6.sin6_len = sizeof(struct sockaddr_in6);
3636 sin6.sin6_port = port;
3637 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3639 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3640 in6_sin6_2_sin(&sin, &sin6);
3641 addr = (struct sockaddr *)&sin;
3644 addr = (struct sockaddr *)&sin6;
3652 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3658 at += CMSG_ALIGN(cmh.cmsg_len);
3663 static struct mbuf *
3664 sctp_add_cookie(struct mbuf *init, int init_offset,
3665 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3667 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3668 struct sctp_state_cookie *stc;
3669 struct sctp_paramhdr *ph;
3674 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3675 sizeof(struct sctp_paramhdr)), 0,
3676 M_NOWAIT, 1, MT_DATA);
3680 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3681 if (copy_init == NULL) {
3685 #ifdef SCTP_MBUF_LOGGING
3686 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3689 for (mat = copy_init; mat; mat = SCTP_BUF_NEXT(mat)) {
3690 if (SCTP_BUF_IS_EXTENDED(mat)) {
3691 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3696 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3698 if (copy_initack == NULL) {
3700 sctp_m_freem(copy_init);
3703 #ifdef SCTP_MBUF_LOGGING
3704 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3707 for (mat = copy_initack; mat; mat = SCTP_BUF_NEXT(mat)) {
3708 if (SCTP_BUF_IS_EXTENDED(mat)) {
3709 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3714 /* easy side we just drop it on the end */
3715 ph = mtod(mret, struct sctp_paramhdr *);
3716 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3717 sizeof(struct sctp_paramhdr);
3718 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3719 sizeof(struct sctp_paramhdr));
3720 ph->param_type = htons(SCTP_STATE_COOKIE);
3721 ph->param_length = 0; /* fill in at the end */
3722 /* Fill in the stc cookie data */
3723 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3725 /* tack the INIT and then the INIT-ACK onto the chain */
3727 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3728 cookie_sz += SCTP_BUF_LEN(m_at);
3729 if (SCTP_BUF_NEXT(m_at) == NULL) {
3730 SCTP_BUF_NEXT(m_at) = copy_init;
3734 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3735 cookie_sz += SCTP_BUF_LEN(m_at);
3736 if (SCTP_BUF_NEXT(m_at) == NULL) {
3737 SCTP_BUF_NEXT(m_at) = copy_initack;
3741 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3742 cookie_sz += SCTP_BUF_LEN(m_at);
3743 if (SCTP_BUF_NEXT(m_at) == NULL) {
3747 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3749 /* no space, so free the entire chain */
3753 SCTP_BUF_LEN(sig) = 0;
3754 SCTP_BUF_NEXT(m_at) = sig;
3756 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3757 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3759 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3760 cookie_sz += SCTP_SIGNATURE_SIZE;
3761 ph->param_length = htons(cookie_sz);
3767 sctp_get_ect(struct sctp_tcb *stcb)
3769 if ((stcb != NULL) && (stcb->asoc.ecn_allowed == 1)) {
3770 return (SCTP_ECT0_BIT);
3776 #if defined(INET) || defined(INET6)
3778 sctp_handle_no_route(struct sctp_tcb *stcb,
3779 struct sctp_nets *net,
3782 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3785 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3786 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3787 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3788 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3789 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3790 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3794 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3795 net->dest_state &= ~SCTP_ADDR_PF;
3799 if (net == stcb->asoc.primary_destination) {
3800 /* need a new primary */
3801 struct sctp_nets *alt;
3803 alt = sctp_find_alternate_net(stcb, net, 0);
3805 if (stcb->asoc.alternate) {
3806 sctp_free_remote_addr(stcb->asoc.alternate);
3808 stcb->asoc.alternate = alt;
3809 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3810 if (net->ro._s_addr) {
3811 sctp_free_ifa(net->ro._s_addr);
3812 net->ro._s_addr = NULL;
3814 net->src_addr_selected = 0;
3824 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3825 struct sctp_tcb *stcb, /* may be NULL */
3826 struct sctp_nets *net,
3827 struct sockaddr *to,
3829 uint32_t auth_offset,
3830 struct sctp_auth_chunk *auth,
3831 uint16_t auth_keyid,
3832 int nofragment_flag,
3839 union sctp_sockstore *over_addr,
3840 uint8_t use_mflowid, uint32_t mflowid,
3841 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3842 int so_locked SCTP_UNUSED
3847 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3850 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3851 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3852 * - fill in the HMAC digest of any AUTH chunk in the packet.
3853 * - calculate and fill in the SCTP checksum.
3854 * - prepend an IP address header.
3855 * - if boundall use INADDR_ANY.
3856 * - if boundspecific do source address selection.
3857 * - set fragmentation option for ipV4.
3858 * - On return from IP output, check/adjust mtu size of output
3859 * interface and smallest_mtu size as well.
3861 /* Will need ifdefs around this */
3863 struct sctphdr *sctphdr;
3867 #if defined(INET) || defined(INET6)
3871 #if defined(INET) || defined(INET6)
3873 sctp_route_t *ro = NULL;
3874 struct udphdr *udp = NULL;
3879 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3880 struct socket *so = NULL;
3884 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
3885 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
3889 #if defined(INET) || defined(INET6)
3891 vrf_id = stcb->asoc.vrf_id;
3893 vrf_id = inp->def_vrf_id;
3896 /* fill in the HMAC digest for any AUTH chunk in the packet */
3897 if ((auth != NULL) && (stcb != NULL)) {
3898 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
3901 tos_value = net->dscp;
3903 tos_value = stcb->asoc.default_dscp;
3905 tos_value = inp->sctp_ep.default_dscp;
3908 switch (to->sa_family) {
3912 struct ip *ip = NULL;
3913 sctp_route_t iproute;
3916 len = sizeof(struct ip) + sizeof(struct sctphdr);
3918 len += sizeof(struct udphdr);
3920 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
3923 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
3926 SCTP_ALIGN_TO_END(newm, len);
3927 SCTP_BUF_LEN(newm) = len;
3928 SCTP_BUF_NEXT(newm) = m;
3932 if (net->flowidset == 0) {
3933 panic("Flow ID not set");
3936 m->m_pkthdr.flowid = net->flowid;
3937 m->m_flags |= M_FLOWID;
3939 if (use_mflowid != 0) {
3940 m->m_pkthdr.flowid = mflowid;
3941 m->m_flags |= M_FLOWID;
3944 packet_length = sctp_calculate_len(m);
3945 ip = mtod(m, struct ip *);
3946 ip->ip_v = IPVERSION;
3947 ip->ip_hl = (sizeof(struct ip) >> 2);
3948 if (tos_value == 0) {
3950 * This means especially, that it is not set
3951 * at the SCTP layer. So use the value from
3954 tos_value = inp->ip_inp.inp.inp_ip_tos;
3958 tos_value |= sctp_get_ect(stcb);
3960 if ((nofragment_flag) && (port == 0)) {
3961 ip->ip_off = htons(IP_DF);
3963 ip->ip_off = htons(0);
3965 /* FreeBSD has a function for ip_id's */
3966 ip->ip_id = ip_newid();
3968 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
3969 ip->ip_len = htons(packet_length);
3970 ip->ip_tos = tos_value;
3972 ip->ip_p = IPPROTO_UDP;
3974 ip->ip_p = IPPROTO_SCTP;
3979 memset(&iproute, 0, sizeof(iproute));
3980 memcpy(&ro->ro_dst, to, to->sa_len);
3982 ro = (sctp_route_t *) & net->ro;
3984 /* Now the address selection part */
3985 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
3987 /* call the routine to select the src address */
3988 if (net && out_of_asoc_ok == 0) {
3989 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
3990 sctp_free_ifa(net->ro._s_addr);
3991 net->ro._s_addr = NULL;
3992 net->src_addr_selected = 0;
3998 if (net->src_addr_selected == 0) {
3999 /* Cache the source address */
4000 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4003 net->src_addr_selected = 1;
4005 if (net->ro._s_addr == NULL) {
4006 /* No route to host */
4007 net->src_addr_selected = 0;
4008 sctp_handle_no_route(stcb, net, so_locked);
4009 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4011 return (EHOSTUNREACH);
4013 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4015 if (over_addr == NULL) {
4016 struct sctp_ifa *_lsrc;
4018 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4022 if (_lsrc == NULL) {
4023 sctp_handle_no_route(stcb, net, so_locked);
4024 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4026 return (EHOSTUNREACH);
4028 ip->ip_src = _lsrc->address.sin.sin_addr;
4029 sctp_free_ifa(_lsrc);
4031 ip->ip_src = over_addr->sin.sin_addr;
4032 SCTP_RTALLOC(ro, vrf_id);
4036 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4037 sctp_handle_no_route(stcb, net, so_locked);
4038 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4040 return (EHOSTUNREACH);
4042 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4043 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4044 udp->uh_dport = port;
4045 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4047 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4051 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4053 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4056 sctphdr->src_port = src_port;
4057 sctphdr->dest_port = dest_port;
4058 sctphdr->v_tag = v_tag;
4059 sctphdr->checksum = 0;
4062 * If source address selection fails and we find no
4063 * route then the ip_output should fail as well with
4064 * a NO_ROUTE_TO_HOST type error. We probably should
4065 * catch that somewhere and abort the association
4066 * right away (assuming this is an INIT being sent).
4068 if (ro->ro_rt == NULL) {
4070 * src addr selection failed to find a route
4071 * (or valid source addr), so we can't get
4072 * there from here (yet)!
4074 sctp_handle_no_route(stcb, net, so_locked);
4075 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4077 return (EHOSTUNREACH);
4079 if (ro != &iproute) {
4080 memcpy(&iproute, ro, sizeof(*ro));
4082 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4083 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4084 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4085 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4086 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4089 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4090 /* failed to prepend data, give up */
4091 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4095 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4097 #if defined(SCTP_WITH_NO_CSUM)
4098 SCTP_STAT_INCR(sctps_sendnocrc);
4100 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4101 SCTP_STAT_INCR(sctps_sendswcrc);
4104 SCTP_ENABLE_UDP_CSUM(o_pak);
4107 #if defined(SCTP_WITH_NO_CSUM)
4108 SCTP_STAT_INCR(sctps_sendnocrc);
4110 m->m_pkthdr.csum_flags = CSUM_SCTP;
4111 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4112 SCTP_STAT_INCR(sctps_sendhwcrc);
4115 #ifdef SCTP_PACKET_LOGGING
4116 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4117 sctp_packet_log(o_pak);
4119 /* send it out. table id is taken from stcb */
4120 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4121 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4122 so = SCTP_INP_SO(inp);
4123 SCTP_SOCKET_UNLOCK(so, 0);
4126 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4127 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4128 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4129 atomic_add_int(&stcb->asoc.refcnt, 1);
4130 SCTP_TCB_UNLOCK(stcb);
4131 SCTP_SOCKET_LOCK(so, 0);
4132 SCTP_TCB_LOCK(stcb);
4133 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4136 SCTP_STAT_INCR(sctps_sendpackets);
4137 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4139 SCTP_STAT_INCR(sctps_senderrors);
4141 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4143 /* free tempy routes */
4147 * PMTU check versus smallest asoc MTU goes
4150 if ((ro->ro_rt != NULL) &&
4151 (net->ro._s_addr)) {
4154 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4156 mtu -= sizeof(struct udphdr);
4158 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4159 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4162 } else if (ro->ro_rt == NULL) {
4163 /* route was freed */
4164 if (net->ro._s_addr &&
4165 net->src_addr_selected) {
4166 sctp_free_ifa(net->ro._s_addr);
4167 net->ro._s_addr = NULL;
4169 net->src_addr_selected = 0;
4178 uint32_t flowlabel, flowinfo;
4179 struct ip6_hdr *ip6h;
4180 struct route_in6 ip6route;
4182 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4184 struct sockaddr_in6 lsa6_storage;
4186 u_short prev_port = 0;
4190 flowlabel = net->flowlabel;
4192 flowlabel = stcb->asoc.default_flowlabel;
4194 flowlabel = inp->sctp_ep.default_flowlabel;
4196 if (flowlabel == 0) {
4198 * This means especially, that it is not set
4199 * at the SCTP layer. So use the value from
4202 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4204 flowlabel &= 0x000fffff;
4205 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
4207 len += sizeof(struct udphdr);
4209 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4212 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4215 SCTP_ALIGN_TO_END(newm, len);
4216 SCTP_BUF_LEN(newm) = len;
4217 SCTP_BUF_NEXT(newm) = m;
4221 if (net->flowidset == 0) {
4222 panic("Flow ID not set");
4225 m->m_pkthdr.flowid = net->flowid;
4226 m->m_flags |= M_FLOWID;
4228 if (use_mflowid != 0) {
4229 m->m_pkthdr.flowid = mflowid;
4230 m->m_flags |= M_FLOWID;
4233 packet_length = sctp_calculate_len(m);
4235 ip6h = mtod(m, struct ip6_hdr *);
4236 /* protect *sin6 from overwrite */
4237 sin6 = (struct sockaddr_in6 *)to;
4241 /* KAME hack: embed scopeid */
4242 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4243 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4247 memset(&ip6route, 0, sizeof(ip6route));
4248 ro = (sctp_route_t *) & ip6route;
4249 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4251 ro = (sctp_route_t *) & net->ro;
4254 * We assume here that inp_flow is in host byte
4255 * order within the TCB!
4257 if (tos_value == 0) {
4259 * This means especially, that it is not set
4260 * at the SCTP layer. So use the value from
4263 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4267 tos_value |= sctp_get_ect(stcb);
4271 flowinfo |= tos_value;
4273 flowinfo |= flowlabel;
4274 ip6h->ip6_flow = htonl(flowinfo);
4276 ip6h->ip6_nxt = IPPROTO_UDP;
4278 ip6h->ip6_nxt = IPPROTO_SCTP;
4280 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4281 ip6h->ip6_dst = sin6->sin6_addr;
4284 * Add SRC address selection here: we can only reuse
4285 * to a limited degree the kame src-addr-sel, since
4286 * we can try their selection but it may not be
4289 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4290 lsa6_tmp.sin6_family = AF_INET6;
4291 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4293 if (net && out_of_asoc_ok == 0) {
4294 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4295 sctp_free_ifa(net->ro._s_addr);
4296 net->ro._s_addr = NULL;
4297 net->src_addr_selected = 0;
4303 if (net->src_addr_selected == 0) {
4304 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4305 /* KAME hack: embed scopeid */
4306 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4307 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4310 /* Cache the source address */
4311 net->ro._s_addr = sctp_source_address_selection(inp,
4317 (void)sa6_recoverscope(sin6);
4318 net->src_addr_selected = 1;
4320 if (net->ro._s_addr == NULL) {
4321 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4322 net->src_addr_selected = 0;
4323 sctp_handle_no_route(stcb, net, so_locked);
4324 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4326 return (EHOSTUNREACH);
4328 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4330 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4331 /* KAME hack: embed scopeid */
4332 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4333 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4336 if (over_addr == NULL) {
4337 struct sctp_ifa *_lsrc;
4339 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4343 if (_lsrc == NULL) {
4344 sctp_handle_no_route(stcb, net, so_locked);
4345 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4347 return (EHOSTUNREACH);
4349 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4350 sctp_free_ifa(_lsrc);
4352 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4353 SCTP_RTALLOC(ro, vrf_id);
4355 (void)sa6_recoverscope(sin6);
4357 lsa6->sin6_port = inp->sctp_lport;
4359 if (ro->ro_rt == NULL) {
4361 * src addr selection failed to find a route
4362 * (or valid source addr), so we can't get
4365 sctp_handle_no_route(stcb, net, so_locked);
4366 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4368 return (EHOSTUNREACH);
4371 * XXX: sa6 may not have a valid sin6_scope_id in
4372 * the non-SCOPEDROUTING case.
4374 bzero(&lsa6_storage, sizeof(lsa6_storage));
4375 lsa6_storage.sin6_family = AF_INET6;
4376 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4377 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4378 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4379 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4384 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4385 lsa6_storage.sin6_port = inp->sctp_lport;
4386 lsa6 = &lsa6_storage;
4387 ip6h->ip6_src = lsa6->sin6_addr;
4390 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4391 sctp_handle_no_route(stcb, net, so_locked);
4392 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4394 return (EHOSTUNREACH);
4396 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4397 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4398 udp->uh_dport = port;
4399 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4401 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4403 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4406 sctphdr->src_port = src_port;
4407 sctphdr->dest_port = dest_port;
4408 sctphdr->v_tag = v_tag;
4409 sctphdr->checksum = 0;
4412 * We set the hop limit now since there is a good
4413 * chance that our ro pointer is now filled
4415 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4416 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4419 /* Copy to be sure something bad is not happening */
4420 sin6->sin6_addr = ip6h->ip6_dst;
4421 lsa6->sin6_addr = ip6h->ip6_src;
4424 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4425 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4426 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4427 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4428 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4430 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4432 * preserve the port and scope for link
4435 prev_scope = sin6->sin6_scope_id;
4436 prev_port = sin6->sin6_port;
4438 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4439 /* failed to prepend data, give up */
4441 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4444 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4446 #if defined(SCTP_WITH_NO_CSUM)
4447 SCTP_STAT_INCR(sctps_sendnocrc);
4449 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4450 SCTP_STAT_INCR(sctps_sendswcrc);
4452 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4453 udp->uh_sum = 0xffff;
4456 #if defined(SCTP_WITH_NO_CSUM)
4457 SCTP_STAT_INCR(sctps_sendnocrc);
4459 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4460 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4461 SCTP_STAT_INCR(sctps_sendhwcrc);
4464 /* send it out. table id is taken from stcb */
4465 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4466 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4467 so = SCTP_INP_SO(inp);
4468 SCTP_SOCKET_UNLOCK(so, 0);
4471 #ifdef SCTP_PACKET_LOGGING
4472 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4473 sctp_packet_log(o_pak);
4475 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4476 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4477 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4478 atomic_add_int(&stcb->asoc.refcnt, 1);
4479 SCTP_TCB_UNLOCK(stcb);
4480 SCTP_SOCKET_LOCK(so, 0);
4481 SCTP_TCB_LOCK(stcb);
4482 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4486 /* for link local this must be done */
4487 sin6->sin6_scope_id = prev_scope;
4488 sin6->sin6_port = prev_port;
4490 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4491 SCTP_STAT_INCR(sctps_sendpackets);
4492 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4494 SCTP_STAT_INCR(sctps_senderrors);
4497 /* Now if we had a temp route free it */
4501 * PMTU check versus smallest asoc MTU goes
4504 if (ro->ro_rt == NULL) {
4505 /* Route was freed */
4506 if (net->ro._s_addr &&
4507 net->src_addr_selected) {
4508 sctp_free_ifa(net->ro._s_addr);
4509 net->ro._s_addr = NULL;
4511 net->src_addr_selected = 0;
4513 if ((ro->ro_rt != NULL) &&
4514 (net->ro._s_addr)) {
4517 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4519 (stcb->asoc.smallest_mtu > mtu)) {
4520 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4523 net->mtu -= sizeof(struct udphdr);
4527 if (ND_IFINFO(ifp)->linkmtu &&
4528 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4529 sctp_mtu_size_reset(inp,
4531 ND_IFINFO(ifp)->linkmtu);
4539 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4540 ((struct sockaddr *)to)->sa_family);
4542 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4549 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4550 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4556 struct sctp_nets *net;
4557 struct sctp_init_chunk *init;
4558 struct sctp_supported_addr_param *sup_addr;
4559 struct sctp_adaptation_layer_indication *ali;
4560 struct sctp_supported_chunk_types_param *pr_supported;
4561 struct sctp_paramhdr *ph;
4562 int cnt_inits_to = 0;
4564 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4566 /* INIT's always go to the primary (and usually ONLY address) */
4567 net = stcb->asoc.primary_destination;
4569 net = TAILQ_FIRST(&stcb->asoc.nets);
4574 /* we confirm any address we send an INIT to */
4575 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4576 (void)sctp_set_primary_addr(stcb, NULL, net);
4578 /* we confirm any address we send an INIT to */
4579 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4581 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4583 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4585 * special hook, if we are sending to link local it will not
4586 * show up in our private address count.
4588 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4592 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4593 /* This case should not happen */
4594 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4597 /* start the INIT timer */
4598 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4600 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4602 /* No memory, INIT timer will re-attempt. */
4603 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4606 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4609 * assume peer supports asconf in order to be able to queue local
4610 * address changes while an INIT is in flight and before the assoc
4613 stcb->asoc.peer_supports_asconf = 1;
4614 /* Now lets put the chunk header in place */
4615 init = mtod(m, struct sctp_init_chunk *);
4616 /* now the chunk header */
4617 init->ch.chunk_type = SCTP_INITIATION;
4618 init->ch.chunk_flags = 0;
4619 /* fill in later from mbuf we build */
4620 init->ch.chunk_length = 0;
4621 /* place in my tag */
4622 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4623 /* set up some of the credits. */
4624 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4625 SCTP_MINIMAL_RWND));
4626 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4627 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4628 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4630 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4633 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4634 if (stcb->asoc.scope.ipv4_addr_legal) {
4635 parameter_len += (uint16_t) sizeof(uint16_t);
4637 if (stcb->asoc.scope.ipv6_addr_legal) {
4638 parameter_len += (uint16_t) sizeof(uint16_t);
4640 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4641 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4642 sup_addr->ph.param_length = htons(parameter_len);
4644 if (stcb->asoc.scope.ipv4_addr_legal) {
4645 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4647 if (stcb->asoc.scope.ipv6_addr_legal) {
4648 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4650 padding_len = 4 - 2 * i;
4651 chunk_len += parameter_len;
4653 /* Adaptation layer indication parameter */
4654 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4655 if (padding_len > 0) {
4656 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4657 chunk_len += padding_len;
4660 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4661 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4662 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4663 ali->ph.param_length = htons(parameter_len);
4664 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
4665 chunk_len += parameter_len;
4667 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4668 /* Add NAT friendly parameter. */
4669 if (padding_len > 0) {
4670 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4671 chunk_len += padding_len;
4674 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4675 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4676 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4677 ph->param_length = htons(parameter_len);
4678 chunk_len += parameter_len;
4680 /* now any cookie time extensions */
4681 if (stcb->asoc.cookie_preserve_req) {
4682 struct sctp_cookie_perserve_param *cookie_preserve;
4684 if (padding_len > 0) {
4685 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4686 chunk_len += padding_len;
4689 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4690 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4691 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4692 cookie_preserve->ph.param_length = htons(parameter_len);
4693 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4694 stcb->asoc.cookie_preserve_req = 0;
4695 chunk_len += parameter_len;
4698 if (stcb->asoc.ecn_allowed == 1) {
4699 if (padding_len > 0) {
4700 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4701 chunk_len += padding_len;
4704 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4705 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4706 ph->param_type = htons(SCTP_ECN_CAPABLE);
4707 ph->param_length = htons(parameter_len);
4708 chunk_len += parameter_len;
4710 /* And now tell the peer we do support PR-SCTP. */
4711 if (padding_len > 0) {
4712 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4713 chunk_len += padding_len;
4716 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4717 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4718 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4719 ph->param_length = htons(parameter_len);
4720 chunk_len += parameter_len;
4722 /* And now tell the peer we do all the extensions */
4723 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4724 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4726 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4727 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4728 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4729 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4730 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4731 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4732 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4734 if (stcb->asoc.sctp_nr_sack_on_off == 1) {
4735 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4737 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4738 pr_supported->ph.param_length = htons(parameter_len);
4739 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4740 chunk_len += parameter_len;
4742 /* add authentication parameters */
4743 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4744 /* attach RANDOM parameter, if available */
4745 if (stcb->asoc.authinfo.random != NULL) {
4746 struct sctp_auth_random *randp;
4748 if (padding_len > 0) {
4749 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4750 chunk_len += padding_len;
4753 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4754 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4755 /* random key already contains the header */
4756 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4757 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4758 chunk_len += parameter_len;
4760 /* add HMAC_ALGO parameter */
4761 if ((stcb->asoc.local_hmacs != NULL) &&
4762 (stcb->asoc.local_hmacs->num_algo > 0)) {
4763 struct sctp_auth_hmac_algo *hmacs;
4765 if (padding_len > 0) {
4766 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4767 chunk_len += padding_len;
4770 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4771 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4772 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4773 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4774 hmacs->ph.param_length = htons(parameter_len);
4775 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4776 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4777 chunk_len += parameter_len;
4779 /* add CHUNKS parameter */
4780 if (sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks) > 0) {
4781 struct sctp_auth_chunk_list *chunks;
4783 if (padding_len > 0) {
4784 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4785 chunk_len += padding_len;
4788 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4789 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4790 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4791 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4792 chunks->ph.param_length = htons(parameter_len);
4793 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4794 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4795 chunk_len += parameter_len;
4798 SCTP_BUF_LEN(m) = chunk_len;
4800 /* now the addresses */
4802 * To optimize this we could put the scoping stuff into a structure
4803 * and remove the individual uint8's from the assoc structure. Then
4804 * we could just sifa in the address within the stcb. But for now
4805 * this is a quick hack to get the address stuff teased apart.
4807 sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope, m, cnt_inits_to, &padding_len, &chunk_len);
4809 init->ch.chunk_length = htons(chunk_len);
4810 if (padding_len > 0) {
4811 struct mbuf *m_at, *mp_last;
4814 for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
4815 if (SCTP_BUF_NEXT(m_at) == NULL)
4818 if ((mp_last == NULL) || sctp_add_pad_tombuf(mp_last, padding_len)) {
4823 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4824 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4825 (struct sockaddr *)&net->ro._l_addr,
4826 m, 0, NULL, 0, 0, 0, 0,
4827 inp->sctp_lport, stcb->rport, htonl(0),
4831 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4832 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4833 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4837 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4838 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4841 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4842 * being equal to the beginning of the params i.e. (iphlen +
4843 * sizeof(struct sctp_init_msg) parse through the parameters to the
4844 * end of the mbuf verifying that all parameters are known.
4846 * For unknown parameters build and return a mbuf with
4847 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4848 * processing this chunk stop, and set *abort_processing to 1.
4850 * By having param_offset be pre-set to where parameters begin it is
4851 * hoped that this routine may be reused in the future by new
4854 struct sctp_paramhdr *phdr, params;
4856 struct mbuf *mat, *op_err;
4857 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4858 int at, limit, pad_needed;
4859 uint16_t ptype, plen, padded_size;
4862 *abort_processing = 0;
4865 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4868 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4869 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4870 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4871 ptype = ntohs(phdr->param_type);
4872 plen = ntohs(phdr->param_length);
4873 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4874 /* wacked parameter */
4875 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4878 limit -= SCTP_SIZE32(plen);
4880 * All parameters for all chunks that we know/understand are
4881 * listed here. We process them other places and make
4882 * appropriate stop actions per the upper bits. However this
4883 * is the generic routine processor's can call to get back
4884 * an operr.. to either incorporate (init-ack) or send.
4886 padded_size = SCTP_SIZE32(plen);
4888 /* Param's with variable size */
4889 case SCTP_HEARTBEAT_INFO:
4890 case SCTP_STATE_COOKIE:
4891 case SCTP_UNRECOG_PARAM:
4892 case SCTP_ERROR_CAUSE_IND:
4896 /* Param's with variable size within a range */
4897 case SCTP_CHUNK_LIST:
4898 case SCTP_SUPPORTED_CHUNK_EXT:
4899 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
4900 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
4905 case SCTP_SUPPORTED_ADDRTYPE:
4906 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
4907 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
4913 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
4914 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
4919 case SCTP_SET_PRIM_ADDR:
4920 case SCTP_DEL_IP_ADDRESS:
4921 case SCTP_ADD_IP_ADDRESS:
4922 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
4923 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
4924 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
4929 /* Param's with a fixed size */
4930 case SCTP_IPV4_ADDRESS:
4931 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
4932 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
4937 case SCTP_IPV6_ADDRESS:
4938 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
4939 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
4944 case SCTP_COOKIE_PRESERVE:
4945 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
4946 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
4951 case SCTP_HAS_NAT_SUPPORT:
4954 case SCTP_PRSCTP_SUPPORTED:
4956 if (padded_size != sizeof(struct sctp_paramhdr)) {
4957 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
4962 case SCTP_ECN_CAPABLE:
4963 if (padded_size != sizeof(struct sctp_ecn_supported_param)) {
4964 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
4969 case SCTP_ULP_ADAPTATION:
4970 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
4971 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
4976 case SCTP_SUCCESS_REPORT:
4977 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
4978 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
4983 case SCTP_HOSTNAME_ADDRESS:
4985 /* We can NOT handle HOST NAME addresses!! */
4988 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
4989 *abort_processing = 1;
4990 if (op_err == NULL) {
4991 /* Ok need to try to get a mbuf */
4993 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
4995 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
4998 l_len += sizeof(struct sctp_paramhdr);
4999 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5001 SCTP_BUF_LEN(op_err) = 0;
5003 * pre-reserve space for ip
5004 * and sctp header and
5008 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5010 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5012 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5013 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5017 /* If we have space */
5018 struct sctp_paramhdr s;
5021 uint32_t cpthis = 0;
5023 pad_needed = 4 - (err_at % 4);
5024 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5025 err_at += pad_needed;
5027 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5028 s.param_length = htons(sizeof(s) + plen);
5029 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5030 err_at += sizeof(s);
5031 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5033 sctp_m_freem(op_err);
5035 * we are out of memory but
5036 * we still need to have a
5037 * look at what to do (the
5038 * system is in trouble
5043 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5050 * we do not recognize the parameter figure out what
5053 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5054 if ((ptype & 0x4000) == 0x4000) {
5055 /* Report bit is set?? */
5056 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5057 if (op_err == NULL) {
5060 /* Ok need to try to get an mbuf */
5062 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5064 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5067 l_len += sizeof(struct sctp_paramhdr);
5068 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5070 SCTP_BUF_LEN(op_err) = 0;
5072 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5074 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5076 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5077 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5081 /* If we have space */
5082 struct sctp_paramhdr s;
5085 uint32_t cpthis = 0;
5087 pad_needed = 4 - (err_at % 4);
5088 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5089 err_at += pad_needed;
5091 s.param_type = htons(SCTP_UNRECOG_PARAM);
5092 s.param_length = htons(sizeof(s) + plen);
5093 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5094 err_at += sizeof(s);
5095 if (plen > sizeof(tempbuf)) {
5096 plen = sizeof(tempbuf);
5098 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5100 sctp_m_freem(op_err);
5102 * we are out of memory but
5103 * we still need to have a
5104 * look at what to do (the
5105 * system is in trouble
5109 goto more_processing;
5111 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5116 if ((ptype & 0x8000) == 0x0000) {
5117 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5120 /* skip this chunk and continue processing */
5121 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5122 at += SCTP_SIZE32(plen);
5127 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5131 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5132 *abort_processing = 1;
5133 if ((op_err == NULL) && phdr) {
5137 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5139 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5141 l_len += (2 * sizeof(struct sctp_paramhdr));
5142 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5144 SCTP_BUF_LEN(op_err) = 0;
5146 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5148 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5150 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5151 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5154 if ((op_err) && phdr) {
5155 struct sctp_paramhdr s;
5158 uint32_t cpthis = 0;
5160 pad_needed = 4 - (err_at % 4);
5161 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5162 err_at += pad_needed;
5164 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5165 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5166 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5167 err_at += sizeof(s);
5168 /* Only copy back the p-hdr that caused the issue */
5169 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5175 sctp_are_there_new_addresses(struct sctp_association *asoc,
5176 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5179 * Given a INIT packet, look through the packet to verify that there
5180 * are NO new addresses. As we go through the parameters add reports
5181 * of any un-understood parameters that require an error. Also we
5182 * must return (1) to drop the packet if we see a un-understood
5183 * parameter that tells us to drop the chunk.
5185 struct sockaddr *sa_touse;
5186 struct sockaddr *sa;
5187 struct sctp_paramhdr *phdr, params;
5188 uint16_t ptype, plen;
5190 struct sctp_nets *net;
5193 struct sockaddr_in sin4, *sa4;
5197 struct sockaddr_in6 sin6, *sa6;
5202 memset(&sin4, 0, sizeof(sin4));
5203 sin4.sin_family = AF_INET;
5204 sin4.sin_len = sizeof(sin4);
5207 memset(&sin6, 0, sizeof(sin6));
5208 sin6.sin6_family = AF_INET6;
5209 sin6.sin6_len = sizeof(sin6);
5211 /* First what about the src address of the pkt ? */
5213 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5214 sa = (struct sockaddr *)&net->ro._l_addr;
5215 if (sa->sa_family == src->sa_family) {
5217 if (sa->sa_family == AF_INET) {
5218 struct sockaddr_in *src4;
5220 sa4 = (struct sockaddr_in *)sa;
5221 src4 = (struct sockaddr_in *)src;
5222 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5229 if (sa->sa_family == AF_INET6) {
5230 struct sockaddr_in6 *src6;
5232 sa6 = (struct sockaddr_in6 *)sa;
5233 src6 = (struct sockaddr_in6 *)src;
5234 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5243 /* New address added! no need to look futher. */
5246 /* Ok so far lets munge through the rest of the packet */
5247 offset += sizeof(struct sctp_init_chunk);
5248 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5251 ptype = ntohs(phdr->param_type);
5252 plen = ntohs(phdr->param_length);
5255 case SCTP_IPV4_ADDRESS:
5257 struct sctp_ipv4addr_param *p4, p4_buf;
5259 phdr = sctp_get_next_param(in_initpkt, offset,
5260 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5261 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5265 p4 = (struct sctp_ipv4addr_param *)phdr;
5266 sin4.sin_addr.s_addr = p4->addr;
5267 sa_touse = (struct sockaddr *)&sin4;
5272 case SCTP_IPV6_ADDRESS:
5274 struct sctp_ipv6addr_param *p6, p6_buf;
5276 phdr = sctp_get_next_param(in_initpkt, offset,
5277 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5278 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5282 p6 = (struct sctp_ipv6addr_param *)phdr;
5283 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5285 sa_touse = (struct sockaddr *)&sin6;
5294 /* ok, sa_touse points to one to check */
5296 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5297 sa = (struct sockaddr *)&net->ro._l_addr;
5298 if (sa->sa_family != sa_touse->sa_family) {
5302 if (sa->sa_family == AF_INET) {
5303 sa4 = (struct sockaddr_in *)sa;
5304 if (sa4->sin_addr.s_addr ==
5305 sin4.sin_addr.s_addr) {
5312 if (sa->sa_family == AF_INET6) {
5313 sa6 = (struct sockaddr_in6 *)sa;
5314 if (SCTP6_ARE_ADDR_EQUAL(
5323 /* New addr added! no need to look further */
5327 offset += SCTP_SIZE32(plen);
5328 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5334 * Given a MBUF chain that was sent into us containing an INIT. Build a
5335 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5336 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5337 * message (i.e. the struct sctp_init_msg).
5340 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5341 struct mbuf *init_pkt, int iphlen, int offset,
5342 struct sockaddr *src, struct sockaddr *dst,
5343 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5344 uint8_t use_mflowid, uint32_t mflowid,
5345 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5347 struct sctp_association *asoc;
5348 struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last;
5349 struct sctp_init_ack_chunk *initack;
5350 struct sctp_adaptation_layer_indication *ali;
5351 struct sctp_ecn_supported_param *ecn;
5352 struct sctp_prsctp_supported_param *prsctp;
5353 struct sctp_supported_chunk_types_param *pr_supported;
5354 union sctp_sockstore *over_addr;
5357 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5358 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5359 struct sockaddr_in *sin;
5363 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5364 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5365 struct sockaddr_in6 *sin6;
5368 struct sockaddr *to;
5369 struct sctp_state_cookie stc;
5370 struct sctp_nets *net = NULL;
5371 uint8_t *signature = NULL;
5372 int cnt_inits_to = 0;
5373 uint16_t his_limit, i_want;
5374 int abort_flag, padval;
5377 int nat_friendly = 0;
5386 if ((asoc != NULL) &&
5387 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5388 (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) {
5389 /* new addresses, out of here in non-cookie-wait states */
5391 * Send a ABORT, we don't add the new address error clause
5392 * though we even set the T bit and copy in the 0 tag.. this
5393 * looks no different than if no listener was present.
5395 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5397 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5398 use_mflowid, mflowid,
5403 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5404 (offset + sizeof(struct sctp_init_chunk)),
5405 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5408 if (op_err == NULL) {
5409 char msg[SCTP_DIAG_INFO_LEN];
5411 snprintf(msg, sizeof(msg), "%s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
5412 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5415 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5416 init_chk->init.initiate_tag, op_err,
5417 use_mflowid, mflowid,
5421 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5423 /* No memory, INIT timer will re-attempt. */
5425 sctp_m_freem(op_err);
5428 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
5431 * We might not overwrite the identification[] completely and on
5432 * some platforms time_entered will contain some padding. Therefore
5433 * zero out the cookie to avoid putting uninitialized memory on the
5436 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5438 /* the time I built cookie */
5439 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5441 /* populate any tie tags */
5443 /* unlock before tag selections */
5444 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5445 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5446 stc.cookie_life = asoc->cookie_life;
5447 net = asoc->primary_destination;
5449 stc.tie_tag_my_vtag = 0;
5450 stc.tie_tag_peer_vtag = 0;
5451 /* life I will award this cookie */
5452 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5455 /* copy in the ports for later check */
5456 stc.myport = sh->dest_port;
5457 stc.peerport = sh->src_port;
5460 * If we wanted to honor cookie life extentions, we would add to
5461 * stc.cookie_life. For now we should NOT honor any extension
5463 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5464 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5465 stc.ipv6_addr_legal = 1;
5466 if (SCTP_IPV6_V6ONLY(inp)) {
5467 stc.ipv4_addr_legal = 0;
5469 stc.ipv4_addr_legal = 1;
5472 stc.ipv6_addr_legal = 0;
5473 stc.ipv4_addr_legal = 1;
5475 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5482 switch (dst->sa_family) {
5486 /* lookup address */
5487 stc.address[0] = src4->sin_addr.s_addr;
5491 stc.addr_type = SCTP_IPV4_ADDRESS;
5492 /* local from address */
5493 stc.laddress[0] = dst4->sin_addr.s_addr;
5494 stc.laddress[1] = 0;
5495 stc.laddress[2] = 0;
5496 stc.laddress[3] = 0;
5497 stc.laddr_type = SCTP_IPV4_ADDRESS;
5498 /* scope_id is only for v6 */
5500 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5501 if (IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) {
5506 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5507 /* Must use the address in this case */
5508 if (sctp_is_address_on_local_host(src, vrf_id)) {
5509 stc.loopback_scope = 1;
5512 stc.local_scope = 0;
5520 stc.addr_type = SCTP_IPV6_ADDRESS;
5521 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5522 stc.scope_id = in6_getscope(&src6->sin6_addr);
5523 if (sctp_is_address_on_local_host(src, vrf_id)) {
5524 stc.loopback_scope = 1;
5525 stc.local_scope = 0;
5528 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr)) {
5530 * If the new destination is a
5531 * LINK_LOCAL we must have common
5532 * both site and local scope. Don't
5533 * set local scope though since we
5534 * must depend on the source to be
5535 * added implicitly. We cannot
5536 * assure just because we share one
5537 * link that all links are common.
5539 stc.local_scope = 0;
5543 * we start counting for the private
5544 * address stuff at 1. since the
5545 * link local we source from won't
5546 * show up in our scoped count.
5550 * pull out the scope_id from
5553 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr)) {
5555 * If the new destination is
5556 * SITE_LOCAL then we must have site
5561 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5562 stc.laddr_type = SCTP_IPV6_ADDRESS;
5572 /* set the scope per the existing tcb */
5575 struct sctp_nets *lnet;
5579 stc.loopback_scope = asoc->scope.loopback_scope;
5580 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5581 stc.site_scope = asoc->scope.site_scope;
5582 stc.local_scope = asoc->scope.local_scope;
5584 /* Why do we not consider IPv4 LL addresses? */
5585 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5586 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5587 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5589 * if we have a LL address, start
5597 /* use the net pointer */
5598 to = (struct sockaddr *)&net->ro._l_addr;
5599 switch (to->sa_family) {
5602 sin = (struct sockaddr_in *)to;
5603 stc.address[0] = sin->sin_addr.s_addr;
5607 stc.addr_type = SCTP_IPV4_ADDRESS;
5608 if (net->src_addr_selected == 0) {
5610 * strange case here, the INIT should have
5611 * did the selection.
5613 net->ro._s_addr = sctp_source_address_selection(inp,
5614 stcb, (sctp_route_t *) & net->ro,
5616 if (net->ro._s_addr == NULL)
5619 net->src_addr_selected = 1;
5622 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5623 stc.laddress[1] = 0;
5624 stc.laddress[2] = 0;
5625 stc.laddress[3] = 0;
5626 stc.laddr_type = SCTP_IPV4_ADDRESS;
5627 /* scope_id is only for v6 */
5633 sin6 = (struct sockaddr_in6 *)to;
5634 memcpy(&stc.address, &sin6->sin6_addr,
5635 sizeof(struct in6_addr));
5636 stc.addr_type = SCTP_IPV6_ADDRESS;
5637 stc.scope_id = sin6->sin6_scope_id;
5638 if (net->src_addr_selected == 0) {
5640 * strange case here, the INIT should have
5641 * done the selection.
5643 net->ro._s_addr = sctp_source_address_selection(inp,
5644 stcb, (sctp_route_t *) & net->ro,
5646 if (net->ro._s_addr == NULL)
5649 net->src_addr_selected = 1;
5651 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5652 sizeof(struct in6_addr));
5653 stc.laddr_type = SCTP_IPV6_ADDRESS;
5658 /* Now lets put the SCTP header in place */
5659 initack = mtod(m, struct sctp_init_ack_chunk *);
5660 /* Save it off for quick ref */
5661 stc.peers_vtag = init_chk->init.initiate_tag;
5663 memcpy(stc.identification, SCTP_VERSION_STRING,
5664 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5665 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5666 /* now the chunk header */
5667 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5668 initack->ch.chunk_flags = 0;
5669 /* fill in later from mbuf we build */
5670 initack->ch.chunk_length = 0;
5671 /* place in my tag */
5672 if ((asoc != NULL) &&
5673 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5674 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5675 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5676 /* re-use the v-tags and init-seq here */
5677 initack->init.initiate_tag = htonl(asoc->my_vtag);
5678 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5680 uint32_t vtag, itsn;
5682 if (hold_inp_lock) {
5683 SCTP_INP_INCR_REF(inp);
5684 SCTP_INP_RUNLOCK(inp);
5687 atomic_add_int(&asoc->refcnt, 1);
5688 SCTP_TCB_UNLOCK(stcb);
5690 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5691 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5693 * Got a duplicate vtag on some guy behind a
5694 * nat make sure we don't use it.
5698 initack->init.initiate_tag = htonl(vtag);
5699 /* get a TSN to use too */
5700 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5701 initack->init.initial_tsn = htonl(itsn);
5702 SCTP_TCB_LOCK(stcb);
5703 atomic_add_int(&asoc->refcnt, -1);
5705 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5706 initack->init.initiate_tag = htonl(vtag);
5707 /* get a TSN to use too */
5708 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5710 if (hold_inp_lock) {
5711 SCTP_INP_RLOCK(inp);
5712 SCTP_INP_DECR_REF(inp);
5715 /* save away my tag to */
5716 stc.my_vtag = initack->init.initiate_tag;
5718 /* set up some of the credits. */
5719 so = inp->sctp_socket;
5721 /* memory problem */
5725 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5727 /* set what I want */
5728 his_limit = ntohs(init_chk->init.num_inbound_streams);
5729 /* choose what I want */
5731 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5732 i_want = asoc->streamoutcnt;
5734 i_want = inp->sctp_ep.pre_open_stream_count;
5737 i_want = inp->sctp_ep.pre_open_stream_count;
5739 if (his_limit < i_want) {
5740 /* I Want more :< */
5741 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5743 /* I can have what I want :> */
5744 initack->init.num_outbound_streams = htons(i_want);
5746 /* tell him his limit. */
5747 initack->init.num_inbound_streams =
5748 htons(inp->sctp_ep.max_open_streams_intome);
5750 /* adaptation layer indication parameter */
5751 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5752 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack));
5753 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5754 ali->ph.param_length = htons(sizeof(*ali));
5755 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
5756 SCTP_BUF_LEN(m) += sizeof(*ali);
5757 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
5759 ecn = (struct sctp_ecn_supported_param *)((caddr_t)initack + sizeof(*initack));
5763 if (((asoc != NULL) && (asoc->ecn_allowed == 1)) ||
5764 (inp->sctp_ecn_enable == 1)) {
5765 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
5766 ecn->ph.param_length = htons(sizeof(*ecn));
5767 SCTP_BUF_LEN(m) += sizeof(*ecn);
5769 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
5772 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
5774 /* And now tell the peer we do pr-sctp */
5775 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
5776 prsctp->ph.param_length = htons(sizeof(*prsctp));
5777 SCTP_BUF_LEN(m) += sizeof(*prsctp);
5779 /* Add NAT friendly parameter */
5780 struct sctp_paramhdr *ph;
5782 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5783 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5784 ph->param_length = htons(sizeof(struct sctp_paramhdr));
5785 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
5787 /* And now tell the peer we do all the extensions */
5788 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5789 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5791 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5792 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5793 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5794 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5795 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5796 if (!SCTP_BASE_SYSCTL(sctp_auth_disable))
5797 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5798 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
5799 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5800 p_len = sizeof(*pr_supported) + num_ext;
5801 pr_supported->ph.param_length = htons(p_len);
5802 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
5803 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5805 /* add authentication parameters */
5806 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
5807 struct sctp_auth_random *randp;
5808 struct sctp_auth_hmac_algo *hmacs;
5809 struct sctp_auth_chunk_list *chunks;
5810 uint16_t random_len;
5812 /* generate and add RANDOM parameter */
5813 random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5814 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5815 randp->ph.param_type = htons(SCTP_RANDOM);
5816 p_len = sizeof(*randp) + random_len;
5817 randp->ph.param_length = htons(p_len);
5818 SCTP_READ_RANDOM(randp->random_data, random_len);
5819 /* zero out any padding required */
5820 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
5821 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5823 /* add HMAC_ALGO parameter */
5824 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5825 p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5826 (uint8_t *) hmacs->hmac_ids);
5828 p_len += sizeof(*hmacs);
5829 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5830 hmacs->ph.param_length = htons(p_len);
5831 /* zero out any padding required */
5832 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
5833 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5835 /* add CHUNKS parameter */
5836 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5837 p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5838 chunks->chunk_types);
5840 p_len += sizeof(*chunks);
5841 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5842 chunks->ph.param_length = htons(p_len);
5843 /* zero out any padding required */
5844 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
5845 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5849 /* now the addresses */
5851 struct sctp_scoping scp;
5854 * To optimize this we could put the scoping stuff into a
5855 * structure and remove the individual uint8's from the stc
5856 * structure. Then we could just sifa in the address within
5857 * the stc.. but for now this is a quick hack to get the
5858 * address stuff teased apart.
5860 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5861 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5862 scp.loopback_scope = stc.loopback_scope;
5863 scp.ipv4_local_scope = stc.ipv4_scope;
5864 scp.local_scope = stc.local_scope;
5865 scp.site_scope = stc.site_scope;
5866 m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to, NULL, NULL);
5869 /* tack on the operational error if present */
5878 llen += SCTP_BUF_LEN(ol);
5879 ol = SCTP_BUF_NEXT(ol);
5882 /* must add a pad to the param */
5883 uint32_t cpthis = 0;
5886 padlen = 4 - (llen % 4);
5887 m_copyback(op_err, llen, padlen, (caddr_t)&cpthis);
5889 while (SCTP_BUF_NEXT(m_at) != NULL) {
5890 m_at = SCTP_BUF_NEXT(m_at);
5892 SCTP_BUF_NEXT(m_at) = op_err;
5893 while (SCTP_BUF_NEXT(m_at) != NULL) {
5894 m_at = SCTP_BUF_NEXT(m_at);
5897 /* pre-calulate the size and update pkt header and chunk header */
5899 for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5900 p_len += SCTP_BUF_LEN(m_tmp);
5901 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5902 /* m_tmp should now point to last one */
5907 /* Now we must build a cookie */
5908 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
5909 if (m_cookie == NULL) {
5910 /* memory problem */
5914 /* Now append the cookie to the end and update the space/size */
5915 SCTP_BUF_NEXT(m_tmp) = m_cookie;
5917 for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5918 p_len += SCTP_BUF_LEN(m_tmp);
5919 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5920 /* m_tmp should now point to last one */
5926 * Place in the size, but we don't include the last pad (if any) in
5929 initack->ch.chunk_length = htons(p_len);
5932 * Time to sign the cookie, we don't sign over the cookie signature
5933 * though thus we set trailer.
5935 (void)sctp_hmac_m(SCTP_HMAC,
5936 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
5937 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
5938 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
5940 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
5941 * here since the timer will drive a retranmission.
5944 if ((padval) && (mp_last)) {
5945 /* see my previous comments on mp_last */
5946 if (sctp_add_pad_tombuf(mp_last, (4 - padval))) {
5947 /* Houston we have a problem, no space */
5952 if (stc.loopback_scope) {
5953 over_addr = (union sctp_sockstore *)dst;
5958 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
5960 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
5962 use_mflowid, mflowid,
5963 SCTP_SO_NOT_LOCKED);
5964 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
5969 sctp_prune_prsctp(struct sctp_tcb *stcb,
5970 struct sctp_association *asoc,
5971 struct sctp_sndrcvinfo *srcv,
5975 struct sctp_tmit_chunk *chk, *nchk;
5977 SCTP_TCB_LOCK_ASSERT(stcb);
5978 if ((asoc->peer_supports_prsctp) &&
5979 (asoc->sent_queue_cnt_removeable > 0)) {
5980 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
5982 * Look for chunks marked with the PR_SCTP flag AND
5983 * the buffer space flag. If the one being sent is
5984 * equal or greater priority then purge the old one
5985 * and free some space.
5987 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
5989 * This one is PR-SCTP AND buffer space
5992 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
5994 * Lower numbers equates to higher
5995 * priority so if the one we are
5996 * looking at has a larger or equal
5997 * priority we want to drop the data
5998 * and NOT retransmit it.
6002 * We release the book_size
6003 * if the mbuf is here
6008 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6012 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6015 freed_spc += ret_spc;
6016 if (freed_spc >= dataout) {
6019 } /* if chunk was present */
6020 } /* if of sufficent priority */
6021 } /* if chunk has enabled */
6022 } /* tailqforeach */
6024 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6025 /* Here we must move to the sent queue and mark */
6026 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6027 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6030 * We release the book_size
6031 * if the mbuf is here
6035 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6038 freed_spc += ret_spc;
6039 if (freed_spc >= dataout) {
6042 } /* end if chk->data */
6043 } /* end if right class */
6044 } /* end if chk pr-sctp */
6045 } /* tailqforeachsafe (chk) */
6046 } /* if enabled in asoc */
6050 sctp_get_frag_point(struct sctp_tcb *stcb,
6051 struct sctp_association *asoc)
6056 * For endpoints that have both v6 and v4 addresses we must reserve
6057 * room for the ipv6 header, for those that are only dealing with V4
6058 * we use a larger frag point.
6060 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6061 ovh = SCTP_MED_OVERHEAD;
6063 ovh = SCTP_MED_V4_OVERHEAD;
6066 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6067 siz = asoc->smallest_mtu - ovh;
6069 siz = (stcb->asoc.sctp_frag_point - ovh);
6071 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6073 /* A data chunk MUST fit in a cluster */
6074 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6077 /* adjust for an AUTH chunk if DATA requires auth */
6078 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6079 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6082 /* make it an even word boundary please */
6089 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6092 * We assume that the user wants PR_SCTP_TTL if the user provides a
6093 * positive lifetime but does not specify any PR_SCTP policy.
6095 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6096 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6097 } else if (sp->timetolive > 0) {
6098 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6099 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6103 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6104 case CHUNK_FLAGS_PR_SCTP_BUF:
6106 * Time to live is a priority stored in tv_sec when doing
6107 * the buffer drop thing.
6109 sp->ts.tv_sec = sp->timetolive;
6112 case CHUNK_FLAGS_PR_SCTP_TTL:
6116 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6117 tv.tv_sec = sp->timetolive / 1000;
6118 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6120 * TODO sctp_constants.h needs alternative time
6121 * macros when _KERNEL is undefined.
6123 timevaladd(&sp->ts, &tv);
6126 case CHUNK_FLAGS_PR_SCTP_RTX:
6128 * Time to live is a the number or retransmissions stored in
6131 sp->ts.tv_sec = sp->timetolive;
6135 SCTPDBG(SCTP_DEBUG_USRREQ1,
6136 "Unknown PR_SCTP policy %u.\n",
6137 PR_SCTP_POLICY(sp->sinfo_flags));
6143 sctp_msg_append(struct sctp_tcb *stcb,
6144 struct sctp_nets *net,
6146 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6150 struct sctp_stream_queue_pending *sp = NULL;
6151 struct sctp_stream_out *strm;
6154 * Given an mbuf chain, put it into the association send queue and
6155 * place it on the wheel
6157 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6158 /* Invalid stream number */
6159 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6163 if ((stcb->asoc.stream_locked) &&
6164 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6165 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6169 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6170 /* Now can we send this? */
6171 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6172 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6173 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6174 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6175 /* got data while shutting down */
6176 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6180 sctp_alloc_a_strmoq(stcb, sp);
6182 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6186 sp->sinfo_flags = srcv->sinfo_flags;
6187 sp->timetolive = srcv->sinfo_timetolive;
6188 sp->ppid = srcv->sinfo_ppid;
6189 sp->context = srcv->sinfo_context;
6190 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6192 atomic_add_int(&sp->net->ref_count, 1);
6196 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6197 sp->stream = srcv->sinfo_stream;
6198 sp->msg_is_complete = 1;
6199 sp->sender_all_done = 1;
6202 sp->tail_mbuf = NULL;
6203 sctp_set_prsctp_policy(sp);
6205 * We could in theory (for sendall) sifa the length in, but we would
6206 * still have to hunt through the chain since we need to setup the
6210 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6211 if (SCTP_BUF_NEXT(at) == NULL)
6213 sp->length += SCTP_BUF_LEN(at);
6215 if (srcv->sinfo_keynumber_valid) {
6216 sp->auth_keyid = srcv->sinfo_keynumber;
6218 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6220 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6221 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6222 sp->holds_key_ref = 1;
6224 if (hold_stcb_lock == 0) {
6225 SCTP_TCB_SEND_LOCK(stcb);
6227 sctp_snd_sb_alloc(stcb, sp->length);
6228 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6229 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6230 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6232 if (hold_stcb_lock == 0) {
6233 SCTP_TCB_SEND_UNLOCK(stcb);
6243 static struct mbuf *
6244 sctp_copy_mbufchain(struct mbuf *clonechain,
6245 struct mbuf *outchain,
6246 struct mbuf **endofchain,
6249 uint8_t copy_by_ref)
6252 struct mbuf *appendchain;
6256 if (endofchain == NULL) {
6260 sctp_m_freem(outchain);
6263 if (can_take_mbuf) {
6264 appendchain = clonechain;
6267 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6269 /* Its not in a cluster */
6270 if (*endofchain == NULL) {
6271 /* lets get a mbuf cluster */
6272 if (outchain == NULL) {
6273 /* This is the general case */
6275 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6276 if (outchain == NULL) {
6279 SCTP_BUF_LEN(outchain) = 0;
6280 *endofchain = outchain;
6281 /* get the prepend space */
6282 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6285 * We really should not get a NULL
6291 if (SCTP_BUF_NEXT(m) == NULL) {
6295 m = SCTP_BUF_NEXT(m);
6298 if (*endofchain == NULL) {
6300 * huh, TSNH XXX maybe we
6303 sctp_m_freem(outchain);
6307 /* get the new end of length */
6308 len = M_TRAILINGSPACE(*endofchain);
6310 /* how much is left at the end? */
6311 len = M_TRAILINGSPACE(*endofchain);
6313 /* Find the end of the data, for appending */
6314 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6316 /* Now lets copy it out */
6317 if (len >= sizeofcpy) {
6318 /* It all fits, copy it in */
6319 m_copydata(clonechain, 0, sizeofcpy, cp);
6320 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6322 /* fill up the end of the chain */
6324 m_copydata(clonechain, 0, len, cp);
6325 SCTP_BUF_LEN((*endofchain)) += len;
6326 /* now we need another one */
6329 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6334 SCTP_BUF_NEXT((*endofchain)) = m;
6336 cp = mtod((*endofchain), caddr_t);
6337 m_copydata(clonechain, len, sizeofcpy, cp);
6338 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6342 /* copy the old fashion way */
6343 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6344 #ifdef SCTP_MBUF_LOGGING
6345 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6348 for (mat = appendchain; mat; mat = SCTP_BUF_NEXT(mat)) {
6349 if (SCTP_BUF_IS_EXTENDED(mat)) {
6350 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6357 if (appendchain == NULL) {
6360 sctp_m_freem(outchain);
6364 /* tack on to the end */
6365 if (*endofchain != NULL) {
6366 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6370 if (SCTP_BUF_NEXT(m) == NULL) {
6371 SCTP_BUF_NEXT(m) = appendchain;
6374 m = SCTP_BUF_NEXT(m);
6378 * save off the end and update the end-chain postion
6382 if (SCTP_BUF_NEXT(m) == NULL) {
6386 m = SCTP_BUF_NEXT(m);
6390 /* save off the end and update the end-chain postion */
6393 if (SCTP_BUF_NEXT(m) == NULL) {
6397 m = SCTP_BUF_NEXT(m);
6399 return (appendchain);
6404 sctp_med_chunk_output(struct sctp_inpcb *inp,
6405 struct sctp_tcb *stcb,
6406 struct sctp_association *asoc,
6409 int control_only, int from_where,
6410 struct timeval *now, int *now_filled, int frag_point, int so_locked
6411 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6417 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6418 uint32_t val SCTP_UNUSED)
6420 struct sctp_copy_all *ca;
6423 int added_control = 0;
6424 int un_sent, do_chunk_output = 1;
6425 struct sctp_association *asoc;
6426 struct sctp_nets *net;
6428 ca = (struct sctp_copy_all *)ptr;
6429 if (ca->m == NULL) {
6432 if (ca->inp != inp) {
6436 if (ca->sndlen > 0) {
6437 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6439 /* can't copy so we are done */
6443 #ifdef SCTP_MBUF_LOGGING
6444 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6447 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6448 if (SCTP_BUF_IS_EXTENDED(mat)) {
6449 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6457 SCTP_TCB_LOCK_ASSERT(stcb);
6458 if (stcb->asoc.alternate) {
6459 net = stcb->asoc.alternate;
6461 net = stcb->asoc.primary_destination;
6463 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6464 /* Abort this assoc with m as the user defined reason */
6466 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6468 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6469 0, M_NOWAIT, 1, MT_DATA);
6470 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6473 struct sctp_paramhdr *ph;
6475 ph = mtod(m, struct sctp_paramhdr *);
6476 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6477 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
6480 * We add one here to keep the assoc from dis-appearing on
6483 atomic_add_int(&stcb->asoc.refcnt, 1);
6484 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6486 * sctp_abort_an_association calls sctp_free_asoc() free
6487 * association will NOT free it since we incremented the
6488 * refcnt .. we do this to prevent it being freed and things
6489 * getting tricky since we could end up (from free_asoc)
6490 * calling inpcb_free which would get a recursive lock call
6491 * to the iterator lock.. But as a consequence of that the
6492 * stcb will return to us un-locked.. since free_asoc
6493 * returns with either no TCB or the TCB unlocked, we must
6494 * relock.. to unlock in the iterator timer :-0
6496 SCTP_TCB_LOCK(stcb);
6497 atomic_add_int(&stcb->asoc.refcnt, -1);
6498 goto no_chunk_output;
6501 ret = sctp_msg_append(stcb, net, m,
6505 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6506 /* shutdown this assoc */
6509 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6511 if (TAILQ_EMPTY(&asoc->send_queue) &&
6512 TAILQ_EMPTY(&asoc->sent_queue) &&
6514 if (asoc->locked_on_sending) {
6518 * there is nothing queued to send, so I'm
6521 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6522 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6523 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6525 * only send SHUTDOWN the first time
6528 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6529 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6531 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6532 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6533 sctp_stop_timers_for_shutdown(stcb);
6534 sctp_send_shutdown(stcb, net);
6535 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6537 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6538 asoc->primary_destination);
6540 do_chunk_output = 0;
6544 * we still got (or just got) data to send,
6545 * so set SHUTDOWN_PENDING
6548 * XXX sockets draft says that SCTP_EOF
6549 * should be sent with no data. currently,
6550 * we will allow user data to be sent first
6551 * and move to SHUTDOWN-PENDING
6553 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6554 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6555 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6556 if (asoc->locked_on_sending) {
6558 * Locked to send out the
6561 struct sctp_stream_queue_pending *sp;
6563 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6565 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6566 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6569 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6570 if (TAILQ_EMPTY(&asoc->send_queue) &&
6571 TAILQ_EMPTY(&asoc->sent_queue) &&
6572 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6574 atomic_add_int(&stcb->asoc.refcnt, 1);
6575 sctp_abort_an_association(stcb->sctp_ep, stcb,
6576 NULL, SCTP_SO_NOT_LOCKED);
6577 atomic_add_int(&stcb->asoc.refcnt, -1);
6578 goto no_chunk_output;
6580 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6581 asoc->primary_destination);
6587 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6588 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6590 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6591 (stcb->asoc.total_flight > 0) &&
6592 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6593 do_chunk_output = 0;
6595 if (do_chunk_output)
6596 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6597 else if (added_control) {
6598 int num_out = 0, reason = 0, now_filled = 0;
6602 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6603 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6604 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6615 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6617 struct sctp_copy_all *ca;
6619 ca = (struct sctp_copy_all *)ptr;
6621 * Do a notify here? Kacheong suggests that the notify be done at
6622 * the send time.. so you would push up a notification if any send
6623 * failed. Don't know if this is feasable since the only failures we
6624 * have is "memory" related and if you cannot get an mbuf to send
6625 * the data you surely can't get an mbuf to send up to notify the
6626 * user you can't send the data :->
6629 /* now free everything */
6630 sctp_m_freem(ca->m);
6631 SCTP_FREE(ca, SCTP_M_COPYAL);
6635 #define MC_ALIGN(m, len) do { \
6636 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \
6641 static struct mbuf *
6642 sctp_copy_out_all(struct uio *uio, int len)
6644 struct mbuf *ret, *at;
6645 int left, willcpy, cancpy, error;
6647 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6653 SCTP_BUF_LEN(ret) = 0;
6654 /* save space for the data chunk header */
6655 cancpy = M_TRAILINGSPACE(ret);
6656 willcpy = min(cancpy, left);
6659 /* Align data to the end */
6660 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6666 SCTP_BUF_LEN(at) = willcpy;
6667 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6670 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6671 if (SCTP_BUF_NEXT(at) == NULL) {
6674 at = SCTP_BUF_NEXT(at);
6675 SCTP_BUF_LEN(at) = 0;
6676 cancpy = M_TRAILINGSPACE(at);
6677 willcpy = min(cancpy, left);
6684 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6685 struct sctp_sndrcvinfo *srcv)
6688 struct sctp_copy_all *ca;
6690 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6694 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6697 memset(ca, 0, sizeof(struct sctp_copy_all));
6701 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6704 * take off the sendall flag, it would be bad if we failed to do
6707 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6708 /* get length and mbuf chain */
6710 ca->sndlen = uio->uio_resid;
6711 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6712 if (ca->m == NULL) {
6713 SCTP_FREE(ca, SCTP_M_COPYAL);
6714 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6718 /* Gather the length of the send */
6722 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6723 ca->sndlen += SCTP_BUF_LEN(mat);
6726 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6727 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6728 SCTP_ASOC_ANY_STATE,
6730 sctp_sendall_completes, inp, 1);
6732 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6733 SCTP_FREE(ca, SCTP_M_COPYAL);
6734 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6742 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6744 struct sctp_tmit_chunk *chk, *nchk;
6746 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6747 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6748 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6750 sctp_m_freem(chk->data);
6753 asoc->ctrl_queue_cnt--;
6754 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6760 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6762 struct sctp_association *asoc;
6763 struct sctp_tmit_chunk *chk, *nchk;
6764 struct sctp_asconf_chunk *acp;
6767 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6768 /* find SCTP_ASCONF chunk in queue */
6769 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6771 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6772 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6777 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6779 sctp_m_freem(chk->data);
6782 asoc->ctrl_queue_cnt--;
6783 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6790 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6791 struct sctp_association *asoc,
6792 struct sctp_tmit_chunk **data_list,
6794 struct sctp_nets *net)
6797 struct sctp_tmit_chunk *tp1;
6799 for (i = 0; i < bundle_at; i++) {
6800 /* off of the send queue */
6801 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6802 asoc->send_queue_cnt--;
6805 * Any chunk NOT 0 you zap the time chunk 0 gets
6806 * zapped or set based on if a RTO measurment is
6809 data_list[i]->do_rtt = 0;
6812 data_list[i]->sent_rcv_time = net->last_sent_time;
6813 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6814 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6815 if (data_list[i]->whoTo == NULL) {
6816 data_list[i]->whoTo = net;
6817 atomic_add_int(&net->ref_count, 1);
6819 /* on to the sent queue */
6820 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6821 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6822 struct sctp_tmit_chunk *tpp;
6824 /* need to move back */
6826 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6828 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6832 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6835 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6837 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6842 /* This does not lower until the cum-ack passes it */
6843 asoc->sent_queue_cnt++;
6844 if ((asoc->peers_rwnd <= 0) &&
6845 (asoc->total_flight == 0) &&
6847 /* Mark the chunk as being a window probe */
6848 SCTP_STAT_INCR(sctps_windowprobed);
6850 #ifdef SCTP_AUDITING_ENABLED
6851 sctp_audit_log(0xC2, 3);
6853 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6854 data_list[i]->snd_count = 1;
6855 data_list[i]->rec.data.chunk_was_revoked = 0;
6856 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6857 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6858 data_list[i]->whoTo->flight_size,
6859 data_list[i]->book_size,
6860 (uintptr_t) data_list[i]->whoTo,
6861 data_list[i]->rec.data.TSN_seq);
6863 sctp_flight_size_increase(data_list[i]);
6864 sctp_total_flight_increase(stcb, data_list[i]);
6865 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6866 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6867 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6869 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6870 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6871 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6872 /* SWS sender side engages */
6873 asoc->peers_rwnd = 0;
6876 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6877 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
6882 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
6883 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6888 struct sctp_tmit_chunk *chk, *nchk;
6890 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6891 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
6892 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
6893 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
6894 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
6895 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
6896 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
6897 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
6898 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
6899 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
6900 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
6901 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
6902 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
6903 /* Stray chunks must be cleaned up */
6905 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6907 sctp_m_freem(chk->data);
6910 asoc->ctrl_queue_cnt--;
6911 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
6912 asoc->fwd_tsn_cnt--;
6913 sctp_free_a_chunk(stcb, chk, so_locked);
6914 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
6915 /* special handling, we must look into the param */
6916 if (chk != asoc->str_reset) {
6917 goto clean_up_anyway;
6925 sctp_can_we_split_this(struct sctp_tcb *stcb,
6927 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
6930 * Make a decision on if I should split a msg into multiple parts.
6931 * This is only asked of incomplete messages.
6935 * If we are doing EEOR we need to always send it if its the
6936 * entire thing, since it might be all the guy is putting in
6939 if (goal_mtu >= length) {
6941 * If we have data outstanding,
6942 * we get another chance when the sack
6943 * arrives to transmit - wait for more data
6945 if (stcb->asoc.total_flight == 0) {
6947 * If nothing is in flight, we zero the
6955 /* You can fill the rest */
6960 * For those strange folk that make the send buffer
6961 * smaller than our fragmentation point, we can't
6962 * get a full msg in so we have to allow splitting.
6964 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
6967 if ((length <= goal_mtu) ||
6968 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
6969 /* Sub-optimial residual don't split in non-eeor mode. */
6973 * If we reach here length is larger than the goal_mtu. Do we wish
6974 * to split it for the sake of packet putting together?
6976 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
6977 /* Its ok to split it */
6978 return (min(goal_mtu, frag_point));
6980 /* Nope, can't split */
6986 sctp_move_to_outqueue(struct sctp_tcb *stcb,
6987 struct sctp_stream_out *strq,
6989 uint32_t frag_point,
6995 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7000 /* Move from the stream to the send_queue keeping track of the total */
7001 struct sctp_association *asoc;
7002 struct sctp_stream_queue_pending *sp;
7003 struct sctp_tmit_chunk *chk;
7004 struct sctp_data_chunk *dchkh;
7005 uint32_t to_move, length;
7006 uint8_t rcv_flags = 0;
7008 uint8_t send_lock_up = 0;
7010 SCTP_TCB_LOCK_ASSERT(stcb);
7013 /* sa_ignore FREED_MEMORY */
7014 sp = TAILQ_FIRST(&strq->outqueue);
7017 if (send_lock_up == 0) {
7018 SCTP_TCB_SEND_LOCK(stcb);
7021 sp = TAILQ_FIRST(&strq->outqueue);
7025 if (strq->last_msg_incomplete) {
7026 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7028 strq->last_msg_incomplete);
7029 strq->last_msg_incomplete = 0;
7033 SCTP_TCB_SEND_UNLOCK(stcb);
7038 if ((sp->msg_is_complete) && (sp->length == 0)) {
7039 if (sp->sender_all_done) {
7041 * We are doing differed cleanup. Last time through
7042 * when we took all the data the sender_all_done was
7045 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7046 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7047 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7048 sp->sender_all_done,
7050 sp->msg_is_complete,
7054 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7055 SCTP_TCB_SEND_LOCK(stcb);
7058 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7059 TAILQ_REMOVE(&strq->outqueue, sp, next);
7060 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7062 sctp_free_remote_addr(sp->net);
7066 sctp_m_freem(sp->data);
7069 sctp_free_a_strmoq(stcb, sp, so_locked);
7070 /* we can't be locked to it */
7072 stcb->asoc.locked_on_sending = NULL;
7074 SCTP_TCB_SEND_UNLOCK(stcb);
7077 /* back to get the next msg */
7081 * sender just finished this but still holds a
7090 /* is there some to get */
7091 if (sp->length == 0) {
7097 } else if (sp->discard_rest) {
7098 if (send_lock_up == 0) {
7099 SCTP_TCB_SEND_LOCK(stcb);
7102 /* Whack down the size */
7103 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7104 if ((stcb->sctp_socket != NULL) && \
7105 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7106 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7107 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7110 sctp_m_freem(sp->data);
7112 sp->tail_mbuf = NULL;
7122 some_taken = sp->some_taken;
7123 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7124 sp->msg_is_complete = 1;
7127 length = sp->length;
7128 if (sp->msg_is_complete) {
7129 /* The message is complete */
7130 to_move = min(length, frag_point);
7131 if (to_move == length) {
7132 /* All of it fits in the MTU */
7133 if (sp->some_taken) {
7134 rcv_flags |= SCTP_DATA_LAST_FRAG;
7135 sp->put_last_out = 1;
7137 rcv_flags |= SCTP_DATA_NOT_FRAG;
7138 sp->put_last_out = 1;
7141 /* Not all of it fits, we fragment */
7142 if (sp->some_taken == 0) {
7143 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7148 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7151 * We use a snapshot of length in case it
7152 * is expanding during the compare.
7157 if (to_move >= llen) {
7159 if (send_lock_up == 0) {
7161 * We are taking all of an incomplete msg
7162 * thus we need a send lock.
7164 SCTP_TCB_SEND_LOCK(stcb);
7166 if (sp->msg_is_complete) {
7168 * the sender finished the
7175 if (sp->some_taken == 0) {
7176 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7180 /* Nothing to take. */
7181 if (sp->some_taken) {
7190 /* If we reach here, we can copy out a chunk */
7191 sctp_alloc_a_chunk(stcb, chk);
7193 /* No chunk memory */
7199 * Setup for unordered if needed by looking at the user sent info
7202 if (sp->sinfo_flags & SCTP_UNORDERED) {
7203 rcv_flags |= SCTP_DATA_UNORDERED;
7205 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7206 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7207 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7209 /* clear out the chunk before setting up */
7210 memset(chk, 0, sizeof(*chk));
7211 chk->rec.data.rcv_flags = rcv_flags;
7213 if (to_move >= length) {
7214 /* we think we can steal the whole thing */
7215 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7216 SCTP_TCB_SEND_LOCK(stcb);
7219 if (to_move < sp->length) {
7220 /* bail, it changed */
7223 chk->data = sp->data;
7224 chk->last_mbuf = sp->tail_mbuf;
7225 /* register the stealing */
7226 sp->data = sp->tail_mbuf = NULL;
7231 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7232 chk->last_mbuf = NULL;
7233 if (chk->data == NULL) {
7234 sp->some_taken = some_taken;
7235 sctp_free_a_chunk(stcb, chk, so_locked);
7240 #ifdef SCTP_MBUF_LOGGING
7241 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7244 for (mat = chk->data; mat; mat = SCTP_BUF_NEXT(mat)) {
7245 if (SCTP_BUF_IS_EXTENDED(mat)) {
7246 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
7251 /* Pull off the data */
7252 m_adj(sp->data, to_move);
7253 /* Now lets work our way down and compact it */
7255 while (m && (SCTP_BUF_LEN(m) == 0)) {
7256 sp->data = SCTP_BUF_NEXT(m);
7257 SCTP_BUF_NEXT(m) = NULL;
7258 if (sp->tail_mbuf == m) {
7260 * Freeing tail? TSNH since
7261 * we supposedly were taking less
7262 * than the sp->length.
7265 panic("Huh, freing tail? - TSNH");
7267 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7268 sp->tail_mbuf = sp->data = NULL;
7277 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7278 chk->copy_by_ref = 1;
7280 chk->copy_by_ref = 0;
7283 * get last_mbuf and counts of mb useage This is ugly but hopefully
7284 * its only one mbuf.
7286 if (chk->last_mbuf == NULL) {
7287 chk->last_mbuf = chk->data;
7288 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7289 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7292 if (to_move > length) {
7293 /*- This should not happen either
7294 * since we always lower to_move to the size
7295 * of sp->length if its larger.
7298 panic("Huh, how can to_move be larger?");
7300 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7304 atomic_subtract_int(&sp->length, to_move);
7306 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7307 /* Not enough room for a chunk header, get some */
7310 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7313 * we're in trouble here. _PREPEND below will free
7314 * all the data if there is no leading space, so we
7315 * must put the data back and restore.
7317 if (send_lock_up == 0) {
7318 SCTP_TCB_SEND_LOCK(stcb);
7321 if (chk->data == NULL) {
7322 /* unsteal the data */
7323 sp->data = chk->data;
7324 sp->tail_mbuf = chk->last_mbuf;
7328 /* reassemble the data */
7330 sp->data = chk->data;
7331 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7333 sp->some_taken = some_taken;
7334 atomic_add_int(&sp->length, to_move);
7337 sctp_free_a_chunk(stcb, chk, so_locked);
7341 SCTP_BUF_LEN(m) = 0;
7342 SCTP_BUF_NEXT(m) = chk->data;
7344 M_ALIGN(chk->data, 4);
7347 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
7348 if (chk->data == NULL) {
7349 /* HELP, TSNH since we assured it would not above? */
7351 panic("prepend failes HELP?");
7353 SCTP_PRINTF("prepend fails HELP?\n");
7354 sctp_free_a_chunk(stcb, chk, so_locked);
7360 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7361 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7362 chk->book_size_scale = 0;
7363 chk->sent = SCTP_DATAGRAM_UNSENT;
7366 chk->asoc = &stcb->asoc;
7367 chk->pad_inplace = 0;
7368 chk->no_fr_allowed = 0;
7369 chk->rec.data.stream_seq = strq->next_sequence_send;
7370 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7371 strq->next_sequence_send++;
7373 chk->rec.data.stream_number = sp->stream;
7374 chk->rec.data.payloadtype = sp->ppid;
7375 chk->rec.data.context = sp->context;
7376 chk->rec.data.doing_fast_retransmit = 0;
7378 chk->rec.data.timetodrop = sp->ts;
7379 chk->flags = sp->act_flags;
7382 chk->whoTo = sp->net;
7383 atomic_add_int(&chk->whoTo->ref_count, 1);
7387 if (sp->holds_key_ref) {
7388 chk->auth_keyid = sp->auth_keyid;
7389 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7390 chk->holds_key_ref = 1;
7392 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7393 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7394 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7395 (uintptr_t) stcb, sp->length,
7396 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7397 chk->rec.data.TSN_seq);
7399 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7401 * Put the rest of the things in place now. Size was done earlier in
7402 * previous loop prior to padding.
7405 #ifdef SCTP_ASOCLOG_OF_TSNS
7406 SCTP_TCB_LOCK_ASSERT(stcb);
7407 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7408 asoc->tsn_out_at = 0;
7409 asoc->tsn_out_wrapped = 1;
7411 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7412 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7413 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7414 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7415 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7416 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7417 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7418 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7422 dchkh->ch.chunk_type = SCTP_DATA;
7423 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7424 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7425 dchkh->dp.stream_id = htons(strq->stream_no);
7426 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7427 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7428 dchkh->ch.chunk_length = htons(chk->send_size);
7429 /* Now advance the chk->send_size by the actual pad needed. */
7430 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7435 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7436 if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) {
7437 chk->pad_inplace = 1;
7439 if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) {
7440 /* pad added an mbuf */
7441 chk->last_mbuf = lm;
7443 chk->send_size += pads;
7445 if (PR_SCTP_ENABLED(chk->flags)) {
7446 asoc->pr_sctp_cnt++;
7448 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7449 /* All done pull and kill the message */
7450 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7451 if (sp->put_last_out == 0) {
7452 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7453 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7454 sp->sender_all_done,
7456 sp->msg_is_complete,
7460 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7461 SCTP_TCB_SEND_LOCK(stcb);
7464 TAILQ_REMOVE(&strq->outqueue, sp, next);
7465 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7467 sctp_free_remote_addr(sp->net);
7471 sctp_m_freem(sp->data);
7474 sctp_free_a_strmoq(stcb, sp, so_locked);
7476 /* we can't be locked to it */
7478 stcb->asoc.locked_on_sending = NULL;
7480 /* more to go, we are locked */
7483 asoc->chunks_on_out_queue++;
7484 strq->chunks_on_queues++;
7485 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7486 asoc->send_queue_cnt++;
7489 SCTP_TCB_SEND_UNLOCK(stcb);
7496 sctp_fill_outqueue(struct sctp_tcb *stcb,
7497 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7498 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7503 struct sctp_association *asoc;
7504 struct sctp_stream_out *strq;
7505 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7508 SCTP_TCB_LOCK_ASSERT(stcb);
7510 switch (net->ro._l_addr.sa.sa_family) {
7513 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7518 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7523 goal_mtu = net->mtu;
7526 /* Need an allowance for the data chunk header too */
7527 goal_mtu -= sizeof(struct sctp_data_chunk);
7529 /* must make even word boundary */
7530 goal_mtu &= 0xfffffffc;
7531 if (asoc->locked_on_sending) {
7532 /* We are stuck on one stream until the message completes. */
7533 strq = asoc->locked_on_sending;
7536 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7539 while ((goal_mtu > 0) && strq) {
7542 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7543 &giveup, eeor_mode, &bail, so_locked);
7545 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7548 asoc->locked_on_sending = strq;
7549 if ((moved_how_much == 0) || (giveup) || bail)
7550 /* no more to move for now */
7553 asoc->locked_on_sending = NULL;
7554 if ((giveup) || bail) {
7557 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7562 total_moved += moved_how_much;
7563 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7564 goal_mtu &= 0xfffffffc;
7569 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7571 if (total_moved == 0) {
7572 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7573 (net == stcb->asoc.primary_destination)) {
7574 /* ran dry for primary network net */
7575 SCTP_STAT_INCR(sctps_primary_randry);
7576 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7577 /* ran dry with CMT on */
7578 SCTP_STAT_INCR(sctps_cmt_randry);
7584 sctp_fix_ecn_echo(struct sctp_association *asoc)
7586 struct sctp_tmit_chunk *chk;
7588 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7589 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7590 chk->sent = SCTP_DATAGRAM_UNSENT;
7596 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7598 struct sctp_association *asoc;
7599 struct sctp_tmit_chunk *chk;
7600 struct sctp_stream_queue_pending *sp;
7607 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7608 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7609 if (sp->net == net) {
7610 sctp_free_remote_addr(sp->net);
7615 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7616 if (chk->whoTo == net) {
7617 sctp_free_remote_addr(chk->whoTo);
7624 sctp_med_chunk_output(struct sctp_inpcb *inp,
7625 struct sctp_tcb *stcb,
7626 struct sctp_association *asoc,
7629 int control_only, int from_where,
7630 struct timeval *now, int *now_filled, int frag_point, int so_locked
7631 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7637 * Ok this is the generic chunk service queue. we must do the
7638 * following: - Service the stream queue that is next, moving any
7639 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7640 * LAST to the out queue in one pass) and assigning TSN's - Check to
7641 * see if the cwnd/rwnd allows any output, if so we go ahead and
7642 * fomulate and send the low level chunks. Making sure to combine
7643 * any control in the control chunk queue also.
7645 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7646 struct mbuf *outchain, *endoutchain;
7647 struct sctp_tmit_chunk *chk, *nchk;
7649 /* temp arrays for unlinking */
7650 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7651 int no_fragmentflg, error;
7652 unsigned int max_rwnd_per_dest, max_send_per_dest;
7653 int one_chunk, hbflag, skip_data_for_this_net;
7654 int asconf, cookie, no_out_cnt;
7655 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7656 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7658 uint32_t auth_offset = 0;
7659 struct sctp_auth_chunk *auth = NULL;
7660 uint16_t auth_keyid;
7661 int override_ok = 1;
7662 int skip_fill_up = 0;
7663 int data_auth_reqd = 0;
7666 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7672 auth_keyid = stcb->asoc.authinfo.active_keyid;
7674 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7675 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7676 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7681 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7683 * First lets prime the pump. For each destination, if there is room
7684 * in the flight size, attempt to pull an MTU's worth out of the
7685 * stream queues into the general send_queue
7687 #ifdef SCTP_AUDITING_ENABLED
7688 sctp_audit_log(0xC2, 2);
7690 SCTP_TCB_LOCK_ASSERT(stcb);
7692 if ((control_only) || (asoc->stream_reset_outstanding))
7697 /* Nothing to possible to send? */
7698 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7699 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7700 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7701 TAILQ_EMPTY(&asoc->send_queue) &&
7702 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7707 if (asoc->peers_rwnd == 0) {
7708 /* No room in peers rwnd */
7710 if (asoc->total_flight > 0) {
7711 /* we are allowed one chunk in flight */
7715 if (stcb->asoc.ecn_echo_cnt_onq) {
7716 /* Record where a sack goes, if any */
7717 if (no_data_chunks &&
7718 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7719 /* Nothing but ECNe to send - we don't do that */
7720 goto nothing_to_send;
7722 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7723 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7724 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7725 sack_goes_to = chk->whoTo;
7730 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7731 if (stcb->sctp_socket)
7732 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7734 max_send_per_dest = 0;
7735 if (no_data_chunks == 0) {
7736 /* How many non-directed chunks are there? */
7737 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7738 if (chk->whoTo == NULL) {
7740 * We already have non-directed chunks on
7741 * the queue, no need to do a fill-up.
7749 if ((no_data_chunks == 0) &&
7750 (skip_fill_up == 0) &&
7751 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7752 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7754 * This for loop we are in takes in each net, if
7755 * its's got space in cwnd and has data sent to it
7756 * (when CMT is off) then it calls
7757 * sctp_fill_outqueue for the net. This gets data on
7758 * the send queue for that network.
7760 * In sctp_fill_outqueue TSN's are assigned and data is
7761 * copied out of the stream buffers. Note mostly
7762 * copy by reference (we hope).
7764 net->window_probe = 0;
7765 if ((net != stcb->asoc.alternate) &&
7766 ((net->dest_state & SCTP_ADDR_PF) ||
7767 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7768 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7769 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7770 sctp_log_cwnd(stcb, net, 1,
7771 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7775 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7776 (net->flight_size == 0)) {
7777 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7779 if (net->flight_size >= net->cwnd) {
7780 /* skip this network, no room - can't fill */
7781 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7782 sctp_log_cwnd(stcb, net, 3,
7783 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7787 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7788 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7790 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7792 /* memory alloc failure */
7798 /* now service each destination and send out what we can for it */
7799 /* Nothing to send? */
7800 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7801 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7802 TAILQ_EMPTY(&asoc->send_queue)) {
7806 if (asoc->sctp_cmt_on_off > 0) {
7807 /* get the last start point */
7808 start_at = asoc->last_net_cmt_send_started;
7809 if (start_at == NULL) {
7810 /* null so to beginning */
7811 start_at = TAILQ_FIRST(&asoc->nets);
7813 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7814 if (start_at == NULL) {
7815 start_at = TAILQ_FIRST(&asoc->nets);
7818 asoc->last_net_cmt_send_started = start_at;
7820 start_at = TAILQ_FIRST(&asoc->nets);
7822 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7823 if (chk->whoTo == NULL) {
7824 if (asoc->alternate) {
7825 chk->whoTo = asoc->alternate;
7827 chk->whoTo = asoc->primary_destination;
7829 atomic_add_int(&chk->whoTo->ref_count, 1);
7832 old_start_at = NULL;
7833 again_one_more_time:
7834 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7835 /* how much can we send? */
7836 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7837 if (old_start_at && (old_start_at == net)) {
7838 /* through list ocmpletely. */
7842 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7843 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7844 (net->flight_size >= net->cwnd)) {
7846 * Nothing on control or asconf and flight is full,
7847 * we can skip even in the CMT case.
7852 endoutchain = outchain = NULL;
7855 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7856 skip_data_for_this_net = 1;
7858 skip_data_for_this_net = 0;
7860 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7862 * if we have a route and an ifp check to see if we
7863 * have room to send to this guy
7867 ifp = net->ro.ro_rt->rt_ifp;
7868 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
7869 SCTP_STAT_INCR(sctps_ifnomemqueued);
7870 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
7871 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
7876 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7879 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
7884 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
7894 if (mtu > asoc->peers_rwnd) {
7895 if (asoc->total_flight > 0) {
7896 /* We have a packet in flight somewhere */
7897 r_mtu = asoc->peers_rwnd;
7899 /* We are always allowed to send one MTU out */
7906 /************************/
7907 /* ASCONF transmission */
7908 /************************/
7909 /* Now first lets go through the asconf queue */
7910 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
7911 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
7914 if (chk->whoTo == NULL) {
7915 if (asoc->alternate == NULL) {
7916 if (asoc->primary_destination != net) {
7920 if (asoc->alternate != net) {
7925 if (chk->whoTo != net) {
7929 if (chk->data == NULL) {
7932 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
7933 chk->sent != SCTP_DATAGRAM_RESEND) {
7937 * if no AUTH is yet included and this chunk
7938 * requires it, make sure to account for it. We
7939 * don't apply the size until the AUTH chunk is
7940 * actually added below in case there is no room for
7941 * this chunk. NOTE: we overload the use of "omtu"
7944 if ((auth == NULL) &&
7945 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
7946 stcb->asoc.peer_auth_chunks)) {
7947 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
7950 /* Here we do NOT factor the r_mtu */
7951 if ((chk->send_size < (int)(mtu - omtu)) ||
7952 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
7954 * We probably should glom the mbuf chain
7955 * from the chk->data for control but the
7956 * problem is it becomes yet one more level
7957 * of tracking to do if for some reason
7958 * output fails. Then I have got to
7959 * reconstruct the merged control chain.. el
7960 * yucko.. for now we take the easy way and
7964 * Add an AUTH chunk, if chunk requires it
7965 * save the offset into the chain for AUTH
7967 if ((auth == NULL) &&
7968 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
7969 stcb->asoc.peer_auth_chunks))) {
7970 outchain = sctp_add_auth_chunk(outchain,
7975 chk->rec.chunk_id.id);
7976 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
7978 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
7979 (int)chk->rec.chunk_id.can_take_data,
7980 chk->send_size, chk->copy_by_ref);
7981 if (outchain == NULL) {
7983 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
7986 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
7987 /* update our MTU size */
7988 if (mtu > (chk->send_size + omtu))
7989 mtu -= (chk->send_size + omtu);
7992 to_out += (chk->send_size + omtu);
7993 /* Do clear IP_DF ? */
7994 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
7997 if (chk->rec.chunk_id.can_take_data)
8000 * set hb flag since we can use these for
8006 * should sysctl this: don't bundle data
8007 * with ASCONF since it requires AUTH
8010 chk->sent = SCTP_DATAGRAM_SENT;
8011 if (chk->whoTo == NULL) {
8013 atomic_add_int(&net->ref_count, 1);
8018 * Ok we are out of room but we can
8019 * output without effecting the
8020 * flight size since this little guy
8021 * is a control only packet.
8023 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8025 * do NOT clear the asconf flag as
8026 * it is used to do appropriate
8027 * source address selection.
8029 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8030 (struct sockaddr *)&net->ro._l_addr,
8031 outchain, auth_offset, auth,
8032 stcb->asoc.authinfo.active_keyid,
8033 no_fragmentflg, 0, asconf,
8034 inp->sctp_lport, stcb->rport,
8035 htonl(stcb->asoc.peer_vtag),
8039 if (error == ENOBUFS) {
8040 asoc->ifp_had_enobuf = 1;
8041 SCTP_STAT_INCR(sctps_lowlevelerr);
8043 if (from_where == 0) {
8044 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8046 if (*now_filled == 0) {
8047 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8049 *now = net->last_sent_time;
8051 net->last_sent_time = *now;
8054 /* error, could not output */
8055 if (error == EHOSTUNREACH) {
8061 sctp_move_chunks_from_net(stcb, net);
8066 asoc->ifp_had_enobuf = 0;
8067 if (*now_filled == 0) {
8068 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8070 *now = net->last_sent_time;
8072 net->last_sent_time = *now;
8076 * increase the number we sent, if a
8077 * cookie is sent we don't tell them
8080 outchain = endoutchain = NULL;
8084 *num_out += ctl_cnt;
8085 /* recalc a clean slate and setup */
8086 switch (net->ro._l_addr.sa.sa_family) {
8089 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8094 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8107 /************************/
8108 /* Control transmission */
8109 /************************/
8110 /* Now first lets go through the control queue */
8111 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8112 if ((sack_goes_to) &&
8113 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8114 (chk->whoTo != sack_goes_to)) {
8116 * if we have a sack in queue, and we are
8117 * looking at an ecn echo that is NOT queued
8118 * to where the sack is going..
8120 if (chk->whoTo == net) {
8122 * Don't transmit it to where its
8123 * going (current net)
8126 } else if (sack_goes_to == net) {
8128 * But do transmit it to this
8131 goto skip_net_check;
8134 if (chk->whoTo == NULL) {
8135 if (asoc->alternate == NULL) {
8136 if (asoc->primary_destination != net) {
8140 if (asoc->alternate != net) {
8145 if (chk->whoTo != net) {
8150 if (chk->data == NULL) {
8153 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8155 * It must be unsent. Cookies and ASCONF's
8156 * hang around but there timers will force
8157 * when marked for resend.
8162 * if no AUTH is yet included and this chunk
8163 * requires it, make sure to account for it. We
8164 * don't apply the size until the AUTH chunk is
8165 * actually added below in case there is no room for
8166 * this chunk. NOTE: we overload the use of "omtu"
8169 if ((auth == NULL) &&
8170 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8171 stcb->asoc.peer_auth_chunks)) {
8172 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8175 /* Here we do NOT factor the r_mtu */
8176 if ((chk->send_size <= (int)(mtu - omtu)) ||
8177 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8179 * We probably should glom the mbuf chain
8180 * from the chk->data for control but the
8181 * problem is it becomes yet one more level
8182 * of tracking to do if for some reason
8183 * output fails. Then I have got to
8184 * reconstruct the merged control chain.. el
8185 * yucko.. for now we take the easy way and
8189 * Add an AUTH chunk, if chunk requires it
8190 * save the offset into the chain for AUTH
8192 if ((auth == NULL) &&
8193 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8194 stcb->asoc.peer_auth_chunks))) {
8195 outchain = sctp_add_auth_chunk(outchain,
8200 chk->rec.chunk_id.id);
8201 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8203 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8204 (int)chk->rec.chunk_id.can_take_data,
8205 chk->send_size, chk->copy_by_ref);
8206 if (outchain == NULL) {
8208 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8211 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8212 /* update our MTU size */
8213 if (mtu > (chk->send_size + omtu))
8214 mtu -= (chk->send_size + omtu);
8217 to_out += (chk->send_size + omtu);
8218 /* Do clear IP_DF ? */
8219 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8222 if (chk->rec.chunk_id.can_take_data)
8224 /* Mark things to be removed, if needed */
8225 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8226 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8227 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8228 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8229 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8230 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8231 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8232 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8233 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8234 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8235 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8236 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8239 /* remove these chunks at the end */
8240 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8241 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8242 /* turn off the timer */
8243 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8244 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8245 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8251 * Other chunks, since they have
8252 * timers running (i.e. COOKIE) we
8253 * just "trust" that it gets sent or
8257 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8260 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8262 * Increment ecne send count
8263 * here this means we may be
8264 * over-zealous in our
8265 * counting if the send
8266 * fails, but its the best
8267 * place to do it (we used
8268 * to do it in the queue of
8269 * the chunk, but that did
8270 * not tell how many times
8273 SCTP_STAT_INCR(sctps_sendecne);
8275 chk->sent = SCTP_DATAGRAM_SENT;
8276 if (chk->whoTo == NULL) {
8278 atomic_add_int(&net->ref_count, 1);
8284 * Ok we are out of room but we can
8285 * output without effecting the
8286 * flight size since this little guy
8287 * is a control only packet.
8290 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8292 * do NOT clear the asconf
8293 * flag as it is used to do
8294 * appropriate source
8295 * address selection.
8299 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8302 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8303 (struct sockaddr *)&net->ro._l_addr,
8306 stcb->asoc.authinfo.active_keyid,
8307 no_fragmentflg, 0, asconf,
8308 inp->sctp_lport, stcb->rport,
8309 htonl(stcb->asoc.peer_vtag),
8313 if (error == ENOBUFS) {
8314 asoc->ifp_had_enobuf = 1;
8315 SCTP_STAT_INCR(sctps_lowlevelerr);
8317 if (from_where == 0) {
8318 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8320 /* error, could not output */
8322 if (*now_filled == 0) {
8323 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8325 *now = net->last_sent_time;
8327 net->last_sent_time = *now;
8331 if (error == EHOSTUNREACH) {
8337 sctp_move_chunks_from_net(stcb, net);
8342 asoc->ifp_had_enobuf = 0;
8343 /* Only HB or ASCONF advances time */
8345 if (*now_filled == 0) {
8346 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8348 *now = net->last_sent_time;
8350 net->last_sent_time = *now;
8355 * increase the number we sent, if a
8356 * cookie is sent we don't tell them
8359 outchain = endoutchain = NULL;
8363 *num_out += ctl_cnt;
8364 /* recalc a clean slate and setup */
8365 switch (net->ro._l_addr.sa.sa_family) {
8368 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8373 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8386 /* JRI: if dest is in PF state, do not send data to it */
8387 if ((asoc->sctp_cmt_on_off > 0) &&
8388 (net != stcb->asoc.alternate) &&
8389 (net->dest_state & SCTP_ADDR_PF)) {
8392 if (net->flight_size >= net->cwnd) {
8395 if ((asoc->sctp_cmt_on_off > 0) &&
8396 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8397 (net->flight_size > max_rwnd_per_dest)) {
8401 * We need a specific accounting for the usage of the send
8402 * buffer. We also need to check the number of messages per
8403 * net. For now, this is better than nothing and it disabled
8406 if ((asoc->sctp_cmt_on_off > 0) &&
8407 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8408 (max_send_per_dest > 0) &&
8409 (net->flight_size > max_send_per_dest)) {
8412 /*********************/
8413 /* Data transmission */
8414 /*********************/
8416 * if AUTH for DATA is required and no AUTH has been added
8417 * yet, account for this in the mtu now... if no data can be
8418 * bundled, this adjustment won't matter anyways since the
8419 * packet will be going out...
8421 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8422 stcb->asoc.peer_auth_chunks);
8423 if (data_auth_reqd && (auth == NULL)) {
8424 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8426 /* now lets add any data within the MTU constraints */
8427 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8430 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8431 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8438 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8439 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8449 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8450 (skip_data_for_this_net == 0)) ||
8452 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8453 if (no_data_chunks) {
8454 /* let only control go out */
8458 if (net->flight_size >= net->cwnd) {
8459 /* skip this net, no room for data */
8463 if ((chk->whoTo != NULL) &&
8464 (chk->whoTo != net)) {
8465 /* Don't send the chunk on this net */
8468 if (asoc->sctp_cmt_on_off == 0) {
8469 if ((asoc->alternate) &&
8470 (asoc->alternate != net) &&
8471 (chk->whoTo == NULL)) {
8473 } else if ((net != asoc->primary_destination) &&
8474 (asoc->alternate == NULL) &&
8475 (chk->whoTo == NULL)) {
8479 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8481 * strange, we have a chunk that is
8482 * to big for its destination and
8483 * yet no fragment ok flag.
8484 * Something went wrong when the
8485 * PMTU changed...we did not mark
8486 * this chunk for some reason?? I
8487 * will fix it here by letting IP
8488 * fragment it for now and printing
8489 * a warning. This really should not
8492 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8493 chk->send_size, mtu);
8494 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8496 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8497 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8498 struct sctp_data_chunk *dchkh;
8500 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8501 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8503 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8504 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8505 /* ok we will add this one */
8508 * Add an AUTH chunk, if chunk
8509 * requires it, save the offset into
8510 * the chain for AUTH
8512 if (data_auth_reqd) {
8514 outchain = sctp_add_auth_chunk(outchain,
8520 auth_keyid = chk->auth_keyid;
8522 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8523 } else if (override_ok) {
8528 auth_keyid = chk->auth_keyid;
8530 } else if (auth_keyid != chk->auth_keyid) {
8538 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8539 chk->send_size, chk->copy_by_ref);
8540 if (outchain == NULL) {
8541 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8542 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8543 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8546 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8549 /* upate our MTU size */
8550 /* Do clear IP_DF ? */
8551 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8554 /* unsigned subtraction of mtu */
8555 if (mtu > chk->send_size)
8556 mtu -= chk->send_size;
8559 /* unsigned subtraction of r_mtu */
8560 if (r_mtu > chk->send_size)
8561 r_mtu -= chk->send_size;
8565 to_out += chk->send_size;
8566 if ((to_out > mx_mtu) && no_fragmentflg) {
8568 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8570 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8574 chk->window_probe = 0;
8575 data_list[bundle_at++] = chk;
8576 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8579 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8580 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8581 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8583 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8585 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8586 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8596 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8598 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8599 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8600 data_list[0]->window_probe = 1;
8601 net->window_probe = 1;
8607 * Must be sent in order of the
8608 * TSN's (on a network)
8612 } /* for (chunk gather loop for this net) */
8613 } /* if asoc.state OPEN */
8615 /* Is there something to send for this destination? */
8617 /* We may need to start a control timer or two */
8619 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8622 * do NOT clear the asconf flag as it is
8623 * used to do appropriate source address
8628 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8631 /* must start a send timer if data is being sent */
8632 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8634 * no timer running on this destination
8637 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8639 /* Now send it, if there is anything to send :> */
8640 if ((error = sctp_lowlevel_chunk_output(inp,
8643 (struct sockaddr *)&net->ro._l_addr,
8651 inp->sctp_lport, stcb->rport,
8652 htonl(stcb->asoc.peer_vtag),
8656 /* error, we could not output */
8657 if (error == ENOBUFS) {
8658 SCTP_STAT_INCR(sctps_lowlevelerr);
8659 asoc->ifp_had_enobuf = 1;
8661 if (from_where == 0) {
8662 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8664 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8666 if (*now_filled == 0) {
8667 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8669 *now = net->last_sent_time;
8671 net->last_sent_time = *now;
8675 if (error == EHOSTUNREACH) {
8677 * Destination went unreachable
8680 sctp_move_chunks_from_net(stcb, net);
8684 * I add this line to be paranoid. As far as
8685 * I can tell the continue, takes us back to
8686 * the top of the for, but just to make sure
8687 * I will reset these again here.
8689 ctl_cnt = bundle_at = 0;
8690 continue; /* This takes us back to the
8691 * for() for the nets. */
8693 asoc->ifp_had_enobuf = 0;
8698 if (bundle_at || hbflag) {
8699 /* For data/asconf and hb set time */
8700 if (*now_filled == 0) {
8701 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8703 *now = net->last_sent_time;
8705 net->last_sent_time = *now;
8709 *num_out += (ctl_cnt + bundle_at);
8712 /* setup for a RTO measurement */
8713 tsns_sent = data_list[0]->rec.data.TSN_seq;
8714 /* fill time if not already filled */
8715 if (*now_filled == 0) {
8716 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8718 *now = asoc->time_last_sent;
8720 asoc->time_last_sent = *now;
8722 if (net->rto_needed) {
8723 data_list[0]->do_rtt = 1;
8724 net->rto_needed = 0;
8726 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8727 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8733 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8734 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8737 if (old_start_at == NULL) {
8738 old_start_at = start_at;
8739 start_at = TAILQ_FIRST(&asoc->nets);
8741 goto again_one_more_time;
8744 * At the end there should be no NON timed chunks hanging on this
8747 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8748 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8750 if ((*num_out == 0) && (*reason_code == 0)) {
8755 sctp_clean_up_ctl(stcb, asoc, so_locked);
8760 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8763 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8764 * the control chunk queue.
8766 struct sctp_chunkhdr *hdr;
8767 struct sctp_tmit_chunk *chk;
8770 SCTP_TCB_LOCK_ASSERT(stcb);
8771 sctp_alloc_a_chunk(stcb, chk);
8774 sctp_m_freem(op_err);
8777 chk->copy_by_ref = 0;
8778 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8779 if (op_err == NULL) {
8780 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8785 while (mat != NULL) {
8786 chk->send_size += SCTP_BUF_LEN(mat);
8787 mat = SCTP_BUF_NEXT(mat);
8789 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8790 chk->rec.chunk_id.can_take_data = 1;
8791 chk->sent = SCTP_DATAGRAM_UNSENT;
8794 chk->asoc = &stcb->asoc;
8797 hdr = mtod(op_err, struct sctp_chunkhdr *);
8798 hdr->chunk_type = SCTP_OPERATION_ERROR;
8799 hdr->chunk_flags = 0;
8800 hdr->chunk_length = htons(chk->send_size);
8801 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8804 chk->asoc->ctrl_queue_cnt++;
8808 sctp_send_cookie_echo(struct mbuf *m,
8810 struct sctp_tcb *stcb,
8811 struct sctp_nets *net)
8814 * pull out the cookie and put it at the front of the control chunk
8818 struct mbuf *cookie;
8819 struct sctp_paramhdr parm, *phdr;
8820 struct sctp_chunkhdr *hdr;
8821 struct sctp_tmit_chunk *chk;
8822 uint16_t ptype, plen;
8824 /* First find the cookie in the param area */
8826 at = offset + sizeof(struct sctp_init_chunk);
8828 SCTP_TCB_LOCK_ASSERT(stcb);
8830 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8834 ptype = ntohs(phdr->param_type);
8835 plen = ntohs(phdr->param_length);
8836 if (ptype == SCTP_STATE_COOKIE) {
8839 /* found the cookie */
8840 if ((pad = (plen % 4))) {
8843 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
8844 if (cookie == NULL) {
8848 #ifdef SCTP_MBUF_LOGGING
8849 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8852 for (mat = cookie; mat; mat = SCTP_BUF_NEXT(mat)) {
8853 if (SCTP_BUF_IS_EXTENDED(mat)) {
8854 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8861 at += SCTP_SIZE32(plen);
8863 if (cookie == NULL) {
8864 /* Did not find the cookie */
8867 /* ok, we got the cookie lets change it into a cookie echo chunk */
8869 /* first the change from param to cookie */
8870 hdr = mtod(cookie, struct sctp_chunkhdr *);
8871 hdr->chunk_type = SCTP_COOKIE_ECHO;
8872 hdr->chunk_flags = 0;
8873 /* get the chunk stuff now and place it in the FRONT of the queue */
8874 sctp_alloc_a_chunk(stcb, chk);
8877 sctp_m_freem(cookie);
8880 chk->copy_by_ref = 0;
8881 chk->send_size = plen;
8882 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8883 chk->rec.chunk_id.can_take_data = 0;
8884 chk->sent = SCTP_DATAGRAM_UNSENT;
8886 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8887 chk->asoc = &stcb->asoc;
8890 atomic_add_int(&chk->whoTo->ref_count, 1);
8891 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8892 chk->asoc->ctrl_queue_cnt++;
8897 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
8901 struct sctp_nets *net)
8904 * take a HB request and make it into a HB ack and send it.
8906 struct mbuf *outchain;
8907 struct sctp_chunkhdr *chdr;
8908 struct sctp_tmit_chunk *chk;
8912 /* must have a net pointer */
8915 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
8916 if (outchain == NULL) {
8917 /* gak out of memory */
8920 #ifdef SCTP_MBUF_LOGGING
8921 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8924 for (mat = outchain; mat; mat = SCTP_BUF_NEXT(mat)) {
8925 if (SCTP_BUF_IS_EXTENDED(mat)) {
8926 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8931 chdr = mtod(outchain, struct sctp_chunkhdr *);
8932 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
8933 chdr->chunk_flags = 0;
8934 if (chk_length % 4) {
8936 uint32_t cpthis = 0;
8939 padlen = 4 - (chk_length % 4);
8940 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
8942 sctp_alloc_a_chunk(stcb, chk);
8945 sctp_m_freem(outchain);
8948 chk->copy_by_ref = 0;
8949 chk->send_size = chk_length;
8950 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
8951 chk->rec.chunk_id.can_take_data = 1;
8952 chk->sent = SCTP_DATAGRAM_UNSENT;
8955 chk->asoc = &stcb->asoc;
8956 chk->data = outchain;
8958 atomic_add_int(&chk->whoTo->ref_count, 1);
8959 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8960 chk->asoc->ctrl_queue_cnt++;
8964 sctp_send_cookie_ack(struct sctp_tcb *stcb)
8966 /* formulate and queue a cookie-ack back to sender */
8967 struct mbuf *cookie_ack;
8968 struct sctp_chunkhdr *hdr;
8969 struct sctp_tmit_chunk *chk;
8971 SCTP_TCB_LOCK_ASSERT(stcb);
8973 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
8974 if (cookie_ack == NULL) {
8978 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
8979 sctp_alloc_a_chunk(stcb, chk);
8982 sctp_m_freem(cookie_ack);
8985 chk->copy_by_ref = 0;
8986 chk->send_size = sizeof(struct sctp_chunkhdr);
8987 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
8988 chk->rec.chunk_id.can_take_data = 1;
8989 chk->sent = SCTP_DATAGRAM_UNSENT;
8992 chk->asoc = &stcb->asoc;
8993 chk->data = cookie_ack;
8994 if (chk->asoc->last_control_chunk_from != NULL) {
8995 chk->whoTo = chk->asoc->last_control_chunk_from;
8996 atomic_add_int(&chk->whoTo->ref_count, 1);
9000 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9001 hdr->chunk_type = SCTP_COOKIE_ACK;
9002 hdr->chunk_flags = 0;
9003 hdr->chunk_length = htons(chk->send_size);
9004 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9005 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9006 chk->asoc->ctrl_queue_cnt++;
9012 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9014 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9015 struct mbuf *m_shutdown_ack;
9016 struct sctp_shutdown_ack_chunk *ack_cp;
9017 struct sctp_tmit_chunk *chk;
9019 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9020 if (m_shutdown_ack == NULL) {
9024 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9025 sctp_alloc_a_chunk(stcb, chk);
9028 sctp_m_freem(m_shutdown_ack);
9031 chk->copy_by_ref = 0;
9032 chk->send_size = sizeof(struct sctp_chunkhdr);
9033 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9034 chk->rec.chunk_id.can_take_data = 1;
9035 chk->sent = SCTP_DATAGRAM_UNSENT;
9038 chk->asoc = &stcb->asoc;
9039 chk->data = m_shutdown_ack;
9042 atomic_add_int(&chk->whoTo->ref_count, 1);
9044 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9045 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9046 ack_cp->ch.chunk_flags = 0;
9047 ack_cp->ch.chunk_length = htons(chk->send_size);
9048 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9049 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9050 chk->asoc->ctrl_queue_cnt++;
9055 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9057 /* formulate and queue a SHUTDOWN to the sender */
9058 struct mbuf *m_shutdown;
9059 struct sctp_shutdown_chunk *shutdown_cp;
9060 struct sctp_tmit_chunk *chk;
9062 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9063 if (m_shutdown == NULL) {
9067 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9068 sctp_alloc_a_chunk(stcb, chk);
9071 sctp_m_freem(m_shutdown);
9074 chk->copy_by_ref = 0;
9075 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9076 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9077 chk->rec.chunk_id.can_take_data = 1;
9078 chk->sent = SCTP_DATAGRAM_UNSENT;
9081 chk->asoc = &stcb->asoc;
9082 chk->data = m_shutdown;
9085 atomic_add_int(&chk->whoTo->ref_count, 1);
9087 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9088 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9089 shutdown_cp->ch.chunk_flags = 0;
9090 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9091 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9092 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9093 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9094 chk->asoc->ctrl_queue_cnt++;
9099 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9102 * formulate and queue an ASCONF to the peer. ASCONF parameters
9103 * should be queued on the assoc queue.
9105 struct sctp_tmit_chunk *chk;
9106 struct mbuf *m_asconf;
9109 SCTP_TCB_LOCK_ASSERT(stcb);
9111 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9112 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9113 /* can't send a new one if there is one in flight already */
9116 /* compose an ASCONF chunk, maximum length is PMTU */
9117 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9118 if (m_asconf == NULL) {
9121 sctp_alloc_a_chunk(stcb, chk);
9124 sctp_m_freem(m_asconf);
9127 chk->copy_by_ref = 0;
9128 chk->data = m_asconf;
9129 chk->send_size = len;
9130 chk->rec.chunk_id.id = SCTP_ASCONF;
9131 chk->rec.chunk_id.can_take_data = 0;
9132 chk->sent = SCTP_DATAGRAM_UNSENT;
9134 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9135 chk->asoc = &stcb->asoc;
9138 atomic_add_int(&chk->whoTo->ref_count, 1);
9140 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9141 chk->asoc->ctrl_queue_cnt++;
9146 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9149 * formulate and queue a asconf-ack back to sender. the asconf-ack
9150 * must be stored in the tcb.
9152 struct sctp_tmit_chunk *chk;
9153 struct sctp_asconf_ack *ack, *latest_ack;
9155 struct sctp_nets *net = NULL;
9157 SCTP_TCB_LOCK_ASSERT(stcb);
9158 /* Get the latest ASCONF-ACK */
9159 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9160 if (latest_ack == NULL) {
9163 if (latest_ack->last_sent_to != NULL &&
9164 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9165 /* we're doing a retransmission */
9166 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9169 if (stcb->asoc.last_control_chunk_from == NULL) {
9170 if (stcb->asoc.alternate) {
9171 net = stcb->asoc.alternate;
9173 net = stcb->asoc.primary_destination;
9176 net = stcb->asoc.last_control_chunk_from;
9181 if (stcb->asoc.last_control_chunk_from == NULL) {
9182 if (stcb->asoc.alternate) {
9183 net = stcb->asoc.alternate;
9185 net = stcb->asoc.primary_destination;
9188 net = stcb->asoc.last_control_chunk_from;
9191 latest_ack->last_sent_to = net;
9193 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9194 if (ack->data == NULL) {
9197 /* copy the asconf_ack */
9198 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9199 if (m_ack == NULL) {
9200 /* couldn't copy it */
9203 #ifdef SCTP_MBUF_LOGGING
9204 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9207 for (mat = m_ack; mat; mat = SCTP_BUF_NEXT(mat)) {
9208 if (SCTP_BUF_IS_EXTENDED(mat)) {
9209 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9215 sctp_alloc_a_chunk(stcb, chk);
9219 sctp_m_freem(m_ack);
9222 chk->copy_by_ref = 0;
9226 atomic_add_int(&chk->whoTo->ref_count, 1);
9231 chk->send_size = ack->len;
9232 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9233 chk->rec.chunk_id.can_take_data = 1;
9234 chk->sent = SCTP_DATAGRAM_UNSENT;
9236 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */
9237 chk->asoc = &stcb->asoc;
9239 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9240 chk->asoc->ctrl_queue_cnt++;
9247 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9248 struct sctp_tcb *stcb,
9249 struct sctp_association *asoc,
9250 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9251 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9257 * send out one MTU of retransmission. If fast_retransmit is
9258 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9259 * rwnd. For a Cookie or Asconf in the control chunk queue we
9260 * retransmit them by themselves.
9262 * For data chunks we will pick out the lowest TSN's in the sent_queue
9263 * marked for resend and bundle them all together (up to a MTU of
9264 * destination). The address to send to should have been
9265 * selected/changed where the retransmission was marked (i.e. in FR
9266 * or t3-timeout routines).
9268 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9269 struct sctp_tmit_chunk *chk, *fwd;
9270 struct mbuf *m, *endofchain;
9271 struct sctp_nets *net = NULL;
9272 uint32_t tsns_sent = 0;
9273 int no_fragmentflg, bundle_at, cnt_thru;
9275 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9276 struct sctp_auth_chunk *auth = NULL;
9277 uint32_t auth_offset = 0;
9278 uint16_t auth_keyid;
9279 int override_ok = 1;
9280 int data_auth_reqd = 0;
9283 SCTP_TCB_LOCK_ASSERT(stcb);
9284 tmr_started = ctl_cnt = bundle_at = error = 0;
9289 endofchain = m = NULL;
9290 auth_keyid = stcb->asoc.authinfo.active_keyid;
9291 #ifdef SCTP_AUDITING_ENABLED
9292 sctp_audit_log(0xC3, 1);
9294 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9295 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9296 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9297 asoc->sent_queue_retran_cnt);
9298 asoc->sent_queue_cnt = 0;
9299 asoc->sent_queue_cnt_removeable = 0;
9300 /* send back 0/0 so we enter normal transmission */
9304 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9305 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9306 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9307 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9308 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9311 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9312 if (chk != asoc->str_reset) {
9314 * not eligible for retran if its
9321 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9325 * Add an AUTH chunk, if chunk requires it save the
9326 * offset into the chain for AUTH
9328 if ((auth == NULL) &&
9329 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9330 stcb->asoc.peer_auth_chunks))) {
9331 m = sctp_add_auth_chunk(m, &endofchain,
9332 &auth, &auth_offset,
9334 chk->rec.chunk_id.id);
9335 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9337 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9343 /* do we have control chunks to retransmit? */
9345 /* Start a timer no matter if we suceed or fail */
9346 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9347 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9348 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9349 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9350 chk->snd_count++; /* update our count */
9351 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9352 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9353 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9354 no_fragmentflg, 0, 0,
9355 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9356 chk->whoTo->port, NULL,
9359 SCTP_STAT_INCR(sctps_lowlevelerr);
9366 * We don't want to mark the net->sent time here since this
9367 * we use this for HB and retrans cannot measure RTT
9369 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9371 chk->sent = SCTP_DATAGRAM_SENT;
9372 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9376 /* Clean up the fwd-tsn list */
9377 sctp_clean_up_ctl(stcb, asoc, so_locked);
9382 * Ok, it is just data retransmission we need to do or that and a
9383 * fwd-tsn with it all.
9385 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9386 return (SCTP_RETRAN_DONE);
9388 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9389 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9390 /* not yet open, resend the cookie and that is it */
9393 #ifdef SCTP_AUDITING_ENABLED
9394 sctp_auditing(20, inp, stcb, NULL);
9396 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9397 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9398 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9399 /* No, not sent to this net or not ready for rtx */
9402 if (chk->data == NULL) {
9403 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9404 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9407 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9408 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9409 /* Gak, we have exceeded max unlucky retran, abort! */
9410 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9412 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9413 atomic_add_int(&stcb->asoc.refcnt, 1);
9414 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked);
9415 SCTP_TCB_LOCK(stcb);
9416 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9417 return (SCTP_RETRAN_EXIT);
9419 /* pick up the net */
9421 switch (net->ro._l_addr.sa.sa_family) {
9424 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9429 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9438 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9439 /* No room in peers rwnd */
9442 tsn = asoc->last_acked_seq + 1;
9443 if (tsn == chk->rec.data.TSN_seq) {
9445 * we make a special exception for this
9446 * case. The peer has no rwnd but is missing
9447 * the lowest chunk.. which is probably what
9448 * is holding up the rwnd.
9450 goto one_chunk_around;
9455 if (asoc->peers_rwnd < mtu) {
9457 if ((asoc->peers_rwnd == 0) &&
9458 (asoc->total_flight == 0)) {
9459 chk->window_probe = 1;
9460 chk->whoTo->window_probe = 1;
9463 #ifdef SCTP_AUDITING_ENABLED
9464 sctp_audit_log(0xC3, 2);
9468 net->fast_retran_ip = 0;
9469 if (chk->rec.data.doing_fast_retransmit == 0) {
9471 * if no FR in progress skip destination that have
9472 * flight_size > cwnd.
9474 if (net->flight_size >= net->cwnd) {
9479 * Mark the destination net to have FR recovery
9483 net->fast_retran_ip = 1;
9487 * if no AUTH is yet included and this chunk requires it,
9488 * make sure to account for it. We don't apply the size
9489 * until the AUTH chunk is actually added below in case
9490 * there is no room for this chunk.
9492 if (data_auth_reqd && (auth == NULL)) {
9493 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9497 if ((chk->send_size <= (mtu - dmtu)) ||
9498 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9499 /* ok we will add this one */
9500 if (data_auth_reqd) {
9502 m = sctp_add_auth_chunk(m,
9508 auth_keyid = chk->auth_keyid;
9510 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9511 } else if (override_ok) {
9512 auth_keyid = chk->auth_keyid;
9514 } else if (chk->auth_keyid != auth_keyid) {
9515 /* different keyid, so done bundling */
9519 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9521 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9524 /* Do clear IP_DF ? */
9525 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9528 /* upate our MTU size */
9529 if (mtu > (chk->send_size + dmtu))
9530 mtu -= (chk->send_size + dmtu);
9533 data_list[bundle_at++] = chk;
9534 if (one_chunk && (asoc->total_flight <= 0)) {
9535 SCTP_STAT_INCR(sctps_windowprobed);
9538 if (one_chunk == 0) {
9540 * now are there anymore forward from chk to pick
9543 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9544 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9545 /* Nope, not for retran */
9548 if (fwd->whoTo != net) {
9549 /* Nope, not the net in question */
9552 if (data_auth_reqd && (auth == NULL)) {
9553 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9556 if (fwd->send_size <= (mtu - dmtu)) {
9557 if (data_auth_reqd) {
9559 m = sctp_add_auth_chunk(m,
9565 auth_keyid = fwd->auth_keyid;
9567 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9568 } else if (override_ok) {
9569 auth_keyid = fwd->auth_keyid;
9571 } else if (fwd->auth_keyid != auth_keyid) {
9579 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9581 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9584 /* Do clear IP_DF ? */
9585 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9588 /* upate our MTU size */
9589 if (mtu > (fwd->send_size + dmtu))
9590 mtu -= (fwd->send_size + dmtu);
9593 data_list[bundle_at++] = fwd;
9594 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9598 /* can't fit so we are done */
9603 /* Is there something to send for this destination? */
9606 * No matter if we fail/or suceed we should start a
9607 * timer. A failure is like a lost IP packet :-)
9609 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9611 * no timer running on this destination
9614 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9617 /* Now lets send it, if there is anything to send :> */
9618 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9619 (struct sockaddr *)&net->ro._l_addr, m,
9620 auth_offset, auth, auth_keyid,
9621 no_fragmentflg, 0, 0,
9622 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9626 /* error, we could not output */
9627 SCTP_STAT_INCR(sctps_lowlevelerr);
9635 * We don't want to mark the net->sent time here
9636 * since this we use this for HB and retrans cannot
9639 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9641 /* For auto-close */
9643 if (*now_filled == 0) {
9644 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9645 *now = asoc->time_last_sent;
9648 asoc->time_last_sent = *now;
9650 *cnt_out += bundle_at;
9651 #ifdef SCTP_AUDITING_ENABLED
9652 sctp_audit_log(0xC4, bundle_at);
9655 tsns_sent = data_list[0]->rec.data.TSN_seq;
9657 for (i = 0; i < bundle_at; i++) {
9658 SCTP_STAT_INCR(sctps_sendretransdata);
9659 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9661 * When we have a revoked data, and we
9662 * retransmit it, then we clear the revoked
9663 * flag since this flag dictates if we
9664 * subtracted from the fs
9666 if (data_list[i]->rec.data.chunk_was_revoked) {
9667 /* Deflate the cwnd */
9668 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9669 data_list[i]->rec.data.chunk_was_revoked = 0;
9671 data_list[i]->snd_count++;
9672 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9673 /* record the time */
9674 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9675 if (data_list[i]->book_size_scale) {
9677 * need to double the book size on
9680 data_list[i]->book_size_scale = 0;
9682 * Since we double the booksize, we
9683 * must also double the output queue
9684 * size, since this get shrunk when
9685 * we free by this amount.
9687 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9688 data_list[i]->book_size *= 2;
9692 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9693 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9694 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9696 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9697 (uint32_t) (data_list[i]->send_size +
9698 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9700 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9701 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9702 data_list[i]->whoTo->flight_size,
9703 data_list[i]->book_size,
9704 (uintptr_t) data_list[i]->whoTo,
9705 data_list[i]->rec.data.TSN_seq);
9707 sctp_flight_size_increase(data_list[i]);
9708 sctp_total_flight_increase(stcb, data_list[i]);
9709 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9710 /* SWS sender side engages */
9711 asoc->peers_rwnd = 0;
9714 (data_list[i]->rec.data.doing_fast_retransmit)) {
9715 SCTP_STAT_INCR(sctps_sendfastretrans);
9716 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9717 (tmr_started == 0)) {
9719 * ok we just fast-retrans'd
9720 * the lowest TSN, i.e the
9721 * first on the list. In
9722 * this case we want to give
9723 * some more time to get a
9724 * SACK back without a
9727 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9728 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
9729 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9733 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9734 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9736 #ifdef SCTP_AUDITING_ENABLED
9737 sctp_auditing(21, inp, stcb, NULL);
9743 if (asoc->sent_queue_retran_cnt <= 0) {
9744 /* all done we have no more to retran */
9745 asoc->sent_queue_retran_cnt = 0;
9749 /* No more room in rwnd */
9752 /* stop the for loop here. we sent out a packet */
9759 sctp_timer_validation(struct sctp_inpcb *inp,
9760 struct sctp_tcb *stcb,
9761 struct sctp_association *asoc)
9763 struct sctp_nets *net;
9765 /* Validate that a timer is running somewhere */
9766 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9767 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9768 /* Here is a timer */
9772 SCTP_TCB_LOCK_ASSERT(stcb);
9773 /* Gak, we did not have a timer somewhere */
9774 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9775 if (asoc->alternate) {
9776 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9778 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9784 sctp_chunk_output(struct sctp_inpcb *inp,
9785 struct sctp_tcb *stcb,
9788 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9794 * Ok this is the generic chunk service queue. we must do the
9796 * - See if there are retransmits pending, if so we must
9798 * - Service the stream queue that is next, moving any
9799 * message (note I must get a complete message i.e.
9800 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9802 * - Check to see if the cwnd/rwnd allows any output, if so we
9803 * go ahead and fomulate and send the low level chunks. Making sure
9804 * to combine any control in the control chunk queue also.
9806 struct sctp_association *asoc;
9807 struct sctp_nets *net;
9808 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0;
9809 unsigned int burst_cnt = 0;
9813 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9816 unsigned int tot_frs = 0;
9819 /* The Nagle algorithm is only applied when handling a send call. */
9820 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9821 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9829 SCTP_TCB_LOCK_ASSERT(stcb);
9831 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9833 if ((un_sent <= 0) &&
9834 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9835 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9836 (asoc->sent_queue_retran_cnt == 0)) {
9837 /* Nothing to do unless there is something to be sent left */
9841 * Do we have something to send, data or control AND a sack timer
9842 * running, if so piggy-back the sack.
9844 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9845 sctp_send_sack(stcb, so_locked);
9846 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9848 while (asoc->sent_queue_retran_cnt) {
9850 * Ok, it is retransmission time only, we send out only ONE
9851 * packet with a single call off to the retran code.
9853 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9855 * Special hook for handling cookiess discarded
9856 * by peer that carried data. Send cookie-ack only
9857 * and then the next call with get the retran's.
9859 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9861 &now, &now_filled, frag_point, so_locked);
9863 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9864 /* if its not from a HB then do it */
9866 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9872 * its from any other place, we don't allow retran
9873 * output (only control)
9878 /* Can't send anymore */
9880 * now lets push out control by calling med-level
9881 * output once. this assures that we WILL send HB's
9884 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9886 &now, &now_filled, frag_point, so_locked);
9887 #ifdef SCTP_AUDITING_ENABLED
9888 sctp_auditing(8, inp, stcb, NULL);
9890 sctp_timer_validation(inp, stcb, asoc);
9895 * The count was off.. retran is not happening so do
9896 * the normal retransmission.
9898 #ifdef SCTP_AUDITING_ENABLED
9899 sctp_auditing(9, inp, stcb, NULL);
9901 if (ret == SCTP_RETRAN_EXIT) {
9906 if (from_where == SCTP_OUTPUT_FROM_T3) {
9907 /* Only one transmission allowed out of a timeout */
9908 #ifdef SCTP_AUDITING_ENABLED
9909 sctp_auditing(10, inp, stcb, NULL);
9911 /* Push out any control */
9912 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
9913 &now, &now_filled, frag_point, so_locked);
9916 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
9917 /* Hit FR burst limit */
9920 if ((num_out == 0) && (ret == 0)) {
9921 /* No more retrans to send */
9925 #ifdef SCTP_AUDITING_ENABLED
9926 sctp_auditing(12, inp, stcb, NULL);
9928 /* Check for bad destinations, if they exist move chunks around. */
9929 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9930 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
9932 * if possible move things off of this address we
9933 * still may send below due to the dormant state but
9934 * we try to find an alternate address to send to
9935 * and if we have one we move all queued data on the
9936 * out wheel to this alternate address.
9938 if (net->ref_count > 1)
9939 sctp_move_chunks_from_net(stcb, net);
9942 * if ((asoc->sat_network) || (net->addr_is_local))
9943 * { burst_limit = asoc->max_burst *
9944 * SCTP_SAT_NETWORK_BURST_INCR; }
9946 if (asoc->max_burst > 0) {
9947 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
9948 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
9950 * JRS - Use the congestion
9951 * control given in the
9952 * congestion control module
9954 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
9955 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
9956 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
9958 SCTP_STAT_INCR(sctps_maxburstqueued);
9960 net->fast_retran_ip = 0;
9962 if (net->flight_size == 0) {
9964 * Should be decaying the
9976 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
9977 &reason_code, 0, from_where,
9978 &now, &now_filled, frag_point, so_locked);
9980 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
9981 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
9982 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
9984 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9985 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
9986 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
9990 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
9994 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9995 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
9997 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10002 * When the Nagle algorithm is used, look at how
10003 * much is unsent, then if its smaller than an MTU
10004 * and we have data in flight we stop, except if we
10005 * are handling a fragmented user message.
10007 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10008 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10009 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10010 (stcb->asoc.total_flight > 0) &&
10011 ((stcb->asoc.locked_on_sending == NULL) ||
10012 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10016 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10017 TAILQ_EMPTY(&asoc->send_queue) &&
10018 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10019 /* Nothing left to send */
10022 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10023 /* Nothing left to send */
10026 } while (num_out &&
10027 ((asoc->max_burst == 0) ||
10028 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10029 (burst_cnt < asoc->max_burst)));
10031 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10032 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10033 SCTP_STAT_INCR(sctps_maxburstqueued);
10034 asoc->burst_limit_applied = 1;
10035 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10036 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10039 asoc->burst_limit_applied = 0;
10042 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10043 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10045 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10049 * Now we need to clean up the control chunk chain if a ECNE is on
10050 * it. It must be marked as UNSENT again so next call will continue
10051 * to send it until such time that we get a CWR, to remove it.
10053 if (stcb->asoc.ecn_echo_cnt_onq)
10054 sctp_fix_ecn_echo(asoc);
10061 struct sctp_inpcb *inp,
10063 struct sockaddr *addr,
10064 struct mbuf *control,
10069 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10072 if (inp->sctp_socket == NULL) {
10073 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10076 return (sctp_sosend(inp->sctp_socket,
10078 (struct uio *)NULL,
10086 send_forward_tsn(struct sctp_tcb *stcb,
10087 struct sctp_association *asoc)
10089 struct sctp_tmit_chunk *chk;
10090 struct sctp_forward_tsn_chunk *fwdtsn;
10091 uint32_t advance_peer_ack_point;
10093 SCTP_TCB_LOCK_ASSERT(stcb);
10094 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10095 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10096 /* mark it to unsent */
10097 chk->sent = SCTP_DATAGRAM_UNSENT;
10098 chk->snd_count = 0;
10099 /* Do we correct its output location? */
10101 sctp_free_remote_addr(chk->whoTo);
10104 goto sctp_fill_in_rest;
10107 /* Ok if we reach here we must build one */
10108 sctp_alloc_a_chunk(stcb, chk);
10112 asoc->fwd_tsn_cnt++;
10113 chk->copy_by_ref = 0;
10114 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10115 chk->rec.chunk_id.can_take_data = 0;
10118 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10119 if (chk->data == NULL) {
10120 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10123 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10124 chk->sent = SCTP_DATAGRAM_UNSENT;
10125 chk->snd_count = 0;
10126 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10127 asoc->ctrl_queue_cnt++;
10130 * Here we go through and fill out the part that deals with
10131 * stream/seq of the ones we skip.
10133 SCTP_BUF_LEN(chk->data) = 0;
10135 struct sctp_tmit_chunk *at, *tp1, *last;
10136 struct sctp_strseq *strseq;
10137 unsigned int cnt_of_space, i, ovh;
10138 unsigned int space_needed;
10139 unsigned int cnt_of_skipped = 0;
10141 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10142 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10143 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10144 /* no more to look at */
10147 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10148 /* We don't report these */
10153 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10154 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10156 cnt_of_space = M_TRAILINGSPACE(chk->data);
10158 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10159 ovh = SCTP_MIN_OVERHEAD;
10161 ovh = SCTP_MIN_V4_OVERHEAD;
10163 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10164 /* trim to a mtu size */
10165 cnt_of_space = asoc->smallest_mtu - ovh;
10167 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10168 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10169 0xff, 0, cnt_of_skipped,
10170 asoc->advanced_peer_ack_point);
10173 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10174 if (cnt_of_space < space_needed) {
10176 * ok we must trim down the chunk by lowering the
10177 * advance peer ack point.
10179 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10180 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10181 0xff, 0xff, cnt_of_space,
10184 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10185 cnt_of_skipped /= sizeof(struct sctp_strseq);
10187 * Go through and find the TSN that will be the one
10190 at = TAILQ_FIRST(&asoc->sent_queue);
10192 for (i = 0; i < cnt_of_skipped; i++) {
10193 tp1 = TAILQ_NEXT(at, sctp_next);
10200 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10201 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10202 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10203 asoc->advanced_peer_ack_point);
10207 * last now points to last one I can report, update
10211 advance_peer_ack_point = last->rec.data.TSN_seq;
10212 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10213 cnt_of_skipped * sizeof(struct sctp_strseq);
10215 chk->send_size = space_needed;
10216 /* Setup the chunk */
10217 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10218 fwdtsn->ch.chunk_length = htons(chk->send_size);
10219 fwdtsn->ch.chunk_flags = 0;
10220 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10221 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10222 SCTP_BUF_LEN(chk->data) = chk->send_size;
10225 * Move pointer to after the fwdtsn and transfer to the
10228 strseq = (struct sctp_strseq *)fwdtsn;
10230 * Now populate the strseq list. This is done blindly
10231 * without pulling out duplicate stream info. This is
10232 * inefficent but won't harm the process since the peer will
10233 * look at these in sequence and will thus release anything.
10234 * It could mean we exceed the PMTU and chop off some that
10235 * we could have included.. but this is unlikely (aka 1432/4
10236 * would mean 300+ stream seq's would have to be reported in
10237 * one FWD-TSN. With a bit of work we can later FIX this to
10238 * optimize and pull out duplcates.. but it does add more
10239 * overhead. So for now... not!
10241 at = TAILQ_FIRST(&asoc->sent_queue);
10242 for (i = 0; i < cnt_of_skipped; i++) {
10243 tp1 = TAILQ_NEXT(at, sctp_next);
10246 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10247 /* We don't report these */
10252 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10253 at->rec.data.fwd_tsn_cnt = 0;
10255 strseq->stream = ntohs(at->rec.data.stream_number);
10256 strseq->sequence = ntohs(at->rec.data.stream_seq);
10265 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10266 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10272 * Queue up a SACK or NR-SACK in the control queue.
10273 * We must first check to see if a SACK or NR-SACK is
10274 * somehow on the control queue.
10275 * If so, we will take and and remove the old one.
10277 struct sctp_association *asoc;
10278 struct sctp_tmit_chunk *chk, *a_chk;
10279 struct sctp_sack_chunk *sack;
10280 struct sctp_nr_sack_chunk *nr_sack;
10281 struct sctp_gap_ack_block *gap_descriptor;
10282 struct sack_track *selector;
10287 int limit_reached = 0;
10288 unsigned int i, siz, j;
10289 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10292 uint32_t highest_tsn;
10297 if ((stcb->asoc.sctp_nr_sack_on_off == 1) &&
10298 (stcb->asoc.peer_supports_nr_sack == 1)) {
10299 type = SCTP_NR_SELECTIVE_ACK;
10301 type = SCTP_SELECTIVE_ACK;
10304 asoc = &stcb->asoc;
10305 SCTP_TCB_LOCK_ASSERT(stcb);
10306 if (asoc->last_data_chunk_from == NULL) {
10307 /* Hmm we never received anything */
10310 sctp_slide_mapping_arrays(stcb);
10311 sctp_set_rwnd(stcb, asoc);
10312 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10313 if (chk->rec.chunk_id.id == type) {
10314 /* Hmm, found a sack already on queue, remove it */
10315 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10316 asoc->ctrl_queue_cnt--;
10319 sctp_m_freem(a_chk->data);
10320 a_chk->data = NULL;
10322 if (a_chk->whoTo) {
10323 sctp_free_remote_addr(a_chk->whoTo);
10324 a_chk->whoTo = NULL;
10329 if (a_chk == NULL) {
10330 sctp_alloc_a_chunk(stcb, a_chk);
10331 if (a_chk == NULL) {
10332 /* No memory so we drop the idea, and set a timer */
10333 if (stcb->asoc.delayed_ack) {
10334 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10335 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10336 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10337 stcb->sctp_ep, stcb, NULL);
10339 stcb->asoc.send_sack = 1;
10343 a_chk->copy_by_ref = 0;
10344 a_chk->rec.chunk_id.id = type;
10345 a_chk->rec.chunk_id.can_take_data = 1;
10347 /* Clear our pkt counts */
10348 asoc->data_pkts_seen = 0;
10350 a_chk->asoc = asoc;
10351 a_chk->snd_count = 0;
10352 a_chk->send_size = 0; /* fill in later */
10353 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10354 a_chk->whoTo = NULL;
10356 if ((asoc->numduptsns) ||
10357 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) {
10359 * Ok, we have some duplicates or the destination for the
10360 * sack is unreachable, lets see if we can select an
10361 * alternate than asoc->last_data_chunk_from
10363 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) &&
10364 (asoc->used_alt_onsack > asoc->numnets)) {
10365 /* We used an alt last time, don't this time */
10366 a_chk->whoTo = NULL;
10368 asoc->used_alt_onsack++;
10369 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10371 if (a_chk->whoTo == NULL) {
10372 /* Nope, no alternate */
10373 a_chk->whoTo = asoc->last_data_chunk_from;
10374 asoc->used_alt_onsack = 0;
10378 * No duplicates so we use the last place we received data
10381 asoc->used_alt_onsack = 0;
10382 a_chk->whoTo = asoc->last_data_chunk_from;
10384 if (a_chk->whoTo) {
10385 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10387 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10388 highest_tsn = asoc->highest_tsn_inside_map;
10390 highest_tsn = asoc->highest_tsn_inside_nr_map;
10392 if (highest_tsn == asoc->cumulative_tsn) {
10394 if (type == SCTP_SELECTIVE_ACK) {
10395 space_req = sizeof(struct sctp_sack_chunk);
10397 space_req = sizeof(struct sctp_nr_sack_chunk);
10400 /* gaps get a cluster */
10401 space_req = MCLBYTES;
10403 /* Ok now lets formulate a MBUF with our sack */
10404 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10405 if ((a_chk->data == NULL) ||
10406 (a_chk->whoTo == NULL)) {
10407 /* rats, no mbuf memory */
10409 /* was a problem with the destination */
10410 sctp_m_freem(a_chk->data);
10411 a_chk->data = NULL;
10413 sctp_free_a_chunk(stcb, a_chk, so_locked);
10414 /* sa_ignore NO_NULL_CHK */
10415 if (stcb->asoc.delayed_ack) {
10416 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10417 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
10418 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10419 stcb->sctp_ep, stcb, NULL);
10421 stcb->asoc.send_sack = 1;
10425 /* ok, lets go through and fill it in */
10426 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10427 space = M_TRAILINGSPACE(a_chk->data);
10428 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10429 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10431 limit = mtod(a_chk->data, caddr_t);
10436 if ((asoc->sctp_cmt_on_off > 0) &&
10437 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10439 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10440 * received, then set high bit to 1, else 0. Reset
10443 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10444 asoc->cmt_dac_pkts_rcvd = 0;
10446 #ifdef SCTP_ASOCLOG_OF_TSNS
10447 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10448 stcb->asoc.cumack_log_atsnt++;
10449 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10450 stcb->asoc.cumack_log_atsnt = 0;
10453 /* reset the readers interpretation */
10454 stcb->freed_by_sorcv_sincelast = 0;
10456 if (type == SCTP_SELECTIVE_ACK) {
10457 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10459 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10460 if (highest_tsn > asoc->mapping_array_base_tsn) {
10461 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10463 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10467 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10468 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10469 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10470 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10472 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10476 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10479 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10481 if (((type == SCTP_SELECTIVE_ACK) &&
10482 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10483 ((type == SCTP_NR_SELECTIVE_ACK) &&
10484 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10485 /* we have a gap .. maybe */
10486 for (i = 0; i < siz; i++) {
10487 tsn_map = asoc->mapping_array[i];
10488 if (type == SCTP_SELECTIVE_ACK) {
10489 tsn_map |= asoc->nr_mapping_array[i];
10493 * Clear all bits corresponding to TSNs
10494 * smaller or equal to the cumulative TSN.
10496 tsn_map &= (~0 << (1 - offset));
10498 selector = &sack_array[tsn_map];
10499 if (mergeable && selector->right_edge) {
10501 * Backup, left and right edges were ok to
10507 if (selector->num_entries == 0)
10510 for (j = 0; j < selector->num_entries; j++) {
10511 if (mergeable && selector->right_edge) {
10513 * do a merge by NOT setting
10519 * no merge, set the left
10523 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10525 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10528 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10534 if (selector->left_edge) {
10538 if (limit_reached) {
10539 /* Reached the limit stop */
10545 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10546 (limit_reached == 0)) {
10550 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10551 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10553 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10556 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10559 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10561 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10562 /* we have a gap .. maybe */
10563 for (i = 0; i < siz; i++) {
10564 tsn_map = asoc->nr_mapping_array[i];
10567 * Clear all bits corresponding to
10568 * TSNs smaller or equal to the
10571 tsn_map &= (~0 << (1 - offset));
10573 selector = &sack_array[tsn_map];
10574 if (mergeable && selector->right_edge) {
10576 * Backup, left and right edges were
10579 num_nr_gap_blocks--;
10582 if (selector->num_entries == 0)
10585 for (j = 0; j < selector->num_entries; j++) {
10586 if (mergeable && selector->right_edge) {
10588 * do a merge by NOT
10595 * no merge, set the
10599 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10601 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10602 num_nr_gap_blocks++;
10604 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10610 if (selector->left_edge) {
10614 if (limit_reached) {
10615 /* Reached the limit stop */
10622 /* now we must add any dups we are going to report. */
10623 if ((limit_reached == 0) && (asoc->numduptsns)) {
10624 dup = (uint32_t *) gap_descriptor;
10625 for (i = 0; i < asoc->numduptsns; i++) {
10626 *dup = htonl(asoc->dup_tsns[i]);
10629 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10634 asoc->numduptsns = 0;
10637 * now that the chunk is prepared queue it to the control chunk
10640 if (type == SCTP_SELECTIVE_ACK) {
10641 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10642 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10643 num_dups * sizeof(int32_t);
10644 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10645 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10646 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10647 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10648 sack->sack.num_dup_tsns = htons(num_dups);
10649 sack->ch.chunk_type = type;
10650 sack->ch.chunk_flags = flags;
10651 sack->ch.chunk_length = htons(a_chk->send_size);
10653 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10654 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10655 num_dups * sizeof(int32_t);
10656 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10657 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10658 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10659 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10660 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10661 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10662 nr_sack->nr_sack.reserved = 0;
10663 nr_sack->ch.chunk_type = type;
10664 nr_sack->ch.chunk_flags = flags;
10665 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10667 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10668 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10669 asoc->ctrl_queue_cnt++;
10670 asoc->send_sack = 0;
10671 SCTP_STAT_INCR(sctps_sendsacks);
10676 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10677 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10682 struct mbuf *m_abort, *m, *m_last;
10683 struct mbuf *m_out, *m_end = NULL;
10684 struct sctp_abort_chunk *abort;
10685 struct sctp_auth_chunk *auth = NULL;
10686 struct sctp_nets *net;
10688 uint32_t auth_offset = 0;
10689 uint16_t cause_len, chunk_len, padding_len;
10691 SCTP_TCB_LOCK_ASSERT(stcb);
10693 * Add an AUTH chunk, if chunk requires it and save the offset into
10694 * the chain for AUTH
10696 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10697 stcb->asoc.peer_auth_chunks)) {
10698 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10699 stcb, SCTP_ABORT_ASSOCIATION);
10700 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10704 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10705 if (m_abort == NULL) {
10707 sctp_m_freem(m_out);
10710 sctp_m_freem(operr);
10714 /* link in any error */
10715 SCTP_BUF_NEXT(m_abort) = operr;
10718 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10719 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10720 if (SCTP_BUF_NEXT(m) == NULL) {
10724 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10725 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10726 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10727 if (m_out == NULL) {
10728 /* NO Auth chunk prepended, so reserve space in front */
10729 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10732 /* Put AUTH chunk at the front of the chain */
10733 SCTP_BUF_NEXT(m_end) = m_abort;
10735 if (stcb->asoc.alternate) {
10736 net = stcb->asoc.alternate;
10738 net = stcb->asoc.primary_destination;
10740 /* Fill in the ABORT chunk header. */
10741 abort = mtod(m_abort, struct sctp_abort_chunk *);
10742 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10743 if (stcb->asoc.peer_vtag == 0) {
10744 /* This happens iff the assoc is in COOKIE-WAIT state. */
10745 vtag = stcb->asoc.my_vtag;
10746 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10748 vtag = stcb->asoc.peer_vtag;
10749 abort->ch.chunk_flags = 0;
10751 abort->ch.chunk_length = htons(chunk_len);
10752 /* Add padding, if necessary. */
10753 if (padding_len > 0) {
10754 if ((m_last == NULL) || sctp_add_pad_tombuf(m_last, padding_len)) {
10755 sctp_m_freem(m_out);
10759 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10760 (struct sockaddr *)&net->ro._l_addr,
10761 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10762 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10763 stcb->asoc.primary_destination->port, NULL,
10766 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10770 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10771 struct sctp_nets *net,
10774 /* formulate and SEND a SHUTDOWN-COMPLETE */
10775 struct mbuf *m_shutdown_comp;
10776 struct sctp_shutdown_complete_chunk *shutdown_complete;
10780 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10781 if (m_shutdown_comp == NULL) {
10785 if (reflect_vtag) {
10786 flags = SCTP_HAD_NO_TCB;
10787 vtag = stcb->asoc.my_vtag;
10790 vtag = stcb->asoc.peer_vtag;
10792 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10793 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10794 shutdown_complete->ch.chunk_flags = flags;
10795 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10796 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10797 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10798 (struct sockaddr *)&net->ro._l_addr,
10799 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10800 stcb->sctp_ep->sctp_lport, stcb->rport,
10804 SCTP_SO_NOT_LOCKED);
10805 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10810 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10811 struct sctphdr *sh, uint32_t vtag,
10812 uint8_t type, struct mbuf *cause,
10813 uint8_t use_mflowid, uint32_t mflowid,
10814 uint32_t vrf_id, uint16_t port)
10816 struct mbuf *o_pak;
10818 struct sctphdr *shout;
10819 struct sctp_chunkhdr *ch;
10820 struct udphdr *udp;
10821 int len, cause_len, padding_len;
10823 #if defined(INET) || defined(INET6)
10828 struct sockaddr_in *src_sin, *dst_sin;
10833 struct sockaddr_in6 *src_sin6, *dst_sin6;
10834 struct ip6_hdr *ip6;
10838 /* Compute the length of the cause and add final padding. */
10840 if (cause != NULL) {
10841 struct mbuf *m_at, *m_last = NULL;
10843 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10844 if (SCTP_BUF_NEXT(m_at) == NULL)
10846 cause_len += SCTP_BUF_LEN(m_at);
10848 padding_len = cause_len % 4;
10849 if (padding_len != 0) {
10850 padding_len = 4 - padding_len;
10852 if (padding_len != 0) {
10853 if (sctp_add_pad_tombuf(m_last, padding_len)) {
10854 sctp_m_freem(cause);
10861 /* Get an mbuf for the header. */
10862 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
10863 switch (dst->sa_family) {
10866 len += sizeof(struct ip);
10871 len += sizeof(struct ip6_hdr);
10878 len += sizeof(struct udphdr);
10880 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
10881 if (mout == NULL) {
10883 sctp_m_freem(cause);
10887 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10888 SCTP_BUF_LEN(mout) = len;
10889 SCTP_BUF_NEXT(mout) = cause;
10890 if (use_mflowid != 0) {
10891 mout->m_pkthdr.flowid = mflowid;
10892 mout->m_flags |= M_FLOWID;
10900 switch (dst->sa_family) {
10903 src_sin = (struct sockaddr_in *)src;
10904 dst_sin = (struct sockaddr_in *)dst;
10905 ip = mtod(mout, struct ip *);
10906 ip->ip_v = IPVERSION;
10907 ip->ip_hl = (sizeof(struct ip) >> 2);
10909 ip->ip_id = ip_newid();
10911 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
10913 ip->ip_p = IPPROTO_UDP;
10915 ip->ip_p = IPPROTO_SCTP;
10917 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
10918 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
10920 len = sizeof(struct ip);
10921 shout = (struct sctphdr *)((caddr_t)ip + len);
10926 src_sin6 = (struct sockaddr_in6 *)src;
10927 dst_sin6 = (struct sockaddr_in6 *)dst;
10928 ip6 = mtod(mout, struct ip6_hdr *);
10929 ip6->ip6_flow = htonl(0x60000000);
10930 if (V_ip6_auto_flowlabel) {
10931 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
10933 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
10935 ip6->ip6_nxt = IPPROTO_UDP;
10937 ip6->ip6_nxt = IPPROTO_SCTP;
10939 ip6->ip6_src = dst_sin6->sin6_addr;
10940 ip6->ip6_dst = src_sin6->sin6_addr;
10941 len = sizeof(struct ip6_hdr);
10942 shout = (struct sctphdr *)((caddr_t)ip6 + len);
10947 shout = mtod(mout, struct sctphdr *);
10951 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
10952 sctp_m_freem(mout);
10955 udp = (struct udphdr *)shout;
10956 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
10957 udp->uh_dport = port;
10959 udp->uh_ulen = htons(sizeof(struct udphdr) +
10960 sizeof(struct sctphdr) +
10961 sizeof(struct sctp_chunkhdr) +
10962 cause_len + padding_len);
10963 len += sizeof(struct udphdr);
10964 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
10968 shout->src_port = sh->dest_port;
10969 shout->dest_port = sh->src_port;
10970 shout->checksum = 0;
10972 shout->v_tag = htonl(vtag);
10974 shout->v_tag = sh->v_tag;
10976 len += sizeof(struct sctphdr);
10977 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
10978 ch->chunk_type = type;
10980 ch->chunk_flags = 0;
10982 ch->chunk_flags = SCTP_HAD_NO_TCB;
10984 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
10985 len += sizeof(struct sctp_chunkhdr);
10986 len += cause_len + padding_len;
10988 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
10989 sctp_m_freem(mout);
10992 SCTP_ATTACH_CHAIN(o_pak, mout, len);
10993 switch (dst->sa_family) {
10998 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11003 ip->ip_len = htons(len);
11005 #if defined(SCTP_WITH_NO_CSUM)
11006 SCTP_STAT_INCR(sctps_sendnocrc);
11008 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11009 SCTP_STAT_INCR(sctps_sendswcrc);
11012 SCTP_ENABLE_UDP_CSUM(o_pak);
11015 #if defined(SCTP_WITH_NO_CSUM)
11016 SCTP_STAT_INCR(sctps_sendnocrc);
11018 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11019 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11020 SCTP_STAT_INCR(sctps_sendhwcrc);
11023 #ifdef SCTP_PACKET_LOGGING
11024 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11025 sctp_packet_log(o_pak);
11028 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11033 ip6->ip6_plen = len - sizeof(struct ip6_hdr);
11035 #if defined(SCTP_WITH_NO_CSUM)
11036 SCTP_STAT_INCR(sctps_sendnocrc);
11038 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11039 SCTP_STAT_INCR(sctps_sendswcrc);
11041 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11042 udp->uh_sum = 0xffff;
11045 #if defined(SCTP_WITH_NO_CSUM)
11046 SCTP_STAT_INCR(sctps_sendnocrc);
11048 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11049 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11050 SCTP_STAT_INCR(sctps_sendhwcrc);
11053 #ifdef SCTP_PACKET_LOGGING
11054 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11055 sctp_packet_log(o_pak);
11058 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11062 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11064 sctp_m_freem(mout);
11065 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11068 SCTP_STAT_INCR(sctps_sendpackets);
11069 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11070 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11075 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11076 struct sctphdr *sh,
11077 uint8_t use_mflowid, uint32_t mflowid,
11078 uint32_t vrf_id, uint16_t port)
11080 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11081 use_mflowid, mflowid,
11086 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11087 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11092 struct sctp_tmit_chunk *chk;
11093 struct sctp_heartbeat_chunk *hb;
11094 struct timeval now;
11096 SCTP_TCB_LOCK_ASSERT(stcb);
11100 (void)SCTP_GETTIME_TIMEVAL(&now);
11101 switch (net->ro._l_addr.sa.sa_family) {
11113 sctp_alloc_a_chunk(stcb, chk);
11115 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11118 chk->copy_by_ref = 0;
11119 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11120 chk->rec.chunk_id.can_take_data = 1;
11121 chk->asoc = &stcb->asoc;
11122 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11124 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11125 if (chk->data == NULL) {
11126 sctp_free_a_chunk(stcb, chk, so_locked);
11129 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11130 SCTP_BUF_LEN(chk->data) = chk->send_size;
11131 chk->sent = SCTP_DATAGRAM_UNSENT;
11132 chk->snd_count = 0;
11134 atomic_add_int(&chk->whoTo->ref_count, 1);
11135 /* Now we have a mbuf that we can fill in with the details */
11136 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11137 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11138 /* fill out chunk header */
11139 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11140 hb->ch.chunk_flags = 0;
11141 hb->ch.chunk_length = htons(chk->send_size);
11142 /* Fill out hb parameter */
11143 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11144 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11145 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11146 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11147 /* Did our user request this one, put it in */
11148 hb->heartbeat.hb_info.addr_family = net->ro._l_addr.sa.sa_family;
11149 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11150 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11152 * we only take from the entropy pool if the address is not
11155 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11156 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11158 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11159 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11161 switch (net->ro._l_addr.sa.sa_family) {
11164 memcpy(hb->heartbeat.hb_info.address,
11165 &net->ro._l_addr.sin.sin_addr,
11166 sizeof(net->ro._l_addr.sin.sin_addr));
11171 memcpy(hb->heartbeat.hb_info.address,
11172 &net->ro._l_addr.sin6.sin6_addr,
11173 sizeof(net->ro._l_addr.sin6.sin6_addr));
11180 net->hb_responded = 0;
11181 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11182 stcb->asoc.ctrl_queue_cnt++;
11183 SCTP_STAT_INCR(sctps_sendheartbeat);
11188 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11191 struct sctp_association *asoc;
11192 struct sctp_ecne_chunk *ecne;
11193 struct sctp_tmit_chunk *chk;
11198 asoc = &stcb->asoc;
11199 SCTP_TCB_LOCK_ASSERT(stcb);
11200 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11201 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11202 /* found a previous ECN_ECHO update it if needed */
11203 uint32_t cnt, ctsn;
11205 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11206 ctsn = ntohl(ecne->tsn);
11207 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11208 ecne->tsn = htonl(high_tsn);
11209 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11211 cnt = ntohl(ecne->num_pkts_since_cwr);
11213 ecne->num_pkts_since_cwr = htonl(cnt);
11217 /* nope could not find one to update so we must build one */
11218 sctp_alloc_a_chunk(stcb, chk);
11222 chk->copy_by_ref = 0;
11223 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11224 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11225 chk->rec.chunk_id.can_take_data = 0;
11226 chk->asoc = &stcb->asoc;
11227 chk->send_size = sizeof(struct sctp_ecne_chunk);
11228 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11229 if (chk->data == NULL) {
11230 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11233 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11234 SCTP_BUF_LEN(chk->data) = chk->send_size;
11235 chk->sent = SCTP_DATAGRAM_UNSENT;
11236 chk->snd_count = 0;
11238 atomic_add_int(&chk->whoTo->ref_count, 1);
11240 stcb->asoc.ecn_echo_cnt_onq++;
11241 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11242 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11243 ecne->ch.chunk_flags = 0;
11244 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11245 ecne->tsn = htonl(high_tsn);
11246 ecne->num_pkts_since_cwr = htonl(1);
11247 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11248 asoc->ctrl_queue_cnt++;
11252 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11253 struct mbuf *m, int len, int iphlen, int bad_crc)
11255 struct sctp_association *asoc;
11256 struct sctp_pktdrop_chunk *drp;
11257 struct sctp_tmit_chunk *chk;
11263 struct sctp_chunkhdr *ch, chunk_buf;
11264 unsigned int chk_length;
11269 asoc = &stcb->asoc;
11270 SCTP_TCB_LOCK_ASSERT(stcb);
11271 if (asoc->peer_supports_pktdrop == 0) {
11273 * peer must declare support before I send one.
11277 if (stcb->sctp_socket == NULL) {
11280 sctp_alloc_a_chunk(stcb, chk);
11284 chk->copy_by_ref = 0;
11286 chk->send_size = len;
11287 /* Validate that we do not have an ABORT in here. */
11288 offset = iphlen + sizeof(struct sctphdr);
11289 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11290 sizeof(*ch), (uint8_t *) & chunk_buf);
11291 while (ch != NULL) {
11292 chk_length = ntohs(ch->chunk_length);
11293 if (chk_length < sizeof(*ch)) {
11294 /* break to abort land */
11297 switch (ch->chunk_type) {
11298 case SCTP_PACKET_DROPPED:
11299 case SCTP_ABORT_ASSOCIATION:
11300 case SCTP_INITIATION_ACK:
11302 * We don't respond with an PKT-DROP to an ABORT
11303 * or PKT-DROP. We also do not respond to an
11304 * INIT-ACK, because we can't know if the initiation
11305 * tag is correct or not.
11307 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11312 offset += SCTP_SIZE32(chk_length);
11313 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11314 sizeof(*ch), (uint8_t *) & chunk_buf);
11317 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11318 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11320 * only send 1 mtu worth, trim off the excess on the end.
11323 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11326 chk->asoc = &stcb->asoc;
11327 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11328 if (chk->data == NULL) {
11330 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11333 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11334 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11336 sctp_m_freem(chk->data);
11340 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11341 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11342 chk->book_size_scale = 0;
11344 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11345 drp->trunc_len = htons(fullsz);
11347 * Len is already adjusted to size minus overhead above take
11348 * out the pkt_drop chunk itself from it.
11350 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11351 len = chk->send_size;
11353 /* no truncation needed */
11354 drp->ch.chunk_flags = 0;
11355 drp->trunc_len = htons(0);
11358 drp->ch.chunk_flags |= SCTP_BADCRC;
11360 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11361 SCTP_BUF_LEN(chk->data) = chk->send_size;
11362 chk->sent = SCTP_DATAGRAM_UNSENT;
11363 chk->snd_count = 0;
11365 /* we should hit here */
11367 atomic_add_int(&chk->whoTo->ref_count, 1);
11371 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11372 chk->rec.chunk_id.can_take_data = 1;
11373 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11374 drp->ch.chunk_length = htons(chk->send_size);
11375 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11379 drp->bottle_bw = htonl(spc);
11380 if (asoc->my_rwnd) {
11381 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11382 asoc->size_on_all_streams +
11383 asoc->my_rwnd_control_len +
11384 stcb->sctp_socket->so_rcv.sb_cc);
11387 * If my rwnd is 0, possibly from mbuf depletion as well as
11388 * space used, tell the peer there is NO space aka onq == bw
11390 drp->current_onq = htonl(spc);
11394 m_copydata(m, iphlen, len, (caddr_t)datap);
11395 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11396 asoc->ctrl_queue_cnt++;
11400 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11402 struct sctp_association *asoc;
11403 struct sctp_cwr_chunk *cwr;
11404 struct sctp_tmit_chunk *chk;
11406 SCTP_TCB_LOCK_ASSERT(stcb);
11410 asoc = &stcb->asoc;
11411 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11412 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11414 * found a previous CWR queued to same destination
11415 * update it if needed
11419 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11420 ctsn = ntohl(cwr->tsn);
11421 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11422 cwr->tsn = htonl(high_tsn);
11424 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11425 /* Make sure override is carried */
11426 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11431 sctp_alloc_a_chunk(stcb, chk);
11435 chk->copy_by_ref = 0;
11436 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11437 chk->rec.chunk_id.can_take_data = 1;
11438 chk->asoc = &stcb->asoc;
11439 chk->send_size = sizeof(struct sctp_cwr_chunk);
11440 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11441 if (chk->data == NULL) {
11442 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11445 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11446 SCTP_BUF_LEN(chk->data) = chk->send_size;
11447 chk->sent = SCTP_DATAGRAM_UNSENT;
11448 chk->snd_count = 0;
11450 atomic_add_int(&chk->whoTo->ref_count, 1);
11451 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11452 cwr->ch.chunk_type = SCTP_ECN_CWR;
11453 cwr->ch.chunk_flags = override;
11454 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11455 cwr->tsn = htonl(high_tsn);
11456 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11457 asoc->ctrl_queue_cnt++;
11461 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11462 int number_entries, uint16_t * list,
11463 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11465 uint16_t len, old_len, i;
11466 struct sctp_stream_reset_out_request *req_out;
11467 struct sctp_chunkhdr *ch;
11469 ch = mtod(chk->data, struct sctp_chunkhdr *);
11470 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11472 /* get to new offset for the param. */
11473 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11474 /* now how long will this param be? */
11475 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11476 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11477 req_out->ph.param_length = htons(len);
11478 req_out->request_seq = htonl(seq);
11479 req_out->response_seq = htonl(resp_seq);
11480 req_out->send_reset_at_tsn = htonl(last_sent);
11481 if (number_entries) {
11482 for (i = 0; i < number_entries; i++) {
11483 req_out->list_of_streams[i] = htons(list[i]);
11486 if (SCTP_SIZE32(len) > len) {
11488 * Need to worry about the pad we may end up adding to the
11489 * end. This is easy since the struct is either aligned to 4
11490 * bytes or 2 bytes off.
11492 req_out->list_of_streams[number_entries] = 0;
11494 /* now fix the chunk length */
11495 ch->chunk_length = htons(len + old_len);
11496 chk->book_size = len + old_len;
11497 chk->book_size_scale = 0;
11498 chk->send_size = SCTP_SIZE32(chk->book_size);
11499 SCTP_BUF_LEN(chk->data) = chk->send_size;
11504 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11505 int number_entries, uint16_t * list,
11508 uint16_t len, old_len, i;
11509 struct sctp_stream_reset_in_request *req_in;
11510 struct sctp_chunkhdr *ch;
11512 ch = mtod(chk->data, struct sctp_chunkhdr *);
11513 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11515 /* get to new offset for the param. */
11516 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11517 /* now how long will this param be? */
11518 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11519 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11520 req_in->ph.param_length = htons(len);
11521 req_in->request_seq = htonl(seq);
11522 if (number_entries) {
11523 for (i = 0; i < number_entries; i++) {
11524 req_in->list_of_streams[i] = htons(list[i]);
11527 if (SCTP_SIZE32(len) > len) {
11529 * Need to worry about the pad we may end up adding to the
11530 * end. This is easy since the struct is either aligned to 4
11531 * bytes or 2 bytes off.
11533 req_in->list_of_streams[number_entries] = 0;
11535 /* now fix the chunk length */
11536 ch->chunk_length = htons(len + old_len);
11537 chk->book_size = len + old_len;
11538 chk->book_size_scale = 0;
11539 chk->send_size = SCTP_SIZE32(chk->book_size);
11540 SCTP_BUF_LEN(chk->data) = chk->send_size;
11545 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11548 uint16_t len, old_len;
11549 struct sctp_stream_reset_tsn_request *req_tsn;
11550 struct sctp_chunkhdr *ch;
11552 ch = mtod(chk->data, struct sctp_chunkhdr *);
11553 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11555 /* get to new offset for the param. */
11556 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11557 /* now how long will this param be? */
11558 len = sizeof(struct sctp_stream_reset_tsn_request);
11559 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11560 req_tsn->ph.param_length = htons(len);
11561 req_tsn->request_seq = htonl(seq);
11563 /* now fix the chunk length */
11564 ch->chunk_length = htons(len + old_len);
11565 chk->send_size = len + old_len;
11566 chk->book_size = SCTP_SIZE32(chk->send_size);
11567 chk->book_size_scale = 0;
11568 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11573 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11574 uint32_t resp_seq, uint32_t result)
11576 uint16_t len, old_len;
11577 struct sctp_stream_reset_response *resp;
11578 struct sctp_chunkhdr *ch;
11580 ch = mtod(chk->data, struct sctp_chunkhdr *);
11581 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11583 /* get to new offset for the param. */
11584 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11585 /* now how long will this param be? */
11586 len = sizeof(struct sctp_stream_reset_response);
11587 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11588 resp->ph.param_length = htons(len);
11589 resp->response_seq = htonl(resp_seq);
11590 resp->result = ntohl(result);
11592 /* now fix the chunk length */
11593 ch->chunk_length = htons(len + old_len);
11594 chk->book_size = len + old_len;
11595 chk->book_size_scale = 0;
11596 chk->send_size = SCTP_SIZE32(chk->book_size);
11597 SCTP_BUF_LEN(chk->data) = chk->send_size;
11602 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11603 uint32_t resp_seq, uint32_t result,
11604 uint32_t send_una, uint32_t recv_next)
11606 uint16_t len, old_len;
11607 struct sctp_stream_reset_response_tsn *resp;
11608 struct sctp_chunkhdr *ch;
11610 ch = mtod(chk->data, struct sctp_chunkhdr *);
11611 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11613 /* get to new offset for the param. */
11614 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11615 /* now how long will this param be? */
11616 len = sizeof(struct sctp_stream_reset_response_tsn);
11617 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11618 resp->ph.param_length = htons(len);
11619 resp->response_seq = htonl(resp_seq);
11620 resp->result = htonl(result);
11621 resp->senders_next_tsn = htonl(send_una);
11622 resp->receivers_next_tsn = htonl(recv_next);
11624 /* now fix the chunk length */
11625 ch->chunk_length = htons(len + old_len);
11626 chk->book_size = len + old_len;
11627 chk->send_size = SCTP_SIZE32(chk->book_size);
11628 chk->book_size_scale = 0;
11629 SCTP_BUF_LEN(chk->data) = chk->send_size;
11634 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11638 uint16_t len, old_len;
11639 struct sctp_chunkhdr *ch;
11640 struct sctp_stream_reset_add_strm *addstr;
11642 ch = mtod(chk->data, struct sctp_chunkhdr *);
11643 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11645 /* get to new offset for the param. */
11646 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11647 /* now how long will this param be? */
11648 len = sizeof(struct sctp_stream_reset_add_strm);
11651 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11652 addstr->ph.param_length = htons(len);
11653 addstr->request_seq = htonl(seq);
11654 addstr->number_of_streams = htons(adding);
11655 addstr->reserved = 0;
11657 /* now fix the chunk length */
11658 ch->chunk_length = htons(len + old_len);
11659 chk->send_size = len + old_len;
11660 chk->book_size = SCTP_SIZE32(chk->send_size);
11661 chk->book_size_scale = 0;
11662 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11667 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11671 uint16_t len, old_len;
11672 struct sctp_chunkhdr *ch;
11673 struct sctp_stream_reset_add_strm *addstr;
11675 ch = mtod(chk->data, struct sctp_chunkhdr *);
11676 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11678 /* get to new offset for the param. */
11679 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11680 /* now how long will this param be? */
11681 len = sizeof(struct sctp_stream_reset_add_strm);
11683 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11684 addstr->ph.param_length = htons(len);
11685 addstr->request_seq = htonl(seq);
11686 addstr->number_of_streams = htons(adding);
11687 addstr->reserved = 0;
11689 /* now fix the chunk length */
11690 ch->chunk_length = htons(len + old_len);
11691 chk->send_size = len + old_len;
11692 chk->book_size = SCTP_SIZE32(chk->send_size);
11693 chk->book_size_scale = 0;
11694 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11699 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11700 int number_entries, uint16_t * list,
11701 uint8_t send_out_req,
11702 uint8_t send_in_req,
11703 uint8_t send_tsn_req,
11704 uint8_t add_stream,
11706 uint16_t adding_i, uint8_t peer_asked)
11709 struct sctp_association *asoc;
11710 struct sctp_tmit_chunk *chk;
11711 struct sctp_chunkhdr *ch;
11714 asoc = &stcb->asoc;
11715 if (asoc->stream_reset_outstanding) {
11717 * Already one pending, must get ACK back to clear the flag.
11719 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11722 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11723 (add_stream == 0)) {
11724 /* nothing to do */
11725 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11728 if (send_tsn_req && (send_out_req || send_in_req)) {
11729 /* error, can't do that */
11730 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11733 sctp_alloc_a_chunk(stcb, chk);
11735 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11738 chk->copy_by_ref = 0;
11739 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11740 chk->rec.chunk_id.can_take_data = 0;
11741 chk->asoc = &stcb->asoc;
11742 chk->book_size = sizeof(struct sctp_chunkhdr);
11743 chk->send_size = SCTP_SIZE32(chk->book_size);
11744 chk->book_size_scale = 0;
11746 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11747 if (chk->data == NULL) {
11748 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11749 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11752 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11754 /* setup chunk parameters */
11755 chk->sent = SCTP_DATAGRAM_UNSENT;
11756 chk->snd_count = 0;
11757 if (stcb->asoc.alternate) {
11758 chk->whoTo = stcb->asoc.alternate;
11760 chk->whoTo = stcb->asoc.primary_destination;
11762 atomic_add_int(&chk->whoTo->ref_count, 1);
11763 ch = mtod(chk->data, struct sctp_chunkhdr *);
11764 ch->chunk_type = SCTP_STREAM_RESET;
11765 ch->chunk_flags = 0;
11766 ch->chunk_length = htons(chk->book_size);
11767 SCTP_BUF_LEN(chk->data) = chk->send_size;
11769 seq = stcb->asoc.str_reset_seq_out;
11770 if (send_out_req) {
11771 sctp_add_stream_reset_out(chk, number_entries, list,
11772 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
11773 asoc->stream_reset_out_is_outstanding = 1;
11775 asoc->stream_reset_outstanding++;
11777 if ((add_stream & 1) &&
11778 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
11779 /* Need to allocate more */
11780 struct sctp_stream_out *oldstream;
11781 struct sctp_stream_queue_pending *sp, *nsp;
11784 oldstream = stcb->asoc.strmout;
11785 /* get some more */
11786 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
11787 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)),
11789 if (stcb->asoc.strmout == NULL) {
11792 stcb->asoc.strmout = oldstream;
11793 /* Turn off the bit */
11794 x = add_stream & 0xfe;
11799 * Ok now we proceed with copying the old out stuff and
11800 * initializing the new stuff.
11802 SCTP_TCB_SEND_LOCK(stcb);
11803 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
11804 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11805 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11806 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
11807 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
11808 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
11809 stcb->asoc.strmout[i].stream_no = i;
11810 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
11811 /* now anything on those queues? */
11812 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
11813 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
11814 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
11816 /* Now move assoc pointers too */
11817 if (stcb->asoc.last_out_stream == &oldstream[i]) {
11818 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
11820 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
11821 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
11824 /* now the new streams */
11825 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
11826 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
11827 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11828 stcb->asoc.strmout[i].chunks_on_queues = 0;
11829 stcb->asoc.strmout[i].next_sequence_send = 0x0;
11830 stcb->asoc.strmout[i].stream_no = i;
11831 stcb->asoc.strmout[i].last_msg_incomplete = 0;
11832 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
11834 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
11835 SCTP_FREE(oldstream, SCTP_M_STRMO);
11836 SCTP_TCB_SEND_UNLOCK(stcb);
11839 if ((add_stream & 1) && (adding_o > 0)) {
11840 asoc->strm_pending_add_size = adding_o;
11841 asoc->peer_req_out = peer_asked;
11842 sctp_add_an_out_stream(chk, seq, adding_o);
11844 asoc->stream_reset_outstanding++;
11846 if ((add_stream & 2) && (adding_i > 0)) {
11847 sctp_add_an_in_stream(chk, seq, adding_i);
11849 asoc->stream_reset_outstanding++;
11852 sctp_add_stream_reset_in(chk, number_entries, list, seq);
11854 asoc->stream_reset_outstanding++;
11856 if (send_tsn_req) {
11857 sctp_add_stream_reset_tsn(chk, seq);
11858 asoc->stream_reset_outstanding++;
11860 asoc->str_reset = chk;
11861 /* insert the chunk for sending */
11862 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11865 asoc->ctrl_queue_cnt++;
11866 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11871 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
11872 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
11873 uint8_t use_mflowid, uint32_t mflowid,
11874 uint32_t vrf_id, uint16_t port)
11876 /* Don't respond to an ABORT with an ABORT. */
11877 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
11879 sctp_m_freem(cause);
11882 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
11883 use_mflowid, mflowid,
11889 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
11890 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
11891 uint8_t use_mflowid, uint32_t mflowid,
11892 uint32_t vrf_id, uint16_t port)
11894 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
11895 use_mflowid, mflowid,
11900 static struct mbuf *
11901 sctp_copy_resume(struct uio *uio,
11903 int user_marks_eor,
11906 struct mbuf **new_tail)
11910 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
11911 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
11913 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11916 *sndout = m_length(m, NULL);
11917 *new_tail = m_last(m);
11923 sctp_copy_one(struct sctp_stream_queue_pending *sp,
11930 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
11932 if (sp->data == NULL) {
11933 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11936 sp->tail_mbuf = m_last(sp->data);
11942 static struct sctp_stream_queue_pending *
11943 sctp_copy_it_in(struct sctp_tcb *stcb,
11944 struct sctp_association *asoc,
11945 struct sctp_sndrcvinfo *srcv,
11947 struct sctp_nets *net,
11949 int user_marks_eor,
11953 * This routine must be very careful in its work. Protocol
11954 * processing is up and running so care must be taken to spl...()
11955 * when you need to do something that may effect the stcb/asoc. The
11956 * sb is locked however. When data is copied the protocol processing
11957 * should be enabled since this is a slower operation...
11959 struct sctp_stream_queue_pending *sp = NULL;
11963 /* Now can we send this? */
11964 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
11965 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
11966 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
11967 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
11968 /* got data while shutting down */
11969 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
11970 *error = ECONNRESET;
11973 sctp_alloc_a_strmoq(stcb, sp);
11975 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11980 sp->sender_all_done = 0;
11981 sp->sinfo_flags = srcv->sinfo_flags;
11982 sp->timetolive = srcv->sinfo_timetolive;
11983 sp->ppid = srcv->sinfo_ppid;
11984 sp->context = srcv->sinfo_context;
11985 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
11987 sp->stream = srcv->sinfo_stream;
11988 sp->length = min(uio->uio_resid, max_send_len);
11989 if ((sp->length == (uint32_t) uio->uio_resid) &&
11990 ((user_marks_eor == 0) ||
11991 (srcv->sinfo_flags & SCTP_EOF) ||
11992 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
11993 sp->msg_is_complete = 1;
11995 sp->msg_is_complete = 0;
11997 sp->sender_all_done = 0;
11998 sp->some_taken = 0;
11999 sp->put_last_out = 0;
12000 resv_in_first = sizeof(struct sctp_data_chunk);
12001 sp->data = sp->tail_mbuf = NULL;
12002 if (sp->length == 0) {
12006 if (srcv->sinfo_keynumber_valid) {
12007 sp->auth_keyid = srcv->sinfo_keynumber;
12009 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12011 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12012 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12013 sp->holds_key_ref = 1;
12015 *error = sctp_copy_one(sp, uio, resv_in_first);
12018 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12021 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12023 atomic_add_int(&sp->net->ref_count, 1);
12027 sctp_set_prsctp_policy(sp);
12035 sctp_sosend(struct socket *so,
12036 struct sockaddr *addr,
12039 struct mbuf *control,
12044 int error, use_sndinfo = 0;
12045 struct sctp_sndrcvinfo sndrcvninfo;
12046 struct sockaddr *addr_to_use;
12048 #if defined(INET) && defined(INET6)
12049 struct sockaddr_in sin;
12054 /* process cmsg snd/rcv info (maybe a assoc-id) */
12055 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12056 sizeof(sndrcvninfo))) {
12061 addr_to_use = addr;
12062 #if defined(INET) && defined(INET6)
12063 if ((addr) && (addr->sa_family == AF_INET6)) {
12064 struct sockaddr_in6 *sin6;
12066 sin6 = (struct sockaddr_in6 *)addr;
12067 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12068 in6_sin6_2_sin(&sin, sin6);
12069 addr_to_use = (struct sockaddr *)&sin;
12073 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12076 use_sndinfo ? &sndrcvninfo : NULL
12084 sctp_lower_sosend(struct socket *so,
12085 struct sockaddr *addr,
12087 struct mbuf *i_pak,
12088 struct mbuf *control,
12090 struct sctp_sndrcvinfo *srcv
12095 unsigned int sndlen = 0, max_len;
12097 struct mbuf *top = NULL;
12098 int queue_only = 0, queue_only_for_init = 0;
12099 int free_cnt_applied = 0;
12101 int now_filled = 0;
12102 unsigned int inqueue_bytes = 0;
12103 struct sctp_block_entry be;
12104 struct sctp_inpcb *inp;
12105 struct sctp_tcb *stcb = NULL;
12106 struct timeval now;
12107 struct sctp_nets *net;
12108 struct sctp_association *asoc;
12109 struct sctp_inpcb *t_inp;
12110 int user_marks_eor;
12111 int create_lock_applied = 0;
12112 int nagle_applies = 0;
12113 int some_on_control = 0;
12114 int got_all_of_the_send = 0;
12115 int hold_tcblock = 0;
12116 int non_blocking = 0;
12117 uint32_t local_add_more, local_soresv = 0;
12119 uint16_t sinfo_flags;
12120 sctp_assoc_t sinfo_assoc_id;
12127 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12129 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12132 SCTP_RELEASE_PKT(i_pak);
12136 if ((uio == NULL) && (i_pak == NULL)) {
12137 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12140 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12141 atomic_add_int(&inp->total_sends, 1);
12143 if (uio->uio_resid < 0) {
12144 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12147 sndlen = uio->uio_resid;
12149 top = SCTP_HEADER_TO_CHAIN(i_pak);
12150 sndlen = SCTP_HEADER_LEN(i_pak);
12152 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12155 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12156 (inp->sctp_socket->so_qlimit)) {
12157 /* The listener can NOT send */
12158 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12163 * Pre-screen address, if one is given the sin-len
12164 * must be set correctly!
12167 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12169 switch (raddr->sa.sa_family) {
12172 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12173 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12177 port = raddr->sin.sin_port;
12182 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12183 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12187 port = raddr->sin6.sin6_port;
12191 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12192 error = EAFNOSUPPORT;
12199 sinfo_flags = srcv->sinfo_flags;
12200 sinfo_assoc_id = srcv->sinfo_assoc_id;
12201 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12202 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12203 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12207 if (srcv->sinfo_flags)
12208 SCTP_STAT_INCR(sctps_sends_with_flags);
12210 sinfo_flags = inp->def_send.sinfo_flags;
12211 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12213 if (sinfo_flags & SCTP_SENDALL) {
12214 /* its a sendall */
12215 error = sctp_sendall(inp, uio, top, srcv);
12219 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12220 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12224 /* now we must find the assoc */
12225 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12226 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12227 SCTP_INP_RLOCK(inp);
12228 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12230 SCTP_TCB_LOCK(stcb);
12233 SCTP_INP_RUNLOCK(inp);
12234 } else if (sinfo_assoc_id) {
12235 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12238 * Since we did not use findep we must
12239 * increment it, and if we don't find a tcb
12242 SCTP_INP_WLOCK(inp);
12243 SCTP_INP_INCR_REF(inp);
12244 SCTP_INP_WUNLOCK(inp);
12245 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12246 if (stcb == NULL) {
12247 SCTP_INP_WLOCK(inp);
12248 SCTP_INP_DECR_REF(inp);
12249 SCTP_INP_WUNLOCK(inp);
12254 if ((stcb == NULL) && (addr)) {
12255 /* Possible implicit send? */
12256 SCTP_ASOC_CREATE_LOCK(inp);
12257 create_lock_applied = 1;
12258 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12259 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12260 /* Should I really unlock ? */
12261 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12266 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12267 (addr->sa_family == AF_INET6)) {
12268 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12272 SCTP_INP_WLOCK(inp);
12273 SCTP_INP_INCR_REF(inp);
12274 SCTP_INP_WUNLOCK(inp);
12275 /* With the lock applied look again */
12276 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12277 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12278 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12280 if (stcb == NULL) {
12281 SCTP_INP_WLOCK(inp);
12282 SCTP_INP_DECR_REF(inp);
12283 SCTP_INP_WUNLOCK(inp);
12290 if (t_inp != inp) {
12291 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12296 if (stcb == NULL) {
12297 if (addr == NULL) {
12298 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12302 /* We must go ahead and start the INIT process */
12305 if ((sinfo_flags & SCTP_ABORT) ||
12306 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12308 * User asks to abort a non-existant assoc,
12309 * or EOF a non-existant assoc with no data
12311 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12315 /* get an asoc/stcb struct */
12316 vrf_id = inp->def_vrf_id;
12318 if (create_lock_applied == 0) {
12319 panic("Error, should hold create lock and I don't?");
12322 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12325 if (stcb == NULL) {
12326 /* Error is setup for us in the call */
12329 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12330 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12332 * Set the connected flag so we can queue
12335 soisconnecting(so);
12338 if (create_lock_applied) {
12339 SCTP_ASOC_CREATE_UNLOCK(inp);
12340 create_lock_applied = 0;
12342 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12345 * Turn on queue only flag to prevent data from
12349 asoc = &stcb->asoc;
12350 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12351 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12353 /* initialize authentication params for the assoc */
12354 sctp_initialize_auth_params(inp, stcb);
12357 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12358 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7);
12364 /* out with the INIT */
12365 queue_only_for_init = 1;
12367 * we may want to dig in after this call and adjust the MTU
12368 * value. It defaulted to 1500 (constant) but the ro
12369 * structure may now have an update and thus we may need to
12370 * change it BEFORE we append the message.
12374 asoc = &stcb->asoc;
12376 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12377 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12379 net = sctp_findnet(stcb, addr);
12382 if ((net == NULL) ||
12383 ((port != 0) && (port != stcb->rport))) {
12384 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12389 if (stcb->asoc.alternate) {
12390 net = stcb->asoc.alternate;
12392 net = stcb->asoc.primary_destination;
12395 atomic_add_int(&stcb->total_sends, 1);
12396 /* Keep the stcb from being freed under our feet */
12397 atomic_add_int(&asoc->refcnt, 1);
12398 free_cnt_applied = 1;
12400 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12401 if (sndlen > asoc->smallest_mtu) {
12402 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12407 if (SCTP_SO_IS_NBIO(so)
12408 || (flags & MSG_NBIO)
12412 /* would we block? */
12413 if (non_blocking) {
12414 if (hold_tcblock == 0) {
12415 SCTP_TCB_LOCK(stcb);
12418 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12419 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12420 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12421 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12422 if (sndlen > SCTP_SB_LIMIT_SND(so))
12425 error = EWOULDBLOCK;
12428 stcb->asoc.sb_send_resv += sndlen;
12429 SCTP_TCB_UNLOCK(stcb);
12432 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12434 local_soresv = sndlen;
12435 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12436 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12437 error = ECONNRESET;
12440 if (create_lock_applied) {
12441 SCTP_ASOC_CREATE_UNLOCK(inp);
12442 create_lock_applied = 0;
12444 if (asoc->stream_reset_outstanding) {
12446 * Can't queue any data while stream reset is underway.
12448 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
12452 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12453 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12456 /* we are now done with all control */
12458 sctp_m_freem(control);
12461 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12462 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12463 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12464 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12465 if (srcv->sinfo_flags & SCTP_ABORT) {
12468 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12469 error = ECONNRESET;
12473 /* Ok, we will attempt a msgsnd :> */
12475 p->td_ru.ru_msgsnd++;
12477 /* Are we aborting? */
12478 if (srcv->sinfo_flags & SCTP_ABORT) {
12480 int tot_demand, tot_out = 0, max_out;
12482 SCTP_STAT_INCR(sctps_sends_with_abort);
12483 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12484 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12485 /* It has to be up before we abort */
12486 /* how big is the user initiated abort? */
12487 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12491 if (hold_tcblock) {
12492 SCTP_TCB_UNLOCK(stcb);
12496 struct mbuf *cntm = NULL;
12498 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12500 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12501 tot_out += SCTP_BUF_LEN(cntm);
12505 /* Must fit in a MTU */
12507 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12508 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12510 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12514 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12517 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12521 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12522 max_out -= sizeof(struct sctp_abort_msg);
12523 if (tot_out > max_out) {
12527 struct sctp_paramhdr *ph;
12529 /* now move forward the data pointer */
12530 ph = mtod(mm, struct sctp_paramhdr *);
12531 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12532 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
12534 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12536 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12539 * Here if we can't get his data we
12540 * still abort we just don't get to
12541 * send the users note :-0
12548 SCTP_BUF_NEXT(mm) = top;
12552 if (hold_tcblock == 0) {
12553 SCTP_TCB_LOCK(stcb);
12555 atomic_add_int(&stcb->asoc.refcnt, -1);
12556 free_cnt_applied = 0;
12557 /* release this lock, otherwise we hang on ourselves */
12558 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12559 /* now relock the stcb so everything is sane */
12563 * In this case top is already chained to mm avoid double
12564 * free, since we free it below if top != NULL and driver
12565 * would free it after sending the packet out
12572 /* Calculate the maximum we can send */
12573 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12574 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12575 if (non_blocking) {
12576 /* we already checked for non-blocking above. */
12579 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12584 if (hold_tcblock) {
12585 SCTP_TCB_UNLOCK(stcb);
12588 /* Is the stream no. valid? */
12589 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12590 /* Invalid stream number */
12591 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12595 if (asoc->strmout == NULL) {
12596 /* huh? software error */
12597 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12601 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12602 if ((user_marks_eor == 0) &&
12603 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12604 /* It will NEVER fit */
12605 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12609 if ((uio == NULL) && user_marks_eor) {
12611 * We do not support eeor mode for
12612 * sending with mbuf chains (like sendfile).
12614 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12618 if (user_marks_eor) {
12619 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12622 * For non-eeor the whole message must fit in
12623 * the socket send buffer.
12625 local_add_more = sndlen;
12628 if (non_blocking) {
12629 goto skip_preblock;
12631 if (((max_len <= local_add_more) &&
12632 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12634 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12635 /* No room right now ! */
12636 SOCKBUF_LOCK(&so->so_snd);
12637 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12638 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12639 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12640 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12641 (unsigned int)SCTP_SB_LIMIT_SND(so),
12644 stcb->asoc.stream_queue_cnt,
12645 stcb->asoc.chunks_on_out_queue,
12646 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12647 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12648 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
12651 stcb->block_entry = &be;
12652 error = sbwait(&so->so_snd);
12653 stcb->block_entry = NULL;
12654 if (error || so->so_error || be.error) {
12657 error = so->so_error;
12662 SOCKBUF_UNLOCK(&so->so_snd);
12665 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12666 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12667 asoc, stcb->asoc.total_output_queue_size);
12669 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12672 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12674 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12675 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12679 SOCKBUF_UNLOCK(&so->so_snd);
12682 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12686 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
12687 * case NOTE: uio will be null when top/mbuf is passed
12690 if (srcv->sinfo_flags & SCTP_EOF) {
12691 got_all_of_the_send = 1;
12694 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12700 struct sctp_stream_queue_pending *sp;
12701 struct sctp_stream_out *strm;
12704 SCTP_TCB_SEND_LOCK(stcb);
12705 if ((asoc->stream_locked) &&
12706 (asoc->stream_locked_on != srcv->sinfo_stream)) {
12707 SCTP_TCB_SEND_UNLOCK(stcb);
12708 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12712 SCTP_TCB_SEND_UNLOCK(stcb);
12714 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
12715 if (strm->last_msg_incomplete == 0) {
12717 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
12718 if ((sp == NULL) || (error)) {
12721 SCTP_TCB_SEND_LOCK(stcb);
12722 if (sp->msg_is_complete) {
12723 strm->last_msg_incomplete = 0;
12724 asoc->stream_locked = 0;
12727 * Just got locked to this guy in case of an
12730 strm->last_msg_incomplete = 1;
12731 asoc->stream_locked = 1;
12732 asoc->stream_locked_on = srcv->sinfo_stream;
12733 sp->sender_all_done = 0;
12735 sctp_snd_sb_alloc(stcb, sp->length);
12736 atomic_add_int(&asoc->stream_queue_cnt, 1);
12737 if (srcv->sinfo_flags & SCTP_UNORDERED) {
12738 SCTP_STAT_INCR(sctps_sends_with_unord);
12740 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
12741 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
12742 SCTP_TCB_SEND_UNLOCK(stcb);
12744 SCTP_TCB_SEND_LOCK(stcb);
12745 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
12746 SCTP_TCB_SEND_UNLOCK(stcb);
12748 /* ???? Huh ??? last msg is gone */
12750 panic("Warning: Last msg marked incomplete, yet nothing left?");
12752 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
12753 strm->last_msg_incomplete = 0;
12759 while (uio->uio_resid > 0) {
12760 /* How much room do we have? */
12761 struct mbuf *new_tail, *mm;
12763 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12764 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
12768 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
12769 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
12770 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
12773 if (hold_tcblock) {
12774 SCTP_TCB_UNLOCK(stcb);
12777 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
12778 if ((mm == NULL) || error) {
12784 /* Update the mbuf and count */
12785 SCTP_TCB_SEND_LOCK(stcb);
12786 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12788 * we need to get out. Peer probably
12792 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
12793 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12794 error = ECONNRESET;
12796 SCTP_TCB_SEND_UNLOCK(stcb);
12799 if (sp->tail_mbuf) {
12800 /* tack it to the end */
12801 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
12802 sp->tail_mbuf = new_tail;
12804 /* A stolen mbuf */
12806 sp->tail_mbuf = new_tail;
12808 sctp_snd_sb_alloc(stcb, sndout);
12809 atomic_add_int(&sp->length, sndout);
12812 /* Did we reach EOR? */
12813 if ((uio->uio_resid == 0) &&
12814 ((user_marks_eor == 0) ||
12815 (srcv->sinfo_flags & SCTP_EOF) ||
12816 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12817 sp->msg_is_complete = 1;
12819 sp->msg_is_complete = 0;
12821 SCTP_TCB_SEND_UNLOCK(stcb);
12823 if (uio->uio_resid == 0) {
12828 if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
12830 * This is ugly but we must assure locking
12833 if (hold_tcblock == 0) {
12834 SCTP_TCB_LOCK(stcb);
12837 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
12838 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12839 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12840 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12846 SCTP_TCB_UNLOCK(stcb);
12849 /* wait for space now */
12850 if (non_blocking) {
12851 /* Non-blocking io in place out */
12854 /* What about the INIT, send it maybe */
12855 if (queue_only_for_init) {
12856 if (hold_tcblock == 0) {
12857 SCTP_TCB_LOCK(stcb);
12860 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
12861 /* a collision took us forward? */
12864 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
12865 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12869 if ((net->flight_size > net->cwnd) &&
12870 (asoc->sctp_cmt_on_off == 0)) {
12871 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
12873 } else if (asoc->ifp_had_enobuf) {
12874 SCTP_STAT_INCR(sctps_ifnomemqueued);
12875 if (net->flight_size > (2 * net->mtu)) {
12878 asoc->ifp_had_enobuf = 0;
12880 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
12881 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
12882 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
12883 (stcb->asoc.total_flight > 0) &&
12884 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
12885 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
12888 * Ok, Nagle is set on and we have data outstanding.
12889 * Don't send anything and let SACKs drive out the
12890 * data unless wen have a "full" segment to send.
12892 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12893 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
12895 SCTP_STAT_INCR(sctps_naglequeued);
12898 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12899 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
12900 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
12902 SCTP_STAT_INCR(sctps_naglesent);
12905 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12907 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
12908 nagle_applies, un_sent);
12909 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
12910 stcb->asoc.total_flight,
12911 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
12913 if (queue_only_for_init)
12914 queue_only_for_init = 0;
12915 if ((queue_only == 0) && (nagle_applies == 0)) {
12917 * need to start chunk output
12918 * before blocking.. note that if
12919 * a lock is already applied, then
12920 * the input via the net is happening
12921 * and I don't need to start output :-D
12923 if (hold_tcblock == 0) {
12924 if (SCTP_TCB_TRYLOCK(stcb)) {
12926 sctp_chunk_output(inp,
12928 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
12931 sctp_chunk_output(inp,
12933 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
12935 if (hold_tcblock == 1) {
12936 SCTP_TCB_UNLOCK(stcb);
12940 SOCKBUF_LOCK(&so->so_snd);
12942 * This is a bit strange, but I think it will
12943 * work. The total_output_queue_size is locked and
12944 * protected by the TCB_LOCK, which we just released.
12945 * There is a race that can occur between releasing it
12946 * above, and me getting the socket lock, where sacks
12947 * come in but we have not put the SB_WAIT on the
12948 * so_snd buffer to get the wakeup. After the LOCK
12949 * is applied the sack_processing will also need to
12950 * LOCK the so->so_snd to do the actual sowwakeup(). So
12951 * once we have the socket buffer lock if we recheck the
12952 * size we KNOW we will get to sleep safely with the
12953 * wakeup flag in place.
12955 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
12956 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
12957 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12958 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
12959 asoc, uio->uio_resid);
12962 stcb->block_entry = &be;
12963 error = sbwait(&so->so_snd);
12964 stcb->block_entry = NULL;
12966 if (error || so->so_error || be.error) {
12969 error = so->so_error;
12974 SOCKBUF_UNLOCK(&so->so_snd);
12977 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12978 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12979 asoc, stcb->asoc.total_output_queue_size);
12982 SOCKBUF_UNLOCK(&so->so_snd);
12983 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12987 SCTP_TCB_SEND_LOCK(stcb);
12989 if (sp->msg_is_complete == 0) {
12990 strm->last_msg_incomplete = 1;
12991 asoc->stream_locked = 1;
12992 asoc->stream_locked_on = srcv->sinfo_stream;
12994 sp->sender_all_done = 1;
12995 strm->last_msg_incomplete = 0;
12996 asoc->stream_locked = 0;
12999 SCTP_PRINTF("Huh no sp TSNH?\n");
13000 strm->last_msg_incomplete = 0;
13001 asoc->stream_locked = 0;
13003 SCTP_TCB_SEND_UNLOCK(stcb);
13004 if (uio->uio_resid == 0) {
13005 got_all_of_the_send = 1;
13008 /* We send in a 0, since we do NOT have any locks */
13009 error = sctp_msg_append(stcb, net, top, srcv, 0);
13011 if (srcv->sinfo_flags & SCTP_EOF) {
13013 * This should only happen for Panda for the mbuf
13014 * send case, which does NOT yet support EEOR mode.
13015 * Thus, we can just set this flag to do the proper
13018 got_all_of_the_send = 1;
13026 if ((srcv->sinfo_flags & SCTP_EOF) &&
13027 (got_all_of_the_send == 1)) {
13030 SCTP_STAT_INCR(sctps_sends_with_eof);
13032 if (hold_tcblock == 0) {
13033 SCTP_TCB_LOCK(stcb);
13036 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13037 if (TAILQ_EMPTY(&asoc->send_queue) &&
13038 TAILQ_EMPTY(&asoc->sent_queue) &&
13040 if (asoc->locked_on_sending) {
13043 /* there is nothing queued to send, so I'm done... */
13044 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13045 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13046 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13047 struct sctp_nets *netp;
13049 /* only send SHUTDOWN the first time through */
13050 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13051 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13053 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13054 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13055 sctp_stop_timers_for_shutdown(stcb);
13056 if (stcb->asoc.alternate) {
13057 netp = stcb->asoc.alternate;
13059 netp = stcb->asoc.primary_destination;
13061 sctp_send_shutdown(stcb, netp);
13062 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13064 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13065 asoc->primary_destination);
13069 * we still got (or just got) data to send, so set
13073 * XXX sockets draft says that SCTP_EOF should be
13074 * sent with no data. currently, we will allow user
13075 * data to be sent first and move to
13078 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13079 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13080 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13081 if (hold_tcblock == 0) {
13082 SCTP_TCB_LOCK(stcb);
13085 if (asoc->locked_on_sending) {
13086 /* Locked to send out the data */
13087 struct sctp_stream_queue_pending *sp;
13089 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13091 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13092 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13095 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13096 if (TAILQ_EMPTY(&asoc->send_queue) &&
13097 TAILQ_EMPTY(&asoc->sent_queue) &&
13098 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13100 if (free_cnt_applied) {
13101 atomic_add_int(&stcb->asoc.refcnt, -1);
13102 free_cnt_applied = 0;
13104 sctp_abort_an_association(stcb->sctp_ep, stcb,
13105 NULL, SCTP_SO_LOCKED);
13107 * now relock the stcb so everything
13114 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13115 asoc->primary_destination);
13116 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13121 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13122 some_on_control = 1;
13124 if (queue_only_for_init) {
13125 if (hold_tcblock == 0) {
13126 SCTP_TCB_LOCK(stcb);
13129 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13130 /* a collision took us forward? */
13133 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13134 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13138 if ((net->flight_size > net->cwnd) &&
13139 (stcb->asoc.sctp_cmt_on_off == 0)) {
13140 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13142 } else if (asoc->ifp_had_enobuf) {
13143 SCTP_STAT_INCR(sctps_ifnomemqueued);
13144 if (net->flight_size > (2 * net->mtu)) {
13147 asoc->ifp_had_enobuf = 0;
13149 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13150 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13151 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13152 (stcb->asoc.total_flight > 0) &&
13153 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13154 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13156 * Ok, Nagle is set on and we have data outstanding.
13157 * Don't send anything and let SACKs drive out the
13158 * data unless wen have a "full" segment to send.
13160 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13161 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13163 SCTP_STAT_INCR(sctps_naglequeued);
13166 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13167 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13168 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13170 SCTP_STAT_INCR(sctps_naglesent);
13173 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13174 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13175 nagle_applies, un_sent);
13176 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13177 stcb->asoc.total_flight,
13178 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13180 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13181 /* we can attempt to send too. */
13182 if (hold_tcblock == 0) {
13184 * If there is activity recv'ing sacks no need to
13187 if (SCTP_TCB_TRYLOCK(stcb)) {
13188 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13192 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13194 } else if ((queue_only == 0) &&
13195 (stcb->asoc.peers_rwnd == 0) &&
13196 (stcb->asoc.total_flight == 0)) {
13197 /* We get to have a probe outstanding */
13198 if (hold_tcblock == 0) {
13200 SCTP_TCB_LOCK(stcb);
13202 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13203 } else if (some_on_control) {
13204 int num_out, reason, frag_point;
13206 /* Here we do control only */
13207 if (hold_tcblock == 0) {
13209 SCTP_TCB_LOCK(stcb);
13211 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13212 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13213 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13215 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13216 queue_only, stcb->asoc.peers_rwnd, un_sent,
13217 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13218 stcb->asoc.total_output_queue_size, error);
13223 if (local_soresv && stcb) {
13224 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13226 if (create_lock_applied) {
13227 SCTP_ASOC_CREATE_UNLOCK(inp);
13229 if ((stcb) && hold_tcblock) {
13230 SCTP_TCB_UNLOCK(stcb);
13232 if (stcb && free_cnt_applied) {
13233 atomic_add_int(&stcb->asoc.refcnt, -1);
13237 if (mtx_owned(&stcb->tcb_mtx)) {
13238 panic("Leaving with tcb mtx owned?");
13240 if (mtx_owned(&stcb->tcb_send_mtx)) {
13241 panic("Leaving with tcb send mtx owned?");
13247 sctp_validate_no_locks(inp);
13249 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
13256 sctp_m_freem(control);
13263 * generate an AUTHentication chunk, if required
13266 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13267 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13268 struct sctp_tcb *stcb, uint8_t chunk)
13270 struct mbuf *m_auth;
13271 struct sctp_auth_chunk *auth;
13275 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13279 /* sysctl disabled auth? */
13280 if (SCTP_BASE_SYSCTL(sctp_auth_disable))
13283 /* peer doesn't do auth... */
13284 if (!stcb->asoc.peer_supports_auth) {
13287 /* does the requested chunk require auth? */
13288 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13291 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13292 if (m_auth == NULL) {
13296 /* reserve some space if this will be the first mbuf */
13298 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13299 /* fill in the AUTH chunk details */
13300 auth = mtod(m_auth, struct sctp_auth_chunk *);
13301 bzero(auth, sizeof(*auth));
13302 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13303 auth->ch.chunk_flags = 0;
13304 chunk_len = sizeof(*auth) +
13305 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13306 auth->ch.chunk_length = htons(chunk_len);
13307 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13308 /* key id and hmac digest will be computed and filled in upon send */
13310 /* save the offset where the auth was inserted into the chain */
13312 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13313 *offset += SCTP_BUF_LEN(cn);
13316 /* update length and return pointer to the auth chunk */
13317 SCTP_BUF_LEN(m_auth) = chunk_len;
13318 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13319 if (auth_ret != NULL)
13327 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13329 struct nd_prefix *pfx = NULL;
13330 struct nd_pfxrouter *pfxrtr = NULL;
13331 struct sockaddr_in6 gw6;
13333 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13336 /* get prefix entry of address */
13337 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13338 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13340 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13341 &src6->sin6_addr, &pfx->ndpr_mask))
13344 /* no prefix entry in the prefix list */
13346 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13347 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13350 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13351 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13353 /* search installed gateway from prefix entry */
13354 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13355 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13356 gw6.sin6_family = AF_INET6;
13357 gw6.sin6_len = sizeof(struct sockaddr_in6);
13358 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13359 sizeof(struct in6_addr));
13360 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13361 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13362 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13363 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13364 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13365 ro->ro_rt->rt_gateway)) {
13366 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13370 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13377 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13380 struct sockaddr_in *sin, *mask;
13381 struct ifaddr *ifa;
13382 struct in_addr srcnetaddr, gwnetaddr;
13384 if (ro == NULL || ro->ro_rt == NULL ||
13385 sifa->address.sa.sa_family != AF_INET) {
13388 ifa = (struct ifaddr *)sifa->ifa;
13389 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13390 sin = (struct sockaddr_in *)&sifa->address.sin;
13391 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13392 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13393 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13394 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13396 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13397 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13398 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13399 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13400 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13401 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {