2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <netinet/sctp_os.h>
38 #include <netinet/sctp_var.h>
39 #include <netinet/sctp_sysctl.h>
40 #include <netinet/sctp_header.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctputil.h>
43 #include <netinet/sctp_output.h>
44 #include <netinet/sctp_uio.h>
45 #include <netinet/sctputil.h>
46 #include <netinet/sctp_auth.h>
47 #include <netinet/sctp_timer.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_indata.h>
50 #include <netinet/sctp_bsd_addr.h>
51 #include <netinet/sctp_input.h>
52 #include <netinet/sctp_crc32.h>
53 #include <netinet/udp.h>
54 #include <netinet/udp_var.h>
55 #include <machine/in_cksum.h>
59 #define SCTP_MAX_GAPS_INARRAY 4
61 uint8_t right_edge; /* mergable on the right edge */
62 uint8_t left_edge; /* mergable on the left edge */
65 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
68 struct sack_track sack_array[256] = {
69 {0, 0, 0, 0, /* 0x00 */
76 {1, 0, 1, 0, /* 0x01 */
83 {0, 0, 1, 0, /* 0x02 */
90 {1, 0, 1, 0, /* 0x03 */
97 {0, 0, 1, 0, /* 0x04 */
104 {1, 0, 2, 0, /* 0x05 */
111 {0, 0, 1, 0, /* 0x06 */
118 {1, 0, 1, 0, /* 0x07 */
125 {0, 0, 1, 0, /* 0x08 */
132 {1, 0, 2, 0, /* 0x09 */
139 {0, 0, 2, 0, /* 0x0a */
146 {1, 0, 2, 0, /* 0x0b */
153 {0, 0, 1, 0, /* 0x0c */
160 {1, 0, 2, 0, /* 0x0d */
167 {0, 0, 1, 0, /* 0x0e */
174 {1, 0, 1, 0, /* 0x0f */
181 {0, 0, 1, 0, /* 0x10 */
188 {1, 0, 2, 0, /* 0x11 */
195 {0, 0, 2, 0, /* 0x12 */
202 {1, 0, 2, 0, /* 0x13 */
209 {0, 0, 2, 0, /* 0x14 */
216 {1, 0, 3, 0, /* 0x15 */
223 {0, 0, 2, 0, /* 0x16 */
230 {1, 0, 2, 0, /* 0x17 */
237 {0, 0, 1, 0, /* 0x18 */
244 {1, 0, 2, 0, /* 0x19 */
251 {0, 0, 2, 0, /* 0x1a */
258 {1, 0, 2, 0, /* 0x1b */
265 {0, 0, 1, 0, /* 0x1c */
272 {1, 0, 2, 0, /* 0x1d */
279 {0, 0, 1, 0, /* 0x1e */
286 {1, 0, 1, 0, /* 0x1f */
293 {0, 0, 1, 0, /* 0x20 */
300 {1, 0, 2, 0, /* 0x21 */
307 {0, 0, 2, 0, /* 0x22 */
314 {1, 0, 2, 0, /* 0x23 */
321 {0, 0, 2, 0, /* 0x24 */
328 {1, 0, 3, 0, /* 0x25 */
335 {0, 0, 2, 0, /* 0x26 */
342 {1, 0, 2, 0, /* 0x27 */
349 {0, 0, 2, 0, /* 0x28 */
356 {1, 0, 3, 0, /* 0x29 */
363 {0, 0, 3, 0, /* 0x2a */
370 {1, 0, 3, 0, /* 0x2b */
377 {0, 0, 2, 0, /* 0x2c */
384 {1, 0, 3, 0, /* 0x2d */
391 {0, 0, 2, 0, /* 0x2e */
398 {1, 0, 2, 0, /* 0x2f */
405 {0, 0, 1, 0, /* 0x30 */
412 {1, 0, 2, 0, /* 0x31 */
419 {0, 0, 2, 0, /* 0x32 */
426 {1, 0, 2, 0, /* 0x33 */
433 {0, 0, 2, 0, /* 0x34 */
440 {1, 0, 3, 0, /* 0x35 */
447 {0, 0, 2, 0, /* 0x36 */
454 {1, 0, 2, 0, /* 0x37 */
461 {0, 0, 1, 0, /* 0x38 */
468 {1, 0, 2, 0, /* 0x39 */
475 {0, 0, 2, 0, /* 0x3a */
482 {1, 0, 2, 0, /* 0x3b */
489 {0, 0, 1, 0, /* 0x3c */
496 {1, 0, 2, 0, /* 0x3d */
503 {0, 0, 1, 0, /* 0x3e */
510 {1, 0, 1, 0, /* 0x3f */
517 {0, 0, 1, 0, /* 0x40 */
524 {1, 0, 2, 0, /* 0x41 */
531 {0, 0, 2, 0, /* 0x42 */
538 {1, 0, 2, 0, /* 0x43 */
545 {0, 0, 2, 0, /* 0x44 */
552 {1, 0, 3, 0, /* 0x45 */
559 {0, 0, 2, 0, /* 0x46 */
566 {1, 0, 2, 0, /* 0x47 */
573 {0, 0, 2, 0, /* 0x48 */
580 {1, 0, 3, 0, /* 0x49 */
587 {0, 0, 3, 0, /* 0x4a */
594 {1, 0, 3, 0, /* 0x4b */
601 {0, 0, 2, 0, /* 0x4c */
608 {1, 0, 3, 0, /* 0x4d */
615 {0, 0, 2, 0, /* 0x4e */
622 {1, 0, 2, 0, /* 0x4f */
629 {0, 0, 2, 0, /* 0x50 */
636 {1, 0, 3, 0, /* 0x51 */
643 {0, 0, 3, 0, /* 0x52 */
650 {1, 0, 3, 0, /* 0x53 */
657 {0, 0, 3, 0, /* 0x54 */
664 {1, 0, 4, 0, /* 0x55 */
671 {0, 0, 3, 0, /* 0x56 */
678 {1, 0, 3, 0, /* 0x57 */
685 {0, 0, 2, 0, /* 0x58 */
692 {1, 0, 3, 0, /* 0x59 */
699 {0, 0, 3, 0, /* 0x5a */
706 {1, 0, 3, 0, /* 0x5b */
713 {0, 0, 2, 0, /* 0x5c */
720 {1, 0, 3, 0, /* 0x5d */
727 {0, 0, 2, 0, /* 0x5e */
734 {1, 0, 2, 0, /* 0x5f */
741 {0, 0, 1, 0, /* 0x60 */
748 {1, 0, 2, 0, /* 0x61 */
755 {0, 0, 2, 0, /* 0x62 */
762 {1, 0, 2, 0, /* 0x63 */
769 {0, 0, 2, 0, /* 0x64 */
776 {1, 0, 3, 0, /* 0x65 */
783 {0, 0, 2, 0, /* 0x66 */
790 {1, 0, 2, 0, /* 0x67 */
797 {0, 0, 2, 0, /* 0x68 */
804 {1, 0, 3, 0, /* 0x69 */
811 {0, 0, 3, 0, /* 0x6a */
818 {1, 0, 3, 0, /* 0x6b */
825 {0, 0, 2, 0, /* 0x6c */
832 {1, 0, 3, 0, /* 0x6d */
839 {0, 0, 2, 0, /* 0x6e */
846 {1, 0, 2, 0, /* 0x6f */
853 {0, 0, 1, 0, /* 0x70 */
860 {1, 0, 2, 0, /* 0x71 */
867 {0, 0, 2, 0, /* 0x72 */
874 {1, 0, 2, 0, /* 0x73 */
881 {0, 0, 2, 0, /* 0x74 */
888 {1, 0, 3, 0, /* 0x75 */
895 {0, 0, 2, 0, /* 0x76 */
902 {1, 0, 2, 0, /* 0x77 */
909 {0, 0, 1, 0, /* 0x78 */
916 {1, 0, 2, 0, /* 0x79 */
923 {0, 0, 2, 0, /* 0x7a */
930 {1, 0, 2, 0, /* 0x7b */
937 {0, 0, 1, 0, /* 0x7c */
944 {1, 0, 2, 0, /* 0x7d */
951 {0, 0, 1, 0, /* 0x7e */
958 {1, 0, 1, 0, /* 0x7f */
965 {0, 1, 1, 0, /* 0x80 */
972 {1, 1, 2, 0, /* 0x81 */
979 {0, 1, 2, 0, /* 0x82 */
986 {1, 1, 2, 0, /* 0x83 */
993 {0, 1, 2, 0, /* 0x84 */
1000 {1, 1, 3, 0, /* 0x85 */
1007 {0, 1, 2, 0, /* 0x86 */
1014 {1, 1, 2, 0, /* 0x87 */
1021 {0, 1, 2, 0, /* 0x88 */
1028 {1, 1, 3, 0, /* 0x89 */
1035 {0, 1, 3, 0, /* 0x8a */
1042 {1, 1, 3, 0, /* 0x8b */
1049 {0, 1, 2, 0, /* 0x8c */
1056 {1, 1, 3, 0, /* 0x8d */
1063 {0, 1, 2, 0, /* 0x8e */
1070 {1, 1, 2, 0, /* 0x8f */
1077 {0, 1, 2, 0, /* 0x90 */
1084 {1, 1, 3, 0, /* 0x91 */
1091 {0, 1, 3, 0, /* 0x92 */
1098 {1, 1, 3, 0, /* 0x93 */
1105 {0, 1, 3, 0, /* 0x94 */
1112 {1, 1, 4, 0, /* 0x95 */
1119 {0, 1, 3, 0, /* 0x96 */
1126 {1, 1, 3, 0, /* 0x97 */
1133 {0, 1, 2, 0, /* 0x98 */
1140 {1, 1, 3, 0, /* 0x99 */
1147 {0, 1, 3, 0, /* 0x9a */
1154 {1, 1, 3, 0, /* 0x9b */
1161 {0, 1, 2, 0, /* 0x9c */
1168 {1, 1, 3, 0, /* 0x9d */
1175 {0, 1, 2, 0, /* 0x9e */
1182 {1, 1, 2, 0, /* 0x9f */
1189 {0, 1, 2, 0, /* 0xa0 */
1196 {1, 1, 3, 0, /* 0xa1 */
1203 {0, 1, 3, 0, /* 0xa2 */
1210 {1, 1, 3, 0, /* 0xa3 */
1217 {0, 1, 3, 0, /* 0xa4 */
1224 {1, 1, 4, 0, /* 0xa5 */
1231 {0, 1, 3, 0, /* 0xa6 */
1238 {1, 1, 3, 0, /* 0xa7 */
1245 {0, 1, 3, 0, /* 0xa8 */
1252 {1, 1, 4, 0, /* 0xa9 */
1259 {0, 1, 4, 0, /* 0xaa */
1266 {1, 1, 4, 0, /* 0xab */
1273 {0, 1, 3, 0, /* 0xac */
1280 {1, 1, 4, 0, /* 0xad */
1287 {0, 1, 3, 0, /* 0xae */
1294 {1, 1, 3, 0, /* 0xaf */
1301 {0, 1, 2, 0, /* 0xb0 */
1308 {1, 1, 3, 0, /* 0xb1 */
1315 {0, 1, 3, 0, /* 0xb2 */
1322 {1, 1, 3, 0, /* 0xb3 */
1329 {0, 1, 3, 0, /* 0xb4 */
1336 {1, 1, 4, 0, /* 0xb5 */
1343 {0, 1, 3, 0, /* 0xb6 */
1350 {1, 1, 3, 0, /* 0xb7 */
1357 {0, 1, 2, 0, /* 0xb8 */
1364 {1, 1, 3, 0, /* 0xb9 */
1371 {0, 1, 3, 0, /* 0xba */
1378 {1, 1, 3, 0, /* 0xbb */
1385 {0, 1, 2, 0, /* 0xbc */
1392 {1, 1, 3, 0, /* 0xbd */
1399 {0, 1, 2, 0, /* 0xbe */
1406 {1, 1, 2, 0, /* 0xbf */
1413 {0, 1, 1, 0, /* 0xc0 */
1420 {1, 1, 2, 0, /* 0xc1 */
1427 {0, 1, 2, 0, /* 0xc2 */
1434 {1, 1, 2, 0, /* 0xc3 */
1441 {0, 1, 2, 0, /* 0xc4 */
1448 {1, 1, 3, 0, /* 0xc5 */
1455 {0, 1, 2, 0, /* 0xc6 */
1462 {1, 1, 2, 0, /* 0xc7 */
1469 {0, 1, 2, 0, /* 0xc8 */
1476 {1, 1, 3, 0, /* 0xc9 */
1483 {0, 1, 3, 0, /* 0xca */
1490 {1, 1, 3, 0, /* 0xcb */
1497 {0, 1, 2, 0, /* 0xcc */
1504 {1, 1, 3, 0, /* 0xcd */
1511 {0, 1, 2, 0, /* 0xce */
1518 {1, 1, 2, 0, /* 0xcf */
1525 {0, 1, 2, 0, /* 0xd0 */
1532 {1, 1, 3, 0, /* 0xd1 */
1539 {0, 1, 3, 0, /* 0xd2 */
1546 {1, 1, 3, 0, /* 0xd3 */
1553 {0, 1, 3, 0, /* 0xd4 */
1560 {1, 1, 4, 0, /* 0xd5 */
1567 {0, 1, 3, 0, /* 0xd6 */
1574 {1, 1, 3, 0, /* 0xd7 */
1581 {0, 1, 2, 0, /* 0xd8 */
1588 {1, 1, 3, 0, /* 0xd9 */
1595 {0, 1, 3, 0, /* 0xda */
1602 {1, 1, 3, 0, /* 0xdb */
1609 {0, 1, 2, 0, /* 0xdc */
1616 {1, 1, 3, 0, /* 0xdd */
1623 {0, 1, 2, 0, /* 0xde */
1630 {1, 1, 2, 0, /* 0xdf */
1637 {0, 1, 1, 0, /* 0xe0 */
1644 {1, 1, 2, 0, /* 0xe1 */
1651 {0, 1, 2, 0, /* 0xe2 */
1658 {1, 1, 2, 0, /* 0xe3 */
1665 {0, 1, 2, 0, /* 0xe4 */
1672 {1, 1, 3, 0, /* 0xe5 */
1679 {0, 1, 2, 0, /* 0xe6 */
1686 {1, 1, 2, 0, /* 0xe7 */
1693 {0, 1, 2, 0, /* 0xe8 */
1700 {1, 1, 3, 0, /* 0xe9 */
1707 {0, 1, 3, 0, /* 0xea */
1714 {1, 1, 3, 0, /* 0xeb */
1721 {0, 1, 2, 0, /* 0xec */
1728 {1, 1, 3, 0, /* 0xed */
1735 {0, 1, 2, 0, /* 0xee */
1742 {1, 1, 2, 0, /* 0xef */
1749 {0, 1, 1, 0, /* 0xf0 */
1756 {1, 1, 2, 0, /* 0xf1 */
1763 {0, 1, 2, 0, /* 0xf2 */
1770 {1, 1, 2, 0, /* 0xf3 */
1777 {0, 1, 2, 0, /* 0xf4 */
1784 {1, 1, 3, 0, /* 0xf5 */
1791 {0, 1, 2, 0, /* 0xf6 */
1798 {1, 1, 2, 0, /* 0xf7 */
1805 {0, 1, 1, 0, /* 0xf8 */
1812 {1, 1, 2, 0, /* 0xf9 */
1819 {0, 1, 2, 0, /* 0xfa */
1826 {1, 1, 2, 0, /* 0xfb */
1833 {0, 1, 1, 0, /* 0xfc */
1840 {1, 1, 2, 0, /* 0xfd */
1847 {0, 1, 1, 0, /* 0xfe */
1854 {1, 1, 1, 0, /* 0xff */
1865 sctp_is_address_in_scope(struct sctp_ifa *ifa,
1866 struct sctp_scoping *scope,
1869 if ((scope->loopback_scope == 0) &&
1870 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1872 * skip loopback if not in scope *
1876 switch (ifa->address.sa.sa_family) {
1879 if (scope->ipv4_addr_legal) {
1880 struct sockaddr_in *sin;
1882 sin = (struct sockaddr_in *)&ifa->address.sin;
1883 if (sin->sin_addr.s_addr == 0) {
1884 /* not in scope , unspecified */
1887 if ((scope->ipv4_local_scope == 0) &&
1888 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1889 /* private address not in scope */
1899 if (scope->ipv6_addr_legal) {
1900 struct sockaddr_in6 *sin6;
1903 * Must update the flags, bummer, which means any
1904 * IFA locks must now be applied HERE <->
1907 sctp_gather_internal_ifa_flags(ifa);
1909 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1912 /* ok to use deprecated addresses? */
1913 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
1914 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1915 /* skip unspecifed addresses */
1918 if ( /* (local_scope == 0) && */
1919 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1922 if ((scope->site_scope == 0) &&
1923 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1937 static struct mbuf *
1938 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t * len)
1940 #if defined(INET) || defined(INET6)
1941 struct sctp_paramhdr *parmh;
1947 switch (ifa->address.sa.sa_family) {
1950 plen = (uint16_t) sizeof(struct sctp_ipv4addr_param);
1955 plen = (uint16_t) sizeof(struct sctp_ipv6addr_param);
1961 #if defined(INET) || defined(INET6)
1962 if (M_TRAILINGSPACE(m) >= plen) {
1963 /* easy side we just drop it on the end */
1964 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1967 /* Need more space */
1969 while (SCTP_BUF_NEXT(mret) != NULL) {
1970 mret = SCTP_BUF_NEXT(mret);
1972 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_DONTWAIT, 1, MT_DATA);
1973 if (SCTP_BUF_NEXT(mret) == NULL) {
1974 /* We are hosed, can't add more addresses */
1977 mret = SCTP_BUF_NEXT(mret);
1978 parmh = mtod(mret, struct sctp_paramhdr *);
1980 /* now add the parameter */
1981 switch (ifa->address.sa.sa_family) {
1985 struct sctp_ipv4addr_param *ipv4p;
1986 struct sockaddr_in *sin;
1988 sin = (struct sockaddr_in *)&ifa->address.sin;
1989 ipv4p = (struct sctp_ipv4addr_param *)parmh;
1990 parmh->param_type = htons(SCTP_IPV4_ADDRESS);
1991 parmh->param_length = htons(plen);
1992 ipv4p->addr = sin->sin_addr.s_addr;
1993 SCTP_BUF_LEN(mret) += plen;
2000 struct sctp_ipv6addr_param *ipv6p;
2001 struct sockaddr_in6 *sin6;
2003 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2004 ipv6p = (struct sctp_ipv6addr_param *)parmh;
2005 parmh->param_type = htons(SCTP_IPV6_ADDRESS);
2006 parmh->param_length = htons(plen);
2007 memcpy(ipv6p->addr, &sin6->sin6_addr,
2008 sizeof(ipv6p->addr));
2009 /* clear embedded scope in the address */
2010 in6_clearscope((struct in6_addr *)ipv6p->addr);
2011 SCTP_BUF_LEN(mret) += plen;
2027 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2028 struct sctp_scoping *scope,
2029 struct mbuf *m_at, int cnt_inits_to,
2030 uint16_t * padding_len, uint16_t * chunk_len)
2032 struct sctp_vrf *vrf = NULL;
2033 int cnt, limit_out = 0, total_count;
2036 vrf_id = inp->def_vrf_id;
2037 SCTP_IPI_ADDR_RLOCK();
2038 vrf = sctp_find_vrf(vrf_id);
2040 SCTP_IPI_ADDR_RUNLOCK();
2043 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2044 struct sctp_ifa *sctp_ifap;
2045 struct sctp_ifn *sctp_ifnp;
2048 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2050 cnt = SCTP_ADDRESS_LIMIT;
2053 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2054 if ((scope->loopback_scope == 0) &&
2055 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2057 * Skip loopback devices if loopback_scope
2062 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2063 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2066 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
2070 if (cnt > SCTP_ADDRESS_LIMIT) {
2074 if (cnt > SCTP_ADDRESS_LIMIT) {
2081 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2083 if ((scope->loopback_scope == 0) &&
2084 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2086 * Skip loopback devices if
2087 * loopback_scope not set
2091 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2092 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2095 if (sctp_is_address_in_scope(sctp_ifap,
2099 if ((chunk_len != NULL) &&
2100 (padding_len != NULL) &&
2101 (*padding_len > 0)) {
2102 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2103 SCTP_BUF_LEN(m_at) += *padding_len;
2104 *chunk_len += *padding_len;
2107 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
2118 if (total_count > SCTP_ADDRESS_LIMIT) {
2119 /* No more addresses */
2127 struct sctp_laddr *laddr;
2130 /* First, how many ? */
2131 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2132 if (laddr->ifa == NULL) {
2135 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2137 * Address being deleted by the system, dont
2141 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2143 * Address being deleted on this ep don't
2148 if (sctp_is_address_in_scope(laddr->ifa,
2155 * To get through a NAT we only list addresses if we have
2156 * more than one. That way if you just bind a single address
2157 * we let the source of the init dictate our address.
2161 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2162 if (laddr->ifa == NULL) {
2165 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2168 if (sctp_is_address_in_scope(laddr->ifa,
2172 if ((chunk_len != NULL) &&
2173 (padding_len != NULL) &&
2174 (*padding_len > 0)) {
2175 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2176 SCTP_BUF_LEN(m_at) += *padding_len;
2177 *chunk_len += *padding_len;
2180 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
2182 if (cnt >= SCTP_ADDRESS_LIMIT) {
2188 SCTP_IPI_ADDR_RUNLOCK();
2192 static struct sctp_ifa *
2193 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2194 uint8_t dest_is_loop,
2195 uint8_t dest_is_priv,
2198 uint8_t dest_is_global = 0;
2200 /* dest_is_priv is true if destination is a private address */
2201 /* dest_is_loop is true if destination is a loopback addresses */
2204 * Here we determine if its a preferred address. A preferred address
2205 * means it is the same scope or higher scope then the destination.
2206 * L = loopback, P = private, G = global
2207 * -----------------------------------------
2208 * src | dest | result
2209 * ----------------------------------------
2211 * -----------------------------------------
2212 * P | L | yes-v4 no-v6
2213 * -----------------------------------------
2214 * G | L | yes-v4 no-v6
2215 * -----------------------------------------
2217 * -----------------------------------------
2219 * -----------------------------------------
2221 * -----------------------------------------
2223 * -----------------------------------------
2225 * -----------------------------------------
2227 * -----------------------------------------
2230 if (ifa->address.sa.sa_family != fam) {
2231 /* forget mis-matched family */
2234 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2237 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2238 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2239 /* Ok the address may be ok */
2241 if (fam == AF_INET6) {
2242 /* ok to use deprecated addresses? no lets not! */
2243 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2244 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2247 if (ifa->src_is_priv && !ifa->src_is_loop) {
2249 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2253 if (ifa->src_is_glob) {
2255 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2262 * Now that we know what is what, implement or table this could in
2263 * theory be done slicker (it used to be), but this is
2264 * straightforward and easier to validate :-)
2266 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2267 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2268 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2269 dest_is_loop, dest_is_priv, dest_is_global);
2271 if ((ifa->src_is_loop) && (dest_is_priv)) {
2272 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2275 if ((ifa->src_is_glob) && (dest_is_priv)) {
2276 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2279 if ((ifa->src_is_loop) && (dest_is_global)) {
2280 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2283 if ((ifa->src_is_priv) && (dest_is_global)) {
2284 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2287 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2288 /* its a preferred address */
2292 static struct sctp_ifa *
2293 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2294 uint8_t dest_is_loop,
2295 uint8_t dest_is_priv,
2298 uint8_t dest_is_global = 0;
2301 * Here we determine if its a acceptable address. A acceptable
2302 * address means it is the same scope or higher scope but we can
2303 * allow for NAT which means its ok to have a global dest and a
2306 * L = loopback, P = private, G = global
2307 * -----------------------------------------
2308 * src | dest | result
2309 * -----------------------------------------
2311 * -----------------------------------------
2312 * P | L | yes-v4 no-v6
2313 * -----------------------------------------
2315 * -----------------------------------------
2317 * -----------------------------------------
2319 * -----------------------------------------
2320 * G | P | yes - May not work
2321 * -----------------------------------------
2323 * -----------------------------------------
2324 * P | G | yes - May not work
2325 * -----------------------------------------
2327 * -----------------------------------------
2330 if (ifa->address.sa.sa_family != fam) {
2331 /* forget non matching family */
2332 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2333 ifa->address.sa.sa_family, fam);
2336 /* Ok the address may be ok */
2337 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2338 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2339 dest_is_loop, dest_is_priv);
2340 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2344 if (fam == AF_INET6) {
2345 /* ok to use deprecated addresses? */
2346 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2349 if (ifa->src_is_priv) {
2350 /* Special case, linklocal to loop */
2357 * Now that we know what is what, implement our table. This could in
2358 * theory be done slicker (it used to be), but this is
2359 * straightforward and easier to validate :-)
2361 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2364 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2367 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2370 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2373 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2374 /* its an acceptable address */
2379 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2381 struct sctp_laddr *laddr;
2384 /* There are no restrictions, no TCB :-) */
2387 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2388 if (laddr->ifa == NULL) {
2389 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2393 if (laddr->ifa == ifa) {
2394 /* Yes it is on the list */
2403 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2405 struct sctp_laddr *laddr;
2409 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2410 if (laddr->ifa == NULL) {
2411 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2415 if ((laddr->ifa == ifa) && laddr->action == 0)
2424 static struct sctp_ifa *
2425 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2428 int non_asoc_addr_ok,
2429 uint8_t dest_is_priv,
2430 uint8_t dest_is_loop,
2433 struct sctp_laddr *laddr, *starting_point;
2436 struct sctp_ifn *sctp_ifn;
2437 struct sctp_ifa *sctp_ifa, *sifa;
2438 struct sctp_vrf *vrf;
2441 vrf = sctp_find_vrf(vrf_id);
2445 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2446 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2447 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2449 * first question, is the ifn we will emit on in our list, if so, we
2450 * want such an address. Note that we first looked for a preferred
2454 /* is a preferred one on the interface we route out? */
2455 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2456 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2457 (non_asoc_addr_ok == 0))
2459 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2464 if (sctp_is_addr_in_ep(inp, sifa)) {
2465 atomic_add_int(&sifa->refcount, 1);
2471 * ok, now we now need to find one on the list of the addresses. We
2472 * can't get one on the emitting interface so let's find first a
2473 * preferred one. If not that an acceptable one otherwise... we
2476 starting_point = inp->next_addr_touse;
2478 if (inp->next_addr_touse == NULL) {
2479 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2482 for (laddr = inp->next_addr_touse; laddr;
2483 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2484 if (laddr->ifa == NULL) {
2485 /* address has been removed */
2488 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2489 /* address is being deleted */
2492 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2496 atomic_add_int(&sifa->refcount, 1);
2499 if (resettotop == 0) {
2500 inp->next_addr_touse = NULL;
2503 inp->next_addr_touse = starting_point;
2506 if (inp->next_addr_touse == NULL) {
2507 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2510 /* ok, what about an acceptable address in the inp */
2511 for (laddr = inp->next_addr_touse; laddr;
2512 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2513 if (laddr->ifa == NULL) {
2514 /* address has been removed */
2517 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2518 /* address is being deleted */
2521 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2525 atomic_add_int(&sifa->refcount, 1);
2528 if (resettotop == 0) {
2529 inp->next_addr_touse = NULL;
2530 goto once_again_too;
2533 * no address bound can be a source for the destination we are in
2541 static struct sctp_ifa *
2542 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2543 struct sctp_tcb *stcb,
2546 uint8_t dest_is_priv,
2547 uint8_t dest_is_loop,
2548 int non_asoc_addr_ok,
2551 struct sctp_laddr *laddr, *starting_point;
2553 struct sctp_ifn *sctp_ifn;
2554 struct sctp_ifa *sctp_ifa, *sifa;
2555 uint8_t start_at_beginning = 0;
2556 struct sctp_vrf *vrf;
2560 * first question, is the ifn we will emit on in our list, if so, we
2563 vrf = sctp_find_vrf(vrf_id);
2567 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2568 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2569 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2572 * first question, is the ifn we will emit on in our list? If so,
2573 * we want that one. First we look for a preferred. Second, we go
2574 * for an acceptable.
2577 /* first try for a preferred address on the ep */
2578 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2579 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2581 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2582 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2585 if (((non_asoc_addr_ok == 0) &&
2586 (sctp_is_addr_restricted(stcb, sifa))) ||
2587 (non_asoc_addr_ok &&
2588 (sctp_is_addr_restricted(stcb, sifa)) &&
2589 (!sctp_is_addr_pending(stcb, sifa)))) {
2590 /* on the no-no list */
2593 atomic_add_int(&sifa->refcount, 1);
2597 /* next try for an acceptable address on the ep */
2598 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2599 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2601 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2602 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2605 if (((non_asoc_addr_ok == 0) &&
2606 (sctp_is_addr_restricted(stcb, sifa))) ||
2607 (non_asoc_addr_ok &&
2608 (sctp_is_addr_restricted(stcb, sifa)) &&
2609 (!sctp_is_addr_pending(stcb, sifa)))) {
2610 /* on the no-no list */
2613 atomic_add_int(&sifa->refcount, 1);
2620 * if we can't find one like that then we must look at all addresses
2621 * bound to pick one at first preferable then secondly acceptable.
2623 starting_point = stcb->asoc.last_used_address;
2625 if (stcb->asoc.last_used_address == NULL) {
2626 start_at_beginning = 1;
2627 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2629 /* search beginning with the last used address */
2630 for (laddr = stcb->asoc.last_used_address; laddr;
2631 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2632 if (laddr->ifa == NULL) {
2633 /* address has been removed */
2636 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2637 /* address is being deleted */
2640 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2643 if (((non_asoc_addr_ok == 0) &&
2644 (sctp_is_addr_restricted(stcb, sifa))) ||
2645 (non_asoc_addr_ok &&
2646 (sctp_is_addr_restricted(stcb, sifa)) &&
2647 (!sctp_is_addr_pending(stcb, sifa)))) {
2648 /* on the no-no list */
2651 stcb->asoc.last_used_address = laddr;
2652 atomic_add_int(&sifa->refcount, 1);
2655 if (start_at_beginning == 0) {
2656 stcb->asoc.last_used_address = NULL;
2657 goto sctp_from_the_top;
2659 /* now try for any higher scope than the destination */
2660 stcb->asoc.last_used_address = starting_point;
2661 start_at_beginning = 0;
2663 if (stcb->asoc.last_used_address == NULL) {
2664 start_at_beginning = 1;
2665 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2667 /* search beginning with the last used address */
2668 for (laddr = stcb->asoc.last_used_address; laddr;
2669 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2670 if (laddr->ifa == NULL) {
2671 /* address has been removed */
2674 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2675 /* address is being deleted */
2678 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2682 if (((non_asoc_addr_ok == 0) &&
2683 (sctp_is_addr_restricted(stcb, sifa))) ||
2684 (non_asoc_addr_ok &&
2685 (sctp_is_addr_restricted(stcb, sifa)) &&
2686 (!sctp_is_addr_pending(stcb, sifa)))) {
2687 /* on the no-no list */
2690 stcb->asoc.last_used_address = laddr;
2691 atomic_add_int(&sifa->refcount, 1);
2694 if (start_at_beginning == 0) {
2695 stcb->asoc.last_used_address = NULL;
2696 goto sctp_from_the_top2;
2701 static struct sctp_ifa *
2702 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2703 struct sctp_tcb *stcb,
2704 int non_asoc_addr_ok,
2705 uint8_t dest_is_loop,
2706 uint8_t dest_is_priv,
2712 struct sctp_ifa *ifa, *sifa;
2713 int num_eligible_addr = 0;
2716 struct sockaddr_in6 sin6, lsa6;
2718 if (fam == AF_INET6) {
2719 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2720 (void)sa6_recoverscope(&sin6);
2723 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2724 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2725 (non_asoc_addr_ok == 0))
2727 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2732 if (fam == AF_INET6 &&
2734 sifa->src_is_loop && sifa->src_is_priv) {
2736 * don't allow fe80::1 to be a src on loop ::1, we
2737 * don't list it to the peer so we will get an
2742 if (fam == AF_INET6 &&
2743 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2744 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2746 * link-local <-> link-local must belong to the same
2749 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2750 (void)sa6_recoverscope(&lsa6);
2751 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2758 * Check if the IPv6 address matches to next-hop. In the
2759 * mobile case, old IPv6 address may be not deleted from the
2760 * interface. Then, the interface has previous and new
2761 * addresses. We should use one corresponding to the
2762 * next-hop. (by micchie)
2765 if (stcb && fam == AF_INET6 &&
2766 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2767 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2774 /* Avoid topologically incorrect IPv4 address */
2775 if (stcb && fam == AF_INET &&
2776 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2777 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2783 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2786 if (((non_asoc_addr_ok == 0) &&
2787 (sctp_is_addr_restricted(stcb, sifa))) ||
2788 (non_asoc_addr_ok &&
2789 (sctp_is_addr_restricted(stcb, sifa)) &&
2790 (!sctp_is_addr_pending(stcb, sifa)))) {
2792 * It is restricted for some reason..
2793 * probably not yet added.
2798 if (num_eligible_addr >= addr_wanted) {
2801 num_eligible_addr++;
2808 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2809 struct sctp_tcb *stcb,
2810 int non_asoc_addr_ok,
2811 uint8_t dest_is_loop,
2812 uint8_t dest_is_priv,
2815 struct sctp_ifa *ifa, *sifa;
2816 int num_eligible_addr = 0;
2818 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2819 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2820 (non_asoc_addr_ok == 0)) {
2823 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2829 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2832 if (((non_asoc_addr_ok == 0) &&
2833 (sctp_is_addr_restricted(stcb, sifa))) ||
2834 (non_asoc_addr_ok &&
2835 (sctp_is_addr_restricted(stcb, sifa)) &&
2836 (!sctp_is_addr_pending(stcb, sifa)))) {
2838 * It is restricted for some reason..
2839 * probably not yet added.
2844 num_eligible_addr++;
2846 return (num_eligible_addr);
2849 static struct sctp_ifa *
2850 sctp_choose_boundall(struct sctp_tcb *stcb,
2851 struct sctp_nets *net,
2854 uint8_t dest_is_priv,
2855 uint8_t dest_is_loop,
2856 int non_asoc_addr_ok,
2859 int cur_addr_num = 0, num_preferred = 0;
2861 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2862 struct sctp_ifa *sctp_ifa, *sifa;
2864 struct sctp_vrf *vrf;
2872 * For boundall we can use any address in the association.
2873 * If non_asoc_addr_ok is set we can use any address (at least in
2874 * theory). So we look for preferred addresses first. If we find one,
2875 * we use it. Otherwise we next try to get an address on the
2876 * interface, which we should be able to do (unless non_asoc_addr_ok
2877 * is false and we are routed out that way). In these cases where we
2878 * can't use the address of the interface we go through all the
2879 * ifn's looking for an address we can use and fill that in. Punting
2880 * means we send back address 0, which will probably cause problems
2881 * actually since then IP will fill in the address of the route ifn,
2882 * which means we probably already rejected it.. i.e. here comes an
2885 vrf = sctp_find_vrf(vrf_id);
2889 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2890 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2891 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2892 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2893 if (sctp_ifn == NULL) {
2894 /* ?? We don't have this guy ?? */
2895 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
2896 goto bound_all_plan_b;
2898 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
2899 ifn_index, sctp_ifn->ifn_name);
2902 cur_addr_num = net->indx_of_eligible_next_to_use;
2904 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
2909 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
2910 num_preferred, sctp_ifn->ifn_name);
2911 if (num_preferred == 0) {
2913 * no eligible addresses, we must use some other interface
2914 * address if we can find one.
2916 goto bound_all_plan_b;
2919 * Ok we have num_eligible_addr set with how many we can use, this
2920 * may vary from call to call due to addresses being deprecated
2923 if (cur_addr_num >= num_preferred) {
2927 * select the nth address from the list (where cur_addr_num is the
2928 * nth) and 0 is the first one, 1 is the second one etc...
2930 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
2932 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
2933 dest_is_priv, cur_addr_num, fam, ro);
2935 /* if sctp_ifa is NULL something changed??, fall to plan b. */
2937 atomic_add_int(&sctp_ifa->refcount, 1);
2939 /* save off where the next one we will want */
2940 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
2945 * plan_b: Look at all interfaces and find a preferred address. If
2946 * no preferred fall through to plan_c.
2949 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
2950 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2951 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
2952 sctp_ifn->ifn_name);
2953 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2954 /* wrong base scope */
2955 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
2958 if ((sctp_ifn == looked_at) && looked_at) {
2959 /* already looked at this guy */
2960 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
2963 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, stcb, non_asoc_addr_ok,
2964 dest_is_loop, dest_is_priv, fam);
2965 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2966 "Found ifn:%p %d preferred source addresses\n",
2967 ifn, num_preferred);
2968 if (num_preferred == 0) {
2969 /* None on this interface. */
2970 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n");
2973 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2974 "num preferred:%d on interface:%p cur_addr_num:%d\n",
2975 num_preferred, (void *)sctp_ifn, cur_addr_num);
2978 * Ok we have num_eligible_addr set with how many we can
2979 * use, this may vary from call to call due to addresses
2980 * being deprecated etc..
2982 if (cur_addr_num >= num_preferred) {
2985 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
2986 dest_is_priv, cur_addr_num, fam, ro);
2990 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
2991 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
2993 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
2994 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
2995 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
2996 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
2998 atomic_add_int(&sifa->refcount, 1);
3002 again_with_private_addresses_allowed:
3004 /* plan_c: do we have an acceptable address on the emit interface */
3006 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3007 if (emit_ifn == NULL) {
3008 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3011 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3012 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3013 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3014 (non_asoc_addr_ok == 0)) {
3015 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3018 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3021 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3025 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3026 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3030 if (((non_asoc_addr_ok == 0) &&
3031 (sctp_is_addr_restricted(stcb, sifa))) ||
3032 (non_asoc_addr_ok &&
3033 (sctp_is_addr_restricted(stcb, sifa)) &&
3034 (!sctp_is_addr_pending(stcb, sifa)))) {
3036 * It is restricted for some reason..
3037 * probably not yet added.
3039 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n");
3044 SCTP_PRINTF("Stcb is null - no print\n");
3046 atomic_add_int(&sifa->refcount, 1);
3051 * plan_d: We are in trouble. No preferred address on the emit
3052 * interface. And not even a preferred address on all interfaces. Go
3053 * out and see if we can find an acceptable address somewhere
3054 * amongst all interfaces.
3056 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3057 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3058 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3059 /* wrong base scope */
3062 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3063 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3064 (non_asoc_addr_ok == 0))
3066 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3072 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3076 if (((non_asoc_addr_ok == 0) &&
3077 (sctp_is_addr_restricted(stcb, sifa))) ||
3078 (non_asoc_addr_ok &&
3079 (sctp_is_addr_restricted(stcb, sifa)) &&
3080 (!sctp_is_addr_pending(stcb, sifa)))) {
3082 * It is restricted for some
3083 * reason.. probably not yet added.
3093 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3094 stcb->asoc.scope.ipv4_local_scope = 1;
3096 goto again_with_private_addresses_allowed;
3097 } else if (retried == 1) {
3098 stcb->asoc.scope.ipv4_local_scope = 0;
3105 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3106 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3107 /* wrong base scope */
3110 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3111 struct sctp_ifa *tmp_sifa;
3113 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3114 (non_asoc_addr_ok == 0))
3116 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3119 if (tmp_sifa == NULL) {
3122 if (tmp_sifa == sifa) {
3126 if (sctp_is_address_in_scope(tmp_sifa,
3127 &stcb->asoc.scope, 0) == 0) {
3130 if (((non_asoc_addr_ok == 0) &&
3131 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3132 (non_asoc_addr_ok &&
3133 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3134 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3144 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3145 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3146 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3151 atomic_add_int(&sifa->refcount, 1);
3159 /* tcb may be NULL */
3161 sctp_source_address_selection(struct sctp_inpcb *inp,
3162 struct sctp_tcb *stcb,
3164 struct sctp_nets *net,
3165 int non_asoc_addr_ok, uint32_t vrf_id)
3167 struct sctp_ifa *answer;
3168 uint8_t dest_is_priv, dest_is_loop;
3172 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3176 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3181 * Rules: - Find the route if needed, cache if I can. - Look at
3182 * interface address in route, Is it in the bound list. If so we
3183 * have the best source. - If not we must rotate amongst the
3188 * Do we need to pay attention to scope. We can have a private address
3189 * or a global address we are sourcing or sending to. So if we draw
3191 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3193 * ------------------------------------------
3194 * source * dest * result
3195 * -----------------------------------------
3196 * <a> Private * Global * NAT
3197 * -----------------------------------------
3198 * <b> Private * Private * No problem
3199 * -----------------------------------------
3200 * <c> Global * Private * Huh, How will this work?
3201 * -----------------------------------------
3202 * <d> Global * Global * No Problem
3203 *------------------------------------------
3204 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3206 *------------------------------------------
3207 * source * dest * result
3208 * -----------------------------------------
3209 * <a> Linklocal * Global *
3210 * -----------------------------------------
3211 * <b> Linklocal * Linklocal * No problem
3212 * -----------------------------------------
3213 * <c> Global * Linklocal * Huh, How will this work?
3214 * -----------------------------------------
3215 * <d> Global * Global * No Problem
3216 *------------------------------------------
3217 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3219 * And then we add to that what happens if there are multiple addresses
3220 * assigned to an interface. Remember the ifa on a ifn is a linked
3221 * list of addresses. So one interface can have more than one IP
3222 * address. What happens if we have both a private and a global
3223 * address? Do we then use context of destination to sort out which
3224 * one is best? And what about NAT's sending P->G may get you a NAT
3225 * translation, or should you select the G thats on the interface in
3230 * - count the number of addresses on the interface.
3231 * - if it is one, no problem except case <c>.
3232 * For <a> we will assume a NAT out there.
3233 * - if there are more than one, then we need to worry about scope P
3234 * or G. We should prefer G -> G and P -> P if possible.
3235 * Then as a secondary fall back to mixed types G->P being a last
3237 * - The above all works for bound all, but bound specific we need to
3238 * use the same concept but instead only consider the bound
3239 * addresses. If the bound set is NOT assigned to the interface then
3240 * we must use rotation amongst the bound addresses..
3242 if (ro->ro_rt == NULL) {
3244 * Need a route to cache.
3246 SCTP_RTALLOC(ro, vrf_id);
3248 if (ro->ro_rt == NULL) {
3251 fam = ro->ro_dst.sa_family;
3252 dest_is_priv = dest_is_loop = 0;
3253 /* Setup our scopes for the destination */
3257 /* Scope based on outbound address */
3258 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3261 /* mark it as local */
3262 net->addr_is_local = 1;
3264 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3271 /* Scope based on outbound address */
3272 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3273 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3275 * If the address is a loopback address, which
3276 * consists of "::1" OR "fe80::1%lo0", we are
3277 * loopback scope. But we don't use dest_is_priv
3278 * (link local addresses).
3282 /* mark it as local */
3283 net->addr_is_local = 1;
3285 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3291 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3292 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3293 SCTP_IPI_ADDR_RLOCK();
3294 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3298 answer = sctp_choose_boundall(stcb, net, ro, vrf_id,
3299 dest_is_priv, dest_is_loop,
3300 non_asoc_addr_ok, fam);
3301 SCTP_IPI_ADDR_RUNLOCK();
3308 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3309 vrf_id, dest_is_priv,
3311 non_asoc_addr_ok, fam);
3313 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3318 SCTP_IPI_ADDR_RUNLOCK();
3323 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3326 int tlen, at, found;
3327 struct sctp_sndinfo sndinfo;
3328 struct sctp_prinfo prinfo;
3329 struct sctp_authinfo authinfo;
3331 tlen = SCTP_BUF_LEN(control);
3335 * Independent of how many mbufs, find the c_type inside the control
3336 * structure and copy out the data.
3339 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3340 /* There is not enough room for one more. */
3343 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3344 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3345 /* We dont't have a complete CMSG header. */
3348 if (((int)cmh.cmsg_len + at) > tlen) {
3349 /* We don't have the complete CMSG. */
3352 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3353 ((c_type == cmh.cmsg_type) ||
3354 ((c_type == SCTP_SNDRCV) &&
3355 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3356 (cmh.cmsg_type == SCTP_PRINFO) ||
3357 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3358 if (c_type == cmh.cmsg_type) {
3359 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
3362 /* It is exactly what we want. Copy it out. */
3363 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), cpsize, (caddr_t)data);
3366 struct sctp_sndrcvinfo *sndrcvinfo;
3368 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3370 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3373 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3375 switch (cmh.cmsg_type) {
3377 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
3380 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3381 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3382 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3383 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3384 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3385 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3388 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
3391 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3392 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_DONTWAIT, 1, MT_DATA);
3680 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_DONTWAIT);
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_DONTWAIT, 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_DONTWAIT, 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)) {
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 = 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_DONTWAIT, 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_DONTWAIT, 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_DONTWAIT, 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_DONTWAIT, 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_DONTWAIT, 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 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, NULL,
5396 use_mflowid, mflowid,
5401 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5402 (offset + sizeof(struct sctp_init_chunk)),
5403 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5406 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5407 init_chk->init.initiate_tag, op_err,
5408 use_mflowid, mflowid,
5412 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
5414 /* No memory, INIT timer will re-attempt. */
5416 sctp_m_freem(op_err);
5419 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
5422 * We might not overwrite the identification[] completely and on
5423 * some platforms time_entered will contain some padding. Therefore
5424 * zero out the cookie to avoid putting uninitialized memory on the
5427 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5429 /* the time I built cookie */
5430 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5432 /* populate any tie tags */
5434 /* unlock before tag selections */
5435 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5436 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5437 stc.cookie_life = asoc->cookie_life;
5438 net = asoc->primary_destination;
5440 stc.tie_tag_my_vtag = 0;
5441 stc.tie_tag_peer_vtag = 0;
5442 /* life I will award this cookie */
5443 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5446 /* copy in the ports for later check */
5447 stc.myport = sh->dest_port;
5448 stc.peerport = sh->src_port;
5451 * If we wanted to honor cookie life extentions, we would add to
5452 * stc.cookie_life. For now we should NOT honor any extension
5454 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5455 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5456 stc.ipv6_addr_legal = 1;
5457 if (SCTP_IPV6_V6ONLY(inp)) {
5458 stc.ipv4_addr_legal = 0;
5460 stc.ipv4_addr_legal = 1;
5463 stc.ipv6_addr_legal = 0;
5464 stc.ipv4_addr_legal = 1;
5466 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5473 switch (dst->sa_family) {
5477 /* lookup address */
5478 stc.address[0] = src4->sin_addr.s_addr;
5482 stc.addr_type = SCTP_IPV4_ADDRESS;
5483 /* local from address */
5484 stc.laddress[0] = dst4->sin_addr.s_addr;
5485 stc.laddress[1] = 0;
5486 stc.laddress[2] = 0;
5487 stc.laddress[3] = 0;
5488 stc.laddr_type = SCTP_IPV4_ADDRESS;
5489 /* scope_id is only for v6 */
5491 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5492 if (IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) {
5497 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5498 /* Must use the address in this case */
5499 if (sctp_is_address_on_local_host(src, vrf_id)) {
5500 stc.loopback_scope = 1;
5503 stc.local_scope = 0;
5511 stc.addr_type = SCTP_IPV6_ADDRESS;
5512 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5513 stc.scope_id = in6_getscope(&src6->sin6_addr);
5514 if (sctp_is_address_on_local_host(src, vrf_id)) {
5515 stc.loopback_scope = 1;
5516 stc.local_scope = 0;
5519 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr)) {
5521 * If the new destination is a
5522 * LINK_LOCAL we must have common
5523 * both site and local scope. Don't
5524 * set local scope though since we
5525 * must depend on the source to be
5526 * added implicitly. We cannot
5527 * assure just because we share one
5528 * link that all links are common.
5530 stc.local_scope = 0;
5534 * we start counting for the private
5535 * address stuff at 1. since the
5536 * link local we source from won't
5537 * show up in our scoped count.
5541 * pull out the scope_id from
5544 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr)) {
5546 * If the new destination is
5547 * SITE_LOCAL then we must have site
5552 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5553 stc.laddr_type = SCTP_IPV6_ADDRESS;
5563 /* set the scope per the existing tcb */
5566 struct sctp_nets *lnet;
5570 stc.loopback_scope = asoc->scope.loopback_scope;
5571 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5572 stc.site_scope = asoc->scope.site_scope;
5573 stc.local_scope = asoc->scope.local_scope;
5575 /* Why do we not consider IPv4 LL addresses? */
5576 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5577 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5578 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5580 * if we have a LL address, start
5588 /* use the net pointer */
5589 to = (struct sockaddr *)&net->ro._l_addr;
5590 switch (to->sa_family) {
5593 sin = (struct sockaddr_in *)to;
5594 stc.address[0] = sin->sin_addr.s_addr;
5598 stc.addr_type = SCTP_IPV4_ADDRESS;
5599 if (net->src_addr_selected == 0) {
5601 * strange case here, the INIT should have
5602 * did the selection.
5604 net->ro._s_addr = sctp_source_address_selection(inp,
5605 stcb, (sctp_route_t *) & net->ro,
5607 if (net->ro._s_addr == NULL)
5610 net->src_addr_selected = 1;
5613 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5614 stc.laddress[1] = 0;
5615 stc.laddress[2] = 0;
5616 stc.laddress[3] = 0;
5617 stc.laddr_type = SCTP_IPV4_ADDRESS;
5618 /* scope_id is only for v6 */
5624 sin6 = (struct sockaddr_in6 *)to;
5625 memcpy(&stc.address, &sin6->sin6_addr,
5626 sizeof(struct in6_addr));
5627 stc.addr_type = SCTP_IPV6_ADDRESS;
5628 stc.scope_id = sin6->sin6_scope_id;
5629 if (net->src_addr_selected == 0) {
5631 * strange case here, the INIT should have
5632 * done the selection.
5634 net->ro._s_addr = sctp_source_address_selection(inp,
5635 stcb, (sctp_route_t *) & net->ro,
5637 if (net->ro._s_addr == NULL)
5640 net->src_addr_selected = 1;
5642 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5643 sizeof(struct in6_addr));
5644 stc.laddr_type = SCTP_IPV6_ADDRESS;
5649 /* Now lets put the SCTP header in place */
5650 initack = mtod(m, struct sctp_init_ack_chunk *);
5651 /* Save it off for quick ref */
5652 stc.peers_vtag = init_chk->init.initiate_tag;
5654 memcpy(stc.identification, SCTP_VERSION_STRING,
5655 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5656 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5657 /* now the chunk header */
5658 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5659 initack->ch.chunk_flags = 0;
5660 /* fill in later from mbuf we build */
5661 initack->ch.chunk_length = 0;
5662 /* place in my tag */
5663 if ((asoc != NULL) &&
5664 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5665 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5666 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5667 /* re-use the v-tags and init-seq here */
5668 initack->init.initiate_tag = htonl(asoc->my_vtag);
5669 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5671 uint32_t vtag, itsn;
5673 if (hold_inp_lock) {
5674 SCTP_INP_INCR_REF(inp);
5675 SCTP_INP_RUNLOCK(inp);
5678 atomic_add_int(&asoc->refcnt, 1);
5679 SCTP_TCB_UNLOCK(stcb);
5681 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5682 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5684 * Got a duplicate vtag on some guy behind a
5685 * nat make sure we don't use it.
5689 initack->init.initiate_tag = htonl(vtag);
5690 /* get a TSN to use too */
5691 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5692 initack->init.initial_tsn = htonl(itsn);
5693 SCTP_TCB_LOCK(stcb);
5694 atomic_add_int(&asoc->refcnt, -1);
5696 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5697 initack->init.initiate_tag = htonl(vtag);
5698 /* get a TSN to use too */
5699 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5701 if (hold_inp_lock) {
5702 SCTP_INP_RLOCK(inp);
5703 SCTP_INP_DECR_REF(inp);
5706 /* save away my tag to */
5707 stc.my_vtag = initack->init.initiate_tag;
5709 /* set up some of the credits. */
5710 so = inp->sctp_socket;
5712 /* memory problem */
5716 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5718 /* set what I want */
5719 his_limit = ntohs(init_chk->init.num_inbound_streams);
5720 /* choose what I want */
5722 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5723 i_want = asoc->streamoutcnt;
5725 i_want = inp->sctp_ep.pre_open_stream_count;
5728 i_want = inp->sctp_ep.pre_open_stream_count;
5730 if (his_limit < i_want) {
5731 /* I Want more :< */
5732 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5734 /* I can have what I want :> */
5735 initack->init.num_outbound_streams = htons(i_want);
5737 /* tell him his limit. */
5738 initack->init.num_inbound_streams =
5739 htons(inp->sctp_ep.max_open_streams_intome);
5741 /* adaptation layer indication parameter */
5742 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5743 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack));
5744 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5745 ali->ph.param_length = htons(sizeof(*ali));
5746 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
5747 SCTP_BUF_LEN(m) += sizeof(*ali);
5748 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
5750 ecn = (struct sctp_ecn_supported_param *)((caddr_t)initack + sizeof(*initack));
5754 if (((asoc != NULL) && (asoc->ecn_allowed == 1)) ||
5755 (inp->sctp_ecn_enable == 1)) {
5756 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
5757 ecn->ph.param_length = htons(sizeof(*ecn));
5758 SCTP_BUF_LEN(m) += sizeof(*ecn);
5760 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
5763 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
5765 /* And now tell the peer we do pr-sctp */
5766 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
5767 prsctp->ph.param_length = htons(sizeof(*prsctp));
5768 SCTP_BUF_LEN(m) += sizeof(*prsctp);
5770 /* Add NAT friendly parameter */
5771 struct sctp_paramhdr *ph;
5773 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5774 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5775 ph->param_length = htons(sizeof(struct sctp_paramhdr));
5776 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
5778 /* And now tell the peer we do all the extensions */
5779 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5780 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5782 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5783 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5784 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5785 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5786 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5787 if (!SCTP_BASE_SYSCTL(sctp_auth_disable))
5788 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5789 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
5790 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5791 p_len = sizeof(*pr_supported) + num_ext;
5792 pr_supported->ph.param_length = htons(p_len);
5793 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
5794 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5796 /* add authentication parameters */
5797 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
5798 struct sctp_auth_random *randp;
5799 struct sctp_auth_hmac_algo *hmacs;
5800 struct sctp_auth_chunk_list *chunks;
5801 uint16_t random_len;
5803 /* generate and add RANDOM parameter */
5804 random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5805 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5806 randp->ph.param_type = htons(SCTP_RANDOM);
5807 p_len = sizeof(*randp) + random_len;
5808 randp->ph.param_length = htons(p_len);
5809 SCTP_READ_RANDOM(randp->random_data, random_len);
5810 /* zero out any padding required */
5811 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
5812 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5814 /* add HMAC_ALGO parameter */
5815 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5816 p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5817 (uint8_t *) hmacs->hmac_ids);
5819 p_len += sizeof(*hmacs);
5820 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5821 hmacs->ph.param_length = htons(p_len);
5822 /* zero out any padding required */
5823 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
5824 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5826 /* add CHUNKS parameter */
5827 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5828 p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5829 chunks->chunk_types);
5831 p_len += sizeof(*chunks);
5832 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5833 chunks->ph.param_length = htons(p_len);
5834 /* zero out any padding required */
5835 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
5836 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5840 /* now the addresses */
5842 struct sctp_scoping scp;
5845 * To optimize this we could put the scoping stuff into a
5846 * structure and remove the individual uint8's from the stc
5847 * structure. Then we could just sifa in the address within
5848 * the stc.. but for now this is a quick hack to get the
5849 * address stuff teased apart.
5851 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5852 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5853 scp.loopback_scope = stc.loopback_scope;
5854 scp.ipv4_local_scope = stc.ipv4_scope;
5855 scp.local_scope = stc.local_scope;
5856 scp.site_scope = stc.site_scope;
5857 m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to, NULL, NULL);
5860 /* tack on the operational error if present */
5869 llen += SCTP_BUF_LEN(ol);
5870 ol = SCTP_BUF_NEXT(ol);
5873 /* must add a pad to the param */
5874 uint32_t cpthis = 0;
5877 padlen = 4 - (llen % 4);
5878 m_copyback(op_err, llen, padlen, (caddr_t)&cpthis);
5880 while (SCTP_BUF_NEXT(m_at) != NULL) {
5881 m_at = SCTP_BUF_NEXT(m_at);
5883 SCTP_BUF_NEXT(m_at) = op_err;
5884 while (SCTP_BUF_NEXT(m_at) != NULL) {
5885 m_at = SCTP_BUF_NEXT(m_at);
5888 /* pre-calulate the size and update pkt header and chunk header */
5890 for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5891 p_len += SCTP_BUF_LEN(m_tmp);
5892 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5893 /* m_tmp should now point to last one */
5898 /* Now we must build a cookie */
5899 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
5900 if (m_cookie == NULL) {
5901 /* memory problem */
5905 /* Now append the cookie to the end and update the space/size */
5906 SCTP_BUF_NEXT(m_tmp) = m_cookie;
5908 for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5909 p_len += SCTP_BUF_LEN(m_tmp);
5910 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5911 /* m_tmp should now point to last one */
5917 * Place in the size, but we don't include the last pad (if any) in
5920 initack->ch.chunk_length = htons(p_len);
5923 * Time to sign the cookie, we don't sign over the cookie signature
5924 * though thus we set trailer.
5926 (void)sctp_hmac_m(SCTP_HMAC,
5927 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
5928 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
5929 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
5931 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
5932 * here since the timer will drive a retranmission.
5935 if ((padval) && (mp_last)) {
5936 /* see my previous comments on mp_last */
5937 if (sctp_add_pad_tombuf(mp_last, (4 - padval))) {
5938 /* Houston we have a problem, no space */
5943 if (stc.loopback_scope) {
5944 over_addr = (union sctp_sockstore *)dst;
5949 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
5951 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
5953 use_mflowid, mflowid,
5954 SCTP_SO_NOT_LOCKED);
5955 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
5960 sctp_prune_prsctp(struct sctp_tcb *stcb,
5961 struct sctp_association *asoc,
5962 struct sctp_sndrcvinfo *srcv,
5966 struct sctp_tmit_chunk *chk, *nchk;
5968 SCTP_TCB_LOCK_ASSERT(stcb);
5969 if ((asoc->peer_supports_prsctp) &&
5970 (asoc->sent_queue_cnt_removeable > 0)) {
5971 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
5973 * Look for chunks marked with the PR_SCTP flag AND
5974 * the buffer space flag. If the one being sent is
5975 * equal or greater priority then purge the old one
5976 * and free some space.
5978 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
5980 * This one is PR-SCTP AND buffer space
5983 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
5985 * Lower numbers equates to higher
5986 * priority so if the one we are
5987 * looking at has a larger or equal
5988 * priority we want to drop the data
5989 * and NOT retransmit it.
5993 * We release the book_size
5994 * if the mbuf is here
5999 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6003 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6006 freed_spc += ret_spc;
6007 if (freed_spc >= dataout) {
6010 } /* if chunk was present */
6011 } /* if of sufficent priority */
6012 } /* if chunk has enabled */
6013 } /* tailqforeach */
6015 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6016 /* Here we must move to the sent queue and mark */
6017 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6018 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6021 * We release the book_size
6022 * if the mbuf is here
6026 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6029 freed_spc += ret_spc;
6030 if (freed_spc >= dataout) {
6033 } /* end if chk->data */
6034 } /* end if right class */
6035 } /* end if chk pr-sctp */
6036 } /* tailqforeachsafe (chk) */
6037 } /* if enabled in asoc */
6041 sctp_get_frag_point(struct sctp_tcb *stcb,
6042 struct sctp_association *asoc)
6047 * For endpoints that have both v6 and v4 addresses we must reserve
6048 * room for the ipv6 header, for those that are only dealing with V4
6049 * we use a larger frag point.
6051 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6052 ovh = SCTP_MED_OVERHEAD;
6054 ovh = SCTP_MED_V4_OVERHEAD;
6057 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6058 siz = asoc->smallest_mtu - ovh;
6060 siz = (stcb->asoc.sctp_frag_point - ovh);
6062 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6064 /* A data chunk MUST fit in a cluster */
6065 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6068 /* adjust for an AUTH chunk if DATA requires auth */
6069 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6070 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6073 /* make it an even word boundary please */
6080 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6083 * We assume that the user wants PR_SCTP_TTL if the user provides a
6084 * positive lifetime but does not specify any PR_SCTP policy.
6086 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6087 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6088 } else if (sp->timetolive > 0) {
6089 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6090 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6094 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6095 case CHUNK_FLAGS_PR_SCTP_BUF:
6097 * Time to live is a priority stored in tv_sec when doing
6098 * the buffer drop thing.
6100 sp->ts.tv_sec = sp->timetolive;
6103 case CHUNK_FLAGS_PR_SCTP_TTL:
6107 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6108 tv.tv_sec = sp->timetolive / 1000;
6109 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6111 * TODO sctp_constants.h needs alternative time
6112 * macros when _KERNEL is undefined.
6114 timevaladd(&sp->ts, &tv);
6117 case CHUNK_FLAGS_PR_SCTP_RTX:
6119 * Time to live is a the number or retransmissions stored in
6122 sp->ts.tv_sec = sp->timetolive;
6126 SCTPDBG(SCTP_DEBUG_USRREQ1,
6127 "Unknown PR_SCTP policy %u.\n",
6128 PR_SCTP_POLICY(sp->sinfo_flags));
6134 sctp_msg_append(struct sctp_tcb *stcb,
6135 struct sctp_nets *net,
6137 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6141 struct sctp_stream_queue_pending *sp = NULL;
6142 struct sctp_stream_out *strm;
6145 * Given an mbuf chain, put it into the association send queue and
6146 * place it on the wheel
6148 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6149 /* Invalid stream number */
6150 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6154 if ((stcb->asoc.stream_locked) &&
6155 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6156 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6160 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6161 /* Now can we send this? */
6162 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6163 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6164 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6165 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6166 /* got data while shutting down */
6167 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6171 sctp_alloc_a_strmoq(stcb, sp);
6173 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6177 sp->sinfo_flags = srcv->sinfo_flags;
6178 sp->timetolive = srcv->sinfo_timetolive;
6179 sp->ppid = srcv->sinfo_ppid;
6180 sp->context = srcv->sinfo_context;
6181 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6183 atomic_add_int(&sp->net->ref_count, 1);
6187 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6188 sp->stream = srcv->sinfo_stream;
6189 sp->msg_is_complete = 1;
6190 sp->sender_all_done = 1;
6193 sp->tail_mbuf = NULL;
6194 sctp_set_prsctp_policy(sp);
6196 * We could in theory (for sendall) sifa the length in, but we would
6197 * still have to hunt through the chain since we need to setup the
6201 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6202 if (SCTP_BUF_NEXT(at) == NULL)
6204 sp->length += SCTP_BUF_LEN(at);
6206 if (srcv->sinfo_keynumber_valid) {
6207 sp->auth_keyid = srcv->sinfo_keynumber;
6209 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6211 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6212 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6213 sp->holds_key_ref = 1;
6215 if (hold_stcb_lock == 0) {
6216 SCTP_TCB_SEND_LOCK(stcb);
6218 sctp_snd_sb_alloc(stcb, sp->length);
6219 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6220 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6221 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6223 if (hold_stcb_lock == 0) {
6224 SCTP_TCB_SEND_UNLOCK(stcb);
6234 static struct mbuf *
6235 sctp_copy_mbufchain(struct mbuf *clonechain,
6236 struct mbuf *outchain,
6237 struct mbuf **endofchain,
6240 uint8_t copy_by_ref)
6243 struct mbuf *appendchain;
6247 if (endofchain == NULL) {
6251 sctp_m_freem(outchain);
6254 if (can_take_mbuf) {
6255 appendchain = clonechain;
6258 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6260 /* Its not in a cluster */
6261 if (*endofchain == NULL) {
6262 /* lets get a mbuf cluster */
6263 if (outchain == NULL) {
6264 /* This is the general case */
6266 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6267 if (outchain == NULL) {
6270 SCTP_BUF_LEN(outchain) = 0;
6271 *endofchain = outchain;
6272 /* get the prepend space */
6273 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6276 * We really should not get a NULL
6282 if (SCTP_BUF_NEXT(m) == NULL) {
6286 m = SCTP_BUF_NEXT(m);
6289 if (*endofchain == NULL) {
6291 * huh, TSNH XXX maybe we
6294 sctp_m_freem(outchain);
6298 /* get the new end of length */
6299 len = M_TRAILINGSPACE(*endofchain);
6301 /* how much is left at the end? */
6302 len = M_TRAILINGSPACE(*endofchain);
6304 /* Find the end of the data, for appending */
6305 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6307 /* Now lets copy it out */
6308 if (len >= sizeofcpy) {
6309 /* It all fits, copy it in */
6310 m_copydata(clonechain, 0, sizeofcpy, cp);
6311 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6313 /* fill up the end of the chain */
6315 m_copydata(clonechain, 0, len, cp);
6316 SCTP_BUF_LEN((*endofchain)) += len;
6317 /* now we need another one */
6320 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6325 SCTP_BUF_NEXT((*endofchain)) = m;
6327 cp = mtod((*endofchain), caddr_t);
6328 m_copydata(clonechain, len, sizeofcpy, cp);
6329 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6333 /* copy the old fashion way */
6334 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_DONTWAIT);
6335 #ifdef SCTP_MBUF_LOGGING
6336 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6339 for (mat = appendchain; mat; mat = SCTP_BUF_NEXT(mat)) {
6340 if (SCTP_BUF_IS_EXTENDED(mat)) {
6341 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6348 if (appendchain == NULL) {
6351 sctp_m_freem(outchain);
6355 /* tack on to the end */
6356 if (*endofchain != NULL) {
6357 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6361 if (SCTP_BUF_NEXT(m) == NULL) {
6362 SCTP_BUF_NEXT(m) = appendchain;
6365 m = SCTP_BUF_NEXT(m);
6369 * save off the end and update the end-chain postion
6373 if (SCTP_BUF_NEXT(m) == NULL) {
6377 m = SCTP_BUF_NEXT(m);
6381 /* save off the end and update the end-chain postion */
6384 if (SCTP_BUF_NEXT(m) == NULL) {
6388 m = SCTP_BUF_NEXT(m);
6390 return (appendchain);
6395 sctp_med_chunk_output(struct sctp_inpcb *inp,
6396 struct sctp_tcb *stcb,
6397 struct sctp_association *asoc,
6400 int control_only, int from_where,
6401 struct timeval *now, int *now_filled, int frag_point, int so_locked
6402 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6408 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6409 uint32_t val SCTP_UNUSED)
6411 struct sctp_copy_all *ca;
6414 int added_control = 0;
6415 int un_sent, do_chunk_output = 1;
6416 struct sctp_association *asoc;
6417 struct sctp_nets *net;
6419 ca = (struct sctp_copy_all *)ptr;
6420 if (ca->m == NULL) {
6423 if (ca->inp != inp) {
6427 if (ca->sndlen > 0) {
6428 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_DONTWAIT);
6430 /* can't copy so we are done */
6434 #ifdef SCTP_MBUF_LOGGING
6435 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6438 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6439 if (SCTP_BUF_IS_EXTENDED(mat)) {
6440 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6448 SCTP_TCB_LOCK_ASSERT(stcb);
6449 if (stcb->asoc.alternate) {
6450 net = stcb->asoc.alternate;
6452 net = stcb->asoc.primary_destination;
6454 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6455 /* Abort this assoc with m as the user defined reason */
6457 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6459 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6460 0, M_NOWAIT, 1, MT_DATA);
6461 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6464 struct sctp_paramhdr *ph;
6466 ph = mtod(m, struct sctp_paramhdr *);
6467 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6468 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
6471 * We add one here to keep the assoc from dis-appearing on
6474 atomic_add_int(&stcb->asoc.refcnt, 1);
6475 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6477 * sctp_abort_an_association calls sctp_free_asoc() free
6478 * association will NOT free it since we incremented the
6479 * refcnt .. we do this to prevent it being freed and things
6480 * getting tricky since we could end up (from free_asoc)
6481 * calling inpcb_free which would get a recursive lock call
6482 * to the iterator lock.. But as a consequence of that the
6483 * stcb will return to us un-locked.. since free_asoc
6484 * returns with either no TCB or the TCB unlocked, we must
6485 * relock.. to unlock in the iterator timer :-0
6487 SCTP_TCB_LOCK(stcb);
6488 atomic_add_int(&stcb->asoc.refcnt, -1);
6489 goto no_chunk_output;
6492 ret = sctp_msg_append(stcb, net, m,
6496 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6497 /* shutdown this assoc */
6500 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6502 if (TAILQ_EMPTY(&asoc->send_queue) &&
6503 TAILQ_EMPTY(&asoc->sent_queue) &&
6505 if (asoc->locked_on_sending) {
6509 * there is nothing queued to send, so I'm
6512 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6513 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6514 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6516 * only send SHUTDOWN the first time
6519 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6520 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6522 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6523 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6524 sctp_stop_timers_for_shutdown(stcb);
6525 sctp_send_shutdown(stcb, net);
6526 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6528 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6529 asoc->primary_destination);
6531 do_chunk_output = 0;
6535 * we still got (or just got) data to send,
6536 * so set SHUTDOWN_PENDING
6539 * XXX sockets draft says that SCTP_EOF
6540 * should be sent with no data. currently,
6541 * we will allow user data to be sent first
6542 * and move to SHUTDOWN-PENDING
6544 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6545 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6546 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6547 if (asoc->locked_on_sending) {
6549 * Locked to send out the
6552 struct sctp_stream_queue_pending *sp;
6554 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6556 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6557 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6560 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6561 if (TAILQ_EMPTY(&asoc->send_queue) &&
6562 TAILQ_EMPTY(&asoc->sent_queue) &&
6563 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6565 atomic_add_int(&stcb->asoc.refcnt, 1);
6566 sctp_abort_an_association(stcb->sctp_ep, stcb,
6567 NULL, SCTP_SO_NOT_LOCKED);
6568 atomic_add_int(&stcb->asoc.refcnt, -1);
6569 goto no_chunk_output;
6571 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6572 asoc->primary_destination);
6578 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6579 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6581 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6582 (stcb->asoc.total_flight > 0) &&
6583 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6584 do_chunk_output = 0;
6586 if (do_chunk_output)
6587 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6588 else if (added_control) {
6589 int num_out = 0, reason = 0, now_filled = 0;
6593 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6594 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6595 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6606 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6608 struct sctp_copy_all *ca;
6610 ca = (struct sctp_copy_all *)ptr;
6612 * Do a notify here? Kacheong suggests that the notify be done at
6613 * the send time.. so you would push up a notification if any send
6614 * failed. Don't know if this is feasable since the only failures we
6615 * have is "memory" related and if you cannot get an mbuf to send
6616 * the data you surely can't get an mbuf to send up to notify the
6617 * user you can't send the data :->
6620 /* now free everything */
6621 sctp_m_freem(ca->m);
6622 SCTP_FREE(ca, SCTP_M_COPYAL);
6626 #define MC_ALIGN(m, len) do { \
6627 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \
6632 static struct mbuf *
6633 sctp_copy_out_all(struct uio *uio, int len)
6635 struct mbuf *ret, *at;
6636 int left, willcpy, cancpy, error;
6638 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAIT, 1, MT_DATA);
6644 SCTP_BUF_LEN(ret) = 0;
6645 /* save space for the data chunk header */
6646 cancpy = M_TRAILINGSPACE(ret);
6647 willcpy = min(cancpy, left);
6650 /* Align data to the end */
6651 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6657 SCTP_BUF_LEN(at) = willcpy;
6658 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6661 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAIT, 1, MT_DATA);
6662 if (SCTP_BUF_NEXT(at) == NULL) {
6665 at = SCTP_BUF_NEXT(at);
6666 SCTP_BUF_LEN(at) = 0;
6667 cancpy = M_TRAILINGSPACE(at);
6668 willcpy = min(cancpy, left);
6675 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6676 struct sctp_sndrcvinfo *srcv)
6679 struct sctp_copy_all *ca;
6681 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6685 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6688 memset(ca, 0, sizeof(struct sctp_copy_all));
6692 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6695 * take off the sendall flag, it would be bad if we failed to do
6698 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6699 /* get length and mbuf chain */
6701 ca->sndlen = uio->uio_resid;
6702 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6703 if (ca->m == NULL) {
6704 SCTP_FREE(ca, SCTP_M_COPYAL);
6705 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6709 /* Gather the length of the send */
6713 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6714 ca->sndlen += SCTP_BUF_LEN(mat);
6717 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6718 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6719 SCTP_ASOC_ANY_STATE,
6721 sctp_sendall_completes, inp, 1);
6723 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6724 SCTP_FREE(ca, SCTP_M_COPYAL);
6725 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6733 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6735 struct sctp_tmit_chunk *chk, *nchk;
6737 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6738 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6739 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6741 sctp_m_freem(chk->data);
6744 asoc->ctrl_queue_cnt--;
6745 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6751 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6753 struct sctp_association *asoc;
6754 struct sctp_tmit_chunk *chk, *nchk;
6755 struct sctp_asconf_chunk *acp;
6758 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6759 /* find SCTP_ASCONF chunk in queue */
6760 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6762 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6763 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6768 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6770 sctp_m_freem(chk->data);
6773 asoc->ctrl_queue_cnt--;
6774 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6781 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6782 struct sctp_association *asoc,
6783 struct sctp_tmit_chunk **data_list,
6785 struct sctp_nets *net)
6788 struct sctp_tmit_chunk *tp1;
6790 for (i = 0; i < bundle_at; i++) {
6791 /* off of the send queue */
6792 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6793 asoc->send_queue_cnt--;
6796 * Any chunk NOT 0 you zap the time chunk 0 gets
6797 * zapped or set based on if a RTO measurment is
6800 data_list[i]->do_rtt = 0;
6803 data_list[i]->sent_rcv_time = net->last_sent_time;
6804 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6805 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6806 if (data_list[i]->whoTo == NULL) {
6807 data_list[i]->whoTo = net;
6808 atomic_add_int(&net->ref_count, 1);
6810 /* on to the sent queue */
6811 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6812 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6813 struct sctp_tmit_chunk *tpp;
6815 /* need to move back */
6817 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6819 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6823 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6826 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6828 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6833 /* This does not lower until the cum-ack passes it */
6834 asoc->sent_queue_cnt++;
6835 if ((asoc->peers_rwnd <= 0) &&
6836 (asoc->total_flight == 0) &&
6838 /* Mark the chunk as being a window probe */
6839 SCTP_STAT_INCR(sctps_windowprobed);
6841 #ifdef SCTP_AUDITING_ENABLED
6842 sctp_audit_log(0xC2, 3);
6844 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6845 data_list[i]->snd_count = 1;
6846 data_list[i]->rec.data.chunk_was_revoked = 0;
6847 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6848 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6849 data_list[i]->whoTo->flight_size,
6850 data_list[i]->book_size,
6851 (uintptr_t) data_list[i]->whoTo,
6852 data_list[i]->rec.data.TSN_seq);
6854 sctp_flight_size_increase(data_list[i]);
6855 sctp_total_flight_increase(stcb, data_list[i]);
6856 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6857 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6858 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6860 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6861 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6862 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6863 /* SWS sender side engages */
6864 asoc->peers_rwnd = 0;
6867 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6868 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
6873 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
6874 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6879 struct sctp_tmit_chunk *chk, *nchk;
6881 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6882 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
6883 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
6884 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
6885 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
6886 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
6887 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
6888 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
6889 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
6890 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
6891 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
6892 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
6893 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
6894 /* Stray chunks must be cleaned up */
6896 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6898 sctp_m_freem(chk->data);
6901 asoc->ctrl_queue_cnt--;
6902 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
6903 asoc->fwd_tsn_cnt--;
6904 sctp_free_a_chunk(stcb, chk, so_locked);
6905 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
6906 /* special handling, we must look into the param */
6907 if (chk != asoc->str_reset) {
6908 goto clean_up_anyway;
6916 sctp_can_we_split_this(struct sctp_tcb *stcb,
6918 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
6921 * Make a decision on if I should split a msg into multiple parts.
6922 * This is only asked of incomplete messages.
6926 * If we are doing EEOR we need to always send it if its the
6927 * entire thing, since it might be all the guy is putting in
6930 if (goal_mtu >= length) {
6932 * If we have data outstanding,
6933 * we get another chance when the sack
6934 * arrives to transmit - wait for more data
6936 if (stcb->asoc.total_flight == 0) {
6938 * If nothing is in flight, we zero the
6946 /* You can fill the rest */
6951 * For those strange folk that make the send buffer
6952 * smaller than our fragmentation point, we can't
6953 * get a full msg in so we have to allow splitting.
6955 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
6958 if ((length <= goal_mtu) ||
6959 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
6960 /* Sub-optimial residual don't split in non-eeor mode. */
6964 * If we reach here length is larger than the goal_mtu. Do we wish
6965 * to split it for the sake of packet putting together?
6967 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
6968 /* Its ok to split it */
6969 return (min(goal_mtu, frag_point));
6971 /* Nope, can't split */
6977 sctp_move_to_outqueue(struct sctp_tcb *stcb,
6978 struct sctp_stream_out *strq,
6980 uint32_t frag_point,
6986 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6991 /* Move from the stream to the send_queue keeping track of the total */
6992 struct sctp_association *asoc;
6993 struct sctp_stream_queue_pending *sp;
6994 struct sctp_tmit_chunk *chk;
6995 struct sctp_data_chunk *dchkh;
6996 uint32_t to_move, length;
6997 uint8_t rcv_flags = 0;
6999 uint8_t send_lock_up = 0;
7001 SCTP_TCB_LOCK_ASSERT(stcb);
7004 /* sa_ignore FREED_MEMORY */
7005 sp = TAILQ_FIRST(&strq->outqueue);
7008 if (send_lock_up == 0) {
7009 SCTP_TCB_SEND_LOCK(stcb);
7012 sp = TAILQ_FIRST(&strq->outqueue);
7016 if (strq->last_msg_incomplete) {
7017 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7019 strq->last_msg_incomplete);
7020 strq->last_msg_incomplete = 0;
7024 SCTP_TCB_SEND_UNLOCK(stcb);
7029 if ((sp->msg_is_complete) && (sp->length == 0)) {
7030 if (sp->sender_all_done) {
7032 * We are doing differed cleanup. Last time through
7033 * when we took all the data the sender_all_done was
7036 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7037 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7038 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7039 sp->sender_all_done,
7041 sp->msg_is_complete,
7045 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7046 SCTP_TCB_SEND_LOCK(stcb);
7049 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7050 TAILQ_REMOVE(&strq->outqueue, sp, next);
7051 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7053 sctp_free_remote_addr(sp->net);
7057 sctp_m_freem(sp->data);
7060 sctp_free_a_strmoq(stcb, sp, so_locked);
7061 /* we can't be locked to it */
7063 stcb->asoc.locked_on_sending = NULL;
7065 SCTP_TCB_SEND_UNLOCK(stcb);
7068 /* back to get the next msg */
7072 * sender just finished this but still holds a
7081 /* is there some to get */
7082 if (sp->length == 0) {
7088 } else if (sp->discard_rest) {
7089 if (send_lock_up == 0) {
7090 SCTP_TCB_SEND_LOCK(stcb);
7093 /* Whack down the size */
7094 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7095 if ((stcb->sctp_socket != NULL) && \
7096 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7097 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7098 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7101 sctp_m_freem(sp->data);
7103 sp->tail_mbuf = NULL;
7113 some_taken = sp->some_taken;
7114 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7115 sp->msg_is_complete = 1;
7118 length = sp->length;
7119 if (sp->msg_is_complete) {
7120 /* The message is complete */
7121 to_move = min(length, frag_point);
7122 if (to_move == length) {
7123 /* All of it fits in the MTU */
7124 if (sp->some_taken) {
7125 rcv_flags |= SCTP_DATA_LAST_FRAG;
7126 sp->put_last_out = 1;
7128 rcv_flags |= SCTP_DATA_NOT_FRAG;
7129 sp->put_last_out = 1;
7132 /* Not all of it fits, we fragment */
7133 if (sp->some_taken == 0) {
7134 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7139 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7142 * We use a snapshot of length in case it
7143 * is expanding during the compare.
7148 if (to_move >= llen) {
7150 if (send_lock_up == 0) {
7152 * We are taking all of an incomplete msg
7153 * thus we need a send lock.
7155 SCTP_TCB_SEND_LOCK(stcb);
7157 if (sp->msg_is_complete) {
7159 * the sender finished the
7166 if (sp->some_taken == 0) {
7167 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7171 /* Nothing to take. */
7172 if (sp->some_taken) {
7181 /* If we reach here, we can copy out a chunk */
7182 sctp_alloc_a_chunk(stcb, chk);
7184 /* No chunk memory */
7190 * Setup for unordered if needed by looking at the user sent info
7193 if (sp->sinfo_flags & SCTP_UNORDERED) {
7194 rcv_flags |= SCTP_DATA_UNORDERED;
7196 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7197 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7198 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7200 /* clear out the chunk before setting up */
7201 memset(chk, 0, sizeof(*chk));
7202 chk->rec.data.rcv_flags = rcv_flags;
7204 if (to_move >= length) {
7205 /* we think we can steal the whole thing */
7206 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7207 SCTP_TCB_SEND_LOCK(stcb);
7210 if (to_move < sp->length) {
7211 /* bail, it changed */
7214 chk->data = sp->data;
7215 chk->last_mbuf = sp->tail_mbuf;
7216 /* register the stealing */
7217 sp->data = sp->tail_mbuf = NULL;
7222 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_DONTWAIT);
7223 chk->last_mbuf = NULL;
7224 if (chk->data == NULL) {
7225 sp->some_taken = some_taken;
7226 sctp_free_a_chunk(stcb, chk, so_locked);
7231 #ifdef SCTP_MBUF_LOGGING
7232 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7235 for (mat = chk->data; mat; mat = SCTP_BUF_NEXT(mat)) {
7236 if (SCTP_BUF_IS_EXTENDED(mat)) {
7237 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
7242 /* Pull off the data */
7243 m_adj(sp->data, to_move);
7244 /* Now lets work our way down and compact it */
7246 while (m && (SCTP_BUF_LEN(m) == 0)) {
7247 sp->data = SCTP_BUF_NEXT(m);
7248 SCTP_BUF_NEXT(m) = NULL;
7249 if (sp->tail_mbuf == m) {
7251 * Freeing tail? TSNH since
7252 * we supposedly were taking less
7253 * than the sp->length.
7256 panic("Huh, freing tail? - TSNH");
7258 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7259 sp->tail_mbuf = sp->data = NULL;
7268 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7269 chk->copy_by_ref = 1;
7271 chk->copy_by_ref = 0;
7274 * get last_mbuf and counts of mb useage This is ugly but hopefully
7275 * its only one mbuf.
7277 if (chk->last_mbuf == NULL) {
7278 chk->last_mbuf = chk->data;
7279 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7280 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7283 if (to_move > length) {
7284 /*- This should not happen either
7285 * since we always lower to_move to the size
7286 * of sp->length if its larger.
7289 panic("Huh, how can to_move be larger?");
7291 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7295 atomic_subtract_int(&sp->length, to_move);
7297 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7298 /* Not enough room for a chunk header, get some */
7301 m = sctp_get_mbuf_for_msg(1, 0, M_DONTWAIT, 0, MT_DATA);
7304 * we're in trouble here. _PREPEND below will free
7305 * all the data if there is no leading space, so we
7306 * must put the data back and restore.
7308 if (send_lock_up == 0) {
7309 SCTP_TCB_SEND_LOCK(stcb);
7312 if (chk->data == NULL) {
7313 /* unsteal the data */
7314 sp->data = chk->data;
7315 sp->tail_mbuf = chk->last_mbuf;
7319 /* reassemble the data */
7321 sp->data = chk->data;
7322 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7324 sp->some_taken = some_taken;
7325 atomic_add_int(&sp->length, to_move);
7328 sctp_free_a_chunk(stcb, chk, so_locked);
7332 SCTP_BUF_LEN(m) = 0;
7333 SCTP_BUF_NEXT(m) = chk->data;
7335 M_ALIGN(chk->data, 4);
7338 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT);
7339 if (chk->data == NULL) {
7340 /* HELP, TSNH since we assured it would not above? */
7342 panic("prepend failes HELP?");
7344 SCTP_PRINTF("prepend fails HELP?\n");
7345 sctp_free_a_chunk(stcb, chk, so_locked);
7351 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7352 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7353 chk->book_size_scale = 0;
7354 chk->sent = SCTP_DATAGRAM_UNSENT;
7357 chk->asoc = &stcb->asoc;
7358 chk->pad_inplace = 0;
7359 chk->no_fr_allowed = 0;
7360 chk->rec.data.stream_seq = strq->next_sequence_send;
7361 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7362 strq->next_sequence_send++;
7364 chk->rec.data.stream_number = sp->stream;
7365 chk->rec.data.payloadtype = sp->ppid;
7366 chk->rec.data.context = sp->context;
7367 chk->rec.data.doing_fast_retransmit = 0;
7369 chk->rec.data.timetodrop = sp->ts;
7370 chk->flags = sp->act_flags;
7373 chk->whoTo = sp->net;
7374 atomic_add_int(&chk->whoTo->ref_count, 1);
7378 if (sp->holds_key_ref) {
7379 chk->auth_keyid = sp->auth_keyid;
7380 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7381 chk->holds_key_ref = 1;
7383 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7384 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7385 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7386 (uintptr_t) stcb, sp->length,
7387 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7388 chk->rec.data.TSN_seq);
7390 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7392 * Put the rest of the things in place now. Size was done earlier in
7393 * previous loop prior to padding.
7396 #ifdef SCTP_ASOCLOG_OF_TSNS
7397 SCTP_TCB_LOCK_ASSERT(stcb);
7398 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7399 asoc->tsn_out_at = 0;
7400 asoc->tsn_out_wrapped = 1;
7402 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7403 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7404 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7405 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7406 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7407 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7408 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7409 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7413 dchkh->ch.chunk_type = SCTP_DATA;
7414 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7415 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7416 dchkh->dp.stream_id = htons(strq->stream_no);
7417 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7418 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7419 dchkh->ch.chunk_length = htons(chk->send_size);
7420 /* Now advance the chk->send_size by the actual pad needed. */
7421 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7426 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7427 if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) {
7428 chk->pad_inplace = 1;
7430 if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) {
7431 /* pad added an mbuf */
7432 chk->last_mbuf = lm;
7434 chk->send_size += pads;
7436 if (PR_SCTP_ENABLED(chk->flags)) {
7437 asoc->pr_sctp_cnt++;
7439 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7440 /* All done pull and kill the message */
7441 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7442 if (sp->put_last_out == 0) {
7443 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7444 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7445 sp->sender_all_done,
7447 sp->msg_is_complete,
7451 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7452 SCTP_TCB_SEND_LOCK(stcb);
7455 TAILQ_REMOVE(&strq->outqueue, sp, next);
7456 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7458 sctp_free_remote_addr(sp->net);
7462 sctp_m_freem(sp->data);
7465 sctp_free_a_strmoq(stcb, sp, so_locked);
7467 /* we can't be locked to it */
7469 stcb->asoc.locked_on_sending = NULL;
7471 /* more to go, we are locked */
7474 asoc->chunks_on_out_queue++;
7475 strq->chunks_on_queues++;
7476 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7477 asoc->send_queue_cnt++;
7480 SCTP_TCB_SEND_UNLOCK(stcb);
7487 sctp_fill_outqueue(struct sctp_tcb *stcb,
7488 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7489 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7494 struct sctp_association *asoc;
7495 struct sctp_stream_out *strq;
7496 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7499 SCTP_TCB_LOCK_ASSERT(stcb);
7501 switch (net->ro._l_addr.sa.sa_family) {
7504 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7509 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7514 goal_mtu = net->mtu;
7517 /* Need an allowance for the data chunk header too */
7518 goal_mtu -= sizeof(struct sctp_data_chunk);
7520 /* must make even word boundary */
7521 goal_mtu &= 0xfffffffc;
7522 if (asoc->locked_on_sending) {
7523 /* We are stuck on one stream until the message completes. */
7524 strq = asoc->locked_on_sending;
7527 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7530 while ((goal_mtu > 0) && strq) {
7533 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7534 &giveup, eeor_mode, &bail, so_locked);
7536 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7539 asoc->locked_on_sending = strq;
7540 if ((moved_how_much == 0) || (giveup) || bail)
7541 /* no more to move for now */
7544 asoc->locked_on_sending = NULL;
7545 if ((giveup) || bail) {
7548 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7553 total_moved += moved_how_much;
7554 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7555 goal_mtu &= 0xfffffffc;
7560 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7562 if (total_moved == 0) {
7563 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7564 (net == stcb->asoc.primary_destination)) {
7565 /* ran dry for primary network net */
7566 SCTP_STAT_INCR(sctps_primary_randry);
7567 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7568 /* ran dry with CMT on */
7569 SCTP_STAT_INCR(sctps_cmt_randry);
7575 sctp_fix_ecn_echo(struct sctp_association *asoc)
7577 struct sctp_tmit_chunk *chk;
7579 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7580 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7581 chk->sent = SCTP_DATAGRAM_UNSENT;
7587 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7589 struct sctp_association *asoc;
7590 struct sctp_tmit_chunk *chk;
7591 struct sctp_stream_queue_pending *sp;
7598 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7599 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7600 if (sp->net == net) {
7601 sctp_free_remote_addr(sp->net);
7606 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7607 if (chk->whoTo == net) {
7608 sctp_free_remote_addr(chk->whoTo);
7615 sctp_med_chunk_output(struct sctp_inpcb *inp,
7616 struct sctp_tcb *stcb,
7617 struct sctp_association *asoc,
7620 int control_only, int from_where,
7621 struct timeval *now, int *now_filled, int frag_point, int so_locked
7622 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7628 * Ok this is the generic chunk service queue. we must do the
7629 * following: - Service the stream queue that is next, moving any
7630 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7631 * LAST to the out queue in one pass) and assigning TSN's - Check to
7632 * see if the cwnd/rwnd allows any output, if so we go ahead and
7633 * fomulate and send the low level chunks. Making sure to combine
7634 * any control in the control chunk queue also.
7636 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7637 struct mbuf *outchain, *endoutchain;
7638 struct sctp_tmit_chunk *chk, *nchk;
7640 /* temp arrays for unlinking */
7641 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7642 int no_fragmentflg, error;
7643 unsigned int max_rwnd_per_dest, max_send_per_dest;
7644 int one_chunk, hbflag, skip_data_for_this_net;
7645 int asconf, cookie, no_out_cnt;
7646 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7647 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7649 uint32_t auth_offset = 0;
7650 struct sctp_auth_chunk *auth = NULL;
7651 uint16_t auth_keyid;
7652 int override_ok = 1;
7653 int skip_fill_up = 0;
7654 int data_auth_reqd = 0;
7657 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7663 auth_keyid = stcb->asoc.authinfo.active_keyid;
7665 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7666 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7667 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7672 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7674 * First lets prime the pump. For each destination, if there is room
7675 * in the flight size, attempt to pull an MTU's worth out of the
7676 * stream queues into the general send_queue
7678 #ifdef SCTP_AUDITING_ENABLED
7679 sctp_audit_log(0xC2, 2);
7681 SCTP_TCB_LOCK_ASSERT(stcb);
7683 if ((control_only) || (asoc->stream_reset_outstanding))
7688 /* Nothing to possible to send? */
7689 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7690 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7691 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7692 TAILQ_EMPTY(&asoc->send_queue) &&
7693 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7698 if (asoc->peers_rwnd == 0) {
7699 /* No room in peers rwnd */
7701 if (asoc->total_flight > 0) {
7702 /* we are allowed one chunk in flight */
7706 if (stcb->asoc.ecn_echo_cnt_onq) {
7707 /* Record where a sack goes, if any */
7708 if (no_data_chunks &&
7709 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7710 /* Nothing but ECNe to send - we don't do that */
7711 goto nothing_to_send;
7713 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7714 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7715 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7716 sack_goes_to = chk->whoTo;
7721 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7722 if (stcb->sctp_socket)
7723 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7725 max_send_per_dest = 0;
7726 if (no_data_chunks == 0) {
7727 /* How many non-directed chunks are there? */
7728 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7729 if (chk->whoTo == NULL) {
7731 * We already have non-directed chunks on
7732 * the queue, no need to do a fill-up.
7740 if ((no_data_chunks == 0) &&
7741 (skip_fill_up == 0) &&
7742 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7743 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7745 * This for loop we are in takes in each net, if
7746 * its's got space in cwnd and has data sent to it
7747 * (when CMT is off) then it calls
7748 * sctp_fill_outqueue for the net. This gets data on
7749 * the send queue for that network.
7751 * In sctp_fill_outqueue TSN's are assigned and data is
7752 * copied out of the stream buffers. Note mostly
7753 * copy by reference (we hope).
7755 net->window_probe = 0;
7756 if ((net != stcb->asoc.alternate) &&
7757 ((net->dest_state & SCTP_ADDR_PF) ||
7758 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7759 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7760 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7761 sctp_log_cwnd(stcb, net, 1,
7762 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7766 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7767 (net->flight_size == 0)) {
7768 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7770 if (net->flight_size >= net->cwnd) {
7771 /* skip this network, no room - can't fill */
7772 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7773 sctp_log_cwnd(stcb, net, 3,
7774 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7778 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7779 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7781 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7783 /* memory alloc failure */
7789 /* now service each destination and send out what we can for it */
7790 /* Nothing to send? */
7791 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7792 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7793 TAILQ_EMPTY(&asoc->send_queue)) {
7797 if (asoc->sctp_cmt_on_off > 0) {
7798 /* get the last start point */
7799 start_at = asoc->last_net_cmt_send_started;
7800 if (start_at == NULL) {
7801 /* null so to beginning */
7802 start_at = TAILQ_FIRST(&asoc->nets);
7804 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7805 if (start_at == NULL) {
7806 start_at = TAILQ_FIRST(&asoc->nets);
7809 asoc->last_net_cmt_send_started = start_at;
7811 start_at = TAILQ_FIRST(&asoc->nets);
7813 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7814 if (chk->whoTo == NULL) {
7815 if (asoc->alternate) {
7816 chk->whoTo = asoc->alternate;
7818 chk->whoTo = asoc->primary_destination;
7820 atomic_add_int(&chk->whoTo->ref_count, 1);
7823 old_start_at = NULL;
7824 again_one_more_time:
7825 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7826 /* how much can we send? */
7827 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7828 if (old_start_at && (old_start_at == net)) {
7829 /* through list ocmpletely. */
7833 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7834 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7835 (net->flight_size >= net->cwnd)) {
7837 * Nothing on control or asconf and flight is full,
7838 * we can skip even in the CMT case.
7843 endoutchain = outchain = NULL;
7846 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7847 skip_data_for_this_net = 1;
7849 skip_data_for_this_net = 0;
7851 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7853 * if we have a route and an ifp check to see if we
7854 * have room to send to this guy
7858 ifp = net->ro.ro_rt->rt_ifp;
7859 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
7860 SCTP_STAT_INCR(sctps_ifnomemqueued);
7861 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
7862 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
7867 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7870 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
7875 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
7885 if (mtu > asoc->peers_rwnd) {
7886 if (asoc->total_flight > 0) {
7887 /* We have a packet in flight somewhere */
7888 r_mtu = asoc->peers_rwnd;
7890 /* We are always allowed to send one MTU out */
7897 /************************/
7898 /* ASCONF transmission */
7899 /************************/
7900 /* Now first lets go through the asconf queue */
7901 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
7902 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
7905 if (chk->whoTo == NULL) {
7906 if (asoc->alternate == NULL) {
7907 if (asoc->primary_destination != net) {
7911 if (asoc->alternate != net) {
7916 if (chk->whoTo != net) {
7920 if (chk->data == NULL) {
7923 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
7924 chk->sent != SCTP_DATAGRAM_RESEND) {
7928 * if no AUTH is yet included and this chunk
7929 * requires it, make sure to account for it. We
7930 * don't apply the size until the AUTH chunk is
7931 * actually added below in case there is no room for
7932 * this chunk. NOTE: we overload the use of "omtu"
7935 if ((auth == NULL) &&
7936 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
7937 stcb->asoc.peer_auth_chunks)) {
7938 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
7941 /* Here we do NOT factor the r_mtu */
7942 if ((chk->send_size < (int)(mtu - omtu)) ||
7943 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
7945 * We probably should glom the mbuf chain
7946 * from the chk->data for control but the
7947 * problem is it becomes yet one more level
7948 * of tracking to do if for some reason
7949 * output fails. Then I have got to
7950 * reconstruct the merged control chain.. el
7951 * yucko.. for now we take the easy way and
7955 * Add an AUTH chunk, if chunk requires it
7956 * save the offset into the chain for AUTH
7958 if ((auth == NULL) &&
7959 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
7960 stcb->asoc.peer_auth_chunks))) {
7961 outchain = sctp_add_auth_chunk(outchain,
7966 chk->rec.chunk_id.id);
7967 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
7969 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
7970 (int)chk->rec.chunk_id.can_take_data,
7971 chk->send_size, chk->copy_by_ref);
7972 if (outchain == NULL) {
7974 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
7977 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
7978 /* update our MTU size */
7979 if (mtu > (chk->send_size + omtu))
7980 mtu -= (chk->send_size + omtu);
7983 to_out += (chk->send_size + omtu);
7984 /* Do clear IP_DF ? */
7985 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
7988 if (chk->rec.chunk_id.can_take_data)
7991 * set hb flag since we can use these for
7997 * should sysctl this: don't bundle data
7998 * with ASCONF since it requires AUTH
8001 chk->sent = SCTP_DATAGRAM_SENT;
8002 if (chk->whoTo == NULL) {
8004 atomic_add_int(&net->ref_count, 1);
8009 * Ok we are out of room but we can
8010 * output without effecting the
8011 * flight size since this little guy
8012 * is a control only packet.
8014 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8016 * do NOT clear the asconf flag as
8017 * it is used to do appropriate
8018 * source address selection.
8020 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8021 (struct sockaddr *)&net->ro._l_addr,
8022 outchain, auth_offset, auth,
8023 stcb->asoc.authinfo.active_keyid,
8024 no_fragmentflg, 0, asconf,
8025 inp->sctp_lport, stcb->rport,
8026 htonl(stcb->asoc.peer_vtag),
8030 if (error == ENOBUFS) {
8031 asoc->ifp_had_enobuf = 1;
8032 SCTP_STAT_INCR(sctps_lowlevelerr);
8034 if (from_where == 0) {
8035 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8037 if (*now_filled == 0) {
8038 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8040 *now = net->last_sent_time;
8042 net->last_sent_time = *now;
8045 /* error, could not output */
8046 if (error == EHOSTUNREACH) {
8052 sctp_move_chunks_from_net(stcb, net);
8057 asoc->ifp_had_enobuf = 0;
8058 if (*now_filled == 0) {
8059 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8061 *now = net->last_sent_time;
8063 net->last_sent_time = *now;
8067 * increase the number we sent, if a
8068 * cookie is sent we don't tell them
8071 outchain = endoutchain = NULL;
8075 *num_out += ctl_cnt;
8076 /* recalc a clean slate and setup */
8077 switch (net->ro._l_addr.sa.sa_family) {
8080 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8085 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8098 /************************/
8099 /* Control transmission */
8100 /************************/
8101 /* Now first lets go through the control queue */
8102 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8103 if ((sack_goes_to) &&
8104 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8105 (chk->whoTo != sack_goes_to)) {
8107 * if we have a sack in queue, and we are
8108 * looking at an ecn echo that is NOT queued
8109 * to where the sack is going..
8111 if (chk->whoTo == net) {
8113 * Don't transmit it to where its
8114 * going (current net)
8117 } else if (sack_goes_to == net) {
8119 * But do transmit it to this
8122 goto skip_net_check;
8125 if (chk->whoTo == NULL) {
8126 if (asoc->alternate == NULL) {
8127 if (asoc->primary_destination != net) {
8131 if (asoc->alternate != net) {
8136 if (chk->whoTo != net) {
8141 if (chk->data == NULL) {
8144 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8146 * It must be unsent. Cookies and ASCONF's
8147 * hang around but there timers will force
8148 * when marked for resend.
8153 * if no AUTH is yet included and this chunk
8154 * requires it, make sure to account for it. We
8155 * don't apply the size until the AUTH chunk is
8156 * actually added below in case there is no room for
8157 * this chunk. NOTE: we overload the use of "omtu"
8160 if ((auth == NULL) &&
8161 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8162 stcb->asoc.peer_auth_chunks)) {
8163 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8166 /* Here we do NOT factor the r_mtu */
8167 if ((chk->send_size <= (int)(mtu - omtu)) ||
8168 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8170 * We probably should glom the mbuf chain
8171 * from the chk->data for control but the
8172 * problem is it becomes yet one more level
8173 * of tracking to do if for some reason
8174 * output fails. Then I have got to
8175 * reconstruct the merged control chain.. el
8176 * yucko.. for now we take the easy way and
8180 * Add an AUTH chunk, if chunk requires it
8181 * save the offset into the chain for AUTH
8183 if ((auth == NULL) &&
8184 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8185 stcb->asoc.peer_auth_chunks))) {
8186 outchain = sctp_add_auth_chunk(outchain,
8191 chk->rec.chunk_id.id);
8192 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8194 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8195 (int)chk->rec.chunk_id.can_take_data,
8196 chk->send_size, chk->copy_by_ref);
8197 if (outchain == NULL) {
8199 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8202 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8203 /* update our MTU size */
8204 if (mtu > (chk->send_size + omtu))
8205 mtu -= (chk->send_size + omtu);
8208 to_out += (chk->send_size + omtu);
8209 /* Do clear IP_DF ? */
8210 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8213 if (chk->rec.chunk_id.can_take_data)
8215 /* Mark things to be removed, if needed */
8216 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8217 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8218 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8219 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8220 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8221 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8222 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8223 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8224 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8225 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8226 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8227 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8230 /* remove these chunks at the end */
8231 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8232 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8233 /* turn off the timer */
8234 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8235 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8236 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8242 * Other chunks, since they have
8243 * timers running (i.e. COOKIE) we
8244 * just "trust" that it gets sent or
8248 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8251 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8253 * Increment ecne send count
8254 * here this means we may be
8255 * over-zealous in our
8256 * counting if the send
8257 * fails, but its the best
8258 * place to do it (we used
8259 * to do it in the queue of
8260 * the chunk, but that did
8261 * not tell how many times
8264 SCTP_STAT_INCR(sctps_sendecne);
8266 chk->sent = SCTP_DATAGRAM_SENT;
8267 if (chk->whoTo == NULL) {
8269 atomic_add_int(&net->ref_count, 1);
8275 * Ok we are out of room but we can
8276 * output without effecting the
8277 * flight size since this little guy
8278 * is a control only packet.
8281 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8283 * do NOT clear the asconf
8284 * flag as it is used to do
8285 * appropriate source
8286 * address selection.
8290 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8293 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8294 (struct sockaddr *)&net->ro._l_addr,
8297 stcb->asoc.authinfo.active_keyid,
8298 no_fragmentflg, 0, asconf,
8299 inp->sctp_lport, stcb->rport,
8300 htonl(stcb->asoc.peer_vtag),
8304 if (error == ENOBUFS) {
8305 asoc->ifp_had_enobuf = 1;
8306 SCTP_STAT_INCR(sctps_lowlevelerr);
8308 if (from_where == 0) {
8309 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8311 /* error, could not output */
8313 if (*now_filled == 0) {
8314 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8316 *now = net->last_sent_time;
8318 net->last_sent_time = *now;
8322 if (error == EHOSTUNREACH) {
8328 sctp_move_chunks_from_net(stcb, net);
8333 asoc->ifp_had_enobuf = 0;
8334 /* Only HB or ASCONF advances time */
8336 if (*now_filled == 0) {
8337 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8339 *now = net->last_sent_time;
8341 net->last_sent_time = *now;
8346 * increase the number we sent, if a
8347 * cookie is sent we don't tell them
8350 outchain = endoutchain = NULL;
8354 *num_out += ctl_cnt;
8355 /* recalc a clean slate and setup */
8356 switch (net->ro._l_addr.sa.sa_family) {
8359 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8364 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8377 /* JRI: if dest is in PF state, do not send data to it */
8378 if ((asoc->sctp_cmt_on_off > 0) &&
8379 (net != stcb->asoc.alternate) &&
8380 (net->dest_state & SCTP_ADDR_PF)) {
8383 if (net->flight_size >= net->cwnd) {
8386 if ((asoc->sctp_cmt_on_off > 0) &&
8387 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8388 (net->flight_size > max_rwnd_per_dest)) {
8392 * We need a specific accounting for the usage of the send
8393 * buffer. We also need to check the number of messages per
8394 * net. For now, this is better than nothing and it disabled
8397 if ((asoc->sctp_cmt_on_off > 0) &&
8398 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8399 (max_send_per_dest > 0) &&
8400 (net->flight_size > max_send_per_dest)) {
8403 /*********************/
8404 /* Data transmission */
8405 /*********************/
8407 * if AUTH for DATA is required and no AUTH has been added
8408 * yet, account for this in the mtu now... if no data can be
8409 * bundled, this adjustment won't matter anyways since the
8410 * packet will be going out...
8412 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8413 stcb->asoc.peer_auth_chunks);
8414 if (data_auth_reqd && (auth == NULL)) {
8415 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8417 /* now lets add any data within the MTU constraints */
8418 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8421 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8422 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8429 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8430 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8440 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8441 (skip_data_for_this_net == 0)) ||
8443 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8444 if (no_data_chunks) {
8445 /* let only control go out */
8449 if (net->flight_size >= net->cwnd) {
8450 /* skip this net, no room for data */
8454 if ((chk->whoTo != NULL) &&
8455 (chk->whoTo != net)) {
8456 /* Don't send the chunk on this net */
8459 if (asoc->sctp_cmt_on_off == 0) {
8460 if ((asoc->alternate) &&
8461 (asoc->alternate != net) &&
8462 (chk->whoTo == NULL)) {
8464 } else if ((net != asoc->primary_destination) &&
8465 (asoc->alternate == NULL) &&
8466 (chk->whoTo == NULL)) {
8470 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8472 * strange, we have a chunk that is
8473 * to big for its destination and
8474 * yet no fragment ok flag.
8475 * Something went wrong when the
8476 * PMTU changed...we did not mark
8477 * this chunk for some reason?? I
8478 * will fix it here by letting IP
8479 * fragment it for now and printing
8480 * a warning. This really should not
8483 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8484 chk->send_size, mtu);
8485 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8487 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8488 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8489 struct sctp_data_chunk *dchkh;
8491 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8492 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8494 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8495 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8496 /* ok we will add this one */
8499 * Add an AUTH chunk, if chunk
8500 * requires it, save the offset into
8501 * the chain for AUTH
8503 if (data_auth_reqd) {
8505 outchain = sctp_add_auth_chunk(outchain,
8511 auth_keyid = chk->auth_keyid;
8513 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8514 } else if (override_ok) {
8519 auth_keyid = chk->auth_keyid;
8521 } else if (auth_keyid != chk->auth_keyid) {
8529 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8530 chk->send_size, chk->copy_by_ref);
8531 if (outchain == NULL) {
8532 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8533 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8534 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8537 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8540 /* upate our MTU size */
8541 /* Do clear IP_DF ? */
8542 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8545 /* unsigned subtraction of mtu */
8546 if (mtu > chk->send_size)
8547 mtu -= chk->send_size;
8550 /* unsigned subtraction of r_mtu */
8551 if (r_mtu > chk->send_size)
8552 r_mtu -= chk->send_size;
8556 to_out += chk->send_size;
8557 if ((to_out > mx_mtu) && no_fragmentflg) {
8559 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8561 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8565 chk->window_probe = 0;
8566 data_list[bundle_at++] = chk;
8567 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8570 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8571 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8572 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8574 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8576 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8577 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8587 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8589 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8590 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8591 data_list[0]->window_probe = 1;
8592 net->window_probe = 1;
8598 * Must be sent in order of the
8599 * TSN's (on a network)
8603 } /* for (chunk gather loop for this net) */
8604 } /* if asoc.state OPEN */
8606 /* Is there something to send for this destination? */
8608 /* We may need to start a control timer or two */
8610 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8613 * do NOT clear the asconf flag as it is
8614 * used to do appropriate source address
8619 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8622 /* must start a send timer if data is being sent */
8623 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8625 * no timer running on this destination
8628 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8630 /* Now send it, if there is anything to send :> */
8631 if ((error = sctp_lowlevel_chunk_output(inp,
8634 (struct sockaddr *)&net->ro._l_addr,
8642 inp->sctp_lport, stcb->rport,
8643 htonl(stcb->asoc.peer_vtag),
8647 /* error, we could not output */
8648 if (error == ENOBUFS) {
8649 SCTP_STAT_INCR(sctps_lowlevelerr);
8650 asoc->ifp_had_enobuf = 1;
8652 if (from_where == 0) {
8653 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8655 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8657 if (*now_filled == 0) {
8658 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8660 *now = net->last_sent_time;
8662 net->last_sent_time = *now;
8666 if (error == EHOSTUNREACH) {
8668 * Destination went unreachable
8671 sctp_move_chunks_from_net(stcb, net);
8675 * I add this line to be paranoid. As far as
8676 * I can tell the continue, takes us back to
8677 * the top of the for, but just to make sure
8678 * I will reset these again here.
8680 ctl_cnt = bundle_at = 0;
8681 continue; /* This takes us back to the
8682 * for() for the nets. */
8684 asoc->ifp_had_enobuf = 0;
8689 if (bundle_at || hbflag) {
8690 /* For data/asconf and hb set time */
8691 if (*now_filled == 0) {
8692 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8694 *now = net->last_sent_time;
8696 net->last_sent_time = *now;
8700 *num_out += (ctl_cnt + bundle_at);
8703 /* setup for a RTO measurement */
8704 tsns_sent = data_list[0]->rec.data.TSN_seq;
8705 /* fill time if not already filled */
8706 if (*now_filled == 0) {
8707 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8709 *now = asoc->time_last_sent;
8711 asoc->time_last_sent = *now;
8713 if (net->rto_needed) {
8714 data_list[0]->do_rtt = 1;
8715 net->rto_needed = 0;
8717 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8718 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8724 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8725 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8728 if (old_start_at == NULL) {
8729 old_start_at = start_at;
8730 start_at = TAILQ_FIRST(&asoc->nets);
8732 goto again_one_more_time;
8735 * At the end there should be no NON timed chunks hanging on this
8738 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8739 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8741 if ((*num_out == 0) && (*reason_code == 0)) {
8746 sctp_clean_up_ctl(stcb, asoc, so_locked);
8751 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8754 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8755 * the control chunk queue.
8757 struct sctp_chunkhdr *hdr;
8758 struct sctp_tmit_chunk *chk;
8761 SCTP_TCB_LOCK_ASSERT(stcb);
8762 sctp_alloc_a_chunk(stcb, chk);
8765 sctp_m_freem(op_err);
8768 chk->copy_by_ref = 0;
8769 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT);
8770 if (op_err == NULL) {
8771 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8776 while (mat != NULL) {
8777 chk->send_size += SCTP_BUF_LEN(mat);
8778 mat = SCTP_BUF_NEXT(mat);
8780 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8781 chk->rec.chunk_id.can_take_data = 1;
8782 chk->sent = SCTP_DATAGRAM_UNSENT;
8785 chk->asoc = &stcb->asoc;
8788 hdr = mtod(op_err, struct sctp_chunkhdr *);
8789 hdr->chunk_type = SCTP_OPERATION_ERROR;
8790 hdr->chunk_flags = 0;
8791 hdr->chunk_length = htons(chk->send_size);
8792 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8795 chk->asoc->ctrl_queue_cnt++;
8799 sctp_send_cookie_echo(struct mbuf *m,
8801 struct sctp_tcb *stcb,
8802 struct sctp_nets *net)
8805 * pull out the cookie and put it at the front of the control chunk
8809 struct mbuf *cookie;
8810 struct sctp_paramhdr parm, *phdr;
8811 struct sctp_chunkhdr *hdr;
8812 struct sctp_tmit_chunk *chk;
8813 uint16_t ptype, plen;
8815 /* First find the cookie in the param area */
8817 at = offset + sizeof(struct sctp_init_chunk);
8819 SCTP_TCB_LOCK_ASSERT(stcb);
8821 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8825 ptype = ntohs(phdr->param_type);
8826 plen = ntohs(phdr->param_length);
8827 if (ptype == SCTP_STATE_COOKIE) {
8830 /* found the cookie */
8831 if ((pad = (plen % 4))) {
8834 cookie = SCTP_M_COPYM(m, at, plen, M_DONTWAIT);
8835 if (cookie == NULL) {
8839 #ifdef SCTP_MBUF_LOGGING
8840 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8843 for (mat = cookie; mat; mat = SCTP_BUF_NEXT(mat)) {
8844 if (SCTP_BUF_IS_EXTENDED(mat)) {
8845 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8852 at += SCTP_SIZE32(plen);
8854 if (cookie == NULL) {
8855 /* Did not find the cookie */
8858 /* ok, we got the cookie lets change it into a cookie echo chunk */
8860 /* first the change from param to cookie */
8861 hdr = mtod(cookie, struct sctp_chunkhdr *);
8862 hdr->chunk_type = SCTP_COOKIE_ECHO;
8863 hdr->chunk_flags = 0;
8864 /* get the chunk stuff now and place it in the FRONT of the queue */
8865 sctp_alloc_a_chunk(stcb, chk);
8868 sctp_m_freem(cookie);
8871 chk->copy_by_ref = 0;
8872 chk->send_size = plen;
8873 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8874 chk->rec.chunk_id.can_take_data = 0;
8875 chk->sent = SCTP_DATAGRAM_UNSENT;
8877 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8878 chk->asoc = &stcb->asoc;
8881 atomic_add_int(&chk->whoTo->ref_count, 1);
8882 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8883 chk->asoc->ctrl_queue_cnt++;
8888 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
8892 struct sctp_nets *net)
8895 * take a HB request and make it into a HB ack and send it.
8897 struct mbuf *outchain;
8898 struct sctp_chunkhdr *chdr;
8899 struct sctp_tmit_chunk *chk;
8903 /* must have a net pointer */
8906 outchain = SCTP_M_COPYM(m, offset, chk_length, M_DONTWAIT);
8907 if (outchain == NULL) {
8908 /* gak out of memory */
8911 #ifdef SCTP_MBUF_LOGGING
8912 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8915 for (mat = outchain; mat; mat = SCTP_BUF_NEXT(mat)) {
8916 if (SCTP_BUF_IS_EXTENDED(mat)) {
8917 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8922 chdr = mtod(outchain, struct sctp_chunkhdr *);
8923 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
8924 chdr->chunk_flags = 0;
8925 if (chk_length % 4) {
8927 uint32_t cpthis = 0;
8930 padlen = 4 - (chk_length % 4);
8931 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
8933 sctp_alloc_a_chunk(stcb, chk);
8936 sctp_m_freem(outchain);
8939 chk->copy_by_ref = 0;
8940 chk->send_size = chk_length;
8941 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
8942 chk->rec.chunk_id.can_take_data = 1;
8943 chk->sent = SCTP_DATAGRAM_UNSENT;
8946 chk->asoc = &stcb->asoc;
8947 chk->data = outchain;
8949 atomic_add_int(&chk->whoTo->ref_count, 1);
8950 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8951 chk->asoc->ctrl_queue_cnt++;
8955 sctp_send_cookie_ack(struct sctp_tcb *stcb)
8957 /* formulate and queue a cookie-ack back to sender */
8958 struct mbuf *cookie_ack;
8959 struct sctp_chunkhdr *hdr;
8960 struct sctp_tmit_chunk *chk;
8962 SCTP_TCB_LOCK_ASSERT(stcb);
8964 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
8965 if (cookie_ack == NULL) {
8969 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
8970 sctp_alloc_a_chunk(stcb, chk);
8973 sctp_m_freem(cookie_ack);
8976 chk->copy_by_ref = 0;
8977 chk->send_size = sizeof(struct sctp_chunkhdr);
8978 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
8979 chk->rec.chunk_id.can_take_data = 1;
8980 chk->sent = SCTP_DATAGRAM_UNSENT;
8983 chk->asoc = &stcb->asoc;
8984 chk->data = cookie_ack;
8985 if (chk->asoc->last_control_chunk_from != NULL) {
8986 chk->whoTo = chk->asoc->last_control_chunk_from;
8987 atomic_add_int(&chk->whoTo->ref_count, 1);
8991 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
8992 hdr->chunk_type = SCTP_COOKIE_ACK;
8993 hdr->chunk_flags = 0;
8994 hdr->chunk_length = htons(chk->send_size);
8995 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
8996 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8997 chk->asoc->ctrl_queue_cnt++;
9003 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9005 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9006 struct mbuf *m_shutdown_ack;
9007 struct sctp_shutdown_ack_chunk *ack_cp;
9008 struct sctp_tmit_chunk *chk;
9010 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9011 if (m_shutdown_ack == NULL) {
9015 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9016 sctp_alloc_a_chunk(stcb, chk);
9019 sctp_m_freem(m_shutdown_ack);
9022 chk->copy_by_ref = 0;
9023 chk->send_size = sizeof(struct sctp_chunkhdr);
9024 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9025 chk->rec.chunk_id.can_take_data = 1;
9026 chk->sent = SCTP_DATAGRAM_UNSENT;
9029 chk->asoc = &stcb->asoc;
9030 chk->data = m_shutdown_ack;
9033 atomic_add_int(&chk->whoTo->ref_count, 1);
9035 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9036 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9037 ack_cp->ch.chunk_flags = 0;
9038 ack_cp->ch.chunk_length = htons(chk->send_size);
9039 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9040 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9041 chk->asoc->ctrl_queue_cnt++;
9046 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9048 /* formulate and queue a SHUTDOWN to the sender */
9049 struct mbuf *m_shutdown;
9050 struct sctp_shutdown_chunk *shutdown_cp;
9051 struct sctp_tmit_chunk *chk;
9053 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9054 if (m_shutdown == NULL) {
9058 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9059 sctp_alloc_a_chunk(stcb, chk);
9062 sctp_m_freem(m_shutdown);
9065 chk->copy_by_ref = 0;
9066 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9067 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9068 chk->rec.chunk_id.can_take_data = 1;
9069 chk->sent = SCTP_DATAGRAM_UNSENT;
9072 chk->asoc = &stcb->asoc;
9073 chk->data = m_shutdown;
9076 atomic_add_int(&chk->whoTo->ref_count, 1);
9078 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9079 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9080 shutdown_cp->ch.chunk_flags = 0;
9081 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9082 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9083 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9084 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9085 chk->asoc->ctrl_queue_cnt++;
9090 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9093 * formulate and queue an ASCONF to the peer. ASCONF parameters
9094 * should be queued on the assoc queue.
9096 struct sctp_tmit_chunk *chk;
9097 struct mbuf *m_asconf;
9100 SCTP_TCB_LOCK_ASSERT(stcb);
9102 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9103 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9104 /* can't send a new one if there is one in flight already */
9107 /* compose an ASCONF chunk, maximum length is PMTU */
9108 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9109 if (m_asconf == NULL) {
9112 sctp_alloc_a_chunk(stcb, chk);
9115 sctp_m_freem(m_asconf);
9118 chk->copy_by_ref = 0;
9119 chk->data = m_asconf;
9120 chk->send_size = len;
9121 chk->rec.chunk_id.id = SCTP_ASCONF;
9122 chk->rec.chunk_id.can_take_data = 0;
9123 chk->sent = SCTP_DATAGRAM_UNSENT;
9125 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9126 chk->asoc = &stcb->asoc;
9129 atomic_add_int(&chk->whoTo->ref_count, 1);
9131 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9132 chk->asoc->ctrl_queue_cnt++;
9137 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9140 * formulate and queue a asconf-ack back to sender. the asconf-ack
9141 * must be stored in the tcb.
9143 struct sctp_tmit_chunk *chk;
9144 struct sctp_asconf_ack *ack, *latest_ack;
9146 struct sctp_nets *net = NULL;
9148 SCTP_TCB_LOCK_ASSERT(stcb);
9149 /* Get the latest ASCONF-ACK */
9150 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9151 if (latest_ack == NULL) {
9154 if (latest_ack->last_sent_to != NULL &&
9155 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9156 /* we're doing a retransmission */
9157 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9160 if (stcb->asoc.last_control_chunk_from == NULL) {
9161 if (stcb->asoc.alternate) {
9162 net = stcb->asoc.alternate;
9164 net = stcb->asoc.primary_destination;
9167 net = stcb->asoc.last_control_chunk_from;
9172 if (stcb->asoc.last_control_chunk_from == NULL) {
9173 if (stcb->asoc.alternate) {
9174 net = stcb->asoc.alternate;
9176 net = stcb->asoc.primary_destination;
9179 net = stcb->asoc.last_control_chunk_from;
9182 latest_ack->last_sent_to = net;
9184 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9185 if (ack->data == NULL) {
9188 /* copy the asconf_ack */
9189 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_DONTWAIT);
9190 if (m_ack == NULL) {
9191 /* couldn't copy it */
9194 #ifdef SCTP_MBUF_LOGGING
9195 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9198 for (mat = m_ack; mat; mat = SCTP_BUF_NEXT(mat)) {
9199 if (SCTP_BUF_IS_EXTENDED(mat)) {
9200 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9206 sctp_alloc_a_chunk(stcb, chk);
9210 sctp_m_freem(m_ack);
9213 chk->copy_by_ref = 0;
9217 atomic_add_int(&chk->whoTo->ref_count, 1);
9222 chk->send_size = ack->len;
9223 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9224 chk->rec.chunk_id.can_take_data = 1;
9225 chk->sent = SCTP_DATAGRAM_UNSENT;
9227 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */
9228 chk->asoc = &stcb->asoc;
9230 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9231 chk->asoc->ctrl_queue_cnt++;
9238 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9239 struct sctp_tcb *stcb,
9240 struct sctp_association *asoc,
9241 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9242 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9248 * send out one MTU of retransmission. If fast_retransmit is
9249 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9250 * rwnd. For a Cookie or Asconf in the control chunk queue we
9251 * retransmit them by themselves.
9253 * For data chunks we will pick out the lowest TSN's in the sent_queue
9254 * marked for resend and bundle them all together (up to a MTU of
9255 * destination). The address to send to should have been
9256 * selected/changed where the retransmission was marked (i.e. in FR
9257 * or t3-timeout routines).
9259 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9260 struct sctp_tmit_chunk *chk, *fwd;
9261 struct mbuf *m, *endofchain;
9262 struct sctp_nets *net = NULL;
9263 uint32_t tsns_sent = 0;
9264 int no_fragmentflg, bundle_at, cnt_thru;
9266 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9267 struct sctp_auth_chunk *auth = NULL;
9268 uint32_t auth_offset = 0;
9269 uint16_t auth_keyid;
9270 int override_ok = 1;
9271 int data_auth_reqd = 0;
9274 SCTP_TCB_LOCK_ASSERT(stcb);
9275 tmr_started = ctl_cnt = bundle_at = error = 0;
9280 endofchain = m = NULL;
9281 auth_keyid = stcb->asoc.authinfo.active_keyid;
9282 #ifdef SCTP_AUDITING_ENABLED
9283 sctp_audit_log(0xC3, 1);
9285 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9286 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9287 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9288 asoc->sent_queue_retran_cnt);
9289 asoc->sent_queue_cnt = 0;
9290 asoc->sent_queue_cnt_removeable = 0;
9291 /* send back 0/0 so we enter normal transmission */
9295 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9296 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9297 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9298 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9299 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9302 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9303 if (chk != asoc->str_reset) {
9305 * not eligible for retran if its
9312 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9316 * Add an AUTH chunk, if chunk requires it save the
9317 * offset into the chain for AUTH
9319 if ((auth == NULL) &&
9320 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9321 stcb->asoc.peer_auth_chunks))) {
9322 m = sctp_add_auth_chunk(m, &endofchain,
9323 &auth, &auth_offset,
9325 chk->rec.chunk_id.id);
9326 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9328 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9334 /* do we have control chunks to retransmit? */
9336 /* Start a timer no matter if we suceed or fail */
9337 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9338 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9339 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9340 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9341 chk->snd_count++; /* update our count */
9342 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9343 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9344 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9345 no_fragmentflg, 0, 0,
9346 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9347 chk->whoTo->port, NULL,
9350 SCTP_STAT_INCR(sctps_lowlevelerr);
9357 * We don't want to mark the net->sent time here since this
9358 * we use this for HB and retrans cannot measure RTT
9360 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9362 chk->sent = SCTP_DATAGRAM_SENT;
9363 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9367 /* Clean up the fwd-tsn list */
9368 sctp_clean_up_ctl(stcb, asoc, so_locked);
9373 * Ok, it is just data retransmission we need to do or that and a
9374 * fwd-tsn with it all.
9376 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9377 return (SCTP_RETRAN_DONE);
9379 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9380 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9381 /* not yet open, resend the cookie and that is it */
9384 #ifdef SCTP_AUDITING_ENABLED
9385 sctp_auditing(20, inp, stcb, NULL);
9387 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9388 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9389 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9390 /* No, not sent to this net or not ready for rtx */
9393 if (chk->data == NULL) {
9394 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9395 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9398 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9399 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9400 /* Gak, we have exceeded max unlucky retran, abort! */
9401 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9403 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9404 atomic_add_int(&stcb->asoc.refcnt, 1);
9405 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked);
9406 SCTP_TCB_LOCK(stcb);
9407 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9408 return (SCTP_RETRAN_EXIT);
9410 /* pick up the net */
9412 switch (net->ro._l_addr.sa.sa_family) {
9415 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9420 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9429 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9430 /* No room in peers rwnd */
9433 tsn = asoc->last_acked_seq + 1;
9434 if (tsn == chk->rec.data.TSN_seq) {
9436 * we make a special exception for this
9437 * case. The peer has no rwnd but is missing
9438 * the lowest chunk.. which is probably what
9439 * is holding up the rwnd.
9441 goto one_chunk_around;
9446 if (asoc->peers_rwnd < mtu) {
9448 if ((asoc->peers_rwnd == 0) &&
9449 (asoc->total_flight == 0)) {
9450 chk->window_probe = 1;
9451 chk->whoTo->window_probe = 1;
9454 #ifdef SCTP_AUDITING_ENABLED
9455 sctp_audit_log(0xC3, 2);
9459 net->fast_retran_ip = 0;
9460 if (chk->rec.data.doing_fast_retransmit == 0) {
9462 * if no FR in progress skip destination that have
9463 * flight_size > cwnd.
9465 if (net->flight_size >= net->cwnd) {
9470 * Mark the destination net to have FR recovery
9474 net->fast_retran_ip = 1;
9478 * if no AUTH is yet included and this chunk requires it,
9479 * make sure to account for it. We don't apply the size
9480 * until the AUTH chunk is actually added below in case
9481 * there is no room for this chunk.
9483 if (data_auth_reqd && (auth == NULL)) {
9484 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9488 if ((chk->send_size <= (mtu - dmtu)) ||
9489 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9490 /* ok we will add this one */
9491 if (data_auth_reqd) {
9493 m = sctp_add_auth_chunk(m,
9499 auth_keyid = chk->auth_keyid;
9501 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9502 } else if (override_ok) {
9503 auth_keyid = chk->auth_keyid;
9505 } else if (chk->auth_keyid != auth_keyid) {
9506 /* different keyid, so done bundling */
9510 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9512 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9515 /* Do clear IP_DF ? */
9516 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9519 /* upate our MTU size */
9520 if (mtu > (chk->send_size + dmtu))
9521 mtu -= (chk->send_size + dmtu);
9524 data_list[bundle_at++] = chk;
9525 if (one_chunk && (asoc->total_flight <= 0)) {
9526 SCTP_STAT_INCR(sctps_windowprobed);
9529 if (one_chunk == 0) {
9531 * now are there anymore forward from chk to pick
9534 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9535 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9536 /* Nope, not for retran */
9539 if (fwd->whoTo != net) {
9540 /* Nope, not the net in question */
9543 if (data_auth_reqd && (auth == NULL)) {
9544 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9547 if (fwd->send_size <= (mtu - dmtu)) {
9548 if (data_auth_reqd) {
9550 m = sctp_add_auth_chunk(m,
9556 auth_keyid = fwd->auth_keyid;
9558 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9559 } else if (override_ok) {
9560 auth_keyid = fwd->auth_keyid;
9562 } else if (fwd->auth_keyid != auth_keyid) {
9570 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9572 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9575 /* Do clear IP_DF ? */
9576 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9579 /* upate our MTU size */
9580 if (mtu > (fwd->send_size + dmtu))
9581 mtu -= (fwd->send_size + dmtu);
9584 data_list[bundle_at++] = fwd;
9585 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9589 /* can't fit so we are done */
9594 /* Is there something to send for this destination? */
9597 * No matter if we fail/or suceed we should start a
9598 * timer. A failure is like a lost IP packet :-)
9600 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9602 * no timer running on this destination
9605 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9608 /* Now lets send it, if there is anything to send :> */
9609 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9610 (struct sockaddr *)&net->ro._l_addr, m,
9611 auth_offset, auth, auth_keyid,
9612 no_fragmentflg, 0, 0,
9613 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9617 /* error, we could not output */
9618 SCTP_STAT_INCR(sctps_lowlevelerr);
9626 * We don't want to mark the net->sent time here
9627 * since this we use this for HB and retrans cannot
9630 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9632 /* For auto-close */
9634 if (*now_filled == 0) {
9635 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9636 *now = asoc->time_last_sent;
9639 asoc->time_last_sent = *now;
9641 *cnt_out += bundle_at;
9642 #ifdef SCTP_AUDITING_ENABLED
9643 sctp_audit_log(0xC4, bundle_at);
9646 tsns_sent = data_list[0]->rec.data.TSN_seq;
9648 for (i = 0; i < bundle_at; i++) {
9649 SCTP_STAT_INCR(sctps_sendretransdata);
9650 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9652 * When we have a revoked data, and we
9653 * retransmit it, then we clear the revoked
9654 * flag since this flag dictates if we
9655 * subtracted from the fs
9657 if (data_list[i]->rec.data.chunk_was_revoked) {
9658 /* Deflate the cwnd */
9659 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9660 data_list[i]->rec.data.chunk_was_revoked = 0;
9662 data_list[i]->snd_count++;
9663 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9664 /* record the time */
9665 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9666 if (data_list[i]->book_size_scale) {
9668 * need to double the book size on
9671 data_list[i]->book_size_scale = 0;
9673 * Since we double the booksize, we
9674 * must also double the output queue
9675 * size, since this get shrunk when
9676 * we free by this amount.
9678 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9679 data_list[i]->book_size *= 2;
9683 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9684 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9685 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9687 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9688 (uint32_t) (data_list[i]->send_size +
9689 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9691 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9692 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9693 data_list[i]->whoTo->flight_size,
9694 data_list[i]->book_size,
9695 (uintptr_t) data_list[i]->whoTo,
9696 data_list[i]->rec.data.TSN_seq);
9698 sctp_flight_size_increase(data_list[i]);
9699 sctp_total_flight_increase(stcb, data_list[i]);
9700 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9701 /* SWS sender side engages */
9702 asoc->peers_rwnd = 0;
9705 (data_list[i]->rec.data.doing_fast_retransmit)) {
9706 SCTP_STAT_INCR(sctps_sendfastretrans);
9707 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9708 (tmr_started == 0)) {
9710 * ok we just fast-retrans'd
9711 * the lowest TSN, i.e the
9712 * first on the list. In
9713 * this case we want to give
9714 * some more time to get a
9715 * SACK back without a
9718 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9719 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
9720 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9724 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9725 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9727 #ifdef SCTP_AUDITING_ENABLED
9728 sctp_auditing(21, inp, stcb, NULL);
9734 if (asoc->sent_queue_retran_cnt <= 0) {
9735 /* all done we have no more to retran */
9736 asoc->sent_queue_retran_cnt = 0;
9740 /* No more room in rwnd */
9743 /* stop the for loop here. we sent out a packet */
9750 sctp_timer_validation(struct sctp_inpcb *inp,
9751 struct sctp_tcb *stcb,
9752 struct sctp_association *asoc)
9754 struct sctp_nets *net;
9756 /* Validate that a timer is running somewhere */
9757 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9758 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9759 /* Here is a timer */
9763 SCTP_TCB_LOCK_ASSERT(stcb);
9764 /* Gak, we did not have a timer somewhere */
9765 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9766 if (asoc->alternate) {
9767 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9769 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9775 sctp_chunk_output(struct sctp_inpcb *inp,
9776 struct sctp_tcb *stcb,
9779 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9785 * Ok this is the generic chunk service queue. we must do the
9787 * - See if there are retransmits pending, if so we must
9789 * - Service the stream queue that is next, moving any
9790 * message (note I must get a complete message i.e.
9791 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9793 * - Check to see if the cwnd/rwnd allows any output, if so we
9794 * go ahead and fomulate and send the low level chunks. Making sure
9795 * to combine any control in the control chunk queue also.
9797 struct sctp_association *asoc;
9798 struct sctp_nets *net;
9799 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0;
9800 unsigned int burst_cnt = 0;
9804 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9807 unsigned int tot_frs = 0;
9810 /* The Nagle algorithm is only applied when handling a send call. */
9811 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9812 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9820 SCTP_TCB_LOCK_ASSERT(stcb);
9822 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9824 if ((un_sent <= 0) &&
9825 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9826 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9827 (asoc->sent_queue_retran_cnt == 0)) {
9828 /* Nothing to do unless there is something to be sent left */
9832 * Do we have something to send, data or control AND a sack timer
9833 * running, if so piggy-back the sack.
9835 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9836 sctp_send_sack(stcb, so_locked);
9837 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9839 while (asoc->sent_queue_retran_cnt) {
9841 * Ok, it is retransmission time only, we send out only ONE
9842 * packet with a single call off to the retran code.
9844 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9846 * Special hook for handling cookiess discarded
9847 * by peer that carried data. Send cookie-ack only
9848 * and then the next call with get the retran's.
9850 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9852 &now, &now_filled, frag_point, so_locked);
9854 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9855 /* if its not from a HB then do it */
9857 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9863 * its from any other place, we don't allow retran
9864 * output (only control)
9869 /* Can't send anymore */
9871 * now lets push out control by calling med-level
9872 * output once. this assures that we WILL send HB's
9875 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9877 &now, &now_filled, frag_point, so_locked);
9878 #ifdef SCTP_AUDITING_ENABLED
9879 sctp_auditing(8, inp, stcb, NULL);
9881 sctp_timer_validation(inp, stcb, asoc);
9886 * The count was off.. retran is not happening so do
9887 * the normal retransmission.
9889 #ifdef SCTP_AUDITING_ENABLED
9890 sctp_auditing(9, inp, stcb, NULL);
9892 if (ret == SCTP_RETRAN_EXIT) {
9897 if (from_where == SCTP_OUTPUT_FROM_T3) {
9898 /* Only one transmission allowed out of a timeout */
9899 #ifdef SCTP_AUDITING_ENABLED
9900 sctp_auditing(10, inp, stcb, NULL);
9902 /* Push out any control */
9903 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
9904 &now, &now_filled, frag_point, so_locked);
9907 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
9908 /* Hit FR burst limit */
9911 if ((num_out == 0) && (ret == 0)) {
9912 /* No more retrans to send */
9916 #ifdef SCTP_AUDITING_ENABLED
9917 sctp_auditing(12, inp, stcb, NULL);
9919 /* Check for bad destinations, if they exist move chunks around. */
9920 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9921 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
9923 * if possible move things off of this address we
9924 * still may send below due to the dormant state but
9925 * we try to find an alternate address to send to
9926 * and if we have one we move all queued data on the
9927 * out wheel to this alternate address.
9929 if (net->ref_count > 1)
9930 sctp_move_chunks_from_net(stcb, net);
9933 * if ((asoc->sat_network) || (net->addr_is_local))
9934 * { burst_limit = asoc->max_burst *
9935 * SCTP_SAT_NETWORK_BURST_INCR; }
9937 if (asoc->max_burst > 0) {
9938 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
9939 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
9941 * JRS - Use the congestion
9942 * control given in the
9943 * congestion control module
9945 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
9946 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
9947 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
9949 SCTP_STAT_INCR(sctps_maxburstqueued);
9951 net->fast_retran_ip = 0;
9953 if (net->flight_size == 0) {
9955 * Should be decaying the
9967 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
9968 &reason_code, 0, from_where,
9969 &now, &now_filled, frag_point, so_locked);
9971 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
9972 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
9973 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
9975 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9976 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
9977 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
9981 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
9985 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9986 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
9988 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
9993 * When the Nagle algorithm is used, look at how
9994 * much is unsent, then if its smaller than an MTU
9995 * and we have data in flight we stop, except if we
9996 * are handling a fragmented user message.
9998 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
9999 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10000 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10001 (stcb->asoc.total_flight > 0) &&
10002 ((stcb->asoc.locked_on_sending == NULL) ||
10003 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10007 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10008 TAILQ_EMPTY(&asoc->send_queue) &&
10009 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10010 /* Nothing left to send */
10013 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10014 /* Nothing left to send */
10017 } while (num_out &&
10018 ((asoc->max_burst == 0) ||
10019 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10020 (burst_cnt < asoc->max_burst)));
10022 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10023 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10024 SCTP_STAT_INCR(sctps_maxburstqueued);
10025 asoc->burst_limit_applied = 1;
10026 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10027 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10030 asoc->burst_limit_applied = 0;
10033 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10034 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10036 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10040 * Now we need to clean up the control chunk chain if a ECNE is on
10041 * it. It must be marked as UNSENT again so next call will continue
10042 * to send it until such time that we get a CWR, to remove it.
10044 if (stcb->asoc.ecn_echo_cnt_onq)
10045 sctp_fix_ecn_echo(asoc);
10052 struct sctp_inpcb *inp,
10054 struct sockaddr *addr,
10055 struct mbuf *control,
10060 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10063 if (inp->sctp_socket == NULL) {
10064 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10067 return (sctp_sosend(inp->sctp_socket,
10069 (struct uio *)NULL,
10077 send_forward_tsn(struct sctp_tcb *stcb,
10078 struct sctp_association *asoc)
10080 struct sctp_tmit_chunk *chk;
10081 struct sctp_forward_tsn_chunk *fwdtsn;
10082 uint32_t advance_peer_ack_point;
10084 SCTP_TCB_LOCK_ASSERT(stcb);
10085 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10086 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10087 /* mark it to unsent */
10088 chk->sent = SCTP_DATAGRAM_UNSENT;
10089 chk->snd_count = 0;
10090 /* Do we correct its output location? */
10092 sctp_free_remote_addr(chk->whoTo);
10095 goto sctp_fill_in_rest;
10098 /* Ok if we reach here we must build one */
10099 sctp_alloc_a_chunk(stcb, chk);
10103 asoc->fwd_tsn_cnt++;
10104 chk->copy_by_ref = 0;
10105 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10106 chk->rec.chunk_id.can_take_data = 0;
10109 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
10110 if (chk->data == NULL) {
10111 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10114 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10115 chk->sent = SCTP_DATAGRAM_UNSENT;
10116 chk->snd_count = 0;
10117 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10118 asoc->ctrl_queue_cnt++;
10121 * Here we go through and fill out the part that deals with
10122 * stream/seq of the ones we skip.
10124 SCTP_BUF_LEN(chk->data) = 0;
10126 struct sctp_tmit_chunk *at, *tp1, *last;
10127 struct sctp_strseq *strseq;
10128 unsigned int cnt_of_space, i, ovh;
10129 unsigned int space_needed;
10130 unsigned int cnt_of_skipped = 0;
10132 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10133 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10134 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10135 /* no more to look at */
10138 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10139 /* We don't report these */
10144 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10145 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10147 cnt_of_space = M_TRAILINGSPACE(chk->data);
10149 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10150 ovh = SCTP_MIN_OVERHEAD;
10152 ovh = SCTP_MIN_V4_OVERHEAD;
10154 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10155 /* trim to a mtu size */
10156 cnt_of_space = asoc->smallest_mtu - ovh;
10158 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10159 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10160 0xff, 0, cnt_of_skipped,
10161 asoc->advanced_peer_ack_point);
10164 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10165 if (cnt_of_space < space_needed) {
10167 * ok we must trim down the chunk by lowering the
10168 * advance peer ack point.
10170 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10171 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10172 0xff, 0xff, cnt_of_space,
10175 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10176 cnt_of_skipped /= sizeof(struct sctp_strseq);
10178 * Go through and find the TSN that will be the one
10181 at = TAILQ_FIRST(&asoc->sent_queue);
10183 for (i = 0; i < cnt_of_skipped; i++) {
10184 tp1 = TAILQ_NEXT(at, sctp_next);
10191 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10192 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10193 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10194 asoc->advanced_peer_ack_point);
10198 * last now points to last one I can report, update
10202 advance_peer_ack_point = last->rec.data.TSN_seq;
10203 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10204 cnt_of_skipped * sizeof(struct sctp_strseq);
10206 chk->send_size = space_needed;
10207 /* Setup the chunk */
10208 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10209 fwdtsn->ch.chunk_length = htons(chk->send_size);
10210 fwdtsn->ch.chunk_flags = 0;
10211 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10212 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10213 SCTP_BUF_LEN(chk->data) = chk->send_size;
10216 * Move pointer to after the fwdtsn and transfer to the
10219 strseq = (struct sctp_strseq *)fwdtsn;
10221 * Now populate the strseq list. This is done blindly
10222 * without pulling out duplicate stream info. This is
10223 * inefficent but won't harm the process since the peer will
10224 * look at these in sequence and will thus release anything.
10225 * It could mean we exceed the PMTU and chop off some that
10226 * we could have included.. but this is unlikely (aka 1432/4
10227 * would mean 300+ stream seq's would have to be reported in
10228 * one FWD-TSN. With a bit of work we can later FIX this to
10229 * optimize and pull out duplcates.. but it does add more
10230 * overhead. So for now... not!
10232 at = TAILQ_FIRST(&asoc->sent_queue);
10233 for (i = 0; i < cnt_of_skipped; i++) {
10234 tp1 = TAILQ_NEXT(at, sctp_next);
10237 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10238 /* We don't report these */
10243 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10244 at->rec.data.fwd_tsn_cnt = 0;
10246 strseq->stream = ntohs(at->rec.data.stream_number);
10247 strseq->sequence = ntohs(at->rec.data.stream_seq);
10256 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10257 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10263 * Queue up a SACK or NR-SACK in the control queue.
10264 * We must first check to see if a SACK or NR-SACK is
10265 * somehow on the control queue.
10266 * If so, we will take and and remove the old one.
10268 struct sctp_association *asoc;
10269 struct sctp_tmit_chunk *chk, *a_chk;
10270 struct sctp_sack_chunk *sack;
10271 struct sctp_nr_sack_chunk *nr_sack;
10272 struct sctp_gap_ack_block *gap_descriptor;
10273 struct sack_track *selector;
10278 int limit_reached = 0;
10279 unsigned int i, siz, j;
10280 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10283 uint32_t highest_tsn;
10288 if ((stcb->asoc.sctp_nr_sack_on_off == 1) &&
10289 (stcb->asoc.peer_supports_nr_sack == 1)) {
10290 type = SCTP_NR_SELECTIVE_ACK;
10292 type = SCTP_SELECTIVE_ACK;
10295 asoc = &stcb->asoc;
10296 SCTP_TCB_LOCK_ASSERT(stcb);
10297 if (asoc->last_data_chunk_from == NULL) {
10298 /* Hmm we never received anything */
10301 sctp_slide_mapping_arrays(stcb);
10302 sctp_set_rwnd(stcb, asoc);
10303 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10304 if (chk->rec.chunk_id.id == type) {
10305 /* Hmm, found a sack already on queue, remove it */
10306 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10307 asoc->ctrl_queue_cnt--;
10310 sctp_m_freem(a_chk->data);
10311 a_chk->data = NULL;
10313 if (a_chk->whoTo) {
10314 sctp_free_remote_addr(a_chk->whoTo);
10315 a_chk->whoTo = NULL;
10320 if (a_chk == NULL) {
10321 sctp_alloc_a_chunk(stcb, a_chk);
10322 if (a_chk == NULL) {
10323 /* No memory so we drop the idea, and set a timer */
10324 if (stcb->asoc.delayed_ack) {
10325 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10326 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10327 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10328 stcb->sctp_ep, stcb, NULL);
10330 stcb->asoc.send_sack = 1;
10334 a_chk->copy_by_ref = 0;
10335 a_chk->rec.chunk_id.id = type;
10336 a_chk->rec.chunk_id.can_take_data = 1;
10338 /* Clear our pkt counts */
10339 asoc->data_pkts_seen = 0;
10341 a_chk->asoc = asoc;
10342 a_chk->snd_count = 0;
10343 a_chk->send_size = 0; /* fill in later */
10344 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10345 a_chk->whoTo = NULL;
10347 if ((asoc->numduptsns) ||
10348 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) {
10350 * Ok, we have some duplicates or the destination for the
10351 * sack is unreachable, lets see if we can select an
10352 * alternate than asoc->last_data_chunk_from
10354 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) &&
10355 (asoc->used_alt_onsack > asoc->numnets)) {
10356 /* We used an alt last time, don't this time */
10357 a_chk->whoTo = NULL;
10359 asoc->used_alt_onsack++;
10360 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10362 if (a_chk->whoTo == NULL) {
10363 /* Nope, no alternate */
10364 a_chk->whoTo = asoc->last_data_chunk_from;
10365 asoc->used_alt_onsack = 0;
10369 * No duplicates so we use the last place we received data
10372 asoc->used_alt_onsack = 0;
10373 a_chk->whoTo = asoc->last_data_chunk_from;
10375 if (a_chk->whoTo) {
10376 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10378 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10379 highest_tsn = asoc->highest_tsn_inside_map;
10381 highest_tsn = asoc->highest_tsn_inside_nr_map;
10383 if (highest_tsn == asoc->cumulative_tsn) {
10385 if (type == SCTP_SELECTIVE_ACK) {
10386 space_req = sizeof(struct sctp_sack_chunk);
10388 space_req = sizeof(struct sctp_nr_sack_chunk);
10391 /* gaps get a cluster */
10392 space_req = MCLBYTES;
10394 /* Ok now lets formulate a MBUF with our sack */
10395 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_DONTWAIT, 1, MT_DATA);
10396 if ((a_chk->data == NULL) ||
10397 (a_chk->whoTo == NULL)) {
10398 /* rats, no mbuf memory */
10400 /* was a problem with the destination */
10401 sctp_m_freem(a_chk->data);
10402 a_chk->data = NULL;
10404 sctp_free_a_chunk(stcb, a_chk, so_locked);
10405 /* sa_ignore NO_NULL_CHK */
10406 if (stcb->asoc.delayed_ack) {
10407 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10408 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
10409 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10410 stcb->sctp_ep, stcb, NULL);
10412 stcb->asoc.send_sack = 1;
10416 /* ok, lets go through and fill it in */
10417 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10418 space = M_TRAILINGSPACE(a_chk->data);
10419 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10420 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10422 limit = mtod(a_chk->data, caddr_t);
10427 if ((asoc->sctp_cmt_on_off > 0) &&
10428 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10430 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10431 * received, then set high bit to 1, else 0. Reset
10434 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10435 asoc->cmt_dac_pkts_rcvd = 0;
10437 #ifdef SCTP_ASOCLOG_OF_TSNS
10438 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10439 stcb->asoc.cumack_log_atsnt++;
10440 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10441 stcb->asoc.cumack_log_atsnt = 0;
10444 /* reset the readers interpretation */
10445 stcb->freed_by_sorcv_sincelast = 0;
10447 if (type == SCTP_SELECTIVE_ACK) {
10448 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10450 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10451 if (highest_tsn > asoc->mapping_array_base_tsn) {
10452 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10454 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10458 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10459 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10460 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10461 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10463 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10467 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10470 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10472 if (((type == SCTP_SELECTIVE_ACK) &&
10473 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10474 ((type == SCTP_NR_SELECTIVE_ACK) &&
10475 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10476 /* we have a gap .. maybe */
10477 for (i = 0; i < siz; i++) {
10478 tsn_map = asoc->mapping_array[i];
10479 if (type == SCTP_SELECTIVE_ACK) {
10480 tsn_map |= asoc->nr_mapping_array[i];
10484 * Clear all bits corresponding to TSNs
10485 * smaller or equal to the cumulative TSN.
10487 tsn_map &= (~0 << (1 - offset));
10489 selector = &sack_array[tsn_map];
10490 if (mergeable && selector->right_edge) {
10492 * Backup, left and right edges were ok to
10498 if (selector->num_entries == 0)
10501 for (j = 0; j < selector->num_entries; j++) {
10502 if (mergeable && selector->right_edge) {
10504 * do a merge by NOT setting
10510 * no merge, set the left
10514 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10516 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10519 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10525 if (selector->left_edge) {
10529 if (limit_reached) {
10530 /* Reached the limit stop */
10536 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10537 (limit_reached == 0)) {
10541 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10542 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10544 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10547 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10550 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10552 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10553 /* we have a gap .. maybe */
10554 for (i = 0; i < siz; i++) {
10555 tsn_map = asoc->nr_mapping_array[i];
10558 * Clear all bits corresponding to
10559 * TSNs smaller or equal to the
10562 tsn_map &= (~0 << (1 - offset));
10564 selector = &sack_array[tsn_map];
10565 if (mergeable && selector->right_edge) {
10567 * Backup, left and right edges were
10570 num_nr_gap_blocks--;
10573 if (selector->num_entries == 0)
10576 for (j = 0; j < selector->num_entries; j++) {
10577 if (mergeable && selector->right_edge) {
10579 * do a merge by NOT
10586 * no merge, set the
10590 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10592 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10593 num_nr_gap_blocks++;
10595 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10601 if (selector->left_edge) {
10605 if (limit_reached) {
10606 /* Reached the limit stop */
10613 /* now we must add any dups we are going to report. */
10614 if ((limit_reached == 0) && (asoc->numduptsns)) {
10615 dup = (uint32_t *) gap_descriptor;
10616 for (i = 0; i < asoc->numduptsns; i++) {
10617 *dup = htonl(asoc->dup_tsns[i]);
10620 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10625 asoc->numduptsns = 0;
10628 * now that the chunk is prepared queue it to the control chunk
10631 if (type == SCTP_SELECTIVE_ACK) {
10632 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10633 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10634 num_dups * sizeof(int32_t);
10635 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10636 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10637 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10638 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10639 sack->sack.num_dup_tsns = htons(num_dups);
10640 sack->ch.chunk_type = type;
10641 sack->ch.chunk_flags = flags;
10642 sack->ch.chunk_length = htons(a_chk->send_size);
10644 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10645 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10646 num_dups * sizeof(int32_t);
10647 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10648 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10649 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10650 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10651 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10652 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10653 nr_sack->nr_sack.reserved = 0;
10654 nr_sack->ch.chunk_type = type;
10655 nr_sack->ch.chunk_flags = flags;
10656 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10658 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10659 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10660 asoc->ctrl_queue_cnt++;
10661 asoc->send_sack = 0;
10662 SCTP_STAT_INCR(sctps_sendsacks);
10667 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10668 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10673 struct mbuf *m_abort, *m, *m_last;
10674 struct mbuf *m_out, *m_end = NULL;
10675 struct sctp_abort_chunk *abort;
10676 struct sctp_auth_chunk *auth = NULL;
10677 struct sctp_nets *net;
10679 uint32_t auth_offset = 0;
10680 uint16_t cause_len, chunk_len, padding_len;
10682 SCTP_TCB_LOCK_ASSERT(stcb);
10684 * Add an AUTH chunk, if chunk requires it and save the offset into
10685 * the chain for AUTH
10687 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10688 stcb->asoc.peer_auth_chunks)) {
10689 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10690 stcb, SCTP_ABORT_ASSOCIATION);
10691 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10695 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
10696 if (m_abort == NULL) {
10698 sctp_m_freem(m_out);
10701 sctp_m_freem(operr);
10705 /* link in any error */
10706 SCTP_BUF_NEXT(m_abort) = operr;
10709 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10710 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10711 if (SCTP_BUF_NEXT(m) == NULL) {
10715 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10716 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10717 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10718 if (m_out == NULL) {
10719 /* NO Auth chunk prepended, so reserve space in front */
10720 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10723 /* Put AUTH chunk at the front of the chain */
10724 SCTP_BUF_NEXT(m_end) = m_abort;
10726 if (stcb->asoc.alternate) {
10727 net = stcb->asoc.alternate;
10729 net = stcb->asoc.primary_destination;
10731 /* Fill in the ABORT chunk header. */
10732 abort = mtod(m_abort, struct sctp_abort_chunk *);
10733 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10734 if (stcb->asoc.peer_vtag == 0) {
10735 /* This happens iff the assoc is in COOKIE-WAIT state. */
10736 vtag = stcb->asoc.my_vtag;
10737 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10739 vtag = stcb->asoc.peer_vtag;
10740 abort->ch.chunk_flags = 0;
10742 abort->ch.chunk_length = htons(chunk_len);
10743 /* Add padding, if necessary. */
10744 if (padding_len > 0) {
10745 if ((m_last == NULL) || sctp_add_pad_tombuf(m_last, padding_len)) {
10746 sctp_m_freem(m_out);
10750 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10751 (struct sockaddr *)&net->ro._l_addr,
10752 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10753 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10754 stcb->asoc.primary_destination->port, NULL,
10757 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10761 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10762 struct sctp_nets *net,
10765 /* formulate and SEND a SHUTDOWN-COMPLETE */
10766 struct mbuf *m_shutdown_comp;
10767 struct sctp_shutdown_complete_chunk *shutdown_complete;
10771 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
10772 if (m_shutdown_comp == NULL) {
10776 if (reflect_vtag) {
10777 flags = SCTP_HAD_NO_TCB;
10778 vtag = stcb->asoc.my_vtag;
10781 vtag = stcb->asoc.peer_vtag;
10783 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10784 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10785 shutdown_complete->ch.chunk_flags = flags;
10786 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10787 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10788 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10789 (struct sockaddr *)&net->ro._l_addr,
10790 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10791 stcb->sctp_ep->sctp_lport, stcb->rport,
10795 SCTP_SO_NOT_LOCKED);
10796 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10801 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10802 struct sctphdr *sh, uint32_t vtag,
10803 uint8_t type, struct mbuf *cause,
10804 uint8_t use_mflowid, uint32_t mflowid,
10805 uint32_t vrf_id, uint16_t port)
10807 struct mbuf *o_pak;
10809 struct sctphdr *shout;
10810 struct sctp_chunkhdr *ch;
10811 struct udphdr *udp;
10812 int len, cause_len, padding_len;
10814 #if defined(INET) || defined(INET6)
10819 struct sockaddr_in *src_sin, *dst_sin;
10824 struct sockaddr_in6 *src_sin6, *dst_sin6;
10825 struct ip6_hdr *ip6;
10829 /* Compute the length of the cause and add final padding. */
10831 if (cause != NULL) {
10832 struct mbuf *m_at, *m_last = NULL;
10834 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10835 if (SCTP_BUF_NEXT(m_at) == NULL)
10837 cause_len += SCTP_BUF_LEN(m_at);
10839 padding_len = cause_len % 4;
10840 if (padding_len != 0) {
10841 padding_len = 4 - padding_len;
10843 if (padding_len != 0) {
10844 if (sctp_add_pad_tombuf(m_last, padding_len)) {
10845 sctp_m_freem(cause);
10852 /* Get an mbuf for the header. */
10853 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
10854 switch (dst->sa_family) {
10857 len += sizeof(struct ip);
10862 len += sizeof(struct ip6_hdr);
10869 len += sizeof(struct udphdr);
10871 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
10872 if (mout == NULL) {
10874 sctp_m_freem(cause);
10878 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10879 SCTP_BUF_LEN(mout) = len;
10880 SCTP_BUF_NEXT(mout) = cause;
10881 if (use_mflowid != 0) {
10882 mout->m_pkthdr.flowid = mflowid;
10883 mout->m_flags |= M_FLOWID;
10891 switch (dst->sa_family) {
10894 src_sin = (struct sockaddr_in *)src;
10895 dst_sin = (struct sockaddr_in *)dst;
10896 ip = mtod(mout, struct ip *);
10897 ip->ip_v = IPVERSION;
10898 ip->ip_hl = (sizeof(struct ip) >> 2);
10900 ip->ip_id = ip_newid();
10902 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
10904 ip->ip_p = IPPROTO_UDP;
10906 ip->ip_p = IPPROTO_SCTP;
10908 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
10909 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
10911 len = sizeof(struct ip);
10912 shout = (struct sctphdr *)((caddr_t)ip + len);
10917 src_sin6 = (struct sockaddr_in6 *)src;
10918 dst_sin6 = (struct sockaddr_in6 *)dst;
10919 ip6 = mtod(mout, struct ip6_hdr *);
10920 ip6->ip6_flow = htonl(0x60000000);
10921 if (V_ip6_auto_flowlabel) {
10922 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
10924 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
10926 ip6->ip6_nxt = IPPROTO_UDP;
10928 ip6->ip6_nxt = IPPROTO_SCTP;
10930 ip6->ip6_src = dst_sin6->sin6_addr;
10931 ip6->ip6_dst = src_sin6->sin6_addr;
10932 len = sizeof(struct ip6_hdr);
10933 shout = (struct sctphdr *)((caddr_t)ip6 + len);
10938 shout = mtod(mout, struct sctphdr *);
10942 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
10943 sctp_m_freem(mout);
10946 udp = (struct udphdr *)shout;
10947 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
10948 udp->uh_dport = port;
10950 udp->uh_ulen = htons(sizeof(struct udphdr) +
10951 sizeof(struct sctphdr) +
10952 sizeof(struct sctp_chunkhdr) +
10953 cause_len + padding_len);
10954 len += sizeof(struct udphdr);
10955 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
10959 shout->src_port = sh->dest_port;
10960 shout->dest_port = sh->src_port;
10961 shout->checksum = 0;
10963 shout->v_tag = htonl(vtag);
10965 shout->v_tag = sh->v_tag;
10967 len += sizeof(struct sctphdr);
10968 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
10969 ch->chunk_type = type;
10971 ch->chunk_flags = 0;
10973 ch->chunk_flags = SCTP_HAD_NO_TCB;
10975 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
10976 len += sizeof(struct sctp_chunkhdr);
10977 len += cause_len + padding_len;
10979 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
10980 sctp_m_freem(mout);
10983 SCTP_ATTACH_CHAIN(o_pak, mout, len);
10984 switch (dst->sa_family) {
10989 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
10996 #if defined(SCTP_WITH_NO_CSUM)
10997 SCTP_STAT_INCR(sctps_sendnocrc);
10999 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11000 SCTP_STAT_INCR(sctps_sendswcrc);
11003 SCTP_ENABLE_UDP_CSUM(o_pak);
11006 #if defined(SCTP_WITH_NO_CSUM)
11007 SCTP_STAT_INCR(sctps_sendnocrc);
11009 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11010 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11011 SCTP_STAT_INCR(sctps_sendhwcrc);
11014 #ifdef SCTP_PACKET_LOGGING
11015 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11016 sctp_packet_log(o_pak);
11019 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11024 ip6->ip6_plen = len - sizeof(struct ip6_hdr);
11026 #if defined(SCTP_WITH_NO_CSUM)
11027 SCTP_STAT_INCR(sctps_sendnocrc);
11029 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11030 SCTP_STAT_INCR(sctps_sendswcrc);
11032 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11033 udp->uh_sum = 0xffff;
11036 #if defined(SCTP_WITH_NO_CSUM)
11037 SCTP_STAT_INCR(sctps_sendnocrc);
11039 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11040 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11041 SCTP_STAT_INCR(sctps_sendhwcrc);
11044 #ifdef SCTP_PACKET_LOGGING
11045 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11046 sctp_packet_log(o_pak);
11049 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11053 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11055 sctp_m_freem(mout);
11056 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11059 SCTP_STAT_INCR(sctps_sendpackets);
11060 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11061 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11066 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11067 struct sctphdr *sh,
11068 uint8_t use_mflowid, uint32_t mflowid,
11069 uint32_t vrf_id, uint16_t port)
11071 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11072 use_mflowid, mflowid,
11077 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11078 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11083 struct sctp_tmit_chunk *chk;
11084 struct sctp_heartbeat_chunk *hb;
11085 struct timeval now;
11087 SCTP_TCB_LOCK_ASSERT(stcb);
11091 (void)SCTP_GETTIME_TIMEVAL(&now);
11092 switch (net->ro._l_addr.sa.sa_family) {
11104 sctp_alloc_a_chunk(stcb, chk);
11106 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11109 chk->copy_by_ref = 0;
11110 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11111 chk->rec.chunk_id.can_take_data = 1;
11112 chk->asoc = &stcb->asoc;
11113 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11115 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11116 if (chk->data == NULL) {
11117 sctp_free_a_chunk(stcb, chk, so_locked);
11120 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11121 SCTP_BUF_LEN(chk->data) = chk->send_size;
11122 chk->sent = SCTP_DATAGRAM_UNSENT;
11123 chk->snd_count = 0;
11125 atomic_add_int(&chk->whoTo->ref_count, 1);
11126 /* Now we have a mbuf that we can fill in with the details */
11127 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11128 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11129 /* fill out chunk header */
11130 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11131 hb->ch.chunk_flags = 0;
11132 hb->ch.chunk_length = htons(chk->send_size);
11133 /* Fill out hb parameter */
11134 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11135 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11136 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11137 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11138 /* Did our user request this one, put it in */
11139 hb->heartbeat.hb_info.addr_family = net->ro._l_addr.sa.sa_family;
11140 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11141 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11143 * we only take from the entropy pool if the address is not
11146 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11147 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11149 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11150 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11152 switch (net->ro._l_addr.sa.sa_family) {
11155 memcpy(hb->heartbeat.hb_info.address,
11156 &net->ro._l_addr.sin.sin_addr,
11157 sizeof(net->ro._l_addr.sin.sin_addr));
11162 memcpy(hb->heartbeat.hb_info.address,
11163 &net->ro._l_addr.sin6.sin6_addr,
11164 sizeof(net->ro._l_addr.sin6.sin6_addr));
11171 net->hb_responded = 0;
11172 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11173 stcb->asoc.ctrl_queue_cnt++;
11174 SCTP_STAT_INCR(sctps_sendheartbeat);
11179 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11182 struct sctp_association *asoc;
11183 struct sctp_ecne_chunk *ecne;
11184 struct sctp_tmit_chunk *chk;
11189 asoc = &stcb->asoc;
11190 SCTP_TCB_LOCK_ASSERT(stcb);
11191 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11192 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11193 /* found a previous ECN_ECHO update it if needed */
11194 uint32_t cnt, ctsn;
11196 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11197 ctsn = ntohl(ecne->tsn);
11198 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11199 ecne->tsn = htonl(high_tsn);
11200 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11202 cnt = ntohl(ecne->num_pkts_since_cwr);
11204 ecne->num_pkts_since_cwr = htonl(cnt);
11208 /* nope could not find one to update so we must build one */
11209 sctp_alloc_a_chunk(stcb, chk);
11213 chk->copy_by_ref = 0;
11214 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11215 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11216 chk->rec.chunk_id.can_take_data = 0;
11217 chk->asoc = &stcb->asoc;
11218 chk->send_size = sizeof(struct sctp_ecne_chunk);
11219 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11220 if (chk->data == NULL) {
11221 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11224 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11225 SCTP_BUF_LEN(chk->data) = chk->send_size;
11226 chk->sent = SCTP_DATAGRAM_UNSENT;
11227 chk->snd_count = 0;
11229 atomic_add_int(&chk->whoTo->ref_count, 1);
11231 stcb->asoc.ecn_echo_cnt_onq++;
11232 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11233 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11234 ecne->ch.chunk_flags = 0;
11235 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11236 ecne->tsn = htonl(high_tsn);
11237 ecne->num_pkts_since_cwr = htonl(1);
11238 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11239 asoc->ctrl_queue_cnt++;
11243 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11244 struct mbuf *m, int len, int iphlen, int bad_crc)
11246 struct sctp_association *asoc;
11247 struct sctp_pktdrop_chunk *drp;
11248 struct sctp_tmit_chunk *chk;
11254 struct sctp_chunkhdr *ch, chunk_buf;
11255 unsigned int chk_length;
11260 asoc = &stcb->asoc;
11261 SCTP_TCB_LOCK_ASSERT(stcb);
11262 if (asoc->peer_supports_pktdrop == 0) {
11264 * peer must declare support before I send one.
11268 if (stcb->sctp_socket == NULL) {
11271 sctp_alloc_a_chunk(stcb, chk);
11275 chk->copy_by_ref = 0;
11277 chk->send_size = len;
11278 /* Validate that we do not have an ABORT in here. */
11279 offset = iphlen + sizeof(struct sctphdr);
11280 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11281 sizeof(*ch), (uint8_t *) & chunk_buf);
11282 while (ch != NULL) {
11283 chk_length = ntohs(ch->chunk_length);
11284 if (chk_length < sizeof(*ch)) {
11285 /* break to abort land */
11288 switch (ch->chunk_type) {
11289 case SCTP_PACKET_DROPPED:
11290 case SCTP_ABORT_ASSOCIATION:
11291 case SCTP_INITIATION_ACK:
11293 * We don't respond with an PKT-DROP to an ABORT
11294 * or PKT-DROP. We also do not respond to an
11295 * INIT-ACK, because we can't know if the initiation
11296 * tag is correct or not.
11298 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11303 offset += SCTP_SIZE32(chk_length);
11304 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11305 sizeof(*ch), (uint8_t *) & chunk_buf);
11308 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11309 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11311 * only send 1 mtu worth, trim off the excess on the end.
11314 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11317 chk->asoc = &stcb->asoc;
11318 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11319 if (chk->data == NULL) {
11321 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11324 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11325 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11327 sctp_m_freem(chk->data);
11331 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11332 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11333 chk->book_size_scale = 0;
11335 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11336 drp->trunc_len = htons(fullsz);
11338 * Len is already adjusted to size minus overhead above take
11339 * out the pkt_drop chunk itself from it.
11341 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11342 len = chk->send_size;
11344 /* no truncation needed */
11345 drp->ch.chunk_flags = 0;
11346 drp->trunc_len = htons(0);
11349 drp->ch.chunk_flags |= SCTP_BADCRC;
11351 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11352 SCTP_BUF_LEN(chk->data) = chk->send_size;
11353 chk->sent = SCTP_DATAGRAM_UNSENT;
11354 chk->snd_count = 0;
11356 /* we should hit here */
11358 atomic_add_int(&chk->whoTo->ref_count, 1);
11362 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11363 chk->rec.chunk_id.can_take_data = 1;
11364 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11365 drp->ch.chunk_length = htons(chk->send_size);
11366 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11370 drp->bottle_bw = htonl(spc);
11371 if (asoc->my_rwnd) {
11372 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11373 asoc->size_on_all_streams +
11374 asoc->my_rwnd_control_len +
11375 stcb->sctp_socket->so_rcv.sb_cc);
11378 * If my rwnd is 0, possibly from mbuf depletion as well as
11379 * space used, tell the peer there is NO space aka onq == bw
11381 drp->current_onq = htonl(spc);
11385 m_copydata(m, iphlen, len, (caddr_t)datap);
11386 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11387 asoc->ctrl_queue_cnt++;
11391 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11393 struct sctp_association *asoc;
11394 struct sctp_cwr_chunk *cwr;
11395 struct sctp_tmit_chunk *chk;
11397 SCTP_TCB_LOCK_ASSERT(stcb);
11401 asoc = &stcb->asoc;
11402 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11403 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11405 * found a previous CWR queued to same destination
11406 * update it if needed
11410 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11411 ctsn = ntohl(cwr->tsn);
11412 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11413 cwr->tsn = htonl(high_tsn);
11415 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11416 /* Make sure override is carried */
11417 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11422 sctp_alloc_a_chunk(stcb, chk);
11426 chk->copy_by_ref = 0;
11427 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11428 chk->rec.chunk_id.can_take_data = 1;
11429 chk->asoc = &stcb->asoc;
11430 chk->send_size = sizeof(struct sctp_cwr_chunk);
11431 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11432 if (chk->data == NULL) {
11433 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11436 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11437 SCTP_BUF_LEN(chk->data) = chk->send_size;
11438 chk->sent = SCTP_DATAGRAM_UNSENT;
11439 chk->snd_count = 0;
11441 atomic_add_int(&chk->whoTo->ref_count, 1);
11442 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11443 cwr->ch.chunk_type = SCTP_ECN_CWR;
11444 cwr->ch.chunk_flags = override;
11445 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11446 cwr->tsn = htonl(high_tsn);
11447 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11448 asoc->ctrl_queue_cnt++;
11452 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11453 int number_entries, uint16_t * list,
11454 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11456 uint16_t len, old_len, i;
11457 struct sctp_stream_reset_out_request *req_out;
11458 struct sctp_chunkhdr *ch;
11460 ch = mtod(chk->data, struct sctp_chunkhdr *);
11461 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11463 /* get to new offset for the param. */
11464 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11465 /* now how long will this param be? */
11466 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11467 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11468 req_out->ph.param_length = htons(len);
11469 req_out->request_seq = htonl(seq);
11470 req_out->response_seq = htonl(resp_seq);
11471 req_out->send_reset_at_tsn = htonl(last_sent);
11472 if (number_entries) {
11473 for (i = 0; i < number_entries; i++) {
11474 req_out->list_of_streams[i] = htons(list[i]);
11477 if (SCTP_SIZE32(len) > len) {
11479 * Need to worry about the pad we may end up adding to the
11480 * end. This is easy since the struct is either aligned to 4
11481 * bytes or 2 bytes off.
11483 req_out->list_of_streams[number_entries] = 0;
11485 /* now fix the chunk length */
11486 ch->chunk_length = htons(len + old_len);
11487 chk->book_size = len + old_len;
11488 chk->book_size_scale = 0;
11489 chk->send_size = SCTP_SIZE32(chk->book_size);
11490 SCTP_BUF_LEN(chk->data) = chk->send_size;
11495 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11496 int number_entries, uint16_t * list,
11499 uint16_t len, old_len, i;
11500 struct sctp_stream_reset_in_request *req_in;
11501 struct sctp_chunkhdr *ch;
11503 ch = mtod(chk->data, struct sctp_chunkhdr *);
11504 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11506 /* get to new offset for the param. */
11507 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11508 /* now how long will this param be? */
11509 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11510 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11511 req_in->ph.param_length = htons(len);
11512 req_in->request_seq = htonl(seq);
11513 if (number_entries) {
11514 for (i = 0; i < number_entries; i++) {
11515 req_in->list_of_streams[i] = htons(list[i]);
11518 if (SCTP_SIZE32(len) > len) {
11520 * Need to worry about the pad we may end up adding to the
11521 * end. This is easy since the struct is either aligned to 4
11522 * bytes or 2 bytes off.
11524 req_in->list_of_streams[number_entries] = 0;
11526 /* now fix the chunk length */
11527 ch->chunk_length = htons(len + old_len);
11528 chk->book_size = len + old_len;
11529 chk->book_size_scale = 0;
11530 chk->send_size = SCTP_SIZE32(chk->book_size);
11531 SCTP_BUF_LEN(chk->data) = chk->send_size;
11536 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11539 uint16_t len, old_len;
11540 struct sctp_stream_reset_tsn_request *req_tsn;
11541 struct sctp_chunkhdr *ch;
11543 ch = mtod(chk->data, struct sctp_chunkhdr *);
11544 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11546 /* get to new offset for the param. */
11547 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11548 /* now how long will this param be? */
11549 len = sizeof(struct sctp_stream_reset_tsn_request);
11550 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11551 req_tsn->ph.param_length = htons(len);
11552 req_tsn->request_seq = htonl(seq);
11554 /* now fix the chunk length */
11555 ch->chunk_length = htons(len + old_len);
11556 chk->send_size = len + old_len;
11557 chk->book_size = SCTP_SIZE32(chk->send_size);
11558 chk->book_size_scale = 0;
11559 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11564 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11565 uint32_t resp_seq, uint32_t result)
11567 uint16_t len, old_len;
11568 struct sctp_stream_reset_response *resp;
11569 struct sctp_chunkhdr *ch;
11571 ch = mtod(chk->data, struct sctp_chunkhdr *);
11572 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11574 /* get to new offset for the param. */
11575 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11576 /* now how long will this param be? */
11577 len = sizeof(struct sctp_stream_reset_response);
11578 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11579 resp->ph.param_length = htons(len);
11580 resp->response_seq = htonl(resp_seq);
11581 resp->result = ntohl(result);
11583 /* now fix the chunk length */
11584 ch->chunk_length = htons(len + old_len);
11585 chk->book_size = len + old_len;
11586 chk->book_size_scale = 0;
11587 chk->send_size = SCTP_SIZE32(chk->book_size);
11588 SCTP_BUF_LEN(chk->data) = chk->send_size;
11593 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11594 uint32_t resp_seq, uint32_t result,
11595 uint32_t send_una, uint32_t recv_next)
11597 uint16_t len, old_len;
11598 struct sctp_stream_reset_response_tsn *resp;
11599 struct sctp_chunkhdr *ch;
11601 ch = mtod(chk->data, struct sctp_chunkhdr *);
11602 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11604 /* get to new offset for the param. */
11605 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11606 /* now how long will this param be? */
11607 len = sizeof(struct sctp_stream_reset_response_tsn);
11608 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11609 resp->ph.param_length = htons(len);
11610 resp->response_seq = htonl(resp_seq);
11611 resp->result = htonl(result);
11612 resp->senders_next_tsn = htonl(send_una);
11613 resp->receivers_next_tsn = htonl(recv_next);
11615 /* now fix the chunk length */
11616 ch->chunk_length = htons(len + old_len);
11617 chk->book_size = len + old_len;
11618 chk->send_size = SCTP_SIZE32(chk->book_size);
11619 chk->book_size_scale = 0;
11620 SCTP_BUF_LEN(chk->data) = chk->send_size;
11625 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11629 uint16_t len, old_len;
11630 struct sctp_chunkhdr *ch;
11631 struct sctp_stream_reset_add_strm *addstr;
11633 ch = mtod(chk->data, struct sctp_chunkhdr *);
11634 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11636 /* get to new offset for the param. */
11637 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11638 /* now how long will this param be? */
11639 len = sizeof(struct sctp_stream_reset_add_strm);
11642 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11643 addstr->ph.param_length = htons(len);
11644 addstr->request_seq = htonl(seq);
11645 addstr->number_of_streams = htons(adding);
11646 addstr->reserved = 0;
11648 /* now fix the chunk length */
11649 ch->chunk_length = htons(len + old_len);
11650 chk->send_size = len + old_len;
11651 chk->book_size = SCTP_SIZE32(chk->send_size);
11652 chk->book_size_scale = 0;
11653 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11658 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11662 uint16_t len, old_len;
11663 struct sctp_chunkhdr *ch;
11664 struct sctp_stream_reset_add_strm *addstr;
11666 ch = mtod(chk->data, struct sctp_chunkhdr *);
11667 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11669 /* get to new offset for the param. */
11670 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11671 /* now how long will this param be? */
11672 len = sizeof(struct sctp_stream_reset_add_strm);
11674 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11675 addstr->ph.param_length = htons(len);
11676 addstr->request_seq = htonl(seq);
11677 addstr->number_of_streams = htons(adding);
11678 addstr->reserved = 0;
11680 /* now fix the chunk length */
11681 ch->chunk_length = htons(len + old_len);
11682 chk->send_size = len + old_len;
11683 chk->book_size = SCTP_SIZE32(chk->send_size);
11684 chk->book_size_scale = 0;
11685 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11690 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11691 int number_entries, uint16_t * list,
11692 uint8_t send_out_req,
11693 uint8_t send_in_req,
11694 uint8_t send_tsn_req,
11695 uint8_t add_stream,
11697 uint16_t adding_i, uint8_t peer_asked)
11700 struct sctp_association *asoc;
11701 struct sctp_tmit_chunk *chk;
11702 struct sctp_chunkhdr *ch;
11705 asoc = &stcb->asoc;
11706 if (asoc->stream_reset_outstanding) {
11708 * Already one pending, must get ACK back to clear the flag.
11710 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11713 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11714 (add_stream == 0)) {
11715 /* nothing to do */
11716 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11719 if (send_tsn_req && (send_out_req || send_in_req)) {
11720 /* error, can't do that */
11721 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11724 sctp_alloc_a_chunk(stcb, chk);
11726 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11729 chk->copy_by_ref = 0;
11730 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11731 chk->rec.chunk_id.can_take_data = 0;
11732 chk->asoc = &stcb->asoc;
11733 chk->book_size = sizeof(struct sctp_chunkhdr);
11734 chk->send_size = SCTP_SIZE32(chk->book_size);
11735 chk->book_size_scale = 0;
11737 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11738 if (chk->data == NULL) {
11739 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11740 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11743 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11745 /* setup chunk parameters */
11746 chk->sent = SCTP_DATAGRAM_UNSENT;
11747 chk->snd_count = 0;
11748 if (stcb->asoc.alternate) {
11749 chk->whoTo = stcb->asoc.alternate;
11751 chk->whoTo = stcb->asoc.primary_destination;
11753 atomic_add_int(&chk->whoTo->ref_count, 1);
11754 ch = mtod(chk->data, struct sctp_chunkhdr *);
11755 ch->chunk_type = SCTP_STREAM_RESET;
11756 ch->chunk_flags = 0;
11757 ch->chunk_length = htons(chk->book_size);
11758 SCTP_BUF_LEN(chk->data) = chk->send_size;
11760 seq = stcb->asoc.str_reset_seq_out;
11761 if (send_out_req) {
11762 sctp_add_stream_reset_out(chk, number_entries, list,
11763 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
11764 asoc->stream_reset_out_is_outstanding = 1;
11766 asoc->stream_reset_outstanding++;
11768 if ((add_stream & 1) &&
11769 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
11770 /* Need to allocate more */
11771 struct sctp_stream_out *oldstream;
11772 struct sctp_stream_queue_pending *sp, *nsp;
11775 oldstream = stcb->asoc.strmout;
11776 /* get some more */
11777 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
11778 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)),
11780 if (stcb->asoc.strmout == NULL) {
11783 stcb->asoc.strmout = oldstream;
11784 /* Turn off the bit */
11785 x = add_stream & 0xfe;
11790 * Ok now we proceed with copying the old out stuff and
11791 * initializing the new stuff.
11793 SCTP_TCB_SEND_LOCK(stcb);
11794 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
11795 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11796 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11797 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
11798 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
11799 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
11800 stcb->asoc.strmout[i].stream_no = i;
11801 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
11802 /* now anything on those queues? */
11803 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
11804 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
11805 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
11807 /* Now move assoc pointers too */
11808 if (stcb->asoc.last_out_stream == &oldstream[i]) {
11809 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
11811 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
11812 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
11815 /* now the new streams */
11816 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
11817 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
11818 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11819 stcb->asoc.strmout[i].chunks_on_queues = 0;
11820 stcb->asoc.strmout[i].next_sequence_send = 0x0;
11821 stcb->asoc.strmout[i].stream_no = i;
11822 stcb->asoc.strmout[i].last_msg_incomplete = 0;
11823 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
11825 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
11826 SCTP_FREE(oldstream, SCTP_M_STRMO);
11827 SCTP_TCB_SEND_UNLOCK(stcb);
11830 if ((add_stream & 1) && (adding_o > 0)) {
11831 asoc->strm_pending_add_size = adding_o;
11832 asoc->peer_req_out = peer_asked;
11833 sctp_add_an_out_stream(chk, seq, adding_o);
11835 asoc->stream_reset_outstanding++;
11837 if ((add_stream & 2) && (adding_i > 0)) {
11838 sctp_add_an_in_stream(chk, seq, adding_i);
11840 asoc->stream_reset_outstanding++;
11843 sctp_add_stream_reset_in(chk, number_entries, list, seq);
11845 asoc->stream_reset_outstanding++;
11847 if (send_tsn_req) {
11848 sctp_add_stream_reset_tsn(chk, seq);
11849 asoc->stream_reset_outstanding++;
11851 asoc->str_reset = chk;
11852 /* insert the chunk for sending */
11853 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11856 asoc->ctrl_queue_cnt++;
11857 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11862 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
11863 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
11864 uint8_t use_mflowid, uint32_t mflowid,
11865 uint32_t vrf_id, uint16_t port)
11867 /* Don't respond to an ABORT with an ABORT. */
11868 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
11870 sctp_m_freem(cause);
11873 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
11874 use_mflowid, mflowid,
11880 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
11881 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
11882 uint8_t use_mflowid, uint32_t mflowid,
11883 uint32_t vrf_id, uint16_t port)
11885 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
11886 use_mflowid, mflowid,
11891 static struct mbuf *
11892 sctp_copy_resume(struct uio *uio,
11894 int user_marks_eor,
11897 struct mbuf **new_tail)
11901 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
11902 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
11904 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11907 *sndout = m_length(m, NULL);
11908 *new_tail = m_last(m);
11914 sctp_copy_one(struct sctp_stream_queue_pending *sp,
11921 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
11923 if (sp->data == NULL) {
11924 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11927 sp->tail_mbuf = m_last(sp->data);
11933 static struct sctp_stream_queue_pending *
11934 sctp_copy_it_in(struct sctp_tcb *stcb,
11935 struct sctp_association *asoc,
11936 struct sctp_sndrcvinfo *srcv,
11938 struct sctp_nets *net,
11940 int user_marks_eor,
11944 * This routine must be very careful in its work. Protocol
11945 * processing is up and running so care must be taken to spl...()
11946 * when you need to do something that may effect the stcb/asoc. The
11947 * sb is locked however. When data is copied the protocol processing
11948 * should be enabled since this is a slower operation...
11950 struct sctp_stream_queue_pending *sp = NULL;
11954 /* Now can we send this? */
11955 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
11956 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
11957 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
11958 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
11959 /* got data while shutting down */
11960 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
11961 *error = ECONNRESET;
11964 sctp_alloc_a_strmoq(stcb, sp);
11966 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11971 sp->sender_all_done = 0;
11972 sp->sinfo_flags = srcv->sinfo_flags;
11973 sp->timetolive = srcv->sinfo_timetolive;
11974 sp->ppid = srcv->sinfo_ppid;
11975 sp->context = srcv->sinfo_context;
11976 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
11978 sp->stream = srcv->sinfo_stream;
11979 sp->length = min(uio->uio_resid, max_send_len);
11980 if ((sp->length == (uint32_t) uio->uio_resid) &&
11981 ((user_marks_eor == 0) ||
11982 (srcv->sinfo_flags & SCTP_EOF) ||
11983 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
11984 sp->msg_is_complete = 1;
11986 sp->msg_is_complete = 0;
11988 sp->sender_all_done = 0;
11989 sp->some_taken = 0;
11990 sp->put_last_out = 0;
11991 resv_in_first = sizeof(struct sctp_data_chunk);
11992 sp->data = sp->tail_mbuf = NULL;
11993 if (sp->length == 0) {
11997 if (srcv->sinfo_keynumber_valid) {
11998 sp->auth_keyid = srcv->sinfo_keynumber;
12000 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12002 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12003 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12004 sp->holds_key_ref = 1;
12006 *error = sctp_copy_one(sp, uio, resv_in_first);
12009 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12012 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12014 atomic_add_int(&sp->net->ref_count, 1);
12018 sctp_set_prsctp_policy(sp);
12026 sctp_sosend(struct socket *so,
12027 struct sockaddr *addr,
12030 struct mbuf *control,
12035 int error, use_sndinfo = 0;
12036 struct sctp_sndrcvinfo sndrcvninfo;
12037 struct sockaddr *addr_to_use;
12039 #if defined(INET) && defined(INET6)
12040 struct sockaddr_in sin;
12045 /* process cmsg snd/rcv info (maybe a assoc-id) */
12046 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12047 sizeof(sndrcvninfo))) {
12052 addr_to_use = addr;
12053 #if defined(INET) && defined(INET6)
12054 if ((addr) && (addr->sa_family == AF_INET6)) {
12055 struct sockaddr_in6 *sin6;
12057 sin6 = (struct sockaddr_in6 *)addr;
12058 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12059 in6_sin6_2_sin(&sin, sin6);
12060 addr_to_use = (struct sockaddr *)&sin;
12064 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12067 use_sndinfo ? &sndrcvninfo : NULL
12075 sctp_lower_sosend(struct socket *so,
12076 struct sockaddr *addr,
12078 struct mbuf *i_pak,
12079 struct mbuf *control,
12081 struct sctp_sndrcvinfo *srcv
12086 unsigned int sndlen = 0, max_len;
12088 struct mbuf *top = NULL;
12089 int queue_only = 0, queue_only_for_init = 0;
12090 int free_cnt_applied = 0;
12092 int now_filled = 0;
12093 unsigned int inqueue_bytes = 0;
12094 struct sctp_block_entry be;
12095 struct sctp_inpcb *inp;
12096 struct sctp_tcb *stcb = NULL;
12097 struct timeval now;
12098 struct sctp_nets *net;
12099 struct sctp_association *asoc;
12100 struct sctp_inpcb *t_inp;
12101 int user_marks_eor;
12102 int create_lock_applied = 0;
12103 int nagle_applies = 0;
12104 int some_on_control = 0;
12105 int got_all_of_the_send = 0;
12106 int hold_tcblock = 0;
12107 int non_blocking = 0;
12108 uint32_t local_add_more, local_soresv = 0;
12110 uint16_t sinfo_flags;
12111 sctp_assoc_t sinfo_assoc_id;
12118 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12120 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12123 SCTP_RELEASE_PKT(i_pak);
12127 if ((uio == NULL) && (i_pak == NULL)) {
12128 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12131 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12132 atomic_add_int(&inp->total_sends, 1);
12134 if (uio->uio_resid < 0) {
12135 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12138 sndlen = uio->uio_resid;
12140 top = SCTP_HEADER_TO_CHAIN(i_pak);
12141 sndlen = SCTP_HEADER_LEN(i_pak);
12143 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12146 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12147 (inp->sctp_socket->so_qlimit)) {
12148 /* The listener can NOT send */
12149 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12154 * Pre-screen address, if one is given the sin-len
12155 * must be set correctly!
12158 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12160 switch (raddr->sa.sa_family) {
12163 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12164 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12168 port = raddr->sin.sin_port;
12173 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12174 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12178 port = raddr->sin6.sin6_port;
12182 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12183 error = EAFNOSUPPORT;
12190 sinfo_flags = srcv->sinfo_flags;
12191 sinfo_assoc_id = srcv->sinfo_assoc_id;
12192 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12193 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12194 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12198 if (srcv->sinfo_flags)
12199 SCTP_STAT_INCR(sctps_sends_with_flags);
12201 sinfo_flags = inp->def_send.sinfo_flags;
12202 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12204 if (sinfo_flags & SCTP_SENDALL) {
12205 /* its a sendall */
12206 error = sctp_sendall(inp, uio, top, srcv);
12210 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12211 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12215 /* now we must find the assoc */
12216 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12217 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12218 SCTP_INP_RLOCK(inp);
12219 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12221 SCTP_TCB_LOCK(stcb);
12224 SCTP_INP_RUNLOCK(inp);
12225 } else if (sinfo_assoc_id) {
12226 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12229 * Since we did not use findep we must
12230 * increment it, and if we don't find a tcb
12233 SCTP_INP_WLOCK(inp);
12234 SCTP_INP_INCR_REF(inp);
12235 SCTP_INP_WUNLOCK(inp);
12236 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12237 if (stcb == NULL) {
12238 SCTP_INP_WLOCK(inp);
12239 SCTP_INP_DECR_REF(inp);
12240 SCTP_INP_WUNLOCK(inp);
12245 if ((stcb == NULL) && (addr)) {
12246 /* Possible implicit send? */
12247 SCTP_ASOC_CREATE_LOCK(inp);
12248 create_lock_applied = 1;
12249 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12250 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12251 /* Should I really unlock ? */
12252 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12257 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12258 (addr->sa_family == AF_INET6)) {
12259 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12263 SCTP_INP_WLOCK(inp);
12264 SCTP_INP_INCR_REF(inp);
12265 SCTP_INP_WUNLOCK(inp);
12266 /* With the lock applied look again */
12267 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12268 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12269 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12271 if (stcb == NULL) {
12272 SCTP_INP_WLOCK(inp);
12273 SCTP_INP_DECR_REF(inp);
12274 SCTP_INP_WUNLOCK(inp);
12281 if (t_inp != inp) {
12282 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12287 if (stcb == NULL) {
12288 if (addr == NULL) {
12289 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12293 /* We must go ahead and start the INIT process */
12296 if ((sinfo_flags & SCTP_ABORT) ||
12297 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12299 * User asks to abort a non-existant assoc,
12300 * or EOF a non-existant assoc with no data
12302 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12306 /* get an asoc/stcb struct */
12307 vrf_id = inp->def_vrf_id;
12309 if (create_lock_applied == 0) {
12310 panic("Error, should hold create lock and I don't?");
12313 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12316 if (stcb == NULL) {
12317 /* Error is setup for us in the call */
12320 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12321 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12323 * Set the connected flag so we can queue
12326 soisconnecting(so);
12329 if (create_lock_applied) {
12330 SCTP_ASOC_CREATE_UNLOCK(inp);
12331 create_lock_applied = 0;
12333 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12336 * Turn on queue only flag to prevent data from
12340 asoc = &stcb->asoc;
12341 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12342 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12344 /* initialize authentication params for the assoc */
12345 sctp_initialize_auth_params(inp, stcb);
12348 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12349 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7);
12355 /* out with the INIT */
12356 queue_only_for_init = 1;
12358 * we may want to dig in after this call and adjust the MTU
12359 * value. It defaulted to 1500 (constant) but the ro
12360 * structure may now have an update and thus we may need to
12361 * change it BEFORE we append the message.
12365 asoc = &stcb->asoc;
12367 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12368 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12370 net = sctp_findnet(stcb, addr);
12373 if ((net == NULL) ||
12374 ((port != 0) && (port != stcb->rport))) {
12375 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12380 if (stcb->asoc.alternate) {
12381 net = stcb->asoc.alternate;
12383 net = stcb->asoc.primary_destination;
12386 atomic_add_int(&stcb->total_sends, 1);
12387 /* Keep the stcb from being freed under our feet */
12388 atomic_add_int(&asoc->refcnt, 1);
12389 free_cnt_applied = 1;
12391 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12392 if (sndlen > asoc->smallest_mtu) {
12393 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12398 if (SCTP_SO_IS_NBIO(so)
12399 || (flags & MSG_NBIO)
12403 /* would we block? */
12404 if (non_blocking) {
12405 if (hold_tcblock == 0) {
12406 SCTP_TCB_LOCK(stcb);
12409 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12410 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12411 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12412 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12413 if (sndlen > SCTP_SB_LIMIT_SND(so))
12416 error = EWOULDBLOCK;
12419 stcb->asoc.sb_send_resv += sndlen;
12420 SCTP_TCB_UNLOCK(stcb);
12423 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12425 local_soresv = sndlen;
12426 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12427 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12428 error = ECONNRESET;
12431 if (create_lock_applied) {
12432 SCTP_ASOC_CREATE_UNLOCK(inp);
12433 create_lock_applied = 0;
12435 if (asoc->stream_reset_outstanding) {
12437 * Can't queue any data while stream reset is underway.
12439 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
12443 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12444 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12447 /* we are now done with all control */
12449 sctp_m_freem(control);
12452 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12453 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12454 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12455 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12456 if (srcv->sinfo_flags & SCTP_ABORT) {
12459 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12460 error = ECONNRESET;
12464 /* Ok, we will attempt a msgsnd :> */
12466 p->td_ru.ru_msgsnd++;
12468 /* Are we aborting? */
12469 if (srcv->sinfo_flags & SCTP_ABORT) {
12471 int tot_demand, tot_out = 0, max_out;
12473 SCTP_STAT_INCR(sctps_sends_with_abort);
12474 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12475 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12476 /* It has to be up before we abort */
12477 /* how big is the user initiated abort? */
12478 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12482 if (hold_tcblock) {
12483 SCTP_TCB_UNLOCK(stcb);
12487 struct mbuf *cntm = NULL;
12489 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAIT, 1, MT_DATA);
12491 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12492 tot_out += SCTP_BUF_LEN(cntm);
12496 /* Must fit in a MTU */
12498 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12499 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12501 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12505 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAIT, 1, MT_DATA);
12508 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12512 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12513 max_out -= sizeof(struct sctp_abort_msg);
12514 if (tot_out > max_out) {
12518 struct sctp_paramhdr *ph;
12520 /* now move forward the data pointer */
12521 ph = mtod(mm, struct sctp_paramhdr *);
12522 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12523 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
12525 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12527 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12530 * Here if we can't get his data we
12531 * still abort we just don't get to
12532 * send the users note :-0
12539 SCTP_BUF_NEXT(mm) = top;
12543 if (hold_tcblock == 0) {
12544 SCTP_TCB_LOCK(stcb);
12546 atomic_add_int(&stcb->asoc.refcnt, -1);
12547 free_cnt_applied = 0;
12548 /* release this lock, otherwise we hang on ourselves */
12549 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12550 /* now relock the stcb so everything is sane */
12554 * In this case top is already chained to mm avoid double
12555 * free, since we free it below if top != NULL and driver
12556 * would free it after sending the packet out
12563 /* Calculate the maximum we can send */
12564 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12565 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12566 if (non_blocking) {
12567 /* we already checked for non-blocking above. */
12570 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12575 if (hold_tcblock) {
12576 SCTP_TCB_UNLOCK(stcb);
12579 /* Is the stream no. valid? */
12580 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12581 /* Invalid stream number */
12582 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12586 if (asoc->strmout == NULL) {
12587 /* huh? software error */
12588 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12592 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12593 if ((user_marks_eor == 0) &&
12594 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12595 /* It will NEVER fit */
12596 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12600 if ((uio == NULL) && user_marks_eor) {
12602 * We do not support eeor mode for
12603 * sending with mbuf chains (like sendfile).
12605 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12609 if (user_marks_eor) {
12610 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12613 * For non-eeor the whole message must fit in
12614 * the socket send buffer.
12616 local_add_more = sndlen;
12619 if (non_blocking) {
12620 goto skip_preblock;
12622 if (((max_len <= local_add_more) &&
12623 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12625 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12626 /* No room right now ! */
12627 SOCKBUF_LOCK(&so->so_snd);
12628 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12629 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12630 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12631 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12632 (unsigned int)SCTP_SB_LIMIT_SND(so),
12635 stcb->asoc.stream_queue_cnt,
12636 stcb->asoc.chunks_on_out_queue,
12637 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12638 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12639 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
12642 stcb->block_entry = &be;
12643 error = sbwait(&so->so_snd);
12644 stcb->block_entry = NULL;
12645 if (error || so->so_error || be.error) {
12648 error = so->so_error;
12653 SOCKBUF_UNLOCK(&so->so_snd);
12656 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12657 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12658 asoc, stcb->asoc.total_output_queue_size);
12660 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12663 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12665 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12666 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12670 SOCKBUF_UNLOCK(&so->so_snd);
12673 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12677 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
12678 * case NOTE: uio will be null when top/mbuf is passed
12681 if (srcv->sinfo_flags & SCTP_EOF) {
12682 got_all_of_the_send = 1;
12685 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12691 struct sctp_stream_queue_pending *sp;
12692 struct sctp_stream_out *strm;
12695 SCTP_TCB_SEND_LOCK(stcb);
12696 if ((asoc->stream_locked) &&
12697 (asoc->stream_locked_on != srcv->sinfo_stream)) {
12698 SCTP_TCB_SEND_UNLOCK(stcb);
12699 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12703 SCTP_TCB_SEND_UNLOCK(stcb);
12705 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
12706 if (strm->last_msg_incomplete == 0) {
12708 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
12709 if ((sp == NULL) || (error)) {
12712 SCTP_TCB_SEND_LOCK(stcb);
12713 if (sp->msg_is_complete) {
12714 strm->last_msg_incomplete = 0;
12715 asoc->stream_locked = 0;
12718 * Just got locked to this guy in case of an
12721 strm->last_msg_incomplete = 1;
12722 asoc->stream_locked = 1;
12723 asoc->stream_locked_on = srcv->sinfo_stream;
12724 sp->sender_all_done = 0;
12726 sctp_snd_sb_alloc(stcb, sp->length);
12727 atomic_add_int(&asoc->stream_queue_cnt, 1);
12728 if (srcv->sinfo_flags & SCTP_UNORDERED) {
12729 SCTP_STAT_INCR(sctps_sends_with_unord);
12731 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
12732 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
12733 SCTP_TCB_SEND_UNLOCK(stcb);
12735 SCTP_TCB_SEND_LOCK(stcb);
12736 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
12737 SCTP_TCB_SEND_UNLOCK(stcb);
12739 /* ???? Huh ??? last msg is gone */
12741 panic("Warning: Last msg marked incomplete, yet nothing left?");
12743 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
12744 strm->last_msg_incomplete = 0;
12750 while (uio->uio_resid > 0) {
12751 /* How much room do we have? */
12752 struct mbuf *new_tail, *mm;
12754 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12755 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
12759 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
12760 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
12761 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
12764 if (hold_tcblock) {
12765 SCTP_TCB_UNLOCK(stcb);
12768 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
12769 if ((mm == NULL) || error) {
12775 /* Update the mbuf and count */
12776 SCTP_TCB_SEND_LOCK(stcb);
12777 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12779 * we need to get out. Peer probably
12783 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
12784 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12785 error = ECONNRESET;
12787 SCTP_TCB_SEND_UNLOCK(stcb);
12790 if (sp->tail_mbuf) {
12791 /* tack it to the end */
12792 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
12793 sp->tail_mbuf = new_tail;
12795 /* A stolen mbuf */
12797 sp->tail_mbuf = new_tail;
12799 sctp_snd_sb_alloc(stcb, sndout);
12800 atomic_add_int(&sp->length, sndout);
12803 /* Did we reach EOR? */
12804 if ((uio->uio_resid == 0) &&
12805 ((user_marks_eor == 0) ||
12806 (srcv->sinfo_flags & SCTP_EOF) ||
12807 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12808 sp->msg_is_complete = 1;
12810 sp->msg_is_complete = 0;
12812 SCTP_TCB_SEND_UNLOCK(stcb);
12814 if (uio->uio_resid == 0) {
12819 if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
12821 * This is ugly but we must assure locking
12824 if (hold_tcblock == 0) {
12825 SCTP_TCB_LOCK(stcb);
12828 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
12829 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12830 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12831 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12837 SCTP_TCB_UNLOCK(stcb);
12840 /* wait for space now */
12841 if (non_blocking) {
12842 /* Non-blocking io in place out */
12845 /* What about the INIT, send it maybe */
12846 if (queue_only_for_init) {
12847 if (hold_tcblock == 0) {
12848 SCTP_TCB_LOCK(stcb);
12851 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
12852 /* a collision took us forward? */
12855 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
12856 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12860 if ((net->flight_size > net->cwnd) &&
12861 (asoc->sctp_cmt_on_off == 0)) {
12862 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
12864 } else if (asoc->ifp_had_enobuf) {
12865 SCTP_STAT_INCR(sctps_ifnomemqueued);
12866 if (net->flight_size > (2 * net->mtu)) {
12869 asoc->ifp_had_enobuf = 0;
12871 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
12872 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
12873 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
12874 (stcb->asoc.total_flight > 0) &&
12875 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
12876 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
12879 * Ok, Nagle is set on and we have data outstanding.
12880 * Don't send anything and let SACKs drive out the
12881 * data unless wen have a "full" segment to send.
12883 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12884 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
12886 SCTP_STAT_INCR(sctps_naglequeued);
12889 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12890 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
12891 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
12893 SCTP_STAT_INCR(sctps_naglesent);
12896 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12898 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
12899 nagle_applies, un_sent);
12900 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
12901 stcb->asoc.total_flight,
12902 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
12904 if (queue_only_for_init)
12905 queue_only_for_init = 0;
12906 if ((queue_only == 0) && (nagle_applies == 0)) {
12908 * need to start chunk output
12909 * before blocking.. note that if
12910 * a lock is already applied, then
12911 * the input via the net is happening
12912 * and I don't need to start output :-D
12914 if (hold_tcblock == 0) {
12915 if (SCTP_TCB_TRYLOCK(stcb)) {
12917 sctp_chunk_output(inp,
12919 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
12922 sctp_chunk_output(inp,
12924 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
12926 if (hold_tcblock == 1) {
12927 SCTP_TCB_UNLOCK(stcb);
12931 SOCKBUF_LOCK(&so->so_snd);
12933 * This is a bit strange, but I think it will
12934 * work. The total_output_queue_size is locked and
12935 * protected by the TCB_LOCK, which we just released.
12936 * There is a race that can occur between releasing it
12937 * above, and me getting the socket lock, where sacks
12938 * come in but we have not put the SB_WAIT on the
12939 * so_snd buffer to get the wakeup. After the LOCK
12940 * is applied the sack_processing will also need to
12941 * LOCK the so->so_snd to do the actual sowwakeup(). So
12942 * once we have the socket buffer lock if we recheck the
12943 * size we KNOW we will get to sleep safely with the
12944 * wakeup flag in place.
12946 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
12947 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
12948 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12949 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
12950 asoc, uio->uio_resid);
12953 stcb->block_entry = &be;
12954 error = sbwait(&so->so_snd);
12955 stcb->block_entry = NULL;
12957 if (error || so->so_error || be.error) {
12960 error = so->so_error;
12965 SOCKBUF_UNLOCK(&so->so_snd);
12968 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12969 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12970 asoc, stcb->asoc.total_output_queue_size);
12973 SOCKBUF_UNLOCK(&so->so_snd);
12974 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12978 SCTP_TCB_SEND_LOCK(stcb);
12980 if (sp->msg_is_complete == 0) {
12981 strm->last_msg_incomplete = 1;
12982 asoc->stream_locked = 1;
12983 asoc->stream_locked_on = srcv->sinfo_stream;
12985 sp->sender_all_done = 1;
12986 strm->last_msg_incomplete = 0;
12987 asoc->stream_locked = 0;
12990 SCTP_PRINTF("Huh no sp TSNH?\n");
12991 strm->last_msg_incomplete = 0;
12992 asoc->stream_locked = 0;
12994 SCTP_TCB_SEND_UNLOCK(stcb);
12995 if (uio->uio_resid == 0) {
12996 got_all_of_the_send = 1;
12999 /* We send in a 0, since we do NOT have any locks */
13000 error = sctp_msg_append(stcb, net, top, srcv, 0);
13002 if (srcv->sinfo_flags & SCTP_EOF) {
13004 * This should only happen for Panda for the mbuf
13005 * send case, which does NOT yet support EEOR mode.
13006 * Thus, we can just set this flag to do the proper
13009 got_all_of_the_send = 1;
13017 if ((srcv->sinfo_flags & SCTP_EOF) &&
13018 (got_all_of_the_send == 1)) {
13021 SCTP_STAT_INCR(sctps_sends_with_eof);
13023 if (hold_tcblock == 0) {
13024 SCTP_TCB_LOCK(stcb);
13027 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13028 if (TAILQ_EMPTY(&asoc->send_queue) &&
13029 TAILQ_EMPTY(&asoc->sent_queue) &&
13031 if (asoc->locked_on_sending) {
13034 /* there is nothing queued to send, so I'm done... */
13035 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13036 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13037 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13038 struct sctp_nets *netp;
13040 /* only send SHUTDOWN the first time through */
13041 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13042 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13044 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13045 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13046 sctp_stop_timers_for_shutdown(stcb);
13047 if (stcb->asoc.alternate) {
13048 netp = stcb->asoc.alternate;
13050 netp = stcb->asoc.primary_destination;
13052 sctp_send_shutdown(stcb, netp);
13053 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13055 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13056 asoc->primary_destination);
13060 * we still got (or just got) data to send, so set
13064 * XXX sockets draft says that SCTP_EOF should be
13065 * sent with no data. currently, we will allow user
13066 * data to be sent first and move to
13069 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13070 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13071 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13072 if (hold_tcblock == 0) {
13073 SCTP_TCB_LOCK(stcb);
13076 if (asoc->locked_on_sending) {
13077 /* Locked to send out the data */
13078 struct sctp_stream_queue_pending *sp;
13080 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13082 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13083 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13086 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13087 if (TAILQ_EMPTY(&asoc->send_queue) &&
13088 TAILQ_EMPTY(&asoc->sent_queue) &&
13089 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13091 if (free_cnt_applied) {
13092 atomic_add_int(&stcb->asoc.refcnt, -1);
13093 free_cnt_applied = 0;
13095 sctp_abort_an_association(stcb->sctp_ep, stcb,
13096 NULL, SCTP_SO_LOCKED);
13098 * now relock the stcb so everything
13105 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13106 asoc->primary_destination);
13107 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13112 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13113 some_on_control = 1;
13115 if (queue_only_for_init) {
13116 if (hold_tcblock == 0) {
13117 SCTP_TCB_LOCK(stcb);
13120 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13121 /* a collision took us forward? */
13124 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13125 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13129 if ((net->flight_size > net->cwnd) &&
13130 (stcb->asoc.sctp_cmt_on_off == 0)) {
13131 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13133 } else if (asoc->ifp_had_enobuf) {
13134 SCTP_STAT_INCR(sctps_ifnomemqueued);
13135 if (net->flight_size > (2 * net->mtu)) {
13138 asoc->ifp_had_enobuf = 0;
13140 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13141 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13142 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13143 (stcb->asoc.total_flight > 0) &&
13144 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13145 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13147 * Ok, Nagle is set on and we have data outstanding.
13148 * Don't send anything and let SACKs drive out the
13149 * data unless wen have a "full" segment to send.
13151 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13152 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13154 SCTP_STAT_INCR(sctps_naglequeued);
13157 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13158 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13159 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13161 SCTP_STAT_INCR(sctps_naglesent);
13164 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13165 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13166 nagle_applies, un_sent);
13167 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13168 stcb->asoc.total_flight,
13169 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13171 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13172 /* we can attempt to send too. */
13173 if (hold_tcblock == 0) {
13175 * If there is activity recv'ing sacks no need to
13178 if (SCTP_TCB_TRYLOCK(stcb)) {
13179 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13183 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13185 } else if ((queue_only == 0) &&
13186 (stcb->asoc.peers_rwnd == 0) &&
13187 (stcb->asoc.total_flight == 0)) {
13188 /* We get to have a probe outstanding */
13189 if (hold_tcblock == 0) {
13191 SCTP_TCB_LOCK(stcb);
13193 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13194 } else if (some_on_control) {
13195 int num_out, reason, frag_point;
13197 /* Here we do control only */
13198 if (hold_tcblock == 0) {
13200 SCTP_TCB_LOCK(stcb);
13202 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13203 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13204 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13206 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13207 queue_only, stcb->asoc.peers_rwnd, un_sent,
13208 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13209 stcb->asoc.total_output_queue_size, error);
13214 if (local_soresv && stcb) {
13215 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13217 if (create_lock_applied) {
13218 SCTP_ASOC_CREATE_UNLOCK(inp);
13220 if ((stcb) && hold_tcblock) {
13221 SCTP_TCB_UNLOCK(stcb);
13223 if (stcb && free_cnt_applied) {
13224 atomic_add_int(&stcb->asoc.refcnt, -1);
13228 if (mtx_owned(&stcb->tcb_mtx)) {
13229 panic("Leaving with tcb mtx owned?");
13231 if (mtx_owned(&stcb->tcb_send_mtx)) {
13232 panic("Leaving with tcb send mtx owned?");
13238 sctp_validate_no_locks(inp);
13240 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
13247 sctp_m_freem(control);
13254 * generate an AUTHentication chunk, if required
13257 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13258 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13259 struct sctp_tcb *stcb, uint8_t chunk)
13261 struct mbuf *m_auth;
13262 struct sctp_auth_chunk *auth;
13266 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13270 /* sysctl disabled auth? */
13271 if (SCTP_BASE_SYSCTL(sctp_auth_disable))
13274 /* peer doesn't do auth... */
13275 if (!stcb->asoc.peer_supports_auth) {
13278 /* does the requested chunk require auth? */
13279 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13282 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_DONTWAIT, 1, MT_HEADER);
13283 if (m_auth == NULL) {
13287 /* reserve some space if this will be the first mbuf */
13289 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13290 /* fill in the AUTH chunk details */
13291 auth = mtod(m_auth, struct sctp_auth_chunk *);
13292 bzero(auth, sizeof(*auth));
13293 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13294 auth->ch.chunk_flags = 0;
13295 chunk_len = sizeof(*auth) +
13296 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13297 auth->ch.chunk_length = htons(chunk_len);
13298 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13299 /* key id and hmac digest will be computed and filled in upon send */
13301 /* save the offset where the auth was inserted into the chain */
13303 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13304 *offset += SCTP_BUF_LEN(cn);
13307 /* update length and return pointer to the auth chunk */
13308 SCTP_BUF_LEN(m_auth) = chunk_len;
13309 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13310 if (auth_ret != NULL)
13318 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13320 struct nd_prefix *pfx = NULL;
13321 struct nd_pfxrouter *pfxrtr = NULL;
13322 struct sockaddr_in6 gw6;
13324 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13327 /* get prefix entry of address */
13328 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13329 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13331 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13332 &src6->sin6_addr, &pfx->ndpr_mask))
13335 /* no prefix entry in the prefix list */
13337 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13338 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13341 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13342 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13344 /* search installed gateway from prefix entry */
13345 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13346 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13347 gw6.sin6_family = AF_INET6;
13348 gw6.sin6_len = sizeof(struct sockaddr_in6);
13349 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13350 sizeof(struct in6_addr));
13351 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13352 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13353 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13354 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13355 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13356 ro->ro_rt->rt_gateway)) {
13357 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13361 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13368 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13371 struct sockaddr_in *sin, *mask;
13372 struct ifaddr *ifa;
13373 struct in_addr srcnetaddr, gwnetaddr;
13375 if (ro == NULL || ro->ro_rt == NULL ||
13376 sifa->address.sa.sa_family != AF_INET) {
13379 ifa = (struct ifaddr *)sifa->ifa;
13380 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13381 sin = (struct sockaddr_in *)&sifa->address.sin;
13382 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13383 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13384 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13385 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13387 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13388 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13389 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13390 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13391 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13392 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {