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 int ipv4_addr_legal,
1867 int ipv6_addr_legal,
1869 int ipv4_local_scope,
1870 int local_scope SCTP_UNUSED,/* XXX */
1874 if ((loopback_scope == 0) &&
1875 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1877 * skip loopback if not in scope *
1881 switch (ifa->address.sa.sa_family) {
1884 if (ipv4_addr_legal) {
1885 struct sockaddr_in *sin;
1887 sin = (struct sockaddr_in *)&ifa->address.sin;
1888 if (sin->sin_addr.s_addr == 0) {
1889 /* not in scope , unspecified */
1892 if ((ipv4_local_scope == 0) &&
1893 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1894 /* private address not in scope */
1904 if (ipv6_addr_legal) {
1905 struct sockaddr_in6 *sin6;
1908 * Must update the flags, bummer, which means any
1909 * IFA locks must now be applied HERE <->
1912 sctp_gather_internal_ifa_flags(ifa);
1914 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1917 /* ok to use deprecated addresses? */
1918 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
1919 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1920 /* skip unspecifed addresses */
1923 if ( /* (local_scope == 0) && */
1924 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1927 if ((site_scope == 0) &&
1928 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1942 static struct mbuf *
1943 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa)
1945 struct sctp_paramhdr *parmh;
1949 switch (ifa->address.sa.sa_family) {
1952 len = sizeof(struct sctp_ipv4addr_param);
1957 len = sizeof(struct sctp_ipv6addr_param);
1963 if (M_TRAILINGSPACE(m) >= len) {
1964 /* easy side we just drop it on the end */
1965 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1968 /* Need more space */
1970 while (SCTP_BUF_NEXT(mret) != NULL) {
1971 mret = SCTP_BUF_NEXT(mret);
1973 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(len, 0, M_DONTWAIT, 1, MT_DATA);
1974 if (SCTP_BUF_NEXT(mret) == NULL) {
1975 /* We are hosed, can't add more addresses */
1978 mret = SCTP_BUF_NEXT(mret);
1979 parmh = mtod(mret, struct sctp_paramhdr *);
1981 /* now add the parameter */
1982 switch (ifa->address.sa.sa_family) {
1986 struct sctp_ipv4addr_param *ipv4p;
1987 struct sockaddr_in *sin;
1989 sin = (struct sockaddr_in *)&ifa->address.sin;
1990 ipv4p = (struct sctp_ipv4addr_param *)parmh;
1991 parmh->param_type = htons(SCTP_IPV4_ADDRESS);
1992 parmh->param_length = htons(len);
1993 ipv4p->addr = sin->sin_addr.s_addr;
1994 SCTP_BUF_LEN(mret) += len;
2001 struct sctp_ipv6addr_param *ipv6p;
2002 struct sockaddr_in6 *sin6;
2004 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2005 ipv6p = (struct sctp_ipv6addr_param *)parmh;
2006 parmh->param_type = htons(SCTP_IPV6_ADDRESS);
2007 parmh->param_length = htons(len);
2008 memcpy(ipv6p->addr, &sin6->sin6_addr,
2009 sizeof(ipv6p->addr));
2010 /* clear embedded scope in the address */
2011 in6_clearscope((struct in6_addr *)ipv6p->addr);
2012 SCTP_BUF_LEN(mret) += len;
2024 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2025 struct sctp_scoping *scope,
2026 struct mbuf *m_at, int cnt_inits_to)
2028 struct sctp_vrf *vrf = NULL;
2029 int cnt, limit_out = 0, total_count;
2032 vrf_id = inp->def_vrf_id;
2033 SCTP_IPI_ADDR_RLOCK();
2034 vrf = sctp_find_vrf(vrf_id);
2036 SCTP_IPI_ADDR_RUNLOCK();
2039 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2040 struct sctp_ifa *sctp_ifap;
2041 struct sctp_ifn *sctp_ifnp;
2044 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2046 cnt = SCTP_ADDRESS_LIMIT;
2049 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2050 if ((scope->loopback_scope == 0) &&
2051 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2053 * Skip loopback devices if loopback_scope
2058 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2059 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2062 if (sctp_is_address_in_scope(sctp_ifap,
2063 scope->ipv4_addr_legal,
2064 scope->ipv6_addr_legal,
2065 scope->loopback_scope,
2066 scope->ipv4_local_scope,
2068 scope->site_scope, 1) == 0) {
2072 if (cnt > SCTP_ADDRESS_LIMIT) {
2076 if (cnt > SCTP_ADDRESS_LIMIT) {
2083 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2085 if ((scope->loopback_scope == 0) &&
2086 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2088 * Skip loopback devices if
2089 * loopback_scope not set
2093 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2094 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2097 if (sctp_is_address_in_scope(sctp_ifap,
2098 scope->ipv4_addr_legal,
2099 scope->ipv6_addr_legal,
2100 scope->loopback_scope,
2101 scope->ipv4_local_scope,
2103 scope->site_scope, 0) == 0) {
2106 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap);
2117 if (total_count > SCTP_ADDRESS_LIMIT) {
2118 /* No more addresses */
2126 struct sctp_laddr *laddr;
2129 /* First, how many ? */
2130 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2131 if (laddr->ifa == NULL) {
2134 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2136 * Address being deleted by the system, dont
2140 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2142 * Address being deleted on this ep don't
2147 if (sctp_is_address_in_scope(laddr->ifa,
2148 scope->ipv4_addr_legal,
2149 scope->ipv6_addr_legal,
2150 scope->loopback_scope,
2151 scope->ipv4_local_scope,
2153 scope->site_scope, 1) == 0) {
2159 * To get through a NAT we only list addresses if we have
2160 * more than one. That way if you just bind a single address
2161 * we let the source of the init dictate our address.
2165 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2166 if (laddr->ifa == NULL) {
2169 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2172 if (sctp_is_address_in_scope(laddr->ifa,
2173 scope->ipv4_addr_legal,
2174 scope->ipv6_addr_legal,
2175 scope->loopback_scope,
2176 scope->ipv4_local_scope,
2178 scope->site_scope, 0) == 0) {
2181 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa);
2183 if (cnt >= SCTP_ADDRESS_LIMIT) {
2189 SCTP_IPI_ADDR_RUNLOCK();
2193 static struct sctp_ifa *
2194 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2195 uint8_t dest_is_loop,
2196 uint8_t dest_is_priv,
2199 uint8_t dest_is_global = 0;
2201 /* dest_is_priv is true if destination is a private address */
2202 /* dest_is_loop is true if destination is a loopback addresses */
2205 * Here we determine if its a preferred address. A preferred address
2206 * means it is the same scope or higher scope then the destination.
2207 * L = loopback, P = private, G = global
2208 * -----------------------------------------
2209 * src | dest | result
2210 * ----------------------------------------
2212 * -----------------------------------------
2213 * P | L | yes-v4 no-v6
2214 * -----------------------------------------
2215 * G | L | yes-v4 no-v6
2216 * -----------------------------------------
2218 * -----------------------------------------
2220 * -----------------------------------------
2222 * -----------------------------------------
2224 * -----------------------------------------
2226 * -----------------------------------------
2228 * -----------------------------------------
2231 if (ifa->address.sa.sa_family != fam) {
2232 /* forget mis-matched family */
2235 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2238 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2239 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2240 /* Ok the address may be ok */
2242 if (fam == AF_INET6) {
2243 /* ok to use deprecated addresses? no lets not! */
2244 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2245 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2248 if (ifa->src_is_priv && !ifa->src_is_loop) {
2250 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2254 if (ifa->src_is_glob) {
2256 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2263 * Now that we know what is what, implement or table this could in
2264 * theory be done slicker (it used to be), but this is
2265 * straightforward and easier to validate :-)
2267 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2268 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2269 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2270 dest_is_loop, dest_is_priv, dest_is_global);
2272 if ((ifa->src_is_loop) && (dest_is_priv)) {
2273 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2276 if ((ifa->src_is_glob) && (dest_is_priv)) {
2277 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2280 if ((ifa->src_is_loop) && (dest_is_global)) {
2281 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2284 if ((ifa->src_is_priv) && (dest_is_global)) {
2285 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2288 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2289 /* its a preferred address */
2293 static struct sctp_ifa *
2294 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2295 uint8_t dest_is_loop,
2296 uint8_t dest_is_priv,
2299 uint8_t dest_is_global = 0;
2302 * Here we determine if its a acceptable address. A acceptable
2303 * address means it is the same scope or higher scope but we can
2304 * allow for NAT which means its ok to have a global dest and a
2307 * L = loopback, P = private, G = global
2308 * -----------------------------------------
2309 * src | dest | result
2310 * -----------------------------------------
2312 * -----------------------------------------
2313 * P | L | yes-v4 no-v6
2314 * -----------------------------------------
2316 * -----------------------------------------
2318 * -----------------------------------------
2320 * -----------------------------------------
2321 * G | P | yes - May not work
2322 * -----------------------------------------
2324 * -----------------------------------------
2325 * P | G | yes - May not work
2326 * -----------------------------------------
2328 * -----------------------------------------
2331 if (ifa->address.sa.sa_family != fam) {
2332 /* forget non matching family */
2333 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2334 ifa->address.sa.sa_family, fam);
2337 /* Ok the address may be ok */
2338 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2339 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2340 dest_is_loop, dest_is_priv);
2341 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2345 if (fam == AF_INET6) {
2346 /* ok to use deprecated addresses? */
2347 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2350 if (ifa->src_is_priv) {
2351 /* Special case, linklocal to loop */
2358 * Now that we know what is what, implement our table. This could in
2359 * theory be done slicker (it used to be), but this is
2360 * straightforward and easier to validate :-)
2362 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2365 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2368 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2371 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2374 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2375 /* its an acceptable address */
2380 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2382 struct sctp_laddr *laddr;
2385 /* There are no restrictions, no TCB :-) */
2388 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2389 if (laddr->ifa == NULL) {
2390 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2394 if (laddr->ifa == ifa) {
2395 /* Yes it is on the list */
2404 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2406 struct sctp_laddr *laddr;
2410 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2411 if (laddr->ifa == NULL) {
2412 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2416 if ((laddr->ifa == ifa) && laddr->action == 0)
2425 static struct sctp_ifa *
2426 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2429 int non_asoc_addr_ok,
2430 uint8_t dest_is_priv,
2431 uint8_t dest_is_loop,
2434 struct sctp_laddr *laddr, *starting_point;
2437 struct sctp_ifn *sctp_ifn;
2438 struct sctp_ifa *sctp_ifa, *sifa;
2439 struct sctp_vrf *vrf;
2442 vrf = sctp_find_vrf(vrf_id);
2446 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2447 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2448 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2450 * first question, is the ifn we will emit on in our list, if so, we
2451 * want such an address. Note that we first looked for a preferred
2455 /* is a preferred one on the interface we route out? */
2456 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2457 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2458 (non_asoc_addr_ok == 0))
2460 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2465 if (sctp_is_addr_in_ep(inp, sifa)) {
2466 atomic_add_int(&sifa->refcount, 1);
2472 * ok, now we now need to find one on the list of the addresses. We
2473 * can't get one on the emitting interface so let's find first a
2474 * preferred one. If not that an acceptable one otherwise... we
2477 starting_point = inp->next_addr_touse;
2479 if (inp->next_addr_touse == NULL) {
2480 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2483 for (laddr = inp->next_addr_touse; laddr;
2484 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2485 if (laddr->ifa == NULL) {
2486 /* address has been removed */
2489 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2490 /* address is being deleted */
2493 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2497 atomic_add_int(&sifa->refcount, 1);
2500 if (resettotop == 0) {
2501 inp->next_addr_touse = NULL;
2504 inp->next_addr_touse = starting_point;
2507 if (inp->next_addr_touse == NULL) {
2508 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2511 /* ok, what about an acceptable address in the inp */
2512 for (laddr = inp->next_addr_touse; laddr;
2513 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2514 if (laddr->ifa == NULL) {
2515 /* address has been removed */
2518 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2519 /* address is being deleted */
2522 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2526 atomic_add_int(&sifa->refcount, 1);
2529 if (resettotop == 0) {
2530 inp->next_addr_touse = NULL;
2531 goto once_again_too;
2534 * no address bound can be a source for the destination we are in
2542 static struct sctp_ifa *
2543 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2544 struct sctp_tcb *stcb,
2547 uint8_t dest_is_priv,
2548 uint8_t dest_is_loop,
2549 int non_asoc_addr_ok,
2552 struct sctp_laddr *laddr, *starting_point;
2554 struct sctp_ifn *sctp_ifn;
2555 struct sctp_ifa *sctp_ifa, *sifa;
2556 uint8_t start_at_beginning = 0;
2557 struct sctp_vrf *vrf;
2561 * first question, is the ifn we will emit on in our list, if so, we
2564 vrf = sctp_find_vrf(vrf_id);
2568 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2569 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2570 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2573 * first question, is the ifn we will emit on in our list? If so,
2574 * we want that one. First we look for a preferred. Second, we go
2575 * for an acceptable.
2578 /* first try for a preferred address on the ep */
2579 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2580 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2582 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2583 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2586 if (((non_asoc_addr_ok == 0) &&
2587 (sctp_is_addr_restricted(stcb, sifa))) ||
2588 (non_asoc_addr_ok &&
2589 (sctp_is_addr_restricted(stcb, sifa)) &&
2590 (!sctp_is_addr_pending(stcb, sifa)))) {
2591 /* on the no-no list */
2594 atomic_add_int(&sifa->refcount, 1);
2598 /* next try for an acceptable address on the ep */
2599 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2600 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2602 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2603 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2606 if (((non_asoc_addr_ok == 0) &&
2607 (sctp_is_addr_restricted(stcb, sifa))) ||
2608 (non_asoc_addr_ok &&
2609 (sctp_is_addr_restricted(stcb, sifa)) &&
2610 (!sctp_is_addr_pending(stcb, sifa)))) {
2611 /* on the no-no list */
2614 atomic_add_int(&sifa->refcount, 1);
2621 * if we can't find one like that then we must look at all addresses
2622 * bound to pick one at first preferable then secondly acceptable.
2624 starting_point = stcb->asoc.last_used_address;
2626 if (stcb->asoc.last_used_address == NULL) {
2627 start_at_beginning = 1;
2628 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2630 /* search beginning with the last used address */
2631 for (laddr = stcb->asoc.last_used_address; laddr;
2632 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2633 if (laddr->ifa == NULL) {
2634 /* address has been removed */
2637 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2638 /* address is being deleted */
2641 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2644 if (((non_asoc_addr_ok == 0) &&
2645 (sctp_is_addr_restricted(stcb, sifa))) ||
2646 (non_asoc_addr_ok &&
2647 (sctp_is_addr_restricted(stcb, sifa)) &&
2648 (!sctp_is_addr_pending(stcb, sifa)))) {
2649 /* on the no-no list */
2652 stcb->asoc.last_used_address = laddr;
2653 atomic_add_int(&sifa->refcount, 1);
2656 if (start_at_beginning == 0) {
2657 stcb->asoc.last_used_address = NULL;
2658 goto sctp_from_the_top;
2660 /* now try for any higher scope than the destination */
2661 stcb->asoc.last_used_address = starting_point;
2662 start_at_beginning = 0;
2664 if (stcb->asoc.last_used_address == NULL) {
2665 start_at_beginning = 1;
2666 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2668 /* search beginning with the last used address */
2669 for (laddr = stcb->asoc.last_used_address; laddr;
2670 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2671 if (laddr->ifa == NULL) {
2672 /* address has been removed */
2675 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2676 /* address is being deleted */
2679 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2683 if (((non_asoc_addr_ok == 0) &&
2684 (sctp_is_addr_restricted(stcb, sifa))) ||
2685 (non_asoc_addr_ok &&
2686 (sctp_is_addr_restricted(stcb, sifa)) &&
2687 (!sctp_is_addr_pending(stcb, sifa)))) {
2688 /* on the no-no list */
2691 stcb->asoc.last_used_address = laddr;
2692 atomic_add_int(&sifa->refcount, 1);
2695 if (start_at_beginning == 0) {
2696 stcb->asoc.last_used_address = NULL;
2697 goto sctp_from_the_top2;
2702 static struct sctp_ifa *
2703 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2704 struct sctp_tcb *stcb,
2705 int non_asoc_addr_ok,
2706 uint8_t dest_is_loop,
2707 uint8_t dest_is_priv,
2713 struct sctp_ifa *ifa, *sifa;
2714 int num_eligible_addr = 0;
2717 struct sockaddr_in6 sin6, lsa6;
2719 if (fam == AF_INET6) {
2720 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2721 (void)sa6_recoverscope(&sin6);
2724 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2725 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2726 (non_asoc_addr_ok == 0))
2728 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2733 if (fam == AF_INET6 &&
2735 sifa->src_is_loop && sifa->src_is_priv) {
2737 * don't allow fe80::1 to be a src on loop ::1, we
2738 * don't list it to the peer so we will get an
2743 if (fam == AF_INET6 &&
2744 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2745 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2747 * link-local <-> link-local must belong to the same
2750 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2751 (void)sa6_recoverscope(&lsa6);
2752 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2759 * Check if the IPv6 address matches to next-hop. In the
2760 * mobile case, old IPv6 address may be not deleted from the
2761 * interface. Then, the interface has previous and new
2762 * addresses. We should use one corresponding to the
2763 * next-hop. (by micchie)
2766 if (stcb && fam == AF_INET6 &&
2767 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2768 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2775 /* Avoid topologically incorrect IPv4 address */
2776 if (stcb && fam == AF_INET &&
2777 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2778 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2784 if (sctp_is_address_in_scope(ifa,
2785 stcb->asoc.ipv4_addr_legal,
2786 stcb->asoc.ipv6_addr_legal,
2787 stcb->asoc.loopback_scope,
2788 stcb->asoc.ipv4_local_scope,
2789 stcb->asoc.local_scope,
2790 stcb->asoc.site_scope, 0) == 0) {
2793 if (((non_asoc_addr_ok == 0) &&
2794 (sctp_is_addr_restricted(stcb, sifa))) ||
2795 (non_asoc_addr_ok &&
2796 (sctp_is_addr_restricted(stcb, sifa)) &&
2797 (!sctp_is_addr_pending(stcb, sifa)))) {
2799 * It is restricted for some reason..
2800 * probably not yet added.
2805 if (num_eligible_addr >= addr_wanted) {
2808 num_eligible_addr++;
2815 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2816 struct sctp_tcb *stcb,
2817 int non_asoc_addr_ok,
2818 uint8_t dest_is_loop,
2819 uint8_t dest_is_priv,
2822 struct sctp_ifa *ifa, *sifa;
2823 int num_eligible_addr = 0;
2825 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2826 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2827 (non_asoc_addr_ok == 0)) {
2830 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2836 if (sctp_is_address_in_scope(ifa,
2837 stcb->asoc.ipv4_addr_legal,
2838 stcb->asoc.ipv6_addr_legal,
2839 stcb->asoc.loopback_scope,
2840 stcb->asoc.ipv4_local_scope,
2841 stcb->asoc.local_scope,
2842 stcb->asoc.site_scope, 0) == 0) {
2845 if (((non_asoc_addr_ok == 0) &&
2846 (sctp_is_addr_restricted(stcb, sifa))) ||
2847 (non_asoc_addr_ok &&
2848 (sctp_is_addr_restricted(stcb, sifa)) &&
2849 (!sctp_is_addr_pending(stcb, sifa)))) {
2851 * It is restricted for some reason..
2852 * probably not yet added.
2857 num_eligible_addr++;
2859 return (num_eligible_addr);
2862 static struct sctp_ifa *
2863 sctp_choose_boundall(struct sctp_tcb *stcb,
2864 struct sctp_nets *net,
2867 uint8_t dest_is_priv,
2868 uint8_t dest_is_loop,
2869 int non_asoc_addr_ok,
2872 int cur_addr_num = 0, num_preferred = 0;
2874 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2875 struct sctp_ifa *sctp_ifa, *sifa;
2877 struct sctp_vrf *vrf;
2885 * For boundall we can use any address in the association.
2886 * If non_asoc_addr_ok is set we can use any address (at least in
2887 * theory). So we look for preferred addresses first. If we find one,
2888 * we use it. Otherwise we next try to get an address on the
2889 * interface, which we should be able to do (unless non_asoc_addr_ok
2890 * is false and we are routed out that way). In these cases where we
2891 * can't use the address of the interface we go through all the
2892 * ifn's looking for an address we can use and fill that in. Punting
2893 * means we send back address 0, which will probably cause problems
2894 * actually since then IP will fill in the address of the route ifn,
2895 * which means we probably already rejected it.. i.e. here comes an
2898 vrf = sctp_find_vrf(vrf_id);
2902 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2903 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2904 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2905 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2906 if (sctp_ifn == NULL) {
2907 /* ?? We don't have this guy ?? */
2908 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
2909 goto bound_all_plan_b;
2911 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
2912 ifn_index, sctp_ifn->ifn_name);
2915 cur_addr_num = net->indx_of_eligible_next_to_use;
2917 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
2922 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
2923 num_preferred, sctp_ifn->ifn_name);
2924 if (num_preferred == 0) {
2926 * no eligible addresses, we must use some other interface
2927 * address if we can find one.
2929 goto bound_all_plan_b;
2932 * Ok we have num_eligible_addr set with how many we can use, this
2933 * may vary from call to call due to addresses being deprecated
2936 if (cur_addr_num >= num_preferred) {
2940 * select the nth address from the list (where cur_addr_num is the
2941 * nth) and 0 is the first one, 1 is the second one etc...
2943 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
2945 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
2946 dest_is_priv, cur_addr_num, fam, ro);
2948 /* if sctp_ifa is NULL something changed??, fall to plan b. */
2950 atomic_add_int(&sctp_ifa->refcount, 1);
2952 /* save off where the next one we will want */
2953 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
2958 * plan_b: Look at all interfaces and find a preferred address. If
2959 * no preferred fall through to plan_c.
2962 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
2963 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2964 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
2965 sctp_ifn->ifn_name);
2966 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2967 /* wrong base scope */
2968 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
2971 if ((sctp_ifn == looked_at) && looked_at) {
2972 /* already looked at this guy */
2973 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
2976 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, stcb, non_asoc_addr_ok,
2977 dest_is_loop, dest_is_priv, fam);
2978 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2979 "Found ifn:%p %d preferred source addresses\n",
2980 ifn, num_preferred);
2981 if (num_preferred == 0) {
2982 /* None on this interface. */
2983 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n");
2986 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2987 "num preferred:%d on interface:%p cur_addr_num:%d\n",
2988 num_preferred, sctp_ifn, cur_addr_num);
2991 * Ok we have num_eligible_addr set with how many we can
2992 * use, this may vary from call to call due to addresses
2993 * being deprecated etc..
2995 if (cur_addr_num >= num_preferred) {
2998 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
2999 dest_is_priv, cur_addr_num, fam, ro);
3003 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3004 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3006 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3007 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3008 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3009 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3011 atomic_add_int(&sifa->refcount, 1);
3015 again_with_private_addresses_allowed:
3017 /* plan_c: do we have an acceptable address on the emit interface */
3019 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3020 if (emit_ifn == NULL) {
3021 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3024 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3025 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", sctp_ifa);
3026 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3027 (non_asoc_addr_ok == 0)) {
3028 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3031 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3034 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3038 if (sctp_is_address_in_scope(sifa,
3039 stcb->asoc.ipv4_addr_legal,
3040 stcb->asoc.ipv6_addr_legal,
3041 stcb->asoc.loopback_scope,
3042 stcb->asoc.ipv4_local_scope,
3043 stcb->asoc.local_scope,
3044 stcb->asoc.site_scope, 0) == 0) {
3045 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3049 if (((non_asoc_addr_ok == 0) &&
3050 (sctp_is_addr_restricted(stcb, sifa))) ||
3051 (non_asoc_addr_ok &&
3052 (sctp_is_addr_restricted(stcb, sifa)) &&
3053 (!sctp_is_addr_pending(stcb, sifa)))) {
3055 * It is restricted for some reason..
3056 * probably not yet added.
3058 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n");
3063 SCTP_PRINTF("Stcb is null - no print\n");
3065 atomic_add_int(&sifa->refcount, 1);
3070 * plan_d: We are in trouble. No preferred address on the emit
3071 * interface. And not even a preferred address on all interfaces. Go
3072 * out and see if we can find an acceptable address somewhere
3073 * amongst all interfaces.
3075 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", looked_at);
3076 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3077 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3078 /* wrong base scope */
3081 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3082 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3083 (non_asoc_addr_ok == 0))
3085 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3091 if (sctp_is_address_in_scope(sifa,
3092 stcb->asoc.ipv4_addr_legal,
3093 stcb->asoc.ipv6_addr_legal,
3094 stcb->asoc.loopback_scope,
3095 stcb->asoc.ipv4_local_scope,
3096 stcb->asoc.local_scope,
3097 stcb->asoc.site_scope, 0) == 0) {
3101 if (((non_asoc_addr_ok == 0) &&
3102 (sctp_is_addr_restricted(stcb, sifa))) ||
3103 (non_asoc_addr_ok &&
3104 (sctp_is_addr_restricted(stcb, sifa)) &&
3105 (!sctp_is_addr_pending(stcb, sifa)))) {
3107 * It is restricted for some
3108 * reason.. probably not yet added.
3118 if ((retried == 0) && (stcb->asoc.ipv4_local_scope == 0)) {
3119 stcb->asoc.ipv4_local_scope = 1;
3121 goto again_with_private_addresses_allowed;
3122 } else if (retried == 1) {
3123 stcb->asoc.ipv4_local_scope = 0;
3130 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3131 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3132 /* wrong base scope */
3135 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3136 struct sctp_ifa *tmp_sifa;
3138 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3139 (non_asoc_addr_ok == 0))
3141 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3144 if (tmp_sifa == NULL) {
3147 if (tmp_sifa == sifa) {
3151 if (sctp_is_address_in_scope(tmp_sifa,
3152 stcb->asoc.ipv4_addr_legal,
3153 stcb->asoc.ipv6_addr_legal,
3154 stcb->asoc.loopback_scope,
3155 stcb->asoc.ipv4_local_scope,
3156 stcb->asoc.local_scope,
3157 stcb->asoc.site_scope, 0) == 0) {
3160 if (((non_asoc_addr_ok == 0) &&
3161 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3162 (non_asoc_addr_ok &&
3163 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3164 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3174 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3175 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3176 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3181 atomic_add_int(&sifa->refcount, 1);
3189 /* tcb may be NULL */
3191 sctp_source_address_selection(struct sctp_inpcb *inp,
3192 struct sctp_tcb *stcb,
3194 struct sctp_nets *net,
3195 int non_asoc_addr_ok, uint32_t vrf_id)
3197 struct sctp_ifa *answer;
3198 uint8_t dest_is_priv, dest_is_loop;
3202 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3206 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3211 * Rules: - Find the route if needed, cache if I can. - Look at
3212 * interface address in route, Is it in the bound list. If so we
3213 * have the best source. - If not we must rotate amongst the
3218 * Do we need to pay attention to scope. We can have a private address
3219 * or a global address we are sourcing or sending to. So if we draw
3221 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3223 * ------------------------------------------
3224 * source * dest * result
3225 * -----------------------------------------
3226 * <a> Private * Global * NAT
3227 * -----------------------------------------
3228 * <b> Private * Private * No problem
3229 * -----------------------------------------
3230 * <c> Global * Private * Huh, How will this work?
3231 * -----------------------------------------
3232 * <d> Global * Global * No Problem
3233 *------------------------------------------
3234 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3236 *------------------------------------------
3237 * source * dest * result
3238 * -----------------------------------------
3239 * <a> Linklocal * Global *
3240 * -----------------------------------------
3241 * <b> Linklocal * Linklocal * No problem
3242 * -----------------------------------------
3243 * <c> Global * Linklocal * Huh, How will this work?
3244 * -----------------------------------------
3245 * <d> Global * Global * No Problem
3246 *------------------------------------------
3247 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3249 * And then we add to that what happens if there are multiple addresses
3250 * assigned to an interface. Remember the ifa on a ifn is a linked
3251 * list of addresses. So one interface can have more than one IP
3252 * address. What happens if we have both a private and a global
3253 * address? Do we then use context of destination to sort out which
3254 * one is best? And what about NAT's sending P->G may get you a NAT
3255 * translation, or should you select the G thats on the interface in
3260 * - count the number of addresses on the interface.
3261 * - if it is one, no problem except case <c>.
3262 * For <a> we will assume a NAT out there.
3263 * - if there are more than one, then we need to worry about scope P
3264 * or G. We should prefer G -> G and P -> P if possible.
3265 * Then as a secondary fall back to mixed types G->P being a last
3267 * - The above all works for bound all, but bound specific we need to
3268 * use the same concept but instead only consider the bound
3269 * addresses. If the bound set is NOT assigned to the interface then
3270 * we must use rotation amongst the bound addresses..
3272 if (ro->ro_rt == NULL) {
3274 * Need a route to cache.
3276 SCTP_RTALLOC(ro, vrf_id);
3278 if (ro->ro_rt == NULL) {
3281 fam = ro->ro_dst.sa_family;
3282 dest_is_priv = dest_is_loop = 0;
3283 /* Setup our scopes for the destination */
3287 /* Scope based on outbound address */
3288 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3291 /* mark it as local */
3292 net->addr_is_local = 1;
3294 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3301 /* Scope based on outbound address */
3302 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3303 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3305 * If the address is a loopback address, which
3306 * consists of "::1" OR "fe80::1%lo0", we are
3307 * loopback scope. But we don't use dest_is_priv
3308 * (link local addresses).
3312 /* mark it as local */
3313 net->addr_is_local = 1;
3315 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3321 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3322 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3323 SCTP_IPI_ADDR_RLOCK();
3324 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3328 answer = sctp_choose_boundall(stcb, net, ro, vrf_id,
3329 dest_is_priv, dest_is_loop,
3330 non_asoc_addr_ok, fam);
3331 SCTP_IPI_ADDR_RUNLOCK();
3338 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3339 vrf_id, dest_is_priv,
3341 non_asoc_addr_ok, fam);
3343 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3348 SCTP_IPI_ADDR_RUNLOCK();
3353 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3356 int tlen, at, found;
3357 struct sctp_sndinfo sndinfo;
3358 struct sctp_prinfo prinfo;
3359 struct sctp_authinfo authinfo;
3361 tlen = SCTP_BUF_LEN(control);
3365 * Independent of how many mbufs, find the c_type inside the control
3366 * structure and copy out the data.
3369 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3370 /* There is not enough room for one more. */
3373 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3374 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(struct cmsghdr))) {
3375 /* We dont't have a complete CMSG header. */
3378 if (((int)cmh.cmsg_len + at) > tlen) {
3379 /* We don't have the complete CMSG. */
3382 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3383 ((c_type == cmh.cmsg_type) ||
3384 ((c_type == SCTP_SNDRCV) &&
3385 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3386 (cmh.cmsg_type == SCTP_PRINFO) ||
3387 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3388 if (c_type == cmh.cmsg_type) {
3389 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < cpsize) {
3392 /* It is exactly what we want. Copy it out. */
3393 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), cpsize, (caddr_t)data);
3396 struct sctp_sndrcvinfo *sndrcvinfo;
3398 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3400 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3403 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3405 switch (cmh.cmsg_type) {
3407 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_sndinfo)) {
3410 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3411 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3412 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3413 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3414 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3415 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3418 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_prinfo)) {
3421 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3422 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3423 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3426 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_authinfo)) {
3429 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3430 sndrcvinfo->sinfo_keynumber_valid = 1;
3431 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3439 at += CMSG_ALIGN(cmh.cmsg_len);
3445 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3449 struct sctp_initmsg initmsg;
3452 struct sockaddr_in sin;
3456 struct sockaddr_in6 sin6;
3460 tlen = SCTP_BUF_LEN(control);
3463 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3464 /* There is not enough room for one more. */
3468 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3469 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(struct cmsghdr))) {
3470 /* We dont't have a complete CMSG header. */
3474 if (((int)cmh.cmsg_len + at) > tlen) {
3475 /* We don't have the complete CMSG. */
3479 if (cmh.cmsg_level == IPPROTO_SCTP) {
3480 switch (cmh.cmsg_type) {
3482 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_initmsg)) {
3486 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3487 if (initmsg.sinit_max_attempts)
3488 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3489 if (initmsg.sinit_num_ostreams)
3490 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3491 if (initmsg.sinit_max_instreams)
3492 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3493 if (initmsg.sinit_max_init_timeo)
3494 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3495 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3496 struct sctp_stream_out *tmp_str;
3499 /* Default is NOT correct */
3500 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3501 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3502 SCTP_TCB_UNLOCK(stcb);
3503 SCTP_MALLOC(tmp_str,
3504 struct sctp_stream_out *,
3505 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3507 SCTP_TCB_LOCK(stcb);
3508 if (tmp_str != NULL) {
3509 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3510 stcb->asoc.strmout = tmp_str;
3511 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3513 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3515 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3516 stcb->asoc.strmout[i].next_sequence_sent = 0;
3517 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3518 stcb->asoc.strmout[i].stream_no = i;
3519 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3520 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3525 case SCTP_DSTADDRV4:
3526 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in_addr)) {
3530 memset(&sin, 0, sizeof(struct sockaddr_in));
3531 sin.sin_family = AF_INET;
3532 sin.sin_len = sizeof(struct sockaddr_in);
3533 sin.sin_port = stcb->rport;
3534 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3535 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3536 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3537 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3541 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3542 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3549 case SCTP_DSTADDRV6:
3550 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in6_addr)) {
3554 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3555 sin6.sin6_family = AF_INET6;
3556 sin6.sin6_len = sizeof(struct sockaddr_in6);
3557 sin6.sin6_port = stcb->rport;
3558 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3559 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3560 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3565 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3566 in6_sin6_2_sin(&sin, &sin6);
3567 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3568 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3569 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3573 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3574 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3580 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
3581 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3591 at += CMSG_ALIGN(cmh.cmsg_len);
3596 static struct sctp_tcb *
3597 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3599 struct mbuf *control,
3600 struct sctp_nets **net_p,
3605 struct sctp_tcb *stcb;
3606 struct sockaddr *addr;
3609 struct sockaddr_in sin;
3613 struct sockaddr_in6 sin6;
3617 tlen = SCTP_BUF_LEN(control);
3620 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3621 /* There is not enough room for one more. */
3625 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3626 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(struct cmsghdr))) {
3627 /* We dont't have a complete CMSG header. */
3631 if (((int)cmh.cmsg_len + at) > tlen) {
3632 /* We don't have the complete CMSG. */
3636 if (cmh.cmsg_level == IPPROTO_SCTP) {
3637 switch (cmh.cmsg_type) {
3639 case SCTP_DSTADDRV4:
3640 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in_addr)) {
3644 memset(&sin, 0, sizeof(struct sockaddr_in));
3645 sin.sin_family = AF_INET;
3646 sin.sin_len = sizeof(struct sockaddr_in);
3647 sin.sin_port = port;
3648 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3649 addr = (struct sockaddr *)&sin;
3653 case SCTP_DSTADDRV6:
3654 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in6_addr)) {
3658 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3659 sin6.sin6_family = AF_INET6;
3660 sin6.sin6_len = sizeof(struct sockaddr_in6);
3661 sin6.sin6_port = port;
3662 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3664 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3665 in6_sin6_2_sin(&sin, &sin6);
3666 addr = (struct sockaddr *)&sin;
3669 addr = (struct sockaddr *)&sin6;
3677 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3683 at += CMSG_ALIGN(cmh.cmsg_len);
3688 static struct mbuf *
3689 sctp_add_cookie(struct mbuf *init, int init_offset,
3690 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3692 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3693 struct sctp_state_cookie *stc;
3694 struct sctp_paramhdr *ph;
3700 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3701 sizeof(struct sctp_paramhdr)), 0,
3702 M_DONTWAIT, 1, MT_DATA);
3706 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_DONTWAIT);
3707 if (copy_init == NULL) {
3711 #ifdef SCTP_MBUF_LOGGING
3712 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3715 for (mat = copy_init; mat; mat = SCTP_BUF_NEXT(mat)) {
3716 if (SCTP_BUF_IS_EXTENDED(mat)) {
3717 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3722 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3724 if (copy_initack == NULL) {
3726 sctp_m_freem(copy_init);
3729 #ifdef SCTP_MBUF_LOGGING
3730 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3733 for (mat = copy_initack; mat; mat = SCTP_BUF_NEXT(mat)) {
3734 if (SCTP_BUF_IS_EXTENDED(mat)) {
3735 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3740 /* easy side we just drop it on the end */
3741 ph = mtod(mret, struct sctp_paramhdr *);
3742 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3743 sizeof(struct sctp_paramhdr);
3744 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3745 sizeof(struct sctp_paramhdr));
3746 ph->param_type = htons(SCTP_STATE_COOKIE);
3747 ph->param_length = 0; /* fill in at the end */
3748 /* Fill in the stc cookie data */
3749 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3751 /* tack the INIT and then the INIT-ACK onto the chain */
3753 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3754 cookie_sz += SCTP_BUF_LEN(m_at);
3755 if (SCTP_BUF_NEXT(m_at) == NULL) {
3756 SCTP_BUF_NEXT(m_at) = copy_init;
3760 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3761 cookie_sz += SCTP_BUF_LEN(m_at);
3762 if (SCTP_BUF_NEXT(m_at) == NULL) {
3763 SCTP_BUF_NEXT(m_at) = copy_initack;
3767 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3768 cookie_sz += SCTP_BUF_LEN(m_at);
3769 if (SCTP_BUF_NEXT(m_at) == NULL) {
3773 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_DONTWAIT, 1, MT_DATA);
3775 /* no space, so free the entire chain */
3779 SCTP_BUF_LEN(sig) = 0;
3780 SCTP_BUF_NEXT(m_at) = sig;
3782 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3783 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3785 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3786 cookie_sz += SCTP_SIGNATURE_SIZE;
3787 ph->param_length = htons(cookie_sz);
3793 sctp_get_ect(struct sctp_tcb *stcb)
3795 if ((stcb != NULL) && (stcb->asoc.ecn_allowed == 1)) {
3796 return (SCTP_ECT0_BIT);
3803 sctp_handle_no_route(struct sctp_tcb *stcb,
3804 struct sctp_nets *net,
3807 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3810 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3811 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3812 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3813 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3814 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", net);
3815 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3819 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3820 net->dest_state &= ~SCTP_ADDR_PF;
3824 if (net == stcb->asoc.primary_destination) {
3825 /* need a new primary */
3826 struct sctp_nets *alt;
3828 alt = sctp_find_alternate_net(stcb, net, 0);
3830 if (stcb->asoc.alternate) {
3831 sctp_free_remote_addr(stcb->asoc.alternate);
3833 stcb->asoc.alternate = alt;
3834 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3835 if (net->ro._s_addr) {
3836 sctp_free_ifa(net->ro._s_addr);
3837 net->ro._s_addr = NULL;
3839 net->src_addr_selected = 0;
3847 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3848 struct sctp_tcb *stcb, /* may be NULL */
3849 struct sctp_nets *net,
3850 struct sockaddr *to,
3852 uint32_t auth_offset,
3853 struct sctp_auth_chunk *auth,
3854 uint16_t auth_keyid,
3855 int nofragment_flag,
3862 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3863 int so_locked SCTP_UNUSED,
3867 union sctp_sockstore *over_addr,
3870 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3873 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3874 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3875 * - fill in the HMAC digest of any AUTH chunk in the packet.
3876 * - calculate and fill in the SCTP checksum.
3877 * - prepend an IP address header.
3878 * - if boundall use INADDR_ANY.
3879 * - if boundspecific do source address selection.
3880 * - set fragmentation option for ipV4.
3881 * - On return from IP output, check/adjust mtu size of output
3882 * interface and smallest_mtu size as well.
3884 /* Will need ifdefs around this */
3887 struct sctphdr *sctphdr;
3891 sctp_route_t *ro = NULL;
3892 struct udphdr *udp = NULL;
3895 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3896 struct socket *so = NULL;
3900 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
3901 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
3906 vrf_id = stcb->asoc.vrf_id;
3908 vrf_id = inp->def_vrf_id;
3911 /* fill in the HMAC digest for any AUTH chunk in the packet */
3912 if ((auth != NULL) && (stcb != NULL)) {
3913 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
3916 tos_value = net->dscp;
3918 tos_value = stcb->asoc.default_dscp;
3920 tos_value = inp->sctp_ep.default_dscp;
3923 switch (to->sa_family) {
3927 struct ip *ip = NULL;
3928 sctp_route_t iproute;
3931 len = sizeof(struct ip) + sizeof(struct sctphdr);
3933 len += sizeof(struct udphdr);
3935 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
3938 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
3941 SCTP_ALIGN_TO_END(newm, len);
3942 SCTP_BUF_LEN(newm) = len;
3943 SCTP_BUF_NEXT(newm) = m;
3947 if (net->flowidset == 0) {
3948 panic("Flow ID not set");
3951 m->m_pkthdr.flowid = net->flowid;
3952 m->m_flags |= M_FLOWID;
3954 if ((init != NULL) && (init->m_flags & M_FLOWID)) {
3955 m->m_pkthdr.flowid = init->m_pkthdr.flowid;
3956 m->m_flags |= M_FLOWID;
3959 packet_length = sctp_calculate_len(m);
3960 ip = mtod(m, struct ip *);
3961 ip->ip_v = IPVERSION;
3962 ip->ip_hl = (sizeof(struct ip) >> 2);
3963 if (tos_value == 0) {
3965 * This means especially, that it is not set
3966 * at the SCTP layer. So use the value from
3969 tos_value = inp->ip_inp.inp.inp_ip_tos;
3973 tos_value |= sctp_get_ect(stcb);
3975 if ((nofragment_flag) && (port == 0)) {
3980 /* FreeBSD has a function for ip_id's */
3981 ip->ip_id = ip_newid();
3983 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
3984 ip->ip_len = packet_length;
3985 ip->ip_tos = tos_value;
3987 ip->ip_p = IPPROTO_UDP;
3989 ip->ip_p = IPPROTO_SCTP;
3994 memset(&iproute, 0, sizeof(iproute));
3995 memcpy(&ro->ro_dst, to, to->sa_len);
3997 ro = (sctp_route_t *) & net->ro;
3999 /* Now the address selection part */
4000 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4002 /* call the routine to select the src address */
4003 if (net && out_of_asoc_ok == 0) {
4004 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4005 sctp_free_ifa(net->ro._s_addr);
4006 net->ro._s_addr = NULL;
4007 net->src_addr_selected = 0;
4013 if (net->src_addr_selected == 0) {
4014 /* Cache the source address */
4015 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4018 net->src_addr_selected = 1;
4020 if (net->ro._s_addr == NULL) {
4021 /* No route to host */
4022 net->src_addr_selected = 0;
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 = net->ro._s_addr->address.sin.sin_addr;
4030 if (over_addr == NULL) {
4031 struct sctp_ifa *_lsrc;
4033 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4037 if (_lsrc == NULL) {
4038 sctp_handle_no_route(stcb, net, so_locked);
4039 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4041 return (EHOSTUNREACH);
4043 ip->ip_src = _lsrc->address.sin.sin_addr;
4044 sctp_free_ifa(_lsrc);
4046 ip->ip_src = over_addr->sin.sin_addr;
4047 SCTP_RTALLOC(ro, vrf_id);
4051 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4052 sctp_handle_no_route(stcb, net, so_locked);
4053 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4055 return (EHOSTUNREACH);
4057 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4058 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4059 udp->uh_dport = port;
4060 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4062 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4066 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4068 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4071 sctphdr->src_port = src_port;
4072 sctphdr->dest_port = dest_port;
4073 sctphdr->v_tag = v_tag;
4074 sctphdr->checksum = 0;
4077 * If source address selection fails and we find no
4078 * route then the ip_output should fail as well with
4079 * a NO_ROUTE_TO_HOST type error. We probably should
4080 * catch that somewhere and abort the association
4081 * right away (assuming this is an INIT being sent).
4083 if (ro->ro_rt == NULL) {
4085 * src addr selection failed to find a route
4086 * (or valid source addr), so we can't get
4087 * there from here (yet)!
4089 sctp_handle_no_route(stcb, net, so_locked);
4090 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4092 return (EHOSTUNREACH);
4094 if (ro != &iproute) {
4095 memcpy(&iproute, ro, sizeof(*ro));
4097 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4098 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4099 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4100 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4101 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4104 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4105 /* failed to prepend data, give up */
4106 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4110 #ifdef SCTP_PACKET_LOGGING
4111 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4112 sctp_packet_log(m, packet_length);
4114 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4116 #if defined(SCTP_WITH_NO_CSUM)
4117 SCTP_STAT_INCR(sctps_sendnocrc);
4119 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
4121 (stcb->asoc.loopback_scope))) {
4122 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4123 SCTP_STAT_INCR(sctps_sendswcrc);
4125 SCTP_STAT_INCR(sctps_sendnocrc);
4129 SCTP_ENABLE_UDP_CSUM(o_pak);
4132 #if defined(SCTP_WITH_NO_CSUM)
4133 SCTP_STAT_INCR(sctps_sendnocrc);
4135 m->m_pkthdr.csum_flags = CSUM_SCTP;
4136 m->m_pkthdr.csum_data = 0;
4137 SCTP_STAT_INCR(sctps_sendhwcrc);
4140 /* send it out. table id is taken from stcb */
4141 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4142 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4143 so = SCTP_INP_SO(inp);
4144 SCTP_SOCKET_UNLOCK(so, 0);
4147 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4148 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4149 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4150 atomic_add_int(&stcb->asoc.refcnt, 1);
4151 SCTP_TCB_UNLOCK(stcb);
4152 SCTP_SOCKET_LOCK(so, 0);
4153 SCTP_TCB_LOCK(stcb);
4154 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4157 SCTP_STAT_INCR(sctps_sendpackets);
4158 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4160 SCTP_STAT_INCR(sctps_senderrors);
4162 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4164 /* free tempy routes */
4171 * PMTU check versus smallest asoc MTU goes
4174 if ((ro->ro_rt != NULL) &&
4175 (net->ro._s_addr)) {
4178 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4180 mtu -= sizeof(struct udphdr);
4182 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4183 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4186 } else if (ro->ro_rt == NULL) {
4187 /* route was freed */
4188 if (net->ro._s_addr &&
4189 net->src_addr_selected) {
4190 sctp_free_ifa(net->ro._s_addr);
4191 net->ro._s_addr = NULL;
4193 net->src_addr_selected = 0;
4202 uint32_t flowlabel, flowinfo;
4203 struct ip6_hdr *ip6h;
4204 struct route_in6 ip6route;
4206 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4208 struct sockaddr_in6 lsa6_storage;
4210 u_short prev_port = 0;
4214 flowlabel = net->flowlabel;
4216 flowlabel = stcb->asoc.default_flowlabel;
4218 flowlabel = inp->sctp_ep.default_flowlabel;
4220 if (flowlabel == 0) {
4222 * This means especially, that it is not set
4223 * at the SCTP layer. So use the value from
4226 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4228 flowlabel &= 0x000fffff;
4229 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
4231 len += sizeof(struct udphdr);
4233 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
4236 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4239 SCTP_ALIGN_TO_END(newm, len);
4240 SCTP_BUF_LEN(newm) = len;
4241 SCTP_BUF_NEXT(newm) = m;
4245 if (net->flowidset == 0) {
4246 panic("Flow ID not set");
4249 m->m_pkthdr.flowid = net->flowid;
4250 m->m_flags |= M_FLOWID;
4252 if ((init != NULL) && (init->m_flags & M_FLOWID)) {
4253 m->m_pkthdr.flowid = init->m_pkthdr.flowid;
4254 m->m_flags |= M_FLOWID;
4257 packet_length = sctp_calculate_len(m);
4259 ip6h = mtod(m, struct ip6_hdr *);
4260 /* protect *sin6 from overwrite */
4261 sin6 = (struct sockaddr_in6 *)to;
4265 /* KAME hack: embed scopeid */
4266 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4267 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4271 memset(&ip6route, 0, sizeof(ip6route));
4272 ro = (sctp_route_t *) & ip6route;
4273 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4275 ro = (sctp_route_t *) & net->ro;
4278 * We assume here that inp_flow is in host byte
4279 * order within the TCB!
4281 if (tos_value == 0) {
4283 * This means especially, that it is not set
4284 * at the SCTP layer. So use the value from
4287 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4291 tos_value |= sctp_get_ect(stcb);
4295 flowinfo |= tos_value;
4297 flowinfo |= flowlabel;
4298 ip6h->ip6_flow = htonl(flowinfo);
4300 ip6h->ip6_nxt = IPPROTO_UDP;
4302 ip6h->ip6_nxt = IPPROTO_SCTP;
4304 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4305 ip6h->ip6_dst = sin6->sin6_addr;
4308 * Add SRC address selection here: we can only reuse
4309 * to a limited degree the kame src-addr-sel, since
4310 * we can try their selection but it may not be
4313 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4314 lsa6_tmp.sin6_family = AF_INET6;
4315 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4317 if (net && out_of_asoc_ok == 0) {
4318 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4319 sctp_free_ifa(net->ro._s_addr);
4320 net->ro._s_addr = NULL;
4321 net->src_addr_selected = 0;
4327 if (net->src_addr_selected == 0) {
4328 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4329 /* KAME hack: embed scopeid */
4330 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4331 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4334 /* Cache the source address */
4335 net->ro._s_addr = sctp_source_address_selection(inp,
4341 (void)sa6_recoverscope(sin6);
4342 net->src_addr_selected = 1;
4344 if (net->ro._s_addr == NULL) {
4345 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4346 net->src_addr_selected = 0;
4347 sctp_handle_no_route(stcb, net, so_locked);
4348 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4350 return (EHOSTUNREACH);
4352 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4354 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4355 /* KAME hack: embed scopeid */
4356 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4357 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4360 if (over_addr == NULL) {
4361 struct sctp_ifa *_lsrc;
4363 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4367 if (_lsrc == NULL) {
4368 sctp_handle_no_route(stcb, net, so_locked);
4369 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4371 return (EHOSTUNREACH);
4373 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4374 sctp_free_ifa(_lsrc);
4376 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4377 SCTP_RTALLOC(ro, vrf_id);
4379 (void)sa6_recoverscope(sin6);
4381 lsa6->sin6_port = inp->sctp_lport;
4383 if (ro->ro_rt == NULL) {
4385 * src addr selection failed to find a route
4386 * (or valid source addr), so we can't get
4389 sctp_handle_no_route(stcb, net, so_locked);
4390 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4392 return (EHOSTUNREACH);
4395 * XXX: sa6 may not have a valid sin6_scope_id in
4396 * the non-SCOPEDROUTING case.
4398 bzero(&lsa6_storage, sizeof(lsa6_storage));
4399 lsa6_storage.sin6_family = AF_INET6;
4400 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4401 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4402 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4403 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4408 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4409 lsa6_storage.sin6_port = inp->sctp_lport;
4410 lsa6 = &lsa6_storage;
4411 ip6h->ip6_src = lsa6->sin6_addr;
4414 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4415 sctp_handle_no_route(stcb, net, so_locked);
4416 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4418 return (EHOSTUNREACH);
4420 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4421 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4422 udp->uh_dport = port;
4423 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4425 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4427 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4430 sctphdr->src_port = src_port;
4431 sctphdr->dest_port = dest_port;
4432 sctphdr->v_tag = v_tag;
4433 sctphdr->checksum = 0;
4436 * We set the hop limit now since there is a good
4437 * chance that our ro pointer is now filled
4439 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4440 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4443 /* Copy to be sure something bad is not happening */
4444 sin6->sin6_addr = ip6h->ip6_dst;
4445 lsa6->sin6_addr = ip6h->ip6_src;
4448 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4449 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4450 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4451 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4452 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4454 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4456 * preserve the port and scope for link
4459 prev_scope = sin6->sin6_scope_id;
4460 prev_port = sin6->sin6_port;
4462 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4463 /* failed to prepend data, give up */
4465 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4468 #ifdef SCTP_PACKET_LOGGING
4469 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4470 sctp_packet_log(m, packet_length);
4472 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4474 #if defined(SCTP_WITH_NO_CSUM)
4475 SCTP_STAT_INCR(sctps_sendnocrc);
4477 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
4479 (stcb->asoc.loopback_scope))) {
4480 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4481 SCTP_STAT_INCR(sctps_sendswcrc);
4483 SCTP_STAT_INCR(sctps_sendnocrc);
4486 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4487 udp->uh_sum = 0xffff;
4490 #if defined(SCTP_WITH_NO_CSUM)
4491 SCTP_STAT_INCR(sctps_sendnocrc);
4493 m->m_pkthdr.csum_flags = CSUM_SCTP;
4494 m->m_pkthdr.csum_data = 0;
4495 SCTP_STAT_INCR(sctps_sendhwcrc);
4498 /* send it out. table id is taken from stcb */
4499 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4500 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4501 so = SCTP_INP_SO(inp);
4502 SCTP_SOCKET_UNLOCK(so, 0);
4505 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4506 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4507 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4508 atomic_add_int(&stcb->asoc.refcnt, 1);
4509 SCTP_TCB_UNLOCK(stcb);
4510 SCTP_SOCKET_LOCK(so, 0);
4511 SCTP_TCB_LOCK(stcb);
4512 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4516 /* for link local this must be done */
4517 sin6->sin6_scope_id = prev_scope;
4518 sin6->sin6_port = prev_port;
4520 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4521 SCTP_STAT_INCR(sctps_sendpackets);
4522 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4524 SCTP_STAT_INCR(sctps_senderrors);
4527 /* Now if we had a temp route free it */
4533 * PMTU check versus smallest asoc MTU goes
4536 if (ro->ro_rt == NULL) {
4537 /* Route was freed */
4538 if (net->ro._s_addr &&
4539 net->src_addr_selected) {
4540 sctp_free_ifa(net->ro._s_addr);
4541 net->ro._s_addr = NULL;
4543 net->src_addr_selected = 0;
4545 if ((ro->ro_rt != NULL) &&
4546 (net->ro._s_addr)) {
4549 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4551 (stcb->asoc.smallest_mtu > mtu)) {
4552 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4555 net->mtu -= sizeof(struct udphdr);
4559 if (ND_IFINFO(ifp)->linkmtu &&
4560 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4561 sctp_mtu_size_reset(inp,
4563 ND_IFINFO(ifp)->linkmtu);
4571 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4572 ((struct sockaddr *)to)->sa_family);
4574 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4581 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4582 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4587 struct mbuf *m, *m_at, *mp_last;
4588 struct sctp_nets *net;
4589 struct sctp_init_chunk *init;
4590 struct sctp_supported_addr_param *sup_addr;
4591 struct sctp_adaptation_layer_indication *ali;
4592 struct sctp_ecn_supported_param *ecn;
4593 struct sctp_prsctp_supported_param *prsctp;
4594 struct sctp_supported_chunk_types_param *pr_supported;
4595 int cnt_inits_to = 0;
4600 /* INIT's always go to the primary (and usually ONLY address) */
4602 net = stcb->asoc.primary_destination;
4604 net = TAILQ_FIRST(&stcb->asoc.nets);
4609 /* we confirm any address we send an INIT to */
4610 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4611 (void)sctp_set_primary_addr(stcb, NULL, net);
4613 /* we confirm any address we send an INIT to */
4614 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4616 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4618 if (((struct sockaddr *)&(net->ro._l_addr))->sa_family == AF_INET6) {
4620 * special hook, if we are sending to link local it will not
4621 * show up in our private address count.
4623 struct sockaddr_in6 *sin6l;
4625 sin6l = &net->ro._l_addr.sin6;
4626 if (IN6_IS_ADDR_LINKLOCAL(&sin6l->sin6_addr))
4630 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4631 /* This case should not happen */
4632 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4635 /* start the INIT timer */
4636 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4638 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA);
4640 /* No memory, INIT timer will re-attempt. */
4641 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4644 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
4646 * assume peer supports asconf in order to be able to queue local
4647 * address changes while an INIT is in flight and before the assoc
4650 stcb->asoc.peer_supports_asconf = 1;
4651 /* Now lets put the SCTP header in place */
4652 init = mtod(m, struct sctp_init_chunk *);
4653 /* now the chunk header */
4654 init->ch.chunk_type = SCTP_INITIATION;
4655 init->ch.chunk_flags = 0;
4656 /* fill in later from mbuf we build */
4657 init->ch.chunk_length = 0;
4658 /* place in my tag */
4659 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4660 /* set up some of the credits. */
4661 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4662 SCTP_MINIMAL_RWND));
4664 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4665 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4666 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4667 /* now the address restriction */
4668 /* XXX Should we take the address family of the socket into account? */
4669 sup_addr = (struct sctp_supported_addr_param *)((caddr_t)init +
4671 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4674 /* we support 2 types: IPv4/IPv6 */
4675 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + 2 * sizeof(uint16_t));
4676 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
4677 sup_addr->addr_type[1] = htons(SCTP_IPV6_ADDRESS);
4679 /* we support 1 type: IPv6 */
4680 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + sizeof(uint16_t));
4681 sup_addr->addr_type[0] = htons(SCTP_IPV6_ADDRESS);
4682 sup_addr->addr_type[1] = htons(0); /* this is the padding */
4685 /* we support 1 type: IPv4 */
4686 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + sizeof(uint16_t));
4687 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
4688 sup_addr->addr_type[1] = htons(0); /* this is the padding */
4690 SCTP_BUF_LEN(m) += sizeof(struct sctp_supported_addr_param);
4691 /* adaptation layer indication parameter */
4692 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)sup_addr + sizeof(struct sctp_supported_addr_param));
4693 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4694 ali->ph.param_length = htons(sizeof(*ali));
4695 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
4696 SCTP_BUF_LEN(m) += sizeof(*ali);
4697 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
4699 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4700 /* Add NAT friendly parameter */
4701 struct sctp_paramhdr *ph;
4703 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4704 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4705 ph->param_length = htons(sizeof(struct sctp_paramhdr));
4706 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
4707 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ph + sizeof(*ph));
4709 /* now any cookie time extensions */
4710 if (stcb->asoc.cookie_preserve_req) {
4711 struct sctp_cookie_perserve_param *cookie_preserve;
4713 cookie_preserve = (struct sctp_cookie_perserve_param *)(ecn);
4714 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4715 cookie_preserve->ph.param_length = htons(
4716 sizeof(*cookie_preserve));
4717 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4718 SCTP_BUF_LEN(m) += sizeof(*cookie_preserve);
4719 ecn = (struct sctp_ecn_supported_param *)(
4720 (caddr_t)cookie_preserve + sizeof(*cookie_preserve));
4721 stcb->asoc.cookie_preserve_req = 0;
4724 if (stcb->asoc.ecn_allowed == 1) {
4725 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
4726 ecn->ph.param_length = htons(sizeof(*ecn));
4727 SCTP_BUF_LEN(m) += sizeof(*ecn);
4728 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
4731 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
4733 /* And now tell the peer we do pr-sctp */
4734 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
4735 prsctp->ph.param_length = htons(sizeof(*prsctp));
4736 SCTP_BUF_LEN(m) += sizeof(*prsctp);
4738 /* And now tell the peer we do all the extensions */
4739 pr_supported = (struct sctp_supported_chunk_types_param *)
4740 ((caddr_t)prsctp + sizeof(*prsctp));
4741 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4743 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4744 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4745 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4746 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4747 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4748 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4749 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4751 if (stcb->asoc.sctp_nr_sack_on_off == 1) {
4752 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4754 p_len = sizeof(*pr_supported) + num_ext;
4755 pr_supported->ph.param_length = htons(p_len);
4756 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
4757 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4760 /* add authentication parameters */
4761 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4762 struct sctp_auth_random *randp;
4763 struct sctp_auth_hmac_algo *hmacs;
4764 struct sctp_auth_chunk_list *chunks;
4766 /* attach RANDOM parameter, if available */
4767 if (stcb->asoc.authinfo.random != NULL) {
4768 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4769 p_len = sizeof(*randp) + stcb->asoc.authinfo.random_len;
4770 /* random key already contains the header */
4771 bcopy(stcb->asoc.authinfo.random->key, randp, p_len);
4772 /* zero out any padding required */
4773 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
4774 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4776 /* add HMAC_ALGO parameter */
4777 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4778 p_len = sctp_serialize_hmaclist(stcb->asoc.local_hmacs,
4779 (uint8_t *) hmacs->hmac_ids);
4781 p_len += sizeof(*hmacs);
4782 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4783 hmacs->ph.param_length = htons(p_len);
4784 /* zero out any padding required */
4785 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
4786 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4788 /* add CHUNKS parameter */
4789 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4790 p_len = sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks,
4791 chunks->chunk_types);
4793 p_len += sizeof(*chunks);
4794 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4795 chunks->ph.param_length = htons(p_len);
4796 /* zero out any padding required */
4797 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
4798 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4801 /* now the addresses */
4803 struct sctp_scoping scp;
4806 * To optimize this we could put the scoping stuff into a
4807 * structure and remove the individual uint8's from the
4808 * assoc structure. Then we could just sifa in the address
4809 * within the stcb. But for now this is a quick hack to get
4810 * the address stuff teased apart.
4813 scp.ipv4_addr_legal = stcb->asoc.ipv4_addr_legal;
4814 scp.ipv6_addr_legal = stcb->asoc.ipv6_addr_legal;
4815 scp.loopback_scope = stcb->asoc.loopback_scope;
4816 scp.ipv4_local_scope = stcb->asoc.ipv4_local_scope;
4817 scp.local_scope = stcb->asoc.local_scope;
4818 scp.site_scope = stcb->asoc.site_scope;
4820 sctp_add_addresses_to_i_ia(inp, stcb, &scp, m, cnt_inits_to);
4823 /* calulate the size and update pkt header and chunk header */
4825 for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
4826 if (SCTP_BUF_NEXT(m_at) == NULL)
4828 p_len += SCTP_BUF_LEN(m_at);
4830 init->ch.chunk_length = htons(p_len);
4832 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
4833 * here since the timer will drive a retranmission.
4836 /* I don't expect this to execute but we will be safe here */
4838 if ((padval) && (mp_last)) {
4840 * The compiler worries that mp_last may not be set even
4841 * though I think it is impossible :-> however we add
4842 * mp_last here just in case.
4844 ret = sctp_add_pad_tombuf(mp_last, (4 - padval));
4846 /* Houston we have a problem, no space */
4851 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4852 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4853 (struct sockaddr *)&net->ro._l_addr,
4854 m, 0, NULL, 0, 0, 0, 0,
4855 inp->sctp_lport, stcb->rport, htonl(0),
4856 net->port, so_locked, NULL, NULL);
4857 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4858 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4859 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4863 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4864 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4867 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4868 * being equal to the beginning of the params i.e. (iphlen +
4869 * sizeof(struct sctp_init_msg) parse through the parameters to the
4870 * end of the mbuf verifying that all parameters are known.
4872 * For unknown parameters build and return a mbuf with
4873 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4874 * processing this chunk stop, and set *abort_processing to 1.
4876 * By having param_offset be pre-set to where parameters begin it is
4877 * hoped that this routine may be reused in the future by new
4880 struct sctp_paramhdr *phdr, params;
4882 struct mbuf *mat, *op_err;
4883 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4884 int at, limit, pad_needed;
4885 uint16_t ptype, plen, padded_size;
4888 *abort_processing = 0;
4891 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4894 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4895 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4896 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4897 ptype = ntohs(phdr->param_type);
4898 plen = ntohs(phdr->param_length);
4899 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4900 /* wacked parameter */
4901 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4904 limit -= SCTP_SIZE32(plen);
4906 * All parameters for all chunks that we know/understand are
4907 * listed here. We process them other places and make
4908 * appropriate stop actions per the upper bits. However this
4909 * is the generic routine processor's can call to get back
4910 * an operr.. to either incorporate (init-ack) or send.
4912 padded_size = SCTP_SIZE32(plen);
4914 /* Param's with variable size */
4915 case SCTP_HEARTBEAT_INFO:
4916 case SCTP_STATE_COOKIE:
4917 case SCTP_UNRECOG_PARAM:
4918 case SCTP_ERROR_CAUSE_IND:
4922 /* Param's with variable size within a range */
4923 case SCTP_CHUNK_LIST:
4924 case SCTP_SUPPORTED_CHUNK_EXT:
4925 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
4926 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
4931 case SCTP_SUPPORTED_ADDRTYPE:
4932 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
4933 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
4939 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
4940 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
4945 case SCTP_SET_PRIM_ADDR:
4946 case SCTP_DEL_IP_ADDRESS:
4947 case SCTP_ADD_IP_ADDRESS:
4948 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
4949 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
4950 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
4955 /* Param's with a fixed size */
4956 case SCTP_IPV4_ADDRESS:
4957 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
4958 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
4963 case SCTP_IPV6_ADDRESS:
4964 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
4965 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
4970 case SCTP_COOKIE_PRESERVE:
4971 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
4972 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
4977 case SCTP_HAS_NAT_SUPPORT:
4980 case SCTP_PRSCTP_SUPPORTED:
4982 if (padded_size != sizeof(struct sctp_paramhdr)) {
4983 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
4988 case SCTP_ECN_CAPABLE:
4989 if (padded_size != sizeof(struct sctp_ecn_supported_param)) {
4990 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
4995 case SCTP_ULP_ADAPTATION:
4996 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
4997 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5002 case SCTP_SUCCESS_REPORT:
5003 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5004 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5009 case SCTP_HOSTNAME_ADDRESS:
5011 /* We can NOT handle HOST NAME addresses!! */
5014 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5015 *abort_processing = 1;
5016 if (op_err == NULL) {
5017 /* Ok need to try to get a mbuf */
5019 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5021 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5024 l_len += sizeof(struct sctp_paramhdr);
5025 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5027 SCTP_BUF_LEN(op_err) = 0;
5029 * pre-reserve space for ip
5030 * and sctp header and
5034 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5036 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5038 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5039 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5043 /* If we have space */
5044 struct sctp_paramhdr s;
5047 uint32_t cpthis = 0;
5049 pad_needed = 4 - (err_at % 4);
5050 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5051 err_at += pad_needed;
5053 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5054 s.param_length = htons(sizeof(s) + plen);
5055 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5056 err_at += sizeof(s);
5057 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5059 sctp_m_freem(op_err);
5061 * we are out of memory but
5062 * we still need to have a
5063 * look at what to do (the
5064 * system is in trouble
5069 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5076 * we do not recognize the parameter figure out what
5079 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5080 if ((ptype & 0x4000) == 0x4000) {
5081 /* Report bit is set?? */
5082 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5083 if (op_err == NULL) {
5086 /* Ok need to try to get an mbuf */
5088 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5090 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5093 l_len += sizeof(struct sctp_paramhdr);
5094 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5096 SCTP_BUF_LEN(op_err) = 0;
5098 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5100 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5102 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5103 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5107 /* If we have space */
5108 struct sctp_paramhdr s;
5111 uint32_t cpthis = 0;
5113 pad_needed = 4 - (err_at % 4);
5114 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5115 err_at += pad_needed;
5117 s.param_type = htons(SCTP_UNRECOG_PARAM);
5118 s.param_length = htons(sizeof(s) + plen);
5119 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5120 err_at += sizeof(s);
5121 if (plen > sizeof(tempbuf)) {
5122 plen = sizeof(tempbuf);
5124 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5126 sctp_m_freem(op_err);
5128 * we are out of memory but
5129 * we still need to have a
5130 * look at what to do (the
5131 * system is in trouble
5135 goto more_processing;
5137 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5142 if ((ptype & 0x8000) == 0x0000) {
5143 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5146 /* skip this chunk and continue processing */
5147 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5148 at += SCTP_SIZE32(plen);
5153 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5157 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5158 *abort_processing = 1;
5159 if ((op_err == NULL) && phdr) {
5163 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5165 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5167 l_len += (2 * sizeof(struct sctp_paramhdr));
5168 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5170 SCTP_BUF_LEN(op_err) = 0;
5172 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5174 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5176 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5177 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5180 if ((op_err) && phdr) {
5181 struct sctp_paramhdr s;
5184 uint32_t cpthis = 0;
5186 pad_needed = 4 - (err_at % 4);
5187 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5188 err_at += pad_needed;
5190 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5191 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5192 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5193 err_at += sizeof(s);
5194 /* Only copy back the p-hdr that caused the issue */
5195 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5201 sctp_are_there_new_addresses(struct sctp_association *asoc,
5202 struct mbuf *in_initpkt, int offset)
5205 * Given a INIT packet, look through the packet to verify that there
5206 * are NO new addresses. As we go through the parameters add reports
5207 * of any un-understood parameters that require an error. Also we
5208 * must return (1) to drop the packet if we see a un-understood
5209 * parameter that tells us to drop the chunk.
5211 struct sockaddr *sa_touse;
5212 struct sockaddr *sa;
5213 struct sctp_paramhdr *phdr, params;
5214 uint16_t ptype, plen;
5216 struct sctp_nets *net;
5220 struct sockaddr_in sin4, *sa4;
5224 struct sockaddr_in6 sin6, *sa6;
5225 struct ip6_hdr *ip6h;
5230 memset(&sin4, 0, sizeof(sin4));
5231 sin4.sin_family = AF_INET;
5232 sin4.sin_len = sizeof(sin4);
5235 memset(&sin6, 0, sizeof(sin6));
5236 sin6.sin6_family = AF_INET6;
5237 sin6.sin6_len = sizeof(sin6);
5240 /* First what about the src address of the pkt ? */
5241 iph = mtod(in_initpkt, struct ip *);
5242 switch (iph->ip_v) {
5245 /* source addr is IPv4 */
5246 sin4.sin_addr = iph->ip_src;
5247 sa_touse = (struct sockaddr *)&sin4;
5251 case IPV6_VERSION >> 4:
5252 /* source addr is IPv6 */
5253 ip6h = mtod(in_initpkt, struct ip6_hdr *);
5254 sin6.sin6_addr = ip6h->ip6_src;
5255 sa_touse = (struct sockaddr *)&sin6;
5263 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5264 sa = (struct sockaddr *)&net->ro._l_addr;
5265 if (sa->sa_family == sa_touse->sa_family) {
5267 if (sa->sa_family == AF_INET) {
5268 sa4 = (struct sockaddr_in *)sa;
5269 if (sa4->sin_addr.s_addr == sin4.sin_addr.s_addr) {
5276 if (sa->sa_family == AF_INET6) {
5277 sa6 = (struct sockaddr_in6 *)sa;
5278 if (SCTP6_ARE_ADDR_EQUAL(sa6, &sin6)) {
5287 /* New address added! no need to look futher. */
5290 /* Ok so far lets munge through the rest of the packet */
5291 offset += sizeof(struct sctp_init_chunk);
5292 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5295 ptype = ntohs(phdr->param_type);
5296 plen = ntohs(phdr->param_length);
5299 case SCTP_IPV4_ADDRESS:
5301 struct sctp_ipv4addr_param *p4, p4_buf;
5303 phdr = sctp_get_next_param(in_initpkt, offset,
5304 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5305 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5309 p4 = (struct sctp_ipv4addr_param *)phdr;
5310 sin4.sin_addr.s_addr = p4->addr;
5311 sa_touse = (struct sockaddr *)&sin4;
5316 case SCTP_IPV6_ADDRESS:
5318 struct sctp_ipv6addr_param *p6, p6_buf;
5320 phdr = sctp_get_next_param(in_initpkt, offset,
5321 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5322 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5326 p6 = (struct sctp_ipv6addr_param *)phdr;
5327 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5329 sa_touse = (struct sockaddr *)&sin6;
5338 /* ok, sa_touse points to one to check */
5340 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5341 sa = (struct sockaddr *)&net->ro._l_addr;
5342 if (sa->sa_family != sa_touse->sa_family) {
5346 if (sa->sa_family == AF_INET) {
5347 sa4 = (struct sockaddr_in *)sa;
5348 if (sa4->sin_addr.s_addr ==
5349 sin4.sin_addr.s_addr) {
5356 if (sa->sa_family == AF_INET6) {
5357 sa6 = (struct sockaddr_in6 *)sa;
5358 if (SCTP6_ARE_ADDR_EQUAL(
5367 /* New addr added! no need to look further */
5371 offset += SCTP_SIZE32(plen);
5372 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5378 * Given a MBUF chain that was sent into us containing an INIT. Build a
5379 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5380 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5381 * message (i.e. the struct sctp_init_msg).
5384 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5385 struct mbuf *init_pkt, int iphlen, int offset, struct sctphdr *sh,
5386 struct sctp_init_chunk *init_chk, uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5388 struct sctp_association *asoc;
5389 struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last;
5390 struct sctp_init_ack_chunk *initack;
5391 struct sctp_adaptation_layer_indication *ali;
5392 struct sctp_ecn_supported_param *ecn;
5393 struct sctp_prsctp_supported_param *prsctp;
5394 struct sctp_supported_chunk_types_param *pr_supported;
5395 union sctp_sockstore store, store1, *over_addr;
5398 struct sockaddr_in *sin, *to_sin;
5402 struct sockaddr_in6 *sin6, *to_sin6;
5408 struct ip6_hdr *ip6;
5411 struct sockaddr *to;
5412 struct sctp_state_cookie stc;
5413 struct sctp_nets *net = NULL;
5414 uint8_t *signature = NULL;
5415 int cnt_inits_to = 0;
5416 uint16_t his_limit, i_want;
5417 int abort_flag, padval;
5420 int nat_friendly = 0;
5428 if ((asoc != NULL) &&
5429 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5430 (sctp_are_there_new_addresses(asoc, init_pkt, offset))) {
5431 /* new addresses, out of here in non-cookie-wait states */
5433 * Send a ABORT, we don't add the new address error clause
5434 * though we even set the T bit and copy in the 0 tag.. this
5435 * looks no different than if no listener was present.
5437 sctp_send_abort(init_pkt, iphlen, sh, 0, NULL, vrf_id, port);
5441 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5442 (offset + sizeof(struct sctp_init_chunk)),
5443 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5446 sctp_send_abort(init_pkt, iphlen, sh,
5447 init_chk->init.initiate_tag, op_err, vrf_id, port);
5450 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
5452 /* No memory, INIT timer will re-attempt. */
5454 sctp_m_freem(op_err);
5457 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
5459 /* the time I built cookie */
5460 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5462 /* populate any tie tags */
5464 /* unlock before tag selections */
5465 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5466 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5467 stc.cookie_life = asoc->cookie_life;
5468 net = asoc->primary_destination;
5470 stc.tie_tag_my_vtag = 0;
5471 stc.tie_tag_peer_vtag = 0;
5472 /* life I will award this cookie */
5473 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5476 /* copy in the ports for later check */
5477 stc.myport = sh->dest_port;
5478 stc.peerport = sh->src_port;
5481 * If we wanted to honor cookie life extentions, we would add to
5482 * stc.cookie_life. For now we should NOT honor any extension
5484 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5485 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5486 struct inpcb *in_inp;
5488 /* Its a V6 socket */
5489 in_inp = (struct inpcb *)inp;
5490 stc.ipv6_addr_legal = 1;
5491 /* Now look at the binding flag to see if V4 will be legal */
5492 if (SCTP_IPV6_V6ONLY(in_inp) == 0) {
5493 stc.ipv4_addr_legal = 1;
5495 /* V4 addresses are NOT legal on the association */
5496 stc.ipv4_addr_legal = 0;
5499 /* Its a V4 socket, no - V6 */
5500 stc.ipv4_addr_legal = 1;
5501 stc.ipv6_addr_legal = 0;
5504 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5509 /* now for scope setup */
5510 memset((caddr_t)&store, 0, sizeof(store));
5511 memset((caddr_t)&store1, 0, sizeof(store1));
5514 to_sin = &store1.sin;
5518 to_sin6 = &store1.sin6;
5520 iph = mtod(init_pkt, struct ip *);
5521 /* establish the to_addr's */
5522 switch (iph->ip_v) {
5525 to_sin->sin_port = sh->dest_port;
5526 to_sin->sin_family = AF_INET;
5527 to_sin->sin_len = sizeof(struct sockaddr_in);
5528 to_sin->sin_addr = iph->ip_dst;
5532 case IPV6_VERSION >> 4:
5533 ip6 = mtod(init_pkt, struct ip6_hdr *);
5534 to_sin6->sin6_addr = ip6->ip6_dst;
5535 to_sin6->sin6_scope_id = 0;
5536 to_sin6->sin6_port = sh->dest_port;
5537 to_sin6->sin6_family = AF_INET6;
5538 to_sin6->sin6_len = sizeof(struct sockaddr_in6);
5547 to = (struct sockaddr *)&store;
5548 switch (iph->ip_v) {
5552 sin->sin_family = AF_INET;
5553 sin->sin_len = sizeof(struct sockaddr_in);
5554 sin->sin_port = sh->src_port;
5555 sin->sin_addr = iph->ip_src;
5556 /* lookup address */
5557 stc.address[0] = sin->sin_addr.s_addr;
5561 stc.addr_type = SCTP_IPV4_ADDRESS;
5562 /* local from address */
5563 stc.laddress[0] = to_sin->sin_addr.s_addr;
5564 stc.laddress[1] = 0;
5565 stc.laddress[2] = 0;
5566 stc.laddress[3] = 0;
5567 stc.laddr_type = SCTP_IPV4_ADDRESS;
5568 /* scope_id is only for v6 */
5570 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5571 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
5576 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5577 /* Must use the address in this case */
5578 if (sctp_is_address_on_local_host((struct sockaddr *)sin, vrf_id)) {
5579 stc.loopback_scope = 1;
5582 stc.local_scope = 0;
5588 case IPV6_VERSION >> 4:
5590 ip6 = mtod(init_pkt, struct ip6_hdr *);
5591 sin6->sin6_family = AF_INET6;
5592 sin6->sin6_len = sizeof(struct sockaddr_in6);
5593 sin6->sin6_port = sh->src_port;
5594 sin6->sin6_addr = ip6->ip6_src;
5595 /* lookup address */
5596 memcpy(&stc.address, &sin6->sin6_addr,
5597 sizeof(struct in6_addr));
5598 sin6->sin6_scope_id = 0;
5599 stc.addr_type = SCTP_IPV6_ADDRESS;
5601 if (sctp_is_address_on_local_host((struct sockaddr *)sin6, vrf_id)) {
5603 * FIX ME: does this have scope from
5606 (void)sa6_recoverscope(sin6);
5607 stc.scope_id = sin6->sin6_scope_id;
5608 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
5609 stc.loopback_scope = 1;
5610 stc.local_scope = 0;
5613 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
5615 * If the new destination is a
5616 * LINK_LOCAL we must have common
5617 * both site and local scope. Don't
5618 * set local scope though since we
5619 * must depend on the source to be
5620 * added implicitly. We cannot
5621 * assure just because we share one
5622 * link that all links are common.
5624 stc.local_scope = 0;
5628 * we start counting for the private
5629 * address stuff at 1. since the
5630 * link local we source from won't
5631 * show up in our scoped count.
5635 * pull out the scope_id from
5639 * FIX ME: does this have scope from
5642 (void)sa6_recoverscope(sin6);
5643 stc.scope_id = sin6->sin6_scope_id;
5644 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
5645 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
5647 * If the new destination is
5648 * SITE_LOCAL then we must have site
5653 memcpy(&stc.laddress, &to_sin6->sin6_addr, sizeof(struct in6_addr));
5654 stc.laddr_type = SCTP_IPV6_ADDRESS;
5664 /* set the scope per the existing tcb */
5667 struct sctp_nets *lnet;
5671 stc.loopback_scope = asoc->loopback_scope;
5672 stc.ipv4_scope = asoc->ipv4_local_scope;
5673 stc.site_scope = asoc->site_scope;
5674 stc.local_scope = asoc->local_scope;
5676 /* Why do we not consider IPv4 LL addresses? */
5677 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5678 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5679 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5681 * if we have a LL address, start
5689 /* use the net pointer */
5690 to = (struct sockaddr *)&net->ro._l_addr;
5691 switch (to->sa_family) {
5694 sin = (struct sockaddr_in *)to;
5695 stc.address[0] = sin->sin_addr.s_addr;
5699 stc.addr_type = SCTP_IPV4_ADDRESS;
5700 if (net->src_addr_selected == 0) {
5702 * strange case here, the INIT should have
5703 * did the selection.
5705 net->ro._s_addr = sctp_source_address_selection(inp,
5706 stcb, (sctp_route_t *) & net->ro,
5708 if (net->ro._s_addr == NULL)
5711 net->src_addr_selected = 1;
5714 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5715 stc.laddress[1] = 0;
5716 stc.laddress[2] = 0;
5717 stc.laddress[3] = 0;
5718 stc.laddr_type = SCTP_IPV4_ADDRESS;
5719 /* scope_id is only for v6 */
5725 sin6 = (struct sockaddr_in6 *)to;
5726 memcpy(&stc.address, &sin6->sin6_addr,
5727 sizeof(struct in6_addr));
5728 stc.addr_type = SCTP_IPV6_ADDRESS;
5729 stc.scope_id = sin6->sin6_scope_id;
5730 if (net->src_addr_selected == 0) {
5732 * strange case here, the INIT should have
5733 * did the selection.
5735 net->ro._s_addr = sctp_source_address_selection(inp,
5736 stcb, (sctp_route_t *) & net->ro,
5738 if (net->ro._s_addr == NULL)
5741 net->src_addr_selected = 1;
5743 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5744 sizeof(struct in6_addr));
5745 stc.laddr_type = SCTP_IPV6_ADDRESS;
5750 /* Now lets put the SCTP header in place */
5751 initack = mtod(m, struct sctp_init_ack_chunk *);
5752 /* Save it off for quick ref */
5753 stc.peers_vtag = init_chk->init.initiate_tag;
5755 memcpy(stc.identification, SCTP_VERSION_STRING,
5756 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5757 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5758 /* now the chunk header */
5759 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5760 initack->ch.chunk_flags = 0;
5761 /* fill in later from mbuf we build */
5762 initack->ch.chunk_length = 0;
5763 /* place in my tag */
5764 if ((asoc != NULL) &&
5765 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5766 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5767 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5768 /* re-use the v-tags and init-seq here */
5769 initack->init.initiate_tag = htonl(asoc->my_vtag);
5770 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5772 uint32_t vtag, itsn;
5774 if (hold_inp_lock) {
5775 SCTP_INP_INCR_REF(inp);
5776 SCTP_INP_RUNLOCK(inp);
5779 atomic_add_int(&asoc->refcnt, 1);
5780 SCTP_TCB_UNLOCK(stcb);
5782 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5783 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5785 * Got a duplicate vtag on some guy behind a
5786 * nat make sure we don't use it.
5790 initack->init.initiate_tag = htonl(vtag);
5791 /* get a TSN to use too */
5792 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5793 initack->init.initial_tsn = htonl(itsn);
5794 SCTP_TCB_LOCK(stcb);
5795 atomic_add_int(&asoc->refcnt, -1);
5797 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5798 initack->init.initiate_tag = htonl(vtag);
5799 /* get a TSN to use too */
5800 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5802 if (hold_inp_lock) {
5803 SCTP_INP_RLOCK(inp);
5804 SCTP_INP_DECR_REF(inp);
5807 /* save away my tag to */
5808 stc.my_vtag = initack->init.initiate_tag;
5810 /* set up some of the credits. */
5811 so = inp->sctp_socket;
5813 /* memory problem */
5817 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5819 /* set what I want */
5820 his_limit = ntohs(init_chk->init.num_inbound_streams);
5821 /* choose what I want */
5823 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5824 i_want = asoc->streamoutcnt;
5826 i_want = inp->sctp_ep.pre_open_stream_count;
5829 i_want = inp->sctp_ep.pre_open_stream_count;
5831 if (his_limit < i_want) {
5832 /* I Want more :< */
5833 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5835 /* I can have what I want :> */
5836 initack->init.num_outbound_streams = htons(i_want);
5838 /* tell him his limt. */
5839 initack->init.num_inbound_streams =
5840 htons(inp->sctp_ep.max_open_streams_intome);
5842 /* adaptation layer indication parameter */
5843 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack));
5844 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5845 ali->ph.param_length = htons(sizeof(*ali));
5846 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
5847 SCTP_BUF_LEN(m) += sizeof(*ali);
5848 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
5851 if (((asoc != NULL) && (asoc->ecn_allowed == 1)) ||
5852 (inp->sctp_ecn_enable == 1)) {
5853 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
5854 ecn->ph.param_length = htons(sizeof(*ecn));
5855 SCTP_BUF_LEN(m) += sizeof(*ecn);
5857 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
5860 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
5862 /* And now tell the peer we do pr-sctp */
5863 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
5864 prsctp->ph.param_length = htons(sizeof(*prsctp));
5865 SCTP_BUF_LEN(m) += sizeof(*prsctp);
5867 /* Add NAT friendly parameter */
5868 struct sctp_paramhdr *ph;
5870 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5871 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5872 ph->param_length = htons(sizeof(struct sctp_paramhdr));
5873 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
5875 /* And now tell the peer we do all the extensions */
5876 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5877 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5879 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5880 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5881 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5882 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5883 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5884 if (!SCTP_BASE_SYSCTL(sctp_auth_disable))
5885 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5886 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
5887 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5888 p_len = sizeof(*pr_supported) + num_ext;
5889 pr_supported->ph.param_length = htons(p_len);
5890 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
5891 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5893 /* add authentication parameters */
5894 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
5895 struct sctp_auth_random *randp;
5896 struct sctp_auth_hmac_algo *hmacs;
5897 struct sctp_auth_chunk_list *chunks;
5898 uint16_t random_len;
5900 /* generate and add RANDOM parameter */
5901 random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5902 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5903 randp->ph.param_type = htons(SCTP_RANDOM);
5904 p_len = sizeof(*randp) + random_len;
5905 randp->ph.param_length = htons(p_len);
5906 SCTP_READ_RANDOM(randp->random_data, random_len);
5907 /* zero out any padding required */
5908 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
5909 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5911 /* add HMAC_ALGO parameter */
5912 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5913 p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5914 (uint8_t *) hmacs->hmac_ids);
5916 p_len += sizeof(*hmacs);
5917 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5918 hmacs->ph.param_length = htons(p_len);
5919 /* zero out any padding required */
5920 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
5921 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5923 /* add CHUNKS parameter */
5924 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5925 p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5926 chunks->chunk_types);
5928 p_len += sizeof(*chunks);
5929 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5930 chunks->ph.param_length = htons(p_len);
5931 /* zero out any padding required */
5932 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
5933 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5937 /* now the addresses */
5939 struct sctp_scoping scp;
5942 * To optimize this we could put the scoping stuff into a
5943 * structure and remove the individual uint8's from the stc
5944 * structure. Then we could just sifa in the address within
5945 * the stc.. but for now this is a quick hack to get the
5946 * address stuff teased apart.
5948 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5949 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5950 scp.loopback_scope = stc.loopback_scope;
5951 scp.ipv4_local_scope = stc.ipv4_scope;
5952 scp.local_scope = stc.local_scope;
5953 scp.site_scope = stc.site_scope;
5954 m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to);
5957 /* tack on the operational error if present */
5966 llen += SCTP_BUF_LEN(ol);
5967 ol = SCTP_BUF_NEXT(ol);
5970 /* must add a pad to the param */
5971 uint32_t cpthis = 0;
5974 padlen = 4 - (llen % 4);
5975 m_copyback(op_err, llen, padlen, (caddr_t)&cpthis);
5977 while (SCTP_BUF_NEXT(m_at) != NULL) {
5978 m_at = SCTP_BUF_NEXT(m_at);
5980 SCTP_BUF_NEXT(m_at) = op_err;
5981 while (SCTP_BUF_NEXT(m_at) != NULL) {
5982 m_at = SCTP_BUF_NEXT(m_at);
5985 /* pre-calulate the size and update pkt header and chunk header */
5987 for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5988 p_len += SCTP_BUF_LEN(m_tmp);
5989 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5990 /* m_tmp should now point to last one */
5995 /* Now we must build a cookie */
5996 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
5997 if (m_cookie == NULL) {
5998 /* memory problem */
6002 /* Now append the cookie to the end and update the space/size */
6003 SCTP_BUF_NEXT(m_tmp) = m_cookie;
6005 for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6006 p_len += SCTP_BUF_LEN(m_tmp);
6007 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6008 /* m_tmp should now point to last one */
6014 * Place in the size, but we don't include the last pad (if any) in
6017 initack->ch.chunk_length = htons(p_len);
6020 * Time to sign the cookie, we don't sign over the cookie signature
6021 * though thus we set trailer.
6023 (void)sctp_hmac_m(SCTP_HMAC,
6024 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6025 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6026 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6028 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6029 * here since the timer will drive a retranmission.
6032 if ((padval) && (mp_last)) {
6033 /* see my previous comments on mp_last */
6034 if (sctp_add_pad_tombuf(mp_last, (4 - padval))) {
6035 /* Houston we have a problem, no space */
6040 if (stc.loopback_scope) {
6041 over_addr = &store1;
6046 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6048 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6049 port, SCTP_SO_NOT_LOCKED, over_addr, init_pkt);
6050 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6055 sctp_prune_prsctp(struct sctp_tcb *stcb,
6056 struct sctp_association *asoc,
6057 struct sctp_sndrcvinfo *srcv,
6061 struct sctp_tmit_chunk *chk, *nchk;
6063 SCTP_TCB_LOCK_ASSERT(stcb);
6064 if ((asoc->peer_supports_prsctp) &&
6065 (asoc->sent_queue_cnt_removeable > 0)) {
6066 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6068 * Look for chunks marked with the PR_SCTP flag AND
6069 * the buffer space flag. If the one being sent is
6070 * equal or greater priority then purge the old one
6071 * and free some space.
6073 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6075 * This one is PR-SCTP AND buffer space
6078 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6080 * Lower numbers equates to higher
6081 * priority so if the one we are
6082 * looking at has a larger or equal
6083 * priority we want to drop the data
6084 * and NOT retransmit it.
6088 * We release the book_size
6089 * if the mbuf is here
6094 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6098 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6101 freed_spc += ret_spc;
6102 if (freed_spc >= dataout) {
6105 } /* if chunk was present */
6106 } /* if of sufficent priority */
6107 } /* if chunk has enabled */
6108 } /* tailqforeach */
6110 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6111 /* Here we must move to the sent queue and mark */
6112 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6113 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6116 * We release the book_size
6117 * if the mbuf is here
6121 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6124 freed_spc += ret_spc;
6125 if (freed_spc >= dataout) {
6128 } /* end if chk->data */
6129 } /* end if right class */
6130 } /* end if chk pr-sctp */
6131 } /* tailqforeachsafe (chk) */
6132 } /* if enabled in asoc */
6136 sctp_get_frag_point(struct sctp_tcb *stcb,
6137 struct sctp_association *asoc)
6142 * For endpoints that have both v6 and v4 addresses we must reserve
6143 * room for the ipv6 header, for those that are only dealing with V4
6144 * we use a larger frag point.
6146 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6147 ovh = SCTP_MED_OVERHEAD;
6149 ovh = SCTP_MED_V4_OVERHEAD;
6152 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6153 siz = asoc->smallest_mtu - ovh;
6155 siz = (stcb->asoc.sctp_frag_point - ovh);
6157 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6159 /* A data chunk MUST fit in a cluster */
6160 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6163 /* adjust for an AUTH chunk if DATA requires auth */
6164 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6165 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6168 /* make it an even word boundary please */
6175 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6179 * We assume that the user wants PR_SCTP_TTL if the user provides a
6180 * positive lifetime but does not specify any PR_SCTP policy. This
6181 * is a BAD assumption and causes problems at least with the
6182 * U-Vancovers MPI folks. I will change this to be no policy means
6185 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6186 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6191 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6192 case CHUNK_FLAGS_PR_SCTP_BUF:
6194 * Time to live is a priority stored in tv_sec when doing
6195 * the buffer drop thing.
6197 sp->ts.tv_sec = sp->timetolive;
6200 case CHUNK_FLAGS_PR_SCTP_TTL:
6204 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6205 tv.tv_sec = sp->timetolive / 1000;
6206 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6208 * TODO sctp_constants.h needs alternative time
6209 * macros when _KERNEL is undefined.
6211 timevaladd(&sp->ts, &tv);
6214 case CHUNK_FLAGS_PR_SCTP_RTX:
6216 * Time to live is a the number or retransmissions stored in
6219 sp->ts.tv_sec = sp->timetolive;
6223 SCTPDBG(SCTP_DEBUG_USRREQ1,
6224 "Unknown PR_SCTP policy %u.\n",
6225 PR_SCTP_POLICY(sp->sinfo_flags));
6231 sctp_msg_append(struct sctp_tcb *stcb,
6232 struct sctp_nets *net,
6234 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6238 struct sctp_stream_queue_pending *sp = NULL;
6239 struct sctp_stream_out *strm;
6242 * Given an mbuf chain, put it into the association send queue and
6243 * place it on the wheel
6245 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6246 /* Invalid stream number */
6247 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6251 if ((stcb->asoc.stream_locked) &&
6252 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6253 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6257 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6258 /* Now can we send this? */
6259 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6260 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6261 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6262 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6263 /* got data while shutting down */
6264 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6268 sctp_alloc_a_strmoq(stcb, sp);
6270 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6274 sp->sinfo_flags = srcv->sinfo_flags;
6275 sp->timetolive = srcv->sinfo_timetolive;
6276 sp->ppid = srcv->sinfo_ppid;
6277 sp->context = srcv->sinfo_context;
6279 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6281 atomic_add_int(&sp->net->ref_count, 1);
6285 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6286 sp->stream = srcv->sinfo_stream;
6287 sp->msg_is_complete = 1;
6288 sp->sender_all_done = 1;
6291 sp->tail_mbuf = NULL;
6292 sctp_set_prsctp_policy(sp);
6294 * We could in theory (for sendall) sifa the length in, but we would
6295 * still have to hunt through the chain since we need to setup the
6299 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6300 if (SCTP_BUF_NEXT(at) == NULL)
6302 sp->length += SCTP_BUF_LEN(at);
6304 if (srcv->sinfo_keynumber_valid) {
6305 sp->auth_keyid = srcv->sinfo_keynumber;
6307 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6309 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6310 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6311 sp->holds_key_ref = 1;
6313 if (hold_stcb_lock == 0) {
6314 SCTP_TCB_SEND_LOCK(stcb);
6316 sctp_snd_sb_alloc(stcb, sp->length);
6317 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6318 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6319 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
6320 sp->strseq = strm->next_sequence_sent;
6321 strm->next_sequence_sent++;
6323 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6325 if (hold_stcb_lock == 0) {
6326 SCTP_TCB_SEND_UNLOCK(stcb);
6336 static struct mbuf *
6337 sctp_copy_mbufchain(struct mbuf *clonechain,
6338 struct mbuf *outchain,
6339 struct mbuf **endofchain,
6342 uint8_t copy_by_ref)
6345 struct mbuf *appendchain;
6349 if (endofchain == NULL) {
6353 sctp_m_freem(outchain);
6356 if (can_take_mbuf) {
6357 appendchain = clonechain;
6360 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6362 /* Its not in a cluster */
6363 if (*endofchain == NULL) {
6364 /* lets get a mbuf cluster */
6365 if (outchain == NULL) {
6366 /* This is the general case */
6368 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6369 if (outchain == NULL) {
6372 SCTP_BUF_LEN(outchain) = 0;
6373 *endofchain = outchain;
6374 /* get the prepend space */
6375 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6378 * We really should not get a NULL
6384 if (SCTP_BUF_NEXT(m) == NULL) {
6388 m = SCTP_BUF_NEXT(m);
6391 if (*endofchain == NULL) {
6393 * huh, TSNH XXX maybe we
6396 sctp_m_freem(outchain);
6400 /* get the new end of length */
6401 len = M_TRAILINGSPACE(*endofchain);
6403 /* how much is left at the end? */
6404 len = M_TRAILINGSPACE(*endofchain);
6406 /* Find the end of the data, for appending */
6407 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6409 /* Now lets copy it out */
6410 if (len >= sizeofcpy) {
6411 /* It all fits, copy it in */
6412 m_copydata(clonechain, 0, sizeofcpy, cp);
6413 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6415 /* fill up the end of the chain */
6417 m_copydata(clonechain, 0, len, cp);
6418 SCTP_BUF_LEN((*endofchain)) += len;
6419 /* now we need another one */
6422 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6427 SCTP_BUF_NEXT((*endofchain)) = m;
6429 cp = mtod((*endofchain), caddr_t);
6430 m_copydata(clonechain, len, sizeofcpy, cp);
6431 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6435 /* copy the old fashion way */
6436 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_DONTWAIT);
6437 #ifdef SCTP_MBUF_LOGGING
6438 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6441 for (mat = appendchain; mat; mat = SCTP_BUF_NEXT(mat)) {
6442 if (SCTP_BUF_IS_EXTENDED(mat)) {
6443 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6450 if (appendchain == NULL) {
6453 sctp_m_freem(outchain);
6457 /* tack on to the end */
6458 if (*endofchain != NULL) {
6459 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6463 if (SCTP_BUF_NEXT(m) == NULL) {
6464 SCTP_BUF_NEXT(m) = appendchain;
6467 m = SCTP_BUF_NEXT(m);
6471 * save off the end and update the end-chain postion
6475 if (SCTP_BUF_NEXT(m) == NULL) {
6479 m = SCTP_BUF_NEXT(m);
6483 /* save off the end and update the end-chain postion */
6486 if (SCTP_BUF_NEXT(m) == NULL) {
6490 m = SCTP_BUF_NEXT(m);
6492 return (appendchain);
6497 sctp_med_chunk_output(struct sctp_inpcb *inp,
6498 struct sctp_tcb *stcb,
6499 struct sctp_association *asoc,
6502 int control_only, int from_where,
6503 struct timeval *now, int *now_filled, int frag_point, int so_locked
6504 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6510 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6511 uint32_t val SCTP_UNUSED)
6513 struct sctp_copy_all *ca;
6516 int added_control = 0;
6517 int un_sent, do_chunk_output = 1;
6518 struct sctp_association *asoc;
6519 struct sctp_nets *net;
6521 ca = (struct sctp_copy_all *)ptr;
6522 if (ca->m == NULL) {
6525 if (ca->inp != inp) {
6529 if ((ca->m) && ca->sndlen) {
6530 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_DONTWAIT);
6532 /* can't copy so we are done */
6536 #ifdef SCTP_MBUF_LOGGING
6537 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6540 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6541 if (SCTP_BUF_IS_EXTENDED(mat)) {
6542 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6550 SCTP_TCB_LOCK_ASSERT(stcb);
6551 if (stcb->asoc.alternate) {
6552 net = stcb->asoc.alternate;
6554 net = stcb->asoc.primary_destination;
6556 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6557 /* Abort this assoc with m as the user defined reason */
6559 struct sctp_paramhdr *ph;
6561 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_DONTWAIT);
6563 ph = mtod(m, struct sctp_paramhdr *);
6564 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6565 ph->param_length = htons(ca->sndlen);
6568 * We add one here to keep the assoc from
6569 * dis-appearing on us.
6571 atomic_add_int(&stcb->asoc.refcnt, 1);
6572 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6574 * sctp_abort_an_association calls sctp_free_asoc()
6575 * free association will NOT free it since we
6576 * incremented the refcnt .. we do this to prevent
6577 * it being freed and things getting tricky since we
6578 * could end up (from free_asoc) calling inpcb_free
6579 * which would get a recursive lock call to the
6580 * iterator lock.. But as a consequence of that the
6581 * stcb will return to us un-locked.. since
6582 * free_asoc returns with either no TCB or the TCB
6583 * unlocked, we must relock.. to unlock in the
6584 * iterator timer :-0
6586 SCTP_TCB_LOCK(stcb);
6587 atomic_add_int(&stcb->asoc.refcnt, -1);
6588 goto no_chunk_output;
6592 ret = sctp_msg_append(stcb, net, m,
6596 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6597 /* shutdown this assoc */
6600 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6602 if (TAILQ_EMPTY(&asoc->send_queue) &&
6603 TAILQ_EMPTY(&asoc->sent_queue) &&
6605 if (asoc->locked_on_sending) {
6609 * there is nothing queued to send, so I'm
6612 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6613 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6614 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6616 * only send SHUTDOWN the first time
6619 sctp_send_shutdown(stcb, net);
6620 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6621 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6623 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6624 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6625 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6627 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6628 asoc->primary_destination);
6630 do_chunk_output = 0;
6634 * we still got (or just got) data to send,
6635 * so set SHUTDOWN_PENDING
6638 * XXX sockets draft says that SCTP_EOF
6639 * should be sent with no data. currently,
6640 * we will allow user data to be sent first
6641 * and move to SHUTDOWN-PENDING
6643 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6644 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6645 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6646 if (asoc->locked_on_sending) {
6648 * Locked to send out the
6651 struct sctp_stream_queue_pending *sp;
6653 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6655 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6656 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6659 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6660 if (TAILQ_EMPTY(&asoc->send_queue) &&
6661 TAILQ_EMPTY(&asoc->sent_queue) &&
6662 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6664 atomic_add_int(&stcb->asoc.refcnt, 1);
6665 sctp_abort_an_association(stcb->sctp_ep, stcb,
6666 NULL, SCTP_SO_NOT_LOCKED);
6667 atomic_add_int(&stcb->asoc.refcnt, -1);
6668 goto no_chunk_output;
6670 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6671 asoc->primary_destination);
6677 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6678 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6680 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6681 (stcb->asoc.total_flight > 0) &&
6682 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))
6684 do_chunk_output = 0;
6686 if (do_chunk_output)
6687 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6688 else if (added_control) {
6689 int num_out = 0, reason = 0, now_filled = 0;
6693 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6694 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6695 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6706 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6708 struct sctp_copy_all *ca;
6710 ca = (struct sctp_copy_all *)ptr;
6712 * Do a notify here? Kacheong suggests that the notify be done at
6713 * the send time.. so you would push up a notification if any send
6714 * failed. Don't know if this is feasable since the only failures we
6715 * have is "memory" related and if you cannot get an mbuf to send
6716 * the data you surely can't get an mbuf to send up to notify the
6717 * user you can't send the data :->
6720 /* now free everything */
6721 sctp_m_freem(ca->m);
6722 SCTP_FREE(ca, SCTP_M_COPYAL);
6726 #define MC_ALIGN(m, len) do { \
6727 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \
6732 static struct mbuf *
6733 sctp_copy_out_all(struct uio *uio, int len)
6735 struct mbuf *ret, *at;
6736 int left, willcpy, cancpy, error;
6738 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAIT, 1, MT_DATA);
6744 SCTP_BUF_LEN(ret) = 0;
6745 /* save space for the data chunk header */
6746 cancpy = M_TRAILINGSPACE(ret);
6747 willcpy = min(cancpy, left);
6750 /* Align data to the end */
6751 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6757 SCTP_BUF_LEN(at) = willcpy;
6758 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6761 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAIT, 1, MT_DATA);
6762 if (SCTP_BUF_NEXT(at) == NULL) {
6765 at = SCTP_BUF_NEXT(at);
6766 SCTP_BUF_LEN(at) = 0;
6767 cancpy = M_TRAILINGSPACE(at);
6768 willcpy = min(cancpy, left);
6775 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6776 struct sctp_sndrcvinfo *srcv)
6779 struct sctp_copy_all *ca;
6781 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6785 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6788 memset(ca, 0, sizeof(struct sctp_copy_all));
6792 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6795 * take off the sendall flag, it would be bad if we failed to do
6798 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6799 /* get length and mbuf chain */
6801 ca->sndlen = uio->uio_resid;
6802 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6803 if (ca->m == NULL) {
6804 SCTP_FREE(ca, SCTP_M_COPYAL);
6805 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6809 /* Gather the length of the send */
6815 ca->sndlen += SCTP_BUF_LEN(m);
6816 m = SCTP_BUF_NEXT(m);
6820 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6821 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6822 SCTP_ASOC_ANY_STATE,
6824 sctp_sendall_completes, inp, 1);
6826 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6827 SCTP_FREE(ca, SCTP_M_COPYAL);
6828 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6836 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6838 struct sctp_tmit_chunk *chk, *nchk;
6840 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6841 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6842 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6844 sctp_m_freem(chk->data);
6847 asoc->ctrl_queue_cnt--;
6848 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6854 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6856 struct sctp_association *asoc;
6857 struct sctp_tmit_chunk *chk, *nchk;
6858 struct sctp_asconf_chunk *acp;
6861 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6862 /* find SCTP_ASCONF chunk in queue */
6863 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6865 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6866 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6871 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6873 sctp_m_freem(chk->data);
6876 asoc->ctrl_queue_cnt--;
6877 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6884 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6885 struct sctp_association *asoc,
6886 struct sctp_tmit_chunk **data_list,
6888 struct sctp_nets *net)
6891 struct sctp_tmit_chunk *tp1;
6893 for (i = 0; i < bundle_at; i++) {
6894 /* off of the send queue */
6895 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6896 asoc->send_queue_cnt--;
6899 * Any chunk NOT 0 you zap the time chunk 0 gets
6900 * zapped or set based on if a RTO measurment is
6903 data_list[i]->do_rtt = 0;
6906 data_list[i]->sent_rcv_time = net->last_sent_time;
6907 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6908 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6909 if (data_list[i]->whoTo == NULL) {
6910 data_list[i]->whoTo = net;
6911 atomic_add_int(&net->ref_count, 1);
6913 /* on to the sent queue */
6914 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6915 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6916 struct sctp_tmit_chunk *tpp;
6918 /* need to move back */
6920 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6922 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6926 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6929 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6931 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6936 /* This does not lower until the cum-ack passes it */
6937 asoc->sent_queue_cnt++;
6938 if ((asoc->peers_rwnd <= 0) &&
6939 (asoc->total_flight == 0) &&
6941 /* Mark the chunk as being a window probe */
6942 SCTP_STAT_INCR(sctps_windowprobed);
6944 #ifdef SCTP_AUDITING_ENABLED
6945 sctp_audit_log(0xC2, 3);
6947 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6948 data_list[i]->snd_count = 1;
6949 data_list[i]->rec.data.chunk_was_revoked = 0;
6950 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6951 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6952 data_list[i]->whoTo->flight_size,
6953 data_list[i]->book_size,
6954 (uintptr_t) data_list[i]->whoTo,
6955 data_list[i]->rec.data.TSN_seq);
6957 sctp_flight_size_increase(data_list[i]);
6958 sctp_total_flight_increase(stcb, data_list[i]);
6959 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6960 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6961 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6963 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6964 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6965 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6966 /* SWS sender side engages */
6967 asoc->peers_rwnd = 0;
6970 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6971 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
6976 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
6977 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6982 struct sctp_tmit_chunk *chk, *nchk;
6984 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6985 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
6986 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
6987 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
6988 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
6989 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
6990 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
6991 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
6992 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
6993 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
6994 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
6995 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
6996 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
6997 /* Stray chunks must be cleaned up */
6999 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7001 sctp_m_freem(chk->data);
7004 asoc->ctrl_queue_cnt--;
7005 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7006 asoc->fwd_tsn_cnt--;
7007 sctp_free_a_chunk(stcb, chk, so_locked);
7008 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7009 /* special handling, we must look into the param */
7010 if (chk != asoc->str_reset) {
7011 goto clean_up_anyway;
7019 sctp_can_we_split_this(struct sctp_tcb *stcb,
7021 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7024 * Make a decision on if I should split a msg into multiple parts.
7025 * This is only asked of incomplete messages.
7029 * If we are doing EEOR we need to always send it if its the
7030 * entire thing, since it might be all the guy is putting in
7033 if (goal_mtu >= length) {
7035 * If we have data outstanding,
7036 * we get another chance when the sack
7037 * arrives to transmit - wait for more data
7039 if (stcb->asoc.total_flight == 0) {
7041 * If nothing is in flight, we zero the
7049 /* You can fill the rest */
7054 * For those strange folk that make the send buffer
7055 * smaller than our fragmentation point, we can't
7056 * get a full msg in so we have to allow splitting.
7058 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7061 if ((length <= goal_mtu) ||
7062 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7063 /* Sub-optimial residual don't split in non-eeor mode. */
7067 * If we reach here length is larger than the goal_mtu. Do we wish
7068 * to split it for the sake of packet putting together?
7070 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7071 /* Its ok to split it */
7072 return (min(goal_mtu, frag_point));
7074 /* Nope, can't split */
7080 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7081 struct sctp_stream_out *strq,
7083 uint32_t frag_point,
7089 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7094 /* Move from the stream to the send_queue keeping track of the total */
7095 struct sctp_association *asoc;
7096 struct sctp_stream_queue_pending *sp;
7097 struct sctp_tmit_chunk *chk;
7098 struct sctp_data_chunk *dchkh;
7099 uint32_t to_move, length;
7100 uint8_t rcv_flags = 0;
7102 uint8_t send_lock_up = 0;
7104 SCTP_TCB_LOCK_ASSERT(stcb);
7107 /* sa_ignore FREED_MEMORY */
7108 sp = TAILQ_FIRST(&strq->outqueue);
7111 if (send_lock_up == 0) {
7112 SCTP_TCB_SEND_LOCK(stcb);
7115 sp = TAILQ_FIRST(&strq->outqueue);
7119 if (strq->last_msg_incomplete) {
7120 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7122 strq->last_msg_incomplete);
7123 strq->last_msg_incomplete = 0;
7127 SCTP_TCB_SEND_UNLOCK(stcb);
7132 if ((sp->msg_is_complete) && (sp->length == 0)) {
7133 if (sp->sender_all_done) {
7135 * We are doing differed cleanup. Last time through
7136 * when we took all the data the sender_all_done was
7139 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7140 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7141 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7142 sp->sender_all_done,
7144 sp->msg_is_complete,
7148 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7149 SCTP_TCB_SEND_LOCK(stcb);
7152 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7153 TAILQ_REMOVE(&strq->outqueue, sp, next);
7154 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7156 sctp_free_remote_addr(sp->net);
7160 sctp_m_freem(sp->data);
7163 sctp_free_a_strmoq(stcb, sp, so_locked);
7164 /* we can't be locked to it */
7166 stcb->asoc.locked_on_sending = NULL;
7168 SCTP_TCB_SEND_UNLOCK(stcb);
7171 /* back to get the next msg */
7175 * sender just finished this but still holds a
7184 /* is there some to get */
7185 if (sp->length == 0) {
7191 } else if (sp->discard_rest) {
7192 if (send_lock_up == 0) {
7193 SCTP_TCB_SEND_LOCK(stcb);
7196 /* Whack down the size */
7197 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7198 if ((stcb->sctp_socket != NULL) && \
7199 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7200 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7201 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7204 sctp_m_freem(sp->data);
7206 sp->tail_mbuf = NULL;
7216 some_taken = sp->some_taken;
7217 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7218 sp->msg_is_complete = 1;
7221 length = sp->length;
7222 if (sp->msg_is_complete) {
7223 /* The message is complete */
7224 to_move = min(length, frag_point);
7225 if (to_move == length) {
7226 /* All of it fits in the MTU */
7227 if (sp->some_taken) {
7228 rcv_flags |= SCTP_DATA_LAST_FRAG;
7229 sp->put_last_out = 1;
7231 rcv_flags |= SCTP_DATA_NOT_FRAG;
7232 sp->put_last_out = 1;
7235 /* Not all of it fits, we fragment */
7236 if (sp->some_taken == 0) {
7237 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7242 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7245 * We use a snapshot of length in case it
7246 * is expanding during the compare.
7251 if (to_move >= llen) {
7253 if (send_lock_up == 0) {
7255 * We are taking all of an incomplete msg
7256 * thus we need a send lock.
7258 SCTP_TCB_SEND_LOCK(stcb);
7260 if (sp->msg_is_complete) {
7262 * the sender finished the
7269 if (sp->some_taken == 0) {
7270 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7274 /* Nothing to take. */
7275 if (sp->some_taken) {
7284 /* If we reach here, we can copy out a chunk */
7285 sctp_alloc_a_chunk(stcb, chk);
7287 /* No chunk memory */
7293 * Setup for unordered if needed by looking at the user sent info
7296 if (sp->sinfo_flags & SCTP_UNORDERED) {
7297 rcv_flags |= SCTP_DATA_UNORDERED;
7299 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7300 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7301 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7303 /* clear out the chunk before setting up */
7304 memset(chk, 0, sizeof(*chk));
7305 chk->rec.data.rcv_flags = rcv_flags;
7307 if (to_move >= length) {
7308 /* we think we can steal the whole thing */
7309 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7310 SCTP_TCB_SEND_LOCK(stcb);
7313 if (to_move < sp->length) {
7314 /* bail, it changed */
7317 chk->data = sp->data;
7318 chk->last_mbuf = sp->tail_mbuf;
7319 /* register the stealing */
7320 sp->data = sp->tail_mbuf = NULL;
7325 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_DONTWAIT);
7326 chk->last_mbuf = NULL;
7327 if (chk->data == NULL) {
7328 sp->some_taken = some_taken;
7329 sctp_free_a_chunk(stcb, chk, so_locked);
7334 #ifdef SCTP_MBUF_LOGGING
7335 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7338 for (mat = chk->data; mat; mat = SCTP_BUF_NEXT(mat)) {
7339 if (SCTP_BUF_IS_EXTENDED(mat)) {
7340 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
7345 /* Pull off the data */
7346 m_adj(sp->data, to_move);
7347 /* Now lets work our way down and compact it */
7349 while (m && (SCTP_BUF_LEN(m) == 0)) {
7350 sp->data = SCTP_BUF_NEXT(m);
7351 SCTP_BUF_NEXT(m) = NULL;
7352 if (sp->tail_mbuf == m) {
7354 * Freeing tail? TSNH since
7355 * we supposedly were taking less
7356 * than the sp->length.
7359 panic("Huh, freing tail? - TSNH");
7361 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7362 sp->tail_mbuf = sp->data = NULL;
7371 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7372 chk->copy_by_ref = 1;
7374 chk->copy_by_ref = 0;
7377 * get last_mbuf and counts of mb useage This is ugly but hopefully
7378 * its only one mbuf.
7380 if (chk->last_mbuf == NULL) {
7381 chk->last_mbuf = chk->data;
7382 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7383 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7386 if (to_move > length) {
7387 /*- This should not happen either
7388 * since we always lower to_move to the size
7389 * of sp->length if its larger.
7392 panic("Huh, how can to_move be larger?");
7394 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7398 atomic_subtract_int(&sp->length, to_move);
7400 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7401 /* Not enough room for a chunk header, get some */
7404 m = sctp_get_mbuf_for_msg(1, 0, M_DONTWAIT, 0, MT_DATA);
7407 * we're in trouble here. _PREPEND below will free
7408 * all the data if there is no leading space, so we
7409 * must put the data back and restore.
7411 if (send_lock_up == 0) {
7412 SCTP_TCB_SEND_LOCK(stcb);
7415 if (chk->data == NULL) {
7416 /* unsteal the data */
7417 sp->data = chk->data;
7418 sp->tail_mbuf = chk->last_mbuf;
7422 /* reassemble the data */
7424 sp->data = chk->data;
7425 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7427 sp->some_taken = some_taken;
7428 atomic_add_int(&sp->length, to_move);
7431 sctp_free_a_chunk(stcb, chk, so_locked);
7435 SCTP_BUF_LEN(m) = 0;
7436 SCTP_BUF_NEXT(m) = chk->data;
7438 M_ALIGN(chk->data, 4);
7441 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT);
7442 if (chk->data == NULL) {
7443 /* HELP, TSNH since we assured it would not above? */
7445 panic("prepend failes HELP?");
7447 SCTP_PRINTF("prepend fails HELP?\n");
7448 sctp_free_a_chunk(stcb, chk, so_locked);
7454 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7455 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7456 chk->book_size_scale = 0;
7457 chk->sent = SCTP_DATAGRAM_UNSENT;
7460 chk->asoc = &stcb->asoc;
7461 chk->pad_inplace = 0;
7462 chk->no_fr_allowed = 0;
7463 chk->rec.data.stream_seq = sp->strseq;
7464 chk->rec.data.stream_number = sp->stream;
7465 chk->rec.data.payloadtype = sp->ppid;
7466 chk->rec.data.context = sp->context;
7467 chk->rec.data.doing_fast_retransmit = 0;
7469 chk->rec.data.timetodrop = sp->ts;
7470 chk->flags = sp->act_flags;
7473 chk->whoTo = sp->net;
7474 atomic_add_int(&chk->whoTo->ref_count, 1);
7478 if (sp->holds_key_ref) {
7479 chk->auth_keyid = sp->auth_keyid;
7480 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7481 chk->holds_key_ref = 1;
7483 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7484 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7485 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7486 (uintptr_t) stcb, sp->length,
7487 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7488 chk->rec.data.TSN_seq);
7490 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7492 * Put the rest of the things in place now. Size was done earlier in
7493 * previous loop prior to padding.
7496 #ifdef SCTP_ASOCLOG_OF_TSNS
7497 SCTP_TCB_LOCK_ASSERT(stcb);
7498 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7499 asoc->tsn_out_at = 0;
7500 asoc->tsn_out_wrapped = 1;
7502 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7503 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7504 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7505 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7506 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7507 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7508 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7509 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7513 dchkh->ch.chunk_type = SCTP_DATA;
7514 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7515 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7516 dchkh->dp.stream_id = htons(strq->stream_no);
7517 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7518 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7519 dchkh->ch.chunk_length = htons(chk->send_size);
7520 /* Now advance the chk->send_size by the actual pad needed. */
7521 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7526 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7527 if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) {
7528 chk->pad_inplace = 1;
7530 if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) {
7531 /* pad added an mbuf */
7532 chk->last_mbuf = lm;
7534 chk->send_size += pads;
7536 /* We only re-set the policy if it is on */
7537 if (sp->pr_sctp_on) {
7538 sctp_set_prsctp_policy(sp);
7539 asoc->pr_sctp_cnt++;
7540 chk->pr_sctp_on = 1;
7542 chk->pr_sctp_on = 0;
7544 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7545 /* All done pull and kill the message */
7546 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7547 if (sp->put_last_out == 0) {
7548 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7549 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7550 sp->sender_all_done,
7552 sp->msg_is_complete,
7556 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7557 SCTP_TCB_SEND_LOCK(stcb);
7560 TAILQ_REMOVE(&strq->outqueue, sp, next);
7561 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7563 sctp_free_remote_addr(sp->net);
7567 sctp_m_freem(sp->data);
7570 sctp_free_a_strmoq(stcb, sp, so_locked);
7572 /* we can't be locked to it */
7574 stcb->asoc.locked_on_sending = NULL;
7576 /* more to go, we are locked */
7579 asoc->chunks_on_out_queue++;
7580 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7581 asoc->send_queue_cnt++;
7584 SCTP_TCB_SEND_UNLOCK(stcb);
7591 sctp_fill_outqueue(struct sctp_tcb *stcb,
7592 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7593 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7598 struct sctp_association *asoc;
7599 struct sctp_stream_out *strq;
7600 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7603 SCTP_TCB_LOCK_ASSERT(stcb);
7605 switch (net->ro._l_addr.sa.sa_family) {
7608 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7613 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7618 goal_mtu = net->mtu;
7621 /* Need an allowance for the data chunk header too */
7622 goal_mtu -= sizeof(struct sctp_data_chunk);
7624 /* must make even word boundary */
7625 goal_mtu &= 0xfffffffc;
7626 if (asoc->locked_on_sending) {
7627 /* We are stuck on one stream until the message completes. */
7628 strq = asoc->locked_on_sending;
7631 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7634 while ((goal_mtu > 0) && strq) {
7637 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7638 &giveup, eeor_mode, &bail, so_locked);
7640 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7643 asoc->locked_on_sending = strq;
7644 if ((moved_how_much == 0) || (giveup) || bail)
7645 /* no more to move for now */
7648 asoc->locked_on_sending = NULL;
7649 if ((giveup) || bail) {
7652 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7657 total_moved += moved_how_much;
7658 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7659 goal_mtu &= 0xfffffffc;
7664 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7666 if (total_moved == 0) {
7667 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7668 (net == stcb->asoc.primary_destination)) {
7669 /* ran dry for primary network net */
7670 SCTP_STAT_INCR(sctps_primary_randry);
7671 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7672 /* ran dry with CMT on */
7673 SCTP_STAT_INCR(sctps_cmt_randry);
7679 sctp_fix_ecn_echo(struct sctp_association *asoc)
7681 struct sctp_tmit_chunk *chk;
7683 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7684 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7685 chk->sent = SCTP_DATAGRAM_UNSENT;
7691 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7693 struct sctp_association *asoc;
7694 struct sctp_tmit_chunk *chk;
7695 struct sctp_stream_queue_pending *sp;
7702 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7703 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7704 if (sp->net == net) {
7705 sctp_free_remote_addr(sp->net);
7710 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7711 if (chk->whoTo == net) {
7712 sctp_free_remote_addr(chk->whoTo);
7719 sctp_med_chunk_output(struct sctp_inpcb *inp,
7720 struct sctp_tcb *stcb,
7721 struct sctp_association *asoc,
7724 int control_only, int from_where,
7725 struct timeval *now, int *now_filled, int frag_point, int so_locked
7726 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7732 * Ok this is the generic chunk service queue. we must do the
7733 * following: - Service the stream queue that is next, moving any
7734 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7735 * LAST to the out queue in one pass) and assigning TSN's - Check to
7736 * see if the cwnd/rwnd allows any output, if so we go ahead and
7737 * fomulate and send the low level chunks. Making sure to combine
7738 * any control in the control chunk queue also.
7740 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7741 struct mbuf *outchain, *endoutchain;
7742 struct sctp_tmit_chunk *chk, *nchk;
7744 /* temp arrays for unlinking */
7745 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7746 int no_fragmentflg, error;
7747 unsigned int max_rwnd_per_dest, max_send_per_dest;
7748 int one_chunk, hbflag, skip_data_for_this_net;
7749 int asconf, cookie, no_out_cnt;
7750 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7751 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7753 uint32_t auth_offset = 0;
7754 struct sctp_auth_chunk *auth = NULL;
7755 uint16_t auth_keyid;
7756 int override_ok = 1;
7757 int skip_fill_up = 0;
7758 int data_auth_reqd = 0;
7761 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7767 auth_keyid = stcb->asoc.authinfo.active_keyid;
7769 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7770 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7771 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7776 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7778 * First lets prime the pump. For each destination, if there is room
7779 * in the flight size, attempt to pull an MTU's worth out of the
7780 * stream queues into the general send_queue
7782 #ifdef SCTP_AUDITING_ENABLED
7783 sctp_audit_log(0xC2, 2);
7785 SCTP_TCB_LOCK_ASSERT(stcb);
7787 if ((control_only) || (asoc->stream_reset_outstanding))
7792 /* Nothing to possible to send? */
7793 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7794 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7795 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7796 TAILQ_EMPTY(&asoc->send_queue) &&
7797 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7802 if (asoc->peers_rwnd == 0) {
7803 /* No room in peers rwnd */
7805 if (asoc->total_flight > 0) {
7806 /* we are allowed one chunk in flight */
7810 if (stcb->asoc.ecn_echo_cnt_onq) {
7811 /* Record where a sack goes, if any */
7812 if (no_data_chunks &&
7813 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7814 /* Nothing but ECNe to send - we don't do that */
7815 goto nothing_to_send;
7817 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7818 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7819 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7820 sack_goes_to = chk->whoTo;
7825 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7826 if (stcb->sctp_socket)
7827 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7829 max_send_per_dest = 0;
7830 if (no_data_chunks == 0) {
7831 /* How many non-directed chunks are there? */
7832 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7833 if (chk->whoTo == NULL) {
7835 * We already have non-directed chunks on
7836 * the queue, no need to do a fill-up.
7844 if ((no_data_chunks == 0) &&
7845 (skip_fill_up == 0) &&
7846 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7847 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7849 * This for loop we are in takes in each net, if
7850 * its's got space in cwnd and has data sent to it
7851 * (when CMT is off) then it calls
7852 * sctp_fill_outqueue for the net. This gets data on
7853 * the send queue for that network.
7855 * In sctp_fill_outqueue TSN's are assigned and data is
7856 * copied out of the stream buffers. Note mostly
7857 * copy by reference (we hope).
7859 net->window_probe = 0;
7860 if ((net != stcb->asoc.alternate) &&
7861 ((net->dest_state & SCTP_ADDR_PF) ||
7862 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7863 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7864 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7865 sctp_log_cwnd(stcb, net, 1,
7866 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7870 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7871 (net->flight_size == 0)) {
7872 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7874 if (net->flight_size >= net->cwnd) {
7875 /* skip this network, no room - can't fill */
7876 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7877 sctp_log_cwnd(stcb, net, 3,
7878 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7882 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7883 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7885 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7887 /* memory alloc failure */
7893 /* now service each destination and send out what we can for it */
7894 /* Nothing to send? */
7895 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7896 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7897 TAILQ_EMPTY(&asoc->send_queue)) {
7901 if (asoc->sctp_cmt_on_off > 0) {
7902 /* get the last start point */
7903 start_at = asoc->last_net_cmt_send_started;
7904 if (start_at == NULL) {
7905 /* null so to beginning */
7906 start_at = TAILQ_FIRST(&asoc->nets);
7908 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7909 if (start_at == NULL) {
7910 start_at = TAILQ_FIRST(&asoc->nets);
7913 asoc->last_net_cmt_send_started = start_at;
7915 start_at = TAILQ_FIRST(&asoc->nets);
7917 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7918 if (chk->whoTo == NULL) {
7919 if (asoc->alternate) {
7920 chk->whoTo = asoc->alternate;
7922 chk->whoTo = asoc->primary_destination;
7924 atomic_add_int(&chk->whoTo->ref_count, 1);
7927 old_start_at = NULL;
7928 again_one_more_time:
7929 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7930 /* how much can we send? */
7931 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7932 if (old_start_at && (old_start_at == net)) {
7933 /* through list ocmpletely. */
7937 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7938 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7939 (net->flight_size >= net->cwnd)) {
7941 * Nothing on control or asconf and flight is full,
7942 * we can skip even in the CMT case.
7947 endoutchain = outchain = NULL;
7950 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7951 skip_data_for_this_net = 1;
7953 skip_data_for_this_net = 0;
7955 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7957 * if we have a route and an ifp check to see if we
7958 * have room to send to this guy
7962 ifp = net->ro.ro_rt->rt_ifp;
7963 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
7964 SCTP_STAT_INCR(sctps_ifnomemqueued);
7965 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
7966 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
7971 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7974 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
7979 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
7989 if (mtu > asoc->peers_rwnd) {
7990 if (asoc->total_flight > 0) {
7991 /* We have a packet in flight somewhere */
7992 r_mtu = asoc->peers_rwnd;
7994 /* We are always allowed to send one MTU out */
8001 /************************/
8002 /* ASCONF transmission */
8003 /************************/
8004 /* Now first lets go through the asconf queue */
8005 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8006 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8009 if (chk->whoTo == NULL) {
8010 if (asoc->alternate == NULL) {
8011 if (asoc->primary_destination != net) {
8015 if (asoc->alternate != net) {
8020 if (chk->whoTo != net) {
8024 if (chk->data == NULL) {
8027 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8028 chk->sent != SCTP_DATAGRAM_RESEND) {
8032 * if no AUTH is yet included and this chunk
8033 * requires it, make sure to account for it. We
8034 * don't apply the size until the AUTH chunk is
8035 * actually added below in case there is no room for
8036 * this chunk. NOTE: we overload the use of "omtu"
8039 if ((auth == NULL) &&
8040 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8041 stcb->asoc.peer_auth_chunks)) {
8042 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8045 /* Here we do NOT factor the r_mtu */
8046 if ((chk->send_size < (int)(mtu - omtu)) ||
8047 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8049 * We probably should glom the mbuf chain
8050 * from the chk->data for control but the
8051 * problem is it becomes yet one more level
8052 * of tracking to do if for some reason
8053 * output fails. Then I have got to
8054 * reconstruct the merged control chain.. el
8055 * yucko.. for now we take the easy way and
8059 * Add an AUTH chunk, if chunk requires it
8060 * save the offset into the chain for AUTH
8062 if ((auth == NULL) &&
8063 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8064 stcb->asoc.peer_auth_chunks))) {
8065 outchain = sctp_add_auth_chunk(outchain,
8070 chk->rec.chunk_id.id);
8071 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8073 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8074 (int)chk->rec.chunk_id.can_take_data,
8075 chk->send_size, chk->copy_by_ref);
8076 if (outchain == NULL) {
8078 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8081 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8082 /* update our MTU size */
8083 if (mtu > (chk->send_size + omtu))
8084 mtu -= (chk->send_size + omtu);
8087 to_out += (chk->send_size + omtu);
8088 /* Do clear IP_DF ? */
8089 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8092 if (chk->rec.chunk_id.can_take_data)
8095 * set hb flag since we can use these for
8101 * should sysctl this: don't bundle data
8102 * with ASCONF since it requires AUTH
8105 chk->sent = SCTP_DATAGRAM_SENT;
8106 if (chk->whoTo == NULL) {
8108 atomic_add_int(&net->ref_count, 1);
8113 * Ok we are out of room but we can
8114 * output without effecting the
8115 * flight size since this little guy
8116 * is a control only packet.
8118 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8120 * do NOT clear the asconf flag as
8121 * it is used to do appropriate
8122 * source address selection.
8124 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8125 (struct sockaddr *)&net->ro._l_addr,
8126 outchain, auth_offset, auth,
8127 stcb->asoc.authinfo.active_keyid,
8128 no_fragmentflg, 0, asconf,
8129 inp->sctp_lport, stcb->rport,
8130 htonl(stcb->asoc.peer_vtag),
8131 net->port, so_locked, NULL, NULL))) {
8132 if (error == ENOBUFS) {
8133 asoc->ifp_had_enobuf = 1;
8134 SCTP_STAT_INCR(sctps_lowlevelerr);
8136 if (from_where == 0) {
8137 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8139 if (*now_filled == 0) {
8140 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8142 *now = net->last_sent_time;
8144 net->last_sent_time = *now;
8147 /* error, could not output */
8148 if (error == EHOSTUNREACH) {
8154 sctp_move_chunks_from_net(stcb, net);
8159 asoc->ifp_had_enobuf = 0;
8160 if (*now_filled == 0) {
8161 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8163 *now = net->last_sent_time;
8165 net->last_sent_time = *now;
8169 * increase the number we sent, if a
8170 * cookie is sent we don't tell them
8173 outchain = endoutchain = NULL;
8177 *num_out += ctl_cnt;
8178 /* recalc a clean slate and setup */
8179 switch (net->ro._l_addr.sa.sa_family) {
8182 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8187 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8200 /************************/
8201 /* Control transmission */
8202 /************************/
8203 /* Now first lets go through the control queue */
8204 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8205 if ((sack_goes_to) &&
8206 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8207 (chk->whoTo != sack_goes_to)) {
8209 * if we have a sack in queue, and we are
8210 * looking at an ecn echo that is NOT queued
8211 * to where the sack is going..
8213 if (chk->whoTo == net) {
8215 * Don't transmit it to where its
8216 * going (current net)
8219 } else if (sack_goes_to == net) {
8221 * But do transmit it to this
8224 goto skip_net_check;
8227 if (chk->whoTo == NULL) {
8228 if (asoc->alternate == NULL) {
8229 if (asoc->primary_destination != net) {
8233 if (asoc->alternate != net) {
8238 if (chk->whoTo != net) {
8243 if (chk->data == NULL) {
8246 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8248 * It must be unsent. Cookies and ASCONF's
8249 * hang around but there timers will force
8250 * when marked for resend.
8255 * if no AUTH is yet included and this chunk
8256 * requires it, make sure to account for it. We
8257 * don't apply the size until the AUTH chunk is
8258 * actually added below in case there is no room for
8259 * this chunk. NOTE: we overload the use of "omtu"
8262 if ((auth == NULL) &&
8263 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8264 stcb->asoc.peer_auth_chunks)) {
8265 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8268 /* Here we do NOT factor the r_mtu */
8269 if ((chk->send_size <= (int)(mtu - omtu)) ||
8270 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8272 * We probably should glom the mbuf chain
8273 * from the chk->data for control but the
8274 * problem is it becomes yet one more level
8275 * of tracking to do if for some reason
8276 * output fails. Then I have got to
8277 * reconstruct the merged control chain.. el
8278 * yucko.. for now we take the easy way and
8282 * Add an AUTH chunk, if chunk requires it
8283 * save the offset into the chain for AUTH
8285 if ((auth == NULL) &&
8286 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8287 stcb->asoc.peer_auth_chunks))) {
8288 outchain = sctp_add_auth_chunk(outchain,
8293 chk->rec.chunk_id.id);
8294 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8296 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8297 (int)chk->rec.chunk_id.can_take_data,
8298 chk->send_size, chk->copy_by_ref);
8299 if (outchain == NULL) {
8301 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8304 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8305 /* update our MTU size */
8306 if (mtu > (chk->send_size + omtu))
8307 mtu -= (chk->send_size + omtu);
8310 to_out += (chk->send_size + omtu);
8311 /* Do clear IP_DF ? */
8312 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8315 if (chk->rec.chunk_id.can_take_data)
8317 /* Mark things to be removed, if needed */
8318 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8319 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8320 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8321 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8322 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8323 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8324 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8325 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8326 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8327 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8328 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8329 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8332 /* remove these chunks at the end */
8333 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8334 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8335 /* turn off the timer */
8336 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8337 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8338 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8344 * Other chunks, since they have
8345 * timers running (i.e. COOKIE) we
8346 * just "trust" that it gets sent or
8350 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8353 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8355 * Increment ecne send count
8356 * here this means we may be
8357 * over-zealous in our
8358 * counting if the send
8359 * fails, but its the best
8360 * place to do it (we used
8361 * to do it in the queue of
8362 * the chunk, but that did
8363 * not tell how many times
8366 SCTP_STAT_INCR(sctps_sendecne);
8368 chk->sent = SCTP_DATAGRAM_SENT;
8369 if (chk->whoTo == NULL) {
8371 atomic_add_int(&net->ref_count, 1);
8377 * Ok we are out of room but we can
8378 * output without effecting the
8379 * flight size since this little guy
8380 * is a control only packet.
8383 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8385 * do NOT clear the asconf
8386 * flag as it is used to do
8387 * appropriate source
8388 * address selection.
8392 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8395 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8396 (struct sockaddr *)&net->ro._l_addr,
8399 stcb->asoc.authinfo.active_keyid,
8400 no_fragmentflg, 0, asconf,
8401 inp->sctp_lport, stcb->rport,
8402 htonl(stcb->asoc.peer_vtag),
8403 net->port, so_locked, NULL, NULL))) {
8404 if (error == ENOBUFS) {
8405 asoc->ifp_had_enobuf = 1;
8406 SCTP_STAT_INCR(sctps_lowlevelerr);
8408 if (from_where == 0) {
8409 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8411 /* error, could not output */
8413 if (*now_filled == 0) {
8414 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8416 *now = net->last_sent_time;
8418 net->last_sent_time = *now;
8422 if (error == EHOSTUNREACH) {
8428 sctp_move_chunks_from_net(stcb, net);
8433 asoc->ifp_had_enobuf = 0;
8434 /* Only HB or ASCONF advances time */
8436 if (*now_filled == 0) {
8437 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8439 *now = net->last_sent_time;
8441 net->last_sent_time = *now;
8446 * increase the number we sent, if a
8447 * cookie is sent we don't tell them
8450 outchain = endoutchain = NULL;
8454 *num_out += ctl_cnt;
8455 /* recalc a clean slate and setup */
8456 switch (net->ro._l_addr.sa.sa_family) {
8459 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8464 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8477 /* JRI: if dest is in PF state, do not send data to it */
8478 if ((asoc->sctp_cmt_on_off > 0) &&
8479 (net != stcb->asoc.alternate) &&
8480 (net->dest_state & SCTP_ADDR_PF)) {
8483 if (net->flight_size >= net->cwnd) {
8486 if ((asoc->sctp_cmt_on_off > 0) &&
8487 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8488 (net->flight_size > max_rwnd_per_dest)) {
8492 * We need a specific accounting for the usage of the send
8493 * buffer. We also need to check the number of messages per
8494 * net. For now, this is better than nothing and it disabled
8497 if ((asoc->sctp_cmt_on_off > 0) &&
8498 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8499 (max_send_per_dest > 0) &&
8500 (net->flight_size > max_send_per_dest)) {
8503 /*********************/
8504 /* Data transmission */
8505 /*********************/
8507 * if AUTH for DATA is required and no AUTH has been added
8508 * yet, account for this in the mtu now... if no data can be
8509 * bundled, this adjustment won't matter anyways since the
8510 * packet will be going out...
8512 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8513 stcb->asoc.peer_auth_chunks);
8514 if (data_auth_reqd && (auth == NULL)) {
8515 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8517 /* now lets add any data within the MTU constraints */
8518 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8520 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8521 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8527 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8528 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8538 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8539 (skip_data_for_this_net == 0)) ||
8541 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8542 if (no_data_chunks) {
8543 /* let only control go out */
8547 if (net->flight_size >= net->cwnd) {
8548 /* skip this net, no room for data */
8552 if ((chk->whoTo != NULL) &&
8553 (chk->whoTo != net)) {
8554 /* Don't send the chunk on this net */
8557 if (asoc->sctp_cmt_on_off == 0) {
8558 if ((asoc->alternate) &&
8559 (asoc->alternate != net) &&
8560 (chk->whoTo == NULL)) {
8562 } else if ((net != asoc->primary_destination) &&
8563 (asoc->alternate == NULL) &&
8564 (chk->whoTo == NULL)) {
8568 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8570 * strange, we have a chunk that is
8571 * to big for its destination and
8572 * yet no fragment ok flag.
8573 * Something went wrong when the
8574 * PMTU changed...we did not mark
8575 * this chunk for some reason?? I
8576 * will fix it here by letting IP
8577 * fragment it for now and printing
8578 * a warning. This really should not
8581 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8582 chk->send_size, mtu);
8583 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8585 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8586 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8587 struct sctp_data_chunk *dchkh;
8589 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8590 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8592 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8593 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8594 /* ok we will add this one */
8597 * Add an AUTH chunk, if chunk
8598 * requires it, save the offset into
8599 * the chain for AUTH
8601 if (data_auth_reqd) {
8603 outchain = sctp_add_auth_chunk(outchain,
8609 auth_keyid = chk->auth_keyid;
8611 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8612 } else if (override_ok) {
8617 auth_keyid = chk->auth_keyid;
8619 } else if (auth_keyid != chk->auth_keyid) {
8627 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8628 chk->send_size, chk->copy_by_ref);
8629 if (outchain == NULL) {
8630 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8631 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8632 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8635 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8638 /* upate our MTU size */
8639 /* Do clear IP_DF ? */
8640 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8643 /* unsigned subtraction of mtu */
8644 if (mtu > chk->send_size)
8645 mtu -= chk->send_size;
8648 /* unsigned subtraction of r_mtu */
8649 if (r_mtu > chk->send_size)
8650 r_mtu -= chk->send_size;
8654 to_out += chk->send_size;
8655 if ((to_out > mx_mtu) && no_fragmentflg) {
8657 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8659 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8663 chk->window_probe = 0;
8664 data_list[bundle_at++] = chk;
8665 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8668 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8669 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8670 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8672 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8674 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8675 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8685 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8687 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8688 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8689 data_list[0]->window_probe = 1;
8690 net->window_probe = 1;
8696 * Must be sent in order of the
8697 * TSN's (on a network)
8701 } /* for (chunk gather loop for this net) */
8702 } /* if asoc.state OPEN */
8704 /* Is there something to send for this destination? */
8706 /* We may need to start a control timer or two */
8708 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8711 * do NOT clear the asconf flag as it is
8712 * used to do appropriate source address
8717 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8720 /* must start a send timer if data is being sent */
8721 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8723 * no timer running on this destination
8726 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8728 /* Now send it, if there is anything to send :> */
8729 if ((error = sctp_lowlevel_chunk_output(inp,
8732 (struct sockaddr *)&net->ro._l_addr,
8740 inp->sctp_lport, stcb->rport,
8741 htonl(stcb->asoc.peer_vtag),
8742 net->port, so_locked, NULL, NULL))) {
8743 /* error, we could not output */
8744 if (error == ENOBUFS) {
8745 SCTP_STAT_INCR(sctps_lowlevelerr);
8746 asoc->ifp_had_enobuf = 1;
8748 if (from_where == 0) {
8749 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8751 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8753 if (*now_filled == 0) {
8754 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8756 *now = net->last_sent_time;
8758 net->last_sent_time = *now;
8762 if (error == EHOSTUNREACH) {
8764 * Destination went unreachable
8767 sctp_move_chunks_from_net(stcb, net);
8771 * I add this line to be paranoid. As far as
8772 * I can tell the continue, takes us back to
8773 * the top of the for, but just to make sure
8774 * I will reset these again here.
8776 ctl_cnt = bundle_at = 0;
8777 continue; /* This takes us back to the
8778 * for() for the nets. */
8780 asoc->ifp_had_enobuf = 0;
8785 if (bundle_at || hbflag) {
8786 /* For data/asconf and hb set time */
8787 if (*now_filled == 0) {
8788 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8790 *now = net->last_sent_time;
8792 net->last_sent_time = *now;
8796 *num_out += (ctl_cnt + bundle_at);
8799 /* setup for a RTO measurement */
8800 tsns_sent = data_list[0]->rec.data.TSN_seq;
8801 /* fill time if not already filled */
8802 if (*now_filled == 0) {
8803 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8805 *now = asoc->time_last_sent;
8807 asoc->time_last_sent = *now;
8809 if (net->rto_needed) {
8810 data_list[0]->do_rtt = 1;
8811 net->rto_needed = 0;
8813 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8814 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8820 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8821 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8824 if (old_start_at == NULL) {
8825 old_start_at = start_at;
8826 start_at = TAILQ_FIRST(&asoc->nets);
8828 goto again_one_more_time;
8831 * At the end there should be no NON timed chunks hanging on this
8834 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8835 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8837 if ((*num_out == 0) && (*reason_code == 0)) {
8842 sctp_clean_up_ctl(stcb, asoc, so_locked);
8847 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8850 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8851 * the control chunk queue.
8853 struct sctp_chunkhdr *hdr;
8854 struct sctp_tmit_chunk *chk;
8857 SCTP_TCB_LOCK_ASSERT(stcb);
8858 sctp_alloc_a_chunk(stcb, chk);
8861 sctp_m_freem(op_err);
8864 chk->copy_by_ref = 0;
8865 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT);
8866 if (op_err == NULL) {
8867 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8872 while (mat != NULL) {
8873 chk->send_size += SCTP_BUF_LEN(mat);
8874 mat = SCTP_BUF_NEXT(mat);
8876 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8877 chk->rec.chunk_id.can_take_data = 1;
8878 chk->sent = SCTP_DATAGRAM_UNSENT;
8881 chk->asoc = &stcb->asoc;
8884 hdr = mtod(op_err, struct sctp_chunkhdr *);
8885 hdr->chunk_type = SCTP_OPERATION_ERROR;
8886 hdr->chunk_flags = 0;
8887 hdr->chunk_length = htons(chk->send_size);
8888 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8891 chk->asoc->ctrl_queue_cnt++;
8895 sctp_send_cookie_echo(struct mbuf *m,
8897 struct sctp_tcb *stcb,
8898 struct sctp_nets *net)
8901 * pull out the cookie and put it at the front of the control chunk
8905 struct mbuf *cookie;
8906 struct sctp_paramhdr parm, *phdr;
8907 struct sctp_chunkhdr *hdr;
8908 struct sctp_tmit_chunk *chk;
8909 uint16_t ptype, plen;
8911 /* First find the cookie in the param area */
8913 at = offset + sizeof(struct sctp_init_chunk);
8915 SCTP_TCB_LOCK_ASSERT(stcb);
8917 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8921 ptype = ntohs(phdr->param_type);
8922 plen = ntohs(phdr->param_length);
8923 if (ptype == SCTP_STATE_COOKIE) {
8926 /* found the cookie */
8927 if ((pad = (plen % 4))) {
8930 cookie = SCTP_M_COPYM(m, at, plen, M_DONTWAIT);
8931 if (cookie == NULL) {
8935 #ifdef SCTP_MBUF_LOGGING
8936 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8939 for (mat = cookie; mat; mat = SCTP_BUF_NEXT(mat)) {
8940 if (SCTP_BUF_IS_EXTENDED(mat)) {
8941 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8948 at += SCTP_SIZE32(plen);
8950 if (cookie == NULL) {
8951 /* Did not find the cookie */
8954 /* ok, we got the cookie lets change it into a cookie echo chunk */
8956 /* first the change from param to cookie */
8957 hdr = mtod(cookie, struct sctp_chunkhdr *);
8958 hdr->chunk_type = SCTP_COOKIE_ECHO;
8959 hdr->chunk_flags = 0;
8960 /* get the chunk stuff now and place it in the FRONT of the queue */
8961 sctp_alloc_a_chunk(stcb, chk);
8964 sctp_m_freem(cookie);
8967 chk->copy_by_ref = 0;
8968 chk->send_size = plen;
8969 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8970 chk->rec.chunk_id.can_take_data = 0;
8971 chk->sent = SCTP_DATAGRAM_UNSENT;
8973 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8974 chk->asoc = &stcb->asoc;
8977 atomic_add_int(&chk->whoTo->ref_count, 1);
8978 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8979 chk->asoc->ctrl_queue_cnt++;
8984 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
8988 struct sctp_nets *net)
8991 * take a HB request and make it into a HB ack and send it.
8993 struct mbuf *outchain;
8994 struct sctp_chunkhdr *chdr;
8995 struct sctp_tmit_chunk *chk;
8999 /* must have a net pointer */
9002 outchain = SCTP_M_COPYM(m, offset, chk_length, M_DONTWAIT);
9003 if (outchain == NULL) {
9004 /* gak out of memory */
9007 #ifdef SCTP_MBUF_LOGGING
9008 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9011 for (mat = outchain; mat; mat = SCTP_BUF_NEXT(mat)) {
9012 if (SCTP_BUF_IS_EXTENDED(mat)) {
9013 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9018 chdr = mtod(outchain, struct sctp_chunkhdr *);
9019 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9020 chdr->chunk_flags = 0;
9021 if (chk_length % 4) {
9023 uint32_t cpthis = 0;
9026 padlen = 4 - (chk_length % 4);
9027 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9029 sctp_alloc_a_chunk(stcb, chk);
9032 sctp_m_freem(outchain);
9035 chk->copy_by_ref = 0;
9036 chk->send_size = chk_length;
9037 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9038 chk->rec.chunk_id.can_take_data = 1;
9039 chk->sent = SCTP_DATAGRAM_UNSENT;
9042 chk->asoc = &stcb->asoc;
9043 chk->data = outchain;
9045 atomic_add_int(&chk->whoTo->ref_count, 1);
9046 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9047 chk->asoc->ctrl_queue_cnt++;
9051 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9053 /* formulate and queue a cookie-ack back to sender */
9054 struct mbuf *cookie_ack;
9055 struct sctp_chunkhdr *hdr;
9056 struct sctp_tmit_chunk *chk;
9059 SCTP_TCB_LOCK_ASSERT(stcb);
9061 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
9062 if (cookie_ack == NULL) {
9066 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9067 sctp_alloc_a_chunk(stcb, chk);
9070 sctp_m_freem(cookie_ack);
9073 chk->copy_by_ref = 0;
9074 chk->send_size = sizeof(struct sctp_chunkhdr);
9075 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9076 chk->rec.chunk_id.can_take_data = 1;
9077 chk->sent = SCTP_DATAGRAM_UNSENT;
9080 chk->asoc = &stcb->asoc;
9081 chk->data = cookie_ack;
9082 if (chk->asoc->last_control_chunk_from != NULL) {
9083 chk->whoTo = chk->asoc->last_control_chunk_from;
9084 atomic_add_int(&chk->whoTo->ref_count, 1);
9088 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9089 hdr->chunk_type = SCTP_COOKIE_ACK;
9090 hdr->chunk_flags = 0;
9091 hdr->chunk_length = htons(chk->send_size);
9092 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9093 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9094 chk->asoc->ctrl_queue_cnt++;
9100 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9102 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9103 struct mbuf *m_shutdown_ack;
9104 struct sctp_shutdown_ack_chunk *ack_cp;
9105 struct sctp_tmit_chunk *chk;
9107 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9108 if (m_shutdown_ack == NULL) {
9112 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9113 sctp_alloc_a_chunk(stcb, chk);
9116 sctp_m_freem(m_shutdown_ack);
9119 chk->copy_by_ref = 0;
9120 chk->send_size = sizeof(struct sctp_chunkhdr);
9121 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9122 chk->rec.chunk_id.can_take_data = 1;
9123 chk->sent = SCTP_DATAGRAM_UNSENT;
9126 chk->asoc = &stcb->asoc;
9127 chk->data = m_shutdown_ack;
9130 atomic_add_int(&chk->whoTo->ref_count, 1);
9132 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9133 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9134 ack_cp->ch.chunk_flags = 0;
9135 ack_cp->ch.chunk_length = htons(chk->send_size);
9136 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9137 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9138 chk->asoc->ctrl_queue_cnt++;
9143 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9145 /* formulate and queue a SHUTDOWN to the sender */
9146 struct mbuf *m_shutdown;
9147 struct sctp_shutdown_chunk *shutdown_cp;
9148 struct sctp_tmit_chunk *chk;
9150 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9151 if (m_shutdown == NULL) {
9155 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9156 sctp_alloc_a_chunk(stcb, chk);
9159 sctp_m_freem(m_shutdown);
9162 chk->copy_by_ref = 0;
9163 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9164 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9165 chk->rec.chunk_id.can_take_data = 1;
9166 chk->sent = SCTP_DATAGRAM_UNSENT;
9169 chk->asoc = &stcb->asoc;
9170 chk->data = m_shutdown;
9173 atomic_add_int(&chk->whoTo->ref_count, 1);
9175 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9176 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9177 shutdown_cp->ch.chunk_flags = 0;
9178 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9179 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9180 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9181 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9182 chk->asoc->ctrl_queue_cnt++;
9187 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9190 * formulate and queue an ASCONF to the peer. ASCONF parameters
9191 * should be queued on the assoc queue.
9193 struct sctp_tmit_chunk *chk;
9194 struct mbuf *m_asconf;
9197 SCTP_TCB_LOCK_ASSERT(stcb);
9199 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9200 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9201 /* can't send a new one if there is one in flight already */
9204 /* compose an ASCONF chunk, maximum length is PMTU */
9205 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9206 if (m_asconf == NULL) {
9209 sctp_alloc_a_chunk(stcb, chk);
9212 sctp_m_freem(m_asconf);
9215 chk->copy_by_ref = 0;
9216 chk->data = m_asconf;
9217 chk->send_size = len;
9218 chk->rec.chunk_id.id = SCTP_ASCONF;
9219 chk->rec.chunk_id.can_take_data = 0;
9220 chk->sent = SCTP_DATAGRAM_UNSENT;
9222 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9223 chk->asoc = &stcb->asoc;
9226 atomic_add_int(&chk->whoTo->ref_count, 1);
9228 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9229 chk->asoc->ctrl_queue_cnt++;
9234 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9237 * formulate and queue a asconf-ack back to sender. the asconf-ack
9238 * must be stored in the tcb.
9240 struct sctp_tmit_chunk *chk;
9241 struct sctp_asconf_ack *ack, *latest_ack;
9243 struct sctp_nets *net = NULL;
9245 SCTP_TCB_LOCK_ASSERT(stcb);
9246 /* Get the latest ASCONF-ACK */
9247 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9248 if (latest_ack == NULL) {
9251 if (latest_ack->last_sent_to != NULL &&
9252 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9253 /* we're doing a retransmission */
9254 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9257 if (stcb->asoc.last_control_chunk_from == NULL) {
9258 if (stcb->asoc.alternate) {
9259 net = stcb->asoc.alternate;
9261 net = stcb->asoc.primary_destination;
9264 net = stcb->asoc.last_control_chunk_from;
9269 if (stcb->asoc.last_control_chunk_from == NULL) {
9270 if (stcb->asoc.alternate) {
9271 net = stcb->asoc.alternate;
9273 net = stcb->asoc.primary_destination;
9276 net = stcb->asoc.last_control_chunk_from;
9279 latest_ack->last_sent_to = net;
9281 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9282 if (ack->data == NULL) {
9285 /* copy the asconf_ack */
9286 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_DONTWAIT);
9287 if (m_ack == NULL) {
9288 /* couldn't copy it */
9291 #ifdef SCTP_MBUF_LOGGING
9292 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9295 for (mat = m_ack; mat; mat = SCTP_BUF_NEXT(mat)) {
9296 if (SCTP_BUF_IS_EXTENDED(mat)) {
9297 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9303 sctp_alloc_a_chunk(stcb, chk);
9307 sctp_m_freem(m_ack);
9310 chk->copy_by_ref = 0;
9314 atomic_add_int(&chk->whoTo->ref_count, 1);
9319 chk->send_size = ack->len;
9320 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9321 chk->rec.chunk_id.can_take_data = 1;
9322 chk->sent = SCTP_DATAGRAM_UNSENT;
9324 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */
9325 chk->asoc = &stcb->asoc;
9327 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9328 chk->asoc->ctrl_queue_cnt++;
9335 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9336 struct sctp_tcb *stcb,
9337 struct sctp_association *asoc,
9338 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9339 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9345 * send out one MTU of retransmission. If fast_retransmit is
9346 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9347 * rwnd. For a Cookie or Asconf in the control chunk queue we
9348 * retransmit them by themselves.
9350 * For data chunks we will pick out the lowest TSN's in the sent_queue
9351 * marked for resend and bundle them all together (up to a MTU of
9352 * destination). The address to send to should have been
9353 * selected/changed where the retransmission was marked (i.e. in FR
9354 * or t3-timeout routines).
9356 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9357 struct sctp_tmit_chunk *chk, *fwd;
9358 struct mbuf *m, *endofchain;
9359 struct sctp_nets *net = NULL;
9360 uint32_t tsns_sent = 0;
9361 int no_fragmentflg, bundle_at, cnt_thru;
9363 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9364 struct sctp_auth_chunk *auth = NULL;
9365 uint32_t auth_offset = 0;
9366 uint16_t auth_keyid;
9367 int override_ok = 1;
9368 int data_auth_reqd = 0;
9371 SCTP_TCB_LOCK_ASSERT(stcb);
9372 tmr_started = ctl_cnt = bundle_at = error = 0;
9377 endofchain = m = NULL;
9378 auth_keyid = stcb->asoc.authinfo.active_keyid;
9379 #ifdef SCTP_AUDITING_ENABLED
9380 sctp_audit_log(0xC3, 1);
9382 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9383 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9384 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9385 asoc->sent_queue_retran_cnt);
9386 asoc->sent_queue_cnt = 0;
9387 asoc->sent_queue_cnt_removeable = 0;
9388 /* send back 0/0 so we enter normal transmission */
9392 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9393 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9394 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9395 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9396 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9399 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9400 if (chk != asoc->str_reset) {
9402 * not eligible for retran if its
9409 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9413 * Add an AUTH chunk, if chunk requires it save the
9414 * offset into the chain for AUTH
9416 if ((auth == NULL) &&
9417 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9418 stcb->asoc.peer_auth_chunks))) {
9419 m = sctp_add_auth_chunk(m, &endofchain,
9420 &auth, &auth_offset,
9422 chk->rec.chunk_id.id);
9423 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9425 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9431 /* do we have control chunks to retransmit? */
9433 /* Start a timer no matter if we suceed or fail */
9434 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9435 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9436 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9437 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9438 chk->snd_count++; /* update our count */
9439 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9440 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9441 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9442 no_fragmentflg, 0, 0,
9443 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9444 chk->whoTo->port, so_locked, NULL, NULL))) {
9445 SCTP_STAT_INCR(sctps_lowlevelerr);
9452 * We don't want to mark the net->sent time here since this
9453 * we use this for HB and retrans cannot measure RTT
9455 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9457 chk->sent = SCTP_DATAGRAM_SENT;
9458 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9462 /* Clean up the fwd-tsn list */
9463 sctp_clean_up_ctl(stcb, asoc, so_locked);
9468 * Ok, it is just data retransmission we need to do or that and a
9469 * fwd-tsn with it all.
9471 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9472 return (SCTP_RETRAN_DONE);
9474 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9475 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9476 /* not yet open, resend the cookie and that is it */
9479 #ifdef SCTP_AUDITING_ENABLED
9480 sctp_auditing(20, inp, stcb, NULL);
9482 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9483 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9484 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9485 /* No, not sent to this net or not ready for rtx */
9488 if (chk->data == NULL) {
9489 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9490 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9493 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9494 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9495 /* Gak, we have exceeded max unlucky retran, abort! */
9496 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9498 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9499 atomic_add_int(&stcb->asoc.refcnt, 1);
9500 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked);
9501 SCTP_TCB_LOCK(stcb);
9502 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9503 return (SCTP_RETRAN_EXIT);
9505 /* pick up the net */
9507 switch (net->ro._l_addr.sa.sa_family) {
9510 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9515 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9524 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9525 /* No room in peers rwnd */
9528 tsn = asoc->last_acked_seq + 1;
9529 if (tsn == chk->rec.data.TSN_seq) {
9531 * we make a special exception for this
9532 * case. The peer has no rwnd but is missing
9533 * the lowest chunk.. which is probably what
9534 * is holding up the rwnd.
9536 goto one_chunk_around;
9541 if (asoc->peers_rwnd < mtu) {
9543 if ((asoc->peers_rwnd == 0) &&
9544 (asoc->total_flight == 0)) {
9545 chk->window_probe = 1;
9546 chk->whoTo->window_probe = 1;
9549 #ifdef SCTP_AUDITING_ENABLED
9550 sctp_audit_log(0xC3, 2);
9554 net->fast_retran_ip = 0;
9555 if (chk->rec.data.doing_fast_retransmit == 0) {
9557 * if no FR in progress skip destination that have
9558 * flight_size > cwnd.
9560 if (net->flight_size >= net->cwnd) {
9565 * Mark the destination net to have FR recovery
9569 net->fast_retran_ip = 1;
9573 * if no AUTH is yet included and this chunk requires it,
9574 * make sure to account for it. We don't apply the size
9575 * until the AUTH chunk is actually added below in case
9576 * there is no room for this chunk.
9578 if (data_auth_reqd && (auth == NULL)) {
9579 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9583 if ((chk->send_size <= (mtu - dmtu)) ||
9584 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9585 /* ok we will add this one */
9586 if (data_auth_reqd) {
9588 m = sctp_add_auth_chunk(m,
9594 auth_keyid = chk->auth_keyid;
9596 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9597 } else if (override_ok) {
9598 auth_keyid = chk->auth_keyid;
9600 } else if (chk->auth_keyid != auth_keyid) {
9601 /* different keyid, so done bundling */
9605 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9607 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9610 /* Do clear IP_DF ? */
9611 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9614 /* upate our MTU size */
9615 if (mtu > (chk->send_size + dmtu))
9616 mtu -= (chk->send_size + dmtu);
9619 data_list[bundle_at++] = chk;
9620 if (one_chunk && (asoc->total_flight <= 0)) {
9621 SCTP_STAT_INCR(sctps_windowprobed);
9624 if (one_chunk == 0) {
9626 * now are there anymore forward from chk to pick
9629 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9630 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9631 /* Nope, not for retran */
9634 if (fwd->whoTo != net) {
9635 /* Nope, not the net in question */
9638 if (data_auth_reqd && (auth == NULL)) {
9639 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9642 if (fwd->send_size <= (mtu - dmtu)) {
9643 if (data_auth_reqd) {
9645 m = sctp_add_auth_chunk(m,
9651 auth_keyid = fwd->auth_keyid;
9653 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9654 } else if (override_ok) {
9655 auth_keyid = fwd->auth_keyid;
9657 } else if (fwd->auth_keyid != auth_keyid) {
9665 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9667 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9670 /* Do clear IP_DF ? */
9671 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9674 /* upate our MTU size */
9675 if (mtu > (fwd->send_size + dmtu))
9676 mtu -= (fwd->send_size + dmtu);
9679 data_list[bundle_at++] = fwd;
9680 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9684 /* can't fit so we are done */
9689 /* Is there something to send for this destination? */
9692 * No matter if we fail/or suceed we should start a
9693 * timer. A failure is like a lost IP packet :-)
9695 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9697 * no timer running on this destination
9700 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9703 /* Now lets send it, if there is anything to send :> */
9704 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9705 (struct sockaddr *)&net->ro._l_addr, m,
9706 auth_offset, auth, auth_keyid,
9707 no_fragmentflg, 0, 0,
9708 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9709 net->port, so_locked, NULL, NULL))) {
9710 /* error, we could not output */
9711 SCTP_STAT_INCR(sctps_lowlevelerr);
9719 * We don't want to mark the net->sent time here
9720 * since this we use this for HB and retrans cannot
9723 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9725 /* For auto-close */
9727 if (*now_filled == 0) {
9728 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9729 *now = asoc->time_last_sent;
9732 asoc->time_last_sent = *now;
9734 *cnt_out += bundle_at;
9735 #ifdef SCTP_AUDITING_ENABLED
9736 sctp_audit_log(0xC4, bundle_at);
9739 tsns_sent = data_list[0]->rec.data.TSN_seq;
9741 for (i = 0; i < bundle_at; i++) {
9742 SCTP_STAT_INCR(sctps_sendretransdata);
9743 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9745 * When we have a revoked data, and we
9746 * retransmit it, then we clear the revoked
9747 * flag since this flag dictates if we
9748 * subtracted from the fs
9750 if (data_list[i]->rec.data.chunk_was_revoked) {
9751 /* Deflate the cwnd */
9752 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9753 data_list[i]->rec.data.chunk_was_revoked = 0;
9755 data_list[i]->snd_count++;
9756 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9757 /* record the time */
9758 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9759 if (data_list[i]->book_size_scale) {
9761 * need to double the book size on
9764 data_list[i]->book_size_scale = 0;
9766 * Since we double the booksize, we
9767 * must also double the output queue
9768 * size, since this get shrunk when
9769 * we free by this amount.
9771 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9772 data_list[i]->book_size *= 2;
9776 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9777 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9778 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9780 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9781 (uint32_t) (data_list[i]->send_size +
9782 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9784 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9785 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9786 data_list[i]->whoTo->flight_size,
9787 data_list[i]->book_size,
9788 (uintptr_t) data_list[i]->whoTo,
9789 data_list[i]->rec.data.TSN_seq);
9791 sctp_flight_size_increase(data_list[i]);
9792 sctp_total_flight_increase(stcb, data_list[i]);
9793 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9794 /* SWS sender side engages */
9795 asoc->peers_rwnd = 0;
9798 (data_list[i]->rec.data.doing_fast_retransmit)) {
9799 SCTP_STAT_INCR(sctps_sendfastretrans);
9800 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9801 (tmr_started == 0)) {
9803 * ok we just fast-retrans'd
9804 * the lowest TSN, i.e the
9805 * first on the list. In
9806 * this case we want to give
9807 * some more time to get a
9808 * SACK back without a
9811 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9812 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
9813 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9817 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9818 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9820 #ifdef SCTP_AUDITING_ENABLED
9821 sctp_auditing(21, inp, stcb, NULL);
9827 if (asoc->sent_queue_retran_cnt <= 0) {
9828 /* all done we have no more to retran */
9829 asoc->sent_queue_retran_cnt = 0;
9833 /* No more room in rwnd */
9836 /* stop the for loop here. we sent out a packet */
9843 sctp_timer_validation(struct sctp_inpcb *inp,
9844 struct sctp_tcb *stcb,
9845 struct sctp_association *asoc)
9847 struct sctp_nets *net;
9849 /* Validate that a timer is running somewhere */
9850 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9851 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9852 /* Here is a timer */
9856 SCTP_TCB_LOCK_ASSERT(stcb);
9857 /* Gak, we did not have a timer somewhere */
9858 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9859 if (asoc->alternate) {
9860 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9862 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9868 sctp_chunk_output(struct sctp_inpcb *inp,
9869 struct sctp_tcb *stcb,
9872 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9878 * Ok this is the generic chunk service queue. we must do the
9880 * - See if there are retransmits pending, if so we must
9882 * - Service the stream queue that is next, moving any
9883 * message (note I must get a complete message i.e.
9884 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9886 * - Check to see if the cwnd/rwnd allows any output, if so we
9887 * go ahead and fomulate and send the low level chunks. Making sure
9888 * to combine any control in the control chunk queue also.
9890 struct sctp_association *asoc;
9891 struct sctp_nets *net;
9892 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0;
9893 unsigned int burst_cnt = 0;
9897 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9900 unsigned int tot_frs = 0;
9903 /* The Nagle algorithm is only applied when handling a send call. */
9904 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9905 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9913 SCTP_TCB_LOCK_ASSERT(stcb);
9915 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9917 if ((un_sent <= 0) &&
9918 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9919 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9920 (asoc->sent_queue_retran_cnt == 0)) {
9921 /* Nothing to do unless there is something to be sent left */
9925 * Do we have something to send, data or control AND a sack timer
9926 * running, if so piggy-back the sack.
9928 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9929 sctp_send_sack(stcb, so_locked);
9930 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9932 while (asoc->sent_queue_retran_cnt) {
9934 * Ok, it is retransmission time only, we send out only ONE
9935 * packet with a single call off to the retran code.
9937 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9939 * Special hook for handling cookiess discarded
9940 * by peer that carried data. Send cookie-ack only
9941 * and then the next call with get the retran's.
9943 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9945 &now, &now_filled, frag_point, so_locked);
9947 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9948 /* if its not from a HB then do it */
9950 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9956 * its from any other place, we don't allow retran
9957 * output (only control)
9962 /* Can't send anymore */
9964 * now lets push out control by calling med-level
9965 * output once. this assures that we WILL send HB's
9968 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9970 &now, &now_filled, frag_point, so_locked);
9971 #ifdef SCTP_AUDITING_ENABLED
9972 sctp_auditing(8, inp, stcb, NULL);
9974 sctp_timer_validation(inp, stcb, asoc);
9979 * The count was off.. retran is not happening so do
9980 * the normal retransmission.
9982 #ifdef SCTP_AUDITING_ENABLED
9983 sctp_auditing(9, inp, stcb, NULL);
9985 if (ret == SCTP_RETRAN_EXIT) {
9990 if (from_where == SCTP_OUTPUT_FROM_T3) {
9991 /* Only one transmission allowed out of a timeout */
9992 #ifdef SCTP_AUDITING_ENABLED
9993 sctp_auditing(10, inp, stcb, NULL);
9995 /* Push out any control */
9996 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
9997 &now, &now_filled, frag_point, so_locked);
10000 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10001 /* Hit FR burst limit */
10004 if ((num_out == 0) && (ret == 0)) {
10005 /* No more retrans to send */
10009 #ifdef SCTP_AUDITING_ENABLED
10010 sctp_auditing(12, inp, stcb, NULL);
10012 /* Check for bad destinations, if they exist move chunks around. */
10013 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10014 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10016 * if possible move things off of this address we
10017 * still may send below due to the dormant state but
10018 * we try to find an alternate address to send to
10019 * and if we have one we move all queued data on the
10020 * out wheel to this alternate address.
10022 if (net->ref_count > 1)
10023 sctp_move_chunks_from_net(stcb, net);
10026 * if ((asoc->sat_network) || (net->addr_is_local))
10027 * { burst_limit = asoc->max_burst *
10028 * SCTP_SAT_NETWORK_BURST_INCR; }
10030 if (asoc->max_burst > 0) {
10031 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10032 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10034 * JRS - Use the congestion
10035 * control given in the
10036 * congestion control module
10038 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10039 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10040 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10042 SCTP_STAT_INCR(sctps_maxburstqueued);
10044 net->fast_retran_ip = 0;
10046 if (net->flight_size == 0) {
10048 * Should be decaying the
10060 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10061 &reason_code, 0, from_where,
10062 &now, &now_filled, frag_point, so_locked);
10064 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10065 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10066 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10068 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10069 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10070 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10074 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10076 tot_out += num_out;
10078 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10079 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10080 if (num_out == 0) {
10081 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10086 * When the Nagle algorithm is used, look at how
10087 * much is unsent, then if its smaller than an MTU
10088 * and we have data in flight we stop, except if we
10089 * are handling a fragmented user message.
10091 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10092 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10093 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10094 (stcb->asoc.total_flight > 0) &&
10095 ((stcb->asoc.locked_on_sending == NULL) ||
10096 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10100 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10101 TAILQ_EMPTY(&asoc->send_queue) &&
10102 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10103 /* Nothing left to send */
10106 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10107 /* Nothing left to send */
10110 } while (num_out &&
10111 ((asoc->max_burst == 0) ||
10112 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10113 (burst_cnt < asoc->max_burst)));
10115 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10116 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10117 SCTP_STAT_INCR(sctps_maxburstqueued);
10118 asoc->burst_limit_applied = 1;
10119 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10120 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10123 asoc->burst_limit_applied = 0;
10126 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10127 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10129 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10133 * Now we need to clean up the control chunk chain if a ECNE is on
10134 * it. It must be marked as UNSENT again so next call will continue
10135 * to send it until such time that we get a CWR, to remove it.
10137 if (stcb->asoc.ecn_echo_cnt_onq)
10138 sctp_fix_ecn_echo(asoc);
10145 struct sctp_inpcb *inp,
10147 struct sockaddr *addr,
10148 struct mbuf *control,
10153 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10156 if (inp->sctp_socket == NULL) {
10157 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10160 return (sctp_sosend(inp->sctp_socket,
10162 (struct uio *)NULL,
10170 send_forward_tsn(struct sctp_tcb *stcb,
10171 struct sctp_association *asoc)
10173 struct sctp_tmit_chunk *chk;
10174 struct sctp_forward_tsn_chunk *fwdtsn;
10175 uint32_t advance_peer_ack_point;
10177 SCTP_TCB_LOCK_ASSERT(stcb);
10178 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10179 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10180 /* mark it to unsent */
10181 chk->sent = SCTP_DATAGRAM_UNSENT;
10182 chk->snd_count = 0;
10183 /* Do we correct its output location? */
10185 sctp_free_remote_addr(chk->whoTo);
10188 goto sctp_fill_in_rest;
10191 /* Ok if we reach here we must build one */
10192 sctp_alloc_a_chunk(stcb, chk);
10196 asoc->fwd_tsn_cnt++;
10197 chk->copy_by_ref = 0;
10198 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10199 chk->rec.chunk_id.can_take_data = 0;
10202 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
10203 if (chk->data == NULL) {
10204 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10207 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10208 chk->sent = SCTP_DATAGRAM_UNSENT;
10209 chk->snd_count = 0;
10210 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10211 asoc->ctrl_queue_cnt++;
10214 * Here we go through and fill out the part that deals with
10215 * stream/seq of the ones we skip.
10217 SCTP_BUF_LEN(chk->data) = 0;
10219 struct sctp_tmit_chunk *at, *tp1, *last;
10220 struct sctp_strseq *strseq;
10221 unsigned int cnt_of_space, i, ovh;
10222 unsigned int space_needed;
10223 unsigned int cnt_of_skipped = 0;
10225 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10226 if (at->sent != SCTP_FORWARD_TSN_SKIP) {
10227 /* no more to look at */
10230 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10231 /* We don't report these */
10236 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10237 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10239 cnt_of_space = M_TRAILINGSPACE(chk->data);
10241 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10242 ovh = SCTP_MIN_OVERHEAD;
10244 ovh = SCTP_MIN_V4_OVERHEAD;
10246 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10247 /* trim to a mtu size */
10248 cnt_of_space = asoc->smallest_mtu - ovh;
10250 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10251 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10252 0xff, 0, cnt_of_skipped,
10253 asoc->advanced_peer_ack_point);
10256 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10257 if (cnt_of_space < space_needed) {
10259 * ok we must trim down the chunk by lowering the
10260 * advance peer ack point.
10262 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10263 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10264 0xff, 0xff, cnt_of_space,
10267 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10268 cnt_of_skipped /= sizeof(struct sctp_strseq);
10270 * Go through and find the TSN that will be the one
10273 at = TAILQ_FIRST(&asoc->sent_queue);
10275 for (i = 0; i < cnt_of_skipped; i++) {
10276 tp1 = TAILQ_NEXT(at, sctp_next);
10283 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10284 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10285 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10286 asoc->advanced_peer_ack_point);
10290 * last now points to last one I can report, update
10294 advance_peer_ack_point = last->rec.data.TSN_seq;
10295 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10296 cnt_of_skipped * sizeof(struct sctp_strseq);
10298 chk->send_size = space_needed;
10299 /* Setup the chunk */
10300 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10301 fwdtsn->ch.chunk_length = htons(chk->send_size);
10302 fwdtsn->ch.chunk_flags = 0;
10303 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10304 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10305 SCTP_BUF_LEN(chk->data) = chk->send_size;
10308 * Move pointer to after the fwdtsn and transfer to the
10311 strseq = (struct sctp_strseq *)fwdtsn;
10313 * Now populate the strseq list. This is done blindly
10314 * without pulling out duplicate stream info. This is
10315 * inefficent but won't harm the process since the peer will
10316 * look at these in sequence and will thus release anything.
10317 * It could mean we exceed the PMTU and chop off some that
10318 * we could have included.. but this is unlikely (aka 1432/4
10319 * would mean 300+ stream seq's would have to be reported in
10320 * one FWD-TSN. With a bit of work we can later FIX this to
10321 * optimize and pull out duplcates.. but it does add more
10322 * overhead. So for now... not!
10324 at = TAILQ_FIRST(&asoc->sent_queue);
10325 for (i = 0; i < cnt_of_skipped; i++) {
10326 tp1 = TAILQ_NEXT(at, sctp_next);
10329 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10330 /* We don't report these */
10335 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10336 at->rec.data.fwd_tsn_cnt = 0;
10338 strseq->stream = ntohs(at->rec.data.stream_number);
10339 strseq->sequence = ntohs(at->rec.data.stream_seq);
10348 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10349 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10355 * Queue up a SACK or NR-SACK in the control queue.
10356 * We must first check to see if a SACK or NR-SACK is
10357 * somehow on the control queue.
10358 * If so, we will take and and remove the old one.
10360 struct sctp_association *asoc;
10361 struct sctp_tmit_chunk *chk, *a_chk;
10362 struct sctp_sack_chunk *sack;
10363 struct sctp_nr_sack_chunk *nr_sack;
10364 struct sctp_gap_ack_block *gap_descriptor;
10365 struct sack_track *selector;
10370 int limit_reached = 0;
10371 unsigned int i, siz, j;
10372 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10375 uint32_t highest_tsn;
10380 if ((stcb->asoc.sctp_nr_sack_on_off == 1) &&
10381 (stcb->asoc.peer_supports_nr_sack == 1)) {
10382 type = SCTP_NR_SELECTIVE_ACK;
10384 type = SCTP_SELECTIVE_ACK;
10387 asoc = &stcb->asoc;
10388 SCTP_TCB_LOCK_ASSERT(stcb);
10389 if (asoc->last_data_chunk_from == NULL) {
10390 /* Hmm we never received anything */
10393 sctp_slide_mapping_arrays(stcb);
10394 sctp_set_rwnd(stcb, asoc);
10395 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10396 if (chk->rec.chunk_id.id == type) {
10397 /* Hmm, found a sack already on queue, remove it */
10398 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10399 asoc->ctrl_queue_cnt--;
10402 sctp_m_freem(a_chk->data);
10403 a_chk->data = NULL;
10405 if (a_chk->whoTo) {
10406 sctp_free_remote_addr(a_chk->whoTo);
10407 a_chk->whoTo = NULL;
10412 if (a_chk == NULL) {
10413 sctp_alloc_a_chunk(stcb, a_chk);
10414 if (a_chk == NULL) {
10415 /* No memory so we drop the idea, and set a timer */
10416 if (stcb->asoc.delayed_ack) {
10417 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10418 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10419 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10420 stcb->sctp_ep, stcb, NULL);
10422 stcb->asoc.send_sack = 1;
10426 a_chk->copy_by_ref = 0;
10427 a_chk->rec.chunk_id.id = type;
10428 a_chk->rec.chunk_id.can_take_data = 1;
10430 /* Clear our pkt counts */
10431 asoc->data_pkts_seen = 0;
10433 a_chk->asoc = asoc;
10434 a_chk->snd_count = 0;
10435 a_chk->send_size = 0; /* fill in later */
10436 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10437 a_chk->whoTo = NULL;
10439 if ((asoc->numduptsns) ||
10440 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) {
10442 * Ok, we have some duplicates or the destination for the
10443 * sack is unreachable, lets see if we can select an
10444 * alternate than asoc->last_data_chunk_from
10446 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) &&
10447 (asoc->used_alt_onsack > asoc->numnets)) {
10448 /* We used an alt last time, don't this time */
10449 a_chk->whoTo = NULL;
10451 asoc->used_alt_onsack++;
10452 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10454 if (a_chk->whoTo == NULL) {
10455 /* Nope, no alternate */
10456 a_chk->whoTo = asoc->last_data_chunk_from;
10457 asoc->used_alt_onsack = 0;
10461 * No duplicates so we use the last place we received data
10464 asoc->used_alt_onsack = 0;
10465 a_chk->whoTo = asoc->last_data_chunk_from;
10467 if (a_chk->whoTo) {
10468 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10470 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10471 highest_tsn = asoc->highest_tsn_inside_map;
10473 highest_tsn = asoc->highest_tsn_inside_nr_map;
10475 if (highest_tsn == asoc->cumulative_tsn) {
10477 if (type == SCTP_SELECTIVE_ACK) {
10478 space_req = sizeof(struct sctp_sack_chunk);
10480 space_req = sizeof(struct sctp_nr_sack_chunk);
10483 /* gaps get a cluster */
10484 space_req = MCLBYTES;
10486 /* Ok now lets formulate a MBUF with our sack */
10487 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_DONTWAIT, 1, MT_DATA);
10488 if ((a_chk->data == NULL) ||
10489 (a_chk->whoTo == NULL)) {
10490 /* rats, no mbuf memory */
10492 /* was a problem with the destination */
10493 sctp_m_freem(a_chk->data);
10494 a_chk->data = NULL;
10496 sctp_free_a_chunk(stcb, a_chk, so_locked);
10497 /* sa_ignore NO_NULL_CHK */
10498 if (stcb->asoc.delayed_ack) {
10499 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10500 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
10501 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10502 stcb->sctp_ep, stcb, NULL);
10504 stcb->asoc.send_sack = 1;
10508 /* ok, lets go through and fill it in */
10509 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10510 space = M_TRAILINGSPACE(a_chk->data);
10511 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10512 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10514 limit = mtod(a_chk->data, caddr_t);
10519 if ((asoc->sctp_cmt_on_off > 0) &&
10520 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10522 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10523 * received, then set high bit to 1, else 0. Reset
10526 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10527 asoc->cmt_dac_pkts_rcvd = 0;
10529 #ifdef SCTP_ASOCLOG_OF_TSNS
10530 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10531 stcb->asoc.cumack_log_atsnt++;
10532 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10533 stcb->asoc.cumack_log_atsnt = 0;
10536 /* reset the readers interpretation */
10537 stcb->freed_by_sorcv_sincelast = 0;
10539 if (type == SCTP_SELECTIVE_ACK) {
10540 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10542 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10543 if (highest_tsn > asoc->mapping_array_base_tsn) {
10544 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10546 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10550 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10551 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10552 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10553 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10555 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10559 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10562 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10564 if (((type == SCTP_SELECTIVE_ACK) &&
10565 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10566 ((type == SCTP_NR_SELECTIVE_ACK) &&
10567 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10568 /* we have a gap .. maybe */
10569 for (i = 0; i < siz; i++) {
10570 tsn_map = asoc->mapping_array[i];
10571 if (type == SCTP_SELECTIVE_ACK) {
10572 tsn_map |= asoc->nr_mapping_array[i];
10576 * Clear all bits corresponding to TSNs
10577 * smaller or equal to the cumulative TSN.
10579 tsn_map &= (~0 << (1 - offset));
10581 selector = &sack_array[tsn_map];
10582 if (mergeable && selector->right_edge) {
10584 * Backup, left and right edges were ok to
10590 if (selector->num_entries == 0)
10593 for (j = 0; j < selector->num_entries; j++) {
10594 if (mergeable && selector->right_edge) {
10596 * do a merge by NOT setting
10602 * no merge, set the left
10606 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10608 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10611 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10617 if (selector->left_edge) {
10621 if (limit_reached) {
10622 /* Reached the limit stop */
10628 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10629 (limit_reached == 0)) {
10633 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10634 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10636 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10639 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10642 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10644 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10645 /* we have a gap .. maybe */
10646 for (i = 0; i < siz; i++) {
10647 tsn_map = asoc->nr_mapping_array[i];
10650 * Clear all bits corresponding to
10651 * TSNs smaller or equal to the
10654 tsn_map &= (~0 << (1 - offset));
10656 selector = &sack_array[tsn_map];
10657 if (mergeable && selector->right_edge) {
10659 * Backup, left and right edges were
10662 num_nr_gap_blocks--;
10665 if (selector->num_entries == 0)
10668 for (j = 0; j < selector->num_entries; j++) {
10669 if (mergeable && selector->right_edge) {
10671 * do a merge by NOT
10678 * no merge, set the
10682 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10684 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10685 num_nr_gap_blocks++;
10687 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10693 if (selector->left_edge) {
10697 if (limit_reached) {
10698 /* Reached the limit stop */
10705 /* now we must add any dups we are going to report. */
10706 if ((limit_reached == 0) && (asoc->numduptsns)) {
10707 dup = (uint32_t *) gap_descriptor;
10708 for (i = 0; i < asoc->numduptsns; i++) {
10709 *dup = htonl(asoc->dup_tsns[i]);
10712 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10717 asoc->numduptsns = 0;
10720 * now that the chunk is prepared queue it to the control chunk
10723 if (type == SCTP_SELECTIVE_ACK) {
10724 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10725 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10726 num_dups * sizeof(int32_t);
10727 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10728 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10729 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10730 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10731 sack->sack.num_dup_tsns = htons(num_dups);
10732 sack->ch.chunk_type = type;
10733 sack->ch.chunk_flags = flags;
10734 sack->ch.chunk_length = htons(a_chk->send_size);
10736 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10737 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10738 num_dups * sizeof(int32_t);
10739 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10740 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10741 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10742 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10743 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10744 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10745 nr_sack->nr_sack.reserved = 0;
10746 nr_sack->ch.chunk_type = type;
10747 nr_sack->ch.chunk_flags = flags;
10748 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10750 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10751 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10752 asoc->ctrl_queue_cnt++;
10753 asoc->send_sack = 0;
10754 SCTP_STAT_INCR(sctps_sendsacks);
10759 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10760 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10765 struct mbuf *m_abort;
10766 struct mbuf *m_out = NULL, *m_end = NULL;
10767 struct sctp_abort_chunk *abort = NULL;
10769 uint32_t auth_offset = 0;
10770 struct sctp_auth_chunk *auth = NULL;
10771 struct sctp_nets *net;
10774 * Add an AUTH chunk, if chunk requires it and save the offset into
10775 * the chain for AUTH
10777 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10778 stcb->asoc.peer_auth_chunks)) {
10779 m_out = sctp_add_auth_chunk(m_out, &m_end, &auth, &auth_offset,
10780 stcb, SCTP_ABORT_ASSOCIATION);
10781 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10783 SCTP_TCB_LOCK_ASSERT(stcb);
10784 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
10785 if (m_abort == NULL) {
10788 sctp_m_freem(m_out);
10791 /* link in any error */
10792 SCTP_BUF_NEXT(m_abort) = operr;
10799 sz += SCTP_BUF_LEN(n);
10800 n = SCTP_BUF_NEXT(n);
10803 SCTP_BUF_LEN(m_abort) = sizeof(*abort);
10804 if (m_out == NULL) {
10805 /* NO Auth chunk prepended, so reserve space in front */
10806 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10809 /* Put AUTH chunk at the front of the chain */
10810 SCTP_BUF_NEXT(m_end) = m_abort;
10812 if (stcb->asoc.alternate) {
10813 net = stcb->asoc.alternate;
10815 net = stcb->asoc.primary_destination;
10817 /* fill in the ABORT chunk */
10818 abort = mtod(m_abort, struct sctp_abort_chunk *);
10819 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10820 abort->ch.chunk_flags = 0;
10821 abort->ch.chunk_length = htons(sizeof(*abort) + sz);
10823 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10824 (struct sockaddr *)&net->ro._l_addr,
10825 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10826 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
10827 stcb->asoc.primary_destination->port, so_locked, NULL, NULL);
10828 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10832 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10833 struct sctp_nets *net,
10836 /* formulate and SEND a SHUTDOWN-COMPLETE */
10837 struct mbuf *m_shutdown_comp;
10838 struct sctp_shutdown_complete_chunk *shutdown_complete;
10842 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
10843 if (m_shutdown_comp == NULL) {
10847 if (reflect_vtag) {
10848 flags = SCTP_HAD_NO_TCB;
10849 vtag = stcb->asoc.my_vtag;
10852 vtag = stcb->asoc.peer_vtag;
10854 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10855 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10856 shutdown_complete->ch.chunk_flags = flags;
10857 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10858 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10859 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10860 (struct sockaddr *)&net->ro._l_addr,
10861 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10862 stcb->sctp_ep->sctp_lport, stcb->rport,
10864 net->port, SCTP_SO_NOT_LOCKED, NULL, NULL);
10865 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10870 sctp_send_shutdown_complete2(struct mbuf *m, struct sctphdr *sh,
10871 uint32_t vrf_id, uint16_t port)
10873 /* formulate and SEND a SHUTDOWN-COMPLETE */
10874 struct mbuf *o_pak;
10877 struct udphdr *udp = NULL;
10878 int offset_out, len, mlen;
10879 struct sctp_shutdown_complete_msg *comp_cp;
10882 struct ip *iph_out;
10886 struct ip6_hdr *ip6, *ip6_out;
10890 iph = mtod(m, struct ip *);
10891 switch (iph->ip_v) {
10894 len = (sizeof(struct ip) + sizeof(struct sctp_shutdown_complete_msg));
10898 case IPV6_VERSION >> 4:
10899 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_shutdown_complete_msg));
10906 len += sizeof(struct udphdr);
10908 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
10909 if (mout == NULL) {
10912 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10913 SCTP_BUF_LEN(mout) = len;
10914 SCTP_BUF_NEXT(mout) = NULL;
10915 if (m->m_flags & M_FLOWID) {
10916 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
10917 mout->m_flags |= M_FLOWID;
10927 switch (iph->ip_v) {
10930 iph_out = mtod(mout, struct ip *);
10932 /* Fill in the IP header for the ABORT */
10933 iph_out->ip_v = IPVERSION;
10934 iph_out->ip_hl = (sizeof(struct ip) / 4);
10935 iph_out->ip_tos = (u_char)0;
10936 iph_out->ip_id = 0;
10937 iph_out->ip_off = 0;
10938 iph_out->ip_ttl = MAXTTL;
10940 iph_out->ip_p = IPPROTO_UDP;
10942 iph_out->ip_p = IPPROTO_SCTP;
10944 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
10945 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
10947 /* let IP layer calculate this */
10948 iph_out->ip_sum = 0;
10949 offset_out += sizeof(*iph_out);
10950 comp_cp = (struct sctp_shutdown_complete_msg *)(
10951 (caddr_t)iph_out + offset_out);
10955 case IPV6_VERSION >> 4:
10956 ip6 = (struct ip6_hdr *)iph;
10957 ip6_out = mtod(mout, struct ip6_hdr *);
10959 /* Fill in the IPv6 header for the ABORT */
10960 ip6_out->ip6_flow = ip6->ip6_flow;
10961 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
10963 ip6_out->ip6_nxt = IPPROTO_UDP;
10965 ip6_out->ip6_nxt = IPPROTO_SCTP;
10967 ip6_out->ip6_src = ip6->ip6_dst;
10968 ip6_out->ip6_dst = ip6->ip6_src;
10970 * ?? The old code had both the iph len + payload, I think
10971 * this is wrong and would never have worked
10973 ip6_out->ip6_plen = sizeof(struct sctp_shutdown_complete_msg);
10974 offset_out += sizeof(*ip6_out);
10975 comp_cp = (struct sctp_shutdown_complete_msg *)(
10976 (caddr_t)ip6_out + offset_out);
10980 /* Currently not supported. */
10981 sctp_m_freem(mout);
10985 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
10986 sctp_m_freem(mout);
10989 udp = (struct udphdr *)comp_cp;
10990 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
10991 udp->uh_dport = port;
10992 udp->uh_ulen = htons(sizeof(struct sctp_shutdown_complete_msg) + sizeof(struct udphdr));
10996 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11002 offset_out += sizeof(struct udphdr);
11003 comp_cp = (struct sctp_shutdown_complete_msg *)((caddr_t)comp_cp + sizeof(struct udphdr));
11005 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11007 sctp_m_freem(mout);
11010 /* Now copy in and fill in the ABORT tags etc. */
11011 comp_cp->sh.src_port = sh->dest_port;
11012 comp_cp->sh.dest_port = sh->src_port;
11013 comp_cp->sh.checksum = 0;
11014 comp_cp->sh.v_tag = sh->v_tag;
11015 comp_cp->shut_cmp.ch.chunk_flags = SCTP_HAD_NO_TCB;
11016 comp_cp->shut_cmp.ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
11017 comp_cp->shut_cmp.ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
11020 if (iph_out != NULL) {
11024 mlen = SCTP_BUF_LEN(mout);
11025 bzero(&ro, sizeof ro);
11026 /* set IPv4 length */
11027 iph_out->ip_len = mlen;
11028 #ifdef SCTP_PACKET_LOGGING
11029 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11030 sctp_packet_log(mout, mlen);
11033 #if defined(SCTP_WITH_NO_CSUM)
11034 SCTP_STAT_INCR(sctps_sendnocrc);
11036 comp_cp->sh.checksum = sctp_calculate_cksum(mout, offset_out);
11037 SCTP_STAT_INCR(sctps_sendswcrc);
11040 SCTP_ENABLE_UDP_CSUM(mout);
11043 #if defined(SCTP_WITH_NO_CSUM)
11044 SCTP_STAT_INCR(sctps_sendnocrc);
11046 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11047 mout->m_pkthdr.csum_data = 0;
11048 SCTP_STAT_INCR(sctps_sendhwcrc);
11051 SCTP_ATTACH_CHAIN(o_pak, mout, mlen);
11053 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
11055 /* Free the route if we got one back */
11061 if (ip6_out != NULL) {
11062 struct route_in6 ro;
11064 struct ifnet *ifp = NULL;
11066 bzero(&ro, sizeof(ro));
11067 mlen = SCTP_BUF_LEN(mout);
11068 #ifdef SCTP_PACKET_LOGGING
11069 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11070 sctp_packet_log(mout, mlen);
11072 SCTP_ATTACH_CHAIN(o_pak, mout, mlen);
11074 #if defined(SCTP_WITH_NO_CSUM)
11075 SCTP_STAT_INCR(sctps_sendnocrc);
11077 comp_cp->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11078 SCTP_STAT_INCR(sctps_sendswcrc);
11080 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), mlen - sizeof(struct ip6_hdr))) == 0) {
11081 udp->uh_sum = 0xffff;
11084 #if defined(SCTP_WITH_NO_CSUM)
11085 SCTP_STAT_INCR(sctps_sendnocrc);
11087 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11088 mout->m_pkthdr.csum_data = 0;
11089 SCTP_STAT_INCR(sctps_sendhwcrc);
11092 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
11094 /* Free the route if we got one back */
11099 SCTP_STAT_INCR(sctps_sendpackets);
11100 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11101 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11107 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11108 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11113 struct sctp_tmit_chunk *chk;
11114 struct sctp_heartbeat_chunk *hb;
11115 struct timeval now;
11117 SCTP_TCB_LOCK_ASSERT(stcb);
11121 (void)SCTP_GETTIME_TIMEVAL(&now);
11122 switch (net->ro._l_addr.sa.sa_family) {
11134 sctp_alloc_a_chunk(stcb, chk);
11136 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11139 chk->copy_by_ref = 0;
11140 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11141 chk->rec.chunk_id.can_take_data = 1;
11142 chk->asoc = &stcb->asoc;
11143 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11145 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11146 if (chk->data == NULL) {
11147 sctp_free_a_chunk(stcb, chk, so_locked);
11150 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11151 SCTP_BUF_LEN(chk->data) = chk->send_size;
11152 chk->sent = SCTP_DATAGRAM_UNSENT;
11153 chk->snd_count = 0;
11155 atomic_add_int(&chk->whoTo->ref_count, 1);
11156 /* Now we have a mbuf that we can fill in with the details */
11157 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11158 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11159 /* fill out chunk header */
11160 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11161 hb->ch.chunk_flags = 0;
11162 hb->ch.chunk_length = htons(chk->send_size);
11163 /* Fill out hb parameter */
11164 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11165 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11166 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11167 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11168 /* Did our user request this one, put it in */
11169 hb->heartbeat.hb_info.addr_family = net->ro._l_addr.sa.sa_family;
11170 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11171 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11173 * we only take from the entropy pool if the address is not
11176 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11177 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11179 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11180 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11182 switch (net->ro._l_addr.sa.sa_family) {
11185 memcpy(hb->heartbeat.hb_info.address,
11186 &net->ro._l_addr.sin.sin_addr,
11187 sizeof(net->ro._l_addr.sin.sin_addr));
11192 memcpy(hb->heartbeat.hb_info.address,
11193 &net->ro._l_addr.sin6.sin6_addr,
11194 sizeof(net->ro._l_addr.sin6.sin6_addr));
11201 net->hb_responded = 0;
11202 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11203 stcb->asoc.ctrl_queue_cnt++;
11204 SCTP_STAT_INCR(sctps_sendheartbeat);
11209 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11212 struct sctp_association *asoc;
11213 struct sctp_ecne_chunk *ecne;
11214 struct sctp_tmit_chunk *chk;
11219 asoc = &stcb->asoc;
11220 SCTP_TCB_LOCK_ASSERT(stcb);
11221 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11222 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11223 /* found a previous ECN_ECHO update it if needed */
11224 uint32_t cnt, ctsn;
11226 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11227 ctsn = ntohl(ecne->tsn);
11228 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11229 ecne->tsn = htonl(high_tsn);
11230 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11232 cnt = ntohl(ecne->num_pkts_since_cwr);
11234 ecne->num_pkts_since_cwr = htonl(cnt);
11238 /* nope could not find one to update so we must build one */
11239 sctp_alloc_a_chunk(stcb, chk);
11243 chk->copy_by_ref = 0;
11244 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11245 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11246 chk->rec.chunk_id.can_take_data = 0;
11247 chk->asoc = &stcb->asoc;
11248 chk->send_size = sizeof(struct sctp_ecne_chunk);
11249 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11250 if (chk->data == NULL) {
11251 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11254 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11255 SCTP_BUF_LEN(chk->data) = chk->send_size;
11256 chk->sent = SCTP_DATAGRAM_UNSENT;
11257 chk->snd_count = 0;
11259 atomic_add_int(&chk->whoTo->ref_count, 1);
11261 stcb->asoc.ecn_echo_cnt_onq++;
11262 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11263 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11264 ecne->ch.chunk_flags = 0;
11265 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11266 ecne->tsn = htonl(high_tsn);
11267 ecne->num_pkts_since_cwr = htonl(1);
11268 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11269 asoc->ctrl_queue_cnt++;
11273 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11274 struct mbuf *m, int iphlen, int bad_crc)
11276 struct sctp_association *asoc;
11277 struct sctp_pktdrop_chunk *drp;
11278 struct sctp_tmit_chunk *chk;
11285 struct ip6_hdr *ip6h;
11288 int fullsz = 0, extra = 0;
11291 struct sctp_chunkhdr *ch, chunk_buf;
11292 unsigned int chk_length;
11297 asoc = &stcb->asoc;
11298 SCTP_TCB_LOCK_ASSERT(stcb);
11299 if (asoc->peer_supports_pktdrop == 0) {
11301 * peer must declare support before I send one.
11305 if (stcb->sctp_socket == NULL) {
11308 sctp_alloc_a_chunk(stcb, chk);
11312 chk->copy_by_ref = 0;
11313 iph = mtod(m, struct ip *);
11315 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11318 switch (iph->ip_v) {
11322 len = chk->send_size = iph->ip_len;
11326 case IPV6_VERSION >> 4:
11328 ip6h = mtod(m, struct ip6_hdr *);
11329 len = chk->send_size = htons(ip6h->ip6_plen);
11335 /* Validate that we do not have an ABORT in here. */
11336 offset = iphlen + sizeof(struct sctphdr);
11337 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11338 sizeof(*ch), (uint8_t *) & chunk_buf);
11339 while (ch != NULL) {
11340 chk_length = ntohs(ch->chunk_length);
11341 if (chk_length < sizeof(*ch)) {
11342 /* break to abort land */
11345 switch (ch->chunk_type) {
11346 case SCTP_PACKET_DROPPED:
11347 case SCTP_ABORT_ASSOCIATION:
11348 case SCTP_INITIATION_ACK:
11350 * We don't respond with an PKT-DROP to an ABORT
11351 * or PKT-DROP. We also do not respond to an
11352 * INIT-ACK, because we can't know if the initiation
11353 * tag is correct or not.
11355 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11360 offset += SCTP_SIZE32(chk_length);
11361 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11362 sizeof(*ch), (uint8_t *) & chunk_buf);
11365 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11366 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11368 * only send 1 mtu worth, trim off the excess on the end.
11370 fullsz = len - extra;
11371 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11374 chk->asoc = &stcb->asoc;
11375 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11376 if (chk->data == NULL) {
11378 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11381 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11382 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11384 sctp_m_freem(chk->data);
11388 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11389 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11390 chk->book_size_scale = 0;
11392 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11393 drp->trunc_len = htons(fullsz);
11395 * Len is already adjusted to size minus overhead above take
11396 * out the pkt_drop chunk itself from it.
11398 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11399 len = chk->send_size;
11401 /* no truncation needed */
11402 drp->ch.chunk_flags = 0;
11403 drp->trunc_len = htons(0);
11406 drp->ch.chunk_flags |= SCTP_BADCRC;
11408 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11409 SCTP_BUF_LEN(chk->data) = chk->send_size;
11410 chk->sent = SCTP_DATAGRAM_UNSENT;
11411 chk->snd_count = 0;
11413 /* we should hit here */
11415 atomic_add_int(&chk->whoTo->ref_count, 1);
11419 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11420 chk->rec.chunk_id.can_take_data = 1;
11421 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11422 drp->ch.chunk_length = htons(chk->send_size);
11423 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11427 drp->bottle_bw = htonl(spc);
11428 if (asoc->my_rwnd) {
11429 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11430 asoc->size_on_all_streams +
11431 asoc->my_rwnd_control_len +
11432 stcb->sctp_socket->so_rcv.sb_cc);
11435 * If my rwnd is 0, possibly from mbuf depletion as well as
11436 * space used, tell the peer there is NO space aka onq == bw
11438 drp->current_onq = htonl(spc);
11442 m_copydata(m, iphlen, len, (caddr_t)datap);
11443 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11444 asoc->ctrl_queue_cnt++;
11448 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11450 struct sctp_association *asoc;
11451 struct sctp_cwr_chunk *cwr;
11452 struct sctp_tmit_chunk *chk;
11454 asoc = &stcb->asoc;
11455 SCTP_TCB_LOCK_ASSERT(stcb);
11459 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11460 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11462 * found a previous CWR queued to same destination
11463 * update it if needed
11467 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11468 ctsn = ntohl(cwr->tsn);
11469 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11470 cwr->tsn = htonl(high_tsn);
11472 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11473 /* Make sure override is carried */
11474 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11479 sctp_alloc_a_chunk(stcb, chk);
11483 chk->copy_by_ref = 0;
11484 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11485 chk->rec.chunk_id.can_take_data = 1;
11486 chk->asoc = &stcb->asoc;
11487 chk->send_size = sizeof(struct sctp_cwr_chunk);
11488 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11489 if (chk->data == NULL) {
11490 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11493 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11494 SCTP_BUF_LEN(chk->data) = chk->send_size;
11495 chk->sent = SCTP_DATAGRAM_UNSENT;
11496 chk->snd_count = 0;
11498 atomic_add_int(&chk->whoTo->ref_count, 1);
11499 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11500 cwr->ch.chunk_type = SCTP_ECN_CWR;
11501 cwr->ch.chunk_flags = override;
11502 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11503 cwr->tsn = htonl(high_tsn);
11504 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11505 asoc->ctrl_queue_cnt++;
11509 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11510 int number_entries, uint16_t * list,
11511 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11513 int len, old_len, i;
11514 struct sctp_stream_reset_out_request *req_out;
11515 struct sctp_chunkhdr *ch;
11517 ch = mtod(chk->data, struct sctp_chunkhdr *);
11520 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11522 /* get to new offset for the param. */
11523 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11524 /* now how long will this param be? */
11525 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11526 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11527 req_out->ph.param_length = htons(len);
11528 req_out->request_seq = htonl(seq);
11529 req_out->response_seq = htonl(resp_seq);
11530 req_out->send_reset_at_tsn = htonl(last_sent);
11531 if (number_entries) {
11532 for (i = 0; i < number_entries; i++) {
11533 req_out->list_of_streams[i] = htons(list[i]);
11536 if (SCTP_SIZE32(len) > len) {
11538 * Need to worry about the pad we may end up adding to the
11539 * end. This is easy since the struct is either aligned to 4
11540 * bytes or 2 bytes off.
11542 req_out->list_of_streams[number_entries] = 0;
11544 /* now fix the chunk length */
11545 ch->chunk_length = htons(len + old_len);
11546 chk->book_size = len + old_len;
11547 chk->book_size_scale = 0;
11548 chk->send_size = SCTP_SIZE32(chk->book_size);
11549 SCTP_BUF_LEN(chk->data) = chk->send_size;
11555 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11556 int number_entries, uint16_t * list,
11559 int len, old_len, i;
11560 struct sctp_stream_reset_in_request *req_in;
11561 struct sctp_chunkhdr *ch;
11563 ch = mtod(chk->data, struct sctp_chunkhdr *);
11566 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11568 /* get to new offset for the param. */
11569 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11570 /* now how long will this param be? */
11571 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11572 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11573 req_in->ph.param_length = htons(len);
11574 req_in->request_seq = htonl(seq);
11575 if (number_entries) {
11576 for (i = 0; i < number_entries; i++) {
11577 req_in->list_of_streams[i] = htons(list[i]);
11580 if (SCTP_SIZE32(len) > len) {
11582 * Need to worry about the pad we may end up adding to the
11583 * end. This is easy since the struct is either aligned to 4
11584 * bytes or 2 bytes off.
11586 req_in->list_of_streams[number_entries] = 0;
11588 /* now fix the chunk length */
11589 ch->chunk_length = htons(len + old_len);
11590 chk->book_size = len + old_len;
11591 chk->book_size_scale = 0;
11592 chk->send_size = SCTP_SIZE32(chk->book_size);
11593 SCTP_BUF_LEN(chk->data) = chk->send_size;
11599 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11603 struct sctp_stream_reset_tsn_request *req_tsn;
11604 struct sctp_chunkhdr *ch;
11606 ch = mtod(chk->data, struct sctp_chunkhdr *);
11609 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11611 /* get to new offset for the param. */
11612 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11613 /* now how long will this param be? */
11614 len = sizeof(struct sctp_stream_reset_tsn_request);
11615 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11616 req_tsn->ph.param_length = htons(len);
11617 req_tsn->request_seq = htonl(seq);
11619 /* now fix the chunk length */
11620 ch->chunk_length = htons(len + old_len);
11621 chk->send_size = len + old_len;
11622 chk->book_size = SCTP_SIZE32(chk->send_size);
11623 chk->book_size_scale = 0;
11624 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11629 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11630 uint32_t resp_seq, uint32_t result)
11633 struct sctp_stream_reset_response *resp;
11634 struct sctp_chunkhdr *ch;
11636 ch = mtod(chk->data, struct sctp_chunkhdr *);
11639 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11641 /* get to new offset for the param. */
11642 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11643 /* now how long will this param be? */
11644 len = sizeof(struct sctp_stream_reset_response);
11645 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11646 resp->ph.param_length = htons(len);
11647 resp->response_seq = htonl(resp_seq);
11648 resp->result = ntohl(result);
11650 /* now fix the chunk length */
11651 ch->chunk_length = htons(len + old_len);
11652 chk->book_size = len + old_len;
11653 chk->book_size_scale = 0;
11654 chk->send_size = SCTP_SIZE32(chk->book_size);
11655 SCTP_BUF_LEN(chk->data) = chk->send_size;
11662 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11663 uint32_t resp_seq, uint32_t result,
11664 uint32_t send_una, uint32_t recv_next)
11667 struct sctp_stream_reset_response_tsn *resp;
11668 struct sctp_chunkhdr *ch;
11670 ch = mtod(chk->data, struct sctp_chunkhdr *);
11673 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11675 /* get to new offset for the param. */
11676 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11677 /* now how long will this param be? */
11678 len = sizeof(struct sctp_stream_reset_response_tsn);
11679 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11680 resp->ph.param_length = htons(len);
11681 resp->response_seq = htonl(resp_seq);
11682 resp->result = htonl(result);
11683 resp->senders_next_tsn = htonl(send_una);
11684 resp->receivers_next_tsn = htonl(recv_next);
11686 /* now fix the chunk length */
11687 ch->chunk_length = htons(len + old_len);
11688 chk->book_size = len + old_len;
11689 chk->send_size = SCTP_SIZE32(chk->book_size);
11690 chk->book_size_scale = 0;
11691 SCTP_BUF_LEN(chk->data) = chk->send_size;
11696 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11701 struct sctp_chunkhdr *ch;
11702 struct sctp_stream_reset_add_strm *addstr;
11704 ch = mtod(chk->data, struct sctp_chunkhdr *);
11705 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11707 /* get to new offset for the param. */
11708 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11709 /* now how long will this param be? */
11710 len = sizeof(struct sctp_stream_reset_add_strm);
11713 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11714 addstr->ph.param_length = htons(len);
11715 addstr->request_seq = htonl(seq);
11716 addstr->number_of_streams = htons(adding);
11717 addstr->reserved = 0;
11719 /* now fix the chunk length */
11720 ch->chunk_length = htons(len + old_len);
11721 chk->send_size = len + old_len;
11722 chk->book_size = SCTP_SIZE32(chk->send_size);
11723 chk->book_size_scale = 0;
11724 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11729 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11734 struct sctp_chunkhdr *ch;
11735 struct sctp_stream_reset_add_strm *addstr;
11737 ch = mtod(chk->data, struct sctp_chunkhdr *);
11738 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11740 /* get to new offset for the param. */
11741 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11742 /* now how long will this param be? */
11743 len = sizeof(struct sctp_stream_reset_add_strm);
11745 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11746 addstr->ph.param_length = htons(len);
11747 addstr->request_seq = htonl(seq);
11748 addstr->number_of_streams = htons(adding);
11749 addstr->reserved = 0;
11751 /* now fix the chunk length */
11752 ch->chunk_length = htons(len + old_len);
11753 chk->send_size = len + old_len;
11754 chk->book_size = SCTP_SIZE32(chk->send_size);
11755 chk->book_size_scale = 0;
11756 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11763 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11764 int number_entries, uint16_t * list,
11765 uint8_t send_out_req,
11766 uint8_t send_in_req,
11767 uint8_t send_tsn_req,
11768 uint8_t add_stream,
11770 uint16_t adding_i, uint8_t peer_asked
11774 struct sctp_association *asoc;
11775 struct sctp_tmit_chunk *chk;
11776 struct sctp_chunkhdr *ch;
11779 asoc = &stcb->asoc;
11780 if (asoc->stream_reset_outstanding) {
11782 * Already one pending, must get ACK back to clear the flag.
11784 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11787 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11788 (add_stream == 0)) {
11789 /* nothing to do */
11790 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11793 if (send_tsn_req && (send_out_req || send_in_req)) {
11794 /* error, can't do that */
11795 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11798 sctp_alloc_a_chunk(stcb, chk);
11800 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11803 chk->copy_by_ref = 0;
11804 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11805 chk->rec.chunk_id.can_take_data = 0;
11806 chk->asoc = &stcb->asoc;
11807 chk->book_size = sizeof(struct sctp_chunkhdr);
11808 chk->send_size = SCTP_SIZE32(chk->book_size);
11809 chk->book_size_scale = 0;
11811 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11812 if (chk->data == NULL) {
11813 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11814 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11817 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11819 /* setup chunk parameters */
11820 chk->sent = SCTP_DATAGRAM_UNSENT;
11821 chk->snd_count = 0;
11822 if (stcb->asoc.alternate) {
11823 chk->whoTo = stcb->asoc.alternate;
11825 chk->whoTo = stcb->asoc.primary_destination;
11827 atomic_add_int(&chk->whoTo->ref_count, 1);
11828 ch = mtod(chk->data, struct sctp_chunkhdr *);
11829 ch->chunk_type = SCTP_STREAM_RESET;
11830 ch->chunk_flags = 0;
11831 ch->chunk_length = htons(chk->book_size);
11832 SCTP_BUF_LEN(chk->data) = chk->send_size;
11834 seq = stcb->asoc.str_reset_seq_out;
11835 if (send_out_req) {
11836 sctp_add_stream_reset_out(chk, number_entries, list,
11837 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
11838 asoc->stream_reset_out_is_outstanding = 1;
11840 asoc->stream_reset_outstanding++;
11842 if ((add_stream & 1) &&
11843 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
11844 /* Need to allocate more */
11845 struct sctp_stream_out *oldstream;
11846 struct sctp_stream_queue_pending *sp, *nsp;
11849 oldstream = stcb->asoc.strmout;
11850 /* get some more */
11851 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
11852 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)),
11854 if (stcb->asoc.strmout == NULL) {
11857 stcb->asoc.strmout = oldstream;
11858 /* Turn off the bit */
11859 x = add_stream & 0xfe;
11864 * Ok now we proceed with copying the old out stuff and
11865 * initializing the new stuff.
11867 SCTP_TCB_SEND_LOCK(stcb);
11868 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
11869 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11870 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11871 stcb->asoc.strmout[i].next_sequence_sent = oldstream[i].next_sequence_sent;
11872 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
11873 stcb->asoc.strmout[i].stream_no = i;
11874 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
11875 /* now anything on those queues? */
11876 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
11877 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
11878 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
11880 /* Now move assoc pointers too */
11881 if (stcb->asoc.last_out_stream == &oldstream[i]) {
11882 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
11884 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
11885 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
11888 /* now the new streams */
11889 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
11890 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
11891 stcb->asoc.strmout[i].next_sequence_sent = 0x0;
11892 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11893 stcb->asoc.strmout[i].stream_no = i;
11894 stcb->asoc.strmout[i].last_msg_incomplete = 0;
11895 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
11897 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
11898 SCTP_FREE(oldstream, SCTP_M_STRMO);
11899 SCTP_TCB_SEND_UNLOCK(stcb);
11902 if ((add_stream & 1) && (adding_o > 0)) {
11903 asoc->strm_pending_add_size = adding_o;
11904 asoc->peer_req_out = peer_asked;
11905 sctp_add_an_out_stream(chk, seq, adding_o);
11907 asoc->stream_reset_outstanding++;
11909 if ((add_stream & 2) && (adding_i > 0)) {
11910 sctp_add_an_in_stream(chk, seq, adding_i);
11912 asoc->stream_reset_outstanding++;
11915 sctp_add_stream_reset_in(chk, number_entries, list, seq);
11917 asoc->stream_reset_outstanding++;
11919 if (send_tsn_req) {
11920 sctp_add_stream_reset_tsn(chk, seq);
11921 asoc->stream_reset_outstanding++;
11923 asoc->str_reset = chk;
11924 /* insert the chunk for sending */
11925 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11928 asoc->ctrl_queue_cnt++;
11929 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11934 sctp_send_abort(struct mbuf *m, int iphlen, struct sctphdr *sh, uint32_t vtag,
11935 struct mbuf *err_cause, uint32_t vrf_id, uint16_t port)
11938 * Formulate the abort message, and send it back down.
11940 struct mbuf *o_pak;
11942 struct sctp_abort_msg *abm;
11944 struct udphdr *udp;
11945 int iphlen_out, len;
11948 struct ip *iph_out;
11952 struct ip6_hdr *ip6, *ip6_out;
11956 /* don't respond to ABORT with ABORT */
11957 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
11959 sctp_m_freem(err_cause);
11962 iph = mtod(m, struct ip *);
11963 switch (iph->ip_v) {
11966 len = (sizeof(struct ip) + sizeof(struct sctp_abort_msg));
11970 case IPV6_VERSION >> 4:
11971 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_abort_msg));
11976 sctp_m_freem(err_cause);
11981 len += sizeof(struct udphdr);
11983 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
11984 if (mout == NULL) {
11986 sctp_m_freem(err_cause);
11990 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11991 SCTP_BUF_LEN(mout) = len;
11992 SCTP_BUF_NEXT(mout) = err_cause;
11993 if (m->m_flags & M_FLOWID) {
11994 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
11995 mout->m_flags |= M_FLOWID;
12003 switch (iph->ip_v) {
12006 iph_out = mtod(mout, struct ip *);
12008 /* Fill in the IP header for the ABORT */
12009 iph_out->ip_v = IPVERSION;
12010 iph_out->ip_hl = (sizeof(struct ip) / 4);
12011 iph_out->ip_tos = (u_char)0;
12012 iph_out->ip_id = 0;
12013 iph_out->ip_off = 0;
12014 iph_out->ip_ttl = MAXTTL;
12016 iph_out->ip_p = IPPROTO_UDP;
12018 iph_out->ip_p = IPPROTO_SCTP;
12020 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
12021 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
12022 /* let IP layer calculate this */
12023 iph_out->ip_sum = 0;
12025 iphlen_out = sizeof(*iph_out);
12026 abm = (struct sctp_abort_msg *)((caddr_t)iph_out + iphlen_out);
12030 case IPV6_VERSION >> 4:
12031 ip6 = (struct ip6_hdr *)iph;
12032 ip6_out = mtod(mout, struct ip6_hdr *);
12034 /* Fill in the IP6 header for the ABORT */
12035 ip6_out->ip6_flow = ip6->ip6_flow;
12036 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
12038 ip6_out->ip6_nxt = IPPROTO_UDP;
12040 ip6_out->ip6_nxt = IPPROTO_SCTP;
12042 ip6_out->ip6_src = ip6->ip6_dst;
12043 ip6_out->ip6_dst = ip6->ip6_src;
12045 iphlen_out = sizeof(*ip6_out);
12046 abm = (struct sctp_abort_msg *)((caddr_t)ip6_out + iphlen_out);
12050 /* Currently not supported */
12051 sctp_m_freem(mout);
12055 udp = (struct udphdr *)abm;
12057 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
12058 sctp_m_freem(mout);
12061 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
12062 udp->uh_dport = port;
12063 /* set udp->uh_ulen later */
12065 iphlen_out += sizeof(struct udphdr);
12066 abm = (struct sctp_abort_msg *)((caddr_t)abm + sizeof(struct udphdr));
12068 abm->sh.src_port = sh->dest_port;
12069 abm->sh.dest_port = sh->src_port;
12070 abm->sh.checksum = 0;
12072 abm->sh.v_tag = sh->v_tag;
12073 abm->msg.ch.chunk_flags = SCTP_HAD_NO_TCB;
12075 abm->sh.v_tag = htonl(vtag);
12076 abm->msg.ch.chunk_flags = 0;
12078 abm->msg.ch.chunk_type = SCTP_ABORT_ASSOCIATION;
12081 struct mbuf *m_tmp = err_cause;
12084 /* get length of the err_cause chain */
12085 while (m_tmp != NULL) {
12086 err_len += SCTP_BUF_LEN(m_tmp);
12087 m_tmp = SCTP_BUF_NEXT(m_tmp);
12089 len = SCTP_BUF_LEN(mout) + err_len;
12091 /* need pad at end of chunk */
12092 uint32_t cpthis = 0;
12095 padlen = 4 - (len % 4);
12096 m_copyback(mout, len, padlen, (caddr_t)&cpthis);
12099 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch) + err_len);
12101 len = SCTP_BUF_LEN(mout);
12102 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch));
12105 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
12107 sctp_m_freem(mout);
12111 if (iph_out != NULL) {
12115 /* zap the stack pointer to the route */
12116 bzero(&ro, sizeof ro);
12118 udp->uh_ulen = htons(len - sizeof(struct ip));
12120 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
12125 SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip_output:\n");
12126 SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, iph_out, &abm->sh);
12127 /* set IPv4 length */
12128 iph_out->ip_len = len;
12130 #ifdef SCTP_PACKET_LOGGING
12131 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12132 sctp_packet_log(mout, len);
12134 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12136 #if defined(SCTP_WITH_NO_CSUM)
12137 SCTP_STAT_INCR(sctps_sendnocrc);
12139 abm->sh.checksum = sctp_calculate_cksum(mout, iphlen_out);
12140 SCTP_STAT_INCR(sctps_sendswcrc);
12143 SCTP_ENABLE_UDP_CSUM(o_pak);
12146 #if defined(SCTP_WITH_NO_CSUM)
12147 SCTP_STAT_INCR(sctps_sendnocrc);
12149 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12150 mout->m_pkthdr.csum_data = 0;
12151 SCTP_STAT_INCR(sctps_sendhwcrc);
12154 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
12156 /* Free the route if we got one back */
12162 if (ip6_out != NULL) {
12163 struct route_in6 ro;
12165 struct ifnet *ifp = NULL;
12167 /* zap the stack pointer to the route */
12168 bzero(&ro, sizeof(ro));
12170 udp->uh_ulen = htons(len - sizeof(struct ip6_hdr));
12172 SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip6_output:\n");
12173 SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, (struct ip *)ip6_out, &abm->sh);
12174 ip6_out->ip6_plen = len - sizeof(*ip6_out);
12175 #ifdef SCTP_PACKET_LOGGING
12176 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12177 sctp_packet_log(mout, len);
12179 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12181 #if defined(SCTP_WITH_NO_CSUM)
12182 SCTP_STAT_INCR(sctps_sendnocrc);
12184 abm->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
12185 SCTP_STAT_INCR(sctps_sendswcrc);
12187 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
12188 udp->uh_sum = 0xffff;
12191 #if defined(SCTP_WITH_NO_CSUM)
12192 SCTP_STAT_INCR(sctps_sendnocrc);
12194 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12195 mout->m_pkthdr.csum_data = 0;
12196 SCTP_STAT_INCR(sctps_sendhwcrc);
12199 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
12201 /* Free the route if we got one back */
12206 SCTP_STAT_INCR(sctps_sendpackets);
12207 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
12208 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
12212 sctp_send_operr_to(struct mbuf *m, int iphlen, struct mbuf *scm, uint32_t vtag,
12213 uint32_t vrf_id, uint16_t port)
12215 struct mbuf *o_pak;
12216 struct sctphdr *sh, *sh_out;
12217 struct sctp_chunkhdr *ch;
12219 struct udphdr *udp = NULL;
12221 int iphlen_out, len;
12224 struct ip *iph_out;
12228 struct ip6_hdr *ip6, *ip6_out;
12232 iph = mtod(m, struct ip *);
12233 sh = (struct sctphdr *)((caddr_t)iph + iphlen);
12234 switch (iph->ip_v) {
12237 len = (sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr));
12241 case IPV6_VERSION >> 4:
12242 len = (sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr));
12252 len += sizeof(struct udphdr);
12254 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
12255 if (mout == NULL) {
12261 SCTP_BUF_RESV_UF(mout, max_linkhdr);
12262 SCTP_BUF_LEN(mout) = len;
12263 SCTP_BUF_NEXT(mout) = scm;
12264 if (m->m_flags & M_FLOWID) {
12265 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
12266 mout->m_flags |= M_FLOWID;
12274 switch (iph->ip_v) {
12277 iph_out = mtod(mout, struct ip *);
12279 /* Fill in the IP header for the ABORT */
12280 iph_out->ip_v = IPVERSION;
12281 iph_out->ip_hl = (sizeof(struct ip) / 4);
12282 iph_out->ip_tos = (u_char)0;
12283 iph_out->ip_id = 0;
12284 iph_out->ip_off = 0;
12285 iph_out->ip_ttl = MAXTTL;
12287 iph_out->ip_p = IPPROTO_UDP;
12289 iph_out->ip_p = IPPROTO_SCTP;
12291 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
12292 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
12293 /* let IP layer calculate this */
12294 iph_out->ip_sum = 0;
12296 iphlen_out = sizeof(struct ip);
12297 sh_out = (struct sctphdr *)((caddr_t)iph_out + iphlen_out);
12301 case IPV6_VERSION >> 4:
12302 ip6 = (struct ip6_hdr *)iph;
12303 ip6_out = mtod(mout, struct ip6_hdr *);
12305 /* Fill in the IP6 header for the ABORT */
12306 ip6_out->ip6_flow = ip6->ip6_flow;
12307 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
12309 ip6_out->ip6_nxt = IPPROTO_UDP;
12311 ip6_out->ip6_nxt = IPPROTO_SCTP;
12313 ip6_out->ip6_src = ip6->ip6_dst;
12314 ip6_out->ip6_dst = ip6->ip6_src;
12316 iphlen_out = sizeof(struct ip6_hdr);
12317 sh_out = (struct sctphdr *)((caddr_t)ip6_out + iphlen_out);
12321 /* Currently not supported */
12322 sctp_m_freem(mout);
12326 udp = (struct udphdr *)sh_out;
12328 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
12329 sctp_m_freem(mout);
12332 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
12333 udp->uh_dport = port;
12334 /* set udp->uh_ulen later */
12336 iphlen_out += sizeof(struct udphdr);
12337 sh_out = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
12339 sh_out->src_port = sh->dest_port;
12340 sh_out->dest_port = sh->src_port;
12341 sh_out->v_tag = vtag;
12342 sh_out->checksum = 0;
12344 ch = (struct sctp_chunkhdr *)((caddr_t)sh_out + sizeof(struct sctphdr));
12345 ch->chunk_type = SCTP_OPERATION_ERROR;
12346 ch->chunk_flags = 0;
12349 struct mbuf *m_tmp = scm;
12352 /* get length of the err_cause chain */
12353 while (m_tmp != NULL) {
12354 cause_len += SCTP_BUF_LEN(m_tmp);
12355 m_tmp = SCTP_BUF_NEXT(m_tmp);
12357 len = SCTP_BUF_LEN(mout) + cause_len;
12358 if (cause_len % 4) {
12359 /* need pad at end of chunk */
12360 uint32_t cpthis = 0;
12363 padlen = 4 - (len % 4);
12364 m_copyback(mout, len, padlen, (caddr_t)&cpthis);
12367 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
12369 len = SCTP_BUF_LEN(mout);
12370 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr));
12373 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
12375 sctp_m_freem(mout);
12379 if (iph_out != NULL) {
12383 /* zap the stack pointer to the route */
12384 bzero(&ro, sizeof ro);
12386 udp->uh_ulen = htons(len - sizeof(struct ip));
12388 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
12393 /* set IPv4 length */
12394 iph_out->ip_len = len;
12396 #ifdef SCTP_PACKET_LOGGING
12397 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12398 sctp_packet_log(mout, len);
12400 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12402 #if defined(SCTP_WITH_NO_CSUM)
12403 SCTP_STAT_INCR(sctps_sendnocrc);
12405 sh_out->checksum = sctp_calculate_cksum(mout, iphlen_out);
12406 SCTP_STAT_INCR(sctps_sendswcrc);
12409 SCTP_ENABLE_UDP_CSUM(o_pak);
12412 #if defined(SCTP_WITH_NO_CSUM)
12413 SCTP_STAT_INCR(sctps_sendnocrc);
12415 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12416 mout->m_pkthdr.csum_data = 0;
12417 SCTP_STAT_INCR(sctps_sendhwcrc);
12420 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
12422 /* Free the route if we got one back */
12428 if (ip6_out != NULL) {
12429 struct route_in6 ro;
12431 struct ifnet *ifp = NULL;
12433 /* zap the stack pointer to the route */
12434 bzero(&ro, sizeof(ro));
12436 udp->uh_ulen = htons(len - sizeof(struct ip6_hdr));
12438 ip6_out->ip6_plen = len - sizeof(*ip6_out);
12439 #ifdef SCTP_PACKET_LOGGING
12440 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12441 sctp_packet_log(mout, len);
12443 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12445 #if defined(SCTP_WITH_NO_CSUM)
12446 SCTP_STAT_INCR(sctps_sendnocrc);
12448 sh_out->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
12449 SCTP_STAT_INCR(sctps_sendswcrc);
12451 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
12452 udp->uh_sum = 0xffff;
12455 #if defined(SCTP_WITH_NO_CSUM)
12456 SCTP_STAT_INCR(sctps_sendnocrc);
12458 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12459 mout->m_pkthdr.csum_data = 0;
12460 SCTP_STAT_INCR(sctps_sendhwcrc);
12463 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
12465 /* Free the route if we got one back */
12470 SCTP_STAT_INCR(sctps_sendpackets);
12471 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
12472 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
12475 static struct mbuf *
12476 sctp_copy_resume(struct uio *uio,
12478 int user_marks_eor,
12481 struct mbuf **new_tail)
12485 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12486 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12488 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12491 *sndout = m_length(m, NULL);
12492 *new_tail = m_last(m);
12498 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12505 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12507 if (sp->data == NULL) {
12508 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12511 sp->tail_mbuf = m_last(sp->data);
12517 static struct sctp_stream_queue_pending *
12518 sctp_copy_it_in(struct sctp_tcb *stcb,
12519 struct sctp_association *asoc,
12520 struct sctp_sndrcvinfo *srcv,
12522 struct sctp_nets *net,
12524 int user_marks_eor,
12528 * This routine must be very careful in its work. Protocol
12529 * processing is up and running so care must be taken to spl...()
12530 * when you need to do something that may effect the stcb/asoc. The
12531 * sb is locked however. When data is copied the protocol processing
12532 * should be enabled since this is a slower operation...
12534 struct sctp_stream_queue_pending *sp = NULL;
12538 /* Now can we send this? */
12539 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12540 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12541 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12542 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12543 /* got data while shutting down */
12544 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12545 *error = ECONNRESET;
12548 sctp_alloc_a_strmoq(stcb, sp);
12550 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12555 sp->sender_all_done = 0;
12556 sp->sinfo_flags = srcv->sinfo_flags;
12557 sp->timetolive = srcv->sinfo_timetolive;
12558 sp->ppid = srcv->sinfo_ppid;
12559 sp->context = srcv->sinfo_context;
12561 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12563 sp->stream = srcv->sinfo_stream;
12564 sp->length = min(uio->uio_resid, max_send_len);
12565 if ((sp->length == (uint32_t) uio->uio_resid) &&
12566 ((user_marks_eor == 0) ||
12567 (srcv->sinfo_flags & SCTP_EOF) ||
12568 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12569 sp->msg_is_complete = 1;
12571 sp->msg_is_complete = 0;
12573 sp->sender_all_done = 0;
12574 sp->some_taken = 0;
12575 sp->put_last_out = 0;
12576 resv_in_first = sizeof(struct sctp_data_chunk);
12577 sp->data = sp->tail_mbuf = NULL;
12578 if (sp->length == 0) {
12582 if (srcv->sinfo_keynumber_valid) {
12583 sp->auth_keyid = srcv->sinfo_keynumber;
12585 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12587 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12588 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12589 sp->holds_key_ref = 1;
12591 *error = sctp_copy_one(sp, uio, resv_in_first);
12594 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12597 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12599 atomic_add_int(&sp->net->ref_count, 1);
12603 sctp_set_prsctp_policy(sp);
12611 sctp_sosend(struct socket *so,
12612 struct sockaddr *addr,
12615 struct mbuf *control,
12620 int error, use_sndinfo = 0;
12621 struct sctp_sndrcvinfo sndrcvninfo;
12622 struct sockaddr *addr_to_use;
12624 #if defined(INET) && defined(INET6)
12625 struct sockaddr_in sin;
12630 /* process cmsg snd/rcv info (maybe a assoc-id) */
12631 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12632 sizeof(sndrcvninfo))) {
12637 addr_to_use = addr;
12638 #if defined(INET) && defined(INET6)
12639 if ((addr) && (addr->sa_family == AF_INET6)) {
12640 struct sockaddr_in6 *sin6;
12642 sin6 = (struct sockaddr_in6 *)addr;
12643 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12644 in6_sin6_2_sin(&sin, sin6);
12645 addr_to_use = (struct sockaddr *)&sin;
12649 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12652 use_sndinfo ? &sndrcvninfo : NULL
12660 sctp_lower_sosend(struct socket *so,
12661 struct sockaddr *addr,
12663 struct mbuf *i_pak,
12664 struct mbuf *control,
12666 struct sctp_sndrcvinfo *srcv
12671 unsigned int sndlen = 0, max_len;
12673 struct mbuf *top = NULL;
12674 int queue_only = 0, queue_only_for_init = 0;
12675 int free_cnt_applied = 0;
12677 int now_filled = 0;
12678 unsigned int inqueue_bytes = 0;
12679 struct sctp_block_entry be;
12680 struct sctp_inpcb *inp;
12681 struct sctp_tcb *stcb = NULL;
12682 struct timeval now;
12683 struct sctp_nets *net;
12684 struct sctp_association *asoc;
12685 struct sctp_inpcb *t_inp;
12686 int user_marks_eor;
12687 int create_lock_applied = 0;
12688 int nagle_applies = 0;
12689 int some_on_control = 0;
12690 int got_all_of_the_send = 0;
12691 int hold_tcblock = 0;
12692 int non_blocking = 0;
12693 uint32_t local_add_more, local_soresv = 0;
12695 uint16_t sinfo_flags;
12696 sctp_assoc_t sinfo_assoc_id;
12703 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12705 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12708 SCTP_RELEASE_PKT(i_pak);
12712 if ((uio == NULL) && (i_pak == NULL)) {
12713 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12716 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12717 atomic_add_int(&inp->total_sends, 1);
12719 if (uio->uio_resid < 0) {
12720 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12723 sndlen = uio->uio_resid;
12725 top = SCTP_HEADER_TO_CHAIN(i_pak);
12726 sndlen = SCTP_HEADER_LEN(i_pak);
12728 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12731 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12732 (inp->sctp_socket->so_qlimit)) {
12733 /* The listener can NOT send */
12734 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12739 * Pre-screen address, if one is given the sin-len
12740 * must be set correctly!
12743 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12745 switch (raddr->sa.sa_family) {
12748 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12749 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12753 port = raddr->sin.sin_port;
12758 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12759 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12763 port = raddr->sin6.sin6_port;
12767 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12768 error = EAFNOSUPPORT;
12775 sinfo_flags = srcv->sinfo_flags;
12776 sinfo_assoc_id = srcv->sinfo_assoc_id;
12777 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12778 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12779 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12783 if (srcv->sinfo_flags)
12784 SCTP_STAT_INCR(sctps_sends_with_flags);
12786 sinfo_flags = inp->def_send.sinfo_flags;
12787 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12789 if (sinfo_flags & SCTP_SENDALL) {
12790 /* its a sendall */
12791 error = sctp_sendall(inp, uio, top, srcv);
12795 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12796 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12800 /* now we must find the assoc */
12801 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12802 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12803 SCTP_INP_RLOCK(inp);
12804 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12806 SCTP_TCB_LOCK(stcb);
12809 SCTP_INP_RUNLOCK(inp);
12810 } else if (sinfo_assoc_id) {
12811 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12814 * Since we did not use findep we must
12815 * increment it, and if we don't find a tcb
12818 SCTP_INP_WLOCK(inp);
12819 SCTP_INP_INCR_REF(inp);
12820 SCTP_INP_WUNLOCK(inp);
12821 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12822 if (stcb == NULL) {
12823 SCTP_INP_WLOCK(inp);
12824 SCTP_INP_DECR_REF(inp);
12825 SCTP_INP_WUNLOCK(inp);
12830 if ((stcb == NULL) && (addr)) {
12831 /* Possible implicit send? */
12832 SCTP_ASOC_CREATE_LOCK(inp);
12833 create_lock_applied = 1;
12834 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12835 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12836 /* Should I really unlock ? */
12837 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12842 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12843 (addr->sa_family == AF_INET6)) {
12844 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12848 SCTP_INP_WLOCK(inp);
12849 SCTP_INP_INCR_REF(inp);
12850 SCTP_INP_WUNLOCK(inp);
12851 /* With the lock applied look again */
12852 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12853 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12854 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12856 if (stcb == NULL) {
12857 SCTP_INP_WLOCK(inp);
12858 SCTP_INP_DECR_REF(inp);
12859 SCTP_INP_WUNLOCK(inp);
12866 if (t_inp != inp) {
12867 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12872 if (stcb == NULL) {
12873 if (addr == NULL) {
12874 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12878 /* We must go ahead and start the INIT process */
12881 if ((sinfo_flags & SCTP_ABORT) ||
12882 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12884 * User asks to abort a non-existant assoc,
12885 * or EOF a non-existant assoc with no data
12887 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12891 /* get an asoc/stcb struct */
12892 vrf_id = inp->def_vrf_id;
12894 if (create_lock_applied == 0) {
12895 panic("Error, should hold create lock and I don't?");
12898 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12901 if (stcb == NULL) {
12902 /* Error is setup for us in the call */
12905 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12906 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12908 * Set the connected flag so we can queue
12911 soisconnecting(so);
12914 if (create_lock_applied) {
12915 SCTP_ASOC_CREATE_UNLOCK(inp);
12916 create_lock_applied = 0;
12918 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12921 * Turn on queue only flag to prevent data from
12925 asoc = &stcb->asoc;
12926 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12927 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12929 /* initialize authentication params for the assoc */
12930 sctp_initialize_auth_params(inp, stcb);
12933 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12934 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7);
12940 /* out with the INIT */
12941 queue_only_for_init = 1;
12943 * we may want to dig in after this call and adjust the MTU
12944 * value. It defaulted to 1500 (constant) but the ro
12945 * structure may now have an update and thus we may need to
12946 * change it BEFORE we append the message.
12950 asoc = &stcb->asoc;
12952 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12953 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12955 net = sctp_findnet(stcb, addr);
12958 if ((net == NULL) ||
12959 ((port != 0) && (port != stcb->rport))) {
12960 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12965 if (stcb->asoc.alternate) {
12966 net = stcb->asoc.alternate;
12968 net = stcb->asoc.primary_destination;
12971 atomic_add_int(&stcb->total_sends, 1);
12972 /* Keep the stcb from being freed under our feet */
12973 atomic_add_int(&asoc->refcnt, 1);
12974 free_cnt_applied = 1;
12976 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12977 if (sndlen > asoc->smallest_mtu) {
12978 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12983 if (SCTP_SO_IS_NBIO(so)
12984 || (flags & MSG_NBIO)
12988 /* would we block? */
12989 if (non_blocking) {
12990 if (hold_tcblock == 0) {
12991 SCTP_TCB_LOCK(stcb);
12994 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12995 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12996 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12997 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12998 if (sndlen > SCTP_SB_LIMIT_SND(so))
13001 error = EWOULDBLOCK;
13004 stcb->asoc.sb_send_resv += sndlen;
13005 SCTP_TCB_UNLOCK(stcb);
13008 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
13010 local_soresv = sndlen;
13011 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13012 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13013 error = ECONNRESET;
13016 if (create_lock_applied) {
13017 SCTP_ASOC_CREATE_UNLOCK(inp);
13018 create_lock_applied = 0;
13020 if (asoc->stream_reset_outstanding) {
13022 * Can't queue any data while stream reset is underway.
13024 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
13028 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
13029 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
13032 /* we are now done with all control */
13034 sctp_m_freem(control);
13037 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
13038 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
13039 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
13040 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
13041 if (srcv->sinfo_flags & SCTP_ABORT) {
13044 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13045 error = ECONNRESET;
13049 /* Ok, we will attempt a msgsnd :> */
13051 p->td_ru.ru_msgsnd++;
13053 /* Are we aborting? */
13054 if (srcv->sinfo_flags & SCTP_ABORT) {
13056 int tot_demand, tot_out = 0, max_out;
13058 SCTP_STAT_INCR(sctps_sends_with_abort);
13059 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
13060 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
13061 /* It has to be up before we abort */
13062 /* how big is the user initiated abort? */
13063 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13067 if (hold_tcblock) {
13068 SCTP_TCB_UNLOCK(stcb);
13072 struct mbuf *cntm = NULL;
13074 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAIT, 1, MT_DATA);
13076 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
13077 tot_out += SCTP_BUF_LEN(cntm);
13081 /* Must fit in a MTU */
13083 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
13084 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
13086 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13090 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAIT, 1, MT_DATA);
13093 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
13097 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
13098 max_out -= sizeof(struct sctp_abort_msg);
13099 if (tot_out > max_out) {
13103 struct sctp_paramhdr *ph;
13105 /* now move forward the data pointer */
13106 ph = mtod(mm, struct sctp_paramhdr *);
13107 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
13108 ph->param_length = htons((sizeof(struct sctp_paramhdr) + tot_out));
13110 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
13112 error = uiomove((caddr_t)ph, (int)tot_out, uio);
13115 * Here if we can't get his data we
13116 * still abort we just don't get to
13117 * send the users note :-0
13124 SCTP_BUF_NEXT(mm) = top;
13128 if (hold_tcblock == 0) {
13129 SCTP_TCB_LOCK(stcb);
13131 atomic_add_int(&stcb->asoc.refcnt, -1);
13132 free_cnt_applied = 0;
13133 /* release this lock, otherwise we hang on ourselves */
13134 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
13135 /* now relock the stcb so everything is sane */
13139 * In this case top is already chained to mm avoid double
13140 * free, since we free it below if top != NULL and driver
13141 * would free it after sending the packet out
13148 /* Calculate the maximum we can send */
13149 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13150 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13151 if (non_blocking) {
13152 /* we already checked for non-blocking above. */
13155 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13160 if (hold_tcblock) {
13161 SCTP_TCB_UNLOCK(stcb);
13164 /* Is the stream no. valid? */
13165 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
13166 /* Invalid stream number */
13167 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13171 if (asoc->strmout == NULL) {
13172 /* huh? software error */
13173 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13177 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13178 if ((user_marks_eor == 0) &&
13179 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13180 /* It will NEVER fit */
13181 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13185 if ((uio == NULL) && user_marks_eor) {
13187 * We do not support eeor mode for
13188 * sending with mbuf chains (like sendfile).
13190 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13194 if (user_marks_eor) {
13195 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13198 * For non-eeor the whole message must fit in
13199 * the socket send buffer.
13201 local_add_more = sndlen;
13204 if (non_blocking) {
13205 goto skip_preblock;
13207 if (((max_len <= local_add_more) &&
13208 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13210 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13211 /* No room right now ! */
13212 SOCKBUF_LOCK(&so->so_snd);
13213 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13214 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13215 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13216 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
13217 (unsigned int)SCTP_SB_LIMIT_SND(so),
13220 stcb->asoc.stream_queue_cnt,
13221 stcb->asoc.chunks_on_out_queue,
13222 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13223 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13224 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13227 stcb->block_entry = &be;
13228 error = sbwait(&so->so_snd);
13229 stcb->block_entry = NULL;
13230 if (error || so->so_error || be.error) {
13233 error = so->so_error;
13238 SOCKBUF_UNLOCK(&so->so_snd);
13241 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13242 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13243 asoc, stcb->asoc.total_output_queue_size);
13245 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13248 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13250 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13251 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13255 SOCKBUF_UNLOCK(&so->so_snd);
13258 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13262 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13263 * case NOTE: uio will be null when top/mbuf is passed
13266 if (srcv->sinfo_flags & SCTP_EOF) {
13267 got_all_of_the_send = 1;
13270 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13276 struct sctp_stream_queue_pending *sp;
13277 struct sctp_stream_out *strm;
13280 SCTP_TCB_SEND_LOCK(stcb);
13281 if ((asoc->stream_locked) &&
13282 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13283 SCTP_TCB_SEND_UNLOCK(stcb);
13284 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13288 SCTP_TCB_SEND_UNLOCK(stcb);
13290 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13291 if (strm->last_msg_incomplete == 0) {
13293 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13294 if ((sp == NULL) || (error)) {
13297 SCTP_TCB_SEND_LOCK(stcb);
13298 if (sp->msg_is_complete) {
13299 strm->last_msg_incomplete = 0;
13300 asoc->stream_locked = 0;
13303 * Just got locked to this guy in case of an
13306 strm->last_msg_incomplete = 1;
13307 asoc->stream_locked = 1;
13308 asoc->stream_locked_on = srcv->sinfo_stream;
13309 sp->sender_all_done = 0;
13311 sctp_snd_sb_alloc(stcb, sp->length);
13312 atomic_add_int(&asoc->stream_queue_cnt, 1);
13313 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
13314 sp->strseq = strm->next_sequence_sent;
13315 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_SCTP) {
13316 sctp_misc_ints(SCTP_STRMOUT_LOG_ASSIGN,
13317 (uintptr_t) stcb, sp->length,
13318 (uint32_t) ((srcv->sinfo_stream << 16) | sp->strseq), 0);
13320 strm->next_sequence_sent++;
13322 SCTP_STAT_INCR(sctps_sends_with_unord);
13324 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13325 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13326 SCTP_TCB_SEND_UNLOCK(stcb);
13328 SCTP_TCB_SEND_LOCK(stcb);
13329 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13330 SCTP_TCB_SEND_UNLOCK(stcb);
13332 /* ???? Huh ??? last msg is gone */
13334 panic("Warning: Last msg marked incomplete, yet nothing left?");
13336 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13337 strm->last_msg_incomplete = 0;
13343 while (uio->uio_resid > 0) {
13344 /* How much room do we have? */
13345 struct mbuf *new_tail, *mm;
13347 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13348 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
13352 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13353 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13354 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13357 if (hold_tcblock) {
13358 SCTP_TCB_UNLOCK(stcb);
13361 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13362 if ((mm == NULL) || error) {
13368 /* Update the mbuf and count */
13369 SCTP_TCB_SEND_LOCK(stcb);
13370 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13372 * we need to get out. Peer probably
13376 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13377 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13378 error = ECONNRESET;
13380 SCTP_TCB_SEND_UNLOCK(stcb);
13383 if (sp->tail_mbuf) {
13384 /* tack it to the end */
13385 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13386 sp->tail_mbuf = new_tail;
13388 /* A stolen mbuf */
13390 sp->tail_mbuf = new_tail;
13392 sctp_snd_sb_alloc(stcb, sndout);
13393 atomic_add_int(&sp->length, sndout);
13396 /* Did we reach EOR? */
13397 if ((uio->uio_resid == 0) &&
13398 ((user_marks_eor == 0) ||
13399 (srcv->sinfo_flags & SCTP_EOF) ||
13400 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13401 sp->msg_is_complete = 1;
13403 sp->msg_is_complete = 0;
13405 SCTP_TCB_SEND_UNLOCK(stcb);
13407 if (uio->uio_resid == 0) {
13412 if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
13414 * This is ugly but we must assure locking
13417 if (hold_tcblock == 0) {
13418 SCTP_TCB_LOCK(stcb);
13421 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13422 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13423 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13424 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13430 SCTP_TCB_UNLOCK(stcb);
13433 /* wait for space now */
13434 if (non_blocking) {
13435 /* Non-blocking io in place out */
13438 /* What about the INIT, send it maybe */
13439 if (queue_only_for_init) {
13440 if (hold_tcblock == 0) {
13441 SCTP_TCB_LOCK(stcb);
13444 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13445 /* a collision took us forward? */
13448 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13449 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13453 if ((net->flight_size > net->cwnd) &&
13454 (asoc->sctp_cmt_on_off == 0)) {
13455 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13457 } else if (asoc->ifp_had_enobuf) {
13458 SCTP_STAT_INCR(sctps_ifnomemqueued);
13459 if (net->flight_size > (2 * net->mtu)) {
13462 asoc->ifp_had_enobuf = 0;
13464 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13465 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13466 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13467 (stcb->asoc.total_flight > 0) &&
13468 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13469 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13472 * Ok, Nagle is set on and we have data outstanding.
13473 * Don't send anything and let SACKs drive out the
13474 * data unless wen have a "full" segment to send.
13476 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13477 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13479 SCTP_STAT_INCR(sctps_naglequeued);
13482 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13483 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13484 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13486 SCTP_STAT_INCR(sctps_naglesent);
13489 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13491 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13492 nagle_applies, un_sent);
13493 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13494 stcb->asoc.total_flight,
13495 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13497 if (queue_only_for_init)
13498 queue_only_for_init = 0;
13499 if ((queue_only == 0) && (nagle_applies == 0)) {
13501 * need to start chunk output
13502 * before blocking.. note that if
13503 * a lock is already applied, then
13504 * the input via the net is happening
13505 * and I don't need to start output :-D
13507 if (hold_tcblock == 0) {
13508 if (SCTP_TCB_TRYLOCK(stcb)) {
13510 sctp_chunk_output(inp,
13512 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13515 sctp_chunk_output(inp,
13517 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13519 if (hold_tcblock == 1) {
13520 SCTP_TCB_UNLOCK(stcb);
13524 SOCKBUF_LOCK(&so->so_snd);
13526 * This is a bit strange, but I think it will
13527 * work. The total_output_queue_size is locked and
13528 * protected by the TCB_LOCK, which we just released.
13529 * There is a race that can occur between releasing it
13530 * above, and me getting the socket lock, where sacks
13531 * come in but we have not put the SB_WAIT on the
13532 * so_snd buffer to get the wakeup. After the LOCK
13533 * is applied the sack_processing will also need to
13534 * LOCK the so->so_snd to do the actual sowwakeup(). So
13535 * once we have the socket buffer lock if we recheck the
13536 * size we KNOW we will get to sleep safely with the
13537 * wakeup flag in place.
13539 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13540 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13541 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13542 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13543 asoc, uio->uio_resid);
13546 stcb->block_entry = &be;
13547 error = sbwait(&so->so_snd);
13548 stcb->block_entry = NULL;
13550 if (error || so->so_error || be.error) {
13553 error = so->so_error;
13558 SOCKBUF_UNLOCK(&so->so_snd);
13561 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13562 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13563 asoc, stcb->asoc.total_output_queue_size);
13566 SOCKBUF_UNLOCK(&so->so_snd);
13567 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13571 SCTP_TCB_SEND_LOCK(stcb);
13573 if (sp->msg_is_complete == 0) {
13574 strm->last_msg_incomplete = 1;
13575 asoc->stream_locked = 1;
13576 asoc->stream_locked_on = srcv->sinfo_stream;
13578 sp->sender_all_done = 1;
13579 strm->last_msg_incomplete = 0;
13580 asoc->stream_locked = 0;
13583 SCTP_PRINTF("Huh no sp TSNH?\n");
13584 strm->last_msg_incomplete = 0;
13585 asoc->stream_locked = 0;
13587 SCTP_TCB_SEND_UNLOCK(stcb);
13588 if (uio->uio_resid == 0) {
13589 got_all_of_the_send = 1;
13592 /* We send in a 0, since we do NOT have any locks */
13593 error = sctp_msg_append(stcb, net, top, srcv, 0);
13595 if (srcv->sinfo_flags & SCTP_EOF) {
13597 * This should only happen for Panda for the mbuf
13598 * send case, which does NOT yet support EEOR mode.
13599 * Thus, we can just set this flag to do the proper
13602 got_all_of_the_send = 1;
13610 if ((srcv->sinfo_flags & SCTP_EOF) &&
13611 (got_all_of_the_send == 1)) {
13614 SCTP_STAT_INCR(sctps_sends_with_eof);
13616 if (hold_tcblock == 0) {
13617 SCTP_TCB_LOCK(stcb);
13620 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13621 if (TAILQ_EMPTY(&asoc->send_queue) &&
13622 TAILQ_EMPTY(&asoc->sent_queue) &&
13624 if (asoc->locked_on_sending) {
13627 /* there is nothing queued to send, so I'm done... */
13628 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13629 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13630 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13631 struct sctp_nets *netp;
13633 if (stcb->asoc.alternate) {
13634 netp = stcb->asoc.alternate;
13636 netp = stcb->asoc.primary_destination;
13638 /* only send SHUTDOWN the first time through */
13639 sctp_send_shutdown(stcb, netp);
13640 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13641 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13643 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13644 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13645 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13647 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13648 asoc->primary_destination);
13652 * we still got (or just got) data to send, so set
13656 * XXX sockets draft says that SCTP_EOF should be
13657 * sent with no data. currently, we will allow user
13658 * data to be sent first and move to
13661 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13662 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13663 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13664 if (hold_tcblock == 0) {
13665 SCTP_TCB_LOCK(stcb);
13668 if (asoc->locked_on_sending) {
13669 /* Locked to send out the data */
13670 struct sctp_stream_queue_pending *sp;
13672 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13674 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13675 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13678 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13679 if (TAILQ_EMPTY(&asoc->send_queue) &&
13680 TAILQ_EMPTY(&asoc->sent_queue) &&
13681 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13683 if (free_cnt_applied) {
13684 atomic_add_int(&stcb->asoc.refcnt, -1);
13685 free_cnt_applied = 0;
13687 sctp_abort_an_association(stcb->sctp_ep, stcb,
13688 NULL, SCTP_SO_LOCKED);
13690 * now relock the stcb so everything
13697 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13698 asoc->primary_destination);
13699 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13704 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13705 some_on_control = 1;
13707 if (queue_only_for_init) {
13708 if (hold_tcblock == 0) {
13709 SCTP_TCB_LOCK(stcb);
13712 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13713 /* a collision took us forward? */
13716 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13717 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13721 if ((net->flight_size > net->cwnd) &&
13722 (stcb->asoc.sctp_cmt_on_off == 0)) {
13723 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13725 } else if (asoc->ifp_had_enobuf) {
13726 SCTP_STAT_INCR(sctps_ifnomemqueued);
13727 if (net->flight_size > (2 * net->mtu)) {
13730 asoc->ifp_had_enobuf = 0;
13732 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13733 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13734 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13735 (stcb->asoc.total_flight > 0) &&
13736 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13737 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13739 * Ok, Nagle is set on and we have data outstanding.
13740 * Don't send anything and let SACKs drive out the
13741 * data unless wen have a "full" segment to send.
13743 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13744 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13746 SCTP_STAT_INCR(sctps_naglequeued);
13749 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13750 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13751 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13753 SCTP_STAT_INCR(sctps_naglesent);
13756 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13757 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13758 nagle_applies, un_sent);
13759 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13760 stcb->asoc.total_flight,
13761 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13763 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13764 /* we can attempt to send too. */
13765 if (hold_tcblock == 0) {
13767 * If there is activity recv'ing sacks no need to
13770 if (SCTP_TCB_TRYLOCK(stcb)) {
13771 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13775 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13777 } else if ((queue_only == 0) &&
13778 (stcb->asoc.peers_rwnd == 0) &&
13779 (stcb->asoc.total_flight == 0)) {
13780 /* We get to have a probe outstanding */
13781 if (hold_tcblock == 0) {
13783 SCTP_TCB_LOCK(stcb);
13785 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13786 } else if (some_on_control) {
13787 int num_out, reason, frag_point;
13789 /* Here we do control only */
13790 if (hold_tcblock == 0) {
13792 SCTP_TCB_LOCK(stcb);
13794 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13795 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13796 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13798 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13799 queue_only, stcb->asoc.peers_rwnd, un_sent,
13800 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13801 stcb->asoc.total_output_queue_size, error);
13806 if (local_soresv && stcb) {
13807 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13809 if (create_lock_applied) {
13810 SCTP_ASOC_CREATE_UNLOCK(inp);
13812 if ((stcb) && hold_tcblock) {
13813 SCTP_TCB_UNLOCK(stcb);
13815 if (stcb && free_cnt_applied) {
13816 atomic_add_int(&stcb->asoc.refcnt, -1);
13820 if (mtx_owned(&stcb->tcb_mtx)) {
13821 panic("Leaving with tcb mtx owned?");
13823 if (mtx_owned(&stcb->tcb_send_mtx)) {
13824 panic("Leaving with tcb send mtx owned?");
13830 sctp_validate_no_locks(inp);
13832 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
13839 sctp_m_freem(control);
13846 * generate an AUTHentication chunk, if required
13849 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13850 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13851 struct sctp_tcb *stcb, uint8_t chunk)
13853 struct mbuf *m_auth;
13854 struct sctp_auth_chunk *auth;
13858 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13862 /* sysctl disabled auth? */
13863 if (SCTP_BASE_SYSCTL(sctp_auth_disable))
13866 /* peer doesn't do auth... */
13867 if (!stcb->asoc.peer_supports_auth) {
13870 /* does the requested chunk require auth? */
13871 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13874 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_DONTWAIT, 1, MT_HEADER);
13875 if (m_auth == NULL) {
13879 /* reserve some space if this will be the first mbuf */
13881 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13882 /* fill in the AUTH chunk details */
13883 auth = mtod(m_auth, struct sctp_auth_chunk *);
13884 bzero(auth, sizeof(*auth));
13885 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13886 auth->ch.chunk_flags = 0;
13887 chunk_len = sizeof(*auth) +
13888 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13889 auth->ch.chunk_length = htons(chunk_len);
13890 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13891 /* key id and hmac digest will be computed and filled in upon send */
13893 /* save the offset where the auth was inserted into the chain */
13895 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13896 *offset += SCTP_BUF_LEN(cn);
13899 /* update length and return pointer to the auth chunk */
13900 SCTP_BUF_LEN(m_auth) = chunk_len;
13901 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13902 if (auth_ret != NULL)
13910 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13912 struct nd_prefix *pfx = NULL;
13913 struct nd_pfxrouter *pfxrtr = NULL;
13914 struct sockaddr_in6 gw6;
13916 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13919 /* get prefix entry of address */
13920 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13921 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13923 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13924 &src6->sin6_addr, &pfx->ndpr_mask))
13927 /* no prefix entry in the prefix list */
13929 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13930 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13933 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13934 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13936 /* search installed gateway from prefix entry */
13937 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13938 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13939 gw6.sin6_family = AF_INET6;
13940 gw6.sin6_len = sizeof(struct sockaddr_in6);
13941 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13942 sizeof(struct in6_addr));
13943 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13944 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13945 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13946 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13947 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13948 ro->ro_rt->rt_gateway)) {
13949 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13953 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13960 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13963 struct sockaddr_in *sin, *mask;
13964 struct ifaddr *ifa;
13965 struct in_addr srcnetaddr, gwnetaddr;
13967 if (ro == NULL || ro->ro_rt == NULL ||
13968 sifa->address.sa.sa_family != AF_INET) {
13971 ifa = (struct ifaddr *)sifa->ifa;
13972 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13973 sin = (struct sockaddr_in *)&sifa->address.sin;
13974 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13975 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13976 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13977 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13979 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13980 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13981 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13982 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13983 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13984 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {