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 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4120 SCTP_STAT_INCR(sctps_sendswcrc);
4123 SCTP_ENABLE_UDP_CSUM(o_pak);
4126 #if defined(SCTP_WITH_NO_CSUM)
4127 SCTP_STAT_INCR(sctps_sendnocrc);
4129 m->m_pkthdr.csum_flags = CSUM_SCTP;
4130 m->m_pkthdr.csum_data = 0;
4131 SCTP_STAT_INCR(sctps_sendhwcrc);
4134 /* send it out. table id is taken from stcb */
4135 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4136 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4137 so = SCTP_INP_SO(inp);
4138 SCTP_SOCKET_UNLOCK(so, 0);
4141 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4142 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4143 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4144 atomic_add_int(&stcb->asoc.refcnt, 1);
4145 SCTP_TCB_UNLOCK(stcb);
4146 SCTP_SOCKET_LOCK(so, 0);
4147 SCTP_TCB_LOCK(stcb);
4148 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4151 SCTP_STAT_INCR(sctps_sendpackets);
4152 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4154 SCTP_STAT_INCR(sctps_senderrors);
4156 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4158 /* free tempy routes */
4165 * PMTU check versus smallest asoc MTU goes
4168 if ((ro->ro_rt != NULL) &&
4169 (net->ro._s_addr)) {
4172 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4174 mtu -= sizeof(struct udphdr);
4176 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4177 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4180 } else if (ro->ro_rt == NULL) {
4181 /* route was freed */
4182 if (net->ro._s_addr &&
4183 net->src_addr_selected) {
4184 sctp_free_ifa(net->ro._s_addr);
4185 net->ro._s_addr = NULL;
4187 net->src_addr_selected = 0;
4196 uint32_t flowlabel, flowinfo;
4197 struct ip6_hdr *ip6h;
4198 struct route_in6 ip6route;
4200 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4202 struct sockaddr_in6 lsa6_storage;
4204 u_short prev_port = 0;
4208 flowlabel = net->flowlabel;
4210 flowlabel = stcb->asoc.default_flowlabel;
4212 flowlabel = inp->sctp_ep.default_flowlabel;
4214 if (flowlabel == 0) {
4216 * This means especially, that it is not set
4217 * at the SCTP layer. So use the value from
4220 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4222 flowlabel &= 0x000fffff;
4223 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
4225 len += sizeof(struct udphdr);
4227 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
4230 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4233 SCTP_ALIGN_TO_END(newm, len);
4234 SCTP_BUF_LEN(newm) = len;
4235 SCTP_BUF_NEXT(newm) = m;
4239 if (net->flowidset == 0) {
4240 panic("Flow ID not set");
4243 m->m_pkthdr.flowid = net->flowid;
4244 m->m_flags |= M_FLOWID;
4246 if ((init != NULL) && (init->m_flags & M_FLOWID)) {
4247 m->m_pkthdr.flowid = init->m_pkthdr.flowid;
4248 m->m_flags |= M_FLOWID;
4251 packet_length = sctp_calculate_len(m);
4253 ip6h = mtod(m, struct ip6_hdr *);
4254 /* protect *sin6 from overwrite */
4255 sin6 = (struct sockaddr_in6 *)to;
4259 /* KAME hack: embed scopeid */
4260 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4261 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4265 memset(&ip6route, 0, sizeof(ip6route));
4266 ro = (sctp_route_t *) & ip6route;
4267 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4269 ro = (sctp_route_t *) & net->ro;
4272 * We assume here that inp_flow is in host byte
4273 * order within the TCB!
4275 if (tos_value == 0) {
4277 * This means especially, that it is not set
4278 * at the SCTP layer. So use the value from
4281 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4285 tos_value |= sctp_get_ect(stcb);
4289 flowinfo |= tos_value;
4291 flowinfo |= flowlabel;
4292 ip6h->ip6_flow = htonl(flowinfo);
4294 ip6h->ip6_nxt = IPPROTO_UDP;
4296 ip6h->ip6_nxt = IPPROTO_SCTP;
4298 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4299 ip6h->ip6_dst = sin6->sin6_addr;
4302 * Add SRC address selection here: we can only reuse
4303 * to a limited degree the kame src-addr-sel, since
4304 * we can try their selection but it may not be
4307 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4308 lsa6_tmp.sin6_family = AF_INET6;
4309 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4311 if (net && out_of_asoc_ok == 0) {
4312 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4313 sctp_free_ifa(net->ro._s_addr);
4314 net->ro._s_addr = NULL;
4315 net->src_addr_selected = 0;
4321 if (net->src_addr_selected == 0) {
4322 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4323 /* KAME hack: embed scopeid */
4324 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4325 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4328 /* Cache the source address */
4329 net->ro._s_addr = sctp_source_address_selection(inp,
4335 (void)sa6_recoverscope(sin6);
4336 net->src_addr_selected = 1;
4338 if (net->ro._s_addr == NULL) {
4339 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4340 net->src_addr_selected = 0;
4341 sctp_handle_no_route(stcb, net, so_locked);
4342 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4344 return (EHOSTUNREACH);
4346 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4348 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4349 /* KAME hack: embed scopeid */
4350 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4351 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4354 if (over_addr == NULL) {
4355 struct sctp_ifa *_lsrc;
4357 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4361 if (_lsrc == NULL) {
4362 sctp_handle_no_route(stcb, net, so_locked);
4363 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4365 return (EHOSTUNREACH);
4367 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4368 sctp_free_ifa(_lsrc);
4370 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4371 SCTP_RTALLOC(ro, vrf_id);
4373 (void)sa6_recoverscope(sin6);
4375 lsa6->sin6_port = inp->sctp_lport;
4377 if (ro->ro_rt == NULL) {
4379 * src addr selection failed to find a route
4380 * (or valid source addr), so we can't get
4383 sctp_handle_no_route(stcb, net, so_locked);
4384 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4386 return (EHOSTUNREACH);
4389 * XXX: sa6 may not have a valid sin6_scope_id in
4390 * the non-SCOPEDROUTING case.
4392 bzero(&lsa6_storage, sizeof(lsa6_storage));
4393 lsa6_storage.sin6_family = AF_INET6;
4394 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4395 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4396 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4397 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4402 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4403 lsa6_storage.sin6_port = inp->sctp_lport;
4404 lsa6 = &lsa6_storage;
4405 ip6h->ip6_src = lsa6->sin6_addr;
4408 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4409 sctp_handle_no_route(stcb, net, so_locked);
4410 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4412 return (EHOSTUNREACH);
4414 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4415 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4416 udp->uh_dport = port;
4417 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4419 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4421 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4424 sctphdr->src_port = src_port;
4425 sctphdr->dest_port = dest_port;
4426 sctphdr->v_tag = v_tag;
4427 sctphdr->checksum = 0;
4430 * We set the hop limit now since there is a good
4431 * chance that our ro pointer is now filled
4433 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4434 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4437 /* Copy to be sure something bad is not happening */
4438 sin6->sin6_addr = ip6h->ip6_dst;
4439 lsa6->sin6_addr = ip6h->ip6_src;
4442 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4443 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4444 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4445 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4446 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4448 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4450 * preserve the port and scope for link
4453 prev_scope = sin6->sin6_scope_id;
4454 prev_port = sin6->sin6_port;
4456 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4457 /* failed to prepend data, give up */
4459 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4462 #ifdef SCTP_PACKET_LOGGING
4463 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4464 sctp_packet_log(m, packet_length);
4466 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4468 #if defined(SCTP_WITH_NO_CSUM)
4469 SCTP_STAT_INCR(sctps_sendnocrc);
4471 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4472 SCTP_STAT_INCR(sctps_sendswcrc);
4474 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4475 udp->uh_sum = 0xffff;
4478 #if defined(SCTP_WITH_NO_CSUM)
4479 SCTP_STAT_INCR(sctps_sendnocrc);
4481 m->m_pkthdr.csum_flags = CSUM_SCTP;
4482 m->m_pkthdr.csum_data = 0;
4483 SCTP_STAT_INCR(sctps_sendhwcrc);
4486 /* send it out. table id is taken from stcb */
4487 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4488 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4489 so = SCTP_INP_SO(inp);
4490 SCTP_SOCKET_UNLOCK(so, 0);
4493 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4494 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4495 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4496 atomic_add_int(&stcb->asoc.refcnt, 1);
4497 SCTP_TCB_UNLOCK(stcb);
4498 SCTP_SOCKET_LOCK(so, 0);
4499 SCTP_TCB_LOCK(stcb);
4500 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4504 /* for link local this must be done */
4505 sin6->sin6_scope_id = prev_scope;
4506 sin6->sin6_port = prev_port;
4508 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4509 SCTP_STAT_INCR(sctps_sendpackets);
4510 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4512 SCTP_STAT_INCR(sctps_senderrors);
4515 /* Now if we had a temp route free it */
4521 * PMTU check versus smallest asoc MTU goes
4524 if (ro->ro_rt == NULL) {
4525 /* Route was freed */
4526 if (net->ro._s_addr &&
4527 net->src_addr_selected) {
4528 sctp_free_ifa(net->ro._s_addr);
4529 net->ro._s_addr = NULL;
4531 net->src_addr_selected = 0;
4533 if ((ro->ro_rt != NULL) &&
4534 (net->ro._s_addr)) {
4537 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4539 (stcb->asoc.smallest_mtu > mtu)) {
4540 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4543 net->mtu -= sizeof(struct udphdr);
4547 if (ND_IFINFO(ifp)->linkmtu &&
4548 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4549 sctp_mtu_size_reset(inp,
4551 ND_IFINFO(ifp)->linkmtu);
4559 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4560 ((struct sockaddr *)to)->sa_family);
4562 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4569 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4570 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4575 struct mbuf *m, *m_at, *mp_last;
4576 struct sctp_nets *net;
4577 struct sctp_init_chunk *init;
4578 struct sctp_supported_addr_param *sup_addr;
4579 struct sctp_adaptation_layer_indication *ali;
4580 struct sctp_ecn_supported_param *ecn;
4581 struct sctp_prsctp_supported_param *prsctp;
4582 struct sctp_supported_chunk_types_param *pr_supported;
4583 int cnt_inits_to = 0;
4588 /* INIT's always go to the primary (and usually ONLY address) */
4590 net = stcb->asoc.primary_destination;
4592 net = TAILQ_FIRST(&stcb->asoc.nets);
4597 /* we confirm any address we send an INIT to */
4598 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4599 (void)sctp_set_primary_addr(stcb, NULL, net);
4601 /* we confirm any address we send an INIT to */
4602 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4604 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4606 if (((struct sockaddr *)&(net->ro._l_addr))->sa_family == AF_INET6) {
4608 * special hook, if we are sending to link local it will not
4609 * show up in our private address count.
4611 struct sockaddr_in6 *sin6l;
4613 sin6l = &net->ro._l_addr.sin6;
4614 if (IN6_IS_ADDR_LINKLOCAL(&sin6l->sin6_addr))
4618 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4619 /* This case should not happen */
4620 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4623 /* start the INIT timer */
4624 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4626 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA);
4628 /* No memory, INIT timer will re-attempt. */
4629 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4632 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
4634 * assume peer supports asconf in order to be able to queue local
4635 * address changes while an INIT is in flight and before the assoc
4638 stcb->asoc.peer_supports_asconf = 1;
4639 /* Now lets put the SCTP header in place */
4640 init = mtod(m, struct sctp_init_chunk *);
4641 /* now the chunk header */
4642 init->ch.chunk_type = SCTP_INITIATION;
4643 init->ch.chunk_flags = 0;
4644 /* fill in later from mbuf we build */
4645 init->ch.chunk_length = 0;
4646 /* place in my tag */
4647 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4648 /* set up some of the credits. */
4649 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4650 SCTP_MINIMAL_RWND));
4652 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4653 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4654 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4655 /* now the address restriction */
4656 /* XXX Should we take the address family of the socket into account? */
4657 sup_addr = (struct sctp_supported_addr_param *)((caddr_t)init +
4659 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4662 /* we support 2 types: IPv4/IPv6 */
4663 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + 2 * sizeof(uint16_t));
4664 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
4665 sup_addr->addr_type[1] = htons(SCTP_IPV6_ADDRESS);
4667 /* we support 1 type: IPv6 */
4668 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + sizeof(uint16_t));
4669 sup_addr->addr_type[0] = htons(SCTP_IPV6_ADDRESS);
4670 sup_addr->addr_type[1] = htons(0); /* this is the padding */
4673 /* we support 1 type: IPv4 */
4674 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + sizeof(uint16_t));
4675 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
4676 sup_addr->addr_type[1] = htons(0); /* this is the padding */
4678 SCTP_BUF_LEN(m) += sizeof(struct sctp_supported_addr_param);
4679 /* adaptation layer indication parameter */
4680 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)sup_addr + sizeof(struct sctp_supported_addr_param));
4681 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4682 ali->ph.param_length = htons(sizeof(*ali));
4683 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
4684 SCTP_BUF_LEN(m) += sizeof(*ali);
4685 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
4687 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4688 /* Add NAT friendly parameter */
4689 struct sctp_paramhdr *ph;
4691 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4692 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4693 ph->param_length = htons(sizeof(struct sctp_paramhdr));
4694 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
4695 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ph + sizeof(*ph));
4697 /* now any cookie time extensions */
4698 if (stcb->asoc.cookie_preserve_req) {
4699 struct sctp_cookie_perserve_param *cookie_preserve;
4701 cookie_preserve = (struct sctp_cookie_perserve_param *)(ecn);
4702 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4703 cookie_preserve->ph.param_length = htons(
4704 sizeof(*cookie_preserve));
4705 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4706 SCTP_BUF_LEN(m) += sizeof(*cookie_preserve);
4707 ecn = (struct sctp_ecn_supported_param *)(
4708 (caddr_t)cookie_preserve + sizeof(*cookie_preserve));
4709 stcb->asoc.cookie_preserve_req = 0;
4712 if (stcb->asoc.ecn_allowed == 1) {
4713 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
4714 ecn->ph.param_length = htons(sizeof(*ecn));
4715 SCTP_BUF_LEN(m) += sizeof(*ecn);
4716 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
4719 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
4721 /* And now tell the peer we do pr-sctp */
4722 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
4723 prsctp->ph.param_length = htons(sizeof(*prsctp));
4724 SCTP_BUF_LEN(m) += sizeof(*prsctp);
4726 /* And now tell the peer we do all the extensions */
4727 pr_supported = (struct sctp_supported_chunk_types_param *)
4728 ((caddr_t)prsctp + sizeof(*prsctp));
4729 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4731 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4732 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4733 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4734 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4735 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4736 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4737 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4739 if (stcb->asoc.sctp_nr_sack_on_off == 1) {
4740 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4742 p_len = sizeof(*pr_supported) + num_ext;
4743 pr_supported->ph.param_length = htons(p_len);
4744 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
4745 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4748 /* add authentication parameters */
4749 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4750 struct sctp_auth_random *randp;
4751 struct sctp_auth_hmac_algo *hmacs;
4752 struct sctp_auth_chunk_list *chunks;
4754 /* attach RANDOM parameter, if available */
4755 if (stcb->asoc.authinfo.random != NULL) {
4756 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4757 p_len = sizeof(*randp) + stcb->asoc.authinfo.random_len;
4758 /* random key already contains the header */
4759 bcopy(stcb->asoc.authinfo.random->key, randp, p_len);
4760 /* zero out any padding required */
4761 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
4762 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4764 /* add HMAC_ALGO parameter */
4765 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4766 p_len = sctp_serialize_hmaclist(stcb->asoc.local_hmacs,
4767 (uint8_t *) hmacs->hmac_ids);
4769 p_len += sizeof(*hmacs);
4770 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4771 hmacs->ph.param_length = htons(p_len);
4772 /* zero out any padding required */
4773 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
4774 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4776 /* add CHUNKS parameter */
4777 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4778 p_len = sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks,
4779 chunks->chunk_types);
4781 p_len += sizeof(*chunks);
4782 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4783 chunks->ph.param_length = htons(p_len);
4784 /* zero out any padding required */
4785 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
4786 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4789 /* now the addresses */
4791 struct sctp_scoping scp;
4794 * To optimize this we could put the scoping stuff into a
4795 * structure and remove the individual uint8's from the
4796 * assoc structure. Then we could just sifa in the address
4797 * within the stcb. But for now this is a quick hack to get
4798 * the address stuff teased apart.
4801 scp.ipv4_addr_legal = stcb->asoc.ipv4_addr_legal;
4802 scp.ipv6_addr_legal = stcb->asoc.ipv6_addr_legal;
4803 scp.loopback_scope = stcb->asoc.loopback_scope;
4804 scp.ipv4_local_scope = stcb->asoc.ipv4_local_scope;
4805 scp.local_scope = stcb->asoc.local_scope;
4806 scp.site_scope = stcb->asoc.site_scope;
4808 sctp_add_addresses_to_i_ia(inp, stcb, &scp, m, cnt_inits_to);
4811 /* calulate the size and update pkt header and chunk header */
4813 for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
4814 if (SCTP_BUF_NEXT(m_at) == NULL)
4816 p_len += SCTP_BUF_LEN(m_at);
4818 init->ch.chunk_length = htons(p_len);
4820 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
4821 * here since the timer will drive a retranmission.
4824 /* I don't expect this to execute but we will be safe here */
4826 if ((padval) && (mp_last)) {
4828 * The compiler worries that mp_last may not be set even
4829 * though I think it is impossible :-> however we add
4830 * mp_last here just in case.
4832 ret = sctp_add_pad_tombuf(mp_last, (4 - padval));
4834 /* Houston we have a problem, no space */
4839 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4840 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4841 (struct sockaddr *)&net->ro._l_addr,
4842 m, 0, NULL, 0, 0, 0, 0,
4843 inp->sctp_lport, stcb->rport, htonl(0),
4844 net->port, so_locked, NULL, NULL);
4845 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4846 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4847 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4851 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4852 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4855 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4856 * being equal to the beginning of the params i.e. (iphlen +
4857 * sizeof(struct sctp_init_msg) parse through the parameters to the
4858 * end of the mbuf verifying that all parameters are known.
4860 * For unknown parameters build and return a mbuf with
4861 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4862 * processing this chunk stop, and set *abort_processing to 1.
4864 * By having param_offset be pre-set to where parameters begin it is
4865 * hoped that this routine may be reused in the future by new
4868 struct sctp_paramhdr *phdr, params;
4870 struct mbuf *mat, *op_err;
4871 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4872 int at, limit, pad_needed;
4873 uint16_t ptype, plen, padded_size;
4876 *abort_processing = 0;
4879 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4882 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4883 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4884 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4885 ptype = ntohs(phdr->param_type);
4886 plen = ntohs(phdr->param_length);
4887 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4888 /* wacked parameter */
4889 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4892 limit -= SCTP_SIZE32(plen);
4894 * All parameters for all chunks that we know/understand are
4895 * listed here. We process them other places and make
4896 * appropriate stop actions per the upper bits. However this
4897 * is the generic routine processor's can call to get back
4898 * an operr.. to either incorporate (init-ack) or send.
4900 padded_size = SCTP_SIZE32(plen);
4902 /* Param's with variable size */
4903 case SCTP_HEARTBEAT_INFO:
4904 case SCTP_STATE_COOKIE:
4905 case SCTP_UNRECOG_PARAM:
4906 case SCTP_ERROR_CAUSE_IND:
4910 /* Param's with variable size within a range */
4911 case SCTP_CHUNK_LIST:
4912 case SCTP_SUPPORTED_CHUNK_EXT:
4913 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
4914 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
4919 case SCTP_SUPPORTED_ADDRTYPE:
4920 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
4921 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
4927 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
4928 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
4933 case SCTP_SET_PRIM_ADDR:
4934 case SCTP_DEL_IP_ADDRESS:
4935 case SCTP_ADD_IP_ADDRESS:
4936 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
4937 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
4938 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
4943 /* Param's with a fixed size */
4944 case SCTP_IPV4_ADDRESS:
4945 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
4946 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
4951 case SCTP_IPV6_ADDRESS:
4952 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
4953 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
4958 case SCTP_COOKIE_PRESERVE:
4959 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
4960 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
4965 case SCTP_HAS_NAT_SUPPORT:
4968 case SCTP_PRSCTP_SUPPORTED:
4970 if (padded_size != sizeof(struct sctp_paramhdr)) {
4971 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
4976 case SCTP_ECN_CAPABLE:
4977 if (padded_size != sizeof(struct sctp_ecn_supported_param)) {
4978 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
4983 case SCTP_ULP_ADAPTATION:
4984 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
4985 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
4990 case SCTP_SUCCESS_REPORT:
4991 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
4992 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
4997 case SCTP_HOSTNAME_ADDRESS:
4999 /* We can NOT handle HOST NAME addresses!! */
5002 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5003 *abort_processing = 1;
5004 if (op_err == NULL) {
5005 /* Ok need to try to get a mbuf */
5007 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5009 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5012 l_len += sizeof(struct sctp_paramhdr);
5013 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5015 SCTP_BUF_LEN(op_err) = 0;
5017 * pre-reserve space for ip
5018 * and sctp header and
5022 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5024 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5026 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5027 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5031 /* If we have space */
5032 struct sctp_paramhdr s;
5035 uint32_t cpthis = 0;
5037 pad_needed = 4 - (err_at % 4);
5038 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5039 err_at += pad_needed;
5041 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5042 s.param_length = htons(sizeof(s) + plen);
5043 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5044 err_at += sizeof(s);
5045 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5047 sctp_m_freem(op_err);
5049 * we are out of memory but
5050 * we still need to have a
5051 * look at what to do (the
5052 * system is in trouble
5057 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5064 * we do not recognize the parameter figure out what
5067 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5068 if ((ptype & 0x4000) == 0x4000) {
5069 /* Report bit is set?? */
5070 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5071 if (op_err == NULL) {
5074 /* Ok need to try to get an mbuf */
5076 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5078 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5081 l_len += sizeof(struct sctp_paramhdr);
5082 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5084 SCTP_BUF_LEN(op_err) = 0;
5086 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5088 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5090 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5091 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5095 /* If we have space */
5096 struct sctp_paramhdr s;
5099 uint32_t cpthis = 0;
5101 pad_needed = 4 - (err_at % 4);
5102 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5103 err_at += pad_needed;
5105 s.param_type = htons(SCTP_UNRECOG_PARAM);
5106 s.param_length = htons(sizeof(s) + plen);
5107 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5108 err_at += sizeof(s);
5109 if (plen > sizeof(tempbuf)) {
5110 plen = sizeof(tempbuf);
5112 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5114 sctp_m_freem(op_err);
5116 * we are out of memory but
5117 * we still need to have a
5118 * look at what to do (the
5119 * system is in trouble
5123 goto more_processing;
5125 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5130 if ((ptype & 0x8000) == 0x0000) {
5131 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5134 /* skip this chunk and continue processing */
5135 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5136 at += SCTP_SIZE32(plen);
5141 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5145 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5146 *abort_processing = 1;
5147 if ((op_err == NULL) && phdr) {
5151 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5153 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5155 l_len += (2 * sizeof(struct sctp_paramhdr));
5156 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5158 SCTP_BUF_LEN(op_err) = 0;
5160 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5162 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5164 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5165 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5168 if ((op_err) && phdr) {
5169 struct sctp_paramhdr s;
5172 uint32_t cpthis = 0;
5174 pad_needed = 4 - (err_at % 4);
5175 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5176 err_at += pad_needed;
5178 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5179 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5180 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5181 err_at += sizeof(s);
5182 /* Only copy back the p-hdr that caused the issue */
5183 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5189 sctp_are_there_new_addresses(struct sctp_association *asoc,
5190 struct mbuf *in_initpkt, int offset)
5193 * Given a INIT packet, look through the packet to verify that there
5194 * are NO new addresses. As we go through the parameters add reports
5195 * of any un-understood parameters that require an error. Also we
5196 * must return (1) to drop the packet if we see a un-understood
5197 * parameter that tells us to drop the chunk.
5199 struct sockaddr *sa_touse;
5200 struct sockaddr *sa;
5201 struct sctp_paramhdr *phdr, params;
5202 uint16_t ptype, plen;
5204 struct sctp_nets *net;
5208 struct sockaddr_in sin4, *sa4;
5212 struct sockaddr_in6 sin6, *sa6;
5213 struct ip6_hdr *ip6h;
5218 memset(&sin4, 0, sizeof(sin4));
5219 sin4.sin_family = AF_INET;
5220 sin4.sin_len = sizeof(sin4);
5223 memset(&sin6, 0, sizeof(sin6));
5224 sin6.sin6_family = AF_INET6;
5225 sin6.sin6_len = sizeof(sin6);
5228 /* First what about the src address of the pkt ? */
5229 iph = mtod(in_initpkt, struct ip *);
5230 switch (iph->ip_v) {
5233 /* source addr is IPv4 */
5234 sin4.sin_addr = iph->ip_src;
5235 sa_touse = (struct sockaddr *)&sin4;
5239 case IPV6_VERSION >> 4:
5240 /* source addr is IPv6 */
5241 ip6h = mtod(in_initpkt, struct ip6_hdr *);
5242 sin6.sin6_addr = ip6h->ip6_src;
5243 sa_touse = (struct sockaddr *)&sin6;
5251 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5252 sa = (struct sockaddr *)&net->ro._l_addr;
5253 if (sa->sa_family == sa_touse->sa_family) {
5255 if (sa->sa_family == AF_INET) {
5256 sa4 = (struct sockaddr_in *)sa;
5257 if (sa4->sin_addr.s_addr == sin4.sin_addr.s_addr) {
5264 if (sa->sa_family == AF_INET6) {
5265 sa6 = (struct sockaddr_in6 *)sa;
5266 if (SCTP6_ARE_ADDR_EQUAL(sa6, &sin6)) {
5275 /* New address added! no need to look futher. */
5278 /* Ok so far lets munge through the rest of the packet */
5279 offset += sizeof(struct sctp_init_chunk);
5280 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5283 ptype = ntohs(phdr->param_type);
5284 plen = ntohs(phdr->param_length);
5287 case SCTP_IPV4_ADDRESS:
5289 struct sctp_ipv4addr_param *p4, p4_buf;
5291 phdr = sctp_get_next_param(in_initpkt, offset,
5292 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5293 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5297 p4 = (struct sctp_ipv4addr_param *)phdr;
5298 sin4.sin_addr.s_addr = p4->addr;
5299 sa_touse = (struct sockaddr *)&sin4;
5304 case SCTP_IPV6_ADDRESS:
5306 struct sctp_ipv6addr_param *p6, p6_buf;
5308 phdr = sctp_get_next_param(in_initpkt, offset,
5309 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5310 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5314 p6 = (struct sctp_ipv6addr_param *)phdr;
5315 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5317 sa_touse = (struct sockaddr *)&sin6;
5326 /* ok, sa_touse points to one to check */
5328 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5329 sa = (struct sockaddr *)&net->ro._l_addr;
5330 if (sa->sa_family != sa_touse->sa_family) {
5334 if (sa->sa_family == AF_INET) {
5335 sa4 = (struct sockaddr_in *)sa;
5336 if (sa4->sin_addr.s_addr ==
5337 sin4.sin_addr.s_addr) {
5344 if (sa->sa_family == AF_INET6) {
5345 sa6 = (struct sockaddr_in6 *)sa;
5346 if (SCTP6_ARE_ADDR_EQUAL(
5355 /* New addr added! no need to look further */
5359 offset += SCTP_SIZE32(plen);
5360 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5366 * Given a MBUF chain that was sent into us containing an INIT. Build a
5367 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5368 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5369 * message (i.e. the struct sctp_init_msg).
5372 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5373 struct mbuf *init_pkt, int iphlen, int offset, struct sctphdr *sh,
5374 struct sctp_init_chunk *init_chk, uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5376 struct sctp_association *asoc;
5377 struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last;
5378 struct sctp_init_ack_chunk *initack;
5379 struct sctp_adaptation_layer_indication *ali;
5380 struct sctp_ecn_supported_param *ecn;
5381 struct sctp_prsctp_supported_param *prsctp;
5382 struct sctp_supported_chunk_types_param *pr_supported;
5383 union sctp_sockstore store, store1, *over_addr;
5386 struct sockaddr_in *sin, *to_sin;
5390 struct sockaddr_in6 *sin6, *to_sin6;
5396 struct ip6_hdr *ip6;
5399 struct sockaddr *to;
5400 struct sctp_state_cookie stc;
5401 struct sctp_nets *net = NULL;
5402 uint8_t *signature = NULL;
5403 int cnt_inits_to = 0;
5404 uint16_t his_limit, i_want;
5405 int abort_flag, padval;
5408 int nat_friendly = 0;
5416 if ((asoc != NULL) &&
5417 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5418 (sctp_are_there_new_addresses(asoc, init_pkt, offset))) {
5419 /* new addresses, out of here in non-cookie-wait states */
5421 * Send a ABORT, we don't add the new address error clause
5422 * though we even set the T bit and copy in the 0 tag.. this
5423 * looks no different than if no listener was present.
5425 sctp_send_abort(init_pkt, iphlen, sh, 0, NULL, vrf_id, port);
5429 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5430 (offset + sizeof(struct sctp_init_chunk)),
5431 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5434 sctp_send_abort(init_pkt, iphlen, sh,
5435 init_chk->init.initiate_tag, op_err, vrf_id, port);
5438 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
5440 /* No memory, INIT timer will re-attempt. */
5442 sctp_m_freem(op_err);
5445 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
5447 /* the time I built cookie */
5448 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5450 /* populate any tie tags */
5452 /* unlock before tag selections */
5453 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5454 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5455 stc.cookie_life = asoc->cookie_life;
5456 net = asoc->primary_destination;
5458 stc.tie_tag_my_vtag = 0;
5459 stc.tie_tag_peer_vtag = 0;
5460 /* life I will award this cookie */
5461 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5464 /* copy in the ports for later check */
5465 stc.myport = sh->dest_port;
5466 stc.peerport = sh->src_port;
5469 * If we wanted to honor cookie life extentions, we would add to
5470 * stc.cookie_life. For now we should NOT honor any extension
5472 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5473 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5474 struct inpcb *in_inp;
5476 /* Its a V6 socket */
5477 in_inp = (struct inpcb *)inp;
5478 stc.ipv6_addr_legal = 1;
5479 /* Now look at the binding flag to see if V4 will be legal */
5480 if (SCTP_IPV6_V6ONLY(in_inp) == 0) {
5481 stc.ipv4_addr_legal = 1;
5483 /* V4 addresses are NOT legal on the association */
5484 stc.ipv4_addr_legal = 0;
5487 /* Its a V4 socket, no - V6 */
5488 stc.ipv4_addr_legal = 1;
5489 stc.ipv6_addr_legal = 0;
5492 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5497 /* now for scope setup */
5498 memset((caddr_t)&store, 0, sizeof(store));
5499 memset((caddr_t)&store1, 0, sizeof(store1));
5502 to_sin = &store1.sin;
5506 to_sin6 = &store1.sin6;
5508 iph = mtod(init_pkt, struct ip *);
5509 /* establish the to_addr's */
5510 switch (iph->ip_v) {
5513 to_sin->sin_port = sh->dest_port;
5514 to_sin->sin_family = AF_INET;
5515 to_sin->sin_len = sizeof(struct sockaddr_in);
5516 to_sin->sin_addr = iph->ip_dst;
5520 case IPV6_VERSION >> 4:
5521 ip6 = mtod(init_pkt, struct ip6_hdr *);
5522 to_sin6->sin6_addr = ip6->ip6_dst;
5523 to_sin6->sin6_scope_id = 0;
5524 to_sin6->sin6_port = sh->dest_port;
5525 to_sin6->sin6_family = AF_INET6;
5526 to_sin6->sin6_len = sizeof(struct sockaddr_in6);
5535 to = (struct sockaddr *)&store;
5536 switch (iph->ip_v) {
5540 sin->sin_family = AF_INET;
5541 sin->sin_len = sizeof(struct sockaddr_in);
5542 sin->sin_port = sh->src_port;
5543 sin->sin_addr = iph->ip_src;
5544 /* lookup address */
5545 stc.address[0] = sin->sin_addr.s_addr;
5549 stc.addr_type = SCTP_IPV4_ADDRESS;
5550 /* local from address */
5551 stc.laddress[0] = to_sin->sin_addr.s_addr;
5552 stc.laddress[1] = 0;
5553 stc.laddress[2] = 0;
5554 stc.laddress[3] = 0;
5555 stc.laddr_type = SCTP_IPV4_ADDRESS;
5556 /* scope_id is only for v6 */
5558 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5559 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
5564 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5565 /* Must use the address in this case */
5566 if (sctp_is_address_on_local_host((struct sockaddr *)sin, vrf_id)) {
5567 stc.loopback_scope = 1;
5570 stc.local_scope = 0;
5576 case IPV6_VERSION >> 4:
5578 ip6 = mtod(init_pkt, struct ip6_hdr *);
5579 sin6->sin6_family = AF_INET6;
5580 sin6->sin6_len = sizeof(struct sockaddr_in6);
5581 sin6->sin6_port = sh->src_port;
5582 sin6->sin6_addr = ip6->ip6_src;
5583 /* lookup address */
5584 memcpy(&stc.address, &sin6->sin6_addr,
5585 sizeof(struct in6_addr));
5586 sin6->sin6_scope_id = 0;
5587 stc.addr_type = SCTP_IPV6_ADDRESS;
5589 if (sctp_is_address_on_local_host((struct sockaddr *)sin6, vrf_id)) {
5591 * FIX ME: does this have scope from
5594 (void)sa6_recoverscope(sin6);
5595 stc.scope_id = sin6->sin6_scope_id;
5596 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
5597 stc.loopback_scope = 1;
5598 stc.local_scope = 0;
5601 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
5603 * If the new destination is a
5604 * LINK_LOCAL we must have common
5605 * both site and local scope. Don't
5606 * set local scope though since we
5607 * must depend on the source to be
5608 * added implicitly. We cannot
5609 * assure just because we share one
5610 * link that all links are common.
5612 stc.local_scope = 0;
5616 * we start counting for the private
5617 * address stuff at 1. since the
5618 * link local we source from won't
5619 * show up in our scoped count.
5623 * pull out the scope_id from
5627 * FIX ME: does this have scope from
5630 (void)sa6_recoverscope(sin6);
5631 stc.scope_id = sin6->sin6_scope_id;
5632 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
5633 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
5635 * If the new destination is
5636 * SITE_LOCAL then we must have site
5641 memcpy(&stc.laddress, &to_sin6->sin6_addr, sizeof(struct in6_addr));
5642 stc.laddr_type = SCTP_IPV6_ADDRESS;
5652 /* set the scope per the existing tcb */
5655 struct sctp_nets *lnet;
5659 stc.loopback_scope = asoc->loopback_scope;
5660 stc.ipv4_scope = asoc->ipv4_local_scope;
5661 stc.site_scope = asoc->site_scope;
5662 stc.local_scope = asoc->local_scope;
5664 /* Why do we not consider IPv4 LL addresses? */
5665 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5666 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5667 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5669 * if we have a LL address, start
5677 /* use the net pointer */
5678 to = (struct sockaddr *)&net->ro._l_addr;
5679 switch (to->sa_family) {
5682 sin = (struct sockaddr_in *)to;
5683 stc.address[0] = sin->sin_addr.s_addr;
5687 stc.addr_type = SCTP_IPV4_ADDRESS;
5688 if (net->src_addr_selected == 0) {
5690 * strange case here, the INIT should have
5691 * did the selection.
5693 net->ro._s_addr = sctp_source_address_selection(inp,
5694 stcb, (sctp_route_t *) & net->ro,
5696 if (net->ro._s_addr == NULL)
5699 net->src_addr_selected = 1;
5702 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5703 stc.laddress[1] = 0;
5704 stc.laddress[2] = 0;
5705 stc.laddress[3] = 0;
5706 stc.laddr_type = SCTP_IPV4_ADDRESS;
5707 /* scope_id is only for v6 */
5713 sin6 = (struct sockaddr_in6 *)to;
5714 memcpy(&stc.address, &sin6->sin6_addr,
5715 sizeof(struct in6_addr));
5716 stc.addr_type = SCTP_IPV6_ADDRESS;
5717 stc.scope_id = sin6->sin6_scope_id;
5718 if (net->src_addr_selected == 0) {
5720 * strange case here, the INIT should have
5721 * did the selection.
5723 net->ro._s_addr = sctp_source_address_selection(inp,
5724 stcb, (sctp_route_t *) & net->ro,
5726 if (net->ro._s_addr == NULL)
5729 net->src_addr_selected = 1;
5731 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5732 sizeof(struct in6_addr));
5733 stc.laddr_type = SCTP_IPV6_ADDRESS;
5738 /* Now lets put the SCTP header in place */
5739 initack = mtod(m, struct sctp_init_ack_chunk *);
5740 /* Save it off for quick ref */
5741 stc.peers_vtag = init_chk->init.initiate_tag;
5743 memcpy(stc.identification, SCTP_VERSION_STRING,
5744 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5745 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5746 /* now the chunk header */
5747 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5748 initack->ch.chunk_flags = 0;
5749 /* fill in later from mbuf we build */
5750 initack->ch.chunk_length = 0;
5751 /* place in my tag */
5752 if ((asoc != NULL) &&
5753 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5754 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5755 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5756 /* re-use the v-tags and init-seq here */
5757 initack->init.initiate_tag = htonl(asoc->my_vtag);
5758 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5760 uint32_t vtag, itsn;
5762 if (hold_inp_lock) {
5763 SCTP_INP_INCR_REF(inp);
5764 SCTP_INP_RUNLOCK(inp);
5767 atomic_add_int(&asoc->refcnt, 1);
5768 SCTP_TCB_UNLOCK(stcb);
5770 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5771 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5773 * Got a duplicate vtag on some guy behind a
5774 * nat make sure we don't use it.
5778 initack->init.initiate_tag = htonl(vtag);
5779 /* get a TSN to use too */
5780 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5781 initack->init.initial_tsn = htonl(itsn);
5782 SCTP_TCB_LOCK(stcb);
5783 atomic_add_int(&asoc->refcnt, -1);
5785 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5786 initack->init.initiate_tag = htonl(vtag);
5787 /* get a TSN to use too */
5788 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5790 if (hold_inp_lock) {
5791 SCTP_INP_RLOCK(inp);
5792 SCTP_INP_DECR_REF(inp);
5795 /* save away my tag to */
5796 stc.my_vtag = initack->init.initiate_tag;
5798 /* set up some of the credits. */
5799 so = inp->sctp_socket;
5801 /* memory problem */
5805 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5807 /* set what I want */
5808 his_limit = ntohs(init_chk->init.num_inbound_streams);
5809 /* choose what I want */
5811 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5812 i_want = asoc->streamoutcnt;
5814 i_want = inp->sctp_ep.pre_open_stream_count;
5817 i_want = inp->sctp_ep.pre_open_stream_count;
5819 if (his_limit < i_want) {
5820 /* I Want more :< */
5821 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5823 /* I can have what I want :> */
5824 initack->init.num_outbound_streams = htons(i_want);
5826 /* tell him his limt. */
5827 initack->init.num_inbound_streams =
5828 htons(inp->sctp_ep.max_open_streams_intome);
5830 /* adaptation layer indication parameter */
5831 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack));
5832 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5833 ali->ph.param_length = htons(sizeof(*ali));
5834 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
5835 SCTP_BUF_LEN(m) += sizeof(*ali);
5836 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
5839 if (((asoc != NULL) && (asoc->ecn_allowed == 1)) ||
5840 (inp->sctp_ecn_enable == 1)) {
5841 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
5842 ecn->ph.param_length = htons(sizeof(*ecn));
5843 SCTP_BUF_LEN(m) += sizeof(*ecn);
5845 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
5848 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
5850 /* And now tell the peer we do pr-sctp */
5851 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
5852 prsctp->ph.param_length = htons(sizeof(*prsctp));
5853 SCTP_BUF_LEN(m) += sizeof(*prsctp);
5855 /* Add NAT friendly parameter */
5856 struct sctp_paramhdr *ph;
5858 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5859 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5860 ph->param_length = htons(sizeof(struct sctp_paramhdr));
5861 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
5863 /* And now tell the peer we do all the extensions */
5864 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5865 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5867 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5868 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5869 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5870 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5871 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5872 if (!SCTP_BASE_SYSCTL(sctp_auth_disable))
5873 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5874 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
5875 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5876 p_len = sizeof(*pr_supported) + num_ext;
5877 pr_supported->ph.param_length = htons(p_len);
5878 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
5879 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5881 /* add authentication parameters */
5882 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
5883 struct sctp_auth_random *randp;
5884 struct sctp_auth_hmac_algo *hmacs;
5885 struct sctp_auth_chunk_list *chunks;
5886 uint16_t random_len;
5888 /* generate and add RANDOM parameter */
5889 random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5890 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5891 randp->ph.param_type = htons(SCTP_RANDOM);
5892 p_len = sizeof(*randp) + random_len;
5893 randp->ph.param_length = htons(p_len);
5894 SCTP_READ_RANDOM(randp->random_data, random_len);
5895 /* zero out any padding required */
5896 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
5897 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5899 /* add HMAC_ALGO parameter */
5900 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5901 p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5902 (uint8_t *) hmacs->hmac_ids);
5904 p_len += sizeof(*hmacs);
5905 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5906 hmacs->ph.param_length = htons(p_len);
5907 /* zero out any padding required */
5908 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
5909 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5911 /* add CHUNKS parameter */
5912 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5913 p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5914 chunks->chunk_types);
5916 p_len += sizeof(*chunks);
5917 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5918 chunks->ph.param_length = htons(p_len);
5919 /* zero out any padding required */
5920 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
5921 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5925 /* now the addresses */
5927 struct sctp_scoping scp;
5930 * To optimize this we could put the scoping stuff into a
5931 * structure and remove the individual uint8's from the stc
5932 * structure. Then we could just sifa in the address within
5933 * the stc.. but for now this is a quick hack to get the
5934 * address stuff teased apart.
5936 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5937 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5938 scp.loopback_scope = stc.loopback_scope;
5939 scp.ipv4_local_scope = stc.ipv4_scope;
5940 scp.local_scope = stc.local_scope;
5941 scp.site_scope = stc.site_scope;
5942 m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to);
5945 /* tack on the operational error if present */
5954 llen += SCTP_BUF_LEN(ol);
5955 ol = SCTP_BUF_NEXT(ol);
5958 /* must add a pad to the param */
5959 uint32_t cpthis = 0;
5962 padlen = 4 - (llen % 4);
5963 m_copyback(op_err, llen, padlen, (caddr_t)&cpthis);
5965 while (SCTP_BUF_NEXT(m_at) != NULL) {
5966 m_at = SCTP_BUF_NEXT(m_at);
5968 SCTP_BUF_NEXT(m_at) = op_err;
5969 while (SCTP_BUF_NEXT(m_at) != NULL) {
5970 m_at = SCTP_BUF_NEXT(m_at);
5973 /* pre-calulate the size and update pkt header and chunk header */
5975 for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5976 p_len += SCTP_BUF_LEN(m_tmp);
5977 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5978 /* m_tmp should now point to last one */
5983 /* Now we must build a cookie */
5984 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
5985 if (m_cookie == NULL) {
5986 /* memory problem */
5990 /* Now append the cookie to the end and update the space/size */
5991 SCTP_BUF_NEXT(m_tmp) = m_cookie;
5993 for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5994 p_len += SCTP_BUF_LEN(m_tmp);
5995 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5996 /* m_tmp should now point to last one */
6002 * Place in the size, but we don't include the last pad (if any) in
6005 initack->ch.chunk_length = htons(p_len);
6008 * Time to sign the cookie, we don't sign over the cookie signature
6009 * though thus we set trailer.
6011 (void)sctp_hmac_m(SCTP_HMAC,
6012 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6013 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6014 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6016 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6017 * here since the timer will drive a retranmission.
6020 if ((padval) && (mp_last)) {
6021 /* see my previous comments on mp_last */
6022 if (sctp_add_pad_tombuf(mp_last, (4 - padval))) {
6023 /* Houston we have a problem, no space */
6028 if (stc.loopback_scope) {
6029 over_addr = &store1;
6034 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6036 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6037 port, SCTP_SO_NOT_LOCKED, over_addr, init_pkt);
6038 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6043 sctp_prune_prsctp(struct sctp_tcb *stcb,
6044 struct sctp_association *asoc,
6045 struct sctp_sndrcvinfo *srcv,
6049 struct sctp_tmit_chunk *chk, *nchk;
6051 SCTP_TCB_LOCK_ASSERT(stcb);
6052 if ((asoc->peer_supports_prsctp) &&
6053 (asoc->sent_queue_cnt_removeable > 0)) {
6054 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6056 * Look for chunks marked with the PR_SCTP flag AND
6057 * the buffer space flag. If the one being sent is
6058 * equal or greater priority then purge the old one
6059 * and free some space.
6061 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6063 * This one is PR-SCTP AND buffer space
6066 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6068 * Lower numbers equates to higher
6069 * priority so if the one we are
6070 * looking at has a larger or equal
6071 * priority we want to drop the data
6072 * and NOT retransmit it.
6076 * We release the book_size
6077 * if the mbuf is here
6082 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6086 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6089 freed_spc += ret_spc;
6090 if (freed_spc >= dataout) {
6093 } /* if chunk was present */
6094 } /* if of sufficent priority */
6095 } /* if chunk has enabled */
6096 } /* tailqforeach */
6098 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6099 /* Here we must move to the sent queue and mark */
6100 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6101 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6104 * We release the book_size
6105 * if the mbuf is here
6109 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6112 freed_spc += ret_spc;
6113 if (freed_spc >= dataout) {
6116 } /* end if chk->data */
6117 } /* end if right class */
6118 } /* end if chk pr-sctp */
6119 } /* tailqforeachsafe (chk) */
6120 } /* if enabled in asoc */
6124 sctp_get_frag_point(struct sctp_tcb *stcb,
6125 struct sctp_association *asoc)
6130 * For endpoints that have both v6 and v4 addresses we must reserve
6131 * room for the ipv6 header, for those that are only dealing with V4
6132 * we use a larger frag point.
6134 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6135 ovh = SCTP_MED_OVERHEAD;
6137 ovh = SCTP_MED_V4_OVERHEAD;
6140 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6141 siz = asoc->smallest_mtu - ovh;
6143 siz = (stcb->asoc.sctp_frag_point - ovh);
6145 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6147 /* A data chunk MUST fit in a cluster */
6148 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6151 /* adjust for an AUTH chunk if DATA requires auth */
6152 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6153 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6156 /* make it an even word boundary please */
6163 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6167 * We assume that the user wants PR_SCTP_TTL if the user provides a
6168 * positive lifetime but does not specify any PR_SCTP policy. This
6169 * is a BAD assumption and causes problems at least with the
6170 * U-Vancovers MPI folks. I will change this to be no policy means
6173 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6174 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6179 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6180 case CHUNK_FLAGS_PR_SCTP_BUF:
6182 * Time to live is a priority stored in tv_sec when doing
6183 * the buffer drop thing.
6185 sp->ts.tv_sec = sp->timetolive;
6188 case CHUNK_FLAGS_PR_SCTP_TTL:
6192 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6193 tv.tv_sec = sp->timetolive / 1000;
6194 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6196 * TODO sctp_constants.h needs alternative time
6197 * macros when _KERNEL is undefined.
6199 timevaladd(&sp->ts, &tv);
6202 case CHUNK_FLAGS_PR_SCTP_RTX:
6204 * Time to live is a the number or retransmissions stored in
6207 sp->ts.tv_sec = sp->timetolive;
6211 SCTPDBG(SCTP_DEBUG_USRREQ1,
6212 "Unknown PR_SCTP policy %u.\n",
6213 PR_SCTP_POLICY(sp->sinfo_flags));
6219 sctp_msg_append(struct sctp_tcb *stcb,
6220 struct sctp_nets *net,
6222 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6226 struct sctp_stream_queue_pending *sp = NULL;
6227 struct sctp_stream_out *strm;
6230 * Given an mbuf chain, put it into the association send queue and
6231 * place it on the wheel
6233 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6234 /* Invalid stream number */
6235 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6239 if ((stcb->asoc.stream_locked) &&
6240 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6241 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6245 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6246 /* Now can we send this? */
6247 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6248 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6249 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6250 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6251 /* got data while shutting down */
6252 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6256 sctp_alloc_a_strmoq(stcb, sp);
6258 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6262 sp->sinfo_flags = srcv->sinfo_flags;
6263 sp->timetolive = srcv->sinfo_timetolive;
6264 sp->ppid = srcv->sinfo_ppid;
6265 sp->context = srcv->sinfo_context;
6267 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6269 atomic_add_int(&sp->net->ref_count, 1);
6273 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6274 sp->stream = srcv->sinfo_stream;
6275 sp->msg_is_complete = 1;
6276 sp->sender_all_done = 1;
6279 sp->tail_mbuf = NULL;
6280 sctp_set_prsctp_policy(sp);
6282 * We could in theory (for sendall) sifa the length in, but we would
6283 * still have to hunt through the chain since we need to setup the
6287 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6288 if (SCTP_BUF_NEXT(at) == NULL)
6290 sp->length += SCTP_BUF_LEN(at);
6292 if (srcv->sinfo_keynumber_valid) {
6293 sp->auth_keyid = srcv->sinfo_keynumber;
6295 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6297 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6298 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6299 sp->holds_key_ref = 1;
6301 if (hold_stcb_lock == 0) {
6302 SCTP_TCB_SEND_LOCK(stcb);
6304 sctp_snd_sb_alloc(stcb, sp->length);
6305 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6306 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6307 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
6308 sp->strseq = strm->next_sequence_sent;
6309 strm->next_sequence_sent++;
6311 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6313 if (hold_stcb_lock == 0) {
6314 SCTP_TCB_SEND_UNLOCK(stcb);
6324 static struct mbuf *
6325 sctp_copy_mbufchain(struct mbuf *clonechain,
6326 struct mbuf *outchain,
6327 struct mbuf **endofchain,
6330 uint8_t copy_by_ref)
6333 struct mbuf *appendchain;
6337 if (endofchain == NULL) {
6341 sctp_m_freem(outchain);
6344 if (can_take_mbuf) {
6345 appendchain = clonechain;
6348 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6350 /* Its not in a cluster */
6351 if (*endofchain == NULL) {
6352 /* lets get a mbuf cluster */
6353 if (outchain == NULL) {
6354 /* This is the general case */
6356 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6357 if (outchain == NULL) {
6360 SCTP_BUF_LEN(outchain) = 0;
6361 *endofchain = outchain;
6362 /* get the prepend space */
6363 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6366 * We really should not get a NULL
6372 if (SCTP_BUF_NEXT(m) == NULL) {
6376 m = SCTP_BUF_NEXT(m);
6379 if (*endofchain == NULL) {
6381 * huh, TSNH XXX maybe we
6384 sctp_m_freem(outchain);
6388 /* get the new end of length */
6389 len = M_TRAILINGSPACE(*endofchain);
6391 /* how much is left at the end? */
6392 len = M_TRAILINGSPACE(*endofchain);
6394 /* Find the end of the data, for appending */
6395 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6397 /* Now lets copy it out */
6398 if (len >= sizeofcpy) {
6399 /* It all fits, copy it in */
6400 m_copydata(clonechain, 0, sizeofcpy, cp);
6401 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6403 /* fill up the end of the chain */
6405 m_copydata(clonechain, 0, len, cp);
6406 SCTP_BUF_LEN((*endofchain)) += len;
6407 /* now we need another one */
6410 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6415 SCTP_BUF_NEXT((*endofchain)) = m;
6417 cp = mtod((*endofchain), caddr_t);
6418 m_copydata(clonechain, len, sizeofcpy, cp);
6419 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6423 /* copy the old fashion way */
6424 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_DONTWAIT);
6425 #ifdef SCTP_MBUF_LOGGING
6426 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6429 for (mat = appendchain; mat; mat = SCTP_BUF_NEXT(mat)) {
6430 if (SCTP_BUF_IS_EXTENDED(mat)) {
6431 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6438 if (appendchain == NULL) {
6441 sctp_m_freem(outchain);
6445 /* tack on to the end */
6446 if (*endofchain != NULL) {
6447 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6451 if (SCTP_BUF_NEXT(m) == NULL) {
6452 SCTP_BUF_NEXT(m) = appendchain;
6455 m = SCTP_BUF_NEXT(m);
6459 * save off the end and update the end-chain postion
6463 if (SCTP_BUF_NEXT(m) == NULL) {
6467 m = SCTP_BUF_NEXT(m);
6471 /* save off the end and update the end-chain postion */
6474 if (SCTP_BUF_NEXT(m) == NULL) {
6478 m = SCTP_BUF_NEXT(m);
6480 return (appendchain);
6485 sctp_med_chunk_output(struct sctp_inpcb *inp,
6486 struct sctp_tcb *stcb,
6487 struct sctp_association *asoc,
6490 int control_only, int from_where,
6491 struct timeval *now, int *now_filled, int frag_point, int so_locked
6492 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6498 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6499 uint32_t val SCTP_UNUSED)
6501 struct sctp_copy_all *ca;
6504 int added_control = 0;
6505 int un_sent, do_chunk_output = 1;
6506 struct sctp_association *asoc;
6507 struct sctp_nets *net;
6509 ca = (struct sctp_copy_all *)ptr;
6510 if (ca->m == NULL) {
6513 if (ca->inp != inp) {
6517 if ((ca->m) && ca->sndlen) {
6518 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_DONTWAIT);
6520 /* can't copy so we are done */
6524 #ifdef SCTP_MBUF_LOGGING
6525 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6528 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6529 if (SCTP_BUF_IS_EXTENDED(mat)) {
6530 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6538 SCTP_TCB_LOCK_ASSERT(stcb);
6539 if (stcb->asoc.alternate) {
6540 net = stcb->asoc.alternate;
6542 net = stcb->asoc.primary_destination;
6544 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6545 /* Abort this assoc with m as the user defined reason */
6547 struct sctp_paramhdr *ph;
6549 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_DONTWAIT);
6551 ph = mtod(m, struct sctp_paramhdr *);
6552 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6553 ph->param_length = htons(ca->sndlen);
6556 * We add one here to keep the assoc from
6557 * dis-appearing on us.
6559 atomic_add_int(&stcb->asoc.refcnt, 1);
6560 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6562 * sctp_abort_an_association calls sctp_free_asoc()
6563 * free association will NOT free it since we
6564 * incremented the refcnt .. we do this to prevent
6565 * it being freed and things getting tricky since we
6566 * could end up (from free_asoc) calling inpcb_free
6567 * which would get a recursive lock call to the
6568 * iterator lock.. But as a consequence of that the
6569 * stcb will return to us un-locked.. since
6570 * free_asoc returns with either no TCB or the TCB
6571 * unlocked, we must relock.. to unlock in the
6572 * iterator timer :-0
6574 SCTP_TCB_LOCK(stcb);
6575 atomic_add_int(&stcb->asoc.refcnt, -1);
6576 goto no_chunk_output;
6580 ret = sctp_msg_append(stcb, net, m,
6584 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6585 /* shutdown this assoc */
6588 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6590 if (TAILQ_EMPTY(&asoc->send_queue) &&
6591 TAILQ_EMPTY(&asoc->sent_queue) &&
6593 if (asoc->locked_on_sending) {
6597 * there is nothing queued to send, so I'm
6600 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6601 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6602 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6604 * only send SHUTDOWN the first time
6607 sctp_send_shutdown(stcb, net);
6608 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6609 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6611 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6612 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6613 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6615 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6616 asoc->primary_destination);
6618 do_chunk_output = 0;
6622 * we still got (or just got) data to send,
6623 * so set SHUTDOWN_PENDING
6626 * XXX sockets draft says that SCTP_EOF
6627 * should be sent with no data. currently,
6628 * we will allow user data to be sent first
6629 * and move to SHUTDOWN-PENDING
6631 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6632 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6633 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6634 if (asoc->locked_on_sending) {
6636 * Locked to send out the
6639 struct sctp_stream_queue_pending *sp;
6641 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6643 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6644 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6647 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6648 if (TAILQ_EMPTY(&asoc->send_queue) &&
6649 TAILQ_EMPTY(&asoc->sent_queue) &&
6650 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6652 atomic_add_int(&stcb->asoc.refcnt, 1);
6653 sctp_abort_an_association(stcb->sctp_ep, stcb,
6654 NULL, SCTP_SO_NOT_LOCKED);
6655 atomic_add_int(&stcb->asoc.refcnt, -1);
6656 goto no_chunk_output;
6658 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6659 asoc->primary_destination);
6665 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6666 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6668 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6669 (stcb->asoc.total_flight > 0) &&
6670 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))
6672 do_chunk_output = 0;
6674 if (do_chunk_output)
6675 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6676 else if (added_control) {
6677 int num_out = 0, reason = 0, now_filled = 0;
6681 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6682 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6683 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6694 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6696 struct sctp_copy_all *ca;
6698 ca = (struct sctp_copy_all *)ptr;
6700 * Do a notify here? Kacheong suggests that the notify be done at
6701 * the send time.. so you would push up a notification if any send
6702 * failed. Don't know if this is feasable since the only failures we
6703 * have is "memory" related and if you cannot get an mbuf to send
6704 * the data you surely can't get an mbuf to send up to notify the
6705 * user you can't send the data :->
6708 /* now free everything */
6709 sctp_m_freem(ca->m);
6710 SCTP_FREE(ca, SCTP_M_COPYAL);
6714 #define MC_ALIGN(m, len) do { \
6715 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \
6720 static struct mbuf *
6721 sctp_copy_out_all(struct uio *uio, int len)
6723 struct mbuf *ret, *at;
6724 int left, willcpy, cancpy, error;
6726 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAIT, 1, MT_DATA);
6732 SCTP_BUF_LEN(ret) = 0;
6733 /* save space for the data chunk header */
6734 cancpy = M_TRAILINGSPACE(ret);
6735 willcpy = min(cancpy, left);
6738 /* Align data to the end */
6739 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6745 SCTP_BUF_LEN(at) = willcpy;
6746 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6749 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAIT, 1, MT_DATA);
6750 if (SCTP_BUF_NEXT(at) == NULL) {
6753 at = SCTP_BUF_NEXT(at);
6754 SCTP_BUF_LEN(at) = 0;
6755 cancpy = M_TRAILINGSPACE(at);
6756 willcpy = min(cancpy, left);
6763 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6764 struct sctp_sndrcvinfo *srcv)
6767 struct sctp_copy_all *ca;
6769 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6773 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6776 memset(ca, 0, sizeof(struct sctp_copy_all));
6780 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6783 * take off the sendall flag, it would be bad if we failed to do
6786 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6787 /* get length and mbuf chain */
6789 ca->sndlen = uio->uio_resid;
6790 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6791 if (ca->m == NULL) {
6792 SCTP_FREE(ca, SCTP_M_COPYAL);
6793 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6797 /* Gather the length of the send */
6803 ca->sndlen += SCTP_BUF_LEN(m);
6804 m = SCTP_BUF_NEXT(m);
6808 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6809 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6810 SCTP_ASOC_ANY_STATE,
6812 sctp_sendall_completes, inp, 1);
6814 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6815 SCTP_FREE(ca, SCTP_M_COPYAL);
6816 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6824 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6826 struct sctp_tmit_chunk *chk, *nchk;
6828 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6829 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6830 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6832 sctp_m_freem(chk->data);
6835 asoc->ctrl_queue_cnt--;
6836 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6842 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6844 struct sctp_association *asoc;
6845 struct sctp_tmit_chunk *chk, *nchk;
6846 struct sctp_asconf_chunk *acp;
6849 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6850 /* find SCTP_ASCONF chunk in queue */
6851 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6853 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6854 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6859 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6861 sctp_m_freem(chk->data);
6864 asoc->ctrl_queue_cnt--;
6865 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6872 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6873 struct sctp_association *asoc,
6874 struct sctp_tmit_chunk **data_list,
6876 struct sctp_nets *net)
6879 struct sctp_tmit_chunk *tp1;
6881 for (i = 0; i < bundle_at; i++) {
6882 /* off of the send queue */
6883 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6884 asoc->send_queue_cnt--;
6887 * Any chunk NOT 0 you zap the time chunk 0 gets
6888 * zapped or set based on if a RTO measurment is
6891 data_list[i]->do_rtt = 0;
6894 data_list[i]->sent_rcv_time = net->last_sent_time;
6895 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6896 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6897 if (data_list[i]->whoTo == NULL) {
6898 data_list[i]->whoTo = net;
6899 atomic_add_int(&net->ref_count, 1);
6901 /* on to the sent queue */
6902 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6903 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6904 struct sctp_tmit_chunk *tpp;
6906 /* need to move back */
6908 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6910 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6914 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6917 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6919 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6924 /* This does not lower until the cum-ack passes it */
6925 asoc->sent_queue_cnt++;
6926 if ((asoc->peers_rwnd <= 0) &&
6927 (asoc->total_flight == 0) &&
6929 /* Mark the chunk as being a window probe */
6930 SCTP_STAT_INCR(sctps_windowprobed);
6932 #ifdef SCTP_AUDITING_ENABLED
6933 sctp_audit_log(0xC2, 3);
6935 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6936 data_list[i]->snd_count = 1;
6937 data_list[i]->rec.data.chunk_was_revoked = 0;
6938 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6939 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6940 data_list[i]->whoTo->flight_size,
6941 data_list[i]->book_size,
6942 (uintptr_t) data_list[i]->whoTo,
6943 data_list[i]->rec.data.TSN_seq);
6945 sctp_flight_size_increase(data_list[i]);
6946 sctp_total_flight_increase(stcb, data_list[i]);
6947 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6948 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6949 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6951 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6952 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6953 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6954 /* SWS sender side engages */
6955 asoc->peers_rwnd = 0;
6958 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6959 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
6964 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
6965 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6970 struct sctp_tmit_chunk *chk, *nchk;
6972 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6973 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
6974 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
6975 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
6976 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
6977 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
6978 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
6979 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
6980 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
6981 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
6982 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
6983 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
6984 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
6985 /* Stray chunks must be cleaned up */
6987 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6989 sctp_m_freem(chk->data);
6992 asoc->ctrl_queue_cnt--;
6993 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
6994 asoc->fwd_tsn_cnt--;
6995 sctp_free_a_chunk(stcb, chk, so_locked);
6996 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
6997 /* special handling, we must look into the param */
6998 if (chk != asoc->str_reset) {
6999 goto clean_up_anyway;
7007 sctp_can_we_split_this(struct sctp_tcb *stcb,
7009 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7012 * Make a decision on if I should split a msg into multiple parts.
7013 * This is only asked of incomplete messages.
7017 * If we are doing EEOR we need to always send it if its the
7018 * entire thing, since it might be all the guy is putting in
7021 if (goal_mtu >= length) {
7023 * If we have data outstanding,
7024 * we get another chance when the sack
7025 * arrives to transmit - wait for more data
7027 if (stcb->asoc.total_flight == 0) {
7029 * If nothing is in flight, we zero the
7037 /* You can fill the rest */
7042 * For those strange folk that make the send buffer
7043 * smaller than our fragmentation point, we can't
7044 * get a full msg in so we have to allow splitting.
7046 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7049 if ((length <= goal_mtu) ||
7050 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7051 /* Sub-optimial residual don't split in non-eeor mode. */
7055 * If we reach here length is larger than the goal_mtu. Do we wish
7056 * to split it for the sake of packet putting together?
7058 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7059 /* Its ok to split it */
7060 return (min(goal_mtu, frag_point));
7062 /* Nope, can't split */
7068 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7069 struct sctp_stream_out *strq,
7071 uint32_t frag_point,
7077 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7082 /* Move from the stream to the send_queue keeping track of the total */
7083 struct sctp_association *asoc;
7084 struct sctp_stream_queue_pending *sp;
7085 struct sctp_tmit_chunk *chk;
7086 struct sctp_data_chunk *dchkh;
7087 uint32_t to_move, length;
7088 uint8_t rcv_flags = 0;
7090 uint8_t send_lock_up = 0;
7092 SCTP_TCB_LOCK_ASSERT(stcb);
7095 /* sa_ignore FREED_MEMORY */
7096 sp = TAILQ_FIRST(&strq->outqueue);
7099 if (send_lock_up == 0) {
7100 SCTP_TCB_SEND_LOCK(stcb);
7103 sp = TAILQ_FIRST(&strq->outqueue);
7107 if (strq->last_msg_incomplete) {
7108 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7110 strq->last_msg_incomplete);
7111 strq->last_msg_incomplete = 0;
7115 SCTP_TCB_SEND_UNLOCK(stcb);
7120 if ((sp->msg_is_complete) && (sp->length == 0)) {
7121 if (sp->sender_all_done) {
7123 * We are doing differed cleanup. Last time through
7124 * when we took all the data the sender_all_done was
7127 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7128 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7129 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7130 sp->sender_all_done,
7132 sp->msg_is_complete,
7136 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7137 SCTP_TCB_SEND_LOCK(stcb);
7140 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7141 TAILQ_REMOVE(&strq->outqueue, sp, next);
7142 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7144 sctp_free_remote_addr(sp->net);
7148 sctp_m_freem(sp->data);
7151 sctp_free_a_strmoq(stcb, sp, so_locked);
7152 /* we can't be locked to it */
7154 stcb->asoc.locked_on_sending = NULL;
7156 SCTP_TCB_SEND_UNLOCK(stcb);
7159 /* back to get the next msg */
7163 * sender just finished this but still holds a
7172 /* is there some to get */
7173 if (sp->length == 0) {
7179 } else if (sp->discard_rest) {
7180 if (send_lock_up == 0) {
7181 SCTP_TCB_SEND_LOCK(stcb);
7184 /* Whack down the size */
7185 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7186 if ((stcb->sctp_socket != NULL) && \
7187 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7188 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7189 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7192 sctp_m_freem(sp->data);
7194 sp->tail_mbuf = NULL;
7204 some_taken = sp->some_taken;
7205 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7206 sp->msg_is_complete = 1;
7209 length = sp->length;
7210 if (sp->msg_is_complete) {
7211 /* The message is complete */
7212 to_move = min(length, frag_point);
7213 if (to_move == length) {
7214 /* All of it fits in the MTU */
7215 if (sp->some_taken) {
7216 rcv_flags |= SCTP_DATA_LAST_FRAG;
7217 sp->put_last_out = 1;
7219 rcv_flags |= SCTP_DATA_NOT_FRAG;
7220 sp->put_last_out = 1;
7223 /* Not all of it fits, we fragment */
7224 if (sp->some_taken == 0) {
7225 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7230 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7233 * We use a snapshot of length in case it
7234 * is expanding during the compare.
7239 if (to_move >= llen) {
7241 if (send_lock_up == 0) {
7243 * We are taking all of an incomplete msg
7244 * thus we need a send lock.
7246 SCTP_TCB_SEND_LOCK(stcb);
7248 if (sp->msg_is_complete) {
7250 * the sender finished the
7257 if (sp->some_taken == 0) {
7258 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7262 /* Nothing to take. */
7263 if (sp->some_taken) {
7272 /* If we reach here, we can copy out a chunk */
7273 sctp_alloc_a_chunk(stcb, chk);
7275 /* No chunk memory */
7281 * Setup for unordered if needed by looking at the user sent info
7284 if (sp->sinfo_flags & SCTP_UNORDERED) {
7285 rcv_flags |= SCTP_DATA_UNORDERED;
7287 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7288 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7289 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7291 /* clear out the chunk before setting up */
7292 memset(chk, 0, sizeof(*chk));
7293 chk->rec.data.rcv_flags = rcv_flags;
7295 if (to_move >= length) {
7296 /* we think we can steal the whole thing */
7297 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7298 SCTP_TCB_SEND_LOCK(stcb);
7301 if (to_move < sp->length) {
7302 /* bail, it changed */
7305 chk->data = sp->data;
7306 chk->last_mbuf = sp->tail_mbuf;
7307 /* register the stealing */
7308 sp->data = sp->tail_mbuf = NULL;
7313 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_DONTWAIT);
7314 chk->last_mbuf = NULL;
7315 if (chk->data == NULL) {
7316 sp->some_taken = some_taken;
7317 sctp_free_a_chunk(stcb, chk, so_locked);
7322 #ifdef SCTP_MBUF_LOGGING
7323 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7326 for (mat = chk->data; mat; mat = SCTP_BUF_NEXT(mat)) {
7327 if (SCTP_BUF_IS_EXTENDED(mat)) {
7328 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
7333 /* Pull off the data */
7334 m_adj(sp->data, to_move);
7335 /* Now lets work our way down and compact it */
7337 while (m && (SCTP_BUF_LEN(m) == 0)) {
7338 sp->data = SCTP_BUF_NEXT(m);
7339 SCTP_BUF_NEXT(m) = NULL;
7340 if (sp->tail_mbuf == m) {
7342 * Freeing tail? TSNH since
7343 * we supposedly were taking less
7344 * than the sp->length.
7347 panic("Huh, freing tail? - TSNH");
7349 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7350 sp->tail_mbuf = sp->data = NULL;
7359 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7360 chk->copy_by_ref = 1;
7362 chk->copy_by_ref = 0;
7365 * get last_mbuf and counts of mb useage This is ugly but hopefully
7366 * its only one mbuf.
7368 if (chk->last_mbuf == NULL) {
7369 chk->last_mbuf = chk->data;
7370 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7371 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7374 if (to_move > length) {
7375 /*- This should not happen either
7376 * since we always lower to_move to the size
7377 * of sp->length if its larger.
7380 panic("Huh, how can to_move be larger?");
7382 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7386 atomic_subtract_int(&sp->length, to_move);
7388 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7389 /* Not enough room for a chunk header, get some */
7392 m = sctp_get_mbuf_for_msg(1, 0, M_DONTWAIT, 0, MT_DATA);
7395 * we're in trouble here. _PREPEND below will free
7396 * all the data if there is no leading space, so we
7397 * must put the data back and restore.
7399 if (send_lock_up == 0) {
7400 SCTP_TCB_SEND_LOCK(stcb);
7403 if (chk->data == NULL) {
7404 /* unsteal the data */
7405 sp->data = chk->data;
7406 sp->tail_mbuf = chk->last_mbuf;
7410 /* reassemble the data */
7412 sp->data = chk->data;
7413 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7415 sp->some_taken = some_taken;
7416 atomic_add_int(&sp->length, to_move);
7419 sctp_free_a_chunk(stcb, chk, so_locked);
7423 SCTP_BUF_LEN(m) = 0;
7424 SCTP_BUF_NEXT(m) = chk->data;
7426 M_ALIGN(chk->data, 4);
7429 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT);
7430 if (chk->data == NULL) {
7431 /* HELP, TSNH since we assured it would not above? */
7433 panic("prepend failes HELP?");
7435 SCTP_PRINTF("prepend fails HELP?\n");
7436 sctp_free_a_chunk(stcb, chk, so_locked);
7442 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7443 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7444 chk->book_size_scale = 0;
7445 chk->sent = SCTP_DATAGRAM_UNSENT;
7448 chk->asoc = &stcb->asoc;
7449 chk->pad_inplace = 0;
7450 chk->no_fr_allowed = 0;
7451 chk->rec.data.stream_seq = sp->strseq;
7452 chk->rec.data.stream_number = sp->stream;
7453 chk->rec.data.payloadtype = sp->ppid;
7454 chk->rec.data.context = sp->context;
7455 chk->rec.data.doing_fast_retransmit = 0;
7457 chk->rec.data.timetodrop = sp->ts;
7458 chk->flags = sp->act_flags;
7461 chk->whoTo = sp->net;
7462 atomic_add_int(&chk->whoTo->ref_count, 1);
7466 if (sp->holds_key_ref) {
7467 chk->auth_keyid = sp->auth_keyid;
7468 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7469 chk->holds_key_ref = 1;
7471 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7472 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7473 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7474 (uintptr_t) stcb, sp->length,
7475 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7476 chk->rec.data.TSN_seq);
7478 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7480 * Put the rest of the things in place now. Size was done earlier in
7481 * previous loop prior to padding.
7484 #ifdef SCTP_ASOCLOG_OF_TSNS
7485 SCTP_TCB_LOCK_ASSERT(stcb);
7486 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7487 asoc->tsn_out_at = 0;
7488 asoc->tsn_out_wrapped = 1;
7490 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7491 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7492 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7493 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7494 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7495 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7496 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7497 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7501 dchkh->ch.chunk_type = SCTP_DATA;
7502 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7503 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7504 dchkh->dp.stream_id = htons(strq->stream_no);
7505 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7506 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7507 dchkh->ch.chunk_length = htons(chk->send_size);
7508 /* Now advance the chk->send_size by the actual pad needed. */
7509 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7514 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7515 if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) {
7516 chk->pad_inplace = 1;
7518 if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) {
7519 /* pad added an mbuf */
7520 chk->last_mbuf = lm;
7522 chk->send_size += pads;
7524 /* We only re-set the policy if it is on */
7525 if (sp->pr_sctp_on) {
7526 sctp_set_prsctp_policy(sp);
7527 asoc->pr_sctp_cnt++;
7528 chk->pr_sctp_on = 1;
7530 chk->pr_sctp_on = 0;
7532 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7533 /* All done pull and kill the message */
7534 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7535 if (sp->put_last_out == 0) {
7536 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7537 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7538 sp->sender_all_done,
7540 sp->msg_is_complete,
7544 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7545 SCTP_TCB_SEND_LOCK(stcb);
7548 TAILQ_REMOVE(&strq->outqueue, sp, next);
7549 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7551 sctp_free_remote_addr(sp->net);
7555 sctp_m_freem(sp->data);
7558 sctp_free_a_strmoq(stcb, sp, so_locked);
7560 /* we can't be locked to it */
7562 stcb->asoc.locked_on_sending = NULL;
7564 /* more to go, we are locked */
7567 asoc->chunks_on_out_queue++;
7568 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7569 asoc->send_queue_cnt++;
7572 SCTP_TCB_SEND_UNLOCK(stcb);
7579 sctp_fill_outqueue(struct sctp_tcb *stcb,
7580 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7581 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7586 struct sctp_association *asoc;
7587 struct sctp_stream_out *strq;
7588 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7591 SCTP_TCB_LOCK_ASSERT(stcb);
7593 switch (net->ro._l_addr.sa.sa_family) {
7596 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7601 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7606 goal_mtu = net->mtu;
7609 /* Need an allowance for the data chunk header too */
7610 goal_mtu -= sizeof(struct sctp_data_chunk);
7612 /* must make even word boundary */
7613 goal_mtu &= 0xfffffffc;
7614 if (asoc->locked_on_sending) {
7615 /* We are stuck on one stream until the message completes. */
7616 strq = asoc->locked_on_sending;
7619 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7622 while ((goal_mtu > 0) && strq) {
7625 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7626 &giveup, eeor_mode, &bail, so_locked);
7628 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7631 asoc->locked_on_sending = strq;
7632 if ((moved_how_much == 0) || (giveup) || bail)
7633 /* no more to move for now */
7636 asoc->locked_on_sending = NULL;
7637 if ((giveup) || bail) {
7640 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7645 total_moved += moved_how_much;
7646 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7647 goal_mtu &= 0xfffffffc;
7652 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7654 if (total_moved == 0) {
7655 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7656 (net == stcb->asoc.primary_destination)) {
7657 /* ran dry for primary network net */
7658 SCTP_STAT_INCR(sctps_primary_randry);
7659 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7660 /* ran dry with CMT on */
7661 SCTP_STAT_INCR(sctps_cmt_randry);
7667 sctp_fix_ecn_echo(struct sctp_association *asoc)
7669 struct sctp_tmit_chunk *chk;
7671 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7672 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7673 chk->sent = SCTP_DATAGRAM_UNSENT;
7679 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7681 struct sctp_association *asoc;
7682 struct sctp_tmit_chunk *chk;
7683 struct sctp_stream_queue_pending *sp;
7690 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7691 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7692 if (sp->net == net) {
7693 sctp_free_remote_addr(sp->net);
7698 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7699 if (chk->whoTo == net) {
7700 sctp_free_remote_addr(chk->whoTo);
7707 sctp_med_chunk_output(struct sctp_inpcb *inp,
7708 struct sctp_tcb *stcb,
7709 struct sctp_association *asoc,
7712 int control_only, int from_where,
7713 struct timeval *now, int *now_filled, int frag_point, int so_locked
7714 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7720 * Ok this is the generic chunk service queue. we must do the
7721 * following: - Service the stream queue that is next, moving any
7722 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7723 * LAST to the out queue in one pass) and assigning TSN's - Check to
7724 * see if the cwnd/rwnd allows any output, if so we go ahead and
7725 * fomulate and send the low level chunks. Making sure to combine
7726 * any control in the control chunk queue also.
7728 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7729 struct mbuf *outchain, *endoutchain;
7730 struct sctp_tmit_chunk *chk, *nchk;
7732 /* temp arrays for unlinking */
7733 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7734 int no_fragmentflg, error;
7735 unsigned int max_rwnd_per_dest, max_send_per_dest;
7736 int one_chunk, hbflag, skip_data_for_this_net;
7737 int asconf, cookie, no_out_cnt;
7738 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7739 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7741 uint32_t auth_offset = 0;
7742 struct sctp_auth_chunk *auth = NULL;
7743 uint16_t auth_keyid;
7744 int override_ok = 1;
7745 int skip_fill_up = 0;
7746 int data_auth_reqd = 0;
7749 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7755 auth_keyid = stcb->asoc.authinfo.active_keyid;
7757 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7758 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7759 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7764 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7766 * First lets prime the pump. For each destination, if there is room
7767 * in the flight size, attempt to pull an MTU's worth out of the
7768 * stream queues into the general send_queue
7770 #ifdef SCTP_AUDITING_ENABLED
7771 sctp_audit_log(0xC2, 2);
7773 SCTP_TCB_LOCK_ASSERT(stcb);
7775 if ((control_only) || (asoc->stream_reset_outstanding))
7780 /* Nothing to possible to send? */
7781 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7782 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7783 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7784 TAILQ_EMPTY(&asoc->send_queue) &&
7785 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7790 if (asoc->peers_rwnd == 0) {
7791 /* No room in peers rwnd */
7793 if (asoc->total_flight > 0) {
7794 /* we are allowed one chunk in flight */
7798 if (stcb->asoc.ecn_echo_cnt_onq) {
7799 /* Record where a sack goes, if any */
7800 if (no_data_chunks &&
7801 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7802 /* Nothing but ECNe to send - we don't do that */
7803 goto nothing_to_send;
7805 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7806 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7807 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7808 sack_goes_to = chk->whoTo;
7813 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7814 if (stcb->sctp_socket)
7815 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7817 max_send_per_dest = 0;
7818 if (no_data_chunks == 0) {
7819 /* How many non-directed chunks are there? */
7820 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7821 if (chk->whoTo == NULL) {
7823 * We already have non-directed chunks on
7824 * the queue, no need to do a fill-up.
7832 if ((no_data_chunks == 0) &&
7833 (skip_fill_up == 0) &&
7834 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7835 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7837 * This for loop we are in takes in each net, if
7838 * its's got space in cwnd and has data sent to it
7839 * (when CMT is off) then it calls
7840 * sctp_fill_outqueue for the net. This gets data on
7841 * the send queue for that network.
7843 * In sctp_fill_outqueue TSN's are assigned and data is
7844 * copied out of the stream buffers. Note mostly
7845 * copy by reference (we hope).
7847 net->window_probe = 0;
7848 if ((net != stcb->asoc.alternate) &&
7849 ((net->dest_state & SCTP_ADDR_PF) ||
7850 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7851 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7852 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7853 sctp_log_cwnd(stcb, net, 1,
7854 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7858 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7859 (net->flight_size == 0)) {
7860 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7862 if (net->flight_size >= net->cwnd) {
7863 /* skip this network, no room - can't fill */
7864 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7865 sctp_log_cwnd(stcb, net, 3,
7866 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7870 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7871 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7873 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7875 /* memory alloc failure */
7881 /* now service each destination and send out what we can for it */
7882 /* Nothing to send? */
7883 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7884 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7885 TAILQ_EMPTY(&asoc->send_queue)) {
7889 if (asoc->sctp_cmt_on_off > 0) {
7890 /* get the last start point */
7891 start_at = asoc->last_net_cmt_send_started;
7892 if (start_at == NULL) {
7893 /* null so to beginning */
7894 start_at = TAILQ_FIRST(&asoc->nets);
7896 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7897 if (start_at == NULL) {
7898 start_at = TAILQ_FIRST(&asoc->nets);
7901 asoc->last_net_cmt_send_started = start_at;
7903 start_at = TAILQ_FIRST(&asoc->nets);
7905 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7906 if (chk->whoTo == NULL) {
7907 if (asoc->alternate) {
7908 chk->whoTo = asoc->alternate;
7910 chk->whoTo = asoc->primary_destination;
7912 atomic_add_int(&chk->whoTo->ref_count, 1);
7915 old_start_at = NULL;
7916 again_one_more_time:
7917 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7918 /* how much can we send? */
7919 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7920 if (old_start_at && (old_start_at == net)) {
7921 /* through list ocmpletely. */
7925 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7926 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7927 (net->flight_size >= net->cwnd)) {
7929 * Nothing on control or asconf and flight is full,
7930 * we can skip even in the CMT case.
7935 endoutchain = outchain = NULL;
7938 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7939 skip_data_for_this_net = 1;
7941 skip_data_for_this_net = 0;
7943 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7945 * if we have a route and an ifp check to see if we
7946 * have room to send to this guy
7950 ifp = net->ro.ro_rt->rt_ifp;
7951 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
7952 SCTP_STAT_INCR(sctps_ifnomemqueued);
7953 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
7954 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
7959 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7962 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
7967 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
7977 if (mtu > asoc->peers_rwnd) {
7978 if (asoc->total_flight > 0) {
7979 /* We have a packet in flight somewhere */
7980 r_mtu = asoc->peers_rwnd;
7982 /* We are always allowed to send one MTU out */
7989 /************************/
7990 /* ASCONF transmission */
7991 /************************/
7992 /* Now first lets go through the asconf queue */
7993 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
7994 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
7997 if (chk->whoTo == NULL) {
7998 if (asoc->alternate == NULL) {
7999 if (asoc->primary_destination != net) {
8003 if (asoc->alternate != net) {
8008 if (chk->whoTo != net) {
8012 if (chk->data == NULL) {
8015 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8016 chk->sent != SCTP_DATAGRAM_RESEND) {
8020 * if no AUTH is yet included and this chunk
8021 * requires it, make sure to account for it. We
8022 * don't apply the size until the AUTH chunk is
8023 * actually added below in case there is no room for
8024 * this chunk. NOTE: we overload the use of "omtu"
8027 if ((auth == NULL) &&
8028 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8029 stcb->asoc.peer_auth_chunks)) {
8030 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8033 /* Here we do NOT factor the r_mtu */
8034 if ((chk->send_size < (int)(mtu - omtu)) ||
8035 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8037 * We probably should glom the mbuf chain
8038 * from the chk->data for control but the
8039 * problem is it becomes yet one more level
8040 * of tracking to do if for some reason
8041 * output fails. Then I have got to
8042 * reconstruct the merged control chain.. el
8043 * yucko.. for now we take the easy way and
8047 * Add an AUTH chunk, if chunk requires it
8048 * save the offset into the chain for AUTH
8050 if ((auth == NULL) &&
8051 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8052 stcb->asoc.peer_auth_chunks))) {
8053 outchain = sctp_add_auth_chunk(outchain,
8058 chk->rec.chunk_id.id);
8059 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8061 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8062 (int)chk->rec.chunk_id.can_take_data,
8063 chk->send_size, chk->copy_by_ref);
8064 if (outchain == NULL) {
8066 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8069 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8070 /* update our MTU size */
8071 if (mtu > (chk->send_size + omtu))
8072 mtu -= (chk->send_size + omtu);
8075 to_out += (chk->send_size + omtu);
8076 /* Do clear IP_DF ? */
8077 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8080 if (chk->rec.chunk_id.can_take_data)
8083 * set hb flag since we can use these for
8089 * should sysctl this: don't bundle data
8090 * with ASCONF since it requires AUTH
8093 chk->sent = SCTP_DATAGRAM_SENT;
8094 if (chk->whoTo == NULL) {
8096 atomic_add_int(&net->ref_count, 1);
8101 * Ok we are out of room but we can
8102 * output without effecting the
8103 * flight size since this little guy
8104 * is a control only packet.
8106 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8108 * do NOT clear the asconf flag as
8109 * it is used to do appropriate
8110 * source address selection.
8112 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8113 (struct sockaddr *)&net->ro._l_addr,
8114 outchain, auth_offset, auth,
8115 stcb->asoc.authinfo.active_keyid,
8116 no_fragmentflg, 0, asconf,
8117 inp->sctp_lport, stcb->rport,
8118 htonl(stcb->asoc.peer_vtag),
8119 net->port, so_locked, NULL, NULL))) {
8120 if (error == ENOBUFS) {
8121 asoc->ifp_had_enobuf = 1;
8122 SCTP_STAT_INCR(sctps_lowlevelerr);
8124 if (from_where == 0) {
8125 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8127 if (*now_filled == 0) {
8128 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8130 *now = net->last_sent_time;
8132 net->last_sent_time = *now;
8135 /* error, could not output */
8136 if (error == EHOSTUNREACH) {
8142 sctp_move_chunks_from_net(stcb, net);
8147 asoc->ifp_had_enobuf = 0;
8148 if (*now_filled == 0) {
8149 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8151 *now = net->last_sent_time;
8153 net->last_sent_time = *now;
8157 * increase the number we sent, if a
8158 * cookie is sent we don't tell them
8161 outchain = endoutchain = NULL;
8165 *num_out += ctl_cnt;
8166 /* recalc a clean slate and setup */
8167 switch (net->ro._l_addr.sa.sa_family) {
8170 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8175 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8188 /************************/
8189 /* Control transmission */
8190 /************************/
8191 /* Now first lets go through the control queue */
8192 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8193 if ((sack_goes_to) &&
8194 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8195 (chk->whoTo != sack_goes_to)) {
8197 * if we have a sack in queue, and we are
8198 * looking at an ecn echo that is NOT queued
8199 * to where the sack is going..
8201 if (chk->whoTo == net) {
8203 * Don't transmit it to where its
8204 * going (current net)
8207 } else if (sack_goes_to == net) {
8209 * But do transmit it to this
8212 goto skip_net_check;
8215 if (chk->whoTo == NULL) {
8216 if (asoc->alternate == NULL) {
8217 if (asoc->primary_destination != net) {
8221 if (asoc->alternate != net) {
8226 if (chk->whoTo != net) {
8231 if (chk->data == NULL) {
8234 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8236 * It must be unsent. Cookies and ASCONF's
8237 * hang around but there timers will force
8238 * when marked for resend.
8243 * if no AUTH is yet included and this chunk
8244 * requires it, make sure to account for it. We
8245 * don't apply the size until the AUTH chunk is
8246 * actually added below in case there is no room for
8247 * this chunk. NOTE: we overload the use of "omtu"
8250 if ((auth == NULL) &&
8251 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8252 stcb->asoc.peer_auth_chunks)) {
8253 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8256 /* Here we do NOT factor the r_mtu */
8257 if ((chk->send_size <= (int)(mtu - omtu)) ||
8258 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8260 * We probably should glom the mbuf chain
8261 * from the chk->data for control but the
8262 * problem is it becomes yet one more level
8263 * of tracking to do if for some reason
8264 * output fails. Then I have got to
8265 * reconstruct the merged control chain.. el
8266 * yucko.. for now we take the easy way and
8270 * Add an AUTH chunk, if chunk requires it
8271 * save the offset into the chain for AUTH
8273 if ((auth == NULL) &&
8274 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8275 stcb->asoc.peer_auth_chunks))) {
8276 outchain = sctp_add_auth_chunk(outchain,
8281 chk->rec.chunk_id.id);
8282 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8284 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8285 (int)chk->rec.chunk_id.can_take_data,
8286 chk->send_size, chk->copy_by_ref);
8287 if (outchain == NULL) {
8289 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8292 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8293 /* update our MTU size */
8294 if (mtu > (chk->send_size + omtu))
8295 mtu -= (chk->send_size + omtu);
8298 to_out += (chk->send_size + omtu);
8299 /* Do clear IP_DF ? */
8300 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8303 if (chk->rec.chunk_id.can_take_data)
8305 /* Mark things to be removed, if needed */
8306 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8307 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8308 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8309 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8310 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8311 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8312 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8313 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8314 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8315 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8316 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8317 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8320 /* remove these chunks at the end */
8321 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8322 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8323 /* turn off the timer */
8324 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8325 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8326 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8332 * Other chunks, since they have
8333 * timers running (i.e. COOKIE) we
8334 * just "trust" that it gets sent or
8338 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8341 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8343 * Increment ecne send count
8344 * here this means we may be
8345 * over-zealous in our
8346 * counting if the send
8347 * fails, but its the best
8348 * place to do it (we used
8349 * to do it in the queue of
8350 * the chunk, but that did
8351 * not tell how many times
8354 SCTP_STAT_INCR(sctps_sendecne);
8356 chk->sent = SCTP_DATAGRAM_SENT;
8357 if (chk->whoTo == NULL) {
8359 atomic_add_int(&net->ref_count, 1);
8365 * Ok we are out of room but we can
8366 * output without effecting the
8367 * flight size since this little guy
8368 * is a control only packet.
8371 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8373 * do NOT clear the asconf
8374 * flag as it is used to do
8375 * appropriate source
8376 * address selection.
8380 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8383 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8384 (struct sockaddr *)&net->ro._l_addr,
8387 stcb->asoc.authinfo.active_keyid,
8388 no_fragmentflg, 0, asconf,
8389 inp->sctp_lport, stcb->rport,
8390 htonl(stcb->asoc.peer_vtag),
8391 net->port, so_locked, NULL, NULL))) {
8392 if (error == ENOBUFS) {
8393 asoc->ifp_had_enobuf = 1;
8394 SCTP_STAT_INCR(sctps_lowlevelerr);
8396 if (from_where == 0) {
8397 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8399 /* error, could not output */
8401 if (*now_filled == 0) {
8402 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8404 *now = net->last_sent_time;
8406 net->last_sent_time = *now;
8410 if (error == EHOSTUNREACH) {
8416 sctp_move_chunks_from_net(stcb, net);
8421 asoc->ifp_had_enobuf = 0;
8422 /* Only HB or ASCONF advances time */
8424 if (*now_filled == 0) {
8425 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8427 *now = net->last_sent_time;
8429 net->last_sent_time = *now;
8434 * increase the number we sent, if a
8435 * cookie is sent we don't tell them
8438 outchain = endoutchain = NULL;
8442 *num_out += ctl_cnt;
8443 /* recalc a clean slate and setup */
8444 switch (net->ro._l_addr.sa.sa_family) {
8447 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8452 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8465 /* JRI: if dest is in PF state, do not send data to it */
8466 if ((asoc->sctp_cmt_on_off > 0) &&
8467 (net != stcb->asoc.alternate) &&
8468 (net->dest_state & SCTP_ADDR_PF)) {
8471 if (net->flight_size >= net->cwnd) {
8474 if ((asoc->sctp_cmt_on_off > 0) &&
8475 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8476 (net->flight_size > max_rwnd_per_dest)) {
8480 * We need a specific accounting for the usage of the send
8481 * buffer. We also need to check the number of messages per
8482 * net. For now, this is better than nothing and it disabled
8485 if ((asoc->sctp_cmt_on_off > 0) &&
8486 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8487 (max_send_per_dest > 0) &&
8488 (net->flight_size > max_send_per_dest)) {
8491 /*********************/
8492 /* Data transmission */
8493 /*********************/
8495 * if AUTH for DATA is required and no AUTH has been added
8496 * yet, account for this in the mtu now... if no data can be
8497 * bundled, this adjustment won't matter anyways since the
8498 * packet will be going out...
8500 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8501 stcb->asoc.peer_auth_chunks);
8502 if (data_auth_reqd && (auth == NULL)) {
8503 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8505 /* now lets add any data within the MTU constraints */
8506 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8508 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8509 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8515 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8516 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8526 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8527 (skip_data_for_this_net == 0)) ||
8529 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8530 if (no_data_chunks) {
8531 /* let only control go out */
8535 if (net->flight_size >= net->cwnd) {
8536 /* skip this net, no room for data */
8540 if ((chk->whoTo != NULL) &&
8541 (chk->whoTo != net)) {
8542 /* Don't send the chunk on this net */
8545 if (asoc->sctp_cmt_on_off == 0) {
8546 if ((asoc->alternate) &&
8547 (asoc->alternate != net) &&
8548 (chk->whoTo == NULL)) {
8550 } else if ((net != asoc->primary_destination) &&
8551 (asoc->alternate == NULL) &&
8552 (chk->whoTo == NULL)) {
8556 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8558 * strange, we have a chunk that is
8559 * to big for its destination and
8560 * yet no fragment ok flag.
8561 * Something went wrong when the
8562 * PMTU changed...we did not mark
8563 * this chunk for some reason?? I
8564 * will fix it here by letting IP
8565 * fragment it for now and printing
8566 * a warning. This really should not
8569 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8570 chk->send_size, mtu);
8571 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8573 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8574 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8575 struct sctp_data_chunk *dchkh;
8577 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8578 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8580 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8581 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8582 /* ok we will add this one */
8585 * Add an AUTH chunk, if chunk
8586 * requires it, save the offset into
8587 * the chain for AUTH
8589 if (data_auth_reqd) {
8591 outchain = sctp_add_auth_chunk(outchain,
8597 auth_keyid = chk->auth_keyid;
8599 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8600 } else if (override_ok) {
8605 auth_keyid = chk->auth_keyid;
8607 } else if (auth_keyid != chk->auth_keyid) {
8615 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8616 chk->send_size, chk->copy_by_ref);
8617 if (outchain == NULL) {
8618 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8619 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8620 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8623 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8626 /* upate our MTU size */
8627 /* Do clear IP_DF ? */
8628 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8631 /* unsigned subtraction of mtu */
8632 if (mtu > chk->send_size)
8633 mtu -= chk->send_size;
8636 /* unsigned subtraction of r_mtu */
8637 if (r_mtu > chk->send_size)
8638 r_mtu -= chk->send_size;
8642 to_out += chk->send_size;
8643 if ((to_out > mx_mtu) && no_fragmentflg) {
8645 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8647 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8651 chk->window_probe = 0;
8652 data_list[bundle_at++] = chk;
8653 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8656 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8657 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8658 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8660 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8662 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8663 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8673 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8675 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8676 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8677 data_list[0]->window_probe = 1;
8678 net->window_probe = 1;
8684 * Must be sent in order of the
8685 * TSN's (on a network)
8689 } /* for (chunk gather loop for this net) */
8690 } /* if asoc.state OPEN */
8692 /* Is there something to send for this destination? */
8694 /* We may need to start a control timer or two */
8696 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8699 * do NOT clear the asconf flag as it is
8700 * used to do appropriate source address
8705 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8708 /* must start a send timer if data is being sent */
8709 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8711 * no timer running on this destination
8714 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8716 /* Now send it, if there is anything to send :> */
8717 if ((error = sctp_lowlevel_chunk_output(inp,
8720 (struct sockaddr *)&net->ro._l_addr,
8728 inp->sctp_lport, stcb->rport,
8729 htonl(stcb->asoc.peer_vtag),
8730 net->port, so_locked, NULL, NULL))) {
8731 /* error, we could not output */
8732 if (error == ENOBUFS) {
8733 SCTP_STAT_INCR(sctps_lowlevelerr);
8734 asoc->ifp_had_enobuf = 1;
8736 if (from_where == 0) {
8737 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8739 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8741 if (*now_filled == 0) {
8742 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8744 *now = net->last_sent_time;
8746 net->last_sent_time = *now;
8750 if (error == EHOSTUNREACH) {
8752 * Destination went unreachable
8755 sctp_move_chunks_from_net(stcb, net);
8759 * I add this line to be paranoid. As far as
8760 * I can tell the continue, takes us back to
8761 * the top of the for, but just to make sure
8762 * I will reset these again here.
8764 ctl_cnt = bundle_at = 0;
8765 continue; /* This takes us back to the
8766 * for() for the nets. */
8768 asoc->ifp_had_enobuf = 0;
8773 if (bundle_at || hbflag) {
8774 /* For data/asconf and hb set time */
8775 if (*now_filled == 0) {
8776 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8778 *now = net->last_sent_time;
8780 net->last_sent_time = *now;
8784 *num_out += (ctl_cnt + bundle_at);
8787 /* setup for a RTO measurement */
8788 tsns_sent = data_list[0]->rec.data.TSN_seq;
8789 /* fill time if not already filled */
8790 if (*now_filled == 0) {
8791 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8793 *now = asoc->time_last_sent;
8795 asoc->time_last_sent = *now;
8797 if (net->rto_needed) {
8798 data_list[0]->do_rtt = 1;
8799 net->rto_needed = 0;
8801 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8802 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8808 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8809 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8812 if (old_start_at == NULL) {
8813 old_start_at = start_at;
8814 start_at = TAILQ_FIRST(&asoc->nets);
8816 goto again_one_more_time;
8819 * At the end there should be no NON timed chunks hanging on this
8822 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8823 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8825 if ((*num_out == 0) && (*reason_code == 0)) {
8830 sctp_clean_up_ctl(stcb, asoc, so_locked);
8835 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8838 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8839 * the control chunk queue.
8841 struct sctp_chunkhdr *hdr;
8842 struct sctp_tmit_chunk *chk;
8845 SCTP_TCB_LOCK_ASSERT(stcb);
8846 sctp_alloc_a_chunk(stcb, chk);
8849 sctp_m_freem(op_err);
8852 chk->copy_by_ref = 0;
8853 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT);
8854 if (op_err == NULL) {
8855 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8860 while (mat != NULL) {
8861 chk->send_size += SCTP_BUF_LEN(mat);
8862 mat = SCTP_BUF_NEXT(mat);
8864 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8865 chk->rec.chunk_id.can_take_data = 1;
8866 chk->sent = SCTP_DATAGRAM_UNSENT;
8869 chk->asoc = &stcb->asoc;
8872 hdr = mtod(op_err, struct sctp_chunkhdr *);
8873 hdr->chunk_type = SCTP_OPERATION_ERROR;
8874 hdr->chunk_flags = 0;
8875 hdr->chunk_length = htons(chk->send_size);
8876 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8879 chk->asoc->ctrl_queue_cnt++;
8883 sctp_send_cookie_echo(struct mbuf *m,
8885 struct sctp_tcb *stcb,
8886 struct sctp_nets *net)
8889 * pull out the cookie and put it at the front of the control chunk
8893 struct mbuf *cookie;
8894 struct sctp_paramhdr parm, *phdr;
8895 struct sctp_chunkhdr *hdr;
8896 struct sctp_tmit_chunk *chk;
8897 uint16_t ptype, plen;
8899 /* First find the cookie in the param area */
8901 at = offset + sizeof(struct sctp_init_chunk);
8903 SCTP_TCB_LOCK_ASSERT(stcb);
8905 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8909 ptype = ntohs(phdr->param_type);
8910 plen = ntohs(phdr->param_length);
8911 if (ptype == SCTP_STATE_COOKIE) {
8914 /* found the cookie */
8915 if ((pad = (plen % 4))) {
8918 cookie = SCTP_M_COPYM(m, at, plen, M_DONTWAIT);
8919 if (cookie == NULL) {
8923 #ifdef SCTP_MBUF_LOGGING
8924 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8927 for (mat = cookie; mat; mat = SCTP_BUF_NEXT(mat)) {
8928 if (SCTP_BUF_IS_EXTENDED(mat)) {
8929 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8936 at += SCTP_SIZE32(plen);
8938 if (cookie == NULL) {
8939 /* Did not find the cookie */
8942 /* ok, we got the cookie lets change it into a cookie echo chunk */
8944 /* first the change from param to cookie */
8945 hdr = mtod(cookie, struct sctp_chunkhdr *);
8946 hdr->chunk_type = SCTP_COOKIE_ECHO;
8947 hdr->chunk_flags = 0;
8948 /* get the chunk stuff now and place it in the FRONT of the queue */
8949 sctp_alloc_a_chunk(stcb, chk);
8952 sctp_m_freem(cookie);
8955 chk->copy_by_ref = 0;
8956 chk->send_size = plen;
8957 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8958 chk->rec.chunk_id.can_take_data = 0;
8959 chk->sent = SCTP_DATAGRAM_UNSENT;
8961 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8962 chk->asoc = &stcb->asoc;
8965 atomic_add_int(&chk->whoTo->ref_count, 1);
8966 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8967 chk->asoc->ctrl_queue_cnt++;
8972 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
8976 struct sctp_nets *net)
8979 * take a HB request and make it into a HB ack and send it.
8981 struct mbuf *outchain;
8982 struct sctp_chunkhdr *chdr;
8983 struct sctp_tmit_chunk *chk;
8987 /* must have a net pointer */
8990 outchain = SCTP_M_COPYM(m, offset, chk_length, M_DONTWAIT);
8991 if (outchain == NULL) {
8992 /* gak out of memory */
8995 #ifdef SCTP_MBUF_LOGGING
8996 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8999 for (mat = outchain; mat; mat = SCTP_BUF_NEXT(mat)) {
9000 if (SCTP_BUF_IS_EXTENDED(mat)) {
9001 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9006 chdr = mtod(outchain, struct sctp_chunkhdr *);
9007 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9008 chdr->chunk_flags = 0;
9009 if (chk_length % 4) {
9011 uint32_t cpthis = 0;
9014 padlen = 4 - (chk_length % 4);
9015 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9017 sctp_alloc_a_chunk(stcb, chk);
9020 sctp_m_freem(outchain);
9023 chk->copy_by_ref = 0;
9024 chk->send_size = chk_length;
9025 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9026 chk->rec.chunk_id.can_take_data = 1;
9027 chk->sent = SCTP_DATAGRAM_UNSENT;
9030 chk->asoc = &stcb->asoc;
9031 chk->data = outchain;
9033 atomic_add_int(&chk->whoTo->ref_count, 1);
9034 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9035 chk->asoc->ctrl_queue_cnt++;
9039 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9041 /* formulate and queue a cookie-ack back to sender */
9042 struct mbuf *cookie_ack;
9043 struct sctp_chunkhdr *hdr;
9044 struct sctp_tmit_chunk *chk;
9047 SCTP_TCB_LOCK_ASSERT(stcb);
9049 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
9050 if (cookie_ack == NULL) {
9054 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9055 sctp_alloc_a_chunk(stcb, chk);
9058 sctp_m_freem(cookie_ack);
9061 chk->copy_by_ref = 0;
9062 chk->send_size = sizeof(struct sctp_chunkhdr);
9063 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9064 chk->rec.chunk_id.can_take_data = 1;
9065 chk->sent = SCTP_DATAGRAM_UNSENT;
9068 chk->asoc = &stcb->asoc;
9069 chk->data = cookie_ack;
9070 if (chk->asoc->last_control_chunk_from != NULL) {
9071 chk->whoTo = chk->asoc->last_control_chunk_from;
9072 atomic_add_int(&chk->whoTo->ref_count, 1);
9076 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9077 hdr->chunk_type = SCTP_COOKIE_ACK;
9078 hdr->chunk_flags = 0;
9079 hdr->chunk_length = htons(chk->send_size);
9080 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9081 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9082 chk->asoc->ctrl_queue_cnt++;
9088 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9090 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9091 struct mbuf *m_shutdown_ack;
9092 struct sctp_shutdown_ack_chunk *ack_cp;
9093 struct sctp_tmit_chunk *chk;
9095 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9096 if (m_shutdown_ack == NULL) {
9100 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9101 sctp_alloc_a_chunk(stcb, chk);
9104 sctp_m_freem(m_shutdown_ack);
9107 chk->copy_by_ref = 0;
9108 chk->send_size = sizeof(struct sctp_chunkhdr);
9109 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9110 chk->rec.chunk_id.can_take_data = 1;
9111 chk->sent = SCTP_DATAGRAM_UNSENT;
9114 chk->asoc = &stcb->asoc;
9115 chk->data = m_shutdown_ack;
9118 atomic_add_int(&chk->whoTo->ref_count, 1);
9120 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9121 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9122 ack_cp->ch.chunk_flags = 0;
9123 ack_cp->ch.chunk_length = htons(chk->send_size);
9124 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9125 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9126 chk->asoc->ctrl_queue_cnt++;
9131 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9133 /* formulate and queue a SHUTDOWN to the sender */
9134 struct mbuf *m_shutdown;
9135 struct sctp_shutdown_chunk *shutdown_cp;
9136 struct sctp_tmit_chunk *chk;
9138 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9139 if (m_shutdown == NULL) {
9143 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9144 sctp_alloc_a_chunk(stcb, chk);
9147 sctp_m_freem(m_shutdown);
9150 chk->copy_by_ref = 0;
9151 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9152 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9153 chk->rec.chunk_id.can_take_data = 1;
9154 chk->sent = SCTP_DATAGRAM_UNSENT;
9157 chk->asoc = &stcb->asoc;
9158 chk->data = m_shutdown;
9161 atomic_add_int(&chk->whoTo->ref_count, 1);
9163 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9164 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9165 shutdown_cp->ch.chunk_flags = 0;
9166 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9167 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9168 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9169 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9170 chk->asoc->ctrl_queue_cnt++;
9175 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9178 * formulate and queue an ASCONF to the peer. ASCONF parameters
9179 * should be queued on the assoc queue.
9181 struct sctp_tmit_chunk *chk;
9182 struct mbuf *m_asconf;
9185 SCTP_TCB_LOCK_ASSERT(stcb);
9187 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9188 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9189 /* can't send a new one if there is one in flight already */
9192 /* compose an ASCONF chunk, maximum length is PMTU */
9193 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9194 if (m_asconf == NULL) {
9197 sctp_alloc_a_chunk(stcb, chk);
9200 sctp_m_freem(m_asconf);
9203 chk->copy_by_ref = 0;
9204 chk->data = m_asconf;
9205 chk->send_size = len;
9206 chk->rec.chunk_id.id = SCTP_ASCONF;
9207 chk->rec.chunk_id.can_take_data = 0;
9208 chk->sent = SCTP_DATAGRAM_UNSENT;
9210 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9211 chk->asoc = &stcb->asoc;
9214 atomic_add_int(&chk->whoTo->ref_count, 1);
9216 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9217 chk->asoc->ctrl_queue_cnt++;
9222 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9225 * formulate and queue a asconf-ack back to sender. the asconf-ack
9226 * must be stored in the tcb.
9228 struct sctp_tmit_chunk *chk;
9229 struct sctp_asconf_ack *ack, *latest_ack;
9231 struct sctp_nets *net = NULL;
9233 SCTP_TCB_LOCK_ASSERT(stcb);
9234 /* Get the latest ASCONF-ACK */
9235 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9236 if (latest_ack == NULL) {
9239 if (latest_ack->last_sent_to != NULL &&
9240 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9241 /* we're doing a retransmission */
9242 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9245 if (stcb->asoc.last_control_chunk_from == NULL) {
9246 if (stcb->asoc.alternate) {
9247 net = stcb->asoc.alternate;
9249 net = stcb->asoc.primary_destination;
9252 net = stcb->asoc.last_control_chunk_from;
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;
9267 latest_ack->last_sent_to = net;
9269 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9270 if (ack->data == NULL) {
9273 /* copy the asconf_ack */
9274 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_DONTWAIT);
9275 if (m_ack == NULL) {
9276 /* couldn't copy it */
9279 #ifdef SCTP_MBUF_LOGGING
9280 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9283 for (mat = m_ack; mat; mat = SCTP_BUF_NEXT(mat)) {
9284 if (SCTP_BUF_IS_EXTENDED(mat)) {
9285 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9291 sctp_alloc_a_chunk(stcb, chk);
9295 sctp_m_freem(m_ack);
9298 chk->copy_by_ref = 0;
9302 atomic_add_int(&chk->whoTo->ref_count, 1);
9307 chk->send_size = ack->len;
9308 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9309 chk->rec.chunk_id.can_take_data = 1;
9310 chk->sent = SCTP_DATAGRAM_UNSENT;
9312 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */
9313 chk->asoc = &stcb->asoc;
9315 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9316 chk->asoc->ctrl_queue_cnt++;
9323 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9324 struct sctp_tcb *stcb,
9325 struct sctp_association *asoc,
9326 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9327 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9333 * send out one MTU of retransmission. If fast_retransmit is
9334 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9335 * rwnd. For a Cookie or Asconf in the control chunk queue we
9336 * retransmit them by themselves.
9338 * For data chunks we will pick out the lowest TSN's in the sent_queue
9339 * marked for resend and bundle them all together (up to a MTU of
9340 * destination). The address to send to should have been
9341 * selected/changed where the retransmission was marked (i.e. in FR
9342 * or t3-timeout routines).
9344 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9345 struct sctp_tmit_chunk *chk, *fwd;
9346 struct mbuf *m, *endofchain;
9347 struct sctp_nets *net = NULL;
9348 uint32_t tsns_sent = 0;
9349 int no_fragmentflg, bundle_at, cnt_thru;
9351 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9352 struct sctp_auth_chunk *auth = NULL;
9353 uint32_t auth_offset = 0;
9354 uint16_t auth_keyid;
9355 int override_ok = 1;
9356 int data_auth_reqd = 0;
9359 SCTP_TCB_LOCK_ASSERT(stcb);
9360 tmr_started = ctl_cnt = bundle_at = error = 0;
9365 endofchain = m = NULL;
9366 auth_keyid = stcb->asoc.authinfo.active_keyid;
9367 #ifdef SCTP_AUDITING_ENABLED
9368 sctp_audit_log(0xC3, 1);
9370 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9371 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9372 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9373 asoc->sent_queue_retran_cnt);
9374 asoc->sent_queue_cnt = 0;
9375 asoc->sent_queue_cnt_removeable = 0;
9376 /* send back 0/0 so we enter normal transmission */
9380 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9381 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9382 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9383 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9384 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9387 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9388 if (chk != asoc->str_reset) {
9390 * not eligible for retran if its
9397 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9401 * Add an AUTH chunk, if chunk requires it save the
9402 * offset into the chain for AUTH
9404 if ((auth == NULL) &&
9405 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9406 stcb->asoc.peer_auth_chunks))) {
9407 m = sctp_add_auth_chunk(m, &endofchain,
9408 &auth, &auth_offset,
9410 chk->rec.chunk_id.id);
9411 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9413 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9419 /* do we have control chunks to retransmit? */
9421 /* Start a timer no matter if we suceed or fail */
9422 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9423 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9424 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9425 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9426 chk->snd_count++; /* update our count */
9427 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9428 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9429 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9430 no_fragmentflg, 0, 0,
9431 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9432 chk->whoTo->port, so_locked, NULL, NULL))) {
9433 SCTP_STAT_INCR(sctps_lowlevelerr);
9440 * We don't want to mark the net->sent time here since this
9441 * we use this for HB and retrans cannot measure RTT
9443 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9445 chk->sent = SCTP_DATAGRAM_SENT;
9446 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9450 /* Clean up the fwd-tsn list */
9451 sctp_clean_up_ctl(stcb, asoc, so_locked);
9456 * Ok, it is just data retransmission we need to do or that and a
9457 * fwd-tsn with it all.
9459 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9460 return (SCTP_RETRAN_DONE);
9462 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9463 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9464 /* not yet open, resend the cookie and that is it */
9467 #ifdef SCTP_AUDITING_ENABLED
9468 sctp_auditing(20, inp, stcb, NULL);
9470 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9471 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9472 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9473 /* No, not sent to this net or not ready for rtx */
9476 if (chk->data == NULL) {
9477 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9478 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9481 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9482 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9483 /* Gak, we have exceeded max unlucky retran, abort! */
9484 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9486 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9487 atomic_add_int(&stcb->asoc.refcnt, 1);
9488 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked);
9489 SCTP_TCB_LOCK(stcb);
9490 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9491 return (SCTP_RETRAN_EXIT);
9493 /* pick up the net */
9495 switch (net->ro._l_addr.sa.sa_family) {
9498 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9503 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9512 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9513 /* No room in peers rwnd */
9516 tsn = asoc->last_acked_seq + 1;
9517 if (tsn == chk->rec.data.TSN_seq) {
9519 * we make a special exception for this
9520 * case. The peer has no rwnd but is missing
9521 * the lowest chunk.. which is probably what
9522 * is holding up the rwnd.
9524 goto one_chunk_around;
9529 if (asoc->peers_rwnd < mtu) {
9531 if ((asoc->peers_rwnd == 0) &&
9532 (asoc->total_flight == 0)) {
9533 chk->window_probe = 1;
9534 chk->whoTo->window_probe = 1;
9537 #ifdef SCTP_AUDITING_ENABLED
9538 sctp_audit_log(0xC3, 2);
9542 net->fast_retran_ip = 0;
9543 if (chk->rec.data.doing_fast_retransmit == 0) {
9545 * if no FR in progress skip destination that have
9546 * flight_size > cwnd.
9548 if (net->flight_size >= net->cwnd) {
9553 * Mark the destination net to have FR recovery
9557 net->fast_retran_ip = 1;
9561 * if no AUTH is yet included and this chunk requires it,
9562 * make sure to account for it. We don't apply the size
9563 * until the AUTH chunk is actually added below in case
9564 * there is no room for this chunk.
9566 if (data_auth_reqd && (auth == NULL)) {
9567 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9571 if ((chk->send_size <= (mtu - dmtu)) ||
9572 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9573 /* ok we will add this one */
9574 if (data_auth_reqd) {
9576 m = sctp_add_auth_chunk(m,
9582 auth_keyid = chk->auth_keyid;
9584 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9585 } else if (override_ok) {
9586 auth_keyid = chk->auth_keyid;
9588 } else if (chk->auth_keyid != auth_keyid) {
9589 /* different keyid, so done bundling */
9593 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9595 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9598 /* Do clear IP_DF ? */
9599 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9602 /* upate our MTU size */
9603 if (mtu > (chk->send_size + dmtu))
9604 mtu -= (chk->send_size + dmtu);
9607 data_list[bundle_at++] = chk;
9608 if (one_chunk && (asoc->total_flight <= 0)) {
9609 SCTP_STAT_INCR(sctps_windowprobed);
9612 if (one_chunk == 0) {
9614 * now are there anymore forward from chk to pick
9617 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9618 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9619 /* Nope, not for retran */
9622 if (fwd->whoTo != net) {
9623 /* Nope, not the net in question */
9626 if (data_auth_reqd && (auth == NULL)) {
9627 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9630 if (fwd->send_size <= (mtu - dmtu)) {
9631 if (data_auth_reqd) {
9633 m = sctp_add_auth_chunk(m,
9639 auth_keyid = fwd->auth_keyid;
9641 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9642 } else if (override_ok) {
9643 auth_keyid = fwd->auth_keyid;
9645 } else if (fwd->auth_keyid != auth_keyid) {
9653 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9655 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9658 /* Do clear IP_DF ? */
9659 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9662 /* upate our MTU size */
9663 if (mtu > (fwd->send_size + dmtu))
9664 mtu -= (fwd->send_size + dmtu);
9667 data_list[bundle_at++] = fwd;
9668 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9672 /* can't fit so we are done */
9677 /* Is there something to send for this destination? */
9680 * No matter if we fail/or suceed we should start a
9681 * timer. A failure is like a lost IP packet :-)
9683 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9685 * no timer running on this destination
9688 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9691 /* Now lets send it, if there is anything to send :> */
9692 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9693 (struct sockaddr *)&net->ro._l_addr, m,
9694 auth_offset, auth, auth_keyid,
9695 no_fragmentflg, 0, 0,
9696 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9697 net->port, so_locked, NULL, NULL))) {
9698 /* error, we could not output */
9699 SCTP_STAT_INCR(sctps_lowlevelerr);
9707 * We don't want to mark the net->sent time here
9708 * since this we use this for HB and retrans cannot
9711 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9713 /* For auto-close */
9715 if (*now_filled == 0) {
9716 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9717 *now = asoc->time_last_sent;
9720 asoc->time_last_sent = *now;
9722 *cnt_out += bundle_at;
9723 #ifdef SCTP_AUDITING_ENABLED
9724 sctp_audit_log(0xC4, bundle_at);
9727 tsns_sent = data_list[0]->rec.data.TSN_seq;
9729 for (i = 0; i < bundle_at; i++) {
9730 SCTP_STAT_INCR(sctps_sendretransdata);
9731 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9733 * When we have a revoked data, and we
9734 * retransmit it, then we clear the revoked
9735 * flag since this flag dictates if we
9736 * subtracted from the fs
9738 if (data_list[i]->rec.data.chunk_was_revoked) {
9739 /* Deflate the cwnd */
9740 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9741 data_list[i]->rec.data.chunk_was_revoked = 0;
9743 data_list[i]->snd_count++;
9744 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9745 /* record the time */
9746 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9747 if (data_list[i]->book_size_scale) {
9749 * need to double the book size on
9752 data_list[i]->book_size_scale = 0;
9754 * Since we double the booksize, we
9755 * must also double the output queue
9756 * size, since this get shrunk when
9757 * we free by this amount.
9759 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9760 data_list[i]->book_size *= 2;
9764 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9765 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9766 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9768 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9769 (uint32_t) (data_list[i]->send_size +
9770 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9772 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9773 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9774 data_list[i]->whoTo->flight_size,
9775 data_list[i]->book_size,
9776 (uintptr_t) data_list[i]->whoTo,
9777 data_list[i]->rec.data.TSN_seq);
9779 sctp_flight_size_increase(data_list[i]);
9780 sctp_total_flight_increase(stcb, data_list[i]);
9781 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9782 /* SWS sender side engages */
9783 asoc->peers_rwnd = 0;
9786 (data_list[i]->rec.data.doing_fast_retransmit)) {
9787 SCTP_STAT_INCR(sctps_sendfastretrans);
9788 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9789 (tmr_started == 0)) {
9791 * ok we just fast-retrans'd
9792 * the lowest TSN, i.e the
9793 * first on the list. In
9794 * this case we want to give
9795 * some more time to get a
9796 * SACK back without a
9799 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9800 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
9801 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9805 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9806 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9808 #ifdef SCTP_AUDITING_ENABLED
9809 sctp_auditing(21, inp, stcb, NULL);
9815 if (asoc->sent_queue_retran_cnt <= 0) {
9816 /* all done we have no more to retran */
9817 asoc->sent_queue_retran_cnt = 0;
9821 /* No more room in rwnd */
9824 /* stop the for loop here. we sent out a packet */
9831 sctp_timer_validation(struct sctp_inpcb *inp,
9832 struct sctp_tcb *stcb,
9833 struct sctp_association *asoc)
9835 struct sctp_nets *net;
9837 /* Validate that a timer is running somewhere */
9838 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9839 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9840 /* Here is a timer */
9844 SCTP_TCB_LOCK_ASSERT(stcb);
9845 /* Gak, we did not have a timer somewhere */
9846 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9847 if (asoc->alternate) {
9848 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9850 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9856 sctp_chunk_output(struct sctp_inpcb *inp,
9857 struct sctp_tcb *stcb,
9860 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9866 * Ok this is the generic chunk service queue. we must do the
9868 * - See if there are retransmits pending, if so we must
9870 * - Service the stream queue that is next, moving any
9871 * message (note I must get a complete message i.e.
9872 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9874 * - Check to see if the cwnd/rwnd allows any output, if so we
9875 * go ahead and fomulate and send the low level chunks. Making sure
9876 * to combine any control in the control chunk queue also.
9878 struct sctp_association *asoc;
9879 struct sctp_nets *net;
9880 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0;
9881 unsigned int burst_cnt = 0;
9885 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9888 unsigned int tot_frs = 0;
9891 /* The Nagle algorithm is only applied when handling a send call. */
9892 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9893 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9901 SCTP_TCB_LOCK_ASSERT(stcb);
9903 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9905 if ((un_sent <= 0) &&
9906 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9907 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9908 (asoc->sent_queue_retran_cnt == 0)) {
9909 /* Nothing to do unless there is something to be sent left */
9913 * Do we have something to send, data or control AND a sack timer
9914 * running, if so piggy-back the sack.
9916 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9917 sctp_send_sack(stcb, so_locked);
9918 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9920 while (asoc->sent_queue_retran_cnt) {
9922 * Ok, it is retransmission time only, we send out only ONE
9923 * packet with a single call off to the retran code.
9925 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9927 * Special hook for handling cookiess discarded
9928 * by peer that carried data. Send cookie-ack only
9929 * and then the next call with get the retran's.
9931 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9933 &now, &now_filled, frag_point, so_locked);
9935 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9936 /* if its not from a HB then do it */
9938 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9944 * its from any other place, we don't allow retran
9945 * output (only control)
9950 /* Can't send anymore */
9952 * now lets push out control by calling med-level
9953 * output once. this assures that we WILL send HB's
9956 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9958 &now, &now_filled, frag_point, so_locked);
9959 #ifdef SCTP_AUDITING_ENABLED
9960 sctp_auditing(8, inp, stcb, NULL);
9962 sctp_timer_validation(inp, stcb, asoc);
9967 * The count was off.. retran is not happening so do
9968 * the normal retransmission.
9970 #ifdef SCTP_AUDITING_ENABLED
9971 sctp_auditing(9, inp, stcb, NULL);
9973 if (ret == SCTP_RETRAN_EXIT) {
9978 if (from_where == SCTP_OUTPUT_FROM_T3) {
9979 /* Only one transmission allowed out of a timeout */
9980 #ifdef SCTP_AUDITING_ENABLED
9981 sctp_auditing(10, inp, stcb, NULL);
9983 /* Push out any control */
9984 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
9985 &now, &now_filled, frag_point, so_locked);
9988 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
9989 /* Hit FR burst limit */
9992 if ((num_out == 0) && (ret == 0)) {
9993 /* No more retrans to send */
9997 #ifdef SCTP_AUDITING_ENABLED
9998 sctp_auditing(12, inp, stcb, NULL);
10000 /* Check for bad destinations, if they exist move chunks around. */
10001 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10002 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10004 * if possible move things off of this address we
10005 * still may send below due to the dormant state but
10006 * we try to find an alternate address to send to
10007 * and if we have one we move all queued data on the
10008 * out wheel to this alternate address.
10010 if (net->ref_count > 1)
10011 sctp_move_chunks_from_net(stcb, net);
10014 * if ((asoc->sat_network) || (net->addr_is_local))
10015 * { burst_limit = asoc->max_burst *
10016 * SCTP_SAT_NETWORK_BURST_INCR; }
10018 if (asoc->max_burst > 0) {
10019 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10020 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10022 * JRS - Use the congestion
10023 * control given in the
10024 * congestion control module
10026 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10027 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10028 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10030 SCTP_STAT_INCR(sctps_maxburstqueued);
10032 net->fast_retran_ip = 0;
10034 if (net->flight_size == 0) {
10036 * Should be decaying the
10048 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10049 &reason_code, 0, from_where,
10050 &now, &now_filled, frag_point, so_locked);
10052 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10053 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10054 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10056 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10057 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10058 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10062 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10064 tot_out += num_out;
10066 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10067 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10068 if (num_out == 0) {
10069 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10074 * When the Nagle algorithm is used, look at how
10075 * much is unsent, then if its smaller than an MTU
10076 * and we have data in flight we stop, except if we
10077 * are handling a fragmented user message.
10079 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10080 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10081 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10082 (stcb->asoc.total_flight > 0) &&
10083 ((stcb->asoc.locked_on_sending == NULL) ||
10084 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10088 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10089 TAILQ_EMPTY(&asoc->send_queue) &&
10090 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10091 /* Nothing left to send */
10094 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10095 /* Nothing left to send */
10098 } while (num_out &&
10099 ((asoc->max_burst == 0) ||
10100 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10101 (burst_cnt < asoc->max_burst)));
10103 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10104 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10105 SCTP_STAT_INCR(sctps_maxburstqueued);
10106 asoc->burst_limit_applied = 1;
10107 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10108 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10111 asoc->burst_limit_applied = 0;
10114 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10115 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10117 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10121 * Now we need to clean up the control chunk chain if a ECNE is on
10122 * it. It must be marked as UNSENT again so next call will continue
10123 * to send it until such time that we get a CWR, to remove it.
10125 if (stcb->asoc.ecn_echo_cnt_onq)
10126 sctp_fix_ecn_echo(asoc);
10133 struct sctp_inpcb *inp,
10135 struct sockaddr *addr,
10136 struct mbuf *control,
10141 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10144 if (inp->sctp_socket == NULL) {
10145 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10148 return (sctp_sosend(inp->sctp_socket,
10150 (struct uio *)NULL,
10158 send_forward_tsn(struct sctp_tcb *stcb,
10159 struct sctp_association *asoc)
10161 struct sctp_tmit_chunk *chk;
10162 struct sctp_forward_tsn_chunk *fwdtsn;
10163 uint32_t advance_peer_ack_point;
10165 SCTP_TCB_LOCK_ASSERT(stcb);
10166 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10167 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10168 /* mark it to unsent */
10169 chk->sent = SCTP_DATAGRAM_UNSENT;
10170 chk->snd_count = 0;
10171 /* Do we correct its output location? */
10173 sctp_free_remote_addr(chk->whoTo);
10176 goto sctp_fill_in_rest;
10179 /* Ok if we reach here we must build one */
10180 sctp_alloc_a_chunk(stcb, chk);
10184 asoc->fwd_tsn_cnt++;
10185 chk->copy_by_ref = 0;
10186 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10187 chk->rec.chunk_id.can_take_data = 0;
10190 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
10191 if (chk->data == NULL) {
10192 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10195 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10196 chk->sent = SCTP_DATAGRAM_UNSENT;
10197 chk->snd_count = 0;
10198 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10199 asoc->ctrl_queue_cnt++;
10202 * Here we go through and fill out the part that deals with
10203 * stream/seq of the ones we skip.
10205 SCTP_BUF_LEN(chk->data) = 0;
10207 struct sctp_tmit_chunk *at, *tp1, *last;
10208 struct sctp_strseq *strseq;
10209 unsigned int cnt_of_space, i, ovh;
10210 unsigned int space_needed;
10211 unsigned int cnt_of_skipped = 0;
10213 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10214 if (at->sent != SCTP_FORWARD_TSN_SKIP) {
10215 /* no more to look at */
10218 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10219 /* We don't report these */
10224 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10225 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10227 cnt_of_space = M_TRAILINGSPACE(chk->data);
10229 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10230 ovh = SCTP_MIN_OVERHEAD;
10232 ovh = SCTP_MIN_V4_OVERHEAD;
10234 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10235 /* trim to a mtu size */
10236 cnt_of_space = asoc->smallest_mtu - ovh;
10238 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10239 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10240 0xff, 0, cnt_of_skipped,
10241 asoc->advanced_peer_ack_point);
10244 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10245 if (cnt_of_space < space_needed) {
10247 * ok we must trim down the chunk by lowering the
10248 * advance peer ack point.
10250 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10251 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10252 0xff, 0xff, cnt_of_space,
10255 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10256 cnt_of_skipped /= sizeof(struct sctp_strseq);
10258 * Go through and find the TSN that will be the one
10261 at = TAILQ_FIRST(&asoc->sent_queue);
10263 for (i = 0; i < cnt_of_skipped; i++) {
10264 tp1 = TAILQ_NEXT(at, sctp_next);
10271 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10272 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10273 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10274 asoc->advanced_peer_ack_point);
10278 * last now points to last one I can report, update
10282 advance_peer_ack_point = last->rec.data.TSN_seq;
10283 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10284 cnt_of_skipped * sizeof(struct sctp_strseq);
10286 chk->send_size = space_needed;
10287 /* Setup the chunk */
10288 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10289 fwdtsn->ch.chunk_length = htons(chk->send_size);
10290 fwdtsn->ch.chunk_flags = 0;
10291 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10292 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10293 SCTP_BUF_LEN(chk->data) = chk->send_size;
10296 * Move pointer to after the fwdtsn and transfer to the
10299 strseq = (struct sctp_strseq *)fwdtsn;
10301 * Now populate the strseq list. This is done blindly
10302 * without pulling out duplicate stream info. This is
10303 * inefficent but won't harm the process since the peer will
10304 * look at these in sequence and will thus release anything.
10305 * It could mean we exceed the PMTU and chop off some that
10306 * we could have included.. but this is unlikely (aka 1432/4
10307 * would mean 300+ stream seq's would have to be reported in
10308 * one FWD-TSN. With a bit of work we can later FIX this to
10309 * optimize and pull out duplcates.. but it does add more
10310 * overhead. So for now... not!
10312 at = TAILQ_FIRST(&asoc->sent_queue);
10313 for (i = 0; i < cnt_of_skipped; i++) {
10314 tp1 = TAILQ_NEXT(at, sctp_next);
10317 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10318 /* We don't report these */
10323 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10324 at->rec.data.fwd_tsn_cnt = 0;
10326 strseq->stream = ntohs(at->rec.data.stream_number);
10327 strseq->sequence = ntohs(at->rec.data.stream_seq);
10336 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10337 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10343 * Queue up a SACK or NR-SACK in the control queue.
10344 * We must first check to see if a SACK or NR-SACK is
10345 * somehow on the control queue.
10346 * If so, we will take and and remove the old one.
10348 struct sctp_association *asoc;
10349 struct sctp_tmit_chunk *chk, *a_chk;
10350 struct sctp_sack_chunk *sack;
10351 struct sctp_nr_sack_chunk *nr_sack;
10352 struct sctp_gap_ack_block *gap_descriptor;
10353 struct sack_track *selector;
10358 int limit_reached = 0;
10359 unsigned int i, siz, j;
10360 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10363 uint32_t highest_tsn;
10368 if ((stcb->asoc.sctp_nr_sack_on_off == 1) &&
10369 (stcb->asoc.peer_supports_nr_sack == 1)) {
10370 type = SCTP_NR_SELECTIVE_ACK;
10372 type = SCTP_SELECTIVE_ACK;
10375 asoc = &stcb->asoc;
10376 SCTP_TCB_LOCK_ASSERT(stcb);
10377 if (asoc->last_data_chunk_from == NULL) {
10378 /* Hmm we never received anything */
10381 sctp_slide_mapping_arrays(stcb);
10382 sctp_set_rwnd(stcb, asoc);
10383 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10384 if (chk->rec.chunk_id.id == type) {
10385 /* Hmm, found a sack already on queue, remove it */
10386 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10387 asoc->ctrl_queue_cnt--;
10390 sctp_m_freem(a_chk->data);
10391 a_chk->data = NULL;
10393 if (a_chk->whoTo) {
10394 sctp_free_remote_addr(a_chk->whoTo);
10395 a_chk->whoTo = NULL;
10400 if (a_chk == NULL) {
10401 sctp_alloc_a_chunk(stcb, a_chk);
10402 if (a_chk == NULL) {
10403 /* No memory so we drop the idea, and set a timer */
10404 if (stcb->asoc.delayed_ack) {
10405 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10406 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10407 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10408 stcb->sctp_ep, stcb, NULL);
10410 stcb->asoc.send_sack = 1;
10414 a_chk->copy_by_ref = 0;
10415 a_chk->rec.chunk_id.id = type;
10416 a_chk->rec.chunk_id.can_take_data = 1;
10418 /* Clear our pkt counts */
10419 asoc->data_pkts_seen = 0;
10421 a_chk->asoc = asoc;
10422 a_chk->snd_count = 0;
10423 a_chk->send_size = 0; /* fill in later */
10424 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10425 a_chk->whoTo = NULL;
10427 if ((asoc->numduptsns) ||
10428 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) {
10430 * Ok, we have some duplicates or the destination for the
10431 * sack is unreachable, lets see if we can select an
10432 * alternate than asoc->last_data_chunk_from
10434 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) &&
10435 (asoc->used_alt_onsack > asoc->numnets)) {
10436 /* We used an alt last time, don't this time */
10437 a_chk->whoTo = NULL;
10439 asoc->used_alt_onsack++;
10440 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10442 if (a_chk->whoTo == NULL) {
10443 /* Nope, no alternate */
10444 a_chk->whoTo = asoc->last_data_chunk_from;
10445 asoc->used_alt_onsack = 0;
10449 * No duplicates so we use the last place we received data
10452 asoc->used_alt_onsack = 0;
10453 a_chk->whoTo = asoc->last_data_chunk_from;
10455 if (a_chk->whoTo) {
10456 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10458 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10459 highest_tsn = asoc->highest_tsn_inside_map;
10461 highest_tsn = asoc->highest_tsn_inside_nr_map;
10463 if (highest_tsn == asoc->cumulative_tsn) {
10465 if (type == SCTP_SELECTIVE_ACK) {
10466 space_req = sizeof(struct sctp_sack_chunk);
10468 space_req = sizeof(struct sctp_nr_sack_chunk);
10471 /* gaps get a cluster */
10472 space_req = MCLBYTES;
10474 /* Ok now lets formulate a MBUF with our sack */
10475 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_DONTWAIT, 1, MT_DATA);
10476 if ((a_chk->data == NULL) ||
10477 (a_chk->whoTo == NULL)) {
10478 /* rats, no mbuf memory */
10480 /* was a problem with the destination */
10481 sctp_m_freem(a_chk->data);
10482 a_chk->data = NULL;
10484 sctp_free_a_chunk(stcb, a_chk, so_locked);
10485 /* sa_ignore NO_NULL_CHK */
10486 if (stcb->asoc.delayed_ack) {
10487 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10488 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
10489 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10490 stcb->sctp_ep, stcb, NULL);
10492 stcb->asoc.send_sack = 1;
10496 /* ok, lets go through and fill it in */
10497 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10498 space = M_TRAILINGSPACE(a_chk->data);
10499 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10500 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10502 limit = mtod(a_chk->data, caddr_t);
10507 if ((asoc->sctp_cmt_on_off > 0) &&
10508 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10510 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10511 * received, then set high bit to 1, else 0. Reset
10514 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10515 asoc->cmt_dac_pkts_rcvd = 0;
10517 #ifdef SCTP_ASOCLOG_OF_TSNS
10518 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10519 stcb->asoc.cumack_log_atsnt++;
10520 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10521 stcb->asoc.cumack_log_atsnt = 0;
10524 /* reset the readers interpretation */
10525 stcb->freed_by_sorcv_sincelast = 0;
10527 if (type == SCTP_SELECTIVE_ACK) {
10528 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10530 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10531 if (highest_tsn > asoc->mapping_array_base_tsn) {
10532 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10534 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10538 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10539 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10540 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10541 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10543 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10547 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10550 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10552 if (((type == SCTP_SELECTIVE_ACK) &&
10553 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10554 ((type == SCTP_NR_SELECTIVE_ACK) &&
10555 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10556 /* we have a gap .. maybe */
10557 for (i = 0; i < siz; i++) {
10558 tsn_map = asoc->mapping_array[i];
10559 if (type == SCTP_SELECTIVE_ACK) {
10560 tsn_map |= asoc->nr_mapping_array[i];
10564 * Clear all bits corresponding to TSNs
10565 * smaller or equal to the cumulative TSN.
10567 tsn_map &= (~0 << (1 - offset));
10569 selector = &sack_array[tsn_map];
10570 if (mergeable && selector->right_edge) {
10572 * Backup, left and right edges were ok to
10578 if (selector->num_entries == 0)
10581 for (j = 0; j < selector->num_entries; j++) {
10582 if (mergeable && selector->right_edge) {
10584 * do a merge by NOT setting
10590 * no merge, set the left
10594 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10596 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10599 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10605 if (selector->left_edge) {
10609 if (limit_reached) {
10610 /* Reached the limit stop */
10616 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10617 (limit_reached == 0)) {
10621 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10622 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10624 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10627 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10630 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10632 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10633 /* we have a gap .. maybe */
10634 for (i = 0; i < siz; i++) {
10635 tsn_map = asoc->nr_mapping_array[i];
10638 * Clear all bits corresponding to
10639 * TSNs smaller or equal to the
10642 tsn_map &= (~0 << (1 - offset));
10644 selector = &sack_array[tsn_map];
10645 if (mergeable && selector->right_edge) {
10647 * Backup, left and right edges were
10650 num_nr_gap_blocks--;
10653 if (selector->num_entries == 0)
10656 for (j = 0; j < selector->num_entries; j++) {
10657 if (mergeable && selector->right_edge) {
10659 * do a merge by NOT
10666 * no merge, set the
10670 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10672 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10673 num_nr_gap_blocks++;
10675 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10681 if (selector->left_edge) {
10685 if (limit_reached) {
10686 /* Reached the limit stop */
10693 /* now we must add any dups we are going to report. */
10694 if ((limit_reached == 0) && (asoc->numduptsns)) {
10695 dup = (uint32_t *) gap_descriptor;
10696 for (i = 0; i < asoc->numduptsns; i++) {
10697 *dup = htonl(asoc->dup_tsns[i]);
10700 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10705 asoc->numduptsns = 0;
10708 * now that the chunk is prepared queue it to the control chunk
10711 if (type == SCTP_SELECTIVE_ACK) {
10712 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10713 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10714 num_dups * sizeof(int32_t);
10715 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10716 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10717 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10718 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10719 sack->sack.num_dup_tsns = htons(num_dups);
10720 sack->ch.chunk_type = type;
10721 sack->ch.chunk_flags = flags;
10722 sack->ch.chunk_length = htons(a_chk->send_size);
10724 a_chk->send_size = sizeof(struct sctp_nr_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 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10729 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10730 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10731 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10732 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10733 nr_sack->nr_sack.reserved = 0;
10734 nr_sack->ch.chunk_type = type;
10735 nr_sack->ch.chunk_flags = flags;
10736 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10738 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10739 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10740 asoc->ctrl_queue_cnt++;
10741 asoc->send_sack = 0;
10742 SCTP_STAT_INCR(sctps_sendsacks);
10747 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10748 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10753 struct mbuf *m_abort;
10754 struct mbuf *m_out = NULL, *m_end = NULL;
10755 struct sctp_abort_chunk *abort = NULL;
10757 uint32_t auth_offset = 0;
10758 struct sctp_auth_chunk *auth = NULL;
10759 struct sctp_nets *net;
10762 * Add an AUTH chunk, if chunk requires it and save the offset into
10763 * the chain for AUTH
10765 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10766 stcb->asoc.peer_auth_chunks)) {
10767 m_out = sctp_add_auth_chunk(m_out, &m_end, &auth, &auth_offset,
10768 stcb, SCTP_ABORT_ASSOCIATION);
10769 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10771 SCTP_TCB_LOCK_ASSERT(stcb);
10772 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
10773 if (m_abort == NULL) {
10776 sctp_m_freem(m_out);
10779 /* link in any error */
10780 SCTP_BUF_NEXT(m_abort) = operr;
10787 sz += SCTP_BUF_LEN(n);
10788 n = SCTP_BUF_NEXT(n);
10791 SCTP_BUF_LEN(m_abort) = sizeof(*abort);
10792 if (m_out == NULL) {
10793 /* NO Auth chunk prepended, so reserve space in front */
10794 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10797 /* Put AUTH chunk at the front of the chain */
10798 SCTP_BUF_NEXT(m_end) = m_abort;
10800 if (stcb->asoc.alternate) {
10801 net = stcb->asoc.alternate;
10803 net = stcb->asoc.primary_destination;
10805 /* fill in the ABORT chunk */
10806 abort = mtod(m_abort, struct sctp_abort_chunk *);
10807 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10808 abort->ch.chunk_flags = 0;
10809 abort->ch.chunk_length = htons(sizeof(*abort) + sz);
10811 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10812 (struct sockaddr *)&net->ro._l_addr,
10813 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10814 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
10815 stcb->asoc.primary_destination->port, so_locked, NULL, NULL);
10816 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10820 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10821 struct sctp_nets *net,
10824 /* formulate and SEND a SHUTDOWN-COMPLETE */
10825 struct mbuf *m_shutdown_comp;
10826 struct sctp_shutdown_complete_chunk *shutdown_complete;
10830 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
10831 if (m_shutdown_comp == NULL) {
10835 if (reflect_vtag) {
10836 flags = SCTP_HAD_NO_TCB;
10837 vtag = stcb->asoc.my_vtag;
10840 vtag = stcb->asoc.peer_vtag;
10842 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10843 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10844 shutdown_complete->ch.chunk_flags = flags;
10845 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10846 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10847 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10848 (struct sockaddr *)&net->ro._l_addr,
10849 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10850 stcb->sctp_ep->sctp_lport, stcb->rport,
10852 net->port, SCTP_SO_NOT_LOCKED, NULL, NULL);
10853 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10858 sctp_send_resp_msg(struct mbuf *m, struct sctphdr *sh, uint32_t vtag,
10859 uint8_t type, struct mbuf *cause, uint32_t vrf_id, uint16_t port)
10861 struct mbuf *o_pak;
10863 struct sctphdr *shout;
10864 struct sctp_chunkhdr *ch;
10866 struct udphdr *udp;
10867 int len, cause_len, padding_len, ret;
10871 struct ip *iph_out;
10875 struct ip6_hdr *ip6, *ip6_out;
10879 /* Compute the length of the cause and add final padding. */
10881 if (cause != NULL) {
10882 struct mbuf *m_at, *m_last = NULL;
10884 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10885 if (SCTP_BUF_NEXT(m_at) == NULL)
10887 cause_len += SCTP_BUF_LEN(m_at);
10889 padding_len = cause_len % 4;
10890 if (padding_len != 0) {
10891 padding_len = 4 - padding_len;
10893 if (padding_len != 0) {
10894 if (sctp_add_pad_tombuf(m_last, padding_len)) {
10895 sctp_m_freem(cause);
10902 /* Get an mbuf for the header. */
10903 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
10904 iph = mtod(m, struct ip *);
10905 switch (iph->ip_v) {
10908 len += sizeof(struct ip);
10912 case IPV6_VERSION >> 4:
10913 len += sizeof(struct ip6_hdr);
10920 len += sizeof(struct udphdr);
10922 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
10923 if (mout == NULL) {
10925 sctp_m_freem(cause);
10929 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10930 SCTP_BUF_LEN(mout) = len;
10931 SCTP_BUF_NEXT(mout) = cause;
10932 if (m->m_flags & M_FLOWID) {
10933 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
10934 mout->m_flags |= M_FLOWID;
10942 switch (iph->ip_v) {
10945 iph_out = mtod(mout, struct ip *);
10946 iph_out->ip_v = IPVERSION;
10947 iph_out->ip_hl = (sizeof(struct ip) >> 2);
10948 iph_out->ip_tos = 0;
10949 iph_out->ip_id = ip_newid();
10950 iph_out->ip_off = 0;
10951 iph_out->ip_ttl = MODULE_GLOBAL(ip_defttl);
10953 iph_out->ip_p = IPPROTO_UDP;
10955 iph_out->ip_p = IPPROTO_SCTP;
10957 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
10958 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
10959 iph_out->ip_sum = 0;
10960 len = sizeof(struct ip);
10961 shout = (struct sctphdr *)((caddr_t)iph_out + len);
10965 case IPV6_VERSION >> 4:
10966 ip6 = (struct ip6_hdr *)iph;
10967 ip6_out = mtod(mout, struct ip6_hdr *);
10968 ip6_out->ip6_flow = htonl(0x60000000);
10969 if (V_ip6_auto_flowlabel) {
10970 ip6_out->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
10972 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
10974 ip6_out->ip6_nxt = IPPROTO_UDP;
10976 ip6_out->ip6_nxt = IPPROTO_SCTP;
10978 ip6_out->ip6_src = ip6->ip6_dst;
10979 ip6_out->ip6_dst = ip6->ip6_src;
10980 len = sizeof(struct ip6_hdr);
10981 shout = (struct sctphdr *)((caddr_t)ip6_out + len);
10986 shout = mtod(mout, struct sctphdr *);
10990 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
10991 sctp_m_freem(mout);
10994 udp = (struct udphdr *)shout;
10995 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
10996 udp->uh_dport = port;
10998 udp->uh_ulen = htons(sizeof(struct udphdr) +
10999 sizeof(struct sctphdr) +
11000 sizeof(struct sctp_chunkhdr) +
11001 cause_len + padding_len);
11002 len += sizeof(struct udphdr);
11003 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11007 shout->src_port = sh->dest_port;
11008 shout->dest_port = sh->src_port;
11009 shout->checksum = 0;
11011 shout->v_tag = htonl(vtag);
11013 shout->v_tag = sh->v_tag;
11015 len += sizeof(struct sctphdr);
11016 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11017 ch->chunk_type = type;
11019 ch->chunk_flags = 0;
11021 ch->chunk_flags = SCTP_HAD_NO_TCB;
11023 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
11024 len += sizeof(struct sctp_chunkhdr);
11025 len += cause_len + padding_len;
11027 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11028 sctp_m_freem(mout);
11031 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11033 if (iph_out != NULL) {
11034 /* zap the stack pointer to the route */
11035 bzero(&ro, sizeof(sctp_route_t));
11038 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11043 iph_out->ip_len = len;
11044 #ifdef SCTP_PACKET_LOGGING
11045 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11046 sctp_packet_log(mout, len);
11050 #if defined(SCTP_WITH_NO_CSUM)
11051 SCTP_STAT_INCR(sctps_sendnocrc);
11053 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11054 SCTP_STAT_INCR(sctps_sendswcrc);
11057 SCTP_ENABLE_UDP_CSUM(o_pak);
11060 #if defined(SCTP_WITH_NO_CSUM)
11061 SCTP_STAT_INCR(sctps_sendnocrc);
11063 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11064 mout->m_pkthdr.csum_data = 0;
11065 SCTP_STAT_INCR(sctps_sendhwcrc);
11068 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
11069 /* Free the route if we got one back */
11076 if (ip6_out != NULL) {
11077 ip6_out->ip6_plen = len - sizeof(struct ip6_hdr);
11078 #ifdef SCTP_PACKET_LOGGING
11079 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11080 sctp_packet_log(mout, len);
11084 #if defined(SCTP_WITH_NO_CSUM)
11085 SCTP_STAT_INCR(sctps_sendnocrc);
11087 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11088 SCTP_STAT_INCR(sctps_sendswcrc);
11090 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11091 udp->uh_sum = 0xffff;
11094 #if defined(SCTP_WITH_NO_CSUM)
11095 SCTP_STAT_INCR(sctps_sendnocrc);
11097 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11098 mout->m_pkthdr.csum_data = 0;
11099 SCTP_STAT_INCR(sctps_sendhwcrc);
11102 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11105 SCTP_STAT_INCR(sctps_sendpackets);
11106 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11107 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11112 sctp_send_shutdown_complete2(struct mbuf *m, struct sctphdr *sh,
11113 uint32_t vrf_id, uint16_t port)
11115 sctp_send_resp_msg(m, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL, vrf_id, port);
11119 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11120 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11125 struct sctp_tmit_chunk *chk;
11126 struct sctp_heartbeat_chunk *hb;
11127 struct timeval now;
11129 SCTP_TCB_LOCK_ASSERT(stcb);
11133 (void)SCTP_GETTIME_TIMEVAL(&now);
11134 switch (net->ro._l_addr.sa.sa_family) {
11146 sctp_alloc_a_chunk(stcb, chk);
11148 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11151 chk->copy_by_ref = 0;
11152 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11153 chk->rec.chunk_id.can_take_data = 1;
11154 chk->asoc = &stcb->asoc;
11155 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11157 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11158 if (chk->data == NULL) {
11159 sctp_free_a_chunk(stcb, chk, so_locked);
11162 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11163 SCTP_BUF_LEN(chk->data) = chk->send_size;
11164 chk->sent = SCTP_DATAGRAM_UNSENT;
11165 chk->snd_count = 0;
11167 atomic_add_int(&chk->whoTo->ref_count, 1);
11168 /* Now we have a mbuf that we can fill in with the details */
11169 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11170 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11171 /* fill out chunk header */
11172 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11173 hb->ch.chunk_flags = 0;
11174 hb->ch.chunk_length = htons(chk->send_size);
11175 /* Fill out hb parameter */
11176 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11177 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11178 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11179 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11180 /* Did our user request this one, put it in */
11181 hb->heartbeat.hb_info.addr_family = net->ro._l_addr.sa.sa_family;
11182 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11183 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11185 * we only take from the entropy pool if the address is not
11188 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11189 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11191 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11192 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11194 switch (net->ro._l_addr.sa.sa_family) {
11197 memcpy(hb->heartbeat.hb_info.address,
11198 &net->ro._l_addr.sin.sin_addr,
11199 sizeof(net->ro._l_addr.sin.sin_addr));
11204 memcpy(hb->heartbeat.hb_info.address,
11205 &net->ro._l_addr.sin6.sin6_addr,
11206 sizeof(net->ro._l_addr.sin6.sin6_addr));
11213 net->hb_responded = 0;
11214 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11215 stcb->asoc.ctrl_queue_cnt++;
11216 SCTP_STAT_INCR(sctps_sendheartbeat);
11221 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11224 struct sctp_association *asoc;
11225 struct sctp_ecne_chunk *ecne;
11226 struct sctp_tmit_chunk *chk;
11231 asoc = &stcb->asoc;
11232 SCTP_TCB_LOCK_ASSERT(stcb);
11233 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11234 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11235 /* found a previous ECN_ECHO update it if needed */
11236 uint32_t cnt, ctsn;
11238 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11239 ctsn = ntohl(ecne->tsn);
11240 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11241 ecne->tsn = htonl(high_tsn);
11242 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11244 cnt = ntohl(ecne->num_pkts_since_cwr);
11246 ecne->num_pkts_since_cwr = htonl(cnt);
11250 /* nope could not find one to update so we must build one */
11251 sctp_alloc_a_chunk(stcb, chk);
11255 chk->copy_by_ref = 0;
11256 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11257 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11258 chk->rec.chunk_id.can_take_data = 0;
11259 chk->asoc = &stcb->asoc;
11260 chk->send_size = sizeof(struct sctp_ecne_chunk);
11261 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11262 if (chk->data == NULL) {
11263 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11266 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11267 SCTP_BUF_LEN(chk->data) = chk->send_size;
11268 chk->sent = SCTP_DATAGRAM_UNSENT;
11269 chk->snd_count = 0;
11271 atomic_add_int(&chk->whoTo->ref_count, 1);
11273 stcb->asoc.ecn_echo_cnt_onq++;
11274 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11275 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11276 ecne->ch.chunk_flags = 0;
11277 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11278 ecne->tsn = htonl(high_tsn);
11279 ecne->num_pkts_since_cwr = htonl(1);
11280 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11281 asoc->ctrl_queue_cnt++;
11285 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11286 struct mbuf *m, int iphlen, int bad_crc)
11288 struct sctp_association *asoc;
11289 struct sctp_pktdrop_chunk *drp;
11290 struct sctp_tmit_chunk *chk;
11297 struct ip6_hdr *ip6h;
11300 int fullsz = 0, extra = 0;
11303 struct sctp_chunkhdr *ch, chunk_buf;
11304 unsigned int chk_length;
11309 asoc = &stcb->asoc;
11310 SCTP_TCB_LOCK_ASSERT(stcb);
11311 if (asoc->peer_supports_pktdrop == 0) {
11313 * peer must declare support before I send one.
11317 if (stcb->sctp_socket == NULL) {
11320 sctp_alloc_a_chunk(stcb, chk);
11324 chk->copy_by_ref = 0;
11325 iph = mtod(m, struct ip *);
11327 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11330 switch (iph->ip_v) {
11334 len = chk->send_size = iph->ip_len;
11338 case IPV6_VERSION >> 4:
11340 ip6h = mtod(m, struct ip6_hdr *);
11341 len = chk->send_size = htons(ip6h->ip6_plen);
11347 /* Validate that we do not have an ABORT in here. */
11348 offset = iphlen + sizeof(struct sctphdr);
11349 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11350 sizeof(*ch), (uint8_t *) & chunk_buf);
11351 while (ch != NULL) {
11352 chk_length = ntohs(ch->chunk_length);
11353 if (chk_length < sizeof(*ch)) {
11354 /* break to abort land */
11357 switch (ch->chunk_type) {
11358 case SCTP_PACKET_DROPPED:
11359 case SCTP_ABORT_ASSOCIATION:
11360 case SCTP_INITIATION_ACK:
11362 * We don't respond with an PKT-DROP to an ABORT
11363 * or PKT-DROP. We also do not respond to an
11364 * INIT-ACK, because we can't know if the initiation
11365 * tag is correct or not.
11367 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11372 offset += SCTP_SIZE32(chk_length);
11373 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11374 sizeof(*ch), (uint8_t *) & chunk_buf);
11377 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11378 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11380 * only send 1 mtu worth, trim off the excess on the end.
11382 fullsz = len - extra;
11383 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11386 chk->asoc = &stcb->asoc;
11387 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11388 if (chk->data == NULL) {
11390 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11393 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11394 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11396 sctp_m_freem(chk->data);
11400 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11401 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11402 chk->book_size_scale = 0;
11404 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11405 drp->trunc_len = htons(fullsz);
11407 * Len is already adjusted to size minus overhead above take
11408 * out the pkt_drop chunk itself from it.
11410 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11411 len = chk->send_size;
11413 /* no truncation needed */
11414 drp->ch.chunk_flags = 0;
11415 drp->trunc_len = htons(0);
11418 drp->ch.chunk_flags |= SCTP_BADCRC;
11420 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11421 SCTP_BUF_LEN(chk->data) = chk->send_size;
11422 chk->sent = SCTP_DATAGRAM_UNSENT;
11423 chk->snd_count = 0;
11425 /* we should hit here */
11427 atomic_add_int(&chk->whoTo->ref_count, 1);
11431 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11432 chk->rec.chunk_id.can_take_data = 1;
11433 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11434 drp->ch.chunk_length = htons(chk->send_size);
11435 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11439 drp->bottle_bw = htonl(spc);
11440 if (asoc->my_rwnd) {
11441 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11442 asoc->size_on_all_streams +
11443 asoc->my_rwnd_control_len +
11444 stcb->sctp_socket->so_rcv.sb_cc);
11447 * If my rwnd is 0, possibly from mbuf depletion as well as
11448 * space used, tell the peer there is NO space aka onq == bw
11450 drp->current_onq = htonl(spc);
11454 m_copydata(m, iphlen, len, (caddr_t)datap);
11455 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11456 asoc->ctrl_queue_cnt++;
11460 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11462 struct sctp_association *asoc;
11463 struct sctp_cwr_chunk *cwr;
11464 struct sctp_tmit_chunk *chk;
11466 asoc = &stcb->asoc;
11467 SCTP_TCB_LOCK_ASSERT(stcb);
11471 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11472 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11474 * found a previous CWR queued to same destination
11475 * update it if needed
11479 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11480 ctsn = ntohl(cwr->tsn);
11481 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11482 cwr->tsn = htonl(high_tsn);
11484 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11485 /* Make sure override is carried */
11486 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11491 sctp_alloc_a_chunk(stcb, chk);
11495 chk->copy_by_ref = 0;
11496 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11497 chk->rec.chunk_id.can_take_data = 1;
11498 chk->asoc = &stcb->asoc;
11499 chk->send_size = sizeof(struct sctp_cwr_chunk);
11500 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11501 if (chk->data == NULL) {
11502 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11505 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11506 SCTP_BUF_LEN(chk->data) = chk->send_size;
11507 chk->sent = SCTP_DATAGRAM_UNSENT;
11508 chk->snd_count = 0;
11510 atomic_add_int(&chk->whoTo->ref_count, 1);
11511 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11512 cwr->ch.chunk_type = SCTP_ECN_CWR;
11513 cwr->ch.chunk_flags = override;
11514 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11515 cwr->tsn = htonl(high_tsn);
11516 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11517 asoc->ctrl_queue_cnt++;
11521 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11522 int number_entries, uint16_t * list,
11523 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11525 int len, old_len, i;
11526 struct sctp_stream_reset_out_request *req_out;
11527 struct sctp_chunkhdr *ch;
11529 ch = mtod(chk->data, struct sctp_chunkhdr *);
11532 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11534 /* get to new offset for the param. */
11535 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11536 /* now how long will this param be? */
11537 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11538 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11539 req_out->ph.param_length = htons(len);
11540 req_out->request_seq = htonl(seq);
11541 req_out->response_seq = htonl(resp_seq);
11542 req_out->send_reset_at_tsn = htonl(last_sent);
11543 if (number_entries) {
11544 for (i = 0; i < number_entries; i++) {
11545 req_out->list_of_streams[i] = htons(list[i]);
11548 if (SCTP_SIZE32(len) > len) {
11550 * Need to worry about the pad we may end up adding to the
11551 * end. This is easy since the struct is either aligned to 4
11552 * bytes or 2 bytes off.
11554 req_out->list_of_streams[number_entries] = 0;
11556 /* now fix the chunk length */
11557 ch->chunk_length = htons(len + old_len);
11558 chk->book_size = len + old_len;
11559 chk->book_size_scale = 0;
11560 chk->send_size = SCTP_SIZE32(chk->book_size);
11561 SCTP_BUF_LEN(chk->data) = chk->send_size;
11567 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11568 int number_entries, uint16_t * list,
11571 int len, old_len, i;
11572 struct sctp_stream_reset_in_request *req_in;
11573 struct sctp_chunkhdr *ch;
11575 ch = mtod(chk->data, struct sctp_chunkhdr *);
11578 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11580 /* get to new offset for the param. */
11581 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11582 /* now how long will this param be? */
11583 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11584 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11585 req_in->ph.param_length = htons(len);
11586 req_in->request_seq = htonl(seq);
11587 if (number_entries) {
11588 for (i = 0; i < number_entries; i++) {
11589 req_in->list_of_streams[i] = htons(list[i]);
11592 if (SCTP_SIZE32(len) > len) {
11594 * Need to worry about the pad we may end up adding to the
11595 * end. This is easy since the struct is either aligned to 4
11596 * bytes or 2 bytes off.
11598 req_in->list_of_streams[number_entries] = 0;
11600 /* now fix the chunk length */
11601 ch->chunk_length = htons(len + old_len);
11602 chk->book_size = len + old_len;
11603 chk->book_size_scale = 0;
11604 chk->send_size = SCTP_SIZE32(chk->book_size);
11605 SCTP_BUF_LEN(chk->data) = chk->send_size;
11611 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11615 struct sctp_stream_reset_tsn_request *req_tsn;
11616 struct sctp_chunkhdr *ch;
11618 ch = mtod(chk->data, struct sctp_chunkhdr *);
11621 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11623 /* get to new offset for the param. */
11624 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11625 /* now how long will this param be? */
11626 len = sizeof(struct sctp_stream_reset_tsn_request);
11627 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11628 req_tsn->ph.param_length = htons(len);
11629 req_tsn->request_seq = htonl(seq);
11631 /* now fix the chunk length */
11632 ch->chunk_length = htons(len + old_len);
11633 chk->send_size = len + old_len;
11634 chk->book_size = SCTP_SIZE32(chk->send_size);
11635 chk->book_size_scale = 0;
11636 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11641 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11642 uint32_t resp_seq, uint32_t result)
11645 struct sctp_stream_reset_response *resp;
11646 struct sctp_chunkhdr *ch;
11648 ch = mtod(chk->data, struct sctp_chunkhdr *);
11651 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11653 /* get to new offset for the param. */
11654 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11655 /* now how long will this param be? */
11656 len = sizeof(struct sctp_stream_reset_response);
11657 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11658 resp->ph.param_length = htons(len);
11659 resp->response_seq = htonl(resp_seq);
11660 resp->result = ntohl(result);
11662 /* now fix the chunk length */
11663 ch->chunk_length = htons(len + old_len);
11664 chk->book_size = len + old_len;
11665 chk->book_size_scale = 0;
11666 chk->send_size = SCTP_SIZE32(chk->book_size);
11667 SCTP_BUF_LEN(chk->data) = chk->send_size;
11674 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11675 uint32_t resp_seq, uint32_t result,
11676 uint32_t send_una, uint32_t recv_next)
11679 struct sctp_stream_reset_response_tsn *resp;
11680 struct sctp_chunkhdr *ch;
11682 ch = mtod(chk->data, struct sctp_chunkhdr *);
11685 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11687 /* get to new offset for the param. */
11688 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11689 /* now how long will this param be? */
11690 len = sizeof(struct sctp_stream_reset_response_tsn);
11691 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11692 resp->ph.param_length = htons(len);
11693 resp->response_seq = htonl(resp_seq);
11694 resp->result = htonl(result);
11695 resp->senders_next_tsn = htonl(send_una);
11696 resp->receivers_next_tsn = htonl(recv_next);
11698 /* now fix the chunk length */
11699 ch->chunk_length = htons(len + old_len);
11700 chk->book_size = len + old_len;
11701 chk->send_size = SCTP_SIZE32(chk->book_size);
11702 chk->book_size_scale = 0;
11703 SCTP_BUF_LEN(chk->data) = chk->send_size;
11708 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11713 struct sctp_chunkhdr *ch;
11714 struct sctp_stream_reset_add_strm *addstr;
11716 ch = mtod(chk->data, struct sctp_chunkhdr *);
11717 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11719 /* get to new offset for the param. */
11720 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11721 /* now how long will this param be? */
11722 len = sizeof(struct sctp_stream_reset_add_strm);
11725 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11726 addstr->ph.param_length = htons(len);
11727 addstr->request_seq = htonl(seq);
11728 addstr->number_of_streams = htons(adding);
11729 addstr->reserved = 0;
11731 /* now fix the chunk length */
11732 ch->chunk_length = htons(len + old_len);
11733 chk->send_size = len + old_len;
11734 chk->book_size = SCTP_SIZE32(chk->send_size);
11735 chk->book_size_scale = 0;
11736 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11741 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11746 struct sctp_chunkhdr *ch;
11747 struct sctp_stream_reset_add_strm *addstr;
11749 ch = mtod(chk->data, struct sctp_chunkhdr *);
11750 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11752 /* get to new offset for the param. */
11753 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11754 /* now how long will this param be? */
11755 len = sizeof(struct sctp_stream_reset_add_strm);
11757 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11758 addstr->ph.param_length = htons(len);
11759 addstr->request_seq = htonl(seq);
11760 addstr->number_of_streams = htons(adding);
11761 addstr->reserved = 0;
11763 /* now fix the chunk length */
11764 ch->chunk_length = htons(len + old_len);
11765 chk->send_size = len + old_len;
11766 chk->book_size = SCTP_SIZE32(chk->send_size);
11767 chk->book_size_scale = 0;
11768 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11775 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11776 int number_entries, uint16_t * list,
11777 uint8_t send_out_req,
11778 uint8_t send_in_req,
11779 uint8_t send_tsn_req,
11780 uint8_t add_stream,
11782 uint16_t adding_i, uint8_t peer_asked
11786 struct sctp_association *asoc;
11787 struct sctp_tmit_chunk *chk;
11788 struct sctp_chunkhdr *ch;
11791 asoc = &stcb->asoc;
11792 if (asoc->stream_reset_outstanding) {
11794 * Already one pending, must get ACK back to clear the flag.
11796 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11799 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11800 (add_stream == 0)) {
11801 /* nothing to do */
11802 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11805 if (send_tsn_req && (send_out_req || send_in_req)) {
11806 /* error, can't do that */
11807 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11810 sctp_alloc_a_chunk(stcb, chk);
11812 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11815 chk->copy_by_ref = 0;
11816 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11817 chk->rec.chunk_id.can_take_data = 0;
11818 chk->asoc = &stcb->asoc;
11819 chk->book_size = sizeof(struct sctp_chunkhdr);
11820 chk->send_size = SCTP_SIZE32(chk->book_size);
11821 chk->book_size_scale = 0;
11823 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11824 if (chk->data == NULL) {
11825 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11826 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11829 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11831 /* setup chunk parameters */
11832 chk->sent = SCTP_DATAGRAM_UNSENT;
11833 chk->snd_count = 0;
11834 if (stcb->asoc.alternate) {
11835 chk->whoTo = stcb->asoc.alternate;
11837 chk->whoTo = stcb->asoc.primary_destination;
11839 atomic_add_int(&chk->whoTo->ref_count, 1);
11840 ch = mtod(chk->data, struct sctp_chunkhdr *);
11841 ch->chunk_type = SCTP_STREAM_RESET;
11842 ch->chunk_flags = 0;
11843 ch->chunk_length = htons(chk->book_size);
11844 SCTP_BUF_LEN(chk->data) = chk->send_size;
11846 seq = stcb->asoc.str_reset_seq_out;
11847 if (send_out_req) {
11848 sctp_add_stream_reset_out(chk, number_entries, list,
11849 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
11850 asoc->stream_reset_out_is_outstanding = 1;
11852 asoc->stream_reset_outstanding++;
11854 if ((add_stream & 1) &&
11855 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
11856 /* Need to allocate more */
11857 struct sctp_stream_out *oldstream;
11858 struct sctp_stream_queue_pending *sp, *nsp;
11861 oldstream = stcb->asoc.strmout;
11862 /* get some more */
11863 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
11864 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)),
11866 if (stcb->asoc.strmout == NULL) {
11869 stcb->asoc.strmout = oldstream;
11870 /* Turn off the bit */
11871 x = add_stream & 0xfe;
11876 * Ok now we proceed with copying the old out stuff and
11877 * initializing the new stuff.
11879 SCTP_TCB_SEND_LOCK(stcb);
11880 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
11881 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11882 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11883 stcb->asoc.strmout[i].next_sequence_sent = oldstream[i].next_sequence_sent;
11884 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
11885 stcb->asoc.strmout[i].stream_no = i;
11886 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
11887 /* now anything on those queues? */
11888 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
11889 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
11890 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
11892 /* Now move assoc pointers too */
11893 if (stcb->asoc.last_out_stream == &oldstream[i]) {
11894 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
11896 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
11897 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
11900 /* now the new streams */
11901 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
11902 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
11903 stcb->asoc.strmout[i].next_sequence_sent = 0x0;
11904 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11905 stcb->asoc.strmout[i].stream_no = i;
11906 stcb->asoc.strmout[i].last_msg_incomplete = 0;
11907 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
11909 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
11910 SCTP_FREE(oldstream, SCTP_M_STRMO);
11911 SCTP_TCB_SEND_UNLOCK(stcb);
11914 if ((add_stream & 1) && (adding_o > 0)) {
11915 asoc->strm_pending_add_size = adding_o;
11916 asoc->peer_req_out = peer_asked;
11917 sctp_add_an_out_stream(chk, seq, adding_o);
11919 asoc->stream_reset_outstanding++;
11921 if ((add_stream & 2) && (adding_i > 0)) {
11922 sctp_add_an_in_stream(chk, seq, adding_i);
11924 asoc->stream_reset_outstanding++;
11927 sctp_add_stream_reset_in(chk, number_entries, list, seq);
11929 asoc->stream_reset_outstanding++;
11931 if (send_tsn_req) {
11932 sctp_add_stream_reset_tsn(chk, seq);
11933 asoc->stream_reset_outstanding++;
11935 asoc->str_reset = chk;
11936 /* insert the chunk for sending */
11937 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11940 asoc->ctrl_queue_cnt++;
11941 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11946 sctp_send_abort(struct mbuf *m, int iphlen, struct sctphdr *sh, uint32_t vtag,
11947 struct mbuf *cause, uint32_t vrf_id, uint16_t port)
11949 /* Don't respond to an ABORT with an ABORT. */
11950 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
11952 sctp_m_freem(cause);
11955 sctp_send_resp_msg(m, sh, vtag, SCTP_ABORT_ASSOCIATION, cause, vrf_id, port);
11960 sctp_send_operr_to(struct mbuf *m, struct sctphdr *sh, uint32_t vtag,
11961 struct mbuf *cause, uint32_t vrf_id, uint16_t port)
11963 sctp_send_resp_msg(m, sh, vtag, SCTP_OPERATION_ERROR, cause, vrf_id, port);
11967 static struct mbuf *
11968 sctp_copy_resume(struct uio *uio,
11970 int user_marks_eor,
11973 struct mbuf **new_tail)
11977 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
11978 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
11980 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11983 *sndout = m_length(m, NULL);
11984 *new_tail = m_last(m);
11990 sctp_copy_one(struct sctp_stream_queue_pending *sp,
11997 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
11999 if (sp->data == NULL) {
12000 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12003 sp->tail_mbuf = m_last(sp->data);
12009 static struct sctp_stream_queue_pending *
12010 sctp_copy_it_in(struct sctp_tcb *stcb,
12011 struct sctp_association *asoc,
12012 struct sctp_sndrcvinfo *srcv,
12014 struct sctp_nets *net,
12016 int user_marks_eor,
12020 * This routine must be very careful in its work. Protocol
12021 * processing is up and running so care must be taken to spl...()
12022 * when you need to do something that may effect the stcb/asoc. The
12023 * sb is locked however. When data is copied the protocol processing
12024 * should be enabled since this is a slower operation...
12026 struct sctp_stream_queue_pending *sp = NULL;
12030 /* Now can we send this? */
12031 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12032 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12033 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12034 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12035 /* got data while shutting down */
12036 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12037 *error = ECONNRESET;
12040 sctp_alloc_a_strmoq(stcb, sp);
12042 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12047 sp->sender_all_done = 0;
12048 sp->sinfo_flags = srcv->sinfo_flags;
12049 sp->timetolive = srcv->sinfo_timetolive;
12050 sp->ppid = srcv->sinfo_ppid;
12051 sp->context = srcv->sinfo_context;
12053 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12055 sp->stream = srcv->sinfo_stream;
12056 sp->length = min(uio->uio_resid, max_send_len);
12057 if ((sp->length == (uint32_t) uio->uio_resid) &&
12058 ((user_marks_eor == 0) ||
12059 (srcv->sinfo_flags & SCTP_EOF) ||
12060 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12061 sp->msg_is_complete = 1;
12063 sp->msg_is_complete = 0;
12065 sp->sender_all_done = 0;
12066 sp->some_taken = 0;
12067 sp->put_last_out = 0;
12068 resv_in_first = sizeof(struct sctp_data_chunk);
12069 sp->data = sp->tail_mbuf = NULL;
12070 if (sp->length == 0) {
12074 if (srcv->sinfo_keynumber_valid) {
12075 sp->auth_keyid = srcv->sinfo_keynumber;
12077 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12079 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12080 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12081 sp->holds_key_ref = 1;
12083 *error = sctp_copy_one(sp, uio, resv_in_first);
12086 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12089 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12091 atomic_add_int(&sp->net->ref_count, 1);
12095 sctp_set_prsctp_policy(sp);
12103 sctp_sosend(struct socket *so,
12104 struct sockaddr *addr,
12107 struct mbuf *control,
12112 int error, use_sndinfo = 0;
12113 struct sctp_sndrcvinfo sndrcvninfo;
12114 struct sockaddr *addr_to_use;
12116 #if defined(INET) && defined(INET6)
12117 struct sockaddr_in sin;
12122 /* process cmsg snd/rcv info (maybe a assoc-id) */
12123 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12124 sizeof(sndrcvninfo))) {
12129 addr_to_use = addr;
12130 #if defined(INET) && defined(INET6)
12131 if ((addr) && (addr->sa_family == AF_INET6)) {
12132 struct sockaddr_in6 *sin6;
12134 sin6 = (struct sockaddr_in6 *)addr;
12135 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12136 in6_sin6_2_sin(&sin, sin6);
12137 addr_to_use = (struct sockaddr *)&sin;
12141 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12144 use_sndinfo ? &sndrcvninfo : NULL
12152 sctp_lower_sosend(struct socket *so,
12153 struct sockaddr *addr,
12155 struct mbuf *i_pak,
12156 struct mbuf *control,
12158 struct sctp_sndrcvinfo *srcv
12163 unsigned int sndlen = 0, max_len;
12165 struct mbuf *top = NULL;
12166 int queue_only = 0, queue_only_for_init = 0;
12167 int free_cnt_applied = 0;
12169 int now_filled = 0;
12170 unsigned int inqueue_bytes = 0;
12171 struct sctp_block_entry be;
12172 struct sctp_inpcb *inp;
12173 struct sctp_tcb *stcb = NULL;
12174 struct timeval now;
12175 struct sctp_nets *net;
12176 struct sctp_association *asoc;
12177 struct sctp_inpcb *t_inp;
12178 int user_marks_eor;
12179 int create_lock_applied = 0;
12180 int nagle_applies = 0;
12181 int some_on_control = 0;
12182 int got_all_of_the_send = 0;
12183 int hold_tcblock = 0;
12184 int non_blocking = 0;
12185 uint32_t local_add_more, local_soresv = 0;
12187 uint16_t sinfo_flags;
12188 sctp_assoc_t sinfo_assoc_id;
12195 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12197 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12200 SCTP_RELEASE_PKT(i_pak);
12204 if ((uio == NULL) && (i_pak == NULL)) {
12205 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12208 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12209 atomic_add_int(&inp->total_sends, 1);
12211 if (uio->uio_resid < 0) {
12212 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12215 sndlen = uio->uio_resid;
12217 top = SCTP_HEADER_TO_CHAIN(i_pak);
12218 sndlen = SCTP_HEADER_LEN(i_pak);
12220 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12223 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12224 (inp->sctp_socket->so_qlimit)) {
12225 /* The listener can NOT send */
12226 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12231 * Pre-screen address, if one is given the sin-len
12232 * must be set correctly!
12235 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12237 switch (raddr->sa.sa_family) {
12240 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12241 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12245 port = raddr->sin.sin_port;
12250 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12251 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12255 port = raddr->sin6.sin6_port;
12259 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12260 error = EAFNOSUPPORT;
12267 sinfo_flags = srcv->sinfo_flags;
12268 sinfo_assoc_id = srcv->sinfo_assoc_id;
12269 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12270 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12271 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12275 if (srcv->sinfo_flags)
12276 SCTP_STAT_INCR(sctps_sends_with_flags);
12278 sinfo_flags = inp->def_send.sinfo_flags;
12279 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12281 if (sinfo_flags & SCTP_SENDALL) {
12282 /* its a sendall */
12283 error = sctp_sendall(inp, uio, top, srcv);
12287 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12288 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12292 /* now we must find the assoc */
12293 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12294 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12295 SCTP_INP_RLOCK(inp);
12296 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12298 SCTP_TCB_LOCK(stcb);
12301 SCTP_INP_RUNLOCK(inp);
12302 } else if (sinfo_assoc_id) {
12303 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12306 * Since we did not use findep we must
12307 * increment it, and if we don't find a tcb
12310 SCTP_INP_WLOCK(inp);
12311 SCTP_INP_INCR_REF(inp);
12312 SCTP_INP_WUNLOCK(inp);
12313 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12314 if (stcb == NULL) {
12315 SCTP_INP_WLOCK(inp);
12316 SCTP_INP_DECR_REF(inp);
12317 SCTP_INP_WUNLOCK(inp);
12322 if ((stcb == NULL) && (addr)) {
12323 /* Possible implicit send? */
12324 SCTP_ASOC_CREATE_LOCK(inp);
12325 create_lock_applied = 1;
12326 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12327 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12328 /* Should I really unlock ? */
12329 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12334 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12335 (addr->sa_family == AF_INET6)) {
12336 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12340 SCTP_INP_WLOCK(inp);
12341 SCTP_INP_INCR_REF(inp);
12342 SCTP_INP_WUNLOCK(inp);
12343 /* With the lock applied look again */
12344 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12345 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12346 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12348 if (stcb == NULL) {
12349 SCTP_INP_WLOCK(inp);
12350 SCTP_INP_DECR_REF(inp);
12351 SCTP_INP_WUNLOCK(inp);
12358 if (t_inp != inp) {
12359 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12364 if (stcb == NULL) {
12365 if (addr == NULL) {
12366 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12370 /* We must go ahead and start the INIT process */
12373 if ((sinfo_flags & SCTP_ABORT) ||
12374 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12376 * User asks to abort a non-existant assoc,
12377 * or EOF a non-existant assoc with no data
12379 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12383 /* get an asoc/stcb struct */
12384 vrf_id = inp->def_vrf_id;
12386 if (create_lock_applied == 0) {
12387 panic("Error, should hold create lock and I don't?");
12390 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12393 if (stcb == NULL) {
12394 /* Error is setup for us in the call */
12397 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12398 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12400 * Set the connected flag so we can queue
12403 soisconnecting(so);
12406 if (create_lock_applied) {
12407 SCTP_ASOC_CREATE_UNLOCK(inp);
12408 create_lock_applied = 0;
12410 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12413 * Turn on queue only flag to prevent data from
12417 asoc = &stcb->asoc;
12418 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12419 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12421 /* initialize authentication params for the assoc */
12422 sctp_initialize_auth_params(inp, stcb);
12425 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12426 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7);
12432 /* out with the INIT */
12433 queue_only_for_init = 1;
12435 * we may want to dig in after this call and adjust the MTU
12436 * value. It defaulted to 1500 (constant) but the ro
12437 * structure may now have an update and thus we may need to
12438 * change it BEFORE we append the message.
12442 asoc = &stcb->asoc;
12444 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12445 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12447 net = sctp_findnet(stcb, addr);
12450 if ((net == NULL) ||
12451 ((port != 0) && (port != stcb->rport))) {
12452 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12457 if (stcb->asoc.alternate) {
12458 net = stcb->asoc.alternate;
12460 net = stcb->asoc.primary_destination;
12463 atomic_add_int(&stcb->total_sends, 1);
12464 /* Keep the stcb from being freed under our feet */
12465 atomic_add_int(&asoc->refcnt, 1);
12466 free_cnt_applied = 1;
12468 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12469 if (sndlen > asoc->smallest_mtu) {
12470 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12475 if (SCTP_SO_IS_NBIO(so)
12476 || (flags & MSG_NBIO)
12480 /* would we block? */
12481 if (non_blocking) {
12482 if (hold_tcblock == 0) {
12483 SCTP_TCB_LOCK(stcb);
12486 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12487 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12488 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12489 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12490 if (sndlen > SCTP_SB_LIMIT_SND(so))
12493 error = EWOULDBLOCK;
12496 stcb->asoc.sb_send_resv += sndlen;
12497 SCTP_TCB_UNLOCK(stcb);
12500 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12502 local_soresv = sndlen;
12503 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12504 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12505 error = ECONNRESET;
12508 if (create_lock_applied) {
12509 SCTP_ASOC_CREATE_UNLOCK(inp);
12510 create_lock_applied = 0;
12512 if (asoc->stream_reset_outstanding) {
12514 * Can't queue any data while stream reset is underway.
12516 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
12520 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12521 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12524 /* we are now done with all control */
12526 sctp_m_freem(control);
12529 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12530 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12531 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12532 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12533 if (srcv->sinfo_flags & SCTP_ABORT) {
12536 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12537 error = ECONNRESET;
12541 /* Ok, we will attempt a msgsnd :> */
12543 p->td_ru.ru_msgsnd++;
12545 /* Are we aborting? */
12546 if (srcv->sinfo_flags & SCTP_ABORT) {
12548 int tot_demand, tot_out = 0, max_out;
12550 SCTP_STAT_INCR(sctps_sends_with_abort);
12551 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12552 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12553 /* It has to be up before we abort */
12554 /* how big is the user initiated abort? */
12555 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12559 if (hold_tcblock) {
12560 SCTP_TCB_UNLOCK(stcb);
12564 struct mbuf *cntm = NULL;
12566 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAIT, 1, MT_DATA);
12568 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12569 tot_out += SCTP_BUF_LEN(cntm);
12573 /* Must fit in a MTU */
12575 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12576 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12578 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12582 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAIT, 1, MT_DATA);
12585 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12589 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12590 max_out -= sizeof(struct sctp_abort_msg);
12591 if (tot_out > max_out) {
12595 struct sctp_paramhdr *ph;
12597 /* now move forward the data pointer */
12598 ph = mtod(mm, struct sctp_paramhdr *);
12599 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12600 ph->param_length = htons((sizeof(struct sctp_paramhdr) + tot_out));
12602 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12604 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12607 * Here if we can't get his data we
12608 * still abort we just don't get to
12609 * send the users note :-0
12616 SCTP_BUF_NEXT(mm) = top;
12620 if (hold_tcblock == 0) {
12621 SCTP_TCB_LOCK(stcb);
12623 atomic_add_int(&stcb->asoc.refcnt, -1);
12624 free_cnt_applied = 0;
12625 /* release this lock, otherwise we hang on ourselves */
12626 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12627 /* now relock the stcb so everything is sane */
12631 * In this case top is already chained to mm avoid double
12632 * free, since we free it below if top != NULL and driver
12633 * would free it after sending the packet out
12640 /* Calculate the maximum we can send */
12641 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12642 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12643 if (non_blocking) {
12644 /* we already checked for non-blocking above. */
12647 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12652 if (hold_tcblock) {
12653 SCTP_TCB_UNLOCK(stcb);
12656 /* Is the stream no. valid? */
12657 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12658 /* Invalid stream number */
12659 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12663 if (asoc->strmout == NULL) {
12664 /* huh? software error */
12665 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12669 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12670 if ((user_marks_eor == 0) &&
12671 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12672 /* It will NEVER fit */
12673 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12677 if ((uio == NULL) && user_marks_eor) {
12679 * We do not support eeor mode for
12680 * sending with mbuf chains (like sendfile).
12682 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12686 if (user_marks_eor) {
12687 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12690 * For non-eeor the whole message must fit in
12691 * the socket send buffer.
12693 local_add_more = sndlen;
12696 if (non_blocking) {
12697 goto skip_preblock;
12699 if (((max_len <= local_add_more) &&
12700 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12702 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12703 /* No room right now ! */
12704 SOCKBUF_LOCK(&so->so_snd);
12705 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12706 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12707 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12708 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12709 (unsigned int)SCTP_SB_LIMIT_SND(so),
12712 stcb->asoc.stream_queue_cnt,
12713 stcb->asoc.chunks_on_out_queue,
12714 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12715 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12716 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
12719 stcb->block_entry = &be;
12720 error = sbwait(&so->so_snd);
12721 stcb->block_entry = NULL;
12722 if (error || so->so_error || be.error) {
12725 error = so->so_error;
12730 SOCKBUF_UNLOCK(&so->so_snd);
12733 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12734 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12735 asoc, stcb->asoc.total_output_queue_size);
12737 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12740 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12742 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12743 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12747 SOCKBUF_UNLOCK(&so->so_snd);
12750 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12754 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
12755 * case NOTE: uio will be null when top/mbuf is passed
12758 if (srcv->sinfo_flags & SCTP_EOF) {
12759 got_all_of_the_send = 1;
12762 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12768 struct sctp_stream_queue_pending *sp;
12769 struct sctp_stream_out *strm;
12772 SCTP_TCB_SEND_LOCK(stcb);
12773 if ((asoc->stream_locked) &&
12774 (asoc->stream_locked_on != srcv->sinfo_stream)) {
12775 SCTP_TCB_SEND_UNLOCK(stcb);
12776 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12780 SCTP_TCB_SEND_UNLOCK(stcb);
12782 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
12783 if (strm->last_msg_incomplete == 0) {
12785 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
12786 if ((sp == NULL) || (error)) {
12789 SCTP_TCB_SEND_LOCK(stcb);
12790 if (sp->msg_is_complete) {
12791 strm->last_msg_incomplete = 0;
12792 asoc->stream_locked = 0;
12795 * Just got locked to this guy in case of an
12798 strm->last_msg_incomplete = 1;
12799 asoc->stream_locked = 1;
12800 asoc->stream_locked_on = srcv->sinfo_stream;
12801 sp->sender_all_done = 0;
12803 sctp_snd_sb_alloc(stcb, sp->length);
12804 atomic_add_int(&asoc->stream_queue_cnt, 1);
12805 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
12806 sp->strseq = strm->next_sequence_sent;
12807 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_SCTP) {
12808 sctp_misc_ints(SCTP_STRMOUT_LOG_ASSIGN,
12809 (uintptr_t) stcb, sp->length,
12810 (uint32_t) ((srcv->sinfo_stream << 16) | sp->strseq), 0);
12812 strm->next_sequence_sent++;
12814 SCTP_STAT_INCR(sctps_sends_with_unord);
12816 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
12817 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
12818 SCTP_TCB_SEND_UNLOCK(stcb);
12820 SCTP_TCB_SEND_LOCK(stcb);
12821 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
12822 SCTP_TCB_SEND_UNLOCK(stcb);
12824 /* ???? Huh ??? last msg is gone */
12826 panic("Warning: Last msg marked incomplete, yet nothing left?");
12828 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
12829 strm->last_msg_incomplete = 0;
12835 while (uio->uio_resid > 0) {
12836 /* How much room do we have? */
12837 struct mbuf *new_tail, *mm;
12839 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12840 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
12844 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
12845 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
12846 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
12849 if (hold_tcblock) {
12850 SCTP_TCB_UNLOCK(stcb);
12853 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
12854 if ((mm == NULL) || error) {
12860 /* Update the mbuf and count */
12861 SCTP_TCB_SEND_LOCK(stcb);
12862 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12864 * we need to get out. Peer probably
12868 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
12869 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12870 error = ECONNRESET;
12872 SCTP_TCB_SEND_UNLOCK(stcb);
12875 if (sp->tail_mbuf) {
12876 /* tack it to the end */
12877 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
12878 sp->tail_mbuf = new_tail;
12880 /* A stolen mbuf */
12882 sp->tail_mbuf = new_tail;
12884 sctp_snd_sb_alloc(stcb, sndout);
12885 atomic_add_int(&sp->length, sndout);
12888 /* Did we reach EOR? */
12889 if ((uio->uio_resid == 0) &&
12890 ((user_marks_eor == 0) ||
12891 (srcv->sinfo_flags & SCTP_EOF) ||
12892 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12893 sp->msg_is_complete = 1;
12895 sp->msg_is_complete = 0;
12897 SCTP_TCB_SEND_UNLOCK(stcb);
12899 if (uio->uio_resid == 0) {
12904 if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
12906 * This is ugly but we must assure locking
12909 if (hold_tcblock == 0) {
12910 SCTP_TCB_LOCK(stcb);
12913 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
12914 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12915 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12916 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12922 SCTP_TCB_UNLOCK(stcb);
12925 /* wait for space now */
12926 if (non_blocking) {
12927 /* Non-blocking io in place out */
12930 /* What about the INIT, send it maybe */
12931 if (queue_only_for_init) {
12932 if (hold_tcblock == 0) {
12933 SCTP_TCB_LOCK(stcb);
12936 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
12937 /* a collision took us forward? */
12940 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
12941 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12945 if ((net->flight_size > net->cwnd) &&
12946 (asoc->sctp_cmt_on_off == 0)) {
12947 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
12949 } else if (asoc->ifp_had_enobuf) {
12950 SCTP_STAT_INCR(sctps_ifnomemqueued);
12951 if (net->flight_size > (2 * net->mtu)) {
12954 asoc->ifp_had_enobuf = 0;
12956 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
12957 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
12958 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
12959 (stcb->asoc.total_flight > 0) &&
12960 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
12961 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
12964 * Ok, Nagle is set on and we have data outstanding.
12965 * Don't send anything and let SACKs drive out the
12966 * data unless wen have a "full" segment to send.
12968 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12969 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
12971 SCTP_STAT_INCR(sctps_naglequeued);
12974 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12975 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
12976 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
12978 SCTP_STAT_INCR(sctps_naglesent);
12981 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12983 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
12984 nagle_applies, un_sent);
12985 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
12986 stcb->asoc.total_flight,
12987 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
12989 if (queue_only_for_init)
12990 queue_only_for_init = 0;
12991 if ((queue_only == 0) && (nagle_applies == 0)) {
12993 * need to start chunk output
12994 * before blocking.. note that if
12995 * a lock is already applied, then
12996 * the input via the net is happening
12997 * and I don't need to start output :-D
12999 if (hold_tcblock == 0) {
13000 if (SCTP_TCB_TRYLOCK(stcb)) {
13002 sctp_chunk_output(inp,
13004 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13007 sctp_chunk_output(inp,
13009 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13011 if (hold_tcblock == 1) {
13012 SCTP_TCB_UNLOCK(stcb);
13016 SOCKBUF_LOCK(&so->so_snd);
13018 * This is a bit strange, but I think it will
13019 * work. The total_output_queue_size is locked and
13020 * protected by the TCB_LOCK, which we just released.
13021 * There is a race that can occur between releasing it
13022 * above, and me getting the socket lock, where sacks
13023 * come in but we have not put the SB_WAIT on the
13024 * so_snd buffer to get the wakeup. After the LOCK
13025 * is applied the sack_processing will also need to
13026 * LOCK the so->so_snd to do the actual sowwakeup(). So
13027 * once we have the socket buffer lock if we recheck the
13028 * size we KNOW we will get to sleep safely with the
13029 * wakeup flag in place.
13031 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13032 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13033 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13034 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13035 asoc, uio->uio_resid);
13038 stcb->block_entry = &be;
13039 error = sbwait(&so->so_snd);
13040 stcb->block_entry = NULL;
13042 if (error || so->so_error || be.error) {
13045 error = so->so_error;
13050 SOCKBUF_UNLOCK(&so->so_snd);
13053 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13054 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13055 asoc, stcb->asoc.total_output_queue_size);
13058 SOCKBUF_UNLOCK(&so->so_snd);
13059 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13063 SCTP_TCB_SEND_LOCK(stcb);
13065 if (sp->msg_is_complete == 0) {
13066 strm->last_msg_incomplete = 1;
13067 asoc->stream_locked = 1;
13068 asoc->stream_locked_on = srcv->sinfo_stream;
13070 sp->sender_all_done = 1;
13071 strm->last_msg_incomplete = 0;
13072 asoc->stream_locked = 0;
13075 SCTP_PRINTF("Huh no sp TSNH?\n");
13076 strm->last_msg_incomplete = 0;
13077 asoc->stream_locked = 0;
13079 SCTP_TCB_SEND_UNLOCK(stcb);
13080 if (uio->uio_resid == 0) {
13081 got_all_of_the_send = 1;
13084 /* We send in a 0, since we do NOT have any locks */
13085 error = sctp_msg_append(stcb, net, top, srcv, 0);
13087 if (srcv->sinfo_flags & SCTP_EOF) {
13089 * This should only happen for Panda for the mbuf
13090 * send case, which does NOT yet support EEOR mode.
13091 * Thus, we can just set this flag to do the proper
13094 got_all_of_the_send = 1;
13102 if ((srcv->sinfo_flags & SCTP_EOF) &&
13103 (got_all_of_the_send == 1)) {
13106 SCTP_STAT_INCR(sctps_sends_with_eof);
13108 if (hold_tcblock == 0) {
13109 SCTP_TCB_LOCK(stcb);
13112 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13113 if (TAILQ_EMPTY(&asoc->send_queue) &&
13114 TAILQ_EMPTY(&asoc->sent_queue) &&
13116 if (asoc->locked_on_sending) {
13119 /* there is nothing queued to send, so I'm done... */
13120 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13121 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13122 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13123 struct sctp_nets *netp;
13125 if (stcb->asoc.alternate) {
13126 netp = stcb->asoc.alternate;
13128 netp = stcb->asoc.primary_destination;
13130 /* only send SHUTDOWN the first time through */
13131 sctp_send_shutdown(stcb, netp);
13132 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13133 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13135 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13136 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13137 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13139 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13140 asoc->primary_destination);
13144 * we still got (or just got) data to send, so set
13148 * XXX sockets draft says that SCTP_EOF should be
13149 * sent with no data. currently, we will allow user
13150 * data to be sent first and move to
13153 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13154 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13155 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13156 if (hold_tcblock == 0) {
13157 SCTP_TCB_LOCK(stcb);
13160 if (asoc->locked_on_sending) {
13161 /* Locked to send out the data */
13162 struct sctp_stream_queue_pending *sp;
13164 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13166 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13167 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13170 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13171 if (TAILQ_EMPTY(&asoc->send_queue) &&
13172 TAILQ_EMPTY(&asoc->sent_queue) &&
13173 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13175 if (free_cnt_applied) {
13176 atomic_add_int(&stcb->asoc.refcnt, -1);
13177 free_cnt_applied = 0;
13179 sctp_abort_an_association(stcb->sctp_ep, stcb,
13180 NULL, SCTP_SO_LOCKED);
13182 * now relock the stcb so everything
13189 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13190 asoc->primary_destination);
13191 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13196 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13197 some_on_control = 1;
13199 if (queue_only_for_init) {
13200 if (hold_tcblock == 0) {
13201 SCTP_TCB_LOCK(stcb);
13204 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13205 /* a collision took us forward? */
13208 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13209 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13213 if ((net->flight_size > net->cwnd) &&
13214 (stcb->asoc.sctp_cmt_on_off == 0)) {
13215 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13217 } else if (asoc->ifp_had_enobuf) {
13218 SCTP_STAT_INCR(sctps_ifnomemqueued);
13219 if (net->flight_size > (2 * net->mtu)) {
13222 asoc->ifp_had_enobuf = 0;
13224 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13225 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13226 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13227 (stcb->asoc.total_flight > 0) &&
13228 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13229 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13231 * Ok, Nagle is set on and we have data outstanding.
13232 * Don't send anything and let SACKs drive out the
13233 * data unless wen have a "full" segment to send.
13235 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13236 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13238 SCTP_STAT_INCR(sctps_naglequeued);
13241 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13242 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13243 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13245 SCTP_STAT_INCR(sctps_naglesent);
13248 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13249 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13250 nagle_applies, un_sent);
13251 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13252 stcb->asoc.total_flight,
13253 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13255 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13256 /* we can attempt to send too. */
13257 if (hold_tcblock == 0) {
13259 * If there is activity recv'ing sacks no need to
13262 if (SCTP_TCB_TRYLOCK(stcb)) {
13263 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13267 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13269 } else if ((queue_only == 0) &&
13270 (stcb->asoc.peers_rwnd == 0) &&
13271 (stcb->asoc.total_flight == 0)) {
13272 /* We get to have a probe outstanding */
13273 if (hold_tcblock == 0) {
13275 SCTP_TCB_LOCK(stcb);
13277 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13278 } else if (some_on_control) {
13279 int num_out, reason, frag_point;
13281 /* Here we do control only */
13282 if (hold_tcblock == 0) {
13284 SCTP_TCB_LOCK(stcb);
13286 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13287 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13288 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13290 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13291 queue_only, stcb->asoc.peers_rwnd, un_sent,
13292 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13293 stcb->asoc.total_output_queue_size, error);
13298 if (local_soresv && stcb) {
13299 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13301 if (create_lock_applied) {
13302 SCTP_ASOC_CREATE_UNLOCK(inp);
13304 if ((stcb) && hold_tcblock) {
13305 SCTP_TCB_UNLOCK(stcb);
13307 if (stcb && free_cnt_applied) {
13308 atomic_add_int(&stcb->asoc.refcnt, -1);
13312 if (mtx_owned(&stcb->tcb_mtx)) {
13313 panic("Leaving with tcb mtx owned?");
13315 if (mtx_owned(&stcb->tcb_send_mtx)) {
13316 panic("Leaving with tcb send mtx owned?");
13322 sctp_validate_no_locks(inp);
13324 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
13331 sctp_m_freem(control);
13338 * generate an AUTHentication chunk, if required
13341 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13342 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13343 struct sctp_tcb *stcb, uint8_t chunk)
13345 struct mbuf *m_auth;
13346 struct sctp_auth_chunk *auth;
13350 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13354 /* sysctl disabled auth? */
13355 if (SCTP_BASE_SYSCTL(sctp_auth_disable))
13358 /* peer doesn't do auth... */
13359 if (!stcb->asoc.peer_supports_auth) {
13362 /* does the requested chunk require auth? */
13363 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13366 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_DONTWAIT, 1, MT_HEADER);
13367 if (m_auth == NULL) {
13371 /* reserve some space if this will be the first mbuf */
13373 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13374 /* fill in the AUTH chunk details */
13375 auth = mtod(m_auth, struct sctp_auth_chunk *);
13376 bzero(auth, sizeof(*auth));
13377 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13378 auth->ch.chunk_flags = 0;
13379 chunk_len = sizeof(*auth) +
13380 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13381 auth->ch.chunk_length = htons(chunk_len);
13382 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13383 /* key id and hmac digest will be computed and filled in upon send */
13385 /* save the offset where the auth was inserted into the chain */
13387 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13388 *offset += SCTP_BUF_LEN(cn);
13391 /* update length and return pointer to the auth chunk */
13392 SCTP_BUF_LEN(m_auth) = chunk_len;
13393 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13394 if (auth_ret != NULL)
13402 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13404 struct nd_prefix *pfx = NULL;
13405 struct nd_pfxrouter *pfxrtr = NULL;
13406 struct sockaddr_in6 gw6;
13408 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13411 /* get prefix entry of address */
13412 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13413 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13415 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13416 &src6->sin6_addr, &pfx->ndpr_mask))
13419 /* no prefix entry in the prefix list */
13421 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13422 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13425 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13426 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13428 /* search installed gateway from prefix entry */
13429 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13430 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13431 gw6.sin6_family = AF_INET6;
13432 gw6.sin6_len = sizeof(struct sockaddr_in6);
13433 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13434 sizeof(struct in6_addr));
13435 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13436 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13437 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13438 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13439 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13440 ro->ro_rt->rt_gateway)) {
13441 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13445 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13452 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13455 struct sockaddr_in *sin, *mask;
13456 struct ifaddr *ifa;
13457 struct in_addr srcnetaddr, gwnetaddr;
13459 if (ro == NULL || ro->ro_rt == NULL ||
13460 sifa->address.sa.sa_family != AF_INET) {
13463 ifa = (struct ifaddr *)sifa->ifa;
13464 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13465 sin = (struct sockaddr_in *)&sifa->address.sin;
13466 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13467 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13468 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13469 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13471 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13472 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13473 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13474 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13475 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13476 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {