2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <netinet/sctp_os.h>
38 #include <netinet/sctp_var.h>
39 #include <netinet/sctp_sysctl.h>
40 #include <netinet/sctp_header.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctputil.h>
43 #include <netinet/sctp_output.h>
44 #include <netinet/sctp_uio.h>
45 #include <netinet/sctputil.h>
46 #include <netinet/sctp_auth.h>
47 #include <netinet/sctp_timer.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_indata.h>
50 #include <netinet/sctp_bsd_addr.h>
51 #include <netinet/sctp_input.h>
52 #include <netinet/sctp_crc32.h>
53 #include <netinet/udp.h>
54 #include <netinet/udp_var.h>
55 #include <machine/in_cksum.h>
59 #define SCTP_MAX_GAPS_INARRAY 4
61 uint8_t right_edge; /* mergable on the right edge */
62 uint8_t left_edge; /* mergable on the left edge */
65 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
68 struct sack_track sack_array[256] = {
69 {0, 0, 0, 0, /* 0x00 */
76 {1, 0, 1, 0, /* 0x01 */
83 {0, 0, 1, 0, /* 0x02 */
90 {1, 0, 1, 0, /* 0x03 */
97 {0, 0, 1, 0, /* 0x04 */
104 {1, 0, 2, 0, /* 0x05 */
111 {0, 0, 1, 0, /* 0x06 */
118 {1, 0, 1, 0, /* 0x07 */
125 {0, 0, 1, 0, /* 0x08 */
132 {1, 0, 2, 0, /* 0x09 */
139 {0, 0, 2, 0, /* 0x0a */
146 {1, 0, 2, 0, /* 0x0b */
153 {0, 0, 1, 0, /* 0x0c */
160 {1, 0, 2, 0, /* 0x0d */
167 {0, 0, 1, 0, /* 0x0e */
174 {1, 0, 1, 0, /* 0x0f */
181 {0, 0, 1, 0, /* 0x10 */
188 {1, 0, 2, 0, /* 0x11 */
195 {0, 0, 2, 0, /* 0x12 */
202 {1, 0, 2, 0, /* 0x13 */
209 {0, 0, 2, 0, /* 0x14 */
216 {1, 0, 3, 0, /* 0x15 */
223 {0, 0, 2, 0, /* 0x16 */
230 {1, 0, 2, 0, /* 0x17 */
237 {0, 0, 1, 0, /* 0x18 */
244 {1, 0, 2, 0, /* 0x19 */
251 {0, 0, 2, 0, /* 0x1a */
258 {1, 0, 2, 0, /* 0x1b */
265 {0, 0, 1, 0, /* 0x1c */
272 {1, 0, 2, 0, /* 0x1d */
279 {0, 0, 1, 0, /* 0x1e */
286 {1, 0, 1, 0, /* 0x1f */
293 {0, 0, 1, 0, /* 0x20 */
300 {1, 0, 2, 0, /* 0x21 */
307 {0, 0, 2, 0, /* 0x22 */
314 {1, 0, 2, 0, /* 0x23 */
321 {0, 0, 2, 0, /* 0x24 */
328 {1, 0, 3, 0, /* 0x25 */
335 {0, 0, 2, 0, /* 0x26 */
342 {1, 0, 2, 0, /* 0x27 */
349 {0, 0, 2, 0, /* 0x28 */
356 {1, 0, 3, 0, /* 0x29 */
363 {0, 0, 3, 0, /* 0x2a */
370 {1, 0, 3, 0, /* 0x2b */
377 {0, 0, 2, 0, /* 0x2c */
384 {1, 0, 3, 0, /* 0x2d */
391 {0, 0, 2, 0, /* 0x2e */
398 {1, 0, 2, 0, /* 0x2f */
405 {0, 0, 1, 0, /* 0x30 */
412 {1, 0, 2, 0, /* 0x31 */
419 {0, 0, 2, 0, /* 0x32 */
426 {1, 0, 2, 0, /* 0x33 */
433 {0, 0, 2, 0, /* 0x34 */
440 {1, 0, 3, 0, /* 0x35 */
447 {0, 0, 2, 0, /* 0x36 */
454 {1, 0, 2, 0, /* 0x37 */
461 {0, 0, 1, 0, /* 0x38 */
468 {1, 0, 2, 0, /* 0x39 */
475 {0, 0, 2, 0, /* 0x3a */
482 {1, 0, 2, 0, /* 0x3b */
489 {0, 0, 1, 0, /* 0x3c */
496 {1, 0, 2, 0, /* 0x3d */
503 {0, 0, 1, 0, /* 0x3e */
510 {1, 0, 1, 0, /* 0x3f */
517 {0, 0, 1, 0, /* 0x40 */
524 {1, 0, 2, 0, /* 0x41 */
531 {0, 0, 2, 0, /* 0x42 */
538 {1, 0, 2, 0, /* 0x43 */
545 {0, 0, 2, 0, /* 0x44 */
552 {1, 0, 3, 0, /* 0x45 */
559 {0, 0, 2, 0, /* 0x46 */
566 {1, 0, 2, 0, /* 0x47 */
573 {0, 0, 2, 0, /* 0x48 */
580 {1, 0, 3, 0, /* 0x49 */
587 {0, 0, 3, 0, /* 0x4a */
594 {1, 0, 3, 0, /* 0x4b */
601 {0, 0, 2, 0, /* 0x4c */
608 {1, 0, 3, 0, /* 0x4d */
615 {0, 0, 2, 0, /* 0x4e */
622 {1, 0, 2, 0, /* 0x4f */
629 {0, 0, 2, 0, /* 0x50 */
636 {1, 0, 3, 0, /* 0x51 */
643 {0, 0, 3, 0, /* 0x52 */
650 {1, 0, 3, 0, /* 0x53 */
657 {0, 0, 3, 0, /* 0x54 */
664 {1, 0, 4, 0, /* 0x55 */
671 {0, 0, 3, 0, /* 0x56 */
678 {1, 0, 3, 0, /* 0x57 */
685 {0, 0, 2, 0, /* 0x58 */
692 {1, 0, 3, 0, /* 0x59 */
699 {0, 0, 3, 0, /* 0x5a */
706 {1, 0, 3, 0, /* 0x5b */
713 {0, 0, 2, 0, /* 0x5c */
720 {1, 0, 3, 0, /* 0x5d */
727 {0, 0, 2, 0, /* 0x5e */
734 {1, 0, 2, 0, /* 0x5f */
741 {0, 0, 1, 0, /* 0x60 */
748 {1, 0, 2, 0, /* 0x61 */
755 {0, 0, 2, 0, /* 0x62 */
762 {1, 0, 2, 0, /* 0x63 */
769 {0, 0, 2, 0, /* 0x64 */
776 {1, 0, 3, 0, /* 0x65 */
783 {0, 0, 2, 0, /* 0x66 */
790 {1, 0, 2, 0, /* 0x67 */
797 {0, 0, 2, 0, /* 0x68 */
804 {1, 0, 3, 0, /* 0x69 */
811 {0, 0, 3, 0, /* 0x6a */
818 {1, 0, 3, 0, /* 0x6b */
825 {0, 0, 2, 0, /* 0x6c */
832 {1, 0, 3, 0, /* 0x6d */
839 {0, 0, 2, 0, /* 0x6e */
846 {1, 0, 2, 0, /* 0x6f */
853 {0, 0, 1, 0, /* 0x70 */
860 {1, 0, 2, 0, /* 0x71 */
867 {0, 0, 2, 0, /* 0x72 */
874 {1, 0, 2, 0, /* 0x73 */
881 {0, 0, 2, 0, /* 0x74 */
888 {1, 0, 3, 0, /* 0x75 */
895 {0, 0, 2, 0, /* 0x76 */
902 {1, 0, 2, 0, /* 0x77 */
909 {0, 0, 1, 0, /* 0x78 */
916 {1, 0, 2, 0, /* 0x79 */
923 {0, 0, 2, 0, /* 0x7a */
930 {1, 0, 2, 0, /* 0x7b */
937 {0, 0, 1, 0, /* 0x7c */
944 {1, 0, 2, 0, /* 0x7d */
951 {0, 0, 1, 0, /* 0x7e */
958 {1, 0, 1, 0, /* 0x7f */
965 {0, 1, 1, 0, /* 0x80 */
972 {1, 1, 2, 0, /* 0x81 */
979 {0, 1, 2, 0, /* 0x82 */
986 {1, 1, 2, 0, /* 0x83 */
993 {0, 1, 2, 0, /* 0x84 */
1000 {1, 1, 3, 0, /* 0x85 */
1007 {0, 1, 2, 0, /* 0x86 */
1014 {1, 1, 2, 0, /* 0x87 */
1021 {0, 1, 2, 0, /* 0x88 */
1028 {1, 1, 3, 0, /* 0x89 */
1035 {0, 1, 3, 0, /* 0x8a */
1042 {1, 1, 3, 0, /* 0x8b */
1049 {0, 1, 2, 0, /* 0x8c */
1056 {1, 1, 3, 0, /* 0x8d */
1063 {0, 1, 2, 0, /* 0x8e */
1070 {1, 1, 2, 0, /* 0x8f */
1077 {0, 1, 2, 0, /* 0x90 */
1084 {1, 1, 3, 0, /* 0x91 */
1091 {0, 1, 3, 0, /* 0x92 */
1098 {1, 1, 3, 0, /* 0x93 */
1105 {0, 1, 3, 0, /* 0x94 */
1112 {1, 1, 4, 0, /* 0x95 */
1119 {0, 1, 3, 0, /* 0x96 */
1126 {1, 1, 3, 0, /* 0x97 */
1133 {0, 1, 2, 0, /* 0x98 */
1140 {1, 1, 3, 0, /* 0x99 */
1147 {0, 1, 3, 0, /* 0x9a */
1154 {1, 1, 3, 0, /* 0x9b */
1161 {0, 1, 2, 0, /* 0x9c */
1168 {1, 1, 3, 0, /* 0x9d */
1175 {0, 1, 2, 0, /* 0x9e */
1182 {1, 1, 2, 0, /* 0x9f */
1189 {0, 1, 2, 0, /* 0xa0 */
1196 {1, 1, 3, 0, /* 0xa1 */
1203 {0, 1, 3, 0, /* 0xa2 */
1210 {1, 1, 3, 0, /* 0xa3 */
1217 {0, 1, 3, 0, /* 0xa4 */
1224 {1, 1, 4, 0, /* 0xa5 */
1231 {0, 1, 3, 0, /* 0xa6 */
1238 {1, 1, 3, 0, /* 0xa7 */
1245 {0, 1, 3, 0, /* 0xa8 */
1252 {1, 1, 4, 0, /* 0xa9 */
1259 {0, 1, 4, 0, /* 0xaa */
1266 {1, 1, 4, 0, /* 0xab */
1273 {0, 1, 3, 0, /* 0xac */
1280 {1, 1, 4, 0, /* 0xad */
1287 {0, 1, 3, 0, /* 0xae */
1294 {1, 1, 3, 0, /* 0xaf */
1301 {0, 1, 2, 0, /* 0xb0 */
1308 {1, 1, 3, 0, /* 0xb1 */
1315 {0, 1, 3, 0, /* 0xb2 */
1322 {1, 1, 3, 0, /* 0xb3 */
1329 {0, 1, 3, 0, /* 0xb4 */
1336 {1, 1, 4, 0, /* 0xb5 */
1343 {0, 1, 3, 0, /* 0xb6 */
1350 {1, 1, 3, 0, /* 0xb7 */
1357 {0, 1, 2, 0, /* 0xb8 */
1364 {1, 1, 3, 0, /* 0xb9 */
1371 {0, 1, 3, 0, /* 0xba */
1378 {1, 1, 3, 0, /* 0xbb */
1385 {0, 1, 2, 0, /* 0xbc */
1392 {1, 1, 3, 0, /* 0xbd */
1399 {0, 1, 2, 0, /* 0xbe */
1406 {1, 1, 2, 0, /* 0xbf */
1413 {0, 1, 1, 0, /* 0xc0 */
1420 {1, 1, 2, 0, /* 0xc1 */
1427 {0, 1, 2, 0, /* 0xc2 */
1434 {1, 1, 2, 0, /* 0xc3 */
1441 {0, 1, 2, 0, /* 0xc4 */
1448 {1, 1, 3, 0, /* 0xc5 */
1455 {0, 1, 2, 0, /* 0xc6 */
1462 {1, 1, 2, 0, /* 0xc7 */
1469 {0, 1, 2, 0, /* 0xc8 */
1476 {1, 1, 3, 0, /* 0xc9 */
1483 {0, 1, 3, 0, /* 0xca */
1490 {1, 1, 3, 0, /* 0xcb */
1497 {0, 1, 2, 0, /* 0xcc */
1504 {1, 1, 3, 0, /* 0xcd */
1511 {0, 1, 2, 0, /* 0xce */
1518 {1, 1, 2, 0, /* 0xcf */
1525 {0, 1, 2, 0, /* 0xd0 */
1532 {1, 1, 3, 0, /* 0xd1 */
1539 {0, 1, 3, 0, /* 0xd2 */
1546 {1, 1, 3, 0, /* 0xd3 */
1553 {0, 1, 3, 0, /* 0xd4 */
1560 {1, 1, 4, 0, /* 0xd5 */
1567 {0, 1, 3, 0, /* 0xd6 */
1574 {1, 1, 3, 0, /* 0xd7 */
1581 {0, 1, 2, 0, /* 0xd8 */
1588 {1, 1, 3, 0, /* 0xd9 */
1595 {0, 1, 3, 0, /* 0xda */
1602 {1, 1, 3, 0, /* 0xdb */
1609 {0, 1, 2, 0, /* 0xdc */
1616 {1, 1, 3, 0, /* 0xdd */
1623 {0, 1, 2, 0, /* 0xde */
1630 {1, 1, 2, 0, /* 0xdf */
1637 {0, 1, 1, 0, /* 0xe0 */
1644 {1, 1, 2, 0, /* 0xe1 */
1651 {0, 1, 2, 0, /* 0xe2 */
1658 {1, 1, 2, 0, /* 0xe3 */
1665 {0, 1, 2, 0, /* 0xe4 */
1672 {1, 1, 3, 0, /* 0xe5 */
1679 {0, 1, 2, 0, /* 0xe6 */
1686 {1, 1, 2, 0, /* 0xe7 */
1693 {0, 1, 2, 0, /* 0xe8 */
1700 {1, 1, 3, 0, /* 0xe9 */
1707 {0, 1, 3, 0, /* 0xea */
1714 {1, 1, 3, 0, /* 0xeb */
1721 {0, 1, 2, 0, /* 0xec */
1728 {1, 1, 3, 0, /* 0xed */
1735 {0, 1, 2, 0, /* 0xee */
1742 {1, 1, 2, 0, /* 0xef */
1749 {0, 1, 1, 0, /* 0xf0 */
1756 {1, 1, 2, 0, /* 0xf1 */
1763 {0, 1, 2, 0, /* 0xf2 */
1770 {1, 1, 2, 0, /* 0xf3 */
1777 {0, 1, 2, 0, /* 0xf4 */
1784 {1, 1, 3, 0, /* 0xf5 */
1791 {0, 1, 2, 0, /* 0xf6 */
1798 {1, 1, 2, 0, /* 0xf7 */
1805 {0, 1, 1, 0, /* 0xf8 */
1812 {1, 1, 2, 0, /* 0xf9 */
1819 {0, 1, 2, 0, /* 0xfa */
1826 {1, 1, 2, 0, /* 0xfb */
1833 {0, 1, 1, 0, /* 0xfc */
1840 {1, 1, 2, 0, /* 0xfd */
1847 {0, 1, 1, 0, /* 0xfe */
1854 {1, 1, 1, 0, /* 0xff */
1865 sctp_is_address_in_scope(struct sctp_ifa *ifa,
1866 struct sctp_scoping *scope,
1869 if ((scope->loopback_scope == 0) &&
1870 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1872 * skip loopback if not in scope *
1876 switch (ifa->address.sa.sa_family) {
1879 if (scope->ipv4_addr_legal) {
1880 struct sockaddr_in *sin;
1882 sin = (struct sockaddr_in *)&ifa->address.sin;
1883 if (sin->sin_addr.s_addr == 0) {
1884 /* not in scope , unspecified */
1887 if ((scope->ipv4_local_scope == 0) &&
1888 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1889 /* private address not in scope */
1899 if (scope->ipv6_addr_legal) {
1900 struct sockaddr_in6 *sin6;
1903 * Must update the flags, bummer, which means any
1904 * IFA locks must now be applied HERE <->
1907 sctp_gather_internal_ifa_flags(ifa);
1909 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1912 /* ok to use deprecated addresses? */
1913 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
1914 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1915 /* skip unspecifed addresses */
1918 if ( /* (local_scope == 0) && */
1919 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1922 if ((scope->site_scope == 0) &&
1923 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1937 static struct mbuf *
1938 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t * len)
1940 struct sctp_paramhdr *parmh;
1944 switch (ifa->address.sa.sa_family) {
1947 plen = (uint16_t) sizeof(struct sctp_ipv4addr_param);
1952 plen = (uint16_t) sizeof(struct sctp_ipv6addr_param);
1958 if (M_TRAILINGSPACE(m) >= plen) {
1959 /* easy side we just drop it on the end */
1960 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1963 /* Need more space */
1965 while (SCTP_BUF_NEXT(mret) != NULL) {
1966 mret = SCTP_BUF_NEXT(mret);
1968 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
1969 if (SCTP_BUF_NEXT(mret) == NULL) {
1970 /* We are hosed, can't add more addresses */
1973 mret = SCTP_BUF_NEXT(mret);
1974 parmh = mtod(mret, struct sctp_paramhdr *);
1976 /* now add the parameter */
1977 switch (ifa->address.sa.sa_family) {
1981 struct sctp_ipv4addr_param *ipv4p;
1982 struct sockaddr_in *sin;
1984 sin = (struct sockaddr_in *)&ifa->address.sin;
1985 ipv4p = (struct sctp_ipv4addr_param *)parmh;
1986 parmh->param_type = htons(SCTP_IPV4_ADDRESS);
1987 parmh->param_length = htons(plen);
1988 ipv4p->addr = sin->sin_addr.s_addr;
1989 SCTP_BUF_LEN(mret) += plen;
1996 struct sctp_ipv6addr_param *ipv6p;
1997 struct sockaddr_in6 *sin6;
1999 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2000 ipv6p = (struct sctp_ipv6addr_param *)parmh;
2001 parmh->param_type = htons(SCTP_IPV6_ADDRESS);
2002 parmh->param_length = htons(plen);
2003 memcpy(ipv6p->addr, &sin6->sin6_addr,
2004 sizeof(ipv6p->addr));
2005 /* clear embedded scope in the address */
2006 in6_clearscope((struct in6_addr *)ipv6p->addr);
2007 SCTP_BUF_LEN(mret) += plen;
2022 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2023 struct sctp_scoping *scope,
2024 struct mbuf *m_at, int cnt_inits_to,
2025 uint16_t * padding_len, uint16_t * chunk_len)
2027 struct sctp_vrf *vrf = NULL;
2028 int cnt, limit_out = 0, total_count;
2031 vrf_id = inp->def_vrf_id;
2032 SCTP_IPI_ADDR_RLOCK();
2033 vrf = sctp_find_vrf(vrf_id);
2035 SCTP_IPI_ADDR_RUNLOCK();
2038 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2039 struct sctp_ifa *sctp_ifap;
2040 struct sctp_ifn *sctp_ifnp;
2043 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2045 cnt = SCTP_ADDRESS_LIMIT;
2048 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2049 if ((scope->loopback_scope == 0) &&
2050 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2052 * Skip loopback devices if loopback_scope
2057 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2058 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2061 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
2065 if (cnt > SCTP_ADDRESS_LIMIT) {
2069 if (cnt > SCTP_ADDRESS_LIMIT) {
2076 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2078 if ((scope->loopback_scope == 0) &&
2079 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2081 * Skip loopback devices if
2082 * loopback_scope not set
2086 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2087 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2090 if (sctp_is_address_in_scope(sctp_ifap,
2094 if ((chunk_len != NULL) &&
2095 (padding_len != NULL) &&
2096 (*padding_len > 0)) {
2097 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2098 SCTP_BUF_LEN(m_at) += *padding_len;
2099 *chunk_len += *padding_len;
2102 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
2113 if (total_count > SCTP_ADDRESS_LIMIT) {
2114 /* No more addresses */
2122 struct sctp_laddr *laddr;
2125 /* First, how many ? */
2126 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2127 if (laddr->ifa == NULL) {
2130 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2132 * Address being deleted by the system, dont
2136 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2138 * Address being deleted on this ep don't
2143 if (sctp_is_address_in_scope(laddr->ifa,
2150 * To get through a NAT we only list addresses if we have
2151 * more than one. That way if you just bind a single address
2152 * we let the source of the init dictate our address.
2156 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2157 if (laddr->ifa == NULL) {
2160 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2163 if (sctp_is_address_in_scope(laddr->ifa,
2167 if ((chunk_len != NULL) &&
2168 (padding_len != NULL) &&
2169 (*padding_len > 0)) {
2170 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2171 SCTP_BUF_LEN(m_at) += *padding_len;
2172 *chunk_len += *padding_len;
2175 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
2177 if (cnt >= SCTP_ADDRESS_LIMIT) {
2183 SCTP_IPI_ADDR_RUNLOCK();
2187 static struct sctp_ifa *
2188 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2189 uint8_t dest_is_loop,
2190 uint8_t dest_is_priv,
2193 uint8_t dest_is_global = 0;
2195 /* dest_is_priv is true if destination is a private address */
2196 /* dest_is_loop is true if destination is a loopback addresses */
2199 * Here we determine if its a preferred address. A preferred address
2200 * means it is the same scope or higher scope then the destination.
2201 * L = loopback, P = private, G = global
2202 * -----------------------------------------
2203 * src | dest | result
2204 * ----------------------------------------
2206 * -----------------------------------------
2207 * P | L | yes-v4 no-v6
2208 * -----------------------------------------
2209 * G | L | yes-v4 no-v6
2210 * -----------------------------------------
2212 * -----------------------------------------
2214 * -----------------------------------------
2216 * -----------------------------------------
2218 * -----------------------------------------
2220 * -----------------------------------------
2222 * -----------------------------------------
2225 if (ifa->address.sa.sa_family != fam) {
2226 /* forget mis-matched family */
2229 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2232 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2233 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2234 /* Ok the address may be ok */
2236 if (fam == AF_INET6) {
2237 /* ok to use deprecated addresses? no lets not! */
2238 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2239 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2242 if (ifa->src_is_priv && !ifa->src_is_loop) {
2244 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2248 if (ifa->src_is_glob) {
2250 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2257 * Now that we know what is what, implement or table this could in
2258 * theory be done slicker (it used to be), but this is
2259 * straightforward and easier to validate :-)
2261 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2262 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2263 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2264 dest_is_loop, dest_is_priv, dest_is_global);
2266 if ((ifa->src_is_loop) && (dest_is_priv)) {
2267 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2270 if ((ifa->src_is_glob) && (dest_is_priv)) {
2271 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2274 if ((ifa->src_is_loop) && (dest_is_global)) {
2275 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2278 if ((ifa->src_is_priv) && (dest_is_global)) {
2279 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2282 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2283 /* its a preferred address */
2287 static struct sctp_ifa *
2288 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2289 uint8_t dest_is_loop,
2290 uint8_t dest_is_priv,
2293 uint8_t dest_is_global = 0;
2296 * Here we determine if its a acceptable address. A acceptable
2297 * address means it is the same scope or higher scope but we can
2298 * allow for NAT which means its ok to have a global dest and a
2301 * L = loopback, P = private, G = global
2302 * -----------------------------------------
2303 * src | dest | result
2304 * -----------------------------------------
2306 * -----------------------------------------
2307 * P | L | yes-v4 no-v6
2308 * -----------------------------------------
2310 * -----------------------------------------
2312 * -----------------------------------------
2314 * -----------------------------------------
2315 * G | P | yes - May not work
2316 * -----------------------------------------
2318 * -----------------------------------------
2319 * P | G | yes - May not work
2320 * -----------------------------------------
2322 * -----------------------------------------
2325 if (ifa->address.sa.sa_family != fam) {
2326 /* forget non matching family */
2327 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2328 ifa->address.sa.sa_family, fam);
2331 /* Ok the address may be ok */
2332 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2333 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2334 dest_is_loop, dest_is_priv);
2335 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2339 if (fam == AF_INET6) {
2340 /* ok to use deprecated addresses? */
2341 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2344 if (ifa->src_is_priv) {
2345 /* Special case, linklocal to loop */
2352 * Now that we know what is what, implement our table. This could in
2353 * theory be done slicker (it used to be), but this is
2354 * straightforward and easier to validate :-)
2356 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2359 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2362 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2365 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2368 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2369 /* its an acceptable address */
2374 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2376 struct sctp_laddr *laddr;
2379 /* There are no restrictions, no TCB :-) */
2382 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2383 if (laddr->ifa == NULL) {
2384 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2388 if (laddr->ifa == ifa) {
2389 /* Yes it is on the list */
2398 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2400 struct sctp_laddr *laddr;
2404 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2405 if (laddr->ifa == NULL) {
2406 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2410 if ((laddr->ifa == ifa) && laddr->action == 0)
2419 static struct sctp_ifa *
2420 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2423 int non_asoc_addr_ok,
2424 uint8_t dest_is_priv,
2425 uint8_t dest_is_loop,
2428 struct sctp_laddr *laddr, *starting_point;
2431 struct sctp_ifn *sctp_ifn;
2432 struct sctp_ifa *sctp_ifa, *sifa;
2433 struct sctp_vrf *vrf;
2436 vrf = sctp_find_vrf(vrf_id);
2440 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2441 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2442 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2444 * first question, is the ifn we will emit on in our list, if so, we
2445 * want such an address. Note that we first looked for a preferred
2449 /* is a preferred one on the interface we route out? */
2450 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2451 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2452 (non_asoc_addr_ok == 0))
2454 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2459 if (sctp_is_addr_in_ep(inp, sifa)) {
2460 atomic_add_int(&sifa->refcount, 1);
2466 * ok, now we now need to find one on the list of the addresses. We
2467 * can't get one on the emitting interface so let's find first a
2468 * preferred one. If not that an acceptable one otherwise... we
2471 starting_point = inp->next_addr_touse;
2473 if (inp->next_addr_touse == NULL) {
2474 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2477 for (laddr = inp->next_addr_touse; laddr;
2478 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2479 if (laddr->ifa == NULL) {
2480 /* address has been removed */
2483 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2484 /* address is being deleted */
2487 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2491 atomic_add_int(&sifa->refcount, 1);
2494 if (resettotop == 0) {
2495 inp->next_addr_touse = NULL;
2498 inp->next_addr_touse = starting_point;
2501 if (inp->next_addr_touse == NULL) {
2502 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2505 /* ok, what about an acceptable address in the inp */
2506 for (laddr = inp->next_addr_touse; laddr;
2507 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2508 if (laddr->ifa == NULL) {
2509 /* address has been removed */
2512 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2513 /* address is being deleted */
2516 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2520 atomic_add_int(&sifa->refcount, 1);
2523 if (resettotop == 0) {
2524 inp->next_addr_touse = NULL;
2525 goto once_again_too;
2528 * no address bound can be a source for the destination we are in
2536 static struct sctp_ifa *
2537 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2538 struct sctp_tcb *stcb,
2541 uint8_t dest_is_priv,
2542 uint8_t dest_is_loop,
2543 int non_asoc_addr_ok,
2546 struct sctp_laddr *laddr, *starting_point;
2548 struct sctp_ifn *sctp_ifn;
2549 struct sctp_ifa *sctp_ifa, *sifa;
2550 uint8_t start_at_beginning = 0;
2551 struct sctp_vrf *vrf;
2555 * first question, is the ifn we will emit on in our list, if so, we
2558 vrf = sctp_find_vrf(vrf_id);
2562 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2563 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2564 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2567 * first question, is the ifn we will emit on in our list? If so,
2568 * we want that one. First we look for a preferred. Second, we go
2569 * for an acceptable.
2572 /* first try for a preferred address on the ep */
2573 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2574 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2576 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2577 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2580 if (((non_asoc_addr_ok == 0) &&
2581 (sctp_is_addr_restricted(stcb, sifa))) ||
2582 (non_asoc_addr_ok &&
2583 (sctp_is_addr_restricted(stcb, sifa)) &&
2584 (!sctp_is_addr_pending(stcb, sifa)))) {
2585 /* on the no-no list */
2588 atomic_add_int(&sifa->refcount, 1);
2592 /* next try for an acceptable address on the ep */
2593 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2594 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2596 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2597 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2600 if (((non_asoc_addr_ok == 0) &&
2601 (sctp_is_addr_restricted(stcb, sifa))) ||
2602 (non_asoc_addr_ok &&
2603 (sctp_is_addr_restricted(stcb, sifa)) &&
2604 (!sctp_is_addr_pending(stcb, sifa)))) {
2605 /* on the no-no list */
2608 atomic_add_int(&sifa->refcount, 1);
2615 * if we can't find one like that then we must look at all addresses
2616 * bound to pick one at first preferable then secondly acceptable.
2618 starting_point = stcb->asoc.last_used_address;
2620 if (stcb->asoc.last_used_address == NULL) {
2621 start_at_beginning = 1;
2622 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2624 /* search beginning with the last used address */
2625 for (laddr = stcb->asoc.last_used_address; laddr;
2626 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2627 if (laddr->ifa == NULL) {
2628 /* address has been removed */
2631 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2632 /* address is being deleted */
2635 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2638 if (((non_asoc_addr_ok == 0) &&
2639 (sctp_is_addr_restricted(stcb, sifa))) ||
2640 (non_asoc_addr_ok &&
2641 (sctp_is_addr_restricted(stcb, sifa)) &&
2642 (!sctp_is_addr_pending(stcb, sifa)))) {
2643 /* on the no-no list */
2646 stcb->asoc.last_used_address = laddr;
2647 atomic_add_int(&sifa->refcount, 1);
2650 if (start_at_beginning == 0) {
2651 stcb->asoc.last_used_address = NULL;
2652 goto sctp_from_the_top;
2654 /* now try for any higher scope than the destination */
2655 stcb->asoc.last_used_address = starting_point;
2656 start_at_beginning = 0;
2658 if (stcb->asoc.last_used_address == NULL) {
2659 start_at_beginning = 1;
2660 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2662 /* search beginning with the last used address */
2663 for (laddr = stcb->asoc.last_used_address; laddr;
2664 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2665 if (laddr->ifa == NULL) {
2666 /* address has been removed */
2669 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2670 /* address is being deleted */
2673 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2677 if (((non_asoc_addr_ok == 0) &&
2678 (sctp_is_addr_restricted(stcb, sifa))) ||
2679 (non_asoc_addr_ok &&
2680 (sctp_is_addr_restricted(stcb, sifa)) &&
2681 (!sctp_is_addr_pending(stcb, sifa)))) {
2682 /* on the no-no list */
2685 stcb->asoc.last_used_address = laddr;
2686 atomic_add_int(&sifa->refcount, 1);
2689 if (start_at_beginning == 0) {
2690 stcb->asoc.last_used_address = NULL;
2691 goto sctp_from_the_top2;
2696 static struct sctp_ifa *
2697 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2698 struct sctp_tcb *stcb,
2699 int non_asoc_addr_ok,
2700 uint8_t dest_is_loop,
2701 uint8_t dest_is_priv,
2707 struct sctp_ifa *ifa, *sifa;
2708 int num_eligible_addr = 0;
2711 struct sockaddr_in6 sin6, lsa6;
2713 if (fam == AF_INET6) {
2714 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2715 (void)sa6_recoverscope(&sin6);
2718 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2719 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2720 (non_asoc_addr_ok == 0))
2722 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2727 if (fam == AF_INET6 &&
2729 sifa->src_is_loop && sifa->src_is_priv) {
2731 * don't allow fe80::1 to be a src on loop ::1, we
2732 * don't list it to the peer so we will get an
2737 if (fam == AF_INET6 &&
2738 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2739 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2741 * link-local <-> link-local must belong to the same
2744 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2745 (void)sa6_recoverscope(&lsa6);
2746 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2753 * Check if the IPv6 address matches to next-hop. In the
2754 * mobile case, old IPv6 address may be not deleted from the
2755 * interface. Then, the interface has previous and new
2756 * addresses. We should use one corresponding to the
2757 * next-hop. (by micchie)
2760 if (stcb && fam == AF_INET6 &&
2761 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2762 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2769 /* Avoid topologically incorrect IPv4 address */
2770 if (stcb && fam == AF_INET &&
2771 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2772 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2778 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2781 if (((non_asoc_addr_ok == 0) &&
2782 (sctp_is_addr_restricted(stcb, sifa))) ||
2783 (non_asoc_addr_ok &&
2784 (sctp_is_addr_restricted(stcb, sifa)) &&
2785 (!sctp_is_addr_pending(stcb, sifa)))) {
2787 * It is restricted for some reason..
2788 * probably not yet added.
2793 if (num_eligible_addr >= addr_wanted) {
2796 num_eligible_addr++;
2803 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2804 struct sctp_tcb *stcb,
2805 int non_asoc_addr_ok,
2806 uint8_t dest_is_loop,
2807 uint8_t dest_is_priv,
2810 struct sctp_ifa *ifa, *sifa;
2811 int num_eligible_addr = 0;
2813 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2814 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2815 (non_asoc_addr_ok == 0)) {
2818 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2824 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2827 if (((non_asoc_addr_ok == 0) &&
2828 (sctp_is_addr_restricted(stcb, sifa))) ||
2829 (non_asoc_addr_ok &&
2830 (sctp_is_addr_restricted(stcb, sifa)) &&
2831 (!sctp_is_addr_pending(stcb, sifa)))) {
2833 * It is restricted for some reason..
2834 * probably not yet added.
2839 num_eligible_addr++;
2841 return (num_eligible_addr);
2844 static struct sctp_ifa *
2845 sctp_choose_boundall(struct sctp_tcb *stcb,
2846 struct sctp_nets *net,
2849 uint8_t dest_is_priv,
2850 uint8_t dest_is_loop,
2851 int non_asoc_addr_ok,
2854 int cur_addr_num = 0, num_preferred = 0;
2856 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2857 struct sctp_ifa *sctp_ifa, *sifa;
2859 struct sctp_vrf *vrf;
2867 * For boundall we can use any address in the association.
2868 * If non_asoc_addr_ok is set we can use any address (at least in
2869 * theory). So we look for preferred addresses first. If we find one,
2870 * we use it. Otherwise we next try to get an address on the
2871 * interface, which we should be able to do (unless non_asoc_addr_ok
2872 * is false and we are routed out that way). In these cases where we
2873 * can't use the address of the interface we go through all the
2874 * ifn's looking for an address we can use and fill that in. Punting
2875 * means we send back address 0, which will probably cause problems
2876 * actually since then IP will fill in the address of the route ifn,
2877 * which means we probably already rejected it.. i.e. here comes an
2880 vrf = sctp_find_vrf(vrf_id);
2884 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2885 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2886 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2887 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2888 if (sctp_ifn == NULL) {
2889 /* ?? We don't have this guy ?? */
2890 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
2891 goto bound_all_plan_b;
2893 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
2894 ifn_index, sctp_ifn->ifn_name);
2897 cur_addr_num = net->indx_of_eligible_next_to_use;
2899 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
2904 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
2905 num_preferred, sctp_ifn->ifn_name);
2906 if (num_preferred == 0) {
2908 * no eligible addresses, we must use some other interface
2909 * address if we can find one.
2911 goto bound_all_plan_b;
2914 * Ok we have num_eligible_addr set with how many we can use, this
2915 * may vary from call to call due to addresses being deprecated
2918 if (cur_addr_num >= num_preferred) {
2922 * select the nth address from the list (where cur_addr_num is the
2923 * nth) and 0 is the first one, 1 is the second one etc...
2925 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
2927 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
2928 dest_is_priv, cur_addr_num, fam, ro);
2930 /* if sctp_ifa is NULL something changed??, fall to plan b. */
2932 atomic_add_int(&sctp_ifa->refcount, 1);
2934 /* save off where the next one we will want */
2935 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
2940 * plan_b: Look at all interfaces and find a preferred address. If
2941 * no preferred fall through to plan_c.
2944 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
2945 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2946 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
2947 sctp_ifn->ifn_name);
2948 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2949 /* wrong base scope */
2950 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
2953 if ((sctp_ifn == looked_at) && looked_at) {
2954 /* already looked at this guy */
2955 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
2958 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, stcb, non_asoc_addr_ok,
2959 dest_is_loop, dest_is_priv, fam);
2960 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2961 "Found ifn:%p %d preferred source addresses\n",
2962 ifn, num_preferred);
2963 if (num_preferred == 0) {
2964 /* None on this interface. */
2965 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n");
2968 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2969 "num preferred:%d on interface:%p cur_addr_num:%d\n",
2970 num_preferred, (void *)sctp_ifn, cur_addr_num);
2973 * Ok we have num_eligible_addr set with how many we can
2974 * use, this may vary from call to call due to addresses
2975 * being deprecated etc..
2977 if (cur_addr_num >= num_preferred) {
2980 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
2981 dest_is_priv, cur_addr_num, fam, ro);
2985 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
2986 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
2988 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
2989 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
2990 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
2991 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
2993 atomic_add_int(&sifa->refcount, 1);
2997 again_with_private_addresses_allowed:
2999 /* plan_c: do we have an acceptable address on the emit interface */
3001 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3002 if (emit_ifn == NULL) {
3003 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3006 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3007 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3008 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3009 (non_asoc_addr_ok == 0)) {
3010 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3013 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3016 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3020 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3021 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3025 if (((non_asoc_addr_ok == 0) &&
3026 (sctp_is_addr_restricted(stcb, sifa))) ||
3027 (non_asoc_addr_ok &&
3028 (sctp_is_addr_restricted(stcb, sifa)) &&
3029 (!sctp_is_addr_pending(stcb, sifa)))) {
3031 * It is restricted for some reason..
3032 * probably not yet added.
3034 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n");
3039 SCTP_PRINTF("Stcb is null - no print\n");
3041 atomic_add_int(&sifa->refcount, 1);
3046 * plan_d: We are in trouble. No preferred address on the emit
3047 * interface. And not even a preferred address on all interfaces. Go
3048 * out and see if we can find an acceptable address somewhere
3049 * amongst all interfaces.
3051 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3052 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3053 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3054 /* wrong base scope */
3057 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3058 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3059 (non_asoc_addr_ok == 0))
3061 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3067 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3071 if (((non_asoc_addr_ok == 0) &&
3072 (sctp_is_addr_restricted(stcb, sifa))) ||
3073 (non_asoc_addr_ok &&
3074 (sctp_is_addr_restricted(stcb, sifa)) &&
3075 (!sctp_is_addr_pending(stcb, sifa)))) {
3077 * It is restricted for some
3078 * reason.. probably not yet added.
3088 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3089 stcb->asoc.scope.ipv4_local_scope = 1;
3091 goto again_with_private_addresses_allowed;
3092 } else if (retried == 1) {
3093 stcb->asoc.scope.ipv4_local_scope = 0;
3100 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3101 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3102 /* wrong base scope */
3105 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3106 struct sctp_ifa *tmp_sifa;
3108 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3109 (non_asoc_addr_ok == 0))
3111 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3114 if (tmp_sifa == NULL) {
3117 if (tmp_sifa == sifa) {
3121 if (sctp_is_address_in_scope(tmp_sifa,
3122 &stcb->asoc.scope, 0) == 0) {
3125 if (((non_asoc_addr_ok == 0) &&
3126 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3127 (non_asoc_addr_ok &&
3128 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3129 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3139 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3140 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3141 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3146 atomic_add_int(&sifa->refcount, 1);
3154 /* tcb may be NULL */
3156 sctp_source_address_selection(struct sctp_inpcb *inp,
3157 struct sctp_tcb *stcb,
3159 struct sctp_nets *net,
3160 int non_asoc_addr_ok, uint32_t vrf_id)
3162 struct sctp_ifa *answer;
3163 uint8_t dest_is_priv, dest_is_loop;
3167 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3171 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3176 * Rules: - Find the route if needed, cache if I can. - Look at
3177 * interface address in route, Is it in the bound list. If so we
3178 * have the best source. - If not we must rotate amongst the
3183 * Do we need to pay attention to scope. We can have a private address
3184 * or a global address we are sourcing or sending to. So if we draw
3186 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3188 * ------------------------------------------
3189 * source * dest * result
3190 * -----------------------------------------
3191 * <a> Private * Global * NAT
3192 * -----------------------------------------
3193 * <b> Private * Private * No problem
3194 * -----------------------------------------
3195 * <c> Global * Private * Huh, How will this work?
3196 * -----------------------------------------
3197 * <d> Global * Global * No Problem
3198 *------------------------------------------
3199 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3201 *------------------------------------------
3202 * source * dest * result
3203 * -----------------------------------------
3204 * <a> Linklocal * Global *
3205 * -----------------------------------------
3206 * <b> Linklocal * Linklocal * No problem
3207 * -----------------------------------------
3208 * <c> Global * Linklocal * Huh, How will this work?
3209 * -----------------------------------------
3210 * <d> Global * Global * No Problem
3211 *------------------------------------------
3212 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3214 * And then we add to that what happens if there are multiple addresses
3215 * assigned to an interface. Remember the ifa on a ifn is a linked
3216 * list of addresses. So one interface can have more than one IP
3217 * address. What happens if we have both a private and a global
3218 * address? Do we then use context of destination to sort out which
3219 * one is best? And what about NAT's sending P->G may get you a NAT
3220 * translation, or should you select the G thats on the interface in
3225 * - count the number of addresses on the interface.
3226 * - if it is one, no problem except case <c>.
3227 * For <a> we will assume a NAT out there.
3228 * - if there are more than one, then we need to worry about scope P
3229 * or G. We should prefer G -> G and P -> P if possible.
3230 * Then as a secondary fall back to mixed types G->P being a last
3232 * - The above all works for bound all, but bound specific we need to
3233 * use the same concept but instead only consider the bound
3234 * addresses. If the bound set is NOT assigned to the interface then
3235 * we must use rotation amongst the bound addresses..
3237 if (ro->ro_rt == NULL) {
3239 * Need a route to cache.
3241 SCTP_RTALLOC(ro, vrf_id);
3243 if (ro->ro_rt == NULL) {
3246 fam = ro->ro_dst.sa_family;
3247 dest_is_priv = dest_is_loop = 0;
3248 /* Setup our scopes for the destination */
3252 /* Scope based on outbound address */
3253 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3256 /* mark it as local */
3257 net->addr_is_local = 1;
3259 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3266 /* Scope based on outbound address */
3267 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3268 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3270 * If the address is a loopback address, which
3271 * consists of "::1" OR "fe80::1%lo0", we are
3272 * loopback scope. But we don't use dest_is_priv
3273 * (link local addresses).
3277 /* mark it as local */
3278 net->addr_is_local = 1;
3280 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3286 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3287 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3288 SCTP_IPI_ADDR_RLOCK();
3289 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3293 answer = sctp_choose_boundall(stcb, net, ro, vrf_id,
3294 dest_is_priv, dest_is_loop,
3295 non_asoc_addr_ok, fam);
3296 SCTP_IPI_ADDR_RUNLOCK();
3303 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3304 vrf_id, dest_is_priv,
3306 non_asoc_addr_ok, fam);
3308 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3313 SCTP_IPI_ADDR_RUNLOCK();
3318 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3321 int tlen, at, found;
3322 struct sctp_sndinfo sndinfo;
3323 struct sctp_prinfo prinfo;
3324 struct sctp_authinfo authinfo;
3326 tlen = SCTP_BUF_LEN(control);
3330 * Independent of how many mbufs, find the c_type inside the control
3331 * structure and copy out the data.
3334 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3335 /* There is not enough room for one more. */
3338 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3339 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3340 /* We dont't have a complete CMSG header. */
3343 if (((int)cmh.cmsg_len + at) > tlen) {
3344 /* We don't have the complete CMSG. */
3347 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3348 ((c_type == cmh.cmsg_type) ||
3349 ((c_type == SCTP_SNDRCV) &&
3350 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3351 (cmh.cmsg_type == SCTP_PRINFO) ||
3352 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3353 if (c_type == cmh.cmsg_type) {
3354 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
3357 /* It is exactly what we want. Copy it out. */
3358 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), cpsize, (caddr_t)data);
3361 struct sctp_sndrcvinfo *sndrcvinfo;
3363 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3365 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3368 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3370 switch (cmh.cmsg_type) {
3372 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
3375 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3376 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3377 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3378 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3379 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3380 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3383 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
3386 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3387 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3388 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3391 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
3394 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3395 sndrcvinfo->sinfo_keynumber_valid = 1;
3396 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3404 at += CMSG_ALIGN(cmh.cmsg_len);
3410 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3414 struct sctp_initmsg initmsg;
3417 struct sockaddr_in sin;
3421 struct sockaddr_in6 sin6;
3425 tlen = SCTP_BUF_LEN(control);
3428 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3429 /* There is not enough room for one more. */
3433 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3434 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3435 /* We dont't have a complete CMSG header. */
3439 if (((int)cmh.cmsg_len + at) > tlen) {
3440 /* We don't have the complete CMSG. */
3444 if (cmh.cmsg_level == IPPROTO_SCTP) {
3445 switch (cmh.cmsg_type) {
3447 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
3451 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3452 if (initmsg.sinit_max_attempts)
3453 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3454 if (initmsg.sinit_num_ostreams)
3455 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3456 if (initmsg.sinit_max_instreams)
3457 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3458 if (initmsg.sinit_max_init_timeo)
3459 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3460 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3461 struct sctp_stream_out *tmp_str;
3464 /* Default is NOT correct */
3465 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3466 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3467 SCTP_TCB_UNLOCK(stcb);
3468 SCTP_MALLOC(tmp_str,
3469 struct sctp_stream_out *,
3470 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3472 SCTP_TCB_LOCK(stcb);
3473 if (tmp_str != NULL) {
3474 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3475 stcb->asoc.strmout = tmp_str;
3476 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3478 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3480 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3481 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3482 stcb->asoc.strmout[i].chunks_on_queues = 0;
3483 stcb->asoc.strmout[i].next_sequence_send = 0;
3484 stcb->asoc.strmout[i].stream_no = i;
3485 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3486 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3491 case SCTP_DSTADDRV4:
3492 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3496 memset(&sin, 0, sizeof(struct sockaddr_in));
3497 sin.sin_family = AF_INET;
3498 sin.sin_len = sizeof(struct sockaddr_in);
3499 sin.sin_port = stcb->rport;
3500 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3501 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3502 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3503 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3507 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3508 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3515 case SCTP_DSTADDRV6:
3516 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3520 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3521 sin6.sin6_family = AF_INET6;
3522 sin6.sin6_len = sizeof(struct sockaddr_in6);
3523 sin6.sin6_port = stcb->rport;
3524 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3525 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3526 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3531 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3532 in6_sin6_2_sin(&sin, &sin6);
3533 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3534 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3535 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3539 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3540 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3546 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
3547 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3557 at += CMSG_ALIGN(cmh.cmsg_len);
3562 static struct sctp_tcb *
3563 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3565 struct mbuf *control,
3566 struct sctp_nets **net_p,
3571 struct sctp_tcb *stcb;
3572 struct sockaddr *addr;
3575 struct sockaddr_in sin;
3579 struct sockaddr_in6 sin6;
3583 tlen = SCTP_BUF_LEN(control);
3586 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3587 /* There is not enough room for one more. */
3591 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3592 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3593 /* We dont't have a complete CMSG header. */
3597 if (((int)cmh.cmsg_len + at) > tlen) {
3598 /* We don't have the complete CMSG. */
3602 if (cmh.cmsg_level == IPPROTO_SCTP) {
3603 switch (cmh.cmsg_type) {
3605 case SCTP_DSTADDRV4:
3606 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3610 memset(&sin, 0, sizeof(struct sockaddr_in));
3611 sin.sin_family = AF_INET;
3612 sin.sin_len = sizeof(struct sockaddr_in);
3613 sin.sin_port = port;
3614 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3615 addr = (struct sockaddr *)&sin;
3619 case SCTP_DSTADDRV6:
3620 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3624 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3625 sin6.sin6_family = AF_INET6;
3626 sin6.sin6_len = sizeof(struct sockaddr_in6);
3627 sin6.sin6_port = port;
3628 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3630 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3631 in6_sin6_2_sin(&sin, &sin6);
3632 addr = (struct sockaddr *)&sin;
3635 addr = (struct sockaddr *)&sin6;
3643 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3649 at += CMSG_ALIGN(cmh.cmsg_len);
3654 static struct mbuf *
3655 sctp_add_cookie(struct mbuf *init, int init_offset,
3656 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3658 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3659 struct sctp_state_cookie *stc;
3660 struct sctp_paramhdr *ph;
3666 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3667 sizeof(struct sctp_paramhdr)), 0,
3668 M_DONTWAIT, 1, MT_DATA);
3672 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_DONTWAIT);
3673 if (copy_init == NULL) {
3677 #ifdef SCTP_MBUF_LOGGING
3678 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3681 for (mat = copy_init; mat; mat = SCTP_BUF_NEXT(mat)) {
3682 if (SCTP_BUF_IS_EXTENDED(mat)) {
3683 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3688 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3690 if (copy_initack == NULL) {
3692 sctp_m_freem(copy_init);
3695 #ifdef SCTP_MBUF_LOGGING
3696 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3699 for (mat = copy_initack; mat; mat = SCTP_BUF_NEXT(mat)) {
3700 if (SCTP_BUF_IS_EXTENDED(mat)) {
3701 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3706 /* easy side we just drop it on the end */
3707 ph = mtod(mret, struct sctp_paramhdr *);
3708 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3709 sizeof(struct sctp_paramhdr);
3710 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3711 sizeof(struct sctp_paramhdr));
3712 ph->param_type = htons(SCTP_STATE_COOKIE);
3713 ph->param_length = 0; /* fill in at the end */
3714 /* Fill in the stc cookie data */
3715 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3717 /* tack the INIT and then the INIT-ACK onto the chain */
3719 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3720 cookie_sz += SCTP_BUF_LEN(m_at);
3721 if (SCTP_BUF_NEXT(m_at) == NULL) {
3722 SCTP_BUF_NEXT(m_at) = copy_init;
3726 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3727 cookie_sz += SCTP_BUF_LEN(m_at);
3728 if (SCTP_BUF_NEXT(m_at) == NULL) {
3729 SCTP_BUF_NEXT(m_at) = copy_initack;
3733 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3734 cookie_sz += SCTP_BUF_LEN(m_at);
3735 if (SCTP_BUF_NEXT(m_at) == NULL) {
3739 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_DONTWAIT, 1, MT_DATA);
3741 /* no space, so free the entire chain */
3745 SCTP_BUF_LEN(sig) = 0;
3746 SCTP_BUF_NEXT(m_at) = sig;
3748 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3749 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3751 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3752 cookie_sz += SCTP_SIGNATURE_SIZE;
3753 ph->param_length = htons(cookie_sz);
3759 sctp_get_ect(struct sctp_tcb *stcb)
3761 if ((stcb != NULL) && (stcb->asoc.ecn_allowed == 1)) {
3762 return (SCTP_ECT0_BIT);
3768 #if defined(INET) || defined(INET6)
3770 sctp_handle_no_route(struct sctp_tcb *stcb,
3771 struct sctp_nets *net,
3774 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3777 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3778 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3779 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3780 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3781 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3782 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3786 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3787 net->dest_state &= ~SCTP_ADDR_PF;
3791 if (net == stcb->asoc.primary_destination) {
3792 /* need a new primary */
3793 struct sctp_nets *alt;
3795 alt = sctp_find_alternate_net(stcb, net, 0);
3797 if (stcb->asoc.alternate) {
3798 sctp_free_remote_addr(stcb->asoc.alternate);
3800 stcb->asoc.alternate = alt;
3801 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3802 if (net->ro._s_addr) {
3803 sctp_free_ifa(net->ro._s_addr);
3804 net->ro._s_addr = NULL;
3806 net->src_addr_selected = 0;
3816 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3817 struct sctp_tcb *stcb, /* may be NULL */
3818 struct sctp_nets *net,
3819 struct sockaddr *to,
3821 uint32_t auth_offset,
3822 struct sctp_auth_chunk *auth,
3823 uint16_t auth_keyid,
3824 int nofragment_flag,
3831 union sctp_sockstore *over_addr,
3832 uint8_t use_mflowid, uint32_t mflowid,
3833 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3834 int so_locked SCTP_UNUSED
3839 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3842 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3843 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3844 * - fill in the HMAC digest of any AUTH chunk in the packet.
3845 * - calculate and fill in the SCTP checksum.
3846 * - prepend an IP address header.
3847 * - if boundall use INADDR_ANY.
3848 * - if boundspecific do source address selection.
3849 * - set fragmentation option for ipV4.
3850 * - On return from IP output, check/adjust mtu size of output
3851 * interface and smallest_mtu size as well.
3853 /* Will need ifdefs around this */
3855 struct sctphdr *sctphdr;
3860 #if defined(INET) || defined(INET6)
3862 sctp_route_t *ro = NULL;
3863 struct udphdr *udp = NULL;
3868 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3869 struct socket *so = NULL;
3873 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
3874 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
3879 vrf_id = stcb->asoc.vrf_id;
3881 vrf_id = inp->def_vrf_id;
3884 /* fill in the HMAC digest for any AUTH chunk in the packet */
3885 if ((auth != NULL) && (stcb != NULL)) {
3886 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
3889 tos_value = net->dscp;
3891 tos_value = stcb->asoc.default_dscp;
3893 tos_value = inp->sctp_ep.default_dscp;
3896 switch (to->sa_family) {
3900 struct ip *ip = NULL;
3901 sctp_route_t iproute;
3904 len = sizeof(struct ip) + sizeof(struct sctphdr);
3906 len += sizeof(struct udphdr);
3908 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
3911 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
3914 SCTP_ALIGN_TO_END(newm, len);
3915 SCTP_BUF_LEN(newm) = len;
3916 SCTP_BUF_NEXT(newm) = m;
3920 if (net->flowidset == 0) {
3921 panic("Flow ID not set");
3924 m->m_pkthdr.flowid = net->flowid;
3925 m->m_flags |= M_FLOWID;
3927 if (use_mflowid != 0) {
3928 m->m_pkthdr.flowid = mflowid;
3929 m->m_flags |= M_FLOWID;
3932 packet_length = sctp_calculate_len(m);
3933 ip = mtod(m, struct ip *);
3934 ip->ip_v = IPVERSION;
3935 ip->ip_hl = (sizeof(struct ip) >> 2);
3936 if (tos_value == 0) {
3938 * This means especially, that it is not set
3939 * at the SCTP layer. So use the value from
3942 tos_value = inp->ip_inp.inp.inp_ip_tos;
3946 tos_value |= sctp_get_ect(stcb);
3948 if ((nofragment_flag) && (port == 0)) {
3953 /* FreeBSD has a function for ip_id's */
3954 ip->ip_id = ip_newid();
3956 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
3957 ip->ip_len = packet_length;
3958 ip->ip_tos = tos_value;
3960 ip->ip_p = IPPROTO_UDP;
3962 ip->ip_p = IPPROTO_SCTP;
3967 memset(&iproute, 0, sizeof(iproute));
3968 memcpy(&ro->ro_dst, to, to->sa_len);
3970 ro = (sctp_route_t *) & net->ro;
3972 /* Now the address selection part */
3973 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
3975 /* call the routine to select the src address */
3976 if (net && out_of_asoc_ok == 0) {
3977 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
3978 sctp_free_ifa(net->ro._s_addr);
3979 net->ro._s_addr = NULL;
3980 net->src_addr_selected = 0;
3986 if (net->src_addr_selected == 0) {
3987 /* Cache the source address */
3988 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
3991 net->src_addr_selected = 1;
3993 if (net->ro._s_addr == NULL) {
3994 /* No route to host */
3995 net->src_addr_selected = 0;
3996 sctp_handle_no_route(stcb, net, so_locked);
3997 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
3999 return (EHOSTUNREACH);
4001 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4003 if (over_addr == NULL) {
4004 struct sctp_ifa *_lsrc;
4006 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4010 if (_lsrc == NULL) {
4011 sctp_handle_no_route(stcb, net, so_locked);
4012 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4014 return (EHOSTUNREACH);
4016 ip->ip_src = _lsrc->address.sin.sin_addr;
4017 sctp_free_ifa(_lsrc);
4019 ip->ip_src = over_addr->sin.sin_addr;
4020 SCTP_RTALLOC(ro, vrf_id);
4024 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4025 sctp_handle_no_route(stcb, net, so_locked);
4026 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4028 return (EHOSTUNREACH);
4030 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4031 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4032 udp->uh_dport = port;
4033 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4035 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4039 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4041 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4044 sctphdr->src_port = src_port;
4045 sctphdr->dest_port = dest_port;
4046 sctphdr->v_tag = v_tag;
4047 sctphdr->checksum = 0;
4050 * If source address selection fails and we find no
4051 * route then the ip_output should fail as well with
4052 * a NO_ROUTE_TO_HOST type error. We probably should
4053 * catch that somewhere and abort the association
4054 * right away (assuming this is an INIT being sent).
4056 if (ro->ro_rt == NULL) {
4058 * src addr selection failed to find a route
4059 * (or valid source addr), so we can't get
4060 * there from here (yet)!
4062 sctp_handle_no_route(stcb, net, so_locked);
4063 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4065 return (EHOSTUNREACH);
4067 if (ro != &iproute) {
4068 memcpy(&iproute, ro, sizeof(*ro));
4070 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4071 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4072 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4073 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4074 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4077 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4078 /* failed to prepend data, give up */
4079 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4083 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4085 #if defined(SCTP_WITH_NO_CSUM)
4086 SCTP_STAT_INCR(sctps_sendnocrc);
4088 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4089 SCTP_STAT_INCR(sctps_sendswcrc);
4092 SCTP_ENABLE_UDP_CSUM(o_pak);
4095 #if defined(SCTP_WITH_NO_CSUM)
4096 SCTP_STAT_INCR(sctps_sendnocrc);
4098 m->m_pkthdr.csum_flags = CSUM_SCTP;
4099 m->m_pkthdr.csum_data = 0;
4100 SCTP_STAT_INCR(sctps_sendhwcrc);
4103 #ifdef SCTP_PACKET_LOGGING
4104 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4105 sctp_packet_log(o_pak);
4107 /* send it out. table id is taken from stcb */
4108 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4109 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4110 so = SCTP_INP_SO(inp);
4111 SCTP_SOCKET_UNLOCK(so, 0);
4114 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4115 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4116 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4117 atomic_add_int(&stcb->asoc.refcnt, 1);
4118 SCTP_TCB_UNLOCK(stcb);
4119 SCTP_SOCKET_LOCK(so, 0);
4120 SCTP_TCB_LOCK(stcb);
4121 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4124 SCTP_STAT_INCR(sctps_sendpackets);
4125 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4127 SCTP_STAT_INCR(sctps_senderrors);
4129 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4131 /* free tempy routes */
4138 * PMTU check versus smallest asoc MTU goes
4141 if ((ro->ro_rt != NULL) &&
4142 (net->ro._s_addr)) {
4145 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4147 mtu -= sizeof(struct udphdr);
4149 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4150 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4153 } else if (ro->ro_rt == NULL) {
4154 /* route was freed */
4155 if (net->ro._s_addr &&
4156 net->src_addr_selected) {
4157 sctp_free_ifa(net->ro._s_addr);
4158 net->ro._s_addr = NULL;
4160 net->src_addr_selected = 0;
4169 uint32_t flowlabel, flowinfo;
4170 struct ip6_hdr *ip6h;
4171 struct route_in6 ip6route;
4173 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4175 struct sockaddr_in6 lsa6_storage;
4177 u_short prev_port = 0;
4181 flowlabel = net->flowlabel;
4183 flowlabel = stcb->asoc.default_flowlabel;
4185 flowlabel = inp->sctp_ep.default_flowlabel;
4187 if (flowlabel == 0) {
4189 * This means especially, that it is not set
4190 * at the SCTP layer. So use the value from
4193 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4195 flowlabel &= 0x000fffff;
4196 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
4198 len += sizeof(struct udphdr);
4200 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
4203 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4206 SCTP_ALIGN_TO_END(newm, len);
4207 SCTP_BUF_LEN(newm) = len;
4208 SCTP_BUF_NEXT(newm) = m;
4212 if (net->flowidset == 0) {
4213 panic("Flow ID not set");
4216 m->m_pkthdr.flowid = net->flowid;
4217 m->m_flags |= M_FLOWID;
4219 if (use_mflowid != 0) {
4220 m->m_pkthdr.flowid = mflowid;
4221 m->m_flags |= M_FLOWID;
4224 packet_length = sctp_calculate_len(m);
4226 ip6h = mtod(m, struct ip6_hdr *);
4227 /* protect *sin6 from overwrite */
4228 sin6 = (struct sockaddr_in6 *)to;
4232 /* KAME hack: embed scopeid */
4233 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4234 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4238 memset(&ip6route, 0, sizeof(ip6route));
4239 ro = (sctp_route_t *) & ip6route;
4240 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4242 ro = (sctp_route_t *) & net->ro;
4245 * We assume here that inp_flow is in host byte
4246 * order within the TCB!
4248 if (tos_value == 0) {
4250 * This means especially, that it is not set
4251 * at the SCTP layer. So use the value from
4254 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4258 tos_value |= sctp_get_ect(stcb);
4262 flowinfo |= tos_value;
4264 flowinfo |= flowlabel;
4265 ip6h->ip6_flow = htonl(flowinfo);
4267 ip6h->ip6_nxt = IPPROTO_UDP;
4269 ip6h->ip6_nxt = IPPROTO_SCTP;
4271 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4272 ip6h->ip6_dst = sin6->sin6_addr;
4275 * Add SRC address selection here: we can only reuse
4276 * to a limited degree the kame src-addr-sel, since
4277 * we can try their selection but it may not be
4280 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4281 lsa6_tmp.sin6_family = AF_INET6;
4282 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4284 if (net && out_of_asoc_ok == 0) {
4285 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4286 sctp_free_ifa(net->ro._s_addr);
4287 net->ro._s_addr = NULL;
4288 net->src_addr_selected = 0;
4294 if (net->src_addr_selected == 0) {
4295 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4296 /* KAME hack: embed scopeid */
4297 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4298 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4301 /* Cache the source address */
4302 net->ro._s_addr = sctp_source_address_selection(inp,
4308 (void)sa6_recoverscope(sin6);
4309 net->src_addr_selected = 1;
4311 if (net->ro._s_addr == NULL) {
4312 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4313 net->src_addr_selected = 0;
4314 sctp_handle_no_route(stcb, net, so_locked);
4315 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4317 return (EHOSTUNREACH);
4319 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4321 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4322 /* KAME hack: embed scopeid */
4323 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4324 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4327 if (over_addr == NULL) {
4328 struct sctp_ifa *_lsrc;
4330 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4334 if (_lsrc == NULL) {
4335 sctp_handle_no_route(stcb, net, so_locked);
4336 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4338 return (EHOSTUNREACH);
4340 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4341 sctp_free_ifa(_lsrc);
4343 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4344 SCTP_RTALLOC(ro, vrf_id);
4346 (void)sa6_recoverscope(sin6);
4348 lsa6->sin6_port = inp->sctp_lport;
4350 if (ro->ro_rt == NULL) {
4352 * src addr selection failed to find a route
4353 * (or valid source addr), so we can't get
4356 sctp_handle_no_route(stcb, net, so_locked);
4357 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4359 return (EHOSTUNREACH);
4362 * XXX: sa6 may not have a valid sin6_scope_id in
4363 * the non-SCOPEDROUTING case.
4365 bzero(&lsa6_storage, sizeof(lsa6_storage));
4366 lsa6_storage.sin6_family = AF_INET6;
4367 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4368 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4369 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4370 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4375 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4376 lsa6_storage.sin6_port = inp->sctp_lport;
4377 lsa6 = &lsa6_storage;
4378 ip6h->ip6_src = lsa6->sin6_addr;
4381 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4382 sctp_handle_no_route(stcb, net, so_locked);
4383 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4385 return (EHOSTUNREACH);
4387 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4388 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4389 udp->uh_dport = port;
4390 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4392 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4394 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4397 sctphdr->src_port = src_port;
4398 sctphdr->dest_port = dest_port;
4399 sctphdr->v_tag = v_tag;
4400 sctphdr->checksum = 0;
4403 * We set the hop limit now since there is a good
4404 * chance that our ro pointer is now filled
4406 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4407 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4410 /* Copy to be sure something bad is not happening */
4411 sin6->sin6_addr = ip6h->ip6_dst;
4412 lsa6->sin6_addr = ip6h->ip6_src;
4415 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4416 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4417 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4418 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4419 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4421 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4423 * preserve the port and scope for link
4426 prev_scope = sin6->sin6_scope_id;
4427 prev_port = sin6->sin6_port;
4429 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4430 /* failed to prepend data, give up */
4432 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4435 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4437 #if defined(SCTP_WITH_NO_CSUM)
4438 SCTP_STAT_INCR(sctps_sendnocrc);
4440 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4441 SCTP_STAT_INCR(sctps_sendswcrc);
4443 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4444 udp->uh_sum = 0xffff;
4447 #if defined(SCTP_WITH_NO_CSUM)
4448 SCTP_STAT_INCR(sctps_sendnocrc);
4450 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr));
4451 SCTP_STAT_INCR(sctps_sendswcrc);
4454 /* send it out. table id is taken from stcb */
4455 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4456 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4457 so = SCTP_INP_SO(inp);
4458 SCTP_SOCKET_UNLOCK(so, 0);
4461 #ifdef SCTP_PACKET_LOGGING
4462 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4463 sctp_packet_log(o_pak);
4465 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4466 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4467 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4468 atomic_add_int(&stcb->asoc.refcnt, 1);
4469 SCTP_TCB_UNLOCK(stcb);
4470 SCTP_SOCKET_LOCK(so, 0);
4471 SCTP_TCB_LOCK(stcb);
4472 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4476 /* for link local this must be done */
4477 sin6->sin6_scope_id = prev_scope;
4478 sin6->sin6_port = prev_port;
4480 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4481 SCTP_STAT_INCR(sctps_sendpackets);
4482 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4484 SCTP_STAT_INCR(sctps_senderrors);
4487 /* Now if we had a temp route free it */
4494 * PMTU check versus smallest asoc MTU goes
4497 if (ro->ro_rt == NULL) {
4498 /* Route was freed */
4499 if (net->ro._s_addr &&
4500 net->src_addr_selected) {
4501 sctp_free_ifa(net->ro._s_addr);
4502 net->ro._s_addr = NULL;
4504 net->src_addr_selected = 0;
4506 if ((ro->ro_rt != NULL) &&
4507 (net->ro._s_addr)) {
4510 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4512 (stcb->asoc.smallest_mtu > mtu)) {
4513 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4516 net->mtu -= sizeof(struct udphdr);
4520 if (ND_IFINFO(ifp)->linkmtu &&
4521 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4522 sctp_mtu_size_reset(inp,
4524 ND_IFINFO(ifp)->linkmtu);
4532 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4533 ((struct sockaddr *)to)->sa_family);
4535 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4542 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4543 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4549 struct sctp_nets *net;
4550 struct sctp_init_chunk *init;
4552 #if defined(INET) || defined(INET6)
4553 struct sctp_supported_addr_param *sup_addr;
4556 struct sctp_adaptation_layer_indication *ali;
4557 struct sctp_supported_chunk_types_param *pr_supported;
4558 struct sctp_paramhdr *ph;
4559 int cnt_inits_to = 0;
4561 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4563 /* INIT's always go to the primary (and usually ONLY address) */
4564 net = stcb->asoc.primary_destination;
4566 net = TAILQ_FIRST(&stcb->asoc.nets);
4571 /* we confirm any address we send an INIT to */
4572 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4573 (void)sctp_set_primary_addr(stcb, NULL, net);
4575 /* we confirm any address we send an INIT to */
4576 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4578 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4580 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4582 * special hook, if we are sending to link local it will not
4583 * show up in our private address count.
4585 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4589 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4590 /* This case should not happen */
4591 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4594 /* start the INIT timer */
4595 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4597 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA);
4599 /* No memory, INIT timer will re-attempt. */
4600 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4603 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4606 * assume peer supports asconf in order to be able to queue local
4607 * address changes while an INIT is in flight and before the assoc
4610 stcb->asoc.peer_supports_asconf = 1;
4611 /* Now lets put the chunk header in place */
4612 init = mtod(m, struct sctp_init_chunk *);
4613 /* now the chunk header */
4614 init->ch.chunk_type = SCTP_INITIATION;
4615 init->ch.chunk_flags = 0;
4616 /* fill in later from mbuf we build */
4617 init->ch.chunk_length = 0;
4618 /* place in my tag */
4619 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4620 /* set up some of the credits. */
4621 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4622 SCTP_MINIMAL_RWND));
4623 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4624 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4625 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4627 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4630 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4631 if (stcb->asoc.scope.ipv4_addr_legal) {
4632 parameter_len += (uint16_t) sizeof(uint16_t);
4634 if (stcb->asoc.scope.ipv6_addr_legal) {
4635 parameter_len += (uint16_t) sizeof(uint16_t);
4637 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4638 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4639 sup_addr->ph.param_length = htons(parameter_len);
4641 if (stcb->asoc.scope.ipv4_addr_legal) {
4642 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4644 if (stcb->asoc.scope.ipv6_addr_legal) {
4645 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4647 padding_len = 4 - 2 * i;
4648 chunk_len += parameter_len;
4650 /* Adaptation layer indication parameter */
4651 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4652 if (padding_len > 0) {
4653 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4654 chunk_len += padding_len;
4657 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4658 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4659 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4660 ali->ph.param_length = htons(parameter_len);
4661 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
4662 chunk_len += parameter_len;
4664 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4665 /* Add NAT friendly parameter. */
4666 if (padding_len > 0) {
4667 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4668 chunk_len += padding_len;
4671 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4672 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4673 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4674 ph->param_length = htons(parameter_len);
4675 chunk_len += parameter_len;
4677 /* now any cookie time extensions */
4678 if (stcb->asoc.cookie_preserve_req) {
4679 struct sctp_cookie_perserve_param *cookie_preserve;
4681 if (padding_len > 0) {
4682 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4683 chunk_len += padding_len;
4686 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4687 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4688 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4689 cookie_preserve->ph.param_length = htons(parameter_len);
4690 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4691 stcb->asoc.cookie_preserve_req = 0;
4692 chunk_len += parameter_len;
4695 if (stcb->asoc.ecn_allowed == 1) {
4696 if (padding_len > 0) {
4697 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4698 chunk_len += padding_len;
4701 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4702 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4703 ph->param_type = htons(SCTP_ECN_CAPABLE);
4704 ph->param_length = htons(parameter_len);
4705 chunk_len += parameter_len;
4707 /* And now tell the peer we do support PR-SCTP. */
4708 if (padding_len > 0) {
4709 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4710 chunk_len += padding_len;
4713 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4714 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4715 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4716 ph->param_length = htons(parameter_len);
4717 chunk_len += parameter_len;
4719 /* And now tell the peer we do all the extensions */
4720 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4721 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4723 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4724 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4725 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4726 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4727 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4728 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4729 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4731 if (stcb->asoc.sctp_nr_sack_on_off == 1) {
4732 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4734 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4735 pr_supported->ph.param_length = htons(parameter_len);
4736 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4737 chunk_len += parameter_len;
4739 /* add authentication parameters */
4740 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4741 /* attach RANDOM parameter, if available */
4742 if (stcb->asoc.authinfo.random != NULL) {
4743 struct sctp_auth_random *randp;
4745 if (padding_len > 0) {
4746 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4747 chunk_len += padding_len;
4750 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4751 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4752 /* random key already contains the header */
4753 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4754 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4755 chunk_len += parameter_len;
4757 /* add HMAC_ALGO parameter */
4758 if ((stcb->asoc.local_hmacs != NULL) &&
4759 (stcb->asoc.local_hmacs->num_algo > 0)) {
4760 struct sctp_auth_hmac_algo *hmacs;
4762 if (padding_len > 0) {
4763 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4764 chunk_len += padding_len;
4767 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4768 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4769 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4770 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4771 hmacs->ph.param_length = htons(parameter_len);
4772 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4773 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4774 chunk_len += parameter_len;
4776 /* add CHUNKS parameter */
4777 if (sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks) > 0) {
4778 struct sctp_auth_chunk_list *chunks;
4780 if (padding_len > 0) {
4781 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4782 chunk_len += padding_len;
4785 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4786 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4787 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4788 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4789 chunks->ph.param_length = htons(parameter_len);
4790 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4791 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4792 chunk_len += parameter_len;
4795 SCTP_BUF_LEN(m) = chunk_len;
4797 /* now the addresses */
4799 * To optimize this we could put the scoping stuff into a structure
4800 * and remove the individual uint8's from the assoc structure. Then
4801 * we could just sifa in the address within the stcb. But for now
4802 * this is a quick hack to get the address stuff teased apart.
4804 sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope, m, cnt_inits_to, &padding_len, &chunk_len);
4806 init->ch.chunk_length = htons(chunk_len);
4807 if (padding_len > 0) {
4808 struct mbuf *m_at, *mp_last;
4811 for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
4812 if (SCTP_BUF_NEXT(m_at) == NULL)
4815 if ((mp_last == NULL) || sctp_add_pad_tombuf(mp_last, padding_len)) {
4820 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4821 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4822 (struct sockaddr *)&net->ro._l_addr,
4823 m, 0, NULL, 0, 0, 0, 0,
4824 inp->sctp_lport, stcb->rport, htonl(0),
4828 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4829 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4830 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4834 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4835 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4838 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4839 * being equal to the beginning of the params i.e. (iphlen +
4840 * sizeof(struct sctp_init_msg) parse through the parameters to the
4841 * end of the mbuf verifying that all parameters are known.
4843 * For unknown parameters build and return a mbuf with
4844 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4845 * processing this chunk stop, and set *abort_processing to 1.
4847 * By having param_offset be pre-set to where parameters begin it is
4848 * hoped that this routine may be reused in the future by new
4851 struct sctp_paramhdr *phdr, params;
4853 struct mbuf *mat, *op_err;
4854 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4855 int at, limit, pad_needed;
4856 uint16_t ptype, plen, padded_size;
4859 *abort_processing = 0;
4862 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4865 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4866 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4867 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4868 ptype = ntohs(phdr->param_type);
4869 plen = ntohs(phdr->param_length);
4870 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4871 /* wacked parameter */
4872 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4875 limit -= SCTP_SIZE32(plen);
4877 * All parameters for all chunks that we know/understand are
4878 * listed here. We process them other places and make
4879 * appropriate stop actions per the upper bits. However this
4880 * is the generic routine processor's can call to get back
4881 * an operr.. to either incorporate (init-ack) or send.
4883 padded_size = SCTP_SIZE32(plen);
4885 /* Param's with variable size */
4886 case SCTP_HEARTBEAT_INFO:
4887 case SCTP_STATE_COOKIE:
4888 case SCTP_UNRECOG_PARAM:
4889 case SCTP_ERROR_CAUSE_IND:
4893 /* Param's with variable size within a range */
4894 case SCTP_CHUNK_LIST:
4895 case SCTP_SUPPORTED_CHUNK_EXT:
4896 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
4897 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
4902 case SCTP_SUPPORTED_ADDRTYPE:
4903 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
4904 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
4910 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
4911 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
4916 case SCTP_SET_PRIM_ADDR:
4917 case SCTP_DEL_IP_ADDRESS:
4918 case SCTP_ADD_IP_ADDRESS:
4919 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
4920 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
4921 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
4926 /* Param's with a fixed size */
4927 case SCTP_IPV4_ADDRESS:
4928 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
4929 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
4934 case SCTP_IPV6_ADDRESS:
4935 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
4936 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
4941 case SCTP_COOKIE_PRESERVE:
4942 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
4943 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
4948 case SCTP_HAS_NAT_SUPPORT:
4951 case SCTP_PRSCTP_SUPPORTED:
4953 if (padded_size != sizeof(struct sctp_paramhdr)) {
4954 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
4959 case SCTP_ECN_CAPABLE:
4960 if (padded_size != sizeof(struct sctp_ecn_supported_param)) {
4961 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
4966 case SCTP_ULP_ADAPTATION:
4967 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
4968 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
4973 case SCTP_SUCCESS_REPORT:
4974 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
4975 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
4980 case SCTP_HOSTNAME_ADDRESS:
4982 /* We can NOT handle HOST NAME addresses!! */
4985 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
4986 *abort_processing = 1;
4987 if (op_err == NULL) {
4988 /* Ok need to try to get a mbuf */
4990 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
4992 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
4995 l_len += sizeof(struct sctp_paramhdr);
4996 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
4998 SCTP_BUF_LEN(op_err) = 0;
5000 * pre-reserve space for ip
5001 * and sctp header and
5005 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5007 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5009 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5010 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5014 /* If we have space */
5015 struct sctp_paramhdr s;
5018 uint32_t cpthis = 0;
5020 pad_needed = 4 - (err_at % 4);
5021 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5022 err_at += pad_needed;
5024 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5025 s.param_length = htons(sizeof(s) + plen);
5026 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5027 err_at += sizeof(s);
5028 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5030 sctp_m_freem(op_err);
5032 * we are out of memory but
5033 * we still need to have a
5034 * look at what to do (the
5035 * system is in trouble
5040 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5047 * we do not recognize the parameter figure out what
5050 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5051 if ((ptype & 0x4000) == 0x4000) {
5052 /* Report bit is set?? */
5053 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5054 if (op_err == NULL) {
5057 /* Ok need to try to get an mbuf */
5059 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5061 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5064 l_len += sizeof(struct sctp_paramhdr);
5065 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5067 SCTP_BUF_LEN(op_err) = 0;
5069 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5071 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5073 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5074 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5078 /* If we have space */
5079 struct sctp_paramhdr s;
5082 uint32_t cpthis = 0;
5084 pad_needed = 4 - (err_at % 4);
5085 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5086 err_at += pad_needed;
5088 s.param_type = htons(SCTP_UNRECOG_PARAM);
5089 s.param_length = htons(sizeof(s) + plen);
5090 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5091 err_at += sizeof(s);
5092 if (plen > sizeof(tempbuf)) {
5093 plen = sizeof(tempbuf);
5095 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5097 sctp_m_freem(op_err);
5099 * we are out of memory but
5100 * we still need to have a
5101 * look at what to do (the
5102 * system is in trouble
5106 goto more_processing;
5108 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5113 if ((ptype & 0x8000) == 0x0000) {
5114 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5117 /* skip this chunk and continue processing */
5118 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5119 at += SCTP_SIZE32(plen);
5124 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5128 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5129 *abort_processing = 1;
5130 if ((op_err == NULL) && phdr) {
5134 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5136 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5138 l_len += (2 * sizeof(struct sctp_paramhdr));
5139 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5141 SCTP_BUF_LEN(op_err) = 0;
5143 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5145 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5147 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5148 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5151 if ((op_err) && phdr) {
5152 struct sctp_paramhdr s;
5155 uint32_t cpthis = 0;
5157 pad_needed = 4 - (err_at % 4);
5158 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5159 err_at += pad_needed;
5161 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5162 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5163 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5164 err_at += sizeof(s);
5165 /* Only copy back the p-hdr that caused the issue */
5166 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5172 sctp_are_there_new_addresses(struct sctp_association *asoc,
5173 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5176 * Given a INIT packet, look through the packet to verify that there
5177 * are NO new addresses. As we go through the parameters add reports
5178 * of any un-understood parameters that require an error. Also we
5179 * must return (1) to drop the packet if we see a un-understood
5180 * parameter that tells us to drop the chunk.
5182 struct sockaddr *sa_touse;
5183 struct sockaddr *sa;
5184 struct sctp_paramhdr *phdr, params;
5185 uint16_t ptype, plen;
5187 struct sctp_nets *net;
5190 struct sockaddr_in sin4, *sa4;
5194 struct sockaddr_in6 sin6, *sa6;
5199 memset(&sin4, 0, sizeof(sin4));
5200 sin4.sin_family = AF_INET;
5201 sin4.sin_len = sizeof(sin4);
5204 memset(&sin6, 0, sizeof(sin6));
5205 sin6.sin6_family = AF_INET6;
5206 sin6.sin6_len = sizeof(sin6);
5208 /* First what about the src address of the pkt ? */
5210 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5211 sa = (struct sockaddr *)&net->ro._l_addr;
5212 if (sa->sa_family == src->sa_family) {
5214 if (sa->sa_family == AF_INET) {
5215 struct sockaddr_in *src4;
5217 sa4 = (struct sockaddr_in *)sa;
5218 src4 = (struct sockaddr_in *)src;
5219 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5226 if (sa->sa_family == AF_INET6) {
5227 struct sockaddr_in6 *src6;
5229 sa6 = (struct sockaddr_in6 *)sa;
5230 src6 = (struct sockaddr_in6 *)src;
5231 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5240 /* New address added! no need to look futher. */
5243 /* Ok so far lets munge through the rest of the packet */
5244 offset += sizeof(struct sctp_init_chunk);
5245 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5248 ptype = ntohs(phdr->param_type);
5249 plen = ntohs(phdr->param_length);
5252 case SCTP_IPV4_ADDRESS:
5254 struct sctp_ipv4addr_param *p4, p4_buf;
5256 phdr = sctp_get_next_param(in_initpkt, offset,
5257 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5258 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5262 p4 = (struct sctp_ipv4addr_param *)phdr;
5263 sin4.sin_addr.s_addr = p4->addr;
5264 sa_touse = (struct sockaddr *)&sin4;
5269 case SCTP_IPV6_ADDRESS:
5271 struct sctp_ipv6addr_param *p6, p6_buf;
5273 phdr = sctp_get_next_param(in_initpkt, offset,
5274 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5275 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5279 p6 = (struct sctp_ipv6addr_param *)phdr;
5280 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5282 sa_touse = (struct sockaddr *)&sin6;
5291 /* ok, sa_touse points to one to check */
5293 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5294 sa = (struct sockaddr *)&net->ro._l_addr;
5295 if (sa->sa_family != sa_touse->sa_family) {
5299 if (sa->sa_family == AF_INET) {
5300 sa4 = (struct sockaddr_in *)sa;
5301 if (sa4->sin_addr.s_addr ==
5302 sin4.sin_addr.s_addr) {
5309 if (sa->sa_family == AF_INET6) {
5310 sa6 = (struct sockaddr_in6 *)sa;
5311 if (SCTP6_ARE_ADDR_EQUAL(
5320 /* New addr added! no need to look further */
5324 offset += SCTP_SIZE32(plen);
5325 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5331 * Given a MBUF chain that was sent into us containing an INIT. Build a
5332 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5333 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5334 * message (i.e. the struct sctp_init_msg).
5337 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5338 struct mbuf *init_pkt, int iphlen, int offset,
5339 struct sockaddr *src, struct sockaddr *dst,
5340 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5341 uint8_t use_mflowid, uint32_t mflowid,
5342 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5344 struct sctp_association *asoc;
5345 struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last;
5346 struct sctp_init_ack_chunk *initack;
5347 struct sctp_adaptation_layer_indication *ali;
5348 struct sctp_ecn_supported_param *ecn;
5349 struct sctp_prsctp_supported_param *prsctp;
5350 struct sctp_supported_chunk_types_param *pr_supported;
5351 union sctp_sockstore *over_addr;
5354 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5355 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5356 struct sockaddr_in *sin;
5360 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5361 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5362 struct sockaddr_in6 *sin6;
5365 struct sockaddr *to;
5366 struct sctp_state_cookie stc;
5367 struct sctp_nets *net = NULL;
5368 uint8_t *signature = NULL;
5369 int cnt_inits_to = 0;
5370 uint16_t his_limit, i_want;
5371 int abort_flag, padval;
5374 int nat_friendly = 0;
5383 if ((asoc != NULL) &&
5384 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5385 (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) {
5386 /* new addresses, out of here in non-cookie-wait states */
5388 * Send a ABORT, we don't add the new address error clause
5389 * though we even set the T bit and copy in the 0 tag.. this
5390 * looks no different than if no listener was present.
5392 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, NULL,
5393 use_mflowid, mflowid,
5398 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5399 (offset + sizeof(struct sctp_init_chunk)),
5400 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5403 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5404 init_chk->init.initiate_tag, op_err,
5405 use_mflowid, mflowid,
5409 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
5411 /* No memory, INIT timer will re-attempt. */
5413 sctp_m_freem(op_err);
5416 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
5419 * We might not overwrite the identification[] completely and on
5420 * some platforms time_entered will contain some padding. Therefore
5421 * zero out the cookie to avoid putting uninitialized memory on the
5424 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5426 /* the time I built cookie */
5427 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5429 /* populate any tie tags */
5431 /* unlock before tag selections */
5432 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5433 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5434 stc.cookie_life = asoc->cookie_life;
5435 net = asoc->primary_destination;
5437 stc.tie_tag_my_vtag = 0;
5438 stc.tie_tag_peer_vtag = 0;
5439 /* life I will award this cookie */
5440 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5443 /* copy in the ports for later check */
5444 stc.myport = sh->dest_port;
5445 stc.peerport = sh->src_port;
5448 * If we wanted to honor cookie life extentions, we would add to
5449 * stc.cookie_life. For now we should NOT honor any extension
5451 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5452 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5453 stc.ipv6_addr_legal = 1;
5454 if (SCTP_IPV6_V6ONLY(inp)) {
5455 stc.ipv4_addr_legal = 0;
5457 stc.ipv4_addr_legal = 1;
5460 stc.ipv6_addr_legal = 0;
5461 stc.ipv4_addr_legal = 1;
5463 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5470 switch (dst->sa_family) {
5474 /* lookup address */
5475 stc.address[0] = src4->sin_addr.s_addr;
5479 stc.addr_type = SCTP_IPV4_ADDRESS;
5480 /* local from address */
5481 stc.laddress[0] = dst4->sin_addr.s_addr;
5482 stc.laddress[1] = 0;
5483 stc.laddress[2] = 0;
5484 stc.laddress[3] = 0;
5485 stc.laddr_type = SCTP_IPV4_ADDRESS;
5486 /* scope_id is only for v6 */
5488 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5489 if (IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) {
5494 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5495 /* Must use the address in this case */
5496 if (sctp_is_address_on_local_host(src, vrf_id)) {
5497 stc.loopback_scope = 1;
5500 stc.local_scope = 0;
5508 stc.addr_type = SCTP_IPV6_ADDRESS;
5509 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5510 stc.scope_id = in6_getscope(&src6->sin6_addr);
5511 if (sctp_is_address_on_local_host(src, vrf_id)) {
5512 stc.loopback_scope = 1;
5513 stc.local_scope = 0;
5516 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr)) {
5518 * If the new destination is a
5519 * LINK_LOCAL we must have common
5520 * both site and local scope. Don't
5521 * set local scope though since we
5522 * must depend on the source to be
5523 * added implicitly. We cannot
5524 * assure just because we share one
5525 * link that all links are common.
5527 stc.local_scope = 0;
5531 * we start counting for the private
5532 * address stuff at 1. since the
5533 * link local we source from won't
5534 * show up in our scoped count.
5538 * pull out the scope_id from
5541 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr)) {
5543 * If the new destination is
5544 * SITE_LOCAL then we must have site
5549 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5550 stc.laddr_type = SCTP_IPV6_ADDRESS;
5560 /* set the scope per the existing tcb */
5563 struct sctp_nets *lnet;
5567 stc.loopback_scope = asoc->scope.loopback_scope;
5568 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5569 stc.site_scope = asoc->scope.site_scope;
5570 stc.local_scope = asoc->scope.local_scope;
5572 /* Why do we not consider IPv4 LL addresses? */
5573 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5574 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5575 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5577 * if we have a LL address, start
5585 /* use the net pointer */
5586 to = (struct sockaddr *)&net->ro._l_addr;
5587 switch (to->sa_family) {
5590 sin = (struct sockaddr_in *)to;
5591 stc.address[0] = sin->sin_addr.s_addr;
5595 stc.addr_type = SCTP_IPV4_ADDRESS;
5596 if (net->src_addr_selected == 0) {
5598 * strange case here, the INIT should have
5599 * did the selection.
5601 net->ro._s_addr = sctp_source_address_selection(inp,
5602 stcb, (sctp_route_t *) & net->ro,
5604 if (net->ro._s_addr == NULL)
5607 net->src_addr_selected = 1;
5610 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5611 stc.laddress[1] = 0;
5612 stc.laddress[2] = 0;
5613 stc.laddress[3] = 0;
5614 stc.laddr_type = SCTP_IPV4_ADDRESS;
5615 /* scope_id is only for v6 */
5621 sin6 = (struct sockaddr_in6 *)to;
5622 memcpy(&stc.address, &sin6->sin6_addr,
5623 sizeof(struct in6_addr));
5624 stc.addr_type = SCTP_IPV6_ADDRESS;
5625 stc.scope_id = sin6->sin6_scope_id;
5626 if (net->src_addr_selected == 0) {
5628 * strange case here, the INIT should have
5629 * done the selection.
5631 net->ro._s_addr = sctp_source_address_selection(inp,
5632 stcb, (sctp_route_t *) & net->ro,
5634 if (net->ro._s_addr == NULL)
5637 net->src_addr_selected = 1;
5639 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5640 sizeof(struct in6_addr));
5641 stc.laddr_type = SCTP_IPV6_ADDRESS;
5646 /* Now lets put the SCTP header in place */
5647 initack = mtod(m, struct sctp_init_ack_chunk *);
5648 /* Save it off for quick ref */
5649 stc.peers_vtag = init_chk->init.initiate_tag;
5651 memcpy(stc.identification, SCTP_VERSION_STRING,
5652 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5653 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5654 /* now the chunk header */
5655 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5656 initack->ch.chunk_flags = 0;
5657 /* fill in later from mbuf we build */
5658 initack->ch.chunk_length = 0;
5659 /* place in my tag */
5660 if ((asoc != NULL) &&
5661 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5662 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5663 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5664 /* re-use the v-tags and init-seq here */
5665 initack->init.initiate_tag = htonl(asoc->my_vtag);
5666 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5668 uint32_t vtag, itsn;
5670 if (hold_inp_lock) {
5671 SCTP_INP_INCR_REF(inp);
5672 SCTP_INP_RUNLOCK(inp);
5675 atomic_add_int(&asoc->refcnt, 1);
5676 SCTP_TCB_UNLOCK(stcb);
5678 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5679 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5681 * Got a duplicate vtag on some guy behind a
5682 * nat make sure we don't use it.
5686 initack->init.initiate_tag = htonl(vtag);
5687 /* get a TSN to use too */
5688 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5689 initack->init.initial_tsn = htonl(itsn);
5690 SCTP_TCB_LOCK(stcb);
5691 atomic_add_int(&asoc->refcnt, -1);
5693 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5694 initack->init.initiate_tag = htonl(vtag);
5695 /* get a TSN to use too */
5696 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5698 if (hold_inp_lock) {
5699 SCTP_INP_RLOCK(inp);
5700 SCTP_INP_DECR_REF(inp);
5703 /* save away my tag to */
5704 stc.my_vtag = initack->init.initiate_tag;
5706 /* set up some of the credits. */
5707 so = inp->sctp_socket;
5709 /* memory problem */
5713 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5715 /* set what I want */
5716 his_limit = ntohs(init_chk->init.num_inbound_streams);
5717 /* choose what I want */
5719 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5720 i_want = asoc->streamoutcnt;
5722 i_want = inp->sctp_ep.pre_open_stream_count;
5725 i_want = inp->sctp_ep.pre_open_stream_count;
5727 if (his_limit < i_want) {
5728 /* I Want more :< */
5729 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5731 /* I can have what I want :> */
5732 initack->init.num_outbound_streams = htons(i_want);
5734 /* tell him his limit. */
5735 initack->init.num_inbound_streams =
5736 htons(inp->sctp_ep.max_open_streams_intome);
5738 /* adaptation layer indication parameter */
5739 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5740 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack));
5741 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5742 ali->ph.param_length = htons(sizeof(*ali));
5743 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
5744 SCTP_BUF_LEN(m) += sizeof(*ali);
5745 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
5747 ecn = (struct sctp_ecn_supported_param *)((caddr_t)initack + sizeof(*initack));
5751 if (((asoc != NULL) && (asoc->ecn_allowed == 1)) ||
5752 (inp->sctp_ecn_enable == 1)) {
5753 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
5754 ecn->ph.param_length = htons(sizeof(*ecn));
5755 SCTP_BUF_LEN(m) += sizeof(*ecn);
5757 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
5760 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
5762 /* And now tell the peer we do pr-sctp */
5763 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
5764 prsctp->ph.param_length = htons(sizeof(*prsctp));
5765 SCTP_BUF_LEN(m) += sizeof(*prsctp);
5767 /* Add NAT friendly parameter */
5768 struct sctp_paramhdr *ph;
5770 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5771 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5772 ph->param_length = htons(sizeof(struct sctp_paramhdr));
5773 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
5775 /* And now tell the peer we do all the extensions */
5776 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5777 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5779 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5780 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5781 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5782 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5783 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5784 if (!SCTP_BASE_SYSCTL(sctp_auth_disable))
5785 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5786 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
5787 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5788 p_len = sizeof(*pr_supported) + num_ext;
5789 pr_supported->ph.param_length = htons(p_len);
5790 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
5791 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5793 /* add authentication parameters */
5794 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
5795 struct sctp_auth_random *randp;
5796 struct sctp_auth_hmac_algo *hmacs;
5797 struct sctp_auth_chunk_list *chunks;
5798 uint16_t random_len;
5800 /* generate and add RANDOM parameter */
5801 random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5802 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5803 randp->ph.param_type = htons(SCTP_RANDOM);
5804 p_len = sizeof(*randp) + random_len;
5805 randp->ph.param_length = htons(p_len);
5806 SCTP_READ_RANDOM(randp->random_data, random_len);
5807 /* zero out any padding required */
5808 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
5809 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5811 /* add HMAC_ALGO parameter */
5812 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5813 p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5814 (uint8_t *) hmacs->hmac_ids);
5816 p_len += sizeof(*hmacs);
5817 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5818 hmacs->ph.param_length = htons(p_len);
5819 /* zero out any padding required */
5820 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
5821 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5823 /* add CHUNKS parameter */
5824 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5825 p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5826 chunks->chunk_types);
5828 p_len += sizeof(*chunks);
5829 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5830 chunks->ph.param_length = htons(p_len);
5831 /* zero out any padding required */
5832 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
5833 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5837 /* now the addresses */
5839 struct sctp_scoping scp;
5842 * To optimize this we could put the scoping stuff into a
5843 * structure and remove the individual uint8's from the stc
5844 * structure. Then we could just sifa in the address within
5845 * the stc.. but for now this is a quick hack to get the
5846 * address stuff teased apart.
5848 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5849 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5850 scp.loopback_scope = stc.loopback_scope;
5851 scp.ipv4_local_scope = stc.ipv4_scope;
5852 scp.local_scope = stc.local_scope;
5853 scp.site_scope = stc.site_scope;
5854 m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to, NULL, NULL);
5857 /* tack on the operational error if present */
5866 llen += SCTP_BUF_LEN(ol);
5867 ol = SCTP_BUF_NEXT(ol);
5870 /* must add a pad to the param */
5871 uint32_t cpthis = 0;
5874 padlen = 4 - (llen % 4);
5875 m_copyback(op_err, llen, padlen, (caddr_t)&cpthis);
5877 while (SCTP_BUF_NEXT(m_at) != NULL) {
5878 m_at = SCTP_BUF_NEXT(m_at);
5880 SCTP_BUF_NEXT(m_at) = op_err;
5881 while (SCTP_BUF_NEXT(m_at) != NULL) {
5882 m_at = SCTP_BUF_NEXT(m_at);
5885 /* pre-calulate the size and update pkt header and chunk header */
5887 for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5888 p_len += SCTP_BUF_LEN(m_tmp);
5889 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5890 /* m_tmp should now point to last one */
5895 /* Now we must build a cookie */
5896 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
5897 if (m_cookie == NULL) {
5898 /* memory problem */
5902 /* Now append the cookie to the end and update the space/size */
5903 SCTP_BUF_NEXT(m_tmp) = m_cookie;
5905 for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5906 p_len += SCTP_BUF_LEN(m_tmp);
5907 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5908 /* m_tmp should now point to last one */
5914 * Place in the size, but we don't include the last pad (if any) in
5917 initack->ch.chunk_length = htons(p_len);
5920 * Time to sign the cookie, we don't sign over the cookie signature
5921 * though thus we set trailer.
5923 (void)sctp_hmac_m(SCTP_HMAC,
5924 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
5925 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
5926 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
5928 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
5929 * here since the timer will drive a retranmission.
5932 if ((padval) && (mp_last)) {
5933 /* see my previous comments on mp_last */
5934 if (sctp_add_pad_tombuf(mp_last, (4 - padval))) {
5935 /* Houston we have a problem, no space */
5940 if (stc.loopback_scope) {
5941 over_addr = (union sctp_sockstore *)dst;
5946 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
5948 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
5950 use_mflowid, mflowid,
5951 SCTP_SO_NOT_LOCKED);
5952 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
5957 sctp_prune_prsctp(struct sctp_tcb *stcb,
5958 struct sctp_association *asoc,
5959 struct sctp_sndrcvinfo *srcv,
5963 struct sctp_tmit_chunk *chk, *nchk;
5965 SCTP_TCB_LOCK_ASSERT(stcb);
5966 if ((asoc->peer_supports_prsctp) &&
5967 (asoc->sent_queue_cnt_removeable > 0)) {
5968 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
5970 * Look for chunks marked with the PR_SCTP flag AND
5971 * the buffer space flag. If the one being sent is
5972 * equal or greater priority then purge the old one
5973 * and free some space.
5975 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
5977 * This one is PR-SCTP AND buffer space
5980 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
5982 * Lower numbers equates to higher
5983 * priority so if the one we are
5984 * looking at has a larger or equal
5985 * priority we want to drop the data
5986 * and NOT retransmit it.
5990 * We release the book_size
5991 * if the mbuf is here
5996 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6000 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6003 freed_spc += ret_spc;
6004 if (freed_spc >= dataout) {
6007 } /* if chunk was present */
6008 } /* if of sufficent priority */
6009 } /* if chunk has enabled */
6010 } /* tailqforeach */
6012 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6013 /* Here we must move to the sent queue and mark */
6014 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6015 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6018 * We release the book_size
6019 * if the mbuf is here
6023 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6026 freed_spc += ret_spc;
6027 if (freed_spc >= dataout) {
6030 } /* end if chk->data */
6031 } /* end if right class */
6032 } /* end if chk pr-sctp */
6033 } /* tailqforeachsafe (chk) */
6034 } /* if enabled in asoc */
6038 sctp_get_frag_point(struct sctp_tcb *stcb,
6039 struct sctp_association *asoc)
6044 * For endpoints that have both v6 and v4 addresses we must reserve
6045 * room for the ipv6 header, for those that are only dealing with V4
6046 * we use a larger frag point.
6048 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6049 ovh = SCTP_MED_OVERHEAD;
6051 ovh = SCTP_MED_V4_OVERHEAD;
6054 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6055 siz = asoc->smallest_mtu - ovh;
6057 siz = (stcb->asoc.sctp_frag_point - ovh);
6059 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6061 /* A data chunk MUST fit in a cluster */
6062 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6065 /* adjust for an AUTH chunk if DATA requires auth */
6066 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6067 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6070 /* make it an even word boundary please */
6077 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6081 * We assume that the user wants PR_SCTP_TTL if the user provides a
6082 * positive lifetime but does not specify any PR_SCTP policy. This
6083 * is a BAD assumption and causes problems at least with the
6084 * U-Vancovers MPI folks. I will change this to be no policy means
6087 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6088 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6093 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6094 case CHUNK_FLAGS_PR_SCTP_BUF:
6096 * Time to live is a priority stored in tv_sec when doing
6097 * the buffer drop thing.
6099 sp->ts.tv_sec = sp->timetolive;
6102 case CHUNK_FLAGS_PR_SCTP_TTL:
6106 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6107 tv.tv_sec = sp->timetolive / 1000;
6108 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6110 * TODO sctp_constants.h needs alternative time
6111 * macros when _KERNEL is undefined.
6113 timevaladd(&sp->ts, &tv);
6116 case CHUNK_FLAGS_PR_SCTP_RTX:
6118 * Time to live is a the number or retransmissions stored in
6121 sp->ts.tv_sec = sp->timetolive;
6125 SCTPDBG(SCTP_DEBUG_USRREQ1,
6126 "Unknown PR_SCTP policy %u.\n",
6127 PR_SCTP_POLICY(sp->sinfo_flags));
6133 sctp_msg_append(struct sctp_tcb *stcb,
6134 struct sctp_nets *net,
6136 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6140 struct sctp_stream_queue_pending *sp = NULL;
6141 struct sctp_stream_out *strm;
6144 * Given an mbuf chain, put it into the association send queue and
6145 * place it on the wheel
6147 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6148 /* Invalid stream number */
6149 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6153 if ((stcb->asoc.stream_locked) &&
6154 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6155 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6159 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6160 /* Now can we send this? */
6161 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6162 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6163 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6164 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6165 /* got data while shutting down */
6166 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6170 sctp_alloc_a_strmoq(stcb, sp);
6172 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6176 sp->sinfo_flags = srcv->sinfo_flags;
6177 sp->timetolive = srcv->sinfo_timetolive;
6178 sp->ppid = srcv->sinfo_ppid;
6179 sp->context = srcv->sinfo_context;
6180 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6182 atomic_add_int(&sp->net->ref_count, 1);
6186 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6187 sp->stream = srcv->sinfo_stream;
6188 sp->msg_is_complete = 1;
6189 sp->sender_all_done = 1;
6192 sp->tail_mbuf = NULL;
6193 sctp_set_prsctp_policy(sp);
6195 * We could in theory (for sendall) sifa the length in, but we would
6196 * still have to hunt through the chain since we need to setup the
6200 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6201 if (SCTP_BUF_NEXT(at) == NULL)
6203 sp->length += SCTP_BUF_LEN(at);
6205 if (srcv->sinfo_keynumber_valid) {
6206 sp->auth_keyid = srcv->sinfo_keynumber;
6208 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6210 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6211 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6212 sp->holds_key_ref = 1;
6214 if (hold_stcb_lock == 0) {
6215 SCTP_TCB_SEND_LOCK(stcb);
6217 sctp_snd_sb_alloc(stcb, sp->length);
6218 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6219 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6220 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6222 if (hold_stcb_lock == 0) {
6223 SCTP_TCB_SEND_UNLOCK(stcb);
6233 static struct mbuf *
6234 sctp_copy_mbufchain(struct mbuf *clonechain,
6235 struct mbuf *outchain,
6236 struct mbuf **endofchain,
6239 uint8_t copy_by_ref)
6242 struct mbuf *appendchain;
6246 if (endofchain == NULL) {
6250 sctp_m_freem(outchain);
6253 if (can_take_mbuf) {
6254 appendchain = clonechain;
6257 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6259 /* Its not in a cluster */
6260 if (*endofchain == NULL) {
6261 /* lets get a mbuf cluster */
6262 if (outchain == NULL) {
6263 /* This is the general case */
6265 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6266 if (outchain == NULL) {
6269 SCTP_BUF_LEN(outchain) = 0;
6270 *endofchain = outchain;
6271 /* get the prepend space */
6272 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6275 * We really should not get a NULL
6281 if (SCTP_BUF_NEXT(m) == NULL) {
6285 m = SCTP_BUF_NEXT(m);
6288 if (*endofchain == NULL) {
6290 * huh, TSNH XXX maybe we
6293 sctp_m_freem(outchain);
6297 /* get the new end of length */
6298 len = M_TRAILINGSPACE(*endofchain);
6300 /* how much is left at the end? */
6301 len = M_TRAILINGSPACE(*endofchain);
6303 /* Find the end of the data, for appending */
6304 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6306 /* Now lets copy it out */
6307 if (len >= sizeofcpy) {
6308 /* It all fits, copy it in */
6309 m_copydata(clonechain, 0, sizeofcpy, cp);
6310 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6312 /* fill up the end of the chain */
6314 m_copydata(clonechain, 0, len, cp);
6315 SCTP_BUF_LEN((*endofchain)) += len;
6316 /* now we need another one */
6319 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6324 SCTP_BUF_NEXT((*endofchain)) = m;
6326 cp = mtod((*endofchain), caddr_t);
6327 m_copydata(clonechain, len, sizeofcpy, cp);
6328 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6332 /* copy the old fashion way */
6333 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_DONTWAIT);
6334 #ifdef SCTP_MBUF_LOGGING
6335 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6338 for (mat = appendchain; mat; mat = SCTP_BUF_NEXT(mat)) {
6339 if (SCTP_BUF_IS_EXTENDED(mat)) {
6340 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6347 if (appendchain == NULL) {
6350 sctp_m_freem(outchain);
6354 /* tack on to the end */
6355 if (*endofchain != NULL) {
6356 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6360 if (SCTP_BUF_NEXT(m) == NULL) {
6361 SCTP_BUF_NEXT(m) = appendchain;
6364 m = SCTP_BUF_NEXT(m);
6368 * save off the end and update the end-chain postion
6372 if (SCTP_BUF_NEXT(m) == NULL) {
6376 m = SCTP_BUF_NEXT(m);
6380 /* save off the end and update the end-chain postion */
6383 if (SCTP_BUF_NEXT(m) == NULL) {
6387 m = SCTP_BUF_NEXT(m);
6389 return (appendchain);
6394 sctp_med_chunk_output(struct sctp_inpcb *inp,
6395 struct sctp_tcb *stcb,
6396 struct sctp_association *asoc,
6399 int control_only, int from_where,
6400 struct timeval *now, int *now_filled, int frag_point, int so_locked
6401 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6407 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6408 uint32_t val SCTP_UNUSED)
6410 struct sctp_copy_all *ca;
6413 int added_control = 0;
6414 int un_sent, do_chunk_output = 1;
6415 struct sctp_association *asoc;
6416 struct sctp_nets *net;
6418 ca = (struct sctp_copy_all *)ptr;
6419 if (ca->m == NULL) {
6422 if (ca->inp != inp) {
6426 if ((ca->m) && ca->sndlen) {
6427 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_DONTWAIT);
6429 /* can't copy so we are done */
6433 #ifdef SCTP_MBUF_LOGGING
6434 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6437 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6438 if (SCTP_BUF_IS_EXTENDED(mat)) {
6439 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6447 SCTP_TCB_LOCK_ASSERT(stcb);
6448 if (stcb->asoc.alternate) {
6449 net = stcb->asoc.alternate;
6451 net = stcb->asoc.primary_destination;
6453 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6454 /* Abort this assoc with m as the user defined reason */
6456 struct sctp_paramhdr *ph;
6458 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_DONTWAIT);
6460 ph = mtod(m, struct sctp_paramhdr *);
6461 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6462 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
6465 * We add one here to keep the assoc from
6466 * dis-appearing on us.
6468 atomic_add_int(&stcb->asoc.refcnt, 1);
6469 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6471 * sctp_abort_an_association calls sctp_free_asoc()
6472 * free association will NOT free it since we
6473 * incremented the refcnt .. we do this to prevent
6474 * it being freed and things getting tricky since we
6475 * could end up (from free_asoc) calling inpcb_free
6476 * which would get a recursive lock call to the
6477 * iterator lock.. But as a consequence of that the
6478 * stcb will return to us un-locked.. since
6479 * free_asoc returns with either no TCB or the TCB
6480 * unlocked, we must relock.. to unlock in the
6481 * iterator timer :-0
6483 SCTP_TCB_LOCK(stcb);
6484 atomic_add_int(&stcb->asoc.refcnt, -1);
6485 goto no_chunk_output;
6489 ret = sctp_msg_append(stcb, net, m,
6493 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6494 /* shutdown this assoc */
6497 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6499 if (TAILQ_EMPTY(&asoc->send_queue) &&
6500 TAILQ_EMPTY(&asoc->sent_queue) &&
6502 if (asoc->locked_on_sending) {
6506 * there is nothing queued to send, so I'm
6509 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6510 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6511 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6513 * only send SHUTDOWN the first time
6516 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6517 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6519 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6520 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6521 sctp_stop_timers_for_shutdown(stcb);
6522 sctp_send_shutdown(stcb, net);
6523 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6525 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6526 asoc->primary_destination);
6528 do_chunk_output = 0;
6532 * we still got (or just got) data to send,
6533 * so set SHUTDOWN_PENDING
6536 * XXX sockets draft says that SCTP_EOF
6537 * should be sent with no data. currently,
6538 * we will allow user data to be sent first
6539 * and move to SHUTDOWN-PENDING
6541 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6542 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6543 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6544 if (asoc->locked_on_sending) {
6546 * Locked to send out the
6549 struct sctp_stream_queue_pending *sp;
6551 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6553 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6554 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6557 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6558 if (TAILQ_EMPTY(&asoc->send_queue) &&
6559 TAILQ_EMPTY(&asoc->sent_queue) &&
6560 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6562 atomic_add_int(&stcb->asoc.refcnt, 1);
6563 sctp_abort_an_association(stcb->sctp_ep, stcb,
6564 NULL, SCTP_SO_NOT_LOCKED);
6565 atomic_add_int(&stcb->asoc.refcnt, -1);
6566 goto no_chunk_output;
6568 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6569 asoc->primary_destination);
6575 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6576 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6578 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6579 (stcb->asoc.total_flight > 0) &&
6580 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))
6582 do_chunk_output = 0;
6584 if (do_chunk_output)
6585 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6586 else if (added_control) {
6587 int num_out = 0, reason = 0, now_filled = 0;
6591 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6592 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6593 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6604 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6606 struct sctp_copy_all *ca;
6608 ca = (struct sctp_copy_all *)ptr;
6610 * Do a notify here? Kacheong suggests that the notify be done at
6611 * the send time.. so you would push up a notification if any send
6612 * failed. Don't know if this is feasable since the only failures we
6613 * have is "memory" related and if you cannot get an mbuf to send
6614 * the data you surely can't get an mbuf to send up to notify the
6615 * user you can't send the data :->
6618 /* now free everything */
6619 sctp_m_freem(ca->m);
6620 SCTP_FREE(ca, SCTP_M_COPYAL);
6624 #define MC_ALIGN(m, len) do { \
6625 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \
6630 static struct mbuf *
6631 sctp_copy_out_all(struct uio *uio, int len)
6633 struct mbuf *ret, *at;
6634 int left, willcpy, cancpy, error;
6636 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAIT, 1, MT_DATA);
6642 SCTP_BUF_LEN(ret) = 0;
6643 /* save space for the data chunk header */
6644 cancpy = M_TRAILINGSPACE(ret);
6645 willcpy = min(cancpy, left);
6648 /* Align data to the end */
6649 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6655 SCTP_BUF_LEN(at) = willcpy;
6656 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6659 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAIT, 1, MT_DATA);
6660 if (SCTP_BUF_NEXT(at) == NULL) {
6663 at = SCTP_BUF_NEXT(at);
6664 SCTP_BUF_LEN(at) = 0;
6665 cancpy = M_TRAILINGSPACE(at);
6666 willcpy = min(cancpy, left);
6673 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6674 struct sctp_sndrcvinfo *srcv)
6677 struct sctp_copy_all *ca;
6679 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6683 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6686 memset(ca, 0, sizeof(struct sctp_copy_all));
6690 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6693 * take off the sendall flag, it would be bad if we failed to do
6696 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6697 /* get length and mbuf chain */
6699 ca->sndlen = uio->uio_resid;
6700 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6701 if (ca->m == NULL) {
6702 SCTP_FREE(ca, SCTP_M_COPYAL);
6703 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6707 /* Gather the length of the send */
6713 ca->sndlen += SCTP_BUF_LEN(m);
6714 m = SCTP_BUF_NEXT(m);
6718 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6719 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6720 SCTP_ASOC_ANY_STATE,
6722 sctp_sendall_completes, inp, 1);
6724 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6725 SCTP_FREE(ca, SCTP_M_COPYAL);
6726 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6734 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6736 struct sctp_tmit_chunk *chk, *nchk;
6738 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6739 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6740 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6742 sctp_m_freem(chk->data);
6745 asoc->ctrl_queue_cnt--;
6746 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6752 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6754 struct sctp_association *asoc;
6755 struct sctp_tmit_chunk *chk, *nchk;
6756 struct sctp_asconf_chunk *acp;
6759 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6760 /* find SCTP_ASCONF chunk in queue */
6761 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6763 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6764 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6769 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6771 sctp_m_freem(chk->data);
6774 asoc->ctrl_queue_cnt--;
6775 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6782 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6783 struct sctp_association *asoc,
6784 struct sctp_tmit_chunk **data_list,
6786 struct sctp_nets *net)
6789 struct sctp_tmit_chunk *tp1;
6791 for (i = 0; i < bundle_at; i++) {
6792 /* off of the send queue */
6793 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6794 asoc->send_queue_cnt--;
6797 * Any chunk NOT 0 you zap the time chunk 0 gets
6798 * zapped or set based on if a RTO measurment is
6801 data_list[i]->do_rtt = 0;
6804 data_list[i]->sent_rcv_time = net->last_sent_time;
6805 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6806 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6807 if (data_list[i]->whoTo == NULL) {
6808 data_list[i]->whoTo = net;
6809 atomic_add_int(&net->ref_count, 1);
6811 /* on to the sent queue */
6812 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6813 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6814 struct sctp_tmit_chunk *tpp;
6816 /* need to move back */
6818 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6820 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6824 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6827 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6829 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6834 /* This does not lower until the cum-ack passes it */
6835 asoc->sent_queue_cnt++;
6836 if ((asoc->peers_rwnd <= 0) &&
6837 (asoc->total_flight == 0) &&
6839 /* Mark the chunk as being a window probe */
6840 SCTP_STAT_INCR(sctps_windowprobed);
6842 #ifdef SCTP_AUDITING_ENABLED
6843 sctp_audit_log(0xC2, 3);
6845 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6846 data_list[i]->snd_count = 1;
6847 data_list[i]->rec.data.chunk_was_revoked = 0;
6848 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6849 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6850 data_list[i]->whoTo->flight_size,
6851 data_list[i]->book_size,
6852 (uintptr_t) data_list[i]->whoTo,
6853 data_list[i]->rec.data.TSN_seq);
6855 sctp_flight_size_increase(data_list[i]);
6856 sctp_total_flight_increase(stcb, data_list[i]);
6857 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6858 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6859 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6861 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6862 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6863 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6864 /* SWS sender side engages */
6865 asoc->peers_rwnd = 0;
6868 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6869 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
6874 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
6875 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6880 struct sctp_tmit_chunk *chk, *nchk;
6882 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6883 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
6884 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
6885 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
6886 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
6887 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
6888 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
6889 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
6890 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
6891 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
6892 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
6893 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
6894 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
6895 /* Stray chunks must be cleaned up */
6897 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6899 sctp_m_freem(chk->data);
6902 asoc->ctrl_queue_cnt--;
6903 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
6904 asoc->fwd_tsn_cnt--;
6905 sctp_free_a_chunk(stcb, chk, so_locked);
6906 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
6907 /* special handling, we must look into the param */
6908 if (chk != asoc->str_reset) {
6909 goto clean_up_anyway;
6917 sctp_can_we_split_this(struct sctp_tcb *stcb,
6919 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
6922 * Make a decision on if I should split a msg into multiple parts.
6923 * This is only asked of incomplete messages.
6927 * If we are doing EEOR we need to always send it if its the
6928 * entire thing, since it might be all the guy is putting in
6931 if (goal_mtu >= length) {
6933 * If we have data outstanding,
6934 * we get another chance when the sack
6935 * arrives to transmit - wait for more data
6937 if (stcb->asoc.total_flight == 0) {
6939 * If nothing is in flight, we zero the
6947 /* You can fill the rest */
6952 * For those strange folk that make the send buffer
6953 * smaller than our fragmentation point, we can't
6954 * get a full msg in so we have to allow splitting.
6956 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
6959 if ((length <= goal_mtu) ||
6960 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
6961 /* Sub-optimial residual don't split in non-eeor mode. */
6965 * If we reach here length is larger than the goal_mtu. Do we wish
6966 * to split it for the sake of packet putting together?
6968 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
6969 /* Its ok to split it */
6970 return (min(goal_mtu, frag_point));
6972 /* Nope, can't split */
6978 sctp_move_to_outqueue(struct sctp_tcb *stcb,
6979 struct sctp_stream_out *strq,
6981 uint32_t frag_point,
6987 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6992 /* Move from the stream to the send_queue keeping track of the total */
6993 struct sctp_association *asoc;
6994 struct sctp_stream_queue_pending *sp;
6995 struct sctp_tmit_chunk *chk;
6996 struct sctp_data_chunk *dchkh;
6997 uint32_t to_move, length;
6998 uint8_t rcv_flags = 0;
7000 uint8_t send_lock_up = 0;
7002 SCTP_TCB_LOCK_ASSERT(stcb);
7005 /* sa_ignore FREED_MEMORY */
7006 sp = TAILQ_FIRST(&strq->outqueue);
7009 if (send_lock_up == 0) {
7010 SCTP_TCB_SEND_LOCK(stcb);
7013 sp = TAILQ_FIRST(&strq->outqueue);
7017 if (strq->last_msg_incomplete) {
7018 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7020 strq->last_msg_incomplete);
7021 strq->last_msg_incomplete = 0;
7025 SCTP_TCB_SEND_UNLOCK(stcb);
7030 if ((sp->msg_is_complete) && (sp->length == 0)) {
7031 if (sp->sender_all_done) {
7033 * We are doing differed cleanup. Last time through
7034 * when we took all the data the sender_all_done was
7037 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7038 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7039 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7040 sp->sender_all_done,
7042 sp->msg_is_complete,
7046 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7047 SCTP_TCB_SEND_LOCK(stcb);
7050 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7051 TAILQ_REMOVE(&strq->outqueue, sp, next);
7052 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7054 sctp_free_remote_addr(sp->net);
7058 sctp_m_freem(sp->data);
7061 sctp_free_a_strmoq(stcb, sp, so_locked);
7062 /* we can't be locked to it */
7064 stcb->asoc.locked_on_sending = NULL;
7066 SCTP_TCB_SEND_UNLOCK(stcb);
7069 /* back to get the next msg */
7073 * sender just finished this but still holds a
7082 /* is there some to get */
7083 if (sp->length == 0) {
7089 } else if (sp->discard_rest) {
7090 if (send_lock_up == 0) {
7091 SCTP_TCB_SEND_LOCK(stcb);
7094 /* Whack down the size */
7095 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7096 if ((stcb->sctp_socket != NULL) && \
7097 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7098 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7099 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7102 sctp_m_freem(sp->data);
7104 sp->tail_mbuf = NULL;
7114 some_taken = sp->some_taken;
7115 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7116 sp->msg_is_complete = 1;
7119 length = sp->length;
7120 if (sp->msg_is_complete) {
7121 /* The message is complete */
7122 to_move = min(length, frag_point);
7123 if (to_move == length) {
7124 /* All of it fits in the MTU */
7125 if (sp->some_taken) {
7126 rcv_flags |= SCTP_DATA_LAST_FRAG;
7127 sp->put_last_out = 1;
7129 rcv_flags |= SCTP_DATA_NOT_FRAG;
7130 sp->put_last_out = 1;
7133 /* Not all of it fits, we fragment */
7134 if (sp->some_taken == 0) {
7135 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7140 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7143 * We use a snapshot of length in case it
7144 * is expanding during the compare.
7149 if (to_move >= llen) {
7151 if (send_lock_up == 0) {
7153 * We are taking all of an incomplete msg
7154 * thus we need a send lock.
7156 SCTP_TCB_SEND_LOCK(stcb);
7158 if (sp->msg_is_complete) {
7160 * the sender finished the
7167 if (sp->some_taken == 0) {
7168 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7172 /* Nothing to take. */
7173 if (sp->some_taken) {
7182 /* If we reach here, we can copy out a chunk */
7183 sctp_alloc_a_chunk(stcb, chk);
7185 /* No chunk memory */
7191 * Setup for unordered if needed by looking at the user sent info
7194 if (sp->sinfo_flags & SCTP_UNORDERED) {
7195 rcv_flags |= SCTP_DATA_UNORDERED;
7197 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7198 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7199 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7201 /* clear out the chunk before setting up */
7202 memset(chk, 0, sizeof(*chk));
7203 chk->rec.data.rcv_flags = rcv_flags;
7205 if (to_move >= length) {
7206 /* we think we can steal the whole thing */
7207 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7208 SCTP_TCB_SEND_LOCK(stcb);
7211 if (to_move < sp->length) {
7212 /* bail, it changed */
7215 chk->data = sp->data;
7216 chk->last_mbuf = sp->tail_mbuf;
7217 /* register the stealing */
7218 sp->data = sp->tail_mbuf = NULL;
7223 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_DONTWAIT);
7224 chk->last_mbuf = NULL;
7225 if (chk->data == NULL) {
7226 sp->some_taken = some_taken;
7227 sctp_free_a_chunk(stcb, chk, so_locked);
7232 #ifdef SCTP_MBUF_LOGGING
7233 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7236 for (mat = chk->data; mat; mat = SCTP_BUF_NEXT(mat)) {
7237 if (SCTP_BUF_IS_EXTENDED(mat)) {
7238 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
7243 /* Pull off the data */
7244 m_adj(sp->data, to_move);
7245 /* Now lets work our way down and compact it */
7247 while (m && (SCTP_BUF_LEN(m) == 0)) {
7248 sp->data = SCTP_BUF_NEXT(m);
7249 SCTP_BUF_NEXT(m) = NULL;
7250 if (sp->tail_mbuf == m) {
7252 * Freeing tail? TSNH since
7253 * we supposedly were taking less
7254 * than the sp->length.
7257 panic("Huh, freing tail? - TSNH");
7259 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7260 sp->tail_mbuf = sp->data = NULL;
7269 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7270 chk->copy_by_ref = 1;
7272 chk->copy_by_ref = 0;
7275 * get last_mbuf and counts of mb useage This is ugly but hopefully
7276 * its only one mbuf.
7278 if (chk->last_mbuf == NULL) {
7279 chk->last_mbuf = chk->data;
7280 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7281 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7284 if (to_move > length) {
7285 /*- This should not happen either
7286 * since we always lower to_move to the size
7287 * of sp->length if its larger.
7290 panic("Huh, how can to_move be larger?");
7292 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7296 atomic_subtract_int(&sp->length, to_move);
7298 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7299 /* Not enough room for a chunk header, get some */
7302 m = sctp_get_mbuf_for_msg(1, 0, M_DONTWAIT, 0, MT_DATA);
7305 * we're in trouble here. _PREPEND below will free
7306 * all the data if there is no leading space, so we
7307 * must put the data back and restore.
7309 if (send_lock_up == 0) {
7310 SCTP_TCB_SEND_LOCK(stcb);
7313 if (chk->data == NULL) {
7314 /* unsteal the data */
7315 sp->data = chk->data;
7316 sp->tail_mbuf = chk->last_mbuf;
7320 /* reassemble the data */
7322 sp->data = chk->data;
7323 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7325 sp->some_taken = some_taken;
7326 atomic_add_int(&sp->length, to_move);
7329 sctp_free_a_chunk(stcb, chk, so_locked);
7333 SCTP_BUF_LEN(m) = 0;
7334 SCTP_BUF_NEXT(m) = chk->data;
7336 M_ALIGN(chk->data, 4);
7339 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT);
7340 if (chk->data == NULL) {
7341 /* HELP, TSNH since we assured it would not above? */
7343 panic("prepend failes HELP?");
7345 SCTP_PRINTF("prepend fails HELP?\n");
7346 sctp_free_a_chunk(stcb, chk, so_locked);
7352 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7353 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7354 chk->book_size_scale = 0;
7355 chk->sent = SCTP_DATAGRAM_UNSENT;
7358 chk->asoc = &stcb->asoc;
7359 chk->pad_inplace = 0;
7360 chk->no_fr_allowed = 0;
7361 chk->rec.data.stream_seq = strq->next_sequence_send;
7362 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7363 strq->next_sequence_send++;
7365 chk->rec.data.stream_number = sp->stream;
7366 chk->rec.data.payloadtype = sp->ppid;
7367 chk->rec.data.context = sp->context;
7368 chk->rec.data.doing_fast_retransmit = 0;
7370 chk->rec.data.timetodrop = sp->ts;
7371 chk->flags = sp->act_flags;
7374 chk->whoTo = sp->net;
7375 atomic_add_int(&chk->whoTo->ref_count, 1);
7379 if (sp->holds_key_ref) {
7380 chk->auth_keyid = sp->auth_keyid;
7381 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7382 chk->holds_key_ref = 1;
7384 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7385 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7386 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7387 (uintptr_t) stcb, sp->length,
7388 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7389 chk->rec.data.TSN_seq);
7391 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7393 * Put the rest of the things in place now. Size was done earlier in
7394 * previous loop prior to padding.
7397 #ifdef SCTP_ASOCLOG_OF_TSNS
7398 SCTP_TCB_LOCK_ASSERT(stcb);
7399 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7400 asoc->tsn_out_at = 0;
7401 asoc->tsn_out_wrapped = 1;
7403 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7404 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7405 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7406 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7407 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7408 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7409 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7410 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7414 dchkh->ch.chunk_type = SCTP_DATA;
7415 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7416 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7417 dchkh->dp.stream_id = htons(strq->stream_no);
7418 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7419 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7420 dchkh->ch.chunk_length = htons(chk->send_size);
7421 /* Now advance the chk->send_size by the actual pad needed. */
7422 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7427 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7428 if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) {
7429 chk->pad_inplace = 1;
7431 if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) {
7432 /* pad added an mbuf */
7433 chk->last_mbuf = lm;
7435 chk->send_size += pads;
7437 /* We only re-set the policy if it is on */
7438 if (sp->pr_sctp_on) {
7439 sctp_set_prsctp_policy(sp);
7440 asoc->pr_sctp_cnt++;
7441 chk->pr_sctp_on = 1;
7443 chk->pr_sctp_on = 0;
7445 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7446 /* All done pull and kill the message */
7447 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7448 if (sp->put_last_out == 0) {
7449 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7450 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7451 sp->sender_all_done,
7453 sp->msg_is_complete,
7457 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7458 SCTP_TCB_SEND_LOCK(stcb);
7461 TAILQ_REMOVE(&strq->outqueue, sp, next);
7462 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7464 sctp_free_remote_addr(sp->net);
7468 sctp_m_freem(sp->data);
7471 sctp_free_a_strmoq(stcb, sp, so_locked);
7473 /* we can't be locked to it */
7475 stcb->asoc.locked_on_sending = NULL;
7477 /* more to go, we are locked */
7480 asoc->chunks_on_out_queue++;
7481 strq->chunks_on_queues++;
7482 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7483 asoc->send_queue_cnt++;
7486 SCTP_TCB_SEND_UNLOCK(stcb);
7493 sctp_fill_outqueue(struct sctp_tcb *stcb,
7494 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7495 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7500 struct sctp_association *asoc;
7501 struct sctp_stream_out *strq;
7502 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7505 SCTP_TCB_LOCK_ASSERT(stcb);
7507 switch (net->ro._l_addr.sa.sa_family) {
7510 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7515 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7520 goal_mtu = net->mtu;
7523 /* Need an allowance for the data chunk header too */
7524 goal_mtu -= sizeof(struct sctp_data_chunk);
7526 /* must make even word boundary */
7527 goal_mtu &= 0xfffffffc;
7528 if (asoc->locked_on_sending) {
7529 /* We are stuck on one stream until the message completes. */
7530 strq = asoc->locked_on_sending;
7533 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7536 while ((goal_mtu > 0) && strq) {
7539 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7540 &giveup, eeor_mode, &bail, so_locked);
7542 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7545 asoc->locked_on_sending = strq;
7546 if ((moved_how_much == 0) || (giveup) || bail)
7547 /* no more to move for now */
7550 asoc->locked_on_sending = NULL;
7551 if ((giveup) || bail) {
7554 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7559 total_moved += moved_how_much;
7560 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7561 goal_mtu &= 0xfffffffc;
7566 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7568 if (total_moved == 0) {
7569 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7570 (net == stcb->asoc.primary_destination)) {
7571 /* ran dry for primary network net */
7572 SCTP_STAT_INCR(sctps_primary_randry);
7573 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7574 /* ran dry with CMT on */
7575 SCTP_STAT_INCR(sctps_cmt_randry);
7581 sctp_fix_ecn_echo(struct sctp_association *asoc)
7583 struct sctp_tmit_chunk *chk;
7585 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7586 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7587 chk->sent = SCTP_DATAGRAM_UNSENT;
7593 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7595 struct sctp_association *asoc;
7596 struct sctp_tmit_chunk *chk;
7597 struct sctp_stream_queue_pending *sp;
7604 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7605 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7606 if (sp->net == net) {
7607 sctp_free_remote_addr(sp->net);
7612 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7613 if (chk->whoTo == net) {
7614 sctp_free_remote_addr(chk->whoTo);
7621 sctp_med_chunk_output(struct sctp_inpcb *inp,
7622 struct sctp_tcb *stcb,
7623 struct sctp_association *asoc,
7626 int control_only, int from_where,
7627 struct timeval *now, int *now_filled, int frag_point, int so_locked
7628 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7634 * Ok this is the generic chunk service queue. we must do the
7635 * following: - Service the stream queue that is next, moving any
7636 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7637 * LAST to the out queue in one pass) and assigning TSN's - Check to
7638 * see if the cwnd/rwnd allows any output, if so we go ahead and
7639 * fomulate and send the low level chunks. Making sure to combine
7640 * any control in the control chunk queue also.
7642 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7643 struct mbuf *outchain, *endoutchain;
7644 struct sctp_tmit_chunk *chk, *nchk;
7646 /* temp arrays for unlinking */
7647 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7648 int no_fragmentflg, error;
7649 unsigned int max_rwnd_per_dest, max_send_per_dest;
7650 int one_chunk, hbflag, skip_data_for_this_net;
7651 int asconf, cookie, no_out_cnt;
7652 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7653 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7655 uint32_t auth_offset = 0;
7656 struct sctp_auth_chunk *auth = NULL;
7657 uint16_t auth_keyid;
7658 int override_ok = 1;
7659 int skip_fill_up = 0;
7660 int data_auth_reqd = 0;
7663 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7669 auth_keyid = stcb->asoc.authinfo.active_keyid;
7671 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7672 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7673 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7678 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7680 * First lets prime the pump. For each destination, if there is room
7681 * in the flight size, attempt to pull an MTU's worth out of the
7682 * stream queues into the general send_queue
7684 #ifdef SCTP_AUDITING_ENABLED
7685 sctp_audit_log(0xC2, 2);
7687 SCTP_TCB_LOCK_ASSERT(stcb);
7689 if ((control_only) || (asoc->stream_reset_outstanding))
7694 /* Nothing to possible to send? */
7695 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7696 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7697 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7698 TAILQ_EMPTY(&asoc->send_queue) &&
7699 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7704 if (asoc->peers_rwnd == 0) {
7705 /* No room in peers rwnd */
7707 if (asoc->total_flight > 0) {
7708 /* we are allowed one chunk in flight */
7712 if (stcb->asoc.ecn_echo_cnt_onq) {
7713 /* Record where a sack goes, if any */
7714 if (no_data_chunks &&
7715 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7716 /* Nothing but ECNe to send - we don't do that */
7717 goto nothing_to_send;
7719 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7720 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7721 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7722 sack_goes_to = chk->whoTo;
7727 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7728 if (stcb->sctp_socket)
7729 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7731 max_send_per_dest = 0;
7732 if (no_data_chunks == 0) {
7733 /* How many non-directed chunks are there? */
7734 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7735 if (chk->whoTo == NULL) {
7737 * We already have non-directed chunks on
7738 * the queue, no need to do a fill-up.
7746 if ((no_data_chunks == 0) &&
7747 (skip_fill_up == 0) &&
7748 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7749 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7751 * This for loop we are in takes in each net, if
7752 * its's got space in cwnd and has data sent to it
7753 * (when CMT is off) then it calls
7754 * sctp_fill_outqueue for the net. This gets data on
7755 * the send queue for that network.
7757 * In sctp_fill_outqueue TSN's are assigned and data is
7758 * copied out of the stream buffers. Note mostly
7759 * copy by reference (we hope).
7761 net->window_probe = 0;
7762 if ((net != stcb->asoc.alternate) &&
7763 ((net->dest_state & SCTP_ADDR_PF) ||
7764 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7765 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7766 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7767 sctp_log_cwnd(stcb, net, 1,
7768 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7772 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7773 (net->flight_size == 0)) {
7774 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7776 if (net->flight_size >= net->cwnd) {
7777 /* skip this network, no room - can't fill */
7778 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7779 sctp_log_cwnd(stcb, net, 3,
7780 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7784 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7785 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7787 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7789 /* memory alloc failure */
7795 /* now service each destination and send out what we can for it */
7796 /* Nothing to send? */
7797 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7798 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7799 TAILQ_EMPTY(&asoc->send_queue)) {
7803 if (asoc->sctp_cmt_on_off > 0) {
7804 /* get the last start point */
7805 start_at = asoc->last_net_cmt_send_started;
7806 if (start_at == NULL) {
7807 /* null so to beginning */
7808 start_at = TAILQ_FIRST(&asoc->nets);
7810 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7811 if (start_at == NULL) {
7812 start_at = TAILQ_FIRST(&asoc->nets);
7815 asoc->last_net_cmt_send_started = start_at;
7817 start_at = TAILQ_FIRST(&asoc->nets);
7819 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7820 if (chk->whoTo == NULL) {
7821 if (asoc->alternate) {
7822 chk->whoTo = asoc->alternate;
7824 chk->whoTo = asoc->primary_destination;
7826 atomic_add_int(&chk->whoTo->ref_count, 1);
7829 old_start_at = NULL;
7830 again_one_more_time:
7831 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7832 /* how much can we send? */
7833 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7834 if (old_start_at && (old_start_at == net)) {
7835 /* through list ocmpletely. */
7839 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7840 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7841 (net->flight_size >= net->cwnd)) {
7843 * Nothing on control or asconf and flight is full,
7844 * we can skip even in the CMT case.
7849 endoutchain = outchain = NULL;
7852 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7853 skip_data_for_this_net = 1;
7855 skip_data_for_this_net = 0;
7857 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7859 * if we have a route and an ifp check to see if we
7860 * have room to send to this guy
7864 ifp = net->ro.ro_rt->rt_ifp;
7865 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
7866 SCTP_STAT_INCR(sctps_ifnomemqueued);
7867 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
7868 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
7873 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7876 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
7881 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
7891 if (mtu > asoc->peers_rwnd) {
7892 if (asoc->total_flight > 0) {
7893 /* We have a packet in flight somewhere */
7894 r_mtu = asoc->peers_rwnd;
7896 /* We are always allowed to send one MTU out */
7903 /************************/
7904 /* ASCONF transmission */
7905 /************************/
7906 /* Now first lets go through the asconf queue */
7907 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
7908 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
7911 if (chk->whoTo == NULL) {
7912 if (asoc->alternate == NULL) {
7913 if (asoc->primary_destination != net) {
7917 if (asoc->alternate != net) {
7922 if (chk->whoTo != net) {
7926 if (chk->data == NULL) {
7929 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
7930 chk->sent != SCTP_DATAGRAM_RESEND) {
7934 * if no AUTH is yet included and this chunk
7935 * requires it, make sure to account for it. We
7936 * don't apply the size until the AUTH chunk is
7937 * actually added below in case there is no room for
7938 * this chunk. NOTE: we overload the use of "omtu"
7941 if ((auth == NULL) &&
7942 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
7943 stcb->asoc.peer_auth_chunks)) {
7944 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
7947 /* Here we do NOT factor the r_mtu */
7948 if ((chk->send_size < (int)(mtu - omtu)) ||
7949 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
7951 * We probably should glom the mbuf chain
7952 * from the chk->data for control but the
7953 * problem is it becomes yet one more level
7954 * of tracking to do if for some reason
7955 * output fails. Then I have got to
7956 * reconstruct the merged control chain.. el
7957 * yucko.. for now we take the easy way and
7961 * Add an AUTH chunk, if chunk requires it
7962 * save the offset into the chain for AUTH
7964 if ((auth == NULL) &&
7965 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
7966 stcb->asoc.peer_auth_chunks))) {
7967 outchain = sctp_add_auth_chunk(outchain,
7972 chk->rec.chunk_id.id);
7973 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
7975 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
7976 (int)chk->rec.chunk_id.can_take_data,
7977 chk->send_size, chk->copy_by_ref);
7978 if (outchain == NULL) {
7980 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
7983 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
7984 /* update our MTU size */
7985 if (mtu > (chk->send_size + omtu))
7986 mtu -= (chk->send_size + omtu);
7989 to_out += (chk->send_size + omtu);
7990 /* Do clear IP_DF ? */
7991 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
7994 if (chk->rec.chunk_id.can_take_data)
7997 * set hb flag since we can use these for
8003 * should sysctl this: don't bundle data
8004 * with ASCONF since it requires AUTH
8007 chk->sent = SCTP_DATAGRAM_SENT;
8008 if (chk->whoTo == NULL) {
8010 atomic_add_int(&net->ref_count, 1);
8015 * Ok we are out of room but we can
8016 * output without effecting the
8017 * flight size since this little guy
8018 * is a control only packet.
8020 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8022 * do NOT clear the asconf flag as
8023 * it is used to do appropriate
8024 * source address selection.
8026 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8027 (struct sockaddr *)&net->ro._l_addr,
8028 outchain, auth_offset, auth,
8029 stcb->asoc.authinfo.active_keyid,
8030 no_fragmentflg, 0, asconf,
8031 inp->sctp_lport, stcb->rport,
8032 htonl(stcb->asoc.peer_vtag),
8036 if (error == ENOBUFS) {
8037 asoc->ifp_had_enobuf = 1;
8038 SCTP_STAT_INCR(sctps_lowlevelerr);
8040 if (from_where == 0) {
8041 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8043 if (*now_filled == 0) {
8044 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8046 *now = net->last_sent_time;
8048 net->last_sent_time = *now;
8051 /* error, could not output */
8052 if (error == EHOSTUNREACH) {
8058 sctp_move_chunks_from_net(stcb, net);
8063 asoc->ifp_had_enobuf = 0;
8064 if (*now_filled == 0) {
8065 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8067 *now = net->last_sent_time;
8069 net->last_sent_time = *now;
8073 * increase the number we sent, if a
8074 * cookie is sent we don't tell them
8077 outchain = endoutchain = NULL;
8081 *num_out += ctl_cnt;
8082 /* recalc a clean slate and setup */
8083 switch (net->ro._l_addr.sa.sa_family) {
8086 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8091 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8104 /************************/
8105 /* Control transmission */
8106 /************************/
8107 /* Now first lets go through the control queue */
8108 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8109 if ((sack_goes_to) &&
8110 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8111 (chk->whoTo != sack_goes_to)) {
8113 * if we have a sack in queue, and we are
8114 * looking at an ecn echo that is NOT queued
8115 * to where the sack is going..
8117 if (chk->whoTo == net) {
8119 * Don't transmit it to where its
8120 * going (current net)
8123 } else if (sack_goes_to == net) {
8125 * But do transmit it to this
8128 goto skip_net_check;
8131 if (chk->whoTo == NULL) {
8132 if (asoc->alternate == NULL) {
8133 if (asoc->primary_destination != net) {
8137 if (asoc->alternate != net) {
8142 if (chk->whoTo != net) {
8147 if (chk->data == NULL) {
8150 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8152 * It must be unsent. Cookies and ASCONF's
8153 * hang around but there timers will force
8154 * when marked for resend.
8159 * if no AUTH is yet included and this chunk
8160 * requires it, make sure to account for it. We
8161 * don't apply the size until the AUTH chunk is
8162 * actually added below in case there is no room for
8163 * this chunk. NOTE: we overload the use of "omtu"
8166 if ((auth == NULL) &&
8167 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8168 stcb->asoc.peer_auth_chunks)) {
8169 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8172 /* Here we do NOT factor the r_mtu */
8173 if ((chk->send_size <= (int)(mtu - omtu)) ||
8174 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8176 * We probably should glom the mbuf chain
8177 * from the chk->data for control but the
8178 * problem is it becomes yet one more level
8179 * of tracking to do if for some reason
8180 * output fails. Then I have got to
8181 * reconstruct the merged control chain.. el
8182 * yucko.. for now we take the easy way and
8186 * Add an AUTH chunk, if chunk requires it
8187 * save the offset into the chain for AUTH
8189 if ((auth == NULL) &&
8190 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8191 stcb->asoc.peer_auth_chunks))) {
8192 outchain = sctp_add_auth_chunk(outchain,
8197 chk->rec.chunk_id.id);
8198 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8200 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8201 (int)chk->rec.chunk_id.can_take_data,
8202 chk->send_size, chk->copy_by_ref);
8203 if (outchain == NULL) {
8205 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8208 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8209 /* update our MTU size */
8210 if (mtu > (chk->send_size + omtu))
8211 mtu -= (chk->send_size + omtu);
8214 to_out += (chk->send_size + omtu);
8215 /* Do clear IP_DF ? */
8216 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8219 if (chk->rec.chunk_id.can_take_data)
8221 /* Mark things to be removed, if needed */
8222 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8223 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8224 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8225 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8226 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8227 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8228 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8229 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8230 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8231 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8232 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8233 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8236 /* remove these chunks at the end */
8237 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8238 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8239 /* turn off the timer */
8240 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8241 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8242 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8248 * Other chunks, since they have
8249 * timers running (i.e. COOKIE) we
8250 * just "trust" that it gets sent or
8254 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8257 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8259 * Increment ecne send count
8260 * here this means we may be
8261 * over-zealous in our
8262 * counting if the send
8263 * fails, but its the best
8264 * place to do it (we used
8265 * to do it in the queue of
8266 * the chunk, but that did
8267 * not tell how many times
8270 SCTP_STAT_INCR(sctps_sendecne);
8272 chk->sent = SCTP_DATAGRAM_SENT;
8273 if (chk->whoTo == NULL) {
8275 atomic_add_int(&net->ref_count, 1);
8281 * Ok we are out of room but we can
8282 * output without effecting the
8283 * flight size since this little guy
8284 * is a control only packet.
8287 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8289 * do NOT clear the asconf
8290 * flag as it is used to do
8291 * appropriate source
8292 * address selection.
8296 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8299 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8300 (struct sockaddr *)&net->ro._l_addr,
8303 stcb->asoc.authinfo.active_keyid,
8304 no_fragmentflg, 0, asconf,
8305 inp->sctp_lport, stcb->rport,
8306 htonl(stcb->asoc.peer_vtag),
8310 if (error == ENOBUFS) {
8311 asoc->ifp_had_enobuf = 1;
8312 SCTP_STAT_INCR(sctps_lowlevelerr);
8314 if (from_where == 0) {
8315 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8317 /* error, could not output */
8319 if (*now_filled == 0) {
8320 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8322 *now = net->last_sent_time;
8324 net->last_sent_time = *now;
8328 if (error == EHOSTUNREACH) {
8334 sctp_move_chunks_from_net(stcb, net);
8339 asoc->ifp_had_enobuf = 0;
8340 /* Only HB or ASCONF advances time */
8342 if (*now_filled == 0) {
8343 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8345 *now = net->last_sent_time;
8347 net->last_sent_time = *now;
8352 * increase the number we sent, if a
8353 * cookie is sent we don't tell them
8356 outchain = endoutchain = NULL;
8360 *num_out += ctl_cnt;
8361 /* recalc a clean slate and setup */
8362 switch (net->ro._l_addr.sa.sa_family) {
8365 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8370 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8383 /* JRI: if dest is in PF state, do not send data to it */
8384 if ((asoc->sctp_cmt_on_off > 0) &&
8385 (net != stcb->asoc.alternate) &&
8386 (net->dest_state & SCTP_ADDR_PF)) {
8389 if (net->flight_size >= net->cwnd) {
8392 if ((asoc->sctp_cmt_on_off > 0) &&
8393 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8394 (net->flight_size > max_rwnd_per_dest)) {
8398 * We need a specific accounting for the usage of the send
8399 * buffer. We also need to check the number of messages per
8400 * net. For now, this is better than nothing and it disabled
8403 if ((asoc->sctp_cmt_on_off > 0) &&
8404 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8405 (max_send_per_dest > 0) &&
8406 (net->flight_size > max_send_per_dest)) {
8409 /*********************/
8410 /* Data transmission */
8411 /*********************/
8413 * if AUTH for DATA is required and no AUTH has been added
8414 * yet, account for this in the mtu now... if no data can be
8415 * bundled, this adjustment won't matter anyways since the
8416 * packet will be going out...
8418 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8419 stcb->asoc.peer_auth_chunks);
8420 if (data_auth_reqd && (auth == NULL)) {
8421 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8423 /* now lets add any data within the MTU constraints */
8424 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8427 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8428 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8435 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8436 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8446 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8447 (skip_data_for_this_net == 0)) ||
8449 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8450 if (no_data_chunks) {
8451 /* let only control go out */
8455 if (net->flight_size >= net->cwnd) {
8456 /* skip this net, no room for data */
8460 if ((chk->whoTo != NULL) &&
8461 (chk->whoTo != net)) {
8462 /* Don't send the chunk on this net */
8465 if (asoc->sctp_cmt_on_off == 0) {
8466 if ((asoc->alternate) &&
8467 (asoc->alternate != net) &&
8468 (chk->whoTo == NULL)) {
8470 } else if ((net != asoc->primary_destination) &&
8471 (asoc->alternate == NULL) &&
8472 (chk->whoTo == NULL)) {
8476 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8478 * strange, we have a chunk that is
8479 * to big for its destination and
8480 * yet no fragment ok flag.
8481 * Something went wrong when the
8482 * PMTU changed...we did not mark
8483 * this chunk for some reason?? I
8484 * will fix it here by letting IP
8485 * fragment it for now and printing
8486 * a warning. This really should not
8489 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8490 chk->send_size, mtu);
8491 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8493 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8494 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8495 struct sctp_data_chunk *dchkh;
8497 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8498 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8500 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8501 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8502 /* ok we will add this one */
8505 * Add an AUTH chunk, if chunk
8506 * requires it, save the offset into
8507 * the chain for AUTH
8509 if (data_auth_reqd) {
8511 outchain = sctp_add_auth_chunk(outchain,
8517 auth_keyid = chk->auth_keyid;
8519 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8520 } else if (override_ok) {
8525 auth_keyid = chk->auth_keyid;
8527 } else if (auth_keyid != chk->auth_keyid) {
8535 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8536 chk->send_size, chk->copy_by_ref);
8537 if (outchain == NULL) {
8538 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8539 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8540 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8543 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8546 /* upate our MTU size */
8547 /* Do clear IP_DF ? */
8548 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8551 /* unsigned subtraction of mtu */
8552 if (mtu > chk->send_size)
8553 mtu -= chk->send_size;
8556 /* unsigned subtraction of r_mtu */
8557 if (r_mtu > chk->send_size)
8558 r_mtu -= chk->send_size;
8562 to_out += chk->send_size;
8563 if ((to_out > mx_mtu) && no_fragmentflg) {
8565 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8567 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8571 chk->window_probe = 0;
8572 data_list[bundle_at++] = chk;
8573 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8576 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8577 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8578 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8580 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8582 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8583 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8593 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8595 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8596 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8597 data_list[0]->window_probe = 1;
8598 net->window_probe = 1;
8604 * Must be sent in order of the
8605 * TSN's (on a network)
8609 } /* for (chunk gather loop for this net) */
8610 } /* if asoc.state OPEN */
8612 /* Is there something to send for this destination? */
8614 /* We may need to start a control timer or two */
8616 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8619 * do NOT clear the asconf flag as it is
8620 * used to do appropriate source address
8625 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8628 /* must start a send timer if data is being sent */
8629 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8631 * no timer running on this destination
8634 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8636 /* Now send it, if there is anything to send :> */
8637 if ((error = sctp_lowlevel_chunk_output(inp,
8640 (struct sockaddr *)&net->ro._l_addr,
8648 inp->sctp_lport, stcb->rport,
8649 htonl(stcb->asoc.peer_vtag),
8653 /* error, we could not output */
8654 if (error == ENOBUFS) {
8655 SCTP_STAT_INCR(sctps_lowlevelerr);
8656 asoc->ifp_had_enobuf = 1;
8658 if (from_where == 0) {
8659 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8661 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8663 if (*now_filled == 0) {
8664 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8666 *now = net->last_sent_time;
8668 net->last_sent_time = *now;
8672 if (error == EHOSTUNREACH) {
8674 * Destination went unreachable
8677 sctp_move_chunks_from_net(stcb, net);
8681 * I add this line to be paranoid. As far as
8682 * I can tell the continue, takes us back to
8683 * the top of the for, but just to make sure
8684 * I will reset these again here.
8686 ctl_cnt = bundle_at = 0;
8687 continue; /* This takes us back to the
8688 * for() for the nets. */
8690 asoc->ifp_had_enobuf = 0;
8695 if (bundle_at || hbflag) {
8696 /* For data/asconf and hb set time */
8697 if (*now_filled == 0) {
8698 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8700 *now = net->last_sent_time;
8702 net->last_sent_time = *now;
8706 *num_out += (ctl_cnt + bundle_at);
8709 /* setup for a RTO measurement */
8710 tsns_sent = data_list[0]->rec.data.TSN_seq;
8711 /* fill time if not already filled */
8712 if (*now_filled == 0) {
8713 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8715 *now = asoc->time_last_sent;
8717 asoc->time_last_sent = *now;
8719 if (net->rto_needed) {
8720 data_list[0]->do_rtt = 1;
8721 net->rto_needed = 0;
8723 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8724 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8730 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8731 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8734 if (old_start_at == NULL) {
8735 old_start_at = start_at;
8736 start_at = TAILQ_FIRST(&asoc->nets);
8738 goto again_one_more_time;
8741 * At the end there should be no NON timed chunks hanging on this
8744 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8745 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8747 if ((*num_out == 0) && (*reason_code == 0)) {
8752 sctp_clean_up_ctl(stcb, asoc, so_locked);
8757 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8760 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8761 * the control chunk queue.
8763 struct sctp_chunkhdr *hdr;
8764 struct sctp_tmit_chunk *chk;
8767 SCTP_TCB_LOCK_ASSERT(stcb);
8768 sctp_alloc_a_chunk(stcb, chk);
8771 sctp_m_freem(op_err);
8774 chk->copy_by_ref = 0;
8775 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT);
8776 if (op_err == NULL) {
8777 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8782 while (mat != NULL) {
8783 chk->send_size += SCTP_BUF_LEN(mat);
8784 mat = SCTP_BUF_NEXT(mat);
8786 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8787 chk->rec.chunk_id.can_take_data = 1;
8788 chk->sent = SCTP_DATAGRAM_UNSENT;
8791 chk->asoc = &stcb->asoc;
8794 hdr = mtod(op_err, struct sctp_chunkhdr *);
8795 hdr->chunk_type = SCTP_OPERATION_ERROR;
8796 hdr->chunk_flags = 0;
8797 hdr->chunk_length = htons(chk->send_size);
8798 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8801 chk->asoc->ctrl_queue_cnt++;
8805 sctp_send_cookie_echo(struct mbuf *m,
8807 struct sctp_tcb *stcb,
8808 struct sctp_nets *net)
8811 * pull out the cookie and put it at the front of the control chunk
8815 struct mbuf *cookie;
8816 struct sctp_paramhdr parm, *phdr;
8817 struct sctp_chunkhdr *hdr;
8818 struct sctp_tmit_chunk *chk;
8819 uint16_t ptype, plen;
8821 /* First find the cookie in the param area */
8823 at = offset + sizeof(struct sctp_init_chunk);
8825 SCTP_TCB_LOCK_ASSERT(stcb);
8827 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8831 ptype = ntohs(phdr->param_type);
8832 plen = ntohs(phdr->param_length);
8833 if (ptype == SCTP_STATE_COOKIE) {
8836 /* found the cookie */
8837 if ((pad = (plen % 4))) {
8840 cookie = SCTP_M_COPYM(m, at, plen, M_DONTWAIT);
8841 if (cookie == NULL) {
8845 #ifdef SCTP_MBUF_LOGGING
8846 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8849 for (mat = cookie; mat; mat = SCTP_BUF_NEXT(mat)) {
8850 if (SCTP_BUF_IS_EXTENDED(mat)) {
8851 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8858 at += SCTP_SIZE32(plen);
8860 if (cookie == NULL) {
8861 /* Did not find the cookie */
8864 /* ok, we got the cookie lets change it into a cookie echo chunk */
8866 /* first the change from param to cookie */
8867 hdr = mtod(cookie, struct sctp_chunkhdr *);
8868 hdr->chunk_type = SCTP_COOKIE_ECHO;
8869 hdr->chunk_flags = 0;
8870 /* get the chunk stuff now and place it in the FRONT of the queue */
8871 sctp_alloc_a_chunk(stcb, chk);
8874 sctp_m_freem(cookie);
8877 chk->copy_by_ref = 0;
8878 chk->send_size = plen;
8879 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8880 chk->rec.chunk_id.can_take_data = 0;
8881 chk->sent = SCTP_DATAGRAM_UNSENT;
8883 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8884 chk->asoc = &stcb->asoc;
8887 atomic_add_int(&chk->whoTo->ref_count, 1);
8888 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8889 chk->asoc->ctrl_queue_cnt++;
8894 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
8898 struct sctp_nets *net)
8901 * take a HB request and make it into a HB ack and send it.
8903 struct mbuf *outchain;
8904 struct sctp_chunkhdr *chdr;
8905 struct sctp_tmit_chunk *chk;
8909 /* must have a net pointer */
8912 outchain = SCTP_M_COPYM(m, offset, chk_length, M_DONTWAIT);
8913 if (outchain == NULL) {
8914 /* gak out of memory */
8917 #ifdef SCTP_MBUF_LOGGING
8918 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8921 for (mat = outchain; mat; mat = SCTP_BUF_NEXT(mat)) {
8922 if (SCTP_BUF_IS_EXTENDED(mat)) {
8923 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8928 chdr = mtod(outchain, struct sctp_chunkhdr *);
8929 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
8930 chdr->chunk_flags = 0;
8931 if (chk_length % 4) {
8933 uint32_t cpthis = 0;
8936 padlen = 4 - (chk_length % 4);
8937 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
8939 sctp_alloc_a_chunk(stcb, chk);
8942 sctp_m_freem(outchain);
8945 chk->copy_by_ref = 0;
8946 chk->send_size = chk_length;
8947 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
8948 chk->rec.chunk_id.can_take_data = 1;
8949 chk->sent = SCTP_DATAGRAM_UNSENT;
8952 chk->asoc = &stcb->asoc;
8953 chk->data = outchain;
8955 atomic_add_int(&chk->whoTo->ref_count, 1);
8956 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8957 chk->asoc->ctrl_queue_cnt++;
8961 sctp_send_cookie_ack(struct sctp_tcb *stcb)
8963 /* formulate and queue a cookie-ack back to sender */
8964 struct mbuf *cookie_ack;
8965 struct sctp_chunkhdr *hdr;
8966 struct sctp_tmit_chunk *chk;
8969 SCTP_TCB_LOCK_ASSERT(stcb);
8971 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
8972 if (cookie_ack == NULL) {
8976 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
8977 sctp_alloc_a_chunk(stcb, chk);
8980 sctp_m_freem(cookie_ack);
8983 chk->copy_by_ref = 0;
8984 chk->send_size = sizeof(struct sctp_chunkhdr);
8985 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
8986 chk->rec.chunk_id.can_take_data = 1;
8987 chk->sent = SCTP_DATAGRAM_UNSENT;
8990 chk->asoc = &stcb->asoc;
8991 chk->data = cookie_ack;
8992 if (chk->asoc->last_control_chunk_from != NULL) {
8993 chk->whoTo = chk->asoc->last_control_chunk_from;
8994 atomic_add_int(&chk->whoTo->ref_count, 1);
8998 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
8999 hdr->chunk_type = SCTP_COOKIE_ACK;
9000 hdr->chunk_flags = 0;
9001 hdr->chunk_length = htons(chk->send_size);
9002 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9003 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9004 chk->asoc->ctrl_queue_cnt++;
9010 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9012 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9013 struct mbuf *m_shutdown_ack;
9014 struct sctp_shutdown_ack_chunk *ack_cp;
9015 struct sctp_tmit_chunk *chk;
9017 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9018 if (m_shutdown_ack == NULL) {
9022 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9023 sctp_alloc_a_chunk(stcb, chk);
9026 sctp_m_freem(m_shutdown_ack);
9029 chk->copy_by_ref = 0;
9030 chk->send_size = sizeof(struct sctp_chunkhdr);
9031 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9032 chk->rec.chunk_id.can_take_data = 1;
9033 chk->sent = SCTP_DATAGRAM_UNSENT;
9036 chk->asoc = &stcb->asoc;
9037 chk->data = m_shutdown_ack;
9040 atomic_add_int(&chk->whoTo->ref_count, 1);
9042 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9043 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9044 ack_cp->ch.chunk_flags = 0;
9045 ack_cp->ch.chunk_length = htons(chk->send_size);
9046 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9047 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9048 chk->asoc->ctrl_queue_cnt++;
9053 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9055 /* formulate and queue a SHUTDOWN to the sender */
9056 struct mbuf *m_shutdown;
9057 struct sctp_shutdown_chunk *shutdown_cp;
9058 struct sctp_tmit_chunk *chk;
9060 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9061 if (m_shutdown == NULL) {
9065 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9066 sctp_alloc_a_chunk(stcb, chk);
9069 sctp_m_freem(m_shutdown);
9072 chk->copy_by_ref = 0;
9073 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9074 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9075 chk->rec.chunk_id.can_take_data = 1;
9076 chk->sent = SCTP_DATAGRAM_UNSENT;
9079 chk->asoc = &stcb->asoc;
9080 chk->data = m_shutdown;
9083 atomic_add_int(&chk->whoTo->ref_count, 1);
9085 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9086 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9087 shutdown_cp->ch.chunk_flags = 0;
9088 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9089 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9090 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9091 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9092 chk->asoc->ctrl_queue_cnt++;
9097 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9100 * formulate and queue an ASCONF to the peer. ASCONF parameters
9101 * should be queued on the assoc queue.
9103 struct sctp_tmit_chunk *chk;
9104 struct mbuf *m_asconf;
9107 SCTP_TCB_LOCK_ASSERT(stcb);
9109 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9110 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9111 /* can't send a new one if there is one in flight already */
9114 /* compose an ASCONF chunk, maximum length is PMTU */
9115 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9116 if (m_asconf == NULL) {
9119 sctp_alloc_a_chunk(stcb, chk);
9122 sctp_m_freem(m_asconf);
9125 chk->copy_by_ref = 0;
9126 chk->data = m_asconf;
9127 chk->send_size = len;
9128 chk->rec.chunk_id.id = SCTP_ASCONF;
9129 chk->rec.chunk_id.can_take_data = 0;
9130 chk->sent = SCTP_DATAGRAM_UNSENT;
9132 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9133 chk->asoc = &stcb->asoc;
9136 atomic_add_int(&chk->whoTo->ref_count, 1);
9138 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9139 chk->asoc->ctrl_queue_cnt++;
9144 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9147 * formulate and queue a asconf-ack back to sender. the asconf-ack
9148 * must be stored in the tcb.
9150 struct sctp_tmit_chunk *chk;
9151 struct sctp_asconf_ack *ack, *latest_ack;
9153 struct sctp_nets *net = NULL;
9155 SCTP_TCB_LOCK_ASSERT(stcb);
9156 /* Get the latest ASCONF-ACK */
9157 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9158 if (latest_ack == NULL) {
9161 if (latest_ack->last_sent_to != NULL &&
9162 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9163 /* we're doing a retransmission */
9164 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9167 if (stcb->asoc.last_control_chunk_from == NULL) {
9168 if (stcb->asoc.alternate) {
9169 net = stcb->asoc.alternate;
9171 net = stcb->asoc.primary_destination;
9174 net = stcb->asoc.last_control_chunk_from;
9179 if (stcb->asoc.last_control_chunk_from == NULL) {
9180 if (stcb->asoc.alternate) {
9181 net = stcb->asoc.alternate;
9183 net = stcb->asoc.primary_destination;
9186 net = stcb->asoc.last_control_chunk_from;
9189 latest_ack->last_sent_to = net;
9191 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9192 if (ack->data == NULL) {
9195 /* copy the asconf_ack */
9196 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_DONTWAIT);
9197 if (m_ack == NULL) {
9198 /* couldn't copy it */
9201 #ifdef SCTP_MBUF_LOGGING
9202 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9205 for (mat = m_ack; mat; mat = SCTP_BUF_NEXT(mat)) {
9206 if (SCTP_BUF_IS_EXTENDED(mat)) {
9207 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9213 sctp_alloc_a_chunk(stcb, chk);
9217 sctp_m_freem(m_ack);
9220 chk->copy_by_ref = 0;
9224 atomic_add_int(&chk->whoTo->ref_count, 1);
9229 chk->send_size = ack->len;
9230 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9231 chk->rec.chunk_id.can_take_data = 1;
9232 chk->sent = SCTP_DATAGRAM_UNSENT;
9234 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */
9235 chk->asoc = &stcb->asoc;
9237 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9238 chk->asoc->ctrl_queue_cnt++;
9245 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9246 struct sctp_tcb *stcb,
9247 struct sctp_association *asoc,
9248 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9249 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9255 * send out one MTU of retransmission. If fast_retransmit is
9256 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9257 * rwnd. For a Cookie or Asconf in the control chunk queue we
9258 * retransmit them by themselves.
9260 * For data chunks we will pick out the lowest TSN's in the sent_queue
9261 * marked for resend and bundle them all together (up to a MTU of
9262 * destination). The address to send to should have been
9263 * selected/changed where the retransmission was marked (i.e. in FR
9264 * or t3-timeout routines).
9266 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9267 struct sctp_tmit_chunk *chk, *fwd;
9268 struct mbuf *m, *endofchain;
9269 struct sctp_nets *net = NULL;
9270 uint32_t tsns_sent = 0;
9271 int no_fragmentflg, bundle_at, cnt_thru;
9273 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9274 struct sctp_auth_chunk *auth = NULL;
9275 uint32_t auth_offset = 0;
9276 uint16_t auth_keyid;
9277 int override_ok = 1;
9278 int data_auth_reqd = 0;
9281 SCTP_TCB_LOCK_ASSERT(stcb);
9282 tmr_started = ctl_cnt = bundle_at = error = 0;
9287 endofchain = m = NULL;
9288 auth_keyid = stcb->asoc.authinfo.active_keyid;
9289 #ifdef SCTP_AUDITING_ENABLED
9290 sctp_audit_log(0xC3, 1);
9292 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9293 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9294 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9295 asoc->sent_queue_retran_cnt);
9296 asoc->sent_queue_cnt = 0;
9297 asoc->sent_queue_cnt_removeable = 0;
9298 /* send back 0/0 so we enter normal transmission */
9302 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9303 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9304 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9305 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9306 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9309 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9310 if (chk != asoc->str_reset) {
9312 * not eligible for retran if its
9319 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9323 * Add an AUTH chunk, if chunk requires it save the
9324 * offset into the chain for AUTH
9326 if ((auth == NULL) &&
9327 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9328 stcb->asoc.peer_auth_chunks))) {
9329 m = sctp_add_auth_chunk(m, &endofchain,
9330 &auth, &auth_offset,
9332 chk->rec.chunk_id.id);
9333 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9335 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9341 /* do we have control chunks to retransmit? */
9343 /* Start a timer no matter if we suceed or fail */
9344 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9345 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9346 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9347 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9348 chk->snd_count++; /* update our count */
9349 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9350 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9351 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9352 no_fragmentflg, 0, 0,
9353 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9354 chk->whoTo->port, NULL,
9357 SCTP_STAT_INCR(sctps_lowlevelerr);
9364 * We don't want to mark the net->sent time here since this
9365 * we use this for HB and retrans cannot measure RTT
9367 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9369 chk->sent = SCTP_DATAGRAM_SENT;
9370 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9374 /* Clean up the fwd-tsn list */
9375 sctp_clean_up_ctl(stcb, asoc, so_locked);
9380 * Ok, it is just data retransmission we need to do or that and a
9381 * fwd-tsn with it all.
9383 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9384 return (SCTP_RETRAN_DONE);
9386 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9387 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9388 /* not yet open, resend the cookie and that is it */
9391 #ifdef SCTP_AUDITING_ENABLED
9392 sctp_auditing(20, inp, stcb, NULL);
9394 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9395 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9396 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9397 /* No, not sent to this net or not ready for rtx */
9400 if (chk->data == NULL) {
9401 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9402 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9405 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9406 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9407 /* Gak, we have exceeded max unlucky retran, abort! */
9408 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9410 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9411 atomic_add_int(&stcb->asoc.refcnt, 1);
9412 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked);
9413 SCTP_TCB_LOCK(stcb);
9414 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9415 return (SCTP_RETRAN_EXIT);
9417 /* pick up the net */
9419 switch (net->ro._l_addr.sa.sa_family) {
9422 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9427 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9436 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9437 /* No room in peers rwnd */
9440 tsn = asoc->last_acked_seq + 1;
9441 if (tsn == chk->rec.data.TSN_seq) {
9443 * we make a special exception for this
9444 * case. The peer has no rwnd but is missing
9445 * the lowest chunk.. which is probably what
9446 * is holding up the rwnd.
9448 goto one_chunk_around;
9453 if (asoc->peers_rwnd < mtu) {
9455 if ((asoc->peers_rwnd == 0) &&
9456 (asoc->total_flight == 0)) {
9457 chk->window_probe = 1;
9458 chk->whoTo->window_probe = 1;
9461 #ifdef SCTP_AUDITING_ENABLED
9462 sctp_audit_log(0xC3, 2);
9466 net->fast_retran_ip = 0;
9467 if (chk->rec.data.doing_fast_retransmit == 0) {
9469 * if no FR in progress skip destination that have
9470 * flight_size > cwnd.
9472 if (net->flight_size >= net->cwnd) {
9477 * Mark the destination net to have FR recovery
9481 net->fast_retran_ip = 1;
9485 * if no AUTH is yet included and this chunk requires it,
9486 * make sure to account for it. We don't apply the size
9487 * until the AUTH chunk is actually added below in case
9488 * there is no room for this chunk.
9490 if (data_auth_reqd && (auth == NULL)) {
9491 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9495 if ((chk->send_size <= (mtu - dmtu)) ||
9496 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9497 /* ok we will add this one */
9498 if (data_auth_reqd) {
9500 m = sctp_add_auth_chunk(m,
9506 auth_keyid = chk->auth_keyid;
9508 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9509 } else if (override_ok) {
9510 auth_keyid = chk->auth_keyid;
9512 } else if (chk->auth_keyid != auth_keyid) {
9513 /* different keyid, so done bundling */
9517 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9519 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9522 /* Do clear IP_DF ? */
9523 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9526 /* upate our MTU size */
9527 if (mtu > (chk->send_size + dmtu))
9528 mtu -= (chk->send_size + dmtu);
9531 data_list[bundle_at++] = chk;
9532 if (one_chunk && (asoc->total_flight <= 0)) {
9533 SCTP_STAT_INCR(sctps_windowprobed);
9536 if (one_chunk == 0) {
9538 * now are there anymore forward from chk to pick
9541 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9542 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9543 /* Nope, not for retran */
9546 if (fwd->whoTo != net) {
9547 /* Nope, not the net in question */
9550 if (data_auth_reqd && (auth == NULL)) {
9551 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9554 if (fwd->send_size <= (mtu - dmtu)) {
9555 if (data_auth_reqd) {
9557 m = sctp_add_auth_chunk(m,
9563 auth_keyid = fwd->auth_keyid;
9565 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9566 } else if (override_ok) {
9567 auth_keyid = fwd->auth_keyid;
9569 } else if (fwd->auth_keyid != auth_keyid) {
9577 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9579 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9582 /* Do clear IP_DF ? */
9583 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9586 /* upate our MTU size */
9587 if (mtu > (fwd->send_size + dmtu))
9588 mtu -= (fwd->send_size + dmtu);
9591 data_list[bundle_at++] = fwd;
9592 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9596 /* can't fit so we are done */
9601 /* Is there something to send for this destination? */
9604 * No matter if we fail/or suceed we should start a
9605 * timer. A failure is like a lost IP packet :-)
9607 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9609 * no timer running on this destination
9612 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9615 /* Now lets send it, if there is anything to send :> */
9616 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9617 (struct sockaddr *)&net->ro._l_addr, m,
9618 auth_offset, auth, auth_keyid,
9619 no_fragmentflg, 0, 0,
9620 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9624 /* error, we could not output */
9625 SCTP_STAT_INCR(sctps_lowlevelerr);
9633 * We don't want to mark the net->sent time here
9634 * since this we use this for HB and retrans cannot
9637 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9639 /* For auto-close */
9641 if (*now_filled == 0) {
9642 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9643 *now = asoc->time_last_sent;
9646 asoc->time_last_sent = *now;
9648 *cnt_out += bundle_at;
9649 #ifdef SCTP_AUDITING_ENABLED
9650 sctp_audit_log(0xC4, bundle_at);
9653 tsns_sent = data_list[0]->rec.data.TSN_seq;
9655 for (i = 0; i < bundle_at; i++) {
9656 SCTP_STAT_INCR(sctps_sendretransdata);
9657 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9659 * When we have a revoked data, and we
9660 * retransmit it, then we clear the revoked
9661 * flag since this flag dictates if we
9662 * subtracted from the fs
9664 if (data_list[i]->rec.data.chunk_was_revoked) {
9665 /* Deflate the cwnd */
9666 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9667 data_list[i]->rec.data.chunk_was_revoked = 0;
9669 data_list[i]->snd_count++;
9670 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9671 /* record the time */
9672 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9673 if (data_list[i]->book_size_scale) {
9675 * need to double the book size on
9678 data_list[i]->book_size_scale = 0;
9680 * Since we double the booksize, we
9681 * must also double the output queue
9682 * size, since this get shrunk when
9683 * we free by this amount.
9685 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9686 data_list[i]->book_size *= 2;
9690 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9691 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9692 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9694 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9695 (uint32_t) (data_list[i]->send_size +
9696 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9698 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9699 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9700 data_list[i]->whoTo->flight_size,
9701 data_list[i]->book_size,
9702 (uintptr_t) data_list[i]->whoTo,
9703 data_list[i]->rec.data.TSN_seq);
9705 sctp_flight_size_increase(data_list[i]);
9706 sctp_total_flight_increase(stcb, data_list[i]);
9707 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9708 /* SWS sender side engages */
9709 asoc->peers_rwnd = 0;
9712 (data_list[i]->rec.data.doing_fast_retransmit)) {
9713 SCTP_STAT_INCR(sctps_sendfastretrans);
9714 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9715 (tmr_started == 0)) {
9717 * ok we just fast-retrans'd
9718 * the lowest TSN, i.e the
9719 * first on the list. In
9720 * this case we want to give
9721 * some more time to get a
9722 * SACK back without a
9725 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9726 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
9727 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9731 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9732 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9734 #ifdef SCTP_AUDITING_ENABLED
9735 sctp_auditing(21, inp, stcb, NULL);
9741 if (asoc->sent_queue_retran_cnt <= 0) {
9742 /* all done we have no more to retran */
9743 asoc->sent_queue_retran_cnt = 0;
9747 /* No more room in rwnd */
9750 /* stop the for loop here. we sent out a packet */
9757 sctp_timer_validation(struct sctp_inpcb *inp,
9758 struct sctp_tcb *stcb,
9759 struct sctp_association *asoc)
9761 struct sctp_nets *net;
9763 /* Validate that a timer is running somewhere */
9764 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9765 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9766 /* Here is a timer */
9770 SCTP_TCB_LOCK_ASSERT(stcb);
9771 /* Gak, we did not have a timer somewhere */
9772 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9773 if (asoc->alternate) {
9774 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9776 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9782 sctp_chunk_output(struct sctp_inpcb *inp,
9783 struct sctp_tcb *stcb,
9786 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9792 * Ok this is the generic chunk service queue. we must do the
9794 * - See if there are retransmits pending, if so we must
9796 * - Service the stream queue that is next, moving any
9797 * message (note I must get a complete message i.e.
9798 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9800 * - Check to see if the cwnd/rwnd allows any output, if so we
9801 * go ahead and fomulate and send the low level chunks. Making sure
9802 * to combine any control in the control chunk queue also.
9804 struct sctp_association *asoc;
9805 struct sctp_nets *net;
9806 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0;
9807 unsigned int burst_cnt = 0;
9811 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9814 unsigned int tot_frs = 0;
9817 /* The Nagle algorithm is only applied when handling a send call. */
9818 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9819 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9827 SCTP_TCB_LOCK_ASSERT(stcb);
9829 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9831 if ((un_sent <= 0) &&
9832 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9833 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9834 (asoc->sent_queue_retran_cnt == 0)) {
9835 /* Nothing to do unless there is something to be sent left */
9839 * Do we have something to send, data or control AND a sack timer
9840 * running, if so piggy-back the sack.
9842 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9843 sctp_send_sack(stcb, so_locked);
9844 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9846 while (asoc->sent_queue_retran_cnt) {
9848 * Ok, it is retransmission time only, we send out only ONE
9849 * packet with a single call off to the retran code.
9851 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9853 * Special hook for handling cookiess discarded
9854 * by peer that carried data. Send cookie-ack only
9855 * and then the next call with get the retran's.
9857 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9859 &now, &now_filled, frag_point, so_locked);
9861 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9862 /* if its not from a HB then do it */
9864 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9870 * its from any other place, we don't allow retran
9871 * output (only control)
9876 /* Can't send anymore */
9878 * now lets push out control by calling med-level
9879 * output once. this assures that we WILL send HB's
9882 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9884 &now, &now_filled, frag_point, so_locked);
9885 #ifdef SCTP_AUDITING_ENABLED
9886 sctp_auditing(8, inp, stcb, NULL);
9888 sctp_timer_validation(inp, stcb, asoc);
9893 * The count was off.. retran is not happening so do
9894 * the normal retransmission.
9896 #ifdef SCTP_AUDITING_ENABLED
9897 sctp_auditing(9, inp, stcb, NULL);
9899 if (ret == SCTP_RETRAN_EXIT) {
9904 if (from_where == SCTP_OUTPUT_FROM_T3) {
9905 /* Only one transmission allowed out of a timeout */
9906 #ifdef SCTP_AUDITING_ENABLED
9907 sctp_auditing(10, inp, stcb, NULL);
9909 /* Push out any control */
9910 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
9911 &now, &now_filled, frag_point, so_locked);
9914 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
9915 /* Hit FR burst limit */
9918 if ((num_out == 0) && (ret == 0)) {
9919 /* No more retrans to send */
9923 #ifdef SCTP_AUDITING_ENABLED
9924 sctp_auditing(12, inp, stcb, NULL);
9926 /* Check for bad destinations, if they exist move chunks around. */
9927 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9928 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
9930 * if possible move things off of this address we
9931 * still may send below due to the dormant state but
9932 * we try to find an alternate address to send to
9933 * and if we have one we move all queued data on the
9934 * out wheel to this alternate address.
9936 if (net->ref_count > 1)
9937 sctp_move_chunks_from_net(stcb, net);
9940 * if ((asoc->sat_network) || (net->addr_is_local))
9941 * { burst_limit = asoc->max_burst *
9942 * SCTP_SAT_NETWORK_BURST_INCR; }
9944 if (asoc->max_burst > 0) {
9945 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
9946 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
9948 * JRS - Use the congestion
9949 * control given in the
9950 * congestion control module
9952 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
9953 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
9954 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
9956 SCTP_STAT_INCR(sctps_maxburstqueued);
9958 net->fast_retran_ip = 0;
9960 if (net->flight_size == 0) {
9962 * Should be decaying the
9974 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
9975 &reason_code, 0, from_where,
9976 &now, &now_filled, frag_point, so_locked);
9978 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
9979 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
9980 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
9982 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9983 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
9984 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
9988 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
9992 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9993 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
9995 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10000 * When the Nagle algorithm is used, look at how
10001 * much is unsent, then if its smaller than an MTU
10002 * and we have data in flight we stop, except if we
10003 * are handling a fragmented user message.
10005 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10006 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10007 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10008 (stcb->asoc.total_flight > 0) &&
10009 ((stcb->asoc.locked_on_sending == NULL) ||
10010 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10014 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10015 TAILQ_EMPTY(&asoc->send_queue) &&
10016 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10017 /* Nothing left to send */
10020 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10021 /* Nothing left to send */
10024 } while (num_out &&
10025 ((asoc->max_burst == 0) ||
10026 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10027 (burst_cnt < asoc->max_burst)));
10029 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10030 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10031 SCTP_STAT_INCR(sctps_maxburstqueued);
10032 asoc->burst_limit_applied = 1;
10033 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10034 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10037 asoc->burst_limit_applied = 0;
10040 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10041 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10043 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10047 * Now we need to clean up the control chunk chain if a ECNE is on
10048 * it. It must be marked as UNSENT again so next call will continue
10049 * to send it until such time that we get a CWR, to remove it.
10051 if (stcb->asoc.ecn_echo_cnt_onq)
10052 sctp_fix_ecn_echo(asoc);
10059 struct sctp_inpcb *inp,
10061 struct sockaddr *addr,
10062 struct mbuf *control,
10067 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10070 if (inp->sctp_socket == NULL) {
10071 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10074 return (sctp_sosend(inp->sctp_socket,
10076 (struct uio *)NULL,
10084 send_forward_tsn(struct sctp_tcb *stcb,
10085 struct sctp_association *asoc)
10087 struct sctp_tmit_chunk *chk;
10088 struct sctp_forward_tsn_chunk *fwdtsn;
10089 uint32_t advance_peer_ack_point;
10091 SCTP_TCB_LOCK_ASSERT(stcb);
10092 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10093 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10094 /* mark it to unsent */
10095 chk->sent = SCTP_DATAGRAM_UNSENT;
10096 chk->snd_count = 0;
10097 /* Do we correct its output location? */
10099 sctp_free_remote_addr(chk->whoTo);
10102 goto sctp_fill_in_rest;
10105 /* Ok if we reach here we must build one */
10106 sctp_alloc_a_chunk(stcb, chk);
10110 asoc->fwd_tsn_cnt++;
10111 chk->copy_by_ref = 0;
10112 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10113 chk->rec.chunk_id.can_take_data = 0;
10116 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
10117 if (chk->data == NULL) {
10118 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10121 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10122 chk->sent = SCTP_DATAGRAM_UNSENT;
10123 chk->snd_count = 0;
10124 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10125 asoc->ctrl_queue_cnt++;
10128 * Here we go through and fill out the part that deals with
10129 * stream/seq of the ones we skip.
10131 SCTP_BUF_LEN(chk->data) = 0;
10133 struct sctp_tmit_chunk *at, *tp1, *last;
10134 struct sctp_strseq *strseq;
10135 unsigned int cnt_of_space, i, ovh;
10136 unsigned int space_needed;
10137 unsigned int cnt_of_skipped = 0;
10139 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10140 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10141 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10142 /* no more to look at */
10145 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10146 /* We don't report these */
10151 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10152 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10154 cnt_of_space = M_TRAILINGSPACE(chk->data);
10156 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10157 ovh = SCTP_MIN_OVERHEAD;
10159 ovh = SCTP_MIN_V4_OVERHEAD;
10161 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10162 /* trim to a mtu size */
10163 cnt_of_space = asoc->smallest_mtu - ovh;
10165 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10166 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10167 0xff, 0, cnt_of_skipped,
10168 asoc->advanced_peer_ack_point);
10171 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10172 if (cnt_of_space < space_needed) {
10174 * ok we must trim down the chunk by lowering the
10175 * advance peer ack point.
10177 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10178 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10179 0xff, 0xff, cnt_of_space,
10182 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10183 cnt_of_skipped /= sizeof(struct sctp_strseq);
10185 * Go through and find the TSN that will be the one
10188 at = TAILQ_FIRST(&asoc->sent_queue);
10190 for (i = 0; i < cnt_of_skipped; i++) {
10191 tp1 = TAILQ_NEXT(at, sctp_next);
10198 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10199 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10200 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10201 asoc->advanced_peer_ack_point);
10205 * last now points to last one I can report, update
10209 advance_peer_ack_point = last->rec.data.TSN_seq;
10210 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10211 cnt_of_skipped * sizeof(struct sctp_strseq);
10213 chk->send_size = space_needed;
10214 /* Setup the chunk */
10215 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10216 fwdtsn->ch.chunk_length = htons(chk->send_size);
10217 fwdtsn->ch.chunk_flags = 0;
10218 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10219 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10220 SCTP_BUF_LEN(chk->data) = chk->send_size;
10223 * Move pointer to after the fwdtsn and transfer to the
10226 strseq = (struct sctp_strseq *)fwdtsn;
10228 * Now populate the strseq list. This is done blindly
10229 * without pulling out duplicate stream info. This is
10230 * inefficent but won't harm the process since the peer will
10231 * look at these in sequence and will thus release anything.
10232 * It could mean we exceed the PMTU and chop off some that
10233 * we could have included.. but this is unlikely (aka 1432/4
10234 * would mean 300+ stream seq's would have to be reported in
10235 * one FWD-TSN. With a bit of work we can later FIX this to
10236 * optimize and pull out duplcates.. but it does add more
10237 * overhead. So for now... not!
10239 at = TAILQ_FIRST(&asoc->sent_queue);
10240 for (i = 0; i < cnt_of_skipped; i++) {
10241 tp1 = TAILQ_NEXT(at, sctp_next);
10244 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10245 /* We don't report these */
10250 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10251 at->rec.data.fwd_tsn_cnt = 0;
10253 strseq->stream = ntohs(at->rec.data.stream_number);
10254 strseq->sequence = ntohs(at->rec.data.stream_seq);
10263 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10264 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10270 * Queue up a SACK or NR-SACK in the control queue.
10271 * We must first check to see if a SACK or NR-SACK is
10272 * somehow on the control queue.
10273 * If so, we will take and and remove the old one.
10275 struct sctp_association *asoc;
10276 struct sctp_tmit_chunk *chk, *a_chk;
10277 struct sctp_sack_chunk *sack;
10278 struct sctp_nr_sack_chunk *nr_sack;
10279 struct sctp_gap_ack_block *gap_descriptor;
10280 struct sack_track *selector;
10285 int limit_reached = 0;
10286 unsigned int i, siz, j;
10287 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10290 uint32_t highest_tsn;
10295 if ((stcb->asoc.sctp_nr_sack_on_off == 1) &&
10296 (stcb->asoc.peer_supports_nr_sack == 1)) {
10297 type = SCTP_NR_SELECTIVE_ACK;
10299 type = SCTP_SELECTIVE_ACK;
10302 asoc = &stcb->asoc;
10303 SCTP_TCB_LOCK_ASSERT(stcb);
10304 if (asoc->last_data_chunk_from == NULL) {
10305 /* Hmm we never received anything */
10308 sctp_slide_mapping_arrays(stcb);
10309 sctp_set_rwnd(stcb, asoc);
10310 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10311 if (chk->rec.chunk_id.id == type) {
10312 /* Hmm, found a sack already on queue, remove it */
10313 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10314 asoc->ctrl_queue_cnt--;
10317 sctp_m_freem(a_chk->data);
10318 a_chk->data = NULL;
10320 if (a_chk->whoTo) {
10321 sctp_free_remote_addr(a_chk->whoTo);
10322 a_chk->whoTo = NULL;
10327 if (a_chk == NULL) {
10328 sctp_alloc_a_chunk(stcb, a_chk);
10329 if (a_chk == NULL) {
10330 /* No memory so we drop the idea, and set a timer */
10331 if (stcb->asoc.delayed_ack) {
10332 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10333 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10334 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10335 stcb->sctp_ep, stcb, NULL);
10337 stcb->asoc.send_sack = 1;
10341 a_chk->copy_by_ref = 0;
10342 a_chk->rec.chunk_id.id = type;
10343 a_chk->rec.chunk_id.can_take_data = 1;
10345 /* Clear our pkt counts */
10346 asoc->data_pkts_seen = 0;
10348 a_chk->asoc = asoc;
10349 a_chk->snd_count = 0;
10350 a_chk->send_size = 0; /* fill in later */
10351 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10352 a_chk->whoTo = NULL;
10354 if ((asoc->numduptsns) ||
10355 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) {
10357 * Ok, we have some duplicates or the destination for the
10358 * sack is unreachable, lets see if we can select an
10359 * alternate than asoc->last_data_chunk_from
10361 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) &&
10362 (asoc->used_alt_onsack > asoc->numnets)) {
10363 /* We used an alt last time, don't this time */
10364 a_chk->whoTo = NULL;
10366 asoc->used_alt_onsack++;
10367 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10369 if (a_chk->whoTo == NULL) {
10370 /* Nope, no alternate */
10371 a_chk->whoTo = asoc->last_data_chunk_from;
10372 asoc->used_alt_onsack = 0;
10376 * No duplicates so we use the last place we received data
10379 asoc->used_alt_onsack = 0;
10380 a_chk->whoTo = asoc->last_data_chunk_from;
10382 if (a_chk->whoTo) {
10383 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10385 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10386 highest_tsn = asoc->highest_tsn_inside_map;
10388 highest_tsn = asoc->highest_tsn_inside_nr_map;
10390 if (highest_tsn == asoc->cumulative_tsn) {
10392 if (type == SCTP_SELECTIVE_ACK) {
10393 space_req = sizeof(struct sctp_sack_chunk);
10395 space_req = sizeof(struct sctp_nr_sack_chunk);
10398 /* gaps get a cluster */
10399 space_req = MCLBYTES;
10401 /* Ok now lets formulate a MBUF with our sack */
10402 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_DONTWAIT, 1, MT_DATA);
10403 if ((a_chk->data == NULL) ||
10404 (a_chk->whoTo == NULL)) {
10405 /* rats, no mbuf memory */
10407 /* was a problem with the destination */
10408 sctp_m_freem(a_chk->data);
10409 a_chk->data = NULL;
10411 sctp_free_a_chunk(stcb, a_chk, so_locked);
10412 /* sa_ignore NO_NULL_CHK */
10413 if (stcb->asoc.delayed_ack) {
10414 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10415 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
10416 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10417 stcb->sctp_ep, stcb, NULL);
10419 stcb->asoc.send_sack = 1;
10423 /* ok, lets go through and fill it in */
10424 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10425 space = M_TRAILINGSPACE(a_chk->data);
10426 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10427 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10429 limit = mtod(a_chk->data, caddr_t);
10434 if ((asoc->sctp_cmt_on_off > 0) &&
10435 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10437 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10438 * received, then set high bit to 1, else 0. Reset
10441 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10442 asoc->cmt_dac_pkts_rcvd = 0;
10444 #ifdef SCTP_ASOCLOG_OF_TSNS
10445 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10446 stcb->asoc.cumack_log_atsnt++;
10447 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10448 stcb->asoc.cumack_log_atsnt = 0;
10451 /* reset the readers interpretation */
10452 stcb->freed_by_sorcv_sincelast = 0;
10454 if (type == SCTP_SELECTIVE_ACK) {
10455 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10457 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10458 if (highest_tsn > asoc->mapping_array_base_tsn) {
10459 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10461 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10465 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10466 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10467 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10468 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10470 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10474 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10477 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10479 if (((type == SCTP_SELECTIVE_ACK) &&
10480 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10481 ((type == SCTP_NR_SELECTIVE_ACK) &&
10482 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10483 /* we have a gap .. maybe */
10484 for (i = 0; i < siz; i++) {
10485 tsn_map = asoc->mapping_array[i];
10486 if (type == SCTP_SELECTIVE_ACK) {
10487 tsn_map |= asoc->nr_mapping_array[i];
10491 * Clear all bits corresponding to TSNs
10492 * smaller or equal to the cumulative TSN.
10494 tsn_map &= (~0 << (1 - offset));
10496 selector = &sack_array[tsn_map];
10497 if (mergeable && selector->right_edge) {
10499 * Backup, left and right edges were ok to
10505 if (selector->num_entries == 0)
10508 for (j = 0; j < selector->num_entries; j++) {
10509 if (mergeable && selector->right_edge) {
10511 * do a merge by NOT setting
10517 * no merge, set the left
10521 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10523 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10526 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10532 if (selector->left_edge) {
10536 if (limit_reached) {
10537 /* Reached the limit stop */
10543 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10544 (limit_reached == 0)) {
10548 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10549 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10551 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10554 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10557 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10559 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10560 /* we have a gap .. maybe */
10561 for (i = 0; i < siz; i++) {
10562 tsn_map = asoc->nr_mapping_array[i];
10565 * Clear all bits corresponding to
10566 * TSNs smaller or equal to the
10569 tsn_map &= (~0 << (1 - offset));
10571 selector = &sack_array[tsn_map];
10572 if (mergeable && selector->right_edge) {
10574 * Backup, left and right edges were
10577 num_nr_gap_blocks--;
10580 if (selector->num_entries == 0)
10583 for (j = 0; j < selector->num_entries; j++) {
10584 if (mergeable && selector->right_edge) {
10586 * do a merge by NOT
10593 * no merge, set the
10597 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10599 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10600 num_nr_gap_blocks++;
10602 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10608 if (selector->left_edge) {
10612 if (limit_reached) {
10613 /* Reached the limit stop */
10620 /* now we must add any dups we are going to report. */
10621 if ((limit_reached == 0) && (asoc->numduptsns)) {
10622 dup = (uint32_t *) gap_descriptor;
10623 for (i = 0; i < asoc->numduptsns; i++) {
10624 *dup = htonl(asoc->dup_tsns[i]);
10627 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10632 asoc->numduptsns = 0;
10635 * now that the chunk is prepared queue it to the control chunk
10638 if (type == SCTP_SELECTIVE_ACK) {
10639 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10640 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10641 num_dups * sizeof(int32_t);
10642 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10643 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10644 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10645 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10646 sack->sack.num_dup_tsns = htons(num_dups);
10647 sack->ch.chunk_type = type;
10648 sack->ch.chunk_flags = flags;
10649 sack->ch.chunk_length = htons(a_chk->send_size);
10651 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10652 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10653 num_dups * sizeof(int32_t);
10654 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10655 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10656 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10657 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10658 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10659 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10660 nr_sack->nr_sack.reserved = 0;
10661 nr_sack->ch.chunk_type = type;
10662 nr_sack->ch.chunk_flags = flags;
10663 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10665 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10666 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10667 asoc->ctrl_queue_cnt++;
10668 asoc->send_sack = 0;
10669 SCTP_STAT_INCR(sctps_sendsacks);
10674 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10675 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10680 struct mbuf *m_abort, *m, *m_last;
10681 struct mbuf *m_out, *m_end = NULL;
10682 struct sctp_abort_chunk *abort;
10683 struct sctp_auth_chunk *auth = NULL;
10684 struct sctp_nets *net;
10686 uint32_t auth_offset = 0;
10687 uint16_t cause_len, chunk_len, padding_len;
10689 SCTP_TCB_LOCK_ASSERT(stcb);
10691 * Add an AUTH chunk, if chunk requires it and save the offset into
10692 * the chain for AUTH
10694 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10695 stcb->asoc.peer_auth_chunks)) {
10696 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10697 stcb, SCTP_ABORT_ASSOCIATION);
10698 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10702 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
10703 if (m_abort == NULL) {
10705 sctp_m_freem(m_out);
10708 sctp_m_freem(operr);
10712 /* link in any error */
10713 SCTP_BUF_NEXT(m_abort) = operr;
10716 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10717 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10718 if (SCTP_BUF_NEXT(m) == NULL) {
10722 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10723 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10724 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10725 if (m_out == NULL) {
10726 /* NO Auth chunk prepended, so reserve space in front */
10727 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10730 /* Put AUTH chunk at the front of the chain */
10731 SCTP_BUF_NEXT(m_end) = m_abort;
10733 if (stcb->asoc.alternate) {
10734 net = stcb->asoc.alternate;
10736 net = stcb->asoc.primary_destination;
10738 /* Fill in the ABORT chunk header. */
10739 abort = mtod(m_abort, struct sctp_abort_chunk *);
10740 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10741 if (stcb->asoc.peer_vtag == 0) {
10742 /* This happens iff the assoc is in COOKIE-WAIT state. */
10743 vtag = stcb->asoc.my_vtag;
10744 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10746 vtag = stcb->asoc.peer_vtag;
10747 abort->ch.chunk_flags = 0;
10749 abort->ch.chunk_length = htons(chunk_len);
10750 /* Add padding, if necessary. */
10751 if (padding_len > 0) {
10752 if ((m_last == NULL) || sctp_add_pad_tombuf(m_last, padding_len)) {
10753 sctp_m_freem(m_out);
10757 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10758 (struct sockaddr *)&net->ro._l_addr,
10759 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10760 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10761 stcb->asoc.primary_destination->port, NULL,
10764 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10768 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10769 struct sctp_nets *net,
10772 /* formulate and SEND a SHUTDOWN-COMPLETE */
10773 struct mbuf *m_shutdown_comp;
10774 struct sctp_shutdown_complete_chunk *shutdown_complete;
10778 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
10779 if (m_shutdown_comp == NULL) {
10783 if (reflect_vtag) {
10784 flags = SCTP_HAD_NO_TCB;
10785 vtag = stcb->asoc.my_vtag;
10788 vtag = stcb->asoc.peer_vtag;
10790 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10791 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10792 shutdown_complete->ch.chunk_flags = flags;
10793 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10794 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10795 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10796 (struct sockaddr *)&net->ro._l_addr,
10797 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10798 stcb->sctp_ep->sctp_lport, stcb->rport,
10802 SCTP_SO_NOT_LOCKED);
10803 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10808 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10809 struct sctphdr *sh, uint32_t vtag,
10810 uint8_t type, struct mbuf *cause,
10811 uint8_t use_mflowid, uint32_t mflowid,
10812 uint32_t vrf_id, uint16_t port)
10814 struct mbuf *o_pak;
10816 struct sctphdr *shout;
10817 struct sctp_chunkhdr *ch;
10818 struct udphdr *udp;
10819 int len, cause_len, padding_len, ret;
10822 struct sockaddr_in *src_sin, *dst_sin;
10827 struct sockaddr_in6 *src_sin6, *dst_sin6;
10828 struct ip6_hdr *ip6;
10832 /* Compute the length of the cause and add final padding. */
10834 if (cause != NULL) {
10835 struct mbuf *m_at, *m_last = NULL;
10837 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10838 if (SCTP_BUF_NEXT(m_at) == NULL)
10840 cause_len += SCTP_BUF_LEN(m_at);
10842 padding_len = cause_len % 4;
10843 if (padding_len != 0) {
10844 padding_len = 4 - padding_len;
10846 if (padding_len != 0) {
10847 if (sctp_add_pad_tombuf(m_last, padding_len)) {
10848 sctp_m_freem(cause);
10855 /* Get an mbuf for the header. */
10856 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
10857 switch (dst->sa_family) {
10860 len += sizeof(struct ip);
10865 len += sizeof(struct ip6_hdr);
10872 len += sizeof(struct udphdr);
10874 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
10875 if (mout == NULL) {
10877 sctp_m_freem(cause);
10881 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10882 SCTP_BUF_LEN(mout) = len;
10883 SCTP_BUF_NEXT(mout) = cause;
10884 if (use_mflowid != 0) {
10885 mout->m_pkthdr.flowid = mflowid;
10886 mout->m_flags |= M_FLOWID;
10894 switch (dst->sa_family) {
10897 src_sin = (struct sockaddr_in *)src;
10898 dst_sin = (struct sockaddr_in *)dst;
10899 ip = mtod(mout, struct ip *);
10900 ip->ip_v = IPVERSION;
10901 ip->ip_hl = (sizeof(struct ip) >> 2);
10903 ip->ip_id = ip_newid();
10905 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
10907 ip->ip_p = IPPROTO_UDP;
10909 ip->ip_p = IPPROTO_SCTP;
10911 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
10912 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
10914 len = sizeof(struct ip);
10915 shout = (struct sctphdr *)((caddr_t)ip + len);
10920 src_sin6 = (struct sockaddr_in6 *)src;
10921 dst_sin6 = (struct sockaddr_in6 *)dst;
10922 ip6 = mtod(mout, struct ip6_hdr *);
10923 ip6->ip6_flow = htonl(0x60000000);
10924 if (V_ip6_auto_flowlabel) {
10925 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
10927 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
10929 ip6->ip6_nxt = IPPROTO_UDP;
10931 ip6->ip6_nxt = IPPROTO_SCTP;
10933 ip6->ip6_src = dst_sin6->sin6_addr;
10934 ip6->ip6_dst = src_sin6->sin6_addr;
10935 len = sizeof(struct ip6_hdr);
10936 shout = (struct sctphdr *)((caddr_t)ip6 + len);
10941 shout = mtod(mout, struct sctphdr *);
10945 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
10946 sctp_m_freem(mout);
10949 udp = (struct udphdr *)shout;
10950 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
10951 udp->uh_dport = port;
10953 udp->uh_ulen = htons(sizeof(struct udphdr) +
10954 sizeof(struct sctphdr) +
10955 sizeof(struct sctp_chunkhdr) +
10956 cause_len + padding_len);
10957 len += sizeof(struct udphdr);
10958 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
10962 shout->src_port = sh->dest_port;
10963 shout->dest_port = sh->src_port;
10964 shout->checksum = 0;
10966 shout->v_tag = htonl(vtag);
10968 shout->v_tag = sh->v_tag;
10970 len += sizeof(struct sctphdr);
10971 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
10972 ch->chunk_type = type;
10974 ch->chunk_flags = 0;
10976 ch->chunk_flags = SCTP_HAD_NO_TCB;
10978 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
10979 len += sizeof(struct sctp_chunkhdr);
10980 len += cause_len + padding_len;
10982 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
10983 sctp_m_freem(mout);
10986 SCTP_ATTACH_CHAIN(o_pak, mout, len);
10987 switch (dst->sa_family) {
10992 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
10999 #if defined(SCTP_WITH_NO_CSUM)
11000 SCTP_STAT_INCR(sctps_sendnocrc);
11002 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11003 SCTP_STAT_INCR(sctps_sendswcrc);
11006 SCTP_ENABLE_UDP_CSUM(o_pak);
11009 #if defined(SCTP_WITH_NO_CSUM)
11010 SCTP_STAT_INCR(sctps_sendnocrc);
11012 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11013 mout->m_pkthdr.csum_data = 0;
11014 SCTP_STAT_INCR(sctps_sendhwcrc);
11017 #ifdef SCTP_PACKET_LOGGING
11018 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11019 sctp_packet_log(o_pak);
11022 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11027 ip6->ip6_plen = len - sizeof(struct ip6_hdr);
11029 #if defined(SCTP_WITH_NO_CSUM)
11030 SCTP_STAT_INCR(sctps_sendnocrc);
11032 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11033 SCTP_STAT_INCR(sctps_sendswcrc);
11035 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11036 udp->uh_sum = 0xffff;
11039 #if defined(SCTP_WITH_NO_CSUM)
11040 SCTP_STAT_INCR(sctps_sendnocrc);
11042 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr));
11043 SCTP_STAT_INCR(sctps_sendswcrc);
11046 #ifdef SCTP_PACKET_LOGGING
11047 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11048 sctp_packet_log(o_pak);
11051 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11055 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11057 sctp_m_freem(mout);
11058 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11061 SCTP_STAT_INCR(sctps_sendpackets);
11062 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11063 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11068 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11069 struct sctphdr *sh,
11070 uint8_t use_mflowid, uint32_t mflowid,
11071 uint32_t vrf_id, uint16_t port)
11073 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11074 use_mflowid, mflowid,
11079 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11080 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11085 struct sctp_tmit_chunk *chk;
11086 struct sctp_heartbeat_chunk *hb;
11087 struct timeval now;
11089 SCTP_TCB_LOCK_ASSERT(stcb);
11093 (void)SCTP_GETTIME_TIMEVAL(&now);
11094 switch (net->ro._l_addr.sa.sa_family) {
11106 sctp_alloc_a_chunk(stcb, chk);
11108 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11111 chk->copy_by_ref = 0;
11112 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11113 chk->rec.chunk_id.can_take_data = 1;
11114 chk->asoc = &stcb->asoc;
11115 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11117 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11118 if (chk->data == NULL) {
11119 sctp_free_a_chunk(stcb, chk, so_locked);
11122 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11123 SCTP_BUF_LEN(chk->data) = chk->send_size;
11124 chk->sent = SCTP_DATAGRAM_UNSENT;
11125 chk->snd_count = 0;
11127 atomic_add_int(&chk->whoTo->ref_count, 1);
11128 /* Now we have a mbuf that we can fill in with the details */
11129 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11130 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11131 /* fill out chunk header */
11132 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11133 hb->ch.chunk_flags = 0;
11134 hb->ch.chunk_length = htons(chk->send_size);
11135 /* Fill out hb parameter */
11136 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11137 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11138 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11139 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11140 /* Did our user request this one, put it in */
11141 hb->heartbeat.hb_info.addr_family = net->ro._l_addr.sa.sa_family;
11142 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11143 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11145 * we only take from the entropy pool if the address is not
11148 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11149 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11151 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11152 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11154 switch (net->ro._l_addr.sa.sa_family) {
11157 memcpy(hb->heartbeat.hb_info.address,
11158 &net->ro._l_addr.sin.sin_addr,
11159 sizeof(net->ro._l_addr.sin.sin_addr));
11164 memcpy(hb->heartbeat.hb_info.address,
11165 &net->ro._l_addr.sin6.sin6_addr,
11166 sizeof(net->ro._l_addr.sin6.sin6_addr));
11173 net->hb_responded = 0;
11174 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11175 stcb->asoc.ctrl_queue_cnt++;
11176 SCTP_STAT_INCR(sctps_sendheartbeat);
11181 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11184 struct sctp_association *asoc;
11185 struct sctp_ecne_chunk *ecne;
11186 struct sctp_tmit_chunk *chk;
11191 asoc = &stcb->asoc;
11192 SCTP_TCB_LOCK_ASSERT(stcb);
11193 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11194 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11195 /* found a previous ECN_ECHO update it if needed */
11196 uint32_t cnt, ctsn;
11198 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11199 ctsn = ntohl(ecne->tsn);
11200 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11201 ecne->tsn = htonl(high_tsn);
11202 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11204 cnt = ntohl(ecne->num_pkts_since_cwr);
11206 ecne->num_pkts_since_cwr = htonl(cnt);
11210 /* nope could not find one to update so we must build one */
11211 sctp_alloc_a_chunk(stcb, chk);
11215 chk->copy_by_ref = 0;
11216 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11217 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11218 chk->rec.chunk_id.can_take_data = 0;
11219 chk->asoc = &stcb->asoc;
11220 chk->send_size = sizeof(struct sctp_ecne_chunk);
11221 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11222 if (chk->data == NULL) {
11223 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11226 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11227 SCTP_BUF_LEN(chk->data) = chk->send_size;
11228 chk->sent = SCTP_DATAGRAM_UNSENT;
11229 chk->snd_count = 0;
11231 atomic_add_int(&chk->whoTo->ref_count, 1);
11233 stcb->asoc.ecn_echo_cnt_onq++;
11234 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11235 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11236 ecne->ch.chunk_flags = 0;
11237 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11238 ecne->tsn = htonl(high_tsn);
11239 ecne->num_pkts_since_cwr = htonl(1);
11240 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11241 asoc->ctrl_queue_cnt++;
11245 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11246 struct mbuf *m, int len, int iphlen, int bad_crc)
11248 struct sctp_association *asoc;
11249 struct sctp_pktdrop_chunk *drp;
11250 struct sctp_tmit_chunk *chk;
11256 struct sctp_chunkhdr *ch, chunk_buf;
11257 unsigned int chk_length;
11262 asoc = &stcb->asoc;
11263 SCTP_TCB_LOCK_ASSERT(stcb);
11264 if (asoc->peer_supports_pktdrop == 0) {
11266 * peer must declare support before I send one.
11270 if (stcb->sctp_socket == NULL) {
11273 sctp_alloc_a_chunk(stcb, chk);
11277 chk->copy_by_ref = 0;
11279 chk->send_size = len;
11280 /* Validate that we do not have an ABORT in here. */
11281 offset = iphlen + sizeof(struct sctphdr);
11282 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11283 sizeof(*ch), (uint8_t *) & chunk_buf);
11284 while (ch != NULL) {
11285 chk_length = ntohs(ch->chunk_length);
11286 if (chk_length < sizeof(*ch)) {
11287 /* break to abort land */
11290 switch (ch->chunk_type) {
11291 case SCTP_PACKET_DROPPED:
11292 case SCTP_ABORT_ASSOCIATION:
11293 case SCTP_INITIATION_ACK:
11295 * We don't respond with an PKT-DROP to an ABORT
11296 * or PKT-DROP. We also do not respond to an
11297 * INIT-ACK, because we can't know if the initiation
11298 * tag is correct or not.
11300 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11305 offset += SCTP_SIZE32(chk_length);
11306 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11307 sizeof(*ch), (uint8_t *) & chunk_buf);
11310 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11311 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11313 * only send 1 mtu worth, trim off the excess on the end.
11316 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11319 chk->asoc = &stcb->asoc;
11320 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11321 if (chk->data == NULL) {
11323 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11326 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11327 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11329 sctp_m_freem(chk->data);
11333 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11334 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11335 chk->book_size_scale = 0;
11337 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11338 drp->trunc_len = htons(fullsz);
11340 * Len is already adjusted to size minus overhead above take
11341 * out the pkt_drop chunk itself from it.
11343 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11344 len = chk->send_size;
11346 /* no truncation needed */
11347 drp->ch.chunk_flags = 0;
11348 drp->trunc_len = htons(0);
11351 drp->ch.chunk_flags |= SCTP_BADCRC;
11353 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11354 SCTP_BUF_LEN(chk->data) = chk->send_size;
11355 chk->sent = SCTP_DATAGRAM_UNSENT;
11356 chk->snd_count = 0;
11358 /* we should hit here */
11360 atomic_add_int(&chk->whoTo->ref_count, 1);
11364 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11365 chk->rec.chunk_id.can_take_data = 1;
11366 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11367 drp->ch.chunk_length = htons(chk->send_size);
11368 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11372 drp->bottle_bw = htonl(spc);
11373 if (asoc->my_rwnd) {
11374 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11375 asoc->size_on_all_streams +
11376 asoc->my_rwnd_control_len +
11377 stcb->sctp_socket->so_rcv.sb_cc);
11380 * If my rwnd is 0, possibly from mbuf depletion as well as
11381 * space used, tell the peer there is NO space aka onq == bw
11383 drp->current_onq = htonl(spc);
11387 m_copydata(m, iphlen, len, (caddr_t)datap);
11388 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11389 asoc->ctrl_queue_cnt++;
11393 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11395 struct sctp_association *asoc;
11396 struct sctp_cwr_chunk *cwr;
11397 struct sctp_tmit_chunk *chk;
11399 SCTP_TCB_LOCK_ASSERT(stcb);
11403 asoc = &stcb->asoc;
11404 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11405 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11407 * found a previous CWR queued to same destination
11408 * update it if needed
11412 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11413 ctsn = ntohl(cwr->tsn);
11414 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11415 cwr->tsn = htonl(high_tsn);
11417 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11418 /* Make sure override is carried */
11419 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11424 sctp_alloc_a_chunk(stcb, chk);
11428 chk->copy_by_ref = 0;
11429 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11430 chk->rec.chunk_id.can_take_data = 1;
11431 chk->asoc = &stcb->asoc;
11432 chk->send_size = sizeof(struct sctp_cwr_chunk);
11433 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11434 if (chk->data == NULL) {
11435 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11438 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11439 SCTP_BUF_LEN(chk->data) = chk->send_size;
11440 chk->sent = SCTP_DATAGRAM_UNSENT;
11441 chk->snd_count = 0;
11443 atomic_add_int(&chk->whoTo->ref_count, 1);
11444 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11445 cwr->ch.chunk_type = SCTP_ECN_CWR;
11446 cwr->ch.chunk_flags = override;
11447 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11448 cwr->tsn = htonl(high_tsn);
11449 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11450 asoc->ctrl_queue_cnt++;
11454 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11455 int number_entries, uint16_t * list,
11456 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11458 uint16_t len, old_len, i;
11459 struct sctp_stream_reset_out_request *req_out;
11460 struct sctp_chunkhdr *ch;
11462 ch = mtod(chk->data, struct sctp_chunkhdr *);
11463 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11465 /* get to new offset for the param. */
11466 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11467 /* now how long will this param be? */
11468 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11469 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11470 req_out->ph.param_length = htons(len);
11471 req_out->request_seq = htonl(seq);
11472 req_out->response_seq = htonl(resp_seq);
11473 req_out->send_reset_at_tsn = htonl(last_sent);
11474 if (number_entries) {
11475 for (i = 0; i < number_entries; i++) {
11476 req_out->list_of_streams[i] = htons(list[i]);
11479 if (SCTP_SIZE32(len) > len) {
11481 * Need to worry about the pad we may end up adding to the
11482 * end. This is easy since the struct is either aligned to 4
11483 * bytes or 2 bytes off.
11485 req_out->list_of_streams[number_entries] = 0;
11487 /* now fix the chunk length */
11488 ch->chunk_length = htons(len + old_len);
11489 chk->book_size = len + old_len;
11490 chk->book_size_scale = 0;
11491 chk->send_size = SCTP_SIZE32(chk->book_size);
11492 SCTP_BUF_LEN(chk->data) = chk->send_size;
11497 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11498 int number_entries, uint16_t * list,
11501 uint16_t len, old_len, i;
11502 struct sctp_stream_reset_in_request *req_in;
11503 struct sctp_chunkhdr *ch;
11505 ch = mtod(chk->data, struct sctp_chunkhdr *);
11506 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11508 /* get to new offset for the param. */
11509 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11510 /* now how long will this param be? */
11511 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11512 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11513 req_in->ph.param_length = htons(len);
11514 req_in->request_seq = htonl(seq);
11515 if (number_entries) {
11516 for (i = 0; i < number_entries; i++) {
11517 req_in->list_of_streams[i] = htons(list[i]);
11520 if (SCTP_SIZE32(len) > len) {
11522 * Need to worry about the pad we may end up adding to the
11523 * end. This is easy since the struct is either aligned to 4
11524 * bytes or 2 bytes off.
11526 req_in->list_of_streams[number_entries] = 0;
11528 /* now fix the chunk length */
11529 ch->chunk_length = htons(len + old_len);
11530 chk->book_size = len + old_len;
11531 chk->book_size_scale = 0;
11532 chk->send_size = SCTP_SIZE32(chk->book_size);
11533 SCTP_BUF_LEN(chk->data) = chk->send_size;
11538 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11541 uint16_t len, old_len;
11542 struct sctp_stream_reset_tsn_request *req_tsn;
11543 struct sctp_chunkhdr *ch;
11545 ch = mtod(chk->data, struct sctp_chunkhdr *);
11546 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11548 /* get to new offset for the param. */
11549 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11550 /* now how long will this param be? */
11551 len = sizeof(struct sctp_stream_reset_tsn_request);
11552 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11553 req_tsn->ph.param_length = htons(len);
11554 req_tsn->request_seq = htonl(seq);
11556 /* now fix the chunk length */
11557 ch->chunk_length = htons(len + old_len);
11558 chk->send_size = len + old_len;
11559 chk->book_size = SCTP_SIZE32(chk->send_size);
11560 chk->book_size_scale = 0;
11561 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11566 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11567 uint32_t resp_seq, uint32_t result)
11569 uint16_t len, old_len;
11570 struct sctp_stream_reset_response *resp;
11571 struct sctp_chunkhdr *ch;
11573 ch = mtod(chk->data, struct sctp_chunkhdr *);
11574 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11576 /* get to new offset for the param. */
11577 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11578 /* now how long will this param be? */
11579 len = sizeof(struct sctp_stream_reset_response);
11580 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11581 resp->ph.param_length = htons(len);
11582 resp->response_seq = htonl(resp_seq);
11583 resp->result = ntohl(result);
11585 /* now fix the chunk length */
11586 ch->chunk_length = htons(len + old_len);
11587 chk->book_size = len + old_len;
11588 chk->book_size_scale = 0;
11589 chk->send_size = SCTP_SIZE32(chk->book_size);
11590 SCTP_BUF_LEN(chk->data) = chk->send_size;
11595 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11596 uint32_t resp_seq, uint32_t result,
11597 uint32_t send_una, uint32_t recv_next)
11599 uint16_t len, old_len;
11600 struct sctp_stream_reset_response_tsn *resp;
11601 struct sctp_chunkhdr *ch;
11603 ch = mtod(chk->data, struct sctp_chunkhdr *);
11604 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11606 /* get to new offset for the param. */
11607 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11608 /* now how long will this param be? */
11609 len = sizeof(struct sctp_stream_reset_response_tsn);
11610 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11611 resp->ph.param_length = htons(len);
11612 resp->response_seq = htonl(resp_seq);
11613 resp->result = htonl(result);
11614 resp->senders_next_tsn = htonl(send_una);
11615 resp->receivers_next_tsn = htonl(recv_next);
11617 /* now fix the chunk length */
11618 ch->chunk_length = htons(len + old_len);
11619 chk->book_size = len + old_len;
11620 chk->send_size = SCTP_SIZE32(chk->book_size);
11621 chk->book_size_scale = 0;
11622 SCTP_BUF_LEN(chk->data) = chk->send_size;
11627 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11631 uint16_t len, old_len;
11632 struct sctp_chunkhdr *ch;
11633 struct sctp_stream_reset_add_strm *addstr;
11635 ch = mtod(chk->data, struct sctp_chunkhdr *);
11636 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11638 /* get to new offset for the param. */
11639 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11640 /* now how long will this param be? */
11641 len = sizeof(struct sctp_stream_reset_add_strm);
11644 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11645 addstr->ph.param_length = htons(len);
11646 addstr->request_seq = htonl(seq);
11647 addstr->number_of_streams = htons(adding);
11648 addstr->reserved = 0;
11650 /* now fix the chunk length */
11651 ch->chunk_length = htons(len + old_len);
11652 chk->send_size = len + old_len;
11653 chk->book_size = SCTP_SIZE32(chk->send_size);
11654 chk->book_size_scale = 0;
11655 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11660 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11664 uint16_t len, old_len;
11665 struct sctp_chunkhdr *ch;
11666 struct sctp_stream_reset_add_strm *addstr;
11668 ch = mtod(chk->data, struct sctp_chunkhdr *);
11669 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11671 /* get to new offset for the param. */
11672 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11673 /* now how long will this param be? */
11674 len = sizeof(struct sctp_stream_reset_add_strm);
11676 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11677 addstr->ph.param_length = htons(len);
11678 addstr->request_seq = htonl(seq);
11679 addstr->number_of_streams = htons(adding);
11680 addstr->reserved = 0;
11682 /* now fix the chunk length */
11683 ch->chunk_length = htons(len + old_len);
11684 chk->send_size = len + old_len;
11685 chk->book_size = SCTP_SIZE32(chk->send_size);
11686 chk->book_size_scale = 0;
11687 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11692 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11693 int number_entries, uint16_t * list,
11694 uint8_t send_out_req,
11695 uint8_t send_in_req,
11696 uint8_t send_tsn_req,
11697 uint8_t add_stream,
11699 uint16_t adding_i, uint8_t peer_asked)
11702 struct sctp_association *asoc;
11703 struct sctp_tmit_chunk *chk;
11704 struct sctp_chunkhdr *ch;
11707 asoc = &stcb->asoc;
11708 if (asoc->stream_reset_outstanding) {
11710 * Already one pending, must get ACK back to clear the flag.
11712 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11715 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11716 (add_stream == 0)) {
11717 /* nothing to do */
11718 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11721 if (send_tsn_req && (send_out_req || send_in_req)) {
11722 /* error, can't do that */
11723 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11726 sctp_alloc_a_chunk(stcb, chk);
11728 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11731 chk->copy_by_ref = 0;
11732 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11733 chk->rec.chunk_id.can_take_data = 0;
11734 chk->asoc = &stcb->asoc;
11735 chk->book_size = sizeof(struct sctp_chunkhdr);
11736 chk->send_size = SCTP_SIZE32(chk->book_size);
11737 chk->book_size_scale = 0;
11739 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11740 if (chk->data == NULL) {
11741 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11742 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11745 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11747 /* setup chunk parameters */
11748 chk->sent = SCTP_DATAGRAM_UNSENT;
11749 chk->snd_count = 0;
11750 if (stcb->asoc.alternate) {
11751 chk->whoTo = stcb->asoc.alternate;
11753 chk->whoTo = stcb->asoc.primary_destination;
11755 atomic_add_int(&chk->whoTo->ref_count, 1);
11756 ch = mtod(chk->data, struct sctp_chunkhdr *);
11757 ch->chunk_type = SCTP_STREAM_RESET;
11758 ch->chunk_flags = 0;
11759 ch->chunk_length = htons(chk->book_size);
11760 SCTP_BUF_LEN(chk->data) = chk->send_size;
11762 seq = stcb->asoc.str_reset_seq_out;
11763 if (send_out_req) {
11764 sctp_add_stream_reset_out(chk, number_entries, list,
11765 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
11766 asoc->stream_reset_out_is_outstanding = 1;
11768 asoc->stream_reset_outstanding++;
11770 if ((add_stream & 1) &&
11771 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
11772 /* Need to allocate more */
11773 struct sctp_stream_out *oldstream;
11774 struct sctp_stream_queue_pending *sp, *nsp;
11777 oldstream = stcb->asoc.strmout;
11778 /* get some more */
11779 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
11780 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)),
11782 if (stcb->asoc.strmout == NULL) {
11785 stcb->asoc.strmout = oldstream;
11786 /* Turn off the bit */
11787 x = add_stream & 0xfe;
11792 * Ok now we proceed with copying the old out stuff and
11793 * initializing the new stuff.
11795 SCTP_TCB_SEND_LOCK(stcb);
11796 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
11797 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11798 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11799 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
11800 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
11801 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
11802 stcb->asoc.strmout[i].stream_no = i;
11803 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
11804 /* now anything on those queues? */
11805 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
11806 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
11807 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
11809 /* Now move assoc pointers too */
11810 if (stcb->asoc.last_out_stream == &oldstream[i]) {
11811 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
11813 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
11814 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
11817 /* now the new streams */
11818 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
11819 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
11820 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11821 stcb->asoc.strmout[i].chunks_on_queues = 0;
11822 stcb->asoc.strmout[i].next_sequence_send = 0x0;
11823 stcb->asoc.strmout[i].stream_no = i;
11824 stcb->asoc.strmout[i].last_msg_incomplete = 0;
11825 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
11827 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
11828 SCTP_FREE(oldstream, SCTP_M_STRMO);
11829 SCTP_TCB_SEND_UNLOCK(stcb);
11832 if ((add_stream & 1) && (adding_o > 0)) {
11833 asoc->strm_pending_add_size = adding_o;
11834 asoc->peer_req_out = peer_asked;
11835 sctp_add_an_out_stream(chk, seq, adding_o);
11837 asoc->stream_reset_outstanding++;
11839 if ((add_stream & 2) && (adding_i > 0)) {
11840 sctp_add_an_in_stream(chk, seq, adding_i);
11842 asoc->stream_reset_outstanding++;
11845 sctp_add_stream_reset_in(chk, number_entries, list, seq);
11847 asoc->stream_reset_outstanding++;
11849 if (send_tsn_req) {
11850 sctp_add_stream_reset_tsn(chk, seq);
11851 asoc->stream_reset_outstanding++;
11853 asoc->str_reset = chk;
11854 /* insert the chunk for sending */
11855 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11858 asoc->ctrl_queue_cnt++;
11859 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11864 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
11865 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
11866 uint8_t use_mflowid, uint32_t mflowid,
11867 uint32_t vrf_id, uint16_t port)
11869 /* Don't respond to an ABORT with an ABORT. */
11870 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
11872 sctp_m_freem(cause);
11875 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
11876 use_mflowid, mflowid,
11882 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
11883 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
11884 uint8_t use_mflowid, uint32_t mflowid,
11885 uint32_t vrf_id, uint16_t port)
11887 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
11888 use_mflowid, mflowid,
11893 static struct mbuf *
11894 sctp_copy_resume(struct uio *uio,
11896 int user_marks_eor,
11899 struct mbuf **new_tail)
11903 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
11904 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
11906 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11909 *sndout = m_length(m, NULL);
11910 *new_tail = m_last(m);
11916 sctp_copy_one(struct sctp_stream_queue_pending *sp,
11923 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
11925 if (sp->data == NULL) {
11926 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11929 sp->tail_mbuf = m_last(sp->data);
11935 static struct sctp_stream_queue_pending *
11936 sctp_copy_it_in(struct sctp_tcb *stcb,
11937 struct sctp_association *asoc,
11938 struct sctp_sndrcvinfo *srcv,
11940 struct sctp_nets *net,
11942 int user_marks_eor,
11946 * This routine must be very careful in its work. Protocol
11947 * processing is up and running so care must be taken to spl...()
11948 * when you need to do something that may effect the stcb/asoc. The
11949 * sb is locked however. When data is copied the protocol processing
11950 * should be enabled since this is a slower operation...
11952 struct sctp_stream_queue_pending *sp = NULL;
11956 /* Now can we send this? */
11957 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
11958 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
11959 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
11960 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
11961 /* got data while shutting down */
11962 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
11963 *error = ECONNRESET;
11966 sctp_alloc_a_strmoq(stcb, sp);
11968 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11973 sp->sender_all_done = 0;
11974 sp->sinfo_flags = srcv->sinfo_flags;
11975 sp->timetolive = srcv->sinfo_timetolive;
11976 sp->ppid = srcv->sinfo_ppid;
11977 sp->context = srcv->sinfo_context;
11978 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
11980 sp->stream = srcv->sinfo_stream;
11981 sp->length = min(uio->uio_resid, max_send_len);
11982 if ((sp->length == (uint32_t) uio->uio_resid) &&
11983 ((user_marks_eor == 0) ||
11984 (srcv->sinfo_flags & SCTP_EOF) ||
11985 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
11986 sp->msg_is_complete = 1;
11988 sp->msg_is_complete = 0;
11990 sp->sender_all_done = 0;
11991 sp->some_taken = 0;
11992 sp->put_last_out = 0;
11993 resv_in_first = sizeof(struct sctp_data_chunk);
11994 sp->data = sp->tail_mbuf = NULL;
11995 if (sp->length == 0) {
11999 if (srcv->sinfo_keynumber_valid) {
12000 sp->auth_keyid = srcv->sinfo_keynumber;
12002 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12004 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12005 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12006 sp->holds_key_ref = 1;
12008 *error = sctp_copy_one(sp, uio, resv_in_first);
12011 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12014 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12016 atomic_add_int(&sp->net->ref_count, 1);
12020 sctp_set_prsctp_policy(sp);
12028 sctp_sosend(struct socket *so,
12029 struct sockaddr *addr,
12032 struct mbuf *control,
12037 int error, use_sndinfo = 0;
12038 struct sctp_sndrcvinfo sndrcvninfo;
12039 struct sockaddr *addr_to_use;
12041 #if defined(INET) && defined(INET6)
12042 struct sockaddr_in sin;
12047 /* process cmsg snd/rcv info (maybe a assoc-id) */
12048 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12049 sizeof(sndrcvninfo))) {
12054 addr_to_use = addr;
12055 #if defined(INET) && defined(INET6)
12056 if ((addr) && (addr->sa_family == AF_INET6)) {
12057 struct sockaddr_in6 *sin6;
12059 sin6 = (struct sockaddr_in6 *)addr;
12060 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12061 in6_sin6_2_sin(&sin, sin6);
12062 addr_to_use = (struct sockaddr *)&sin;
12066 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12069 use_sndinfo ? &sndrcvninfo : NULL
12077 sctp_lower_sosend(struct socket *so,
12078 struct sockaddr *addr,
12080 struct mbuf *i_pak,
12081 struct mbuf *control,
12083 struct sctp_sndrcvinfo *srcv
12088 unsigned int sndlen = 0, max_len;
12090 struct mbuf *top = NULL;
12091 int queue_only = 0, queue_only_for_init = 0;
12092 int free_cnt_applied = 0;
12094 int now_filled = 0;
12095 unsigned int inqueue_bytes = 0;
12096 struct sctp_block_entry be;
12097 struct sctp_inpcb *inp;
12098 struct sctp_tcb *stcb = NULL;
12099 struct timeval now;
12100 struct sctp_nets *net;
12101 struct sctp_association *asoc;
12102 struct sctp_inpcb *t_inp;
12103 int user_marks_eor;
12104 int create_lock_applied = 0;
12105 int nagle_applies = 0;
12106 int some_on_control = 0;
12107 int got_all_of_the_send = 0;
12108 int hold_tcblock = 0;
12109 int non_blocking = 0;
12110 uint32_t local_add_more, local_soresv = 0;
12112 uint16_t sinfo_flags;
12113 sctp_assoc_t sinfo_assoc_id;
12120 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12122 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12125 SCTP_RELEASE_PKT(i_pak);
12129 if ((uio == NULL) && (i_pak == NULL)) {
12130 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12133 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12134 atomic_add_int(&inp->total_sends, 1);
12136 if (uio->uio_resid < 0) {
12137 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12140 sndlen = uio->uio_resid;
12142 top = SCTP_HEADER_TO_CHAIN(i_pak);
12143 sndlen = SCTP_HEADER_LEN(i_pak);
12145 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12148 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12149 (inp->sctp_socket->so_qlimit)) {
12150 /* The listener can NOT send */
12151 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12156 * Pre-screen address, if one is given the sin-len
12157 * must be set correctly!
12160 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12162 switch (raddr->sa.sa_family) {
12165 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12166 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12170 port = raddr->sin.sin_port;
12175 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12176 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12180 port = raddr->sin6.sin6_port;
12184 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12185 error = EAFNOSUPPORT;
12192 sinfo_flags = srcv->sinfo_flags;
12193 sinfo_assoc_id = srcv->sinfo_assoc_id;
12194 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12195 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12196 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12200 if (srcv->sinfo_flags)
12201 SCTP_STAT_INCR(sctps_sends_with_flags);
12203 sinfo_flags = inp->def_send.sinfo_flags;
12204 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12206 if (sinfo_flags & SCTP_SENDALL) {
12207 /* its a sendall */
12208 error = sctp_sendall(inp, uio, top, srcv);
12212 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12213 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12217 /* now we must find the assoc */
12218 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12219 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12220 SCTP_INP_RLOCK(inp);
12221 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12223 SCTP_TCB_LOCK(stcb);
12226 SCTP_INP_RUNLOCK(inp);
12227 } else if (sinfo_assoc_id) {
12228 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12231 * Since we did not use findep we must
12232 * increment it, and if we don't find a tcb
12235 SCTP_INP_WLOCK(inp);
12236 SCTP_INP_INCR_REF(inp);
12237 SCTP_INP_WUNLOCK(inp);
12238 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12239 if (stcb == NULL) {
12240 SCTP_INP_WLOCK(inp);
12241 SCTP_INP_DECR_REF(inp);
12242 SCTP_INP_WUNLOCK(inp);
12247 if ((stcb == NULL) && (addr)) {
12248 /* Possible implicit send? */
12249 SCTP_ASOC_CREATE_LOCK(inp);
12250 create_lock_applied = 1;
12251 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12252 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12253 /* Should I really unlock ? */
12254 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12259 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12260 (addr->sa_family == AF_INET6)) {
12261 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12265 SCTP_INP_WLOCK(inp);
12266 SCTP_INP_INCR_REF(inp);
12267 SCTP_INP_WUNLOCK(inp);
12268 /* With the lock applied look again */
12269 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12270 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12271 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12273 if (stcb == NULL) {
12274 SCTP_INP_WLOCK(inp);
12275 SCTP_INP_DECR_REF(inp);
12276 SCTP_INP_WUNLOCK(inp);
12283 if (t_inp != inp) {
12284 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12289 if (stcb == NULL) {
12290 if (addr == NULL) {
12291 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12295 /* We must go ahead and start the INIT process */
12298 if ((sinfo_flags & SCTP_ABORT) ||
12299 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12301 * User asks to abort a non-existant assoc,
12302 * or EOF a non-existant assoc with no data
12304 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12308 /* get an asoc/stcb struct */
12309 vrf_id = inp->def_vrf_id;
12311 if (create_lock_applied == 0) {
12312 panic("Error, should hold create lock and I don't?");
12315 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12318 if (stcb == NULL) {
12319 /* Error is setup for us in the call */
12322 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12323 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12325 * Set the connected flag so we can queue
12328 soisconnecting(so);
12331 if (create_lock_applied) {
12332 SCTP_ASOC_CREATE_UNLOCK(inp);
12333 create_lock_applied = 0;
12335 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12338 * Turn on queue only flag to prevent data from
12342 asoc = &stcb->asoc;
12343 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12344 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12346 /* initialize authentication params for the assoc */
12347 sctp_initialize_auth_params(inp, stcb);
12350 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12351 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7);
12357 /* out with the INIT */
12358 queue_only_for_init = 1;
12360 * we may want to dig in after this call and adjust the MTU
12361 * value. It defaulted to 1500 (constant) but the ro
12362 * structure may now have an update and thus we may need to
12363 * change it BEFORE we append the message.
12367 asoc = &stcb->asoc;
12369 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12370 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12372 net = sctp_findnet(stcb, addr);
12375 if ((net == NULL) ||
12376 ((port != 0) && (port != stcb->rport))) {
12377 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12382 if (stcb->asoc.alternate) {
12383 net = stcb->asoc.alternate;
12385 net = stcb->asoc.primary_destination;
12388 atomic_add_int(&stcb->total_sends, 1);
12389 /* Keep the stcb from being freed under our feet */
12390 atomic_add_int(&asoc->refcnt, 1);
12391 free_cnt_applied = 1;
12393 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12394 if (sndlen > asoc->smallest_mtu) {
12395 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12400 if (SCTP_SO_IS_NBIO(so)
12401 || (flags & MSG_NBIO)
12405 /* would we block? */
12406 if (non_blocking) {
12407 if (hold_tcblock == 0) {
12408 SCTP_TCB_LOCK(stcb);
12411 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12412 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12413 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12414 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12415 if (sndlen > SCTP_SB_LIMIT_SND(so))
12418 error = EWOULDBLOCK;
12421 stcb->asoc.sb_send_resv += sndlen;
12422 SCTP_TCB_UNLOCK(stcb);
12425 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12427 local_soresv = sndlen;
12428 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12429 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12430 error = ECONNRESET;
12433 if (create_lock_applied) {
12434 SCTP_ASOC_CREATE_UNLOCK(inp);
12435 create_lock_applied = 0;
12437 if (asoc->stream_reset_outstanding) {
12439 * Can't queue any data while stream reset is underway.
12441 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
12445 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12446 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12449 /* we are now done with all control */
12451 sctp_m_freem(control);
12454 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12455 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12456 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12457 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12458 if (srcv->sinfo_flags & SCTP_ABORT) {
12461 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12462 error = ECONNRESET;
12466 /* Ok, we will attempt a msgsnd :> */
12468 p->td_ru.ru_msgsnd++;
12470 /* Are we aborting? */
12471 if (srcv->sinfo_flags & SCTP_ABORT) {
12473 int tot_demand, tot_out = 0, max_out;
12475 SCTP_STAT_INCR(sctps_sends_with_abort);
12476 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12477 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12478 /* It has to be up before we abort */
12479 /* how big is the user initiated abort? */
12480 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12484 if (hold_tcblock) {
12485 SCTP_TCB_UNLOCK(stcb);
12489 struct mbuf *cntm = NULL;
12491 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAIT, 1, MT_DATA);
12493 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12494 tot_out += SCTP_BUF_LEN(cntm);
12498 /* Must fit in a MTU */
12500 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12501 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12503 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12507 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAIT, 1, MT_DATA);
12510 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12514 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12515 max_out -= sizeof(struct sctp_abort_msg);
12516 if (tot_out > max_out) {
12520 struct sctp_paramhdr *ph;
12522 /* now move forward the data pointer */
12523 ph = mtod(mm, struct sctp_paramhdr *);
12524 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12525 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
12527 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12529 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12532 * Here if we can't get his data we
12533 * still abort we just don't get to
12534 * send the users note :-0
12541 SCTP_BUF_NEXT(mm) = top;
12545 if (hold_tcblock == 0) {
12546 SCTP_TCB_LOCK(stcb);
12548 atomic_add_int(&stcb->asoc.refcnt, -1);
12549 free_cnt_applied = 0;
12550 /* release this lock, otherwise we hang on ourselves */
12551 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12552 /* now relock the stcb so everything is sane */
12556 * In this case top is already chained to mm avoid double
12557 * free, since we free it below if top != NULL and driver
12558 * would free it after sending the packet out
12565 /* Calculate the maximum we can send */
12566 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12567 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12568 if (non_blocking) {
12569 /* we already checked for non-blocking above. */
12572 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12577 if (hold_tcblock) {
12578 SCTP_TCB_UNLOCK(stcb);
12581 /* Is the stream no. valid? */
12582 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12583 /* Invalid stream number */
12584 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12588 if (asoc->strmout == NULL) {
12589 /* huh? software error */
12590 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12594 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12595 if ((user_marks_eor == 0) &&
12596 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12597 /* It will NEVER fit */
12598 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12602 if ((uio == NULL) && user_marks_eor) {
12604 * We do not support eeor mode for
12605 * sending with mbuf chains (like sendfile).
12607 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12611 if (user_marks_eor) {
12612 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12615 * For non-eeor the whole message must fit in
12616 * the socket send buffer.
12618 local_add_more = sndlen;
12621 if (non_blocking) {
12622 goto skip_preblock;
12624 if (((max_len <= local_add_more) &&
12625 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12627 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12628 /* No room right now ! */
12629 SOCKBUF_LOCK(&so->so_snd);
12630 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12631 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12632 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12633 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12634 (unsigned int)SCTP_SB_LIMIT_SND(so),
12637 stcb->asoc.stream_queue_cnt,
12638 stcb->asoc.chunks_on_out_queue,
12639 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12640 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12641 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
12644 stcb->block_entry = &be;
12645 error = sbwait(&so->so_snd);
12646 stcb->block_entry = NULL;
12647 if (error || so->so_error || be.error) {
12650 error = so->so_error;
12655 SOCKBUF_UNLOCK(&so->so_snd);
12658 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12659 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12660 asoc, stcb->asoc.total_output_queue_size);
12662 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12665 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12667 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12668 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12672 SOCKBUF_UNLOCK(&so->so_snd);
12675 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12679 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
12680 * case NOTE: uio will be null when top/mbuf is passed
12683 if (srcv->sinfo_flags & SCTP_EOF) {
12684 got_all_of_the_send = 1;
12687 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12693 struct sctp_stream_queue_pending *sp;
12694 struct sctp_stream_out *strm;
12697 SCTP_TCB_SEND_LOCK(stcb);
12698 if ((asoc->stream_locked) &&
12699 (asoc->stream_locked_on != srcv->sinfo_stream)) {
12700 SCTP_TCB_SEND_UNLOCK(stcb);
12701 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12705 SCTP_TCB_SEND_UNLOCK(stcb);
12707 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
12708 if (strm->last_msg_incomplete == 0) {
12710 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
12711 if ((sp == NULL) || (error)) {
12714 SCTP_TCB_SEND_LOCK(stcb);
12715 if (sp->msg_is_complete) {
12716 strm->last_msg_incomplete = 0;
12717 asoc->stream_locked = 0;
12720 * Just got locked to this guy in case of an
12723 strm->last_msg_incomplete = 1;
12724 asoc->stream_locked = 1;
12725 asoc->stream_locked_on = srcv->sinfo_stream;
12726 sp->sender_all_done = 0;
12728 sctp_snd_sb_alloc(stcb, sp->length);
12729 atomic_add_int(&asoc->stream_queue_cnt, 1);
12730 if (srcv->sinfo_flags & SCTP_UNORDERED) {
12731 SCTP_STAT_INCR(sctps_sends_with_unord);
12733 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
12734 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
12735 SCTP_TCB_SEND_UNLOCK(stcb);
12737 SCTP_TCB_SEND_LOCK(stcb);
12738 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
12739 SCTP_TCB_SEND_UNLOCK(stcb);
12741 /* ???? Huh ??? last msg is gone */
12743 panic("Warning: Last msg marked incomplete, yet nothing left?");
12745 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
12746 strm->last_msg_incomplete = 0;
12752 while (uio->uio_resid > 0) {
12753 /* How much room do we have? */
12754 struct mbuf *new_tail, *mm;
12756 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12757 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
12761 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
12762 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
12763 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
12766 if (hold_tcblock) {
12767 SCTP_TCB_UNLOCK(stcb);
12770 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
12771 if ((mm == NULL) || error) {
12777 /* Update the mbuf and count */
12778 SCTP_TCB_SEND_LOCK(stcb);
12779 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12781 * we need to get out. Peer probably
12785 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
12786 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12787 error = ECONNRESET;
12789 SCTP_TCB_SEND_UNLOCK(stcb);
12792 if (sp->tail_mbuf) {
12793 /* tack it to the end */
12794 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
12795 sp->tail_mbuf = new_tail;
12797 /* A stolen mbuf */
12799 sp->tail_mbuf = new_tail;
12801 sctp_snd_sb_alloc(stcb, sndout);
12802 atomic_add_int(&sp->length, sndout);
12805 /* Did we reach EOR? */
12806 if ((uio->uio_resid == 0) &&
12807 ((user_marks_eor == 0) ||
12808 (srcv->sinfo_flags & SCTP_EOF) ||
12809 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12810 sp->msg_is_complete = 1;
12812 sp->msg_is_complete = 0;
12814 SCTP_TCB_SEND_UNLOCK(stcb);
12816 if (uio->uio_resid == 0) {
12821 if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
12823 * This is ugly but we must assure locking
12826 if (hold_tcblock == 0) {
12827 SCTP_TCB_LOCK(stcb);
12830 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
12831 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12832 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12833 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12839 SCTP_TCB_UNLOCK(stcb);
12842 /* wait for space now */
12843 if (non_blocking) {
12844 /* Non-blocking io in place out */
12847 /* What about the INIT, send it maybe */
12848 if (queue_only_for_init) {
12849 if (hold_tcblock == 0) {
12850 SCTP_TCB_LOCK(stcb);
12853 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
12854 /* a collision took us forward? */
12857 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
12858 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12862 if ((net->flight_size > net->cwnd) &&
12863 (asoc->sctp_cmt_on_off == 0)) {
12864 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
12866 } else if (asoc->ifp_had_enobuf) {
12867 SCTP_STAT_INCR(sctps_ifnomemqueued);
12868 if (net->flight_size > (2 * net->mtu)) {
12871 asoc->ifp_had_enobuf = 0;
12873 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
12874 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
12875 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
12876 (stcb->asoc.total_flight > 0) &&
12877 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
12878 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
12881 * Ok, Nagle is set on and we have data outstanding.
12882 * Don't send anything and let SACKs drive out the
12883 * data unless wen have a "full" segment to send.
12885 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12886 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
12888 SCTP_STAT_INCR(sctps_naglequeued);
12891 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12892 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
12893 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
12895 SCTP_STAT_INCR(sctps_naglesent);
12898 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12900 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
12901 nagle_applies, un_sent);
12902 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
12903 stcb->asoc.total_flight,
12904 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
12906 if (queue_only_for_init)
12907 queue_only_for_init = 0;
12908 if ((queue_only == 0) && (nagle_applies == 0)) {
12910 * need to start chunk output
12911 * before blocking.. note that if
12912 * a lock is already applied, then
12913 * the input via the net is happening
12914 * and I don't need to start output :-D
12916 if (hold_tcblock == 0) {
12917 if (SCTP_TCB_TRYLOCK(stcb)) {
12919 sctp_chunk_output(inp,
12921 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
12924 sctp_chunk_output(inp,
12926 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
12928 if (hold_tcblock == 1) {
12929 SCTP_TCB_UNLOCK(stcb);
12933 SOCKBUF_LOCK(&so->so_snd);
12935 * This is a bit strange, but I think it will
12936 * work. The total_output_queue_size is locked and
12937 * protected by the TCB_LOCK, which we just released.
12938 * There is a race that can occur between releasing it
12939 * above, and me getting the socket lock, where sacks
12940 * come in but we have not put the SB_WAIT on the
12941 * so_snd buffer to get the wakeup. After the LOCK
12942 * is applied the sack_processing will also need to
12943 * LOCK the so->so_snd to do the actual sowwakeup(). So
12944 * once we have the socket buffer lock if we recheck the
12945 * size we KNOW we will get to sleep safely with the
12946 * wakeup flag in place.
12948 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
12949 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
12950 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12951 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
12952 asoc, uio->uio_resid);
12955 stcb->block_entry = &be;
12956 error = sbwait(&so->so_snd);
12957 stcb->block_entry = NULL;
12959 if (error || so->so_error || be.error) {
12962 error = so->so_error;
12967 SOCKBUF_UNLOCK(&so->so_snd);
12970 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12971 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12972 asoc, stcb->asoc.total_output_queue_size);
12975 SOCKBUF_UNLOCK(&so->so_snd);
12976 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12980 SCTP_TCB_SEND_LOCK(stcb);
12982 if (sp->msg_is_complete == 0) {
12983 strm->last_msg_incomplete = 1;
12984 asoc->stream_locked = 1;
12985 asoc->stream_locked_on = srcv->sinfo_stream;
12987 sp->sender_all_done = 1;
12988 strm->last_msg_incomplete = 0;
12989 asoc->stream_locked = 0;
12992 SCTP_PRINTF("Huh no sp TSNH?\n");
12993 strm->last_msg_incomplete = 0;
12994 asoc->stream_locked = 0;
12996 SCTP_TCB_SEND_UNLOCK(stcb);
12997 if (uio->uio_resid == 0) {
12998 got_all_of_the_send = 1;
13001 /* We send in a 0, since we do NOT have any locks */
13002 error = sctp_msg_append(stcb, net, top, srcv, 0);
13004 if (srcv->sinfo_flags & SCTP_EOF) {
13006 * This should only happen for Panda for the mbuf
13007 * send case, which does NOT yet support EEOR mode.
13008 * Thus, we can just set this flag to do the proper
13011 got_all_of_the_send = 1;
13019 if ((srcv->sinfo_flags & SCTP_EOF) &&
13020 (got_all_of_the_send == 1)) {
13023 SCTP_STAT_INCR(sctps_sends_with_eof);
13025 if (hold_tcblock == 0) {
13026 SCTP_TCB_LOCK(stcb);
13029 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13030 if (TAILQ_EMPTY(&asoc->send_queue) &&
13031 TAILQ_EMPTY(&asoc->sent_queue) &&
13033 if (asoc->locked_on_sending) {
13036 /* there is nothing queued to send, so I'm done... */
13037 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13038 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13039 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13040 struct sctp_nets *netp;
13042 /* only send SHUTDOWN the first time through */
13043 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13044 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13046 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13047 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13048 sctp_stop_timers_for_shutdown(stcb);
13049 if (stcb->asoc.alternate) {
13050 netp = stcb->asoc.alternate;
13052 netp = stcb->asoc.primary_destination;
13054 sctp_send_shutdown(stcb, netp);
13055 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13057 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13058 asoc->primary_destination);
13062 * we still got (or just got) data to send, so set
13066 * XXX sockets draft says that SCTP_EOF should be
13067 * sent with no data. currently, we will allow user
13068 * data to be sent first and move to
13071 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13072 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13073 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13074 if (hold_tcblock == 0) {
13075 SCTP_TCB_LOCK(stcb);
13078 if (asoc->locked_on_sending) {
13079 /* Locked to send out the data */
13080 struct sctp_stream_queue_pending *sp;
13082 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13084 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13085 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13088 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13089 if (TAILQ_EMPTY(&asoc->send_queue) &&
13090 TAILQ_EMPTY(&asoc->sent_queue) &&
13091 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13093 if (free_cnt_applied) {
13094 atomic_add_int(&stcb->asoc.refcnt, -1);
13095 free_cnt_applied = 0;
13097 sctp_abort_an_association(stcb->sctp_ep, stcb,
13098 NULL, SCTP_SO_LOCKED);
13100 * now relock the stcb so everything
13107 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13108 asoc->primary_destination);
13109 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13114 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13115 some_on_control = 1;
13117 if (queue_only_for_init) {
13118 if (hold_tcblock == 0) {
13119 SCTP_TCB_LOCK(stcb);
13122 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13123 /* a collision took us forward? */
13126 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13127 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13131 if ((net->flight_size > net->cwnd) &&
13132 (stcb->asoc.sctp_cmt_on_off == 0)) {
13133 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13135 } else if (asoc->ifp_had_enobuf) {
13136 SCTP_STAT_INCR(sctps_ifnomemqueued);
13137 if (net->flight_size > (2 * net->mtu)) {
13140 asoc->ifp_had_enobuf = 0;
13142 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13143 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13144 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13145 (stcb->asoc.total_flight > 0) &&
13146 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13147 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13149 * Ok, Nagle is set on and we have data outstanding.
13150 * Don't send anything and let SACKs drive out the
13151 * data unless wen have a "full" segment to send.
13153 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13154 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13156 SCTP_STAT_INCR(sctps_naglequeued);
13159 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13160 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13161 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13163 SCTP_STAT_INCR(sctps_naglesent);
13166 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13167 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13168 nagle_applies, un_sent);
13169 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13170 stcb->asoc.total_flight,
13171 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13173 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13174 /* we can attempt to send too. */
13175 if (hold_tcblock == 0) {
13177 * If there is activity recv'ing sacks no need to
13180 if (SCTP_TCB_TRYLOCK(stcb)) {
13181 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13185 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13187 } else if ((queue_only == 0) &&
13188 (stcb->asoc.peers_rwnd == 0) &&
13189 (stcb->asoc.total_flight == 0)) {
13190 /* We get to have a probe outstanding */
13191 if (hold_tcblock == 0) {
13193 SCTP_TCB_LOCK(stcb);
13195 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13196 } else if (some_on_control) {
13197 int num_out, reason, frag_point;
13199 /* Here we do control only */
13200 if (hold_tcblock == 0) {
13202 SCTP_TCB_LOCK(stcb);
13204 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13205 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13206 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13208 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13209 queue_only, stcb->asoc.peers_rwnd, un_sent,
13210 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13211 stcb->asoc.total_output_queue_size, error);
13216 if (local_soresv && stcb) {
13217 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13219 if (create_lock_applied) {
13220 SCTP_ASOC_CREATE_UNLOCK(inp);
13222 if ((stcb) && hold_tcblock) {
13223 SCTP_TCB_UNLOCK(stcb);
13225 if (stcb && free_cnt_applied) {
13226 atomic_add_int(&stcb->asoc.refcnt, -1);
13230 if (mtx_owned(&stcb->tcb_mtx)) {
13231 panic("Leaving with tcb mtx owned?");
13233 if (mtx_owned(&stcb->tcb_send_mtx)) {
13234 panic("Leaving with tcb send mtx owned?");
13240 sctp_validate_no_locks(inp);
13242 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
13249 sctp_m_freem(control);
13256 * generate an AUTHentication chunk, if required
13259 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13260 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13261 struct sctp_tcb *stcb, uint8_t chunk)
13263 struct mbuf *m_auth;
13264 struct sctp_auth_chunk *auth;
13268 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13272 /* sysctl disabled auth? */
13273 if (SCTP_BASE_SYSCTL(sctp_auth_disable))
13276 /* peer doesn't do auth... */
13277 if (!stcb->asoc.peer_supports_auth) {
13280 /* does the requested chunk require auth? */
13281 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13284 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_DONTWAIT, 1, MT_HEADER);
13285 if (m_auth == NULL) {
13289 /* reserve some space if this will be the first mbuf */
13291 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13292 /* fill in the AUTH chunk details */
13293 auth = mtod(m_auth, struct sctp_auth_chunk *);
13294 bzero(auth, sizeof(*auth));
13295 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13296 auth->ch.chunk_flags = 0;
13297 chunk_len = sizeof(*auth) +
13298 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13299 auth->ch.chunk_length = htons(chunk_len);
13300 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13301 /* key id and hmac digest will be computed and filled in upon send */
13303 /* save the offset where the auth was inserted into the chain */
13305 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13306 *offset += SCTP_BUF_LEN(cn);
13309 /* update length and return pointer to the auth chunk */
13310 SCTP_BUF_LEN(m_auth) = chunk_len;
13311 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13312 if (auth_ret != NULL)
13320 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13322 struct nd_prefix *pfx = NULL;
13323 struct nd_pfxrouter *pfxrtr = NULL;
13324 struct sockaddr_in6 gw6;
13326 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13329 /* get prefix entry of address */
13330 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13331 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13333 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13334 &src6->sin6_addr, &pfx->ndpr_mask))
13337 /* no prefix entry in the prefix list */
13339 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13340 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13343 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13344 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13346 /* search installed gateway from prefix entry */
13347 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13348 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13349 gw6.sin6_family = AF_INET6;
13350 gw6.sin6_len = sizeof(struct sockaddr_in6);
13351 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13352 sizeof(struct in6_addr));
13353 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13354 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13355 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13356 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13357 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13358 ro->ro_rt->rt_gateway)) {
13359 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13363 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13370 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13373 struct sockaddr_in *sin, *mask;
13374 struct ifaddr *ifa;
13375 struct in_addr srcnetaddr, gwnetaddr;
13377 if (ro == NULL || ro->ro_rt == NULL ||
13378 sifa->address.sa.sa_family != AF_INET) {
13381 ifa = (struct ifaddr *)sifa->ifa;
13382 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13383 sin = (struct sockaddr_in *)&sifa->address.sin;
13384 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13385 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13386 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13387 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13389 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13390 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13391 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13392 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13393 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13394 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {