2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctp_var.h>
44 #include <netinet6/sctp6_var.h>
45 #include <netinet/sctp_sysctl.h>
46 #include <netinet/sctp_output.h>
47 #include <netinet/sctp_uio.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctputil.h>
50 #include <netinet/sctp_indata.h>
51 #include <netinet/sctp_timer.h>
52 #include <netinet/sctp_auth.h>
53 #include <netinet/sctp_input.h>
54 #include <netinet/sctp_output.h>
55 #include <netinet/sctp_bsd_addr.h>
56 #include <netinet/sctp_crc32.h>
57 #include <netinet/icmp6.h>
58 #include <netinet/udp.h>
60 extern struct protosw inetsw[];
63 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port)
69 struct sockaddr_in6 src, dst;
72 struct sctp_chunkhdr *ch;
80 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) {
81 SCTP_RELEASE_PKT(*i_pak);
82 return (IPPROTO_DONE);
84 m = SCTP_HEADER_TO_CHAIN(*i_pak);
85 #ifdef SCTP_MBUF_LOGGING
86 /* Log in any input mbufs */
87 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
88 sctp_log_mbc(m, SCTP_MBUF_INPUT);
91 #ifdef SCTP_PACKET_LOGGING
92 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
96 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
97 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
99 if_name(m->m_pkthdr.rcvif),
100 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
101 mflowid = m->m_pkthdr.flowid;
102 mflowtype = M_HASHTYPE_GET(m);
103 fibnum = M_GETFIB(m);
104 SCTP_STAT_INCR(sctps_recvpackets);
105 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
106 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
107 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
108 ip6 = mtod(m, struct ip6_hdr *);
109 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen,
110 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)));
112 SCTP_STAT_INCR(sctps_hdrops);
113 return (IPPROTO_DONE);
115 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
116 offset -= sizeof(struct sctp_chunkhdr);
117 memset(&src, 0, sizeof(struct sockaddr_in6));
118 src.sin6_family = AF_INET6;
119 src.sin6_len = sizeof(struct sockaddr_in6);
120 src.sin6_port = sh->src_port;
121 src.sin6_addr = ip6->ip6_src;
122 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
125 memset(&dst, 0, sizeof(struct sockaddr_in6));
126 dst.sin6_family = AF_INET6;
127 dst.sin6_len = sizeof(struct sockaddr_in6);
128 dst.sin6_port = sh->dest_port;
129 dst.sin6_addr = ip6->ip6_dst;
130 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
133 length = ntohs(ip6->ip6_plen) + iphlen;
134 /* Validate mbuf chain length with IP payload length. */
135 if (SCTP_HEADER_LEN(m) != length) {
136 SCTPDBG(SCTP_DEBUG_INPUT1,
137 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
138 SCTP_STAT_INCR(sctps_hdrops);
141 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
144 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
145 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
146 SCTP_STAT_INCR(sctps_recvhwcrc);
149 SCTP_STAT_INCR(sctps_recvswcrc);
152 sctp_common_input_processing(&m, iphlen, offset, length,
153 (struct sockaddr *)&src,
154 (struct sockaddr *)&dst,
158 mflowtype, mflowid, fibnum,
164 return (IPPROTO_DONE);
169 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
171 return (sctp6_input_with_port(i_pak, offp, 0));
175 sctp6_notify(struct sctp_inpcb *inp,
176 struct sctp_tcb *stcb,
177 struct sctp_nets *net,
182 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
187 switch (icmp6_type) {
188 case ICMP6_DST_UNREACH:
189 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) ||
190 (icmp6_code == ICMP6_DST_UNREACH_ADMIN) ||
191 (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) ||
192 (icmp6_code == ICMP6_DST_UNREACH_ADDR)) {
193 /* Mark the net unreachable. */
194 if (net->dest_state & SCTP_ADDR_REACHABLE) {
195 /* Ok that destination is not reachable */
196 net->dest_state &= ~SCTP_ADDR_REACHABLE;
197 net->dest_state &= ~SCTP_ADDR_PF;
198 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
199 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
202 SCTP_TCB_UNLOCK(stcb);
204 case ICMP6_PARAM_PROB:
205 /* Treat it like an ABORT. */
206 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) {
207 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED);
208 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
209 so = SCTP_INP_SO(inp);
210 atomic_add_int(&stcb->asoc.refcnt, 1);
211 SCTP_TCB_UNLOCK(stcb);
212 SCTP_SOCKET_LOCK(so, 1);
214 atomic_subtract_int(&stcb->asoc.refcnt, 1);
216 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
217 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2);
218 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
219 SCTP_SOCKET_UNLOCK(so, 1);
222 SCTP_TCB_UNLOCK(stcb);
225 case ICMP6_PACKET_TOO_BIG:
226 if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
227 SCTP_TCB_UNLOCK(stcb);
230 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) {
232 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
233 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1);
237 /* Update the path MTU. */
239 next_mtu -= sizeof(struct udphdr);
241 if (net->mtu > next_mtu) {
244 /* Update the association MTU */
245 if (stcb->asoc.smallest_mtu > next_mtu) {
246 sctp_pathmtu_adjustment(stcb, next_mtu);
248 /* Finally, start the PMTU timer if it was running before. */
250 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
252 SCTP_TCB_UNLOCK(stcb);
255 SCTP_TCB_UNLOCK(stcb);
261 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
263 struct ip6ctlparam *ip6cp;
264 struct sctp_inpcb *inp;
265 struct sctp_tcb *stcb;
266 struct sctp_nets *net;
268 struct sockaddr_in6 src, dst;
270 if (pktdst->sa_family != AF_INET6 ||
271 pktdst->sa_len != sizeof(struct sockaddr_in6)) {
274 if ((unsigned)cmd >= PRC_NCMDS) {
277 if (PRC_IS_REDIRECT(cmd)) {
279 } else if (inet6ctlerrmap[cmd] == 0) {
282 /* If the parameter is from icmp6, decode it. */
284 ip6cp = (struct ip6ctlparam *)d;
286 ip6cp = (struct ip6ctlparam *)NULL;
291 * XXX: We assume that when IPV6 is non NULL, M and OFF are
294 if (ip6cp->ip6c_m == NULL) {
298 * Check if we can safely examine the ports and the
299 * verification tag of the SCTP common header.
301 if (ip6cp->ip6c_m->m_pkthdr.len <
302 (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) {
305 /* Copy out the port numbers and the verification tag. */
306 memset(&sh, 0, sizeof(sh));
307 m_copydata(ip6cp->ip6c_m,
309 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
311 memset(&src, 0, sizeof(struct sockaddr_in6));
312 src.sin6_family = AF_INET6;
313 src.sin6_len = sizeof(struct sockaddr_in6);
314 src.sin6_port = sh.src_port;
315 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
316 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
319 memset(&dst, 0, sizeof(struct sockaddr_in6));
320 dst.sin6_family = AF_INET6;
321 dst.sin6_len = sizeof(struct sockaddr_in6);
322 dst.sin6_port = sh.dest_port;
323 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
324 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
329 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
330 (struct sockaddr *)&src,
331 &inp, &net, 1, SCTP_DEFAULT_VRFID);
332 if ((stcb != NULL) &&
335 /* Check the verification tag */
336 if (ntohl(sh.v_tag) != 0) {
338 * This must be the verification tag used
339 * for sending out packets. We don't
340 * consider packets reflecting the
343 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
344 SCTP_TCB_UNLOCK(stcb);
348 if (ip6cp->ip6c_m->m_pkthdr.len >=
349 ip6cp->ip6c_off + sizeof(struct sctphdr) +
350 sizeof(struct sctp_chunkhdr) +
351 offsetof(struct sctp_init, a_rwnd)) {
353 * In this case we can check if we
354 * got an INIT chunk and if the
355 * initiate tag matches.
357 uint32_t initiate_tag;
360 m_copydata(ip6cp->ip6c_m,
362 sizeof(struct sctphdr),
364 (caddr_t)&chunk_type);
365 m_copydata(ip6cp->ip6c_m,
367 sizeof(struct sctphdr) +
368 sizeof(struct sctp_chunkhdr),
370 (caddr_t)&initiate_tag);
371 if ((chunk_type != SCTP_INITIATION) ||
372 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
373 SCTP_TCB_UNLOCK(stcb);
377 SCTP_TCB_UNLOCK(stcb);
381 sctp6_notify(inp, stcb, net,
382 ip6cp->ip6c_icmp6->icmp6_type,
383 ip6cp->ip6c_icmp6->icmp6_code,
384 ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
386 if ((stcb == NULL) && (inp != NULL)) {
387 /* reduce inp's ref-count */
389 SCTP_INP_DECR_REF(inp);
390 SCTP_INP_WUNLOCK(inp);
393 SCTP_TCB_UNLOCK(stcb);
400 * this routine can probably be collasped into the one in sctp_userreq.c
401 * since they do the same thing and now we lookup with a sockaddr
404 sctp6_getcred(SYSCTL_HANDLER_ARGS)
407 struct sockaddr_in6 addrs[2];
408 struct sctp_inpcb *inp;
409 struct sctp_nets *net;
410 struct sctp_tcb *stcb;
414 vrf_id = SCTP_DEFAULT_VRFID;
416 error = priv_check(req->td, PRIV_NETINET_GETCRED);
420 if (req->newlen != sizeof(addrs)) {
421 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
424 if (req->oldlen != sizeof(struct ucred)) {
425 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
428 error = SYSCTL_IN(req, addrs, sizeof(addrs));
432 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
434 &inp, &net, 1, vrf_id);
435 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
436 if ((inp != NULL) && (stcb == NULL)) {
437 /* reduce ref-count */
439 SCTP_INP_DECR_REF(inp);
442 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
446 SCTP_TCB_UNLOCK(stcb);
448 * We use the write lock here, only since in the error leg we need
449 * it. If we used RLOCK, then we would have to
450 * wlock/decr/unlock/rlock. Which in theory could create a hole.
451 * Better to use higher wlock.
455 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
457 SCTP_INP_WUNLOCK(inp);
460 cru2x(inp->sctp_socket->so_cred, &xuc);
461 SCTP_INP_WUNLOCK(inp);
462 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
467 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
469 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
472 /* This is the same as the sctp_abort() could be made common */
474 sctp6_abort(struct socket *so)
476 struct sctp_inpcb *inp;
479 inp = (struct sctp_inpcb *)so->so_pcb;
481 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
485 flags = inp->sctp_flags;
486 #ifdef SCTP_LOG_CLOSING
487 sctp_log_closing(inp, NULL, 17);
489 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
490 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
491 #ifdef SCTP_LOG_CLOSING
492 sctp_log_closing(inp, NULL, 16);
494 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
495 SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
497 SCTP_SB_CLEAR(so->so_snd);
499 * same for the rcv ones, they are only here for the
502 SCTP_SB_CLEAR(so->so_rcv);
503 /* Now null out the reference, we are completely detached. */
507 flags = inp->sctp_flags;
508 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
509 goto sctp_must_try_again;
516 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
520 struct sctp_inpcb *inp;
521 uint32_t vrf_id = SCTP_DEFAULT_VRFID;
523 inp = (struct sctp_inpcb *)so->so_pcb;
525 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
528 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
529 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
533 error = sctp_inpcb_alloc(so, vrf_id);
536 inp = (struct sctp_inpcb *)so->so_pcb;
538 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */
539 inp6 = (struct in6pcb *)inp;
541 inp6->inp_vflag |= INP_IPV6;
542 inp6->in6p_hops = -1; /* use kernel default */
543 inp6->in6p_cksum = -1; /* just to be sure */
546 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
547 * socket as well, because the socket may be bound to an IPv6
548 * wildcard address, which may match an IPv4-mapped IPv6 address.
550 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
552 SCTP_INP_WUNLOCK(inp);
557 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
559 struct sctp_inpcb *inp;
563 inp = (struct sctp_inpcb *)so->so_pcb;
565 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
569 switch (addr->sa_family) {
572 if (addr->sa_len != sizeof(struct sockaddr_in)) {
573 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
580 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
581 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
587 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
591 inp6 = (struct in6pcb *)inp;
592 inp6->inp_vflag &= ~INP_IPV4;
593 inp6->inp_vflag |= INP_IPV6;
594 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) {
595 switch (addr->sa_family) {
598 /* binding v4 addr to v6 socket, so reset flags */
599 inp6->inp_vflag |= INP_IPV4;
600 inp6->inp_vflag &= ~INP_IPV6;
606 struct sockaddr_in6 *sin6_p;
608 sin6_p = (struct sockaddr_in6 *)addr;
610 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
611 inp6->inp_vflag |= INP_IPV4;
614 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
615 struct sockaddr_in sin;
617 in6_sin6_2_sin(&sin, sin6_p);
618 inp6->inp_vflag |= INP_IPV4;
619 inp6->inp_vflag &= ~INP_IPV6;
620 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
630 } else if (addr != NULL) {
631 struct sockaddr_in6 *sin6_p;
633 /* IPV6_V6ONLY socket */
635 if (addr->sa_family == AF_INET) {
636 /* can't bind v4 addr to v6 only socket! */
637 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
641 sin6_p = (struct sockaddr_in6 *)addr;
643 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
644 /* can't bind v4-mapped addrs either! */
645 /* NOTE: we don't support SIIT */
646 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
650 error = sctp_inpcb_bind(so, addr, NULL, p);
656 sctp6_close(struct socket *so)
661 /* This could be made common with sctp_detach() since they are identical */
665 sctp6_disconnect(struct socket *so)
667 return (sctp_disconnect(so));
672 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
673 struct mbuf *control, struct thread *p);
677 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
678 struct mbuf *control, struct thread *p)
680 struct sctp_inpcb *inp;
684 struct sockaddr_in6 *sin6;
686 /* No SPL needed since sctp_output does this */
688 inp = (struct sctp_inpcb *)so->so_pcb;
691 SCTP_RELEASE_PKT(control);
695 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
698 inp6 = (struct in6pcb *)inp;
700 * For the TCP model we may get a NULL addr, if we are a connected
703 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
710 SCTP_RELEASE_PKT(control);
713 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
714 return (EDESTADDRREQ);
717 sin6 = (struct sockaddr_in6 *)addr;
718 if (SCTP_IPV6_V6ONLY(inp6)) {
720 * if IPV6_V6ONLY flag, we discard datagrams destined to a
721 * v4 addr or v4-mapped addr
723 if (addr->sa_family == AF_INET) {
724 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
727 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
728 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
732 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
733 struct sockaddr_in sin;
735 /* convert v4-mapped into v4 addr and send */
736 in6_sin6_2_sin(&sin, sin6);
737 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
741 /* now what about control */
744 SCTP_PRINTF("huh? control set?\n");
745 SCTP_RELEASE_PKT(inp->control);
748 inp->control = control;
752 SCTP_BUF_NEXT(inp->pkt_last) = m;
755 inp->pkt_last = inp->pkt = m;
758 /* FreeBSD and MacOSX uses a flag passed */
759 ((flags & PRUS_MORETOCOME) == 0)
762 * note with the current version this code will only be used
763 * by OpenBSD, NetBSD and FreeBSD have methods for
764 * re-defining sosend() to use sctp_sosend(). One can
765 * optionaly switch back to this code (by changing back the
766 * defininitions but this is not advisable.
770 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
780 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
784 struct sctp_inpcb *inp;
785 struct sctp_tcb *stcb;
788 struct sockaddr_in6 *sin6;
789 union sctp_sockstore store;
793 inp6 = (struct in6pcb *)so->so_pcb;
795 inp = (struct sctp_inpcb *)so->so_pcb;
797 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
798 return (ECONNRESET); /* I made the same as TCP since we are
802 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
805 switch (addr->sa_family) {
808 if (addr->sa_len != sizeof(struct sockaddr_in)) {
809 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
816 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
817 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
823 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
827 vrf_id = inp->def_vrf_id;
828 SCTP_ASOC_CREATE_LOCK(inp);
830 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
831 SCTP_PCB_FLAGS_UNBOUND) {
832 /* Bind a ephemeral port */
833 SCTP_INP_RUNLOCK(inp);
834 error = sctp6_bind(so, NULL, p);
836 SCTP_ASOC_CREATE_UNLOCK(inp);
842 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
843 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
844 /* We are already connected AND the TCP model */
845 SCTP_INP_RUNLOCK(inp);
846 SCTP_ASOC_CREATE_UNLOCK(inp);
847 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
851 sin6 = (struct sockaddr_in6 *)addr;
852 if (SCTP_IPV6_V6ONLY(inp6)) {
854 * if IPV6_V6ONLY flag, ignore connections destined to a v4
855 * addr or v4-mapped addr
857 if (addr->sa_family == AF_INET) {
858 SCTP_INP_RUNLOCK(inp);
859 SCTP_ASOC_CREATE_UNLOCK(inp);
860 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
863 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
864 SCTP_INP_RUNLOCK(inp);
865 SCTP_ASOC_CREATE_UNLOCK(inp);
866 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
870 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
871 /* convert v4-mapped into v4 addr */
872 in6_sin6_2_sin(&store.sin, sin6);
876 /* Now do we connect? */
877 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
878 stcb = LIST_FIRST(&inp->sctp_asoc_list);
882 SCTP_INP_RUNLOCK(inp);
884 SCTP_INP_RUNLOCK(inp);
886 SCTP_INP_INCR_REF(inp);
887 SCTP_INP_WUNLOCK(inp);
888 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
891 SCTP_INP_DECR_REF(inp);
892 SCTP_INP_WUNLOCK(inp);
897 /* Already have or am bring up an association */
898 SCTP_ASOC_CREATE_UNLOCK(inp);
899 SCTP_TCB_UNLOCK(stcb);
900 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
903 /* We are GOOD to go */
904 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
905 inp->sctp_ep.pre_open_stream_count,
906 inp->sctp_ep.port, p);
907 SCTP_ASOC_CREATE_UNLOCK(inp);
912 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
913 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
914 /* Set the connected flag so we can queue data */
917 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT;
918 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
920 /* initialize authentication parameters for the assoc */
921 sctp_initialize_auth_params(inp, stcb);
923 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
924 SCTP_TCB_UNLOCK(stcb);
929 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
931 struct sockaddr_in6 *sin6;
932 struct sctp_inpcb *inp;
934 struct sctp_ifa *sctp_ifa;
939 * Do the malloc first in case it blocks.
941 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
944 sin6->sin6_family = AF_INET6;
945 sin6->sin6_len = sizeof(*sin6);
947 inp = (struct sctp_inpcb *)so->so_pcb;
949 SCTP_FREE_SONAME(sin6);
950 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
954 sin6->sin6_port = inp->sctp_lport;
955 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
956 /* For the bound all case you get back 0 */
957 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
958 struct sctp_tcb *stcb;
959 struct sockaddr_in6 *sin_a6;
960 struct sctp_nets *net;
963 stcb = LIST_FIRST(&inp->sctp_asoc_list);
965 SCTP_INP_RUNLOCK(inp);
966 SCTP_FREE_SONAME(sin6);
967 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
972 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
973 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
975 /* this will make coverity happy */
978 if (sin_a6->sin6_family == AF_INET6) {
983 if ((!fnd) || (sin_a6 == NULL)) {
985 SCTP_INP_RUNLOCK(inp);
986 SCTP_FREE_SONAME(sin6);
987 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
990 vrf_id = inp->def_vrf_id;
991 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id);
993 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
996 /* For the bound all case you get back 0 */
997 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
1000 /* Take the first IPv6 address in the list */
1001 struct sctp_laddr *laddr;
1004 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1005 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
1006 struct sockaddr_in6 *sin_a;
1008 sin_a = &laddr->ifa->address.sin6;
1009 sin6->sin6_addr = sin_a->sin6_addr;
1015 SCTP_FREE_SONAME(sin6);
1016 SCTP_INP_RUNLOCK(inp);
1017 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1021 SCTP_INP_RUNLOCK(inp);
1022 /* Scoping things for v6 */
1023 if ((error = sa6_recoverscope(sin6)) != 0) {
1024 SCTP_FREE_SONAME(sin6);
1027 (*addr) = (struct sockaddr *)sin6;
1032 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1034 struct sockaddr_in6 *sin6;
1036 struct sockaddr_in6 *sin_a6;
1037 struct sctp_inpcb *inp;
1038 struct sctp_tcb *stcb;
1039 struct sctp_nets *net;
1042 /* Do the malloc first in case it blocks. */
1043 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1046 sin6->sin6_family = AF_INET6;
1047 sin6->sin6_len = sizeof(*sin6);
1049 inp = (struct sctp_inpcb *)so->so_pcb;
1050 if ((inp == NULL) ||
1051 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
1052 /* UDP type and listeners will drop out here */
1053 SCTP_FREE_SONAME(sin6);
1054 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
1057 SCTP_INP_RLOCK(inp);
1058 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1060 SCTP_TCB_LOCK(stcb);
1062 SCTP_INP_RUNLOCK(inp);
1064 SCTP_FREE_SONAME(sin6);
1065 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1066 return (ECONNRESET);
1069 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1070 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1071 if (sin_a6->sin6_family == AF_INET6) {
1073 sin6->sin6_port = stcb->rport;
1074 sin6->sin6_addr = sin_a6->sin6_addr;
1078 SCTP_TCB_UNLOCK(stcb);
1080 /* No IPv4 address */
1081 SCTP_FREE_SONAME(sin6);
1082 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1085 if ((error = sa6_recoverscope(sin6)) != 0) {
1086 SCTP_FREE_SONAME(sin6);
1087 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error);
1090 *addr = (struct sockaddr *)sin6;
1095 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1097 struct in6pcb *inp6 = sotoin6pcb(so);
1101 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1104 /* allow v6 addresses precedence */
1105 error = sctp6_getaddr(so, nam);
1108 struct sockaddr_in6 *sin6;
1110 /* try v4 next if v6 failed */
1111 error = sctp_ingetaddr(so, nam);
1115 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1117 SCTP_FREE_SONAME(*nam);
1120 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1121 SCTP_FREE_SONAME(*nam);
1122 *nam = (struct sockaddr *)sin6;
1130 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1132 struct in6pcb *inp6 = sotoin6pcb(so);
1136 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1139 /* allow v6 addresses precedence */
1140 error = sctp6_peeraddr(so, nam);
1143 struct sockaddr_in6 *sin6;
1145 /* try v4 next if v6 failed */
1146 error = sctp_peeraddr(so, nam);
1150 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1152 SCTP_FREE_SONAME(*nam);
1155 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1156 SCTP_FREE_SONAME(*nam);
1157 *nam = (struct sockaddr *)sin6;
1163 struct pr_usrreqs sctp6_usrreqs = {
1164 .pru_abort = sctp6_abort,
1165 .pru_accept = sctp_accept,
1166 .pru_attach = sctp6_attach,
1167 .pru_bind = sctp6_bind,
1168 .pru_connect = sctp6_connect,
1169 .pru_control = in6_control,
1170 .pru_close = sctp6_close,
1171 .pru_detach = sctp6_close,
1172 .pru_sopoll = sopoll_generic,
1173 .pru_flush = sctp_flush,
1174 .pru_disconnect = sctp6_disconnect,
1175 .pru_listen = sctp_listen,
1176 .pru_peeraddr = sctp6_getpeeraddr,
1177 .pru_send = sctp6_send,
1178 .pru_shutdown = sctp_shutdown,
1179 .pru_sockaddr = sctp6_in6getaddr,
1180 .pru_sosend = sctp_sosend,
1181 .pru_soreceive = sctp_soreceive