2 * Copyright (c) 2001-2007, 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>
39 #include <netinet/sctp_pcb.h>
40 #include <netinet/sctp_header.h>
41 #include <netinet/sctp_var.h>
42 #include <netinet6/sctp6_var.h>
43 #include <netinet/sctp_sysctl.h>
44 #include <netinet/sctp_output.h>
45 #include <netinet/sctp_uio.h>
46 #include <netinet/sctp_asconf.h>
47 #include <netinet/sctputil.h>
48 #include <netinet/sctp_indata.h>
49 #include <netinet/sctp_timer.h>
50 #include <netinet/sctp_auth.h>
51 #include <netinet/sctp_input.h>
52 #include <netinet/sctp_output.h>
53 #include <netinet/sctp_bsd_addr.h>
54 #include <netinet/sctp_crc32.h>
55 #include <netinet/icmp6.h>
56 #include <netinet/udp.h>
58 extern struct protosw inetsw[];
61 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port)
67 struct sockaddr_in6 src, dst;
70 struct sctp_chunkhdr *ch;
78 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) {
79 SCTP_RELEASE_PKT(*i_pak);
80 return (IPPROTO_DONE);
82 m = SCTP_HEADER_TO_CHAIN(*i_pak);
83 #ifdef SCTP_MBUF_LOGGING
84 /* Log in any input mbufs */
85 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
86 sctp_log_mbc(m, SCTP_MBUF_INPUT);
89 #ifdef SCTP_PACKET_LOGGING
90 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
94 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
95 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
97 if_name(m->m_pkthdr.rcvif),
98 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
99 mflowid = m->m_pkthdr.flowid;
100 mflowtype = M_HASHTYPE_GET(m);
101 fibnum = M_GETFIB(m);
102 SCTP_STAT_INCR(sctps_recvpackets);
103 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
104 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
105 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
106 ip6 = mtod(m, struct ip6_hdr *);
107 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen,
108 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)));
110 SCTP_STAT_INCR(sctps_hdrops);
111 return (IPPROTO_DONE);
113 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
114 offset -= sizeof(struct sctp_chunkhdr);
115 memset(&src, 0, sizeof(struct sockaddr_in6));
116 src.sin6_family = AF_INET6;
117 src.sin6_len = sizeof(struct sockaddr_in6);
118 src.sin6_port = sh->src_port;
119 src.sin6_addr = ip6->ip6_src;
120 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
123 memset(&dst, 0, sizeof(struct sockaddr_in6));
124 dst.sin6_family = AF_INET6;
125 dst.sin6_len = sizeof(struct sockaddr_in6);
126 dst.sin6_port = sh->dest_port;
127 dst.sin6_addr = ip6->ip6_dst;
128 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
131 length = ntohs(ip6->ip6_plen) + iphlen;
132 /* Validate mbuf chain length with IP payload length. */
133 if (SCTP_HEADER_LEN(m) != length) {
134 SCTPDBG(SCTP_DEBUG_INPUT1,
135 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
136 SCTP_STAT_INCR(sctps_hdrops);
139 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
142 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
143 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
144 SCTP_STAT_INCR(sctps_recvhwcrc);
147 SCTP_STAT_INCR(sctps_recvswcrc);
150 sctp_common_input_processing(&m, iphlen, offset, length,
151 (struct sockaddr *)&src,
152 (struct sockaddr *)&dst,
156 mflowtype, mflowid, fibnum,
162 return (IPPROTO_DONE);
167 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
169 return (sctp6_input_with_port(i_pak, offp, 0));
173 sctp6_notify(struct sctp_inpcb *inp,
174 struct sctp_tcb *stcb,
175 struct sctp_nets *net,
180 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
185 switch (icmp6_type) {
186 case ICMP6_DST_UNREACH:
187 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) ||
188 (icmp6_code == ICMP6_DST_UNREACH_ADMIN) ||
189 (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) ||
190 (icmp6_code == ICMP6_DST_UNREACH_ADDR)) {
191 /* Mark the net unreachable. */
192 if (net->dest_state & SCTP_ADDR_REACHABLE) {
193 /* Ok that destination is not reachable */
194 net->dest_state &= ~SCTP_ADDR_REACHABLE;
195 net->dest_state &= ~SCTP_ADDR_PF;
196 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
197 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
200 SCTP_TCB_UNLOCK(stcb);
202 case ICMP6_PARAM_PROB:
203 /* Treat it like an ABORT. */
204 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) {
205 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED);
206 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
207 so = SCTP_INP_SO(inp);
208 atomic_add_int(&stcb->asoc.refcnt, 1);
209 SCTP_TCB_UNLOCK(stcb);
210 SCTP_SOCKET_LOCK(so, 1);
212 atomic_subtract_int(&stcb->asoc.refcnt, 1);
214 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
215 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2);
216 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
217 SCTP_SOCKET_UNLOCK(so, 1);
220 SCTP_TCB_UNLOCK(stcb);
223 case ICMP6_PACKET_TOO_BIG:
224 if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
225 SCTP_TCB_UNLOCK(stcb);
228 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) {
230 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
231 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1);
235 /* Update the path MTU. */
237 next_mtu -= sizeof(struct udphdr);
239 if (net->mtu > next_mtu) {
242 /* Update the association MTU */
243 if (stcb->asoc.smallest_mtu > next_mtu) {
244 sctp_pathmtu_adjustment(stcb, next_mtu);
246 /* Finally, start the PMTU timer if it was running before. */
248 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
250 SCTP_TCB_UNLOCK(stcb);
253 SCTP_TCB_UNLOCK(stcb);
259 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
261 struct ip6ctlparam *ip6cp;
262 struct sctp_inpcb *inp;
263 struct sctp_tcb *stcb;
264 struct sctp_nets *net;
266 struct sockaddr_in6 src, dst;
268 if (pktdst->sa_family != AF_INET6 ||
269 pktdst->sa_len != sizeof(struct sockaddr_in6)) {
273 if ((unsigned)cmd >= PRC_NCMDS) {
276 if (PRC_IS_REDIRECT(cmd)) {
278 } else if (inet6ctlerrmap[cmd] == 0) {
281 /* If the parameter is from icmp6, decode it. */
283 ip6cp = (struct ip6ctlparam *)d;
285 ip6cp = (struct ip6ctlparam *)NULL;
290 * XXX: We assume that when IPV6 is non NULL, M and OFF are
293 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))) {
306 /* Copy out the port numbers and the verification tag. */
307 memset(&sh, 0, sizeof(sh));
308 m_copydata(ip6cp->ip6c_m,
310 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
312 memset(&src, 0, sizeof(struct sockaddr_in6));
313 src.sin6_family = AF_INET6;
314 src.sin6_len = sizeof(struct sockaddr_in6);
315 src.sin6_port = sh.src_port;
316 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
317 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
320 memset(&dst, 0, sizeof(struct sockaddr_in6));
321 dst.sin6_family = AF_INET6;
322 dst.sin6_len = sizeof(struct sockaddr_in6);
323 dst.sin6_port = sh.dest_port;
324 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
325 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
330 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
331 (struct sockaddr *)&src,
332 &inp, &net, 1, SCTP_DEFAULT_VRFID);
333 if ((stcb != NULL) &&
336 /* Check the verification tag */
337 if (ntohl(sh.v_tag) != 0) {
339 * This must be the verification tag used
340 * for sending out packets. We don't
341 * consider packets reflecting the
344 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
345 SCTP_TCB_UNLOCK(stcb);
349 if (ip6cp->ip6c_m->m_pkthdr.len >=
350 ip6cp->ip6c_off + sizeof(struct sctphdr) +
351 sizeof(struct sctp_chunkhdr) +
352 offsetof(struct sctp_init, a_rwnd)) {
354 * In this case we can check if we
355 * got an INIT chunk and if the
356 * initiate tag matches.
358 uint32_t initiate_tag;
361 m_copydata(ip6cp->ip6c_m,
363 sizeof(struct sctphdr),
365 (caddr_t)&chunk_type);
366 m_copydata(ip6cp->ip6c_m,
368 sizeof(struct sctphdr) +
369 sizeof(struct sctp_chunkhdr),
371 (caddr_t)&initiate_tag);
372 if ((chunk_type != SCTP_INITIATION) ||
373 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
374 SCTP_TCB_UNLOCK(stcb);
378 SCTP_TCB_UNLOCK(stcb);
382 sctp6_notify(inp, stcb, net,
383 ip6cp->ip6c_icmp6->icmp6_type,
384 ip6cp->ip6c_icmp6->icmp6_code,
385 ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
387 if ((stcb == NULL) && (inp != NULL)) {
388 /* reduce inp's ref-count */
390 SCTP_INP_DECR_REF(inp);
391 SCTP_INP_WUNLOCK(inp);
394 SCTP_TCB_UNLOCK(stcb);
401 * this routine can probably be collasped into the one in sctp_userreq.c
402 * since they do the same thing and now we lookup with a sockaddr
405 sctp6_getcred(SYSCTL_HANDLER_ARGS)
408 struct sockaddr_in6 addrs[2];
409 struct sctp_inpcb *inp;
410 struct sctp_nets *net;
411 struct sctp_tcb *stcb;
415 vrf_id = SCTP_DEFAULT_VRFID;
417 error = priv_check(req->td, PRIV_NETINET_GETCRED);
421 if (req->newlen != sizeof(addrs)) {
422 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
425 if (req->oldlen != sizeof(struct ucred)) {
426 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
429 error = SYSCTL_IN(req, addrs, sizeof(addrs));
433 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
435 &inp, &net, 1, vrf_id);
436 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
437 if ((inp != NULL) && (stcb == NULL)) {
438 /* reduce ref-count */
440 SCTP_INP_DECR_REF(inp);
443 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
447 SCTP_TCB_UNLOCK(stcb);
449 * We use the write lock here, only since in the error leg we need
450 * it. If we used RLOCK, then we would have to
451 * wlock/decr/unlock/rlock. Which in theory could create a hole.
452 * Better to use higher wlock.
456 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
458 SCTP_INP_WUNLOCK(inp);
461 cru2x(inp->sctp_socket->so_cred, &xuc);
462 SCTP_INP_WUNLOCK(inp);
463 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
468 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
470 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
473 /* This is the same as the sctp_abort() could be made common */
475 sctp6_abort(struct socket *so)
477 struct sctp_inpcb *inp;
480 inp = (struct sctp_inpcb *)so->so_pcb;
482 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
486 flags = inp->sctp_flags;
487 #ifdef SCTP_LOG_CLOSING
488 sctp_log_closing(inp, NULL, 17);
490 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
491 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
492 #ifdef SCTP_LOG_CLOSING
493 sctp_log_closing(inp, NULL, 16);
495 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
496 SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
498 SCTP_SB_CLEAR(so->so_snd);
500 * same for the rcv ones, they are only here for the
503 SCTP_SB_CLEAR(so->so_rcv);
504 /* Now null out the reference, we are completely detached. */
508 flags = inp->sctp_flags;
509 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
510 goto sctp_must_try_again;
517 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
521 struct sctp_inpcb *inp;
522 uint32_t vrf_id = SCTP_DEFAULT_VRFID;
524 inp = (struct sctp_inpcb *)so->so_pcb;
526 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
530 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
531 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
535 error = sctp_inpcb_alloc(so, vrf_id);
538 inp = (struct sctp_inpcb *)so->so_pcb;
540 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */
541 inp6 = (struct in6pcb *)inp;
543 inp6->inp_vflag |= INP_IPV6;
544 inp6->in6p_hops = -1; /* use kernel default */
545 inp6->in6p_cksum = -1; /* just to be sure */
548 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
549 * socket as well, because the socket may be bound to an IPv6
550 * wildcard address, which may match an IPv4-mapped IPv6 address.
552 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
554 SCTP_INP_WUNLOCK(inp);
559 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
561 struct sctp_inpcb *inp;
566 inp = (struct sctp_inpcb *)so->so_pcb;
568 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
573 switch (addr->sa_family) {
576 if (addr->sa_len != sizeof(struct sockaddr_in)) {
577 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
584 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
585 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
591 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
595 inp6 = (struct in6pcb *)inp;
596 vflagsav = inp6->inp_vflag;
597 inp6->inp_vflag &= ~INP_IPV4;
598 inp6->inp_vflag |= INP_IPV6;
599 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) {
600 switch (addr->sa_family) {
603 /* binding v4 addr to v6 socket, so reset flags */
604 inp6->inp_vflag |= INP_IPV4;
605 inp6->inp_vflag &= ~INP_IPV6;
611 struct sockaddr_in6 *sin6_p;
613 sin6_p = (struct sockaddr_in6 *)addr;
615 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
616 inp6->inp_vflag |= INP_IPV4;
619 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
620 struct sockaddr_in sin;
622 in6_sin6_2_sin(&sin, sin6_p);
623 inp6->inp_vflag |= INP_IPV4;
624 inp6->inp_vflag &= ~INP_IPV6;
625 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
635 } else if (addr != NULL) {
636 struct sockaddr_in6 *sin6_p;
638 /* IPV6_V6ONLY socket */
640 if (addr->sa_family == AF_INET) {
641 /* can't bind v4 addr to v6 only socket! */
642 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
647 sin6_p = (struct sockaddr_in6 *)addr;
649 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
650 /* can't bind v4-mapped addrs either! */
651 /* NOTE: we don't support SIIT */
652 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
657 error = sctp_inpcb_bind(so, addr, NULL, p);
660 inp6->inp_vflag = vflagsav;
666 sctp6_close(struct socket *so)
671 /* This could be made common with sctp_detach() since they are identical */
675 sctp6_disconnect(struct socket *so)
677 return (sctp_disconnect(so));
682 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
683 struct mbuf *control, struct thread *p);
687 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
688 struct mbuf *control, struct thread *p)
690 struct sctp_inpcb *inp;
694 struct sockaddr_in6 *sin6;
696 /* No SPL needed since sctp_output does this */
698 inp = (struct sctp_inpcb *)so->so_pcb;
701 SCTP_RELEASE_PKT(control);
705 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
708 inp6 = (struct in6pcb *)inp;
710 * For the TCP model we may get a NULL addr, if we are a connected
713 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
720 SCTP_RELEASE_PKT(control);
723 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
724 return (EDESTADDRREQ);
727 sin6 = (struct sockaddr_in6 *)addr;
728 if (SCTP_IPV6_V6ONLY(inp6)) {
730 * if IPV6_V6ONLY flag, we discard datagrams destined to a
731 * v4 addr or v4-mapped addr
733 if (addr->sa_family == AF_INET) {
734 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
737 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
738 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
742 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
743 struct sockaddr_in sin;
745 /* convert v4-mapped into v4 addr and send */
746 in6_sin6_2_sin(&sin, sin6);
747 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
751 /* now what about control */
754 SCTP_PRINTF("huh? control set?\n");
755 SCTP_RELEASE_PKT(inp->control);
758 inp->control = control;
762 SCTP_BUF_NEXT(inp->pkt_last) = m;
765 inp->pkt_last = inp->pkt = m;
768 /* FreeBSD and MacOSX uses a flag passed */
769 ((flags & PRUS_MORETOCOME) == 0)
772 * note with the current version this code will only be used
773 * by OpenBSD, NetBSD and FreeBSD have methods for
774 * re-defining sosend() to use sctp_sosend(). One can
775 * optionaly switch back to this code (by changing back the
776 * defininitions but this is not advisable.
780 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
790 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
794 struct sctp_inpcb *inp;
795 struct sctp_tcb *stcb;
798 struct sockaddr_in6 *sin6;
799 union sctp_sockstore store;
803 inp6 = (struct in6pcb *)so->so_pcb;
805 inp = (struct sctp_inpcb *)so->so_pcb;
807 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
808 return (ECONNRESET); /* I made the same as TCP since we are
812 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
815 switch (addr->sa_family) {
818 if (addr->sa_len != sizeof(struct sockaddr_in)) {
819 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
826 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
827 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
833 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
837 vrf_id = inp->def_vrf_id;
838 SCTP_ASOC_CREATE_LOCK(inp);
840 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
841 SCTP_PCB_FLAGS_UNBOUND) {
842 /* Bind a ephemeral port */
843 SCTP_INP_RUNLOCK(inp);
844 error = sctp6_bind(so, NULL, p);
846 SCTP_ASOC_CREATE_UNLOCK(inp);
852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
853 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
854 /* We are already connected AND the TCP model */
855 SCTP_INP_RUNLOCK(inp);
856 SCTP_ASOC_CREATE_UNLOCK(inp);
857 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
861 sin6 = (struct sockaddr_in6 *)addr;
862 if (SCTP_IPV6_V6ONLY(inp6)) {
864 * if IPV6_V6ONLY flag, ignore connections destined to a v4
865 * addr or v4-mapped addr
867 if (addr->sa_family == AF_INET) {
868 SCTP_INP_RUNLOCK(inp);
869 SCTP_ASOC_CREATE_UNLOCK(inp);
870 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
873 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
874 SCTP_INP_RUNLOCK(inp);
875 SCTP_ASOC_CREATE_UNLOCK(inp);
876 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
880 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
881 /* convert v4-mapped into v4 addr */
882 in6_sin6_2_sin(&store.sin, sin6);
886 /* Now do we connect? */
887 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
888 stcb = LIST_FIRST(&inp->sctp_asoc_list);
892 SCTP_INP_RUNLOCK(inp);
894 SCTP_INP_RUNLOCK(inp);
896 SCTP_INP_INCR_REF(inp);
897 SCTP_INP_WUNLOCK(inp);
898 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
901 SCTP_INP_DECR_REF(inp);
902 SCTP_INP_WUNLOCK(inp);
907 /* Already have or am bring up an association */
908 SCTP_ASOC_CREATE_UNLOCK(inp);
909 SCTP_TCB_UNLOCK(stcb);
910 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
913 /* We are GOOD to go */
914 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
915 inp->sctp_ep.pre_open_stream_count,
916 inp->sctp_ep.port, p);
917 SCTP_ASOC_CREATE_UNLOCK(inp);
922 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
923 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
924 /* Set the connected flag so we can queue data */
927 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
928 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
930 /* initialize authentication parameters for the assoc */
931 sctp_initialize_auth_params(inp, stcb);
933 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
934 SCTP_TCB_UNLOCK(stcb);
939 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
941 struct sockaddr_in6 *sin6;
942 struct sctp_inpcb *inp;
944 struct sctp_ifa *sctp_ifa;
949 * Do the malloc first in case it blocks.
951 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
954 sin6->sin6_family = AF_INET6;
955 sin6->sin6_len = sizeof(*sin6);
957 inp = (struct sctp_inpcb *)so->so_pcb;
959 SCTP_FREE_SONAME(sin6);
960 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
964 sin6->sin6_port = inp->sctp_lport;
965 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
966 /* For the bound all case you get back 0 */
967 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
968 struct sctp_tcb *stcb;
969 struct sockaddr_in6 *sin_a6;
970 struct sctp_nets *net;
973 stcb = LIST_FIRST(&inp->sctp_asoc_list);
975 SCTP_INP_RUNLOCK(inp);
976 SCTP_FREE_SONAME(sin6);
977 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
982 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
983 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
985 /* this will make coverity happy */
988 if (sin_a6->sin6_family == AF_INET6) {
993 if ((!fnd) || (sin_a6 == NULL)) {
995 SCTP_INP_RUNLOCK(inp);
996 SCTP_FREE_SONAME(sin6);
997 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1000 vrf_id = inp->def_vrf_id;
1001 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id);
1003 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
1006 /* For the bound all case you get back 0 */
1007 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
1010 /* Take the first IPv6 address in the list */
1011 struct sctp_laddr *laddr;
1014 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1015 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
1016 struct sockaddr_in6 *sin_a;
1018 sin_a = &laddr->ifa->address.sin6;
1019 sin6->sin6_addr = sin_a->sin6_addr;
1025 SCTP_FREE_SONAME(sin6);
1026 SCTP_INP_RUNLOCK(inp);
1027 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1031 SCTP_INP_RUNLOCK(inp);
1032 /* Scoping things for v6 */
1033 if ((error = sa6_recoverscope(sin6)) != 0) {
1034 SCTP_FREE_SONAME(sin6);
1037 (*addr) = (struct sockaddr *)sin6;
1042 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1044 struct sockaddr_in6 *sin6;
1046 struct sockaddr_in6 *sin_a6;
1047 struct sctp_inpcb *inp;
1048 struct sctp_tcb *stcb;
1049 struct sctp_nets *net;
1052 /* Do the malloc first in case it blocks. */
1053 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1056 sin6->sin6_family = AF_INET6;
1057 sin6->sin6_len = sizeof(*sin6);
1059 inp = (struct sctp_inpcb *)so->so_pcb;
1060 if ((inp == NULL) ||
1061 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
1062 /* UDP type and listeners will drop out here */
1063 SCTP_FREE_SONAME(sin6);
1064 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
1067 SCTP_INP_RLOCK(inp);
1068 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1070 SCTP_TCB_LOCK(stcb);
1072 SCTP_INP_RUNLOCK(inp);
1074 SCTP_FREE_SONAME(sin6);
1075 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1076 return (ECONNRESET);
1079 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1080 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1081 if (sin_a6->sin6_family == AF_INET6) {
1083 sin6->sin6_port = stcb->rport;
1084 sin6->sin6_addr = sin_a6->sin6_addr;
1088 SCTP_TCB_UNLOCK(stcb);
1090 /* No IPv4 address */
1091 SCTP_FREE_SONAME(sin6);
1092 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1095 if ((error = sa6_recoverscope(sin6)) != 0) {
1096 SCTP_FREE_SONAME(sin6);
1097 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error);
1100 *addr = (struct sockaddr *)sin6;
1105 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1107 struct in6pcb *inp6 = sotoin6pcb(so);
1111 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1115 /* allow v6 addresses precedence */
1116 error = sctp6_getaddr(so, nam);
1119 struct sockaddr_in6 *sin6;
1121 /* try v4 next if v6 failed */
1122 error = sctp_ingetaddr(so, nam);
1126 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1128 SCTP_FREE_SONAME(*nam);
1131 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1132 SCTP_FREE_SONAME(*nam);
1133 *nam = (struct sockaddr *)sin6;
1141 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1143 struct in6pcb *inp6 = sotoin6pcb(so);
1147 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1151 /* allow v6 addresses precedence */
1152 error = sctp6_peeraddr(so, nam);
1155 struct sockaddr_in6 *sin6;
1157 /* try v4 next if v6 failed */
1158 error = sctp_peeraddr(so, nam);
1162 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1164 SCTP_FREE_SONAME(*nam);
1167 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1168 SCTP_FREE_SONAME(*nam);
1169 *nam = (struct sockaddr *)sin6;
1175 struct pr_usrreqs sctp6_usrreqs = {
1176 .pru_abort = sctp6_abort,
1177 .pru_accept = sctp_accept,
1178 .pru_attach = sctp6_attach,
1179 .pru_bind = sctp6_bind,
1180 .pru_connect = sctp6_connect,
1181 .pru_control = in6_control,
1182 .pru_close = sctp6_close,
1183 .pru_detach = sctp6_close,
1184 .pru_sopoll = sopoll_generic,
1185 .pru_flush = sctp_flush,
1186 .pru_disconnect = sctp6_disconnect,
1187 .pru_listen = sctp_listen,
1188 .pru_peeraddr = sctp6_getpeeraddr,
1189 .pru_send = sctp6_send,
1190 .pru_shutdown = sctp_shutdown,
1191 .pru_sockaddr = sctp6_in6getaddr,
1192 .pru_sosend = sctp_sosend,
1193 .pru_soreceive = sctp_soreceive