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) == 0) {
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)) {
272 if ((unsigned)cmd >= PRC_NCMDS) {
275 if (PRC_IS_REDIRECT(cmd)) {
277 } else if (inet6ctlerrmap[cmd] == 0) {
280 /* If the parameter is from icmp6, decode it. */
282 ip6cp = (struct ip6ctlparam *)d;
284 ip6cp = (struct ip6ctlparam *)NULL;
289 * XXX: We assume that when IPV6 is non NULL, M and OFF are
292 if (ip6cp->ip6c_m == NULL) {
296 * Check if we can safely examine the ports and the
297 * verification tag of the SCTP common header.
299 if (ip6cp->ip6c_m->m_pkthdr.len <
300 (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) {
303 /* Copy out the port numbers and the verification tag. */
304 memset(&sh, 0, sizeof(sh));
305 m_copydata(ip6cp->ip6c_m,
307 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
309 memset(&src, 0, sizeof(struct sockaddr_in6));
310 src.sin6_family = AF_INET6;
311 src.sin6_len = sizeof(struct sockaddr_in6);
312 src.sin6_port = sh.src_port;
313 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
314 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
317 memset(&dst, 0, sizeof(struct sockaddr_in6));
318 dst.sin6_family = AF_INET6;
319 dst.sin6_len = sizeof(struct sockaddr_in6);
320 dst.sin6_port = sh.dest_port;
321 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
322 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
327 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
328 (struct sockaddr *)&src,
329 &inp, &net, 1, SCTP_DEFAULT_VRFID);
330 if ((stcb != NULL) &&
333 /* Check the verification tag */
334 if (ntohl(sh.v_tag) != 0) {
336 * This must be the verification tag used
337 * for sending out packets. We don't
338 * consider packets reflecting the
341 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
342 SCTP_TCB_UNLOCK(stcb);
346 if (ip6cp->ip6c_m->m_pkthdr.len >=
347 ip6cp->ip6c_off + sizeof(struct sctphdr) +
348 sizeof(struct sctp_chunkhdr) +
349 offsetof(struct sctp_init, a_rwnd)) {
351 * In this case we can check if we
352 * got an INIT chunk and if the
353 * initiate tag matches.
355 uint32_t initiate_tag;
358 m_copydata(ip6cp->ip6c_m,
360 sizeof(struct sctphdr),
362 (caddr_t)&chunk_type);
363 m_copydata(ip6cp->ip6c_m,
365 sizeof(struct sctphdr) +
366 sizeof(struct sctp_chunkhdr),
368 (caddr_t)&initiate_tag);
369 if ((chunk_type != SCTP_INITIATION) ||
370 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
371 SCTP_TCB_UNLOCK(stcb);
375 SCTP_TCB_UNLOCK(stcb);
379 sctp6_notify(inp, stcb, net,
380 ip6cp->ip6c_icmp6->icmp6_type,
381 ip6cp->ip6c_icmp6->icmp6_code,
382 ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
384 if ((stcb == NULL) && (inp != NULL)) {
385 /* reduce inp's ref-count */
387 SCTP_INP_DECR_REF(inp);
388 SCTP_INP_WUNLOCK(inp);
391 SCTP_TCB_UNLOCK(stcb);
398 * this routine can probably be collasped into the one in sctp_userreq.c
399 * since they do the same thing and now we lookup with a sockaddr
402 sctp6_getcred(SYSCTL_HANDLER_ARGS)
405 struct sockaddr_in6 addrs[2];
406 struct sctp_inpcb *inp;
407 struct sctp_nets *net;
408 struct sctp_tcb *stcb;
412 vrf_id = SCTP_DEFAULT_VRFID;
414 error = priv_check(req->td, PRIV_NETINET_GETCRED);
418 if (req->newlen != sizeof(addrs)) {
419 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
422 if (req->oldlen != sizeof(struct ucred)) {
423 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
426 error = SYSCTL_IN(req, addrs, sizeof(addrs));
430 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
432 &inp, &net, 1, vrf_id);
433 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
434 if ((inp != NULL) && (stcb == NULL)) {
435 /* reduce ref-count */
437 SCTP_INP_DECR_REF(inp);
440 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
444 SCTP_TCB_UNLOCK(stcb);
446 * We use the write lock here, only since in the error leg we need
447 * it. If we used RLOCK, then we would have to
448 * wlock/decr/unlock/rlock. Which in theory could create a hole.
449 * Better to use higher wlock.
453 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
455 SCTP_INP_WUNLOCK(inp);
458 cru2x(inp->sctp_socket->so_cred, &xuc);
459 SCTP_INP_WUNLOCK(inp);
460 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
465 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
467 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
470 /* This is the same as the sctp_abort() could be made common */
472 sctp6_abort(struct socket *so)
474 struct sctp_inpcb *inp;
477 inp = (struct sctp_inpcb *)so->so_pcb;
479 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
483 flags = inp->sctp_flags;
484 #ifdef SCTP_LOG_CLOSING
485 sctp_log_closing(inp, NULL, 17);
487 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
488 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
489 #ifdef SCTP_LOG_CLOSING
490 sctp_log_closing(inp, NULL, 16);
492 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
493 SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
495 SCTP_SB_CLEAR(so->so_snd);
497 * same for the rcv ones, they are only here for the
500 SCTP_SB_CLEAR(so->so_rcv);
501 /* Now null out the reference, we are completely detached. */
505 flags = inp->sctp_flags;
506 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
507 goto sctp_must_try_again;
514 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
518 struct sctp_inpcb *inp;
519 uint32_t vrf_id = SCTP_DEFAULT_VRFID;
521 inp = (struct sctp_inpcb *)so->so_pcb;
523 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
526 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
527 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
531 error = sctp_inpcb_alloc(so, vrf_id);
534 inp = (struct sctp_inpcb *)so->so_pcb;
536 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */
537 inp6 = (struct in6pcb *)inp;
539 inp6->inp_vflag |= INP_IPV6;
540 inp6->in6p_hops = -1; /* use kernel default */
541 inp6->in6p_cksum = -1; /* just to be sure */
544 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
545 * socket as well, because the socket may be bound to an IPv6
546 * wildcard address, which may match an IPv4-mapped IPv6 address.
548 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
550 SCTP_INP_WUNLOCK(inp);
555 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
557 struct sctp_inpcb *inp;
561 inp = (struct sctp_inpcb *)so->so_pcb;
563 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
567 switch (addr->sa_family) {
570 if (addr->sa_len != sizeof(struct sockaddr_in)) {
571 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
578 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
579 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
585 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
589 inp6 = (struct in6pcb *)inp;
590 inp6->inp_vflag &= ~INP_IPV4;
591 inp6->inp_vflag |= INP_IPV6;
592 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) {
593 switch (addr->sa_family) {
596 /* binding v4 addr to v6 socket, so reset flags */
597 inp6->inp_vflag |= INP_IPV4;
598 inp6->inp_vflag &= ~INP_IPV6;
604 struct sockaddr_in6 *sin6_p;
606 sin6_p = (struct sockaddr_in6 *)addr;
608 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
609 inp6->inp_vflag |= INP_IPV4;
612 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
613 struct sockaddr_in sin;
615 in6_sin6_2_sin(&sin, sin6_p);
616 inp6->inp_vflag |= INP_IPV4;
617 inp6->inp_vflag &= ~INP_IPV6;
618 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
628 } else if (addr != NULL) {
629 struct sockaddr_in6 *sin6_p;
631 /* IPV6_V6ONLY socket */
633 if (addr->sa_family == AF_INET) {
634 /* can't bind v4 addr to v6 only socket! */
635 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
639 sin6_p = (struct sockaddr_in6 *)addr;
641 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
642 /* can't bind v4-mapped addrs either! */
643 /* NOTE: we don't support SIIT */
644 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
648 error = sctp_inpcb_bind(so, addr, NULL, p);
654 sctp6_close(struct socket *so)
659 /* This could be made common with sctp_detach() since they are identical */
663 sctp6_disconnect(struct socket *so)
665 return (sctp_disconnect(so));
670 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
671 struct mbuf *control, struct thread *p);
675 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
676 struct mbuf *control, struct thread *p)
678 struct sctp_inpcb *inp;
682 struct sockaddr_in6 *sin6;
684 /* No SPL needed since sctp_output does this */
686 inp = (struct sctp_inpcb *)so->so_pcb;
689 SCTP_RELEASE_PKT(control);
693 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
696 inp6 = (struct in6pcb *)inp;
698 * For the TCP model we may get a NULL addr, if we are a connected
701 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
708 SCTP_RELEASE_PKT(control);
711 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
712 return (EDESTADDRREQ);
715 sin6 = (struct sockaddr_in6 *)addr;
716 if (SCTP_IPV6_V6ONLY(inp6)) {
718 * if IPV6_V6ONLY flag, we discard datagrams destined to a
719 * v4 addr or v4-mapped addr
721 if (addr->sa_family == AF_INET) {
722 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
725 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
726 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
730 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
731 struct sockaddr_in sin;
733 /* convert v4-mapped into v4 addr and send */
734 in6_sin6_2_sin(&sin, sin6);
735 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
739 /* now what about control */
742 SCTP_PRINTF("huh? control set?\n");
743 SCTP_RELEASE_PKT(inp->control);
746 inp->control = control;
750 SCTP_BUF_NEXT(inp->pkt_last) = m;
753 inp->pkt_last = inp->pkt = m;
756 /* FreeBSD and MacOSX uses a flag passed */
757 ((flags & PRUS_MORETOCOME) == 0)
760 * note with the current version this code will only be used
761 * by OpenBSD, NetBSD and FreeBSD have methods for
762 * re-defining sosend() to use sctp_sosend(). One can
763 * optionaly switch back to this code (by changing back the
764 * defininitions but this is not advisable.
768 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
778 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
782 struct sctp_inpcb *inp;
783 struct sctp_tcb *stcb;
786 struct sockaddr_in6 *sin6;
787 union sctp_sockstore store;
791 inp6 = (struct in6pcb *)so->so_pcb;
793 inp = (struct sctp_inpcb *)so->so_pcb;
795 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
796 return (ECONNRESET); /* I made the same as TCP since we are
800 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
803 switch (addr->sa_family) {
806 if (addr->sa_len != sizeof(struct sockaddr_in)) {
807 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
814 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
815 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
821 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
825 vrf_id = inp->def_vrf_id;
826 SCTP_ASOC_CREATE_LOCK(inp);
828 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
829 SCTP_PCB_FLAGS_UNBOUND) {
830 /* Bind a ephemeral port */
831 SCTP_INP_RUNLOCK(inp);
832 error = sctp6_bind(so, NULL, p);
834 SCTP_ASOC_CREATE_UNLOCK(inp);
840 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
841 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
842 /* We are already connected AND the TCP model */
843 SCTP_INP_RUNLOCK(inp);
844 SCTP_ASOC_CREATE_UNLOCK(inp);
845 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
849 sin6 = (struct sockaddr_in6 *)addr;
850 if (SCTP_IPV6_V6ONLY(inp6)) {
852 * if IPV6_V6ONLY flag, ignore connections destined to a v4
853 * addr or v4-mapped addr
855 if (addr->sa_family == AF_INET) {
856 SCTP_INP_RUNLOCK(inp);
857 SCTP_ASOC_CREATE_UNLOCK(inp);
858 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
861 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
862 SCTP_INP_RUNLOCK(inp);
863 SCTP_ASOC_CREATE_UNLOCK(inp);
864 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
868 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
869 /* convert v4-mapped into v4 addr */
870 in6_sin6_2_sin(&store.sin, sin6);
874 /* Now do we connect? */
875 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
876 stcb = LIST_FIRST(&inp->sctp_asoc_list);
880 SCTP_INP_RUNLOCK(inp);
882 SCTP_INP_RUNLOCK(inp);
884 SCTP_INP_INCR_REF(inp);
885 SCTP_INP_WUNLOCK(inp);
886 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
889 SCTP_INP_DECR_REF(inp);
890 SCTP_INP_WUNLOCK(inp);
895 /* Already have or am bring up an association */
896 SCTP_ASOC_CREATE_UNLOCK(inp);
897 SCTP_TCB_UNLOCK(stcb);
898 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
901 /* We are GOOD to go */
902 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
903 inp->sctp_ep.pre_open_stream_count,
904 inp->sctp_ep.port, p);
905 SCTP_ASOC_CREATE_UNLOCK(inp);
910 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
911 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
912 /* Set the connected flag so we can queue data */
915 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT;
916 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
918 /* initialize authentication parameters for the assoc */
919 sctp_initialize_auth_params(inp, stcb);
921 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
922 SCTP_TCB_UNLOCK(stcb);
927 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
929 struct sockaddr_in6 *sin6;
930 struct sctp_inpcb *inp;
932 struct sctp_ifa *sctp_ifa;
937 * Do the malloc first in case it blocks.
939 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
942 sin6->sin6_family = AF_INET6;
943 sin6->sin6_len = sizeof(*sin6);
945 inp = (struct sctp_inpcb *)so->so_pcb;
947 SCTP_FREE_SONAME(sin6);
948 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
952 sin6->sin6_port = inp->sctp_lport;
953 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
954 /* For the bound all case you get back 0 */
955 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
956 struct sctp_tcb *stcb;
957 struct sockaddr_in6 *sin_a6;
958 struct sctp_nets *net;
961 stcb = LIST_FIRST(&inp->sctp_asoc_list);
963 SCTP_INP_RUNLOCK(inp);
964 SCTP_FREE_SONAME(sin6);
965 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
970 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
971 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
973 /* this will make coverity happy */
976 if (sin_a6->sin6_family == AF_INET6) {
981 if ((!fnd) || (sin_a6 == NULL)) {
983 SCTP_INP_RUNLOCK(inp);
984 SCTP_FREE_SONAME(sin6);
985 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
988 vrf_id = inp->def_vrf_id;
989 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id);
991 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
994 /* For the bound all case you get back 0 */
995 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
998 /* Take the first IPv6 address in the list */
999 struct sctp_laddr *laddr;
1002 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1003 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
1004 struct sockaddr_in6 *sin_a;
1006 sin_a = &laddr->ifa->address.sin6;
1007 sin6->sin6_addr = sin_a->sin6_addr;
1013 SCTP_FREE_SONAME(sin6);
1014 SCTP_INP_RUNLOCK(inp);
1015 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1019 SCTP_INP_RUNLOCK(inp);
1020 /* Scoping things for v6 */
1021 if ((error = sa6_recoverscope(sin6)) != 0) {
1022 SCTP_FREE_SONAME(sin6);
1025 (*addr) = (struct sockaddr *)sin6;
1030 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1032 struct sockaddr_in6 *sin6;
1034 struct sockaddr_in6 *sin_a6;
1035 struct sctp_inpcb *inp;
1036 struct sctp_tcb *stcb;
1037 struct sctp_nets *net;
1040 /* Do the malloc first in case it blocks. */
1041 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1044 sin6->sin6_family = AF_INET6;
1045 sin6->sin6_len = sizeof(*sin6);
1047 inp = (struct sctp_inpcb *)so->so_pcb;
1048 if ((inp == NULL) ||
1049 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
1050 /* UDP type and listeners will drop out here */
1051 SCTP_FREE_SONAME(sin6);
1052 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
1055 SCTP_INP_RLOCK(inp);
1056 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1058 SCTP_TCB_LOCK(stcb);
1060 SCTP_INP_RUNLOCK(inp);
1062 SCTP_FREE_SONAME(sin6);
1063 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1064 return (ECONNRESET);
1067 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1068 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1069 if (sin_a6->sin6_family == AF_INET6) {
1071 sin6->sin6_port = stcb->rport;
1072 sin6->sin6_addr = sin_a6->sin6_addr;
1076 SCTP_TCB_UNLOCK(stcb);
1078 /* No IPv4 address */
1079 SCTP_FREE_SONAME(sin6);
1080 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1083 if ((error = sa6_recoverscope(sin6)) != 0) {
1084 SCTP_FREE_SONAME(sin6);
1085 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error);
1088 *addr = (struct sockaddr *)sin6;
1093 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1095 struct in6pcb *inp6 = sotoin6pcb(so);
1099 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1102 /* allow v6 addresses precedence */
1103 error = sctp6_getaddr(so, nam);
1106 struct sockaddr_in6 *sin6;
1108 /* try v4 next if v6 failed */
1109 error = sctp_ingetaddr(so, nam);
1113 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1115 SCTP_FREE_SONAME(*nam);
1118 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1119 SCTP_FREE_SONAME(*nam);
1120 *nam = (struct sockaddr *)sin6;
1128 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1130 struct in6pcb *inp6 = sotoin6pcb(so);
1134 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1137 /* allow v6 addresses precedence */
1138 error = sctp6_peeraddr(so, nam);
1141 struct sockaddr_in6 *sin6;
1143 /* try v4 next if v6 failed */
1144 error = sctp_peeraddr(so, nam);
1148 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1150 SCTP_FREE_SONAME(*nam);
1153 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1154 SCTP_FREE_SONAME(*nam);
1155 *nam = (struct sockaddr *)sin6;
1161 struct pr_usrreqs sctp6_usrreqs = {
1162 .pru_abort = sctp6_abort,
1163 .pru_accept = sctp_accept,
1164 .pru_attach = sctp6_attach,
1165 .pru_bind = sctp6_bind,
1166 .pru_connect = sctp6_connect,
1167 .pru_control = in6_control,
1168 .pru_close = sctp6_close,
1169 .pru_detach = sctp6_close,
1170 .pru_sopoll = sopoll_generic,
1171 .pru_flush = sctp_flush,
1172 .pru_disconnect = sctp6_disconnect,
1173 .pru_listen = sctp_listen,
1174 .pru_peeraddr = sctp6_getpeeraddr,
1175 .pru_send = sctp6_send,
1176 .pru_shutdown = sctp_shutdown,
1177 .pru_sockaddr = sctp6_in6getaddr,
1178 .pru_sosend = sctp_sosend,
1179 .pru_soreceive = sctp_soreceive