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>
59 #include <netipsec/ipsec.h>
60 #include <netipsec/ipsec6.h>
63 extern struct protosw inetsw[];
66 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port)
72 struct sockaddr_in6 src, dst;
75 struct sctp_chunkhdr *ch;
78 #if !defined(SCTP_WITH_NO_CSUM)
87 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) {
88 SCTP_RELEASE_PKT(*i_pak);
89 return (IPPROTO_DONE);
91 m = SCTP_HEADER_TO_CHAIN(*i_pak);
92 #ifdef SCTP_MBUF_LOGGING
93 /* Log in any input mbufs */
94 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
95 sctp_log_mbc(m, SCTP_MBUF_INPUT);
98 #ifdef SCTP_PACKET_LOGGING
99 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
103 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
104 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
106 if_name(m->m_pkthdr.rcvif),
107 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
108 mflowid = m->m_pkthdr.flowid;
109 mflowtype = M_HASHTYPE_GET(m);
110 fibnum = M_GETFIB(m);
111 SCTP_STAT_INCR(sctps_recvpackets);
112 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
113 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
114 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
115 ip6 = mtod(m, struct ip6_hdr *);
116 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen,
117 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)));
119 SCTP_STAT_INCR(sctps_hdrops);
120 return (IPPROTO_DONE);
122 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
123 offset -= sizeof(struct sctp_chunkhdr);
124 memset(&src, 0, sizeof(struct sockaddr_in6));
125 src.sin6_family = AF_INET6;
126 src.sin6_len = sizeof(struct sockaddr_in6);
127 src.sin6_port = sh->src_port;
128 src.sin6_addr = ip6->ip6_src;
129 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
132 memset(&dst, 0, sizeof(struct sockaddr_in6));
133 dst.sin6_family = AF_INET6;
134 dst.sin6_len = sizeof(struct sockaddr_in6);
135 dst.sin6_port = sh->dest_port;
136 dst.sin6_addr = ip6->ip6_dst;
137 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
140 length = ntohs(ip6->ip6_plen) + iphlen;
141 /* Validate mbuf chain length with IP payload length. */
142 if (SCTP_HEADER_LEN(m) != length) {
143 SCTPDBG(SCTP_DEBUG_INPUT1,
144 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
145 SCTP_STAT_INCR(sctps_hdrops);
148 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
151 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
152 #if defined(SCTP_WITH_NO_CSUM)
153 SCTP_STAT_INCR(sctps_recvnocrc);
155 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
156 SCTP_STAT_INCR(sctps_recvhwcrc);
159 SCTP_STAT_INCR(sctps_recvswcrc);
163 sctp_common_input_processing(&m, iphlen, offset, length,
164 (struct sockaddr *)&src,
165 (struct sockaddr *)&dst,
167 #if !defined(SCTP_WITH_NO_CSUM)
171 mflowtype, mflowid, fibnum,
177 return (IPPROTO_DONE);
182 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
184 return (sctp6_input_with_port(i_pak, offp, 0));
188 sctp6_notify(struct sctp_inpcb *inp,
189 struct sctp_tcb *stcb,
190 struct sctp_nets *net,
195 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
201 switch (icmp6_type) {
202 case ICMP6_DST_UNREACH:
203 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) ||
204 (icmp6_code == ICMP6_DST_UNREACH_ADMIN) ||
205 (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) ||
206 (icmp6_code == ICMP6_DST_UNREACH_ADDR)) {
207 /* Mark the net unreachable. */
208 if (net->dest_state & SCTP_ADDR_REACHABLE) {
209 /* Ok that destination is not reachable */
210 net->dest_state &= ~SCTP_ADDR_REACHABLE;
211 net->dest_state &= ~SCTP_ADDR_PF;
212 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
213 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
216 SCTP_TCB_UNLOCK(stcb);
218 case ICMP6_PARAM_PROB:
219 /* Treat it like an ABORT. */
220 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) {
221 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED);
222 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
223 so = SCTP_INP_SO(inp);
224 atomic_add_int(&stcb->asoc.refcnt, 1);
225 SCTP_TCB_UNLOCK(stcb);
226 SCTP_SOCKET_LOCK(so, 1);
228 atomic_subtract_int(&stcb->asoc.refcnt, 1);
230 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
231 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2);
232 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
233 SCTP_SOCKET_UNLOCK(so, 1);
236 SCTP_TCB_UNLOCK(stcb);
239 case ICMP6_PACKET_TOO_BIG:
240 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) {
242 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
243 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1);
248 /* Update the path MTU. */
249 if (net->mtu > next_mtu) {
252 net->mtu -= sizeof(struct udphdr);
255 /* Update the association MTU */
256 if (stcb->asoc.smallest_mtu > next_mtu) {
257 sctp_pathmtu_adjustment(stcb, next_mtu);
259 /* Finally, start the PMTU timer if it was running before. */
261 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
263 SCTP_TCB_UNLOCK(stcb);
266 SCTP_TCB_UNLOCK(stcb);
272 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
274 struct ip6ctlparam *ip6cp;
275 struct sctp_inpcb *inp;
276 struct sctp_tcb *stcb;
277 struct sctp_nets *net;
279 struct sockaddr_in6 src, dst;
281 if (pktdst->sa_family != AF_INET6 ||
282 pktdst->sa_len != sizeof(struct sockaddr_in6)) {
285 if ((unsigned)cmd >= PRC_NCMDS) {
288 if (PRC_IS_REDIRECT(cmd)) {
290 } else if (inet6ctlerrmap[cmd] == 0) {
293 /* If the parameter is from icmp6, decode it. */
295 ip6cp = (struct ip6ctlparam *)d;
297 ip6cp = (struct ip6ctlparam *)NULL;
302 * XXX: We assume that when IPV6 is non NULL, M and OFF are
305 if (ip6cp->ip6c_m == NULL) {
309 * Check if we can safely examine the ports and the
310 * verification tag of the SCTP common header.
312 if (ip6cp->ip6c_m->m_pkthdr.len <
313 ip6cp->ip6c_off + offsetof(struct sctphdr, checksum)) {
316 /* Copy out the port numbers and the verification tag. */
317 bzero(&sh, sizeof(sh));
318 m_copydata(ip6cp->ip6c_m,
320 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
322 memset(&src, 0, sizeof(struct sockaddr_in6));
323 src.sin6_family = AF_INET6;
324 src.sin6_len = sizeof(struct sockaddr_in6);
325 src.sin6_port = sh.src_port;
326 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
327 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
330 memset(&dst, 0, sizeof(struct sockaddr_in6));
331 dst.sin6_family = AF_INET6;
332 dst.sin6_len = sizeof(struct sockaddr_in6);
333 dst.sin6_port = sh.dest_port;
334 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
335 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
340 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
341 (struct sockaddr *)&src,
342 &inp, &net, 1, SCTP_DEFAULT_VRFID);
343 if ((stcb != NULL) &&
346 (inp->sctp_socket != NULL)) {
347 /* Check the verification tag */
348 if (ntohl(sh.v_tag) != 0) {
350 * This must be the verification tag used
351 * for sending out packets. We don't
352 * consider packets reflecting the
355 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
356 SCTP_TCB_UNLOCK(stcb);
360 if (ip6cp->ip6c_m->m_pkthdr.len >=
361 ip6cp->ip6c_off + sizeof(struct sctphdr) +
362 sizeof(struct sctp_chunkhdr) +
363 offsetof(struct sctp_init, a_rwnd)) {
365 * In this case we can check if we
366 * got an INIT chunk and if the
367 * initiate tag matches.
369 uint32_t initiate_tag;
372 m_copydata(ip6cp->ip6c_m,
374 sizeof(struct sctphdr),
376 (caddr_t)&chunk_type);
377 m_copydata(ip6cp->ip6c_m,
379 sizeof(struct sctphdr) +
380 sizeof(struct sctp_chunkhdr),
382 (caddr_t)&initiate_tag);
383 if ((chunk_type != SCTP_INITIATION) ||
384 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
385 SCTP_TCB_UNLOCK(stcb);
389 SCTP_TCB_UNLOCK(stcb);
393 sctp6_notify(inp, stcb, net,
394 ip6cp->ip6c_icmp6->icmp6_type,
395 ip6cp->ip6c_icmp6->icmp6_code,
396 (uint16_t) ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
398 if ((stcb == NULL) && (inp != NULL)) {
399 /* reduce inp's ref-count */
401 SCTP_INP_DECR_REF(inp);
402 SCTP_INP_WUNLOCK(inp);
405 SCTP_TCB_UNLOCK(stcb);
412 * this routine can probably be collasped into the one in sctp_userreq.c
413 * since they do the same thing and now we lookup with a sockaddr
416 sctp6_getcred(SYSCTL_HANDLER_ARGS)
419 struct sockaddr_in6 addrs[2];
420 struct sctp_inpcb *inp;
421 struct sctp_nets *net;
422 struct sctp_tcb *stcb;
426 vrf_id = SCTP_DEFAULT_VRFID;
428 error = priv_check(req->td, PRIV_NETINET_GETCRED);
432 if (req->newlen != sizeof(addrs)) {
433 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
436 if (req->oldlen != sizeof(struct ucred)) {
437 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
440 error = SYSCTL_IN(req, addrs, sizeof(addrs));
444 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
446 &inp, &net, 1, vrf_id);
447 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
448 if ((inp != NULL) && (stcb == NULL)) {
449 /* reduce ref-count */
451 SCTP_INP_DECR_REF(inp);
454 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
458 SCTP_TCB_UNLOCK(stcb);
460 * We use the write lock here, only since in the error leg we need
461 * it. If we used RLOCK, then we would have to
462 * wlock/decr/unlock/rlock. Which in theory could create a hole.
463 * Better to use higher wlock.
467 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
469 SCTP_INP_WUNLOCK(inp);
472 cru2x(inp->sctp_socket->so_cred, &xuc);
473 SCTP_INP_WUNLOCK(inp);
474 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
479 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
481 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
484 /* This is the same as the sctp_abort() could be made common */
486 sctp6_abort(struct socket *so)
488 struct sctp_inpcb *inp;
491 inp = (struct sctp_inpcb *)so->so_pcb;
493 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
497 flags = inp->sctp_flags;
498 #ifdef SCTP_LOG_CLOSING
499 sctp_log_closing(inp, NULL, 17);
501 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
502 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
503 #ifdef SCTP_LOG_CLOSING
504 sctp_log_closing(inp, NULL, 16);
506 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
507 SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
509 SCTP_SB_CLEAR(so->so_snd);
511 * same for the rcv ones, they are only here for the
514 SCTP_SB_CLEAR(so->so_rcv);
515 /* Now null out the reference, we are completely detached. */
519 flags = inp->sctp_flags;
520 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
521 goto sctp_must_try_again;
528 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
532 struct sctp_inpcb *inp;
533 uint32_t vrf_id = SCTP_DEFAULT_VRFID;
535 inp = (struct sctp_inpcb *)so->so_pcb;
537 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
540 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
541 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
545 error = sctp_inpcb_alloc(so, vrf_id);
548 inp = (struct sctp_inpcb *)so->so_pcb;
550 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */
551 inp6 = (struct in6pcb *)inp;
553 inp6->inp_vflag |= INP_IPV6;
554 inp6->in6p_hops = -1; /* use kernel default */
555 inp6->in6p_cksum = -1; /* just to be sure */
558 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
559 * socket as well, because the socket may be bound to an IPv6
560 * wildcard address, which may match an IPv4-mapped IPv6 address.
562 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
565 * Hmm what about the IPSEC stuff that is missing here but in
568 SCTP_INP_WUNLOCK(inp);
573 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
575 struct sctp_inpcb *inp;
579 inp = (struct sctp_inpcb *)so->so_pcb;
581 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
585 switch (addr->sa_family) {
588 if (addr->sa_len != sizeof(struct sockaddr_in)) {
589 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
596 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
597 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
603 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
607 inp6 = (struct in6pcb *)inp;
608 inp6->inp_vflag &= ~INP_IPV4;
609 inp6->inp_vflag |= INP_IPV6;
610 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) {
611 switch (addr->sa_family) {
614 /* binding v4 addr to v6 socket, so reset flags */
615 inp6->inp_vflag |= INP_IPV4;
616 inp6->inp_vflag &= ~INP_IPV6;
622 struct sockaddr_in6 *sin6_p;
624 sin6_p = (struct sockaddr_in6 *)addr;
626 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
627 inp6->inp_vflag |= INP_IPV4;
630 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
631 struct sockaddr_in sin;
633 in6_sin6_2_sin(&sin, sin6_p);
634 inp6->inp_vflag |= INP_IPV4;
635 inp6->inp_vflag &= ~INP_IPV6;
636 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
646 } else if (addr != NULL) {
647 struct sockaddr_in6 *sin6_p;
649 /* IPV6_V6ONLY socket */
651 if (addr->sa_family == AF_INET) {
652 /* can't bind v4 addr to v6 only socket! */
653 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
657 sin6_p = (struct sockaddr_in6 *)addr;
659 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
660 /* can't bind v4-mapped addrs either! */
661 /* NOTE: we don't support SIIT */
662 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
666 error = sctp_inpcb_bind(so, addr, NULL, p);
672 sctp6_close(struct socket *so)
677 /* This could be made common with sctp_detach() since they are identical */
681 sctp6_disconnect(struct socket *so)
683 return (sctp_disconnect(so));
688 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
689 struct mbuf *control, struct thread *p);
693 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
694 struct mbuf *control, struct thread *p)
696 struct sctp_inpcb *inp;
700 struct sockaddr_in6 *sin6;
703 /* No SPL needed since sctp_output does this */
705 inp = (struct sctp_inpcb *)so->so_pcb;
708 SCTP_RELEASE_PKT(control);
712 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
715 inp6 = (struct in6pcb *)inp;
717 * For the TCP model we may get a NULL addr, if we are a connected
720 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
727 SCTP_RELEASE_PKT(control);
730 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
731 return (EDESTADDRREQ);
734 sin6 = (struct sockaddr_in6 *)addr;
735 if (SCTP_IPV6_V6ONLY(inp6)) {
737 * if IPV6_V6ONLY flag, we discard datagrams destined to a
738 * v4 addr or v4-mapped addr
740 if (addr->sa_family == AF_INET) {
741 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
744 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
745 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
749 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
750 struct sockaddr_in sin;
752 /* convert v4-mapped into v4 addr and send */
753 in6_sin6_2_sin(&sin, sin6);
754 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
758 /* now what about control */
761 SCTP_PRINTF("huh? control set?\n");
762 SCTP_RELEASE_PKT(inp->control);
765 inp->control = control;
769 SCTP_BUF_NEXT(inp->pkt_last) = m;
772 inp->pkt_last = inp->pkt = m;
775 /* FreeBSD and MacOSX uses a flag passed */
776 ((flags & PRUS_MORETOCOME) == 0)
779 * note with the current version this code will only be used
780 * by OpenBSD, NetBSD and FreeBSD have methods for
781 * re-defining sosend() to use sctp_sosend(). One can
782 * optionaly switch back to this code (by changing back the
783 * defininitions but this is not advisable.
787 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
797 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
801 struct sctp_inpcb *inp;
802 struct sctp_tcb *stcb;
806 struct sockaddr_in6 *sin6;
807 union sctp_sockstore store;
812 inp6 = (struct in6pcb *)so->so_pcb;
814 inp = (struct sctp_inpcb *)so->so_pcb;
816 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
817 return (ECONNRESET); /* I made the same as TCP since we are
821 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
824 switch (addr->sa_family) {
827 if (addr->sa_len != sizeof(struct sockaddr_in)) {
828 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
835 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
836 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
842 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
846 vrf_id = inp->def_vrf_id;
847 SCTP_ASOC_CREATE_LOCK(inp);
849 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
850 SCTP_PCB_FLAGS_UNBOUND) {
851 /* Bind a ephemeral port */
852 SCTP_INP_RUNLOCK(inp);
853 error = sctp6_bind(so, NULL, p);
855 SCTP_ASOC_CREATE_UNLOCK(inp);
861 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
862 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
863 /* We are already connected AND the TCP model */
864 SCTP_INP_RUNLOCK(inp);
865 SCTP_ASOC_CREATE_UNLOCK(inp);
866 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
870 sin6 = (struct sockaddr_in6 *)addr;
871 if (SCTP_IPV6_V6ONLY(inp6)) {
873 * if IPV6_V6ONLY flag, ignore connections destined to a v4
874 * addr or v4-mapped addr
876 if (addr->sa_family == AF_INET) {
877 SCTP_INP_RUNLOCK(inp);
878 SCTP_ASOC_CREATE_UNLOCK(inp);
879 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
882 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
883 SCTP_INP_RUNLOCK(inp);
884 SCTP_ASOC_CREATE_UNLOCK(inp);
885 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
889 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
890 /* convert v4-mapped into v4 addr */
891 in6_sin6_2_sin(&store.sin, sin6);
895 /* Now do we connect? */
896 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
897 stcb = LIST_FIRST(&inp->sctp_asoc_list);
899 SCTP_TCB_UNLOCK(stcb);
901 SCTP_INP_RUNLOCK(inp);
903 SCTP_INP_RUNLOCK(inp);
905 SCTP_INP_INCR_REF(inp);
906 SCTP_INP_WUNLOCK(inp);
907 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
910 SCTP_INP_DECR_REF(inp);
911 SCTP_INP_WUNLOCK(inp);
916 /* Already have or am bring up an association */
917 SCTP_ASOC_CREATE_UNLOCK(inp);
918 SCTP_TCB_UNLOCK(stcb);
919 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
922 /* We are GOOD to go */
923 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, inp->sctp_ep.pre_open_stream_count, p);
924 SCTP_ASOC_CREATE_UNLOCK(inp);
929 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
930 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
931 /* Set the connected flag so we can queue data */
934 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT;
935 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
937 /* initialize authentication parameters for the assoc */
938 sctp_initialize_auth_params(inp, stcb);
940 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
941 SCTP_TCB_UNLOCK(stcb);
946 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
948 struct sockaddr_in6 *sin6;
949 struct sctp_inpcb *inp;
951 struct sctp_ifa *sctp_ifa;
956 * Do the malloc first in case it blocks.
958 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
961 sin6->sin6_family = AF_INET6;
962 sin6->sin6_len = sizeof(*sin6);
964 inp = (struct sctp_inpcb *)so->so_pcb;
966 SCTP_FREE_SONAME(sin6);
967 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
971 sin6->sin6_port = inp->sctp_lport;
972 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
973 /* For the bound all case you get back 0 */
974 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
975 struct sctp_tcb *stcb;
976 struct sockaddr_in6 *sin_a6;
977 struct sctp_nets *net;
980 stcb = LIST_FIRST(&inp->sctp_asoc_list);
982 SCTP_INP_RUNLOCK(inp);
983 SCTP_FREE_SONAME(sin6);
984 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
989 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
990 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
992 /* this will make coverity happy */
995 if (sin_a6->sin6_family == AF_INET6) {
1000 if ((!fnd) || (sin_a6 == NULL)) {
1002 SCTP_INP_RUNLOCK(inp);
1003 SCTP_FREE_SONAME(sin6);
1004 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1007 vrf_id = inp->def_vrf_id;
1008 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id);
1010 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
1013 /* For the bound all case you get back 0 */
1014 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
1017 /* Take the first IPv6 address in the list */
1018 struct sctp_laddr *laddr;
1021 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1022 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
1023 struct sockaddr_in6 *sin_a;
1025 sin_a = &laddr->ifa->address.sin6;
1026 sin6->sin6_addr = sin_a->sin6_addr;
1032 SCTP_FREE_SONAME(sin6);
1033 SCTP_INP_RUNLOCK(inp);
1034 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1038 SCTP_INP_RUNLOCK(inp);
1039 /* Scoping things for v6 */
1040 if ((error = sa6_recoverscope(sin6)) != 0) {
1041 SCTP_FREE_SONAME(sin6);
1044 (*addr) = (struct sockaddr *)sin6;
1049 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1051 struct sockaddr_in6 *sin6;
1053 struct sockaddr_in6 *sin_a6;
1054 struct sctp_inpcb *inp;
1055 struct sctp_tcb *stcb;
1056 struct sctp_nets *net;
1059 /* Do the malloc first in case it blocks. */
1060 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1063 sin6->sin6_family = AF_INET6;
1064 sin6->sin6_len = sizeof(*sin6);
1066 inp = (struct sctp_inpcb *)so->so_pcb;
1067 if ((inp == NULL) ||
1068 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
1069 /* UDP type and listeners will drop out here */
1070 SCTP_FREE_SONAME(sin6);
1071 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
1074 SCTP_INP_RLOCK(inp);
1075 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1077 SCTP_TCB_LOCK(stcb);
1079 SCTP_INP_RUNLOCK(inp);
1081 SCTP_FREE_SONAME(sin6);
1082 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1083 return (ECONNRESET);
1086 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1087 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1088 if (sin_a6->sin6_family == AF_INET6) {
1090 sin6->sin6_port = stcb->rport;
1091 sin6->sin6_addr = sin_a6->sin6_addr;
1095 SCTP_TCB_UNLOCK(stcb);
1097 /* No IPv4 address */
1098 SCTP_FREE_SONAME(sin6);
1099 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1102 if ((error = sa6_recoverscope(sin6)) != 0) {
1103 SCTP_FREE_SONAME(sin6);
1104 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error);
1107 *addr = (struct sockaddr *)sin6;
1112 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1114 struct in6pcb *inp6 = sotoin6pcb(so);
1118 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1121 /* allow v6 addresses precedence */
1122 error = sctp6_getaddr(so, nam);
1125 struct sockaddr_in6 *sin6;
1127 /* try v4 next if v6 failed */
1128 error = sctp_ingetaddr(so, nam);
1132 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1134 SCTP_FREE_SONAME(*nam);
1137 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1138 SCTP_FREE_SONAME(*nam);
1139 *nam = (struct sockaddr *)sin6;
1147 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1149 struct in6pcb *inp6 = sotoin6pcb(so);
1153 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1156 /* allow v6 addresses precedence */
1157 error = sctp6_peeraddr(so, nam);
1160 struct sockaddr_in6 *sin6;
1162 /* try v4 next if v6 failed */
1163 error = sctp_peeraddr(so, nam);
1167 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1169 SCTP_FREE_SONAME(*nam);
1172 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1173 SCTP_FREE_SONAME(*nam);
1174 *nam = (struct sockaddr *)sin6;
1180 struct pr_usrreqs sctp6_usrreqs = {
1181 .pru_abort = sctp6_abort,
1182 .pru_accept = sctp_accept,
1183 .pru_attach = sctp6_attach,
1184 .pru_bind = sctp6_bind,
1185 .pru_connect = sctp6_connect,
1186 .pru_control = in6_control,
1187 .pru_close = sctp6_close,
1188 .pru_detach = sctp6_close,
1189 .pru_sopoll = sopoll_generic,
1190 .pru_flush = sctp_flush,
1191 .pru_disconnect = sctp6_disconnect,
1192 .pru_listen = sctp_listen,
1193 .pru_peeraddr = sctp6_getpeeraddr,
1194 .pru_send = sctp6_send,
1195 .pru_shutdown = sctp_shutdown,
1196 .pru_sockaddr = sctp6_in6getaddr,
1197 .pru_sosend = sctp_sosend,
1198 .pru_soreceive = sctp_soreceive