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);
247 /* Update the path MTU. */
248 if (net->mtu > next_mtu) {
251 net->mtu -= sizeof(struct udphdr);
254 /* Update the association MTU */
255 if (stcb->asoc.smallest_mtu > next_mtu) {
256 sctp_pathmtu_adjustment(stcb, next_mtu);
258 /* Finally, start the PMTU timer if it was running before. */
260 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
262 SCTP_TCB_UNLOCK(stcb);
265 SCTP_TCB_UNLOCK(stcb);
271 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
273 struct ip6ctlparam *ip6cp;
274 struct sctp_inpcb *inp;
275 struct sctp_tcb *stcb;
276 struct sctp_nets *net;
278 struct sockaddr_in6 src, dst;
280 if (pktdst->sa_family != AF_INET6 ||
281 pktdst->sa_len != sizeof(struct sockaddr_in6)) {
284 if ((unsigned)cmd >= PRC_NCMDS) {
287 if (PRC_IS_REDIRECT(cmd)) {
289 } else if (inet6ctlerrmap[cmd] == 0) {
292 /* If the parameter is from icmp6, decode it. */
294 ip6cp = (struct ip6ctlparam *)d;
296 ip6cp = (struct ip6ctlparam *)NULL;
301 * XXX: We assume that when IPV6 is non NULL, M and OFF are
304 if (ip6cp->ip6c_m == NULL) {
308 * Check if we can safely examine the ports and the
309 * verification tag of the SCTP common header.
311 if (ip6cp->ip6c_m->m_pkthdr.len <
312 (int32_t) (ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) {
315 /* Copy out the port numbers and the verification tag. */
316 bzero(&sh, sizeof(sh));
317 m_copydata(ip6cp->ip6c_m,
319 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
321 memset(&src, 0, sizeof(struct sockaddr_in6));
322 src.sin6_family = AF_INET6;
323 src.sin6_len = sizeof(struct sockaddr_in6);
324 src.sin6_port = sh.src_port;
325 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
326 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
329 memset(&dst, 0, sizeof(struct sockaddr_in6));
330 dst.sin6_family = AF_INET6;
331 dst.sin6_len = sizeof(struct sockaddr_in6);
332 dst.sin6_port = sh.dest_port;
333 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
334 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
339 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
340 (struct sockaddr *)&src,
341 &inp, &net, 1, SCTP_DEFAULT_VRFID);
342 if ((stcb != NULL) &&
345 /* Check the verification tag */
346 if (ntohl(sh.v_tag) != 0) {
348 * This must be the verification tag used
349 * for sending out packets. We don't
350 * consider packets reflecting the
353 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
354 SCTP_TCB_UNLOCK(stcb);
358 if (ip6cp->ip6c_m->m_pkthdr.len >=
359 ip6cp->ip6c_off + sizeof(struct sctphdr) +
360 sizeof(struct sctp_chunkhdr) +
361 offsetof(struct sctp_init, a_rwnd)) {
363 * In this case we can check if we
364 * got an INIT chunk and if the
365 * initiate tag matches.
367 uint32_t initiate_tag;
370 m_copydata(ip6cp->ip6c_m,
372 sizeof(struct sctphdr),
374 (caddr_t)&chunk_type);
375 m_copydata(ip6cp->ip6c_m,
377 sizeof(struct sctphdr) +
378 sizeof(struct sctp_chunkhdr),
380 (caddr_t)&initiate_tag);
381 if ((chunk_type != SCTP_INITIATION) ||
382 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
383 SCTP_TCB_UNLOCK(stcb);
387 SCTP_TCB_UNLOCK(stcb);
391 sctp6_notify(inp, stcb, net,
392 ip6cp->ip6c_icmp6->icmp6_type,
393 ip6cp->ip6c_icmp6->icmp6_code,
394 (uint16_t) ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
396 if ((stcb == NULL) && (inp != NULL)) {
397 /* reduce inp's ref-count */
399 SCTP_INP_DECR_REF(inp);
400 SCTP_INP_WUNLOCK(inp);
403 SCTP_TCB_UNLOCK(stcb);
410 * this routine can probably be collasped into the one in sctp_userreq.c
411 * since they do the same thing and now we lookup with a sockaddr
414 sctp6_getcred(SYSCTL_HANDLER_ARGS)
417 struct sockaddr_in6 addrs[2];
418 struct sctp_inpcb *inp;
419 struct sctp_nets *net;
420 struct sctp_tcb *stcb;
424 vrf_id = SCTP_DEFAULT_VRFID;
426 error = priv_check(req->td, PRIV_NETINET_GETCRED);
430 if (req->newlen != sizeof(addrs)) {
431 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
434 if (req->oldlen != sizeof(struct ucred)) {
435 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
438 error = SYSCTL_IN(req, addrs, sizeof(addrs));
442 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
444 &inp, &net, 1, vrf_id);
445 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
446 if ((inp != NULL) && (stcb == NULL)) {
447 /* reduce ref-count */
449 SCTP_INP_DECR_REF(inp);
452 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
456 SCTP_TCB_UNLOCK(stcb);
458 * We use the write lock here, only since in the error leg we need
459 * it. If we used RLOCK, then we would have to
460 * wlock/decr/unlock/rlock. Which in theory could create a hole.
461 * Better to use higher wlock.
465 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
467 SCTP_INP_WUNLOCK(inp);
470 cru2x(inp->sctp_socket->so_cred, &xuc);
471 SCTP_INP_WUNLOCK(inp);
472 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
477 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
479 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
482 /* This is the same as the sctp_abort() could be made common */
484 sctp6_abort(struct socket *so)
486 struct sctp_inpcb *inp;
489 inp = (struct sctp_inpcb *)so->so_pcb;
491 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
495 flags = inp->sctp_flags;
496 #ifdef SCTP_LOG_CLOSING
497 sctp_log_closing(inp, NULL, 17);
499 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
500 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
501 #ifdef SCTP_LOG_CLOSING
502 sctp_log_closing(inp, NULL, 16);
504 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
505 SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
507 SCTP_SB_CLEAR(so->so_snd);
509 * same for the rcv ones, they are only here for the
512 SCTP_SB_CLEAR(so->so_rcv);
513 /* Now null out the reference, we are completely detached. */
517 flags = inp->sctp_flags;
518 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
519 goto sctp_must_try_again;
526 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
530 struct sctp_inpcb *inp;
531 uint32_t vrf_id = SCTP_DEFAULT_VRFID;
533 inp = (struct sctp_inpcb *)so->so_pcb;
535 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
538 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
539 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
543 error = sctp_inpcb_alloc(so, vrf_id);
546 inp = (struct sctp_inpcb *)so->so_pcb;
548 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */
549 inp6 = (struct in6pcb *)inp;
551 inp6->inp_vflag |= INP_IPV6;
552 inp6->in6p_hops = -1; /* use kernel default */
553 inp6->in6p_cksum = -1; /* just to be sure */
556 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
557 * socket as well, because the socket may be bound to an IPv6
558 * wildcard address, which may match an IPv4-mapped IPv6 address.
560 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
563 * Hmm what about the IPSEC stuff that is missing here but in
566 SCTP_INP_WUNLOCK(inp);
571 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
573 struct sctp_inpcb *inp;
577 inp = (struct sctp_inpcb *)so->so_pcb;
579 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
583 switch (addr->sa_family) {
586 if (addr->sa_len != sizeof(struct sockaddr_in)) {
587 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
594 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
595 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
601 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
605 inp6 = (struct in6pcb *)inp;
606 inp6->inp_vflag &= ~INP_IPV4;
607 inp6->inp_vflag |= INP_IPV6;
608 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) {
609 switch (addr->sa_family) {
612 /* binding v4 addr to v6 socket, so reset flags */
613 inp6->inp_vflag |= INP_IPV4;
614 inp6->inp_vflag &= ~INP_IPV6;
620 struct sockaddr_in6 *sin6_p;
622 sin6_p = (struct sockaddr_in6 *)addr;
624 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
625 inp6->inp_vflag |= INP_IPV4;
628 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
629 struct sockaddr_in sin;
631 in6_sin6_2_sin(&sin, sin6_p);
632 inp6->inp_vflag |= INP_IPV4;
633 inp6->inp_vflag &= ~INP_IPV6;
634 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
644 } else if (addr != NULL) {
645 struct sockaddr_in6 *sin6_p;
647 /* IPV6_V6ONLY socket */
649 if (addr->sa_family == AF_INET) {
650 /* can't bind v4 addr to v6 only socket! */
651 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
655 sin6_p = (struct sockaddr_in6 *)addr;
657 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
658 /* can't bind v4-mapped addrs either! */
659 /* NOTE: we don't support SIIT */
660 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
664 error = sctp_inpcb_bind(so, addr, NULL, p);
670 sctp6_close(struct socket *so)
675 /* This could be made common with sctp_detach() since they are identical */
679 sctp6_disconnect(struct socket *so)
681 return (sctp_disconnect(so));
686 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
687 struct mbuf *control, struct thread *p);
691 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
692 struct mbuf *control, struct thread *p)
694 struct sctp_inpcb *inp;
698 struct sockaddr_in6 *sin6;
701 /* No SPL needed since sctp_output does this */
703 inp = (struct sctp_inpcb *)so->so_pcb;
706 SCTP_RELEASE_PKT(control);
710 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
713 inp6 = (struct in6pcb *)inp;
715 * For the TCP model we may get a NULL addr, if we are a connected
718 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
725 SCTP_RELEASE_PKT(control);
728 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
729 return (EDESTADDRREQ);
732 sin6 = (struct sockaddr_in6 *)addr;
733 if (SCTP_IPV6_V6ONLY(inp6)) {
735 * if IPV6_V6ONLY flag, we discard datagrams destined to a
736 * v4 addr or v4-mapped addr
738 if (addr->sa_family == AF_INET) {
739 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
742 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
743 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
747 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
748 struct sockaddr_in sin;
750 /* convert v4-mapped into v4 addr and send */
751 in6_sin6_2_sin(&sin, sin6);
752 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
756 /* now what about control */
759 SCTP_PRINTF("huh? control set?\n");
760 SCTP_RELEASE_PKT(inp->control);
763 inp->control = control;
767 SCTP_BUF_NEXT(inp->pkt_last) = m;
770 inp->pkt_last = inp->pkt = m;
773 /* FreeBSD and MacOSX uses a flag passed */
774 ((flags & PRUS_MORETOCOME) == 0)
777 * note with the current version this code will only be used
778 * by OpenBSD, NetBSD and FreeBSD have methods for
779 * re-defining sosend() to use sctp_sosend(). One can
780 * optionaly switch back to this code (by changing back the
781 * defininitions but this is not advisable.
785 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
795 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
799 struct sctp_inpcb *inp;
800 struct sctp_tcb *stcb;
804 struct sockaddr_in6 *sin6;
805 union sctp_sockstore store;
810 inp6 = (struct in6pcb *)so->so_pcb;
812 inp = (struct sctp_inpcb *)so->so_pcb;
814 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
815 return (ECONNRESET); /* I made the same as TCP since we are
819 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
822 switch (addr->sa_family) {
825 if (addr->sa_len != sizeof(struct sockaddr_in)) {
826 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
833 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
834 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
840 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
844 vrf_id = inp->def_vrf_id;
845 SCTP_ASOC_CREATE_LOCK(inp);
847 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
848 SCTP_PCB_FLAGS_UNBOUND) {
849 /* Bind a ephemeral port */
850 SCTP_INP_RUNLOCK(inp);
851 error = sctp6_bind(so, NULL, p);
853 SCTP_ASOC_CREATE_UNLOCK(inp);
859 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
860 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
861 /* We are already connected AND the TCP model */
862 SCTP_INP_RUNLOCK(inp);
863 SCTP_ASOC_CREATE_UNLOCK(inp);
864 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
868 sin6 = (struct sockaddr_in6 *)addr;
869 if (SCTP_IPV6_V6ONLY(inp6)) {
871 * if IPV6_V6ONLY flag, ignore connections destined to a v4
872 * addr or v4-mapped addr
874 if (addr->sa_family == AF_INET) {
875 SCTP_INP_RUNLOCK(inp);
876 SCTP_ASOC_CREATE_UNLOCK(inp);
877 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
880 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
881 SCTP_INP_RUNLOCK(inp);
882 SCTP_ASOC_CREATE_UNLOCK(inp);
883 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
887 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
888 /* convert v4-mapped into v4 addr */
889 in6_sin6_2_sin(&store.sin, sin6);
893 /* Now do we connect? */
894 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
895 stcb = LIST_FIRST(&inp->sctp_asoc_list);
897 SCTP_TCB_UNLOCK(stcb);
899 SCTP_INP_RUNLOCK(inp);
901 SCTP_INP_RUNLOCK(inp);
903 SCTP_INP_INCR_REF(inp);
904 SCTP_INP_WUNLOCK(inp);
905 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
908 SCTP_INP_DECR_REF(inp);
909 SCTP_INP_WUNLOCK(inp);
914 /* Already have or am bring up an association */
915 SCTP_ASOC_CREATE_UNLOCK(inp);
916 SCTP_TCB_UNLOCK(stcb);
917 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
920 /* We are GOOD to go */
921 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
922 inp->sctp_ep.pre_open_stream_count,
923 inp->sctp_ep.port, 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