2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctp_var.h>
44 #include <netinet6/sctp6_var.h>
45 #include <netinet/sctp_sysctl.h>
46 #include <netinet/sctp_output.h>
47 #include <netinet/sctp_uio.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctputil.h>
50 #include <netinet/sctp_indata.h>
51 #include <netinet/sctp_timer.h>
52 #include <netinet/sctp_auth.h>
53 #include <netinet/sctp_input.h>
54 #include <netinet/sctp_output.h>
55 #include <netinet/sctp_bsd_addr.h>
56 #include <netinet/sctp_crc32.h>
57 #include <netinet/icmp6.h>
58 #include <netinet/udp.h>
60 extern struct protosw inetsw[];
63 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port)
69 struct sockaddr_in6 src, dst;
72 struct sctp_chunkhdr *ch;
80 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) {
81 SCTP_RELEASE_PKT(*i_pak);
82 return (IPPROTO_DONE);
84 m = SCTP_HEADER_TO_CHAIN(*i_pak);
85 #ifdef SCTP_MBUF_LOGGING
86 /* Log in any input mbufs */
87 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
88 sctp_log_mbc(m, SCTP_MBUF_INPUT);
91 #ifdef SCTP_PACKET_LOGGING
92 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
96 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
97 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
99 if_name(m->m_pkthdr.rcvif),
100 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
101 mflowid = m->m_pkthdr.flowid;
102 mflowtype = M_HASHTYPE_GET(m);
103 fibnum = M_GETFIB(m);
104 SCTP_STAT_INCR(sctps_recvpackets);
105 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
106 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
107 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
108 ip6 = mtod(m, struct ip6_hdr *);
109 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen,
110 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)));
112 SCTP_STAT_INCR(sctps_hdrops);
113 return (IPPROTO_DONE);
115 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
116 offset -= sizeof(struct sctp_chunkhdr);
117 memset(&src, 0, sizeof(struct sockaddr_in6));
118 src.sin6_family = AF_INET6;
119 src.sin6_len = sizeof(struct sockaddr_in6);
120 src.sin6_port = sh->src_port;
121 src.sin6_addr = ip6->ip6_src;
122 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
125 memset(&dst, 0, sizeof(struct sockaddr_in6));
126 dst.sin6_family = AF_INET6;
127 dst.sin6_len = sizeof(struct sockaddr_in6);
128 dst.sin6_port = sh->dest_port;
129 dst.sin6_addr = ip6->ip6_dst;
130 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
133 length = ntohs(ip6->ip6_plen) + iphlen;
134 /* Validate mbuf chain length with IP payload length. */
135 if (SCTP_HEADER_LEN(m) != length) {
136 SCTPDBG(SCTP_DEBUG_INPUT1,
137 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
138 SCTP_STAT_INCR(sctps_hdrops);
141 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
144 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
145 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
146 SCTP_STAT_INCR(sctps_recvhwcrc);
149 SCTP_STAT_INCR(sctps_recvswcrc);
152 sctp_common_input_processing(&m, iphlen, offset, length,
153 (struct sockaddr *)&src,
154 (struct sockaddr *)&dst,
158 mflowtype, mflowid, fibnum,
164 return (IPPROTO_DONE);
169 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
171 return (sctp6_input_with_port(i_pak, offp, 0));
175 sctp6_notify(struct sctp_inpcb *inp,
176 struct sctp_tcb *stcb,
177 struct sctp_nets *net,
182 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
187 switch (icmp6_type) {
188 case ICMP6_DST_UNREACH:
189 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) ||
190 (icmp6_code == ICMP6_DST_UNREACH_ADMIN) ||
191 (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) ||
192 (icmp6_code == ICMP6_DST_UNREACH_ADDR)) {
193 /* Mark the net unreachable. */
194 if (net->dest_state & SCTP_ADDR_REACHABLE) {
195 /* Ok that destination is not reachable */
196 net->dest_state &= ~SCTP_ADDR_REACHABLE;
197 net->dest_state &= ~SCTP_ADDR_PF;
198 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
199 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
202 SCTP_TCB_UNLOCK(stcb);
204 case ICMP6_PARAM_PROB:
205 /* Treat it like an ABORT. */
206 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) {
207 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED);
208 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
209 so = SCTP_INP_SO(inp);
210 atomic_add_int(&stcb->asoc.refcnt, 1);
211 SCTP_TCB_UNLOCK(stcb);
212 SCTP_SOCKET_LOCK(so, 1);
214 atomic_subtract_int(&stcb->asoc.refcnt, 1);
216 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
217 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2);
218 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
219 SCTP_SOCKET_UNLOCK(so, 1);
222 SCTP_TCB_UNLOCK(stcb);
225 case ICMP6_PACKET_TOO_BIG:
226 if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
227 SCTP_TCB_UNLOCK(stcb);
230 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) {
232 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
233 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1);
237 /* Update the path MTU. */
239 next_mtu -= sizeof(struct udphdr);
241 if (net->mtu > next_mtu) {
244 /* Update the association MTU */
245 if (stcb->asoc.smallest_mtu > next_mtu) {
246 sctp_pathmtu_adjustment(stcb, next_mtu);
248 /* Finally, start the PMTU timer if it was running before. */
250 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
252 SCTP_TCB_UNLOCK(stcb);
255 SCTP_TCB_UNLOCK(stcb);
261 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
263 struct ip6ctlparam *ip6cp;
264 struct sctp_inpcb *inp;
265 struct sctp_tcb *stcb;
266 struct sctp_nets *net;
268 struct sockaddr_in6 src, dst;
270 if (pktdst->sa_family != AF_INET6 ||
271 pktdst->sa_len != sizeof(struct sockaddr_in6)) {
275 if ((unsigned)cmd >= PRC_NCMDS) {
278 if (PRC_IS_REDIRECT(cmd)) {
280 } else if (inet6ctlerrmap[cmd] == 0) {
283 /* If the parameter is from icmp6, decode it. */
285 ip6cp = (struct ip6ctlparam *)d;
287 ip6cp = (struct ip6ctlparam *)NULL;
292 * XXX: We assume that when IPV6 is non NULL, M and OFF are
295 if (ip6cp->ip6c_m == NULL) {
300 * Check if we can safely examine the ports and the
301 * verification tag of the SCTP common header.
303 if (ip6cp->ip6c_m->m_pkthdr.len <
304 (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) {
308 /* Copy out the port numbers and the verification tag. */
309 memset(&sh, 0, sizeof(sh));
310 m_copydata(ip6cp->ip6c_m,
312 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
314 memset(&src, 0, sizeof(struct sockaddr_in6));
315 src.sin6_family = AF_INET6;
316 src.sin6_len = sizeof(struct sockaddr_in6);
317 src.sin6_port = sh.src_port;
318 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
319 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
322 memset(&dst, 0, sizeof(struct sockaddr_in6));
323 dst.sin6_family = AF_INET6;
324 dst.sin6_len = sizeof(struct sockaddr_in6);
325 dst.sin6_port = sh.dest_port;
326 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
327 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
332 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
333 (struct sockaddr *)&src,
334 &inp, &net, 1, SCTP_DEFAULT_VRFID);
335 if ((stcb != NULL) &&
338 /* Check the verification tag */
339 if (ntohl(sh.v_tag) != 0) {
341 * This must be the verification tag used
342 * for sending out packets. We don't
343 * consider packets reflecting the
346 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
347 SCTP_TCB_UNLOCK(stcb);
351 if (ip6cp->ip6c_m->m_pkthdr.len >=
352 ip6cp->ip6c_off + sizeof(struct sctphdr) +
353 sizeof(struct sctp_chunkhdr) +
354 offsetof(struct sctp_init, a_rwnd)) {
356 * In this case we can check if we
357 * got an INIT chunk and if the
358 * initiate tag matches.
360 uint32_t initiate_tag;
363 m_copydata(ip6cp->ip6c_m,
365 sizeof(struct sctphdr),
367 (caddr_t)&chunk_type);
368 m_copydata(ip6cp->ip6c_m,
370 sizeof(struct sctphdr) +
371 sizeof(struct sctp_chunkhdr),
373 (caddr_t)&initiate_tag);
374 if ((chunk_type != SCTP_INITIATION) ||
375 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
376 SCTP_TCB_UNLOCK(stcb);
380 SCTP_TCB_UNLOCK(stcb);
384 sctp6_notify(inp, stcb, net,
385 ip6cp->ip6c_icmp6->icmp6_type,
386 ip6cp->ip6c_icmp6->icmp6_code,
387 ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
389 if ((stcb == NULL) && (inp != NULL)) {
390 /* reduce inp's ref-count */
392 SCTP_INP_DECR_REF(inp);
393 SCTP_INP_WUNLOCK(inp);
396 SCTP_TCB_UNLOCK(stcb);
403 * this routine can probably be collasped into the one in sctp_userreq.c
404 * since they do the same thing and now we lookup with a sockaddr
407 sctp6_getcred(SYSCTL_HANDLER_ARGS)
410 struct sockaddr_in6 addrs[2];
411 struct sctp_inpcb *inp;
412 struct sctp_nets *net;
413 struct sctp_tcb *stcb;
417 vrf_id = SCTP_DEFAULT_VRFID;
419 error = priv_check(req->td, PRIV_NETINET_GETCRED);
423 if (req->newlen != sizeof(addrs)) {
424 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
427 if (req->oldlen != sizeof(struct ucred)) {
428 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
431 error = SYSCTL_IN(req, addrs, sizeof(addrs));
435 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
437 &inp, &net, 1, vrf_id);
438 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
439 if ((inp != NULL) && (stcb == NULL)) {
440 /* reduce ref-count */
442 SCTP_INP_DECR_REF(inp);
445 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
449 SCTP_TCB_UNLOCK(stcb);
451 * We use the write lock here, only since in the error leg we need
452 * it. If we used RLOCK, then we would have to
453 * wlock/decr/unlock/rlock. Which in theory could create a hole.
454 * Better to use higher wlock.
458 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
460 SCTP_INP_WUNLOCK(inp);
463 cru2x(inp->sctp_socket->so_cred, &xuc);
464 SCTP_INP_WUNLOCK(inp);
465 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
470 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
472 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
475 /* This is the same as the sctp_abort() could be made common */
477 sctp6_abort(struct socket *so)
479 struct sctp_inpcb *inp;
482 inp = (struct sctp_inpcb *)so->so_pcb;
484 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
488 flags = inp->sctp_flags;
489 #ifdef SCTP_LOG_CLOSING
490 sctp_log_closing(inp, NULL, 17);
492 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
493 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
494 #ifdef SCTP_LOG_CLOSING
495 sctp_log_closing(inp, NULL, 16);
497 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
498 SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
500 SCTP_SB_CLEAR(so->so_snd);
502 * same for the rcv ones, they are only here for the
505 SCTP_SB_CLEAR(so->so_rcv);
506 /* Now null out the reference, we are completely detached. */
510 flags = inp->sctp_flags;
511 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
512 goto sctp_must_try_again;
519 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
522 struct sctp_inpcb *inp;
523 uint32_t vrf_id = SCTP_DEFAULT_VRFID;
525 inp = (struct sctp_inpcb *)so->so_pcb;
527 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
531 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
532 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
536 error = sctp_inpcb_alloc(so, vrf_id);
539 inp = (struct sctp_inpcb *)so->so_pcb;
541 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */
543 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
544 inp->ip_inp.inp.in6p_hops = -1; /* use kernel default */
545 inp->ip_inp.inp.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 inp->ip_inp.inp.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;
564 inp = (struct sctp_inpcb *)so->so_pcb;
566 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
571 switch (addr->sa_family) {
574 if (addr->sa_len != sizeof(struct sockaddr_in)) {
575 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
582 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
583 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
589 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
593 inp->ip_inp.inp.inp_vflag &= ~INP_IPV4;
594 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
595 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp) == 0)) {
596 switch (addr->sa_family) {
599 /* binding v4 addr to v6 socket, so reset flags */
600 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
601 inp->ip_inp.inp.inp_vflag &= ~INP_IPV6;
607 struct sockaddr_in6 *sin6_p;
609 sin6_p = (struct sockaddr_in6 *)addr;
611 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
612 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
615 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
616 struct sockaddr_in sin;
618 in6_sin6_2_sin(&sin, sin6_p);
619 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
620 inp->ip_inp.inp.inp_vflag &= ~INP_IPV6;
621 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
631 } else if (addr != NULL) {
632 struct sockaddr_in6 *sin6_p;
634 /* IPV6_V6ONLY socket */
636 if (addr->sa_family == AF_INET) {
637 /* can't bind v4 addr to v6 only socket! */
638 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
642 sin6_p = (struct sockaddr_in6 *)addr;
644 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
645 /* can't bind v4-mapped addrs either! */
646 /* NOTE: we don't support SIIT */
647 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
651 error = sctp_inpcb_bind(so, addr, NULL, p);
657 sctp6_close(struct socket *so)
662 /* This could be made common with sctp_detach() since they are identical */
666 sctp6_disconnect(struct socket *so)
668 return (sctp_disconnect(so));
673 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
674 struct mbuf *control, struct thread *p);
678 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
679 struct mbuf *control, struct thread *p)
681 struct sctp_inpcb *inp;
684 struct sockaddr_in6 *sin6;
686 /* No SPL needed since sctp_output does this */
688 inp = (struct sctp_inpcb *)so->so_pcb;
691 SCTP_RELEASE_PKT(control);
695 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
699 * For the TCP model we may get a NULL addr, if we are a connected
702 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
709 SCTP_RELEASE_PKT(control);
712 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
713 return (EDESTADDRREQ);
716 sin6 = (struct sockaddr_in6 *)addr;
717 if (SCTP_IPV6_V6ONLY(inp)) {
719 * if IPV6_V6ONLY flag, we discard datagrams destined to a
720 * v4 addr or v4-mapped addr
722 if (addr->sa_family == AF_INET) {
723 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
726 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
727 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
731 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
732 struct sockaddr_in sin;
734 /* convert v4-mapped into v4 addr and send */
735 in6_sin6_2_sin(&sin, sin6);
736 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
740 /* now what about control */
743 SCTP_PRINTF("huh? control set?\n");
744 SCTP_RELEASE_PKT(inp->control);
747 inp->control = control;
751 SCTP_BUF_NEXT(inp->pkt_last) = m;
754 inp->pkt_last = inp->pkt = m;
757 /* FreeBSD and MacOSX uses a flag passed */
758 ((flags & PRUS_MORETOCOME) == 0)
761 * note with the current version this code will only be used
762 * by OpenBSD, NetBSD and FreeBSD have methods for
763 * re-defining sosend() to use sctp_sosend(). One can
764 * optionaly switch back to this code (by changing back the
765 * defininitions but this is not advisable.
769 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
779 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
783 struct sctp_inpcb *inp;
784 struct sctp_tcb *stcb;
786 struct sockaddr_in6 *sin6;
787 union sctp_sockstore store;
790 inp = (struct sctp_inpcb *)so->so_pcb;
792 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
793 return (ECONNRESET); /* I made the same as TCP since we are
797 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
800 switch (addr->sa_family) {
803 if (addr->sa_len != sizeof(struct sockaddr_in)) {
804 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
811 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
812 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
818 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
822 vrf_id = inp->def_vrf_id;
823 SCTP_ASOC_CREATE_LOCK(inp);
825 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
826 SCTP_PCB_FLAGS_UNBOUND) {
827 /* Bind a ephemeral port */
828 SCTP_INP_RUNLOCK(inp);
829 error = sctp6_bind(so, NULL, p);
831 SCTP_ASOC_CREATE_UNLOCK(inp);
837 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
838 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
839 /* We are already connected AND the TCP model */
840 SCTP_INP_RUNLOCK(inp);
841 SCTP_ASOC_CREATE_UNLOCK(inp);
842 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
846 sin6 = (struct sockaddr_in6 *)addr;
847 if (SCTP_IPV6_V6ONLY(inp)) {
849 * if IPV6_V6ONLY flag, ignore connections destined to a v4
850 * addr or v4-mapped addr
852 if (addr->sa_family == AF_INET) {
853 SCTP_INP_RUNLOCK(inp);
854 SCTP_ASOC_CREATE_UNLOCK(inp);
855 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
858 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
859 SCTP_INP_RUNLOCK(inp);
860 SCTP_ASOC_CREATE_UNLOCK(inp);
861 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
865 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
866 /* convert v4-mapped into v4 addr */
867 in6_sin6_2_sin(&store.sin, sin6);
871 /* Now do we connect? */
872 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
873 stcb = LIST_FIRST(&inp->sctp_asoc_list);
877 SCTP_INP_RUNLOCK(inp);
879 SCTP_INP_RUNLOCK(inp);
881 SCTP_INP_INCR_REF(inp);
882 SCTP_INP_WUNLOCK(inp);
883 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
886 SCTP_INP_DECR_REF(inp);
887 SCTP_INP_WUNLOCK(inp);
892 /* Already have or am bring up an association */
893 SCTP_ASOC_CREATE_UNLOCK(inp);
894 SCTP_TCB_UNLOCK(stcb);
895 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
898 /* We are GOOD to go */
899 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
900 inp->sctp_ep.pre_open_stream_count,
901 inp->sctp_ep.port, p,
902 SCTP_INITIALIZE_AUTH_PARAMS);
903 SCTP_ASOC_CREATE_UNLOCK(inp);
908 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
909 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
910 /* Set the connected flag so we can queue data */
913 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
914 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
915 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
916 SCTP_TCB_UNLOCK(stcb);
921 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
923 struct sockaddr_in6 *sin6;
924 struct sctp_inpcb *inp;
926 struct sctp_ifa *sctp_ifa;
931 * Do the malloc first in case it blocks.
933 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
936 sin6->sin6_family = AF_INET6;
937 sin6->sin6_len = sizeof(*sin6);
939 inp = (struct sctp_inpcb *)so->so_pcb;
941 SCTP_FREE_SONAME(sin6);
942 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
946 sin6->sin6_port = inp->sctp_lport;
947 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
948 /* For the bound all case you get back 0 */
949 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
950 struct sctp_tcb *stcb;
951 struct sockaddr_in6 *sin_a6;
952 struct sctp_nets *net;
955 stcb = LIST_FIRST(&inp->sctp_asoc_list);
957 SCTP_INP_RUNLOCK(inp);
958 SCTP_FREE_SONAME(sin6);
959 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
964 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
965 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
967 /* this will make coverity happy */
970 if (sin_a6->sin6_family == AF_INET6) {
975 if ((!fnd) || (sin_a6 == NULL)) {
977 SCTP_INP_RUNLOCK(inp);
978 SCTP_FREE_SONAME(sin6);
979 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
982 vrf_id = inp->def_vrf_id;
983 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id);
985 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
988 /* For the bound all case you get back 0 */
989 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
992 /* Take the first IPv6 address in the list */
993 struct sctp_laddr *laddr;
996 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
997 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
998 struct sockaddr_in6 *sin_a;
1000 sin_a = &laddr->ifa->address.sin6;
1001 sin6->sin6_addr = sin_a->sin6_addr;
1007 SCTP_FREE_SONAME(sin6);
1008 SCTP_INP_RUNLOCK(inp);
1009 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1013 SCTP_INP_RUNLOCK(inp);
1014 /* Scoping things for v6 */
1015 if ((error = sa6_recoverscope(sin6)) != 0) {
1016 SCTP_FREE_SONAME(sin6);
1019 (*addr) = (struct sockaddr *)sin6;
1024 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1026 struct sockaddr_in6 *sin6;
1028 struct sockaddr_in6 *sin_a6;
1029 struct sctp_inpcb *inp;
1030 struct sctp_tcb *stcb;
1031 struct sctp_nets *net;
1034 /* Do the malloc first in case it blocks. */
1035 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1038 sin6->sin6_family = AF_INET6;
1039 sin6->sin6_len = sizeof(*sin6);
1041 inp = (struct sctp_inpcb *)so->so_pcb;
1042 if ((inp == NULL) ||
1043 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
1044 /* UDP type and listeners will drop out here */
1045 SCTP_FREE_SONAME(sin6);
1046 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
1049 SCTP_INP_RLOCK(inp);
1050 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1052 SCTP_TCB_LOCK(stcb);
1054 SCTP_INP_RUNLOCK(inp);
1056 SCTP_FREE_SONAME(sin6);
1057 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1058 return (ECONNRESET);
1061 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1062 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1063 if (sin_a6->sin6_family == AF_INET6) {
1065 sin6->sin6_port = stcb->rport;
1066 sin6->sin6_addr = sin_a6->sin6_addr;
1070 SCTP_TCB_UNLOCK(stcb);
1072 /* No IPv4 address */
1073 SCTP_FREE_SONAME(sin6);
1074 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1077 if ((error = sa6_recoverscope(sin6)) != 0) {
1078 SCTP_FREE_SONAME(sin6);
1079 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error);
1082 *addr = (struct sockaddr *)sin6;
1087 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1089 struct inpcb *inp = sotoinpcb(so);
1093 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1097 /* allow v6 addresses precedence */
1098 error = sctp6_getaddr(so, nam);
1101 struct sockaddr_in6 *sin6;
1103 /* try v4 next if v6 failed */
1104 error = sctp_ingetaddr(so, nam);
1108 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1110 SCTP_FREE_SONAME(*nam);
1113 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1114 SCTP_FREE_SONAME(*nam);
1115 *nam = (struct sockaddr *)sin6;
1123 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1125 struct inpcb *inp = sotoinpcb(so);
1129 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1133 /* allow v6 addresses precedence */
1134 error = sctp6_peeraddr(so, nam);
1137 struct sockaddr_in6 *sin6;
1139 /* try v4 next if v6 failed */
1140 error = sctp_peeraddr(so, nam);
1144 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1146 SCTP_FREE_SONAME(*nam);
1149 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1150 SCTP_FREE_SONAME(*nam);
1151 *nam = (struct sockaddr *)sin6;
1157 struct pr_usrreqs sctp6_usrreqs = {
1158 .pru_abort = sctp6_abort,
1159 .pru_accept = sctp_accept,
1160 .pru_attach = sctp6_attach,
1161 .pru_bind = sctp6_bind,
1162 .pru_connect = sctp6_connect,
1163 .pru_control = in6_control,
1164 .pru_close = sctp6_close,
1165 .pru_detach = sctp6_close,
1166 .pru_sopoll = sopoll_generic,
1167 .pru_flush = sctp_flush,
1168 .pru_disconnect = sctp6_disconnect,
1169 .pru_listen = sctp_listen,
1170 .pru_peeraddr = sctp6_getpeeraddr,
1171 .pru_send = sctp6_send,
1172 .pru_shutdown = sctp_shutdown,
1173 .pru_sockaddr = sctp6_in6getaddr,
1174 .pru_sosend = sctp_sosend,
1175 .pru_soreceive = sctp_soreceive