1 /*-
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.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
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.
15 *
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.
19 *
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.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/11.0/sys/netinet6/sctp6_usrreq.c 302138 2016-06-23 09:13:15Z tuexen $");
35
36 #include <netinet/sctp_os.h>
37 #ifdef INET6
38 #include <sys/proc.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>
57
58 #ifdef IPSEC
59 #include <netipsec/ipsec.h>
60 #include <netipsec/ipsec6.h>
61 #endif /* IPSEC */
62
63 extern struct protosw inetsw[];
64
65 int
66 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port)
67 {
68 struct mbuf *m;
69 int iphlen;
70 uint32_t vrf_id;
71 uint8_t ecn_bits;
72 struct sockaddr_in6 src, dst;
73 struct ip6_hdr *ip6;
74 struct sctphdr *sh;
75 struct sctp_chunkhdr *ch;
76 int length, offset;
77
78 #if !defined(SCTP_WITH_NO_CSUM)
79 uint8_t compute_crc;
80
81 #endif
82 uint32_t mflowid;
83 uint8_t mflowtype;
84 uint16_t fibnum;
85
86 iphlen = *offp;
87 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) {
88 SCTP_RELEASE_PKT(*i_pak);
89 return (IPPROTO_DONE);
90 }
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);
96 }
97 #endif
98 #ifdef SCTP_PACKET_LOGGING
99 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
100 sctp_packet_log(m);
101 }
102 #endif
103 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
104 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
105 m->m_pkthdr.len,
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)));
118 if (sh == NULL) {
119 SCTP_STAT_INCR(sctps_hdrops);
120 return (IPPROTO_DONE);
121 }
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) {
130 goto out;
131 }
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) {
138 goto out;
139 }
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);
146 goto out;
147 }
148 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
149 goto out;
150 }
151 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
152 #if defined(SCTP_WITH_NO_CSUM)
153 SCTP_STAT_INCR(sctps_recvnocrc);
154 #else
155 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
156 SCTP_STAT_INCR(sctps_recvhwcrc);
157 compute_crc = 0;
158 } else {
159 SCTP_STAT_INCR(sctps_recvswcrc);
160 compute_crc = 1;
161 }
162 #endif
163 sctp_common_input_processing(&m, iphlen, offset, length,
164 (struct sockaddr *)&src,
165 (struct sockaddr *)&dst,
166 sh, ch,
167 #if !defined(SCTP_WITH_NO_CSUM)
168 compute_crc,
169 #endif
170 ecn_bits,
171 mflowtype, mflowid, fibnum,
172 vrf_id, port);
173 out:
174 if (m) {
175 sctp_m_freem(m);
176 }
177 return (IPPROTO_DONE);
178 }
179
180
181 int
182 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
183 {
184 return (sctp6_input_with_port(i_pak, offp, 0));
185 }
186
187 void
188 sctp6_notify(struct sctp_inpcb *inp,
189 struct sctp_tcb *stcb,
190 struct sctp_nets *net,
191 uint8_t icmp6_type,
192 uint8_t icmp6_code,
193 uint16_t next_mtu)
194 {
195 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
196 struct socket *so;
197
198 #endif
199 int timer_stopped;
200
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);
214 }
215 }
216 SCTP_TCB_UNLOCK(stcb);
217 break;
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);
227 SCTP_TCB_LOCK(stcb);
228 atomic_subtract_int(&stcb->asoc.refcnt, 1);
229 #endif
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);
234 #endif
235 } else {
236 SCTP_TCB_UNLOCK(stcb);
237 }
238 break;
239 case ICMP6_PACKET_TOO_BIG:
240 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) {
241 timer_stopped = 1;
242 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
243 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1);
244 } else {
245 timer_stopped = 0;
246 }
247 /* Update the path MTU. */
248 if (net->mtu > next_mtu) {
249 net->mtu = next_mtu;
250 if (net->port) {
251 net->mtu -= sizeof(struct udphdr);
252 }
253 }
254 /* Update the association MTU */
255 if (stcb->asoc.smallest_mtu > next_mtu) {
256 sctp_pathmtu_adjustment(stcb, next_mtu);
257 }
258 /* Finally, start the PMTU timer if it was running before. */
259 if (timer_stopped) {
260 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
261 }
262 SCTP_TCB_UNLOCK(stcb);
263 break;
264 default:
265 SCTP_TCB_UNLOCK(stcb);
266 break;
267 }
268 }
269
270 void
271 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
272 {
273 struct ip6ctlparam *ip6cp;
274 struct sctp_inpcb *inp;
275 struct sctp_tcb *stcb;
276 struct sctp_nets *net;
277 struct sctphdr sh;
278 struct sockaddr_in6 src, dst;
279
280 if (pktdst->sa_family != AF_INET6 ||
281 pktdst->sa_len != sizeof(struct sockaddr_in6)) {
282 return;
283 }
284 if ((unsigned)cmd >= PRC_NCMDS) {
285 return;
286 }
287 if (PRC_IS_REDIRECT(cmd)) {
288 d = NULL;
289 } else if (inet6ctlerrmap[cmd] == 0) {
290 return;
291 }
292 /* If the parameter is from icmp6, decode it. */
293 if (d != NULL) {
294 ip6cp = (struct ip6ctlparam *)d;
295 } else {
296 ip6cp = (struct ip6ctlparam *)NULL;
297 }
298
299 if (ip6cp != NULL) {
300 /*
301 * XXX: We assume that when IPV6 is non NULL, M and OFF are
302 * valid.
303 */
304 if (ip6cp->ip6c_m == NULL) {
305 return;
306 }
307 /*
308 * Check if we can safely examine the ports and the
309 * verification tag of the SCTP common header.
310 */
311 if (ip6cp->ip6c_m->m_pkthdr.len <
312 (int32_t) (ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) {
313 return;
314 }
315 /* Copy out the port numbers and the verification tag. */
316 bzero(&sh, sizeof(sh));
317 m_copydata(ip6cp->ip6c_m,
318 ip6cp->ip6c_off,
319 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
320 (caddr_t)&sh);
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) {
327 return;
328 }
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) {
335 return;
336 }
337 inp = NULL;
338 net = NULL;
339 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
340 (struct sockaddr *)&src,
341 &inp, &net, 1, SCTP_DEFAULT_VRFID);
342 if ((stcb != NULL) &&
343 (net != NULL) &&
344 (inp != NULL)) {
345 /* Check the verification tag */
346 if (ntohl(sh.v_tag) != 0) {
347 /*
348 * This must be the verification tag used
349 * for sending out packets. We don't
350 * consider packets reflecting the
351 * verification tag.
352 */
353 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
354 SCTP_TCB_UNLOCK(stcb);
355 return;
356 }
357 } else {
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)) {
362 /*
363 * In this case we can check if we
364 * got an INIT chunk and if the
365 * initiate tag matches.
366 */
367 uint32_t initiate_tag;
368 uint8_t chunk_type;
369
370 m_copydata(ip6cp->ip6c_m,
371 ip6cp->ip6c_off +
372 sizeof(struct sctphdr),
373 sizeof(uint8_t),
374 (caddr_t)&chunk_type);
375 m_copydata(ip6cp->ip6c_m,
376 ip6cp->ip6c_off +
377 sizeof(struct sctphdr) +
378 sizeof(struct sctp_chunkhdr),
379 sizeof(uint32_t),
380 (caddr_t)&initiate_tag);
381 if ((chunk_type != SCTP_INITIATION) ||
382 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
383 SCTP_TCB_UNLOCK(stcb);
384 return;
385 }
386 } else {
387 SCTP_TCB_UNLOCK(stcb);
388 return;
389 }
390 }
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));
395 } else {
396 if ((stcb == NULL) && (inp != NULL)) {
397 /* reduce inp's ref-count */
398 SCTP_INP_WLOCK(inp);
399 SCTP_INP_DECR_REF(inp);
400 SCTP_INP_WUNLOCK(inp);
401 }
402 if (stcb) {
403 SCTP_TCB_UNLOCK(stcb);
404 }
405 }
406 }
407 }
408
409 /*
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
412 */
413 static int
414 sctp6_getcred(SYSCTL_HANDLER_ARGS)
415 {
416 struct xucred xuc;
417 struct sockaddr_in6 addrs[2];
418 struct sctp_inpcb *inp;
419 struct sctp_nets *net;
420 struct sctp_tcb *stcb;
421 int error;
422 uint32_t vrf_id;
423
424 vrf_id = SCTP_DEFAULT_VRFID;
425
426 error = priv_check(req->td, PRIV_NETINET_GETCRED);
427 if (error)
428 return (error);
429
430 if (req->newlen != sizeof(addrs)) {
431 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
432 return (EINVAL);
433 }
434 if (req->oldlen != sizeof(struct ucred)) {
435 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
436 return (EINVAL);
437 }
438 error = SYSCTL_IN(req, addrs, sizeof(addrs));
439 if (error)
440 return (error);
441
442 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
443 sin6tosa(&addrs[0]),
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 */
448 SCTP_INP_WLOCK(inp);
449 SCTP_INP_DECR_REF(inp);
450 goto cred_can_cont;
451 }
452 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
453 error = ENOENT;
454 goto out;
455 }
456 SCTP_TCB_UNLOCK(stcb);
457 /*
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.
462 */
463 SCTP_INP_WLOCK(inp);
464 cred_can_cont:
465 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
466 if (error) {
467 SCTP_INP_WUNLOCK(inp);
468 goto out;
469 }
470 cru2x(inp->sctp_socket->so_cred, &xuc);
471 SCTP_INP_WUNLOCK(inp);
472 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
473 out:
474 return (error);
475 }
476
477 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
478 0, 0,
479 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
480
481
482 /* This is the same as the sctp_abort() could be made common */
483 static void
484 sctp6_abort(struct socket *so)
485 {
486 struct sctp_inpcb *inp;
487 uint32_t flags;
488
489 inp = (struct sctp_inpcb *)so->so_pcb;
490 if (inp == NULL) {
491 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
492 return;
493 }
494 sctp_must_try_again:
495 flags = inp->sctp_flags;
496 #ifdef SCTP_LOG_CLOSING
497 sctp_log_closing(inp, NULL, 17);
498 #endif
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);
503 #endif
504 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
505 SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
506 SOCK_LOCK(so);
507 SCTP_SB_CLEAR(so->so_snd);
508 /*
509 * same for the rcv ones, they are only here for the
510 * accounting/select.
511 */
512 SCTP_SB_CLEAR(so->so_rcv);
513 /* Now null out the reference, we are completely detached. */
514 so->so_pcb = NULL;
515 SOCK_UNLOCK(so);
516 } else {
517 flags = inp->sctp_flags;
518 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
519 goto sctp_must_try_again;
520 }
521 }
522 return;
523 }
524
525 static int
526 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
527 {
528 struct in6pcb *inp6;
529 int error;
530 struct sctp_inpcb *inp;
531 uint32_t vrf_id = SCTP_DEFAULT_VRFID;
532
533 inp = (struct sctp_inpcb *)so->so_pcb;
534 if (inp != NULL) {
535 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
536 return (EINVAL);
537 }
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));
540 if (error)
541 return (error);
542 }
543 error = sctp_inpcb_alloc(so, vrf_id);
544 if (error)
545 return (error);
546 inp = (struct sctp_inpcb *)so->so_pcb;
547 SCTP_INP_WLOCK(inp);
548 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */
549 inp6 = (struct in6pcb *)inp;
550
551 inp6->inp_vflag |= INP_IPV6;
552 inp6->in6p_hops = -1; /* use kernel default */
553 inp6->in6p_cksum = -1; /* just to be sure */
554 #ifdef INET
555 /*
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.
559 */
560 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
561 #endif
562 /*
563 * Hmm what about the IPSEC stuff that is missing here but in
564 * sctp_attach()?
565 */
566 SCTP_INP_WUNLOCK(inp);
567 return (0);
568 }
569
570 static int
571 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
572 {
573 struct sctp_inpcb *inp;
574 struct in6pcb *inp6;
575 int error;
576
577 inp = (struct sctp_inpcb *)so->so_pcb;
578 if (inp == NULL) {
579 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
580 return (EINVAL);
581 }
582 if (addr) {
583 switch (addr->sa_family) {
584 #ifdef INET
585 case AF_INET:
586 if (addr->sa_len != sizeof(struct sockaddr_in)) {
587 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
588 return (EINVAL);
589 }
590 break;
591 #endif
592 #ifdef INET6
593 case AF_INET6:
594 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
595 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
596 return (EINVAL);
597 }
598 break;
599 #endif
600 default:
601 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
602 return (EINVAL);
603 }
604 }
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) {
610 #ifdef INET
611 case AF_INET:
612 /* binding v4 addr to v6 socket, so reset flags */
613 inp6->inp_vflag |= INP_IPV4;
614 inp6->inp_vflag &= ~INP_IPV6;
615 break;
616 #endif
617 #ifdef INET6
618 case AF_INET6:
619 {
620 struct sockaddr_in6 *sin6_p;
621
622 sin6_p = (struct sockaddr_in6 *)addr;
623
624 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
625 inp6->inp_vflag |= INP_IPV4;
626 }
627 #ifdef INET
628 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
629 struct sockaddr_in sin;
630
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);
635 return (error);
636 }
637 #endif
638 break;
639 }
640 #endif
641 default:
642 break;
643 }
644 } else if (addr != NULL) {
645 struct sockaddr_in6 *sin6_p;
646
647 /* IPV6_V6ONLY socket */
648 #ifdef INET
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);
652 return (EINVAL);
653 }
654 #endif
655 sin6_p = (struct sockaddr_in6 *)addr;
656
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);
661 return (EINVAL);
662 }
663 }
664 error = sctp_inpcb_bind(so, addr, NULL, p);
665 return (error);
666 }
667
668
669 static void
670 sctp6_close(struct socket *so)
671 {
672 sctp_close(so);
673 }
674
675 /* This could be made common with sctp_detach() since they are identical */
676
677 static
678 int
679 sctp6_disconnect(struct socket *so)
680 {
681 return (sctp_disconnect(so));
682 }
683
684
685 int
686 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
687 struct mbuf *control, struct thread *p);
688
689
690 static int
691 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
692 struct mbuf *control, struct thread *p)
693 {
694 struct sctp_inpcb *inp;
695 struct in6pcb *inp6;
696
697 #ifdef INET
698 struct sockaddr_in6 *sin6;
699
700 #endif /* INET */
701 /* No SPL needed since sctp_output does this */
702
703 inp = (struct sctp_inpcb *)so->so_pcb;
704 if (inp == NULL) {
705 if (control) {
706 SCTP_RELEASE_PKT(control);
707 control = NULL;
708 }
709 SCTP_RELEASE_PKT(m);
710 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
711 return (EINVAL);
712 }
713 inp6 = (struct in6pcb *)inp;
714 /*
715 * For the TCP model we may get a NULL addr, if we are a connected
716 * socket thats ok.
717 */
718 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
719 (addr == NULL)) {
720 goto connected_type;
721 }
722 if (addr == NULL) {
723 SCTP_RELEASE_PKT(m);
724 if (control) {
725 SCTP_RELEASE_PKT(control);
726 control = NULL;
727 }
728 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
729 return (EDESTADDRREQ);
730 }
731 #ifdef INET
732 sin6 = (struct sockaddr_in6 *)addr;
733 if (SCTP_IPV6_V6ONLY(inp6)) {
734 /*
735 * if IPV6_V6ONLY flag, we discard datagrams destined to a
736 * v4 addr or v4-mapped addr
737 */
738 if (addr->sa_family == AF_INET) {
739 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
740 return (EINVAL);
741 }
742 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
743 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
744 return (EINVAL);
745 }
746 }
747 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
748 struct sockaddr_in sin;
749
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));
753 }
754 #endif /* INET */
755 connected_type:
756 /* now what about control */
757 if (control) {
758 if (inp->control) {
759 SCTP_PRINTF("huh? control set?\n");
760 SCTP_RELEASE_PKT(inp->control);
761 inp->control = NULL;
762 }
763 inp->control = control;
764 }
765 /* Place the data */
766 if (inp->pkt) {
767 SCTP_BUF_NEXT(inp->pkt_last) = m;
768 inp->pkt_last = m;
769 } else {
770 inp->pkt_last = inp->pkt = m;
771 }
772 if (
773 /* FreeBSD and MacOSX uses a flag passed */
774 ((flags & PRUS_MORETOCOME) == 0)
775 ) {
776 /*
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.
782 */
783 int ret;
784
785 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
786 inp->pkt = NULL;
787 inp->control = NULL;
788 return (ret);
789 } else {
790 return (0);
791 }
792 }
793
794 static int
795 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
796 {
797 uint32_t vrf_id;
798 int error = 0;
799 struct sctp_inpcb *inp;
800 struct sctp_tcb *stcb;
801
802 #ifdef INET
803 struct in6pcb *inp6;
804 struct sockaddr_in6 *sin6;
805 union sctp_sockstore store;
806
807 #endif
808
809 #ifdef INET
810 inp6 = (struct in6pcb *)so->so_pcb;
811 #endif
812 inp = (struct sctp_inpcb *)so->so_pcb;
813 if (inp == NULL) {
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
816 * not setup? */
817 }
818 if (addr == NULL) {
819 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
820 return (EINVAL);
821 }
822 switch (addr->sa_family) {
823 #ifdef INET
824 case AF_INET:
825 if (addr->sa_len != sizeof(struct sockaddr_in)) {
826 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
827 return (EINVAL);
828 }
829 break;
830 #endif
831 #ifdef INET6
832 case AF_INET6:
833 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
834 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
835 return (EINVAL);
836 }
837 break;
838 #endif
839 default:
840 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
841 return (EINVAL);
842 }
843
844 vrf_id = inp->def_vrf_id;
845 SCTP_ASOC_CREATE_LOCK(inp);
846 SCTP_INP_RLOCK(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);
852 if (error) {
853 SCTP_ASOC_CREATE_UNLOCK(inp);
854
855 return (error);
856 }
857 SCTP_INP_RLOCK(inp);
858 }
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);
865 return (EADDRINUSE);
866 }
867 #ifdef INET
868 sin6 = (struct sockaddr_in6 *)addr;
869 if (SCTP_IPV6_V6ONLY(inp6)) {
870 /*
871 * if IPV6_V6ONLY flag, ignore connections destined to a v4
872 * addr or v4-mapped addr
873 */
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);
878 return (EINVAL);
879 }
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);
884 return (EINVAL);
885 }
886 }
887 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
888 /* convert v4-mapped into v4 addr */
889 in6_sin6_2_sin(&store.sin, sin6);
890 addr = &store.sa;
891 }
892 #endif /* INET */
893 /* Now do we connect? */
894 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
895 stcb = LIST_FIRST(&inp->sctp_asoc_list);
896 if (stcb) {
897 SCTP_TCB_UNLOCK(stcb);
898 }
899 SCTP_INP_RUNLOCK(inp);
900 } else {
901 SCTP_INP_RUNLOCK(inp);
902 SCTP_INP_WLOCK(inp);
903 SCTP_INP_INCR_REF(inp);
904 SCTP_INP_WUNLOCK(inp);
905 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
906 if (stcb == NULL) {
907 SCTP_INP_WLOCK(inp);
908 SCTP_INP_DECR_REF(inp);
909 SCTP_INP_WUNLOCK(inp);
910 }
911 }
912
913 if (stcb != NULL) {
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);
918 return (EALREADY);
919 }
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);
925 if (stcb == NULL) {
926 /* Gak! no memory */
927 return (error);
928 }
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 */
932 soisconnecting(so);
933 }
934 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT;
935 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
936
937 /* initialize authentication parameters for the assoc */
938 sctp_initialize_auth_params(inp, stcb);
939
940 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
941 SCTP_TCB_UNLOCK(stcb);
942 return (error);
943 }
944
945 static int
946 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
947 {
948 struct sockaddr_in6 *sin6;
949 struct sctp_inpcb *inp;
950 uint32_t vrf_id;
951 struct sctp_ifa *sctp_ifa;
952
953 int error;
954
955 /*
956 * Do the malloc first in case it blocks.
957 */
958 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
959 if (sin6 == NULL)
960 return (ENOMEM);
961 sin6->sin6_family = AF_INET6;
962 sin6->sin6_len = sizeof(*sin6);
963
964 inp = (struct sctp_inpcb *)so->so_pcb;
965 if (inp == NULL) {
966 SCTP_FREE_SONAME(sin6);
967 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
968 return (ECONNRESET);
969 }
970 SCTP_INP_RLOCK(inp);
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;
978 int fnd;
979
980 stcb = LIST_FIRST(&inp->sctp_asoc_list);
981 if (stcb == NULL) {
982 SCTP_INP_RUNLOCK(inp);
983 SCTP_FREE_SONAME(sin6);
984 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
985 return (ENOENT);
986 }
987 fnd = 0;
988 sin_a6 = NULL;
989 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
990 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
991 if (sin_a6 == NULL)
992 /* this will make coverity happy */
993 continue;
994
995 if (sin_a6->sin6_family == AF_INET6) {
996 fnd = 1;
997 break;
998 }
999 }
1000 if ((!fnd) || (sin_a6 == NULL)) {
1001 /* punt */
1002 SCTP_INP_RUNLOCK(inp);
1003 SCTP_FREE_SONAME(sin6);
1004 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1005 return (ENOENT);
1006 }
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);
1009 if (sctp_ifa) {
1010 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
1011 }
1012 } else {
1013 /* For the bound all case you get back 0 */
1014 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
1015 }
1016 } else {
1017 /* Take the first IPv6 address in the list */
1018 struct sctp_laddr *laddr;
1019 int fnd = 0;
1020
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;
1024
1025 sin_a = &laddr->ifa->address.sin6;
1026 sin6->sin6_addr = sin_a->sin6_addr;
1027 fnd = 1;
1028 break;
1029 }
1030 }
1031 if (!fnd) {
1032 SCTP_FREE_SONAME(sin6);
1033 SCTP_INP_RUNLOCK(inp);
1034 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1035 return (ENOENT);
1036 }
1037 }
1038 SCTP_INP_RUNLOCK(inp);
1039 /* Scoping things for v6 */
1040 if ((error = sa6_recoverscope(sin6)) != 0) {
1041 SCTP_FREE_SONAME(sin6);
1042 return (error);
1043 }
1044 (*addr) = (struct sockaddr *)sin6;
1045 return (0);
1046 }
1047
1048 static int
1049 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1050 {
1051 struct sockaddr_in6 *sin6;
1052 int fnd;
1053 struct sockaddr_in6 *sin_a6;
1054 struct sctp_inpcb *inp;
1055 struct sctp_tcb *stcb;
1056 struct sctp_nets *net;
1057 int error;
1058
1059 /* Do the malloc first in case it blocks. */
1060 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1061 if (sin6 == NULL)
1062 return (ENOMEM);
1063 sin6->sin6_family = AF_INET6;
1064 sin6->sin6_len = sizeof(*sin6);
1065
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);
1072 return (ENOTCONN);
1073 }
1074 SCTP_INP_RLOCK(inp);
1075 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1076 if (stcb) {
1077 SCTP_TCB_LOCK(stcb);
1078 }
1079 SCTP_INP_RUNLOCK(inp);
1080 if (stcb == NULL) {
1081 SCTP_FREE_SONAME(sin6);
1082 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1083 return (ECONNRESET);
1084 }
1085 fnd = 0;
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) {
1089 fnd = 1;
1090 sin6->sin6_port = stcb->rport;
1091 sin6->sin6_addr = sin_a6->sin6_addr;
1092 break;
1093 }
1094 }
1095 SCTP_TCB_UNLOCK(stcb);
1096 if (!fnd) {
1097 /* No IPv4 address */
1098 SCTP_FREE_SONAME(sin6);
1099 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1100 return (ENOENT);
1101 }
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);
1105 return (error);
1106 }
1107 *addr = (struct sockaddr *)sin6;
1108 return (0);
1109 }
1110
1111 static int
1112 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1113 {
1114 struct in6pcb *inp6 = sotoin6pcb(so);
1115 int error;
1116
1117 if (inp6 == NULL) {
1118 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1119 return (EINVAL);
1120 }
1121 /* allow v6 addresses precedence */
1122 error = sctp6_getaddr(so, nam);
1123 #ifdef INET
1124 if (error) {
1125 struct sockaddr_in6 *sin6;
1126
1127 /* try v4 next if v6 failed */
1128 error = sctp_ingetaddr(so, nam);
1129 if (error) {
1130 return (error);
1131 }
1132 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1133 if (sin6 == NULL) {
1134 SCTP_FREE_SONAME(*nam);
1135 return (ENOMEM);
1136 }
1137 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1138 SCTP_FREE_SONAME(*nam);
1139 *nam = (struct sockaddr *)sin6;
1140 }
1141 #endif
1142 return (error);
1143 }
1144
1145
1146 static int
1147 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1148 {
1149 struct in6pcb *inp6 = sotoin6pcb(so);
1150 int error;
1151
1152 if (inp6 == NULL) {
1153 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1154 return (EINVAL);
1155 }
1156 /* allow v6 addresses precedence */
1157 error = sctp6_peeraddr(so, nam);
1158 #ifdef INET
1159 if (error) {
1160 struct sockaddr_in6 *sin6;
1161
1162 /* try v4 next if v6 failed */
1163 error = sctp_peeraddr(so, nam);
1164 if (error) {
1165 return (error);
1166 }
1167 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1168 if (sin6 == NULL) {
1169 SCTP_FREE_SONAME(*nam);
1170 return (ENOMEM);
1171 }
1172 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1173 SCTP_FREE_SONAME(*nam);
1174 *nam = (struct sockaddr *)sin6;
1175 }
1176 #endif
1177 return (error);
1178 }
1179
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
1199 };
1200
1201 #endif
Cache object: 1f7d9e493c0bfaf66f968bf9df06f470
|