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/9.2/sys/netinet6/sctp6_usrreq.c 252971 2013-07-07 16:51:17Z 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 #ifdef INET6
43 #include <netinet6/sctp6_var.h>
44 #endif
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/udp.h>
58
59 #ifdef IPSEC
60 #include <netipsec/ipsec.h>
61 #ifdef INET6
62 #include <netipsec/ipsec6.h>
63 #endif /* INET6 */
64 #endif /* IPSEC */
65
66 extern struct protosw inetsw[];
67
68 int
69 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port)
70 {
71 struct mbuf *m;
72 int iphlen;
73 uint32_t vrf_id;
74 uint8_t ecn_bits;
75 struct sockaddr_in6 src, dst;
76 struct ip6_hdr *ip6;
77 struct sctphdr *sh;
78 struct sctp_chunkhdr *ch;
79 int length, offset;
80
81 #if !defined(SCTP_WITH_NO_CSUM)
82 uint8_t compute_crc;
83
84 #endif
85 uint32_t mflowid;
86 uint8_t use_mflowid;
87
88 iphlen = *offp;
89 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) {
90 SCTP_RELEASE_PKT(*i_pak);
91 return (IPPROTO_DONE);
92 }
93 m = SCTP_HEADER_TO_CHAIN(*i_pak);
94 #ifdef SCTP_MBUF_LOGGING
95 /* Log in any input mbufs */
96 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
97 struct mbuf *mat;
98
99 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
100 if (SCTP_BUF_IS_EXTENDED(mat)) {
101 sctp_log_mb(mat, SCTP_MBUF_INPUT);
102 }
103 }
104 }
105 #endif
106 #ifdef SCTP_PACKET_LOGGING
107 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
108 sctp_packet_log(m);
109 }
110 #endif
111 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
112 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%x.\n",
113 m->m_pkthdr.len,
114 if_name(m->m_pkthdr.rcvif),
115 m->m_pkthdr.csum_flags);
116 if (m->m_flags & M_FLOWID) {
117 mflowid = m->m_pkthdr.flowid;
118 use_mflowid = 1;
119 } else {
120 mflowid = 0;
121 use_mflowid = 0;
122 }
123 SCTP_STAT_INCR(sctps_recvpackets);
124 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
125 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
126 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
127 ip6 = mtod(m, struct ip6_hdr *);
128 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen,
129 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)));
130 if (sh == NULL) {
131 SCTP_STAT_INCR(sctps_hdrops);
132 return (IPPROTO_DONE);
133 }
134 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
135 offset -= sizeof(struct sctp_chunkhdr);
136 memset(&src, 0, sizeof(struct sockaddr_in6));
137 src.sin6_family = AF_INET6;
138 src.sin6_len = sizeof(struct sockaddr_in6);
139 src.sin6_port = sh->src_port;
140 src.sin6_addr = ip6->ip6_src;
141 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
142 goto out;
143 }
144 memset(&dst, 0, sizeof(struct sockaddr_in6));
145 dst.sin6_family = AF_INET6;
146 dst.sin6_len = sizeof(struct sockaddr_in6);
147 dst.sin6_port = sh->dest_port;
148 dst.sin6_addr = ip6->ip6_dst;
149 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
150 goto out;
151 }
152 if (faithprefix_p != NULL && (*faithprefix_p) (&dst.sin6_addr)) {
153 /* XXX send icmp6 host/port unreach? */
154 goto out;
155 }
156 length = ntohs(ip6->ip6_plen) + iphlen;
157 /* Validate mbuf chain length with IP payload length. */
158 if (SCTP_HEADER_LEN(m) != length) {
159 SCTPDBG(SCTP_DEBUG_INPUT1,
160 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
161 SCTP_STAT_INCR(sctps_hdrops);
162 goto out;
163 }
164 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
165 goto out;
166 }
167 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
168 #if defined(SCTP_WITH_NO_CSUM)
169 SCTP_STAT_INCR(sctps_recvnocrc);
170 #else
171 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
172 SCTP_STAT_INCR(sctps_recvhwcrc);
173 compute_crc = 0;
174 } else {
175 SCTP_STAT_INCR(sctps_recvswcrc);
176 compute_crc = 1;
177 }
178 #endif
179 sctp_common_input_processing(&m, iphlen, offset, length,
180 (struct sockaddr *)&src,
181 (struct sockaddr *)&dst,
182 sh, ch,
183 #if !defined(SCTP_WITH_NO_CSUM)
184 compute_crc,
185 #endif
186 ecn_bits,
187 use_mflowid, mflowid,
188 vrf_id, port);
189 out:
190 if (m) {
191 sctp_m_freem(m);
192 }
193 return (IPPROTO_DONE);
194 }
195
196
197 int
198 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
199 {
200 return (sctp6_input_with_port(i_pak, offp, 0));
201 }
202
203 static void
204 sctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6,
205 struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net)
206 {
207 uint32_t nxtsz;
208
209 if ((inp == NULL) || (stcb == NULL) || (net == NULL) ||
210 (icmp6 == NULL) || (sh == NULL)) {
211 goto out;
212 }
213 /* First do we even look at it? */
214 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag))
215 goto out;
216
217 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) {
218 /* not PACKET TO BIG */
219 goto out;
220 }
221 /*
222 * ok we need to look closely. We could even get smarter and look at
223 * anyone that we sent to in case we get a different ICMP that tells
224 * us there is no way to reach a host, but for this impl, all we
225 * care about is MTU discovery.
226 */
227 nxtsz = ntohl(icmp6->icmp6_mtu);
228 /* Stop any PMTU timer */
229 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1);
230
231 /* Adjust destination size limit */
232 if (net->mtu > nxtsz) {
233 net->mtu = nxtsz;
234 if (net->port) {
235 net->mtu -= sizeof(struct udphdr);
236 }
237 }
238 /* now what about the ep? */
239 if (stcb->asoc.smallest_mtu > nxtsz) {
240 struct sctp_tmit_chunk *chk;
241
242 /* Adjust that too */
243 stcb->asoc.smallest_mtu = nxtsz;
244 /* now off to subtract IP_DF flag if needed */
245
246 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) {
247 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) {
248 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
249 }
250 }
251 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
252 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) {
253 /*
254 * For this guy we also mark for immediate
255 * resend since we sent to big of chunk
256 */
257 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
258 if (chk->sent != SCTP_DATAGRAM_RESEND)
259 stcb->asoc.sent_queue_retran_cnt++;
260 chk->sent = SCTP_DATAGRAM_RESEND;
261 chk->rec.data.doing_fast_retransmit = 0;
262
263 chk->sent = SCTP_DATAGRAM_RESEND;
264 /* Clear any time so NO RTT is being done */
265 chk->sent_rcv_time.tv_sec = 0;
266 chk->sent_rcv_time.tv_usec = 0;
267 stcb->asoc.total_flight -= chk->send_size;
268 net->flight_size -= chk->send_size;
269 }
270 }
271 }
272 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL);
273 out:
274 if (stcb) {
275 SCTP_TCB_UNLOCK(stcb);
276 }
277 }
278
279
280 void
281 sctp6_notify(struct sctp_inpcb *inp,
282 struct icmp6_hdr *icmph,
283 struct sctphdr *sh,
284 struct sockaddr *to,
285 struct sctp_tcb *stcb,
286 struct sctp_nets *net)
287 {
288 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
289 struct socket *so;
290
291 #endif
292
293 /* protection */
294 if ((inp == NULL) || (stcb == NULL) || (net == NULL) ||
295 (sh == NULL) || (to == NULL)) {
296 if (stcb)
297 SCTP_TCB_UNLOCK(stcb);
298 return;
299 }
300 /* First job is to verify the vtag matches what I would send */
301 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) {
302 SCTP_TCB_UNLOCK(stcb);
303 return;
304 }
305 if (icmph->icmp6_type != ICMP_UNREACH) {
306 /* We only care about unreachable */
307 SCTP_TCB_UNLOCK(stcb);
308 return;
309 }
310 if ((icmph->icmp6_code == ICMP_UNREACH_NET) ||
311 (icmph->icmp6_code == ICMP_UNREACH_HOST) ||
312 (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) ||
313 (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) ||
314 (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) ||
315 (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) ||
316 (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) ||
317 (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) {
318
319 /*
320 * Hmm reachablity problems we must examine closely. If its
321 * not reachable, we may have lost a network. Or if there is
322 * NO protocol at the other end named SCTP. well we consider
323 * it a OOTB abort.
324 */
325 if (net->dest_state & SCTP_ADDR_REACHABLE) {
326 /* Ok that destination is NOT reachable */
327 net->dest_state &= ~SCTP_ADDR_REACHABLE;
328 net->dest_state &= ~SCTP_ADDR_PF;
329 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
330 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
331 }
332 SCTP_TCB_UNLOCK(stcb);
333 } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) ||
334 (icmph->icmp6_code == ICMP_UNREACH_PORT)) {
335 /*
336 * Here the peer is either playing tricks on us, including
337 * an address that belongs to someone who does not support
338 * SCTP OR was a userland implementation that shutdown and
339 * now is dead. In either case treat it like a OOTB abort
340 * with no TCB
341 */
342 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED);
343 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
344 so = SCTP_INP_SO(inp);
345 atomic_add_int(&stcb->asoc.refcnt, 1);
346 SCTP_TCB_UNLOCK(stcb);
347 SCTP_SOCKET_LOCK(so, 1);
348 SCTP_TCB_LOCK(stcb);
349 atomic_subtract_int(&stcb->asoc.refcnt, 1);
350 #endif
351 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2);
352 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
353 SCTP_SOCKET_UNLOCK(so, 1);
354 /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */
355 #endif
356 /* no need to unlock here, since the TCB is gone */
357 } else {
358 SCTP_TCB_UNLOCK(stcb);
359 }
360 }
361
362
363
364 void
365 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
366 {
367 struct sctphdr sh;
368 struct ip6ctlparam *ip6cp = NULL;
369 uint32_t vrf_id;
370
371 vrf_id = SCTP_DEFAULT_VRFID;
372
373 if (pktdst->sa_family != AF_INET6 ||
374 pktdst->sa_len != sizeof(struct sockaddr_in6))
375 return;
376
377 if ((unsigned)cmd >= PRC_NCMDS)
378 return;
379 if (PRC_IS_REDIRECT(cmd)) {
380 d = NULL;
381 } else if (inet6ctlerrmap[cmd] == 0) {
382 return;
383 }
384 /* if the parameter is from icmp6, decode it. */
385 if (d != NULL) {
386 ip6cp = (struct ip6ctlparam *)d;
387 } else {
388 ip6cp = (struct ip6ctlparam *)NULL;
389 }
390
391 if (ip6cp) {
392 /*
393 * XXX: We assume that when IPV6 is non NULL, M and OFF are
394 * valid.
395 */
396 /* check if we can safely examine src and dst ports */
397 struct sctp_inpcb *inp = NULL;
398 struct sctp_tcb *stcb = NULL;
399 struct sctp_nets *net = NULL;
400 struct sockaddr_in6 final;
401
402 if (ip6cp->ip6c_m == NULL)
403 return;
404
405 bzero(&sh, sizeof(sh));
406 bzero(&final, sizeof(final));
407 inp = NULL;
408 net = NULL;
409 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh),
410 (caddr_t)&sh);
411 ip6cp->ip6c_src->sin6_port = sh.src_port;
412 final.sin6_len = sizeof(final);
413 final.sin6_family = AF_INET6;
414 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr;
415 final.sin6_port = sh.dest_port;
416 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&final,
417 (struct sockaddr *)ip6cp->ip6c_src,
418 &inp, &net, 1, vrf_id);
419 /* inp's ref-count increased && stcb locked */
420 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) {
421 if (cmd == PRC_MSGSIZE) {
422 sctp6_notify_mbuf(inp,
423 ip6cp->ip6c_icmp6,
424 &sh,
425 stcb,
426 net);
427 /* inp's ref-count reduced && stcb unlocked */
428 } else {
429 sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh,
430 (struct sockaddr *)&final,
431 stcb, net);
432 /* inp's ref-count reduced && stcb unlocked */
433 }
434 } else {
435 if (PRC_IS_REDIRECT(cmd) && inp) {
436 in6_rtchange((struct in6pcb *)inp,
437 inet6ctlerrmap[cmd]);
438 }
439 if (inp) {
440 /* reduce inp's ref-count */
441 SCTP_INP_WLOCK(inp);
442 SCTP_INP_DECR_REF(inp);
443 SCTP_INP_WUNLOCK(inp);
444 }
445 if (stcb)
446 SCTP_TCB_UNLOCK(stcb);
447 }
448 }
449 }
450
451 /*
452 * this routine can probably be collasped into the one in sctp_userreq.c
453 * since they do the same thing and now we lookup with a sockaddr
454 */
455 static int
456 sctp6_getcred(SYSCTL_HANDLER_ARGS)
457 {
458 struct xucred xuc;
459 struct sockaddr_in6 addrs[2];
460 struct sctp_inpcb *inp;
461 struct sctp_nets *net;
462 struct sctp_tcb *stcb;
463 int error;
464 uint32_t vrf_id;
465
466 vrf_id = SCTP_DEFAULT_VRFID;
467
468 error = priv_check(req->td, PRIV_NETINET_GETCRED);
469 if (error)
470 return (error);
471
472 if (req->newlen != sizeof(addrs)) {
473 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
474 return (EINVAL);
475 }
476 if (req->oldlen != sizeof(struct ucred)) {
477 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
478 return (EINVAL);
479 }
480 error = SYSCTL_IN(req, addrs, sizeof(addrs));
481 if (error)
482 return (error);
483
484 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
485 sin6tosa(&addrs[0]),
486 &inp, &net, 1, vrf_id);
487 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
488 if ((inp != NULL) && (stcb == NULL)) {
489 /* reduce ref-count */
490 SCTP_INP_WLOCK(inp);
491 SCTP_INP_DECR_REF(inp);
492 goto cred_can_cont;
493 }
494 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
495 error = ENOENT;
496 goto out;
497 }
498 SCTP_TCB_UNLOCK(stcb);
499 /*
500 * We use the write lock here, only since in the error leg we need
501 * it. If we used RLOCK, then we would have to
502 * wlock/decr/unlock/rlock. Which in theory could create a hole.
503 * Better to use higher wlock.
504 */
505 SCTP_INP_WLOCK(inp);
506 cred_can_cont:
507 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
508 if (error) {
509 SCTP_INP_WUNLOCK(inp);
510 goto out;
511 }
512 cru2x(inp->sctp_socket->so_cred, &xuc);
513 SCTP_INP_WUNLOCK(inp);
514 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
515 out:
516 return (error);
517 }
518
519 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
520 0, 0,
521 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
522
523
524 /* This is the same as the sctp_abort() could be made common */
525 static void
526 sctp6_abort(struct socket *so)
527 {
528 struct sctp_inpcb *inp;
529 uint32_t flags;
530
531 inp = (struct sctp_inpcb *)so->so_pcb;
532 if (inp == NULL) {
533 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
534 return;
535 }
536 sctp_must_try_again:
537 flags = inp->sctp_flags;
538 #ifdef SCTP_LOG_CLOSING
539 sctp_log_closing(inp, NULL, 17);
540 #endif
541 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
542 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
543 #ifdef SCTP_LOG_CLOSING
544 sctp_log_closing(inp, NULL, 16);
545 #endif
546 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
547 SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
548 SOCK_LOCK(so);
549 SCTP_SB_CLEAR(so->so_snd);
550 /*
551 * same for the rcv ones, they are only here for the
552 * accounting/select.
553 */
554 SCTP_SB_CLEAR(so->so_rcv);
555 /* Now null out the reference, we are completely detached. */
556 so->so_pcb = NULL;
557 SOCK_UNLOCK(so);
558 } else {
559 flags = inp->sctp_flags;
560 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
561 goto sctp_must_try_again;
562 }
563 }
564 return;
565 }
566
567 static int
568 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
569 {
570 struct in6pcb *inp6;
571 int error;
572 struct sctp_inpcb *inp;
573 uint32_t vrf_id = SCTP_DEFAULT_VRFID;
574
575 inp = (struct sctp_inpcb *)so->so_pcb;
576 if (inp != NULL) {
577 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
578 return (EINVAL);
579 }
580 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
581 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
582 if (error)
583 return (error);
584 }
585 error = sctp_inpcb_alloc(so, vrf_id);
586 if (error)
587 return (error);
588 inp = (struct sctp_inpcb *)so->so_pcb;
589 SCTP_INP_WLOCK(inp);
590 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */
591 inp6 = (struct in6pcb *)inp;
592
593 inp6->inp_vflag |= INP_IPV6;
594 inp6->in6p_hops = -1; /* use kernel default */
595 inp6->in6p_cksum = -1; /* just to be sure */
596 #ifdef INET
597 /*
598 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
599 * socket as well, because the socket may be bound to an IPv6
600 * wildcard address, which may match an IPv4-mapped IPv6 address.
601 */
602 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
603 #endif
604 /*
605 * Hmm what about the IPSEC stuff that is missing here but in
606 * sctp_attach()?
607 */
608 SCTP_INP_WUNLOCK(inp);
609 return (0);
610 }
611
612 static int
613 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
614 {
615 struct sctp_inpcb *inp;
616 struct in6pcb *inp6;
617 int error;
618
619 inp = (struct sctp_inpcb *)so->so_pcb;
620 if (inp == NULL) {
621 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
622 return (EINVAL);
623 }
624 if (addr) {
625 switch (addr->sa_family) {
626 #ifdef INET
627 case AF_INET:
628 if (addr->sa_len != sizeof(struct sockaddr_in)) {
629 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
630 return (EINVAL);
631 }
632 break;
633 #endif
634 #ifdef INET6
635 case AF_INET6:
636 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
637 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
638 return (EINVAL);
639 }
640 break;
641 #endif
642 default:
643 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
644 return (EINVAL);
645 }
646 }
647 inp6 = (struct in6pcb *)inp;
648 inp6->inp_vflag &= ~INP_IPV4;
649 inp6->inp_vflag |= INP_IPV6;
650 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) {
651 switch (addr->sa_family) {
652 #ifdef INET
653 case AF_INET:
654 /* binding v4 addr to v6 socket, so reset flags */
655 inp6->inp_vflag |= INP_IPV4;
656 inp6->inp_vflag &= ~INP_IPV6;
657 break;
658 #endif
659 #ifdef INET6
660 case AF_INET6:
661 {
662 struct sockaddr_in6 *sin6_p;
663
664 sin6_p = (struct sockaddr_in6 *)addr;
665
666 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
667 inp6->inp_vflag |= INP_IPV4;
668 }
669 #ifdef INET
670 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
671 struct sockaddr_in sin;
672
673 in6_sin6_2_sin(&sin, sin6_p);
674 inp6->inp_vflag |= INP_IPV4;
675 inp6->inp_vflag &= ~INP_IPV6;
676 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
677 return (error);
678 }
679 #endif
680 break;
681 }
682 #endif
683 default:
684 break;
685 }
686 } else if (addr != NULL) {
687 struct sockaddr_in6 *sin6_p;
688
689 /* IPV6_V6ONLY socket */
690 #ifdef INET
691 if (addr->sa_family == AF_INET) {
692 /* can't bind v4 addr to v6 only socket! */
693 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
694 return (EINVAL);
695 }
696 #endif
697 sin6_p = (struct sockaddr_in6 *)addr;
698
699 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
700 /* can't bind v4-mapped addrs either! */
701 /* NOTE: we don't support SIIT */
702 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
703 return (EINVAL);
704 }
705 }
706 error = sctp_inpcb_bind(so, addr, NULL, p);
707 return (error);
708 }
709
710
711 static void
712 sctp6_close(struct socket *so)
713 {
714 sctp_close(so);
715 }
716
717 /* This could be made common with sctp_detach() since they are identical */
718
719 static
720 int
721 sctp6_disconnect(struct socket *so)
722 {
723 return (sctp_disconnect(so));
724 }
725
726
727 int
728 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
729 struct mbuf *control, struct thread *p);
730
731
732 static int
733 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
734 struct mbuf *control, struct thread *p)
735 {
736 struct sctp_inpcb *inp;
737 struct in6pcb *inp6;
738
739 #ifdef INET
740 struct sockaddr_in6 *sin6;
741
742 #endif /* INET */
743 /* No SPL needed since sctp_output does this */
744
745 inp = (struct sctp_inpcb *)so->so_pcb;
746 if (inp == NULL) {
747 if (control) {
748 SCTP_RELEASE_PKT(control);
749 control = NULL;
750 }
751 SCTP_RELEASE_PKT(m);
752 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
753 return (EINVAL);
754 }
755 inp6 = (struct in6pcb *)inp;
756 /*
757 * For the TCP model we may get a NULL addr, if we are a connected
758 * socket thats ok.
759 */
760 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
761 (addr == NULL)) {
762 goto connected_type;
763 }
764 if (addr == NULL) {
765 SCTP_RELEASE_PKT(m);
766 if (control) {
767 SCTP_RELEASE_PKT(control);
768 control = NULL;
769 }
770 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
771 return (EDESTADDRREQ);
772 }
773 #ifdef INET
774 sin6 = (struct sockaddr_in6 *)addr;
775 if (SCTP_IPV6_V6ONLY(inp6)) {
776 /*
777 * if IPV6_V6ONLY flag, we discard datagrams destined to a
778 * v4 addr or v4-mapped addr
779 */
780 if (addr->sa_family == AF_INET) {
781 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
782 return (EINVAL);
783 }
784 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
785 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
786 return (EINVAL);
787 }
788 }
789 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
790 struct sockaddr_in sin;
791
792 /* convert v4-mapped into v4 addr and send */
793 in6_sin6_2_sin(&sin, sin6);
794 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
795 }
796 #endif /* INET */
797 connected_type:
798 /* now what about control */
799 if (control) {
800 if (inp->control) {
801 SCTP_PRINTF("huh? control set?\n");
802 SCTP_RELEASE_PKT(inp->control);
803 inp->control = NULL;
804 }
805 inp->control = control;
806 }
807 /* Place the data */
808 if (inp->pkt) {
809 SCTP_BUF_NEXT(inp->pkt_last) = m;
810 inp->pkt_last = m;
811 } else {
812 inp->pkt_last = inp->pkt = m;
813 }
814 if (
815 /* FreeBSD and MacOSX uses a flag passed */
816 ((flags & PRUS_MORETOCOME) == 0)
817 ) {
818 /*
819 * note with the current version this code will only be used
820 * by OpenBSD, NetBSD and FreeBSD have methods for
821 * re-defining sosend() to use sctp_sosend(). One can
822 * optionaly switch back to this code (by changing back the
823 * defininitions but this is not advisable.
824 */
825 int ret;
826
827 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
828 inp->pkt = NULL;
829 inp->control = NULL;
830 return (ret);
831 } else {
832 return (0);
833 }
834 }
835
836 static int
837 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
838 {
839 uint32_t vrf_id;
840 int error = 0;
841 struct sctp_inpcb *inp;
842 struct in6pcb *inp6;
843 struct sctp_tcb *stcb;
844
845 #ifdef INET
846 struct sockaddr_in6 *sin6;
847 struct sockaddr_storage ss;
848
849 #endif
850
851 inp6 = (struct in6pcb *)so->so_pcb;
852 inp = (struct sctp_inpcb *)so->so_pcb;
853 if (inp == NULL) {
854 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
855 return (ECONNRESET); /* I made the same as TCP since we are
856 * not setup? */
857 }
858 if (addr == NULL) {
859 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
860 return (EINVAL);
861 }
862 switch (addr->sa_family) {
863 #ifdef INET
864 case AF_INET:
865 if (addr->sa_len != sizeof(struct sockaddr_in)) {
866 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
867 return (EINVAL);
868 }
869 break;
870 #endif
871 #ifdef INET6
872 case AF_INET6:
873 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
874 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
875 return (EINVAL);
876 }
877 break;
878 #endif
879 default:
880 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
881 return (EINVAL);
882 }
883
884 vrf_id = inp->def_vrf_id;
885 SCTP_ASOC_CREATE_LOCK(inp);
886 SCTP_INP_RLOCK(inp);
887 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
888 SCTP_PCB_FLAGS_UNBOUND) {
889 /* Bind a ephemeral port */
890 SCTP_INP_RUNLOCK(inp);
891 error = sctp6_bind(so, NULL, p);
892 if (error) {
893 SCTP_ASOC_CREATE_UNLOCK(inp);
894
895 return (error);
896 }
897 SCTP_INP_RLOCK(inp);
898 }
899 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
900 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
901 /* We are already connected AND the TCP model */
902 SCTP_INP_RUNLOCK(inp);
903 SCTP_ASOC_CREATE_UNLOCK(inp);
904 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
905 return (EADDRINUSE);
906 }
907 #ifdef INET
908 sin6 = (struct sockaddr_in6 *)addr;
909 if (SCTP_IPV6_V6ONLY(inp6)) {
910 /*
911 * if IPV6_V6ONLY flag, ignore connections destined to a v4
912 * addr or v4-mapped addr
913 */
914 if (addr->sa_family == AF_INET) {
915 SCTP_INP_RUNLOCK(inp);
916 SCTP_ASOC_CREATE_UNLOCK(inp);
917 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
918 return (EINVAL);
919 }
920 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
921 SCTP_INP_RUNLOCK(inp);
922 SCTP_ASOC_CREATE_UNLOCK(inp);
923 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
924 return (EINVAL);
925 }
926 }
927 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
928 /* convert v4-mapped into v4 addr */
929 in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6);
930 addr = (struct sockaddr *)&ss;
931 }
932 #endif /* INET */
933 /* Now do we connect? */
934 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
935 stcb = LIST_FIRST(&inp->sctp_asoc_list);
936 if (stcb) {
937 SCTP_TCB_UNLOCK(stcb);
938 }
939 SCTP_INP_RUNLOCK(inp);
940 } else {
941 SCTP_INP_RUNLOCK(inp);
942 SCTP_INP_WLOCK(inp);
943 SCTP_INP_INCR_REF(inp);
944 SCTP_INP_WUNLOCK(inp);
945 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
946 if (stcb == NULL) {
947 SCTP_INP_WLOCK(inp);
948 SCTP_INP_DECR_REF(inp);
949 SCTP_INP_WUNLOCK(inp);
950 }
951 }
952
953 if (stcb != NULL) {
954 /* Already have or am bring up an association */
955 SCTP_ASOC_CREATE_UNLOCK(inp);
956 SCTP_TCB_UNLOCK(stcb);
957 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
958 return (EALREADY);
959 }
960 /* We are GOOD to go */
961 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, p);
962 SCTP_ASOC_CREATE_UNLOCK(inp);
963 if (stcb == NULL) {
964 /* Gak! no memory */
965 return (error);
966 }
967 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
968 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
969 /* Set the connected flag so we can queue data */
970 soisconnecting(so);
971 }
972 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT;
973 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
974
975 /* initialize authentication parameters for the assoc */
976 sctp_initialize_auth_params(inp, stcb);
977
978 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
979 SCTP_TCB_UNLOCK(stcb);
980 return (error);
981 }
982
983 static int
984 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
985 {
986 struct sockaddr_in6 *sin6;
987 struct sctp_inpcb *inp;
988 uint32_t vrf_id;
989 struct sctp_ifa *sctp_ifa;
990
991 int error;
992
993 /*
994 * Do the malloc first in case it blocks.
995 */
996 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
997 if (sin6 == NULL)
998 return (ENOMEM);
999 sin6->sin6_family = AF_INET6;
1000 sin6->sin6_len = sizeof(*sin6);
1001
1002 inp = (struct sctp_inpcb *)so->so_pcb;
1003 if (inp == NULL) {
1004 SCTP_FREE_SONAME(sin6);
1005 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1006 return (ECONNRESET);
1007 }
1008 SCTP_INP_RLOCK(inp);
1009 sin6->sin6_port = inp->sctp_lport;
1010 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1011 /* For the bound all case you get back 0 */
1012 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
1013 struct sctp_tcb *stcb;
1014 struct sockaddr_in6 *sin_a6;
1015 struct sctp_nets *net;
1016 int fnd;
1017
1018 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1019 if (stcb == NULL) {
1020 goto notConn6;
1021 }
1022 fnd = 0;
1023 sin_a6 = NULL;
1024 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1025 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1026 if (sin_a6 == NULL)
1027 /* this will make coverity happy */
1028 continue;
1029
1030 if (sin_a6->sin6_family == AF_INET6) {
1031 fnd = 1;
1032 break;
1033 }
1034 }
1035 if ((!fnd) || (sin_a6 == NULL)) {
1036 /* punt */
1037 goto notConn6;
1038 }
1039 vrf_id = inp->def_vrf_id;
1040 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id);
1041 if (sctp_ifa) {
1042 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
1043 }
1044 } else {
1045 /* For the bound all case you get back 0 */
1046 notConn6:
1047 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
1048 }
1049 } else {
1050 /* Take the first IPv6 address in the list */
1051 struct sctp_laddr *laddr;
1052 int fnd = 0;
1053
1054 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1055 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
1056 struct sockaddr_in6 *sin_a;
1057
1058 sin_a = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1059 sin6->sin6_addr = sin_a->sin6_addr;
1060 fnd = 1;
1061 break;
1062 }
1063 }
1064 if (!fnd) {
1065 SCTP_FREE_SONAME(sin6);
1066 SCTP_INP_RUNLOCK(inp);
1067 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1068 return (ENOENT);
1069 }
1070 }
1071 SCTP_INP_RUNLOCK(inp);
1072 /* Scoping things for v6 */
1073 if ((error = sa6_recoverscope(sin6)) != 0) {
1074 SCTP_FREE_SONAME(sin6);
1075 return (error);
1076 }
1077 (*addr) = (struct sockaddr *)sin6;
1078 return (0);
1079 }
1080
1081 static int
1082 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1083 {
1084 struct sockaddr_in6 *sin6;
1085 int fnd;
1086 struct sockaddr_in6 *sin_a6;
1087 struct sctp_inpcb *inp;
1088 struct sctp_tcb *stcb;
1089 struct sctp_nets *net;
1090 int error;
1091
1092 /* Do the malloc first in case it blocks. */
1093 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1094 if (sin6 == NULL)
1095 return (ENOMEM);
1096 sin6->sin6_family = AF_INET6;
1097 sin6->sin6_len = sizeof(*sin6);
1098
1099 inp = (struct sctp_inpcb *)so->so_pcb;
1100 if ((inp == NULL) ||
1101 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
1102 /* UDP type and listeners will drop out here */
1103 SCTP_FREE_SONAME(sin6);
1104 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
1105 return (ENOTCONN);
1106 }
1107 SCTP_INP_RLOCK(inp);
1108 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1109 if (stcb) {
1110 SCTP_TCB_LOCK(stcb);
1111 }
1112 SCTP_INP_RUNLOCK(inp);
1113 if (stcb == NULL) {
1114 SCTP_FREE_SONAME(sin6);
1115 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1116 return (ECONNRESET);
1117 }
1118 fnd = 0;
1119 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1120 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1121 if (sin_a6->sin6_family == AF_INET6) {
1122 fnd = 1;
1123 sin6->sin6_port = stcb->rport;
1124 sin6->sin6_addr = sin_a6->sin6_addr;
1125 break;
1126 }
1127 }
1128 SCTP_TCB_UNLOCK(stcb);
1129 if (!fnd) {
1130 /* No IPv4 address */
1131 SCTP_FREE_SONAME(sin6);
1132 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1133 return (ENOENT);
1134 }
1135 if ((error = sa6_recoverscope(sin6)) != 0)
1136 return (error);
1137 *addr = (struct sockaddr *)sin6;
1138 return (0);
1139 }
1140
1141 static int
1142 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1143 {
1144 #ifdef INET
1145 struct sockaddr *addr;
1146
1147 #endif
1148 struct in6pcb *inp6 = sotoin6pcb(so);
1149 int error;
1150
1151 if (inp6 == NULL) {
1152 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1153 return (EINVAL);
1154 }
1155 /* allow v6 addresses precedence */
1156 error = sctp6_getaddr(so, nam);
1157 #ifdef INET
1158 if (error) {
1159 /* try v4 next if v6 failed */
1160 error = sctp_ingetaddr(so, nam);
1161 if (error) {
1162 return (error);
1163 }
1164 addr = *nam;
1165 /* if I'm V6ONLY, convert it to v4-mapped */
1166 if (SCTP_IPV6_V6ONLY(inp6)) {
1167 struct sockaddr_in6 sin6;
1168
1169 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6);
1170 memcpy(addr, &sin6, sizeof(struct sockaddr_in6));
1171 }
1172 }
1173 #endif
1174 return (error);
1175 }
1176
1177
1178 static int
1179 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1180 {
1181 #ifdef INET
1182 struct sockaddr *addr;
1183
1184 #endif
1185 struct in6pcb *inp6 = sotoin6pcb(so);
1186 int error;
1187
1188 if (inp6 == NULL) {
1189 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1190 return (EINVAL);
1191 }
1192 /* allow v6 addresses precedence */
1193 error = sctp6_peeraddr(so, nam);
1194 #ifdef INET
1195 if (error) {
1196 /* try v4 next if v6 failed */
1197 error = sctp_peeraddr(so, nam);
1198 if (error) {
1199 return (error);
1200 }
1201 addr = *nam;
1202 /* if I'm V6ONLY, convert it to v4-mapped */
1203 if (SCTP_IPV6_V6ONLY(inp6)) {
1204 struct sockaddr_in6 sin6;
1205
1206 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6);
1207 memcpy(addr, &sin6, sizeof(struct sockaddr_in6));
1208 }
1209 }
1210 #endif
1211 return (error);
1212 }
1213
1214 struct pr_usrreqs sctp6_usrreqs = {
1215 .pru_abort = sctp6_abort,
1216 .pru_accept = sctp_accept,
1217 .pru_attach = sctp6_attach,
1218 .pru_bind = sctp6_bind,
1219 .pru_connect = sctp6_connect,
1220 .pru_control = in6_control,
1221 .pru_close = sctp6_close,
1222 .pru_detach = sctp6_close,
1223 .pru_sopoll = sopoll_generic,
1224 .pru_flush = sctp_flush,
1225 .pru_disconnect = sctp6_disconnect,
1226 .pru_listen = sctp_listen,
1227 .pru_peeraddr = sctp6_getpeeraddr,
1228 .pru_send = sctp6_send,
1229 .pru_shutdown = sctp_shutdown,
1230 .pru_sockaddr = sctp6_in6getaddr,
1231 .pru_sosend = sctp_sosend,
1232 .pru_soreceive = sctp_soreceive
1233 };
1234
1235 #endif
Cache object: a3df0c41ca9e7d9ccd0baf5ef810f875
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