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("$FreeBSD$");
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 if (faithprefix_p != NULL && (*faithprefix_p) (&dst.sin6_addr)) {
141 /* XXX send icmp6 host/port unreach? */
142 goto out;
143 }
144 length = ntohs(ip6->ip6_plen) + iphlen;
145 /* Validate mbuf chain length with IP payload length. */
146 if (SCTP_HEADER_LEN(m) != length) {
147 SCTPDBG(SCTP_DEBUG_INPUT1,
148 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
149 SCTP_STAT_INCR(sctps_hdrops);
150 goto out;
151 }
152 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
153 goto out;
154 }
155 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
156 #if defined(SCTP_WITH_NO_CSUM)
157 SCTP_STAT_INCR(sctps_recvnocrc);
158 #else
159 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
160 SCTP_STAT_INCR(sctps_recvhwcrc);
161 compute_crc = 0;
162 } else {
163 SCTP_STAT_INCR(sctps_recvswcrc);
164 compute_crc = 1;
165 }
166 #endif
167 sctp_common_input_processing(&m, iphlen, offset, length,
168 (struct sockaddr *)&src,
169 (struct sockaddr *)&dst,
170 sh, ch,
171 #if !defined(SCTP_WITH_NO_CSUM)
172 compute_crc,
173 #endif
174 ecn_bits,
175 mflowtype, mflowid, fibnum,
176 vrf_id, port);
177 out:
178 if (m) {
179 sctp_m_freem(m);
180 }
181 return (IPPROTO_DONE);
182 }
183
184
185 int
186 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
187 {
188 return (sctp6_input_with_port(i_pak, offp, 0));
189 }
190
191 static void
192 sctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6,
193 struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net)
194 {
195 uint32_t nxtsz;
196
197 if ((inp == NULL) || (stcb == NULL) || (net == NULL) ||
198 (icmp6 == NULL) || (sh == NULL)) {
199 goto out;
200 }
201 /* First do we even look at it? */
202 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag))
203 goto out;
204
205 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) {
206 /* not PACKET TO BIG */
207 goto out;
208 }
209 /*
210 * ok we need to look closely. We could even get smarter and look at
211 * anyone that we sent to in case we get a different ICMP that tells
212 * us there is no way to reach a host, but for this impl, all we
213 * care about is MTU discovery.
214 */
215 nxtsz = ntohl(icmp6->icmp6_mtu);
216 /* Stop any PMTU timer */
217 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL,
218 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1);
219
220 /* Adjust destination size limit */
221 if (net->mtu > nxtsz) {
222 net->mtu = nxtsz;
223 if (net->port) {
224 net->mtu -= sizeof(struct udphdr);
225 }
226 }
227 /* now what about the ep? */
228 if (stcb->asoc.smallest_mtu > nxtsz) {
229 struct sctp_tmit_chunk *chk;
230
231 /* Adjust that too */
232 stcb->asoc.smallest_mtu = nxtsz;
233 /* now off to subtract IP_DF flag if needed */
234
235 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) {
236 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) {
237 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
238 }
239 }
240 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
241 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) {
242 /*
243 * For this guy we also mark for immediate
244 * resend since we sent to big of chunk
245 */
246 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
247 if (chk->sent != SCTP_DATAGRAM_RESEND)
248 stcb->asoc.sent_queue_retran_cnt++;
249 chk->sent = SCTP_DATAGRAM_RESEND;
250 chk->rec.data.doing_fast_retransmit = 0;
251
252 chk->sent = SCTP_DATAGRAM_RESEND;
253 /* Clear any time so NO RTT is being done */
254 chk->sent_rcv_time.tv_sec = 0;
255 chk->sent_rcv_time.tv_usec = 0;
256 stcb->asoc.total_flight -= chk->send_size;
257 net->flight_size -= chk->send_size;
258 }
259 }
260 }
261 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL);
262 out:
263 if (stcb) {
264 SCTP_TCB_UNLOCK(stcb);
265 }
266 }
267
268
269 void
270 sctp6_notify(struct sctp_inpcb *inp,
271 struct icmp6_hdr *icmph,
272 struct sctphdr *sh,
273 struct sockaddr *to,
274 struct sctp_tcb *stcb,
275 struct sctp_nets *net)
276 {
277 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
278 struct socket *so;
279
280 #endif
281
282 /* protection */
283 if ((inp == NULL) || (stcb == NULL) || (net == NULL) ||
284 (sh == NULL) || (to == NULL)) {
285 if (stcb)
286 SCTP_TCB_UNLOCK(stcb);
287 return;
288 }
289 /* First job is to verify the vtag matches what I would send */
290 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) {
291 SCTP_TCB_UNLOCK(stcb);
292 return;
293 }
294 if (icmph->icmp6_type != ICMP_UNREACH) {
295 /* We only care about unreachable */
296 SCTP_TCB_UNLOCK(stcb);
297 return;
298 }
299 if ((icmph->icmp6_code == ICMP_UNREACH_NET) ||
300 (icmph->icmp6_code == ICMP_UNREACH_HOST) ||
301 (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) ||
302 (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) ||
303 (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) ||
304 (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) ||
305 (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) ||
306 (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) {
307
308 /*
309 * Hmm reachablity problems we must examine closely. If its
310 * not reachable, we may have lost a network. Or if there is
311 * NO protocol at the other end named SCTP. well we consider
312 * it a OOTB abort.
313 */
314 if (net->dest_state & SCTP_ADDR_REACHABLE) {
315 /* Ok that destination is NOT reachable */
316 net->dest_state &= ~SCTP_ADDR_REACHABLE;
317 net->dest_state &= ~SCTP_ADDR_PF;
318 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
319 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
320 }
321 SCTP_TCB_UNLOCK(stcb);
322 } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) ||
323 (icmph->icmp6_code == ICMP_UNREACH_PORT)) {
324 /*
325 * Here the peer is either playing tricks on us, including
326 * an address that belongs to someone who does not support
327 * SCTP OR was a userland implementation that shutdown and
328 * now is dead. In either case treat it like a OOTB abort
329 * with no TCB
330 */
331 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED);
332 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
333 so = SCTP_INP_SO(inp);
334 atomic_add_int(&stcb->asoc.refcnt, 1);
335 SCTP_TCB_UNLOCK(stcb);
336 SCTP_SOCKET_LOCK(so, 1);
337 SCTP_TCB_LOCK(stcb);
338 atomic_subtract_int(&stcb->asoc.refcnt, 1);
339 #endif
340 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
341 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2);
342 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
343 SCTP_SOCKET_UNLOCK(so, 1);
344 /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */
345 #endif
346 /* no need to unlock here, since the TCB is gone */
347 } else {
348 SCTP_TCB_UNLOCK(stcb);
349 }
350 }
351
352
353
354 void
355 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
356 {
357 struct sctphdr sh;
358 struct ip6ctlparam *ip6cp = NULL;
359 uint32_t vrf_id;
360
361 vrf_id = SCTP_DEFAULT_VRFID;
362
363 if (pktdst->sa_family != AF_INET6 ||
364 pktdst->sa_len != sizeof(struct sockaddr_in6))
365 return;
366
367 if ((unsigned)cmd >= PRC_NCMDS)
368 return;
369 if (PRC_IS_REDIRECT(cmd)) {
370 d = NULL;
371 } else if (inet6ctlerrmap[cmd] == 0) {
372 return;
373 }
374 /* if the parameter is from icmp6, decode it. */
375 if (d != NULL) {
376 ip6cp = (struct ip6ctlparam *)d;
377 } else {
378 ip6cp = (struct ip6ctlparam *)NULL;
379 }
380
381 if (ip6cp) {
382 /*
383 * XXX: We assume that when IPV6 is non NULL, M and OFF are
384 * valid.
385 */
386 struct sctp_inpcb *inp = NULL;
387 struct sctp_tcb *stcb = NULL;
388 struct sctp_nets *net = NULL;
389 struct sockaddr_in6 final;
390
391 if (ip6cp->ip6c_m == NULL)
392 return;
393
394 /* Check if we can safely examine the SCTP header. */
395 if (ip6cp->ip6c_m->m_pkthdr.len < ip6cp->ip6c_off + sizeof(sh))
396 return;
397
398 bzero(&sh, sizeof(sh));
399 bzero(&final, sizeof(final));
400 inp = NULL;
401 net = NULL;
402 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh),
403 (caddr_t)&sh);
404 ip6cp->ip6c_src->sin6_port = sh.src_port;
405 final.sin6_len = sizeof(final);
406 final.sin6_family = AF_INET6;
407 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr;
408 final.sin6_port = sh.dest_port;
409 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&final,
410 (struct sockaddr *)ip6cp->ip6c_src,
411 &inp, &net, 1, vrf_id);
412 /* inp's ref-count increased && stcb locked */
413 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) {
414 if (cmd == PRC_MSGSIZE) {
415 sctp6_notify_mbuf(inp,
416 ip6cp->ip6c_icmp6,
417 &sh,
418 stcb,
419 net);
420 /* inp's ref-count reduced && stcb unlocked */
421 } else {
422 sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh,
423 (struct sockaddr *)&final,
424 stcb, net);
425 /* inp's ref-count reduced && stcb unlocked */
426 }
427 } else {
428 if (PRC_IS_REDIRECT(cmd) && inp) {
429 in6_rtchange((struct in6pcb *)inp,
430 inet6ctlerrmap[cmd]);
431 }
432 if (inp) {
433 /* reduce inp's ref-count */
434 SCTP_INP_WLOCK(inp);
435 SCTP_INP_DECR_REF(inp);
436 SCTP_INP_WUNLOCK(inp);
437 }
438 if (stcb)
439 SCTP_TCB_UNLOCK(stcb);
440 }
441 }
442 }
443
444 /*
445 * this routine can probably be collasped into the one in sctp_userreq.c
446 * since they do the same thing and now we lookup with a sockaddr
447 */
448 static int
449 sctp6_getcred(SYSCTL_HANDLER_ARGS)
450 {
451 struct xucred xuc;
452 struct sockaddr_in6 addrs[2];
453 struct sctp_inpcb *inp;
454 struct sctp_nets *net;
455 struct sctp_tcb *stcb;
456 int error;
457 uint32_t vrf_id;
458
459 vrf_id = SCTP_DEFAULT_VRFID;
460
461 error = priv_check(req->td, PRIV_NETINET_GETCRED);
462 if (error)
463 return (error);
464
465 if (req->newlen != sizeof(addrs)) {
466 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
467 return (EINVAL);
468 }
469 if (req->oldlen != sizeof(struct ucred)) {
470 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
471 return (EINVAL);
472 }
473 error = SYSCTL_IN(req, addrs, sizeof(addrs));
474 if (error)
475 return (error);
476
477 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
478 sin6tosa(&addrs[0]),
479 &inp, &net, 1, vrf_id);
480 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
481 if ((inp != NULL) && (stcb == NULL)) {
482 /* reduce ref-count */
483 SCTP_INP_WLOCK(inp);
484 SCTP_INP_DECR_REF(inp);
485 goto cred_can_cont;
486 }
487 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
488 error = ENOENT;
489 goto out;
490 }
491 SCTP_TCB_UNLOCK(stcb);
492 /*
493 * We use the write lock here, only since in the error leg we need
494 * it. If we used RLOCK, then we would have to
495 * wlock/decr/unlock/rlock. Which in theory could create a hole.
496 * Better to use higher wlock.
497 */
498 SCTP_INP_WLOCK(inp);
499 cred_can_cont:
500 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
501 if (error) {
502 SCTP_INP_WUNLOCK(inp);
503 goto out;
504 }
505 cru2x(inp->sctp_socket->so_cred, &xuc);
506 SCTP_INP_WUNLOCK(inp);
507 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
508 out:
509 return (error);
510 }
511
512 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
513 0, 0,
514 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
515
516
517 /* This is the same as the sctp_abort() could be made common */
518 static void
519 sctp6_abort(struct socket *so)
520 {
521 struct sctp_inpcb *inp;
522 uint32_t flags;
523
524 inp = (struct sctp_inpcb *)so->so_pcb;
525 if (inp == NULL) {
526 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
527 return;
528 }
529 sctp_must_try_again:
530 flags = inp->sctp_flags;
531 #ifdef SCTP_LOG_CLOSING
532 sctp_log_closing(inp, NULL, 17);
533 #endif
534 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
535 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
536 #ifdef SCTP_LOG_CLOSING
537 sctp_log_closing(inp, NULL, 16);
538 #endif
539 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
540 SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
541 SOCK_LOCK(so);
542 SCTP_SB_CLEAR(so->so_snd);
543 /*
544 * same for the rcv ones, they are only here for the
545 * accounting/select.
546 */
547 SCTP_SB_CLEAR(so->so_rcv);
548 /* Now null out the reference, we are completely detached. */
549 so->so_pcb = NULL;
550 SOCK_UNLOCK(so);
551 } else {
552 flags = inp->sctp_flags;
553 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
554 goto sctp_must_try_again;
555 }
556 }
557 return;
558 }
559
560 static int
561 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
562 {
563 struct in6pcb *inp6;
564 int error;
565 struct sctp_inpcb *inp;
566 uint32_t vrf_id = SCTP_DEFAULT_VRFID;
567
568 inp = (struct sctp_inpcb *)so->so_pcb;
569 if (inp != NULL) {
570 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
571 return (EINVAL);
572 }
573 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
574 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
575 if (error)
576 return (error);
577 }
578 error = sctp_inpcb_alloc(so, vrf_id);
579 if (error)
580 return (error);
581 inp = (struct sctp_inpcb *)so->so_pcb;
582 SCTP_INP_WLOCK(inp);
583 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */
584 inp6 = (struct in6pcb *)inp;
585
586 inp6->inp_vflag |= INP_IPV6;
587 inp6->in6p_hops = -1; /* use kernel default */
588 inp6->in6p_cksum = -1; /* just to be sure */
589 #ifdef INET
590 /*
591 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
592 * socket as well, because the socket may be bound to an IPv6
593 * wildcard address, which may match an IPv4-mapped IPv6 address.
594 */
595 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
596 #endif
597 /*
598 * Hmm what about the IPSEC stuff that is missing here but in
599 * sctp_attach()?
600 */
601 SCTP_INP_WUNLOCK(inp);
602 return (0);
603 }
604
605 static int
606 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
607 {
608 struct sctp_inpcb *inp;
609 struct in6pcb *inp6;
610 int error;
611 u_char vflagsav;
612
613 inp = (struct sctp_inpcb *)so->so_pcb;
614 if (inp == NULL) {
615 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
616 return (EINVAL);
617 }
618 if (addr) {
619 switch (addr->sa_family) {
620 #ifdef INET
621 case AF_INET:
622 if (addr->sa_len != sizeof(struct sockaddr_in)) {
623 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
624 return (EINVAL);
625 }
626 break;
627 #endif
628 #ifdef INET6
629 case AF_INET6:
630 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
631 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
632 return (EINVAL);
633 }
634 break;
635 #endif
636 default:
637 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
638 return (EINVAL);
639 }
640 }
641 inp6 = (struct in6pcb *)inp;
642 vflagsav = inp6->inp_vflag;
643 inp6->inp_vflag &= ~INP_IPV4;
644 inp6->inp_vflag |= INP_IPV6;
645 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) {
646 switch (addr->sa_family) {
647 #ifdef INET
648 case AF_INET:
649 /* binding v4 addr to v6 socket, so reset flags */
650 inp6->inp_vflag |= INP_IPV4;
651 inp6->inp_vflag &= ~INP_IPV6;
652 break;
653 #endif
654 #ifdef INET6
655 case AF_INET6:
656 {
657 struct sockaddr_in6 *sin6_p;
658
659 sin6_p = (struct sockaddr_in6 *)addr;
660
661 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
662 inp6->inp_vflag |= INP_IPV4;
663 }
664 #ifdef INET
665 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
666 struct sockaddr_in sin;
667
668 in6_sin6_2_sin(&sin, sin6_p);
669 inp6->inp_vflag |= INP_IPV4;
670 inp6->inp_vflag &= ~INP_IPV6;
671 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
672 goto out;
673 }
674 #endif
675 break;
676 }
677 #endif
678 default:
679 break;
680 }
681 } else if (addr != NULL) {
682 struct sockaddr_in6 *sin6_p;
683
684 /* IPV6_V6ONLY socket */
685 #ifdef INET
686 if (addr->sa_family == AF_INET) {
687 /* can't bind v4 addr to v6 only socket! */
688 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
689 error = EINVAL;
690 goto out;
691 }
692 #endif
693 sin6_p = (struct sockaddr_in6 *)addr;
694
695 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
696 /* can't bind v4-mapped addrs either! */
697 /* NOTE: we don't support SIIT */
698 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
699 error = EINVAL;
700 goto out;
701 }
702 }
703 error = sctp_inpcb_bind(so, addr, NULL, p);
704 out:
705 if (error != 0)
706 inp6->inp_vflag = vflagsav;
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 sctp_tcb *stcb;
843
844 #ifdef INET
845 struct in6pcb *inp6;
846 struct sockaddr_in6 *sin6;
847 union sctp_sockstore store;
848
849 #endif
850
851 #ifdef INET
852 inp6 = (struct in6pcb *)so->so_pcb;
853 #endif
854 inp = (struct sctp_inpcb *)so->so_pcb;
855 if (inp == NULL) {
856 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
857 return (ECONNRESET); /* I made the same as TCP since we are
858 * not setup? */
859 }
860 if (addr == NULL) {
861 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
862 return (EINVAL);
863 }
864 switch (addr->sa_family) {
865 #ifdef INET
866 case AF_INET:
867 if (addr->sa_len != sizeof(struct sockaddr_in)) {
868 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
869 return (EINVAL);
870 }
871 break;
872 #endif
873 #ifdef INET6
874 case AF_INET6:
875 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
876 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
877 return (EINVAL);
878 }
879 break;
880 #endif
881 default:
882 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
883 return (EINVAL);
884 }
885
886 vrf_id = inp->def_vrf_id;
887 SCTP_ASOC_CREATE_LOCK(inp);
888 SCTP_INP_RLOCK(inp);
889 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
890 SCTP_PCB_FLAGS_UNBOUND) {
891 /* Bind a ephemeral port */
892 SCTP_INP_RUNLOCK(inp);
893 error = sctp6_bind(so, NULL, p);
894 if (error) {
895 SCTP_ASOC_CREATE_UNLOCK(inp);
896
897 return (error);
898 }
899 SCTP_INP_RLOCK(inp);
900 }
901 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
902 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
903 /* We are already connected AND the TCP model */
904 SCTP_INP_RUNLOCK(inp);
905 SCTP_ASOC_CREATE_UNLOCK(inp);
906 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
907 return (EADDRINUSE);
908 }
909 #ifdef INET
910 sin6 = (struct sockaddr_in6 *)addr;
911 if (SCTP_IPV6_V6ONLY(inp6)) {
912 /*
913 * if IPV6_V6ONLY flag, ignore connections destined to a v4
914 * addr or v4-mapped addr
915 */
916 if (addr->sa_family == AF_INET) {
917 SCTP_INP_RUNLOCK(inp);
918 SCTP_ASOC_CREATE_UNLOCK(inp);
919 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
920 return (EINVAL);
921 }
922 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
923 SCTP_INP_RUNLOCK(inp);
924 SCTP_ASOC_CREATE_UNLOCK(inp);
925 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
926 return (EINVAL);
927 }
928 }
929 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
930 /* convert v4-mapped into v4 addr */
931 in6_sin6_2_sin(&store.sin, sin6);
932 addr = &store.sa;
933 }
934 #endif /* INET */
935 /* Now do we connect? */
936 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
937 stcb = LIST_FIRST(&inp->sctp_asoc_list);
938 if (stcb) {
939 SCTP_TCB_UNLOCK(stcb);
940 }
941 SCTP_INP_RUNLOCK(inp);
942 } else {
943 SCTP_INP_RUNLOCK(inp);
944 SCTP_INP_WLOCK(inp);
945 SCTP_INP_INCR_REF(inp);
946 SCTP_INP_WUNLOCK(inp);
947 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
948 if (stcb == NULL) {
949 SCTP_INP_WLOCK(inp);
950 SCTP_INP_DECR_REF(inp);
951 SCTP_INP_WUNLOCK(inp);
952 }
953 }
954
955 if (stcb != NULL) {
956 /* Already have or am bring up an association */
957 SCTP_ASOC_CREATE_UNLOCK(inp);
958 SCTP_TCB_UNLOCK(stcb);
959 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
960 return (EALREADY);
961 }
962 /* We are GOOD to go */
963 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, inp->sctp_ep.pre_open_stream_count, p);
964 SCTP_ASOC_CREATE_UNLOCK(inp);
965 if (stcb == NULL) {
966 /* Gak! no memory */
967 return (error);
968 }
969 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
970 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
971 /* Set the connected flag so we can queue data */
972 soisconnecting(so);
973 }
974 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT;
975 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
976
977 /* initialize authentication parameters for the assoc */
978 sctp_initialize_auth_params(inp, stcb);
979
980 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
981 SCTP_TCB_UNLOCK(stcb);
982 return (error);
983 }
984
985 static int
986 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
987 {
988 struct sockaddr_in6 *sin6;
989 struct sctp_inpcb *inp;
990 uint32_t vrf_id;
991 struct sctp_ifa *sctp_ifa;
992
993 int error;
994
995 /*
996 * Do the malloc first in case it blocks.
997 */
998 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
999 if (sin6 == NULL)
1000 return (ENOMEM);
1001 sin6->sin6_family = AF_INET6;
1002 sin6->sin6_len = sizeof(*sin6);
1003
1004 inp = (struct sctp_inpcb *)so->so_pcb;
1005 if (inp == NULL) {
1006 SCTP_FREE_SONAME(sin6);
1007 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1008 return (ECONNRESET);
1009 }
1010 SCTP_INP_RLOCK(inp);
1011 sin6->sin6_port = inp->sctp_lport;
1012 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1013 /* For the bound all case you get back 0 */
1014 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
1015 struct sctp_tcb *stcb;
1016 struct sockaddr_in6 *sin_a6;
1017 struct sctp_nets *net;
1018 int fnd;
1019
1020 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1021 if (stcb == NULL) {
1022 SCTP_INP_RUNLOCK(inp);
1023 SCTP_FREE_SONAME(sin6);
1024 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1025 return (ENOENT);
1026 }
1027 fnd = 0;
1028 sin_a6 = NULL;
1029 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1030 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1031 if (sin_a6 == NULL)
1032 /* this will make coverity happy */
1033 continue;
1034
1035 if (sin_a6->sin6_family == AF_INET6) {
1036 fnd = 1;
1037 break;
1038 }
1039 }
1040 if ((!fnd) || (sin_a6 == NULL)) {
1041 /* punt */
1042 SCTP_INP_RUNLOCK(inp);
1043 SCTP_FREE_SONAME(sin6);
1044 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1045 return (ENOENT);
1046 }
1047 vrf_id = inp->def_vrf_id;
1048 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id);
1049 if (sctp_ifa) {
1050 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
1051 }
1052 } else {
1053 /* For the bound all case you get back 0 */
1054 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
1055 }
1056 } else {
1057 /* Take the first IPv6 address in the list */
1058 struct sctp_laddr *laddr;
1059 int fnd = 0;
1060
1061 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1062 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
1063 struct sockaddr_in6 *sin_a;
1064
1065 sin_a = &laddr->ifa->address.sin6;
1066 sin6->sin6_addr = sin_a->sin6_addr;
1067 fnd = 1;
1068 break;
1069 }
1070 }
1071 if (!fnd) {
1072 SCTP_FREE_SONAME(sin6);
1073 SCTP_INP_RUNLOCK(inp);
1074 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1075 return (ENOENT);
1076 }
1077 }
1078 SCTP_INP_RUNLOCK(inp);
1079 /* Scoping things for v6 */
1080 if ((error = sa6_recoverscope(sin6)) != 0) {
1081 SCTP_FREE_SONAME(sin6);
1082 return (error);
1083 }
1084 (*addr) = (struct sockaddr *)sin6;
1085 return (0);
1086 }
1087
1088 static int
1089 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1090 {
1091 struct sockaddr_in6 *sin6;
1092 int fnd;
1093 struct sockaddr_in6 *sin_a6;
1094 struct sctp_inpcb *inp;
1095 struct sctp_tcb *stcb;
1096 struct sctp_nets *net;
1097 int error;
1098
1099 /* Do the malloc first in case it blocks. */
1100 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1101 if (sin6 == NULL)
1102 return (ENOMEM);
1103 sin6->sin6_family = AF_INET6;
1104 sin6->sin6_len = sizeof(*sin6);
1105
1106 inp = (struct sctp_inpcb *)so->so_pcb;
1107 if ((inp == NULL) ||
1108 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
1109 /* UDP type and listeners will drop out here */
1110 SCTP_FREE_SONAME(sin6);
1111 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
1112 return (ENOTCONN);
1113 }
1114 SCTP_INP_RLOCK(inp);
1115 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1116 if (stcb) {
1117 SCTP_TCB_LOCK(stcb);
1118 }
1119 SCTP_INP_RUNLOCK(inp);
1120 if (stcb == NULL) {
1121 SCTP_FREE_SONAME(sin6);
1122 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1123 return (ECONNRESET);
1124 }
1125 fnd = 0;
1126 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1127 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1128 if (sin_a6->sin6_family == AF_INET6) {
1129 fnd = 1;
1130 sin6->sin6_port = stcb->rport;
1131 sin6->sin6_addr = sin_a6->sin6_addr;
1132 break;
1133 }
1134 }
1135 SCTP_TCB_UNLOCK(stcb);
1136 if (!fnd) {
1137 /* No IPv4 address */
1138 SCTP_FREE_SONAME(sin6);
1139 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1140 return (ENOENT);
1141 }
1142 if ((error = sa6_recoverscope(sin6)) != 0) {
1143 SCTP_FREE_SONAME(sin6);
1144 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error);
1145 return (error);
1146 }
1147 *addr = (struct sockaddr *)sin6;
1148 return (0);
1149 }
1150
1151 static int
1152 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1153 {
1154 struct in6pcb *inp6 = sotoin6pcb(so);
1155 int error;
1156
1157 if (inp6 == NULL) {
1158 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1159 return (EINVAL);
1160 }
1161 /* allow v6 addresses precedence */
1162 error = sctp6_getaddr(so, nam);
1163 #ifdef INET
1164 if (error) {
1165 struct sockaddr_in6 *sin6;
1166
1167 /* try v4 next if v6 failed */
1168 error = sctp_ingetaddr(so, nam);
1169 if (error) {
1170 return (error);
1171 }
1172 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1173 if (sin6 == NULL) {
1174 SCTP_FREE_SONAME(*nam);
1175 return (ENOMEM);
1176 }
1177 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1178 SCTP_FREE_SONAME(*nam);
1179 *nam = (struct sockaddr *)sin6;
1180 }
1181 #endif
1182 return (error);
1183 }
1184
1185
1186 static int
1187 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1188 {
1189 struct in6pcb *inp6 = sotoin6pcb(so);
1190 int error;
1191
1192 if (inp6 == NULL) {
1193 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1194 return (EINVAL);
1195 }
1196 /* allow v6 addresses precedence */
1197 error = sctp6_peeraddr(so, nam);
1198 #ifdef INET
1199 if (error) {
1200 struct sockaddr_in6 *sin6;
1201
1202 /* try v4 next if v6 failed */
1203 error = sctp_peeraddr(so, nam);
1204 if (error) {
1205 return (error);
1206 }
1207 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1208 if (sin6 == NULL) {
1209 SCTP_FREE_SONAME(*nam);
1210 return (ENOMEM);
1211 }
1212 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1213 SCTP_FREE_SONAME(*nam);
1214 *nam = (struct sockaddr *)sin6;
1215 }
1216 #endif
1217 return (error);
1218 }
1219
1220 struct pr_usrreqs sctp6_usrreqs = {
1221 .pru_abort = sctp6_abort,
1222 .pru_accept = sctp_accept,
1223 .pru_attach = sctp6_attach,
1224 .pru_bind = sctp6_bind,
1225 .pru_connect = sctp6_connect,
1226 .pru_control = in6_control,
1227 .pru_close = sctp6_close,
1228 .pru_detach = sctp6_close,
1229 .pru_sopoll = sopoll_generic,
1230 .pru_flush = sctp_flush,
1231 .pru_disconnect = sctp6_disconnect,
1232 .pru_listen = sctp_listen,
1233 .pru_peeraddr = sctp6_getpeeraddr,
1234 .pru_send = sctp6_send,
1235 .pru_shutdown = sctp_shutdown,
1236 .pru_sockaddr = sctp6_in6getaddr,
1237 .pru_sosend = sctp_sosend,
1238 .pru_soreceive = sctp_soreceive
1239 };
1240
1241 #endif
Cache object: 3a2ded8170f558f78ab0f82e7b0e6506
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