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