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 extern struct protosw inetsw[];
59
60 int
sctp6_input_with_port(struct mbuf ** i_pak,int * offp,uint16_t port)61 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port)
62 {
63 struct mbuf *m;
64 int iphlen;
65 uint32_t vrf_id;
66 uint8_t ecn_bits;
67 struct sockaddr_in6 src, dst;
68 struct ip6_hdr *ip6;
69 struct sctphdr *sh;
70 struct sctp_chunkhdr *ch;
71 int length, offset;
72 uint8_t compute_crc;
73 uint32_t mflowid;
74 uint8_t mflowtype;
75 uint16_t fibnum;
76
77 iphlen = *offp;
78 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) {
79 SCTP_RELEASE_PKT(*i_pak);
80 return (IPPROTO_DONE);
81 }
82 m = SCTP_HEADER_TO_CHAIN(*i_pak);
83 #ifdef SCTP_MBUF_LOGGING
84 /* Log in any input mbufs */
85 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
86 sctp_log_mbc(m, SCTP_MBUF_INPUT);
87 }
88 #endif
89 #ifdef SCTP_PACKET_LOGGING
90 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
91 sctp_packet_log(m);
92 }
93 #endif
94 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
95 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
96 m->m_pkthdr.len,
97 if_name(m->m_pkthdr.rcvif),
98 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
99 mflowid = m->m_pkthdr.flowid;
100 mflowtype = M_HASHTYPE_GET(m);
101 fibnum = M_GETFIB(m);
102 SCTP_STAT_INCR(sctps_recvpackets);
103 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
104 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
105 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
106 ip6 = mtod(m, struct ip6_hdr *);
107 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen,
108 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)));
109 if (sh == NULL) {
110 SCTP_STAT_INCR(sctps_hdrops);
111 return (IPPROTO_DONE);
112 }
113 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
114 offset -= sizeof(struct sctp_chunkhdr);
115 memset(&src, 0, sizeof(struct sockaddr_in6));
116 src.sin6_family = AF_INET6;
117 src.sin6_len = sizeof(struct sockaddr_in6);
118 src.sin6_port = sh->src_port;
119 src.sin6_addr = ip6->ip6_src;
120 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
121 goto out;
122 }
123 memset(&dst, 0, sizeof(struct sockaddr_in6));
124 dst.sin6_family = AF_INET6;
125 dst.sin6_len = sizeof(struct sockaddr_in6);
126 dst.sin6_port = sh->dest_port;
127 dst.sin6_addr = ip6->ip6_dst;
128 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
129 goto out;
130 }
131 length = ntohs(ip6->ip6_plen) + iphlen;
132 /* Validate mbuf chain length with IP payload length. */
133 if (SCTP_HEADER_LEN(m) != length) {
134 SCTPDBG(SCTP_DEBUG_INPUT1,
135 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
136 SCTP_STAT_INCR(sctps_hdrops);
137 goto out;
138 }
139 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
140 goto out;
141 }
142 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
143 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
144 SCTP_STAT_INCR(sctps_recvhwcrc);
145 compute_crc = 0;
146 } else {
147 SCTP_STAT_INCR(sctps_recvswcrc);
148 compute_crc = 1;
149 }
150 sctp_common_input_processing(&m, iphlen, offset, length,
151 (struct sockaddr *)&src,
152 (struct sockaddr *)&dst,
153 sh, ch,
154 compute_crc,
155 ecn_bits,
156 mflowtype, mflowid, fibnum,
157 vrf_id, port);
158 out:
159 if (m) {
160 sctp_m_freem(m);
161 }
162 return (IPPROTO_DONE);
163 }
164
165
166 int
sctp6_input(struct mbuf ** i_pak,int * offp,int proto SCTP_UNUSED)167 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
168 {
169 return (sctp6_input_with_port(i_pak, offp, 0));
170 }
171
172 void
sctp6_notify(struct sctp_inpcb * inp,struct sctp_tcb * stcb,struct sctp_nets * net,uint8_t icmp6_type,uint8_t icmp6_code,uint32_t next_mtu)173 sctp6_notify(struct sctp_inpcb *inp,
174 struct sctp_tcb *stcb,
175 struct sctp_nets *net,
176 uint8_t icmp6_type,
177 uint8_t icmp6_code,
178 uint32_t next_mtu)
179 {
180 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
181 struct socket *so;
182 #endif
183 int timer_stopped;
184
185 switch (icmp6_type) {
186 case ICMP6_DST_UNREACH:
187 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) ||
188 (icmp6_code == ICMP6_DST_UNREACH_ADMIN) ||
189 (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) ||
190 (icmp6_code == ICMP6_DST_UNREACH_ADDR)) {
191 /* Mark the net unreachable. */
192 if (net->dest_state & SCTP_ADDR_REACHABLE) {
193 /* Ok that destination is not reachable */
194 net->dest_state &= ~SCTP_ADDR_REACHABLE;
195 net->dest_state &= ~SCTP_ADDR_PF;
196 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
197 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
198 }
199 }
200 SCTP_TCB_UNLOCK(stcb);
201 break;
202 case ICMP6_PARAM_PROB:
203 /* Treat it like an ABORT. */
204 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) {
205 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED);
206 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
207 so = SCTP_INP_SO(inp);
208 atomic_add_int(&stcb->asoc.refcnt, 1);
209 SCTP_TCB_UNLOCK(stcb);
210 SCTP_SOCKET_LOCK(so, 1);
211 SCTP_TCB_LOCK(stcb);
212 atomic_subtract_int(&stcb->asoc.refcnt, 1);
213 #endif
214 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
215 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2);
216 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
217 SCTP_SOCKET_UNLOCK(so, 1);
218 #endif
219 } else {
220 SCTP_TCB_UNLOCK(stcb);
221 }
222 break;
223 case ICMP6_PACKET_TOO_BIG:
224 if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
225 SCTP_TCB_UNLOCK(stcb);
226 break;
227 }
228 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) {
229 timer_stopped = 1;
230 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
231 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1);
232 } else {
233 timer_stopped = 0;
234 }
235 /* Update the path MTU. */
236 if (net->port) {
237 next_mtu -= sizeof(struct udphdr);
238 }
239 if (net->mtu > next_mtu) {
240 net->mtu = next_mtu;
241 if (net->port) {
242 sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr));
243 } else {
244 sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu);
245 }
246 }
247 /* Update the association MTU */
248 if (stcb->asoc.smallest_mtu > next_mtu) {
249 sctp_pathmtu_adjustment(stcb, next_mtu);
250 }
251 /* Finally, start the PMTU timer if it was running before. */
252 if (timer_stopped) {
253 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
254 }
255 SCTP_TCB_UNLOCK(stcb);
256 break;
257 default:
258 SCTP_TCB_UNLOCK(stcb);
259 break;
260 }
261 }
262
263 void
sctp6_ctlinput(int cmd,struct sockaddr * pktdst,void * d)264 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
265 {
266 struct ip6ctlparam *ip6cp;
267 struct sctp_inpcb *inp;
268 struct sctp_tcb *stcb;
269 struct sctp_nets *net;
270 struct sctphdr sh;
271 struct sockaddr_in6 src, dst;
272
273 if (pktdst->sa_family != AF_INET6 ||
274 pktdst->sa_len != sizeof(struct sockaddr_in6)) {
275 return;
276 }
277
278 if ((unsigned)cmd >= PRC_NCMDS) {
279 return;
280 }
281 if (PRC_IS_REDIRECT(cmd)) {
282 d = NULL;
283 } else if (inet6ctlerrmap[cmd] == 0) {
284 return;
285 }
286 /* If the parameter is from icmp6, decode it. */
287 if (d != NULL) {
288 ip6cp = (struct ip6ctlparam *)d;
289 } else {
290 ip6cp = (struct ip6ctlparam *)NULL;
291 }
292
293 if (ip6cp != NULL) {
294 /*
295 * XXX: We assume that when IPV6 is non NULL, M and OFF are
296 * valid.
297 */
298 if (ip6cp->ip6c_m == NULL) {
299 return;
300 }
301
302 /*
303 * Check if we can safely examine the ports and the
304 * verification tag of the SCTP common header.
305 */
306 if (ip6cp->ip6c_m->m_pkthdr.len <
307 (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) {
308 return;
309 }
310
311 /* Copy out the port numbers and the verification tag. */
312 memset(&sh, 0, sizeof(sh));
313 m_copydata(ip6cp->ip6c_m,
314 ip6cp->ip6c_off,
315 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
316 (caddr_t)&sh);
317 memset(&src, 0, sizeof(struct sockaddr_in6));
318 src.sin6_family = AF_INET6;
319 src.sin6_len = sizeof(struct sockaddr_in6);
320 src.sin6_port = sh.src_port;
321 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
322 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
323 return;
324 }
325 memset(&dst, 0, sizeof(struct sockaddr_in6));
326 dst.sin6_family = AF_INET6;
327 dst.sin6_len = sizeof(struct sockaddr_in6);
328 dst.sin6_port = sh.dest_port;
329 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
330 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
331 return;
332 }
333 inp = NULL;
334 net = NULL;
335 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
336 (struct sockaddr *)&src,
337 &inp, &net, 1, SCTP_DEFAULT_VRFID);
338 if ((stcb != NULL) &&
339 (net != NULL) &&
340 (inp != NULL)) {
341 /* Check the verification tag */
342 if (ntohl(sh.v_tag) != 0) {
343 /*
344 * This must be the verification tag used
345 * for sending out packets. We don't
346 * consider packets reflecting the
347 * verification tag.
348 */
349 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
350 SCTP_TCB_UNLOCK(stcb);
351 return;
352 }
353 } else {
354 if (ip6cp->ip6c_m->m_pkthdr.len >=
355 ip6cp->ip6c_off + sizeof(struct sctphdr) +
356 sizeof(struct sctp_chunkhdr) +
357 offsetof(struct sctp_init, a_rwnd)) {
358 /*
359 * In this case we can check if we
360 * got an INIT chunk and if the
361 * initiate tag matches.
362 */
363 uint32_t initiate_tag;
364 uint8_t chunk_type;
365
366 m_copydata(ip6cp->ip6c_m,
367 ip6cp->ip6c_off +
368 sizeof(struct sctphdr),
369 sizeof(uint8_t),
370 (caddr_t)&chunk_type);
371 m_copydata(ip6cp->ip6c_m,
372 ip6cp->ip6c_off +
373 sizeof(struct sctphdr) +
374 sizeof(struct sctp_chunkhdr),
375 sizeof(uint32_t),
376 (caddr_t)&initiate_tag);
377 if ((chunk_type != SCTP_INITIATION) ||
378 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
379 SCTP_TCB_UNLOCK(stcb);
380 return;
381 }
382 } else {
383 SCTP_TCB_UNLOCK(stcb);
384 return;
385 }
386 }
387 sctp6_notify(inp, stcb, net,
388 ip6cp->ip6c_icmp6->icmp6_type,
389 ip6cp->ip6c_icmp6->icmp6_code,
390 ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
391 } else {
392 if ((stcb == NULL) && (inp != NULL)) {
393 /* reduce inp's ref-count */
394 SCTP_INP_WLOCK(inp);
395 SCTP_INP_DECR_REF(inp);
396 SCTP_INP_WUNLOCK(inp);
397 }
398 if (stcb) {
399 SCTP_TCB_UNLOCK(stcb);
400 }
401 }
402 }
403 }
404
405 /*
406 * this routine can probably be collasped into the one in sctp_userreq.c
407 * since they do the same thing and now we lookup with a sockaddr
408 */
409 static int
sctp6_getcred(SYSCTL_HANDLER_ARGS)410 sctp6_getcred(SYSCTL_HANDLER_ARGS)
411 {
412 struct xucred xuc;
413 struct sockaddr_in6 addrs[2];
414 struct sctp_inpcb *inp;
415 struct sctp_nets *net;
416 struct sctp_tcb *stcb;
417 int error;
418 uint32_t vrf_id;
419
420 vrf_id = SCTP_DEFAULT_VRFID;
421
422 error = priv_check(req->td, PRIV_NETINET_GETCRED);
423 if (error)
424 return (error);
425
426 if (req->newlen != sizeof(addrs)) {
427 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
428 return (EINVAL);
429 }
430 if (req->oldlen != sizeof(struct ucred)) {
431 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
432 return (EINVAL);
433 }
434 error = SYSCTL_IN(req, addrs, sizeof(addrs));
435 if (error)
436 return (error);
437
438 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
439 sin6tosa(&addrs[0]),
440 &inp, &net, 1, vrf_id);
441 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
442 if ((inp != NULL) && (stcb == NULL)) {
443 /* reduce ref-count */
444 SCTP_INP_WLOCK(inp);
445 SCTP_INP_DECR_REF(inp);
446 goto cred_can_cont;
447 }
448 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
449 error = ENOENT;
450 goto out;
451 }
452 SCTP_TCB_UNLOCK(stcb);
453 /*
454 * We use the write lock here, only since in the error leg we need
455 * it. If we used RLOCK, then we would have to
456 * wlock/decr/unlock/rlock. Which in theory could create a hole.
457 * Better to use higher wlock.
458 */
459 SCTP_INP_WLOCK(inp);
460 cred_can_cont:
461 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
462 if (error) {
463 SCTP_INP_WUNLOCK(inp);
464 goto out;
465 }
466 cru2x(inp->sctp_socket->so_cred, &xuc);
467 SCTP_INP_WUNLOCK(inp);
468 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
469 out:
470 return (error);
471 }
472
473 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
474 0, 0,
475 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
476
477
478 /* This is the same as the sctp_abort() could be made common */
479 static void
sctp6_abort(struct socket * so)480 sctp6_abort(struct socket *so)
481 {
482 struct sctp_inpcb *inp;
483 uint32_t flags;
484
485 inp = (struct sctp_inpcb *)so->so_pcb;
486 if (inp == NULL) {
487 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
488 return;
489 }
490 sctp_must_try_again:
491 flags = inp->sctp_flags;
492 #ifdef SCTP_LOG_CLOSING
493 sctp_log_closing(inp, NULL, 17);
494 #endif
495 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
496 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
497 #ifdef SCTP_LOG_CLOSING
498 sctp_log_closing(inp, NULL, 16);
499 #endif
500 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
501 SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
502 SOCK_LOCK(so);
503 SCTP_SB_CLEAR(so->so_snd);
504 /*
505 * same for the rcv ones, they are only here for the
506 * accounting/select.
507 */
508 SCTP_SB_CLEAR(so->so_rcv);
509 /* Now null out the reference, we are completely detached. */
510 so->so_pcb = NULL;
511 SOCK_UNLOCK(so);
512 } else {
513 flags = inp->sctp_flags;
514 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
515 goto sctp_must_try_again;
516 }
517 }
518 return;
519 }
520
521 static int
sctp6_attach(struct socket * so,int proto SCTP_UNUSED,struct thread * p SCTP_UNUSED)522 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
523 {
524 struct in6pcb *inp6;
525 int error;
526 struct sctp_inpcb *inp;
527 uint32_t vrf_id = SCTP_DEFAULT_VRFID;
528
529 inp = (struct sctp_inpcb *)so->so_pcb;
530 if (inp != NULL) {
531 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
532 return (EINVAL);
533 }
534
535 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
536 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
537 if (error)
538 return (error);
539 }
540 error = sctp_inpcb_alloc(so, vrf_id);
541 if (error)
542 return (error);
543 inp = (struct sctp_inpcb *)so->so_pcb;
544 SCTP_INP_WLOCK(inp);
545 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */
546 inp6 = (struct in6pcb *)inp;
547
548 inp6->inp_vflag |= INP_IPV6;
549 inp6->in6p_hops = -1; /* use kernel default */
550 inp6->in6p_cksum = -1; /* just to be sure */
551 #ifdef INET
552 /*
553 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
554 * socket as well, because the socket may be bound to an IPv6
555 * wildcard address, which may match an IPv4-mapped IPv6 address.
556 */
557 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
558 #endif
559 SCTP_INP_WUNLOCK(inp);
560 return (0);
561 }
562
563 static int
sctp6_bind(struct socket * so,struct sockaddr * addr,struct thread * p)564 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
565 {
566 struct sctp_inpcb *inp;
567 struct in6pcb *inp6;
568 int error;
569 u_char vflagsav;
570
571 inp = (struct sctp_inpcb *)so->so_pcb;
572 if (inp == NULL) {
573 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
574 return (EINVAL);
575 }
576
577 if (addr) {
578 switch (addr->sa_family) {
579 #ifdef INET
580 case AF_INET:
581 if (addr->sa_len != sizeof(struct sockaddr_in)) {
582 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
583 return (EINVAL);
584 }
585 break;
586 #endif
587 #ifdef INET6
588 case AF_INET6:
589 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
590 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
591 return (EINVAL);
592 }
593 break;
594 #endif
595 default:
596 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
597 return (EINVAL);
598 }
599 }
600 inp6 = (struct in6pcb *)inp;
601 vflagsav = inp6->inp_vflag;
602 inp6->inp_vflag &= ~INP_IPV4;
603 inp6->inp_vflag |= INP_IPV6;
604 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) {
605 switch (addr->sa_family) {
606 #ifdef INET
607 case AF_INET:
608 /* binding v4 addr to v6 socket, so reset flags */
609 inp6->inp_vflag |= INP_IPV4;
610 inp6->inp_vflag &= ~INP_IPV6;
611 break;
612 #endif
613 #ifdef INET6
614 case AF_INET6:
615 {
616 struct sockaddr_in6 *sin6_p;
617
618 sin6_p = (struct sockaddr_in6 *)addr;
619
620 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
621 inp6->inp_vflag |= INP_IPV4;
622 }
623 #ifdef INET
624 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
625 struct sockaddr_in sin;
626
627 in6_sin6_2_sin(&sin, sin6_p);
628 inp6->inp_vflag |= INP_IPV4;
629 inp6->inp_vflag &= ~INP_IPV6;
630 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
631 goto out;
632 }
633 #endif
634 break;
635 }
636 #endif
637 default:
638 break;
639 }
640 } else if (addr != NULL) {
641 struct sockaddr_in6 *sin6_p;
642
643 /* IPV6_V6ONLY socket */
644 #ifdef INET
645 if (addr->sa_family == AF_INET) {
646 /* can't bind v4 addr to v6 only socket! */
647 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
648 error = EINVAL;
649 goto out;
650 }
651 #endif
652 sin6_p = (struct sockaddr_in6 *)addr;
653
654 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
655 /* can't bind v4-mapped addrs either! */
656 /* NOTE: we don't support SIIT */
657 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
658 error = EINVAL;
659 goto out;
660 }
661 }
662 error = sctp_inpcb_bind(so, addr, NULL, p);
663 out:
664 if (error != 0)
665 inp6->inp_vflag = vflagsav;
666 return (error);
667 }
668
669
670 static void
sctp6_close(struct socket * so)671 sctp6_close(struct socket *so)
672 {
673 sctp_close(so);
674 }
675
676 /* This could be made common with sctp_detach() since they are identical */
677
678 static
679 int
sctp6_disconnect(struct socket * so)680 sctp6_disconnect(struct socket *so)
681 {
682 return (sctp_disconnect(so));
683 }
684
685
686 int
687 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
688 struct mbuf *control, struct thread *p);
689
690
691 static int
sctp6_send(struct socket * so,int flags,struct mbuf * m,struct sockaddr * addr,struct mbuf * control,struct thread * p)692 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
693 struct mbuf *control, struct thread *p)
694 {
695 struct sctp_inpcb *inp;
696 struct in6pcb *inp6;
697
698 #ifdef INET
699 struct sockaddr_in6 *sin6;
700 #endif /* INET */
701 /* No SPL needed since sctp_output does this */
702
703 inp = (struct sctp_inpcb *)so->so_pcb;
704 if (inp == NULL) {
705 if (control) {
706 SCTP_RELEASE_PKT(control);
707 control = NULL;
708 }
709 SCTP_RELEASE_PKT(m);
710 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
711 return (EINVAL);
712 }
713 inp6 = (struct in6pcb *)inp;
714 /*
715 * For the TCP model we may get a NULL addr, if we are a connected
716 * socket thats ok.
717 */
718 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
719 (addr == NULL)) {
720 goto connected_type;
721 }
722 if (addr == NULL) {
723 SCTP_RELEASE_PKT(m);
724 if (control) {
725 SCTP_RELEASE_PKT(control);
726 control = NULL;
727 }
728 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
729 return (EDESTADDRREQ);
730 }
731 #ifdef INET
732 sin6 = (struct sockaddr_in6 *)addr;
733 if (SCTP_IPV6_V6ONLY(inp6)) {
734 /*
735 * if IPV6_V6ONLY flag, we discard datagrams destined to a
736 * v4 addr or v4-mapped addr
737 */
738 if (addr->sa_family == AF_INET) {
739 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
740 return (EINVAL);
741 }
742 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
743 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
744 return (EINVAL);
745 }
746 }
747 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
748 struct sockaddr_in sin;
749
750 /* convert v4-mapped into v4 addr and send */
751 in6_sin6_2_sin(&sin, sin6);
752 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
753 }
754 #endif /* INET */
755 connected_type:
756 /* now what about control */
757 if (control) {
758 if (inp->control) {
759 SCTP_PRINTF("huh? control set?\n");
760 SCTP_RELEASE_PKT(inp->control);
761 inp->control = NULL;
762 }
763 inp->control = control;
764 }
765 /* Place the data */
766 if (inp->pkt) {
767 SCTP_BUF_NEXT(inp->pkt_last) = m;
768 inp->pkt_last = m;
769 } else {
770 inp->pkt_last = inp->pkt = m;
771 }
772 if (
773 /* FreeBSD and MacOSX uses a flag passed */
774 ((flags & PRUS_MORETOCOME) == 0)
775 ) {
776 /*
777 * note with the current version this code will only be used
778 * by OpenBSD, NetBSD and FreeBSD have methods for
779 * re-defining sosend() to use sctp_sosend(). One can
780 * optionaly switch back to this code (by changing back the
781 * defininitions but this is not advisable.
782 */
783 int ret;
784
785 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
786 inp->pkt = NULL;
787 inp->control = NULL;
788 return (ret);
789 } else {
790 return (0);
791 }
792 }
793
794 static int
sctp6_connect(struct socket * so,struct sockaddr * addr,struct thread * p)795 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
796 {
797 uint32_t vrf_id;
798 int error = 0;
799 struct sctp_inpcb *inp;
800 struct sctp_tcb *stcb;
801 #ifdef INET
802 struct in6pcb *inp6;
803 struct sockaddr_in6 *sin6;
804 union sctp_sockstore store;
805 #endif
806
807 #ifdef INET
808 inp6 = (struct in6pcb *)so->so_pcb;
809 #endif
810 inp = (struct sctp_inpcb *)so->so_pcb;
811 if (inp == NULL) {
812 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
813 return (ECONNRESET); /* I made the same as TCP since we are
814 * not setup? */
815 }
816 if (addr == NULL) {
817 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
818 return (EINVAL);
819 }
820 switch (addr->sa_family) {
821 #ifdef INET
822 case AF_INET:
823 if (addr->sa_len != sizeof(struct sockaddr_in)) {
824 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
825 return (EINVAL);
826 }
827 break;
828 #endif
829 #ifdef INET6
830 case AF_INET6:
831 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
832 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
833 return (EINVAL);
834 }
835 break;
836 #endif
837 default:
838 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
839 return (EINVAL);
840 }
841
842 vrf_id = inp->def_vrf_id;
843 SCTP_ASOC_CREATE_LOCK(inp);
844 SCTP_INP_RLOCK(inp);
845 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
846 SCTP_PCB_FLAGS_UNBOUND) {
847 /* Bind a ephemeral port */
848 SCTP_INP_RUNLOCK(inp);
849 error = sctp6_bind(so, NULL, p);
850 if (error) {
851 SCTP_ASOC_CREATE_UNLOCK(inp);
852
853 return (error);
854 }
855 SCTP_INP_RLOCK(inp);
856 }
857 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
858 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
859 /* We are already connected AND the TCP model */
860 SCTP_INP_RUNLOCK(inp);
861 SCTP_ASOC_CREATE_UNLOCK(inp);
862 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
863 return (EADDRINUSE);
864 }
865 #ifdef INET
866 sin6 = (struct sockaddr_in6 *)addr;
867 if (SCTP_IPV6_V6ONLY(inp6)) {
868 /*
869 * if IPV6_V6ONLY flag, ignore connections destined to a v4
870 * addr or v4-mapped addr
871 */
872 if (addr->sa_family == AF_INET) {
873 SCTP_INP_RUNLOCK(inp);
874 SCTP_ASOC_CREATE_UNLOCK(inp);
875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
876 return (EINVAL);
877 }
878 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
879 SCTP_INP_RUNLOCK(inp);
880 SCTP_ASOC_CREATE_UNLOCK(inp);
881 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
882 return (EINVAL);
883 }
884 }
885 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
886 /* convert v4-mapped into v4 addr */
887 in6_sin6_2_sin(&store.sin, sin6);
888 addr = &store.sa;
889 }
890 #endif /* INET */
891 /* Now do we connect? */
892 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
893 stcb = LIST_FIRST(&inp->sctp_asoc_list);
894 if (stcb) {
895 SCTP_TCB_LOCK(stcb);
896 }
897 SCTP_INP_RUNLOCK(inp);
898 } else {
899 SCTP_INP_RUNLOCK(inp);
900 SCTP_INP_WLOCK(inp);
901 SCTP_INP_INCR_REF(inp);
902 SCTP_INP_WUNLOCK(inp);
903 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
904 if (stcb == NULL) {
905 SCTP_INP_WLOCK(inp);
906 SCTP_INP_DECR_REF(inp);
907 SCTP_INP_WUNLOCK(inp);
908 }
909 }
910
911 if (stcb != NULL) {
912 /* Already have or am bring up an association */
913 SCTP_ASOC_CREATE_UNLOCK(inp);
914 SCTP_TCB_UNLOCK(stcb);
915 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
916 return (EALREADY);
917 }
918 /* We are GOOD to go */
919 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
920 inp->sctp_ep.pre_open_stream_count,
921 inp->sctp_ep.port, p,
922 SCTP_INITIALIZE_AUTH_PARAMS);
923 SCTP_ASOC_CREATE_UNLOCK(inp);
924 if (stcb == NULL) {
925 /* Gak! no memory */
926 return (error);
927 }
928 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
929 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
930 /* Set the connected flag so we can queue data */
931 soisconnecting(so);
932 }
933 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
934 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
935 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
936 SCTP_TCB_UNLOCK(stcb);
937 return (error);
938 }
939
940 static int
sctp6_getaddr(struct socket * so,struct sockaddr ** addr)941 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
942 {
943 struct sockaddr_in6 *sin6;
944 struct sctp_inpcb *inp;
945 uint32_t vrf_id;
946 struct sctp_ifa *sctp_ifa;
947
948 int error;
949
950 /*
951 * Do the malloc first in case it blocks.
952 */
953 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
954 if (sin6 == NULL)
955 return (ENOMEM);
956 sin6->sin6_family = AF_INET6;
957 sin6->sin6_len = sizeof(*sin6);
958
959 inp = (struct sctp_inpcb *)so->so_pcb;
960 if (inp == NULL) {
961 SCTP_FREE_SONAME(sin6);
962 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
963 return (ECONNRESET);
964 }
965 SCTP_INP_RLOCK(inp);
966 sin6->sin6_port = inp->sctp_lport;
967 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
968 /* For the bound all case you get back 0 */
969 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
970 struct sctp_tcb *stcb;
971 struct sockaddr_in6 *sin_a6;
972 struct sctp_nets *net;
973 int fnd;
974
975 stcb = LIST_FIRST(&inp->sctp_asoc_list);
976 if (stcb == NULL) {
977 SCTP_INP_RUNLOCK(inp);
978 SCTP_FREE_SONAME(sin6);
979 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
980 return (ENOENT);
981 }
982 fnd = 0;
983 sin_a6 = NULL;
984 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
985 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
986 if (sin_a6 == NULL)
987 /* this will make coverity happy */
988 continue;
989
990 if (sin_a6->sin6_family == AF_INET6) {
991 fnd = 1;
992 break;
993 }
994 }
995 if ((!fnd) || (sin_a6 == NULL)) {
996 /* punt */
997 SCTP_INP_RUNLOCK(inp);
998 SCTP_FREE_SONAME(sin6);
999 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1000 return (ENOENT);
1001 }
1002 vrf_id = inp->def_vrf_id;
1003 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id);
1004 if (sctp_ifa) {
1005 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
1006 }
1007 } else {
1008 /* For the bound all case you get back 0 */
1009 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
1010 }
1011 } else {
1012 /* Take the first IPv6 address in the list */
1013 struct sctp_laddr *laddr;
1014 int fnd = 0;
1015
1016 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1017 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
1018 struct sockaddr_in6 *sin_a;
1019
1020 sin_a = &laddr->ifa->address.sin6;
1021 sin6->sin6_addr = sin_a->sin6_addr;
1022 fnd = 1;
1023 break;
1024 }
1025 }
1026 if (!fnd) {
1027 SCTP_FREE_SONAME(sin6);
1028 SCTP_INP_RUNLOCK(inp);
1029 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1030 return (ENOENT);
1031 }
1032 }
1033 SCTP_INP_RUNLOCK(inp);
1034 /* Scoping things for v6 */
1035 if ((error = sa6_recoverscope(sin6)) != 0) {
1036 SCTP_FREE_SONAME(sin6);
1037 return (error);
1038 }
1039 (*addr) = (struct sockaddr *)sin6;
1040 return (0);
1041 }
1042
1043 static int
sctp6_peeraddr(struct socket * so,struct sockaddr ** addr)1044 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1045 {
1046 struct sockaddr_in6 *sin6;
1047 int fnd;
1048 struct sockaddr_in6 *sin_a6;
1049 struct sctp_inpcb *inp;
1050 struct sctp_tcb *stcb;
1051 struct sctp_nets *net;
1052 int error;
1053
1054 /* Do the malloc first in case it blocks. */
1055 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1056 if (sin6 == NULL)
1057 return (ENOMEM);
1058 sin6->sin6_family = AF_INET6;
1059 sin6->sin6_len = sizeof(*sin6);
1060
1061 inp = (struct sctp_inpcb *)so->so_pcb;
1062 if ((inp == NULL) ||
1063 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
1064 /* UDP type and listeners will drop out here */
1065 SCTP_FREE_SONAME(sin6);
1066 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
1067 return (ENOTCONN);
1068 }
1069 SCTP_INP_RLOCK(inp);
1070 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1071 if (stcb) {
1072 SCTP_TCB_LOCK(stcb);
1073 }
1074 SCTP_INP_RUNLOCK(inp);
1075 if (stcb == NULL) {
1076 SCTP_FREE_SONAME(sin6);
1077 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1078 return (ECONNRESET);
1079 }
1080 fnd = 0;
1081 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1082 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1083 if (sin_a6->sin6_family == AF_INET6) {
1084 fnd = 1;
1085 sin6->sin6_port = stcb->rport;
1086 sin6->sin6_addr = sin_a6->sin6_addr;
1087 break;
1088 }
1089 }
1090 SCTP_TCB_UNLOCK(stcb);
1091 if (!fnd) {
1092 /* No IPv4 address */
1093 SCTP_FREE_SONAME(sin6);
1094 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1095 return (ENOENT);
1096 }
1097 if ((error = sa6_recoverscope(sin6)) != 0) {
1098 SCTP_FREE_SONAME(sin6);
1099 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error);
1100 return (error);
1101 }
1102 *addr = (struct sockaddr *)sin6;
1103 return (0);
1104 }
1105
1106 static int
sctp6_in6getaddr(struct socket * so,struct sockaddr ** nam)1107 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1108 {
1109 struct in6pcb *inp6 = sotoin6pcb(so);
1110 int error;
1111
1112 if (inp6 == NULL) {
1113 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1114 return (EINVAL);
1115 }
1116
1117 /* allow v6 addresses precedence */
1118 error = sctp6_getaddr(so, nam);
1119 #ifdef INET
1120 if (error) {
1121 struct sockaddr_in6 *sin6;
1122
1123 /* try v4 next if v6 failed */
1124 error = sctp_ingetaddr(so, nam);
1125 if (error) {
1126 return (error);
1127 }
1128 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1129 if (sin6 == NULL) {
1130 SCTP_FREE_SONAME(*nam);
1131 return (ENOMEM);
1132 }
1133 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1134 SCTP_FREE_SONAME(*nam);
1135 *nam = (struct sockaddr *)sin6;
1136 }
1137 #endif
1138 return (error);
1139 }
1140
1141
1142 static int
sctp6_getpeeraddr(struct socket * so,struct sockaddr ** nam)1143 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1144 {
1145 struct in6pcb *inp6 = sotoin6pcb(so);
1146 int error;
1147
1148 if (inp6 == NULL) {
1149 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1150 return (EINVAL);
1151 }
1152
1153 /* allow v6 addresses precedence */
1154 error = sctp6_peeraddr(so, nam);
1155 #ifdef INET
1156 if (error) {
1157 struct sockaddr_in6 *sin6;
1158
1159 /* try v4 next if v6 failed */
1160 error = sctp_peeraddr(so, nam);
1161 if (error) {
1162 return (error);
1163 }
1164 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1165 if (sin6 == NULL) {
1166 SCTP_FREE_SONAME(*nam);
1167 return (ENOMEM);
1168 }
1169 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1170 SCTP_FREE_SONAME(*nam);
1171 *nam = (struct sockaddr *)sin6;
1172 }
1173 #endif
1174 return (error);
1175 }
1176
1177 struct pr_usrreqs sctp6_usrreqs = {
1178 .pru_abort = sctp6_abort,
1179 .pru_accept = sctp_accept,
1180 .pru_attach = sctp6_attach,
1181 .pru_bind = sctp6_bind,
1182 .pru_connect = sctp6_connect,
1183 .pru_control = in6_control,
1184 .pru_close = sctp6_close,
1185 .pru_detach = sctp6_close,
1186 .pru_sopoll = sopoll_generic,
1187 .pru_flush = sctp_flush,
1188 .pru_disconnect = sctp6_disconnect,
1189 .pru_listen = sctp_listen,
1190 .pru_peeraddr = sctp6_getpeeraddr,
1191 .pru_send = sctp6_send,
1192 .pru_shutdown = sctp_shutdown,
1193 .pru_sockaddr = sctp6_in6getaddr,
1194 .pru_sosend = sctp_sosend,
1195 .pru_soreceive = sctp_soreceive
1196 };
1197
1198 #endif
1199