1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 *
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
17 *
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
38 #include <netinet/sctp_os.h>
39 #ifdef INET6
40 #include <sys/proc.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctp_var.h>
44 #include <netinet6/sctp6_var.h>
45 #include <netinet/sctp_sysctl.h>
46 #include <netinet/sctp_output.h>
47 #include <netinet/sctp_uio.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctputil.h>
50 #include <netinet/sctp_indata.h>
51 #include <netinet/sctp_timer.h>
52 #include <netinet/sctp_auth.h>
53 #include <netinet/sctp_input.h>
54 #include <netinet/sctp_output.h>
55 #include <netinet/sctp_bsd_addr.h>
56 #include <netinet/sctp_crc32.h>
57 #include <netinet/icmp6.h>
58 #include <netinet/udp.h>
59
60 int
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 if (m->m_len < offset) {
107 m = m_pullup(m, offset);
108 if (m == NULL) {
109 SCTP_STAT_INCR(sctps_hdrops);
110 return (IPPROTO_DONE);
111 }
112 }
113 ip6 = mtod(m, struct ip6_hdr *);
114 sh = (struct sctphdr *)(mtod(m, caddr_t)+iphlen);
115 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
116 offset -= sizeof(struct sctp_chunkhdr);
117 memset(&src, 0, sizeof(struct sockaddr_in6));
118 src.sin6_family = AF_INET6;
119 src.sin6_len = sizeof(struct sockaddr_in6);
120 src.sin6_port = sh->src_port;
121 src.sin6_addr = ip6->ip6_src;
122 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
123 goto out;
124 }
125 memset(&dst, 0, sizeof(struct sockaddr_in6));
126 dst.sin6_family = AF_INET6;
127 dst.sin6_len = sizeof(struct sockaddr_in6);
128 dst.sin6_port = sh->dest_port;
129 dst.sin6_addr = ip6->ip6_dst;
130 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
131 goto out;
132 }
133 length = ntohs(ip6->ip6_plen) + iphlen;
134 /* Validate mbuf chain length with IP payload length. */
135 if (SCTP_HEADER_LEN(m) != length) {
136 SCTPDBG(SCTP_DEBUG_INPUT1,
137 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
138 SCTP_STAT_INCR(sctps_hdrops);
139 goto out;
140 }
141 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
142 goto out;
143 }
144 ecn_bits = IPV6_TRAFFIC_CLASS(ip6);
145 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
146 SCTP_STAT_INCR(sctps_recvhwcrc);
147 compute_crc = 0;
148 } else {
149 SCTP_STAT_INCR(sctps_recvswcrc);
150 compute_crc = 1;
151 }
152 sctp_common_input_processing(&m, iphlen, offset, length,
153 (struct sockaddr *)&src,
154 (struct sockaddr *)&dst,
155 sh, ch,
156 compute_crc,
157 ecn_bits,
158 mflowtype, mflowid, fibnum,
159 vrf_id, port);
160 out:
161 if (m) {
162 sctp_m_freem(m);
163 }
164 return (IPPROTO_DONE);
165 }
166
167 int
168 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
169 {
170 return (sctp6_input_with_port(i_pak, offp, 0));
171 }
172
173 void
174 sctp6_notify(struct sctp_inpcb *inp,
175 struct sctp_tcb *stcb,
176 struct sctp_nets *net,
177 uint8_t icmp6_type,
178 uint8_t icmp6_code,
179 uint32_t next_mtu)
180 {
181 int timer_stopped;
182
183 switch (icmp6_type) {
184 case ICMP6_DST_UNREACH:
185 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) ||
186 (icmp6_code == ICMP6_DST_UNREACH_ADMIN) ||
187 (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) ||
188 (icmp6_code == ICMP6_DST_UNREACH_ADDR)) {
189 /* Mark the net unreachable. */
190 if (net->dest_state & SCTP_ADDR_REACHABLE) {
191 /* Ok that destination is not reachable */
192 net->dest_state &= ~SCTP_ADDR_REACHABLE;
193 net->dest_state &= ~SCTP_ADDR_PF;
194 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
195 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
196 }
197 }
198 SCTP_TCB_UNLOCK(stcb);
199 break;
200 case ICMP6_PARAM_PROB:
201 /* Treat it like an ABORT. */
202 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) {
203 sctp_abort_notification(stcb, true, false, 0, NULL, SCTP_SO_NOT_LOCKED);
204 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
205 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2);
206 } else {
207 SCTP_TCB_UNLOCK(stcb);
208 }
209 break;
210 case ICMP6_PACKET_TOO_BIG:
211 if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
212 SCTP_TCB_UNLOCK(stcb);
213 break;
214 }
215 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) {
216 timer_stopped = 1;
217 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
218 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1);
219 } else {
220 timer_stopped = 0;
221 }
222 /* Update the path MTU. */
223 if (net->port) {
224 next_mtu -= sizeof(struct udphdr);
225 }
226 if (net->mtu > next_mtu) {
227 net->mtu = next_mtu;
228 if (net->port) {
229 sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr));
230 } else {
231 sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu);
232 }
233 }
234 /* Update the association MTU */
235 if (stcb->asoc.smallest_mtu > next_mtu) {
236 sctp_pathmtu_adjustment(stcb, next_mtu, true);
237 }
238 /* Finally, start the PMTU timer if it was running before. */
239 if (timer_stopped) {
240 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
241 }
242 SCTP_TCB_UNLOCK(stcb);
243 break;
244 default:
245 SCTP_TCB_UNLOCK(stcb);
246 break;
247 }
248 }
249
250 void
251 sctp6_ctlinput(struct ip6ctlparam *ip6cp)
252 {
253 struct sctp_inpcb *inp;
254 struct sctp_tcb *stcb;
255 struct sctp_nets *net;
256 struct sctphdr sh;
257 struct sockaddr_in6 src, dst;
258
259 if (icmp6_errmap(ip6cp->ip6c_icmp6) == 0) {
260 return;
261 }
262
263 /*
264 * Check if we can safely examine the ports and the verification tag
265 * of the SCTP common header.
266 */
267 if (ip6cp->ip6c_m->m_pkthdr.len <
268 (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) {
269 return;
270 }
271
272 /* Copy out the port numbers and the verification tag. */
273 memset(&sh, 0, sizeof(sh));
274 m_copydata(ip6cp->ip6c_m,
275 ip6cp->ip6c_off,
276 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
277 (caddr_t)&sh);
278 memset(&src, 0, sizeof(struct sockaddr_in6));
279 src.sin6_family = AF_INET6;
280 src.sin6_len = sizeof(struct sockaddr_in6);
281 src.sin6_port = sh.src_port;
282 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
283 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
284 return;
285 }
286 memset(&dst, 0, sizeof(struct sockaddr_in6));
287 dst.sin6_family = AF_INET6;
288 dst.sin6_len = sizeof(struct sockaddr_in6);
289 dst.sin6_port = sh.dest_port;
290 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
291 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
292 return;
293 }
294 inp = NULL;
295 net = NULL;
296 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
297 (struct sockaddr *)&src,
298 &inp, &net, 1, SCTP_DEFAULT_VRFID);
299 if ((stcb != NULL) &&
300 (net != NULL) &&
301 (inp != NULL)) {
302 /* Check the verification tag */
303 if (ntohl(sh.v_tag) != 0) {
304 /*
305 * This must be the verification tag used for
306 * sending out packets. We don't consider packets
307 * reflecting the verification tag.
308 */
309 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
310 SCTP_TCB_UNLOCK(stcb);
311 return;
312 }
313 } else {
314 if (ip6cp->ip6c_m->m_pkthdr.len >=
315 ip6cp->ip6c_off + sizeof(struct sctphdr) +
316 sizeof(struct sctp_chunkhdr) +
317 offsetof(struct sctp_init, a_rwnd)) {
318 /*
319 * In this case we can check if we got an
320 * INIT chunk and if the initiate tag
321 * matches.
322 */
323 uint32_t initiate_tag;
324 uint8_t chunk_type;
325
326 m_copydata(ip6cp->ip6c_m,
327 ip6cp->ip6c_off +
328 sizeof(struct sctphdr),
329 sizeof(uint8_t),
330 (caddr_t)&chunk_type);
331 m_copydata(ip6cp->ip6c_m,
332 ip6cp->ip6c_off +
333 sizeof(struct sctphdr) +
334 sizeof(struct sctp_chunkhdr),
335 sizeof(uint32_t),
336 (caddr_t)&initiate_tag);
337 if ((chunk_type != SCTP_INITIATION) ||
338 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
339 SCTP_TCB_UNLOCK(stcb);
340 return;
341 }
342 } else {
343 SCTP_TCB_UNLOCK(stcb);
344 return;
345 }
346 }
347 sctp6_notify(inp, stcb, net,
348 ip6cp->ip6c_icmp6->icmp6_type,
349 ip6cp->ip6c_icmp6->icmp6_code,
350 ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
351 } else {
352 if ((stcb == NULL) && (inp != NULL)) {
353 /* reduce inp's ref-count */
354 SCTP_INP_WLOCK(inp);
355 SCTP_INP_DECR_REF(inp);
356 SCTP_INP_WUNLOCK(inp);
357 }
358 if (stcb) {
359 SCTP_TCB_UNLOCK(stcb);
360 }
361 }
362 }
363
364 /*
365 * this routine can probably be collasped into the one in sctp_userreq.c
366 * since they do the same thing and now we lookup with a sockaddr
367 */
368 static int
369 sctp6_getcred(SYSCTL_HANDLER_ARGS)
370 {
371 struct xucred xuc;
372 struct sockaddr_in6 addrs[2];
373 struct sctp_inpcb *inp;
374 struct sctp_nets *net;
375 struct sctp_tcb *stcb;
376 int error;
377 uint32_t vrf_id;
378
379 vrf_id = SCTP_DEFAULT_VRFID;
380
381 error = priv_check(req->td, PRIV_NETINET_GETCRED);
382 if (error)
383 return (error);
384
385 if (req->newlen != sizeof(addrs)) {
386 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
387 return (EINVAL);
388 }
389 if (req->oldlen != sizeof(struct ucred)) {
390 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
391 return (EINVAL);
392 }
393 error = SYSCTL_IN(req, addrs, sizeof(addrs));
394 if (error)
395 return (error);
396
397 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
398 sin6tosa(&addrs[0]),
399 &inp, &net, 1, vrf_id);
400 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
401 if ((inp != NULL) && (stcb == NULL)) {
402 /* reduce ref-count */
403 SCTP_INP_WLOCK(inp);
404 SCTP_INP_DECR_REF(inp);
405 goto cred_can_cont;
406 }
407 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
408 error = ENOENT;
409 goto out;
410 }
411 SCTP_TCB_UNLOCK(stcb);
412 /*
413 * We use the write lock here, only since in the error leg we need
414 * it. If we used RLOCK, then we would have to
415 * wlock/decr/unlock/rlock. Which in theory could create a hole.
416 * Better to use higher wlock.
417 */
418 SCTP_INP_WLOCK(inp);
419 cred_can_cont:
420 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
421 if (error) {
422 SCTP_INP_WUNLOCK(inp);
423 goto out;
424 }
425 cru2x(inp->sctp_socket->so_cred, &xuc);
426 SCTP_INP_WUNLOCK(inp);
427 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
428 out:
429 return (error);
430 }
431
432 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred,
433 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
434 0, 0, sctp6_getcred, "S,ucred",
435 "Get the ucred of a SCTP6 connection");
436
437 /* This is the same as the sctp_abort() could be made common */
438 static void
439 sctp6_abort(struct socket *so)
440 {
441 struct epoch_tracker et;
442 struct sctp_inpcb *inp;
443 uint32_t flags;
444
445 inp = (struct sctp_inpcb *)so->so_pcb;
446 if (inp == NULL) {
447 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
448 return;
449 }
450 NET_EPOCH_ENTER(et);
451 sctp_must_try_again:
452 flags = inp->sctp_flags;
453 #ifdef SCTP_LOG_CLOSING
454 sctp_log_closing(inp, NULL, 17);
455 #endif
456 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
457 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
458 #ifdef SCTP_LOG_CLOSING
459 sctp_log_closing(inp, NULL, 16);
460 #endif
461 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
462 SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
463 SOCK_LOCK(so);
464 SCTP_SB_CLEAR(so->so_snd);
465 /*
466 * same for the rcv ones, they are only here for the
467 * accounting/select.
468 */
469 SCTP_SB_CLEAR(so->so_rcv);
470 /* Now null out the reference, we are completely detached. */
471 so->so_pcb = NULL;
472 SOCK_UNLOCK(so);
473 } else {
474 flags = inp->sctp_flags;
475 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
476 goto sctp_must_try_again;
477 }
478 }
479 NET_EPOCH_EXIT(et);
480 return;
481 }
482
483 static int
484 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
485 {
486 int error;
487 struct sctp_inpcb *inp;
488 uint32_t vrf_id = SCTP_DEFAULT_VRFID;
489
490 inp = (struct sctp_inpcb *)so->so_pcb;
491 if (inp != NULL) {
492 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
493 return (EINVAL);
494 }
495
496 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
497 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
498 if (error)
499 return (error);
500 }
501 error = sctp_inpcb_alloc(so, vrf_id);
502 if (error)
503 return (error);
504 inp = (struct sctp_inpcb *)so->so_pcb;
505 SCTP_INP_WLOCK(inp);
506 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */
507
508 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
509 inp->ip_inp.inp.in6p_hops = -1; /* use kernel default */
510 inp->ip_inp.inp.in6p_cksum = -1; /* just to be sure */
511 #ifdef INET
512 /*
513 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
514 * socket as well, because the socket may be bound to an IPv6
515 * wildcard address, which may match an IPv4-mapped IPv6 address.
516 */
517 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
518 #endif
519 SCTP_INP_WUNLOCK(inp);
520 return (0);
521 }
522
523 static int
524 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
525 {
526 struct sctp_inpcb *inp;
527 int error;
528 u_char vflagsav;
529
530 inp = (struct sctp_inpcb *)so->so_pcb;
531 if (inp == NULL) {
532 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
533 return (EINVAL);
534 }
535
536 if (addr) {
537 switch (addr->sa_family) {
538 #ifdef INET
539 case AF_INET:
540 if (addr->sa_len != sizeof(struct sockaddr_in)) {
541 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
542 return (EINVAL);
543 }
544 break;
545 #endif
546 #ifdef INET6
547 case AF_INET6:
548 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
549 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
550 return (EINVAL);
551 }
552 break;
553 #endif
554 default:
555 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
556 return (EINVAL);
557 }
558 }
559 vflagsav = inp->ip_inp.inp.inp_vflag;
560 inp->ip_inp.inp.inp_vflag &= ~INP_IPV4;
561 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
562 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp) == 0)) {
563 switch (addr->sa_family) {
564 #ifdef INET
565 case AF_INET:
566 /* binding v4 addr to v6 socket, so reset flags */
567 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
568 inp->ip_inp.inp.inp_vflag &= ~INP_IPV6;
569 break;
570 #endif
571 #ifdef INET6
572 case AF_INET6:
573 {
574 struct sockaddr_in6 *sin6_p;
575
576 sin6_p = (struct sockaddr_in6 *)addr;
577
578 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
579 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
580 }
581 #ifdef INET
582 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
583 struct sockaddr_in sin;
584
585 in6_sin6_2_sin(&sin, sin6_p);
586 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
587 inp->ip_inp.inp.inp_vflag &= ~INP_IPV6;
588 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
589 goto out;
590 }
591 #endif
592 break;
593 }
594 #endif
595 default:
596 break;
597 }
598 } else if (addr != NULL) {
599 struct sockaddr_in6 *sin6_p;
600
601 /* IPV6_V6ONLY socket */
602 #ifdef INET
603 if (addr->sa_family == AF_INET) {
604 /* can't bind v4 addr to v6 only socket! */
605 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
606 error = EINVAL;
607 goto out;
608 }
609 #endif
610 sin6_p = (struct sockaddr_in6 *)addr;
611
612 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
613 /* can't bind v4-mapped addrs either! */
614 /* NOTE: we don't support SIIT */
615 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
616 error = EINVAL;
617 goto out;
618 }
619 }
620 error = sctp_inpcb_bind(so, addr, NULL, p);
621 out:
622 if (error != 0)
623 inp->ip_inp.inp.inp_vflag = vflagsav;
624 return (error);
625 }
626
627 static void
628 sctp6_close(struct socket *so)
629 {
630 sctp_close(so);
631 }
632
633 /* This could be made common with sctp_detach() since they are identical */
634
635 static
636 int
637 sctp6_disconnect(struct socket *so)
638 {
639 return (sctp_disconnect(so));
640 }
641
642 int
643 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
644 struct mbuf *control, struct thread *p);
645
646 static int
647 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
648 struct mbuf *control, struct thread *p)
649 {
650 struct sctp_inpcb *inp;
651
652 #ifdef INET
653 struct sockaddr_in6 *sin6;
654 #endif /* INET */
655 /* No SPL needed since sctp_output does this */
656
657 inp = (struct sctp_inpcb *)so->so_pcb;
658 if (inp == NULL) {
659 if (control) {
660 SCTP_RELEASE_PKT(control);
661 control = NULL;
662 }
663 SCTP_RELEASE_PKT(m);
664 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
665 return (EINVAL);
666 }
667 /*
668 * For the TCP model we may get a NULL addr, if we are a connected
669 * socket thats ok.
670 */
671 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
672 (addr == NULL)) {
673 goto connected_type;
674 }
675 if (addr == NULL) {
676 SCTP_RELEASE_PKT(m);
677 if (control) {
678 SCTP_RELEASE_PKT(control);
679 control = NULL;
680 }
681 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
682 return (EDESTADDRREQ);
683 }
684 switch (addr->sa_family) {
685 #ifdef INET
686 case AF_INET:
687 if (addr->sa_len != sizeof(struct sockaddr_in)) {
688 if (control) {
689 SCTP_RELEASE_PKT(control);
690 control = NULL;
691 }
692 SCTP_RELEASE_PKT(m);
693 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
694 return (EINVAL);
695 }
696 break;
697 #endif
698 #ifdef INET6
699 case AF_INET6:
700 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
701 if (control) {
702 SCTP_RELEASE_PKT(control);
703 control = NULL;
704 }
705 SCTP_RELEASE_PKT(m);
706 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
707 return (EINVAL);
708 }
709 break;
710 #endif
711 default:
712 if (control) {
713 SCTP_RELEASE_PKT(control);
714 control = NULL;
715 }
716 SCTP_RELEASE_PKT(m);
717 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
718 return (EINVAL);
719 }
720 #ifdef INET
721 sin6 = (struct sockaddr_in6 *)addr;
722 if (SCTP_IPV6_V6ONLY(inp)) {
723 /*
724 * if IPV6_V6ONLY flag, we discard datagrams destined to a
725 * v4 addr or v4-mapped addr
726 */
727 if (addr->sa_family == AF_INET) {
728 if (control) {
729 SCTP_RELEASE_PKT(control);
730 control = NULL;
731 }
732 SCTP_RELEASE_PKT(m);
733 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
734 return (EINVAL);
735 }
736 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
737 if (control) {
738 SCTP_RELEASE_PKT(control);
739 control = NULL;
740 }
741 SCTP_RELEASE_PKT(m);
742 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
743 return (EINVAL);
744 }
745 }
746 if ((addr->sa_family == AF_INET6) &&
747 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 struct epoch_tracker et;
784 int ret;
785
786 NET_EPOCH_ENTER(et);
787 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
788 NET_EPOCH_EXIT(et);
789 inp->pkt = NULL;
790 inp->control = NULL;
791 return (ret);
792 } else {
793 return (0);
794 }
795 }
796
797 static int
798 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
799 {
800 struct epoch_tracker et;
801 uint32_t vrf_id;
802 int error = 0;
803 struct sctp_inpcb *inp;
804 struct sctp_tcb *stcb;
805 #ifdef INET
806 struct sockaddr_in6 *sin6;
807 union sctp_sockstore store;
808 #endif
809
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(inp)) {
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 ((addr->sa_family == AF_INET6) &&
886 IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
887 /* convert v4-mapped into v4 addr */
888 in6_sin6_2_sin(&store.sin, sin6);
889 addr = &store.sa;
890 }
891 #endif /* INET */
892 /* Now do we connect? */
893 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
894 stcb = LIST_FIRST(&inp->sctp_asoc_list);
895 if (stcb) {
896 SCTP_TCB_LOCK(stcb);
897 }
898 SCTP_INP_RUNLOCK(inp);
899 } else {
900 SCTP_INP_RUNLOCK(inp);
901 SCTP_INP_WLOCK(inp);
902 SCTP_INP_INCR_REF(inp);
903 SCTP_INP_WUNLOCK(inp);
904 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
905 if (stcb == NULL) {
906 SCTP_INP_WLOCK(inp);
907 SCTP_INP_DECR_REF(inp);
908 SCTP_INP_WUNLOCK(inp);
909 }
910 }
911
912 if (stcb != NULL) {
913 /* Already have or am bring up an association */
914 SCTP_ASOC_CREATE_UNLOCK(inp);
915 SCTP_TCB_UNLOCK(stcb);
916 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
917 return (EALREADY);
918 }
919 /* We are GOOD to go */
920 stcb = sctp_aloc_assoc_connected(inp, addr, &error, 0, 0, vrf_id,
921 inp->sctp_ep.pre_open_stream_count,
922 inp->sctp_ep.port, p,
923 SCTP_INITIALIZE_AUTH_PARAMS);
924 SCTP_ASOC_CREATE_UNLOCK(inp);
925 if (stcb == NULL) {
926 /* Gak! no memory */
927 return (error);
928 }
929 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
930 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
931 NET_EPOCH_ENTER(et);
932 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
933 SCTP_TCB_UNLOCK(stcb);
934 NET_EPOCH_EXIT(et);
935 return (error);
936 }
937
938 static int
939 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
940 {
941 struct sockaddr_in6 *sin6;
942 struct sctp_inpcb *inp;
943 uint32_t vrf_id;
944 struct sctp_ifa *sctp_ifa;
945
946 int error;
947
948 /*
949 * Do the malloc first in case it blocks.
950 */
951 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
952 if (sin6 == NULL)
953 return (ENOMEM);
954 sin6->sin6_family = AF_INET6;
955 sin6->sin6_len = sizeof(*sin6);
956
957 inp = (struct sctp_inpcb *)so->so_pcb;
958 if (inp == NULL) {
959 SCTP_FREE_SONAME(sin6);
960 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
961 return (ECONNRESET);
962 }
963 SCTP_INP_RLOCK(inp);
964 sin6->sin6_port = inp->sctp_lport;
965 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
966 /* For the bound all case you get back 0 */
967 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
968 struct sctp_tcb *stcb;
969 struct sockaddr_in6 *sin_a6;
970 struct sctp_nets *net;
971 int fnd;
972
973 stcb = LIST_FIRST(&inp->sctp_asoc_list);
974 if (stcb == NULL) {
975 SCTP_INP_RUNLOCK(inp);
976 SCTP_FREE_SONAME(sin6);
977 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
978 return (ENOENT);
979 }
980 fnd = 0;
981 sin_a6 = NULL;
982 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
983 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
984 if (sin_a6 == NULL)
985 /* this will make coverity happy */
986 continue;
987
988 if (sin_a6->sin6_family == AF_INET6) {
989 fnd = 1;
990 break;
991 }
992 }
993 if ((!fnd) || (sin_a6 == NULL)) {
994 /* punt */
995 SCTP_INP_RUNLOCK(inp);
996 SCTP_FREE_SONAME(sin6);
997 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
998 return (ENOENT);
999 }
1000 vrf_id = inp->def_vrf_id;
1001 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id);
1002 if (sctp_ifa) {
1003 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
1004 }
1005 } else {
1006 /* For the bound all case you get back 0 */
1007 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
1008 }
1009 } else {
1010 /* Take the first IPv6 address in the list */
1011 struct sctp_laddr *laddr;
1012 int fnd = 0;
1013
1014 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1015 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
1016 struct sockaddr_in6 *sin_a;
1017
1018 sin_a = &laddr->ifa->address.sin6;
1019 sin6->sin6_addr = sin_a->sin6_addr;
1020 fnd = 1;
1021 break;
1022 }
1023 }
1024 if (!fnd) {
1025 SCTP_FREE_SONAME(sin6);
1026 SCTP_INP_RUNLOCK(inp);
1027 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1028 return (ENOENT);
1029 }
1030 }
1031 SCTP_INP_RUNLOCK(inp);
1032 /* Scoping things for v6 */
1033 if ((error = sa6_recoverscope(sin6)) != 0) {
1034 SCTP_FREE_SONAME(sin6);
1035 return (error);
1036 }
1037 (*addr) = (struct sockaddr *)sin6;
1038 return (0);
1039 }
1040
1041 static int
1042 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1043 {
1044 struct sockaddr_in6 *sin6;
1045 int fnd;
1046 struct sockaddr_in6 *sin_a6;
1047 struct sctp_inpcb *inp;
1048 struct sctp_tcb *stcb;
1049 struct sctp_nets *net;
1050 int error;
1051
1052 /* Do the malloc first in case it blocks. */
1053 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1054 if (sin6 == NULL)
1055 return (ENOMEM);
1056 sin6->sin6_family = AF_INET6;
1057 sin6->sin6_len = sizeof(*sin6);
1058
1059 inp = (struct sctp_inpcb *)so->so_pcb;
1060 if ((inp == NULL) ||
1061 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
1062 /* UDP type and listeners will drop out here */
1063 SCTP_FREE_SONAME(sin6);
1064 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
1065 return (ENOTCONN);
1066 }
1067 SCTP_INP_RLOCK(inp);
1068 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1069 if (stcb) {
1070 SCTP_TCB_LOCK(stcb);
1071 }
1072 SCTP_INP_RUNLOCK(inp);
1073 if (stcb == NULL) {
1074 SCTP_FREE_SONAME(sin6);
1075 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1076 return (ECONNRESET);
1077 }
1078 fnd = 0;
1079 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1080 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1081 if (sin_a6->sin6_family == AF_INET6) {
1082 fnd = 1;
1083 sin6->sin6_port = stcb->rport;
1084 sin6->sin6_addr = sin_a6->sin6_addr;
1085 break;
1086 }
1087 }
1088 SCTP_TCB_UNLOCK(stcb);
1089 if (!fnd) {
1090 /* No IPv4 address */
1091 SCTP_FREE_SONAME(sin6);
1092 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1093 return (ENOENT);
1094 }
1095 if ((error = sa6_recoverscope(sin6)) != 0) {
1096 SCTP_FREE_SONAME(sin6);
1097 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error);
1098 return (error);
1099 }
1100 *addr = (struct sockaddr *)sin6;
1101 return (0);
1102 }
1103
1104 static int
1105 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1106 {
1107 struct inpcb *inp = sotoinpcb(so);
1108 int error;
1109
1110 if (inp == NULL) {
1111 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1112 return (EINVAL);
1113 }
1114
1115 /* allow v6 addresses precedence */
1116 error = sctp6_getaddr(so, nam);
1117 #ifdef INET
1118 if (error) {
1119 struct sockaddr_in6 *sin6;
1120
1121 /* try v4 next if v6 failed */
1122 error = sctp_ingetaddr(so, nam);
1123 if (error) {
1124 return (error);
1125 }
1126 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1127 if (sin6 == NULL) {
1128 SCTP_FREE_SONAME(*nam);
1129 return (ENOMEM);
1130 }
1131 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1132 SCTP_FREE_SONAME(*nam);
1133 *nam = (struct sockaddr *)sin6;
1134 }
1135 #endif
1136 return (error);
1137 }
1138
1139 static int
1140 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1141 {
1142 struct inpcb *inp = sotoinpcb(so);
1143 int error;
1144
1145 if (inp == NULL) {
1146 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1147 return (EINVAL);
1148 }
1149
1150 /* allow v6 addresses precedence */
1151 error = sctp6_peeraddr(so, nam);
1152 #ifdef INET
1153 if (error) {
1154 struct sockaddr_in6 *sin6;
1155
1156 /* try v4 next if v6 failed */
1157 error = sctp_peeraddr(so, nam);
1158 if (error) {
1159 return (error);
1160 }
1161 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1162 if (sin6 == NULL) {
1163 SCTP_FREE_SONAME(*nam);
1164 return (ENOMEM);
1165 }
1166 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1167 SCTP_FREE_SONAME(*nam);
1168 *nam = (struct sockaddr *)sin6;
1169 }
1170 #endif
1171 return (error);
1172 }
1173
1174 #define SCTP6_PROTOSW \
1175 .pr_protocol = IPPROTO_SCTP, \
1176 .pr_ctloutput = sctp_ctloutput, \
1177 .pr_abort = sctp6_abort, \
1178 .pr_accept = sctp_accept, \
1179 .pr_attach = sctp6_attach, \
1180 .pr_bind = sctp6_bind, \
1181 .pr_connect = sctp6_connect, \
1182 .pr_control = in6_control, \
1183 .pr_close = sctp6_close, \
1184 .pr_detach = sctp6_close, \
1185 .pr_sopoll = sopoll_generic, \
1186 .pr_flush = sctp_flush, \
1187 .pr_disconnect = sctp6_disconnect, \
1188 .pr_listen = sctp_listen, \
1189 .pr_peeraddr = sctp6_getpeeraddr, \
1190 .pr_send = sctp6_send, \
1191 .pr_shutdown = sctp_shutdown, \
1192 .pr_sockaddr = sctp6_in6getaddr, \
1193 .pr_sosend = sctp_sosend, \
1194 .pr_soreceive = sctp_soreceive
1195
1196 struct protosw sctp6_seqpacket_protosw = {
1197 .pr_type = SOCK_SEQPACKET,
1198 .pr_flags = PR_WANTRCVD,
1199 SCTP6_PROTOSW
1200 };
1201
1202 struct protosw sctp6_stream_protosw = {
1203 .pr_type = SOCK_STREAM,
1204 .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD,
1205 SCTP6_PROTOSW
1206 };
1207 #endif
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