]> CyberLeo.Net >> Repos - FreeBSD/releng/10.2.git/blob - sys/netinet6/sctp6_usrreq.c
o Fix filemon and bmake meta-mode stability issues. [EN-16:01]
[FreeBSD/releng/10.2.git] / sys / netinet6 / sctp6_usrreq.c
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 #ifdef INET6
43 #include <netinet6/sctp6_var.h>
44 #endif
45 #include <netinet/sctp_sysctl.h>
46 #include <netinet/sctp_output.h>
47 #include <netinet/sctp_uio.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctputil.h>
50 #include <netinet/sctp_indata.h>
51 #include <netinet/sctp_timer.h>
52 #include <netinet/sctp_auth.h>
53 #include <netinet/sctp_input.h>
54 #include <netinet/sctp_output.h>
55 #include <netinet/sctp_bsd_addr.h>
56 #include <netinet/sctp_crc32.h>
57 #include <netinet/udp.h>
58
59 #ifdef IPSEC
60 #include <netipsec/ipsec.h>
61 #ifdef INET6
62 #include <netipsec/ipsec6.h>
63 #endif                          /* INET6 */
64 #endif                          /* IPSEC */
65
66 extern struct protosw inetsw[];
67
68 int
69 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port)
70 {
71         struct mbuf *m;
72         int iphlen;
73         uint32_t vrf_id;
74         uint8_t ecn_bits;
75         struct sockaddr_in6 src, dst;
76         struct ip6_hdr *ip6;
77         struct sctphdr *sh;
78         struct sctp_chunkhdr *ch;
79         int length, offset;
80
81 #if !defined(SCTP_WITH_NO_CSUM)
82         uint8_t compute_crc;
83
84 #endif
85         uint32_t mflowid;
86         uint8_t mflowtype;
87         uint16_t fibnum;
88
89         iphlen = *offp;
90         if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) {
91                 SCTP_RELEASE_PKT(*i_pak);
92                 return (IPPROTO_DONE);
93         }
94         m = SCTP_HEADER_TO_CHAIN(*i_pak);
95 #ifdef SCTP_MBUF_LOGGING
96         /* Log in any input mbufs */
97         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
98                 sctp_log_mbc(m, SCTP_MBUF_INPUT);
99         }
100 #endif
101 #ifdef SCTP_PACKET_LOGGING
102         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
103                 sctp_packet_log(m);
104         }
105 #endif
106         SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
107             "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
108             m->m_pkthdr.len,
109             if_name(m->m_pkthdr.rcvif),
110             (int)m->m_pkthdr.csum_flags, CSUM_BITS);
111         mflowid = m->m_pkthdr.flowid;
112         mflowtype = M_HASHTYPE_GET(m);
113         fibnum = M_GETFIB(m);
114         SCTP_STAT_INCR(sctps_recvpackets);
115         SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
116         /* Get IP, SCTP, and first chunk header together in the first mbuf. */
117         offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
118         ip6 = mtod(m, struct ip6_hdr *);
119         IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen,
120             (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)));
121         if (sh == NULL) {
122                 SCTP_STAT_INCR(sctps_hdrops);
123                 return (IPPROTO_DONE);
124         }
125         ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
126         offset -= sizeof(struct sctp_chunkhdr);
127         memset(&src, 0, sizeof(struct sockaddr_in6));
128         src.sin6_family = AF_INET6;
129         src.sin6_len = sizeof(struct sockaddr_in6);
130         src.sin6_port = sh->src_port;
131         src.sin6_addr = ip6->ip6_src;
132         if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
133                 goto out;
134         }
135         memset(&dst, 0, sizeof(struct sockaddr_in6));
136         dst.sin6_family = AF_INET6;
137         dst.sin6_len = sizeof(struct sockaddr_in6);
138         dst.sin6_port = sh->dest_port;
139         dst.sin6_addr = ip6->ip6_dst;
140         if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
141                 goto out;
142         }
143         if (faithprefix_p != NULL && (*faithprefix_p) (&dst.sin6_addr)) {
144                 /* XXX send icmp6 host/port unreach? */
145                 goto out;
146         }
147         length = ntohs(ip6->ip6_plen) + iphlen;
148         /* Validate mbuf chain length with IP payload length. */
149         if (SCTP_HEADER_LEN(m) != length) {
150                 SCTPDBG(SCTP_DEBUG_INPUT1,
151                     "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
152                 SCTP_STAT_INCR(sctps_hdrops);
153                 goto out;
154         }
155         if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
156                 goto out;
157         }
158         ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
159 #if defined(SCTP_WITH_NO_CSUM)
160         SCTP_STAT_INCR(sctps_recvnocrc);
161 #else
162         if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
163                 SCTP_STAT_INCR(sctps_recvhwcrc);
164                 compute_crc = 0;
165         } else {
166                 SCTP_STAT_INCR(sctps_recvswcrc);
167                 compute_crc = 1;
168         }
169 #endif
170         sctp_common_input_processing(&m, iphlen, offset, length,
171             (struct sockaddr *)&src,
172             (struct sockaddr *)&dst,
173             sh, ch,
174 #if !defined(SCTP_WITH_NO_CSUM)
175             compute_crc,
176 #endif
177             ecn_bits,
178             mflowtype, mflowid, fibnum,
179             vrf_id, port);
180 out:
181         if (m) {
182                 sctp_m_freem(m);
183         }
184         return (IPPROTO_DONE);
185 }
186
187
188 int
189 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
190 {
191         return (sctp6_input_with_port(i_pak, offp, 0));
192 }
193
194 static void
195 sctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6,
196     struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net)
197 {
198         uint32_t nxtsz;
199
200         if ((inp == NULL) || (stcb == NULL) || (net == NULL) ||
201             (icmp6 == NULL) || (sh == NULL)) {
202                 goto out;
203         }
204         /* First do we even look at it? */
205         if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag))
206                 goto out;
207
208         if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) {
209                 /* not PACKET TO BIG */
210                 goto out;
211         }
212         /*
213          * ok we need to look closely. We could even get smarter and look at
214          * anyone that we sent to in case we get a different ICMP that tells
215          * us there is no way to reach a host, but for this impl, all we
216          * care about is MTU discovery.
217          */
218         nxtsz = ntohl(icmp6->icmp6_mtu);
219         /* Stop any PMTU timer */
220         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL,
221             SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1);
222
223         /* Adjust destination size limit */
224         if (net->mtu > nxtsz) {
225                 net->mtu = nxtsz;
226                 if (net->port) {
227                         net->mtu -= sizeof(struct udphdr);
228                 }
229         }
230         /* now what about the ep? */
231         if (stcb->asoc.smallest_mtu > nxtsz) {
232                 struct sctp_tmit_chunk *chk;
233
234                 /* Adjust that too */
235                 stcb->asoc.smallest_mtu = nxtsz;
236                 /* now off to subtract IP_DF flag if needed */
237
238                 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) {
239                         if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) {
240                                 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
241                         }
242                 }
243                 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
244                         if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) {
245                                 /*
246                                  * For this guy we also mark for immediate
247                                  * resend since we sent to big of chunk
248                                  */
249                                 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
250                                 if (chk->sent != SCTP_DATAGRAM_RESEND)
251                                         stcb->asoc.sent_queue_retran_cnt++;
252                                 chk->sent = SCTP_DATAGRAM_RESEND;
253                                 chk->rec.data.doing_fast_retransmit = 0;
254
255                                 chk->sent = SCTP_DATAGRAM_RESEND;
256                                 /* Clear any time so NO RTT is being done */
257                                 chk->sent_rcv_time.tv_sec = 0;
258                                 chk->sent_rcv_time.tv_usec = 0;
259                                 stcb->asoc.total_flight -= chk->send_size;
260                                 net->flight_size -= chk->send_size;
261                         }
262                 }
263         }
264         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL);
265 out:
266         if (stcb) {
267                 SCTP_TCB_UNLOCK(stcb);
268         }
269 }
270
271
272 void
273 sctp6_notify(struct sctp_inpcb *inp,
274     struct icmp6_hdr *icmph,
275     struct sctphdr *sh,
276     struct sockaddr *to,
277     struct sctp_tcb *stcb,
278     struct sctp_nets *net)
279 {
280 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
281         struct socket *so;
282
283 #endif
284
285         /* protection */
286         if ((inp == NULL) || (stcb == NULL) || (net == NULL) ||
287             (sh == NULL) || (to == NULL)) {
288                 if (stcb)
289                         SCTP_TCB_UNLOCK(stcb);
290                 return;
291         }
292         /* First job is to verify the vtag matches what I would send */
293         if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) {
294                 SCTP_TCB_UNLOCK(stcb);
295                 return;
296         }
297         if (icmph->icmp6_type != ICMP_UNREACH) {
298                 /* We only care about unreachable */
299                 SCTP_TCB_UNLOCK(stcb);
300                 return;
301         }
302         if ((icmph->icmp6_code == ICMP_UNREACH_NET) ||
303             (icmph->icmp6_code == ICMP_UNREACH_HOST) ||
304             (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) ||
305             (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) ||
306             (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) ||
307             (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) ||
308             (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) ||
309             (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) {
310
311                 /*
312                  * Hmm reachablity problems we must examine closely. If its
313                  * not reachable, we may have lost a network. Or if there is
314                  * NO protocol at the other end named SCTP. well we consider
315                  * it a OOTB abort.
316                  */
317                 if (net->dest_state & SCTP_ADDR_REACHABLE) {
318                         /* Ok that destination is NOT reachable */
319                         net->dest_state &= ~SCTP_ADDR_REACHABLE;
320                         net->dest_state &= ~SCTP_ADDR_PF;
321                         sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
322                             stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
323                 }
324                 SCTP_TCB_UNLOCK(stcb);
325         } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) ||
326             (icmph->icmp6_code == ICMP_UNREACH_PORT)) {
327                 /*
328                  * Here the peer is either playing tricks on us, including
329                  * an address that belongs to someone who does not support
330                  * SCTP OR was a userland implementation that shutdown and
331                  * now is dead. In either case treat it like a OOTB abort
332                  * with no TCB
333                  */
334                 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED);
335 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
336                 so = SCTP_INP_SO(inp);
337                 atomic_add_int(&stcb->asoc.refcnt, 1);
338                 SCTP_TCB_UNLOCK(stcb);
339                 SCTP_SOCKET_LOCK(so, 1);
340                 SCTP_TCB_LOCK(stcb);
341                 atomic_subtract_int(&stcb->asoc.refcnt, 1);
342 #endif
343                 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
344                     SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2);
345 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
346                 SCTP_SOCKET_UNLOCK(so, 1);
347                 /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */
348 #endif
349                 /* no need to unlock here, since the TCB is gone */
350         } else {
351                 SCTP_TCB_UNLOCK(stcb);
352         }
353 }
354
355
356
357 void
358 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
359 {
360         struct sctphdr sh;
361         struct ip6ctlparam *ip6cp = NULL;
362         uint32_t vrf_id;
363
364         vrf_id = SCTP_DEFAULT_VRFID;
365
366         if (pktdst->sa_family != AF_INET6 ||
367             pktdst->sa_len != sizeof(struct sockaddr_in6))
368                 return;
369
370         if ((unsigned)cmd >= PRC_NCMDS)
371                 return;
372         if (PRC_IS_REDIRECT(cmd)) {
373                 d = NULL;
374         } else if (inet6ctlerrmap[cmd] == 0) {
375                 return;
376         }
377         /* if the parameter is from icmp6, decode it. */
378         if (d != NULL) {
379                 ip6cp = (struct ip6ctlparam *)d;
380         } else {
381                 ip6cp = (struct ip6ctlparam *)NULL;
382         }
383
384         if (ip6cp) {
385                 /*
386                  * XXX: We assume that when IPV6 is non NULL, M and OFF are
387                  * valid.
388                  */
389                 struct sctp_inpcb *inp = NULL;
390                 struct sctp_tcb *stcb = NULL;
391                 struct sctp_nets *net = NULL;
392                 struct sockaddr_in6 final;
393
394                 if (ip6cp->ip6c_m == NULL)
395                         return;
396
397                 /* Check if we can safely examine the SCTP header. */
398                 if (ip6cp->ip6c_m->m_pkthdr.len < ip6cp->ip6c_off + sizeof(sh))
399                         return;
400
401                 bzero(&sh, sizeof(sh));
402                 bzero(&final, sizeof(final));
403                 inp = NULL;
404                 net = NULL;
405                 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh),
406                     (caddr_t)&sh);
407                 ip6cp->ip6c_src->sin6_port = sh.src_port;
408                 final.sin6_len = sizeof(final);
409                 final.sin6_family = AF_INET6;
410                 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr;
411                 final.sin6_port = sh.dest_port;
412                 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&final,
413                     (struct sockaddr *)ip6cp->ip6c_src,
414                     &inp, &net, 1, vrf_id);
415                 /* inp's ref-count increased && stcb locked */
416                 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) {
417                         if (cmd == PRC_MSGSIZE) {
418                                 sctp6_notify_mbuf(inp,
419                                     ip6cp->ip6c_icmp6,
420                                     &sh,
421                                     stcb,
422                                     net);
423                                 /* inp's ref-count reduced && stcb unlocked */
424                         } else {
425                                 sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh,
426                                     (struct sockaddr *)&final,
427                                     stcb, net);
428                                 /* inp's ref-count reduced && stcb unlocked */
429                         }
430                 } else {
431                         if (PRC_IS_REDIRECT(cmd) && inp) {
432                                 in6_rtchange((struct in6pcb *)inp,
433                                     inet6ctlerrmap[cmd]);
434                         }
435                         if (inp) {
436                                 /* reduce inp's ref-count */
437                                 SCTP_INP_WLOCK(inp);
438                                 SCTP_INP_DECR_REF(inp);
439                                 SCTP_INP_WUNLOCK(inp);
440                         }
441                         if (stcb)
442                                 SCTP_TCB_UNLOCK(stcb);
443                 }
444         }
445 }
446
447 /*
448  * this routine can probably be collasped into the one in sctp_userreq.c
449  * since they do the same thing and now we lookup with a sockaddr
450  */
451 static int
452 sctp6_getcred(SYSCTL_HANDLER_ARGS)
453 {
454         struct xucred xuc;
455         struct sockaddr_in6 addrs[2];
456         struct sctp_inpcb *inp;
457         struct sctp_nets *net;
458         struct sctp_tcb *stcb;
459         int error;
460         uint32_t vrf_id;
461
462         vrf_id = SCTP_DEFAULT_VRFID;
463
464         error = priv_check(req->td, PRIV_NETINET_GETCRED);
465         if (error)
466                 return (error);
467
468         if (req->newlen != sizeof(addrs)) {
469                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
470                 return (EINVAL);
471         }
472         if (req->oldlen != sizeof(struct ucred)) {
473                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
474                 return (EINVAL);
475         }
476         error = SYSCTL_IN(req, addrs, sizeof(addrs));
477         if (error)
478                 return (error);
479
480         stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
481             sin6tosa(&addrs[0]),
482             &inp, &net, 1, vrf_id);
483         if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
484                 if ((inp != NULL) && (stcb == NULL)) {
485                         /* reduce ref-count */
486                         SCTP_INP_WLOCK(inp);
487                         SCTP_INP_DECR_REF(inp);
488                         goto cred_can_cont;
489                 }
490                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
491                 error = ENOENT;
492                 goto out;
493         }
494         SCTP_TCB_UNLOCK(stcb);
495         /*
496          * We use the write lock here, only since in the error leg we need
497          * it. If we used RLOCK, then we would have to
498          * wlock/decr/unlock/rlock. Which in theory could create a hole.
499          * Better to use higher wlock.
500          */
501         SCTP_INP_WLOCK(inp);
502 cred_can_cont:
503         error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
504         if (error) {
505                 SCTP_INP_WUNLOCK(inp);
506                 goto out;
507         }
508         cru2x(inp->sctp_socket->so_cred, &xuc);
509         SCTP_INP_WUNLOCK(inp);
510         error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
511 out:
512         return (error);
513 }
514
515 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
516     0, 0,
517     sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
518
519
520 /* This is the same as the sctp_abort() could be made common */
521 static void
522 sctp6_abort(struct socket *so)
523 {
524         struct sctp_inpcb *inp;
525         uint32_t flags;
526
527         inp = (struct sctp_inpcb *)so->so_pcb;
528         if (inp == NULL) {
529                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
530                 return;
531         }
532 sctp_must_try_again:
533         flags = inp->sctp_flags;
534 #ifdef SCTP_LOG_CLOSING
535         sctp_log_closing(inp, NULL, 17);
536 #endif
537         if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
538             (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
539 #ifdef SCTP_LOG_CLOSING
540                 sctp_log_closing(inp, NULL, 16);
541 #endif
542                 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
543                     SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
544                 SOCK_LOCK(so);
545                 SCTP_SB_CLEAR(so->so_snd);
546                 /*
547                  * same for the rcv ones, they are only here for the
548                  * accounting/select.
549                  */
550                 SCTP_SB_CLEAR(so->so_rcv);
551                 /* Now null out the reference, we are completely detached. */
552                 so->so_pcb = NULL;
553                 SOCK_UNLOCK(so);
554         } else {
555                 flags = inp->sctp_flags;
556                 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
557                         goto sctp_must_try_again;
558                 }
559         }
560         return;
561 }
562
563 static int
564 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
565 {
566         struct in6pcb *inp6;
567         int error;
568         struct sctp_inpcb *inp;
569         uint32_t vrf_id = SCTP_DEFAULT_VRFID;
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         if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
577                 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
578                 if (error)
579                         return (error);
580         }
581         error = sctp_inpcb_alloc(so, vrf_id);
582         if (error)
583                 return (error);
584         inp = (struct sctp_inpcb *)so->so_pcb;
585         SCTP_INP_WLOCK(inp);
586         inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6;     /* I'm v6! */
587         inp6 = (struct in6pcb *)inp;
588
589         inp6->inp_vflag |= INP_IPV6;
590         inp6->in6p_hops = -1;   /* use kernel default */
591         inp6->in6p_cksum = -1;  /* just to be sure */
592 #ifdef INET
593         /*
594          * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
595          * socket as well, because the socket may be bound to an IPv6
596          * wildcard address, which may match an IPv4-mapped IPv6 address.
597          */
598         inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
599 #endif
600         /*
601          * Hmm what about the IPSEC stuff that is missing here but in
602          * sctp_attach()?
603          */
604         SCTP_INP_WUNLOCK(inp);
605         return (0);
606 }
607
608 static int
609 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
610 {
611         struct sctp_inpcb *inp;
612         struct in6pcb *inp6;
613         int error;
614
615         inp = (struct sctp_inpcb *)so->so_pcb;
616         if (inp == NULL) {
617                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
618                 return (EINVAL);
619         }
620         if (addr) {
621                 switch (addr->sa_family) {
622 #ifdef INET
623                 case AF_INET:
624                         if (addr->sa_len != sizeof(struct sockaddr_in)) {
625                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
626                                 return (EINVAL);
627                         }
628                         break;
629 #endif
630 #ifdef INET6
631                 case AF_INET6:
632                         if (addr->sa_len != sizeof(struct sockaddr_in6)) {
633                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
634                                 return (EINVAL);
635                         }
636                         break;
637 #endif
638                 default:
639                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
640                         return (EINVAL);
641                 }
642         }
643         inp6 = (struct in6pcb *)inp;
644         inp6->inp_vflag &= ~INP_IPV4;
645         inp6->inp_vflag |= INP_IPV6;
646         if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) {
647                 switch (addr->sa_family) {
648 #ifdef INET
649                 case AF_INET:
650                         /* binding v4 addr to v6 socket, so reset flags */
651                         inp6->inp_vflag |= INP_IPV4;
652                         inp6->inp_vflag &= ~INP_IPV6;
653                         break;
654 #endif
655 #ifdef INET6
656                 case AF_INET6:
657                         {
658                                 struct sockaddr_in6 *sin6_p;
659
660                                 sin6_p = (struct sockaddr_in6 *)addr;
661
662                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
663                                         inp6->inp_vflag |= INP_IPV4;
664                                 }
665 #ifdef INET
666                                 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
667                                         struct sockaddr_in sin;
668
669                                         in6_sin6_2_sin(&sin, sin6_p);
670                                         inp6->inp_vflag |= INP_IPV4;
671                                         inp6->inp_vflag &= ~INP_IPV6;
672                                         error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
673                                         return (error);
674                                 }
675 #endif
676                                 break;
677                         }
678 #endif
679                 default:
680                         break;
681                 }
682         } else if (addr != NULL) {
683                 struct sockaddr_in6 *sin6_p;
684
685                 /* IPV6_V6ONLY socket */
686 #ifdef INET
687                 if (addr->sa_family == AF_INET) {
688                         /* can't bind v4 addr to v6 only socket! */
689                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
690                         return (EINVAL);
691                 }
692 #endif
693                 sin6_p = (struct sockaddr_in6 *)addr;
694
695                 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
696                         /* can't bind v4-mapped addrs either! */
697                         /* NOTE: we don't support SIIT */
698                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
699                         return (EINVAL);
700                 }
701         }
702         error = sctp_inpcb_bind(so, addr, NULL, p);
703         return (error);
704 }
705
706
707 static void
708 sctp6_close(struct socket *so)
709 {
710         sctp_close(so);
711 }
712
713 /* This could be made common with sctp_detach() since they are identical */
714
715 static
716 int
717 sctp6_disconnect(struct socket *so)
718 {
719         return (sctp_disconnect(so));
720 }
721
722
723 int
724 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
725     struct mbuf *control, struct thread *p);
726
727
728 static int
729 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
730     struct mbuf *control, struct thread *p)
731 {
732         struct sctp_inpcb *inp;
733         struct in6pcb *inp6;
734
735 #ifdef INET
736         struct sockaddr_in6 *sin6;
737
738 #endif                          /* INET */
739         /* No SPL needed since sctp_output does this */
740
741         inp = (struct sctp_inpcb *)so->so_pcb;
742         if (inp == NULL) {
743                 if (control) {
744                         SCTP_RELEASE_PKT(control);
745                         control = NULL;
746                 }
747                 SCTP_RELEASE_PKT(m);
748                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
749                 return (EINVAL);
750         }
751         inp6 = (struct in6pcb *)inp;
752         /*
753          * For the TCP model we may get a NULL addr, if we are a connected
754          * socket thats ok.
755          */
756         if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
757             (addr == NULL)) {
758                 goto connected_type;
759         }
760         if (addr == NULL) {
761                 SCTP_RELEASE_PKT(m);
762                 if (control) {
763                         SCTP_RELEASE_PKT(control);
764                         control = NULL;
765                 }
766                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
767                 return (EDESTADDRREQ);
768         }
769 #ifdef INET
770         sin6 = (struct sockaddr_in6 *)addr;
771         if (SCTP_IPV6_V6ONLY(inp6)) {
772                 /*
773                  * if IPV6_V6ONLY flag, we discard datagrams destined to a
774                  * v4 addr or v4-mapped addr
775                  */
776                 if (addr->sa_family == AF_INET) {
777                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
778                         return (EINVAL);
779                 }
780                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
781                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
782                         return (EINVAL);
783                 }
784         }
785         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
786                 struct sockaddr_in sin;
787
788                 /* convert v4-mapped into v4 addr and send */
789                 in6_sin6_2_sin(&sin, sin6);
790                 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
791         }
792 #endif                          /* INET */
793 connected_type:
794         /* now what about control */
795         if (control) {
796                 if (inp->control) {
797                         SCTP_PRINTF("huh? control set?\n");
798                         SCTP_RELEASE_PKT(inp->control);
799                         inp->control = NULL;
800                 }
801                 inp->control = control;
802         }
803         /* Place the data */
804         if (inp->pkt) {
805                 SCTP_BUF_NEXT(inp->pkt_last) = m;
806                 inp->pkt_last = m;
807         } else {
808                 inp->pkt_last = inp->pkt = m;
809         }
810         if (
811         /* FreeBSD and MacOSX uses a flag passed */
812             ((flags & PRUS_MORETOCOME) == 0)
813             ) {
814                 /*
815                  * note with the current version this code will only be used
816                  * by OpenBSD, NetBSD and FreeBSD have methods for
817                  * re-defining sosend() to use sctp_sosend().  One can
818                  * optionaly switch back to this code (by changing back the
819                  * defininitions but this is not advisable.
820                  */
821                 int ret;
822
823                 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
824                 inp->pkt = NULL;
825                 inp->control = NULL;
826                 return (ret);
827         } else {
828                 return (0);
829         }
830 }
831
832 static int
833 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
834 {
835         uint32_t vrf_id;
836         int error = 0;
837         struct sctp_inpcb *inp;
838         struct sctp_tcb *stcb;
839
840 #ifdef INET
841         struct in6pcb *inp6;
842         struct sockaddr_in6 *sin6;
843         union sctp_sockstore store;
844
845 #endif
846
847 #ifdef INET
848         inp6 = (struct in6pcb *)so->so_pcb;
849 #endif
850         inp = (struct sctp_inpcb *)so->so_pcb;
851         if (inp == NULL) {
852                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
853                 return (ECONNRESET);    /* I made the same as TCP since we are
854                                          * not setup? */
855         }
856         if (addr == NULL) {
857                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
858                 return (EINVAL);
859         }
860         switch (addr->sa_family) {
861 #ifdef INET
862         case AF_INET:
863                 if (addr->sa_len != sizeof(struct sockaddr_in)) {
864                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
865                         return (EINVAL);
866                 }
867                 break;
868 #endif
869 #ifdef INET6
870         case AF_INET6:
871                 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
872                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
873                         return (EINVAL);
874                 }
875                 break;
876 #endif
877         default:
878                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
879                 return (EINVAL);
880         }
881
882         vrf_id = inp->def_vrf_id;
883         SCTP_ASOC_CREATE_LOCK(inp);
884         SCTP_INP_RLOCK(inp);
885         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
886             SCTP_PCB_FLAGS_UNBOUND) {
887                 /* Bind a ephemeral port */
888                 SCTP_INP_RUNLOCK(inp);
889                 error = sctp6_bind(so, NULL, p);
890                 if (error) {
891                         SCTP_ASOC_CREATE_UNLOCK(inp);
892
893                         return (error);
894                 }
895                 SCTP_INP_RLOCK(inp);
896         }
897         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
898             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
899                 /* We are already connected AND the TCP model */
900                 SCTP_INP_RUNLOCK(inp);
901                 SCTP_ASOC_CREATE_UNLOCK(inp);
902                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
903                 return (EADDRINUSE);
904         }
905 #ifdef INET
906         sin6 = (struct sockaddr_in6 *)addr;
907         if (SCTP_IPV6_V6ONLY(inp6)) {
908                 /*
909                  * if IPV6_V6ONLY flag, ignore connections destined to a v4
910                  * addr or v4-mapped addr
911                  */
912                 if (addr->sa_family == AF_INET) {
913                         SCTP_INP_RUNLOCK(inp);
914                         SCTP_ASOC_CREATE_UNLOCK(inp);
915                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
916                         return (EINVAL);
917                 }
918                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
919                         SCTP_INP_RUNLOCK(inp);
920                         SCTP_ASOC_CREATE_UNLOCK(inp);
921                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
922                         return (EINVAL);
923                 }
924         }
925         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
926                 /* convert v4-mapped into v4 addr */
927                 in6_sin6_2_sin(&store.sin, sin6);
928                 addr = &store.sa;
929         }
930 #endif                          /* INET */
931         /* Now do we connect? */
932         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
933                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
934                 if (stcb) {
935                         SCTP_TCB_UNLOCK(stcb);
936                 }
937                 SCTP_INP_RUNLOCK(inp);
938         } else {
939                 SCTP_INP_RUNLOCK(inp);
940                 SCTP_INP_WLOCK(inp);
941                 SCTP_INP_INCR_REF(inp);
942                 SCTP_INP_WUNLOCK(inp);
943                 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
944                 if (stcb == NULL) {
945                         SCTP_INP_WLOCK(inp);
946                         SCTP_INP_DECR_REF(inp);
947                         SCTP_INP_WUNLOCK(inp);
948                 }
949         }
950
951         if (stcb != NULL) {
952                 /* Already have or am bring up an association */
953                 SCTP_ASOC_CREATE_UNLOCK(inp);
954                 SCTP_TCB_UNLOCK(stcb);
955                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
956                 return (EALREADY);
957         }
958         /* We are GOOD to go */
959         stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, p);
960         SCTP_ASOC_CREATE_UNLOCK(inp);
961         if (stcb == NULL) {
962                 /* Gak! no memory */
963                 return (error);
964         }
965         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
966                 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
967                 /* Set the connected flag so we can queue data */
968                 soisconnecting(so);
969         }
970         stcb->asoc.state = SCTP_STATE_COOKIE_WAIT;
971         (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
972
973         /* initialize authentication parameters for the assoc */
974         sctp_initialize_auth_params(inp, stcb);
975
976         sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
977         SCTP_TCB_UNLOCK(stcb);
978         return (error);
979 }
980
981 static int
982 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
983 {
984         struct sockaddr_in6 *sin6;
985         struct sctp_inpcb *inp;
986         uint32_t vrf_id;
987         struct sctp_ifa *sctp_ifa;
988
989         int error;
990
991         /*
992          * Do the malloc first in case it blocks.
993          */
994         SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
995         if (sin6 == NULL)
996                 return (ENOMEM);
997         sin6->sin6_family = AF_INET6;
998         sin6->sin6_len = sizeof(*sin6);
999
1000         inp = (struct sctp_inpcb *)so->so_pcb;
1001         if (inp == NULL) {
1002                 SCTP_FREE_SONAME(sin6);
1003                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1004                 return (ECONNRESET);
1005         }
1006         SCTP_INP_RLOCK(inp);
1007         sin6->sin6_port = inp->sctp_lport;
1008         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1009                 /* For the bound all case you get back 0 */
1010                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
1011                         struct sctp_tcb *stcb;
1012                         struct sockaddr_in6 *sin_a6;
1013                         struct sctp_nets *net;
1014                         int fnd;
1015
1016                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1017                         if (stcb == NULL) {
1018                                 goto notConn6;
1019                         }
1020                         fnd = 0;
1021                         sin_a6 = NULL;
1022                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1023                                 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1024                                 if (sin_a6 == NULL)
1025                                         /* this will make coverity happy */
1026                                         continue;
1027
1028                                 if (sin_a6->sin6_family == AF_INET6) {
1029                                         fnd = 1;
1030                                         break;
1031                                 }
1032                         }
1033                         if ((!fnd) || (sin_a6 == NULL)) {
1034                                 /* punt */
1035                                 goto notConn6;
1036                         }
1037                         vrf_id = inp->def_vrf_id;
1038                         sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id);
1039                         if (sctp_ifa) {
1040                                 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
1041                         }
1042                 } else {
1043                         /* For the bound all case you get back 0 */
1044         notConn6:
1045                         memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
1046                 }
1047         } else {
1048                 /* Take the first IPv6 address in the list */
1049                 struct sctp_laddr *laddr;
1050                 int fnd = 0;
1051
1052                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1053                         if (laddr->ifa->address.sa.sa_family == AF_INET6) {
1054                                 struct sockaddr_in6 *sin_a;
1055
1056                                 sin_a = &laddr->ifa->address.sin6;
1057                                 sin6->sin6_addr = sin_a->sin6_addr;
1058                                 fnd = 1;
1059                                 break;
1060                         }
1061                 }
1062                 if (!fnd) {
1063                         SCTP_FREE_SONAME(sin6);
1064                         SCTP_INP_RUNLOCK(inp);
1065                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1066                         return (ENOENT);
1067                 }
1068         }
1069         SCTP_INP_RUNLOCK(inp);
1070         /* Scoping things for v6 */
1071         if ((error = sa6_recoverscope(sin6)) != 0) {
1072                 SCTP_FREE_SONAME(sin6);
1073                 return (error);
1074         }
1075         (*addr) = (struct sockaddr *)sin6;
1076         return (0);
1077 }
1078
1079 static int
1080 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1081 {
1082         struct sockaddr_in6 *sin6;
1083         int fnd;
1084         struct sockaddr_in6 *sin_a6;
1085         struct sctp_inpcb *inp;
1086         struct sctp_tcb *stcb;
1087         struct sctp_nets *net;
1088         int error;
1089
1090         /* Do the malloc first in case it blocks. */
1091         SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1092         if (sin6 == NULL)
1093                 return (ENOMEM);
1094         sin6->sin6_family = AF_INET6;
1095         sin6->sin6_len = sizeof(*sin6);
1096
1097         inp = (struct sctp_inpcb *)so->so_pcb;
1098         if ((inp == NULL) ||
1099             ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
1100                 /* UDP type and listeners will drop out here */
1101                 SCTP_FREE_SONAME(sin6);
1102                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
1103                 return (ENOTCONN);
1104         }
1105         SCTP_INP_RLOCK(inp);
1106         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1107         if (stcb) {
1108                 SCTP_TCB_LOCK(stcb);
1109         }
1110         SCTP_INP_RUNLOCK(inp);
1111         if (stcb == NULL) {
1112                 SCTP_FREE_SONAME(sin6);
1113                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1114                 return (ECONNRESET);
1115         }
1116         fnd = 0;
1117         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1118                 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1119                 if (sin_a6->sin6_family == AF_INET6) {
1120                         fnd = 1;
1121                         sin6->sin6_port = stcb->rport;
1122                         sin6->sin6_addr = sin_a6->sin6_addr;
1123                         break;
1124                 }
1125         }
1126         SCTP_TCB_UNLOCK(stcb);
1127         if (!fnd) {
1128                 /* No IPv4 address */
1129                 SCTP_FREE_SONAME(sin6);
1130                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1131                 return (ENOENT);
1132         }
1133         if ((error = sa6_recoverscope(sin6)) != 0) {
1134                 SCTP_FREE_SONAME(sin6);
1135                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error);
1136                 return (error);
1137         }
1138         *addr = (struct sockaddr *)sin6;
1139         return (0);
1140 }
1141
1142 static int
1143 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1144 {
1145 #ifdef INET
1146         struct sockaddr *addr;
1147
1148 #endif
1149         struct in6pcb *inp6 = sotoin6pcb(so);
1150         int error;
1151
1152         if (inp6 == NULL) {
1153                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1154                 return (EINVAL);
1155         }
1156         /* allow v6 addresses precedence */
1157         error = sctp6_getaddr(so, nam);
1158 #ifdef INET
1159         if (error) {
1160                 /* try v4 next if v6 failed */
1161                 error = sctp_ingetaddr(so, nam);
1162                 if (error) {
1163                         return (error);
1164                 }
1165                 addr = *nam;
1166                 /* if I'm V6ONLY, convert it to v4-mapped */
1167                 if (SCTP_IPV6_V6ONLY(inp6)) {
1168                         struct sockaddr_in6 sin6;
1169
1170                         in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6);
1171                         memcpy(addr, &sin6, sizeof(struct sockaddr_in6));
1172                 }
1173         }
1174 #endif
1175         return (error);
1176 }
1177
1178
1179 static int
1180 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1181 {
1182 #ifdef INET
1183         struct sockaddr *addr;
1184
1185 #endif
1186         struct in6pcb *inp6 = sotoin6pcb(so);
1187         int error;
1188
1189         if (inp6 == NULL) {
1190                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1191                 return (EINVAL);
1192         }
1193         /* allow v6 addresses precedence */
1194         error = sctp6_peeraddr(so, nam);
1195 #ifdef INET
1196         if (error) {
1197                 /* try v4 next if v6 failed */
1198                 error = sctp_peeraddr(so, nam);
1199                 if (error) {
1200                         return (error);
1201                 }
1202                 addr = *nam;
1203                 /* if I'm V6ONLY, convert it to v4-mapped */
1204                 if (SCTP_IPV6_V6ONLY(inp6)) {
1205                         struct sockaddr_in6 sin6;
1206
1207                         in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6);
1208                         memcpy(addr, &sin6, sizeof(struct sockaddr_in6));
1209                 }
1210         }
1211 #endif
1212         return (error);
1213 }
1214
1215 struct pr_usrreqs sctp6_usrreqs = {
1216         .pru_abort = sctp6_abort,
1217         .pru_accept = sctp_accept,
1218         .pru_attach = sctp6_attach,
1219         .pru_bind = sctp6_bind,
1220         .pru_connect = sctp6_connect,
1221         .pru_control = in6_control,
1222         .pru_close = sctp6_close,
1223         .pru_detach = sctp6_close,
1224         .pru_sopoll = sopoll_generic,
1225         .pru_flush = sctp_flush,
1226         .pru_disconnect = sctp6_disconnect,
1227         .pru_listen = sctp_listen,
1228         .pru_peeraddr = sctp6_getpeeraddr,
1229         .pru_send = sctp6_send,
1230         .pru_shutdown = sctp_shutdown,
1231         .pru_sockaddr = sctp6_in6getaddr,
1232         .pru_sosend = sctp_sosend,
1233         .pru_soreceive = sctp_soreceive
1234 };
1235
1236 #endif