1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 /*-
33 * Copyright (c) 1982, 1986, 1988, 1993
34 * The Regents of the University of California.
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. Neither the name of the University nor the names of its contributors
46 * may be used to endorse or promote products derived from this software
47 * without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * SUCH DAMAGE.
60 *
61 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
62 */
63
64 #include <sys/cdefs.h>
65 __FBSDID("$FreeBSD$");
66
67 #include "opt_ipsec.h"
68 #include "opt_inet6.h"
69 #include "opt_route.h"
70
71 #include <sys/param.h>
72 #include <sys/errno.h>
73 #include <sys/jail.h>
74 #include <sys/kernel.h>
75 #include <sys/lock.h>
76 #include <sys/malloc.h>
77 #include <sys/mbuf.h>
78 #include <sys/priv.h>
79 #include <sys/proc.h>
80 #include <sys/protosw.h>
81 #include <sys/signalvar.h>
82 #include <sys/socket.h>
83 #include <sys/socketvar.h>
84 #include <sys/sx.h>
85 #include <sys/syslog.h>
86
87 #include <net/if.h>
88 #include <net/if_var.h>
89 #include <net/if_types.h>
90 #include <net/route.h>
91 #include <net/vnet.h>
92
93 #include <netinet/in.h>
94 #include <netinet/in_var.h>
95 #include <netinet/in_systm.h>
96 #include <netinet/in_pcb.h>
97
98 #include <netinet/icmp6.h>
99 #include <netinet/ip6.h>
100 #include <netinet/ip_var.h>
101 #include <netinet6/ip6protosw.h>
102 #include <netinet6/ip6_mroute.h>
103 #include <netinet6/in6_pcb.h>
104 #include <netinet6/ip6_var.h>
105 #include <netinet6/nd6.h>
106 #include <netinet6/raw_ip6.h>
107 #include <netinet6/in6_fib.h>
108 #include <netinet6/scope6_var.h>
109 #include <netinet6/send.h>
110
111 #include <netipsec/ipsec_support.h>
112
113 #include <machine/stdarg.h>
114
115 #define satosin6(sa) ((struct sockaddr_in6 *)(sa))
116 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
117
118 /*
119 * Raw interface to IP6 protocol.
120 */
121
122 VNET_DECLARE(struct inpcbhead, ripcb);
123 VNET_DECLARE(struct inpcbinfo, ripcbinfo);
124 #define V_ripcb VNET(ripcb)
125 #define V_ripcbinfo VNET(ripcbinfo)
126
127 extern u_long rip_sendspace;
128 extern u_long rip_recvspace;
129
130 VNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat);
131 VNET_PCPUSTAT_SYSINIT(rip6stat);
132
133 #ifdef VIMAGE
134 VNET_PCPUSTAT_SYSUNINIT(rip6stat);
135 #endif /* VIMAGE */
136
137 /*
138 * Hooks for multicast routing. They all default to NULL, so leave them not
139 * initialized and rely on BSS being set to 0.
140 */
141
142 /*
143 * The socket used to communicate with the multicast routing daemon.
144 */
145 VNET_DEFINE(struct socket *, ip6_mrouter);
146
147 /*
148 * The various mrouter functions.
149 */
150 int (*ip6_mrouter_set)(struct socket *, struct sockopt *);
151 int (*ip6_mrouter_get)(struct socket *, struct sockopt *);
152 int (*ip6_mrouter_done)(void);
153 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *);
154 int (*mrt6_ioctl)(u_long, caddr_t);
155
156 /*
157 * Setup generic address and protocol structures for raw_input routine, then
158 * pass them along with mbuf chain.
159 */
160 int
161 rip6_input(struct mbuf **mp, int *offp, int proto)
162 {
163 struct ifnet *ifp;
164 struct mbuf *m = *mp;
165 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
166 struct inpcb *inp;
167 struct inpcb *last = NULL;
168 struct mbuf *opts = NULL;
169 struct sockaddr_in6 fromsa;
170
171 NET_EPOCH_ASSERT();
172
173 RIP6STAT_INC(rip6s_ipackets);
174
175 init_sin6(&fromsa, m, 0); /* general init */
176
177 ifp = m->m_pkthdr.rcvif;
178
179 CK_LIST_FOREACH(inp, &V_ripcb, inp_list) {
180 /* XXX inp locking */
181 if ((inp->inp_vflag & INP_IPV6) == 0)
182 continue;
183 if (inp->inp_ip_p &&
184 inp->inp_ip_p != proto)
185 continue;
186 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) &&
187 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ip6->ip6_dst))
188 continue;
189 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
190 !IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ip6->ip6_src))
191 continue;
192 if (last != NULL) {
193 struct mbuf *n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
194
195 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
196 /*
197 * Check AH/ESP integrity.
198 */
199 if (IPSEC_ENABLED(ipv6)) {
200 if (n != NULL &&
201 IPSEC_CHECK_POLICY(ipv6, n, last) != 0) {
202 m_freem(n);
203 /* Do not inject data into pcb. */
204 n = NULL;
205 }
206 }
207 #endif /* IPSEC */
208 if (n) {
209 if (last->inp_flags & INP_CONTROLOPTS ||
210 last->inp_socket->so_options & SO_TIMESTAMP)
211 ip6_savecontrol(last, n, &opts);
212 /* strip intermediate headers */
213 m_adj(n, *offp);
214 if (sbappendaddr(&last->inp_socket->so_rcv,
215 (struct sockaddr *)&fromsa,
216 n, opts) == 0) {
217 m_freem(n);
218 if (opts)
219 m_freem(opts);
220 RIP6STAT_INC(rip6s_fullsock);
221 } else
222 sorwakeup(last->inp_socket);
223 opts = NULL;
224 }
225 INP_RUNLOCK(last);
226 last = NULL;
227 }
228 INP_RLOCK(inp);
229 if (__predict_false(inp->inp_flags2 & INP_FREED))
230 goto skip_2;
231 if (jailed_without_vnet(inp->inp_cred)) {
232 /*
233 * Allow raw socket in jail to receive multicast;
234 * assume process had PRIV_NETINET_RAW at attach,
235 * and fall through into normal filter path if so.
236 */
237 if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
238 prison_check_ip6(inp->inp_cred,
239 &ip6->ip6_dst) != 0)
240 goto skip_2;
241 }
242 if (inp->in6p_cksum != -1) {
243 RIP6STAT_INC(rip6s_isum);
244 if (m->m_pkthdr.len - (*offp + inp->in6p_cksum) < 2 ||
245 in6_cksum(m, proto, *offp,
246 m->m_pkthdr.len - *offp)) {
247 RIP6STAT_INC(rip6s_badsum);
248 /*
249 * Drop the received message, don't send an
250 * ICMP6 message. Set proto to IPPROTO_NONE
251 * to achieve that.
252 */
253 proto = IPPROTO_NONE;
254 goto skip_2;
255 }
256 }
257 /*
258 * If this raw socket has multicast state, and we
259 * have received a multicast, check if this socket
260 * should receive it, as multicast filtering is now
261 * the responsibility of the transport layer.
262 */
263 if (inp->in6p_moptions &&
264 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
265 /*
266 * If the incoming datagram is for MLD, allow it
267 * through unconditionally to the raw socket.
268 *
269 * Use the M_RTALERT_MLD flag to check for MLD
270 * traffic without having to inspect the mbuf chain
271 * more deeply, as all MLDv1/v2 host messages MUST
272 * contain the Router Alert option.
273 *
274 * In the case of MLDv1, we may not have explicitly
275 * joined the group, and may have set IFF_ALLMULTI
276 * on the interface. im6o_mc_filter() may discard
277 * control traffic we actually need to see.
278 *
279 * Userland multicast routing daemons should continue
280 * filter the control traffic appropriately.
281 */
282 int blocked;
283
284 blocked = MCAST_PASS;
285 if ((m->m_flags & M_RTALERT_MLD) == 0) {
286 struct sockaddr_in6 mcaddr;
287
288 bzero(&mcaddr, sizeof(struct sockaddr_in6));
289 mcaddr.sin6_len = sizeof(struct sockaddr_in6);
290 mcaddr.sin6_family = AF_INET6;
291 mcaddr.sin6_addr = ip6->ip6_dst;
292
293 blocked = im6o_mc_filter(inp->in6p_moptions,
294 ifp,
295 (struct sockaddr *)&mcaddr,
296 (struct sockaddr *)&fromsa);
297 }
298 if (blocked != MCAST_PASS) {
299 IP6STAT_INC(ip6s_notmember);
300 goto skip_2;
301 }
302 }
303 last = inp;
304 continue;
305 skip_2:
306 INP_RUNLOCK(inp);
307 }
308 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
309 /*
310 * Check AH/ESP integrity.
311 */
312 if (IPSEC_ENABLED(ipv6) && last != NULL &&
313 IPSEC_CHECK_POLICY(ipv6, m, last) != 0) {
314 m_freem(m);
315 IP6STAT_DEC(ip6s_delivered);
316 /* Do not inject data into pcb. */
317 INP_RUNLOCK(last);
318 } else
319 #endif /* IPSEC */
320 if (last != NULL) {
321 if (last->inp_flags & INP_CONTROLOPTS ||
322 last->inp_socket->so_options & SO_TIMESTAMP)
323 ip6_savecontrol(last, m, &opts);
324 /* Strip intermediate headers. */
325 m_adj(m, *offp);
326 if (sbappendaddr(&last->inp_socket->so_rcv,
327 (struct sockaddr *)&fromsa, m, opts) == 0) {
328 m_freem(m);
329 if (opts)
330 m_freem(opts);
331 RIP6STAT_INC(rip6s_fullsock);
332 } else
333 sorwakeup(last->inp_socket);
334 INP_RUNLOCK(last);
335 } else {
336 RIP6STAT_INC(rip6s_nosock);
337 if (m->m_flags & M_MCAST)
338 RIP6STAT_INC(rip6s_nosockmcast);
339 if (proto == IPPROTO_NONE)
340 m_freem(m);
341 else
342 icmp6_error(m, ICMP6_PARAM_PROB,
343 ICMP6_PARAMPROB_NEXTHEADER,
344 ip6_get_prevhdr(m, *offp));
345 IP6STAT_DEC(ip6s_delivered);
346 }
347 return (IPPROTO_DONE);
348 }
349
350 void
351 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d)
352 {
353 struct ip6ctlparam *ip6cp = NULL;
354 const struct sockaddr_in6 *sa6_src = NULL;
355 void *cmdarg;
356 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange;
357
358 if (sa->sa_family != AF_INET6 ||
359 sa->sa_len != sizeof(struct sockaddr_in6))
360 return;
361
362 if ((unsigned)cmd >= PRC_NCMDS)
363 return;
364 if (PRC_IS_REDIRECT(cmd))
365 notify = in6_rtchange, d = NULL;
366 else if (cmd == PRC_HOSTDEAD)
367 d = NULL;
368 else if (inet6ctlerrmap[cmd] == 0)
369 return;
370
371 /*
372 * If the parameter is from icmp6, decode it.
373 */
374 if (d != NULL) {
375 ip6cp = (struct ip6ctlparam *)d;
376 cmdarg = ip6cp->ip6c_cmdarg;
377 sa6_src = ip6cp->ip6c_src;
378 } else {
379 cmdarg = NULL;
380 sa6_src = &sa6_any;
381 }
382
383 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0,
384 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify);
385 }
386
387 /*
388 * Generate IPv6 header and pass packet to ip6_output. Tack on options user
389 * may have setup with control call.
390 */
391 int
392 rip6_output(struct mbuf *m, struct socket *so, ...)
393 {
394 struct epoch_tracker et;
395 struct mbuf *control;
396 struct m_tag *mtag;
397 struct sockaddr_in6 *dstsock;
398 struct ip6_hdr *ip6;
399 struct inpcb *inp;
400 u_int plen = m->m_pkthdr.len;
401 int error = 0;
402 struct ip6_pktopts opt, *optp;
403 struct ifnet *oifp = NULL;
404 int type = 0, code = 0; /* for ICMPv6 output statistics only */
405 int scope_ambiguous = 0;
406 int use_defzone = 0;
407 int hlim = 0;
408 struct in6_addr in6a;
409 va_list ap;
410
411 va_start(ap, so);
412 dstsock = va_arg(ap, struct sockaddr_in6 *);
413 control = va_arg(ap, struct mbuf *);
414 va_end(ap);
415
416 inp = sotoinpcb(so);
417 INP_WLOCK(inp);
418
419 if (control != NULL) {
420 if ((error = ip6_setpktopts(control, &opt,
421 inp->in6p_outputopts, so->so_cred,
422 so->so_proto->pr_protocol)) != 0) {
423 goto bad;
424 }
425 optp = &opt;
426 } else
427 optp = inp->in6p_outputopts;
428
429 /*
430 * Check and convert scope zone ID into internal form.
431 *
432 * XXX: we may still need to determine the zone later.
433 */
434 if (!(so->so_state & SS_ISCONNECTED)) {
435 if (!optp || !optp->ip6po_pktinfo ||
436 !optp->ip6po_pktinfo->ipi6_ifindex)
437 use_defzone = V_ip6_use_defzone;
438 if (dstsock->sin6_scope_id == 0 && !use_defzone)
439 scope_ambiguous = 1;
440 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0)
441 goto bad;
442 }
443
444 /*
445 * For an ICMPv6 packet, we should know its type and code to update
446 * statistics.
447 */
448 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
449 struct icmp6_hdr *icmp6;
450 if (m->m_len < sizeof(struct icmp6_hdr) &&
451 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
452 error = ENOBUFS;
453 goto bad;
454 }
455 icmp6 = mtod(m, struct icmp6_hdr *);
456 type = icmp6->icmp6_type;
457 code = icmp6->icmp6_code;
458 }
459
460 M_PREPEND(m, sizeof(*ip6), M_NOWAIT);
461 if (m == NULL) {
462 error = ENOBUFS;
463 goto bad;
464 }
465 ip6 = mtod(m, struct ip6_hdr *);
466
467 #ifdef ROUTE_MPATH
468 if (CALC_FLOWID_OUTBOUND) {
469 uint32_t hash_type, hash_val;
470
471 hash_val = fib6_calc_software_hash(&inp->in6p_laddr,
472 &dstsock->sin6_addr, 0, 0, so->so_proto->pr_protocol,
473 &hash_type);
474 inp->inp_flowid = hash_val;
475 inp->inp_flowtype = hash_type;
476 }
477 #endif
478 /*
479 * Source address selection.
480 */
481 error = in6_selectsrc_socket(dstsock, optp, inp, so->so_cred,
482 scope_ambiguous, &in6a, &hlim);
483
484 if (error)
485 goto bad;
486 error = prison_check_ip6(inp->inp_cred, &in6a);
487 if (error != 0)
488 goto bad;
489 ip6->ip6_src = in6a;
490
491 ip6->ip6_dst = dstsock->sin6_addr;
492
493 /*
494 * Fill in the rest of the IPv6 header fields.
495 */
496 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
497 (inp->inp_flow & IPV6_FLOWINFO_MASK);
498 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
499 (IPV6_VERSION & IPV6_VERSION_MASK);
500
501 /*
502 * ip6_plen will be filled in ip6_output, so not fill it here.
503 */
504 ip6->ip6_nxt = inp->inp_ip_p;
505 ip6->ip6_hlim = hlim;
506
507 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
508 inp->in6p_cksum != -1) {
509 struct mbuf *n;
510 int off;
511 u_int16_t *p;
512
513 /* Compute checksum. */
514 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
515 off = offsetof(struct icmp6_hdr, icmp6_cksum);
516 else
517 off = inp->in6p_cksum;
518 if (plen < off + 2) {
519 error = EINVAL;
520 goto bad;
521 }
522 off += sizeof(struct ip6_hdr);
523
524 n = m;
525 while (n && n->m_len <= off) {
526 off -= n->m_len;
527 n = n->m_next;
528 }
529 if (!n)
530 goto bad;
531 p = (u_int16_t *)(mtod(n, caddr_t) + off);
532 *p = 0;
533 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
534 }
535
536 /*
537 * Send RA/RS messages to user land for protection, before sending
538 * them to rtadvd/rtsol.
539 */
540 if ((send_sendso_input_hook != NULL) &&
541 so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
542 switch (type) {
543 case ND_ROUTER_ADVERT:
544 case ND_ROUTER_SOLICIT:
545 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING,
546 sizeof(unsigned short), M_NOWAIT);
547 if (mtag == NULL)
548 goto bad;
549 m_tag_prepend(m, mtag);
550 }
551 }
552
553 NET_EPOCH_ENTER(et);
554 error = ip6_output(m, optp, NULL, 0, inp->in6p_moptions, &oifp, inp);
555 NET_EPOCH_EXIT(et);
556 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
557 if (oifp)
558 icmp6_ifoutstat_inc(oifp, type, code);
559 ICMP6STAT_INC(icp6s_outhist[type]);
560 } else
561 RIP6STAT_INC(rip6s_opackets);
562
563 goto freectl;
564
565 bad:
566 if (m)
567 m_freem(m);
568
569 freectl:
570 if (control != NULL) {
571 ip6_clearpktopts(&opt, -1);
572 m_freem(control);
573 }
574 INP_WUNLOCK(inp);
575 return (error);
576 }
577
578 /*
579 * Raw IPv6 socket option processing.
580 */
581 int
582 rip6_ctloutput(struct socket *so, struct sockopt *sopt)
583 {
584 struct inpcb *inp;
585 int error;
586
587 if (sopt->sopt_level == IPPROTO_ICMPV6)
588 /*
589 * XXX: is it better to call icmp6_ctloutput() directly
590 * from protosw?
591 */
592 return (icmp6_ctloutput(so, sopt));
593 else if (sopt->sopt_level != IPPROTO_IPV6) {
594 if (sopt->sopt_level == SOL_SOCKET &&
595 sopt->sopt_name == SO_SETFIB) {
596 inp = sotoinpcb(so);
597 INP_WLOCK(inp);
598 inp->inp_inc.inc_fibnum = so->so_fibnum;
599 INP_WUNLOCK(inp);
600 return (0);
601 }
602 return (EINVAL);
603 }
604
605 error = 0;
606
607 switch (sopt->sopt_dir) {
608 case SOPT_GET:
609 switch (sopt->sopt_name) {
610 case MRT6_INIT:
611 case MRT6_DONE:
612 case MRT6_ADD_MIF:
613 case MRT6_DEL_MIF:
614 case MRT6_ADD_MFC:
615 case MRT6_DEL_MFC:
616 case MRT6_PIM:
617 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) :
618 EOPNOTSUPP;
619 break;
620 case IPV6_CHECKSUM:
621 error = ip6_raw_ctloutput(so, sopt);
622 break;
623 default:
624 error = ip6_ctloutput(so, sopt);
625 break;
626 }
627 break;
628
629 case SOPT_SET:
630 switch (sopt->sopt_name) {
631 case MRT6_INIT:
632 case MRT6_DONE:
633 case MRT6_ADD_MIF:
634 case MRT6_DEL_MIF:
635 case MRT6_ADD_MFC:
636 case MRT6_DEL_MFC:
637 case MRT6_PIM:
638 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) :
639 EOPNOTSUPP;
640 break;
641 case IPV6_CHECKSUM:
642 error = ip6_raw_ctloutput(so, sopt);
643 break;
644 default:
645 error = ip6_ctloutput(so, sopt);
646 break;
647 }
648 break;
649 }
650
651 return (error);
652 }
653
654 static int
655 rip6_attach(struct socket *so, int proto, struct thread *td)
656 {
657 struct inpcb *inp;
658 struct icmp6_filter *filter;
659 int error;
660
661 inp = sotoinpcb(so);
662 KASSERT(inp == NULL, ("rip6_attach: inp != NULL"));
663
664 error = priv_check(td, PRIV_NETINET_RAW);
665 if (error)
666 return (error);
667 error = soreserve(so, rip_sendspace, rip_recvspace);
668 if (error)
669 return (error);
670 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
671 if (filter == NULL)
672 return (ENOMEM);
673 INP_INFO_WLOCK(&V_ripcbinfo);
674 error = in_pcballoc(so, &V_ripcbinfo);
675 if (error) {
676 INP_INFO_WUNLOCK(&V_ripcbinfo);
677 free(filter, M_PCB);
678 return (error);
679 }
680 inp = (struct inpcb *)so->so_pcb;
681 INP_INFO_WUNLOCK(&V_ripcbinfo);
682 inp->inp_vflag |= INP_IPV6;
683 inp->inp_ip_p = (long)proto;
684 inp->in6p_hops = -1; /* use kernel default */
685 inp->in6p_cksum = -1;
686 inp->in6p_icmp6filt = filter;
687 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
688 INP_WUNLOCK(inp);
689 return (0);
690 }
691
692 static void
693 rip6_detach(struct socket *so)
694 {
695 struct inpcb *inp;
696
697 inp = sotoinpcb(so);
698 KASSERT(inp != NULL, ("rip6_detach: inp == NULL"));
699
700 if (so == V_ip6_mrouter && ip6_mrouter_done)
701 ip6_mrouter_done();
702 /* xxx: RSVP */
703 INP_INFO_WLOCK(&V_ripcbinfo);
704 INP_WLOCK(inp);
705 free(inp->in6p_icmp6filt, M_PCB);
706 in_pcbdetach(inp);
707 in_pcbfree(inp);
708 INP_INFO_WUNLOCK(&V_ripcbinfo);
709 }
710
711 /* XXXRW: This can't ever be called. */
712 static void
713 rip6_abort(struct socket *so)
714 {
715 struct inpcb *inp;
716
717 inp = sotoinpcb(so);
718 KASSERT(inp != NULL, ("rip6_abort: inp == NULL"));
719
720 soisdisconnected(so);
721 }
722
723 static void
724 rip6_close(struct socket *so)
725 {
726 struct inpcb *inp;
727
728 inp = sotoinpcb(so);
729 KASSERT(inp != NULL, ("rip6_close: inp == NULL"));
730
731 soisdisconnected(so);
732 }
733
734 static int
735 rip6_disconnect(struct socket *so)
736 {
737 struct inpcb *inp;
738
739 inp = sotoinpcb(so);
740 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL"));
741
742 if ((so->so_state & SS_ISCONNECTED) == 0)
743 return (ENOTCONN);
744 inp->in6p_faddr = in6addr_any;
745 rip6_abort(so);
746 return (0);
747 }
748
749 static int
750 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
751 {
752 struct epoch_tracker et;
753 struct inpcb *inp;
754 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
755 struct ifaddr *ifa = NULL;
756 int error = 0;
757
758 inp = sotoinpcb(so);
759 KASSERT(inp != NULL, ("rip6_bind: inp == NULL"));
760
761 if (nam->sa_len != sizeof(*addr))
762 return (EINVAL);
763 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0)
764 return (error);
765 if (CK_STAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6)
766 return (EADDRNOTAVAIL);
767 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0)
768 return (error);
769
770 NET_EPOCH_ENTER(et);
771 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
772 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) {
773 NET_EPOCH_EXIT(et);
774 return (EADDRNOTAVAIL);
775 }
776 if (ifa != NULL &&
777 ((struct in6_ifaddr *)ifa)->ia6_flags &
778 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
779 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
780 NET_EPOCH_EXIT(et);
781 return (EADDRNOTAVAIL);
782 }
783 NET_EPOCH_EXIT(et);
784 INP_INFO_WLOCK(&V_ripcbinfo);
785 INP_WLOCK(inp);
786 inp->in6p_laddr = addr->sin6_addr;
787 INP_WUNLOCK(inp);
788 INP_INFO_WUNLOCK(&V_ripcbinfo);
789 return (0);
790 }
791
792 static int
793 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
794 {
795 struct inpcb *inp;
796 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
797 struct in6_addr in6a;
798 int error = 0, scope_ambiguous = 0;
799
800 inp = sotoinpcb(so);
801 KASSERT(inp != NULL, ("rip6_connect: inp == NULL"));
802
803 if (nam->sa_len != sizeof(*addr))
804 return (EINVAL);
805 if (CK_STAILQ_EMPTY(&V_ifnet))
806 return (EADDRNOTAVAIL);
807 if (addr->sin6_family != AF_INET6)
808 return (EAFNOSUPPORT);
809
810 /*
811 * Application should provide a proper zone ID or the use of default
812 * zone IDs should be enabled. Unfortunately, some applications do
813 * not behave as it should, so we need a workaround. Even if an
814 * appropriate ID is not determined, we'll see if we can determine
815 * the outgoing interface. If we can, determine the zone ID based on
816 * the interface below.
817 */
818 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone)
819 scope_ambiguous = 1;
820 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0)
821 return (error);
822
823 INP_INFO_WLOCK(&V_ripcbinfo);
824 INP_WLOCK(inp);
825 /* Source address selection. XXX: need pcblookup? */
826 error = in6_selectsrc_socket(addr, inp->in6p_outputopts,
827 inp, so->so_cred, scope_ambiguous, &in6a, NULL);
828 if (error) {
829 INP_WUNLOCK(inp);
830 INP_INFO_WUNLOCK(&V_ripcbinfo);
831 return (error);
832 }
833
834 inp->in6p_faddr = addr->sin6_addr;
835 inp->in6p_laddr = in6a;
836 soisconnected(so);
837 INP_WUNLOCK(inp);
838 INP_INFO_WUNLOCK(&V_ripcbinfo);
839 return (0);
840 }
841
842 static int
843 rip6_shutdown(struct socket *so)
844 {
845 struct inpcb *inp;
846
847 inp = sotoinpcb(so);
848 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL"));
849
850 INP_WLOCK(inp);
851 socantsendmore(so);
852 INP_WUNLOCK(inp);
853 return (0);
854 }
855
856 static int
857 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
858 struct mbuf *control, struct thread *td)
859 {
860 struct inpcb *inp;
861 struct sockaddr_in6 tmp;
862 struct sockaddr_in6 *dst;
863 int ret;
864
865 inp = sotoinpcb(so);
866 KASSERT(inp != NULL, ("rip6_send: inp == NULL"));
867
868 /* Always copy sockaddr to avoid overwrites. */
869 /* Unlocked read. */
870 if (so->so_state & SS_ISCONNECTED) {
871 if (nam) {
872 m_freem(m);
873 return (EISCONN);
874 }
875 /* XXX */
876 bzero(&tmp, sizeof(tmp));
877 tmp.sin6_family = AF_INET6;
878 tmp.sin6_len = sizeof(struct sockaddr_in6);
879 INP_RLOCK(inp);
880 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
881 sizeof(struct in6_addr));
882 INP_RUNLOCK(inp);
883 dst = &tmp;
884 } else {
885 if (nam == NULL) {
886 m_freem(m);
887 return (ENOTCONN);
888 }
889 if (nam->sa_len != sizeof(struct sockaddr_in6)) {
890 m_freem(m);
891 return (EINVAL);
892 }
893 tmp = *(struct sockaddr_in6 *)nam;
894 dst = &tmp;
895
896 if (dst->sin6_family == AF_UNSPEC) {
897 /*
898 * XXX: we allow this case for backward
899 * compatibility to buggy applications that
900 * rely on old (and wrong) kernel behavior.
901 */
902 log(LOG_INFO, "rip6 SEND: address family is "
903 "unspec. Assume AF_INET6\n");
904 dst->sin6_family = AF_INET6;
905 } else if (dst->sin6_family != AF_INET6) {
906 m_freem(m);
907 return(EAFNOSUPPORT);
908 }
909 }
910 ret = rip6_output(m, so, dst, control);
911 return (ret);
912 }
913
914 struct pr_usrreqs rip6_usrreqs = {
915 .pru_abort = rip6_abort,
916 .pru_attach = rip6_attach,
917 .pru_bind = rip6_bind,
918 .pru_connect = rip6_connect,
919 .pru_control = in6_control,
920 .pru_detach = rip6_detach,
921 .pru_disconnect = rip6_disconnect,
922 .pru_peeraddr = in6_getpeeraddr,
923 .pru_send = rip6_send,
924 .pru_shutdown = rip6_shutdown,
925 .pru_sockaddr = in6_getsockaddr,
926 .pru_close = rip6_close,
927 };
Cache object: cf7ca8385efc6afb04d639730ced1535
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