1/* $NetBSD: raw_ip6.c,v 1.153 2016/11/18 06:50:04 knakahara Exp $ */
2/* $KAME: raw_ip6.c,v 1.82 2001/07/23 18:57:56 jinmei Exp $ */
3
4/*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * 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
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33/*
34 * Copyright (c) 1982, 1986, 1988, 1993
35 * The Regents of the University of California. 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__KERNEL_RCSID(0, "$NetBSD: raw_ip6.c,v 1.153 2016/11/18 06:50:04 knakahara Exp $");
66
67#ifdef _KERNEL_OPT
68#include "opt_ipsec.h"
69#include "opt_net_mpsafe.h"
70#endif
71
72#include <sys/param.h>
73#include <sys/sysctl.h>
74#include <sys/mbuf.h>
75#include <sys/socket.h>
76#include <sys/protosw.h>
77#include <sys/socketvar.h>
78#include <sys/systm.h>
79#include <sys/proc.h>
80#include <sys/kauth.h>
81#include <sys/kmem.h>
82
83#include <net/if.h>
84#include <net/if_types.h>
85#include <net/net_stats.h>
86
87#include <netinet/in.h>
88#include <netinet/in_var.h>
89#include <netinet/ip6.h>
90#include <netinet6/ip6_var.h>
91#include <netinet6/ip6_private.h>
92#include <netinet6/ip6_mroute.h>
93#include <netinet/icmp6.h>
94#include <netinet6/icmp6_private.h>
95#include <netinet6/in6_pcb.h>
96#include <netinet6/nd6.h>
97#include <netinet6/ip6protosw.h>
98#include <netinet6/scope6_var.h>
99#include <netinet6/raw_ip6.h>
100
101#ifdef IPSEC
102#include <netipsec/ipsec.h>
103#include <netipsec/ipsec_var.h>
104#include <netipsec/ipsec_private.h>
105#include <netipsec/ipsec6.h>
106#endif
107
108#include "faith.h"
109#if defined(NFAITH) && 0 < NFAITH
110#include <net/if_faith.h>
111#endif
112
113extern struct inpcbtable rawcbtable;
114struct inpcbtable raw6cbtable;
115#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
116
117/*
118 * Raw interface to IP6 protocol.
119 */
120
121static percpu_t *rip6stat_percpu;
122
123#define RIP6_STATINC(x) _NET_STATINC(rip6stat_percpu, x)
124
125static void sysctl_net_inet6_raw6_setup(struct sysctllog **);
126
127/*
128 * Initialize raw connection block queue.
129 */
130void
131rip6_init(void)
132{
133
134 sysctl_net_inet6_raw6_setup(NULL);
135 in6_pcbinit(&raw6cbtable, 1, 1);
136
137 rip6stat_percpu = percpu_alloc(sizeof(uint64_t) * RIP6_NSTATS);
138}
139
140/*
141 * Setup generic address and protocol structures
142 * for raw_input routine, then pass them along with
143 * mbuf chain.
144 */
145int
146rip6_input(struct mbuf **mp, int *offp, int proto)
147{
148 struct mbuf *m = *mp;
149 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
150 struct inpcb_hdr *inph;
151 struct in6pcb *in6p;
152 struct in6pcb *last = NULL;
153 struct sockaddr_in6 rip6src;
154 struct mbuf *opts = NULL;
155
156 RIP6_STATINC(RIP6_STAT_IPACKETS);
157
158#if defined(NFAITH) && 0 < NFAITH
159 if (faithprefix(&ip6->ip6_dst)) {
160 /* send icmp6 host unreach? */
161 m_freem(m);
162 return IPPROTO_DONE;
163 }
164#endif
165
166 /* Be proactive about malicious use of IPv4 mapped address */
167 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
168 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
169 /* XXX stat */
170 m_freem(m);
171 return IPPROTO_DONE;
172 }
173
174 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0);
175 if (sa6_recoverscope(&rip6src) != 0) {
176 /* XXX: should be impossible. */
177 m_freem(m);
178 return IPPROTO_DONE;
179 }
180
181 TAILQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) {
182 in6p = (struct in6pcb *)inph;
183 if (in6p->in6p_af != AF_INET6)
184 continue;
185 if (in6p->in6p_ip6.ip6_nxt &&
186 in6p->in6p_ip6.ip6_nxt != proto)
187 continue;
188 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
189 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
190 continue;
191 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
192 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
193 continue;
194 if (in6p->in6p_cksum != -1) {
195 RIP6_STATINC(RIP6_STAT_ISUM);
196 if (in6_cksum(m, proto, *offp,
197 m->m_pkthdr.len - *offp)) {
198 RIP6_STATINC(RIP6_STAT_BADSUM);
199 continue;
200 }
201 }
202 if (last) {
203 struct mbuf *n;
204
205#ifdef IPSEC
206 /*
207 * Check AH/ESP integrity
208 */
209 if (ipsec_used && !ipsec6_in_reject(m, last))
210#endif /* IPSEC */
211 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
212 if (last->in6p_flags & IN6P_CONTROLOPTS)
213 ip6_savecontrol(last, &opts, ip6, n);
214 /* strip intermediate headers */
215 m_adj(n, *offp);
216 if (sbappendaddr(&last->in6p_socket->so_rcv,
217 sin6tosa(&rip6src), n, opts) == 0) {
218 /* should notify about lost packet */
219 m_freem(n);
220 if (opts)
221 m_freem(opts);
222 RIP6_STATINC(RIP6_STAT_FULLSOCK);
223 } else
224 sorwakeup(last->in6p_socket);
225 opts = NULL;
226 }
227 }
228 last = in6p;
229 }
230#ifdef IPSEC
231 if (ipsec_used && last && ipsec6_in_reject(m, last)) {
232 m_freem(m);
233 /*
234 * XXX ipsec6_in_reject update stat if there is an error
235 * so we just need to update stats by hand in the case of last is
236 * NULL
237 */
238 if (!last)
239 IPSEC6_STATINC(IPSEC_STAT_IN_POLVIO);
240 IP6_STATDEC(IP6_STAT_DELIVERED);
241 /* do not inject data into pcb */
242 } else
243#endif /* IPSEC */
244 if (last) {
245 if (last->in6p_flags & IN6P_CONTROLOPTS)
246 ip6_savecontrol(last, &opts, ip6, m);
247 /* strip intermediate headers */
248 m_adj(m, *offp);
249 if (sbappendaddr(&last->in6p_socket->so_rcv,
250 sin6tosa(&rip6src), m, opts) == 0) {
251 m_freem(m);
252 if (opts)
253 m_freem(opts);
254 RIP6_STATINC(RIP6_STAT_FULLSOCK);
255 } else
256 sorwakeup(last->in6p_socket);
257 } else {
258 RIP6_STATINC(RIP6_STAT_NOSOCK);
259 if (m->m_flags & M_MCAST)
260 RIP6_STATINC(RIP6_STAT_NOSOCKMCAST);
261 if (proto == IPPROTO_NONE)
262 m_freem(m);
263 else {
264 int s;
265 struct ifnet *rcvif = m_get_rcvif(m, &s);
266 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
267 in6_ifstat_inc(rcvif, ifs6_in_protounknown);
268 m_put_rcvif(rcvif, &s);
269 icmp6_error(m, ICMP6_PARAM_PROB,
270 ICMP6_PARAMPROB_NEXTHEADER,
271 prvnxtp - mtod(m, u_int8_t *));
272 }
273 IP6_STATDEC(IP6_STAT_DELIVERED);
274 }
275 return IPPROTO_DONE;
276}
277
278void *
279rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d)
280{
281 struct ip6_hdr *ip6;
282 struct ip6ctlparam *ip6cp = NULL;
283 const struct sockaddr_in6 *sa6_src = NULL;
284 void *cmdarg;
285 void (*notify)(struct in6pcb *, int) = in6_rtchange;
286 int nxt;
287
288 if (sa->sa_family != AF_INET6 ||
289 sa->sa_len != sizeof(struct sockaddr_in6))
290 return NULL;
291
292 if ((unsigned)cmd >= PRC_NCMDS)
293 return NULL;
294 if (PRC_IS_REDIRECT(cmd))
295 notify = in6_rtchange, d = NULL;
296 else if (cmd == PRC_HOSTDEAD)
297 d = NULL;
298 else if (cmd == PRC_MSGSIZE)
299 ; /* special code is present, see below */
300 else if (inet6ctlerrmap[cmd] == 0)
301 return NULL;
302
303 /* if the parameter is from icmp6, decode it. */
304 if (d != NULL) {
305 ip6cp = (struct ip6ctlparam *)d;
306 ip6 = ip6cp->ip6c_ip6;
307 cmdarg = ip6cp->ip6c_cmdarg;
308 sa6_src = ip6cp->ip6c_src;
309 nxt = ip6cp->ip6c_nxt;
310 } else {
311 ip6 = NULL;
312 cmdarg = NULL;
313 sa6_src = &sa6_any;
314 nxt = -1;
315 }
316
317 if (ip6 && cmd == PRC_MSGSIZE) {
318 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa;
319 int valid = 0;
320 struct in6pcb *in6p;
321
322 /*
323 * Check to see if we have a valid raw IPv6 socket
324 * corresponding to the address in the ICMPv6 message
325 * payload, and the protocol (ip6_nxt) meets the socket.
326 * XXX chase extension headers, or pass final nxt value
327 * from icmp6_notify_error()
328 */
329 in6p = NULL;
330 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0,
331 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0, 0);
332#if 0
333 if (!in6p) {
334 /*
335 * As the use of sendto(2) is fairly popular,
336 * we may want to allow non-connected pcb too.
337 * But it could be too weak against attacks...
338 * We should at least check if the local
339 * address (= s) is really ours.
340 */
341 in6p = in6_pcblookup_bind(&raw6cbtable,
342 &sa6->sin6_addr, 0, 0);
343 }
344#endif
345
346 if (in6p && in6p->in6p_ip6.ip6_nxt &&
347 in6p->in6p_ip6.ip6_nxt == nxt)
348 valid++;
349
350 /*
351 * Depending on the value of "valid" and routing table
352 * size (mtudisc_{hi,lo}wat), we will:
353 * - recalculate the new MTU and create the
354 * corresponding routing entry, or
355 * - ignore the MTU change notification.
356 */
357 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid);
358
359 /*
360 * regardless of if we called icmp6_mtudisc_update(),
361 * we need to call in6_pcbnotify(), to notify path MTU
362 * change to the userland (RFC3542), because some
363 * unconnected sockets may share the same destination
364 * and want to know the path MTU.
365 */
366 }
367
368 (void) in6_pcbnotify(&raw6cbtable, sa, 0,
369 sin6tocsa(sa6_src), 0, cmd, cmdarg, notify);
370 return NULL;
371}
372
373/*
374 * Generate IPv6 header and pass packet to ip6_output.
375 * Tack on options user may have setup with control call.
376 */
377int
378rip6_output(struct mbuf *m, struct socket * const so,
379 struct sockaddr_in6 * const dstsock, struct mbuf * const control)
380{
381 struct in6_addr *dst;
382 struct ip6_hdr *ip6;
383 struct in6pcb *in6p;
384 u_int plen = m->m_pkthdr.len;
385 int error = 0;
386 struct ip6_pktopts opt, *optp = NULL;
387 struct ifnet *oifp = NULL;
388 int type, code; /* for ICMPv6 output statistics only */
389 int scope_ambiguous = 0;
390 int bound = curlwp_bind();
391 struct psref psref;
392
393 in6p = sotoin6pcb(so);
394
395 dst = &dstsock->sin6_addr;
396 if (control) {
397 if ((error = ip6_setpktopts(control, &opt,
398 in6p->in6p_outputopts,
399 kauth_cred_get(), so->so_proto->pr_protocol)) != 0) {
400 goto bad;
401 }
402 optp = &opt;
403 } else
404 optp = in6p->in6p_outputopts;
405
406 /*
407 * Check and convert scope zone ID into internal form.
408 * XXX: we may still need to determine the zone later.
409 */
410 if (!(so->so_state & SS_ISCONNECTED)) {
411 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone)
412 scope_ambiguous = 1;
413 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0)
414 goto bad;
415 }
416
417 /*
418 * For an ICMPv6 packet, we should know its type and code
419 * to update statistics.
420 */
421 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
422 struct icmp6_hdr *icmp6;
423 if (m->m_len < sizeof(struct icmp6_hdr) &&
424 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
425 error = ENOBUFS;
426 goto bad;
427 }
428 icmp6 = mtod(m, struct icmp6_hdr *);
429 type = icmp6->icmp6_type;
430 code = icmp6->icmp6_code;
431 } else {
432 type = 0;
433 code = 0;
434 }
435
436 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT);
437 if (!m) {
438 error = ENOBUFS;
439 goto bad;
440 }
441 ip6 = mtod(m, struct ip6_hdr *);
442
443 /*
444 * Next header might not be ICMP6 but use its pseudo header anyway.
445 */
446 ip6->ip6_dst = *dst;
447
448 /*
449 * Source address selection.
450 */
451 error = in6_selectsrc(dstsock, optp, in6p->in6p_moptions,
452 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, &psref, &ip6->ip6_src);
453 if (error != 0)
454 goto bad;
455
456 if (oifp && scope_ambiguous) {
457 /*
458 * Application should provide a proper zone ID or the use of
459 * default zone IDs should be enabled. Unfortunately, some
460 * applications do not behave as it should, so we need a
461 * workaround. Even if an appropriate ID is not determined
462 * (when it's required), if we can determine the outgoing
463 * interface. determine the zone ID based on the interface.
464 */
465 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL);
466 if (error != 0)
467 goto bad;
468 }
469 ip6->ip6_dst = dstsock->sin6_addr;
470
471 /* fill in the rest of the IPv6 header fields */
472 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK;
473 ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
474 ip6->ip6_vfc |= IPV6_VERSION;
475 /* ip6_plen will be filled in ip6_output, so not fill it here. */
476 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt;
477 ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
478
479 if_put(oifp, &psref);
480 oifp = NULL;
481
482 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
483 in6p->in6p_cksum != -1) {
484 int off;
485 u_int16_t sum;
486
487 /* compute checksum */
488 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
489 off = offsetof(struct icmp6_hdr, icmp6_cksum);
490 else
491 off = in6p->in6p_cksum;
492 if (plen < off + 1) {
493 error = EINVAL;
494 goto bad;
495 }
496 off += sizeof(struct ip6_hdr);
497
498 sum = 0;
499 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum,
500 M_DONTWAIT);
501 if (m == NULL) {
502 error = ENOBUFS;
503 goto bad;
504 }
505 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
506 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum,
507 M_DONTWAIT);
508 if (m == NULL) {
509 error = ENOBUFS;
510 goto bad;
511 }
512 }
513
514 {
515 struct ifnet *ret_oifp = NULL;
516
517 error = ip6_output(m, optp, &in6p->in6p_route, 0,
518 in6p->in6p_moptions, so, &ret_oifp);
519 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
520 if (ret_oifp)
521 icmp6_ifoutstat_inc(ret_oifp, type, code);
522 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type);
523 } else
524 RIP6_STATINC(RIP6_STAT_OPACKETS);
525 }
526
527 goto freectl;
528
529 bad:
530 if (m)
531 m_freem(m);
532
533 freectl:
534 if (control) {
535 ip6_clearpktopts(&opt, -1);
536 m_freem(control);
537 }
538 if_put(oifp, &psref);
539 curlwp_bindx(bound);
540 return error;
541}
542
543/*
544 * Raw IPv6 socket option processing.
545 */
546int
547rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt)
548{
549 int error = 0;
550
551 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) {
552 int optval;
553
554 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */
555 if (op == PRCO_GETOPT) {
556 optval = 1;
557 error = sockopt_set(sopt, &optval, sizeof(optval));
558 } else if (op == PRCO_SETOPT) {
559 error = sockopt_getint(sopt, &optval);
560 if (error)
561 goto out;
562 if (optval == 0)
563 error = EINVAL;
564 }
565
566 goto out;
567 } else if (sopt->sopt_level != IPPROTO_IPV6)
568 return ip6_ctloutput(op, so, sopt);
569
570 switch (sopt->sopt_name) {
571 case MRT6_INIT:
572 case MRT6_DONE:
573 case MRT6_ADD_MIF:
574 case MRT6_DEL_MIF:
575 case MRT6_ADD_MFC:
576 case MRT6_DEL_MFC:
577 case MRT6_PIM:
578 if (op == PRCO_SETOPT)
579 error = ip6_mrouter_set(so, sopt);
580 else if (op == PRCO_GETOPT)
581 error = ip6_mrouter_get(so, sopt);
582 else
583 error = EINVAL;
584 break;
585 case IPV6_CHECKSUM:
586 return ip6_raw_ctloutput(op, so, sopt);
587 default:
588 return ip6_ctloutput(op, so, sopt);
589 }
590 out:
591 return error;
592}
593
594extern u_long rip6_sendspace;
595extern u_long rip6_recvspace;
596
597int
598rip6_attach(struct socket *so, int proto)
599{
600 struct in6pcb *in6p;
601 int s, error;
602
603 KASSERT(sotoin6pcb(so) == NULL);
604 sosetlock(so);
605
606 error = kauth_authorize_network(curlwp->l_cred,
607 KAUTH_NETWORK_SOCKET, KAUTH_REQ_NETWORK_SOCKET_RAWSOCK,
608 KAUTH_ARG(AF_INET6),
609 KAUTH_ARG(SOCK_RAW),
610 KAUTH_ARG(so->so_proto->pr_protocol));
611 if (error) {
612 return error;
613 }
614 s = splsoftnet();
615 error = soreserve(so, rip6_sendspace, rip6_recvspace);
616 if (error) {
617 splx(s);
618 return error;
619 }
620 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) {
621 splx(s);
622 return error;
623 }
624 splx(s);
625 in6p = sotoin6pcb(so);
626 in6p->in6p_ip6.ip6_nxt = proto;
627 in6p->in6p_cksum = -1;
628
629 in6p->in6p_icmp6filt = kmem_alloc(sizeof(struct icmp6_filter), KM_SLEEP);
630 if (in6p->in6p_icmp6filt == NULL) {
631 in6_pcbdetach(in6p);
632 return ENOMEM;
633 }
634 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt);
635 KASSERT(solocked(so));
636 return error;
637}
638
639static void
640rip6_detach(struct socket *so)
641{
642 struct in6pcb *in6p = sotoin6pcb(so);
643
644 KASSERT(solocked(so));
645 KASSERT(in6p != NULL);
646
647 if (so == ip6_mrouter) {
648 ip6_mrouter_done();
649 }
650 /* xxx: RSVP */
651 if (in6p->in6p_icmp6filt != NULL) {
652 kmem_free(in6p->in6p_icmp6filt, sizeof(struct icmp6_filter));
653 in6p->in6p_icmp6filt = NULL;
654 }
655 in6_pcbdetach(in6p);
656}
657
658static int
659rip6_accept(struct socket *so, struct sockaddr *nam)
660{
661 KASSERT(solocked(so));
662
663 return EOPNOTSUPP;
664}
665
666static int
667rip6_bind(struct socket *so, struct sockaddr *nam, struct lwp *l)
668{
669 struct in6pcb *in6p = sotoin6pcb(so);
670 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
671 struct ifaddr *ifa = NULL;
672 int error = 0;
673 int s;
674
675 KASSERT(solocked(so));
676 KASSERT(in6p != NULL);
677 KASSERT(nam != NULL);
678
679 if (addr->sin6_len != sizeof(*addr))
680 return EINVAL;
681 if (IFNET_READER_EMPTY() || addr->sin6_family != AF_INET6)
682 return EADDRNOTAVAIL;
683
684 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0)
685 return error;
686
687 /*
688 * we don't support mapped address here, it would confuse
689 * users so reject it
690 */
691 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr))
692 return EADDRNOTAVAIL;
693 s = pserialize_read_enter();
694 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
695 (ifa = ifa_ifwithaddr(sin6tosa(addr))) == NULL) {
696 error = EADDRNOTAVAIL;
697 goto out;
698 }
699 if (ifa && (ifatoia6(ifa))->ia6_flags &
700 (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED)) {
701 error = EADDRNOTAVAIL;
702 goto out;
703 }
704
705 in6p->in6p_laddr = addr->sin6_addr;
706 error = 0;
707out:
708 pserialize_read_exit(s);
709 return error;
710}
711
712static int
713rip6_listen(struct socket *so, struct lwp *l)
714{
715 KASSERT(solocked(so));
716
717 return EOPNOTSUPP;
718}
719
720static int
721rip6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
722{
723 struct in6pcb *in6p = sotoin6pcb(so);
724 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
725 struct in6_addr in6a;
726 struct ifnet *ifp = NULL;
727 int scope_ambiguous = 0;
728 int error = 0;
729 struct psref psref;
730 int bound;
731
732 KASSERT(solocked(so));
733 KASSERT(in6p != NULL);
734 KASSERT(nam != NULL);
735
736 if (IFNET_READER_EMPTY())
737 return EADDRNOTAVAIL;
738 if (addr->sin6_family != AF_INET6)
739 return EAFNOSUPPORT;
740
741 /*
742 * Application should provide a proper zone ID or the use of
743 * default zone IDs should be enabled. Unfortunately, some
744 * applications do not behave as it should, so we need a
745 * workaround. Even if an appropriate ID is not determined,
746 * we'll see if we can determine the outgoing interface. If we
747 * can, determine the zone ID based on the interface below.
748 */
749 if (addr->sin6_scope_id == 0 && !ip6_use_defzone)
750 scope_ambiguous = 1;
751 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0)
752 return error;
753
754 bound = curlwp_bind();
755 /* Source address selection. XXX: need pcblookup? */
756 error = in6_selectsrc(addr, in6p->in6p_outputopts,
757 in6p->in6p_moptions, &in6p->in6p_route,
758 &in6p->in6p_laddr, &ifp, &psref, &in6a);
759 if (error != 0)
760 goto out;
761 /* XXX: see above */
762 if (ifp && scope_ambiguous &&
763 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) {
764 goto out;
765 }
766 in6p->in6p_laddr = in6a;
767 in6p->in6p_faddr = addr->sin6_addr;
768 soisconnected(so);
769out:
770 if_put(ifp, &psref);
771 curlwp_bindx(bound);
772 return error;
773}
774
775static int
776rip6_connect2(struct socket *so, struct socket *so2)
777{
778 KASSERT(solocked(so));
779
780 return EOPNOTSUPP;
781}
782
783static int
784rip6_disconnect(struct socket *so)
785{
786 struct in6pcb *in6p = sotoin6pcb(so);
787
788 KASSERT(solocked(so));
789 KASSERT(in6p != NULL);
790
791 if ((so->so_state & SS_ISCONNECTED) == 0)
792 return ENOTCONN;
793
794 in6p->in6p_faddr = in6addr_any;
795 so->so_state &= ~SS_ISCONNECTED; /* XXX */
796 return 0;
797}
798
799static int
800rip6_shutdown(struct socket *so)
801{
802 KASSERT(solocked(so));
803
804 /*
805 * Mark the connection as being incapable of futther input.
806 */
807 socantsendmore(so);
808 return 0;
809}
810
811static int
812rip6_abort(struct socket *so)
813{
814 KASSERT(solocked(so));
815
816 soisdisconnected(so);
817 rip6_detach(so);
818 return 0;
819}
820
821static int
822rip6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
823{
824 return in6_control(so, cmd, nam, ifp);
825}
826
827static int
828rip6_stat(struct socket *so, struct stat *ub)
829{
830 KASSERT(solocked(so));
831
832 /* stat: don't bother with a blocksize */
833 return 0;
834}
835
836static int
837rip6_peeraddr(struct socket *so, struct sockaddr *nam)
838{
839 KASSERT(solocked(so));
840 KASSERT(sotoin6pcb(so) != NULL);
841 KASSERT(nam != NULL);
842
843 in6_setpeeraddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam);
844 return 0;
845}
846
847static int
848rip6_sockaddr(struct socket *so, struct sockaddr *nam)
849{
850 KASSERT(solocked(so));
851 KASSERT(sotoin6pcb(so) != NULL);
852 KASSERT(nam != NULL);
853
854 in6_setsockaddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam);
855 return 0;
856}
857
858static int
859rip6_rcvd(struct socket *so, int flags, struct lwp *l)
860{
861 KASSERT(solocked(so));
862
863 return EOPNOTSUPP;
864}
865
866static int
867rip6_recvoob(struct socket *so, struct mbuf *m, int flags)
868{
869 KASSERT(solocked(so));
870
871 return EOPNOTSUPP;
872}
873
874static int
875rip6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
876 struct mbuf *control, struct lwp *l)
877{
878 struct in6pcb *in6p = sotoin6pcb(so);
879 struct sockaddr_in6 tmp;
880 struct sockaddr_in6 *dst;
881 int error = 0;
882
883 KASSERT(solocked(so));
884 KASSERT(in6p != NULL);
885 KASSERT(m != NULL);
886
887 /*
888 * Ship a packet out. The appropriate raw output
889 * routine handles any messaging necessary.
890 */
891
892 /* always copy sockaddr to avoid overwrites */
893 if (so->so_state & SS_ISCONNECTED) {
894 if (nam) {
895 error = EISCONN;
896 goto release;
897 }
898 /* XXX */
899 sockaddr_in6_init(&tmp, &in6p->in6p_faddr, 0, 0, 0);
900 dst = &tmp;
901 } else {
902 if (nam == NULL) {
903 error = ENOTCONN;
904 goto release;
905 }
906 tmp = *(struct sockaddr_in6 *)nam;
907 dst = &tmp;
908
909 if (dst->sin6_family != AF_INET6) {
910 error = EAFNOSUPPORT;
911 goto release;
912 }
913 }
914 error = rip6_output(m, so, dst, control);
915 m = NULL;
916
917release:
918 if (m)
919 m_freem(m);
920
921 return error;
922}
923
924static int
925rip6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
926{
927 KASSERT(solocked(so));
928
929 if (m)
930 m_freem(m);
931
932 return EOPNOTSUPP;
933}
934
935static int
936rip6_purgeif(struct socket *so, struct ifnet *ifp)
937{
938
939#ifndef NET_MPSAFE
940 mutex_enter(softnet_lock);
941#endif
942 in6_pcbpurgeif0(&raw6cbtable, ifp);
943 in6_purgeif(ifp);
944 in6_pcbpurgeif(&raw6cbtable, ifp);
945#ifndef NET_MPSAFE
946 mutex_exit(softnet_lock);
947#endif
948
949 return 0;
950}
951
952static int
953sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS)
954{
955
956 return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS));
957}
958
959static void
960sysctl_net_inet6_raw6_setup(struct sysctllog **clog)
961{
962
963 sysctl_createv(clog, 0, NULL, NULL,
964 CTLFLAG_PERMANENT,
965 CTLTYPE_NODE, "inet6", NULL,
966 NULL, 0, NULL, 0,
967 CTL_NET, PF_INET6, CTL_EOL);
968 sysctl_createv(clog, 0, NULL, NULL,
969 CTLFLAG_PERMANENT,
970 CTLTYPE_NODE, "raw6",
971 SYSCTL_DESCR("Raw IPv6 settings"),
972 NULL, 0, NULL, 0,
973 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL);
974
975 sysctl_createv(clog, 0, NULL, NULL,
976 CTLFLAG_PERMANENT,
977 CTLTYPE_STRUCT, "pcblist",
978 SYSCTL_DESCR("Raw IPv6 control block list"),
979 sysctl_inpcblist, 0, &raw6cbtable, 0,
980 CTL_NET, PF_INET6, IPPROTO_RAW,
981 CTL_CREATE, CTL_EOL);
982 sysctl_createv(clog, 0, NULL, NULL,
983 CTLFLAG_PERMANENT,
984 CTLTYPE_STRUCT, "stats",
985 SYSCTL_DESCR("Raw IPv6 statistics"),
986 sysctl_net_inet6_raw6_stats, 0, NULL, 0,
987 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS,
988 CTL_EOL);
989}
990
991PR_WRAP_USRREQS(rip6)
992#define rip6_attach rip6_attach_wrapper
993#define rip6_detach rip6_detach_wrapper
994#define rip6_accept rip6_accept_wrapper
995#define rip6_bind rip6_bind_wrapper
996#define rip6_listen rip6_listen_wrapper
997#define rip6_connect rip6_connect_wrapper
998#define rip6_connect2 rip6_connect2_wrapper
999#define rip6_disconnect rip6_disconnect_wrapper
1000#define rip6_shutdown rip6_shutdown_wrapper
1001#define rip6_abort rip6_abort_wrapper
1002#define rip6_ioctl rip6_ioctl_wrapper
1003#define rip6_stat rip6_stat_wrapper
1004#define rip6_peeraddr rip6_peeraddr_wrapper
1005#define rip6_sockaddr rip6_sockaddr_wrapper
1006#define rip6_rcvd rip6_rcvd_wrapper
1007#define rip6_recvoob rip6_recvoob_wrapper
1008#define rip6_send rip6_send_wrapper
1009#define rip6_sendoob rip6_sendoob_wrapper
1010#define rip6_purgeif rip6_purgeif_wrapper
1011
1012const struct pr_usrreqs rip6_usrreqs = {
1013 .pr_attach = rip6_attach,
1014 .pr_detach = rip6_detach,
1015 .pr_accept = rip6_accept,
1016 .pr_bind = rip6_bind,
1017 .pr_listen = rip6_listen,
1018 .pr_connect = rip6_connect,
1019 .pr_connect2 = rip6_connect2,
1020 .pr_disconnect = rip6_disconnect,
1021 .pr_shutdown = rip6_shutdown,
1022 .pr_abort = rip6_abort,
1023 .pr_ioctl = rip6_ioctl,
1024 .pr_stat = rip6_stat,
1025 .pr_peeraddr = rip6_peeraddr,
1026 .pr_sockaddr = rip6_sockaddr,
1027 .pr_rcvd = rip6_rcvd,
1028 .pr_recvoob = rip6_recvoob,
1029 .pr_send = rip6_send,
1030 .pr_sendoob = rip6_sendoob,
1031 .pr_purgeif = rip6_purgeif,
1032};
1033