1/*	$OpenBSD: raw_ip6.c,v 1.184 2024/04/17 20:48:51 bluhm Exp $	*/
2/*	$KAME: raw_ip6.c,v 1.69 2001/03/04 15:55:44 itojun 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 "pf.h"
65
66#include <sys/param.h>
67#include <sys/malloc.h>
68#include <sys/mbuf.h>
69#include <sys/socket.h>
70#include <sys/protosw.h>
71#include <sys/socketvar.h>
72#include <sys/errno.h>
73#include <sys/systm.h>
74#include <sys/sysctl.h>
75
76#include <net/if.h>
77#include <net/if_var.h>
78#include <net/route.h>
79
80#include <netinet/in.h>
81#include <netinet6/in6_var.h>
82#include <netinet/ip6.h>
83#include <netinet6/ip6_var.h>
84#ifdef MROUTING
85#include <netinet6/ip6_mroute.h>
86#endif
87#include <netinet/icmp6.h>
88#include <netinet/ip.h>
89#include <netinet/in_pcb.h>
90#include <netinet6/nd6.h>
91#include <netinet6/ip6protosw.h>
92#include <netinet6/raw_ip6.h>
93
94#if NPF > 0
95#include <net/pfvar.h>
96#endif
97
98#include <sys/stdarg.h>
99
100/*
101 * Raw interface to IP6 protocol.
102 */
103
104struct	inpcbtable rawin6pcbtable;
105
106struct cpumem *rip6counters;
107
108const struct pr_usrreqs rip6_usrreqs = {
109	.pru_attach	= rip6_attach,
110	.pru_detach	= rip6_detach,
111	.pru_lock	= rip6_lock,
112	.pru_unlock	= rip6_unlock,
113	.pru_locked	= rip6_locked,
114	.pru_bind	= rip6_bind,
115	.pru_connect	= rip6_connect,
116	.pru_disconnect	= rip6_disconnect,
117	.pru_shutdown	= rip6_shutdown,
118	.pru_send	= rip6_send,
119	.pru_control	= in6_control,
120	.pru_sockaddr	= in6_sockaddr,
121	.pru_peeraddr	= in6_peeraddr,
122};
123
124/*
125 * Initialize raw connection block queue.
126 */
127void
128rip6_init(void)
129{
130	in_pcbinit(&rawin6pcbtable, 1);
131	rip6counters = counters_alloc(rip6s_ncounters);
132}
133
134int
135rip6_input(struct mbuf **mp, int *offp, int proto, int af)
136{
137	struct mbuf *m = *mp;
138	struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
139	struct inpcb *inp;
140	SIMPLEQ_HEAD(, inpcb) inpcblist;
141	struct in6_addr *key;
142	struct sockaddr_in6 rip6src;
143	uint8_t type;
144
145	KASSERT(af == AF_INET6);
146
147	if (proto == IPPROTO_ICMPV6) {
148		struct icmp6_hdr *icmp6;
149
150		IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, *offp,
151		    sizeof(*icmp6));
152		if (icmp6 == NULL)
153			return IPPROTO_DONE;
154		type = icmp6->icmp6_type;
155	} else
156		rip6stat_inc(rip6s_ipackets);
157
158	memset(&rip6src, 0, sizeof(rip6src));
159	rip6src.sin6_family = AF_INET6;
160	rip6src.sin6_len = sizeof(rip6src);
161	/* KAME hack: recover scopeid */
162	in6_recoverscope(&rip6src, &ip6->ip6_src);
163
164	key = &ip6->ip6_dst;
165#if NPF > 0
166	if (m->m_pkthdr.pf.flags & PF_TAG_DIVERTED) {
167		struct pf_divert *divert;
168
169		divert = pf_find_divert(m);
170		KASSERT(divert != NULL);
171		switch (divert->type) {
172		case PF_DIVERT_TO:
173			key = &divert->addr.v6;
174			break;
175		case PF_DIVERT_REPLY:
176			break;
177		default:
178			panic("%s: unknown divert type %d, mbuf %p, divert %p",
179			    __func__, divert->type, m, divert);
180		}
181	}
182#endif
183	SIMPLEQ_INIT(&inpcblist);
184	rw_enter_write(&rawin6pcbtable.inpt_notify);
185	mtx_enter(&rawin6pcbtable.inpt_mtx);
186	TAILQ_FOREACH(inp, &rawin6pcbtable.inpt_queue, inp_queue) {
187		KASSERT(ISSET(inp->inp_flags, INP_IPV6));
188
189		/*
190		 * Packet must not be inserted after disconnected wakeup
191		 * call.  To avoid race, check again when holding receive
192		 * buffer mutex.
193		 */
194		if (ISSET(READ_ONCE(inp->inp_socket->so_rcv.sb_state),
195		    SS_CANTRCVMORE))
196			continue;
197		if (rtable_l2(inp->inp_rtableid) !=
198		    rtable_l2(m->m_pkthdr.ph_rtableid))
199			continue;
200
201		if ((inp->inp_ipv6.ip6_nxt || proto == IPPROTO_ICMPV6) &&
202		    inp->inp_ipv6.ip6_nxt != proto)
203			continue;
204		if (!IN6_IS_ADDR_UNSPECIFIED(&inp->inp_laddr6) &&
205		    !IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, key))
206			continue;
207		if (!IN6_IS_ADDR_UNSPECIFIED(&inp->inp_faddr6) &&
208		    !IN6_ARE_ADDR_EQUAL(&inp->inp_faddr6, &ip6->ip6_src))
209			continue;
210		if (proto == IPPROTO_ICMPV6 && inp->inp_icmp6filt) {
211			if (ICMP6_FILTER_WILLBLOCK(type, inp->inp_icmp6filt))
212				continue;
213		}
214		if (proto != IPPROTO_ICMPV6 && inp->inp_cksum6 != -1) {
215			rip6stat_inc(rip6s_isum);
216			/*
217			 * Although in6_cksum() does not need the position of
218			 * the checksum field for verification, enforce that it
219			 * is located within the packet.  Userland has given
220			 * a checksum offset, a packet too short for that is
221			 * invalid.  Avoid overflow with user supplied offset.
222			 */
223			if (m->m_pkthdr.len < *offp + 2 ||
224			    m->m_pkthdr.len - *offp - 2 < inp->inp_cksum6 ||
225			    in6_cksum(m, proto, *offp,
226			    m->m_pkthdr.len - *offp)) {
227				rip6stat_inc(rip6s_badsum);
228				continue;
229			}
230		}
231
232		in_pcbref(inp);
233		SIMPLEQ_INSERT_TAIL(&inpcblist, inp, inp_notify);
234	}
235	mtx_leave(&rawin6pcbtable.inpt_mtx);
236
237	if (SIMPLEQ_EMPTY(&inpcblist)) {
238		struct counters_ref ref;
239		uint64_t *counters;
240
241		rw_exit_write(&rawin6pcbtable.inpt_notify);
242
243		if (proto != IPPROTO_ICMPV6) {
244			rip6stat_inc(rip6s_nosock);
245			if (m->m_flags & M_MCAST)
246				rip6stat_inc(rip6s_nosockmcast);
247		}
248		if (proto == IPPROTO_NONE || proto == IPPROTO_ICMPV6) {
249			m_freem(m);
250		} else {
251			int prvnxt = ip6_get_prevhdr(m, *offp);
252
253			icmp6_error(m, ICMP6_PARAM_PROB,
254			    ICMP6_PARAMPROB_NEXTHEADER, prvnxt);
255		}
256		counters = counters_enter(&ref, ip6counters);
257		counters[ip6s_delivered]--;
258		counters_leave(&ref, ip6counters);
259
260		return IPPROTO_DONE;
261	}
262
263	while ((inp = SIMPLEQ_FIRST(&inpcblist)) != NULL) {
264		struct mbuf *n, *opts = NULL;
265
266		SIMPLEQ_REMOVE_HEAD(&inpcblist, inp_notify);
267		if (SIMPLEQ_EMPTY(&inpcblist))
268			n = m;
269		else
270			n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
271		if (n != NULL) {
272			struct socket *so = inp->inp_socket;
273			int ret = 0;
274
275			if (inp->inp_flags & IN6P_CONTROLOPTS)
276				ip6_savecontrol(inp, n, &opts);
277			/* strip intermediate headers */
278			m_adj(n, *offp);
279
280			mtx_enter(&so->so_rcv.sb_mtx);
281			if (!ISSET(inp->inp_socket->so_rcv.sb_state,
282			    SS_CANTRCVMORE)) {
283				ret = sbappendaddr(so, &so->so_rcv,
284				    sin6tosa(&rip6src), n, opts);
285			}
286			mtx_leave(&so->so_rcv.sb_mtx);
287
288			if (ret == 0) {
289				m_freem(n);
290				m_freem(opts);
291				rip6stat_inc(rip6s_fullsock);
292			} else
293				sorwakeup(so);
294		}
295		in_pcbunref(inp);
296	}
297	rw_exit_write(&rawin6pcbtable.inpt_notify);
298
299	return IPPROTO_DONE;
300}
301
302void
303rip6_ctlinput(int cmd, struct sockaddr *sa, u_int rdomain, void *d)
304{
305	struct ip6_hdr *ip6;
306	struct ip6ctlparam *ip6cp = NULL;
307	struct sockaddr_in6 *sa6 = satosin6(sa);
308	const struct sockaddr_in6 *sa6_src = NULL;
309	void *cmdarg;
310	void (*notify)(struct inpcb *, int) = in_rtchange;
311	int nxt;
312
313	if (sa->sa_family != AF_INET6 ||
314	    sa->sa_len != sizeof(struct sockaddr_in6))
315		return;
316
317	if ((unsigned)cmd >= PRC_NCMDS)
318		return;
319	if (PRC_IS_REDIRECT(cmd))
320		notify = in_rtchange, d = NULL;
321	else if (cmd == PRC_HOSTDEAD)
322		d = NULL;
323	else if (cmd == PRC_MSGSIZE)
324		; /* special code is present, see below */
325	else if (inet6ctlerrmap[cmd] == 0)
326		return;
327
328	/* if the parameter is from icmp6, decode it. */
329	if (d != NULL) {
330		ip6cp = (struct ip6ctlparam *)d;
331		ip6 = ip6cp->ip6c_ip6;
332		cmdarg = ip6cp->ip6c_cmdarg;
333		sa6_src = ip6cp->ip6c_src;
334		nxt = ip6cp->ip6c_nxt;
335	} else {
336		ip6 = NULL;
337		cmdarg = NULL;
338		sa6_src = &sa6_any;
339		nxt = -1;
340	}
341
342	if (ip6 && cmd == PRC_MSGSIZE) {
343		int valid = 0;
344		struct inpcb *inp;
345
346		/*
347		 * Check to see if we have a valid raw IPv6 socket
348		 * corresponding to the address in the ICMPv6 message
349		 * payload, and the protocol (ip6_nxt) meets the socket.
350		 * XXX chase extension headers, or pass final nxt value
351		 * from icmp6_notify_error()
352		 */
353		inp = in6_pcblookup(&rawin6pcbtable, &sa6->sin6_addr, 0,
354		    &sa6_src->sin6_addr, 0, rdomain);
355
356		if (inp && inp->inp_ipv6.ip6_nxt &&
357		    inp->inp_ipv6.ip6_nxt == nxt)
358			valid = 1;
359
360		/*
361		 * Depending on the value of "valid" and routing table
362		 * size (mtudisc_{hi,lo}wat), we will:
363		 * - recalculate the new MTU and create the
364		 *   corresponding routing entry, or
365		 * - ignore the MTU change notification.
366		 */
367		icmp6_mtudisc_update((struct ip6ctlparam *)d, valid);
368		in_pcbunref(inp);
369
370		/*
371		 * regardless of if we called icmp6_mtudisc_update(),
372		 * we need to call in6_pcbnotify(), to notify path
373		 * MTU change to the userland (2292bis-02), because
374		 * some unconnected sockets may share the same
375		 * destination and want to know the path MTU.
376		 */
377	}
378
379	in6_pcbnotify(&rawin6pcbtable, sa6, 0,
380	    sa6_src, 0, rdomain, cmd, cmdarg, notify);
381}
382
383/*
384 * Generate IPv6 header and pass packet to ip6_output.
385 * Tack on options user may have setup with control call.
386 */
387int
388rip6_output(struct mbuf *m, struct socket *so, struct sockaddr *dstaddr,
389    struct mbuf *control)
390{
391	struct in6_addr *dst;
392	struct ip6_hdr *ip6;
393	struct inpcb *inp;
394	u_int	plen = m->m_pkthdr.len;
395	int error = 0;
396	struct ip6_pktopts opt, *optp = NULL;
397	int type;		/* for ICMPv6 output statistics only */
398	int priv = 0;
399	int flags;
400
401	inp = sotoinpcb(so);
402
403	priv = 0;
404	if ((so->so_state & SS_PRIV) != 0)
405		priv = 1;
406	if (control) {
407		if ((error = ip6_setpktopts(control, &opt,
408		    inp->inp_outputopts6,
409		    priv, so->so_proto->pr_protocol)) != 0)
410			goto bad;
411		optp = &opt;
412	} else
413		optp = inp->inp_outputopts6;
414
415	if (dstaddr->sa_family != AF_INET6) {
416		error = EAFNOSUPPORT;
417		goto bad;
418	}
419	dst = &satosin6(dstaddr)->sin6_addr;
420	if (IN6_IS_ADDR_V4MAPPED(dst)) {
421		error = EADDRNOTAVAIL;
422		goto bad;
423	}
424
425	/*
426	 * For an ICMPv6 packet, we should know its type and code
427	 * to update statistics.
428	 */
429	if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
430		struct icmp6_hdr *icmp6;
431		if (m->m_len < sizeof(struct icmp6_hdr) &&
432		    (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
433			error = ENOBUFS;
434			goto bad;
435		}
436		icmp6 = mtod(m, struct icmp6_hdr *);
437		type = icmp6->icmp6_type;
438	}
439
440	M_PREPEND(m, sizeof(*ip6), M_DONTWAIT);
441	if (!m) {
442		error = ENOBUFS;
443		goto bad;
444	}
445	ip6 = mtod(m, struct ip6_hdr *);
446
447	/*
448	 * Next header might not be ICMP6 but use its pseudo header anyway.
449	 */
450	ip6->ip6_dst = *dst;
451
452	/* KAME hack: embed scopeid */
453	if (in6_embedscope(&ip6->ip6_dst, satosin6(dstaddr),
454	    optp, inp->inp_moptions6) != 0) {
455		error = EINVAL;
456		goto bad;
457	}
458
459	/*
460	 * Source address selection.
461	 */
462	{
463		const struct in6_addr *in6a;
464
465		error = in6_pcbselsrc(&in6a, satosin6(dstaddr), inp, optp);
466		if (error)
467			goto bad;
468
469		ip6->ip6_src = *in6a;
470	}
471
472	ip6->ip6_flow = inp->inp_flowinfo & IPV6_FLOWINFO_MASK;
473	ip6->ip6_vfc  &= ~IPV6_VERSION_MASK;
474	ip6->ip6_vfc  |= IPV6_VERSION;
475#if 0				/* ip6_plen will be filled in ip6_output. */
476	ip6->ip6_plen  = htons((u_short)plen);
477#endif
478	ip6->ip6_nxt   = inp->inp_ipv6.ip6_nxt;
479	ip6->ip6_hlim = in6_selecthlim(inp);
480
481	if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
482	    inp->inp_cksum6 != -1) {
483		struct mbuf *n;
484		int off;
485		u_int16_t *sump;
486		int sumoff;
487
488		/* compute checksum */
489		if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
490			off = offsetof(struct icmp6_hdr, icmp6_cksum);
491		else
492			off = inp->inp_cksum6;
493		if (plen < 2 || plen - 2 < off) {
494			error = EINVAL;
495			goto bad;
496		}
497		off += sizeof(struct ip6_hdr);
498
499		n = m_pulldown(m, off, sizeof(*sump), &sumoff);
500		if (n == NULL) {
501			m = NULL;
502			error = ENOBUFS;
503			goto bad;
504		}
505		sump = (u_int16_t *)(mtod(n, caddr_t) + sumoff);
506		*sump = 0;
507		*sump = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
508	}
509
510	flags = 0;
511	if (inp->inp_flags & IN6P_MINMTU)
512		flags |= IPV6_MINMTU;
513
514	/* force routing table */
515	m->m_pkthdr.ph_rtableid = inp->inp_rtableid;
516
517#if NPF > 0
518	if (inp->inp_socket->so_state & SS_ISCONNECTED &&
519	    so->so_proto->pr_protocol != IPPROTO_ICMPV6)
520		pf_mbuf_link_inpcb(m, inp);
521#endif
522
523	error = ip6_output(m, optp, &inp->inp_route, flags,
524	    inp->inp_moptions6, &inp->inp_seclevel);
525	if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
526		icmp6stat_inc(icp6s_outhist + type);
527	} else
528		rip6stat_inc(rip6s_opackets);
529
530	goto freectl;
531
532 bad:
533	m_freem(m);
534
535 freectl:
536	if (control) {
537		ip6_clearpktopts(&opt, -1);
538		m_freem(control);
539	}
540	return (error);
541}
542
543/*
544 * Raw IPv6 socket option processing.
545 */
546int
547rip6_ctloutput(int op, struct socket *so, int level, int optname,
548    struct mbuf *m)
549{
550#ifdef MROUTING
551	int error;
552#endif
553
554	switch (level) {
555	case IPPROTO_IPV6:
556		switch (optname) {
557#ifdef MROUTING
558		case MRT6_INIT:
559		case MRT6_DONE:
560		case MRT6_ADD_MIF:
561		case MRT6_DEL_MIF:
562		case MRT6_ADD_MFC:
563		case MRT6_DEL_MFC:
564			if (op == PRCO_SETOPT) {
565				error = ip6_mrouter_set(optname, so, m);
566			} else if (op == PRCO_GETOPT)
567				error = ip6_mrouter_get(optname, so, m);
568			else
569				error = EINVAL;
570			return (error);
571#endif
572		case IPV6_CHECKSUM:
573			return (ip6_raw_ctloutput(op, so, level, optname, m));
574		default:
575			return (ip6_ctloutput(op, so, level, optname, m));
576		}
577
578	case IPPROTO_ICMPV6:
579		/*
580		 * XXX: is it better to call icmp6_ctloutput() directly
581		 * from protosw?
582		 */
583		return (icmp6_ctloutput(op, so, level, optname, m));
584
585	default:
586		return EINVAL;
587	}
588}
589
590extern	u_long rip6_sendspace;
591extern	u_long rip6_recvspace;
592
593int
594rip6_attach(struct socket *so, int proto, int wait)
595{
596	struct inpcb *inp;
597	int error;
598
599	if (so->so_pcb)
600		panic("%s", __func__);
601	if ((so->so_state & SS_PRIV) == 0)
602		return (EACCES);
603	if (proto < 0 || proto >= IPPROTO_MAX)
604		return EPROTONOSUPPORT;
605
606	if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)))
607		return error;
608	NET_ASSERT_LOCKED();
609	if ((error = in_pcballoc(so, &rawin6pcbtable, wait)))
610		return error;
611
612	inp = sotoinpcb(so);
613	inp->inp_ipv6.ip6_nxt = proto;
614	inp->inp_cksum6 = -1;
615
616	inp->inp_icmp6filt = malloc(sizeof(struct icmp6_filter), M_PCB,
617	    wait == M_WAIT ? M_WAITOK : M_NOWAIT);
618	if (inp->inp_icmp6filt == NULL) {
619		in_pcbdetach(inp);
620		return ENOMEM;
621	}
622	ICMP6_FILTER_SETPASSALL(inp->inp_icmp6filt);
623	return 0;
624}
625
626int
627rip6_detach(struct socket *so)
628{
629	struct inpcb *inp = sotoinpcb(so);
630
631	soassertlocked(so);
632
633	if (inp == NULL)
634		panic("%s", __func__);
635#ifdef MROUTING
636	if (so == ip6_mrouter[inp->inp_rtableid])
637		ip6_mrouter_done(so);
638#endif
639	free(inp->inp_icmp6filt, M_PCB, sizeof(struct icmp6_filter));
640	inp->inp_icmp6filt = NULL;
641
642	in_pcbdetach(inp);
643
644	return (0);
645}
646
647void
648rip6_lock(struct socket *so)
649{
650	struct inpcb *inp = sotoinpcb(so);
651
652	NET_ASSERT_LOCKED();
653	mtx_enter(&inp->inp_mtx);
654}
655
656void
657rip6_unlock(struct socket *so)
658{
659	struct inpcb *inp = sotoinpcb(so);
660
661	NET_ASSERT_LOCKED();
662	mtx_leave(&inp->inp_mtx);
663}
664
665int
666rip6_locked(struct socket *so)
667{
668	struct inpcb *inp = sotoinpcb(so);
669
670	return mtx_owned(&inp->inp_mtx);
671}
672
673int
674rip6_bind(struct socket *so, struct mbuf *nam, struct proc *p)
675{
676	struct inpcb *inp = sotoinpcb(so);
677	struct sockaddr_in6 *addr;
678	int error;
679
680	soassertlocked(so);
681
682	if ((error = in6_nam2sin6(nam, &addr)))
683		return (error);
684
685	/*
686	 * Make sure to not enter in_pcblookup_local(), local ports
687	 * are non-sensical for raw sockets.
688	 */
689	addr->sin6_port = 0;
690
691	if ((error = in6_pcbaddrisavail(inp, addr, 0, p)))
692		return (error);
693
694	mtx_enter(&rawin6pcbtable.inpt_mtx);
695	inp->inp_laddr6 = addr->sin6_addr;
696	mtx_leave(&rawin6pcbtable.inpt_mtx);
697
698	return (0);
699}
700
701int
702rip6_connect(struct socket *so, struct mbuf *nam)
703{
704	struct inpcb *inp = sotoinpcb(so);
705	struct sockaddr_in6 *addr;
706	const struct in6_addr *in6a;
707	int error;
708
709	soassertlocked(so);
710
711	if ((error = in6_nam2sin6(nam, &addr)))
712		return (error);
713
714	/* Source address selection. XXX: need pcblookup? */
715	error = in6_pcbselsrc(&in6a, addr, inp, inp->inp_outputopts6);
716	if (error)
717		return (error);
718
719	mtx_enter(&rawin6pcbtable.inpt_mtx);
720	inp->inp_laddr6 = *in6a;
721	inp->inp_faddr6 = addr->sin6_addr;
722	mtx_leave(&rawin6pcbtable.inpt_mtx);
723	soisconnected(so);
724
725	return (0);
726}
727
728int
729rip6_disconnect(struct socket *so)
730{
731	struct inpcb *inp = sotoinpcb(so);
732
733	soassertlocked(so);
734
735	if ((so->so_state & SS_ISCONNECTED) == 0)
736		return (ENOTCONN);
737
738	soisdisconnected(so);
739	mtx_enter(&rawin6pcbtable.inpt_mtx);
740	inp->inp_faddr6 = in6addr_any;
741	mtx_leave(&rawin6pcbtable.inpt_mtx);
742
743	return (0);
744}
745
746int
747rip6_shutdown(struct socket *so)
748{
749	/*
750	 * Mark the connection as being incapable of further input.
751	 */
752	soassertlocked(so);
753	socantsendmore(so);
754	return (0);
755}
756
757int
758rip6_send(struct socket *so, struct mbuf *m, struct mbuf *nam,
759	struct mbuf *control)
760{
761	struct inpcb *inp = sotoinpcb(so);
762	struct sockaddr_in6 dst;
763	int error;
764
765	soassertlocked(so);
766
767	/*
768	 * Ship a packet out. The appropriate raw output
769	 * routine handles any messaging necessary.
770	 */
771
772	/* always copy sockaddr to avoid overwrites */
773	memset(&dst, 0, sizeof(dst));
774	dst.sin6_family = AF_INET6;
775	dst.sin6_len = sizeof(dst);
776	if (so->so_state & SS_ISCONNECTED) {
777		if (nam) {
778			error = EISCONN;
779			goto out;
780		}
781		dst.sin6_addr = inp->inp_faddr6;
782	} else {
783		struct sockaddr_in6 *addr6;
784
785		if (nam == NULL) {
786			error = ENOTCONN;
787			goto out;
788		}
789		if ((error = in6_nam2sin6(nam, &addr6)))
790			goto out;
791		dst.sin6_addr = addr6->sin6_addr;
792		dst.sin6_scope_id = addr6->sin6_scope_id;
793	}
794	error = rip6_output(m, so, sin6tosa(&dst), control);
795	control = NULL;
796	m = NULL;
797
798out:
799	m_freem(control);
800	m_freem(m);
801
802	return (error);
803}
804
805int
806rip6_sysctl_rip6stat(void *oldp, size_t *oldplen, void *newp)
807{
808	struct rip6stat rip6stat;
809
810	CTASSERT(sizeof(rip6stat) == rip6s_ncounters * sizeof(uint64_t));
811	counters_read(rip6counters, (uint64_t *)&rip6stat, rip6s_ncounters,
812	    NULL);
813
814	return (sysctl_rdstruct(oldp, oldplen, newp,
815	    &rip6stat, sizeof(rip6stat)));
816}
817
818int
819rip6_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp,
820    void *newp, size_t newlen)
821{
822	/* All sysctl names at this level are terminal. */
823	if (namelen != 1)
824		return ENOTDIR;
825
826	switch (name[0]) {
827	case RIPV6CTL_STATS:
828		return (rip6_sysctl_rip6stat(oldp, oldlenp, newp));
829	default:
830		return (EOPNOTSUPP);
831	}
832	/* NOTREACHED */
833}
834