2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $FreeBSD: src/sys/netinet6/raw_ip6.c,v 1.7.2.7 2003/01/24 05:11:35 sam Exp $
30 * $DragonFly: src/sys/netinet6/raw_ip6.c,v 1.18 2005/03/06 05:09:25 hsu Exp $
34 * Copyright (c) 1982, 1986, 1988, 1993
35 * The Regents of the University of California. All rights reserved.
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
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. All advertising materials mentioning features or use of this software
46 * must display the following acknowledgement:
47 * This product includes software developed by the University of
48 * California, Berkeley and its contributors.
49 * 4. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
68 #include "opt_ipsec.h"
69 #include "opt_inet6.h"
71 #include <sys/param.h>
72 #include <sys/malloc.h>
75 #include <sys/socket.h>
76 #include <sys/protosw.h>
77 #include <sys/socketvar.h>
78 #include <sys/errno.h>
79 #include <sys/systm.h>
82 #include <net/route.h>
83 #include <net/if_types.h>
85 #include <netinet/in.h>
86 #include <netinet/in_var.h>
87 #include <netinet/in_systm.h>
88 #include <netinet/ip6.h>
89 #include <netinet6/ip6_var.h>
90 #include <netinet6/ip6_mroute.h>
91 #include <netinet/icmp6.h>
92 #include <netinet/in_pcb.h>
93 #include <netinet6/in6_pcb.h>
94 #include <netinet6/nd6.h>
95 #include <netinet6/ip6protosw.h>
96 #ifdef ENABLE_DEFAULT_SCOPE
97 #include <netinet6/scope6_var.h>
99 #include <netinet6/raw_ip6.h>
102 #include <netinet6/ipsec.h>
103 #include <netinet6/ipsec6.h>
107 #include <netproto/ipsec/ipsec.h>
108 #include <netproto/ipsec/ipsec6.h>
109 #endif /* FAST_IPSEC */
111 #include <machine/stdarg.h>
113 #define satosin6(sa) ((struct sockaddr_in6 *)(sa))
114 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
117 * Raw interface to IP6 protocol.
120 extern struct inpcbinfo ripcbinfo;
121 extern u_long rip_sendspace;
122 extern u_long rip_recvspace;
124 struct rip6stat rip6stat;
127 * Setup generic address and protocol structures
128 * for raw_input routine, then pass them along with
132 rip6_input(struct mbuf **mp, int *offp, int proto)
134 struct mbuf *m = *mp;
135 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
137 struct inpcb *last = 0;
138 struct mbuf *opts = NULL;
139 struct sockaddr_in6 rip6src;
141 rip6stat.rip6s_ipackets++;
143 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
144 /* XXX send icmp6 host/port unreach? */
149 init_sin6(&rip6src, m); /* general init */
151 LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
152 if (in6p->in6p_flags & INP_PLACEMARKER)
154 if ((in6p->in6p_vflag & INP_IPV6) == 0)
156 if (in6p->in6p_ip6_nxt &&
157 in6p->in6p_ip6_nxt != proto)
159 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
160 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
162 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
163 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
165 if (in6p->in6p_cksum != -1) {
166 rip6stat.rip6s_isum++;
167 if (in6_cksum(m, ip6->ip6_nxt, *offp,
168 m->m_pkthdr.len - *offp)) {
169 rip6stat.rip6s_badsum++;
174 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
178 * Check AH/ESP integrity.
180 if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
182 ipsec6stat.in_polvio++;
183 /* do not inject data into pcb */
188 * Check AH/ESP integrity.
190 if (n && ipsec6_in_reject(n, last)) {
192 /* do not inject data into pcb */
194 #endif /*FAST_IPSEC*/
196 if (last->in6p_flags & IN6P_CONTROLOPTS ||
197 last->in6p_socket->so_options & SO_TIMESTAMP)
198 ip6_savecontrol(last, &opts, ip6, n);
199 /* strip intermediate headers */
201 if (sbappendaddr(&last->in6p_socket->so_rcv,
202 (struct sockaddr *)&rip6src,
207 rip6stat.rip6s_fullsock++;
209 sorwakeup(last->in6p_socket);
217 * Check AH/ESP integrity.
219 if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
221 ipsec6stat.in_polvio++;
222 ip6stat.ip6s_delivered--;
223 /* do not inject data into pcb */
228 * Check AH/ESP integrity.
230 if (last && ipsec6_in_reject(m, last)) {
232 ip6stat.ip6s_delivered--;
233 /* do not inject data into pcb */
235 #endif /*FAST_IPSEC*/
237 if (last->in6p_flags & IN6P_CONTROLOPTS ||
238 last->in6p_socket->so_options & SO_TIMESTAMP)
239 ip6_savecontrol(last, &opts, ip6, m);
240 /* strip intermediate headers */
242 if (sbappendaddr(&last->in6p_socket->so_rcv,
243 (struct sockaddr *)&rip6src, m, opts) == 0) {
247 rip6stat.rip6s_fullsock++;
249 sorwakeup(last->in6p_socket);
251 rip6stat.rip6s_nosock++;
252 if (m->m_flags & M_MCAST)
253 rip6stat.rip6s_nosockmcast++;
254 if (proto == IPPROTO_NONE)
257 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
258 icmp6_error(m, ICMP6_PARAM_PROB,
259 ICMP6_PARAMPROB_NEXTHEADER,
260 prvnxtp - mtod(m, char *));
262 ip6stat.ip6s_delivered--;
268 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d)
273 struct ip6ctlparam *ip6cp = NULL;
274 const struct sockaddr_in6 *sa6_src = NULL;
275 void (*notify) (struct inpcb *, int) = in6_rtchange;
277 if (sa->sa_family != AF_INET6 ||
278 sa->sa_len != sizeof(struct sockaddr_in6))
281 if ((unsigned)cmd >= PRC_NCMDS)
283 if (PRC_IS_REDIRECT(cmd))
284 notify = in6_rtchange, d = NULL;
285 else if (cmd == PRC_HOSTDEAD)
287 else if (inet6ctlerrmap[cmd] == 0)
290 /* if the parameter is from icmp6, decode it. */
292 ip6cp = (struct ip6ctlparam *)d;
294 ip6 = ip6cp->ip6c_ip6;
295 off = ip6cp->ip6c_off;
296 sa6_src = ip6cp->ip6c_src;
303 in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0,
304 (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
308 * Generate IPv6 header and pass packet to ip6_output.
309 * Tack on options user may have setup with control call.
312 rip6_output(struct mbuf *m, struct socket *so, ...)
314 struct sockaddr_in6 *dstsock;
315 struct mbuf *control;
316 struct in6_addr *dst;
319 u_int plen = m->m_pkthdr.len;
321 struct ip6_pktopts opt, *optp = 0;
322 struct ifnet *oifp = NULL;
323 int type = 0, code = 0; /* for ICMPv6 output statistics only */
328 dstsock = __va_arg(ap, struct sockaddr_in6 *);
329 control = __va_arg(ap, struct mbuf *);
335 if (so->so_cred->cr_uid == 0)
337 dst = &dstsock->sin6_addr;
339 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0)
343 optp = in6p->in6p_outputopts;
346 * For an ICMPv6 packet, we should know its type and code
347 * to update statistics.
349 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
350 struct icmp6_hdr *icmp6;
351 if (m->m_len < sizeof(struct icmp6_hdr) &&
352 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
356 icmp6 = mtod(m, struct icmp6_hdr *);
357 type = icmp6->icmp6_type;
358 code = icmp6->icmp6_code;
361 M_PREPEND(m, sizeof(*ip6), MB_WAIT);
362 ip6 = mtod(m, struct ip6_hdr *);
365 * Next header might not be ICMP6 but use its pseudo header anyway.
370 * If the scope of the destination is link-local, embed the interface
371 * index in the address.
373 * XXX advanced-api value overrides sin6_scope_id
375 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
376 struct in6_pktinfo *pi;
379 * XXX Boundary check is assumed to be already done in
380 * ip6_setpktoptions().
382 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
383 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
384 oifp = ifindex2ifnet[pi->ipi6_ifindex];
385 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
386 in6p->in6p_moptions &&
387 in6p->in6p_moptions->im6o_multicast_ifp) {
388 oifp = in6p->in6p_moptions->im6o_multicast_ifp;
389 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
390 } else if (dstsock->sin6_scope_id) {
392 if (dstsock->sin6_scope_id < 0
393 || if_index < dstsock->sin6_scope_id) {
394 error = ENXIO; /* XXX EINVAL? */
397 ip6->ip6_dst.s6_addr16[1]
398 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
403 * Source address selection.
406 struct in6_addr *in6a;
408 if ((in6a = in6_selectsrc(dstsock, optp,
414 error = EADDRNOTAVAIL;
417 ip6->ip6_src = *in6a;
418 if (in6p->in6p_route.ro_rt)
419 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
421 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
422 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
423 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
424 (IPV6_VERSION & IPV6_VERSION_MASK);
425 /* ip6_plen will be filled in ip6_output, so not fill it here. */
426 ip6->ip6_nxt = in6p->in6p_ip6_nxt;
427 ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
429 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
430 in6p->in6p_cksum != -1) {
435 /* compute checksum */
436 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
437 off = offsetof(struct icmp6_hdr, icmp6_cksum);
439 off = in6p->in6p_cksum;
440 if (plen < off + 1) {
444 off += sizeof(struct ip6_hdr);
447 while (n && n->m_len <= off) {
453 p = (u_int16_t *)(mtod(n, caddr_t) + off);
455 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
458 error = ip6_output(m, optp, &in6p->in6p_route, 0,
459 in6p->in6p_moptions, &oifp, in6p);
460 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
462 icmp6_ifoutstat_inc(oifp, type, code);
463 icmp6stat.icp6s_outhist[type]++;
465 rip6stat.rip6s_opackets++;
474 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
475 RTFREE(optp->ip6po_route.ro_rt);
478 ip6_clearpktopts(optp, 0, -1);
485 * Raw IPv6 socket option processing.
488 rip6_ctloutput(struct socket *so, struct sockopt *sopt)
492 if (sopt->sopt_level == IPPROTO_ICMPV6)
494 * XXX: is it better to call icmp6_ctloutput() directly
497 return(icmp6_ctloutput(so, sopt));
498 else if (sopt->sopt_level != IPPROTO_IPV6)
503 switch (sopt->sopt_dir) {
505 switch (sopt->sopt_name) {
513 error = ip6_mrouter_get(so, sopt);
516 error = ip6_ctloutput(so, sopt);
522 switch (sopt->sopt_name) {
530 error = ip6_mrouter_set(so, sopt);
533 error = ip6_ctloutput(so, sopt);
543 rip6_attach(struct socket *so, int proto, struct pru_attach_info *ai)
550 panic("rip6_attach");
551 if ((error = suser_cred(ai->p_ucred, NULL_CRED_OKAY)) != 0)
554 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
558 error = in_pcballoc(so, &ripcbinfo);
562 inp = (struct inpcb *)so->so_pcb;
563 inp->inp_vflag |= INP_IPV6;
564 inp->in6p_ip6_nxt = (long)proto;
565 inp->in6p_hops = -1; /* use kernel default */
566 inp->in6p_cksum = -1;
567 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *,
568 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
569 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
574 rip6_detach(struct socket *so)
580 panic("rip6_detach");
582 if (so == ip6_mrouter)
584 if (inp->in6p_icmp6filt) {
585 FREE(inp->in6p_icmp6filt, M_PCB);
586 inp->in6p_icmp6filt = NULL;
593 rip6_abort(struct socket *so)
595 soisdisconnected(so);
596 return rip6_detach(so);
600 rip6_disconnect(struct socket *so)
602 struct inpcb *inp = so->so_pcb;
604 if ((so->so_state & SS_ISCONNECTED) == 0)
606 inp->in6p_faddr = in6addr_any;
607 return rip6_abort(so);
611 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
613 struct inpcb *inp = so->so_pcb;
614 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
615 struct ifaddr *ia = NULL;
617 if (nam->sa_len != sizeof(*addr))
620 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6)
621 return EADDRNOTAVAIL;
622 #ifdef ENABLE_DEFAULT_SCOPE
623 if (addr->sin6_scope_id == 0) { /* not change if specified */
624 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
627 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
628 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0)
629 return EADDRNOTAVAIL;
631 ((struct in6_ifaddr *)ia)->ia6_flags &
632 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
633 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
634 return(EADDRNOTAVAIL);
636 inp->in6p_laddr = addr->sin6_addr;
641 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
643 struct inpcb *inp = so->so_pcb;
644 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
645 struct in6_addr *in6a = NULL;
647 #ifdef ENABLE_DEFAULT_SCOPE
648 struct sockaddr_in6 tmp;
651 if (nam->sa_len != sizeof(*addr))
653 if (TAILQ_EMPTY(&ifnet))
654 return EADDRNOTAVAIL;
655 if (addr->sin6_family != AF_INET6)
657 #ifdef ENABLE_DEFAULT_SCOPE
658 if (addr->sin6_scope_id == 0) { /* not change if specified */
659 /* avoid overwrites */
662 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
665 /* Source address selection. XXX: need pcblookup? */
666 in6a = in6_selectsrc(addr, inp->in6p_outputopts,
667 inp->in6p_moptions, &inp->in6p_route,
668 &inp->in6p_laddr, &error);
670 return (error ? error : EADDRNOTAVAIL);
671 inp->in6p_laddr = *in6a;
672 inp->in6p_faddr = addr->sin6_addr;
678 rip6_shutdown(struct socket *so)
685 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
686 struct mbuf *control, struct thread *td)
688 struct inpcb *inp = so->so_pcb;
689 struct sockaddr_in6 tmp;
690 struct sockaddr_in6 *dst;
692 /* always copy sockaddr to avoid overwrites */
693 if (so->so_state & SS_ISCONNECTED) {
699 bzero(&tmp, sizeof(tmp));
700 tmp.sin6_family = AF_INET6;
701 tmp.sin6_len = sizeof(struct sockaddr_in6);
702 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
703 sizeof(struct in6_addr));
710 tmp = *(struct sockaddr_in6 *)nam;
713 #ifdef ENABLE_DEFAULT_SCOPE
714 if (dst->sin6_scope_id == 0) { /* not change if specified */
715 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
718 return rip6_output(m, so, dst, control);
721 struct pr_usrreqs rip6_usrreqs = {
722 rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect,
723 pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect,
724 pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp,
725 pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown,
726 in6_setsockaddr, sosend, soreceive, sopoll