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 $
33 * Copyright (c) 1982, 1986, 1988, 1993
34 * The Regents of the University of California. All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. All advertising materials mentioning features or use of this software
45 * must display the following acknowledgement:
46 * This product includes software developed by the University of
47 * California, Berkeley and its contributors.
48 * 4. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
67 #include "opt_ipsec.h"
68 #include "opt_inet6.h"
70 #include <sys/param.h>
71 #include <sys/malloc.h>
74 #include <sys/socket.h>
75 #include <sys/protosw.h>
76 #include <sys/socketvar.h>
77 #include <sys/errno.h>
78 #include <sys/systm.h>
81 #include <net/route.h>
82 #include <net/if_types.h>
84 #include <netinet/in.h>
85 #include <netinet/in_var.h>
86 #include <netinet/in_systm.h>
87 #include <netinet/ip6.h>
88 #include <netinet6/ip6_var.h>
89 #include <netinet6/ip6_mroute.h>
90 #include <netinet/icmp6.h>
91 #include <netinet/in_pcb.h>
92 #include <netinet6/in6_pcb.h>
93 #include <netinet6/nd6.h>
94 #include <netinet6/ip6protosw.h>
95 #ifdef ENABLE_DEFAULT_SCOPE
96 #include <netinet6/scope6_var.h>
98 #include <netinet6/raw_ip6.h>
101 #include <netinet6/ipsec.h>
102 #include <netinet6/ipsec6.h>
106 #include <netipsec/ipsec.h>
107 #include <netipsec/ipsec6.h>
108 #endif /* FAST_IPSEC */
110 #include <machine/stdarg.h>
112 #define satosin6(sa) ((struct sockaddr_in6 *)(sa))
113 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
116 * Raw interface to IP6 protocol.
119 extern struct inpcbhead ripcb;
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(mp, offp, proto)
136 struct mbuf *m = *mp;
137 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
138 register struct inpcb *in6p;
139 struct inpcb *last = 0;
140 struct mbuf *opts = NULL;
141 struct sockaddr_in6 rip6src;
143 rip6stat.rip6s_ipackets++;
145 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
146 /* XXX send icmp6 host/port unreach? */
151 init_sin6(&rip6src, m); /* general init */
153 LIST_FOREACH(in6p, &ripcb, inp_list) {
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(cmd, sa, d)
276 struct ip6ctlparam *ip6cp = NULL;
277 const struct sockaddr_in6 *sa6_src = NULL;
278 void (*notify) __P((struct inpcb *, int)) = in6_rtchange;
280 if (sa->sa_family != AF_INET6 ||
281 sa->sa_len != sizeof(struct sockaddr_in6))
284 if ((unsigned)cmd >= PRC_NCMDS)
286 if (PRC_IS_REDIRECT(cmd))
287 notify = in6_rtchange, d = NULL;
288 else if (cmd == PRC_HOSTDEAD)
290 else if (inet6ctlerrmap[cmd] == 0)
293 /* if the parameter is from icmp6, decode it. */
295 ip6cp = (struct ip6ctlparam *)d;
297 ip6 = ip6cp->ip6c_ip6;
298 off = ip6cp->ip6c_off;
299 sa6_src = ip6cp->ip6c_src;
306 (void) in6_pcbnotify(&ripcb, sa, 0, (struct sockaddr *)sa6_src,
311 * Generate IPv6 header and pass packet to ip6_output.
312 * Tack on options user may have setup with control call.
316 rip6_output(struct mbuf *m, ...)
318 rip6_output(m, va_alist)
324 struct sockaddr_in6 *dstsock;
325 struct mbuf *control;
326 struct in6_addr *dst;
329 u_int plen = m->m_pkthdr.len;
331 struct ip6_pktopts opt, *optp = 0;
332 struct ifnet *oifp = NULL;
333 int type = 0, code = 0; /* for ICMPv6 output statistics only */
338 so = va_arg(ap, struct socket *);
339 dstsock = va_arg(ap, struct sockaddr_in6 *);
340 control = va_arg(ap, struct mbuf *);
343 in6p = sotoin6pcb(so);
346 if (so->so_cred->cr_uid == 0)
348 dst = &dstsock->sin6_addr;
350 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0)
354 optp = in6p->in6p_outputopts;
357 * For an ICMPv6 packet, we should know its type and code
358 * to update statistics.
360 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
361 struct icmp6_hdr *icmp6;
362 if (m->m_len < sizeof(struct icmp6_hdr) &&
363 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
367 icmp6 = mtod(m, struct icmp6_hdr *);
368 type = icmp6->icmp6_type;
369 code = icmp6->icmp6_code;
372 M_PREPEND(m, sizeof(*ip6), M_WAIT);
373 ip6 = mtod(m, struct ip6_hdr *);
376 * Next header might not be ICMP6 but use its pseudo header anyway.
381 * If the scope of the destination is link-local, embed the interface
382 * index in the address.
384 * XXX advanced-api value overrides sin6_scope_id
386 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
387 struct in6_pktinfo *pi;
390 * XXX Boundary check is assumed to be already done in
391 * ip6_setpktoptions().
393 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
394 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
395 oifp = ifindex2ifnet[pi->ipi6_ifindex];
396 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
397 in6p->in6p_moptions &&
398 in6p->in6p_moptions->im6o_multicast_ifp) {
399 oifp = in6p->in6p_moptions->im6o_multicast_ifp;
400 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
401 } else if (dstsock->sin6_scope_id) {
403 if (dstsock->sin6_scope_id < 0
404 || if_index < dstsock->sin6_scope_id) {
405 error = ENXIO; /* XXX EINVAL? */
408 ip6->ip6_dst.s6_addr16[1]
409 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
414 * Source address selection.
417 struct in6_addr *in6a;
419 if ((in6a = in6_selectsrc(dstsock, optp,
425 error = EADDRNOTAVAIL;
428 ip6->ip6_src = *in6a;
429 if (in6p->in6p_route.ro_rt)
430 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
432 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
433 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
434 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
435 (IPV6_VERSION & IPV6_VERSION_MASK);
436 /* ip6_plen will be filled in ip6_output, so not fill it here. */
437 ip6->ip6_nxt = in6p->in6p_ip6_nxt;
438 ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
440 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
441 in6p->in6p_cksum != -1) {
446 /* compute checksum */
447 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
448 off = offsetof(struct icmp6_hdr, icmp6_cksum);
450 off = in6p->in6p_cksum;
451 if (plen < off + 1) {
455 off += sizeof(struct ip6_hdr);
458 while (n && n->m_len <= off) {
464 p = (u_int16_t *)(mtod(n, caddr_t) + off);
466 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
469 error = ip6_output(m, optp, &in6p->in6p_route, 0,
470 in6p->in6p_moptions, &oifp, in6p);
471 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
473 icmp6_ifoutstat_inc(oifp, type, code);
474 icmp6stat.icp6s_outhist[type]++;
476 rip6stat.rip6s_opackets++;
485 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
486 RTFREE(optp->ip6po_route.ro_rt);
489 ip6_clearpktopts(optp, 0, -1);
496 * Raw IPv6 socket option processing.
499 rip6_ctloutput(so, sopt)
501 struct sockopt *sopt;
505 if (sopt->sopt_level == IPPROTO_ICMPV6)
507 * XXX: is it better to call icmp6_ctloutput() directly
510 return(icmp6_ctloutput(so, sopt));
511 else if (sopt->sopt_level != IPPROTO_IPV6)
516 switch (sopt->sopt_dir) {
518 switch (sopt->sopt_name) {
526 error = ip6_mrouter_get(so, sopt);
529 error = ip6_ctloutput(so, sopt);
535 switch (sopt->sopt_name) {
543 error = ip6_mrouter_set(so, sopt);
546 error = ip6_ctloutput(so, sopt);
556 rip6_attach(struct socket *so, int proto, struct proc *p)
563 panic("rip6_attach");
564 if (p && (error = suser(p)) != 0)
567 error = soreserve(so, rip_sendspace, rip_recvspace);
571 error = in_pcballoc(so, &ripcbinfo, p);
575 inp = (struct inpcb *)so->so_pcb;
576 inp->inp_vflag |= INP_IPV6;
577 inp->in6p_ip6_nxt = (long)proto;
578 inp->in6p_hops = -1; /* use kernel default */
579 inp->in6p_cksum = -1;
580 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *,
581 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
582 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
587 rip6_detach(struct socket *so)
593 panic("rip6_detach");
595 if (so == ip6_mrouter)
597 if (inp->in6p_icmp6filt) {
598 FREE(inp->in6p_icmp6filt, M_PCB);
599 inp->in6p_icmp6filt = NULL;
606 rip6_abort(struct socket *so)
608 soisdisconnected(so);
609 return rip6_detach(so);
613 rip6_disconnect(struct socket *so)
615 struct inpcb *inp = sotoinpcb(so);
617 if ((so->so_state & SS_ISCONNECTED) == 0)
619 inp->in6p_faddr = in6addr_any;
620 return rip6_abort(so);
624 rip6_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
626 struct inpcb *inp = sotoinpcb(so);
627 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
628 struct ifaddr *ia = NULL;
630 if (nam->sa_len != sizeof(*addr))
633 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6)
634 return EADDRNOTAVAIL;
635 #ifdef ENABLE_DEFAULT_SCOPE
636 if (addr->sin6_scope_id == 0) { /* not change if specified */
637 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
640 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
641 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0)
642 return EADDRNOTAVAIL;
644 ((struct in6_ifaddr *)ia)->ia6_flags &
645 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
646 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
647 return(EADDRNOTAVAIL);
649 inp->in6p_laddr = addr->sin6_addr;
654 rip6_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
656 struct inpcb *inp = sotoinpcb(so);
657 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
658 struct in6_addr *in6a = NULL;
660 #ifdef ENABLE_DEFAULT_SCOPE
661 struct sockaddr_in6 tmp;
664 if (nam->sa_len != sizeof(*addr))
666 if (TAILQ_EMPTY(&ifnet))
667 return EADDRNOTAVAIL;
668 if (addr->sin6_family != AF_INET6)
670 #ifdef ENABLE_DEFAULT_SCOPE
671 if (addr->sin6_scope_id == 0) { /* not change if specified */
672 /* avoid overwrites */
675 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
678 /* Source address selection. XXX: need pcblookup? */
679 in6a = in6_selectsrc(addr, inp->in6p_outputopts,
680 inp->in6p_moptions, &inp->in6p_route,
681 &inp->in6p_laddr, &error);
683 return (error ? error : EADDRNOTAVAIL);
684 inp->in6p_laddr = *in6a;
685 inp->in6p_faddr = addr->sin6_addr;
691 rip6_shutdown(struct socket *so)
698 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
699 struct mbuf *control, struct proc *p)
701 struct inpcb *inp = sotoinpcb(so);
702 struct sockaddr_in6 tmp;
703 struct sockaddr_in6 *dst;
705 /* always copy sockaddr to avoid overwrites */
706 if (so->so_state & SS_ISCONNECTED) {
712 bzero(&tmp, sizeof(tmp));
713 tmp.sin6_family = AF_INET6;
714 tmp.sin6_len = sizeof(struct sockaddr_in6);
715 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
716 sizeof(struct in6_addr));
723 tmp = *(struct sockaddr_in6 *)nam;
726 #ifdef ENABLE_DEFAULT_SCOPE
727 if (dst->sin6_scope_id == 0) { /* not change if specified */
728 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
731 return rip6_output(m, so, dst, control);
734 struct pr_usrreqs rip6_usrreqs = {
735 rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect,
736 pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect,
737 pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp,
738 pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown,
739 in6_setsockaddr, sosend, soreceive, sopoll