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 1.27 2008/09/04 09:08:22 hasso 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>
76 #include <sys/socket.h>
78 #include <sys/protosw.h>
79 #include <sys/socketvar.h>
80 #include <sys/errno.h>
81 #include <sys/systm.h>
83 #include <sys/thread2.h>
84 #include <sys/socketvar2.h>
87 #include <net/route.h>
88 #include <net/if_types.h>
90 #include <netinet/in.h>
91 #include <netinet/in_var.h>
92 #include <netinet/in_systm.h>
93 #include <netinet/ip6.h>
94 #include <netinet6/ip6_var.h>
95 #include <netinet6/ip6_mroute.h>
96 #include <netinet/icmp6.h>
97 #include <netinet/in_pcb.h>
98 #include <netinet6/in6_pcb.h>
99 #include <netinet6/nd6.h>
100 #include <netinet6/ip6protosw.h>
101 #ifdef ENABLE_DEFAULT_SCOPE
102 #include <netinet6/scope6_var.h>
104 #include <netinet6/raw_ip6.h>
107 #include <netinet6/ipsec.h>
108 #include <netinet6/ipsec6.h>
112 #include <netproto/ipsec/ipsec.h>
113 #include <netproto/ipsec/ipsec6.h>
114 #endif /* FAST_IPSEC */
116 #include <machine/stdarg.h>
118 #define satosin6(sa) ((struct sockaddr_in6 *)(sa))
119 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
122 * Raw interface to IP6 protocol.
125 extern struct inpcbinfo ripcbinfo;
126 extern u_long rip_sendspace;
127 extern u_long rip_recvspace;
129 struct rip6stat rip6stat;
132 * Setup generic address and protocol structures
133 * for raw_input routine, then pass them along with
137 rip6_input(struct mbuf **mp, int *offp, int proto)
139 struct mbuf *m = *mp;
140 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
142 struct inpcb *last = 0;
143 struct mbuf *opts = NULL;
144 struct sockaddr_in6 rip6src;
146 rip6stat.rip6s_ipackets++;
148 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
149 /* XXX send icmp6 host/port unreach? */
154 init_sin6(&rip6src, m); /* general init */
156 LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
157 if (in6p->in6p_flags & INP_PLACEMARKER)
159 if (!(in6p->in6p_vflag & INP_IPV6))
161 if (in6p->in6p_ip6_nxt &&
162 in6p->in6p_ip6_nxt != proto)
164 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
165 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
167 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
168 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
170 if (in6p->in6p_cksum != -1) {
171 rip6stat.rip6s_isum++;
172 if (in6_cksum(m, ip6->ip6_nxt, *offp,
173 m->m_pkthdr.len - *offp)) {
174 rip6stat.rip6s_badsum++;
179 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
183 * Check AH/ESP integrity.
185 if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
187 ipsec6stat.in_polvio++;
188 /* do not inject data into pcb */
193 * Check AH/ESP integrity.
195 if (n && ipsec6_in_reject(n, last)) {
197 /* do not inject data into pcb */
199 #endif /*FAST_IPSEC*/
201 if (last->in6p_flags & IN6P_CONTROLOPTS ||
202 last->in6p_socket->so_options & SO_TIMESTAMP)
203 ip6_savecontrol(last, &opts, ip6, n);
204 /* strip intermediate headers */
206 if (ssb_appendaddr(&last->in6p_socket->so_rcv,
207 (struct sockaddr *)&rip6src,
212 rip6stat.rip6s_fullsock++;
214 sorwakeup(last->in6p_socket);
222 * Check AH/ESP integrity.
224 if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
226 ipsec6stat.in_polvio++;
227 ip6stat.ip6s_delivered--;
228 /* do not inject data into pcb */
233 * Check AH/ESP integrity.
235 if (last && ipsec6_in_reject(m, last)) {
237 ip6stat.ip6s_delivered--;
238 /* do not inject data into pcb */
240 #endif /*FAST_IPSEC*/
242 if (last->in6p_flags & IN6P_CONTROLOPTS ||
243 last->in6p_socket->so_options & SO_TIMESTAMP)
244 ip6_savecontrol(last, &opts, ip6, m);
245 /* strip intermediate headers */
247 if (ssb_appendaddr(&last->in6p_socket->so_rcv,
248 (struct sockaddr *)&rip6src, m, opts) == 0) {
252 rip6stat.rip6s_fullsock++;
254 sorwakeup(last->in6p_socket);
256 rip6stat.rip6s_nosock++;
257 if (m->m_flags & M_MCAST)
258 rip6stat.rip6s_nosockmcast++;
259 if (proto == IPPROTO_NONE)
262 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
263 icmp6_error(m, ICMP6_PARAM_PROB,
264 ICMP6_PARAMPROB_NEXTHEADER,
265 prvnxtp - mtod(m, char *));
267 ip6stat.ip6s_delivered--;
273 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d)
278 struct ip6ctlparam *ip6cp = NULL;
279 const struct sockaddr_in6 *sa6_src = NULL;
280 void (*notify) (struct inpcb *, int) = in6_rtchange;
282 if (sa->sa_family != AF_INET6 ||
283 sa->sa_len != sizeof(struct sockaddr_in6))
286 if ((unsigned)cmd >= PRC_NCMDS)
288 if (PRC_IS_REDIRECT(cmd))
289 notify = in6_rtchange, d = NULL;
290 else if (cmd == PRC_HOSTDEAD)
292 else if (inet6ctlerrmap[cmd] == 0)
295 /* if the parameter is from icmp6, decode it. */
297 ip6cp = (struct ip6ctlparam *)d;
299 ip6 = ip6cp->ip6c_ip6;
300 off = ip6cp->ip6c_off;
301 sa6_src = ip6cp->ip6c_src;
308 in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0,
309 (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
313 * Generate IPv6 header and pass packet to ip6_output.
314 * Tack on options user may have setup with control call.
317 rip6_output(struct mbuf *m, struct socket *so, ...)
319 struct sockaddr_in6 *dstsock;
320 struct mbuf *control;
321 struct in6_addr *dst;
324 u_int plen = m->m_pkthdr.len;
326 struct ip6_pktopts opt, *optp = 0;
327 struct ifnet *oifp = NULL;
328 int type = 0, code = 0; /* for ICMPv6 output statistics only */
333 dstsock = __va_arg(ap, struct sockaddr_in6 *);
334 control = __va_arg(ap, struct mbuf *);
340 if (so->so_cred->cr_uid == 0)
342 dst = &dstsock->sin6_addr;
344 if ((error = ip6_setpktoptions(control, &opt,
345 in6p->in6p_outputopts,
346 so->so_proto->pr_protocol, priv)) != 0)
350 optp = in6p->in6p_outputopts;
353 * For an ICMPv6 packet, we should know its type and code
354 * to update statistics.
356 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
357 struct icmp6_hdr *icmp6;
358 if (m->m_len < sizeof(struct icmp6_hdr) &&
359 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
363 icmp6 = mtod(m, struct icmp6_hdr *);
364 type = icmp6->icmp6_type;
365 code = icmp6->icmp6_code;
368 M_PREPEND(m, sizeof(*ip6), MB_WAIT);
369 ip6 = mtod(m, struct ip6_hdr *);
372 * Next header might not be ICMP6 but use its pseudo header anyway.
377 * If the scope of the destination is link-local, embed the interface
378 * index in the address.
380 * XXX advanced-api value overrides sin6_scope_id
382 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
383 struct in6_pktinfo *pi;
386 * XXX Boundary check is assumed to be already done in
387 * ip6_setpktoptions().
389 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
390 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
391 oifp = ifindex2ifnet[pi->ipi6_ifindex];
392 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
393 in6p->in6p_moptions &&
394 in6p->in6p_moptions->im6o_multicast_ifp) {
395 oifp = in6p->in6p_moptions->im6o_multicast_ifp;
396 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
397 } else if (dstsock->sin6_scope_id) {
399 if (dstsock->sin6_scope_id < 0
400 || if_index < dstsock->sin6_scope_id) {
401 error = ENXIO; /* XXX EINVAL? */
404 ip6->ip6_dst.s6_addr16[1]
405 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
410 * Source address selection.
413 struct in6_addr *in6a;
415 if ((in6a = in6_selectsrc(dstsock, optp,
419 &error, NULL)) == NULL) {
421 error = EADDRNOTAVAIL;
424 ip6->ip6_src = *in6a;
425 if (in6p->in6p_route.ro_rt)
426 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
428 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
429 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
430 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
431 (IPV6_VERSION & IPV6_VERSION_MASK);
432 /* ip6_plen will be filled in ip6_output, so not fill it here. */
433 ip6->ip6_nxt = in6p->in6p_ip6_nxt;
434 ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
436 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
437 in6p->in6p_cksum != -1) {
442 /* compute checksum */
443 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
444 off = offsetof(struct icmp6_hdr, icmp6_cksum);
446 off = in6p->in6p_cksum;
447 if (plen < off + 1) {
451 off += sizeof(struct ip6_hdr);
454 while (n && n->m_len <= off) {
460 p = (u_int16_t *)(mtod(n, caddr_t) + off);
462 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
465 error = ip6_output(m, optp, &in6p->in6p_route, 0,
466 in6p->in6p_moptions, &oifp, in6p);
467 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
469 icmp6_ifoutstat_inc(oifp, type, code);
470 icmp6stat.icp6s_outhist[type]++;
472 rip6stat.rip6s_opackets++;
481 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
482 RTFREE(optp->ip6po_route.ro_rt);
485 ip6_clearpktopts(optp, -1);
492 * Raw IPv6 socket option processing.
495 rip6_ctloutput(struct socket *so, struct sockopt *sopt)
499 if (sopt->sopt_level == IPPROTO_ICMPV6)
501 * XXX: is it better to call icmp6_ctloutput() directly
504 return (icmp6_ctloutput(so, sopt));
505 else if (sopt->sopt_level != IPPROTO_IPV6)
510 switch (sopt->sopt_dir) {
512 switch (sopt->sopt_name) {
520 error = ip6_mrouter_get(so, sopt);
523 error = ip6_raw_ctloutput(so, sopt);
526 error = ip6_ctloutput(so, sopt);
532 switch (sopt->sopt_name) {
540 error = ip6_mrouter_set(so, sopt);
543 error = ip6_raw_ctloutput(so, sopt);
546 error = ip6_ctloutput(so, sopt);
556 rip6_attach(struct socket *so, int proto, struct pru_attach_info *ai)
563 panic("rip6_attach");
564 error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
568 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
572 error = in_pcballoc(so, &ripcbinfo);
576 inp = (struct inpcb *)so->so_pcb;
577 inp->inp_vflag |= INP_IPV6;
578 inp->in6p_ip6_nxt = (long)proto;
579 inp->in6p_hops = -1; /* use kernel default */
580 inp->in6p_cksum = -1;
581 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *,
582 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
583 if (inp->in6p_icmp6filt != NULL)
584 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
589 rip6_detach(struct socket *so)
595 panic("rip6_detach");
597 if (so == ip6_mrouter)
599 if (inp->in6p_icmp6filt) {
600 FREE(inp->in6p_icmp6filt, M_PCB);
601 inp->in6p_icmp6filt = NULL;
608 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
609 * will sofree() it when we return.
612 rip6_abort(struct socket *so)
616 soisdisconnected(so);
617 error = rip6_detach(so);
623 rip6_disconnect(struct socket *so)
625 struct inpcb *inp = so->so_pcb;
628 if (!(so->so_state & SS_ISCONNECTED))
630 inp->in6p_faddr = kin6addr_any;
632 error = rip6_abort(so);
639 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
641 struct inpcb *inp = so->so_pcb;
642 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
643 struct ifaddr *ia = NULL;
645 if (nam->sa_len != sizeof(*addr))
648 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6)
649 return EADDRNOTAVAIL;
650 #ifdef ENABLE_DEFAULT_SCOPE
651 if (addr->sin6_scope_id == 0) { /* not change if specified */
652 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
655 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
656 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL)
657 return EADDRNOTAVAIL;
659 ((struct in6_ifaddr *)ia)->ia6_flags &
660 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
661 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
662 return (EADDRNOTAVAIL);
664 inp->in6p_laddr = addr->sin6_addr;
669 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
671 struct inpcb *inp = so->so_pcb;
672 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
673 struct in6_addr *in6a = NULL;
675 #ifdef ENABLE_DEFAULT_SCOPE
676 struct sockaddr_in6 tmp;
679 if (nam->sa_len != sizeof(*addr))
681 if (TAILQ_EMPTY(&ifnet))
682 return EADDRNOTAVAIL;
683 if (addr->sin6_family != AF_INET6)
685 #ifdef ENABLE_DEFAULT_SCOPE
686 if (addr->sin6_scope_id == 0) { /* not change if specified */
687 /* avoid overwrites */
690 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
693 /* Source address selection. XXX: need pcblookup? */
694 in6a = in6_selectsrc(addr, inp->in6p_outputopts,
695 inp->in6p_moptions, &inp->in6p_route,
696 &inp->in6p_laddr, &error, NULL);
698 return (error ? error : EADDRNOTAVAIL);
699 inp->in6p_laddr = *in6a;
700 inp->in6p_faddr = addr->sin6_addr;
706 rip6_shutdown(struct socket *so)
713 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
714 struct mbuf *control, struct thread *td)
716 struct inpcb *inp = so->so_pcb;
717 struct sockaddr_in6 tmp;
718 struct sockaddr_in6 *dst;
720 /* always copy sockaddr to avoid overwrites */
721 if (so->so_state & SS_ISCONNECTED) {
727 bzero(&tmp, sizeof(tmp));
728 tmp.sin6_family = AF_INET6;
729 tmp.sin6_len = sizeof(struct sockaddr_in6);
730 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
731 sizeof(struct in6_addr));
738 tmp = *(struct sockaddr_in6 *)nam;
741 #ifdef ENABLE_DEFAULT_SCOPE
742 if (dst->sin6_scope_id == 0) { /* not change if specified */
743 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
746 return rip6_output(m, so, dst, control);
749 struct pr_usrreqs rip6_usrreqs = {
750 .pru_abort = rip6_abort,
751 .pru_accept = pru_accept_notsupp,
752 .pru_attach = rip6_attach,
753 .pru_bind = rip6_bind,
754 .pru_connect = rip6_connect,
755 .pru_connect2 = pru_connect2_notsupp,
756 .pru_control = in6_control,
757 .pru_detach = rip6_detach,
758 .pru_disconnect = rip6_disconnect,
759 .pru_listen = pru_listen_notsupp,
760 .pru_peeraddr = in6_setpeeraddr,
761 .pru_rcvd = pru_rcvd_notsupp,
762 .pru_rcvoob = pru_rcvoob_notsupp,
763 .pru_send = rip6_send,
764 .pru_sense = pru_sense_null,
765 .pru_shutdown = rip6_shutdown,
766 .pru_sockaddr = in6_setsockaddr,
767 .pru_sosend = sosend,
768 .pru_soreceive = soreceive