Annotation of src/sys/netinet6/ip6_input.c, Revision 1.113.8.1
1.113.8.1! keiichi 1: /* $NetBSD: ip6_input.c,v 1.113 2007/12/04 10:27:34 dyoung Exp $ */
1.40 itojun 2: /* $KAME: ip6_input.c,v 1.188 2001/03/29 05:34:31 itojun Exp $ */
1.3 thorpej 3:
1.2 itojun 4: /*
5: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6: * All rights reserved.
1.21 itojun 7: *
1.2 itojun 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.
1.21 itojun 19: *
1.2 itojun 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.
1.65 agc 45: * 3. Neither the name of the University nor the names of its contributors
1.2 itojun 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: * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
62: */
1.48 lukem 63:
64: #include <sys/cdefs.h>
1.113.8.1! keiichi 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.113 2007/12/04 10:27:34 dyoung Exp $");
1.2 itojun 66:
67: #include "opt_inet.h"
1.85 rpaulo 68: #include "opt_inet6.h"
1.4 thorpej 69: #include "opt_ipsec.h"
1.15 darrenr 70: #include "opt_pfil_hooks.h"
1.2 itojun 71:
72: #include <sys/param.h>
73: #include <sys/systm.h>
74: #include <sys/malloc.h>
75: #include <sys/mbuf.h>
76: #include <sys/domain.h>
77: #include <sys/protosw.h>
78: #include <sys/socket.h>
79: #include <sys/socketvar.h>
80: #include <sys/errno.h>
81: #include <sys/time.h>
82: #include <sys/kernel.h>
83: #include <sys/syslog.h>
84: #include <sys/proc.h>
1.46 simonb 85: #include <sys/sysctl.h>
1.2 itojun 86:
87: #include <net/if.h>
88: #include <net/if_types.h>
89: #include <net/if_dl.h>
90: #include <net/route.h>
91: #include <net/netisr.h>
1.15 darrenr 92: #ifdef PFIL_HOOKS
93: #include <net/pfil.h>
94: #endif
1.2 itojun 95:
96: #include <netinet/in.h>
1.9 itojun 97: #include <netinet/in_systm.h>
98: #ifdef INET
99: #include <netinet/ip.h>
100: #include <netinet/ip_icmp.h>
1.45 itojun 101: #endif /* INET */
1.14 itojun 102: #include <netinet/ip6.h>
1.2 itojun 103: #include <netinet6/in6_var.h>
1.11 itojun 104: #include <netinet6/ip6_var.h>
1.2 itojun 105: #include <netinet6/in6_pcb.h>
1.14 itojun 106: #include <netinet/icmp6.h>
1.81 rpaulo 107: #include <netinet6/scope6_var.h>
1.2 itojun 108: #include <netinet6/in6_ifattach.h>
109: #include <netinet6/nd6.h>
110:
1.37 itojun 111: #ifdef IPSEC
112: #include <netinet6/ipsec.h>
113: #endif
114:
1.94 degroote 115: #ifdef FAST_IPSEC
116: #include <netipsec/ipsec.h>
117: #include <netipsec/ipsec6.h>
118: #include <netipsec/key.h>
119: #endif /* FAST_IPSEC */
120:
1.2 itojun 121: #include <netinet6/ip6protosw.h>
122:
123: #include "faith.h"
124: #include "gif.h"
1.50 itojun 125:
126: #if NGIF > 0
127: #include <netinet6/in6_gif.h>
128: #endif
1.2 itojun 129:
1.9 itojun 130: #include <net/net_osdep.h>
131:
1.2 itojun 132: extern struct domain inet6domain;
133:
134: u_char ip6_protox[IPPROTO_MAX];
135: static int ip6qmaxlen = IFQ_MAXLEN;
136: struct in6_ifaddr *in6_ifaddr;
137: struct ifqueue ip6intrq;
138:
1.108 ad 139: extern callout_t in6_tmpaddrtimer_ch;
1.83 rpaulo 140:
1.2 itojun 141: int ip6_forward_srcrt; /* XXX */
142: int ip6_sourcecheck; /* XXX */
143: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 144:
1.29 thorpej 145: #ifdef PFIL_HOOKS
146: struct pfil_head inet6_pfil_hook;
147: #endif
148:
1.2 itojun 149: struct ip6stat ip6stat;
150:
1.111 dyoung 151: static void ip6_init2(void *);
1.112 dyoung 152: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 153:
1.111 dyoung 154: static int ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *);
155: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.2 itojun 156:
157: /*
158: * IP6 initialization: fill in IP6 protocol switch table.
159: * All protocols not implemented in kernel go to raw IP6 protocol handler.
160: */
161: void
162: ip6_init()
163: {
1.78 christos 164: const struct ip6protosw *pr;
1.35 itojun 165: int i;
1.2 itojun 166:
1.78 christos 167: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 168: if (pr == 0)
169: panic("ip6_init");
170: for (i = 0; i < IPPROTO_MAX; i++)
171: ip6_protox[i] = pr - inet6sw;
1.78 christos 172: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
173: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 174: if (pr->pr_domain->dom_family == PF_INET6 &&
175: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
176: ip6_protox[pr->pr_protocol] = pr - inet6sw;
177: ip6intrq.ifq_maxlen = ip6qmaxlen;
1.81 rpaulo 178: scope6_init();
179: addrsel_policy_init();
1.2 itojun 180: nd6_init();
181: frag6_init();
1.83 rpaulo 182: ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 183:
184: ip6_init2((void *)0);
1.98 liamjfoy 185: #ifdef GATEWAY
1.99 liamjfoy 186: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 187: #endif
1.29 thorpej 188:
189: #ifdef PFIL_HOOKS
190: /* Register our Packet Filter hook. */
1.33 thorpej 191: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
192: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 193: i = pfil_head_register(&inet6_pfil_hook);
194: if (i != 0)
195: printf("ip6_init: WARNING: unable to register pfil hook, "
196: "error %d\n", i);
197: #endif /* PFIL_HOOKS */
1.2 itojun 198: }
199:
200: static void
1.90 christos 201: ip6_init2(void *dummy)
1.2 itojun 202: {
203:
204: /* nd6_timer_init */
1.108 ad 205: callout_init(&nd6_timer_ch, 0);
1.19 thorpej 206: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83 rpaulo 207:
208: /* timer for regeneranation of temporary addresses randomize ID */
1.108 ad 209: callout_init(&in6_tmpaddrtimer_ch, 0);
1.83 rpaulo 210: callout_reset(&in6_tmpaddrtimer_ch,
211: (ip6_temp_preferred_lifetime - ip6_desync_factor -
212: ip6_temp_regen_advance) * hz,
213: in6_tmpaddrtimer, NULL);
1.2 itojun 214: }
215:
216: /*
217: * IP6 input interrupt handling. Just pass the packet to ip6_input.
218: */
219: void
220: ip6intr()
221: {
222: int s;
223: struct mbuf *m;
224:
225: for (;;) {
1.41 thorpej 226: s = splnet();
1.2 itojun 227: IF_DEQUEUE(&ip6intrq, m);
228: splx(s);
229: if (m == 0)
230: return;
1.83 rpaulo 231: /* drop the packet if IPv6 operation is disabled on the IF */
232: if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {
233: m_freem(m);
234: return;
235: }
1.2 itojun 236: ip6_input(m);
237: }
238: }
239:
1.103 dyoung 240: extern struct route ip6_forward_rt;
1.2 itojun 241:
242: void
1.96 dyoung 243: ip6_input(struct mbuf *m)
1.2 itojun 244: {
1.9 itojun 245: struct ip6_hdr *ip6;
1.105 dyoung 246: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 247: u_int32_t plen;
1.5 itojun 248: u_int32_t rtalert = ~0;
1.104 yamt 249: int nxt, ours = 0, rh_present = 0;
1.9 itojun 250: struct ifnet *deliverifp = NULL;
1.64 itojun 251: int srcrt = 0;
1.105 dyoung 252: const struct rtentry *rt;
253: union {
254: struct sockaddr dst;
255: struct sockaddr_in6 dst6;
256: } u;
1.94 degroote 257: #ifdef FAST_IPSEC
258: struct m_tag *mtag;
259: struct tdb_ident *tdbi;
260: struct secpolicy *sp;
261: int s, error;
262: #endif
1.2 itojun 263:
264: #ifdef IPSEC
265: /*
266: * should the inner packet be considered authentic?
267: * see comment in ah4_input().
268: */
1.49 itojun 269: m->m_flags &= ~M_AUTHIPHDR;
270: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 271: #endif
1.9 itojun 272:
1.2 itojun 273: /*
1.81 rpaulo 274: * make sure we don't have onion peering information into m_tag.
275: */
276: ip6_delaux(m);
277:
278: /*
1.44 itojun 279: * mbuf statistics
1.2 itojun 280: */
281: if (m->m_flags & M_EXT) {
282: if (m->m_next)
283: ip6stat.ip6s_mext2m++;
284: else
285: ip6stat.ip6s_mext1++;
286: } else {
1.96 dyoung 287: #define M2MMAX __arraycount(ip6stat.ip6s_m2m)
1.2 itojun 288: if (m->m_next) {
1.9 itojun 289: if (m->m_flags & M_LOOP) {
1.77 peter 290: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 291: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 292: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
293: else
294: ip6stat.ip6s_m2m[0]++;
295: } else
296: ip6stat.ip6s_m1++;
1.40 itojun 297: #undef M2MMAX
1.2 itojun 298: }
299:
1.9 itojun 300: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
301: ip6stat.ip6s_total++;
302:
1.57 thorpej 303: /*
304: * If the IPv6 header is not aligned, slurp it up into a new
305: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 306: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 307: * IPv6 header is in the first mbuf of the chain.
308: */
1.97 christos 309: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 310: struct ifnet *inifp = m->m_pkthdr.rcvif;
311: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
312: (max_linkhdr + 3) & ~3)) == NULL) {
313: /* XXXJRT new stat, please */
314: ip6stat.ip6s_toosmall++;
315: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
316: return;
317: }
318: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
319: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 320: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 321: ip6stat.ip6s_toosmall++;
322: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
323: return;
324: }
1.2 itojun 325: }
326:
327: ip6 = mtod(m, struct ip6_hdr *);
328:
329: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
330: ip6stat.ip6s_badvers++;
1.9 itojun 331: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 332: goto bad;
333: }
1.15 darrenr 334:
1.98 liamjfoy 335: #if defined(IPSEC)
336: /* IPv6 fast forwarding is not compatible with IPsec. */
337: m->m_flags &= ~M_CANFASTFWD;
338: #else
339: /*
340: * Assume that we can create a fast-forward IP flow entry
341: * based on this packet.
342: */
343: m->m_flags |= M_CANFASTFWD;
344: #endif
345:
1.15 darrenr 346: #ifdef PFIL_HOOKS
347: /*
348: * Run through list of hooks for input packets. If there are any
349: * filters which require that additional packets in the flow are
350: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
351: * Note that filters must _never_ set this flag, as another filter
352: * in the list may have previously cleared it.
353: */
1.39 itojun 354: /*
355: * let ipfilter look at packet on the wire,
356: * not the decapsulated packet.
357: */
358: #ifdef IPSEC
1.42 itojun 359: if (!ipsec_getnhist(m))
1.94 degroote 360: #elif defined(FAST_IPSEC)
361: if (!ipsec_indone(m))
1.39 itojun 362: #else
363: if (1)
364: #endif
365: {
1.64 itojun 366: struct in6_addr odst;
367:
368: odst = ip6->ip6_dst;
1.39 itojun 369: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
370: PFIL_IN) != 0)
371: return;
372: if (m == NULL)
373: return;
374: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 375: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 376: }
1.15 darrenr 377: #endif /* PFIL_HOOKS */
378:
1.2 itojun 379: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
380:
1.30 thorpej 381: #ifdef ALTQ
382: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
383: /* packet is dropped by traffic conditioner */
384: return;
1.9 itojun 385: }
386: #endif
387:
1.2 itojun 388: /*
1.44 itojun 389: * Check against address spoofing/corruption.
1.2 itojun 390: */
391: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
392: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 393: /*
394: * XXX: "badscope" is not very suitable for a multicast source.
395: */
1.2 itojun 396: ip6stat.ip6s_badscope++;
1.9 itojun 397: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 398: goto bad;
399: }
1.13 itojun 400: /*
1.44 itojun 401: * The following check is not documented in specs. A malicious
402: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
403: * and bypass security checks (act as if it was from 127.0.0.1 by using
404: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 405: *
1.44 itojun 406: * This check chokes if we are in an SIIT cloud. As none of BSDs
407: * support IPv4-less kernel compilation, we cannot support SIIT
408: * environment at all. So, it makes more sense for us to reject any
409: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 410: * partial support for SIIT environment.
1.13 itojun 411: */
412: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
413: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
414: ip6stat.ip6s_badscope++;
415: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
416: goto bad;
417: }
1.17 itojun 418: #if 0
1.13 itojun 419: /*
1.17 itojun 420: * Reject packets with IPv4 compatible addresses (auto tunnel).
421: *
422: * The code forbids auto tunnel relay case in RFC1933 (the check is
423: * stronger than RFC1933). We may want to re-enable it if mech-xx
424: * is revised to forbid relaying case.
1.13 itojun 425: */
426: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
427: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
428: ip6stat.ip6s_badscope++;
429: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
430: goto bad;
431: }
432: #endif
1.35 itojun 433:
1.2 itojun 434: /*
1.82 yamt 435: * Disambiguate address scope zones (if there is ambiguity).
436: * We first make sure that the original source or destination address
437: * is not in our internal form for scoped addresses. Such addresses
438: * are not necessarily invalid spec-wise, but we cannot accept them due
439: * to the usage conflict.
440: * in6_setscope() then also checks and rejects the cases where src or
441: * dst are the loopback address and the receiving interface
442: * is not loopback.
443: */
1.88 bouyer 444: if (__predict_false(
445: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
446: goto bad;
447: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 448: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
449: ip6stat.ip6s_badscope++; /* XXX */
450: goto bad;
451: }
452: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
453: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
454: ip6stat.ip6s_badscope++;
455: goto bad;
456: }
457:
458: /*
1.2 itojun 459: * Multicast check
460: */
461: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
462: struct in6_multi *in6m = 0;
1.9 itojun 463:
464: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 465: /*
466: * See if we belong to the destination multicast group on the
467: * arrival interface.
468: */
469: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
470: if (in6m)
471: ours = 1;
472: else if (!ip6_mrouter) {
473: ip6stat.ip6s_notmember++;
474: ip6stat.ip6s_cantforward++;
1.9 itojun 475: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 476: goto bad;
477: }
1.9 itojun 478: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 479: goto hbhcheck;
480: }
481:
1.105 dyoung 482: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
483:
1.2 itojun 484: /*
485: * Unicast check
486: */
1.105 dyoung 487: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
488: if (hit)
489: ip6stat.ip6s_forward_cachehit++;
1.93 joerg 490: else
491: ip6stat.ip6s_forward_cachemiss++;
1.22 itojun 492:
1.109 dyoung 493: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 494:
495: /*
496: * Accept the packet if the forwarding interface to the destination
497: * according to the routing table is the loopback interface,
498: * unless the associated route has a gateway.
499: * Note that this approach causes to accept a packet if there is a
500: * route to the loopback interface for the destination of the packet.
501: * But we think it's even useful in some situations, e.g. when using
502: * a special daemon which wants to intercept the packet.
503: */
1.105 dyoung 504: if (rt != NULL &&
505: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
506: !(rt->rt_flags & RTF_CLONED) &&
1.2 itojun 507: #if 0
508: /*
509: * The check below is redundant since the comparison of
510: * the destination and the key of the rtentry has
511: * already done through looking up the routing table.
512: */
1.109 dyoung 513: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 514: #endif
1.113.8.1! keiichi 515: #ifdef MOBILE_IPV6
! 516: ((rt->rt_flags & RTF_ANNOUNCE) ||
! 517: rt->rt_ifp->if_type == IFT_LOOP)
! 518: #else
! 519: rt->rt_ifp->if_type == IFT_LOOP
! 520: #endif /* MOBILE_IPV6 */
! 521: ) {
1.105 dyoung 522: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 523: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
524: m->m_flags |= M_ANYCAST6;
1.113.8.1! keiichi 525: #ifdef MOBILE_IPV6
! 526: /* check unicast NS */
! 527: if ((rtcache_validate(&ip6_forward_rt)->rt_flags & RTF_ANNOUNCE) != 0) {
! 528: /* This route shows proxy nd. thus the packet was
! 529: * captured. this packet should be tunneled to
! 530: * actual coa with tunneling unless this is NS.
! 531: */
! 532: int nh, loff;
! 533: struct icmp6_hdr *icp;
! 534: loff = ip6_lasthdr(m, 0, IPPROTO_IPV6, &nh);
! 535: if (loff < 0 || nh != IPPROTO_ICMPV6)
! 536: goto mip6_forwarding;
! 537: IP6_EXTHDR_GET(icp, struct icmp6_hdr *, m, loff,
! 538: sizeof(*icp));
! 539: if (icp == NULL) {
! 540: icmp6stat.icp6s_tooshort++;
! 541: return;
! 542: }
! 543: if (icp->icmp6_type != ND_NEIGHBOR_SOLICIT)
! 544: goto mip6_forwarding;
! 545: }
! 546: #endif /* MOBILE_IPV6 */
1.24 itojun 547: /*
548: * packets to a tentative, duplicated, or somehow invalid
549: * address must not be accepted.
550: */
1.2 itojun 551: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 552: /* this address is ready */
1.2 itojun 553: ours = 1;
1.9 itojun 554: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 555: goto hbhcheck;
556: } else {
1.24 itojun 557: /* address is not ready, so discard the packet. */
1.34 itojun 558: nd6log((LOG_INFO,
1.27 itojun 559: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 560: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 561: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 562:
563: goto bad;
1.2 itojun 564: }
565: }
566:
1.113.8.1! keiichi 567: #ifdef MOBILE_IPV6
! 568: mip6_forwarding:
! 569: #endif /* MOBILE_IPV6 */
! 570:
1.2 itojun 571: /*
1.55 itojun 572: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 573: */
574: #if defined(NFAITH) && 0 < NFAITH
575: if (ip6_keepfaith) {
1.105 dyoung 576: if (rt != NULL && rt->rt_ifp != NULL &&
577: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 578: /* XXX do we need more sanity checks? */
579: ours = 1;
1.105 dyoung 580: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 581: goto hbhcheck;
582: }
583: }
584: #endif
585:
586: #if 0
587: {
588: /*
589: * Last resort: check in6_ifaddr for incoming interface.
590: * The code is here until I update the "goto ours hack" code above
591: * working right.
592: */
593: struct ifaddr *ifa;
1.113 dyoung 594: IFADDR_FOREACH(ifa, m->m_pkthdr.rcvif) {
1.9 itojun 595: if (ifa->ifa_addr == NULL)
596: continue; /* just for safety */
597: if (ifa->ifa_addr->sa_family != AF_INET6)
598: continue;
599: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
600: ours = 1;
601: deliverifp = ifa->ifa_ifp;
1.2 itojun 602: goto hbhcheck;
603: }
604: }
1.9 itojun 605: }
1.2 itojun 606: #endif
607:
608: /*
609: * Now there is no reason to process the packet if it's not our own
610: * and we're not a router.
611: */
612: if (!ip6_forwarding) {
613: ip6stat.ip6s_cantforward++;
1.9 itojun 614: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 615: goto bad;
616: }
617:
618: hbhcheck:
619: /*
1.81 rpaulo 620: * record address information into m_tag, if we don't have one yet.
621: * note that we are unable to record it, if the address is not listed
622: * as our interface address (e.g. multicast addresses, addresses
623: * within FAITH prefixes and such).
624: */
1.111 dyoung 625: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 626: struct in6_ifaddr *ia6;
627:
628: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.111 dyoung 629: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
630: /*
631: * XXX maybe we should drop the packet here,
632: * as we could not provide enough information
633: * to the upper layers.
634: */
1.81 rpaulo 635: }
636: }
637:
638: /*
1.2 itojun 639: * Process Hop-by-Hop options header if it's contained.
640: * m may be modified in ip6_hopopts_input().
641: * If a JumboPayload option is included, plen will also be modified.
642: */
643: plen = (u_int32_t)ntohs(ip6->ip6_plen);
644: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 645: struct ip6_hbh *hbh;
646:
647: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
648: #if 0 /*touches NULL pointer*/
649: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
650: #endif
1.2 itojun 651: return; /* m have already been freed */
1.9 itojun 652: }
1.22 itojun 653:
1.2 itojun 654: /* adjust pointer */
655: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 656:
657: /*
1.49 itojun 658: * if the payload length field is 0 and the next header field
1.22 itojun 659: * indicates Hop-by-Hop Options header, then a Jumbo Payload
660: * option MUST be included.
661: */
662: if (ip6->ip6_plen == 0 && plen == 0) {
663: /*
664: * Note that if a valid jumbo payload option is
1.83 rpaulo 665: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 666: * (non-zero) payload length to the variable plen.
1.22 itojun 667: */
668: ip6stat.ip6s_badoptions++;
669: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
670: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
671: icmp6_error(m, ICMP6_PARAM_PROB,
672: ICMP6_PARAMPROB_HEADER,
1.97 christos 673: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 674: return;
675: }
1.9 itojun 676: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
677: sizeof(struct ip6_hbh));
678: if (hbh == NULL) {
679: ip6stat.ip6s_tooshort++;
680: return;
681: }
1.57 thorpej 682: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 683: nxt = hbh->ip6h_nxt;
1.2 itojun 684:
685: /*
686: * accept the packet if a router alert option is included
687: * and we act as an IPv6 router.
688: */
1.5 itojun 689: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 690: ours = 1;
691: } else
692: nxt = ip6->ip6_nxt;
693:
694: /*
695: * Check that the amount of data in the buffers
696: * is as at least much as the IPv6 header would have us expect.
697: * Trim mbufs if longer than we expect.
698: * Drop packet if shorter than we expect.
699: */
700: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
701: ip6stat.ip6s_tooshort++;
1.9 itojun 702: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 703: goto bad;
704: }
705: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
706: if (m->m_len == m->m_pkthdr.len) {
707: m->m_len = sizeof(struct ip6_hdr) + plen;
708: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
709: } else
710: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
711: }
712:
713: /*
714: * Forward if desirable.
715: */
716: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
717: /*
718: * If we are acting as a multicast router, all
719: * incoming multicast packets are passed to the
720: * kernel-level multicast forwarding function.
721: * The packet is returned (relatively) intact; if
722: * ip6_mforward() returns a non-zero value, the packet
723: * must be discarded, else it may be accepted below.
724: */
725: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
726: ip6stat.ip6s_cantforward++;
727: m_freem(m);
728: return;
729: }
730: if (!ours) {
731: m_freem(m);
732: return;
733: }
1.22 itojun 734: } else if (!ours) {
1.64 itojun 735: ip6_forward(m, srcrt);
1.2 itojun 736: return;
1.56 itojun 737: }
1.25 itojun 738:
739: ip6 = mtod(m, struct ip6_hdr *);
740:
741: /*
742: * Malicious party may be able to use IPv4 mapped addr to confuse
743: * tcp/udp stack and bypass security checks (act as if it was from
744: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
745: *
746: * For SIIT end node behavior, you may want to disable the check.
747: * However, you will become vulnerable to attacks using IPv4 mapped
748: * source.
749: */
750: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
751: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
752: ip6stat.ip6s_badscope++;
753: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
754: goto bad;
755: }
1.2 itojun 756:
757: /*
758: * Tell launch routine the next header
759: */
1.12 itojun 760: #ifdef IFA_STATS
1.28 itojun 761: if (deliverifp != NULL) {
1.9 itojun 762: struct in6_ifaddr *ia6;
763: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
764: if (ia6)
765: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
766: }
767: #endif
1.2 itojun 768: ip6stat.ip6s_delivered++;
1.9 itojun 769: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 770: nest = 0;
1.40 itojun 771:
1.104 yamt 772: rh_present = 0;
1.2 itojun 773: while (nxt != IPPROTO_DONE) {
774: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
775: ip6stat.ip6s_toomanyhdr++;
1.104 yamt 776: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 777: goto bad;
778: }
1.8 itojun 779:
780: /*
781: * protection against faulty packet - there should be
782: * more sanity checks in header chain processing.
783: */
784: if (m->m_pkthdr.len < off) {
785: ip6stat.ip6s_tooshort++;
1.9 itojun 786: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 787: goto bad;
788: }
789:
1.104 yamt 790: if (nxt == IPPROTO_ROUTING) {
791: if (rh_present++) {
792: in6_ifstat_inc(m->m_pkthdr.rcvif,
793: ifs6_in_hdrerr);
794: ip6stat.ip6s_badoptions++;
795: goto bad;
796: }
797: }
798:
1.37 itojun 799: #ifdef IPSEC
800: /*
801: * enforce IPsec policy checking if we are seeing last header.
802: * note that we do not visit this with protocols with pcb layer
803: * code - like udp/tcp/raw ip.
804: */
805: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
806: ipsec6_in_reject(m, NULL)) {
807: ipsec6stat.in_polvio++;
808: goto bad;
809: }
810: #endif
1.94 degroote 811: #ifdef FAST_IPSEC
812: /*
813: * enforce IPsec policy checking if we are seeing last header.
814: * note that we do not visit this with protocols with pcb layer
815: * code - like udp/tcp/raw ip.
816: */
817: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
818: /*
819: * Check if the packet has already had IPsec processing
820: * done. If so, then just pass it along. This tag gets
821: * set during AH, ESP, etc. input handling, before the
822: * packet is returned to the ip input queue for delivery.
823: */
824: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
825: s = splsoftnet();
826: if (mtag != NULL) {
827: tdbi = (struct tdb_ident *)(mtag + 1);
828: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
829: } else {
830: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
831: IP_FORWARDING, &error);
832: }
833: if (sp != NULL) {
834: /*
835: * Check security policy against packet attributes.
836: */
837: error = ipsec_in_reject(sp, m);
838: KEY_FREESP(&sp);
839: } else {
840: /* XXX error stat??? */
841: error = EINVAL;
842: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
843: }
844: splx(s);
845: if (error)
846: goto bad;
847: }
848: #endif /* FAST_IPSEC */
849:
1.113.8.1! keiichi 850: if (dest6_mip6_hao(m, off, nxt) < 0)
! 851: goto bad;
1.56 itojun 852:
1.2 itojun 853: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
854: }
855: return;
856: bad:
857: m_freem(m);
858: }
859:
860: /*
1.81 rpaulo 861: * set/grab in6_ifaddr correspond to IPv6 destination address.
862: */
863: static struct m_tag *
1.112 dyoung 864: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 865: {
866: struct m_tag *mtag;
867:
868: mtag = ip6_addaux(m);
1.112 dyoung 869: if (mtag != NULL) {
870: struct ip6aux *ip6a;
871:
872: ip6a = (struct ip6aux *)(mtag + 1);
1.113.8.1! keiichi 873: in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_src_scope_id);
1.112 dyoung 874: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
1.113.8.1! keiichi 875: ip6a->ip6a_src_flags = ia->ia6_flags;
1.112 dyoung 876: }
1.81 rpaulo 877: return mtag; /* NULL if failed to set */
878: }
879:
1.112 dyoung 880: const struct ip6aux *
1.107 christos 881: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 882: {
883: struct m_tag *mtag;
884:
885: mtag = ip6_findaux(m);
1.112 dyoung 886: if (mtag != NULL)
887: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 888: else
889: return NULL;
890: }
891:
892: /*
1.2 itojun 893: * Hop-by-Hop options header processing. If a valid jumbo payload option is
894: * included, the real payload length will be stored in plenp.
1.107 christos 895: *
896: * rtalertp - XXX: should be stored more smart way
1.2 itojun 897: */
898: static int
1.107 christos 899: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
900: struct mbuf **mp, int *offp)
1.2 itojun 901: {
1.35 itojun 902: struct mbuf *m = *mp;
1.2 itojun 903: int off = *offp, hbhlen;
904: struct ip6_hbh *hbh;
905:
906: /* validation of the length of the header */
1.9 itojun 907: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
908: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
909: if (hbh == NULL) {
910: ip6stat.ip6s_tooshort++;
911: return -1;
912: }
913: hbhlen = (hbh->ip6h_len + 1) << 3;
914: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
915: hbhlen);
916: if (hbh == NULL) {
917: ip6stat.ip6s_tooshort++;
918: return -1;
919: }
1.57 thorpej 920: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 921: off += hbhlen;
922: hbhlen -= sizeof(struct ip6_hbh);
923:
924: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
925: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 926: return (-1);
1.2 itojun 927:
928: *offp = off;
929: *mp = m;
1.58 itojun 930: return (0);
1.2 itojun 931: }
932:
933: /*
934: * Search header for all Hop-by-hop options and process each option.
935: * This function is separate from ip6_hopopts_input() in order to
936: * handle a case where the sending node itself process its hop-by-hop
937: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 938: *
939: * The function assumes that hbh header is located right after the IPv6 header
940: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
941: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 942: */
943: int
1.107 christos 944: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
945: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 946: {
947: struct ip6_hdr *ip6;
948: int optlen = 0;
949: u_int8_t *opt = opthead;
950: u_int16_t rtalert_val;
1.22 itojun 951: u_int32_t jumboplen;
1.55 itojun 952: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 953:
954: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 955: switch (*opt) {
956: case IP6OPT_PAD1:
957: optlen = 1;
958: break;
959: case IP6OPT_PADN:
960: if (hbhlen < IP6OPT_MINLEN) {
961: ip6stat.ip6s_toosmall++;
962: goto bad;
963: }
964: optlen = *(opt + 1) + 2;
965: break;
966: case IP6OPT_RTALERT:
967: /* XXX may need check for alignment */
968: if (hbhlen < IP6OPT_RTALERT_LEN) {
969: ip6stat.ip6s_toosmall++;
970: goto bad;
971: }
972: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 973: /* XXX stat */
974: icmp6_error(m, ICMP6_PARAM_PROB,
975: ICMP6_PARAMPROB_HEADER,
976: erroff + opt + 1 - opthead);
977: return (-1);
1.35 itojun 978: }
979: optlen = IP6OPT_RTALERT_LEN;
1.97 christos 980: bcopy((void *)(opt + 2), (void *)&rtalert_val, 2);
1.35 itojun 981: *rtalertp = ntohs(rtalert_val);
982: break;
983: case IP6OPT_JUMBO:
1.22 itojun 984: /* XXX may need check for alignment */
985: if (hbhlen < IP6OPT_JUMBO_LEN) {
986: ip6stat.ip6s_toosmall++;
987: goto bad;
988: }
1.35 itojun 989: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 990: /* XXX stat */
991: icmp6_error(m, ICMP6_PARAM_PROB,
992: ICMP6_PARAMPROB_HEADER,
993: erroff + opt + 1 - opthead);
994: return (-1);
1.35 itojun 995: }
1.22 itojun 996: optlen = IP6OPT_JUMBO_LEN;
997:
998: /*
999: * IPv6 packets that have non 0 payload length
1.35 itojun 1000: * must not contain a jumbo payload option.
1.22 itojun 1001: */
1002: ip6 = mtod(m, struct ip6_hdr *);
1003: if (ip6->ip6_plen) {
1004: ip6stat.ip6s_badoptions++;
1005: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1006: ICMP6_PARAMPROB_HEADER,
1007: erroff + opt - opthead);
1008: return (-1);
1.22 itojun 1009: }
1.2 itojun 1010:
1.22 itojun 1011: /*
1012: * We may see jumbolen in unaligned location, so
1013: * we'd need to perform bcopy().
1014: */
1015: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
1016: jumboplen = (u_int32_t)htonl(jumboplen);
1017:
1018: #if 1
1019: /*
1020: * if there are multiple jumbo payload options,
1021: * *plenp will be non-zero and the packet will be
1022: * rejected.
1023: * the behavior may need some debate in ipngwg -
1024: * multiple options does not make sense, however,
1025: * there's no explicit mention in specification.
1026: */
1027: if (*plenp != 0) {
1028: ip6stat.ip6s_badoptions++;
1029: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1030: ICMP6_PARAMPROB_HEADER,
1031: erroff + opt + 2 - opthead);
1032: return (-1);
1.22 itojun 1033: }
1.8 itojun 1034: #endif
1.2 itojun 1035:
1.22 itojun 1036: /*
1037: * jumbo payload length must be larger than 65535.
1038: */
1039: if (jumboplen <= IPV6_MAXPACKET) {
1040: ip6stat.ip6s_badoptions++;
1041: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1042: ICMP6_PARAMPROB_HEADER,
1043: erroff + opt + 2 - opthead);
1044: return (-1);
1.22 itojun 1045: }
1046: *plenp = jumboplen;
1047:
1048: break;
1.35 itojun 1049: default: /* unknown option */
1050: if (hbhlen < IP6OPT_MINLEN) {
1051: ip6stat.ip6s_toosmall++;
1052: goto bad;
1053: }
1.55 itojun 1054: optlen = ip6_unknown_opt(opt, m,
1055: erroff + opt - opthead);
1056: if (optlen == -1)
1057: return (-1);
1.35 itojun 1058: optlen += 2;
1059: break;
1.2 itojun 1060: }
1061: }
1062:
1.55 itojun 1063: return (0);
1.2 itojun 1064:
1065: bad:
1066: m_freem(m);
1.55 itojun 1067: return (-1);
1.2 itojun 1068: }
1069:
1070: /*
1071: * Unknown option processing.
1072: * The third argument `off' is the offset from the IPv6 header to the option,
1073: * which is necessary if the IPv6 header the and option header and IPv6 header
1074: * is not continuous in order to return an ICMPv6 error.
1075: */
1076: int
1.107 christos 1077: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1078: {
1079: struct ip6_hdr *ip6;
1080:
1.35 itojun 1081: switch (IP6OPT_TYPE(*optp)) {
1082: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1083: return ((int)*(optp + 1));
1.35 itojun 1084: case IP6OPT_TYPE_DISCARD: /* silently discard */
1085: m_freem(m);
1.58 itojun 1086: return (-1);
1.35 itojun 1087: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1088: ip6stat.ip6s_badoptions++;
1089: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1090: return (-1);
1.35 itojun 1091: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1092: ip6stat.ip6s_badoptions++;
1093: ip6 = mtod(m, struct ip6_hdr *);
1094: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1095: (m->m_flags & (M_BCAST|M_MCAST)))
1096: m_freem(m);
1097: else
1098: icmp6_error(m, ICMP6_PARAM_PROB,
1099: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1100: return (-1);
1.2 itojun 1101: }
1102:
1103: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1104: return (-1);
1.2 itojun 1105: }
1106:
1107: /*
1.9 itojun 1108: * Create the "control" list for this pcb.
1109: *
1110: * The routine will be called from upper layer handlers like tcp6_input().
1111: * Thus the routine assumes that the caller (tcp6_input) have already
1112: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1113: * very first mbuf on the mbuf chain.
1114: * We may want to add some infinite loop prevention or sanity checks for safety.
1115: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1116: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1117: */
1118: void
1.107 christos 1119: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1120: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1121: {
1.85 rpaulo 1122: #ifdef RFC2292
1123: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1124: #else
1125: #define IS2292(x, y) (y)
1126: #endif
1127:
1.9 itojun 1128: #ifdef SO_TIMESTAMP
1.2 itojun 1129: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1130: struct timeval tv;
1131:
1132: microtime(&tv);
1.97 christos 1133: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1134: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1135: if (*mp)
1136: mp = &(*mp)->m_next;
1137: }
1.9 itojun 1138: #endif
1.87 rpaulo 1139:
1140: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1141: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1142: return;
1143:
1.2 itojun 1144: /* RFC 2292 sec. 5 */
1.35 itojun 1145: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1146: struct in6_pktinfo pi6;
1.85 rpaulo 1147:
1.2 itojun 1148: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1149: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1150: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1151: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1152: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1153: sizeof(struct in6_pktinfo),
1154: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1155: if (*mp)
1156: mp = &(*mp)->m_next;
1157: }
1.85 rpaulo 1158:
1.2 itojun 1159: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1160: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1161:
1.97 christos 1162: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1163: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1164: if (*mp)
1165: mp = &(*mp)->m_next;
1166: }
1167:
1168: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1169: u_int32_t flowinfo;
1170: int tclass;
1171:
1172: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1173: flowinfo >>= 20;
1174:
1175: tclass = flowinfo & 0xff;
1.97 christos 1176: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1177: IPV6_TCLASS, IPPROTO_IPV6);
1178:
1.2 itojun 1179: if (*mp)
1180: mp = &(*mp)->m_next;
1181: }
1182:
1183: /*
1.75 itojun 1184: * IPV6_HOPOPTS socket option. Recall that we required super-user
1185: * privilege for the option (see ip6_ctloutput), but it might be too
1186: * strict, since there might be some hop-by-hop options which can be
1187: * returned to normal user.
1.85 rpaulo 1188: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1189: */
1.75 itojun 1190: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1191: /*
1192: * Check if a hop-by-hop options header is contatined in the
1193: * received packet, and if so, store the options as ancillary
1194: * data. Note that a hop-by-hop options header must be
1195: * just after the IPv6 header, which fact is assured through
1196: * the IPv6 input processing.
1197: */
1.78 christos 1198: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1199: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1200: struct ip6_hbh *hbh;
1201: int hbhlen;
1.62 itojun 1202: struct mbuf *ext;
1.9 itojun 1203:
1.62 itojun 1204: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1205: xip6->ip6_nxt);
1.62 itojun 1206: if (ext == NULL) {
1.9 itojun 1207: ip6stat.ip6s_tooshort++;
1208: return;
1209: }
1.62 itojun 1210: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1211: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1212: if (hbhlen != ext->m_len) {
1213: m_freem(ext);
1.9 itojun 1214: ip6stat.ip6s_tooshort++;
1215: return;
1216: }
1.2 itojun 1217:
1218: /*
1219: * XXX: We copy whole the header even if a jumbo
1220: * payload option is included, which option is to
1221: * be removed before returning in the RFC 2292.
1.85 rpaulo 1222: * Note: this constraint is removed in RFC3542.
1.2 itojun 1223: */
1.97 christos 1224: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1225: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1226: IPPROTO_IPV6);
1.2 itojun 1227: if (*mp)
1228: mp = &(*mp)->m_next;
1.62 itojun 1229: m_freem(ext);
1.2 itojun 1230: }
1231: }
1232:
1233: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1234: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1235: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1236: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1237:
1238: /*
1239: * Search for destination options headers or routing
1240: * header(s) through the header chain, and stores each
1241: * header as ancillary data.
1242: * Note that the order of the headers remains in
1243: * the chain of ancillary data.
1244: */
1.86 rpaulo 1245: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1246: struct ip6_ext *ip6e = NULL;
1.9 itojun 1247: int elen;
1.62 itojun 1248: struct mbuf *ext = NULL;
1.9 itojun 1249:
1.62 itojun 1250: /*
1251: * if it is not an extension header, don't try to
1252: * pull it from the chain.
1253: */
1254: switch (nxt) {
1255: case IPPROTO_DSTOPTS:
1256: case IPPROTO_ROUTING:
1257: case IPPROTO_HOPOPTS:
1258: case IPPROTO_AH: /* is it possible? */
1259: break;
1260: default:
1261: goto loopend;
1262: }
1263:
1264: ext = ip6_pullexthdr(m, off, nxt);
1265: if (ext == NULL) {
1.9 itojun 1266: ip6stat.ip6s_tooshort++;
1267: return;
1268: }
1.62 itojun 1269: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1270: if (nxt == IPPROTO_AH)
1271: elen = (ip6e->ip6e_len + 2) << 2;
1272: else
1273: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1274: if (elen != ext->m_len) {
1275: m_freem(ext);
1.9 itojun 1276: ip6stat.ip6s_tooshort++;
1277: return;
1278: }
1.57 thorpej 1279: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1280:
1.35 itojun 1281: switch (nxt) {
1.62 itojun 1282: case IPPROTO_DSTOPTS:
1.35 itojun 1283: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1284: break;
1285:
1.97 christos 1286: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1287: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1288: IPPROTO_IPV6);
1.35 itojun 1289: if (*mp)
1290: mp = &(*mp)->m_next;
1291: break;
1292:
1293: case IPPROTO_ROUTING:
1294: if (!in6p->in6p_flags & IN6P_RTHDR)
1295: break;
1296:
1.97 christos 1297: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1298: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1299: IPPROTO_IPV6);
1.35 itojun 1300: if (*mp)
1301: mp = &(*mp)->m_next;
1302: break;
1303:
1.62 itojun 1304: case IPPROTO_HOPOPTS:
1305: case IPPROTO_AH: /* is it possible? */
1306: break;
1307:
1.35 itojun 1308: default:
1309: /*
1.62 itojun 1310: * other cases have been filtered in the above.
1311: * none will visit this case. here we supply
1312: * the code just in case (nxt overwritten or
1313: * other cases).
1.35 itojun 1314: */
1.62 itojun 1315: m_freem(ext);
1.35 itojun 1316: goto loopend;
1317:
1.2 itojun 1318: }
1319:
1320: /* proceed with the next header. */
1.9 itojun 1321: off += elen;
1.2 itojun 1322: nxt = ip6e->ip6e_nxt;
1.62 itojun 1323: ip6e = NULL;
1324: m_freem(ext);
1325: ext = NULL;
1.2 itojun 1326: }
1327: loopend:
1.62 itojun 1328: ;
1.2 itojun 1329: }
1.62 itojun 1330: }
1.85 rpaulo 1331: #undef IS2292
1332:
1333:
1334: void
1.95 dyoung 1335: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1336: uint32_t *mtu)
1.85 rpaulo 1337: {
1338: struct socket *so;
1339: struct mbuf *m_mtu;
1340: struct ip6_mtuinfo mtuctl;
1341:
1342: so = in6p->in6p_socket;
1343:
1344: if (mtu == NULL)
1345: return;
1346:
1347: #ifdef DIAGNOSTIC
1348: if (so == NULL) /* I believe this is impossible */
1349: panic("ip6_notify_pmtu: socket is NULL");
1350: #endif
1351:
1352: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1353: mtuctl.ip6m_mtu = *mtu;
1354: mtuctl.ip6m_addr = *dst;
1355: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1356: return;
1357:
1.97 christos 1358: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1359: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1360: return;
1361:
1.95 dyoung 1362: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1363: == 0) {
1364: m_freem(m_mtu);
1365: /* XXX: should count statistics */
1366: } else
1367: sorwakeup(so);
1368:
1369: return;
1370: }
1.62 itojun 1371:
1372: /*
1373: * pull single extension header from mbuf chain. returns single mbuf that
1374: * contains the result, or NULL on error.
1375: */
1376: static struct mbuf *
1.107 christos 1377: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1378: {
1379: struct ip6_ext ip6e;
1380: size_t elen;
1381: struct mbuf *n;
1382:
1383: #ifdef DIAGNOSTIC
1384: switch (nxt) {
1385: case IPPROTO_DSTOPTS:
1386: case IPPROTO_ROUTING:
1387: case IPPROTO_HOPOPTS:
1388: case IPPROTO_AH: /* is it possible? */
1389: break;
1390: default:
1391: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1392: }
1.62 itojun 1393: #endif
1.2 itojun 1394:
1.97 christos 1395: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1396: if (nxt == IPPROTO_AH)
1397: elen = (ip6e.ip6e_len + 2) << 2;
1398: else
1399: elen = (ip6e.ip6e_len + 1) << 3;
1400:
1401: MGET(n, M_DONTWAIT, MT_DATA);
1402: if (n && elen >= MLEN) {
1403: MCLGET(n, M_DONTWAIT);
1404: if ((n->m_flags & M_EXT) == 0) {
1405: m_free(n);
1406: n = NULL;
1407: }
1408: }
1409: if (!n)
1410: return NULL;
1411:
1412: n->m_len = 0;
1413: if (elen >= M_TRAILINGSPACE(n)) {
1414: m_free(n);
1415: return NULL;
1416: }
1417:
1.97 christos 1418: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1419: n->m_len = elen;
1420: return n;
1.2 itojun 1421: }
1422:
1423: /*
1424: * Get pointer to the previous header followed by the header
1425: * currently processed.
1426: * XXX: This function supposes that
1427: * M includes all headers,
1428: * the next header field and the header length field of each header
1429: * are valid, and
1430: * the sum of each header length equals to OFF.
1431: * Because of these assumptions, this function must be called very
1432: * carefully. Moreover, it will not be used in the near future when
1433: * we develop `neater' mechanism to process extension headers.
1434: */
1.58 itojun 1435: u_int8_t *
1.107 christos 1436: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1437: {
1438: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1439:
1440: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1441: return (&ip6->ip6_nxt);
1.2 itojun 1442: else {
1443: int len, nxt;
1444: struct ip6_ext *ip6e = NULL;
1445:
1446: nxt = ip6->ip6_nxt;
1447: len = sizeof(struct ip6_hdr);
1448: while (len < off) {
1.97 christos 1449: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1450:
1.35 itojun 1451: switch (nxt) {
1.2 itojun 1452: case IPPROTO_FRAGMENT:
1453: len += sizeof(struct ip6_frag);
1454: break;
1455: case IPPROTO_AH:
1456: len += (ip6e->ip6e_len + 2) << 2;
1457: break;
1458: default:
1459: len += (ip6e->ip6e_len + 1) << 3;
1460: break;
1461: }
1462: nxt = ip6e->ip6e_nxt;
1463: }
1464: if (ip6e)
1.58 itojun 1465: return (&ip6e->ip6e_nxt);
1.2 itojun 1466: else
1467: return NULL;
1.18 itojun 1468: }
1469: }
1470:
1471: /*
1472: * get next header offset. m will be retained.
1473: */
1474: int
1.107 christos 1475: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1476: {
1477: struct ip6_hdr ip6;
1478: struct ip6_ext ip6e;
1479: struct ip6_frag fh;
1480:
1481: /* just in case */
1482: if (m == NULL)
1483: panic("ip6_nexthdr: m == NULL");
1484: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1485: return -1;
1486:
1487: switch (proto) {
1488: case IPPROTO_IPV6:
1.83 rpaulo 1489: /* do not chase beyond intermediate IPv6 headers */
1490: if (off != 0)
1491: return -1;
1.18 itojun 1492: if (m->m_pkthdr.len < off + sizeof(ip6))
1493: return -1;
1.97 christos 1494: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1495: if (nxtp)
1496: *nxtp = ip6.ip6_nxt;
1497: off += sizeof(ip6);
1498: return off;
1499:
1500: case IPPROTO_FRAGMENT:
1501: /*
1502: * terminate parsing if it is not the first fragment,
1503: * it does not make sense to parse through it.
1504: */
1505: if (m->m_pkthdr.len < off + sizeof(fh))
1506: return -1;
1.97 christos 1507: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1508: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1509: return -1;
1510: if (nxtp)
1511: *nxtp = fh.ip6f_nxt;
1512: off += sizeof(struct ip6_frag);
1513: return off;
1514:
1515: case IPPROTO_AH:
1516: if (m->m_pkthdr.len < off + sizeof(ip6e))
1517: return -1;
1.97 christos 1518: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1519: if (nxtp)
1520: *nxtp = ip6e.ip6e_nxt;
1521: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1522: if (m->m_pkthdr.len < off)
1523: return -1;
1.18 itojun 1524: return off;
1525:
1526: case IPPROTO_HOPOPTS:
1527: case IPPROTO_ROUTING:
1528: case IPPROTO_DSTOPTS:
1529: if (m->m_pkthdr.len < off + sizeof(ip6e))
1530: return -1;
1.97 christos 1531: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1532: if (nxtp)
1533: *nxtp = ip6e.ip6e_nxt;
1534: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1535: if (m->m_pkthdr.len < off)
1536: return -1;
1.18 itojun 1537: return off;
1538:
1539: case IPPROTO_NONE:
1540: case IPPROTO_ESP:
1541: case IPPROTO_IPCOMP:
1542: /* give up */
1543: return -1;
1544:
1545: default:
1546: return -1;
1547: }
1548: }
1549:
1550: /*
1551: * get offset for the last header in the chain. m will be kept untainted.
1552: */
1553: int
1.107 christos 1554: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1555: {
1556: int newoff;
1557: int nxt;
1558:
1559: if (!nxtp) {
1560: nxt = -1;
1561: nxtp = &nxt;
1562: }
1.86 rpaulo 1563: for (;;) {
1.18 itojun 1564: newoff = ip6_nexthdr(m, off, proto, nxtp);
1565: if (newoff < 0)
1566: return off;
1567: else if (newoff < off)
1568: return -1; /* invalid */
1569: else if (newoff == off)
1570: return newoff;
1571:
1572: off = newoff;
1573: proto = *nxtp;
1.2 itojun 1574: }
1575: }
1576:
1.81 rpaulo 1577: struct m_tag *
1.107 christos 1578: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1579: {
1580: struct m_tag *mtag;
1581:
1582: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1583: if (!mtag) {
1584: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1585: M_NOWAIT);
1586: if (mtag) {
1587: m_tag_prepend(m, mtag);
1588: bzero(mtag + 1, sizeof(struct ip6aux));
1589: }
1590: }
1591: return mtag;
1592: }
1593:
1594: struct m_tag *
1.107 christos 1595: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1596: {
1597: struct m_tag *mtag;
1598:
1599: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1600: return mtag;
1601: }
1602:
1603: void
1.107 christos 1604: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1605: {
1606: struct m_tag *mtag;
1607:
1608: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1609: if (mtag)
1610: m_tag_delete(m, mtag);
1611: }
1612:
1.98 liamjfoy 1613: #ifdef GATEWAY
1614: /*
1615: * sysctl helper routine for net.inet.ip6.maxflows. Since
1616: * we could reduce this value, call ip6flow_reap();
1617: */
1618: static int
1.101 liamjfoy 1619: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1620: {
1621: int s;
1622:
1623: s = sysctl_lookup(SYSCTLFN_CALL(rnode));
1.100 liamjfoy 1624: if (s || newp == NULL)
1.98 liamjfoy 1625: return (s);
1626:
1627: s = splsoftnet();
1628: ip6flow_reap(0);
1629: splx(s);
1630:
1631: return (0);
1632: }
1.99 liamjfoy 1633:
1634: static int
1635: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1636: {
1637: int error, tmp;
1638: struct sysctlnode node;
1639:
1640: node = *rnode;
1641: tmp = ip6_hashsize;
1642: node.sysctl_data = &tmp;
1643: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1644: if (error || newp == NULL)
1645: return (error);
1646:
1647: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1648: /*
1649: * Can only fail due to malloc()
1650: */
1651: if (ip6flow_invalidate_all(tmp))
1652: return ENOMEM;
1653: } else {
1654: /*
1655: * EINVAL if not a power of 2
1656: */
1657: return EINVAL;
1658: }
1659:
1660: return (0);
1661: }
1.98 liamjfoy 1662: #endif /* GATEWAY */
1663:
1.2 itojun 1664: /*
1665: * System control for IP6
1666: */
1667:
1668: u_char inet6ctlerrmap[PRC_NCMDS] = {
1669: 0, 0, 0, 0,
1670: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1671: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1672: EMSGSIZE, EHOSTUNREACH, 0, 0,
1673: 0, 0, 0, 0,
1674: ENOPROTOOPT
1675: };
1676:
1.70 atatat 1677: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1678: {
1.85 rpaulo 1679: #ifdef RFC2292
1680: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1681: #else
1682: #define IS2292(x, y) (y)
1683: #endif
1.26 itojun 1684:
1.73 atatat 1685: sysctl_createv(clog, 0, NULL, NULL,
1686: CTLFLAG_PERMANENT,
1.70 atatat 1687: CTLTYPE_NODE, "net", NULL,
1688: NULL, 0, NULL, 0,
1689: CTL_NET, CTL_EOL);
1.73 atatat 1690: sysctl_createv(clog, 0, NULL, NULL,
1691: CTLFLAG_PERMANENT,
1.74 atatat 1692: CTLTYPE_NODE, "inet6",
1693: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1694: NULL, 0, NULL, 0,
1695: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1696: sysctl_createv(clog, 0, NULL, NULL,
1697: CTLFLAG_PERMANENT,
1.74 atatat 1698: CTLTYPE_NODE, "ip6",
1699: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1700: NULL, 0, NULL, 0,
1701: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1702:
1.73 atatat 1703: sysctl_createv(clog, 0, NULL, NULL,
1704: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1705: CTLTYPE_INT, "forwarding",
1706: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1707: NULL, 0, &ip6_forwarding, 0,
1708: CTL_NET, PF_INET6, IPPROTO_IPV6,
1709: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1710: sysctl_createv(clog, 0, NULL, NULL,
1711: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1712: CTLTYPE_INT, "redirect",
1713: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1714: NULL, 0, &ip6_sendredirects, 0,
1715: CTL_NET, PF_INET6, IPPROTO_IPV6,
1716: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1717: sysctl_createv(clog, 0, NULL, NULL,
1718: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1719: CTLTYPE_INT, "hlim",
1720: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1721: NULL, 0, &ip6_defhlim, 0,
1722: CTL_NET, PF_INET6, IPPROTO_IPV6,
1723: IPV6CTL_DEFHLIM, CTL_EOL);
1724: #ifdef notyet
1.73 atatat 1725: sysctl_createv(clog, 0, NULL, NULL,
1726: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1727: CTLTYPE_INT, "mtu", NULL,
1728: NULL, 0, &, 0,
1729: CTL_NET, PF_INET6, IPPROTO_IPV6,
1730: IPV6CTL_DEFMTU, CTL_EOL);
1731: #endif
1732: #ifdef __no_idea__
1.73 atatat 1733: sysctl_createv(clog, 0, NULL, NULL,
1734: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1735: CTLTYPE_INT, "forwsrcrt", NULL,
1736: NULL, 0, &?, 0,
1737: CTL_NET, PF_INET6, IPPROTO_IPV6,
1738: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1739: sysctl_createv(clog, 0, NULL, NULL,
1740: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1741: CTLTYPE_STRUCT, "mrtstats", NULL,
1742: NULL, 0, &?, sizeof(?),
1743: CTL_NET, PF_INET6, IPPROTO_IPV6,
1744: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1745: sysctl_createv(clog, 0, NULL, NULL,
1746: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1747: CTLTYPE_?, "mrtproto", NULL,
1748: NULL, 0, &?, sizeof(?),
1749: CTL_NET, PF_INET6, IPPROTO_IPV6,
1750: IPV6CTL_MRTPROTO, CTL_EOL);
1751: #endif
1.73 atatat 1752: sysctl_createv(clog, 0, NULL, NULL,
1753: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1754: CTLTYPE_INT, "maxfragpackets",
1755: SYSCTL_DESCR("Maximum number of fragments to buffer "
1756: "for reassembly"),
1.70 atatat 1757: NULL, 0, &ip6_maxfragpackets, 0,
1758: CTL_NET, PF_INET6, IPPROTO_IPV6,
1759: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1760: #ifdef __no_idea__
1.73 atatat 1761: sysctl_createv(clog, 0, NULL, NULL,
1762: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1763: CTLTYPE_INT, "sourcecheck", NULL,
1764: NULL, 0, &?, 0,
1765: CTL_NET, PF_INET6, IPPROTO_IPV6,
1766: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1767: sysctl_createv(clog, 0, NULL, NULL,
1768: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1769: CTLTYPE_INT, "sourcecheck_logint", NULL,
1770: NULL, 0, &?, 0,
1771: CTL_NET, PF_INET6, IPPROTO_IPV6,
1772: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1773: #endif
1.73 atatat 1774: sysctl_createv(clog, 0, NULL, NULL,
1775: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1776: CTLTYPE_INT, "accept_rtadv",
1777: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1778: NULL, 0, &ip6_accept_rtadv, 0,
1779: CTL_NET, PF_INET6, IPPROTO_IPV6,
1780: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1781: sysctl_createv(clog, 0, NULL, NULL,
1782: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1783: CTLTYPE_INT, "keepfaith",
1784: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1785: NULL, 0, &ip6_keepfaith, 0,
1786: CTL_NET, PF_INET6, IPPROTO_IPV6,
1787: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1788: sysctl_createv(clog, 0, NULL, NULL,
1789: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1790: CTLTYPE_INT, "log_interval",
1791: SYSCTL_DESCR("Minumum interval between logging "
1792: "unroutable packets"),
1.70 atatat 1793: NULL, 0, &ip6_log_interval, 0,
1794: CTL_NET, PF_INET6, IPPROTO_IPV6,
1795: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1796: sysctl_createv(clog, 0, NULL, NULL,
1797: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1798: CTLTYPE_INT, "hdrnestlimit",
1799: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1800: NULL, 0, &ip6_hdrnestlimit, 0,
1801: CTL_NET, PF_INET6, IPPROTO_IPV6,
1802: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1803: sysctl_createv(clog, 0, NULL, NULL,
1804: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1805: CTLTYPE_INT, "dad_count",
1806: SYSCTL_DESCR("Number of Duplicate Address Detection "
1807: "probes to send"),
1.70 atatat 1808: NULL, 0, &ip6_dad_count, 0,
1809: CTL_NET, PF_INET6, IPPROTO_IPV6,
1810: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1811: sysctl_createv(clog, 0, NULL, NULL,
1812: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1813: CTLTYPE_INT, "auto_flowlabel",
1814: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1815: NULL, 0, &ip6_auto_flowlabel, 0,
1816: CTL_NET, PF_INET6, IPPROTO_IPV6,
1817: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1818: sysctl_createv(clog, 0, NULL, NULL,
1819: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1820: CTLTYPE_INT, "defmcasthlim",
1821: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1822: NULL, 0, &ip6_defmcasthlim, 0,
1823: CTL_NET, PF_INET6, IPPROTO_IPV6,
1824: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1825: #if NGIF > 0
1.73 atatat 1826: sysctl_createv(clog, 0, NULL, NULL,
1827: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1828: CTLTYPE_INT, "gifhlim",
1829: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1830: NULL, 0, &ip6_gif_hlim, 0,
1831: CTL_NET, PF_INET6, IPPROTO_IPV6,
1832: IPV6CTL_GIF_HLIM, CTL_EOL);
1833: #endif /* NGIF */
1.73 atatat 1834: sysctl_createv(clog, 0, NULL, NULL,
1835: CTLFLAG_PERMANENT,
1.74 atatat 1836: CTLTYPE_STRING, "kame_version",
1837: SYSCTL_DESCR("KAME Version"),
1.78 christos 1838: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1839: CTL_NET, PF_INET6, IPPROTO_IPV6,
1840: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1841: sysctl_createv(clog, 0, NULL, NULL,
1842: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1843: CTLTYPE_INT, "use_deprecated",
1844: SYSCTL_DESCR("Allow use of deprecated addresses as "
1845: "source addresses"),
1.70 atatat 1846: NULL, 0, &ip6_use_deprecated, 0,
1847: CTL_NET, PF_INET6, IPPROTO_IPV6,
1848: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1849: sysctl_createv(clog, 0, NULL, NULL,
1850: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1851: CTLTYPE_INT, "rr_prune", NULL,
1852: NULL, 0, &ip6_rr_prune, 0,
1853: CTL_NET, PF_INET6, IPPROTO_IPV6,
1854: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1855: sysctl_createv(clog, 0, NULL, NULL,
1856: CTLFLAG_PERMANENT
1.70 atatat 1857: #ifndef INET6_BINDV6ONLY
1.73 atatat 1858: |CTLFLAG_READWRITE,
1.70 atatat 1859: #endif
1.74 atatat 1860: CTLTYPE_INT, "v6only",
1861: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1862: "to PF_INET sockets"),
1.70 atatat 1863: NULL, 0, &ip6_v6only, 0,
1864: CTL_NET, PF_INET6, IPPROTO_IPV6,
1865: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1866: sysctl_createv(clog, 0, NULL, NULL,
1867: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1868: CTLTYPE_INT, "anonportmin",
1869: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1870: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1871: CTL_NET, PF_INET6, IPPROTO_IPV6,
1872: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1873: sysctl_createv(clog, 0, NULL, NULL,
1874: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1875: CTLTYPE_INT, "anonportmax",
1876: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1877: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1878: CTL_NET, PF_INET6, IPPROTO_IPV6,
1879: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1880: #ifndef IPNOPRIVPORTS
1.73 atatat 1881: sysctl_createv(clog, 0, NULL, NULL,
1882: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1883: CTLTYPE_INT, "lowportmin",
1884: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1885: "to assign"),
1.70 atatat 1886: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1887: CTL_NET, PF_INET6, IPPROTO_IPV6,
1888: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1889: sysctl_createv(clog, 0, NULL, NULL,
1890: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1891: CTLTYPE_INT, "lowportmax",
1892: SYSCTL_DESCR("Highest privileged ephemeral port number "
1893: "to assign"),
1.70 atatat 1894: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1895: CTL_NET, PF_INET6, IPPROTO_IPV6,
1896: IPV6CTL_LOWPORTMAX, CTL_EOL);
1897: #endif /* IPNOPRIVPORTS */
1.73 atatat 1898: sysctl_createv(clog, 0, NULL, NULL,
1899: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1900: CTLTYPE_INT, "use_tempaddr",
1901: SYSCTL_DESCR("Use temporary address"),
1902: NULL, 0, &ip6_use_tempaddr, 0,
1903: CTL_NET, PF_INET6, IPPROTO_IPV6,
1904: CTL_CREATE, CTL_EOL);
1905: sysctl_createv(clog, 0, NULL, NULL,
1906: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1907: CTLTYPE_INT, "temppltime",
1908: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1909: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1910: CTL_NET, PF_INET6, IPPROTO_IPV6,
1911: CTL_CREATE, CTL_EOL);
1912: sysctl_createv(clog, 0, NULL, NULL,
1913: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1914: CTLTYPE_INT, "tempvltime",
1915: SYSCTL_DESCR("valid lifetime of a temporary address"),
1916: NULL, 0, &ip6_temp_valid_lifetime, 0,
1917: CTL_NET, PF_INET6, IPPROTO_IPV6,
1918: CTL_CREATE, CTL_EOL);
1919: sysctl_createv(clog, 0, NULL, NULL,
1920: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1921: CTLTYPE_INT, "maxfrags",
1922: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1923: NULL, 0, &ip6_maxfrags, 0,
1924: CTL_NET, PF_INET6, IPPROTO_IPV6,
1925: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1926: sysctl_createv(clog, 0, NULL, NULL,
1927: CTLFLAG_PERMANENT,
1928: CTLTYPE_STRUCT, "stats",
1929: SYSCTL_DESCR("IPv6 statistics"),
1930: NULL, 0, &ip6stat, sizeof(ip6stat),
1931: CTL_NET, PF_INET6, IPPROTO_IPV6,
1932: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1933: sysctl_createv(clog, 0, NULL, NULL,
1934: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1935: CTLTYPE_INT, "use_defaultzone",
1936: SYSCTL_DESCR("Whether to use the default scope zones"),
1937: NULL, 0, &ip6_use_defzone, 0,
1938: CTL_NET, PF_INET6, IPPROTO_IPV6,
1939: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1940: sysctl_createv(clog, 0, NULL, NULL,
1941: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1942: CTLTYPE_INT, "mcast_pmtu",
1943: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1944: NULL, 0, &ip6_mcast_pmtu, 0,
1945: CTL_NET, PF_INET6, IPPROTO_IPV6,
1946: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1947: #ifdef GATEWAY
1948: sysctl_createv(clog, 0, NULL, NULL,
1949: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1950: CTLTYPE_INT, "maxflows",
1951: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.101 liamjfoy 1952: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1953: CTL_NET, PF_INET6, IPPROTO_IPV6,
1954: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1955: sysctl_createv(clog, 0, NULL, NULL,
1956: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1957: CTLTYPE_INT, "hashsize",
1958: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1959: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1960: CTL_NET, PF_INET6, IPPROTO_IPV6,
1961: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1962: #endif
1.2 itojun 1963: }
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