Annotation of src/sys/netinet6/ip6_input.c, Revision 1.104
1.104 ! yamt 1: /* $NetBSD$ */
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>
1.104 ! yamt 65: __KERNEL_RCSID(0, "$NetBSD$");
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:
1.83 rpaulo 139: extern struct callout in6_tmpaddrtimer_ch;
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:
151: static void ip6_init2 __P((void *));
1.81 rpaulo 152: static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *));
1.2 itojun 153:
1.5 itojun 154: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
1.62 itojun 155: static struct mbuf *ip6_pullexthdr __P((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 */
1.19 thorpej 205: callout_init(&nd6_timer_ch);
206: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83 rpaulo 207:
208: /* timer for regeneranation of temporary addresses randomize ID */
209: callout_init(&in6_tmpaddrtimer_ch);
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;
1.2 itojun 246: int off = sizeof(struct ip6_hdr), nest;
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;
1.103 dyoung 252: const struct sockaddr_in6 *cdst;
1.94 degroote 253: #ifdef FAST_IPSEC
254: struct m_tag *mtag;
255: struct tdb_ident *tdbi;
256: struct secpolicy *sp;
257: int s, error;
258: #endif
1.2 itojun 259:
260: #ifdef IPSEC
261: /*
262: * should the inner packet be considered authentic?
263: * see comment in ah4_input().
264: */
1.49 itojun 265: m->m_flags &= ~M_AUTHIPHDR;
266: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 267: #endif
1.9 itojun 268:
1.2 itojun 269: /*
1.81 rpaulo 270: * make sure we don't have onion peering information into m_tag.
271: */
272: ip6_delaux(m);
273:
274: /*
1.44 itojun 275: * mbuf statistics
1.2 itojun 276: */
277: if (m->m_flags & M_EXT) {
278: if (m->m_next)
279: ip6stat.ip6s_mext2m++;
280: else
281: ip6stat.ip6s_mext1++;
282: } else {
1.96 dyoung 283: #define M2MMAX __arraycount(ip6stat.ip6s_m2m)
1.2 itojun 284: if (m->m_next) {
1.9 itojun 285: if (m->m_flags & M_LOOP) {
1.77 peter 286: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 287: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 288: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
289: else
290: ip6stat.ip6s_m2m[0]++;
291: } else
292: ip6stat.ip6s_m1++;
1.40 itojun 293: #undef M2MMAX
1.2 itojun 294: }
295:
1.9 itojun 296: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
297: ip6stat.ip6s_total++;
298:
1.57 thorpej 299: /*
300: * If the IPv6 header is not aligned, slurp it up into a new
301: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 302: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 303: * IPv6 header is in the first mbuf of the chain.
304: */
1.97 christos 305: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 306: struct ifnet *inifp = m->m_pkthdr.rcvif;
307: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
308: (max_linkhdr + 3) & ~3)) == NULL) {
309: /* XXXJRT new stat, please */
310: ip6stat.ip6s_toosmall++;
311: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
312: return;
313: }
314: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
315: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 316: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 317: ip6stat.ip6s_toosmall++;
318: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
319: return;
320: }
1.2 itojun 321: }
322:
323: ip6 = mtod(m, struct ip6_hdr *);
324:
325: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
326: ip6stat.ip6s_badvers++;
1.9 itojun 327: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 328: goto bad;
329: }
1.15 darrenr 330:
1.98 liamjfoy 331: #if defined(IPSEC)
332: /* IPv6 fast forwarding is not compatible with IPsec. */
333: m->m_flags &= ~M_CANFASTFWD;
334: #else
335: /*
336: * Assume that we can create a fast-forward IP flow entry
337: * based on this packet.
338: */
339: m->m_flags |= M_CANFASTFWD;
340: #endif
341:
1.15 darrenr 342: #ifdef PFIL_HOOKS
343: /*
344: * Run through list of hooks for input packets. If there are any
345: * filters which require that additional packets in the flow are
346: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
347: * Note that filters must _never_ set this flag, as another filter
348: * in the list may have previously cleared it.
349: */
1.39 itojun 350: /*
351: * let ipfilter look at packet on the wire,
352: * not the decapsulated packet.
353: */
354: #ifdef IPSEC
1.42 itojun 355: if (!ipsec_getnhist(m))
1.94 degroote 356: #elif defined(FAST_IPSEC)
357: if (!ipsec_indone(m))
1.39 itojun 358: #else
359: if (1)
360: #endif
361: {
1.64 itojun 362: struct in6_addr odst;
363:
364: odst = ip6->ip6_dst;
1.39 itojun 365: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
366: PFIL_IN) != 0)
367: return;
368: if (m == NULL)
369: return;
370: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 371: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 372: }
1.15 darrenr 373: #endif /* PFIL_HOOKS */
374:
1.2 itojun 375: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
376:
1.30 thorpej 377: #ifdef ALTQ
378: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
379: /* packet is dropped by traffic conditioner */
380: return;
1.9 itojun 381: }
382: #endif
383:
1.2 itojun 384: /*
1.44 itojun 385: * Check against address spoofing/corruption.
1.2 itojun 386: */
387: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
388: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 389: /*
390: * XXX: "badscope" is not very suitable for a multicast source.
391: */
1.2 itojun 392: ip6stat.ip6s_badscope++;
1.9 itojun 393: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 394: goto bad;
395: }
1.13 itojun 396: /*
1.44 itojun 397: * The following check is not documented in specs. A malicious
398: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
399: * and bypass security checks (act as if it was from 127.0.0.1 by using
400: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 401: *
1.44 itojun 402: * This check chokes if we are in an SIIT cloud. As none of BSDs
403: * support IPv4-less kernel compilation, we cannot support SIIT
404: * environment at all. So, it makes more sense for us to reject any
405: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 406: * partial support for SIIT environment.
1.13 itojun 407: */
408: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
409: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
410: ip6stat.ip6s_badscope++;
411: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
412: goto bad;
413: }
1.17 itojun 414: #if 0
1.13 itojun 415: /*
1.17 itojun 416: * Reject packets with IPv4 compatible addresses (auto tunnel).
417: *
418: * The code forbids auto tunnel relay case in RFC1933 (the check is
419: * stronger than RFC1933). We may want to re-enable it if mech-xx
420: * is revised to forbid relaying case.
1.13 itojun 421: */
422: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
423: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
424: ip6stat.ip6s_badscope++;
425: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
426: goto bad;
427: }
428: #endif
1.35 itojun 429:
1.2 itojun 430: /*
1.82 yamt 431: * Disambiguate address scope zones (if there is ambiguity).
432: * We first make sure that the original source or destination address
433: * is not in our internal form for scoped addresses. Such addresses
434: * are not necessarily invalid spec-wise, but we cannot accept them due
435: * to the usage conflict.
436: * in6_setscope() then also checks and rejects the cases where src or
437: * dst are the loopback address and the receiving interface
438: * is not loopback.
439: */
1.88 bouyer 440: if (__predict_false(
441: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
442: goto bad;
443: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 444: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
445: ip6stat.ip6s_badscope++; /* XXX */
446: goto bad;
447: }
448: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
449: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
450: ip6stat.ip6s_badscope++;
451: goto bad;
452: }
453:
454: /*
1.2 itojun 455: * Multicast check
456: */
457: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
458: struct in6_multi *in6m = 0;
1.9 itojun 459:
460: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 461: /*
462: * See if we belong to the destination multicast group on the
463: * arrival interface.
464: */
465: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
466: if (in6m)
467: ours = 1;
468: else if (!ip6_mrouter) {
469: ip6stat.ip6s_notmember++;
470: ip6stat.ip6s_cantforward++;
1.9 itojun 471: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 472: goto bad;
473: }
1.9 itojun 474: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 475: goto hbhcheck;
476: }
477:
1.103 dyoung 478: cdst = satocsin6(rtcache_getdst(&ip6_forward_rt));
1.2 itojun 479: /*
480: * Unicast check
481: */
1.103 dyoung 482: if (cdst == NULL)
483: ;
484: else if (!IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &cdst->sin6_addr))
485: rtcache_free(&ip6_forward_rt);
1.93 joerg 486: else
1.103 dyoung 487: rtcache_check(&ip6_forward_rt);
1.93 joerg 488: if (ip6_forward_rt.ro_rt != NULL) {
489: /* XXX Revalidated route is accounted wrongly. */
1.25 itojun 490: ip6stat.ip6s_forward_cachehit++;
1.93 joerg 491: } else {
1.103 dyoung 492: union {
493: struct sockaddr dst;
494: struct sockaddr_in6 dst6;
495: } u;
1.35 itojun 496:
1.93 joerg 497: ip6stat.ip6s_forward_cachemiss++;
1.22 itojun 498:
1.103 dyoung 499: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
500: rtcache_setdst(&ip6_forward_rt, &u.dst);
1.2 itojun 501:
1.103 dyoung 502: rtcache_init(&ip6_forward_rt);
1.2 itojun 503: }
504:
505: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
506:
507: /*
508: * Accept the packet if the forwarding interface to the destination
509: * according to the routing table is the loopback interface,
510: * unless the associated route has a gateway.
511: * Note that this approach causes to accept a packet if there is a
512: * route to the loopback interface for the destination of the packet.
513: * But we think it's even useful in some situations, e.g. when using
514: * a special daemon which wants to intercept the packet.
515: */
1.91 dyoung 516: if (ip6_forward_rt.ro_rt != NULL &&
1.2 itojun 517: (ip6_forward_rt.ro_rt->rt_flags &
518: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55 itojun 519: !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2 itojun 520: #if 0
521: /*
522: * The check below is redundant since the comparison of
523: * the destination and the key of the rtentry has
524: * already done through looking up the routing table.
525: */
526: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55 itojun 527: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2 itojun 528: #endif
1.9 itojun 529: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 530: struct in6_ifaddr *ia6 =
531: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
532: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
533: m->m_flags |= M_ANYCAST6;
1.24 itojun 534: /*
535: * packets to a tentative, duplicated, or somehow invalid
536: * address must not be accepted.
537: */
1.2 itojun 538: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 539: /* this address is ready */
1.2 itojun 540: ours = 1;
1.9 itojun 541: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 542: goto hbhcheck;
543: } else {
1.24 itojun 544: /* address is not ready, so discard the packet. */
1.34 itojun 545: nd6log((LOG_INFO,
1.27 itojun 546: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 547: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 548: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 549:
550: goto bad;
1.2 itojun 551: }
552: }
553:
554: /*
1.55 itojun 555: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 556: */
557: #if defined(NFAITH) && 0 < NFAITH
558: if (ip6_keepfaith) {
1.91 dyoung 559: if (ip6_forward_rt.ro_rt != NULL &&
560: ip6_forward_rt.ro_rt->rt_ifp != NULL &&
1.71 itojun 561: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 562: /* XXX do we need more sanity checks? */
563: ours = 1;
1.45 itojun 564: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 565: goto hbhcheck;
566: }
567: }
568: #endif
569:
570: #if 0
571: {
572: /*
573: * Last resort: check in6_ifaddr for incoming interface.
574: * The code is here until I update the "goto ours hack" code above
575: * working right.
576: */
577: struct ifaddr *ifa;
1.91 dyoung 578: TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) {
1.9 itojun 579: if (ifa->ifa_addr == NULL)
580: continue; /* just for safety */
581: if (ifa->ifa_addr->sa_family != AF_INET6)
582: continue;
583: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
584: ours = 1;
585: deliverifp = ifa->ifa_ifp;
1.2 itojun 586: goto hbhcheck;
587: }
588: }
1.9 itojun 589: }
1.2 itojun 590: #endif
591:
592: /*
593: * Now there is no reason to process the packet if it's not our own
594: * and we're not a router.
595: */
596: if (!ip6_forwarding) {
597: ip6stat.ip6s_cantforward++;
1.9 itojun 598: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 599: goto bad;
600: }
601:
602: hbhcheck:
603: /*
1.81 rpaulo 604: * record address information into m_tag, if we don't have one yet.
605: * note that we are unable to record it, if the address is not listed
606: * as our interface address (e.g. multicast addresses, addresses
607: * within FAITH prefixes and such).
608: */
609: if (deliverifp && !ip6_getdstifaddr(m)) {
610: struct in6_ifaddr *ia6;
611:
612: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
613: if (ia6) {
614: if (!ip6_setdstifaddr(m, ia6)) {
615: /*
616: * XXX maybe we should drop the packet here,
617: * as we could not provide enough information
618: * to the upper layers.
619: */
620: }
621: }
622: }
623:
624: /*
1.2 itojun 625: * Process Hop-by-Hop options header if it's contained.
626: * m may be modified in ip6_hopopts_input().
627: * If a JumboPayload option is included, plen will also be modified.
628: */
629: plen = (u_int32_t)ntohs(ip6->ip6_plen);
630: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 631: struct ip6_hbh *hbh;
632:
633: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
634: #if 0 /*touches NULL pointer*/
635: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
636: #endif
1.2 itojun 637: return; /* m have already been freed */
1.9 itojun 638: }
1.22 itojun 639:
1.2 itojun 640: /* adjust pointer */
641: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 642:
643: /*
1.49 itojun 644: * if the payload length field is 0 and the next header field
1.22 itojun 645: * indicates Hop-by-Hop Options header, then a Jumbo Payload
646: * option MUST be included.
647: */
648: if (ip6->ip6_plen == 0 && plen == 0) {
649: /*
650: * Note that if a valid jumbo payload option is
1.83 rpaulo 651: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 652: * (non-zero) payload length to the variable plen.
1.22 itojun 653: */
654: ip6stat.ip6s_badoptions++;
655: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
656: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
657: icmp6_error(m, ICMP6_PARAM_PROB,
658: ICMP6_PARAMPROB_HEADER,
1.97 christos 659: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 660: return;
661: }
1.9 itojun 662: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
663: sizeof(struct ip6_hbh));
664: if (hbh == NULL) {
665: ip6stat.ip6s_tooshort++;
666: return;
667: }
1.57 thorpej 668: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 669: nxt = hbh->ip6h_nxt;
1.2 itojun 670:
671: /*
672: * accept the packet if a router alert option is included
673: * and we act as an IPv6 router.
674: */
1.5 itojun 675: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 676: ours = 1;
677: } else
678: nxt = ip6->ip6_nxt;
679:
680: /*
681: * Check that the amount of data in the buffers
682: * is as at least much as the IPv6 header would have us expect.
683: * Trim mbufs if longer than we expect.
684: * Drop packet if shorter than we expect.
685: */
686: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
687: ip6stat.ip6s_tooshort++;
1.9 itojun 688: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 689: goto bad;
690: }
691: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
692: if (m->m_len == m->m_pkthdr.len) {
693: m->m_len = sizeof(struct ip6_hdr) + plen;
694: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
695: } else
696: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
697: }
698:
699: /*
700: * Forward if desirable.
701: */
702: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
703: /*
704: * If we are acting as a multicast router, all
705: * incoming multicast packets are passed to the
706: * kernel-level multicast forwarding function.
707: * The packet is returned (relatively) intact; if
708: * ip6_mforward() returns a non-zero value, the packet
709: * must be discarded, else it may be accepted below.
710: */
711: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
712: ip6stat.ip6s_cantforward++;
713: m_freem(m);
714: return;
715: }
716: if (!ours) {
717: m_freem(m);
718: return;
719: }
1.22 itojun 720: } else if (!ours) {
1.64 itojun 721: ip6_forward(m, srcrt);
1.2 itojun 722: return;
1.56 itojun 723: }
1.25 itojun 724:
725: ip6 = mtod(m, struct ip6_hdr *);
726:
727: /*
728: * Malicious party may be able to use IPv4 mapped addr to confuse
729: * tcp/udp stack and bypass security checks (act as if it was from
730: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
731: *
732: * For SIIT end node behavior, you may want to disable the check.
733: * However, you will become vulnerable to attacks using IPv4 mapped
734: * source.
735: */
736: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
737: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
738: ip6stat.ip6s_badscope++;
739: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
740: goto bad;
741: }
1.2 itojun 742:
743: /*
744: * Tell launch routine the next header
745: */
1.12 itojun 746: #ifdef IFA_STATS
1.28 itojun 747: if (deliverifp != NULL) {
1.9 itojun 748: struct in6_ifaddr *ia6;
749: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
750: if (ia6)
751: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
752: }
753: #endif
1.2 itojun 754: ip6stat.ip6s_delivered++;
1.9 itojun 755: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 756: nest = 0;
1.40 itojun 757:
1.104 ! yamt 758: rh_present = 0;
1.2 itojun 759: while (nxt != IPPROTO_DONE) {
760: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
761: ip6stat.ip6s_toomanyhdr++;
1.104 ! yamt 762: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 763: goto bad;
764: }
1.8 itojun 765:
766: /*
767: * protection against faulty packet - there should be
768: * more sanity checks in header chain processing.
769: */
770: if (m->m_pkthdr.len < off) {
771: ip6stat.ip6s_tooshort++;
1.9 itojun 772: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 773: goto bad;
774: }
775:
1.104 ! yamt 776: if (nxt == IPPROTO_ROUTING) {
! 777: if (rh_present++) {
! 778: in6_ifstat_inc(m->m_pkthdr.rcvif,
! 779: ifs6_in_hdrerr);
! 780: ip6stat.ip6s_badoptions++;
! 781: goto bad;
! 782: }
! 783: }
! 784:
1.37 itojun 785: #ifdef IPSEC
786: /*
787: * enforce IPsec policy checking if we are seeing last header.
788: * note that we do not visit this with protocols with pcb layer
789: * code - like udp/tcp/raw ip.
790: */
791: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
792: ipsec6_in_reject(m, NULL)) {
793: ipsec6stat.in_polvio++;
794: goto bad;
795: }
796: #endif
1.94 degroote 797: #ifdef FAST_IPSEC
798: /*
799: * enforce IPsec policy checking if we are seeing last header.
800: * note that we do not visit this with protocols with pcb layer
801: * code - like udp/tcp/raw ip.
802: */
803: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
804: /*
805: * Check if the packet has already had IPsec processing
806: * done. If so, then just pass it along. This tag gets
807: * set during AH, ESP, etc. input handling, before the
808: * packet is returned to the ip input queue for delivery.
809: */
810: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
811: s = splsoftnet();
812: if (mtag != NULL) {
813: tdbi = (struct tdb_ident *)(mtag + 1);
814: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
815: } else {
816: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
817: IP_FORWARDING, &error);
818: }
819: if (sp != NULL) {
820: /*
821: * Check security policy against packet attributes.
822: */
823: error = ipsec_in_reject(sp, m);
824: KEY_FREESP(&sp);
825: } else {
826: /* XXX error stat??? */
827: error = EINVAL;
828: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
829: goto bad;
830: }
831: splx(s);
832: if (error)
833: goto bad;
834: }
835: #endif /* FAST_IPSEC */
836:
1.56 itojun 837:
1.2 itojun 838: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
839: }
840: return;
841: bad:
842: m_freem(m);
843: }
844:
845: /*
1.81 rpaulo 846: * set/grab in6_ifaddr correspond to IPv6 destination address.
847: */
848: static struct m_tag *
849: ip6_setdstifaddr(m, ia6)
850: struct mbuf *m;
851: struct in6_ifaddr *ia6;
852: {
853: struct m_tag *mtag;
854:
855: mtag = ip6_addaux(m);
856: if (mtag)
857: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
858: return mtag; /* NULL if failed to set */
859: }
860:
861: struct in6_ifaddr *
862: ip6_getdstifaddr(m)
863: struct mbuf *m;
864: {
865: struct m_tag *mtag;
866:
867: mtag = ip6_findaux(m);
868: if (mtag)
869: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
870: else
871: return NULL;
872: }
873:
874: /*
1.2 itojun 875: * Hop-by-Hop options header processing. If a valid jumbo payload option is
876: * included, the real payload length will be stored in plenp.
877: */
878: static int
879: ip6_hopopts_input(plenp, rtalertp, mp, offp)
880: u_int32_t *plenp;
1.5 itojun 881: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 882: struct mbuf **mp;
883: int *offp;
884: {
1.35 itojun 885: struct mbuf *m = *mp;
1.2 itojun 886: int off = *offp, hbhlen;
887: struct ip6_hbh *hbh;
888:
889: /* validation of the length of the header */
1.9 itojun 890: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
891: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
892: if (hbh == NULL) {
893: ip6stat.ip6s_tooshort++;
894: return -1;
895: }
896: hbhlen = (hbh->ip6h_len + 1) << 3;
897: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
898: hbhlen);
899: if (hbh == NULL) {
900: ip6stat.ip6s_tooshort++;
901: return -1;
902: }
1.57 thorpej 903: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 904: off += hbhlen;
905: hbhlen -= sizeof(struct ip6_hbh);
906:
907: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
908: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 909: return (-1);
1.2 itojun 910:
911: *offp = off;
912: *mp = m;
1.58 itojun 913: return (0);
1.2 itojun 914: }
915:
916: /*
917: * Search header for all Hop-by-hop options and process each option.
918: * This function is separate from ip6_hopopts_input() in order to
919: * handle a case where the sending node itself process its hop-by-hop
920: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 921: *
922: * The function assumes that hbh header is located right after the IPv6 header
923: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
924: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 925: */
926: int
927: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
928: struct mbuf *m;
929: u_int8_t *opthead;
930: int hbhlen;
1.5 itojun 931: u_int32_t *rtalertp;
1.2 itojun 932: u_int32_t *plenp;
933: {
934: struct ip6_hdr *ip6;
935: int optlen = 0;
936: u_int8_t *opt = opthead;
937: u_int16_t rtalert_val;
1.22 itojun 938: u_int32_t jumboplen;
1.55 itojun 939: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 940:
941: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 942: switch (*opt) {
943: case IP6OPT_PAD1:
944: optlen = 1;
945: break;
946: case IP6OPT_PADN:
947: if (hbhlen < IP6OPT_MINLEN) {
948: ip6stat.ip6s_toosmall++;
949: goto bad;
950: }
951: optlen = *(opt + 1) + 2;
952: break;
953: case IP6OPT_RTALERT:
954: /* XXX may need check for alignment */
955: if (hbhlen < IP6OPT_RTALERT_LEN) {
956: ip6stat.ip6s_toosmall++;
957: goto bad;
958: }
959: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 960: /* XXX stat */
961: icmp6_error(m, ICMP6_PARAM_PROB,
962: ICMP6_PARAMPROB_HEADER,
963: erroff + opt + 1 - opthead);
964: return (-1);
1.35 itojun 965: }
966: optlen = IP6OPT_RTALERT_LEN;
1.97 christos 967: bcopy((void *)(opt + 2), (void *)&rtalert_val, 2);
1.35 itojun 968: *rtalertp = ntohs(rtalert_val);
969: break;
970: case IP6OPT_JUMBO:
1.22 itojun 971: /* XXX may need check for alignment */
972: if (hbhlen < IP6OPT_JUMBO_LEN) {
973: ip6stat.ip6s_toosmall++;
974: goto bad;
975: }
1.35 itojun 976: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 977: /* XXX stat */
978: icmp6_error(m, ICMP6_PARAM_PROB,
979: ICMP6_PARAMPROB_HEADER,
980: erroff + opt + 1 - opthead);
981: return (-1);
1.35 itojun 982: }
1.22 itojun 983: optlen = IP6OPT_JUMBO_LEN;
984:
985: /*
986: * IPv6 packets that have non 0 payload length
1.35 itojun 987: * must not contain a jumbo payload option.
1.22 itojun 988: */
989: ip6 = mtod(m, struct ip6_hdr *);
990: if (ip6->ip6_plen) {
991: ip6stat.ip6s_badoptions++;
992: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 993: ICMP6_PARAMPROB_HEADER,
994: erroff + opt - opthead);
995: return (-1);
1.22 itojun 996: }
1.2 itojun 997:
1.22 itojun 998: /*
999: * We may see jumbolen in unaligned location, so
1000: * we'd need to perform bcopy().
1001: */
1002: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
1003: jumboplen = (u_int32_t)htonl(jumboplen);
1004:
1005: #if 1
1006: /*
1007: * if there are multiple jumbo payload options,
1008: * *plenp will be non-zero and the packet will be
1009: * rejected.
1010: * the behavior may need some debate in ipngwg -
1011: * multiple options does not make sense, however,
1012: * there's no explicit mention in specification.
1013: */
1014: if (*plenp != 0) {
1015: ip6stat.ip6s_badoptions++;
1016: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1017: ICMP6_PARAMPROB_HEADER,
1018: erroff + opt + 2 - opthead);
1019: return (-1);
1.22 itojun 1020: }
1.8 itojun 1021: #endif
1.2 itojun 1022:
1.22 itojun 1023: /*
1024: * jumbo payload length must be larger than 65535.
1025: */
1026: if (jumboplen <= IPV6_MAXPACKET) {
1027: ip6stat.ip6s_badoptions++;
1028: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1029: ICMP6_PARAMPROB_HEADER,
1030: erroff + opt + 2 - opthead);
1031: return (-1);
1.22 itojun 1032: }
1033: *plenp = jumboplen;
1034:
1035: break;
1.35 itojun 1036: default: /* unknown option */
1037: if (hbhlen < IP6OPT_MINLEN) {
1038: ip6stat.ip6s_toosmall++;
1039: goto bad;
1040: }
1.55 itojun 1041: optlen = ip6_unknown_opt(opt, m,
1042: erroff + opt - opthead);
1043: if (optlen == -1)
1044: return (-1);
1.35 itojun 1045: optlen += 2;
1046: break;
1.2 itojun 1047: }
1048: }
1049:
1.55 itojun 1050: return (0);
1.2 itojun 1051:
1052: bad:
1053: m_freem(m);
1.55 itojun 1054: return (-1);
1.2 itojun 1055: }
1056:
1057: /*
1058: * Unknown option processing.
1059: * The third argument `off' is the offset from the IPv6 header to the option,
1060: * which is necessary if the IPv6 header the and option header and IPv6 header
1061: * is not continuous in order to return an ICMPv6 error.
1062: */
1063: int
1064: ip6_unknown_opt(optp, m, off)
1065: u_int8_t *optp;
1066: struct mbuf *m;
1067: int off;
1068: {
1069: struct ip6_hdr *ip6;
1070:
1.35 itojun 1071: switch (IP6OPT_TYPE(*optp)) {
1072: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1073: return ((int)*(optp + 1));
1.35 itojun 1074: case IP6OPT_TYPE_DISCARD: /* silently discard */
1075: m_freem(m);
1.58 itojun 1076: return (-1);
1.35 itojun 1077: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1078: ip6stat.ip6s_badoptions++;
1079: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1080: return (-1);
1.35 itojun 1081: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1082: ip6stat.ip6s_badoptions++;
1083: ip6 = mtod(m, struct ip6_hdr *);
1084: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1085: (m->m_flags & (M_BCAST|M_MCAST)))
1086: m_freem(m);
1087: else
1088: icmp6_error(m, ICMP6_PARAM_PROB,
1089: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1090: return (-1);
1.2 itojun 1091: }
1092:
1093: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1094: return (-1);
1.2 itojun 1095: }
1096:
1097: /*
1.9 itojun 1098: * Create the "control" list for this pcb.
1099: *
1100: * The routine will be called from upper layer handlers like tcp6_input().
1101: * Thus the routine assumes that the caller (tcp6_input) have already
1102: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1103: * very first mbuf on the mbuf chain.
1104: * We may want to add some infinite loop prevention or sanity checks for safety.
1105: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1106: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1107: */
1108: void
1109: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 1110: struct in6pcb *in6p;
1111: struct mbuf **mp;
1112: struct ip6_hdr *ip6;
1113: struct mbuf *m;
1.2 itojun 1114: {
1.85 rpaulo 1115: #ifdef RFC2292
1116: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1117: #else
1118: #define IS2292(x, y) (y)
1119: #endif
1120:
1.9 itojun 1121: #ifdef SO_TIMESTAMP
1.2 itojun 1122: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1123: struct timeval tv;
1124:
1125: microtime(&tv);
1.97 christos 1126: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1127: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1128: if (*mp)
1129: mp = &(*mp)->m_next;
1130: }
1.9 itojun 1131: #endif
1.87 rpaulo 1132:
1133: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1134: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1135: return;
1136:
1.2 itojun 1137: /* RFC 2292 sec. 5 */
1.35 itojun 1138: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1139: struct in6_pktinfo pi6;
1.85 rpaulo 1140:
1.2 itojun 1141: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1142: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1143: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1144: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1145: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1146: sizeof(struct in6_pktinfo),
1147: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1148: if (*mp)
1149: mp = &(*mp)->m_next;
1150: }
1.85 rpaulo 1151:
1.2 itojun 1152: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1153: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1154:
1.97 christos 1155: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1156: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1157: if (*mp)
1158: mp = &(*mp)->m_next;
1159: }
1160:
1161: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1162: u_int32_t flowinfo;
1163: int tclass;
1164:
1165: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1166: flowinfo >>= 20;
1167:
1168: tclass = flowinfo & 0xff;
1.97 christos 1169: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1170: IPV6_TCLASS, IPPROTO_IPV6);
1171:
1.2 itojun 1172: if (*mp)
1173: mp = &(*mp)->m_next;
1174: }
1175:
1176: /*
1.75 itojun 1177: * IPV6_HOPOPTS socket option. Recall that we required super-user
1178: * privilege for the option (see ip6_ctloutput), but it might be too
1179: * strict, since there might be some hop-by-hop options which can be
1180: * returned to normal user.
1.85 rpaulo 1181: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1182: */
1.75 itojun 1183: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1184: /*
1185: * Check if a hop-by-hop options header is contatined in the
1186: * received packet, and if so, store the options as ancillary
1187: * data. Note that a hop-by-hop options header must be
1188: * just after the IPv6 header, which fact is assured through
1189: * the IPv6 input processing.
1190: */
1.78 christos 1191: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1192: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1193: struct ip6_hbh *hbh;
1194: int hbhlen;
1.62 itojun 1195: struct mbuf *ext;
1.9 itojun 1196:
1.62 itojun 1197: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1198: xip6->ip6_nxt);
1.62 itojun 1199: if (ext == NULL) {
1.9 itojun 1200: ip6stat.ip6s_tooshort++;
1201: return;
1202: }
1.62 itojun 1203: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1204: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1205: if (hbhlen != ext->m_len) {
1206: m_freem(ext);
1.9 itojun 1207: ip6stat.ip6s_tooshort++;
1208: return;
1209: }
1.2 itojun 1210:
1211: /*
1212: * XXX: We copy whole the header even if a jumbo
1213: * payload option is included, which option is to
1214: * be removed before returning in the RFC 2292.
1.85 rpaulo 1215: * Note: this constraint is removed in RFC3542.
1.2 itojun 1216: */
1.97 christos 1217: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1218: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1219: IPPROTO_IPV6);
1.2 itojun 1220: if (*mp)
1221: mp = &(*mp)->m_next;
1.62 itojun 1222: m_freem(ext);
1.2 itojun 1223: }
1224: }
1225:
1226: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1227: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1228: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1229: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1230:
1231: /*
1232: * Search for destination options headers or routing
1233: * header(s) through the header chain, and stores each
1234: * header as ancillary data.
1235: * Note that the order of the headers remains in
1236: * the chain of ancillary data.
1237: */
1.86 rpaulo 1238: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1239: struct ip6_ext *ip6e = NULL;
1.9 itojun 1240: int elen;
1.62 itojun 1241: struct mbuf *ext = NULL;
1.9 itojun 1242:
1.62 itojun 1243: /*
1244: * if it is not an extension header, don't try to
1245: * pull it from the chain.
1246: */
1247: switch (nxt) {
1248: case IPPROTO_DSTOPTS:
1249: case IPPROTO_ROUTING:
1250: case IPPROTO_HOPOPTS:
1251: case IPPROTO_AH: /* is it possible? */
1252: break;
1253: default:
1254: goto loopend;
1255: }
1256:
1257: ext = ip6_pullexthdr(m, off, nxt);
1258: if (ext == NULL) {
1.9 itojun 1259: ip6stat.ip6s_tooshort++;
1260: return;
1261: }
1.62 itojun 1262: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1263: if (nxt == IPPROTO_AH)
1264: elen = (ip6e->ip6e_len + 2) << 2;
1265: else
1266: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1267: if (elen != ext->m_len) {
1268: m_freem(ext);
1.9 itojun 1269: ip6stat.ip6s_tooshort++;
1270: return;
1271: }
1.57 thorpej 1272: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1273:
1.35 itojun 1274: switch (nxt) {
1.62 itojun 1275: case IPPROTO_DSTOPTS:
1.35 itojun 1276: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1277: break;
1278:
1.97 christos 1279: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1280: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1281: IPPROTO_IPV6);
1.35 itojun 1282: if (*mp)
1283: mp = &(*mp)->m_next;
1284: break;
1285:
1286: case IPPROTO_ROUTING:
1287: if (!in6p->in6p_flags & IN6P_RTHDR)
1288: break;
1289:
1.97 christos 1290: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1291: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1292: IPPROTO_IPV6);
1.35 itojun 1293: if (*mp)
1294: mp = &(*mp)->m_next;
1295: break;
1296:
1.62 itojun 1297: case IPPROTO_HOPOPTS:
1298: case IPPROTO_AH: /* is it possible? */
1299: break;
1300:
1.35 itojun 1301: default:
1302: /*
1.62 itojun 1303: * other cases have been filtered in the above.
1304: * none will visit this case. here we supply
1305: * the code just in case (nxt overwritten or
1306: * other cases).
1.35 itojun 1307: */
1.62 itojun 1308: m_freem(ext);
1.35 itojun 1309: goto loopend;
1310:
1.2 itojun 1311: }
1312:
1313: /* proceed with the next header. */
1.9 itojun 1314: off += elen;
1.2 itojun 1315: nxt = ip6e->ip6e_nxt;
1.62 itojun 1316: ip6e = NULL;
1317: m_freem(ext);
1318: ext = NULL;
1.2 itojun 1319: }
1320: loopend:
1.62 itojun 1321: ;
1.2 itojun 1322: }
1.62 itojun 1323: }
1.85 rpaulo 1324: #undef IS2292
1325:
1326:
1327: void
1.95 dyoung 1328: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1329: uint32_t *mtu)
1.85 rpaulo 1330: {
1331: struct socket *so;
1332: struct mbuf *m_mtu;
1333: struct ip6_mtuinfo mtuctl;
1334:
1335: so = in6p->in6p_socket;
1336:
1337: if (mtu == NULL)
1338: return;
1339:
1340: #ifdef DIAGNOSTIC
1341: if (so == NULL) /* I believe this is impossible */
1342: panic("ip6_notify_pmtu: socket is NULL");
1343: #endif
1344:
1345: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1346: mtuctl.ip6m_mtu = *mtu;
1347: mtuctl.ip6m_addr = *dst;
1348: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1349: return;
1350:
1.97 christos 1351: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1352: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1353: return;
1354:
1.95 dyoung 1355: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1356: == 0) {
1357: m_freem(m_mtu);
1358: /* XXX: should count statistics */
1359: } else
1360: sorwakeup(so);
1361:
1362: return;
1363: }
1.62 itojun 1364:
1365: /*
1366: * pull single extension header from mbuf chain. returns single mbuf that
1367: * contains the result, or NULL on error.
1368: */
1369: static struct mbuf *
1370: ip6_pullexthdr(m, off, nxt)
1371: struct mbuf *m;
1372: size_t off;
1373: int nxt;
1374: {
1375: struct ip6_ext ip6e;
1376: size_t elen;
1377: struct mbuf *n;
1378:
1379: #ifdef DIAGNOSTIC
1380: switch (nxt) {
1381: case IPPROTO_DSTOPTS:
1382: case IPPROTO_ROUTING:
1383: case IPPROTO_HOPOPTS:
1384: case IPPROTO_AH: /* is it possible? */
1385: break;
1386: default:
1387: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1388: }
1.62 itojun 1389: #endif
1.2 itojun 1390:
1.97 christos 1391: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1392: if (nxt == IPPROTO_AH)
1393: elen = (ip6e.ip6e_len + 2) << 2;
1394: else
1395: elen = (ip6e.ip6e_len + 1) << 3;
1396:
1397: MGET(n, M_DONTWAIT, MT_DATA);
1398: if (n && elen >= MLEN) {
1399: MCLGET(n, M_DONTWAIT);
1400: if ((n->m_flags & M_EXT) == 0) {
1401: m_free(n);
1402: n = NULL;
1403: }
1404: }
1405: if (!n)
1406: return NULL;
1407:
1408: n->m_len = 0;
1409: if (elen >= M_TRAILINGSPACE(n)) {
1410: m_free(n);
1411: return NULL;
1412: }
1413:
1.97 christos 1414: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1415: n->m_len = elen;
1416: return n;
1.2 itojun 1417: }
1418:
1419: /*
1420: * Get pointer to the previous header followed by the header
1421: * currently processed.
1422: * XXX: This function supposes that
1423: * M includes all headers,
1424: * the next header field and the header length field of each header
1425: * are valid, and
1426: * the sum of each header length equals to OFF.
1427: * Because of these assumptions, this function must be called very
1428: * carefully. Moreover, it will not be used in the near future when
1429: * we develop `neater' mechanism to process extension headers.
1430: */
1.58 itojun 1431: u_int8_t *
1.2 itojun 1432: ip6_get_prevhdr(m, off)
1433: struct mbuf *m;
1434: int off;
1435: {
1436: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1437:
1438: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1439: return (&ip6->ip6_nxt);
1.2 itojun 1440: else {
1441: int len, nxt;
1442: struct ip6_ext *ip6e = NULL;
1443:
1444: nxt = ip6->ip6_nxt;
1445: len = sizeof(struct ip6_hdr);
1446: while (len < off) {
1.97 christos 1447: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1448:
1.35 itojun 1449: switch (nxt) {
1.2 itojun 1450: case IPPROTO_FRAGMENT:
1451: len += sizeof(struct ip6_frag);
1452: break;
1453: case IPPROTO_AH:
1454: len += (ip6e->ip6e_len + 2) << 2;
1455: break;
1456: default:
1457: len += (ip6e->ip6e_len + 1) << 3;
1458: break;
1459: }
1460: nxt = ip6e->ip6e_nxt;
1461: }
1462: if (ip6e)
1.58 itojun 1463: return (&ip6e->ip6e_nxt);
1.2 itojun 1464: else
1465: return NULL;
1.18 itojun 1466: }
1467: }
1468:
1469: /*
1470: * get next header offset. m will be retained.
1471: */
1472: int
1473: ip6_nexthdr(m, off, proto, nxtp)
1474: struct mbuf *m;
1475: int off;
1476: int proto;
1477: int *nxtp;
1478: {
1479: struct ip6_hdr ip6;
1480: struct ip6_ext ip6e;
1481: struct ip6_frag fh;
1482:
1483: /* just in case */
1484: if (m == NULL)
1485: panic("ip6_nexthdr: m == NULL");
1486: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1487: return -1;
1488:
1489: switch (proto) {
1490: case IPPROTO_IPV6:
1.83 rpaulo 1491: /* do not chase beyond intermediate IPv6 headers */
1492: if (off != 0)
1493: return -1;
1.18 itojun 1494: if (m->m_pkthdr.len < off + sizeof(ip6))
1495: return -1;
1.97 christos 1496: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1497: if (nxtp)
1498: *nxtp = ip6.ip6_nxt;
1499: off += sizeof(ip6);
1500: return off;
1501:
1502: case IPPROTO_FRAGMENT:
1503: /*
1504: * terminate parsing if it is not the first fragment,
1505: * it does not make sense to parse through it.
1506: */
1507: if (m->m_pkthdr.len < off + sizeof(fh))
1508: return -1;
1.97 christos 1509: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1510: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1511: return -1;
1512: if (nxtp)
1513: *nxtp = fh.ip6f_nxt;
1514: off += sizeof(struct ip6_frag);
1515: return off;
1516:
1517: case IPPROTO_AH:
1518: if (m->m_pkthdr.len < off + sizeof(ip6e))
1519: return -1;
1.97 christos 1520: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1521: if (nxtp)
1522: *nxtp = ip6e.ip6e_nxt;
1523: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1524: if (m->m_pkthdr.len < off)
1525: return -1;
1.18 itojun 1526: return off;
1527:
1528: case IPPROTO_HOPOPTS:
1529: case IPPROTO_ROUTING:
1530: case IPPROTO_DSTOPTS:
1531: if (m->m_pkthdr.len < off + sizeof(ip6e))
1532: return -1;
1.97 christos 1533: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1534: if (nxtp)
1535: *nxtp = ip6e.ip6e_nxt;
1536: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1537: if (m->m_pkthdr.len < off)
1538: return -1;
1.18 itojun 1539: return off;
1540:
1541: case IPPROTO_NONE:
1542: case IPPROTO_ESP:
1543: case IPPROTO_IPCOMP:
1544: /* give up */
1545: return -1;
1546:
1547: default:
1548: return -1;
1549: }
1550: }
1551:
1552: /*
1553: * get offset for the last header in the chain. m will be kept untainted.
1554: */
1555: int
1556: ip6_lasthdr(m, off, proto, nxtp)
1557: struct mbuf *m;
1558: int off;
1559: int proto;
1560: int *nxtp;
1561: {
1562: int newoff;
1563: int nxt;
1564:
1565: if (!nxtp) {
1566: nxt = -1;
1567: nxtp = &nxt;
1568: }
1.86 rpaulo 1569: for (;;) {
1.18 itojun 1570: newoff = ip6_nexthdr(m, off, proto, nxtp);
1571: if (newoff < 0)
1572: return off;
1573: else if (newoff < off)
1574: return -1; /* invalid */
1575: else if (newoff == off)
1576: return newoff;
1577:
1578: off = newoff;
1579: proto = *nxtp;
1.2 itojun 1580: }
1581: }
1582:
1.81 rpaulo 1583: struct m_tag *
1584: ip6_addaux(m)
1585: struct mbuf *m;
1586: {
1587: struct m_tag *mtag;
1588:
1589: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1590: if (!mtag) {
1591: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1592: M_NOWAIT);
1593: if (mtag) {
1594: m_tag_prepend(m, mtag);
1595: bzero(mtag + 1, sizeof(struct ip6aux));
1596: }
1597: }
1598: return mtag;
1599: }
1600:
1601: struct m_tag *
1602: ip6_findaux(m)
1603: struct mbuf *m;
1604: {
1605: struct m_tag *mtag;
1606:
1607: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1608: return mtag;
1609: }
1610:
1611: void
1612: ip6_delaux(m)
1613: struct mbuf *m;
1614: {
1615: struct m_tag *mtag;
1616:
1617: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1618: if (mtag)
1619: m_tag_delete(m, mtag);
1620: }
1621:
1.98 liamjfoy 1622: #ifdef GATEWAY
1623: /*
1624: * sysctl helper routine for net.inet.ip6.maxflows. Since
1625: * we could reduce this value, call ip6flow_reap();
1626: */
1627: static int
1.101 liamjfoy 1628: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1629: {
1630: int s;
1631:
1632: s = sysctl_lookup(SYSCTLFN_CALL(rnode));
1.100 liamjfoy 1633: if (s || newp == NULL)
1.98 liamjfoy 1634: return (s);
1635:
1636: s = splsoftnet();
1637: ip6flow_reap(0);
1638: splx(s);
1639:
1640: return (0);
1641: }
1.99 liamjfoy 1642:
1643: static int
1644: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1645: {
1646: int error, tmp;
1647: struct sysctlnode node;
1648:
1649: node = *rnode;
1650: tmp = ip6_hashsize;
1651: node.sysctl_data = &tmp;
1652: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1653: if (error || newp == NULL)
1654: return (error);
1655:
1656: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1657: /*
1658: * Can only fail due to malloc()
1659: */
1660: if (ip6flow_invalidate_all(tmp))
1661: return ENOMEM;
1662: } else {
1663: /*
1664: * EINVAL if not a power of 2
1665: */
1666: return EINVAL;
1667: }
1668:
1669: return (0);
1670: }
1.98 liamjfoy 1671: #endif /* GATEWAY */
1672:
1.102 christos 1673: static int
1674: sysctl_net_inet6_ip6_rht0(SYSCTLFN_ARGS)
1675: {
1676: int error, tmp;
1677: struct sysctlnode node;
1678:
1679: node = *rnode;
1680: tmp = ip6_rht0;
1681: node.sysctl_data = &tmp;
1682: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1683: if (error || newp == NULL)
1684: return error;
1685:
1686: switch (tmp) {
1687: case -1: /* disable processing */
1688: case 0: /* disable for host, enable for router */
1689: case 1: /* enable for all */
1690: break;
1691: default:
1692: return EINVAL;
1693: }
1694: ip6_rht0 = tmp;
1695: return 0;
1696: }
1697:
1.2 itojun 1698: /*
1699: * System control for IP6
1700: */
1701:
1702: u_char inet6ctlerrmap[PRC_NCMDS] = {
1703: 0, 0, 0, 0,
1704: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1705: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1706: EMSGSIZE, EHOSTUNREACH, 0, 0,
1707: 0, 0, 0, 0,
1708: ENOPROTOOPT
1709: };
1710:
1.70 atatat 1711: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1712: {
1.85 rpaulo 1713: #ifdef RFC2292
1714: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1715: #else
1716: #define IS2292(x, y) (y)
1717: #endif
1.26 itojun 1718:
1.73 atatat 1719: sysctl_createv(clog, 0, NULL, NULL,
1720: CTLFLAG_PERMANENT,
1.70 atatat 1721: CTLTYPE_NODE, "net", NULL,
1722: NULL, 0, NULL, 0,
1723: CTL_NET, CTL_EOL);
1.73 atatat 1724: sysctl_createv(clog, 0, NULL, NULL,
1725: CTLFLAG_PERMANENT,
1.74 atatat 1726: CTLTYPE_NODE, "inet6",
1727: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1728: NULL, 0, NULL, 0,
1729: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1730: sysctl_createv(clog, 0, NULL, NULL,
1731: CTLFLAG_PERMANENT,
1.74 atatat 1732: CTLTYPE_NODE, "ip6",
1733: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1734: NULL, 0, NULL, 0,
1735: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1736:
1.73 atatat 1737: sysctl_createv(clog, 0, NULL, NULL,
1738: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1739: CTLTYPE_INT, "forwarding",
1740: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1741: NULL, 0, &ip6_forwarding, 0,
1742: CTL_NET, PF_INET6, IPPROTO_IPV6,
1743: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1744: sysctl_createv(clog, 0, NULL, NULL,
1745: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1746: CTLTYPE_INT, "redirect",
1747: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1748: NULL, 0, &ip6_sendredirects, 0,
1749: CTL_NET, PF_INET6, IPPROTO_IPV6,
1750: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1751: sysctl_createv(clog, 0, NULL, NULL,
1752: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1753: CTLTYPE_INT, "hlim",
1754: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1755: NULL, 0, &ip6_defhlim, 0,
1756: CTL_NET, PF_INET6, IPPROTO_IPV6,
1757: IPV6CTL_DEFHLIM, CTL_EOL);
1758: #ifdef notyet
1.73 atatat 1759: sysctl_createv(clog, 0, NULL, NULL,
1760: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1761: CTLTYPE_INT, "mtu", NULL,
1762: NULL, 0, &, 0,
1763: CTL_NET, PF_INET6, IPPROTO_IPV6,
1764: IPV6CTL_DEFMTU, CTL_EOL);
1765: #endif
1766: #ifdef __no_idea__
1.73 atatat 1767: sysctl_createv(clog, 0, NULL, NULL,
1768: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1769: CTLTYPE_INT, "forwsrcrt", NULL,
1770: NULL, 0, &?, 0,
1771: CTL_NET, PF_INET6, IPPROTO_IPV6,
1772: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1773: sysctl_createv(clog, 0, NULL, NULL,
1774: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1775: CTLTYPE_STRUCT, "mrtstats", NULL,
1776: NULL, 0, &?, sizeof(?),
1777: CTL_NET, PF_INET6, IPPROTO_IPV6,
1778: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1779: sysctl_createv(clog, 0, NULL, NULL,
1780: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1781: CTLTYPE_?, "mrtproto", NULL,
1782: NULL, 0, &?, sizeof(?),
1783: CTL_NET, PF_INET6, IPPROTO_IPV6,
1784: IPV6CTL_MRTPROTO, CTL_EOL);
1785: #endif
1.73 atatat 1786: sysctl_createv(clog, 0, NULL, NULL,
1787: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1788: CTLTYPE_INT, "maxfragpackets",
1789: SYSCTL_DESCR("Maximum number of fragments to buffer "
1790: "for reassembly"),
1.70 atatat 1791: NULL, 0, &ip6_maxfragpackets, 0,
1792: CTL_NET, PF_INET6, IPPROTO_IPV6,
1793: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1794: #ifdef __no_idea__
1.73 atatat 1795: sysctl_createv(clog, 0, NULL, NULL,
1796: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1797: CTLTYPE_INT, "sourcecheck", NULL,
1798: NULL, 0, &?, 0,
1799: CTL_NET, PF_INET6, IPPROTO_IPV6,
1800: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1801: sysctl_createv(clog, 0, NULL, NULL,
1802: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1803: CTLTYPE_INT, "sourcecheck_logint", NULL,
1804: NULL, 0, &?, 0,
1805: CTL_NET, PF_INET6, IPPROTO_IPV6,
1806: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1807: #endif
1.73 atatat 1808: sysctl_createv(clog, 0, NULL, NULL,
1809: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1810: CTLTYPE_INT, "accept_rtadv",
1811: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1812: NULL, 0, &ip6_accept_rtadv, 0,
1813: CTL_NET, PF_INET6, IPPROTO_IPV6,
1814: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1815: sysctl_createv(clog, 0, NULL, NULL,
1816: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1817: CTLTYPE_INT, "keepfaith",
1818: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1819: NULL, 0, &ip6_keepfaith, 0,
1820: CTL_NET, PF_INET6, IPPROTO_IPV6,
1821: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1822: sysctl_createv(clog, 0, NULL, NULL,
1823: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1824: CTLTYPE_INT, "log_interval",
1825: SYSCTL_DESCR("Minumum interval between logging "
1826: "unroutable packets"),
1.70 atatat 1827: NULL, 0, &ip6_log_interval, 0,
1828: CTL_NET, PF_INET6, IPPROTO_IPV6,
1829: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1830: sysctl_createv(clog, 0, NULL, NULL,
1831: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1832: CTLTYPE_INT, "hdrnestlimit",
1833: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1834: NULL, 0, &ip6_hdrnestlimit, 0,
1835: CTL_NET, PF_INET6, IPPROTO_IPV6,
1836: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1837: sysctl_createv(clog, 0, NULL, NULL,
1838: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1839: CTLTYPE_INT, "dad_count",
1840: SYSCTL_DESCR("Number of Duplicate Address Detection "
1841: "probes to send"),
1.70 atatat 1842: NULL, 0, &ip6_dad_count, 0,
1843: CTL_NET, PF_INET6, IPPROTO_IPV6,
1844: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1845: sysctl_createv(clog, 0, NULL, NULL,
1846: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1847: CTLTYPE_INT, "auto_flowlabel",
1848: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1849: NULL, 0, &ip6_auto_flowlabel, 0,
1850: CTL_NET, PF_INET6, IPPROTO_IPV6,
1851: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1852: sysctl_createv(clog, 0, NULL, NULL,
1853: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1854: CTLTYPE_INT, "defmcasthlim",
1855: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1856: NULL, 0, &ip6_defmcasthlim, 0,
1857: CTL_NET, PF_INET6, IPPROTO_IPV6,
1858: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1859: #if NGIF > 0
1.73 atatat 1860: sysctl_createv(clog, 0, NULL, NULL,
1861: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1862: CTLTYPE_INT, "gifhlim",
1863: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1864: NULL, 0, &ip6_gif_hlim, 0,
1865: CTL_NET, PF_INET6, IPPROTO_IPV6,
1866: IPV6CTL_GIF_HLIM, CTL_EOL);
1867: #endif /* NGIF */
1.73 atatat 1868: sysctl_createv(clog, 0, NULL, NULL,
1869: CTLFLAG_PERMANENT,
1.74 atatat 1870: CTLTYPE_STRING, "kame_version",
1871: SYSCTL_DESCR("KAME Version"),
1.78 christos 1872: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1873: CTL_NET, PF_INET6, IPPROTO_IPV6,
1874: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1875: sysctl_createv(clog, 0, NULL, NULL,
1876: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1877: CTLTYPE_INT, "use_deprecated",
1878: SYSCTL_DESCR("Allow use of deprecated addresses as "
1879: "source addresses"),
1.70 atatat 1880: NULL, 0, &ip6_use_deprecated, 0,
1881: CTL_NET, PF_INET6, IPPROTO_IPV6,
1882: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1883: sysctl_createv(clog, 0, NULL, NULL,
1884: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1885: CTLTYPE_INT, "rr_prune", NULL,
1886: NULL, 0, &ip6_rr_prune, 0,
1887: CTL_NET, PF_INET6, IPPROTO_IPV6,
1888: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1889: sysctl_createv(clog, 0, NULL, NULL,
1890: CTLFLAG_PERMANENT
1.70 atatat 1891: #ifndef INET6_BINDV6ONLY
1.73 atatat 1892: |CTLFLAG_READWRITE,
1.70 atatat 1893: #endif
1.74 atatat 1894: CTLTYPE_INT, "v6only",
1895: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1896: "to PF_INET sockets"),
1.70 atatat 1897: NULL, 0, &ip6_v6only, 0,
1898: CTL_NET, PF_INET6, IPPROTO_IPV6,
1899: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1900: sysctl_createv(clog, 0, NULL, NULL,
1901: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1902: CTLTYPE_INT, "anonportmin",
1903: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1904: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1905: CTL_NET, PF_INET6, IPPROTO_IPV6,
1906: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1907: sysctl_createv(clog, 0, NULL, NULL,
1908: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1909: CTLTYPE_INT, "anonportmax",
1910: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1911: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1912: CTL_NET, PF_INET6, IPPROTO_IPV6,
1913: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1914: #ifndef IPNOPRIVPORTS
1.73 atatat 1915: sysctl_createv(clog, 0, NULL, NULL,
1916: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1917: CTLTYPE_INT, "lowportmin",
1918: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1919: "to assign"),
1.70 atatat 1920: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1921: CTL_NET, PF_INET6, IPPROTO_IPV6,
1922: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1923: sysctl_createv(clog, 0, NULL, NULL,
1924: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1925: CTLTYPE_INT, "lowportmax",
1926: SYSCTL_DESCR("Highest privileged ephemeral port number "
1927: "to assign"),
1.70 atatat 1928: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1929: CTL_NET, PF_INET6, IPPROTO_IPV6,
1930: IPV6CTL_LOWPORTMAX, CTL_EOL);
1931: #endif /* IPNOPRIVPORTS */
1.73 atatat 1932: sysctl_createv(clog, 0, NULL, NULL,
1933: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1934: CTLTYPE_INT, "use_tempaddr",
1935: SYSCTL_DESCR("Use temporary address"),
1936: NULL, 0, &ip6_use_tempaddr, 0,
1937: CTL_NET, PF_INET6, IPPROTO_IPV6,
1938: CTL_CREATE, CTL_EOL);
1939: sysctl_createv(clog, 0, NULL, NULL,
1940: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1941: CTLTYPE_INT, "temppltime",
1942: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1943: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1944: CTL_NET, PF_INET6, IPPROTO_IPV6,
1945: CTL_CREATE, CTL_EOL);
1946: sysctl_createv(clog, 0, NULL, NULL,
1947: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1948: CTLTYPE_INT, "tempvltime",
1949: SYSCTL_DESCR("valid lifetime of a temporary address"),
1950: NULL, 0, &ip6_temp_valid_lifetime, 0,
1951: CTL_NET, PF_INET6, IPPROTO_IPV6,
1952: CTL_CREATE, CTL_EOL);
1953: sysctl_createv(clog, 0, NULL, NULL,
1954: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1955: CTLTYPE_INT, "maxfrags",
1956: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1957: NULL, 0, &ip6_maxfrags, 0,
1958: CTL_NET, PF_INET6, IPPROTO_IPV6,
1959: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1960: sysctl_createv(clog, 0, NULL, NULL,
1961: CTLFLAG_PERMANENT,
1962: CTLTYPE_STRUCT, "stats",
1963: SYSCTL_DESCR("IPv6 statistics"),
1964: NULL, 0, &ip6stat, sizeof(ip6stat),
1965: CTL_NET, PF_INET6, IPPROTO_IPV6,
1966: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1967: sysctl_createv(clog, 0, NULL, NULL,
1968: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1969: CTLTYPE_INT, "use_defaultzone",
1970: SYSCTL_DESCR("Whether to use the default scope zones"),
1971: NULL, 0, &ip6_use_defzone, 0,
1972: CTL_NET, PF_INET6, IPPROTO_IPV6,
1973: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1974: sysctl_createv(clog, 0, NULL, NULL,
1975: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1976: CTLTYPE_INT, "mcast_pmtu",
1977: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1978: NULL, 0, &ip6_mcast_pmtu, 0,
1979: CTL_NET, PF_INET6, IPPROTO_IPV6,
1980: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1981: #ifdef GATEWAY
1982: sysctl_createv(clog, 0, NULL, NULL,
1983: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1984: CTLTYPE_INT, "maxflows",
1985: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.101 liamjfoy 1986: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1987: CTL_NET, PF_INET6, IPPROTO_IPV6,
1988: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1989: sysctl_createv(clog, 0, NULL, NULL,
1990: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1991: CTLTYPE_INT, "hashsize",
1992: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1993: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1994: CTL_NET, PF_INET6, IPPROTO_IPV6,
1995: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1996: #endif
1.102 christos 1997: sysctl_createv(clog, 0, NULL, NULL,
1998: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1999: CTLTYPE_INT, "rht0",
2000: SYSCTL_DESCR("Processing of routing header type 0 (IPv6)"),
2001: sysctl_net_inet6_ip6_rht0, 0, &ip6_rht0, 0,
2002: CTL_NET, PF_INET6, IPPROTO_IPV6,
2003: CTL_CREATE, CTL_EOL);
1.2 itojun 2004: }
CVSweb <webmaster@jp.NetBSD.org>