Annotation of src/sys/netinet6/ip6_input.c, Revision 1.98
1.98 ! liamjfoy 1: /* $NetBSD: ip6_input.c,v 1.97 2007/03/04 06:03:26 christos 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>
1.98 ! liamjfoy 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.97 2007/03/04 06:03:26 christos 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:
1.83 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
! 186: ip6flow_init();
! 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:
240: extern struct route_in6 ip6_forward_rt;
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;
1.2 itojun 249: int nxt, ours = 0;
1.9 itojun 250: struct ifnet *deliverifp = NULL;
1.64 itojun 251: int srcrt = 0;
1.94 degroote 252: #ifdef FAST_IPSEC
253: struct m_tag *mtag;
254: struct tdb_ident *tdbi;
255: struct secpolicy *sp;
256: int s, error;
257: #endif
1.2 itojun 258:
259: #ifdef IPSEC
260: /*
261: * should the inner packet be considered authentic?
262: * see comment in ah4_input().
263: */
1.49 itojun 264: m->m_flags &= ~M_AUTHIPHDR;
265: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 266: #endif
1.9 itojun 267:
1.2 itojun 268: /*
1.81 rpaulo 269: * make sure we don't have onion peering information into m_tag.
270: */
271: ip6_delaux(m);
272:
273: /*
1.44 itojun 274: * mbuf statistics
1.2 itojun 275: */
276: if (m->m_flags & M_EXT) {
277: if (m->m_next)
278: ip6stat.ip6s_mext2m++;
279: else
280: ip6stat.ip6s_mext1++;
281: } else {
1.96 dyoung 282: #define M2MMAX __arraycount(ip6stat.ip6s_m2m)
1.2 itojun 283: if (m->m_next) {
1.9 itojun 284: if (m->m_flags & M_LOOP) {
1.77 peter 285: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 286: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 287: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
288: else
289: ip6stat.ip6s_m2m[0]++;
290: } else
291: ip6stat.ip6s_m1++;
1.40 itojun 292: #undef M2MMAX
1.2 itojun 293: }
294:
1.9 itojun 295: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
296: ip6stat.ip6s_total++;
297:
1.57 thorpej 298: /*
299: * If the IPv6 header is not aligned, slurp it up into a new
300: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 301: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 302: * IPv6 header is in the first mbuf of the chain.
303: */
1.97 christos 304: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 305: struct ifnet *inifp = m->m_pkthdr.rcvif;
306: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
307: (max_linkhdr + 3) & ~3)) == NULL) {
308: /* XXXJRT new stat, please */
309: ip6stat.ip6s_toosmall++;
310: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
311: return;
312: }
313: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
314: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 315: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 316: ip6stat.ip6s_toosmall++;
317: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
318: return;
319: }
1.2 itojun 320: }
321:
322: ip6 = mtod(m, struct ip6_hdr *);
323:
324: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
325: ip6stat.ip6s_badvers++;
1.9 itojun 326: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 327: goto bad;
328: }
1.15 darrenr 329:
1.98 ! liamjfoy 330: #if defined(IPSEC)
! 331: /* IPv6 fast forwarding is not compatible with IPsec. */
! 332: m->m_flags &= ~M_CANFASTFWD;
! 333: #else
! 334: /*
! 335: * Assume that we can create a fast-forward IP flow entry
! 336: * based on this packet.
! 337: */
! 338: m->m_flags |= M_CANFASTFWD;
! 339: #endif
! 340:
1.15 darrenr 341: #ifdef PFIL_HOOKS
342: /*
343: * Run through list of hooks for input packets. If there are any
344: * filters which require that additional packets in the flow are
345: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
346: * Note that filters must _never_ set this flag, as another filter
347: * in the list may have previously cleared it.
348: */
1.39 itojun 349: /*
350: * let ipfilter look at packet on the wire,
351: * not the decapsulated packet.
352: */
353: #ifdef IPSEC
1.42 itojun 354: if (!ipsec_getnhist(m))
1.94 degroote 355: #elif defined(FAST_IPSEC)
356: if (!ipsec_indone(m))
1.39 itojun 357: #else
358: if (1)
359: #endif
360: {
1.64 itojun 361: struct in6_addr odst;
362:
363: odst = ip6->ip6_dst;
1.39 itojun 364: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
365: PFIL_IN) != 0)
366: return;
367: if (m == NULL)
368: return;
369: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 370: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 371: }
1.15 darrenr 372: #endif /* PFIL_HOOKS */
373:
1.2 itojun 374: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
375:
1.30 thorpej 376: #ifdef ALTQ
377: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
378: /* packet is dropped by traffic conditioner */
379: return;
1.9 itojun 380: }
381: #endif
382:
1.2 itojun 383: /*
1.44 itojun 384: * Check against address spoofing/corruption.
1.2 itojun 385: */
386: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
387: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 388: /*
389: * XXX: "badscope" is not very suitable for a multicast source.
390: */
1.2 itojun 391: ip6stat.ip6s_badscope++;
1.9 itojun 392: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 393: goto bad;
394: }
1.13 itojun 395: /*
1.44 itojun 396: * The following check is not documented in specs. A malicious
397: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
398: * and bypass security checks (act as if it was from 127.0.0.1 by using
399: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 400: *
1.44 itojun 401: * This check chokes if we are in an SIIT cloud. As none of BSDs
402: * support IPv4-less kernel compilation, we cannot support SIIT
403: * environment at all. So, it makes more sense for us to reject any
404: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 405: * partial support for SIIT environment.
1.13 itojun 406: */
407: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
408: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
409: ip6stat.ip6s_badscope++;
410: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
411: goto bad;
412: }
1.17 itojun 413: #if 0
1.13 itojun 414: /*
1.17 itojun 415: * Reject packets with IPv4 compatible addresses (auto tunnel).
416: *
417: * The code forbids auto tunnel relay case in RFC1933 (the check is
418: * stronger than RFC1933). We may want to re-enable it if mech-xx
419: * is revised to forbid relaying case.
1.13 itojun 420: */
421: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
422: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
423: ip6stat.ip6s_badscope++;
424: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
425: goto bad;
426: }
427: #endif
1.35 itojun 428:
1.2 itojun 429: /*
1.82 yamt 430: * Disambiguate address scope zones (if there is ambiguity).
431: * We first make sure that the original source or destination address
432: * is not in our internal form for scoped addresses. Such addresses
433: * are not necessarily invalid spec-wise, but we cannot accept them due
434: * to the usage conflict.
435: * in6_setscope() then also checks and rejects the cases where src or
436: * dst are the loopback address and the receiving interface
437: * is not loopback.
438: */
1.88 bouyer 439: if (__predict_false(
440: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
441: goto bad;
442: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 443: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
444: ip6stat.ip6s_badscope++; /* XXX */
445: goto bad;
446: }
447: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
448: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
449: ip6stat.ip6s_badscope++;
450: goto bad;
451: }
452:
453: /*
1.2 itojun 454: * Multicast check
455: */
456: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
457: struct in6_multi *in6m = 0;
1.9 itojun 458:
459: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 460: /*
461: * See if we belong to the destination multicast group on the
462: * arrival interface.
463: */
464: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
465: if (in6m)
466: ours = 1;
467: else if (!ip6_mrouter) {
468: ip6stat.ip6s_notmember++;
469: ip6stat.ip6s_cantforward++;
1.9 itojun 470: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 471: goto bad;
472: }
1.9 itojun 473: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 474: goto hbhcheck;
475: }
476:
477: /*
478: * Unicast check
479: */
1.93 joerg 480: if (!IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.95 dyoung 481: &((const struct sockaddr_in6 *)rtcache_getdst((const struct route *)&ip6_forward_rt))->sin6_addr))
1.93 joerg 482: rtcache_free((struct route *)&ip6_forward_rt);
483: else
484: rtcache_check((struct route *)&ip6_forward_rt);
485: if (ip6_forward_rt.ro_rt != NULL) {
486: /* XXX Revalidated route is accounted wrongly. */
1.25 itojun 487: ip6stat.ip6s_forward_cachehit++;
1.93 joerg 488: } else {
1.35 itojun 489: struct sockaddr_in6 *dst6;
490:
1.93 joerg 491: ip6stat.ip6s_forward_cachemiss++;
1.22 itojun 492:
1.95 dyoung 493: dst6 = &ip6_forward_rt.ro_dst;
494: memset(dst6, 0, sizeof(*dst6));
1.35 itojun 495: dst6->sin6_len = sizeof(struct sockaddr_in6);
496: dst6->sin6_family = AF_INET6;
497: dst6->sin6_addr = ip6->ip6_dst;
1.2 itojun 498:
1.93 joerg 499: rtcache_init((struct route *)&ip6_forward_rt);
1.2 itojun 500: }
501:
502: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
503:
504: /*
505: * Accept the packet if the forwarding interface to the destination
506: * according to the routing table is the loopback interface,
507: * unless the associated route has a gateway.
508: * Note that this approach causes to accept a packet if there is a
509: * route to the loopback interface for the destination of the packet.
510: * But we think it's even useful in some situations, e.g. when using
511: * a special daemon which wants to intercept the packet.
512: */
1.91 dyoung 513: if (ip6_forward_rt.ro_rt != NULL &&
1.2 itojun 514: (ip6_forward_rt.ro_rt->rt_flags &
515: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55 itojun 516: !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2 itojun 517: #if 0
518: /*
519: * The check below is redundant since the comparison of
520: * the destination and the key of the rtentry has
521: * already done through looking up the routing table.
522: */
523: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55 itojun 524: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2 itojun 525: #endif
1.9 itojun 526: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 527: struct in6_ifaddr *ia6 =
528: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
529: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
530: m->m_flags |= M_ANYCAST6;
1.24 itojun 531: /*
532: * packets to a tentative, duplicated, or somehow invalid
533: * address must not be accepted.
534: */
1.2 itojun 535: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 536: /* this address is ready */
1.2 itojun 537: ours = 1;
1.9 itojun 538: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 539: goto hbhcheck;
540: } else {
1.24 itojun 541: /* address is not ready, so discard the packet. */
1.34 itojun 542: nd6log((LOG_INFO,
1.27 itojun 543: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 544: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 545: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 546:
547: goto bad;
1.2 itojun 548: }
549: }
550:
551: /*
1.55 itojun 552: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 553: */
554: #if defined(NFAITH) && 0 < NFAITH
555: if (ip6_keepfaith) {
1.91 dyoung 556: if (ip6_forward_rt.ro_rt != NULL &&
557: ip6_forward_rt.ro_rt->rt_ifp != NULL &&
1.71 itojun 558: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 559: /* XXX do we need more sanity checks? */
560: ours = 1;
1.45 itojun 561: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 562: goto hbhcheck;
563: }
564: }
565: #endif
566:
567: #if 0
568: {
569: /*
570: * Last resort: check in6_ifaddr for incoming interface.
571: * The code is here until I update the "goto ours hack" code above
572: * working right.
573: */
574: struct ifaddr *ifa;
1.91 dyoung 575: TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) {
1.9 itojun 576: if (ifa->ifa_addr == NULL)
577: continue; /* just for safety */
578: if (ifa->ifa_addr->sa_family != AF_INET6)
579: continue;
580: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
581: ours = 1;
582: deliverifp = ifa->ifa_ifp;
1.2 itojun 583: goto hbhcheck;
584: }
585: }
1.9 itojun 586: }
1.2 itojun 587: #endif
588:
589: /*
590: * Now there is no reason to process the packet if it's not our own
591: * and we're not a router.
592: */
593: if (!ip6_forwarding) {
594: ip6stat.ip6s_cantforward++;
1.9 itojun 595: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 596: goto bad;
597: }
598:
599: hbhcheck:
600: /*
1.81 rpaulo 601: * record address information into m_tag, if we don't have one yet.
602: * note that we are unable to record it, if the address is not listed
603: * as our interface address (e.g. multicast addresses, addresses
604: * within FAITH prefixes and such).
605: */
606: if (deliverifp && !ip6_getdstifaddr(m)) {
607: struct in6_ifaddr *ia6;
608:
609: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
610: if (ia6) {
611: if (!ip6_setdstifaddr(m, ia6)) {
612: /*
613: * XXX maybe we should drop the packet here,
614: * as we could not provide enough information
615: * to the upper layers.
616: */
617: }
618: }
619: }
620:
621: /*
1.2 itojun 622: * Process Hop-by-Hop options header if it's contained.
623: * m may be modified in ip6_hopopts_input().
624: * If a JumboPayload option is included, plen will also be modified.
625: */
626: plen = (u_int32_t)ntohs(ip6->ip6_plen);
627: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 628: struct ip6_hbh *hbh;
629:
630: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
631: #if 0 /*touches NULL pointer*/
632: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
633: #endif
1.2 itojun 634: return; /* m have already been freed */
1.9 itojun 635: }
1.22 itojun 636:
1.2 itojun 637: /* adjust pointer */
638: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 639:
640: /*
1.49 itojun 641: * if the payload length field is 0 and the next header field
1.22 itojun 642: * indicates Hop-by-Hop Options header, then a Jumbo Payload
643: * option MUST be included.
644: */
645: if (ip6->ip6_plen == 0 && plen == 0) {
646: /*
647: * Note that if a valid jumbo payload option is
1.83 rpaulo 648: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 649: * (non-zero) payload length to the variable plen.
1.22 itojun 650: */
651: ip6stat.ip6s_badoptions++;
652: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
653: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
654: icmp6_error(m, ICMP6_PARAM_PROB,
655: ICMP6_PARAMPROB_HEADER,
1.97 christos 656: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 657: return;
658: }
1.9 itojun 659: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
660: sizeof(struct ip6_hbh));
661: if (hbh == NULL) {
662: ip6stat.ip6s_tooshort++;
663: return;
664: }
1.57 thorpej 665: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 666: nxt = hbh->ip6h_nxt;
1.2 itojun 667:
668: /*
669: * accept the packet if a router alert option is included
670: * and we act as an IPv6 router.
671: */
1.5 itojun 672: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 673: ours = 1;
674: } else
675: nxt = ip6->ip6_nxt;
676:
677: /*
678: * Check that the amount of data in the buffers
679: * is as at least much as the IPv6 header would have us expect.
680: * Trim mbufs if longer than we expect.
681: * Drop packet if shorter than we expect.
682: */
683: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
684: ip6stat.ip6s_tooshort++;
1.9 itojun 685: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 686: goto bad;
687: }
688: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
689: if (m->m_len == m->m_pkthdr.len) {
690: m->m_len = sizeof(struct ip6_hdr) + plen;
691: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
692: } else
693: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
694: }
695:
696: /*
697: * Forward if desirable.
698: */
699: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
700: /*
701: * If we are acting as a multicast router, all
702: * incoming multicast packets are passed to the
703: * kernel-level multicast forwarding function.
704: * The packet is returned (relatively) intact; if
705: * ip6_mforward() returns a non-zero value, the packet
706: * must be discarded, else it may be accepted below.
707: */
708: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
709: ip6stat.ip6s_cantforward++;
710: m_freem(m);
711: return;
712: }
713: if (!ours) {
714: m_freem(m);
715: return;
716: }
1.22 itojun 717: } else if (!ours) {
1.64 itojun 718: ip6_forward(m, srcrt);
1.2 itojun 719: return;
1.56 itojun 720: }
1.25 itojun 721:
722: ip6 = mtod(m, struct ip6_hdr *);
723:
724: /*
725: * Malicious party may be able to use IPv4 mapped addr to confuse
726: * tcp/udp stack and bypass security checks (act as if it was from
727: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
728: *
729: * For SIIT end node behavior, you may want to disable the check.
730: * However, you will become vulnerable to attacks using IPv4 mapped
731: * source.
732: */
733: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
734: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
735: ip6stat.ip6s_badscope++;
736: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
737: goto bad;
738: }
1.2 itojun 739:
740: /*
741: * Tell launch routine the next header
742: */
1.12 itojun 743: #ifdef IFA_STATS
1.28 itojun 744: if (deliverifp != NULL) {
1.9 itojun 745: struct in6_ifaddr *ia6;
746: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
747: if (ia6)
748: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
749: }
750: #endif
1.2 itojun 751: ip6stat.ip6s_delivered++;
1.9 itojun 752: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 753: nest = 0;
1.40 itojun 754:
1.2 itojun 755: while (nxt != IPPROTO_DONE) {
756: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
757: ip6stat.ip6s_toomanyhdr++;
758: goto bad;
759: }
1.8 itojun 760:
761: /*
762: * protection against faulty packet - there should be
763: * more sanity checks in header chain processing.
764: */
765: if (m->m_pkthdr.len < off) {
766: ip6stat.ip6s_tooshort++;
1.9 itojun 767: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 768: goto bad;
769: }
770:
1.37 itojun 771: #ifdef IPSEC
772: /*
773: * enforce IPsec policy checking if we are seeing last header.
774: * note that we do not visit this with protocols with pcb layer
775: * code - like udp/tcp/raw ip.
776: */
777: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
778: ipsec6_in_reject(m, NULL)) {
779: ipsec6stat.in_polvio++;
780: goto bad;
781: }
782: #endif
1.94 degroote 783: #ifdef FAST_IPSEC
784: /*
785: * enforce IPsec policy checking if we are seeing last header.
786: * note that we do not visit this with protocols with pcb layer
787: * code - like udp/tcp/raw ip.
788: */
789: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
790: /*
791: * Check if the packet has already had IPsec processing
792: * done. If so, then just pass it along. This tag gets
793: * set during AH, ESP, etc. input handling, before the
794: * packet is returned to the ip input queue for delivery.
795: */
796: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
797: s = splsoftnet();
798: if (mtag != NULL) {
799: tdbi = (struct tdb_ident *)(mtag + 1);
800: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
801: } else {
802: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
803: IP_FORWARDING, &error);
804: }
805: if (sp != NULL) {
806: /*
807: * Check security policy against packet attributes.
808: */
809: error = ipsec_in_reject(sp, m);
810: KEY_FREESP(&sp);
811: } else {
812: /* XXX error stat??? */
813: error = EINVAL;
814: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
815: goto bad;
816: }
817: splx(s);
818: if (error)
819: goto bad;
820: }
821: #endif /* FAST_IPSEC */
822:
1.56 itojun 823:
1.2 itojun 824: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
825: }
826: return;
827: bad:
828: m_freem(m);
829: }
830:
831: /*
1.81 rpaulo 832: * set/grab in6_ifaddr correspond to IPv6 destination address.
833: */
834: static struct m_tag *
835: ip6_setdstifaddr(m, ia6)
836: struct mbuf *m;
837: struct in6_ifaddr *ia6;
838: {
839: struct m_tag *mtag;
840:
841: mtag = ip6_addaux(m);
842: if (mtag)
843: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
844: return mtag; /* NULL if failed to set */
845: }
846:
847: struct in6_ifaddr *
848: ip6_getdstifaddr(m)
849: struct mbuf *m;
850: {
851: struct m_tag *mtag;
852:
853: mtag = ip6_findaux(m);
854: if (mtag)
855: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
856: else
857: return NULL;
858: }
859:
860: /*
1.2 itojun 861: * Hop-by-Hop options header processing. If a valid jumbo payload option is
862: * included, the real payload length will be stored in plenp.
863: */
864: static int
865: ip6_hopopts_input(plenp, rtalertp, mp, offp)
866: u_int32_t *plenp;
1.5 itojun 867: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 868: struct mbuf **mp;
869: int *offp;
870: {
1.35 itojun 871: struct mbuf *m = *mp;
1.2 itojun 872: int off = *offp, hbhlen;
873: struct ip6_hbh *hbh;
874:
875: /* validation of the length of the header */
1.9 itojun 876: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
877: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
878: if (hbh == NULL) {
879: ip6stat.ip6s_tooshort++;
880: return -1;
881: }
882: hbhlen = (hbh->ip6h_len + 1) << 3;
883: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
884: hbhlen);
885: if (hbh == NULL) {
886: ip6stat.ip6s_tooshort++;
887: return -1;
888: }
1.57 thorpej 889: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 890: off += hbhlen;
891: hbhlen -= sizeof(struct ip6_hbh);
892:
893: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
894: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 895: return (-1);
1.2 itojun 896:
897: *offp = off;
898: *mp = m;
1.58 itojun 899: return (0);
1.2 itojun 900: }
901:
902: /*
903: * Search header for all Hop-by-hop options and process each option.
904: * This function is separate from ip6_hopopts_input() in order to
905: * handle a case where the sending node itself process its hop-by-hop
906: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 907: *
908: * The function assumes that hbh header is located right after the IPv6 header
909: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
910: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 911: */
912: int
913: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
914: struct mbuf *m;
915: u_int8_t *opthead;
916: int hbhlen;
1.5 itojun 917: u_int32_t *rtalertp;
1.2 itojun 918: u_int32_t *plenp;
919: {
920: struct ip6_hdr *ip6;
921: int optlen = 0;
922: u_int8_t *opt = opthead;
923: u_int16_t rtalert_val;
1.22 itojun 924: u_int32_t jumboplen;
1.55 itojun 925: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 926:
927: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 928: switch (*opt) {
929: case IP6OPT_PAD1:
930: optlen = 1;
931: break;
932: case IP6OPT_PADN:
933: if (hbhlen < IP6OPT_MINLEN) {
934: ip6stat.ip6s_toosmall++;
935: goto bad;
936: }
937: optlen = *(opt + 1) + 2;
938: break;
939: case IP6OPT_RTALERT:
940: /* XXX may need check for alignment */
941: if (hbhlen < IP6OPT_RTALERT_LEN) {
942: ip6stat.ip6s_toosmall++;
943: goto bad;
944: }
945: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 946: /* XXX stat */
947: icmp6_error(m, ICMP6_PARAM_PROB,
948: ICMP6_PARAMPROB_HEADER,
949: erroff + opt + 1 - opthead);
950: return (-1);
1.35 itojun 951: }
952: optlen = IP6OPT_RTALERT_LEN;
1.97 christos 953: bcopy((void *)(opt + 2), (void *)&rtalert_val, 2);
1.35 itojun 954: *rtalertp = ntohs(rtalert_val);
955: break;
956: case IP6OPT_JUMBO:
1.22 itojun 957: /* XXX may need check for alignment */
958: if (hbhlen < IP6OPT_JUMBO_LEN) {
959: ip6stat.ip6s_toosmall++;
960: goto bad;
961: }
1.35 itojun 962: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 963: /* XXX stat */
964: icmp6_error(m, ICMP6_PARAM_PROB,
965: ICMP6_PARAMPROB_HEADER,
966: erroff + opt + 1 - opthead);
967: return (-1);
1.35 itojun 968: }
1.22 itojun 969: optlen = IP6OPT_JUMBO_LEN;
970:
971: /*
972: * IPv6 packets that have non 0 payload length
1.35 itojun 973: * must not contain a jumbo payload option.
1.22 itojun 974: */
975: ip6 = mtod(m, struct ip6_hdr *);
976: if (ip6->ip6_plen) {
977: ip6stat.ip6s_badoptions++;
978: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 979: ICMP6_PARAMPROB_HEADER,
980: erroff + opt - opthead);
981: return (-1);
1.22 itojun 982: }
1.2 itojun 983:
1.22 itojun 984: /*
985: * We may see jumbolen in unaligned location, so
986: * we'd need to perform bcopy().
987: */
988: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
989: jumboplen = (u_int32_t)htonl(jumboplen);
990:
991: #if 1
992: /*
993: * if there are multiple jumbo payload options,
994: * *plenp will be non-zero and the packet will be
995: * rejected.
996: * the behavior may need some debate in ipngwg -
997: * multiple options does not make sense, however,
998: * there's no explicit mention in specification.
999: */
1000: if (*plenp != 0) {
1001: ip6stat.ip6s_badoptions++;
1002: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1003: ICMP6_PARAMPROB_HEADER,
1004: erroff + opt + 2 - opthead);
1005: return (-1);
1.22 itojun 1006: }
1.8 itojun 1007: #endif
1.2 itojun 1008:
1.22 itojun 1009: /*
1010: * jumbo payload length must be larger than 65535.
1011: */
1012: if (jumboplen <= IPV6_MAXPACKET) {
1013: ip6stat.ip6s_badoptions++;
1014: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1015: ICMP6_PARAMPROB_HEADER,
1016: erroff + opt + 2 - opthead);
1017: return (-1);
1.22 itojun 1018: }
1019: *plenp = jumboplen;
1020:
1021: break;
1.35 itojun 1022: default: /* unknown option */
1023: if (hbhlen < IP6OPT_MINLEN) {
1024: ip6stat.ip6s_toosmall++;
1025: goto bad;
1026: }
1.55 itojun 1027: optlen = ip6_unknown_opt(opt, m,
1028: erroff + opt - opthead);
1029: if (optlen == -1)
1030: return (-1);
1.35 itojun 1031: optlen += 2;
1032: break;
1.2 itojun 1033: }
1034: }
1035:
1.55 itojun 1036: return (0);
1.2 itojun 1037:
1038: bad:
1039: m_freem(m);
1.55 itojun 1040: return (-1);
1.2 itojun 1041: }
1042:
1043: /*
1044: * Unknown option processing.
1045: * The third argument `off' is the offset from the IPv6 header to the option,
1046: * which is necessary if the IPv6 header the and option header and IPv6 header
1047: * is not continuous in order to return an ICMPv6 error.
1048: */
1049: int
1050: ip6_unknown_opt(optp, m, off)
1051: u_int8_t *optp;
1052: struct mbuf *m;
1053: int off;
1054: {
1055: struct ip6_hdr *ip6;
1056:
1.35 itojun 1057: switch (IP6OPT_TYPE(*optp)) {
1058: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1059: return ((int)*(optp + 1));
1.35 itojun 1060: case IP6OPT_TYPE_DISCARD: /* silently discard */
1061: m_freem(m);
1.58 itojun 1062: return (-1);
1.35 itojun 1063: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1064: ip6stat.ip6s_badoptions++;
1065: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1066: return (-1);
1.35 itojun 1067: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1068: ip6stat.ip6s_badoptions++;
1069: ip6 = mtod(m, struct ip6_hdr *);
1070: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1071: (m->m_flags & (M_BCAST|M_MCAST)))
1072: m_freem(m);
1073: else
1074: icmp6_error(m, ICMP6_PARAM_PROB,
1075: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1076: return (-1);
1.2 itojun 1077: }
1078:
1079: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1080: return (-1);
1.2 itojun 1081: }
1082:
1083: /*
1.9 itojun 1084: * Create the "control" list for this pcb.
1085: *
1086: * The routine will be called from upper layer handlers like tcp6_input().
1087: * Thus the routine assumes that the caller (tcp6_input) have already
1088: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1089: * very first mbuf on the mbuf chain.
1090: * We may want to add some infinite loop prevention or sanity checks for safety.
1091: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1092: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1093: */
1094: void
1095: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 1096: struct in6pcb *in6p;
1097: struct mbuf **mp;
1098: struct ip6_hdr *ip6;
1099: struct mbuf *m;
1.2 itojun 1100: {
1.85 rpaulo 1101: #ifdef RFC2292
1102: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1103: #else
1104: #define IS2292(x, y) (y)
1105: #endif
1106:
1.9 itojun 1107: #ifdef SO_TIMESTAMP
1.2 itojun 1108: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1109: struct timeval tv;
1110:
1111: microtime(&tv);
1.97 christos 1112: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1113: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1114: if (*mp)
1115: mp = &(*mp)->m_next;
1116: }
1.9 itojun 1117: #endif
1.87 rpaulo 1118:
1119: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1120: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1121: return;
1122:
1.2 itojun 1123: /* RFC 2292 sec. 5 */
1.35 itojun 1124: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1125: struct in6_pktinfo pi6;
1.85 rpaulo 1126:
1.2 itojun 1127: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1128: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1129: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1130: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1131: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1132: sizeof(struct in6_pktinfo),
1133: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1134: if (*mp)
1135: mp = &(*mp)->m_next;
1136: }
1.85 rpaulo 1137:
1.2 itojun 1138: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1139: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1140:
1.97 christos 1141: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1142: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1143: if (*mp)
1144: mp = &(*mp)->m_next;
1145: }
1146:
1147: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1148: u_int32_t flowinfo;
1149: int tclass;
1150:
1151: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1152: flowinfo >>= 20;
1153:
1154: tclass = flowinfo & 0xff;
1.97 christos 1155: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1156: IPV6_TCLASS, IPPROTO_IPV6);
1157:
1.2 itojun 1158: if (*mp)
1159: mp = &(*mp)->m_next;
1160: }
1161:
1162: /*
1.75 itojun 1163: * IPV6_HOPOPTS socket option. Recall that we required super-user
1164: * privilege for the option (see ip6_ctloutput), but it might be too
1165: * strict, since there might be some hop-by-hop options which can be
1166: * returned to normal user.
1.85 rpaulo 1167: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1168: */
1.75 itojun 1169: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1170: /*
1171: * Check if a hop-by-hop options header is contatined in the
1172: * received packet, and if so, store the options as ancillary
1173: * data. Note that a hop-by-hop options header must be
1174: * just after the IPv6 header, which fact is assured through
1175: * the IPv6 input processing.
1176: */
1.78 christos 1177: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1178: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1179: struct ip6_hbh *hbh;
1180: int hbhlen;
1.62 itojun 1181: struct mbuf *ext;
1.9 itojun 1182:
1.62 itojun 1183: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1184: xip6->ip6_nxt);
1.62 itojun 1185: if (ext == NULL) {
1.9 itojun 1186: ip6stat.ip6s_tooshort++;
1187: return;
1188: }
1.62 itojun 1189: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1190: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1191: if (hbhlen != ext->m_len) {
1192: m_freem(ext);
1.9 itojun 1193: ip6stat.ip6s_tooshort++;
1194: return;
1195: }
1.2 itojun 1196:
1197: /*
1198: * XXX: We copy whole the header even if a jumbo
1199: * payload option is included, which option is to
1200: * be removed before returning in the RFC 2292.
1.85 rpaulo 1201: * Note: this constraint is removed in RFC3542.
1.2 itojun 1202: */
1.97 christos 1203: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1204: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1205: IPPROTO_IPV6);
1.2 itojun 1206: if (*mp)
1207: mp = &(*mp)->m_next;
1.62 itojun 1208: m_freem(ext);
1.2 itojun 1209: }
1210: }
1211:
1212: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1213: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1214: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1215: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1216:
1217: /*
1218: * Search for destination options headers or routing
1219: * header(s) through the header chain, and stores each
1220: * header as ancillary data.
1221: * Note that the order of the headers remains in
1222: * the chain of ancillary data.
1223: */
1.86 rpaulo 1224: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1225: struct ip6_ext *ip6e = NULL;
1.9 itojun 1226: int elen;
1.62 itojun 1227: struct mbuf *ext = NULL;
1.9 itojun 1228:
1.62 itojun 1229: /*
1230: * if it is not an extension header, don't try to
1231: * pull it from the chain.
1232: */
1233: switch (nxt) {
1234: case IPPROTO_DSTOPTS:
1235: case IPPROTO_ROUTING:
1236: case IPPROTO_HOPOPTS:
1237: case IPPROTO_AH: /* is it possible? */
1238: break;
1239: default:
1240: goto loopend;
1241: }
1242:
1243: ext = ip6_pullexthdr(m, off, nxt);
1244: if (ext == NULL) {
1.9 itojun 1245: ip6stat.ip6s_tooshort++;
1246: return;
1247: }
1.62 itojun 1248: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1249: if (nxt == IPPROTO_AH)
1250: elen = (ip6e->ip6e_len + 2) << 2;
1251: else
1252: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1253: if (elen != ext->m_len) {
1254: m_freem(ext);
1.9 itojun 1255: ip6stat.ip6s_tooshort++;
1256: return;
1257: }
1.57 thorpej 1258: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1259:
1.35 itojun 1260: switch (nxt) {
1.62 itojun 1261: case IPPROTO_DSTOPTS:
1.35 itojun 1262: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1263: break;
1264:
1.97 christos 1265: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1266: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1267: IPPROTO_IPV6);
1.35 itojun 1268: if (*mp)
1269: mp = &(*mp)->m_next;
1270: break;
1271:
1272: case IPPROTO_ROUTING:
1273: if (!in6p->in6p_flags & IN6P_RTHDR)
1274: break;
1275:
1.97 christos 1276: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1277: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1278: IPPROTO_IPV6);
1.35 itojun 1279: if (*mp)
1280: mp = &(*mp)->m_next;
1281: break;
1282:
1.62 itojun 1283: case IPPROTO_HOPOPTS:
1284: case IPPROTO_AH: /* is it possible? */
1285: break;
1286:
1.35 itojun 1287: default:
1288: /*
1.62 itojun 1289: * other cases have been filtered in the above.
1290: * none will visit this case. here we supply
1291: * the code just in case (nxt overwritten or
1292: * other cases).
1.35 itojun 1293: */
1.62 itojun 1294: m_freem(ext);
1.35 itojun 1295: goto loopend;
1296:
1.2 itojun 1297: }
1298:
1299: /* proceed with the next header. */
1.9 itojun 1300: off += elen;
1.2 itojun 1301: nxt = ip6e->ip6e_nxt;
1.62 itojun 1302: ip6e = NULL;
1303: m_freem(ext);
1304: ext = NULL;
1.2 itojun 1305: }
1306: loopend:
1.62 itojun 1307: ;
1.2 itojun 1308: }
1.62 itojun 1309: }
1.85 rpaulo 1310: #undef IS2292
1311:
1312:
1313: void
1.95 dyoung 1314: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1315: uint32_t *mtu)
1.85 rpaulo 1316: {
1317: struct socket *so;
1318: struct mbuf *m_mtu;
1319: struct ip6_mtuinfo mtuctl;
1320:
1321: so = in6p->in6p_socket;
1322:
1323: if (mtu == NULL)
1324: return;
1325:
1326: #ifdef DIAGNOSTIC
1327: if (so == NULL) /* I believe this is impossible */
1328: panic("ip6_notify_pmtu: socket is NULL");
1329: #endif
1330:
1331: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1332: mtuctl.ip6m_mtu = *mtu;
1333: mtuctl.ip6m_addr = *dst;
1334: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1335: return;
1336:
1.97 christos 1337: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1338: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1339: return;
1340:
1.95 dyoung 1341: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1342: == 0) {
1343: m_freem(m_mtu);
1344: /* XXX: should count statistics */
1345: } else
1346: sorwakeup(so);
1347:
1348: return;
1349: }
1.62 itojun 1350:
1351: /*
1352: * pull single extension header from mbuf chain. returns single mbuf that
1353: * contains the result, or NULL on error.
1354: */
1355: static struct mbuf *
1356: ip6_pullexthdr(m, off, nxt)
1357: struct mbuf *m;
1358: size_t off;
1359: int nxt;
1360: {
1361: struct ip6_ext ip6e;
1362: size_t elen;
1363: struct mbuf *n;
1364:
1365: #ifdef DIAGNOSTIC
1366: switch (nxt) {
1367: case IPPROTO_DSTOPTS:
1368: case IPPROTO_ROUTING:
1369: case IPPROTO_HOPOPTS:
1370: case IPPROTO_AH: /* is it possible? */
1371: break;
1372: default:
1373: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1374: }
1.62 itojun 1375: #endif
1.2 itojun 1376:
1.97 christos 1377: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1378: if (nxt == IPPROTO_AH)
1379: elen = (ip6e.ip6e_len + 2) << 2;
1380: else
1381: elen = (ip6e.ip6e_len + 1) << 3;
1382:
1383: MGET(n, M_DONTWAIT, MT_DATA);
1384: if (n && elen >= MLEN) {
1385: MCLGET(n, M_DONTWAIT);
1386: if ((n->m_flags & M_EXT) == 0) {
1387: m_free(n);
1388: n = NULL;
1389: }
1390: }
1391: if (!n)
1392: return NULL;
1393:
1394: n->m_len = 0;
1395: if (elen >= M_TRAILINGSPACE(n)) {
1396: m_free(n);
1397: return NULL;
1398: }
1399:
1.97 christos 1400: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1401: n->m_len = elen;
1402: return n;
1.2 itojun 1403: }
1404:
1405: /*
1406: * Get pointer to the previous header followed by the header
1407: * currently processed.
1408: * XXX: This function supposes that
1409: * M includes all headers,
1410: * the next header field and the header length field of each header
1411: * are valid, and
1412: * the sum of each header length equals to OFF.
1413: * Because of these assumptions, this function must be called very
1414: * carefully. Moreover, it will not be used in the near future when
1415: * we develop `neater' mechanism to process extension headers.
1416: */
1.58 itojun 1417: u_int8_t *
1.2 itojun 1418: ip6_get_prevhdr(m, off)
1419: struct mbuf *m;
1420: int off;
1421: {
1422: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1423:
1424: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1425: return (&ip6->ip6_nxt);
1.2 itojun 1426: else {
1427: int len, nxt;
1428: struct ip6_ext *ip6e = NULL;
1429:
1430: nxt = ip6->ip6_nxt;
1431: len = sizeof(struct ip6_hdr);
1432: while (len < off) {
1.97 christos 1433: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1434:
1.35 itojun 1435: switch (nxt) {
1.2 itojun 1436: case IPPROTO_FRAGMENT:
1437: len += sizeof(struct ip6_frag);
1438: break;
1439: case IPPROTO_AH:
1440: len += (ip6e->ip6e_len + 2) << 2;
1441: break;
1442: default:
1443: len += (ip6e->ip6e_len + 1) << 3;
1444: break;
1445: }
1446: nxt = ip6e->ip6e_nxt;
1447: }
1448: if (ip6e)
1.58 itojun 1449: return (&ip6e->ip6e_nxt);
1.2 itojun 1450: else
1451: return NULL;
1.18 itojun 1452: }
1453: }
1454:
1455: /*
1456: * get next header offset. m will be retained.
1457: */
1458: int
1459: ip6_nexthdr(m, off, proto, nxtp)
1460: struct mbuf *m;
1461: int off;
1462: int proto;
1463: int *nxtp;
1464: {
1465: struct ip6_hdr ip6;
1466: struct ip6_ext ip6e;
1467: struct ip6_frag fh;
1468:
1469: /* just in case */
1470: if (m == NULL)
1471: panic("ip6_nexthdr: m == NULL");
1472: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1473: return -1;
1474:
1475: switch (proto) {
1476: case IPPROTO_IPV6:
1.83 rpaulo 1477: /* do not chase beyond intermediate IPv6 headers */
1478: if (off != 0)
1479: return -1;
1.18 itojun 1480: if (m->m_pkthdr.len < off + sizeof(ip6))
1481: return -1;
1.97 christos 1482: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1483: if (nxtp)
1484: *nxtp = ip6.ip6_nxt;
1485: off += sizeof(ip6);
1486: return off;
1487:
1488: case IPPROTO_FRAGMENT:
1489: /*
1490: * terminate parsing if it is not the first fragment,
1491: * it does not make sense to parse through it.
1492: */
1493: if (m->m_pkthdr.len < off + sizeof(fh))
1494: return -1;
1.97 christos 1495: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1496: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1497: return -1;
1498: if (nxtp)
1499: *nxtp = fh.ip6f_nxt;
1500: off += sizeof(struct ip6_frag);
1501: return off;
1502:
1503: case IPPROTO_AH:
1504: if (m->m_pkthdr.len < off + sizeof(ip6e))
1505: return -1;
1.97 christos 1506: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1507: if (nxtp)
1508: *nxtp = ip6e.ip6e_nxt;
1509: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1510: if (m->m_pkthdr.len < off)
1511: return -1;
1.18 itojun 1512: return off;
1513:
1514: case IPPROTO_HOPOPTS:
1515: case IPPROTO_ROUTING:
1516: case IPPROTO_DSTOPTS:
1517: if (m->m_pkthdr.len < off + sizeof(ip6e))
1518: return -1;
1.97 christos 1519: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1520: if (nxtp)
1521: *nxtp = ip6e.ip6e_nxt;
1522: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1523: if (m->m_pkthdr.len < off)
1524: return -1;
1.18 itojun 1525: return off;
1526:
1527: case IPPROTO_NONE:
1528: case IPPROTO_ESP:
1529: case IPPROTO_IPCOMP:
1530: /* give up */
1531: return -1;
1532:
1533: default:
1534: return -1;
1535: }
1536: }
1537:
1538: /*
1539: * get offset for the last header in the chain. m will be kept untainted.
1540: */
1541: int
1542: ip6_lasthdr(m, off, proto, nxtp)
1543: struct mbuf *m;
1544: int off;
1545: int proto;
1546: int *nxtp;
1547: {
1548: int newoff;
1549: int nxt;
1550:
1551: if (!nxtp) {
1552: nxt = -1;
1553: nxtp = &nxt;
1554: }
1.86 rpaulo 1555: for (;;) {
1.18 itojun 1556: newoff = ip6_nexthdr(m, off, proto, nxtp);
1557: if (newoff < 0)
1558: return off;
1559: else if (newoff < off)
1560: return -1; /* invalid */
1561: else if (newoff == off)
1562: return newoff;
1563:
1564: off = newoff;
1565: proto = *nxtp;
1.2 itojun 1566: }
1567: }
1568:
1.81 rpaulo 1569: struct m_tag *
1570: ip6_addaux(m)
1571: struct mbuf *m;
1572: {
1573: struct m_tag *mtag;
1574:
1575: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1576: if (!mtag) {
1577: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1578: M_NOWAIT);
1579: if (mtag) {
1580: m_tag_prepend(m, mtag);
1581: bzero(mtag + 1, sizeof(struct ip6aux));
1582: }
1583: }
1584: return mtag;
1585: }
1586:
1587: struct m_tag *
1588: ip6_findaux(m)
1589: struct mbuf *m;
1590: {
1591: struct m_tag *mtag;
1592:
1593: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1594: return mtag;
1595: }
1596:
1597: void
1598: ip6_delaux(m)
1599: struct mbuf *m;
1600: {
1601: struct m_tag *mtag;
1602:
1603: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1604: if (mtag)
1605: m_tag_delete(m, mtag);
1606: }
1607:
1.98 ! liamjfoy 1608: #ifdef GATEWAY
! 1609: /*
! 1610: * sysctl helper routine for net.inet.ip6.maxflows. Since
! 1611: * we could reduce this value, call ip6flow_reap();
! 1612: */
! 1613: static int
! 1614: sysctl_net_inet_ip6_maxflows(SYSCTLFN_ARGS)
! 1615: {
! 1616: int s;
! 1617:
! 1618: s = sysctl_lookup(SYSCTLFN_CALL(rnode));
! 1619: if (s)
! 1620: return (s);
! 1621:
! 1622: s = splsoftnet();
! 1623: ip6flow_reap(0);
! 1624: splx(s);
! 1625:
! 1626: return (0);
! 1627: }
! 1628: #endif /* GATEWAY */
! 1629:
1.2 itojun 1630: /*
1631: * System control for IP6
1632: */
1633:
1634: u_char inet6ctlerrmap[PRC_NCMDS] = {
1635: 0, 0, 0, 0,
1636: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1637: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1638: EMSGSIZE, EHOSTUNREACH, 0, 0,
1639: 0, 0, 0, 0,
1640: ENOPROTOOPT
1641: };
1642:
1.70 atatat 1643: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1644: {
1.85 rpaulo 1645: #ifdef RFC2292
1646: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1647: #else
1648: #define IS2292(x, y) (y)
1649: #endif
1.26 itojun 1650:
1.73 atatat 1651: sysctl_createv(clog, 0, NULL, NULL,
1652: CTLFLAG_PERMANENT,
1.70 atatat 1653: CTLTYPE_NODE, "net", NULL,
1654: NULL, 0, NULL, 0,
1655: CTL_NET, CTL_EOL);
1.73 atatat 1656: sysctl_createv(clog, 0, NULL, NULL,
1657: CTLFLAG_PERMANENT,
1.74 atatat 1658: CTLTYPE_NODE, "inet6",
1659: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1660: NULL, 0, NULL, 0,
1661: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1662: sysctl_createv(clog, 0, NULL, NULL,
1663: CTLFLAG_PERMANENT,
1.74 atatat 1664: CTLTYPE_NODE, "ip6",
1665: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1666: NULL, 0, NULL, 0,
1667: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1668:
1.73 atatat 1669: sysctl_createv(clog, 0, NULL, NULL,
1670: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1671: CTLTYPE_INT, "forwarding",
1672: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1673: NULL, 0, &ip6_forwarding, 0,
1674: CTL_NET, PF_INET6, IPPROTO_IPV6,
1675: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1676: sysctl_createv(clog, 0, NULL, NULL,
1677: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1678: CTLTYPE_INT, "redirect",
1679: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1680: NULL, 0, &ip6_sendredirects, 0,
1681: CTL_NET, PF_INET6, IPPROTO_IPV6,
1682: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1683: sysctl_createv(clog, 0, NULL, NULL,
1684: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1685: CTLTYPE_INT, "hlim",
1686: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1687: NULL, 0, &ip6_defhlim, 0,
1688: CTL_NET, PF_INET6, IPPROTO_IPV6,
1689: IPV6CTL_DEFHLIM, CTL_EOL);
1690: #ifdef notyet
1.73 atatat 1691: sysctl_createv(clog, 0, NULL, NULL,
1692: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1693: CTLTYPE_INT, "mtu", NULL,
1694: NULL, 0, &, 0,
1695: CTL_NET, PF_INET6, IPPROTO_IPV6,
1696: IPV6CTL_DEFMTU, CTL_EOL);
1697: #endif
1698: #ifdef __no_idea__
1.73 atatat 1699: sysctl_createv(clog, 0, NULL, NULL,
1700: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1701: CTLTYPE_INT, "forwsrcrt", NULL,
1702: NULL, 0, &?, 0,
1703: CTL_NET, PF_INET6, IPPROTO_IPV6,
1704: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1705: sysctl_createv(clog, 0, NULL, NULL,
1706: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1707: CTLTYPE_STRUCT, "mrtstats", NULL,
1708: NULL, 0, &?, sizeof(?),
1709: CTL_NET, PF_INET6, IPPROTO_IPV6,
1710: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1711: sysctl_createv(clog, 0, NULL, NULL,
1712: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1713: CTLTYPE_?, "mrtproto", NULL,
1714: NULL, 0, &?, sizeof(?),
1715: CTL_NET, PF_INET6, IPPROTO_IPV6,
1716: IPV6CTL_MRTPROTO, CTL_EOL);
1717: #endif
1.73 atatat 1718: sysctl_createv(clog, 0, NULL, NULL,
1719: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1720: CTLTYPE_INT, "maxfragpackets",
1721: SYSCTL_DESCR("Maximum number of fragments to buffer "
1722: "for reassembly"),
1.70 atatat 1723: NULL, 0, &ip6_maxfragpackets, 0,
1724: CTL_NET, PF_INET6, IPPROTO_IPV6,
1725: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1726: #ifdef __no_idea__
1.73 atatat 1727: sysctl_createv(clog, 0, NULL, NULL,
1728: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1729: CTLTYPE_INT, "sourcecheck", NULL,
1730: NULL, 0, &?, 0,
1731: CTL_NET, PF_INET6, IPPROTO_IPV6,
1732: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1733: sysctl_createv(clog, 0, NULL, NULL,
1734: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1735: CTLTYPE_INT, "sourcecheck_logint", NULL,
1736: NULL, 0, &?, 0,
1737: CTL_NET, PF_INET6, IPPROTO_IPV6,
1738: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1739: #endif
1.73 atatat 1740: sysctl_createv(clog, 0, NULL, NULL,
1741: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1742: CTLTYPE_INT, "accept_rtadv",
1743: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1744: NULL, 0, &ip6_accept_rtadv, 0,
1745: CTL_NET, PF_INET6, IPPROTO_IPV6,
1746: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1747: sysctl_createv(clog, 0, NULL, NULL,
1748: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1749: CTLTYPE_INT, "keepfaith",
1750: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1751: NULL, 0, &ip6_keepfaith, 0,
1752: CTL_NET, PF_INET6, IPPROTO_IPV6,
1753: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1754: sysctl_createv(clog, 0, NULL, NULL,
1755: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1756: CTLTYPE_INT, "log_interval",
1757: SYSCTL_DESCR("Minumum interval between logging "
1758: "unroutable packets"),
1.70 atatat 1759: NULL, 0, &ip6_log_interval, 0,
1760: CTL_NET, PF_INET6, IPPROTO_IPV6,
1761: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1762: sysctl_createv(clog, 0, NULL, NULL,
1763: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1764: CTLTYPE_INT, "hdrnestlimit",
1765: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1766: NULL, 0, &ip6_hdrnestlimit, 0,
1767: CTL_NET, PF_INET6, IPPROTO_IPV6,
1768: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1769: sysctl_createv(clog, 0, NULL, NULL,
1770: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1771: CTLTYPE_INT, "dad_count",
1772: SYSCTL_DESCR("Number of Duplicate Address Detection "
1773: "probes to send"),
1.70 atatat 1774: NULL, 0, &ip6_dad_count, 0,
1775: CTL_NET, PF_INET6, IPPROTO_IPV6,
1776: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1777: sysctl_createv(clog, 0, NULL, NULL,
1778: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1779: CTLTYPE_INT, "auto_flowlabel",
1780: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1781: NULL, 0, &ip6_auto_flowlabel, 0,
1782: CTL_NET, PF_INET6, IPPROTO_IPV6,
1783: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1784: sysctl_createv(clog, 0, NULL, NULL,
1785: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1786: CTLTYPE_INT, "defmcasthlim",
1787: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1788: NULL, 0, &ip6_defmcasthlim, 0,
1789: CTL_NET, PF_INET6, IPPROTO_IPV6,
1790: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1791: #if NGIF > 0
1.73 atatat 1792: sysctl_createv(clog, 0, NULL, NULL,
1793: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1794: CTLTYPE_INT, "gifhlim",
1795: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1796: NULL, 0, &ip6_gif_hlim, 0,
1797: CTL_NET, PF_INET6, IPPROTO_IPV6,
1798: IPV6CTL_GIF_HLIM, CTL_EOL);
1799: #endif /* NGIF */
1.73 atatat 1800: sysctl_createv(clog, 0, NULL, NULL,
1801: CTLFLAG_PERMANENT,
1.74 atatat 1802: CTLTYPE_STRING, "kame_version",
1803: SYSCTL_DESCR("KAME Version"),
1.78 christos 1804: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1805: CTL_NET, PF_INET6, IPPROTO_IPV6,
1806: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1807: sysctl_createv(clog, 0, NULL, NULL,
1808: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1809: CTLTYPE_INT, "use_deprecated",
1810: SYSCTL_DESCR("Allow use of deprecated addresses as "
1811: "source addresses"),
1.70 atatat 1812: NULL, 0, &ip6_use_deprecated, 0,
1813: CTL_NET, PF_INET6, IPPROTO_IPV6,
1814: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1815: sysctl_createv(clog, 0, NULL, NULL,
1816: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1817: CTLTYPE_INT, "rr_prune", NULL,
1818: NULL, 0, &ip6_rr_prune, 0,
1819: CTL_NET, PF_INET6, IPPROTO_IPV6,
1820: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1821: sysctl_createv(clog, 0, NULL, NULL,
1822: CTLFLAG_PERMANENT
1.70 atatat 1823: #ifndef INET6_BINDV6ONLY
1.73 atatat 1824: |CTLFLAG_READWRITE,
1.70 atatat 1825: #endif
1.74 atatat 1826: CTLTYPE_INT, "v6only",
1827: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1828: "to PF_INET sockets"),
1.70 atatat 1829: NULL, 0, &ip6_v6only, 0,
1830: CTL_NET, PF_INET6, IPPROTO_IPV6,
1831: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1832: sysctl_createv(clog, 0, NULL, NULL,
1833: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1834: CTLTYPE_INT, "anonportmin",
1835: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1836: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1837: CTL_NET, PF_INET6, IPPROTO_IPV6,
1838: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1839: sysctl_createv(clog, 0, NULL, NULL,
1840: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1841: CTLTYPE_INT, "anonportmax",
1842: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1843: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1844: CTL_NET, PF_INET6, IPPROTO_IPV6,
1845: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1846: #ifndef IPNOPRIVPORTS
1.73 atatat 1847: sysctl_createv(clog, 0, NULL, NULL,
1848: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1849: CTLTYPE_INT, "lowportmin",
1850: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1851: "to assign"),
1.70 atatat 1852: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1853: CTL_NET, PF_INET6, IPPROTO_IPV6,
1854: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1855: sysctl_createv(clog, 0, NULL, NULL,
1856: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1857: CTLTYPE_INT, "lowportmax",
1858: SYSCTL_DESCR("Highest privileged ephemeral port number "
1859: "to assign"),
1.70 atatat 1860: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1861: CTL_NET, PF_INET6, IPPROTO_IPV6,
1862: IPV6CTL_LOWPORTMAX, CTL_EOL);
1863: #endif /* IPNOPRIVPORTS */
1.73 atatat 1864: sysctl_createv(clog, 0, NULL, NULL,
1865: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1866: CTLTYPE_INT, "use_tempaddr",
1867: SYSCTL_DESCR("Use temporary address"),
1868: NULL, 0, &ip6_use_tempaddr, 0,
1869: CTL_NET, PF_INET6, IPPROTO_IPV6,
1870: CTL_CREATE, CTL_EOL);
1871: sysctl_createv(clog, 0, NULL, NULL,
1872: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1873: CTLTYPE_INT, "temppltime",
1874: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1875: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1876: CTL_NET, PF_INET6, IPPROTO_IPV6,
1877: CTL_CREATE, CTL_EOL);
1878: sysctl_createv(clog, 0, NULL, NULL,
1879: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1880: CTLTYPE_INT, "tempvltime",
1881: SYSCTL_DESCR("valid lifetime of a temporary address"),
1882: NULL, 0, &ip6_temp_valid_lifetime, 0,
1883: CTL_NET, PF_INET6, IPPROTO_IPV6,
1884: CTL_CREATE, CTL_EOL);
1885: sysctl_createv(clog, 0, NULL, NULL,
1886: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1887: CTLTYPE_INT, "maxfrags",
1888: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1889: NULL, 0, &ip6_maxfrags, 0,
1890: CTL_NET, PF_INET6, IPPROTO_IPV6,
1891: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1892: sysctl_createv(clog, 0, NULL, NULL,
1893: CTLFLAG_PERMANENT,
1894: CTLTYPE_STRUCT, "stats",
1895: SYSCTL_DESCR("IPv6 statistics"),
1896: NULL, 0, &ip6stat, sizeof(ip6stat),
1897: CTL_NET, PF_INET6, IPPROTO_IPV6,
1898: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1899: sysctl_createv(clog, 0, NULL, NULL,
1900: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1901: CTLTYPE_INT, "use_defaultzone",
1902: SYSCTL_DESCR("Whether to use the default scope zones"),
1903: NULL, 0, &ip6_use_defzone, 0,
1904: CTL_NET, PF_INET6, IPPROTO_IPV6,
1905: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1906: sysctl_createv(clog, 0, NULL, NULL,
1907: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1908: CTLTYPE_INT, "mcast_pmtu",
1909: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1910: NULL, 0, &ip6_mcast_pmtu, 0,
1911: CTL_NET, PF_INET6, IPPROTO_IPV6,
1912: CTL_CREATE, CTL_EOL);
1.98 ! liamjfoy 1913: #ifdef GATEWAY
! 1914: sysctl_createv(clog, 0, NULL, NULL,
! 1915: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1916: CTLTYPE_INT, "maxflows",
! 1917: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
! 1918: sysctl_net_inet_ip6_maxflows, 0, &ip6_maxflows, 0,
! 1919: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1920: CTL_CREATE, CTL_EOL);
! 1921: #endif
1.2 itojun 1922: }
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