Annotation of src/sys/netinet6/ip6_input.c, Revision 1.95
1.95 ! dyoung 1: /* $NetBSD: ip6_input.c,v 1.94 2007/02/10 09:43:05 degroote 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>
1.95 ! dyoung 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.94 2007/02/10 09:43:05 degroote 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);
1.29 thorpej 185:
186: #ifdef PFIL_HOOKS
187: /* Register our Packet Filter hook. */
1.33 thorpej 188: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
189: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 190: i = pfil_head_register(&inet6_pfil_hook);
191: if (i != 0)
192: printf("ip6_init: WARNING: unable to register pfil hook, "
193: "error %d\n", i);
194: #endif /* PFIL_HOOKS */
1.2 itojun 195: }
196:
197: static void
1.90 christos 198: ip6_init2(void *dummy)
1.2 itojun 199: {
200:
201: /* nd6_timer_init */
1.19 thorpej 202: callout_init(&nd6_timer_ch);
203: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83 rpaulo 204:
205: /* timer for regeneranation of temporary addresses randomize ID */
206: callout_init(&in6_tmpaddrtimer_ch);
207: callout_reset(&in6_tmpaddrtimer_ch,
208: (ip6_temp_preferred_lifetime - ip6_desync_factor -
209: ip6_temp_regen_advance) * hz,
210: in6_tmpaddrtimer, NULL);
1.2 itojun 211: }
212:
213: /*
214: * IP6 input interrupt handling. Just pass the packet to ip6_input.
215: */
216: void
217: ip6intr()
218: {
219: int s;
220: struct mbuf *m;
221:
222: for (;;) {
1.41 thorpej 223: s = splnet();
1.2 itojun 224: IF_DEQUEUE(&ip6intrq, m);
225: splx(s);
226: if (m == 0)
227: return;
1.83 rpaulo 228: /* drop the packet if IPv6 operation is disabled on the IF */
229: if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {
230: m_freem(m);
231: return;
232: }
1.2 itojun 233: ip6_input(m);
234: }
235: }
236:
237: extern struct route_in6 ip6_forward_rt;
238:
239: void
240: ip6_input(m)
241: struct mbuf *m;
242: {
1.9 itojun 243: struct ip6_hdr *ip6;
1.2 itojun 244: int off = sizeof(struct ip6_hdr), nest;
245: u_int32_t plen;
1.5 itojun 246: u_int32_t rtalert = ~0;
1.2 itojun 247: int nxt, ours = 0;
1.9 itojun 248: struct ifnet *deliverifp = NULL;
1.64 itojun 249: int srcrt = 0;
1.94 degroote 250: #ifdef FAST_IPSEC
251: struct m_tag *mtag;
252: struct tdb_ident *tdbi;
253: struct secpolicy *sp;
254: int s, error;
255: #endif
1.2 itojun 256:
257: #ifdef IPSEC
258: /*
259: * should the inner packet be considered authentic?
260: * see comment in ah4_input().
261: */
1.49 itojun 262: m->m_flags &= ~M_AUTHIPHDR;
263: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 264: #endif
1.9 itojun 265:
1.2 itojun 266: /*
1.81 rpaulo 267: * make sure we don't have onion peering information into m_tag.
268: */
269: ip6_delaux(m);
270:
271: /*
1.44 itojun 272: * mbuf statistics
1.2 itojun 273: */
274: if (m->m_flags & M_EXT) {
275: if (m->m_next)
276: ip6stat.ip6s_mext2m++;
277: else
278: ip6stat.ip6s_mext1++;
279: } else {
1.40 itojun 280: #define M2MMAX (sizeof(ip6stat.ip6s_m2m)/sizeof(ip6stat.ip6s_m2m[0]))
1.2 itojun 281: if (m->m_next) {
1.9 itojun 282: if (m->m_flags & M_LOOP) {
1.77 peter 283: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 284: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 285: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
286: else
287: ip6stat.ip6s_m2m[0]++;
288: } else
289: ip6stat.ip6s_m1++;
1.40 itojun 290: #undef M2MMAX
1.2 itojun 291: }
292:
1.9 itojun 293: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
294: ip6stat.ip6s_total++;
295:
1.57 thorpej 296: /*
297: * If the IPv6 header is not aligned, slurp it up into a new
298: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 299: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 300: * IPv6 header is in the first mbuf of the chain.
301: */
302: if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
303: struct ifnet *inifp = m->m_pkthdr.rcvif;
304: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
305: (max_linkhdr + 3) & ~3)) == NULL) {
306: /* XXXJRT new stat, please */
307: ip6stat.ip6s_toosmall++;
308: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
309: return;
310: }
311: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
312: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 313: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 314: ip6stat.ip6s_toosmall++;
315: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
316: return;
317: }
1.2 itojun 318: }
319:
320: ip6 = mtod(m, struct ip6_hdr *);
321:
322: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
323: ip6stat.ip6s_badvers++;
1.9 itojun 324: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 325: goto bad;
326: }
1.15 darrenr 327:
328: #ifdef PFIL_HOOKS
329: /*
330: * Run through list of hooks for input packets. If there are any
331: * filters which require that additional packets in the flow are
332: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
333: * Note that filters must _never_ set this flag, as another filter
334: * in the list may have previously cleared it.
335: */
1.39 itojun 336: /*
337: * let ipfilter look at packet on the wire,
338: * not the decapsulated packet.
339: */
340: #ifdef IPSEC
1.42 itojun 341: if (!ipsec_getnhist(m))
1.94 degroote 342: #elif defined(FAST_IPSEC)
343: if (!ipsec_indone(m))
1.39 itojun 344: #else
345: if (1)
346: #endif
347: {
1.64 itojun 348: struct in6_addr odst;
349:
350: odst = ip6->ip6_dst;
1.39 itojun 351: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
352: PFIL_IN) != 0)
353: return;
354: if (m == NULL)
355: return;
356: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 357: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 358: }
1.15 darrenr 359: #endif /* PFIL_HOOKS */
360:
1.2 itojun 361: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
362:
1.30 thorpej 363: #ifdef ALTQ
364: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
365: /* packet is dropped by traffic conditioner */
366: return;
1.9 itojun 367: }
368: #endif
369:
1.2 itojun 370: /*
1.44 itojun 371: * Check against address spoofing/corruption.
1.2 itojun 372: */
373: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
374: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 375: /*
376: * XXX: "badscope" is not very suitable for a multicast source.
377: */
1.2 itojun 378: ip6stat.ip6s_badscope++;
1.9 itojun 379: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 380: goto bad;
381: }
1.13 itojun 382: /*
1.44 itojun 383: * The following check is not documented in specs. A malicious
384: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
385: * and bypass security checks (act as if it was from 127.0.0.1 by using
386: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 387: *
1.44 itojun 388: * This check chokes if we are in an SIIT cloud. As none of BSDs
389: * support IPv4-less kernel compilation, we cannot support SIIT
390: * environment at all. So, it makes more sense for us to reject any
391: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 392: * partial support for SIIT environment.
1.13 itojun 393: */
394: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
395: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
396: ip6stat.ip6s_badscope++;
397: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
398: goto bad;
399: }
1.17 itojun 400: #if 0
1.13 itojun 401: /*
1.17 itojun 402: * Reject packets with IPv4 compatible addresses (auto tunnel).
403: *
404: * The code forbids auto tunnel relay case in RFC1933 (the check is
405: * stronger than RFC1933). We may want to re-enable it if mech-xx
406: * is revised to forbid relaying case.
1.13 itojun 407: */
408: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
409: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
410: ip6stat.ip6s_badscope++;
411: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
412: goto bad;
413: }
414: #endif
1.35 itojun 415:
1.2 itojun 416: /*
1.82 yamt 417: * Disambiguate address scope zones (if there is ambiguity).
418: * We first make sure that the original source or destination address
419: * is not in our internal form for scoped addresses. Such addresses
420: * are not necessarily invalid spec-wise, but we cannot accept them due
421: * to the usage conflict.
422: * in6_setscope() then also checks and rejects the cases where src or
423: * dst are the loopback address and the receiving interface
424: * is not loopback.
425: */
1.88 bouyer 426: if (__predict_false(
427: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
428: goto bad;
429: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 430: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
431: ip6stat.ip6s_badscope++; /* XXX */
432: goto bad;
433: }
434: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
435: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
436: ip6stat.ip6s_badscope++;
437: goto bad;
438: }
439:
440: /*
1.2 itojun 441: * Multicast check
442: */
443: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
444: struct in6_multi *in6m = 0;
1.9 itojun 445:
446: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 447: /*
448: * See if we belong to the destination multicast group on the
449: * arrival interface.
450: */
451: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
452: if (in6m)
453: ours = 1;
454: else if (!ip6_mrouter) {
455: ip6stat.ip6s_notmember++;
456: ip6stat.ip6s_cantforward++;
1.9 itojun 457: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 458: goto bad;
459: }
1.9 itojun 460: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 461: goto hbhcheck;
462: }
463:
464: /*
465: * Unicast check
466: */
1.93 joerg 467: if (!IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.95 ! dyoung 468: &((const struct sockaddr_in6 *)rtcache_getdst((const struct route *)&ip6_forward_rt))->sin6_addr))
1.93 joerg 469: rtcache_free((struct route *)&ip6_forward_rt);
470: else
471: rtcache_check((struct route *)&ip6_forward_rt);
472: if (ip6_forward_rt.ro_rt != NULL) {
473: /* XXX Revalidated route is accounted wrongly. */
1.25 itojun 474: ip6stat.ip6s_forward_cachehit++;
1.93 joerg 475: } else {
1.35 itojun 476: struct sockaddr_in6 *dst6;
477:
1.93 joerg 478: ip6stat.ip6s_forward_cachemiss++;
1.22 itojun 479:
1.95 ! dyoung 480: dst6 = &ip6_forward_rt.ro_dst;
! 481: memset(dst6, 0, sizeof(*dst6));
1.35 itojun 482: dst6->sin6_len = sizeof(struct sockaddr_in6);
483: dst6->sin6_family = AF_INET6;
484: dst6->sin6_addr = ip6->ip6_dst;
1.2 itojun 485:
1.93 joerg 486: rtcache_init((struct route *)&ip6_forward_rt);
1.2 itojun 487: }
488:
489: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
490:
491: /*
492: * Accept the packet if the forwarding interface to the destination
493: * according to the routing table is the loopback interface,
494: * unless the associated route has a gateway.
495: * Note that this approach causes to accept a packet if there is a
496: * route to the loopback interface for the destination of the packet.
497: * But we think it's even useful in some situations, e.g. when using
498: * a special daemon which wants to intercept the packet.
499: */
1.91 dyoung 500: if (ip6_forward_rt.ro_rt != NULL &&
1.2 itojun 501: (ip6_forward_rt.ro_rt->rt_flags &
502: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55 itojun 503: !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2 itojun 504: #if 0
505: /*
506: * The check below is redundant since the comparison of
507: * the destination and the key of the rtentry has
508: * already done through looking up the routing table.
509: */
510: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55 itojun 511: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2 itojun 512: #endif
1.9 itojun 513: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 514: struct in6_ifaddr *ia6 =
515: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
516: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
517: m->m_flags |= M_ANYCAST6;
1.24 itojun 518: /*
519: * packets to a tentative, duplicated, or somehow invalid
520: * address must not be accepted.
521: */
1.2 itojun 522: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 523: /* this address is ready */
1.2 itojun 524: ours = 1;
1.9 itojun 525: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 526: goto hbhcheck;
527: } else {
1.24 itojun 528: /* address is not ready, so discard the packet. */
1.34 itojun 529: nd6log((LOG_INFO,
1.27 itojun 530: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 531: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 532: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 533:
534: goto bad;
1.2 itojun 535: }
536: }
537:
538: /*
1.55 itojun 539: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 540: */
541: #if defined(NFAITH) && 0 < NFAITH
542: if (ip6_keepfaith) {
1.91 dyoung 543: if (ip6_forward_rt.ro_rt != NULL &&
544: ip6_forward_rt.ro_rt->rt_ifp != NULL &&
1.71 itojun 545: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 546: /* XXX do we need more sanity checks? */
547: ours = 1;
1.45 itojun 548: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 549: goto hbhcheck;
550: }
551: }
552: #endif
553:
554: #if 0
555: {
556: /*
557: * Last resort: check in6_ifaddr for incoming interface.
558: * The code is here until I update the "goto ours hack" code above
559: * working right.
560: */
561: struct ifaddr *ifa;
1.91 dyoung 562: TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) {
1.9 itojun 563: if (ifa->ifa_addr == NULL)
564: continue; /* just for safety */
565: if (ifa->ifa_addr->sa_family != AF_INET6)
566: continue;
567: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
568: ours = 1;
569: deliverifp = ifa->ifa_ifp;
1.2 itojun 570: goto hbhcheck;
571: }
572: }
1.9 itojun 573: }
1.2 itojun 574: #endif
575:
576: /*
577: * Now there is no reason to process the packet if it's not our own
578: * and we're not a router.
579: */
580: if (!ip6_forwarding) {
581: ip6stat.ip6s_cantforward++;
1.9 itojun 582: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 583: goto bad;
584: }
585:
586: hbhcheck:
587: /*
1.81 rpaulo 588: * record address information into m_tag, if we don't have one yet.
589: * note that we are unable to record it, if the address is not listed
590: * as our interface address (e.g. multicast addresses, addresses
591: * within FAITH prefixes and such).
592: */
593: if (deliverifp && !ip6_getdstifaddr(m)) {
594: struct in6_ifaddr *ia6;
595:
596: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
597: if (ia6) {
598: if (!ip6_setdstifaddr(m, ia6)) {
599: /*
600: * XXX maybe we should drop the packet here,
601: * as we could not provide enough information
602: * to the upper layers.
603: */
604: }
605: }
606: }
607:
608: /*
1.2 itojun 609: * Process Hop-by-Hop options header if it's contained.
610: * m may be modified in ip6_hopopts_input().
611: * If a JumboPayload option is included, plen will also be modified.
612: */
613: plen = (u_int32_t)ntohs(ip6->ip6_plen);
614: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 615: struct ip6_hbh *hbh;
616:
617: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
618: #if 0 /*touches NULL pointer*/
619: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
620: #endif
1.2 itojun 621: return; /* m have already been freed */
1.9 itojun 622: }
1.22 itojun 623:
1.2 itojun 624: /* adjust pointer */
625: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 626:
627: /*
1.49 itojun 628: * if the payload length field is 0 and the next header field
1.22 itojun 629: * indicates Hop-by-Hop Options header, then a Jumbo Payload
630: * option MUST be included.
631: */
632: if (ip6->ip6_plen == 0 && plen == 0) {
633: /*
634: * Note that if a valid jumbo payload option is
1.83 rpaulo 635: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 636: * (non-zero) payload length to the variable plen.
1.22 itojun 637: */
638: ip6stat.ip6s_badoptions++;
639: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
640: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
641: icmp6_error(m, ICMP6_PARAM_PROB,
642: ICMP6_PARAMPROB_HEADER,
643: (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
644: return;
645: }
1.9 itojun 646: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
647: sizeof(struct ip6_hbh));
648: if (hbh == NULL) {
649: ip6stat.ip6s_tooshort++;
650: return;
651: }
1.57 thorpej 652: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 653: nxt = hbh->ip6h_nxt;
1.2 itojun 654:
655: /*
656: * accept the packet if a router alert option is included
657: * and we act as an IPv6 router.
658: */
1.5 itojun 659: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 660: ours = 1;
661: } else
662: nxt = ip6->ip6_nxt;
663:
664: /*
665: * Check that the amount of data in the buffers
666: * is as at least much as the IPv6 header would have us expect.
667: * Trim mbufs if longer than we expect.
668: * Drop packet if shorter than we expect.
669: */
670: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
671: ip6stat.ip6s_tooshort++;
1.9 itojun 672: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 673: goto bad;
674: }
675: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
676: if (m->m_len == m->m_pkthdr.len) {
677: m->m_len = sizeof(struct ip6_hdr) + plen;
678: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
679: } else
680: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
681: }
682:
683: /*
684: * Forward if desirable.
685: */
686: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
687: /*
688: * If we are acting as a multicast router, all
689: * incoming multicast packets are passed to the
690: * kernel-level multicast forwarding function.
691: * The packet is returned (relatively) intact; if
692: * ip6_mforward() returns a non-zero value, the packet
693: * must be discarded, else it may be accepted below.
694: */
695: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
696: ip6stat.ip6s_cantforward++;
697: m_freem(m);
698: return;
699: }
700: if (!ours) {
701: m_freem(m);
702: return;
703: }
1.22 itojun 704: } else if (!ours) {
1.64 itojun 705: ip6_forward(m, srcrt);
1.2 itojun 706: return;
1.56 itojun 707: }
1.25 itojun 708:
709: ip6 = mtod(m, struct ip6_hdr *);
710:
711: /*
712: * Malicious party may be able to use IPv4 mapped addr to confuse
713: * tcp/udp stack and bypass security checks (act as if it was from
714: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
715: *
716: * For SIIT end node behavior, you may want to disable the check.
717: * However, you will become vulnerable to attacks using IPv4 mapped
718: * source.
719: */
720: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
721: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
722: ip6stat.ip6s_badscope++;
723: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
724: goto bad;
725: }
1.2 itojun 726:
727: /*
728: * Tell launch routine the next header
729: */
1.12 itojun 730: #ifdef IFA_STATS
1.28 itojun 731: if (deliverifp != NULL) {
1.9 itojun 732: struct in6_ifaddr *ia6;
733: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
734: if (ia6)
735: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
736: }
737: #endif
1.2 itojun 738: ip6stat.ip6s_delivered++;
1.9 itojun 739: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 740: nest = 0;
1.40 itojun 741:
1.2 itojun 742: while (nxt != IPPROTO_DONE) {
743: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
744: ip6stat.ip6s_toomanyhdr++;
745: goto bad;
746: }
1.8 itojun 747:
748: /*
749: * protection against faulty packet - there should be
750: * more sanity checks in header chain processing.
751: */
752: if (m->m_pkthdr.len < off) {
753: ip6stat.ip6s_tooshort++;
1.9 itojun 754: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 755: goto bad;
756: }
757:
1.37 itojun 758: #ifdef IPSEC
759: /*
760: * enforce IPsec policy checking if we are seeing last header.
761: * note that we do not visit this with protocols with pcb layer
762: * code - like udp/tcp/raw ip.
763: */
764: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
765: ipsec6_in_reject(m, NULL)) {
766: ipsec6stat.in_polvio++;
767: goto bad;
768: }
769: #endif
1.94 degroote 770: #ifdef FAST_IPSEC
771: /*
772: * enforce IPsec policy checking if we are seeing last header.
773: * note that we do not visit this with protocols with pcb layer
774: * code - like udp/tcp/raw ip.
775: */
776: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
777: /*
778: * Check if the packet has already had IPsec processing
779: * done. If so, then just pass it along. This tag gets
780: * set during AH, ESP, etc. input handling, before the
781: * packet is returned to the ip input queue for delivery.
782: */
783: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
784: s = splsoftnet();
785: if (mtag != NULL) {
786: tdbi = (struct tdb_ident *)(mtag + 1);
787: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
788: } else {
789: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
790: IP_FORWARDING, &error);
791: }
792: if (sp != NULL) {
793: /*
794: * Check security policy against packet attributes.
795: */
796: error = ipsec_in_reject(sp, m);
797: KEY_FREESP(&sp);
798: } else {
799: /* XXX error stat??? */
800: error = EINVAL;
801: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
802: goto bad;
803: }
804: splx(s);
805: if (error)
806: goto bad;
807: }
808: #endif /* FAST_IPSEC */
809:
1.56 itojun 810:
1.2 itojun 811: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
812: }
813: return;
814: bad:
815: m_freem(m);
816: }
817:
818: /*
1.81 rpaulo 819: * set/grab in6_ifaddr correspond to IPv6 destination address.
820: */
821: static struct m_tag *
822: ip6_setdstifaddr(m, ia6)
823: struct mbuf *m;
824: struct in6_ifaddr *ia6;
825: {
826: struct m_tag *mtag;
827:
828: mtag = ip6_addaux(m);
829: if (mtag)
830: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
831: return mtag; /* NULL if failed to set */
832: }
833:
834: struct in6_ifaddr *
835: ip6_getdstifaddr(m)
836: struct mbuf *m;
837: {
838: struct m_tag *mtag;
839:
840: mtag = ip6_findaux(m);
841: if (mtag)
842: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
843: else
844: return NULL;
845: }
846:
847: /*
1.2 itojun 848: * Hop-by-Hop options header processing. If a valid jumbo payload option is
849: * included, the real payload length will be stored in plenp.
850: */
851: static int
852: ip6_hopopts_input(plenp, rtalertp, mp, offp)
853: u_int32_t *plenp;
1.5 itojun 854: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 855: struct mbuf **mp;
856: int *offp;
857: {
1.35 itojun 858: struct mbuf *m = *mp;
1.2 itojun 859: int off = *offp, hbhlen;
860: struct ip6_hbh *hbh;
861:
862: /* validation of the length of the header */
1.9 itojun 863: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
864: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
865: if (hbh == NULL) {
866: ip6stat.ip6s_tooshort++;
867: return -1;
868: }
869: hbhlen = (hbh->ip6h_len + 1) << 3;
870: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
871: hbhlen);
872: if (hbh == NULL) {
873: ip6stat.ip6s_tooshort++;
874: return -1;
875: }
1.57 thorpej 876: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 877: off += hbhlen;
878: hbhlen -= sizeof(struct ip6_hbh);
879:
880: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
881: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 882: return (-1);
1.2 itojun 883:
884: *offp = off;
885: *mp = m;
1.58 itojun 886: return (0);
1.2 itojun 887: }
888:
889: /*
890: * Search header for all Hop-by-hop options and process each option.
891: * This function is separate from ip6_hopopts_input() in order to
892: * handle a case where the sending node itself process its hop-by-hop
893: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 894: *
895: * The function assumes that hbh header is located right after the IPv6 header
896: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
897: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 898: */
899: int
900: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
901: struct mbuf *m;
902: u_int8_t *opthead;
903: int hbhlen;
1.5 itojun 904: u_int32_t *rtalertp;
1.2 itojun 905: u_int32_t *plenp;
906: {
907: struct ip6_hdr *ip6;
908: int optlen = 0;
909: u_int8_t *opt = opthead;
910: u_int16_t rtalert_val;
1.22 itojun 911: u_int32_t jumboplen;
1.55 itojun 912: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 913:
914: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 915: switch (*opt) {
916: case IP6OPT_PAD1:
917: optlen = 1;
918: break;
919: case IP6OPT_PADN:
920: if (hbhlen < IP6OPT_MINLEN) {
921: ip6stat.ip6s_toosmall++;
922: goto bad;
923: }
924: optlen = *(opt + 1) + 2;
925: break;
926: case IP6OPT_RTALERT:
927: /* XXX may need check for alignment */
928: if (hbhlen < IP6OPT_RTALERT_LEN) {
929: ip6stat.ip6s_toosmall++;
930: goto bad;
931: }
932: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 933: /* XXX stat */
934: icmp6_error(m, ICMP6_PARAM_PROB,
935: ICMP6_PARAMPROB_HEADER,
936: erroff + opt + 1 - opthead);
937: return (-1);
1.35 itojun 938: }
939: optlen = IP6OPT_RTALERT_LEN;
940: bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
941: *rtalertp = ntohs(rtalert_val);
942: break;
943: case IP6OPT_JUMBO:
1.22 itojun 944: /* XXX may need check for alignment */
945: if (hbhlen < IP6OPT_JUMBO_LEN) {
946: ip6stat.ip6s_toosmall++;
947: goto bad;
948: }
1.35 itojun 949: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 950: /* XXX stat */
951: icmp6_error(m, ICMP6_PARAM_PROB,
952: ICMP6_PARAMPROB_HEADER,
953: erroff + opt + 1 - opthead);
954: return (-1);
1.35 itojun 955: }
1.22 itojun 956: optlen = IP6OPT_JUMBO_LEN;
957:
958: /*
959: * IPv6 packets that have non 0 payload length
1.35 itojun 960: * must not contain a jumbo payload option.
1.22 itojun 961: */
962: ip6 = mtod(m, struct ip6_hdr *);
963: if (ip6->ip6_plen) {
964: ip6stat.ip6s_badoptions++;
965: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 966: ICMP6_PARAMPROB_HEADER,
967: erroff + opt - opthead);
968: return (-1);
1.22 itojun 969: }
1.2 itojun 970:
1.22 itojun 971: /*
972: * We may see jumbolen in unaligned location, so
973: * we'd need to perform bcopy().
974: */
975: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
976: jumboplen = (u_int32_t)htonl(jumboplen);
977:
978: #if 1
979: /*
980: * if there are multiple jumbo payload options,
981: * *plenp will be non-zero and the packet will be
982: * rejected.
983: * the behavior may need some debate in ipngwg -
984: * multiple options does not make sense, however,
985: * there's no explicit mention in specification.
986: */
987: if (*plenp != 0) {
988: ip6stat.ip6s_badoptions++;
989: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 990: ICMP6_PARAMPROB_HEADER,
991: erroff + opt + 2 - opthead);
992: return (-1);
1.22 itojun 993: }
1.8 itojun 994: #endif
1.2 itojun 995:
1.22 itojun 996: /*
997: * jumbo payload length must be larger than 65535.
998: */
999: if (jumboplen <= IPV6_MAXPACKET) {
1000: ip6stat.ip6s_badoptions++;
1001: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1002: ICMP6_PARAMPROB_HEADER,
1003: erroff + opt + 2 - opthead);
1004: return (-1);
1.22 itojun 1005: }
1006: *plenp = jumboplen;
1007:
1008: break;
1.35 itojun 1009: default: /* unknown option */
1010: if (hbhlen < IP6OPT_MINLEN) {
1011: ip6stat.ip6s_toosmall++;
1012: goto bad;
1013: }
1.55 itojun 1014: optlen = ip6_unknown_opt(opt, m,
1015: erroff + opt - opthead);
1016: if (optlen == -1)
1017: return (-1);
1.35 itojun 1018: optlen += 2;
1019: break;
1.2 itojun 1020: }
1021: }
1022:
1.55 itojun 1023: return (0);
1.2 itojun 1024:
1025: bad:
1026: m_freem(m);
1.55 itojun 1027: return (-1);
1.2 itojun 1028: }
1029:
1030: /*
1031: * Unknown option processing.
1032: * The third argument `off' is the offset from the IPv6 header to the option,
1033: * which is necessary if the IPv6 header the and option header and IPv6 header
1034: * is not continuous in order to return an ICMPv6 error.
1035: */
1036: int
1037: ip6_unknown_opt(optp, m, off)
1038: u_int8_t *optp;
1039: struct mbuf *m;
1040: int off;
1041: {
1042: struct ip6_hdr *ip6;
1043:
1.35 itojun 1044: switch (IP6OPT_TYPE(*optp)) {
1045: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1046: return ((int)*(optp + 1));
1.35 itojun 1047: case IP6OPT_TYPE_DISCARD: /* silently discard */
1048: m_freem(m);
1.58 itojun 1049: return (-1);
1.35 itojun 1050: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1051: ip6stat.ip6s_badoptions++;
1052: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1053: return (-1);
1.35 itojun 1054: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1055: ip6stat.ip6s_badoptions++;
1056: ip6 = mtod(m, struct ip6_hdr *);
1057: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1058: (m->m_flags & (M_BCAST|M_MCAST)))
1059: m_freem(m);
1060: else
1061: icmp6_error(m, ICMP6_PARAM_PROB,
1062: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1063: return (-1);
1.2 itojun 1064: }
1065:
1066: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1067: return (-1);
1.2 itojun 1068: }
1069:
1070: /*
1.9 itojun 1071: * Create the "control" list for this pcb.
1072: *
1073: * The routine will be called from upper layer handlers like tcp6_input().
1074: * Thus the routine assumes that the caller (tcp6_input) have already
1075: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1076: * very first mbuf on the mbuf chain.
1077: * We may want to add some infinite loop prevention or sanity checks for safety.
1078: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1079: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1080: */
1081: void
1082: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 1083: struct in6pcb *in6p;
1084: struct mbuf **mp;
1085: struct ip6_hdr *ip6;
1086: struct mbuf *m;
1.2 itojun 1087: {
1.85 rpaulo 1088: #ifdef RFC2292
1089: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1090: #else
1091: #define IS2292(x, y) (y)
1092: #endif
1093:
1.9 itojun 1094: #ifdef SO_TIMESTAMP
1.2 itojun 1095: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1096: struct timeval tv;
1097:
1098: microtime(&tv);
1099: *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
1.63 itojun 1100: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1101: if (*mp)
1102: mp = &(*mp)->m_next;
1103: }
1.9 itojun 1104: #endif
1.87 rpaulo 1105:
1106: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1107: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1108: return;
1109:
1.2 itojun 1110: /* RFC 2292 sec. 5 */
1.35 itojun 1111: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1112: struct in6_pktinfo pi6;
1.85 rpaulo 1113:
1.2 itojun 1114: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1115: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1116: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1117: m->m_pkthdr.rcvif->if_index : 0;
1.2 itojun 1118: *mp = sbcreatecontrol((caddr_t) &pi6,
1.85 rpaulo 1119: sizeof(struct in6_pktinfo),
1120: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1121: if (*mp)
1122: mp = &(*mp)->m_next;
1123: }
1.85 rpaulo 1124:
1.2 itojun 1125: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1126: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1127:
1.63 itojun 1128: *mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),
1.85 rpaulo 1129: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1130: if (*mp)
1131: mp = &(*mp)->m_next;
1132: }
1133:
1134: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1135: u_int32_t flowinfo;
1136: int tclass;
1137:
1138: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1139: flowinfo >>= 20;
1140:
1141: tclass = flowinfo & 0xff;
1142: *mp = sbcreatecontrol((caddr_t)&tclass, sizeof(tclass),
1143: IPV6_TCLASS, IPPROTO_IPV6);
1144:
1.2 itojun 1145: if (*mp)
1146: mp = &(*mp)->m_next;
1147: }
1148:
1149: /*
1.75 itojun 1150: * IPV6_HOPOPTS socket option. Recall that we required super-user
1151: * privilege for the option (see ip6_ctloutput), but it might be too
1152: * strict, since there might be some hop-by-hop options which can be
1153: * returned to normal user.
1.85 rpaulo 1154: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1155: */
1.75 itojun 1156: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1157: /*
1158: * Check if a hop-by-hop options header is contatined in the
1159: * received packet, and if so, store the options as ancillary
1160: * data. Note that a hop-by-hop options header must be
1161: * just after the IPv6 header, which fact is assured through
1162: * the IPv6 input processing.
1163: */
1.78 christos 1164: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1165: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1166: struct ip6_hbh *hbh;
1167: int hbhlen;
1.62 itojun 1168: struct mbuf *ext;
1.9 itojun 1169:
1.62 itojun 1170: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1171: xip6->ip6_nxt);
1.62 itojun 1172: if (ext == NULL) {
1.9 itojun 1173: ip6stat.ip6s_tooshort++;
1174: return;
1175: }
1.62 itojun 1176: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1177: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1178: if (hbhlen != ext->m_len) {
1179: m_freem(ext);
1.9 itojun 1180: ip6stat.ip6s_tooshort++;
1181: return;
1182: }
1.2 itojun 1183:
1184: /*
1185: * XXX: We copy whole the header even if a jumbo
1186: * payload option is included, which option is to
1187: * be removed before returning in the RFC 2292.
1.85 rpaulo 1188: * Note: this constraint is removed in RFC3542.
1.2 itojun 1189: */
1.9 itojun 1190: *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
1.85 rpaulo 1191: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1192: IPPROTO_IPV6);
1.2 itojun 1193: if (*mp)
1194: mp = &(*mp)->m_next;
1.62 itojun 1195: m_freem(ext);
1.2 itojun 1196: }
1197: }
1198:
1199: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1200: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1201: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1202: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1203:
1204: /*
1205: * Search for destination options headers or routing
1206: * header(s) through the header chain, and stores each
1207: * header as ancillary data.
1208: * Note that the order of the headers remains in
1209: * the chain of ancillary data.
1210: */
1.86 rpaulo 1211: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1212: struct ip6_ext *ip6e = NULL;
1.9 itojun 1213: int elen;
1.62 itojun 1214: struct mbuf *ext = NULL;
1.9 itojun 1215:
1.62 itojun 1216: /*
1217: * if it is not an extension header, don't try to
1218: * pull it from the chain.
1219: */
1220: switch (nxt) {
1221: case IPPROTO_DSTOPTS:
1222: case IPPROTO_ROUTING:
1223: case IPPROTO_HOPOPTS:
1224: case IPPROTO_AH: /* is it possible? */
1225: break;
1226: default:
1227: goto loopend;
1228: }
1229:
1230: ext = ip6_pullexthdr(m, off, nxt);
1231: if (ext == NULL) {
1.9 itojun 1232: ip6stat.ip6s_tooshort++;
1233: return;
1234: }
1.62 itojun 1235: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1236: if (nxt == IPPROTO_AH)
1237: elen = (ip6e->ip6e_len + 2) << 2;
1238: else
1239: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1240: if (elen != ext->m_len) {
1241: m_freem(ext);
1.9 itojun 1242: ip6stat.ip6s_tooshort++;
1243: return;
1244: }
1.57 thorpej 1245: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1246:
1.35 itojun 1247: switch (nxt) {
1.62 itojun 1248: case IPPROTO_DSTOPTS:
1.35 itojun 1249: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1250: break;
1251:
1252: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.85 rpaulo 1253: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1254: IPPROTO_IPV6);
1.35 itojun 1255: if (*mp)
1256: mp = &(*mp)->m_next;
1257: break;
1258:
1259: case IPPROTO_ROUTING:
1260: if (!in6p->in6p_flags & IN6P_RTHDR)
1261: break;
1262:
1263: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.85 rpaulo 1264: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1265: IPPROTO_IPV6);
1.35 itojun 1266: if (*mp)
1267: mp = &(*mp)->m_next;
1268: break;
1269:
1.62 itojun 1270: case IPPROTO_HOPOPTS:
1271: case IPPROTO_AH: /* is it possible? */
1272: break;
1273:
1.35 itojun 1274: default:
1275: /*
1.62 itojun 1276: * other cases have been filtered in the above.
1277: * none will visit this case. here we supply
1278: * the code just in case (nxt overwritten or
1279: * other cases).
1.35 itojun 1280: */
1.62 itojun 1281: m_freem(ext);
1.35 itojun 1282: goto loopend;
1283:
1.2 itojun 1284: }
1285:
1286: /* proceed with the next header. */
1.9 itojun 1287: off += elen;
1.2 itojun 1288: nxt = ip6e->ip6e_nxt;
1.62 itojun 1289: ip6e = NULL;
1290: m_freem(ext);
1291: ext = NULL;
1.2 itojun 1292: }
1293: loopend:
1.62 itojun 1294: ;
1.2 itojun 1295: }
1.62 itojun 1296: }
1.85 rpaulo 1297: #undef IS2292
1298:
1299:
1300: void
1.95 ! dyoung 1301: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
! 1302: uint32_t *mtu)
1.85 rpaulo 1303: {
1304: struct socket *so;
1305: struct mbuf *m_mtu;
1306: struct ip6_mtuinfo mtuctl;
1307:
1308: so = in6p->in6p_socket;
1309:
1310: if (mtu == NULL)
1311: return;
1312:
1313: #ifdef DIAGNOSTIC
1314: if (so == NULL) /* I believe this is impossible */
1315: panic("ip6_notify_pmtu: socket is NULL");
1316: #endif
1317:
1318: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1319: mtuctl.ip6m_mtu = *mtu;
1320: mtuctl.ip6m_addr = *dst;
1321: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1322: return;
1323:
1324: if ((m_mtu = sbcreatecontrol((caddr_t)&mtuctl, sizeof(mtuctl),
1325: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1326: return;
1327:
1.95 ! dyoung 1328: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1329: == 0) {
1330: m_freem(m_mtu);
1331: /* XXX: should count statistics */
1332: } else
1333: sorwakeup(so);
1334:
1335: return;
1336: }
1.62 itojun 1337:
1338: /*
1339: * pull single extension header from mbuf chain. returns single mbuf that
1340: * contains the result, or NULL on error.
1341: */
1342: static struct mbuf *
1343: ip6_pullexthdr(m, off, nxt)
1344: struct mbuf *m;
1345: size_t off;
1346: int nxt;
1347: {
1348: struct ip6_ext ip6e;
1349: size_t elen;
1350: struct mbuf *n;
1351:
1352: #ifdef DIAGNOSTIC
1353: switch (nxt) {
1354: case IPPROTO_DSTOPTS:
1355: case IPPROTO_ROUTING:
1356: case IPPROTO_HOPOPTS:
1357: case IPPROTO_AH: /* is it possible? */
1358: break;
1359: default:
1360: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1361: }
1.62 itojun 1362: #endif
1.2 itojun 1363:
1.62 itojun 1364: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1365: if (nxt == IPPROTO_AH)
1366: elen = (ip6e.ip6e_len + 2) << 2;
1367: else
1368: elen = (ip6e.ip6e_len + 1) << 3;
1369:
1370: MGET(n, M_DONTWAIT, MT_DATA);
1371: if (n && elen >= MLEN) {
1372: MCLGET(n, M_DONTWAIT);
1373: if ((n->m_flags & M_EXT) == 0) {
1374: m_free(n);
1375: n = NULL;
1376: }
1377: }
1378: if (!n)
1379: return NULL;
1380:
1381: n->m_len = 0;
1382: if (elen >= M_TRAILINGSPACE(n)) {
1383: m_free(n);
1384: return NULL;
1385: }
1386:
1387: m_copydata(m, off, elen, mtod(n, caddr_t));
1388: n->m_len = elen;
1389: return n;
1.2 itojun 1390: }
1391:
1392: /*
1393: * Get pointer to the previous header followed by the header
1394: * currently processed.
1395: * XXX: This function supposes that
1396: * M includes all headers,
1397: * the next header field and the header length field of each header
1398: * are valid, and
1399: * the sum of each header length equals to OFF.
1400: * Because of these assumptions, this function must be called very
1401: * carefully. Moreover, it will not be used in the near future when
1402: * we develop `neater' mechanism to process extension headers.
1403: */
1.58 itojun 1404: u_int8_t *
1.2 itojun 1405: ip6_get_prevhdr(m, off)
1406: struct mbuf *m;
1407: int off;
1408: {
1409: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1410:
1411: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1412: return (&ip6->ip6_nxt);
1.2 itojun 1413: else {
1414: int len, nxt;
1415: struct ip6_ext *ip6e = NULL;
1416:
1417: nxt = ip6->ip6_nxt;
1418: len = sizeof(struct ip6_hdr);
1419: while (len < off) {
1420: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
1421:
1.35 itojun 1422: switch (nxt) {
1.2 itojun 1423: case IPPROTO_FRAGMENT:
1424: len += sizeof(struct ip6_frag);
1425: break;
1426: case IPPROTO_AH:
1427: len += (ip6e->ip6e_len + 2) << 2;
1428: break;
1429: default:
1430: len += (ip6e->ip6e_len + 1) << 3;
1431: break;
1432: }
1433: nxt = ip6e->ip6e_nxt;
1434: }
1435: if (ip6e)
1.58 itojun 1436: return (&ip6e->ip6e_nxt);
1.2 itojun 1437: else
1438: return NULL;
1.18 itojun 1439: }
1440: }
1441:
1442: /*
1443: * get next header offset. m will be retained.
1444: */
1445: int
1446: ip6_nexthdr(m, off, proto, nxtp)
1447: struct mbuf *m;
1448: int off;
1449: int proto;
1450: int *nxtp;
1451: {
1452: struct ip6_hdr ip6;
1453: struct ip6_ext ip6e;
1454: struct ip6_frag fh;
1455:
1456: /* just in case */
1457: if (m == NULL)
1458: panic("ip6_nexthdr: m == NULL");
1459: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1460: return -1;
1461:
1462: switch (proto) {
1463: case IPPROTO_IPV6:
1.83 rpaulo 1464: /* do not chase beyond intermediate IPv6 headers */
1465: if (off != 0)
1466: return -1;
1.18 itojun 1467: if (m->m_pkthdr.len < off + sizeof(ip6))
1468: return -1;
1469: m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
1470: if (nxtp)
1471: *nxtp = ip6.ip6_nxt;
1472: off += sizeof(ip6);
1473: return off;
1474:
1475: case IPPROTO_FRAGMENT:
1476: /*
1477: * terminate parsing if it is not the first fragment,
1478: * it does not make sense to parse through it.
1479: */
1480: if (m->m_pkthdr.len < off + sizeof(fh))
1481: return -1;
1482: m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
1.67 itojun 1483: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1484: return -1;
1485: if (nxtp)
1486: *nxtp = fh.ip6f_nxt;
1487: off += sizeof(struct ip6_frag);
1488: return off;
1489:
1490: case IPPROTO_AH:
1491: if (m->m_pkthdr.len < off + sizeof(ip6e))
1492: return -1;
1493: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1494: if (nxtp)
1495: *nxtp = ip6e.ip6e_nxt;
1496: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1497: if (m->m_pkthdr.len < off)
1498: return -1;
1.18 itojun 1499: return off;
1500:
1501: case IPPROTO_HOPOPTS:
1502: case IPPROTO_ROUTING:
1503: case IPPROTO_DSTOPTS:
1504: if (m->m_pkthdr.len < off + sizeof(ip6e))
1505: return -1;
1506: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1507: if (nxtp)
1508: *nxtp = ip6e.ip6e_nxt;
1509: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1510: if (m->m_pkthdr.len < off)
1511: return -1;
1.18 itojun 1512: return off;
1513:
1514: case IPPROTO_NONE:
1515: case IPPROTO_ESP:
1516: case IPPROTO_IPCOMP:
1517: /* give up */
1518: return -1;
1519:
1520: default:
1521: return -1;
1522: }
1523: }
1524:
1525: /*
1526: * get offset for the last header in the chain. m will be kept untainted.
1527: */
1528: int
1529: ip6_lasthdr(m, off, proto, nxtp)
1530: struct mbuf *m;
1531: int off;
1532: int proto;
1533: int *nxtp;
1534: {
1535: int newoff;
1536: int nxt;
1537:
1538: if (!nxtp) {
1539: nxt = -1;
1540: nxtp = &nxt;
1541: }
1.86 rpaulo 1542: for (;;) {
1.18 itojun 1543: newoff = ip6_nexthdr(m, off, proto, nxtp);
1544: if (newoff < 0)
1545: return off;
1546: else if (newoff < off)
1547: return -1; /* invalid */
1548: else if (newoff == off)
1549: return newoff;
1550:
1551: off = newoff;
1552: proto = *nxtp;
1.2 itojun 1553: }
1554: }
1555:
1.81 rpaulo 1556: struct m_tag *
1557: ip6_addaux(m)
1558: struct mbuf *m;
1559: {
1560: struct m_tag *mtag;
1561:
1562: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1563: if (!mtag) {
1564: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1565: M_NOWAIT);
1566: if (mtag) {
1567: m_tag_prepend(m, mtag);
1568: bzero(mtag + 1, sizeof(struct ip6aux));
1569: }
1570: }
1571: return mtag;
1572: }
1573:
1574: struct m_tag *
1575: ip6_findaux(m)
1576: struct mbuf *m;
1577: {
1578: struct m_tag *mtag;
1579:
1580: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1581: return mtag;
1582: }
1583:
1584: void
1585: ip6_delaux(m)
1586: struct mbuf *m;
1587: {
1588: struct m_tag *mtag;
1589:
1590: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1591: if (mtag)
1592: m_tag_delete(m, mtag);
1593: }
1594:
1.2 itojun 1595: /*
1596: * System control for IP6
1597: */
1598:
1599: u_char inet6ctlerrmap[PRC_NCMDS] = {
1600: 0, 0, 0, 0,
1601: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1602: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1603: EMSGSIZE, EHOSTUNREACH, 0, 0,
1604: 0, 0, 0, 0,
1605: ENOPROTOOPT
1606: };
1607:
1.70 atatat 1608: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1609: {
1.85 rpaulo 1610: #ifdef RFC2292
1611: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1612: #else
1613: #define IS2292(x, y) (y)
1614: #endif
1.26 itojun 1615:
1.73 atatat 1616: sysctl_createv(clog, 0, NULL, NULL,
1617: CTLFLAG_PERMANENT,
1.70 atatat 1618: CTLTYPE_NODE, "net", NULL,
1619: NULL, 0, NULL, 0,
1620: CTL_NET, CTL_EOL);
1.73 atatat 1621: sysctl_createv(clog, 0, NULL, NULL,
1622: CTLFLAG_PERMANENT,
1.74 atatat 1623: CTLTYPE_NODE, "inet6",
1624: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1625: NULL, 0, NULL, 0,
1626: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1627: sysctl_createv(clog, 0, NULL, NULL,
1628: CTLFLAG_PERMANENT,
1.74 atatat 1629: CTLTYPE_NODE, "ip6",
1630: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1631: NULL, 0, NULL, 0,
1632: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1633:
1.73 atatat 1634: sysctl_createv(clog, 0, NULL, NULL,
1635: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1636: CTLTYPE_INT, "forwarding",
1637: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1638: NULL, 0, &ip6_forwarding, 0,
1639: CTL_NET, PF_INET6, IPPROTO_IPV6,
1640: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1641: sysctl_createv(clog, 0, NULL, NULL,
1642: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1643: CTLTYPE_INT, "redirect",
1644: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1645: NULL, 0, &ip6_sendredirects, 0,
1646: CTL_NET, PF_INET6, IPPROTO_IPV6,
1647: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1648: sysctl_createv(clog, 0, NULL, NULL,
1649: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1650: CTLTYPE_INT, "hlim",
1651: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1652: NULL, 0, &ip6_defhlim, 0,
1653: CTL_NET, PF_INET6, IPPROTO_IPV6,
1654: IPV6CTL_DEFHLIM, CTL_EOL);
1655: #ifdef notyet
1.73 atatat 1656: sysctl_createv(clog, 0, NULL, NULL,
1657: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1658: CTLTYPE_INT, "mtu", NULL,
1659: NULL, 0, &, 0,
1660: CTL_NET, PF_INET6, IPPROTO_IPV6,
1661: IPV6CTL_DEFMTU, CTL_EOL);
1662: #endif
1663: #ifdef __no_idea__
1.73 atatat 1664: sysctl_createv(clog, 0, NULL, NULL,
1665: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1666: CTLTYPE_INT, "forwsrcrt", NULL,
1667: NULL, 0, &?, 0,
1668: CTL_NET, PF_INET6, IPPROTO_IPV6,
1669: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1670: sysctl_createv(clog, 0, NULL, NULL,
1671: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1672: CTLTYPE_STRUCT, "mrtstats", NULL,
1673: NULL, 0, &?, sizeof(?),
1674: CTL_NET, PF_INET6, IPPROTO_IPV6,
1675: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1676: sysctl_createv(clog, 0, NULL, NULL,
1677: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1678: CTLTYPE_?, "mrtproto", NULL,
1679: NULL, 0, &?, sizeof(?),
1680: CTL_NET, PF_INET6, IPPROTO_IPV6,
1681: IPV6CTL_MRTPROTO, CTL_EOL);
1682: #endif
1.73 atatat 1683: sysctl_createv(clog, 0, NULL, NULL,
1684: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1685: CTLTYPE_INT, "maxfragpackets",
1686: SYSCTL_DESCR("Maximum number of fragments to buffer "
1687: "for reassembly"),
1.70 atatat 1688: NULL, 0, &ip6_maxfragpackets, 0,
1689: CTL_NET, PF_INET6, IPPROTO_IPV6,
1690: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1691: #ifdef __no_idea__
1.73 atatat 1692: sysctl_createv(clog, 0, NULL, NULL,
1693: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1694: CTLTYPE_INT, "sourcecheck", NULL,
1695: NULL, 0, &?, 0,
1696: CTL_NET, PF_INET6, IPPROTO_IPV6,
1697: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1698: sysctl_createv(clog, 0, NULL, NULL,
1699: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1700: CTLTYPE_INT, "sourcecheck_logint", NULL,
1701: NULL, 0, &?, 0,
1702: CTL_NET, PF_INET6, IPPROTO_IPV6,
1703: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1704: #endif
1.73 atatat 1705: sysctl_createv(clog, 0, NULL, NULL,
1706: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1707: CTLTYPE_INT, "accept_rtadv",
1708: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1709: NULL, 0, &ip6_accept_rtadv, 0,
1710: CTL_NET, PF_INET6, IPPROTO_IPV6,
1711: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1712: sysctl_createv(clog, 0, NULL, NULL,
1713: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1714: CTLTYPE_INT, "keepfaith",
1715: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1716: NULL, 0, &ip6_keepfaith, 0,
1717: CTL_NET, PF_INET6, IPPROTO_IPV6,
1718: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1719: sysctl_createv(clog, 0, NULL, NULL,
1720: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1721: CTLTYPE_INT, "log_interval",
1722: SYSCTL_DESCR("Minumum interval between logging "
1723: "unroutable packets"),
1.70 atatat 1724: NULL, 0, &ip6_log_interval, 0,
1725: CTL_NET, PF_INET6, IPPROTO_IPV6,
1726: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1727: sysctl_createv(clog, 0, NULL, NULL,
1728: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1729: CTLTYPE_INT, "hdrnestlimit",
1730: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1731: NULL, 0, &ip6_hdrnestlimit, 0,
1732: CTL_NET, PF_INET6, IPPROTO_IPV6,
1733: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1734: sysctl_createv(clog, 0, NULL, NULL,
1735: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1736: CTLTYPE_INT, "dad_count",
1737: SYSCTL_DESCR("Number of Duplicate Address Detection "
1738: "probes to send"),
1.70 atatat 1739: NULL, 0, &ip6_dad_count, 0,
1740: CTL_NET, PF_INET6, IPPROTO_IPV6,
1741: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1742: sysctl_createv(clog, 0, NULL, NULL,
1743: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1744: CTLTYPE_INT, "auto_flowlabel",
1745: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1746: NULL, 0, &ip6_auto_flowlabel, 0,
1747: CTL_NET, PF_INET6, IPPROTO_IPV6,
1748: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1749: sysctl_createv(clog, 0, NULL, NULL,
1750: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1751: CTLTYPE_INT, "defmcasthlim",
1752: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1753: NULL, 0, &ip6_defmcasthlim, 0,
1754: CTL_NET, PF_INET6, IPPROTO_IPV6,
1755: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1756: #if NGIF > 0
1.73 atatat 1757: sysctl_createv(clog, 0, NULL, NULL,
1758: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1759: CTLTYPE_INT, "gifhlim",
1760: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1761: NULL, 0, &ip6_gif_hlim, 0,
1762: CTL_NET, PF_INET6, IPPROTO_IPV6,
1763: IPV6CTL_GIF_HLIM, CTL_EOL);
1764: #endif /* NGIF */
1.73 atatat 1765: sysctl_createv(clog, 0, NULL, NULL,
1766: CTLFLAG_PERMANENT,
1.74 atatat 1767: CTLTYPE_STRING, "kame_version",
1768: SYSCTL_DESCR("KAME Version"),
1.78 christos 1769: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1770: CTL_NET, PF_INET6, IPPROTO_IPV6,
1771: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1772: sysctl_createv(clog, 0, NULL, NULL,
1773: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1774: CTLTYPE_INT, "use_deprecated",
1775: SYSCTL_DESCR("Allow use of deprecated addresses as "
1776: "source addresses"),
1.70 atatat 1777: NULL, 0, &ip6_use_deprecated, 0,
1778: CTL_NET, PF_INET6, IPPROTO_IPV6,
1779: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1780: sysctl_createv(clog, 0, NULL, NULL,
1781: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1782: CTLTYPE_INT, "rr_prune", NULL,
1783: NULL, 0, &ip6_rr_prune, 0,
1784: CTL_NET, PF_INET6, IPPROTO_IPV6,
1785: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1786: sysctl_createv(clog, 0, NULL, NULL,
1787: CTLFLAG_PERMANENT
1.70 atatat 1788: #ifndef INET6_BINDV6ONLY
1.73 atatat 1789: |CTLFLAG_READWRITE,
1.70 atatat 1790: #endif
1.74 atatat 1791: CTLTYPE_INT, "v6only",
1792: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1793: "to PF_INET sockets"),
1.70 atatat 1794: NULL, 0, &ip6_v6only, 0,
1795: CTL_NET, PF_INET6, IPPROTO_IPV6,
1796: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1797: sysctl_createv(clog, 0, NULL, NULL,
1798: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1799: CTLTYPE_INT, "anonportmin",
1800: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1801: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1802: CTL_NET, PF_INET6, IPPROTO_IPV6,
1803: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1804: sysctl_createv(clog, 0, NULL, NULL,
1805: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1806: CTLTYPE_INT, "anonportmax",
1807: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1808: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1809: CTL_NET, PF_INET6, IPPROTO_IPV6,
1810: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1811: #ifndef IPNOPRIVPORTS
1.73 atatat 1812: sysctl_createv(clog, 0, NULL, NULL,
1813: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1814: CTLTYPE_INT, "lowportmin",
1815: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1816: "to assign"),
1.70 atatat 1817: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1818: CTL_NET, PF_INET6, IPPROTO_IPV6,
1819: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1820: sysctl_createv(clog, 0, NULL, NULL,
1821: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1822: CTLTYPE_INT, "lowportmax",
1823: SYSCTL_DESCR("Highest privileged ephemeral port number "
1824: "to assign"),
1.70 atatat 1825: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1826: CTL_NET, PF_INET6, IPPROTO_IPV6,
1827: IPV6CTL_LOWPORTMAX, CTL_EOL);
1828: #endif /* IPNOPRIVPORTS */
1.73 atatat 1829: sysctl_createv(clog, 0, NULL, NULL,
1830: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1831: CTLTYPE_INT, "use_tempaddr",
1832: SYSCTL_DESCR("Use temporary address"),
1833: NULL, 0, &ip6_use_tempaddr, 0,
1834: CTL_NET, PF_INET6, IPPROTO_IPV6,
1835: CTL_CREATE, CTL_EOL);
1836: sysctl_createv(clog, 0, NULL, NULL,
1837: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1838: CTLTYPE_INT, "temppltime",
1839: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1840: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1841: CTL_NET, PF_INET6, IPPROTO_IPV6,
1842: CTL_CREATE, CTL_EOL);
1843: sysctl_createv(clog, 0, NULL, NULL,
1844: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1845: CTLTYPE_INT, "tempvltime",
1846: SYSCTL_DESCR("valid lifetime of a temporary address"),
1847: NULL, 0, &ip6_temp_valid_lifetime, 0,
1848: CTL_NET, PF_INET6, IPPROTO_IPV6,
1849: CTL_CREATE, CTL_EOL);
1850: sysctl_createv(clog, 0, NULL, NULL,
1851: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1852: CTLTYPE_INT, "maxfrags",
1853: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1854: NULL, 0, &ip6_maxfrags, 0,
1855: CTL_NET, PF_INET6, IPPROTO_IPV6,
1856: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1857: sysctl_createv(clog, 0, NULL, NULL,
1858: CTLFLAG_PERMANENT,
1859: CTLTYPE_STRUCT, "stats",
1860: SYSCTL_DESCR("IPv6 statistics"),
1861: NULL, 0, &ip6stat, sizeof(ip6stat),
1862: CTL_NET, PF_INET6, IPPROTO_IPV6,
1863: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1864: sysctl_createv(clog, 0, NULL, NULL,
1865: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1866: CTLTYPE_INT, "use_defaultzone",
1867: SYSCTL_DESCR("Whether to use the default scope zones"),
1868: NULL, 0, &ip6_use_defzone, 0,
1869: CTL_NET, PF_INET6, IPPROTO_IPV6,
1870: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1871: sysctl_createv(clog, 0, NULL, NULL,
1872: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1873: CTLTYPE_INT, "mcast_pmtu",
1874: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1875: NULL, 0, &ip6_mcast_pmtu, 0,
1876: CTL_NET, PF_INET6, IPPROTO_IPV6,
1877: CTL_CREATE, CTL_EOL);
1.2 itojun 1878: }
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