Annotation of src/sys/netinet6/ip6_input.c, Revision 1.109.4.4
1.109.4.4! jmcneill 1: /* $NetBSD: ip6_input.c,v 1.113 2007/12/04 10:27:34 dyoung Exp $ */
1.40 itojun 2: /* $KAME: ip6_input.c,v 1.188 2001/03/29 05:34:31 itojun Exp $ */
1.3 thorpej 3:
1.2 itojun 4: /*
5: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6: * All rights reserved.
1.21 itojun 7: *
1.2 itojun 8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the project nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
1.21 itojun 19: *
1.2 itojun 20: * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: /*
34: * Copyright (c) 1982, 1986, 1988, 1993
35: * The Regents of the University of California. All rights reserved.
36: *
37: * Redistribution and use in source and binary forms, with or without
38: * modification, are permitted provided that the following conditions
39: * are met:
40: * 1. Redistributions of source code must retain the above copyright
41: * notice, this list of conditions and the following disclaimer.
42: * 2. Redistributions in binary form must reproduce the above copyright
43: * notice, this list of conditions and the following disclaimer in the
44: * documentation and/or other materials provided with the distribution.
1.65 agc 45: * 3. Neither the name of the University nor the names of its contributors
1.2 itojun 46: * may be used to endorse or promote products derived from this software
47: * without specific prior written permission.
48: *
49: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59: * SUCH DAMAGE.
60: *
61: * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
62: */
1.48 lukem 63:
64: #include <sys/cdefs.h>
1.109.4.4! jmcneill 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.113 2007/12/04 10:27:34 dyoung Exp $");
1.2 itojun 66:
67: #include "opt_inet.h"
1.85 rpaulo 68: #include "opt_inet6.h"
1.4 thorpej 69: #include "opt_ipsec.h"
1.15 darrenr 70: #include "opt_pfil_hooks.h"
1.2 itojun 71:
72: #include <sys/param.h>
73: #include <sys/systm.h>
74: #include <sys/malloc.h>
75: #include <sys/mbuf.h>
76: #include <sys/domain.h>
77: #include <sys/protosw.h>
78: #include <sys/socket.h>
79: #include <sys/socketvar.h>
80: #include <sys/errno.h>
81: #include <sys/time.h>
82: #include <sys/kernel.h>
83: #include <sys/syslog.h>
84: #include <sys/proc.h>
1.46 simonb 85: #include <sys/sysctl.h>
1.2 itojun 86:
87: #include <net/if.h>
88: #include <net/if_types.h>
89: #include <net/if_dl.h>
90: #include <net/route.h>
91: #include <net/netisr.h>
1.15 darrenr 92: #ifdef PFIL_HOOKS
93: #include <net/pfil.h>
94: #endif
1.2 itojun 95:
96: #include <netinet/in.h>
1.9 itojun 97: #include <netinet/in_systm.h>
98: #ifdef INET
99: #include <netinet/ip.h>
100: #include <netinet/ip_icmp.h>
1.45 itojun 101: #endif /* INET */
1.14 itojun 102: #include <netinet/ip6.h>
1.2 itojun 103: #include <netinet6/in6_var.h>
1.11 itojun 104: #include <netinet6/ip6_var.h>
1.2 itojun 105: #include <netinet6/in6_pcb.h>
1.14 itojun 106: #include <netinet/icmp6.h>
1.81 rpaulo 107: #include <netinet6/scope6_var.h>
1.2 itojun 108: #include <netinet6/in6_ifattach.h>
109: #include <netinet6/nd6.h>
110:
1.37 itojun 111: #ifdef IPSEC
112: #include <netinet6/ipsec.h>
113: #endif
114:
1.94 degroote 115: #ifdef FAST_IPSEC
116: #include <netipsec/ipsec.h>
117: #include <netipsec/ipsec6.h>
118: #include <netipsec/key.h>
119: #endif /* FAST_IPSEC */
120:
1.2 itojun 121: #include <netinet6/ip6protosw.h>
122:
123: #include "faith.h"
124: #include "gif.h"
1.50 itojun 125:
126: #if NGIF > 0
127: #include <netinet6/in6_gif.h>
128: #endif
1.2 itojun 129:
1.9 itojun 130: #include <net/net_osdep.h>
131:
1.2 itojun 132: extern struct domain inet6domain;
133:
134: u_char ip6_protox[IPPROTO_MAX];
135: static int ip6qmaxlen = IFQ_MAXLEN;
136: struct in6_ifaddr *in6_ifaddr;
137: struct ifqueue ip6intrq;
138:
1.108 ad 139: extern callout_t in6_tmpaddrtimer_ch;
1.83 rpaulo 140:
1.2 itojun 141: int ip6_forward_srcrt; /* XXX */
142: int ip6_sourcecheck; /* XXX */
143: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 144:
1.29 thorpej 145: #ifdef PFIL_HOOKS
146: struct pfil_head inet6_pfil_hook;
147: #endif
148:
1.2 itojun 149: struct ip6stat ip6stat;
150:
1.109.4.2 joerg 151: static void ip6_init2(void *);
1.109.4.3 joerg 152: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 153:
1.109.4.2 joerg 154: static int ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *);
155: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.2 itojun 156:
157: /*
158: * IP6 initialization: fill in IP6 protocol switch table.
159: * All protocols not implemented in kernel go to raw IP6 protocol handler.
160: */
161: void
162: ip6_init()
163: {
1.78 christos 164: const struct ip6protosw *pr;
1.35 itojun 165: int i;
1.2 itojun 166:
1.78 christos 167: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 168: if (pr == 0)
169: panic("ip6_init");
170: for (i = 0; i < IPPROTO_MAX; i++)
171: ip6_protox[i] = pr - inet6sw;
1.78 christos 172: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
173: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 174: if (pr->pr_domain->dom_family == PF_INET6 &&
175: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
176: ip6_protox[pr->pr_protocol] = pr - inet6sw;
177: ip6intrq.ifq_maxlen = ip6qmaxlen;
1.81 rpaulo 178: scope6_init();
179: addrsel_policy_init();
1.2 itojun 180: nd6_init();
181: frag6_init();
1.83 rpaulo 182: ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 183:
184: ip6_init2((void *)0);
1.98 liamjfoy 185: #ifdef GATEWAY
1.99 liamjfoy 186: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 187: #endif
1.29 thorpej 188:
189: #ifdef PFIL_HOOKS
190: /* Register our Packet Filter hook. */
1.33 thorpej 191: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
192: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 193: i = pfil_head_register(&inet6_pfil_hook);
194: if (i != 0)
195: printf("ip6_init: WARNING: unable to register pfil hook, "
196: "error %d\n", i);
197: #endif /* PFIL_HOOKS */
1.2 itojun 198: }
199:
200: static void
1.90 christos 201: ip6_init2(void *dummy)
1.2 itojun 202: {
203:
204: /* nd6_timer_init */
1.108 ad 205: callout_init(&nd6_timer_ch, 0);
1.19 thorpej 206: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83 rpaulo 207:
208: /* timer for regeneranation of temporary addresses randomize ID */
1.108 ad 209: callout_init(&in6_tmpaddrtimer_ch, 0);
1.83 rpaulo 210: callout_reset(&in6_tmpaddrtimer_ch,
211: (ip6_temp_preferred_lifetime - ip6_desync_factor -
212: ip6_temp_regen_advance) * hz,
213: in6_tmpaddrtimer, NULL);
1.2 itojun 214: }
215:
216: /*
217: * IP6 input interrupt handling. Just pass the packet to ip6_input.
218: */
219: void
220: ip6intr()
221: {
222: int s;
223: struct mbuf *m;
224:
225: for (;;) {
1.41 thorpej 226: s = splnet();
1.2 itojun 227: IF_DEQUEUE(&ip6intrq, m);
228: splx(s);
229: if (m == 0)
230: return;
1.83 rpaulo 231: /* drop the packet if IPv6 operation is disabled on the IF */
232: if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {
233: m_freem(m);
234: return;
235: }
1.2 itojun 236: ip6_input(m);
237: }
238: }
239:
1.103 dyoung 240: extern struct route ip6_forward_rt;
1.2 itojun 241:
242: void
1.96 dyoung 243: ip6_input(struct mbuf *m)
1.2 itojun 244: {
1.9 itojun 245: struct ip6_hdr *ip6;
1.105 dyoung 246: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 247: u_int32_t plen;
1.5 itojun 248: u_int32_t rtalert = ~0;
1.104 yamt 249: int nxt, ours = 0, rh_present = 0;
1.9 itojun 250: struct ifnet *deliverifp = NULL;
1.64 itojun 251: int srcrt = 0;
1.105 dyoung 252: const struct rtentry *rt;
253: union {
254: struct sockaddr dst;
255: struct sockaddr_in6 dst6;
256: } u;
1.94 degroote 257: #ifdef FAST_IPSEC
258: struct m_tag *mtag;
259: struct tdb_ident *tdbi;
260: struct secpolicy *sp;
261: int s, error;
262: #endif
1.2 itojun 263:
264: #ifdef IPSEC
265: /*
266: * should the inner packet be considered authentic?
267: * see comment in ah4_input().
268: */
1.49 itojun 269: m->m_flags &= ~M_AUTHIPHDR;
270: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 271: #endif
1.9 itojun 272:
1.2 itojun 273: /*
1.81 rpaulo 274: * make sure we don't have onion peering information into m_tag.
275: */
276: ip6_delaux(m);
277:
278: /*
1.44 itojun 279: * mbuf statistics
1.2 itojun 280: */
281: if (m->m_flags & M_EXT) {
282: if (m->m_next)
283: ip6stat.ip6s_mext2m++;
284: else
285: ip6stat.ip6s_mext1++;
286: } else {
1.96 dyoung 287: #define M2MMAX __arraycount(ip6stat.ip6s_m2m)
1.2 itojun 288: if (m->m_next) {
1.9 itojun 289: if (m->m_flags & M_LOOP) {
1.77 peter 290: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 291: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 292: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
293: else
294: ip6stat.ip6s_m2m[0]++;
295: } else
296: ip6stat.ip6s_m1++;
1.40 itojun 297: #undef M2MMAX
1.2 itojun 298: }
299:
1.9 itojun 300: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
301: ip6stat.ip6s_total++;
302:
1.57 thorpej 303: /*
304: * If the IPv6 header is not aligned, slurp it up into a new
305: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 306: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 307: * IPv6 header is in the first mbuf of the chain.
308: */
1.97 christos 309: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 310: struct ifnet *inifp = m->m_pkthdr.rcvif;
311: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
312: (max_linkhdr + 3) & ~3)) == NULL) {
313: /* XXXJRT new stat, please */
314: ip6stat.ip6s_toosmall++;
315: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
316: return;
317: }
318: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
319: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 320: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 321: ip6stat.ip6s_toosmall++;
322: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
323: return;
324: }
1.2 itojun 325: }
326:
327: ip6 = mtod(m, struct ip6_hdr *);
328:
329: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
330: ip6stat.ip6s_badvers++;
1.9 itojun 331: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 332: goto bad;
333: }
1.15 darrenr 334:
1.98 liamjfoy 335: #if defined(IPSEC)
336: /* IPv6 fast forwarding is not compatible with IPsec. */
337: m->m_flags &= ~M_CANFASTFWD;
338: #else
339: /*
340: * Assume that we can create a fast-forward IP flow entry
341: * based on this packet.
342: */
343: m->m_flags |= M_CANFASTFWD;
344: #endif
345:
1.15 darrenr 346: #ifdef PFIL_HOOKS
347: /*
348: * Run through list of hooks for input packets. If there are any
349: * filters which require that additional packets in the flow are
350: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
351: * Note that filters must _never_ set this flag, as another filter
352: * in the list may have previously cleared it.
353: */
1.39 itojun 354: /*
355: * let ipfilter look at packet on the wire,
356: * not the decapsulated packet.
357: */
358: #ifdef IPSEC
1.42 itojun 359: if (!ipsec_getnhist(m))
1.94 degroote 360: #elif defined(FAST_IPSEC)
361: if (!ipsec_indone(m))
1.39 itojun 362: #else
363: if (1)
364: #endif
365: {
1.64 itojun 366: struct in6_addr odst;
367:
368: odst = ip6->ip6_dst;
1.39 itojun 369: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
370: PFIL_IN) != 0)
371: return;
372: if (m == NULL)
373: return;
374: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 375: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 376: }
1.15 darrenr 377: #endif /* PFIL_HOOKS */
378:
1.2 itojun 379: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
380:
1.30 thorpej 381: #ifdef ALTQ
382: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
383: /* packet is dropped by traffic conditioner */
384: return;
1.9 itojun 385: }
386: #endif
387:
1.2 itojun 388: /*
1.44 itojun 389: * Check against address spoofing/corruption.
1.2 itojun 390: */
391: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
392: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 393: /*
394: * XXX: "badscope" is not very suitable for a multicast source.
395: */
1.2 itojun 396: ip6stat.ip6s_badscope++;
1.9 itojun 397: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 398: goto bad;
399: }
1.13 itojun 400: /*
1.44 itojun 401: * The following check is not documented in specs. A malicious
402: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
403: * and bypass security checks (act as if it was from 127.0.0.1 by using
404: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 405: *
1.44 itojun 406: * This check chokes if we are in an SIIT cloud. As none of BSDs
407: * support IPv4-less kernel compilation, we cannot support SIIT
408: * environment at all. So, it makes more sense for us to reject any
409: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 410: * partial support for SIIT environment.
1.13 itojun 411: */
412: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
413: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
414: ip6stat.ip6s_badscope++;
415: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
416: goto bad;
417: }
1.17 itojun 418: #if 0
1.13 itojun 419: /*
1.17 itojun 420: * Reject packets with IPv4 compatible addresses (auto tunnel).
421: *
422: * The code forbids auto tunnel relay case in RFC1933 (the check is
423: * stronger than RFC1933). We may want to re-enable it if mech-xx
424: * is revised to forbid relaying case.
1.13 itojun 425: */
426: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
427: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
428: ip6stat.ip6s_badscope++;
429: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
430: goto bad;
431: }
432: #endif
1.35 itojun 433:
1.2 itojun 434: /*
1.82 yamt 435: * Disambiguate address scope zones (if there is ambiguity).
436: * We first make sure that the original source or destination address
437: * is not in our internal form for scoped addresses. Such addresses
438: * are not necessarily invalid spec-wise, but we cannot accept them due
439: * to the usage conflict.
440: * in6_setscope() then also checks and rejects the cases where src or
441: * dst are the loopback address and the receiving interface
442: * is not loopback.
443: */
1.88 bouyer 444: if (__predict_false(
445: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
446: goto bad;
447: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 448: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
449: ip6stat.ip6s_badscope++; /* XXX */
450: goto bad;
451: }
452: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
453: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
454: ip6stat.ip6s_badscope++;
455: goto bad;
456: }
457:
458: /*
1.2 itojun 459: * Multicast check
460: */
461: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
462: struct in6_multi *in6m = 0;
1.9 itojun 463:
464: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 465: /*
466: * See if we belong to the destination multicast group on the
467: * arrival interface.
468: */
469: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
470: if (in6m)
471: ours = 1;
472: else if (!ip6_mrouter) {
473: ip6stat.ip6s_notmember++;
474: ip6stat.ip6s_cantforward++;
1.9 itojun 475: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 476: goto bad;
477: }
1.9 itojun 478: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 479: goto hbhcheck;
480: }
481:
1.105 dyoung 482: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
483:
1.2 itojun 484: /*
485: * Unicast check
486: */
1.105 dyoung 487: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
488: if (hit)
489: ip6stat.ip6s_forward_cachehit++;
1.93 joerg 490: else
491: ip6stat.ip6s_forward_cachemiss++;
1.22 itojun 492:
1.109 dyoung 493: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 494:
495: /*
496: * Accept the packet if the forwarding interface to the destination
497: * according to the routing table is the loopback interface,
498: * unless the associated route has a gateway.
499: * Note that this approach causes to accept a packet if there is a
500: * route to the loopback interface for the destination of the packet.
501: * But we think it's even useful in some situations, e.g. when using
502: * a special daemon which wants to intercept the packet.
503: */
1.105 dyoung 504: if (rt != NULL &&
505: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
506: !(rt->rt_flags & RTF_CLONED) &&
1.2 itojun 507: #if 0
508: /*
509: * The check below is redundant since the comparison of
510: * the destination and the key of the rtentry has
511: * already done through looking up the routing table.
512: */
1.109 dyoung 513: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 514: #endif
1.105 dyoung 515: rt->rt_ifp->if_type == IFT_LOOP) {
516: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 517: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
518: m->m_flags |= M_ANYCAST6;
1.24 itojun 519: /*
520: * packets to a tentative, duplicated, or somehow invalid
521: * address must not be accepted.
522: */
1.2 itojun 523: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 524: /* this address is ready */
1.2 itojun 525: ours = 1;
1.9 itojun 526: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 527: goto hbhcheck;
528: } else {
1.24 itojun 529: /* address is not ready, so discard the packet. */
1.34 itojun 530: nd6log((LOG_INFO,
1.27 itojun 531: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 532: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 533: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 534:
535: goto bad;
1.2 itojun 536: }
537: }
538:
539: /*
1.55 itojun 540: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 541: */
542: #if defined(NFAITH) && 0 < NFAITH
543: if (ip6_keepfaith) {
1.105 dyoung 544: if (rt != NULL && rt->rt_ifp != NULL &&
545: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 546: /* XXX do we need more sanity checks? */
547: ours = 1;
1.105 dyoung 548: deliverifp = 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;
1.109.4.4! jmcneill 562: IFADDR_FOREACH(ifa, m->m_pkthdr.rcvif) {
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: */
1.109.4.2 joerg 593: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 594: struct in6_ifaddr *ia6;
595:
596: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.109.4.2 joerg 597: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
598: /*
599: * XXX maybe we should drop the packet here,
600: * as we could not provide enough information
601: * to the upper layers.
602: */
1.81 rpaulo 603: }
604: }
605:
606: /*
1.2 itojun 607: * Process Hop-by-Hop options header if it's contained.
608: * m may be modified in ip6_hopopts_input().
609: * If a JumboPayload option is included, plen will also be modified.
610: */
611: plen = (u_int32_t)ntohs(ip6->ip6_plen);
612: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 613: struct ip6_hbh *hbh;
614:
615: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
616: #if 0 /*touches NULL pointer*/
617: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
618: #endif
1.2 itojun 619: return; /* m have already been freed */
1.9 itojun 620: }
1.22 itojun 621:
1.2 itojun 622: /* adjust pointer */
623: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 624:
625: /*
1.49 itojun 626: * if the payload length field is 0 and the next header field
1.22 itojun 627: * indicates Hop-by-Hop Options header, then a Jumbo Payload
628: * option MUST be included.
629: */
630: if (ip6->ip6_plen == 0 && plen == 0) {
631: /*
632: * Note that if a valid jumbo payload option is
1.83 rpaulo 633: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 634: * (non-zero) payload length to the variable plen.
1.22 itojun 635: */
636: ip6stat.ip6s_badoptions++;
637: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
638: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
639: icmp6_error(m, ICMP6_PARAM_PROB,
640: ICMP6_PARAMPROB_HEADER,
1.97 christos 641: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 642: return;
643: }
1.9 itojun 644: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
645: sizeof(struct ip6_hbh));
646: if (hbh == NULL) {
647: ip6stat.ip6s_tooshort++;
648: return;
649: }
1.57 thorpej 650: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 651: nxt = hbh->ip6h_nxt;
1.2 itojun 652:
653: /*
654: * accept the packet if a router alert option is included
655: * and we act as an IPv6 router.
656: */
1.5 itojun 657: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 658: ours = 1;
659: } else
660: nxt = ip6->ip6_nxt;
661:
662: /*
663: * Check that the amount of data in the buffers
664: * is as at least much as the IPv6 header would have us expect.
665: * Trim mbufs if longer than we expect.
666: * Drop packet if shorter than we expect.
667: */
668: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
669: ip6stat.ip6s_tooshort++;
1.9 itojun 670: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 671: goto bad;
672: }
673: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
674: if (m->m_len == m->m_pkthdr.len) {
675: m->m_len = sizeof(struct ip6_hdr) + plen;
676: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
677: } else
678: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
679: }
680:
681: /*
682: * Forward if desirable.
683: */
684: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
685: /*
686: * If we are acting as a multicast router, all
687: * incoming multicast packets are passed to the
688: * kernel-level multicast forwarding function.
689: * The packet is returned (relatively) intact; if
690: * ip6_mforward() returns a non-zero value, the packet
691: * must be discarded, else it may be accepted below.
692: */
693: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
694: ip6stat.ip6s_cantforward++;
695: m_freem(m);
696: return;
697: }
698: if (!ours) {
699: m_freem(m);
700: return;
701: }
1.22 itojun 702: } else if (!ours) {
1.64 itojun 703: ip6_forward(m, srcrt);
1.2 itojun 704: return;
1.56 itojun 705: }
1.25 itojun 706:
707: ip6 = mtod(m, struct ip6_hdr *);
708:
709: /*
710: * Malicious party may be able to use IPv4 mapped addr to confuse
711: * tcp/udp stack and bypass security checks (act as if it was from
712: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
713: *
714: * For SIIT end node behavior, you may want to disable the check.
715: * However, you will become vulnerable to attacks using IPv4 mapped
716: * source.
717: */
718: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
719: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
720: ip6stat.ip6s_badscope++;
721: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
722: goto bad;
723: }
1.2 itojun 724:
725: /*
726: * Tell launch routine the next header
727: */
1.12 itojun 728: #ifdef IFA_STATS
1.28 itojun 729: if (deliverifp != NULL) {
1.9 itojun 730: struct in6_ifaddr *ia6;
731: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
732: if (ia6)
733: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
734: }
735: #endif
1.2 itojun 736: ip6stat.ip6s_delivered++;
1.9 itojun 737: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 738: nest = 0;
1.40 itojun 739:
1.104 yamt 740: rh_present = 0;
1.2 itojun 741: while (nxt != IPPROTO_DONE) {
742: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
743: ip6stat.ip6s_toomanyhdr++;
1.104 yamt 744: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 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:
1.104 yamt 758: if (nxt == IPPROTO_ROUTING) {
759: if (rh_present++) {
760: in6_ifstat_inc(m->m_pkthdr.rcvif,
761: ifs6_in_hdrerr);
762: ip6stat.ip6s_badoptions++;
763: goto bad;
764: }
765: }
766:
1.37 itojun 767: #ifdef IPSEC
768: /*
769: * enforce IPsec policy checking if we are seeing last header.
770: * note that we do not visit this with protocols with pcb layer
771: * code - like udp/tcp/raw ip.
772: */
773: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
774: ipsec6_in_reject(m, NULL)) {
775: ipsec6stat.in_polvio++;
776: goto bad;
777: }
778: #endif
1.94 degroote 779: #ifdef FAST_IPSEC
780: /*
781: * enforce IPsec policy checking if we are seeing last header.
782: * note that we do not visit this with protocols with pcb layer
783: * code - like udp/tcp/raw ip.
784: */
785: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
786: /*
787: * Check if the packet has already had IPsec processing
788: * done. If so, then just pass it along. This tag gets
789: * set during AH, ESP, etc. input handling, before the
790: * packet is returned to the ip input queue for delivery.
791: */
792: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
793: s = splsoftnet();
794: if (mtag != NULL) {
795: tdbi = (struct tdb_ident *)(mtag + 1);
796: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
797: } else {
798: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
799: IP_FORWARDING, &error);
800: }
801: if (sp != NULL) {
802: /*
803: * Check security policy against packet attributes.
804: */
805: error = ipsec_in_reject(sp, m);
806: KEY_FREESP(&sp);
807: } else {
808: /* XXX error stat??? */
809: error = EINVAL;
810: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
811: }
812: splx(s);
813: if (error)
814: goto bad;
815: }
816: #endif /* FAST_IPSEC */
817:
1.56 itojun 818:
1.2 itojun 819: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
820: }
821: return;
822: bad:
823: m_freem(m);
824: }
825:
826: /*
1.81 rpaulo 827: * set/grab in6_ifaddr correspond to IPv6 destination address.
828: */
829: static struct m_tag *
1.109.4.3 joerg 830: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 831: {
832: struct m_tag *mtag;
833:
834: mtag = ip6_addaux(m);
1.109.4.3 joerg 835: if (mtag != NULL) {
836: struct ip6aux *ip6a;
837:
838: ip6a = (struct ip6aux *)(mtag + 1);
839: in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id);
840: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
841: ip6a->ip6a_flags = ia->ia6_flags;
842: }
1.81 rpaulo 843: return mtag; /* NULL if failed to set */
844: }
845:
1.109.4.3 joerg 846: const struct ip6aux *
1.107 christos 847: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 848: {
849: struct m_tag *mtag;
850:
851: mtag = ip6_findaux(m);
1.109.4.3 joerg 852: if (mtag != NULL)
853: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 854: else
855: return NULL;
856: }
857:
858: /*
1.2 itojun 859: * Hop-by-Hop options header processing. If a valid jumbo payload option is
860: * included, the real payload length will be stored in plenp.
1.107 christos 861: *
862: * rtalertp - XXX: should be stored more smart way
1.2 itojun 863: */
864: static int
1.107 christos 865: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
866: struct mbuf **mp, int *offp)
1.2 itojun 867: {
1.35 itojun 868: struct mbuf *m = *mp;
1.2 itojun 869: int off = *offp, hbhlen;
870: struct ip6_hbh *hbh;
871:
872: /* validation of the length of the header */
1.9 itojun 873: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
874: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
875: if (hbh == NULL) {
876: ip6stat.ip6s_tooshort++;
877: return -1;
878: }
879: hbhlen = (hbh->ip6h_len + 1) << 3;
880: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
881: hbhlen);
882: if (hbh == NULL) {
883: ip6stat.ip6s_tooshort++;
884: return -1;
885: }
1.57 thorpej 886: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 887: off += hbhlen;
888: hbhlen -= sizeof(struct ip6_hbh);
889:
890: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
891: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 892: return (-1);
1.2 itojun 893:
894: *offp = off;
895: *mp = m;
1.58 itojun 896: return (0);
1.2 itojun 897: }
898:
899: /*
900: * Search header for all Hop-by-hop options and process each option.
901: * This function is separate from ip6_hopopts_input() in order to
902: * handle a case where the sending node itself process its hop-by-hop
903: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 904: *
905: * The function assumes that hbh header is located right after the IPv6 header
906: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
907: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 908: */
909: int
1.107 christos 910: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
911: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 912: {
913: struct ip6_hdr *ip6;
914: int optlen = 0;
915: u_int8_t *opt = opthead;
916: u_int16_t rtalert_val;
1.22 itojun 917: u_int32_t jumboplen;
1.55 itojun 918: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 919:
920: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 921: switch (*opt) {
922: case IP6OPT_PAD1:
923: optlen = 1;
924: break;
925: case IP6OPT_PADN:
926: if (hbhlen < IP6OPT_MINLEN) {
927: ip6stat.ip6s_toosmall++;
928: goto bad;
929: }
930: optlen = *(opt + 1) + 2;
931: break;
932: case IP6OPT_RTALERT:
933: /* XXX may need check for alignment */
934: if (hbhlen < IP6OPT_RTALERT_LEN) {
935: ip6stat.ip6s_toosmall++;
936: goto bad;
937: }
938: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 939: /* XXX stat */
940: icmp6_error(m, ICMP6_PARAM_PROB,
941: ICMP6_PARAMPROB_HEADER,
942: erroff + opt + 1 - opthead);
943: return (-1);
1.35 itojun 944: }
945: optlen = IP6OPT_RTALERT_LEN;
1.97 christos 946: bcopy((void *)(opt + 2), (void *)&rtalert_val, 2);
1.35 itojun 947: *rtalertp = ntohs(rtalert_val);
948: break;
949: case IP6OPT_JUMBO:
1.22 itojun 950: /* XXX may need check for alignment */
951: if (hbhlen < IP6OPT_JUMBO_LEN) {
952: ip6stat.ip6s_toosmall++;
953: goto bad;
954: }
1.35 itojun 955: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 956: /* XXX stat */
957: icmp6_error(m, ICMP6_PARAM_PROB,
958: ICMP6_PARAMPROB_HEADER,
959: erroff + opt + 1 - opthead);
960: return (-1);
1.35 itojun 961: }
1.22 itojun 962: optlen = IP6OPT_JUMBO_LEN;
963:
964: /*
965: * IPv6 packets that have non 0 payload length
1.35 itojun 966: * must not contain a jumbo payload option.
1.22 itojun 967: */
968: ip6 = mtod(m, struct ip6_hdr *);
969: if (ip6->ip6_plen) {
970: ip6stat.ip6s_badoptions++;
971: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 972: ICMP6_PARAMPROB_HEADER,
973: erroff + opt - opthead);
974: return (-1);
1.22 itojun 975: }
1.2 itojun 976:
1.22 itojun 977: /*
978: * We may see jumbolen in unaligned location, so
979: * we'd need to perform bcopy().
980: */
981: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
982: jumboplen = (u_int32_t)htonl(jumboplen);
983:
984: #if 1
985: /*
986: * if there are multiple jumbo payload options,
987: * *plenp will be non-zero and the packet will be
988: * rejected.
989: * the behavior may need some debate in ipngwg -
990: * multiple options does not make sense, however,
991: * there's no explicit mention in specification.
992: */
993: if (*plenp != 0) {
994: ip6stat.ip6s_badoptions++;
995: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 996: ICMP6_PARAMPROB_HEADER,
997: erroff + opt + 2 - opthead);
998: return (-1);
1.22 itojun 999: }
1.8 itojun 1000: #endif
1.2 itojun 1001:
1.22 itojun 1002: /*
1003: * jumbo payload length must be larger than 65535.
1004: */
1005: if (jumboplen <= IPV6_MAXPACKET) {
1006: ip6stat.ip6s_badoptions++;
1007: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1008: ICMP6_PARAMPROB_HEADER,
1009: erroff + opt + 2 - opthead);
1010: return (-1);
1.22 itojun 1011: }
1012: *plenp = jumboplen;
1013:
1014: break;
1.35 itojun 1015: default: /* unknown option */
1016: if (hbhlen < IP6OPT_MINLEN) {
1017: ip6stat.ip6s_toosmall++;
1018: goto bad;
1019: }
1.55 itojun 1020: optlen = ip6_unknown_opt(opt, m,
1021: erroff + opt - opthead);
1022: if (optlen == -1)
1023: return (-1);
1.35 itojun 1024: optlen += 2;
1025: break;
1.2 itojun 1026: }
1027: }
1028:
1.55 itojun 1029: return (0);
1.2 itojun 1030:
1031: bad:
1032: m_freem(m);
1.55 itojun 1033: return (-1);
1.2 itojun 1034: }
1035:
1036: /*
1037: * Unknown option processing.
1038: * The third argument `off' is the offset from the IPv6 header to the option,
1039: * which is necessary if the IPv6 header the and option header and IPv6 header
1040: * is not continuous in order to return an ICMPv6 error.
1041: */
1042: int
1.107 christos 1043: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1044: {
1045: struct ip6_hdr *ip6;
1046:
1.35 itojun 1047: switch (IP6OPT_TYPE(*optp)) {
1048: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1049: return ((int)*(optp + 1));
1.35 itojun 1050: case IP6OPT_TYPE_DISCARD: /* silently discard */
1051: m_freem(m);
1.58 itojun 1052: return (-1);
1.35 itojun 1053: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1054: ip6stat.ip6s_badoptions++;
1055: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1056: return (-1);
1.35 itojun 1057: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1058: ip6stat.ip6s_badoptions++;
1059: ip6 = mtod(m, struct ip6_hdr *);
1060: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1061: (m->m_flags & (M_BCAST|M_MCAST)))
1062: m_freem(m);
1063: else
1064: icmp6_error(m, ICMP6_PARAM_PROB,
1065: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1066: return (-1);
1.2 itojun 1067: }
1068:
1069: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1070: return (-1);
1.2 itojun 1071: }
1072:
1073: /*
1.9 itojun 1074: * Create the "control" list for this pcb.
1075: *
1076: * The routine will be called from upper layer handlers like tcp6_input().
1077: * Thus the routine assumes that the caller (tcp6_input) have already
1078: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1079: * very first mbuf on the mbuf chain.
1080: * We may want to add some infinite loop prevention or sanity checks for safety.
1081: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1082: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1083: */
1084: void
1.107 christos 1085: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1086: struct ip6_hdr *ip6, 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);
1.97 christos 1099: *mp = sbcreatecontrol((void *) &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;
1.97 christos 1118: *mp = sbcreatecontrol((void *) &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:
1.97 christos 1128: *mp = sbcreatecontrol((void *) &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;
1.97 christos 1142: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 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: */
1.97 christos 1190: *mp = sbcreatecontrol((void *)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:
1.97 christos 1252: *mp = sbcreatecontrol((void *)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:
1.97 christos 1263: *mp = sbcreatecontrol((void *)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:
1.97 christos 1324: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 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 *
1.107 christos 1343: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1344: {
1345: struct ip6_ext ip6e;
1346: size_t elen;
1347: struct mbuf *n;
1348:
1349: #ifdef DIAGNOSTIC
1350: switch (nxt) {
1351: case IPPROTO_DSTOPTS:
1352: case IPPROTO_ROUTING:
1353: case IPPROTO_HOPOPTS:
1354: case IPPROTO_AH: /* is it possible? */
1355: break;
1356: default:
1357: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1358: }
1.62 itojun 1359: #endif
1.2 itojun 1360:
1.97 christos 1361: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1362: if (nxt == IPPROTO_AH)
1363: elen = (ip6e.ip6e_len + 2) << 2;
1364: else
1365: elen = (ip6e.ip6e_len + 1) << 3;
1366:
1367: MGET(n, M_DONTWAIT, MT_DATA);
1368: if (n && elen >= MLEN) {
1369: MCLGET(n, M_DONTWAIT);
1370: if ((n->m_flags & M_EXT) == 0) {
1371: m_free(n);
1372: n = NULL;
1373: }
1374: }
1375: if (!n)
1376: return NULL;
1377:
1378: n->m_len = 0;
1379: if (elen >= M_TRAILINGSPACE(n)) {
1380: m_free(n);
1381: return NULL;
1382: }
1383:
1.97 christos 1384: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1385: n->m_len = elen;
1386: return n;
1.2 itojun 1387: }
1388:
1389: /*
1390: * Get pointer to the previous header followed by the header
1391: * currently processed.
1392: * XXX: This function supposes that
1393: * M includes all headers,
1394: * the next header field and the header length field of each header
1395: * are valid, and
1396: * the sum of each header length equals to OFF.
1397: * Because of these assumptions, this function must be called very
1398: * carefully. Moreover, it will not be used in the near future when
1399: * we develop `neater' mechanism to process extension headers.
1400: */
1.58 itojun 1401: u_int8_t *
1.107 christos 1402: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1403: {
1404: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1405:
1406: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1407: return (&ip6->ip6_nxt);
1.2 itojun 1408: else {
1409: int len, nxt;
1410: struct ip6_ext *ip6e = NULL;
1411:
1412: nxt = ip6->ip6_nxt;
1413: len = sizeof(struct ip6_hdr);
1414: while (len < off) {
1.97 christos 1415: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1416:
1.35 itojun 1417: switch (nxt) {
1.2 itojun 1418: case IPPROTO_FRAGMENT:
1419: len += sizeof(struct ip6_frag);
1420: break;
1421: case IPPROTO_AH:
1422: len += (ip6e->ip6e_len + 2) << 2;
1423: break;
1424: default:
1425: len += (ip6e->ip6e_len + 1) << 3;
1426: break;
1427: }
1428: nxt = ip6e->ip6e_nxt;
1429: }
1430: if (ip6e)
1.58 itojun 1431: return (&ip6e->ip6e_nxt);
1.2 itojun 1432: else
1433: return NULL;
1.18 itojun 1434: }
1435: }
1436:
1437: /*
1438: * get next header offset. m will be retained.
1439: */
1440: int
1.107 christos 1441: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1442: {
1443: struct ip6_hdr ip6;
1444: struct ip6_ext ip6e;
1445: struct ip6_frag fh;
1446:
1447: /* just in case */
1448: if (m == NULL)
1449: panic("ip6_nexthdr: m == NULL");
1450: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1451: return -1;
1452:
1453: switch (proto) {
1454: case IPPROTO_IPV6:
1.83 rpaulo 1455: /* do not chase beyond intermediate IPv6 headers */
1456: if (off != 0)
1457: return -1;
1.18 itojun 1458: if (m->m_pkthdr.len < off + sizeof(ip6))
1459: return -1;
1.97 christos 1460: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1461: if (nxtp)
1462: *nxtp = ip6.ip6_nxt;
1463: off += sizeof(ip6);
1464: return off;
1465:
1466: case IPPROTO_FRAGMENT:
1467: /*
1468: * terminate parsing if it is not the first fragment,
1469: * it does not make sense to parse through it.
1470: */
1471: if (m->m_pkthdr.len < off + sizeof(fh))
1472: return -1;
1.97 christos 1473: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1474: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1475: return -1;
1476: if (nxtp)
1477: *nxtp = fh.ip6f_nxt;
1478: off += sizeof(struct ip6_frag);
1479: return off;
1480:
1481: case IPPROTO_AH:
1482: if (m->m_pkthdr.len < off + sizeof(ip6e))
1483: return -1;
1.97 christos 1484: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1485: if (nxtp)
1486: *nxtp = ip6e.ip6e_nxt;
1487: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1488: if (m->m_pkthdr.len < off)
1489: return -1;
1.18 itojun 1490: return off;
1491:
1492: case IPPROTO_HOPOPTS:
1493: case IPPROTO_ROUTING:
1494: case IPPROTO_DSTOPTS:
1495: if (m->m_pkthdr.len < off + sizeof(ip6e))
1496: return -1;
1.97 christos 1497: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1498: if (nxtp)
1499: *nxtp = ip6e.ip6e_nxt;
1500: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1501: if (m->m_pkthdr.len < off)
1502: return -1;
1.18 itojun 1503: return off;
1504:
1505: case IPPROTO_NONE:
1506: case IPPROTO_ESP:
1507: case IPPROTO_IPCOMP:
1508: /* give up */
1509: return -1;
1510:
1511: default:
1512: return -1;
1513: }
1514: }
1515:
1516: /*
1517: * get offset for the last header in the chain. m will be kept untainted.
1518: */
1519: int
1.107 christos 1520: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1521: {
1522: int newoff;
1523: int nxt;
1524:
1525: if (!nxtp) {
1526: nxt = -1;
1527: nxtp = &nxt;
1528: }
1.86 rpaulo 1529: for (;;) {
1.18 itojun 1530: newoff = ip6_nexthdr(m, off, proto, nxtp);
1531: if (newoff < 0)
1532: return off;
1533: else if (newoff < off)
1534: return -1; /* invalid */
1535: else if (newoff == off)
1536: return newoff;
1537:
1538: off = newoff;
1539: proto = *nxtp;
1.2 itojun 1540: }
1541: }
1542:
1.81 rpaulo 1543: struct m_tag *
1.107 christos 1544: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1545: {
1546: struct m_tag *mtag;
1547:
1548: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1549: if (!mtag) {
1550: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1551: M_NOWAIT);
1552: if (mtag) {
1553: m_tag_prepend(m, mtag);
1554: bzero(mtag + 1, sizeof(struct ip6aux));
1555: }
1556: }
1557: return mtag;
1558: }
1559:
1560: struct m_tag *
1.107 christos 1561: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1562: {
1563: struct m_tag *mtag;
1564:
1565: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1566: return mtag;
1567: }
1568:
1569: void
1.107 christos 1570: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1571: {
1572: struct m_tag *mtag;
1573:
1574: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1575: if (mtag)
1576: m_tag_delete(m, mtag);
1577: }
1578:
1.98 liamjfoy 1579: #ifdef GATEWAY
1580: /*
1581: * sysctl helper routine for net.inet.ip6.maxflows. Since
1582: * we could reduce this value, call ip6flow_reap();
1583: */
1584: static int
1.101 liamjfoy 1585: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1586: {
1587: int s;
1588:
1589: s = sysctl_lookup(SYSCTLFN_CALL(rnode));
1.100 liamjfoy 1590: if (s || newp == NULL)
1.98 liamjfoy 1591: return (s);
1592:
1593: s = splsoftnet();
1594: ip6flow_reap(0);
1595: splx(s);
1596:
1597: return (0);
1598: }
1.99 liamjfoy 1599:
1600: static int
1601: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1602: {
1603: int error, tmp;
1604: struct sysctlnode node;
1605:
1606: node = *rnode;
1607: tmp = ip6_hashsize;
1608: node.sysctl_data = &tmp;
1609: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1610: if (error || newp == NULL)
1611: return (error);
1612:
1613: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1614: /*
1615: * Can only fail due to malloc()
1616: */
1617: if (ip6flow_invalidate_all(tmp))
1618: return ENOMEM;
1619: } else {
1620: /*
1621: * EINVAL if not a power of 2
1622: */
1623: return EINVAL;
1624: }
1625:
1626: return (0);
1627: }
1.98 liamjfoy 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)"),
1.101 liamjfoy 1918: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1919: CTL_NET, PF_INET6, IPPROTO_IPV6,
1920: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1921: sysctl_createv(clog, 0, NULL, NULL,
1922: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1923: CTLTYPE_INT, "hashsize",
1924: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1925: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1926: CTL_NET, PF_INET6, IPPROTO_IPV6,
1927: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1928: #endif
1.2 itojun 1929: }
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