Annotation of src/sys/netinet6/ip6_input.c, Revision 1.109.4.2
1.109.4.2! joerg 1: /* $NetBSD: ip6_input.c,v 1.109.4.1 2007/10/02 18:29:23 joerg 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>
1.109.4.2! joerg 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.109.4.1 2007/10/02 18:29:23 joerg 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 *);
1.81 rpaulo 152: static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, 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;
1.91 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: */
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 *
1.107 christos 830: ip6_setdstifaddr(struct mbuf *m, struct in6_ifaddr *ia6)
1.81 rpaulo 831: {
832: struct m_tag *mtag;
833:
834: mtag = ip6_addaux(m);
835: if (mtag)
836: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
837: return mtag; /* NULL if failed to set */
838: }
839:
840: struct in6_ifaddr *
1.107 christos 841: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 842: {
843: struct m_tag *mtag;
844:
845: mtag = ip6_findaux(m);
846: if (mtag)
847: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
848: else
849: return NULL;
850: }
851:
852: /*
1.2 itojun 853: * Hop-by-Hop options header processing. If a valid jumbo payload option is
854: * included, the real payload length will be stored in plenp.
1.107 christos 855: *
856: * rtalertp - XXX: should be stored more smart way
1.2 itojun 857: */
858: static int
1.107 christos 859: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
860: struct mbuf **mp, int *offp)
1.2 itojun 861: {
1.35 itojun 862: struct mbuf *m = *mp;
1.2 itojun 863: int off = *offp, hbhlen;
864: struct ip6_hbh *hbh;
865:
866: /* validation of the length of the header */
1.9 itojun 867: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
868: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
869: if (hbh == NULL) {
870: ip6stat.ip6s_tooshort++;
871: return -1;
872: }
873: hbhlen = (hbh->ip6h_len + 1) << 3;
874: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
875: hbhlen);
876: if (hbh == NULL) {
877: ip6stat.ip6s_tooshort++;
878: return -1;
879: }
1.57 thorpej 880: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 881: off += hbhlen;
882: hbhlen -= sizeof(struct ip6_hbh);
883:
884: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
885: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 886: return (-1);
1.2 itojun 887:
888: *offp = off;
889: *mp = m;
1.58 itojun 890: return (0);
1.2 itojun 891: }
892:
893: /*
894: * Search header for all Hop-by-hop options and process each option.
895: * This function is separate from ip6_hopopts_input() in order to
896: * handle a case where the sending node itself process its hop-by-hop
897: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 898: *
899: * The function assumes that hbh header is located right after the IPv6 header
900: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
901: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 902: */
903: int
1.107 christos 904: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
905: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 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;
1.97 christos 940: bcopy((void *)(opt + 2), (void *)&rtalert_val, 2);
1.35 itojun 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
1.107 christos 1037: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1038: {
1039: struct ip6_hdr *ip6;
1040:
1.35 itojun 1041: switch (IP6OPT_TYPE(*optp)) {
1042: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1043: return ((int)*(optp + 1));
1.35 itojun 1044: case IP6OPT_TYPE_DISCARD: /* silently discard */
1045: m_freem(m);
1.58 itojun 1046: return (-1);
1.35 itojun 1047: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1048: ip6stat.ip6s_badoptions++;
1049: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1050: return (-1);
1.35 itojun 1051: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1052: ip6stat.ip6s_badoptions++;
1053: ip6 = mtod(m, struct ip6_hdr *);
1054: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1055: (m->m_flags & (M_BCAST|M_MCAST)))
1056: m_freem(m);
1057: else
1058: icmp6_error(m, ICMP6_PARAM_PROB,
1059: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1060: return (-1);
1.2 itojun 1061: }
1062:
1063: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1064: return (-1);
1.2 itojun 1065: }
1066:
1067: /*
1.9 itojun 1068: * Create the "control" list for this pcb.
1069: *
1070: * The routine will be called from upper layer handlers like tcp6_input().
1071: * Thus the routine assumes that the caller (tcp6_input) have already
1072: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1073: * very first mbuf on the mbuf chain.
1074: * We may want to add some infinite loop prevention or sanity checks for safety.
1075: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1076: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1077: */
1078: void
1.107 christos 1079: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1080: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1081: {
1.85 rpaulo 1082: #ifdef RFC2292
1083: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1084: #else
1085: #define IS2292(x, y) (y)
1086: #endif
1087:
1.9 itojun 1088: #ifdef SO_TIMESTAMP
1.2 itojun 1089: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1090: struct timeval tv;
1091:
1092: microtime(&tv);
1.97 christos 1093: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1094: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1095: if (*mp)
1096: mp = &(*mp)->m_next;
1097: }
1.9 itojun 1098: #endif
1.87 rpaulo 1099:
1100: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1101: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1102: return;
1103:
1.2 itojun 1104: /* RFC 2292 sec. 5 */
1.35 itojun 1105: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1106: struct in6_pktinfo pi6;
1.85 rpaulo 1107:
1.2 itojun 1108: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1109: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1110: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1111: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1112: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1113: sizeof(struct in6_pktinfo),
1114: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1115: if (*mp)
1116: mp = &(*mp)->m_next;
1117: }
1.85 rpaulo 1118:
1.2 itojun 1119: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1120: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1121:
1.97 christos 1122: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1123: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1124: if (*mp)
1125: mp = &(*mp)->m_next;
1126: }
1127:
1128: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1129: u_int32_t flowinfo;
1130: int tclass;
1131:
1132: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1133: flowinfo >>= 20;
1134:
1135: tclass = flowinfo & 0xff;
1.97 christos 1136: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1137: IPV6_TCLASS, IPPROTO_IPV6);
1138:
1.2 itojun 1139: if (*mp)
1140: mp = &(*mp)->m_next;
1141: }
1142:
1143: /*
1.75 itojun 1144: * IPV6_HOPOPTS socket option. Recall that we required super-user
1145: * privilege for the option (see ip6_ctloutput), but it might be too
1146: * strict, since there might be some hop-by-hop options which can be
1147: * returned to normal user.
1.85 rpaulo 1148: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1149: */
1.75 itojun 1150: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1151: /*
1152: * Check if a hop-by-hop options header is contatined in the
1153: * received packet, and if so, store the options as ancillary
1154: * data. Note that a hop-by-hop options header must be
1155: * just after the IPv6 header, which fact is assured through
1156: * the IPv6 input processing.
1157: */
1.78 christos 1158: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1159: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1160: struct ip6_hbh *hbh;
1161: int hbhlen;
1.62 itojun 1162: struct mbuf *ext;
1.9 itojun 1163:
1.62 itojun 1164: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1165: xip6->ip6_nxt);
1.62 itojun 1166: if (ext == NULL) {
1.9 itojun 1167: ip6stat.ip6s_tooshort++;
1168: return;
1169: }
1.62 itojun 1170: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1171: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1172: if (hbhlen != ext->m_len) {
1173: m_freem(ext);
1.9 itojun 1174: ip6stat.ip6s_tooshort++;
1175: return;
1176: }
1.2 itojun 1177:
1178: /*
1179: * XXX: We copy whole the header even if a jumbo
1180: * payload option is included, which option is to
1181: * be removed before returning in the RFC 2292.
1.85 rpaulo 1182: * Note: this constraint is removed in RFC3542.
1.2 itojun 1183: */
1.97 christos 1184: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1185: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1186: IPPROTO_IPV6);
1.2 itojun 1187: if (*mp)
1188: mp = &(*mp)->m_next;
1.62 itojun 1189: m_freem(ext);
1.2 itojun 1190: }
1191: }
1192:
1193: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1194: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1195: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1196: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1197:
1198: /*
1199: * Search for destination options headers or routing
1200: * header(s) through the header chain, and stores each
1201: * header as ancillary data.
1202: * Note that the order of the headers remains in
1203: * the chain of ancillary data.
1204: */
1.86 rpaulo 1205: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1206: struct ip6_ext *ip6e = NULL;
1.9 itojun 1207: int elen;
1.62 itojun 1208: struct mbuf *ext = NULL;
1.9 itojun 1209:
1.62 itojun 1210: /*
1211: * if it is not an extension header, don't try to
1212: * pull it from the chain.
1213: */
1214: switch (nxt) {
1215: case IPPROTO_DSTOPTS:
1216: case IPPROTO_ROUTING:
1217: case IPPROTO_HOPOPTS:
1218: case IPPROTO_AH: /* is it possible? */
1219: break;
1220: default:
1221: goto loopend;
1222: }
1223:
1224: ext = ip6_pullexthdr(m, off, nxt);
1225: if (ext == NULL) {
1.9 itojun 1226: ip6stat.ip6s_tooshort++;
1227: return;
1228: }
1.62 itojun 1229: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1230: if (nxt == IPPROTO_AH)
1231: elen = (ip6e->ip6e_len + 2) << 2;
1232: else
1233: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1234: if (elen != ext->m_len) {
1235: m_freem(ext);
1.9 itojun 1236: ip6stat.ip6s_tooshort++;
1237: return;
1238: }
1.57 thorpej 1239: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1240:
1.35 itojun 1241: switch (nxt) {
1.62 itojun 1242: case IPPROTO_DSTOPTS:
1.35 itojun 1243: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1244: break;
1245:
1.97 christos 1246: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1247: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1248: IPPROTO_IPV6);
1.35 itojun 1249: if (*mp)
1250: mp = &(*mp)->m_next;
1251: break;
1252:
1253: case IPPROTO_ROUTING:
1254: if (!in6p->in6p_flags & IN6P_RTHDR)
1255: break;
1256:
1.97 christos 1257: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1258: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1259: IPPROTO_IPV6);
1.35 itojun 1260: if (*mp)
1261: mp = &(*mp)->m_next;
1262: break;
1263:
1.62 itojun 1264: case IPPROTO_HOPOPTS:
1265: case IPPROTO_AH: /* is it possible? */
1266: break;
1267:
1.35 itojun 1268: default:
1269: /*
1.62 itojun 1270: * other cases have been filtered in the above.
1271: * none will visit this case. here we supply
1272: * the code just in case (nxt overwritten or
1273: * other cases).
1.35 itojun 1274: */
1.62 itojun 1275: m_freem(ext);
1.35 itojun 1276: goto loopend;
1277:
1.2 itojun 1278: }
1279:
1280: /* proceed with the next header. */
1.9 itojun 1281: off += elen;
1.2 itojun 1282: nxt = ip6e->ip6e_nxt;
1.62 itojun 1283: ip6e = NULL;
1284: m_freem(ext);
1285: ext = NULL;
1.2 itojun 1286: }
1287: loopend:
1.62 itojun 1288: ;
1.2 itojun 1289: }
1.62 itojun 1290: }
1.85 rpaulo 1291: #undef IS2292
1292:
1293:
1294: void
1.95 dyoung 1295: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1296: uint32_t *mtu)
1.85 rpaulo 1297: {
1298: struct socket *so;
1299: struct mbuf *m_mtu;
1300: struct ip6_mtuinfo mtuctl;
1301:
1302: so = in6p->in6p_socket;
1303:
1304: if (mtu == NULL)
1305: return;
1306:
1307: #ifdef DIAGNOSTIC
1308: if (so == NULL) /* I believe this is impossible */
1309: panic("ip6_notify_pmtu: socket is NULL");
1310: #endif
1311:
1312: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1313: mtuctl.ip6m_mtu = *mtu;
1314: mtuctl.ip6m_addr = *dst;
1315: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1316: return;
1317:
1.97 christos 1318: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1319: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1320: return;
1321:
1.95 dyoung 1322: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1323: == 0) {
1324: m_freem(m_mtu);
1325: /* XXX: should count statistics */
1326: } else
1327: sorwakeup(so);
1328:
1329: return;
1330: }
1.62 itojun 1331:
1332: /*
1333: * pull single extension header from mbuf chain. returns single mbuf that
1334: * contains the result, or NULL on error.
1335: */
1336: static struct mbuf *
1.107 christos 1337: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1338: {
1339: struct ip6_ext ip6e;
1340: size_t elen;
1341: struct mbuf *n;
1342:
1343: #ifdef DIAGNOSTIC
1344: switch (nxt) {
1345: case IPPROTO_DSTOPTS:
1346: case IPPROTO_ROUTING:
1347: case IPPROTO_HOPOPTS:
1348: case IPPROTO_AH: /* is it possible? */
1349: break;
1350: default:
1351: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1352: }
1.62 itojun 1353: #endif
1.2 itojun 1354:
1.97 christos 1355: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1356: if (nxt == IPPROTO_AH)
1357: elen = (ip6e.ip6e_len + 2) << 2;
1358: else
1359: elen = (ip6e.ip6e_len + 1) << 3;
1360:
1361: MGET(n, M_DONTWAIT, MT_DATA);
1362: if (n && elen >= MLEN) {
1363: MCLGET(n, M_DONTWAIT);
1364: if ((n->m_flags & M_EXT) == 0) {
1365: m_free(n);
1366: n = NULL;
1367: }
1368: }
1369: if (!n)
1370: return NULL;
1371:
1372: n->m_len = 0;
1373: if (elen >= M_TRAILINGSPACE(n)) {
1374: m_free(n);
1375: return NULL;
1376: }
1377:
1.97 christos 1378: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1379: n->m_len = elen;
1380: return n;
1.2 itojun 1381: }
1382:
1383: /*
1384: * Get pointer to the previous header followed by the header
1385: * currently processed.
1386: * XXX: This function supposes that
1387: * M includes all headers,
1388: * the next header field and the header length field of each header
1389: * are valid, and
1390: * the sum of each header length equals to OFF.
1391: * Because of these assumptions, this function must be called very
1392: * carefully. Moreover, it will not be used in the near future when
1393: * we develop `neater' mechanism to process extension headers.
1394: */
1.58 itojun 1395: u_int8_t *
1.107 christos 1396: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1397: {
1398: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1399:
1400: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1401: return (&ip6->ip6_nxt);
1.2 itojun 1402: else {
1403: int len, nxt;
1404: struct ip6_ext *ip6e = NULL;
1405:
1406: nxt = ip6->ip6_nxt;
1407: len = sizeof(struct ip6_hdr);
1408: while (len < off) {
1.97 christos 1409: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1410:
1.35 itojun 1411: switch (nxt) {
1.2 itojun 1412: case IPPROTO_FRAGMENT:
1413: len += sizeof(struct ip6_frag);
1414: break;
1415: case IPPROTO_AH:
1416: len += (ip6e->ip6e_len + 2) << 2;
1417: break;
1418: default:
1419: len += (ip6e->ip6e_len + 1) << 3;
1420: break;
1421: }
1422: nxt = ip6e->ip6e_nxt;
1423: }
1424: if (ip6e)
1.58 itojun 1425: return (&ip6e->ip6e_nxt);
1.2 itojun 1426: else
1427: return NULL;
1.18 itojun 1428: }
1429: }
1430:
1431: /*
1432: * get next header offset. m will be retained.
1433: */
1434: int
1.107 christos 1435: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1436: {
1437: struct ip6_hdr ip6;
1438: struct ip6_ext ip6e;
1439: struct ip6_frag fh;
1440:
1441: /* just in case */
1442: if (m == NULL)
1443: panic("ip6_nexthdr: m == NULL");
1444: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1445: return -1;
1446:
1447: switch (proto) {
1448: case IPPROTO_IPV6:
1.83 rpaulo 1449: /* do not chase beyond intermediate IPv6 headers */
1450: if (off != 0)
1451: return -1;
1.18 itojun 1452: if (m->m_pkthdr.len < off + sizeof(ip6))
1453: return -1;
1.97 christos 1454: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1455: if (nxtp)
1456: *nxtp = ip6.ip6_nxt;
1457: off += sizeof(ip6);
1458: return off;
1459:
1460: case IPPROTO_FRAGMENT:
1461: /*
1462: * terminate parsing if it is not the first fragment,
1463: * it does not make sense to parse through it.
1464: */
1465: if (m->m_pkthdr.len < off + sizeof(fh))
1466: return -1;
1.97 christos 1467: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1468: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1469: return -1;
1470: if (nxtp)
1471: *nxtp = fh.ip6f_nxt;
1472: off += sizeof(struct ip6_frag);
1473: return off;
1474:
1475: case IPPROTO_AH:
1476: if (m->m_pkthdr.len < off + sizeof(ip6e))
1477: return -1;
1.97 christos 1478: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1479: if (nxtp)
1480: *nxtp = ip6e.ip6e_nxt;
1481: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1482: if (m->m_pkthdr.len < off)
1483: return -1;
1.18 itojun 1484: return off;
1485:
1486: case IPPROTO_HOPOPTS:
1487: case IPPROTO_ROUTING:
1488: case IPPROTO_DSTOPTS:
1489: if (m->m_pkthdr.len < off + sizeof(ip6e))
1490: return -1;
1.97 christos 1491: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1492: if (nxtp)
1493: *nxtp = ip6e.ip6e_nxt;
1494: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1495: if (m->m_pkthdr.len < off)
1496: return -1;
1.18 itojun 1497: return off;
1498:
1499: case IPPROTO_NONE:
1500: case IPPROTO_ESP:
1501: case IPPROTO_IPCOMP:
1502: /* give up */
1503: return -1;
1504:
1505: default:
1506: return -1;
1507: }
1508: }
1509:
1510: /*
1511: * get offset for the last header in the chain. m will be kept untainted.
1512: */
1513: int
1.107 christos 1514: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1515: {
1516: int newoff;
1517: int nxt;
1518:
1519: if (!nxtp) {
1520: nxt = -1;
1521: nxtp = &nxt;
1522: }
1.86 rpaulo 1523: for (;;) {
1.18 itojun 1524: newoff = ip6_nexthdr(m, off, proto, nxtp);
1525: if (newoff < 0)
1526: return off;
1527: else if (newoff < off)
1528: return -1; /* invalid */
1529: else if (newoff == off)
1530: return newoff;
1531:
1532: off = newoff;
1533: proto = *nxtp;
1.2 itojun 1534: }
1535: }
1536:
1.81 rpaulo 1537: struct m_tag *
1.107 christos 1538: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1539: {
1540: struct m_tag *mtag;
1541:
1542: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1543: if (!mtag) {
1544: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1545: M_NOWAIT);
1546: if (mtag) {
1547: m_tag_prepend(m, mtag);
1548: bzero(mtag + 1, sizeof(struct ip6aux));
1549: }
1550: }
1551: return mtag;
1552: }
1553:
1554: struct m_tag *
1.107 christos 1555: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1556: {
1557: struct m_tag *mtag;
1558:
1559: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1560: return mtag;
1561: }
1562:
1563: void
1.107 christos 1564: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1565: {
1566: struct m_tag *mtag;
1567:
1568: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1569: if (mtag)
1570: m_tag_delete(m, mtag);
1571: }
1572:
1.98 liamjfoy 1573: #ifdef GATEWAY
1574: /*
1575: * sysctl helper routine for net.inet.ip6.maxflows. Since
1576: * we could reduce this value, call ip6flow_reap();
1577: */
1578: static int
1.101 liamjfoy 1579: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1580: {
1581: int s;
1582:
1583: s = sysctl_lookup(SYSCTLFN_CALL(rnode));
1.100 liamjfoy 1584: if (s || newp == NULL)
1.98 liamjfoy 1585: return (s);
1586:
1587: s = splsoftnet();
1588: ip6flow_reap(0);
1589: splx(s);
1590:
1591: return (0);
1592: }
1.99 liamjfoy 1593:
1594: static int
1595: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1596: {
1597: int error, tmp;
1598: struct sysctlnode node;
1599:
1600: node = *rnode;
1601: tmp = ip6_hashsize;
1602: node.sysctl_data = &tmp;
1603: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1604: if (error || newp == NULL)
1605: return (error);
1606:
1607: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1608: /*
1609: * Can only fail due to malloc()
1610: */
1611: if (ip6flow_invalidate_all(tmp))
1612: return ENOMEM;
1613: } else {
1614: /*
1615: * EINVAL if not a power of 2
1616: */
1617: return EINVAL;
1618: }
1619:
1620: return (0);
1621: }
1.98 liamjfoy 1622: #endif /* GATEWAY */
1623:
1.2 itojun 1624: /*
1625: * System control for IP6
1626: */
1627:
1628: u_char inet6ctlerrmap[PRC_NCMDS] = {
1629: 0, 0, 0, 0,
1630: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1631: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1632: EMSGSIZE, EHOSTUNREACH, 0, 0,
1633: 0, 0, 0, 0,
1634: ENOPROTOOPT
1635: };
1636:
1.70 atatat 1637: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1638: {
1.85 rpaulo 1639: #ifdef RFC2292
1640: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1641: #else
1642: #define IS2292(x, y) (y)
1643: #endif
1.26 itojun 1644:
1.73 atatat 1645: sysctl_createv(clog, 0, NULL, NULL,
1646: CTLFLAG_PERMANENT,
1.70 atatat 1647: CTLTYPE_NODE, "net", NULL,
1648: NULL, 0, NULL, 0,
1649: CTL_NET, CTL_EOL);
1.73 atatat 1650: sysctl_createv(clog, 0, NULL, NULL,
1651: CTLFLAG_PERMANENT,
1.74 atatat 1652: CTLTYPE_NODE, "inet6",
1653: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1654: NULL, 0, NULL, 0,
1655: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1656: sysctl_createv(clog, 0, NULL, NULL,
1657: CTLFLAG_PERMANENT,
1.74 atatat 1658: CTLTYPE_NODE, "ip6",
1659: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1660: NULL, 0, NULL, 0,
1661: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1662:
1.73 atatat 1663: sysctl_createv(clog, 0, NULL, NULL,
1664: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1665: CTLTYPE_INT, "forwarding",
1666: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1667: NULL, 0, &ip6_forwarding, 0,
1668: CTL_NET, PF_INET6, IPPROTO_IPV6,
1669: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1670: sysctl_createv(clog, 0, NULL, NULL,
1671: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1672: CTLTYPE_INT, "redirect",
1673: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1674: NULL, 0, &ip6_sendredirects, 0,
1675: CTL_NET, PF_INET6, IPPROTO_IPV6,
1676: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1677: sysctl_createv(clog, 0, NULL, NULL,
1678: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1679: CTLTYPE_INT, "hlim",
1680: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1681: NULL, 0, &ip6_defhlim, 0,
1682: CTL_NET, PF_INET6, IPPROTO_IPV6,
1683: IPV6CTL_DEFHLIM, CTL_EOL);
1684: #ifdef notyet
1.73 atatat 1685: sysctl_createv(clog, 0, NULL, NULL,
1686: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1687: CTLTYPE_INT, "mtu", NULL,
1688: NULL, 0, &, 0,
1689: CTL_NET, PF_INET6, IPPROTO_IPV6,
1690: IPV6CTL_DEFMTU, CTL_EOL);
1691: #endif
1692: #ifdef __no_idea__
1.73 atatat 1693: sysctl_createv(clog, 0, NULL, NULL,
1694: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1695: CTLTYPE_INT, "forwsrcrt", NULL,
1696: NULL, 0, &?, 0,
1697: CTL_NET, PF_INET6, IPPROTO_IPV6,
1698: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1699: sysctl_createv(clog, 0, NULL, NULL,
1700: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1701: CTLTYPE_STRUCT, "mrtstats", NULL,
1702: NULL, 0, &?, sizeof(?),
1703: CTL_NET, PF_INET6, IPPROTO_IPV6,
1704: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1705: sysctl_createv(clog, 0, NULL, NULL,
1706: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1707: CTLTYPE_?, "mrtproto", NULL,
1708: NULL, 0, &?, sizeof(?),
1709: CTL_NET, PF_INET6, IPPROTO_IPV6,
1710: IPV6CTL_MRTPROTO, CTL_EOL);
1711: #endif
1.73 atatat 1712: sysctl_createv(clog, 0, NULL, NULL,
1713: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1714: CTLTYPE_INT, "maxfragpackets",
1715: SYSCTL_DESCR("Maximum number of fragments to buffer "
1716: "for reassembly"),
1.70 atatat 1717: NULL, 0, &ip6_maxfragpackets, 0,
1718: CTL_NET, PF_INET6, IPPROTO_IPV6,
1719: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1720: #ifdef __no_idea__
1.73 atatat 1721: sysctl_createv(clog, 0, NULL, NULL,
1722: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1723: CTLTYPE_INT, "sourcecheck", NULL,
1724: NULL, 0, &?, 0,
1725: CTL_NET, PF_INET6, IPPROTO_IPV6,
1726: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1727: sysctl_createv(clog, 0, NULL, NULL,
1728: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1729: CTLTYPE_INT, "sourcecheck_logint", NULL,
1730: NULL, 0, &?, 0,
1731: CTL_NET, PF_INET6, IPPROTO_IPV6,
1732: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1733: #endif
1.73 atatat 1734: sysctl_createv(clog, 0, NULL, NULL,
1735: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1736: CTLTYPE_INT, "accept_rtadv",
1737: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1738: NULL, 0, &ip6_accept_rtadv, 0,
1739: CTL_NET, PF_INET6, IPPROTO_IPV6,
1740: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1741: sysctl_createv(clog, 0, NULL, NULL,
1742: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1743: CTLTYPE_INT, "keepfaith",
1744: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1745: NULL, 0, &ip6_keepfaith, 0,
1746: CTL_NET, PF_INET6, IPPROTO_IPV6,
1747: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1748: sysctl_createv(clog, 0, NULL, NULL,
1749: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1750: CTLTYPE_INT, "log_interval",
1751: SYSCTL_DESCR("Minumum interval between logging "
1752: "unroutable packets"),
1.70 atatat 1753: NULL, 0, &ip6_log_interval, 0,
1754: CTL_NET, PF_INET6, IPPROTO_IPV6,
1755: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1756: sysctl_createv(clog, 0, NULL, NULL,
1757: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1758: CTLTYPE_INT, "hdrnestlimit",
1759: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1760: NULL, 0, &ip6_hdrnestlimit, 0,
1761: CTL_NET, PF_INET6, IPPROTO_IPV6,
1762: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1763: sysctl_createv(clog, 0, NULL, NULL,
1764: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1765: CTLTYPE_INT, "dad_count",
1766: SYSCTL_DESCR("Number of Duplicate Address Detection "
1767: "probes to send"),
1.70 atatat 1768: NULL, 0, &ip6_dad_count, 0,
1769: CTL_NET, PF_INET6, IPPROTO_IPV6,
1770: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1771: sysctl_createv(clog, 0, NULL, NULL,
1772: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1773: CTLTYPE_INT, "auto_flowlabel",
1774: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1775: NULL, 0, &ip6_auto_flowlabel, 0,
1776: CTL_NET, PF_INET6, IPPROTO_IPV6,
1777: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1778: sysctl_createv(clog, 0, NULL, NULL,
1779: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1780: CTLTYPE_INT, "defmcasthlim",
1781: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1782: NULL, 0, &ip6_defmcasthlim, 0,
1783: CTL_NET, PF_INET6, IPPROTO_IPV6,
1784: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1785: #if NGIF > 0
1.73 atatat 1786: sysctl_createv(clog, 0, NULL, NULL,
1787: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1788: CTLTYPE_INT, "gifhlim",
1789: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1790: NULL, 0, &ip6_gif_hlim, 0,
1791: CTL_NET, PF_INET6, IPPROTO_IPV6,
1792: IPV6CTL_GIF_HLIM, CTL_EOL);
1793: #endif /* NGIF */
1.73 atatat 1794: sysctl_createv(clog, 0, NULL, NULL,
1795: CTLFLAG_PERMANENT,
1.74 atatat 1796: CTLTYPE_STRING, "kame_version",
1797: SYSCTL_DESCR("KAME Version"),
1.78 christos 1798: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1799: CTL_NET, PF_INET6, IPPROTO_IPV6,
1800: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1801: sysctl_createv(clog, 0, NULL, NULL,
1802: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1803: CTLTYPE_INT, "use_deprecated",
1804: SYSCTL_DESCR("Allow use of deprecated addresses as "
1805: "source addresses"),
1.70 atatat 1806: NULL, 0, &ip6_use_deprecated, 0,
1807: CTL_NET, PF_INET6, IPPROTO_IPV6,
1808: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1809: sysctl_createv(clog, 0, NULL, NULL,
1810: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1811: CTLTYPE_INT, "rr_prune", NULL,
1812: NULL, 0, &ip6_rr_prune, 0,
1813: CTL_NET, PF_INET6, IPPROTO_IPV6,
1814: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1815: sysctl_createv(clog, 0, NULL, NULL,
1816: CTLFLAG_PERMANENT
1.70 atatat 1817: #ifndef INET6_BINDV6ONLY
1.73 atatat 1818: |CTLFLAG_READWRITE,
1.70 atatat 1819: #endif
1.74 atatat 1820: CTLTYPE_INT, "v6only",
1821: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1822: "to PF_INET sockets"),
1.70 atatat 1823: NULL, 0, &ip6_v6only, 0,
1824: CTL_NET, PF_INET6, IPPROTO_IPV6,
1825: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1826: sysctl_createv(clog, 0, NULL, NULL,
1827: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1828: CTLTYPE_INT, "anonportmin",
1829: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1830: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1831: CTL_NET, PF_INET6, IPPROTO_IPV6,
1832: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1833: sysctl_createv(clog, 0, NULL, NULL,
1834: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1835: CTLTYPE_INT, "anonportmax",
1836: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1837: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1838: CTL_NET, PF_INET6, IPPROTO_IPV6,
1839: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1840: #ifndef IPNOPRIVPORTS
1.73 atatat 1841: sysctl_createv(clog, 0, NULL, NULL,
1842: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1843: CTLTYPE_INT, "lowportmin",
1844: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1845: "to assign"),
1.70 atatat 1846: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1847: CTL_NET, PF_INET6, IPPROTO_IPV6,
1848: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1849: sysctl_createv(clog, 0, NULL, NULL,
1850: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1851: CTLTYPE_INT, "lowportmax",
1852: SYSCTL_DESCR("Highest privileged ephemeral port number "
1853: "to assign"),
1.70 atatat 1854: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1855: CTL_NET, PF_INET6, IPPROTO_IPV6,
1856: IPV6CTL_LOWPORTMAX, CTL_EOL);
1857: #endif /* IPNOPRIVPORTS */
1.73 atatat 1858: sysctl_createv(clog, 0, NULL, NULL,
1859: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1860: CTLTYPE_INT, "use_tempaddr",
1861: SYSCTL_DESCR("Use temporary address"),
1862: NULL, 0, &ip6_use_tempaddr, 0,
1863: CTL_NET, PF_INET6, IPPROTO_IPV6,
1864: CTL_CREATE, CTL_EOL);
1865: sysctl_createv(clog, 0, NULL, NULL,
1866: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1867: CTLTYPE_INT, "temppltime",
1868: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1869: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1870: CTL_NET, PF_INET6, IPPROTO_IPV6,
1871: CTL_CREATE, CTL_EOL);
1872: sysctl_createv(clog, 0, NULL, NULL,
1873: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1874: CTLTYPE_INT, "tempvltime",
1875: SYSCTL_DESCR("valid lifetime of a temporary address"),
1876: NULL, 0, &ip6_temp_valid_lifetime, 0,
1877: CTL_NET, PF_INET6, IPPROTO_IPV6,
1878: CTL_CREATE, CTL_EOL);
1879: sysctl_createv(clog, 0, NULL, NULL,
1880: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1881: CTLTYPE_INT, "maxfrags",
1882: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1883: NULL, 0, &ip6_maxfrags, 0,
1884: CTL_NET, PF_INET6, IPPROTO_IPV6,
1885: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1886: sysctl_createv(clog, 0, NULL, NULL,
1887: CTLFLAG_PERMANENT,
1888: CTLTYPE_STRUCT, "stats",
1889: SYSCTL_DESCR("IPv6 statistics"),
1890: NULL, 0, &ip6stat, sizeof(ip6stat),
1891: CTL_NET, PF_INET6, IPPROTO_IPV6,
1892: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1893: sysctl_createv(clog, 0, NULL, NULL,
1894: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1895: CTLTYPE_INT, "use_defaultzone",
1896: SYSCTL_DESCR("Whether to use the default scope zones"),
1897: NULL, 0, &ip6_use_defzone, 0,
1898: CTL_NET, PF_INET6, IPPROTO_IPV6,
1899: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1900: sysctl_createv(clog, 0, NULL, NULL,
1901: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1902: CTLTYPE_INT, "mcast_pmtu",
1903: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1904: NULL, 0, &ip6_mcast_pmtu, 0,
1905: CTL_NET, PF_INET6, IPPROTO_IPV6,
1906: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1907: #ifdef GATEWAY
1908: sysctl_createv(clog, 0, NULL, NULL,
1909: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1910: CTLTYPE_INT, "maxflows",
1911: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.101 liamjfoy 1912: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1913: CTL_NET, PF_INET6, IPPROTO_IPV6,
1914: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1915: sysctl_createv(clog, 0, NULL, NULL,
1916: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1917: CTLTYPE_INT, "hashsize",
1918: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1919: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1920: CTL_NET, PF_INET6, IPPROTO_IPV6,
1921: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1922: #endif
1.2 itojun 1923: }
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