Annotation of src/sys/netinet6/ip6_input.c, Revision 1.98.2.6
1.98.2.6! ad 1: /* $NetBSD: ip6_input.c,v 1.98.2.5 2007/08/20 21:28:05 ad Exp $ */
1.40 itojun 2: /* $KAME: ip6_input.c,v 1.188 2001/03/29 05:34:31 itojun Exp $ */
1.3 thorpej 3:
1.2 itojun 4: /*
5: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6: * All rights reserved.
1.21 itojun 7: *
1.2 itojun 8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the project nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
1.21 itojun 19: *
1.2 itojun 20: * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: /*
34: * Copyright (c) 1982, 1986, 1988, 1993
35: * The Regents of the University of California. All rights reserved.
36: *
37: * Redistribution and use in source and binary forms, with or without
38: * modification, are permitted provided that the following conditions
39: * are met:
40: * 1. Redistributions of source code must retain the above copyright
41: * notice, this list of conditions and the following disclaimer.
42: * 2. Redistributions in binary form must reproduce the above copyright
43: * notice, this list of conditions and the following disclaimer in the
44: * documentation and/or other materials provided with the distribution.
1.65 agc 45: * 3. Neither the name of the University nor the names of its contributors
1.2 itojun 46: * may be used to endorse or promote products derived from this software
47: * without specific prior written permission.
48: *
49: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59: * SUCH DAMAGE.
60: *
61: * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
62: */
1.48 lukem 63:
64: #include <sys/cdefs.h>
1.98.2.6! ad 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.98.2.5 2007/08/20 21:28:05 ad 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:
1.98.2.4 yamt 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:
151: static void ip6_init2 __P((void *));
1.81 rpaulo 152: static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *));
1.2 itojun 153:
1.5 itojun 154: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
1.62 itojun 155: static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));
1.2 itojun 156:
157: /*
158: * IP6 initialization: fill in IP6 protocol switch table.
159: * All protocols not implemented in kernel go to raw IP6 protocol handler.
160: */
161: void
162: ip6_init()
163: {
1.78 christos 164: const struct ip6protosw *pr;
1.35 itojun 165: int i;
1.2 itojun 166:
1.78 christos 167: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 168: if (pr == 0)
169: panic("ip6_init");
170: for (i = 0; i < IPPROTO_MAX; i++)
171: ip6_protox[i] = pr - inet6sw;
1.78 christos 172: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
173: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 174: if (pr->pr_domain->dom_family == PF_INET6 &&
175: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
176: ip6_protox[pr->pr_protocol] = pr - inet6sw;
177: ip6intrq.ifq_maxlen = ip6qmaxlen;
1.81 rpaulo 178: scope6_init();
179: addrsel_policy_init();
1.2 itojun 180: nd6_init();
181: frag6_init();
1.83 rpaulo 182: ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 183:
184: ip6_init2((void *)0);
1.98 liamjfoy 185: #ifdef GATEWAY
1.98.2.1 ad 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 */
1.98.2.3 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 */
1.98.2.3 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:
1.98.2.2 ad 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;
1.98.2.2 ad 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;
1.98.2.2 ad 249: int nxt, ours = 0, rh_present = 0;
1.9 itojun 250: struct ifnet *deliverifp = NULL;
1.64 itojun 251: int srcrt = 0;
1.98.2.2 ad 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:
1.98.2.2 ad 482: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
483:
1.2 itojun 484: /*
485: * Unicast check
486: */
1.98.2.2 ad 487: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
488: if (hit)
1.25 itojun 489: ip6stat.ip6s_forward_cachehit++;
1.98.2.2 ad 490: else
1.93 joerg 491: ip6stat.ip6s_forward_cachemiss++;
1.22 itojun 492:
1.98.2.5 ad 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: */
1.98.2.2 ad 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: */
1.98.2.5 ad 513: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 514: #endif
1.98.2.2 ad 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) {
1.98.2.2 ad 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;
1.98.2.2 ad 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: */
593: if (deliverifp && !ip6_getdstifaddr(m)) {
594: struct in6_ifaddr *ia6;
595:
596: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
597: if (ia6) {
598: if (!ip6_setdstifaddr(m, ia6)) {
599: /*
600: * XXX maybe we should drop the packet here,
601: * as we could not provide enough information
602: * to the upper layers.
603: */
604: }
605: }
606: }
607:
608: /*
1.2 itojun 609: * Process Hop-by-Hop options header if it's contained.
610: * m may be modified in ip6_hopopts_input().
611: * If a JumboPayload option is included, plen will also be modified.
612: */
613: plen = (u_int32_t)ntohs(ip6->ip6_plen);
614: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 615: struct ip6_hbh *hbh;
616:
617: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
618: #if 0 /*touches NULL pointer*/
619: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
620: #endif
1.2 itojun 621: return; /* m have already been freed */
1.9 itojun 622: }
1.22 itojun 623:
1.2 itojun 624: /* adjust pointer */
625: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 626:
627: /*
1.49 itojun 628: * if the payload length field is 0 and the next header field
1.22 itojun 629: * indicates Hop-by-Hop Options header, then a Jumbo Payload
630: * option MUST be included.
631: */
632: if (ip6->ip6_plen == 0 && plen == 0) {
633: /*
634: * Note that if a valid jumbo payload option is
1.83 rpaulo 635: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 636: * (non-zero) payload length to the variable plen.
1.22 itojun 637: */
638: ip6stat.ip6s_badoptions++;
639: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
640: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
641: icmp6_error(m, ICMP6_PARAM_PROB,
642: ICMP6_PARAMPROB_HEADER,
1.97 christos 643: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 644: return;
645: }
1.9 itojun 646: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
647: sizeof(struct ip6_hbh));
648: if (hbh == NULL) {
649: ip6stat.ip6s_tooshort++;
650: return;
651: }
1.57 thorpej 652: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 653: nxt = hbh->ip6h_nxt;
1.2 itojun 654:
655: /*
656: * accept the packet if a router alert option is included
657: * and we act as an IPv6 router.
658: */
1.5 itojun 659: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 660: ours = 1;
661: } else
662: nxt = ip6->ip6_nxt;
663:
664: /*
665: * Check that the amount of data in the buffers
666: * is as at least much as the IPv6 header would have us expect.
667: * Trim mbufs if longer than we expect.
668: * Drop packet if shorter than we expect.
669: */
670: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
671: ip6stat.ip6s_tooshort++;
1.9 itojun 672: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 673: goto bad;
674: }
675: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
676: if (m->m_len == m->m_pkthdr.len) {
677: m->m_len = sizeof(struct ip6_hdr) + plen;
678: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
679: } else
680: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
681: }
682:
683: /*
684: * Forward if desirable.
685: */
686: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
687: /*
688: * If we are acting as a multicast router, all
689: * incoming multicast packets are passed to the
690: * kernel-level multicast forwarding function.
691: * The packet is returned (relatively) intact; if
692: * ip6_mforward() returns a non-zero value, the packet
693: * must be discarded, else it may be accepted below.
694: */
695: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
696: ip6stat.ip6s_cantforward++;
697: m_freem(m);
698: return;
699: }
700: if (!ours) {
701: m_freem(m);
702: return;
703: }
1.22 itojun 704: } else if (!ours) {
1.64 itojun 705: ip6_forward(m, srcrt);
1.2 itojun 706: return;
1.56 itojun 707: }
1.25 itojun 708:
709: ip6 = mtod(m, struct ip6_hdr *);
710:
711: /*
712: * Malicious party may be able to use IPv4 mapped addr to confuse
713: * tcp/udp stack and bypass security checks (act as if it was from
714: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
715: *
716: * For SIIT end node behavior, you may want to disable the check.
717: * However, you will become vulnerable to attacks using IPv4 mapped
718: * source.
719: */
720: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
721: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
722: ip6stat.ip6s_badscope++;
723: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
724: goto bad;
725: }
1.2 itojun 726:
727: /*
728: * Tell launch routine the next header
729: */
1.12 itojun 730: #ifdef IFA_STATS
1.28 itojun 731: if (deliverifp != NULL) {
1.9 itojun 732: struct in6_ifaddr *ia6;
733: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
734: if (ia6)
735: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
736: }
737: #endif
1.2 itojun 738: ip6stat.ip6s_delivered++;
1.9 itojun 739: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 740: nest = 0;
1.40 itojun 741:
1.98.2.2 ad 742: rh_present = 0;
1.2 itojun 743: while (nxt != IPPROTO_DONE) {
744: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
745: ip6stat.ip6s_toomanyhdr++;
1.98.2.2 ad 746: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 747: goto bad;
748: }
1.8 itojun 749:
750: /*
751: * protection against faulty packet - there should be
752: * more sanity checks in header chain processing.
753: */
754: if (m->m_pkthdr.len < off) {
755: ip6stat.ip6s_tooshort++;
1.9 itojun 756: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 757: goto bad;
758: }
759:
1.98.2.2 ad 760: if (nxt == IPPROTO_ROUTING) {
761: if (rh_present++) {
762: in6_ifstat_inc(m->m_pkthdr.rcvif,
763: ifs6_in_hdrerr);
764: ip6stat.ip6s_badoptions++;
765: goto bad;
766: }
767: }
768:
1.37 itojun 769: #ifdef IPSEC
770: /*
771: * enforce IPsec policy checking if we are seeing last header.
772: * note that we do not visit this with protocols with pcb layer
773: * code - like udp/tcp/raw ip.
774: */
775: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
776: ipsec6_in_reject(m, NULL)) {
777: ipsec6stat.in_polvio++;
778: goto bad;
779: }
780: #endif
1.94 degroote 781: #ifdef FAST_IPSEC
782: /*
783: * enforce IPsec policy checking if we are seeing last header.
784: * note that we do not visit this with protocols with pcb layer
785: * code - like udp/tcp/raw ip.
786: */
787: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
788: /*
789: * Check if the packet has already had IPsec processing
790: * done. If so, then just pass it along. This tag gets
791: * set during AH, ESP, etc. input handling, before the
792: * packet is returned to the ip input queue for delivery.
793: */
794: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
795: s = splsoftnet();
796: if (mtag != NULL) {
797: tdbi = (struct tdb_ident *)(mtag + 1);
798: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
799: } else {
800: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
801: IP_FORWARDING, &error);
802: }
803: if (sp != NULL) {
804: /*
805: * Check security policy against packet attributes.
806: */
807: error = ipsec_in_reject(sp, m);
808: KEY_FREESP(&sp);
809: } else {
810: /* XXX error stat??? */
811: error = EINVAL;
812: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
813: }
814: splx(s);
815: if (error)
816: goto bad;
817: }
818: #endif /* FAST_IPSEC */
819:
1.56 itojun 820:
1.2 itojun 821: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
822: }
823: return;
824: bad:
825: m_freem(m);
826: }
827:
828: /*
1.81 rpaulo 829: * set/grab in6_ifaddr correspond to IPv6 destination address.
830: */
831: static struct m_tag *
1.98.2.2 ad 832: ip6_setdstifaddr(struct mbuf *m, struct in6_ifaddr *ia6)
1.81 rpaulo 833: {
834: struct m_tag *mtag;
835:
836: mtag = ip6_addaux(m);
837: if (mtag)
838: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
839: return mtag; /* NULL if failed to set */
840: }
841:
842: struct in6_ifaddr *
1.98.2.2 ad 843: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 844: {
845: struct m_tag *mtag;
846:
847: mtag = ip6_findaux(m);
848: if (mtag)
849: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
850: else
851: return NULL;
852: }
853:
854: /*
1.2 itojun 855: * Hop-by-Hop options header processing. If a valid jumbo payload option is
856: * included, the real payload length will be stored in plenp.
1.98.2.2 ad 857: *
858: * rtalertp - XXX: should be stored more smart way
1.2 itojun 859: */
860: static int
1.98.2.2 ad 861: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
862: struct mbuf **mp, int *offp)
1.2 itojun 863: {
1.35 itojun 864: struct mbuf *m = *mp;
1.2 itojun 865: int off = *offp, hbhlen;
866: struct ip6_hbh *hbh;
867:
868: /* validation of the length of the header */
1.9 itojun 869: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
870: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
871: if (hbh == NULL) {
872: ip6stat.ip6s_tooshort++;
873: return -1;
874: }
875: hbhlen = (hbh->ip6h_len + 1) << 3;
876: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
877: hbhlen);
878: if (hbh == NULL) {
879: ip6stat.ip6s_tooshort++;
880: return -1;
881: }
1.57 thorpej 882: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 883: off += hbhlen;
884: hbhlen -= sizeof(struct ip6_hbh);
885:
886: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
887: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 888: return (-1);
1.2 itojun 889:
890: *offp = off;
891: *mp = m;
1.58 itojun 892: return (0);
1.2 itojun 893: }
894:
895: /*
896: * Search header for all Hop-by-hop options and process each option.
897: * This function is separate from ip6_hopopts_input() in order to
898: * handle a case where the sending node itself process its hop-by-hop
899: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 900: *
901: * The function assumes that hbh header is located right after the IPv6 header
902: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
903: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 904: */
905: int
1.98.2.2 ad 906: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
907: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 908: {
909: struct ip6_hdr *ip6;
910: int optlen = 0;
911: u_int8_t *opt = opthead;
912: u_int16_t rtalert_val;
1.22 itojun 913: u_int32_t jumboplen;
1.55 itojun 914: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 915:
916: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 917: switch (*opt) {
918: case IP6OPT_PAD1:
919: optlen = 1;
920: break;
921: case IP6OPT_PADN:
922: if (hbhlen < IP6OPT_MINLEN) {
923: ip6stat.ip6s_toosmall++;
924: goto bad;
925: }
926: optlen = *(opt + 1) + 2;
927: break;
928: case IP6OPT_RTALERT:
929: /* XXX may need check for alignment */
930: if (hbhlen < IP6OPT_RTALERT_LEN) {
931: ip6stat.ip6s_toosmall++;
932: goto bad;
933: }
934: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 935: /* XXX stat */
936: icmp6_error(m, ICMP6_PARAM_PROB,
937: ICMP6_PARAMPROB_HEADER,
938: erroff + opt + 1 - opthead);
939: return (-1);
1.35 itojun 940: }
941: optlen = IP6OPT_RTALERT_LEN;
1.97 christos 942: bcopy((void *)(opt + 2), (void *)&rtalert_val, 2);
1.35 itojun 943: *rtalertp = ntohs(rtalert_val);
944: break;
945: case IP6OPT_JUMBO:
1.22 itojun 946: /* XXX may need check for alignment */
947: if (hbhlen < IP6OPT_JUMBO_LEN) {
948: ip6stat.ip6s_toosmall++;
949: goto bad;
950: }
1.35 itojun 951: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 952: /* XXX stat */
953: icmp6_error(m, ICMP6_PARAM_PROB,
954: ICMP6_PARAMPROB_HEADER,
955: erroff + opt + 1 - opthead);
956: return (-1);
1.35 itojun 957: }
1.22 itojun 958: optlen = IP6OPT_JUMBO_LEN;
959:
960: /*
961: * IPv6 packets that have non 0 payload length
1.35 itojun 962: * must not contain a jumbo payload option.
1.22 itojun 963: */
964: ip6 = mtod(m, struct ip6_hdr *);
965: if (ip6->ip6_plen) {
966: ip6stat.ip6s_badoptions++;
967: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 968: ICMP6_PARAMPROB_HEADER,
969: erroff + opt - opthead);
970: return (-1);
1.22 itojun 971: }
1.2 itojun 972:
1.22 itojun 973: /*
974: * We may see jumbolen in unaligned location, so
975: * we'd need to perform bcopy().
976: */
977: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
978: jumboplen = (u_int32_t)htonl(jumboplen);
979:
980: #if 1
981: /*
982: * if there are multiple jumbo payload options,
983: * *plenp will be non-zero and the packet will be
984: * rejected.
985: * the behavior may need some debate in ipngwg -
986: * multiple options does not make sense, however,
987: * there's no explicit mention in specification.
988: */
989: if (*plenp != 0) {
990: ip6stat.ip6s_badoptions++;
991: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 992: ICMP6_PARAMPROB_HEADER,
993: erroff + opt + 2 - opthead);
994: return (-1);
1.22 itojun 995: }
1.8 itojun 996: #endif
1.2 itojun 997:
1.22 itojun 998: /*
999: * jumbo payload length must be larger than 65535.
1000: */
1001: if (jumboplen <= IPV6_MAXPACKET) {
1002: ip6stat.ip6s_badoptions++;
1003: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1004: ICMP6_PARAMPROB_HEADER,
1005: erroff + opt + 2 - opthead);
1006: return (-1);
1.22 itojun 1007: }
1008: *plenp = jumboplen;
1009:
1010: break;
1.35 itojun 1011: default: /* unknown option */
1012: if (hbhlen < IP6OPT_MINLEN) {
1013: ip6stat.ip6s_toosmall++;
1014: goto bad;
1015: }
1.55 itojun 1016: optlen = ip6_unknown_opt(opt, m,
1017: erroff + opt - opthead);
1018: if (optlen == -1)
1019: return (-1);
1.35 itojun 1020: optlen += 2;
1021: break;
1.2 itojun 1022: }
1023: }
1024:
1.55 itojun 1025: return (0);
1.2 itojun 1026:
1027: bad:
1028: m_freem(m);
1.55 itojun 1029: return (-1);
1.2 itojun 1030: }
1031:
1032: /*
1033: * Unknown option processing.
1034: * The third argument `off' is the offset from the IPv6 header to the option,
1035: * which is necessary if the IPv6 header the and option header and IPv6 header
1036: * is not continuous in order to return an ICMPv6 error.
1037: */
1038: int
1.98.2.2 ad 1039: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1040: {
1041: struct ip6_hdr *ip6;
1042:
1.35 itojun 1043: switch (IP6OPT_TYPE(*optp)) {
1044: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1045: return ((int)*(optp + 1));
1.35 itojun 1046: case IP6OPT_TYPE_DISCARD: /* silently discard */
1047: m_freem(m);
1.58 itojun 1048: return (-1);
1.35 itojun 1049: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1050: ip6stat.ip6s_badoptions++;
1051: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1052: return (-1);
1.35 itojun 1053: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1054: ip6stat.ip6s_badoptions++;
1055: ip6 = mtod(m, struct ip6_hdr *);
1056: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1057: (m->m_flags & (M_BCAST|M_MCAST)))
1058: m_freem(m);
1059: else
1060: icmp6_error(m, ICMP6_PARAM_PROB,
1061: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1062: return (-1);
1.2 itojun 1063: }
1064:
1065: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1066: return (-1);
1.2 itojun 1067: }
1068:
1069: /*
1.9 itojun 1070: * Create the "control" list for this pcb.
1071: *
1072: * The routine will be called from upper layer handlers like tcp6_input().
1073: * Thus the routine assumes that the caller (tcp6_input) have already
1074: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1075: * very first mbuf on the mbuf chain.
1076: * We may want to add some infinite loop prevention or sanity checks for safety.
1077: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1078: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1079: */
1080: void
1.98.2.2 ad 1081: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1082: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1083: {
1.85 rpaulo 1084: #ifdef RFC2292
1085: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1086: #else
1087: #define IS2292(x, y) (y)
1088: #endif
1089:
1.9 itojun 1090: #ifdef SO_TIMESTAMP
1.2 itojun 1091: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1092: struct timeval tv;
1093:
1094: microtime(&tv);
1.97 christos 1095: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1096: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1097: if (*mp)
1098: mp = &(*mp)->m_next;
1099: }
1.9 itojun 1100: #endif
1.87 rpaulo 1101:
1102: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1103: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1104: return;
1105:
1.2 itojun 1106: /* RFC 2292 sec. 5 */
1.35 itojun 1107: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1108: struct in6_pktinfo pi6;
1.85 rpaulo 1109:
1.2 itojun 1110: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1111: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1112: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1113: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1114: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1115: sizeof(struct in6_pktinfo),
1116: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1117: if (*mp)
1118: mp = &(*mp)->m_next;
1119: }
1.85 rpaulo 1120:
1.2 itojun 1121: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1122: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1123:
1.97 christos 1124: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1125: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1126: if (*mp)
1127: mp = &(*mp)->m_next;
1128: }
1129:
1130: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1131: u_int32_t flowinfo;
1132: int tclass;
1133:
1134: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1135: flowinfo >>= 20;
1136:
1137: tclass = flowinfo & 0xff;
1.97 christos 1138: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1139: IPV6_TCLASS, IPPROTO_IPV6);
1140:
1.2 itojun 1141: if (*mp)
1142: mp = &(*mp)->m_next;
1143: }
1144:
1145: /*
1.75 itojun 1146: * IPV6_HOPOPTS socket option. Recall that we required super-user
1147: * privilege for the option (see ip6_ctloutput), but it might be too
1148: * strict, since there might be some hop-by-hop options which can be
1149: * returned to normal user.
1.85 rpaulo 1150: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1151: */
1.75 itojun 1152: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1153: /*
1154: * Check if a hop-by-hop options header is contatined in the
1155: * received packet, and if so, store the options as ancillary
1156: * data. Note that a hop-by-hop options header must be
1157: * just after the IPv6 header, which fact is assured through
1158: * the IPv6 input processing.
1159: */
1.78 christos 1160: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1161: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1162: struct ip6_hbh *hbh;
1163: int hbhlen;
1.62 itojun 1164: struct mbuf *ext;
1.9 itojun 1165:
1.62 itojun 1166: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1167: xip6->ip6_nxt);
1.62 itojun 1168: if (ext == NULL) {
1.9 itojun 1169: ip6stat.ip6s_tooshort++;
1170: return;
1171: }
1.62 itojun 1172: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1173: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1174: if (hbhlen != ext->m_len) {
1175: m_freem(ext);
1.9 itojun 1176: ip6stat.ip6s_tooshort++;
1177: return;
1178: }
1.2 itojun 1179:
1180: /*
1181: * XXX: We copy whole the header even if a jumbo
1182: * payload option is included, which option is to
1183: * be removed before returning in the RFC 2292.
1.85 rpaulo 1184: * Note: this constraint is removed in RFC3542.
1.2 itojun 1185: */
1.97 christos 1186: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1187: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1188: IPPROTO_IPV6);
1.2 itojun 1189: if (*mp)
1190: mp = &(*mp)->m_next;
1.62 itojun 1191: m_freem(ext);
1.2 itojun 1192: }
1193: }
1194:
1195: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1196: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1197: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1198: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1199:
1200: /*
1201: * Search for destination options headers or routing
1202: * header(s) through the header chain, and stores each
1203: * header as ancillary data.
1204: * Note that the order of the headers remains in
1205: * the chain of ancillary data.
1206: */
1.86 rpaulo 1207: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1208: struct ip6_ext *ip6e = NULL;
1.9 itojun 1209: int elen;
1.62 itojun 1210: struct mbuf *ext = NULL;
1.9 itojun 1211:
1.62 itojun 1212: /*
1213: * if it is not an extension header, don't try to
1214: * pull it from the chain.
1215: */
1216: switch (nxt) {
1217: case IPPROTO_DSTOPTS:
1218: case IPPROTO_ROUTING:
1219: case IPPROTO_HOPOPTS:
1220: case IPPROTO_AH: /* is it possible? */
1221: break;
1222: default:
1223: goto loopend;
1224: }
1225:
1226: ext = ip6_pullexthdr(m, off, nxt);
1227: if (ext == NULL) {
1.9 itojun 1228: ip6stat.ip6s_tooshort++;
1229: return;
1230: }
1.62 itojun 1231: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1232: if (nxt == IPPROTO_AH)
1233: elen = (ip6e->ip6e_len + 2) << 2;
1234: else
1235: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1236: if (elen != ext->m_len) {
1237: m_freem(ext);
1.9 itojun 1238: ip6stat.ip6s_tooshort++;
1239: return;
1240: }
1.57 thorpej 1241: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1242:
1.35 itojun 1243: switch (nxt) {
1.62 itojun 1244: case IPPROTO_DSTOPTS:
1.35 itojun 1245: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1246: break;
1247:
1.97 christos 1248: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1249: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1250: IPPROTO_IPV6);
1.35 itojun 1251: if (*mp)
1252: mp = &(*mp)->m_next;
1253: break;
1254:
1255: case IPPROTO_ROUTING:
1256: if (!in6p->in6p_flags & IN6P_RTHDR)
1257: break;
1258:
1.97 christos 1259: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1260: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1261: IPPROTO_IPV6);
1.35 itojun 1262: if (*mp)
1263: mp = &(*mp)->m_next;
1264: break;
1265:
1.62 itojun 1266: case IPPROTO_HOPOPTS:
1267: case IPPROTO_AH: /* is it possible? */
1268: break;
1269:
1.35 itojun 1270: default:
1271: /*
1.62 itojun 1272: * other cases have been filtered in the above.
1273: * none will visit this case. here we supply
1274: * the code just in case (nxt overwritten or
1275: * other cases).
1.35 itojun 1276: */
1.62 itojun 1277: m_freem(ext);
1.35 itojun 1278: goto loopend;
1279:
1.2 itojun 1280: }
1281:
1282: /* proceed with the next header. */
1.9 itojun 1283: off += elen;
1.2 itojun 1284: nxt = ip6e->ip6e_nxt;
1.62 itojun 1285: ip6e = NULL;
1286: m_freem(ext);
1287: ext = NULL;
1.2 itojun 1288: }
1289: loopend:
1.62 itojun 1290: ;
1.2 itojun 1291: }
1.62 itojun 1292: }
1.85 rpaulo 1293: #undef IS2292
1294:
1295:
1296: void
1.95 dyoung 1297: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1298: uint32_t *mtu)
1.85 rpaulo 1299: {
1300: struct socket *so;
1301: struct mbuf *m_mtu;
1302: struct ip6_mtuinfo mtuctl;
1303:
1304: so = in6p->in6p_socket;
1305:
1306: if (mtu == NULL)
1307: return;
1308:
1309: #ifdef DIAGNOSTIC
1310: if (so == NULL) /* I believe this is impossible */
1311: panic("ip6_notify_pmtu: socket is NULL");
1312: #endif
1313:
1314: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1315: mtuctl.ip6m_mtu = *mtu;
1316: mtuctl.ip6m_addr = *dst;
1317: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1318: return;
1319:
1.97 christos 1320: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1321: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1322: return;
1323:
1.95 dyoung 1324: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1325: == 0) {
1326: m_freem(m_mtu);
1327: /* XXX: should count statistics */
1328: } else
1329: sorwakeup(so);
1330:
1331: return;
1332: }
1.62 itojun 1333:
1334: /*
1335: * pull single extension header from mbuf chain. returns single mbuf that
1336: * contains the result, or NULL on error.
1337: */
1338: static struct mbuf *
1.98.2.2 ad 1339: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1340: {
1341: struct ip6_ext ip6e;
1342: size_t elen;
1343: struct mbuf *n;
1344:
1345: #ifdef DIAGNOSTIC
1346: switch (nxt) {
1347: case IPPROTO_DSTOPTS:
1348: case IPPROTO_ROUTING:
1349: case IPPROTO_HOPOPTS:
1350: case IPPROTO_AH: /* is it possible? */
1351: break;
1352: default:
1353: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1354: }
1.62 itojun 1355: #endif
1.2 itojun 1356:
1.97 christos 1357: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1358: if (nxt == IPPROTO_AH)
1359: elen = (ip6e.ip6e_len + 2) << 2;
1360: else
1361: elen = (ip6e.ip6e_len + 1) << 3;
1362:
1363: MGET(n, M_DONTWAIT, MT_DATA);
1364: if (n && elen >= MLEN) {
1365: MCLGET(n, M_DONTWAIT);
1366: if ((n->m_flags & M_EXT) == 0) {
1367: m_free(n);
1368: n = NULL;
1369: }
1370: }
1371: if (!n)
1372: return NULL;
1373:
1374: n->m_len = 0;
1375: if (elen >= M_TRAILINGSPACE(n)) {
1376: m_free(n);
1377: return NULL;
1378: }
1379:
1.97 christos 1380: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1381: n->m_len = elen;
1382: return n;
1.2 itojun 1383: }
1384:
1385: /*
1386: * Get pointer to the previous header followed by the header
1387: * currently processed.
1388: * XXX: This function supposes that
1389: * M includes all headers,
1390: * the next header field and the header length field of each header
1391: * are valid, and
1392: * the sum of each header length equals to OFF.
1393: * Because of these assumptions, this function must be called very
1394: * carefully. Moreover, it will not be used in the near future when
1395: * we develop `neater' mechanism to process extension headers.
1396: */
1.58 itojun 1397: u_int8_t *
1.98.2.2 ad 1398: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1399: {
1400: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1401:
1402: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1403: return (&ip6->ip6_nxt);
1.2 itojun 1404: else {
1405: int len, nxt;
1406: struct ip6_ext *ip6e = NULL;
1407:
1408: nxt = ip6->ip6_nxt;
1409: len = sizeof(struct ip6_hdr);
1410: while (len < off) {
1.97 christos 1411: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1412:
1.35 itojun 1413: switch (nxt) {
1.2 itojun 1414: case IPPROTO_FRAGMENT:
1415: len += sizeof(struct ip6_frag);
1416: break;
1417: case IPPROTO_AH:
1418: len += (ip6e->ip6e_len + 2) << 2;
1419: break;
1420: default:
1421: len += (ip6e->ip6e_len + 1) << 3;
1422: break;
1423: }
1424: nxt = ip6e->ip6e_nxt;
1425: }
1426: if (ip6e)
1.58 itojun 1427: return (&ip6e->ip6e_nxt);
1.2 itojun 1428: else
1429: return NULL;
1.18 itojun 1430: }
1431: }
1432:
1433: /*
1434: * get next header offset. m will be retained.
1435: */
1436: int
1.98.2.2 ad 1437: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1438: {
1439: struct ip6_hdr ip6;
1440: struct ip6_ext ip6e;
1441: struct ip6_frag fh;
1442:
1443: /* just in case */
1444: if (m == NULL)
1445: panic("ip6_nexthdr: m == NULL");
1446: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1447: return -1;
1448:
1449: switch (proto) {
1450: case IPPROTO_IPV6:
1.83 rpaulo 1451: /* do not chase beyond intermediate IPv6 headers */
1452: if (off != 0)
1453: return -1;
1.18 itojun 1454: if (m->m_pkthdr.len < off + sizeof(ip6))
1455: return -1;
1.97 christos 1456: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1457: if (nxtp)
1458: *nxtp = ip6.ip6_nxt;
1459: off += sizeof(ip6);
1460: return off;
1461:
1462: case IPPROTO_FRAGMENT:
1463: /*
1464: * terminate parsing if it is not the first fragment,
1465: * it does not make sense to parse through it.
1466: */
1467: if (m->m_pkthdr.len < off + sizeof(fh))
1468: return -1;
1.97 christos 1469: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1470: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1471: return -1;
1472: if (nxtp)
1473: *nxtp = fh.ip6f_nxt;
1474: off += sizeof(struct ip6_frag);
1475: return off;
1476:
1477: case IPPROTO_AH:
1478: if (m->m_pkthdr.len < off + sizeof(ip6e))
1479: return -1;
1.97 christos 1480: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1481: if (nxtp)
1482: *nxtp = ip6e.ip6e_nxt;
1483: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1484: if (m->m_pkthdr.len < off)
1485: return -1;
1.18 itojun 1486: return off;
1487:
1488: case IPPROTO_HOPOPTS:
1489: case IPPROTO_ROUTING:
1490: case IPPROTO_DSTOPTS:
1491: if (m->m_pkthdr.len < off + sizeof(ip6e))
1492: return -1;
1.97 christos 1493: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1494: if (nxtp)
1495: *nxtp = ip6e.ip6e_nxt;
1496: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1497: if (m->m_pkthdr.len < off)
1498: return -1;
1.18 itojun 1499: return off;
1500:
1501: case IPPROTO_NONE:
1502: case IPPROTO_ESP:
1503: case IPPROTO_IPCOMP:
1504: /* give up */
1505: return -1;
1506:
1507: default:
1508: return -1;
1509: }
1510: }
1511:
1512: /*
1513: * get offset for the last header in the chain. m will be kept untainted.
1514: */
1515: int
1.98.2.2 ad 1516: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1517: {
1518: int newoff;
1519: int nxt;
1520:
1521: if (!nxtp) {
1522: nxt = -1;
1523: nxtp = &nxt;
1524: }
1.86 rpaulo 1525: for (;;) {
1.18 itojun 1526: newoff = ip6_nexthdr(m, off, proto, nxtp);
1527: if (newoff < 0)
1528: return off;
1529: else if (newoff < off)
1530: return -1; /* invalid */
1531: else if (newoff == off)
1532: return newoff;
1533:
1534: off = newoff;
1535: proto = *nxtp;
1.2 itojun 1536: }
1537: }
1538:
1.81 rpaulo 1539: struct m_tag *
1.98.2.2 ad 1540: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1541: {
1542: struct m_tag *mtag;
1543:
1544: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1545: if (!mtag) {
1546: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1547: M_NOWAIT);
1548: if (mtag) {
1549: m_tag_prepend(m, mtag);
1550: bzero(mtag + 1, sizeof(struct ip6aux));
1551: }
1552: }
1553: return mtag;
1554: }
1555:
1556: struct m_tag *
1.98.2.2 ad 1557: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1558: {
1559: struct m_tag *mtag;
1560:
1561: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1562: return mtag;
1563: }
1564:
1565: void
1.98.2.2 ad 1566: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1567: {
1568: struct m_tag *mtag;
1569:
1570: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1571: if (mtag)
1572: m_tag_delete(m, mtag);
1573: }
1574:
1.98 liamjfoy 1575: #ifdef GATEWAY
1576: /*
1577: * sysctl helper routine for net.inet.ip6.maxflows. Since
1578: * we could reduce this value, call ip6flow_reap();
1579: */
1580: static int
1.98.2.1 ad 1581: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1582: {
1583: int s;
1584:
1585: s = sysctl_lookup(SYSCTLFN_CALL(rnode));
1.98.2.1 ad 1586: if (s || newp == NULL)
1.98 liamjfoy 1587: return (s);
1588:
1589: s = splsoftnet();
1590: ip6flow_reap(0);
1591: splx(s);
1592:
1593: return (0);
1594: }
1.98.2.1 ad 1595:
1596: static int
1597: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1598: {
1599: int error, tmp;
1600: struct sysctlnode node;
1601:
1602: node = *rnode;
1603: tmp = ip6_hashsize;
1604: node.sysctl_data = &tmp;
1605: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1606: if (error || newp == NULL)
1607: return (error);
1608:
1609: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1610: /*
1611: * Can only fail due to malloc()
1612: */
1613: if (ip6flow_invalidate_all(tmp))
1614: return ENOMEM;
1615: } else {
1616: /*
1617: * EINVAL if not a power of 2
1618: */
1619: return EINVAL;
1620: }
1621:
1622: return (0);
1623: }
1.98 liamjfoy 1624: #endif /* GATEWAY */
1625:
1.2 itojun 1626: /*
1627: * System control for IP6
1628: */
1629:
1630: u_char inet6ctlerrmap[PRC_NCMDS] = {
1631: 0, 0, 0, 0,
1632: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1633: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1634: EMSGSIZE, EHOSTUNREACH, 0, 0,
1635: 0, 0, 0, 0,
1636: ENOPROTOOPT
1637: };
1638:
1.70 atatat 1639: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1640: {
1.85 rpaulo 1641: #ifdef RFC2292
1642: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1643: #else
1644: #define IS2292(x, y) (y)
1645: #endif
1.26 itojun 1646:
1.73 atatat 1647: sysctl_createv(clog, 0, NULL, NULL,
1648: CTLFLAG_PERMANENT,
1.70 atatat 1649: CTLTYPE_NODE, "net", NULL,
1650: NULL, 0, NULL, 0,
1651: CTL_NET, CTL_EOL);
1.73 atatat 1652: sysctl_createv(clog, 0, NULL, NULL,
1653: CTLFLAG_PERMANENT,
1.74 atatat 1654: CTLTYPE_NODE, "inet6",
1655: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1656: NULL, 0, NULL, 0,
1657: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1658: sysctl_createv(clog, 0, NULL, NULL,
1659: CTLFLAG_PERMANENT,
1.74 atatat 1660: CTLTYPE_NODE, "ip6",
1661: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1662: NULL, 0, NULL, 0,
1663: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1664:
1.73 atatat 1665: sysctl_createv(clog, 0, NULL, NULL,
1666: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1667: CTLTYPE_INT, "forwarding",
1668: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1669: NULL, 0, &ip6_forwarding, 0,
1670: CTL_NET, PF_INET6, IPPROTO_IPV6,
1671: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1672: sysctl_createv(clog, 0, NULL, NULL,
1673: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1674: CTLTYPE_INT, "redirect",
1675: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1676: NULL, 0, &ip6_sendredirects, 0,
1677: CTL_NET, PF_INET6, IPPROTO_IPV6,
1678: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1679: sysctl_createv(clog, 0, NULL, NULL,
1680: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1681: CTLTYPE_INT, "hlim",
1682: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1683: NULL, 0, &ip6_defhlim, 0,
1684: CTL_NET, PF_INET6, IPPROTO_IPV6,
1685: IPV6CTL_DEFHLIM, CTL_EOL);
1686: #ifdef notyet
1.73 atatat 1687: sysctl_createv(clog, 0, NULL, NULL,
1688: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1689: CTLTYPE_INT, "mtu", NULL,
1690: NULL, 0, &, 0,
1691: CTL_NET, PF_INET6, IPPROTO_IPV6,
1692: IPV6CTL_DEFMTU, CTL_EOL);
1693: #endif
1694: #ifdef __no_idea__
1.73 atatat 1695: sysctl_createv(clog, 0, NULL, NULL,
1696: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1697: CTLTYPE_INT, "forwsrcrt", NULL,
1698: NULL, 0, &?, 0,
1699: CTL_NET, PF_INET6, IPPROTO_IPV6,
1700: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1701: sysctl_createv(clog, 0, NULL, NULL,
1702: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1703: CTLTYPE_STRUCT, "mrtstats", NULL,
1704: NULL, 0, &?, sizeof(?),
1705: CTL_NET, PF_INET6, IPPROTO_IPV6,
1706: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1707: sysctl_createv(clog, 0, NULL, NULL,
1708: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1709: CTLTYPE_?, "mrtproto", NULL,
1710: NULL, 0, &?, sizeof(?),
1711: CTL_NET, PF_INET6, IPPROTO_IPV6,
1712: IPV6CTL_MRTPROTO, CTL_EOL);
1713: #endif
1.73 atatat 1714: sysctl_createv(clog, 0, NULL, NULL,
1715: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1716: CTLTYPE_INT, "maxfragpackets",
1717: SYSCTL_DESCR("Maximum number of fragments to buffer "
1718: "for reassembly"),
1.70 atatat 1719: NULL, 0, &ip6_maxfragpackets, 0,
1720: CTL_NET, PF_INET6, IPPROTO_IPV6,
1721: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1722: #ifdef __no_idea__
1.73 atatat 1723: sysctl_createv(clog, 0, NULL, NULL,
1724: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1725: CTLTYPE_INT, "sourcecheck", NULL,
1726: NULL, 0, &?, 0,
1727: CTL_NET, PF_INET6, IPPROTO_IPV6,
1728: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1729: sysctl_createv(clog, 0, NULL, NULL,
1730: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1731: CTLTYPE_INT, "sourcecheck_logint", NULL,
1732: NULL, 0, &?, 0,
1733: CTL_NET, PF_INET6, IPPROTO_IPV6,
1734: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1735: #endif
1.73 atatat 1736: sysctl_createv(clog, 0, NULL, NULL,
1737: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1738: CTLTYPE_INT, "accept_rtadv",
1739: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1740: NULL, 0, &ip6_accept_rtadv, 0,
1741: CTL_NET, PF_INET6, IPPROTO_IPV6,
1742: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1743: sysctl_createv(clog, 0, NULL, NULL,
1744: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1745: CTLTYPE_INT, "keepfaith",
1746: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1747: NULL, 0, &ip6_keepfaith, 0,
1748: CTL_NET, PF_INET6, IPPROTO_IPV6,
1749: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1750: sysctl_createv(clog, 0, NULL, NULL,
1751: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1752: CTLTYPE_INT, "log_interval",
1753: SYSCTL_DESCR("Minumum interval between logging "
1754: "unroutable packets"),
1.70 atatat 1755: NULL, 0, &ip6_log_interval, 0,
1756: CTL_NET, PF_INET6, IPPROTO_IPV6,
1757: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1758: sysctl_createv(clog, 0, NULL, NULL,
1759: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1760: CTLTYPE_INT, "hdrnestlimit",
1761: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1762: NULL, 0, &ip6_hdrnestlimit, 0,
1763: CTL_NET, PF_INET6, IPPROTO_IPV6,
1764: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1765: sysctl_createv(clog, 0, NULL, NULL,
1766: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1767: CTLTYPE_INT, "dad_count",
1768: SYSCTL_DESCR("Number of Duplicate Address Detection "
1769: "probes to send"),
1.70 atatat 1770: NULL, 0, &ip6_dad_count, 0,
1771: CTL_NET, PF_INET6, IPPROTO_IPV6,
1772: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1773: sysctl_createv(clog, 0, NULL, NULL,
1774: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1775: CTLTYPE_INT, "auto_flowlabel",
1776: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1777: NULL, 0, &ip6_auto_flowlabel, 0,
1778: CTL_NET, PF_INET6, IPPROTO_IPV6,
1779: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1780: sysctl_createv(clog, 0, NULL, NULL,
1781: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1782: CTLTYPE_INT, "defmcasthlim",
1783: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1784: NULL, 0, &ip6_defmcasthlim, 0,
1785: CTL_NET, PF_INET6, IPPROTO_IPV6,
1786: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1787: #if NGIF > 0
1.73 atatat 1788: sysctl_createv(clog, 0, NULL, NULL,
1789: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1790: CTLTYPE_INT, "gifhlim",
1791: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1792: NULL, 0, &ip6_gif_hlim, 0,
1793: CTL_NET, PF_INET6, IPPROTO_IPV6,
1794: IPV6CTL_GIF_HLIM, CTL_EOL);
1795: #endif /* NGIF */
1.73 atatat 1796: sysctl_createv(clog, 0, NULL, NULL,
1797: CTLFLAG_PERMANENT,
1.74 atatat 1798: CTLTYPE_STRING, "kame_version",
1799: SYSCTL_DESCR("KAME Version"),
1.78 christos 1800: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1801: CTL_NET, PF_INET6, IPPROTO_IPV6,
1802: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1803: sysctl_createv(clog, 0, NULL, NULL,
1804: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1805: CTLTYPE_INT, "use_deprecated",
1806: SYSCTL_DESCR("Allow use of deprecated addresses as "
1807: "source addresses"),
1.70 atatat 1808: NULL, 0, &ip6_use_deprecated, 0,
1809: CTL_NET, PF_INET6, IPPROTO_IPV6,
1810: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1811: sysctl_createv(clog, 0, NULL, NULL,
1812: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1813: CTLTYPE_INT, "rr_prune", NULL,
1814: NULL, 0, &ip6_rr_prune, 0,
1815: CTL_NET, PF_INET6, IPPROTO_IPV6,
1816: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1817: sysctl_createv(clog, 0, NULL, NULL,
1818: CTLFLAG_PERMANENT
1.70 atatat 1819: #ifndef INET6_BINDV6ONLY
1.73 atatat 1820: |CTLFLAG_READWRITE,
1.70 atatat 1821: #endif
1.74 atatat 1822: CTLTYPE_INT, "v6only",
1823: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1824: "to PF_INET sockets"),
1.70 atatat 1825: NULL, 0, &ip6_v6only, 0,
1826: CTL_NET, PF_INET6, IPPROTO_IPV6,
1827: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1828: sysctl_createv(clog, 0, NULL, NULL,
1829: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1830: CTLTYPE_INT, "anonportmin",
1831: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1832: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1833: CTL_NET, PF_INET6, IPPROTO_IPV6,
1834: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1835: sysctl_createv(clog, 0, NULL, NULL,
1836: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1837: CTLTYPE_INT, "anonportmax",
1838: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1839: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1840: CTL_NET, PF_INET6, IPPROTO_IPV6,
1841: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1842: #ifndef IPNOPRIVPORTS
1.73 atatat 1843: sysctl_createv(clog, 0, NULL, NULL,
1844: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1845: CTLTYPE_INT, "lowportmin",
1846: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1847: "to assign"),
1.70 atatat 1848: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1849: CTL_NET, PF_INET6, IPPROTO_IPV6,
1850: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1851: sysctl_createv(clog, 0, NULL, NULL,
1852: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1853: CTLTYPE_INT, "lowportmax",
1854: SYSCTL_DESCR("Highest privileged ephemeral port number "
1855: "to assign"),
1.70 atatat 1856: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1857: CTL_NET, PF_INET6, IPPROTO_IPV6,
1858: IPV6CTL_LOWPORTMAX, CTL_EOL);
1859: #endif /* IPNOPRIVPORTS */
1.73 atatat 1860: sysctl_createv(clog, 0, NULL, NULL,
1861: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1862: CTLTYPE_INT, "use_tempaddr",
1863: SYSCTL_DESCR("Use temporary address"),
1864: NULL, 0, &ip6_use_tempaddr, 0,
1865: CTL_NET, PF_INET6, IPPROTO_IPV6,
1866: CTL_CREATE, CTL_EOL);
1867: sysctl_createv(clog, 0, NULL, NULL,
1868: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1869: CTLTYPE_INT, "temppltime",
1870: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1871: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1872: CTL_NET, PF_INET6, IPPROTO_IPV6,
1873: CTL_CREATE, CTL_EOL);
1874: sysctl_createv(clog, 0, NULL, NULL,
1875: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1876: CTLTYPE_INT, "tempvltime",
1877: SYSCTL_DESCR("valid lifetime of a temporary address"),
1878: NULL, 0, &ip6_temp_valid_lifetime, 0,
1879: CTL_NET, PF_INET6, IPPROTO_IPV6,
1880: CTL_CREATE, CTL_EOL);
1881: sysctl_createv(clog, 0, NULL, NULL,
1882: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1883: CTLTYPE_INT, "maxfrags",
1884: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1885: NULL, 0, &ip6_maxfrags, 0,
1886: CTL_NET, PF_INET6, IPPROTO_IPV6,
1887: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1888: sysctl_createv(clog, 0, NULL, NULL,
1889: CTLFLAG_PERMANENT,
1890: CTLTYPE_STRUCT, "stats",
1891: SYSCTL_DESCR("IPv6 statistics"),
1892: NULL, 0, &ip6stat, sizeof(ip6stat),
1893: CTL_NET, PF_INET6, IPPROTO_IPV6,
1894: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1895: sysctl_createv(clog, 0, NULL, NULL,
1896: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1897: CTLTYPE_INT, "use_defaultzone",
1898: SYSCTL_DESCR("Whether to use the default scope zones"),
1899: NULL, 0, &ip6_use_defzone, 0,
1900: CTL_NET, PF_INET6, IPPROTO_IPV6,
1901: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1902: sysctl_createv(clog, 0, NULL, NULL,
1903: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1904: CTLTYPE_INT, "mcast_pmtu",
1905: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1906: NULL, 0, &ip6_mcast_pmtu, 0,
1907: CTL_NET, PF_INET6, IPPROTO_IPV6,
1908: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1909: #ifdef GATEWAY
1910: sysctl_createv(clog, 0, NULL, NULL,
1911: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1912: CTLTYPE_INT, "maxflows",
1913: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.98.2.1 ad 1914: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1915: CTL_NET, PF_INET6, IPPROTO_IPV6,
1916: CTL_CREATE, CTL_EOL);
1917: sysctl_createv(clog, 0, NULL, NULL,
1918: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1919: CTLTYPE_INT, "hashsize",
1920: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1921: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1.98 liamjfoy 1922: CTL_NET, PF_INET6, IPPROTO_IPV6,
1923: CTL_CREATE, CTL_EOL);
1924: #endif
1.2 itojun 1925: }
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