Annotation of src/sys/netinet6/ip6_input.c, Revision 1.90.2.1.2.1
1.90.2.1.2.1! wrstuden 1: /* $NetBSD: ip6_input.c,v 1.90.2.2 2007/05/24 19:13:15 pavel 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>
1.90.2.1.2.1! wrstuden 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.90.2.2 2007/05/24 19:13:15 pavel 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:
1.90.2.1.2.1! wrstuden 115: #ifdef FAST_IPSEC
! 116: #include <netipsec/ipsec.h>
! 117: #include <netipsec/ipsec6.h>
! 118: #include <netipsec/key.h>
! 119: #endif /* FAST_IPSEC */
! 120:
1.2 itojun 121: #include <netinet6/ip6protosw.h>
122:
123: #include "faith.h"
124: #include "gif.h"
1.50 itojun 125:
126: #if NGIF > 0
127: #include <netinet6/in6_gif.h>
128: #endif
1.2 itojun 129:
1.9 itojun 130: #include <net/net_osdep.h>
131:
1.2 itojun 132: extern struct domain inet6domain;
133:
134: u_char ip6_protox[IPPROTO_MAX];
135: static int ip6qmaxlen = IFQ_MAXLEN;
136: struct in6_ifaddr *in6_ifaddr;
137: struct ifqueue ip6intrq;
138:
1.83 rpaulo 139: extern struct callout in6_tmpaddrtimer_ch;
140:
1.2 itojun 141: int ip6_forward_srcrt; /* XXX */
142: int ip6_sourcecheck; /* XXX */
143: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 144:
1.29 thorpej 145: #ifdef PFIL_HOOKS
146: struct pfil_head inet6_pfil_hook;
147: #endif
148:
1.2 itojun 149: struct ip6stat ip6stat;
150:
151: static void ip6_init2 __P((void *));
1.81 rpaulo 152: static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *));
1.2 itojun 153:
1.5 itojun 154: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
1.62 itojun 155: static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));
1.2 itojun 156:
157: /*
158: * IP6 initialization: fill in IP6 protocol switch table.
159: * All protocols not implemented in kernel go to raw IP6 protocol handler.
160: */
161: void
162: ip6_init()
163: {
1.78 christos 164: const struct ip6protosw *pr;
1.35 itojun 165: int i;
1.2 itojun 166:
1.78 christos 167: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 168: if (pr == 0)
169: panic("ip6_init");
170: for (i = 0; i < IPPROTO_MAX; i++)
171: ip6_protox[i] = pr - inet6sw;
1.78 christos 172: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
173: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 174: if (pr->pr_domain->dom_family == PF_INET6 &&
175: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
176: ip6_protox[pr->pr_protocol] = pr - inet6sw;
177: ip6intrq.ifq_maxlen = ip6qmaxlen;
1.81 rpaulo 178: scope6_init();
179: addrsel_policy_init();
1.2 itojun 180: nd6_init();
181: frag6_init();
1.83 rpaulo 182: ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 183:
184: ip6_init2((void *)0);
1.29 thorpej 185:
186: #ifdef PFIL_HOOKS
187: /* Register our Packet Filter hook. */
1.33 thorpej 188: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
189: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 190: i = pfil_head_register(&inet6_pfil_hook);
191: if (i != 0)
192: printf("ip6_init: WARNING: unable to register pfil hook, "
193: "error %d\n", i);
194: #endif /* PFIL_HOOKS */
1.2 itojun 195: }
196:
197: static void
1.90 christos 198: ip6_init2(void *dummy)
1.2 itojun 199: {
200:
201: /* nd6_timer_init */
1.19 thorpej 202: callout_init(&nd6_timer_ch);
203: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83 rpaulo 204:
205: /* timer for regeneranation of temporary addresses randomize ID */
206: callout_init(&in6_tmpaddrtimer_ch);
207: callout_reset(&in6_tmpaddrtimer_ch,
208: (ip6_temp_preferred_lifetime - ip6_desync_factor -
209: ip6_temp_regen_advance) * hz,
210: in6_tmpaddrtimer, NULL);
1.2 itojun 211: }
212:
213: /*
214: * IP6 input interrupt handling. Just pass the packet to ip6_input.
215: */
216: void
217: ip6intr()
218: {
219: int s;
220: struct mbuf *m;
221:
222: for (;;) {
1.41 thorpej 223: s = splnet();
1.2 itojun 224: IF_DEQUEUE(&ip6intrq, m);
225: splx(s);
226: if (m == 0)
227: return;
1.83 rpaulo 228: /* drop the packet if IPv6 operation is disabled on the IF */
229: if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {
230: m_freem(m);
231: return;
232: }
1.2 itojun 233: ip6_input(m);
234: }
235: }
236:
237: extern struct route_in6 ip6_forward_rt;
238:
239: void
240: ip6_input(m)
241: struct mbuf *m;
242: {
1.9 itojun 243: struct ip6_hdr *ip6;
1.2 itojun 244: int off = sizeof(struct ip6_hdr), nest;
245: u_int32_t plen;
1.5 itojun 246: u_int32_t rtalert = ~0;
1.2 itojun 247: int nxt, ours = 0;
1.9 itojun 248: struct ifnet *deliverifp = NULL;
1.64 itojun 249: int srcrt = 0;
1.90.2.1.2.1! wrstuden 250: #ifdef FAST_IPSEC
! 251: struct m_tag *mtag;
! 252: struct tdb_ident *tdbi;
! 253: struct secpolicy *sp;
! 254: int s, error;
! 255: #endif
1.2 itojun 256:
257: #ifdef IPSEC
258: /*
259: * should the inner packet be considered authentic?
260: * see comment in ah4_input().
261: */
1.49 itojun 262: m->m_flags &= ~M_AUTHIPHDR;
263: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 264: #endif
1.9 itojun 265:
1.2 itojun 266: /*
1.81 rpaulo 267: * make sure we don't have onion peering information into m_tag.
268: */
269: ip6_delaux(m);
270:
271: /*
1.44 itojun 272: * mbuf statistics
1.2 itojun 273: */
274: if (m->m_flags & M_EXT) {
275: if (m->m_next)
276: ip6stat.ip6s_mext2m++;
277: else
278: ip6stat.ip6s_mext1++;
279: } else {
1.40 itojun 280: #define M2MMAX (sizeof(ip6stat.ip6s_m2m)/sizeof(ip6stat.ip6s_m2m[0]))
1.2 itojun 281: if (m->m_next) {
1.9 itojun 282: if (m->m_flags & M_LOOP) {
1.77 peter 283: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 284: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 285: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
286: else
287: ip6stat.ip6s_m2m[0]++;
288: } else
289: ip6stat.ip6s_m1++;
1.40 itojun 290: #undef M2MMAX
1.2 itojun 291: }
292:
1.9 itojun 293: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
294: ip6stat.ip6s_total++;
295:
1.57 thorpej 296: /*
297: * If the IPv6 header is not aligned, slurp it up into a new
298: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 299: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 300: * IPv6 header is in the first mbuf of the chain.
301: */
302: if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
303: struct ifnet *inifp = m->m_pkthdr.rcvif;
304: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
305: (max_linkhdr + 3) & ~3)) == NULL) {
306: /* XXXJRT new stat, please */
307: ip6stat.ip6s_toosmall++;
308: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
309: return;
310: }
311: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
312: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 313: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 314: ip6stat.ip6s_toosmall++;
315: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
316: return;
317: }
1.2 itojun 318: }
319:
320: ip6 = mtod(m, struct ip6_hdr *);
321:
322: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
323: ip6stat.ip6s_badvers++;
1.9 itojun 324: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 325: goto bad;
326: }
1.15 darrenr 327:
328: #ifdef PFIL_HOOKS
329: /*
330: * Run through list of hooks for input packets. If there are any
331: * filters which require that additional packets in the flow are
332: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
333: * Note that filters must _never_ set this flag, as another filter
334: * in the list may have previously cleared it.
335: */
1.39 itojun 336: /*
337: * let ipfilter look at packet on the wire,
338: * not the decapsulated packet.
339: */
340: #ifdef IPSEC
1.42 itojun 341: if (!ipsec_getnhist(m))
1.90.2.1.2.1! wrstuden 342: #elif defined(FAST_IPSEC)
! 343: if (!ipsec_indone(m))
1.39 itojun 344: #else
345: if (1)
346: #endif
347: {
1.64 itojun 348: struct in6_addr odst;
349:
350: odst = ip6->ip6_dst;
1.39 itojun 351: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
352: PFIL_IN) != 0)
353: return;
354: if (m == NULL)
355: return;
356: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 357: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 358: }
1.15 darrenr 359: #endif /* PFIL_HOOKS */
360:
1.2 itojun 361: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
362:
1.30 thorpej 363: #ifdef ALTQ
364: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
365: /* packet is dropped by traffic conditioner */
366: return;
1.9 itojun 367: }
368: #endif
369:
1.2 itojun 370: /*
1.44 itojun 371: * Check against address spoofing/corruption.
1.2 itojun 372: */
373: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
374: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 375: /*
376: * XXX: "badscope" is not very suitable for a multicast source.
377: */
1.2 itojun 378: ip6stat.ip6s_badscope++;
1.9 itojun 379: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 380: goto bad;
381: }
1.13 itojun 382: /*
1.44 itojun 383: * The following check is not documented in specs. A malicious
384: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
385: * and bypass security checks (act as if it was from 127.0.0.1 by using
386: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 387: *
1.44 itojun 388: * This check chokes if we are in an SIIT cloud. As none of BSDs
389: * support IPv4-less kernel compilation, we cannot support SIIT
390: * environment at all. So, it makes more sense for us to reject any
391: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 392: * partial support for SIIT environment.
1.13 itojun 393: */
394: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
395: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
396: ip6stat.ip6s_badscope++;
397: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
398: goto bad;
399: }
1.17 itojun 400: #if 0
1.13 itojun 401: /*
1.17 itojun 402: * Reject packets with IPv4 compatible addresses (auto tunnel).
403: *
404: * The code forbids auto tunnel relay case in RFC1933 (the check is
405: * stronger than RFC1933). We may want to re-enable it if mech-xx
406: * is revised to forbid relaying case.
1.13 itojun 407: */
408: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
409: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
410: ip6stat.ip6s_badscope++;
411: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
412: goto bad;
413: }
414: #endif
1.35 itojun 415:
1.2 itojun 416: /*
1.82 yamt 417: * Disambiguate address scope zones (if there is ambiguity).
418: * We first make sure that the original source or destination address
419: * is not in our internal form for scoped addresses. Such addresses
420: * are not necessarily invalid spec-wise, but we cannot accept them due
421: * to the usage conflict.
422: * in6_setscope() then also checks and rejects the cases where src or
423: * dst are the loopback address and the receiving interface
424: * is not loopback.
425: */
1.88 bouyer 426: if (__predict_false(
427: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
428: goto bad;
429: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 430: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
431: ip6stat.ip6s_badscope++; /* XXX */
432: goto bad;
433: }
434: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
435: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
436: ip6stat.ip6s_badscope++;
437: goto bad;
438: }
439:
440: /*
1.2 itojun 441: * Multicast check
442: */
443: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
444: struct in6_multi *in6m = 0;
1.9 itojun 445:
446: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 447: /*
448: * See if we belong to the destination multicast group on the
449: * arrival interface.
450: */
451: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
452: if (in6m)
453: ours = 1;
454: else if (!ip6_mrouter) {
455: ip6stat.ip6s_notmember++;
456: ip6stat.ip6s_cantforward++;
1.9 itojun 457: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 458: goto bad;
459: }
1.9 itojun 460: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 461: goto hbhcheck;
462: }
463:
464: /*
465: * Unicast check
466: */
1.22 itojun 467: if (ip6_forward_rt.ro_rt != NULL &&
1.55 itojun 468: (ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 &&
1.22 itojun 469: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.72 itojun 470: &((struct sockaddr_in6 *)(&ip6_forward_rt.ro_dst))->sin6_addr))
1.25 itojun 471: ip6stat.ip6s_forward_cachehit++;
1.22 itojun 472: else {
1.35 itojun 473: struct sockaddr_in6 *dst6;
474:
1.2 itojun 475: if (ip6_forward_rt.ro_rt) {
1.22 itojun 476: /* route is down or destination is different */
1.25 itojun 477: ip6stat.ip6s_forward_cachemiss++;
1.2 itojun 478: RTFREE(ip6_forward_rt.ro_rt);
479: ip6_forward_rt.ro_rt = 0;
480: }
1.22 itojun 481:
1.2 itojun 482: bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6));
1.35 itojun 483: dst6 = (struct sockaddr_in6 *)&ip6_forward_rt.ro_dst;
484: dst6->sin6_len = sizeof(struct sockaddr_in6);
485: dst6->sin6_family = AF_INET6;
486: dst6->sin6_addr = ip6->ip6_dst;
1.2 itojun 487:
1.9 itojun 488: rtalloc((struct route *)&ip6_forward_rt);
1.2 itojun 489: }
490:
491: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
492:
493: /*
494: * Accept the packet if the forwarding interface to the destination
495: * according to the routing table is the loopback interface,
496: * unless the associated route has a gateway.
497: * Note that this approach causes to accept a packet if there is a
498: * route to the loopback interface for the destination of the packet.
499: * But we think it's even useful in some situations, e.g. when using
500: * a special daemon which wants to intercept the packet.
501: */
502: if (ip6_forward_rt.ro_rt &&
503: (ip6_forward_rt.ro_rt->rt_flags &
504: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55 itojun 505: !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2 itojun 506: #if 0
507: /*
508: * The check below is redundant since the comparison of
509: * the destination and the key of the rtentry has
510: * already done through looking up the routing table.
511: */
512: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55 itojun 513: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2 itojun 514: #endif
1.9 itojun 515: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 516: struct in6_ifaddr *ia6 =
517: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
518: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
519: m->m_flags |= M_ANYCAST6;
1.24 itojun 520: /*
521: * packets to a tentative, duplicated, or somehow invalid
522: * address must not be accepted.
523: */
1.2 itojun 524: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 525: /* this address is ready */
1.2 itojun 526: ours = 1;
1.9 itojun 527: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 528: goto hbhcheck;
529: } else {
1.24 itojun 530: /* address is not ready, so discard the packet. */
1.34 itojun 531: nd6log((LOG_INFO,
1.27 itojun 532: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 533: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 534: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 535:
536: goto bad;
1.2 itojun 537: }
538: }
539:
540: /*
1.55 itojun 541: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 542: */
543: #if defined(NFAITH) && 0 < NFAITH
544: if (ip6_keepfaith) {
1.71 itojun 545: if (ip6_forward_rt.ro_rt && ip6_forward_rt.ro_rt->rt_ifp &&
546: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 547: /* XXX do we need more sanity checks? */
548: ours = 1;
1.45 itojun 549: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 550: goto hbhcheck;
551: }
552: }
553: #endif
554:
555: #if 0
556: {
557: /*
558: * Last resort: check in6_ifaddr for incoming interface.
559: * The code is here until I update the "goto ours hack" code above
560: * working right.
561: */
562: struct ifaddr *ifa;
563: for (ifa = m->m_pkthdr.rcvif->if_addrlist.tqh_first;
564: ifa;
565: ifa = ifa->ifa_list.tqe_next) {
566: if (ifa->ifa_addr == NULL)
567: continue; /* just for safety */
568: if (ifa->ifa_addr->sa_family != AF_INET6)
569: continue;
570: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
571: ours = 1;
572: deliverifp = ifa->ifa_ifp;
1.2 itojun 573: goto hbhcheck;
574: }
575: }
1.9 itojun 576: }
1.2 itojun 577: #endif
578:
579: /*
580: * Now there is no reason to process the packet if it's not our own
581: * and we're not a router.
582: */
583: if (!ip6_forwarding) {
584: ip6stat.ip6s_cantforward++;
1.9 itojun 585: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 586: goto bad;
587: }
588:
589: hbhcheck:
590: /*
1.81 rpaulo 591: * record address information into m_tag, if we don't have one yet.
592: * note that we are unable to record it, if the address is not listed
593: * as our interface address (e.g. multicast addresses, addresses
594: * within FAITH prefixes and such).
595: */
596: if (deliverifp && !ip6_getdstifaddr(m)) {
597: struct in6_ifaddr *ia6;
598:
599: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
600: if (ia6) {
601: if (!ip6_setdstifaddr(m, ia6)) {
602: /*
603: * XXX maybe we should drop the packet here,
604: * as we could not provide enough information
605: * to the upper layers.
606: */
607: }
608: }
609: }
610:
611: /*
1.2 itojun 612: * Process Hop-by-Hop options header if it's contained.
613: * m may be modified in ip6_hopopts_input().
614: * If a JumboPayload option is included, plen will also be modified.
615: */
616: plen = (u_int32_t)ntohs(ip6->ip6_plen);
617: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 618: struct ip6_hbh *hbh;
619:
620: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
621: #if 0 /*touches NULL pointer*/
622: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
623: #endif
1.2 itojun 624: return; /* m have already been freed */
1.9 itojun 625: }
1.22 itojun 626:
1.2 itojun 627: /* adjust pointer */
628: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 629:
630: /*
1.49 itojun 631: * if the payload length field is 0 and the next header field
1.22 itojun 632: * indicates Hop-by-Hop Options header, then a Jumbo Payload
633: * option MUST be included.
634: */
635: if (ip6->ip6_plen == 0 && plen == 0) {
636: /*
637: * Note that if a valid jumbo payload option is
1.83 rpaulo 638: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 639: * (non-zero) payload length to the variable plen.
1.22 itojun 640: */
641: ip6stat.ip6s_badoptions++;
642: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
643: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
644: icmp6_error(m, ICMP6_PARAM_PROB,
645: ICMP6_PARAMPROB_HEADER,
646: (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
647: return;
648: }
1.9 itojun 649: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
650: sizeof(struct ip6_hbh));
651: if (hbh == NULL) {
652: ip6stat.ip6s_tooshort++;
653: return;
654: }
1.57 thorpej 655: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 656: nxt = hbh->ip6h_nxt;
1.2 itojun 657:
658: /*
659: * accept the packet if a router alert option is included
660: * and we act as an IPv6 router.
661: */
1.5 itojun 662: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 663: ours = 1;
664: } else
665: nxt = ip6->ip6_nxt;
666:
667: /*
668: * Check that the amount of data in the buffers
669: * is as at least much as the IPv6 header would have us expect.
670: * Trim mbufs if longer than we expect.
671: * Drop packet if shorter than we expect.
672: */
673: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
674: ip6stat.ip6s_tooshort++;
1.9 itojun 675: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 676: goto bad;
677: }
678: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
679: if (m->m_len == m->m_pkthdr.len) {
680: m->m_len = sizeof(struct ip6_hdr) + plen;
681: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
682: } else
683: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
684: }
685:
686: /*
687: * Forward if desirable.
688: */
689: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
690: /*
691: * If we are acting as a multicast router, all
692: * incoming multicast packets are passed to the
693: * kernel-level multicast forwarding function.
694: * The packet is returned (relatively) intact; if
695: * ip6_mforward() returns a non-zero value, the packet
696: * must be discarded, else it may be accepted below.
697: */
698: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
699: ip6stat.ip6s_cantforward++;
700: m_freem(m);
701: return;
702: }
703: if (!ours) {
704: m_freem(m);
705: return;
706: }
1.22 itojun 707: } else if (!ours) {
1.64 itojun 708: ip6_forward(m, srcrt);
1.2 itojun 709: return;
1.56 itojun 710: }
1.25 itojun 711:
712: ip6 = mtod(m, struct ip6_hdr *);
713:
714: /*
715: * Malicious party may be able to use IPv4 mapped addr to confuse
716: * tcp/udp stack and bypass security checks (act as if it was from
717: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
718: *
719: * For SIIT end node behavior, you may want to disable the check.
720: * However, you will become vulnerable to attacks using IPv4 mapped
721: * source.
722: */
723: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
724: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
725: ip6stat.ip6s_badscope++;
726: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
727: goto bad;
728: }
1.2 itojun 729:
730: /*
731: * Tell launch routine the next header
732: */
1.12 itojun 733: #ifdef IFA_STATS
1.28 itojun 734: if (deliverifp != NULL) {
1.9 itojun 735: struct in6_ifaddr *ia6;
736: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
737: if (ia6)
738: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
739: }
740: #endif
1.2 itojun 741: ip6stat.ip6s_delivered++;
1.9 itojun 742: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 743: nest = 0;
1.40 itojun 744:
1.2 itojun 745: while (nxt != IPPROTO_DONE) {
746: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
747: ip6stat.ip6s_toomanyhdr++;
748: goto bad;
749: }
1.8 itojun 750:
751: /*
752: * protection against faulty packet - there should be
753: * more sanity checks in header chain processing.
754: */
755: if (m->m_pkthdr.len < off) {
756: ip6stat.ip6s_tooshort++;
1.9 itojun 757: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 758: goto bad;
759: }
760:
1.37 itojun 761: #ifdef IPSEC
762: /*
763: * enforce IPsec policy checking if we are seeing last header.
764: * note that we do not visit this with protocols with pcb layer
765: * code - like udp/tcp/raw ip.
766: */
767: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
768: ipsec6_in_reject(m, NULL)) {
769: ipsec6stat.in_polvio++;
770: goto bad;
771: }
772: #endif
1.90.2.1.2.1! wrstuden 773: #ifdef FAST_IPSEC
! 774: /*
! 775: * enforce IPsec policy checking if we are seeing last header.
! 776: * note that we do not visit this with protocols with pcb layer
! 777: * code - like udp/tcp/raw ip.
! 778: */
! 779: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
! 780: /*
! 781: * Check if the packet has already had IPsec processing
! 782: * done. If so, then just pass it along. This tag gets
! 783: * set during AH, ESP, etc. input handling, before the
! 784: * packet is returned to the ip input queue for delivery.
! 785: */
! 786: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
! 787: s = splsoftnet();
! 788: if (mtag != NULL) {
! 789: tdbi = (struct tdb_ident *)(mtag + 1);
! 790: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
! 791: } else {
! 792: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
! 793: IP_FORWARDING, &error);
! 794: }
! 795: if (sp != NULL) {
! 796: /*
! 797: * Check security policy against packet attributes.
! 798: */
! 799: error = ipsec_in_reject(sp, m);
! 800: KEY_FREESP(&sp);
! 801: } else {
! 802: /* XXX error stat??? */
! 803: error = EINVAL;
! 804: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
! 805: goto bad;
! 806: }
! 807: splx(s);
! 808: if (error)
! 809: goto bad;
! 810: }
! 811: #endif /* FAST_IPSEC */
! 812:
1.56 itojun 813:
1.2 itojun 814: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
815: }
816: return;
817: bad:
818: m_freem(m);
819: }
820:
821: /*
1.81 rpaulo 822: * set/grab in6_ifaddr correspond to IPv6 destination address.
823: */
824: static struct m_tag *
825: ip6_setdstifaddr(m, ia6)
826: struct mbuf *m;
827: struct in6_ifaddr *ia6;
828: {
829: struct m_tag *mtag;
830:
831: mtag = ip6_addaux(m);
832: if (mtag)
833: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
834: return mtag; /* NULL if failed to set */
835: }
836:
837: struct in6_ifaddr *
838: ip6_getdstifaddr(m)
839: struct mbuf *m;
840: {
841: struct m_tag *mtag;
842:
843: mtag = ip6_findaux(m);
844: if (mtag)
845: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
846: else
847: return NULL;
848: }
849:
850: /*
1.2 itojun 851: * Hop-by-Hop options header processing. If a valid jumbo payload option is
852: * included, the real payload length will be stored in plenp.
853: */
854: static int
855: ip6_hopopts_input(plenp, rtalertp, mp, offp)
856: u_int32_t *plenp;
1.5 itojun 857: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 858: struct mbuf **mp;
859: int *offp;
860: {
1.35 itojun 861: struct mbuf *m = *mp;
1.2 itojun 862: int off = *offp, hbhlen;
863: struct ip6_hbh *hbh;
864:
865: /* validation of the length of the header */
1.9 itojun 866: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
867: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
868: if (hbh == NULL) {
869: ip6stat.ip6s_tooshort++;
870: return -1;
871: }
872: hbhlen = (hbh->ip6h_len + 1) << 3;
873: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
874: hbhlen);
875: if (hbh == NULL) {
876: ip6stat.ip6s_tooshort++;
877: return -1;
878: }
1.57 thorpej 879: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 880: off += hbhlen;
881: hbhlen -= sizeof(struct ip6_hbh);
882:
883: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
884: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 885: return (-1);
1.2 itojun 886:
887: *offp = off;
888: *mp = m;
1.58 itojun 889: return (0);
1.2 itojun 890: }
891:
892: /*
893: * Search header for all Hop-by-hop options and process each option.
894: * This function is separate from ip6_hopopts_input() in order to
895: * handle a case where the sending node itself process its hop-by-hop
896: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 897: *
898: * The function assumes that hbh header is located right after the IPv6 header
899: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
900: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 901: */
902: int
903: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
904: struct mbuf *m;
905: u_int8_t *opthead;
906: int hbhlen;
1.5 itojun 907: u_int32_t *rtalertp;
1.2 itojun 908: u_int32_t *plenp;
909: {
910: struct ip6_hdr *ip6;
911: int optlen = 0;
912: u_int8_t *opt = opthead;
913: u_int16_t rtalert_val;
1.22 itojun 914: u_int32_t jumboplen;
1.55 itojun 915: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 916:
917: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 918: switch (*opt) {
919: case IP6OPT_PAD1:
920: optlen = 1;
921: break;
922: case IP6OPT_PADN:
923: if (hbhlen < IP6OPT_MINLEN) {
924: ip6stat.ip6s_toosmall++;
925: goto bad;
926: }
927: optlen = *(opt + 1) + 2;
928: break;
929: case IP6OPT_RTALERT:
930: /* XXX may need check for alignment */
931: if (hbhlen < IP6OPT_RTALERT_LEN) {
932: ip6stat.ip6s_toosmall++;
933: goto bad;
934: }
935: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 936: /* XXX stat */
937: icmp6_error(m, ICMP6_PARAM_PROB,
938: ICMP6_PARAMPROB_HEADER,
939: erroff + opt + 1 - opthead);
940: return (-1);
1.35 itojun 941: }
942: optlen = IP6OPT_RTALERT_LEN;
943: bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
944: *rtalertp = ntohs(rtalert_val);
945: break;
946: case IP6OPT_JUMBO:
1.22 itojun 947: /* XXX may need check for alignment */
948: if (hbhlen < IP6OPT_JUMBO_LEN) {
949: ip6stat.ip6s_toosmall++;
950: goto bad;
951: }
1.35 itojun 952: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 953: /* XXX stat */
954: icmp6_error(m, ICMP6_PARAM_PROB,
955: ICMP6_PARAMPROB_HEADER,
956: erroff + opt + 1 - opthead);
957: return (-1);
1.35 itojun 958: }
1.22 itojun 959: optlen = IP6OPT_JUMBO_LEN;
960:
961: /*
962: * IPv6 packets that have non 0 payload length
1.35 itojun 963: * must not contain a jumbo payload option.
1.22 itojun 964: */
965: ip6 = mtod(m, struct ip6_hdr *);
966: if (ip6->ip6_plen) {
967: ip6stat.ip6s_badoptions++;
968: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 969: ICMP6_PARAMPROB_HEADER,
970: erroff + opt - opthead);
971: return (-1);
1.22 itojun 972: }
1.2 itojun 973:
1.22 itojun 974: /*
975: * We may see jumbolen in unaligned location, so
976: * we'd need to perform bcopy().
977: */
978: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
979: jumboplen = (u_int32_t)htonl(jumboplen);
980:
981: #if 1
982: /*
983: * if there are multiple jumbo payload options,
984: * *plenp will be non-zero and the packet will be
985: * rejected.
986: * the behavior may need some debate in ipngwg -
987: * multiple options does not make sense, however,
988: * there's no explicit mention in specification.
989: */
990: if (*plenp != 0) {
991: ip6stat.ip6s_badoptions++;
992: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 993: ICMP6_PARAMPROB_HEADER,
994: erroff + opt + 2 - opthead);
995: return (-1);
1.22 itojun 996: }
1.8 itojun 997: #endif
1.2 itojun 998:
1.22 itojun 999: /*
1000: * jumbo payload length must be larger than 65535.
1001: */
1002: if (jumboplen <= IPV6_MAXPACKET) {
1003: ip6stat.ip6s_badoptions++;
1004: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1005: ICMP6_PARAMPROB_HEADER,
1006: erroff + opt + 2 - opthead);
1007: return (-1);
1.22 itojun 1008: }
1009: *plenp = jumboplen;
1010:
1011: break;
1.35 itojun 1012: default: /* unknown option */
1013: if (hbhlen < IP6OPT_MINLEN) {
1014: ip6stat.ip6s_toosmall++;
1015: goto bad;
1016: }
1.55 itojun 1017: optlen = ip6_unknown_opt(opt, m,
1018: erroff + opt - opthead);
1019: if (optlen == -1)
1020: return (-1);
1.35 itojun 1021: optlen += 2;
1022: break;
1.2 itojun 1023: }
1024: }
1025:
1.55 itojun 1026: return (0);
1.2 itojun 1027:
1028: bad:
1029: m_freem(m);
1.55 itojun 1030: return (-1);
1.2 itojun 1031: }
1032:
1033: /*
1034: * Unknown option processing.
1035: * The third argument `off' is the offset from the IPv6 header to the option,
1036: * which is necessary if the IPv6 header the and option header and IPv6 header
1037: * is not continuous in order to return an ICMPv6 error.
1038: */
1039: int
1040: ip6_unknown_opt(optp, m, off)
1041: u_int8_t *optp;
1042: struct mbuf *m;
1043: int off;
1044: {
1045: struct ip6_hdr *ip6;
1046:
1.35 itojun 1047: switch (IP6OPT_TYPE(*optp)) {
1048: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1049: return ((int)*(optp + 1));
1.35 itojun 1050: case IP6OPT_TYPE_DISCARD: /* silently discard */
1051: m_freem(m);
1.58 itojun 1052: return (-1);
1.35 itojun 1053: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1054: ip6stat.ip6s_badoptions++;
1055: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1056: return (-1);
1.35 itojun 1057: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1058: ip6stat.ip6s_badoptions++;
1059: ip6 = mtod(m, struct ip6_hdr *);
1060: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1061: (m->m_flags & (M_BCAST|M_MCAST)))
1062: m_freem(m);
1063: else
1064: icmp6_error(m, ICMP6_PARAM_PROB,
1065: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1066: return (-1);
1.2 itojun 1067: }
1068:
1069: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1070: return (-1);
1.2 itojun 1071: }
1072:
1073: /*
1.9 itojun 1074: * Create the "control" list for this pcb.
1075: *
1076: * The routine will be called from upper layer handlers like tcp6_input().
1077: * Thus the routine assumes that the caller (tcp6_input) have already
1078: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1079: * very first mbuf on the mbuf chain.
1080: * We may want to add some infinite loop prevention or sanity checks for safety.
1081: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1082: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1083: */
1084: void
1085: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 1086: struct in6pcb *in6p;
1087: struct mbuf **mp;
1088: struct ip6_hdr *ip6;
1089: struct mbuf *m;
1.2 itojun 1090: {
1.85 rpaulo 1091: #ifdef RFC2292
1092: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1093: #else
1094: #define IS2292(x, y) (y)
1095: #endif
1096:
1.9 itojun 1097: #ifdef SO_TIMESTAMP
1.2 itojun 1098: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1099: struct timeval tv;
1100:
1101: microtime(&tv);
1102: *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
1.63 itojun 1103: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1104: if (*mp)
1105: mp = &(*mp)->m_next;
1106: }
1.9 itojun 1107: #endif
1.87 rpaulo 1108:
1109: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1110: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1111: return;
1112:
1.2 itojun 1113: /* RFC 2292 sec. 5 */
1.35 itojun 1114: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1115: struct in6_pktinfo pi6;
1.85 rpaulo 1116:
1.2 itojun 1117: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1118: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1119: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1120: m->m_pkthdr.rcvif->if_index : 0;
1.2 itojun 1121: *mp = sbcreatecontrol((caddr_t) &pi6,
1.85 rpaulo 1122: sizeof(struct in6_pktinfo),
1123: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1124: if (*mp)
1125: mp = &(*mp)->m_next;
1126: }
1.85 rpaulo 1127:
1.2 itojun 1128: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1129: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1130:
1.63 itojun 1131: *mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),
1.85 rpaulo 1132: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1133: if (*mp)
1134: mp = &(*mp)->m_next;
1135: }
1136:
1137: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1138: u_int32_t flowinfo;
1139: int tclass;
1140:
1141: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1142: flowinfo >>= 20;
1143:
1144: tclass = flowinfo & 0xff;
1145: *mp = sbcreatecontrol((caddr_t)&tclass, sizeof(tclass),
1146: IPV6_TCLASS, IPPROTO_IPV6);
1147:
1.2 itojun 1148: if (*mp)
1149: mp = &(*mp)->m_next;
1150: }
1151:
1152: /*
1.75 itojun 1153: * IPV6_HOPOPTS socket option. Recall that we required super-user
1154: * privilege for the option (see ip6_ctloutput), but it might be too
1155: * strict, since there might be some hop-by-hop options which can be
1156: * returned to normal user.
1.85 rpaulo 1157: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1158: */
1.75 itojun 1159: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1160: /*
1161: * Check if a hop-by-hop options header is contatined in the
1162: * received packet, and if so, store the options as ancillary
1163: * data. Note that a hop-by-hop options header must be
1164: * just after the IPv6 header, which fact is assured through
1165: * the IPv6 input processing.
1166: */
1.78 christos 1167: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1168: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1169: struct ip6_hbh *hbh;
1170: int hbhlen;
1.62 itojun 1171: struct mbuf *ext;
1.9 itojun 1172:
1.62 itojun 1173: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1174: xip6->ip6_nxt);
1.62 itojun 1175: if (ext == NULL) {
1.9 itojun 1176: ip6stat.ip6s_tooshort++;
1177: return;
1178: }
1.62 itojun 1179: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1180: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1181: if (hbhlen != ext->m_len) {
1182: m_freem(ext);
1.9 itojun 1183: ip6stat.ip6s_tooshort++;
1184: return;
1185: }
1.2 itojun 1186:
1187: /*
1188: * XXX: We copy whole the header even if a jumbo
1189: * payload option is included, which option is to
1190: * be removed before returning in the RFC 2292.
1.85 rpaulo 1191: * Note: this constraint is removed in RFC3542.
1.2 itojun 1192: */
1.9 itojun 1193: *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
1.85 rpaulo 1194: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1195: IPPROTO_IPV6);
1.2 itojun 1196: if (*mp)
1197: mp = &(*mp)->m_next;
1.62 itojun 1198: m_freem(ext);
1.2 itojun 1199: }
1200: }
1201:
1202: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1203: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1204: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1205: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1206:
1207: /*
1208: * Search for destination options headers or routing
1209: * header(s) through the header chain, and stores each
1210: * header as ancillary data.
1211: * Note that the order of the headers remains in
1212: * the chain of ancillary data.
1213: */
1.86 rpaulo 1214: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1215: struct ip6_ext *ip6e = NULL;
1.9 itojun 1216: int elen;
1.62 itojun 1217: struct mbuf *ext = NULL;
1.9 itojun 1218:
1.62 itojun 1219: /*
1220: * if it is not an extension header, don't try to
1221: * pull it from the chain.
1222: */
1223: switch (nxt) {
1224: case IPPROTO_DSTOPTS:
1225: case IPPROTO_ROUTING:
1226: case IPPROTO_HOPOPTS:
1227: case IPPROTO_AH: /* is it possible? */
1228: break;
1229: default:
1230: goto loopend;
1231: }
1232:
1233: ext = ip6_pullexthdr(m, off, nxt);
1234: if (ext == NULL) {
1.9 itojun 1235: ip6stat.ip6s_tooshort++;
1236: return;
1237: }
1.62 itojun 1238: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1239: if (nxt == IPPROTO_AH)
1240: elen = (ip6e->ip6e_len + 2) << 2;
1241: else
1242: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1243: if (elen != ext->m_len) {
1244: m_freem(ext);
1.9 itojun 1245: ip6stat.ip6s_tooshort++;
1246: return;
1247: }
1.57 thorpej 1248: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1249:
1.35 itojun 1250: switch (nxt) {
1.62 itojun 1251: case IPPROTO_DSTOPTS:
1.35 itojun 1252: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1253: break;
1254:
1255: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.85 rpaulo 1256: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1257: IPPROTO_IPV6);
1.35 itojun 1258: if (*mp)
1259: mp = &(*mp)->m_next;
1260: break;
1261:
1262: case IPPROTO_ROUTING:
1263: if (!in6p->in6p_flags & IN6P_RTHDR)
1264: break;
1265:
1266: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.85 rpaulo 1267: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1268: IPPROTO_IPV6);
1.35 itojun 1269: if (*mp)
1270: mp = &(*mp)->m_next;
1271: break;
1272:
1.62 itojun 1273: case IPPROTO_HOPOPTS:
1274: case IPPROTO_AH: /* is it possible? */
1275: break;
1276:
1.35 itojun 1277: default:
1278: /*
1.62 itojun 1279: * other cases have been filtered in the above.
1280: * none will visit this case. here we supply
1281: * the code just in case (nxt overwritten or
1282: * other cases).
1.35 itojun 1283: */
1.62 itojun 1284: m_freem(ext);
1.35 itojun 1285: goto loopend;
1286:
1.2 itojun 1287: }
1288:
1289: /* proceed with the next header. */
1.9 itojun 1290: off += elen;
1.2 itojun 1291: nxt = ip6e->ip6e_nxt;
1.62 itojun 1292: ip6e = NULL;
1293: m_freem(ext);
1294: ext = NULL;
1.2 itojun 1295: }
1296: loopend:
1.62 itojun 1297: ;
1.2 itojun 1298: }
1.62 itojun 1299: }
1.85 rpaulo 1300: #undef IS2292
1301:
1302:
1303: void
1304: ip6_notify_pmtu(struct in6pcb *in6p, struct sockaddr_in6 *dst, uint32_t *mtu)
1305: {
1306: struct socket *so;
1307: struct mbuf *m_mtu;
1308: struct ip6_mtuinfo mtuctl;
1309:
1310: so = in6p->in6p_socket;
1311:
1312: if (mtu == NULL)
1313: return;
1314:
1315: #ifdef DIAGNOSTIC
1316: if (so == NULL) /* I believe this is impossible */
1317: panic("ip6_notify_pmtu: socket is NULL");
1318: #endif
1319:
1320: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1321: mtuctl.ip6m_mtu = *mtu;
1322: mtuctl.ip6m_addr = *dst;
1323: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1324: return;
1325:
1326: if ((m_mtu = sbcreatecontrol((caddr_t)&mtuctl, sizeof(mtuctl),
1327: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1328: return;
1329:
1330: if (sbappendaddr(&so->so_rcv, (struct sockaddr *)dst, NULL, m_mtu)
1331: == 0) {
1332: m_freem(m_mtu);
1333: /* XXX: should count statistics */
1334: } else
1335: sorwakeup(so);
1336:
1337: return;
1338: }
1.62 itojun 1339:
1340: /*
1341: * pull single extension header from mbuf chain. returns single mbuf that
1342: * contains the result, or NULL on error.
1343: */
1344: static struct mbuf *
1345: ip6_pullexthdr(m, off, nxt)
1346: struct mbuf *m;
1347: size_t off;
1348: int nxt;
1349: {
1350: struct ip6_ext ip6e;
1351: size_t elen;
1352: struct mbuf *n;
1353:
1354: #ifdef DIAGNOSTIC
1355: switch (nxt) {
1356: case IPPROTO_DSTOPTS:
1357: case IPPROTO_ROUTING:
1358: case IPPROTO_HOPOPTS:
1359: case IPPROTO_AH: /* is it possible? */
1360: break;
1361: default:
1362: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1363: }
1.62 itojun 1364: #endif
1.2 itojun 1365:
1.62 itojun 1366: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1367: if (nxt == IPPROTO_AH)
1368: elen = (ip6e.ip6e_len + 2) << 2;
1369: else
1370: elen = (ip6e.ip6e_len + 1) << 3;
1371:
1372: MGET(n, M_DONTWAIT, MT_DATA);
1373: if (n && elen >= MLEN) {
1374: MCLGET(n, M_DONTWAIT);
1375: if ((n->m_flags & M_EXT) == 0) {
1376: m_free(n);
1377: n = NULL;
1378: }
1379: }
1380: if (!n)
1381: return NULL;
1382:
1383: n->m_len = 0;
1384: if (elen >= M_TRAILINGSPACE(n)) {
1385: m_free(n);
1386: return NULL;
1387: }
1388:
1389: m_copydata(m, off, elen, mtod(n, caddr_t));
1390: n->m_len = elen;
1391: return n;
1.2 itojun 1392: }
1393:
1394: /*
1395: * Get pointer to the previous header followed by the header
1396: * currently processed.
1397: * XXX: This function supposes that
1398: * M includes all headers,
1399: * the next header field and the header length field of each header
1400: * are valid, and
1401: * the sum of each header length equals to OFF.
1402: * Because of these assumptions, this function must be called very
1403: * carefully. Moreover, it will not be used in the near future when
1404: * we develop `neater' mechanism to process extension headers.
1405: */
1.58 itojun 1406: u_int8_t *
1.2 itojun 1407: ip6_get_prevhdr(m, off)
1408: struct mbuf *m;
1409: int off;
1410: {
1411: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1412:
1413: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1414: return (&ip6->ip6_nxt);
1.2 itojun 1415: else {
1416: int len, nxt;
1417: struct ip6_ext *ip6e = NULL;
1418:
1419: nxt = ip6->ip6_nxt;
1420: len = sizeof(struct ip6_hdr);
1421: while (len < off) {
1422: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
1423:
1.35 itojun 1424: switch (nxt) {
1.2 itojun 1425: case IPPROTO_FRAGMENT:
1426: len += sizeof(struct ip6_frag);
1427: break;
1428: case IPPROTO_AH:
1429: len += (ip6e->ip6e_len + 2) << 2;
1430: break;
1431: default:
1432: len += (ip6e->ip6e_len + 1) << 3;
1433: break;
1434: }
1435: nxt = ip6e->ip6e_nxt;
1436: }
1437: if (ip6e)
1.58 itojun 1438: return (&ip6e->ip6e_nxt);
1.2 itojun 1439: else
1440: return NULL;
1.18 itojun 1441: }
1442: }
1443:
1444: /*
1445: * get next header offset. m will be retained.
1446: */
1447: int
1448: ip6_nexthdr(m, off, proto, nxtp)
1449: struct mbuf *m;
1450: int off;
1451: int proto;
1452: int *nxtp;
1453: {
1454: struct ip6_hdr ip6;
1455: struct ip6_ext ip6e;
1456: struct ip6_frag fh;
1457:
1458: /* just in case */
1459: if (m == NULL)
1460: panic("ip6_nexthdr: m == NULL");
1461: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1462: return -1;
1463:
1464: switch (proto) {
1465: case IPPROTO_IPV6:
1.83 rpaulo 1466: /* do not chase beyond intermediate IPv6 headers */
1467: if (off != 0)
1468: return -1;
1.18 itojun 1469: if (m->m_pkthdr.len < off + sizeof(ip6))
1470: return -1;
1471: m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
1472: if (nxtp)
1473: *nxtp = ip6.ip6_nxt;
1474: off += sizeof(ip6);
1475: return off;
1476:
1477: case IPPROTO_FRAGMENT:
1478: /*
1479: * terminate parsing if it is not the first fragment,
1480: * it does not make sense to parse through it.
1481: */
1482: if (m->m_pkthdr.len < off + sizeof(fh))
1483: return -1;
1484: m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
1.67 itojun 1485: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1486: return -1;
1487: if (nxtp)
1488: *nxtp = fh.ip6f_nxt;
1489: off += sizeof(struct ip6_frag);
1490: return off;
1491:
1492: case IPPROTO_AH:
1493: if (m->m_pkthdr.len < off + sizeof(ip6e))
1494: return -1;
1495: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1496: if (nxtp)
1497: *nxtp = ip6e.ip6e_nxt;
1498: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1499: if (m->m_pkthdr.len < off)
1500: return -1;
1.18 itojun 1501: return off;
1502:
1503: case IPPROTO_HOPOPTS:
1504: case IPPROTO_ROUTING:
1505: case IPPROTO_DSTOPTS:
1506: if (m->m_pkthdr.len < off + sizeof(ip6e))
1507: return -1;
1508: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1509: if (nxtp)
1510: *nxtp = ip6e.ip6e_nxt;
1511: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1512: if (m->m_pkthdr.len < off)
1513: return -1;
1.18 itojun 1514: return off;
1515:
1516: case IPPROTO_NONE:
1517: case IPPROTO_ESP:
1518: case IPPROTO_IPCOMP:
1519: /* give up */
1520: return -1;
1521:
1522: default:
1523: return -1;
1524: }
1525: }
1526:
1527: /*
1528: * get offset for the last header in the chain. m will be kept untainted.
1529: */
1530: int
1531: ip6_lasthdr(m, off, proto, nxtp)
1532: struct mbuf *m;
1533: int off;
1534: int proto;
1535: int *nxtp;
1536: {
1537: int newoff;
1538: int nxt;
1539:
1540: if (!nxtp) {
1541: nxt = -1;
1542: nxtp = &nxt;
1543: }
1.86 rpaulo 1544: for (;;) {
1.18 itojun 1545: newoff = ip6_nexthdr(m, off, proto, nxtp);
1546: if (newoff < 0)
1547: return off;
1548: else if (newoff < off)
1549: return -1; /* invalid */
1550: else if (newoff == off)
1551: return newoff;
1552:
1553: off = newoff;
1554: proto = *nxtp;
1.2 itojun 1555: }
1556: }
1557:
1.81 rpaulo 1558: struct m_tag *
1559: ip6_addaux(m)
1560: struct mbuf *m;
1561: {
1562: struct m_tag *mtag;
1563:
1564: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1565: if (!mtag) {
1566: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1567: M_NOWAIT);
1568: if (mtag) {
1569: m_tag_prepend(m, mtag);
1570: bzero(mtag + 1, sizeof(struct ip6aux));
1571: }
1572: }
1573: return mtag;
1574: }
1575:
1576: struct m_tag *
1577: ip6_findaux(m)
1578: struct mbuf *m;
1579: {
1580: struct m_tag *mtag;
1581:
1582: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1583: return mtag;
1584: }
1585:
1586: void
1587: ip6_delaux(m)
1588: struct mbuf *m;
1589: {
1590: struct m_tag *mtag;
1591:
1592: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1593: if (mtag)
1594: m_tag_delete(m, mtag);
1595: }
1596:
1.90.2.1 bouyer 1597: static int
1598: sysctl_net_inet6_ip6_rht0(SYSCTLFN_ARGS)
1599: {
1600: int error, tmp;
1601: struct sysctlnode node;
1602:
1603: node = *rnode;
1604: tmp = ip6_rht0;
1605: node.sysctl_data = &tmp;
1606: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1607: if (error || newp == NULL)
1608: return error;
1609:
1610: switch (tmp) {
1611: case -1: /* disable processing */
1612: case 0: /* disable for host, enable for router */
1613: case 1: /* enable for all */
1614: break;
1615: default:
1616: return EINVAL;
1617: }
1618: ip6_rht0 = tmp;
1619: return 0;
1620: }
1621:
1.2 itojun 1622: /*
1623: * System control for IP6
1624: */
1625:
1626: u_char inet6ctlerrmap[PRC_NCMDS] = {
1627: 0, 0, 0, 0,
1628: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1629: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1630: EMSGSIZE, EHOSTUNREACH, 0, 0,
1631: 0, 0, 0, 0,
1632: ENOPROTOOPT
1633: };
1634:
1.70 atatat 1635: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1636: {
1.85 rpaulo 1637: #ifdef RFC2292
1638: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1639: #else
1640: #define IS2292(x, y) (y)
1641: #endif
1.26 itojun 1642:
1.73 atatat 1643: sysctl_createv(clog, 0, NULL, NULL,
1644: CTLFLAG_PERMANENT,
1.70 atatat 1645: CTLTYPE_NODE, "net", NULL,
1646: NULL, 0, NULL, 0,
1647: CTL_NET, CTL_EOL);
1.73 atatat 1648: sysctl_createv(clog, 0, NULL, NULL,
1649: CTLFLAG_PERMANENT,
1.74 atatat 1650: CTLTYPE_NODE, "inet6",
1651: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1652: NULL, 0, NULL, 0,
1653: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1654: sysctl_createv(clog, 0, NULL, NULL,
1655: CTLFLAG_PERMANENT,
1.74 atatat 1656: CTLTYPE_NODE, "ip6",
1657: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1658: NULL, 0, NULL, 0,
1659: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1660:
1.73 atatat 1661: sysctl_createv(clog, 0, NULL, NULL,
1662: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1663: CTLTYPE_INT, "forwarding",
1664: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1665: NULL, 0, &ip6_forwarding, 0,
1666: CTL_NET, PF_INET6, IPPROTO_IPV6,
1667: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1668: sysctl_createv(clog, 0, NULL, NULL,
1669: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1670: CTLTYPE_INT, "redirect",
1671: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1672: NULL, 0, &ip6_sendredirects, 0,
1673: CTL_NET, PF_INET6, IPPROTO_IPV6,
1674: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1675: sysctl_createv(clog, 0, NULL, NULL,
1676: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1677: CTLTYPE_INT, "hlim",
1678: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1679: NULL, 0, &ip6_defhlim, 0,
1680: CTL_NET, PF_INET6, IPPROTO_IPV6,
1681: IPV6CTL_DEFHLIM, CTL_EOL);
1682: #ifdef notyet
1.73 atatat 1683: sysctl_createv(clog, 0, NULL, NULL,
1684: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1685: CTLTYPE_INT, "mtu", NULL,
1686: NULL, 0, &, 0,
1687: CTL_NET, PF_INET6, IPPROTO_IPV6,
1688: IPV6CTL_DEFMTU, CTL_EOL);
1689: #endif
1690: #ifdef __no_idea__
1.73 atatat 1691: sysctl_createv(clog, 0, NULL, NULL,
1692: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1693: CTLTYPE_INT, "forwsrcrt", NULL,
1694: NULL, 0, &?, 0,
1695: CTL_NET, PF_INET6, IPPROTO_IPV6,
1696: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1697: sysctl_createv(clog, 0, NULL, NULL,
1698: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1699: CTLTYPE_STRUCT, "mrtstats", NULL,
1700: NULL, 0, &?, sizeof(?),
1701: CTL_NET, PF_INET6, IPPROTO_IPV6,
1702: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1703: sysctl_createv(clog, 0, NULL, NULL,
1704: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1705: CTLTYPE_?, "mrtproto", NULL,
1706: NULL, 0, &?, sizeof(?),
1707: CTL_NET, PF_INET6, IPPROTO_IPV6,
1708: IPV6CTL_MRTPROTO, CTL_EOL);
1709: #endif
1.73 atatat 1710: sysctl_createv(clog, 0, NULL, NULL,
1711: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1712: CTLTYPE_INT, "maxfragpackets",
1713: SYSCTL_DESCR("Maximum number of fragments to buffer "
1714: "for reassembly"),
1.70 atatat 1715: NULL, 0, &ip6_maxfragpackets, 0,
1716: CTL_NET, PF_INET6, IPPROTO_IPV6,
1717: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1718: #ifdef __no_idea__
1.73 atatat 1719: sysctl_createv(clog, 0, NULL, NULL,
1720: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1721: CTLTYPE_INT, "sourcecheck", NULL,
1722: NULL, 0, &?, 0,
1723: CTL_NET, PF_INET6, IPPROTO_IPV6,
1724: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1725: sysctl_createv(clog, 0, NULL, NULL,
1726: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1727: CTLTYPE_INT, "sourcecheck_logint", NULL,
1728: NULL, 0, &?, 0,
1729: CTL_NET, PF_INET6, IPPROTO_IPV6,
1730: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1731: #endif
1.73 atatat 1732: sysctl_createv(clog, 0, NULL, NULL,
1733: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1734: CTLTYPE_INT, "accept_rtadv",
1735: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1736: NULL, 0, &ip6_accept_rtadv, 0,
1737: CTL_NET, PF_INET6, IPPROTO_IPV6,
1738: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1739: sysctl_createv(clog, 0, NULL, NULL,
1740: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1741: CTLTYPE_INT, "keepfaith",
1742: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1743: NULL, 0, &ip6_keepfaith, 0,
1744: CTL_NET, PF_INET6, IPPROTO_IPV6,
1745: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1746: sysctl_createv(clog, 0, NULL, NULL,
1747: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1748: CTLTYPE_INT, "log_interval",
1749: SYSCTL_DESCR("Minumum interval between logging "
1750: "unroutable packets"),
1.70 atatat 1751: NULL, 0, &ip6_log_interval, 0,
1752: CTL_NET, PF_INET6, IPPROTO_IPV6,
1753: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1754: sysctl_createv(clog, 0, NULL, NULL,
1755: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1756: CTLTYPE_INT, "hdrnestlimit",
1757: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1758: NULL, 0, &ip6_hdrnestlimit, 0,
1759: CTL_NET, PF_INET6, IPPROTO_IPV6,
1760: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1761: sysctl_createv(clog, 0, NULL, NULL,
1762: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1763: CTLTYPE_INT, "dad_count",
1764: SYSCTL_DESCR("Number of Duplicate Address Detection "
1765: "probes to send"),
1.70 atatat 1766: NULL, 0, &ip6_dad_count, 0,
1767: CTL_NET, PF_INET6, IPPROTO_IPV6,
1768: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1769: sysctl_createv(clog, 0, NULL, NULL,
1770: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1771: CTLTYPE_INT, "auto_flowlabel",
1772: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1773: NULL, 0, &ip6_auto_flowlabel, 0,
1774: CTL_NET, PF_INET6, IPPROTO_IPV6,
1775: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1776: sysctl_createv(clog, 0, NULL, NULL,
1777: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1778: CTLTYPE_INT, "defmcasthlim",
1779: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1780: NULL, 0, &ip6_defmcasthlim, 0,
1781: CTL_NET, PF_INET6, IPPROTO_IPV6,
1782: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1783: #if NGIF > 0
1.73 atatat 1784: sysctl_createv(clog, 0, NULL, NULL,
1785: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1786: CTLTYPE_INT, "gifhlim",
1787: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1788: NULL, 0, &ip6_gif_hlim, 0,
1789: CTL_NET, PF_INET6, IPPROTO_IPV6,
1790: IPV6CTL_GIF_HLIM, CTL_EOL);
1791: #endif /* NGIF */
1.73 atatat 1792: sysctl_createv(clog, 0, NULL, NULL,
1793: CTLFLAG_PERMANENT,
1.74 atatat 1794: CTLTYPE_STRING, "kame_version",
1795: SYSCTL_DESCR("KAME Version"),
1.78 christos 1796: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1797: CTL_NET, PF_INET6, IPPROTO_IPV6,
1798: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1799: sysctl_createv(clog, 0, NULL, NULL,
1800: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1801: CTLTYPE_INT, "use_deprecated",
1802: SYSCTL_DESCR("Allow use of deprecated addresses as "
1803: "source addresses"),
1.70 atatat 1804: NULL, 0, &ip6_use_deprecated, 0,
1805: CTL_NET, PF_INET6, IPPROTO_IPV6,
1806: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1807: sysctl_createv(clog, 0, NULL, NULL,
1808: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1809: CTLTYPE_INT, "rr_prune", NULL,
1810: NULL, 0, &ip6_rr_prune, 0,
1811: CTL_NET, PF_INET6, IPPROTO_IPV6,
1812: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1813: sysctl_createv(clog, 0, NULL, NULL,
1814: CTLFLAG_PERMANENT
1.70 atatat 1815: #ifndef INET6_BINDV6ONLY
1.73 atatat 1816: |CTLFLAG_READWRITE,
1.70 atatat 1817: #endif
1.74 atatat 1818: CTLTYPE_INT, "v6only",
1819: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1820: "to PF_INET sockets"),
1.70 atatat 1821: NULL, 0, &ip6_v6only, 0,
1822: CTL_NET, PF_INET6, IPPROTO_IPV6,
1823: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1824: sysctl_createv(clog, 0, NULL, NULL,
1825: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1826: CTLTYPE_INT, "anonportmin",
1827: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1828: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1829: CTL_NET, PF_INET6, IPPROTO_IPV6,
1830: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1831: sysctl_createv(clog, 0, NULL, NULL,
1832: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1833: CTLTYPE_INT, "anonportmax",
1834: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1835: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1836: CTL_NET, PF_INET6, IPPROTO_IPV6,
1837: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1838: #ifndef IPNOPRIVPORTS
1.73 atatat 1839: sysctl_createv(clog, 0, NULL, NULL,
1840: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1841: CTLTYPE_INT, "lowportmin",
1842: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1843: "to assign"),
1.70 atatat 1844: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1845: CTL_NET, PF_INET6, IPPROTO_IPV6,
1846: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1847: sysctl_createv(clog, 0, NULL, NULL,
1848: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1849: CTLTYPE_INT, "lowportmax",
1850: SYSCTL_DESCR("Highest privileged ephemeral port number "
1851: "to assign"),
1.70 atatat 1852: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1853: CTL_NET, PF_INET6, IPPROTO_IPV6,
1854: IPV6CTL_LOWPORTMAX, CTL_EOL);
1855: #endif /* IPNOPRIVPORTS */
1.73 atatat 1856: sysctl_createv(clog, 0, NULL, NULL,
1857: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1858: CTLTYPE_INT, "use_tempaddr",
1859: SYSCTL_DESCR("Use temporary address"),
1860: NULL, 0, &ip6_use_tempaddr, 0,
1861: CTL_NET, PF_INET6, IPPROTO_IPV6,
1862: CTL_CREATE, CTL_EOL);
1863: sysctl_createv(clog, 0, NULL, NULL,
1864: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1865: CTLTYPE_INT, "temppltime",
1866: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1867: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1868: CTL_NET, PF_INET6, IPPROTO_IPV6,
1869: CTL_CREATE, CTL_EOL);
1870: sysctl_createv(clog, 0, NULL, NULL,
1871: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1872: CTLTYPE_INT, "tempvltime",
1873: SYSCTL_DESCR("valid lifetime of a temporary address"),
1874: NULL, 0, &ip6_temp_valid_lifetime, 0,
1875: CTL_NET, PF_INET6, IPPROTO_IPV6,
1876: CTL_CREATE, CTL_EOL);
1877: sysctl_createv(clog, 0, NULL, NULL,
1878: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1879: CTLTYPE_INT, "maxfrags",
1880: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1881: NULL, 0, &ip6_maxfrags, 0,
1882: CTL_NET, PF_INET6, IPPROTO_IPV6,
1883: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1884: sysctl_createv(clog, 0, NULL, NULL,
1885: CTLFLAG_PERMANENT,
1886: CTLTYPE_STRUCT, "stats",
1887: SYSCTL_DESCR("IPv6 statistics"),
1888: NULL, 0, &ip6stat, sizeof(ip6stat),
1889: CTL_NET, PF_INET6, IPPROTO_IPV6,
1890: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1891: sysctl_createv(clog, 0, NULL, NULL,
1892: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1893: CTLTYPE_INT, "use_defaultzone",
1894: SYSCTL_DESCR("Whether to use the default scope zones"),
1895: NULL, 0, &ip6_use_defzone, 0,
1896: CTL_NET, PF_INET6, IPPROTO_IPV6,
1897: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1898: sysctl_createv(clog, 0, NULL, NULL,
1899: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1900: CTLTYPE_INT, "mcast_pmtu",
1901: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1902: NULL, 0, &ip6_mcast_pmtu, 0,
1903: CTL_NET, PF_INET6, IPPROTO_IPV6,
1904: CTL_CREATE, CTL_EOL);
1.90.2.1 bouyer 1905: sysctl_createv(clog, 0, NULL, NULL,
1906: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1907: CTLTYPE_INT, "rht0",
1908: SYSCTL_DESCR("Processing of routing header type 0 (IPv6)"),
1909: sysctl_net_inet6_ip6_rht0, 0, &ip6_rht0, 0,
1910: CTL_NET, PF_INET6, IPPROTO_IPV6,
1911: CTL_CREATE, CTL_EOL);
1.2 itojun 1912: }
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