Annotation of src/sys/netinet6/ip6_input.c, Revision 1.78.2.3
1.78.2.3! yamt 1: /* $NetBSD: ip6_input.c,v 1.78.2.2 2006/12/30 20:50:38 yamt 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>
1.78.2.3! yamt 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.78.2.2 2006/12/30 20:50:38 yamt Exp $");
1.2 itojun 66:
67: #include "opt_inet.h"
1.78.2.1 yamt 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>
1.78.2.1 yamt 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:
1.78.2.3! yamt 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:
1.78.2.1 yamt 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 *));
1.78.2.1 yamt 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;
1.78.2.1 yamt 178: scope6_init();
179: addrsel_policy_init();
1.2 itojun 180: nd6_init();
181: frag6_init();
1.78.2.1 yamt 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
1.78.2.2 yamt 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);
1.78.2.1 yamt 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;
1.78.2.1 yamt 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
1.78.2.3! yamt 240: ip6_input(struct mbuf *m)
1.2 itojun 241: {
1.9 itojun 242: struct ip6_hdr *ip6;
1.2 itojun 243: int off = sizeof(struct ip6_hdr), nest;
244: u_int32_t plen;
1.5 itojun 245: u_int32_t rtalert = ~0;
1.2 itojun 246: int nxt, ours = 0;
1.9 itojun 247: struct ifnet *deliverifp = NULL;
1.64 itojun 248: int srcrt = 0;
1.78.2.3! yamt 249: #ifdef FAST_IPSEC
! 250: struct m_tag *mtag;
! 251: struct tdb_ident *tdbi;
! 252: struct secpolicy *sp;
! 253: int s, error;
! 254: #endif
1.2 itojun 255:
256: #ifdef IPSEC
257: /*
258: * should the inner packet be considered authentic?
259: * see comment in ah4_input().
260: */
1.49 itojun 261: m->m_flags &= ~M_AUTHIPHDR;
262: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 263: #endif
1.9 itojun 264:
1.2 itojun 265: /*
1.78.2.1 yamt 266: * make sure we don't have onion peering information into m_tag.
267: */
268: ip6_delaux(m);
269:
270: /*
1.44 itojun 271: * mbuf statistics
1.2 itojun 272: */
273: if (m->m_flags & M_EXT) {
274: if (m->m_next)
275: ip6stat.ip6s_mext2m++;
276: else
277: ip6stat.ip6s_mext1++;
278: } else {
1.78.2.3! yamt 279: #define M2MMAX __arraycount(ip6stat.ip6s_m2m)
1.2 itojun 280: if (m->m_next) {
1.9 itojun 281: if (m->m_flags & M_LOOP) {
1.77 peter 282: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 283: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 284: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
285: else
286: ip6stat.ip6s_m2m[0]++;
287: } else
288: ip6stat.ip6s_m1++;
1.40 itojun 289: #undef M2MMAX
1.2 itojun 290: }
291:
1.9 itojun 292: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
293: ip6stat.ip6s_total++;
294:
1.57 thorpej 295: /*
296: * If the IPv6 header is not aligned, slurp it up into a new
297: * mbuf with space for link headers, in the event we forward
1.78.2.1 yamt 298: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 299: * IPv6 header is in the first mbuf of the chain.
300: */
301: if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
302: struct ifnet *inifp = m->m_pkthdr.rcvif;
303: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
304: (max_linkhdr + 3) & ~3)) == NULL) {
305: /* XXXJRT new stat, please */
306: ip6stat.ip6s_toosmall++;
307: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
308: return;
309: }
310: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
311: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 312: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 313: ip6stat.ip6s_toosmall++;
314: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
315: return;
316: }
1.2 itojun 317: }
318:
319: ip6 = mtod(m, struct ip6_hdr *);
320:
321: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
322: ip6stat.ip6s_badvers++;
1.9 itojun 323: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 324: goto bad;
325: }
1.15 darrenr 326:
327: #ifdef PFIL_HOOKS
328: /*
329: * Run through list of hooks for input packets. If there are any
330: * filters which require that additional packets in the flow are
331: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
332: * Note that filters must _never_ set this flag, as another filter
333: * in the list may have previously cleared it.
334: */
1.39 itojun 335: /*
336: * let ipfilter look at packet on the wire,
337: * not the decapsulated packet.
338: */
339: #ifdef IPSEC
1.42 itojun 340: if (!ipsec_getnhist(m))
1.78.2.3! yamt 341: #elif defined(FAST_IPSEC)
! 342: if (!ipsec_indone(m))
1.39 itojun 343: #else
344: if (1)
345: #endif
346: {
1.64 itojun 347: struct in6_addr odst;
348:
349: odst = ip6->ip6_dst;
1.39 itojun 350: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
351: PFIL_IN) != 0)
352: return;
353: if (m == NULL)
354: return;
355: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 356: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 357: }
1.15 darrenr 358: #endif /* PFIL_HOOKS */
359:
1.2 itojun 360: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
361:
1.30 thorpej 362: #ifdef ALTQ
363: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
364: /* packet is dropped by traffic conditioner */
365: return;
1.9 itojun 366: }
367: #endif
368:
1.2 itojun 369: /*
1.44 itojun 370: * Check against address spoofing/corruption.
1.2 itojun 371: */
372: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
373: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 374: /*
375: * XXX: "badscope" is not very suitable for a multicast source.
376: */
1.2 itojun 377: ip6stat.ip6s_badscope++;
1.9 itojun 378: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 379: goto bad;
380: }
1.13 itojun 381: /*
1.44 itojun 382: * The following check is not documented in specs. A malicious
383: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
384: * and bypass security checks (act as if it was from 127.0.0.1 by using
385: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 386: *
1.44 itojun 387: * This check chokes if we are in an SIIT cloud. As none of BSDs
388: * support IPv4-less kernel compilation, we cannot support SIIT
389: * environment at all. So, it makes more sense for us to reject any
390: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 391: * partial support for SIIT environment.
1.13 itojun 392: */
393: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
394: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
395: ip6stat.ip6s_badscope++;
396: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
397: goto bad;
398: }
1.17 itojun 399: #if 0
1.13 itojun 400: /*
1.17 itojun 401: * Reject packets with IPv4 compatible addresses (auto tunnel).
402: *
403: * The code forbids auto tunnel relay case in RFC1933 (the check is
404: * stronger than RFC1933). We may want to re-enable it if mech-xx
405: * is revised to forbid relaying case.
1.13 itojun 406: */
407: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
408: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
409: ip6stat.ip6s_badscope++;
410: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
411: goto bad;
412: }
413: #endif
1.35 itojun 414:
1.78.2.1 yamt 415: /*
416: * Disambiguate address scope zones (if there is ambiguity).
417: * We first make sure that the original source or destination address
418: * is not in our internal form for scoped addresses. Such addresses
419: * are not necessarily invalid spec-wise, but we cannot accept them due
420: * to the usage conflict.
421: * in6_setscope() then also checks and rejects the cases where src or
422: * dst are the loopback address and the receiving interface
423: * is not loopback.
424: */
425: if (__predict_false(
426: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
427: goto bad;
428: ip6 = mtod(m, struct ip6_hdr *);
429: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
430: ip6stat.ip6s_badscope++; /* XXX */
431: goto bad;
1.38 itojun 432: }
1.78.2.1 yamt 433: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
434: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
435: ip6stat.ip6s_badscope++;
436: goto bad;
1.9 itojun 437: }
438:
1.2 itojun 439: /*
440: * Multicast check
441: */
442: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
443: struct in6_multi *in6m = 0;
1.9 itojun 444:
445: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 446: /*
447: * See if we belong to the destination multicast group on the
448: * arrival interface.
449: */
450: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
451: if (in6m)
452: ours = 1;
453: else if (!ip6_mrouter) {
454: ip6stat.ip6s_notmember++;
455: ip6stat.ip6s_cantforward++;
1.9 itojun 456: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 457: goto bad;
458: }
1.9 itojun 459: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 460: goto hbhcheck;
461: }
462:
463: /*
464: * Unicast check
465: */
1.78.2.2 yamt 466: if (!IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.78.2.3! yamt 467: &((const struct sockaddr_in6 *)rtcache_getdst((const struct route *)&ip6_forward_rt))->sin6_addr))
1.78.2.2 yamt 468: rtcache_free((struct route *)&ip6_forward_rt);
469: else
470: rtcache_check((struct route *)&ip6_forward_rt);
471: if (ip6_forward_rt.ro_rt != NULL) {
472: /* XXX Revalidated route is accounted wrongly. */
1.25 itojun 473: ip6stat.ip6s_forward_cachehit++;
1.78.2.2 yamt 474: } else {
1.35 itojun 475: struct sockaddr_in6 *dst6;
476:
1.78.2.2 yamt 477: ip6stat.ip6s_forward_cachemiss++;
1.22 itojun 478:
1.78.2.3! yamt 479: dst6 = &ip6_forward_rt.ro_dst;
! 480: memset(dst6, 0, sizeof(*dst6));
1.35 itojun 481: dst6->sin6_len = sizeof(struct sockaddr_in6);
482: dst6->sin6_family = AF_INET6;
483: dst6->sin6_addr = ip6->ip6_dst;
1.2 itojun 484:
1.78.2.2 yamt 485: rtcache_init((struct route *)&ip6_forward_rt);
1.2 itojun 486: }
487:
488: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
489:
490: /*
491: * Accept the packet if the forwarding interface to the destination
492: * according to the routing table is the loopback interface,
493: * unless the associated route has a gateway.
494: * Note that this approach causes to accept a packet if there is a
495: * route to the loopback interface for the destination of the packet.
496: * But we think it's even useful in some situations, e.g. when using
497: * a special daemon which wants to intercept the packet.
498: */
1.78.2.2 yamt 499: if (ip6_forward_rt.ro_rt != NULL &&
1.2 itojun 500: (ip6_forward_rt.ro_rt->rt_flags &
501: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55 itojun 502: !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2 itojun 503: #if 0
504: /*
505: * The check below is redundant since the comparison of
506: * the destination and the key of the rtentry has
507: * already done through looking up the routing table.
508: */
509: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55 itojun 510: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2 itojun 511: #endif
1.9 itojun 512: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 513: struct in6_ifaddr *ia6 =
514: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
515: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
516: m->m_flags |= M_ANYCAST6;
1.24 itojun 517: /*
518: * packets to a tentative, duplicated, or somehow invalid
519: * address must not be accepted.
520: */
1.2 itojun 521: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 522: /* this address is ready */
1.2 itojun 523: ours = 1;
1.9 itojun 524: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 525: goto hbhcheck;
526: } else {
1.24 itojun 527: /* address is not ready, so discard the packet. */
1.34 itojun 528: nd6log((LOG_INFO,
1.27 itojun 529: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 530: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 531: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 532:
533: goto bad;
1.2 itojun 534: }
535: }
536:
537: /*
1.55 itojun 538: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 539: */
540: #if defined(NFAITH) && 0 < NFAITH
541: if (ip6_keepfaith) {
1.78.2.2 yamt 542: if (ip6_forward_rt.ro_rt != NULL &&
543: ip6_forward_rt.ro_rt->rt_ifp != NULL &&
1.71 itojun 544: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 545: /* XXX do we need more sanity checks? */
546: ours = 1;
1.45 itojun 547: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 548: goto hbhcheck;
549: }
550: }
551: #endif
552:
553: #if 0
554: {
555: /*
556: * Last resort: check in6_ifaddr for incoming interface.
557: * The code is here until I update the "goto ours hack" code above
558: * working right.
559: */
560: struct ifaddr *ifa;
1.78.2.2 yamt 561: TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) {
1.9 itojun 562: if (ifa->ifa_addr == NULL)
563: continue; /* just for safety */
564: if (ifa->ifa_addr->sa_family != AF_INET6)
565: continue;
566: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
567: ours = 1;
568: deliverifp = ifa->ifa_ifp;
1.2 itojun 569: goto hbhcheck;
570: }
571: }
1.9 itojun 572: }
1.2 itojun 573: #endif
574:
575: /*
576: * Now there is no reason to process the packet if it's not our own
577: * and we're not a router.
578: */
579: if (!ip6_forwarding) {
580: ip6stat.ip6s_cantforward++;
1.9 itojun 581: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 582: goto bad;
583: }
584:
585: hbhcheck:
586: /*
1.78.2.1 yamt 587: * record address information into m_tag, if we don't have one yet.
588: * note that we are unable to record it, if the address is not listed
589: * as our interface address (e.g. multicast addresses, addresses
590: * within FAITH prefixes and such).
591: */
592: if (deliverifp && !ip6_getdstifaddr(m)) {
593: struct in6_ifaddr *ia6;
594:
595: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
596: if (ia6) {
597: if (!ip6_setdstifaddr(m, ia6)) {
598: /*
599: * XXX maybe we should drop the packet here,
600: * as we could not provide enough information
601: * to the upper layers.
602: */
603: }
604: }
605: }
606:
607: /*
1.2 itojun 608: * Process Hop-by-Hop options header if it's contained.
609: * m may be modified in ip6_hopopts_input().
610: * If a JumboPayload option is included, plen will also be modified.
611: */
612: plen = (u_int32_t)ntohs(ip6->ip6_plen);
613: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 614: struct ip6_hbh *hbh;
615:
616: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
617: #if 0 /*touches NULL pointer*/
618: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
619: #endif
1.2 itojun 620: return; /* m have already been freed */
1.9 itojun 621: }
1.22 itojun 622:
1.2 itojun 623: /* adjust pointer */
624: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 625:
626: /*
1.49 itojun 627: * if the payload length field is 0 and the next header field
1.22 itojun 628: * indicates Hop-by-Hop Options header, then a Jumbo Payload
629: * option MUST be included.
630: */
631: if (ip6->ip6_plen == 0 && plen == 0) {
632: /*
633: * Note that if a valid jumbo payload option is
1.78.2.1 yamt 634: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 635: * (non-zero) payload length to the variable plen.
1.22 itojun 636: */
637: ip6stat.ip6s_badoptions++;
638: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
639: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
640: icmp6_error(m, ICMP6_PARAM_PROB,
641: ICMP6_PARAMPROB_HEADER,
642: (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
643: return;
644: }
1.9 itojun 645: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
646: sizeof(struct ip6_hbh));
647: if (hbh == NULL) {
648: ip6stat.ip6s_tooshort++;
649: return;
650: }
1.57 thorpej 651: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 652: nxt = hbh->ip6h_nxt;
1.2 itojun 653:
654: /*
655: * accept the packet if a router alert option is included
656: * and we act as an IPv6 router.
657: */
1.5 itojun 658: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 659: ours = 1;
660: } else
661: nxt = ip6->ip6_nxt;
662:
663: /*
664: * Check that the amount of data in the buffers
665: * is as at least much as the IPv6 header would have us expect.
666: * Trim mbufs if longer than we expect.
667: * Drop packet if shorter than we expect.
668: */
669: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
670: ip6stat.ip6s_tooshort++;
1.9 itojun 671: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 672: goto bad;
673: }
674: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
675: if (m->m_len == m->m_pkthdr.len) {
676: m->m_len = sizeof(struct ip6_hdr) + plen;
677: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
678: } else
679: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
680: }
681:
682: /*
683: * Forward if desirable.
684: */
685: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
686: /*
687: * If we are acting as a multicast router, all
688: * incoming multicast packets are passed to the
689: * kernel-level multicast forwarding function.
690: * The packet is returned (relatively) intact; if
691: * ip6_mforward() returns a non-zero value, the packet
692: * must be discarded, else it may be accepted below.
693: */
694: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
695: ip6stat.ip6s_cantforward++;
696: m_freem(m);
697: return;
698: }
699: if (!ours) {
700: m_freem(m);
701: return;
702: }
1.22 itojun 703: } else if (!ours) {
1.64 itojun 704: ip6_forward(m, srcrt);
1.2 itojun 705: return;
1.56 itojun 706: }
1.25 itojun 707:
708: ip6 = mtod(m, struct ip6_hdr *);
709:
710: /*
711: * Malicious party may be able to use IPv4 mapped addr to confuse
712: * tcp/udp stack and bypass security checks (act as if it was from
713: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
714: *
715: * For SIIT end node behavior, you may want to disable the check.
716: * However, you will become vulnerable to attacks using IPv4 mapped
717: * source.
718: */
719: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
720: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
721: ip6stat.ip6s_badscope++;
722: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
723: goto bad;
724: }
1.2 itojun 725:
726: /*
727: * Tell launch routine the next header
728: */
1.12 itojun 729: #ifdef IFA_STATS
1.28 itojun 730: if (deliverifp != NULL) {
1.9 itojun 731: struct in6_ifaddr *ia6;
732: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
733: if (ia6)
734: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
735: }
736: #endif
1.2 itojun 737: ip6stat.ip6s_delivered++;
1.9 itojun 738: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 739: nest = 0;
1.40 itojun 740:
1.2 itojun 741: while (nxt != IPPROTO_DONE) {
742: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
743: ip6stat.ip6s_toomanyhdr++;
744: goto bad;
745: }
1.8 itojun 746:
747: /*
748: * protection against faulty packet - there should be
749: * more sanity checks in header chain processing.
750: */
751: if (m->m_pkthdr.len < off) {
752: ip6stat.ip6s_tooshort++;
1.9 itojun 753: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 754: goto bad;
755: }
756:
1.37 itojun 757: #ifdef IPSEC
758: /*
759: * enforce IPsec policy checking if we are seeing last header.
760: * note that we do not visit this with protocols with pcb layer
761: * code - like udp/tcp/raw ip.
762: */
763: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
764: ipsec6_in_reject(m, NULL)) {
765: ipsec6stat.in_polvio++;
766: goto bad;
767: }
768: #endif
1.78.2.3! yamt 769: #ifdef FAST_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[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
! 776: /*
! 777: * Check if the packet has already had IPsec processing
! 778: * done. If so, then just pass it along. This tag gets
! 779: * set during AH, ESP, etc. input handling, before the
! 780: * packet is returned to the ip input queue for delivery.
! 781: */
! 782: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
! 783: s = splsoftnet();
! 784: if (mtag != NULL) {
! 785: tdbi = (struct tdb_ident *)(mtag + 1);
! 786: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
! 787: } else {
! 788: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
! 789: IP_FORWARDING, &error);
! 790: }
! 791: if (sp != NULL) {
! 792: /*
! 793: * Check security policy against packet attributes.
! 794: */
! 795: error = ipsec_in_reject(sp, m);
! 796: KEY_FREESP(&sp);
! 797: } else {
! 798: /* XXX error stat??? */
! 799: error = EINVAL;
! 800: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
! 801: goto bad;
! 802: }
! 803: splx(s);
! 804: if (error)
! 805: goto bad;
! 806: }
! 807: #endif /* FAST_IPSEC */
! 808:
1.56 itojun 809:
1.2 itojun 810: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
811: }
812: return;
813: bad:
814: m_freem(m);
815: }
816:
817: /*
1.78.2.1 yamt 818: * set/grab in6_ifaddr correspond to IPv6 destination address.
819: */
820: static struct m_tag *
821: ip6_setdstifaddr(m, ia6)
822: struct mbuf *m;
823: struct in6_ifaddr *ia6;
824: {
825: struct m_tag *mtag;
826:
827: mtag = ip6_addaux(m);
828: if (mtag)
829: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
830: return mtag; /* NULL if failed to set */
831: }
832:
833: struct in6_ifaddr *
834: ip6_getdstifaddr(m)
835: struct mbuf *m;
836: {
837: struct m_tag *mtag;
838:
839: mtag = ip6_findaux(m);
840: if (mtag)
841: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
842: else
843: return NULL;
844: }
845:
846: /*
1.2 itojun 847: * Hop-by-Hop options header processing. If a valid jumbo payload option is
848: * included, the real payload length will be stored in plenp.
849: */
850: static int
851: ip6_hopopts_input(plenp, rtalertp, mp, offp)
852: u_int32_t *plenp;
1.5 itojun 853: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 854: struct mbuf **mp;
855: int *offp;
856: {
1.35 itojun 857: struct mbuf *m = *mp;
1.2 itojun 858: int off = *offp, hbhlen;
859: struct ip6_hbh *hbh;
860:
861: /* validation of the length of the header */
1.9 itojun 862: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
863: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
864: if (hbh == NULL) {
865: ip6stat.ip6s_tooshort++;
866: return -1;
867: }
868: hbhlen = (hbh->ip6h_len + 1) << 3;
869: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
870: hbhlen);
871: if (hbh == NULL) {
872: ip6stat.ip6s_tooshort++;
873: return -1;
874: }
1.57 thorpej 875: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 876: off += hbhlen;
877: hbhlen -= sizeof(struct ip6_hbh);
878:
879: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
880: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 881: return (-1);
1.2 itojun 882:
883: *offp = off;
884: *mp = m;
1.58 itojun 885: return (0);
1.2 itojun 886: }
887:
888: /*
889: * Search header for all Hop-by-hop options and process each option.
890: * This function is separate from ip6_hopopts_input() in order to
891: * handle a case where the sending node itself process its hop-by-hop
892: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 893: *
894: * The function assumes that hbh header is located right after the IPv6 header
895: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
896: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 897: */
898: int
899: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
900: struct mbuf *m;
901: u_int8_t *opthead;
902: int hbhlen;
1.5 itojun 903: u_int32_t *rtalertp;
1.2 itojun 904: u_int32_t *plenp;
905: {
906: struct ip6_hdr *ip6;
907: int optlen = 0;
908: u_int8_t *opt = opthead;
909: u_int16_t rtalert_val;
1.22 itojun 910: u_int32_t jumboplen;
1.55 itojun 911: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 912:
913: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 914: switch (*opt) {
915: case IP6OPT_PAD1:
916: optlen = 1;
917: break;
918: case IP6OPT_PADN:
919: if (hbhlen < IP6OPT_MINLEN) {
920: ip6stat.ip6s_toosmall++;
921: goto bad;
922: }
923: optlen = *(opt + 1) + 2;
924: break;
925: case IP6OPT_RTALERT:
926: /* XXX may need check for alignment */
927: if (hbhlen < IP6OPT_RTALERT_LEN) {
928: ip6stat.ip6s_toosmall++;
929: goto bad;
930: }
931: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 932: /* XXX stat */
933: icmp6_error(m, ICMP6_PARAM_PROB,
934: ICMP6_PARAMPROB_HEADER,
935: erroff + opt + 1 - opthead);
936: return (-1);
1.35 itojun 937: }
938: optlen = IP6OPT_RTALERT_LEN;
939: bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
940: *rtalertp = ntohs(rtalert_val);
941: break;
942: case IP6OPT_JUMBO:
1.22 itojun 943: /* XXX may need check for alignment */
944: if (hbhlen < IP6OPT_JUMBO_LEN) {
945: ip6stat.ip6s_toosmall++;
946: goto bad;
947: }
1.35 itojun 948: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 949: /* XXX stat */
950: icmp6_error(m, ICMP6_PARAM_PROB,
951: ICMP6_PARAMPROB_HEADER,
952: erroff + opt + 1 - opthead);
953: return (-1);
1.35 itojun 954: }
1.22 itojun 955: optlen = IP6OPT_JUMBO_LEN;
956:
957: /*
958: * IPv6 packets that have non 0 payload length
1.35 itojun 959: * must not contain a jumbo payload option.
1.22 itojun 960: */
961: ip6 = mtod(m, struct ip6_hdr *);
962: if (ip6->ip6_plen) {
963: ip6stat.ip6s_badoptions++;
964: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 965: ICMP6_PARAMPROB_HEADER,
966: erroff + opt - opthead);
967: return (-1);
1.22 itojun 968: }
1.2 itojun 969:
1.22 itojun 970: /*
971: * We may see jumbolen in unaligned location, so
972: * we'd need to perform bcopy().
973: */
974: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
975: jumboplen = (u_int32_t)htonl(jumboplen);
976:
977: #if 1
978: /*
979: * if there are multiple jumbo payload options,
980: * *plenp will be non-zero and the packet will be
981: * rejected.
982: * the behavior may need some debate in ipngwg -
983: * multiple options does not make sense, however,
984: * there's no explicit mention in specification.
985: */
986: if (*plenp != 0) {
987: ip6stat.ip6s_badoptions++;
988: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 989: ICMP6_PARAMPROB_HEADER,
990: erroff + opt + 2 - opthead);
991: return (-1);
1.22 itojun 992: }
1.8 itojun 993: #endif
1.2 itojun 994:
1.22 itojun 995: /*
996: * jumbo payload length must be larger than 65535.
997: */
998: if (jumboplen <= IPV6_MAXPACKET) {
999: ip6stat.ip6s_badoptions++;
1000: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1001: ICMP6_PARAMPROB_HEADER,
1002: erroff + opt + 2 - opthead);
1003: return (-1);
1.22 itojun 1004: }
1005: *plenp = jumboplen;
1006:
1007: break;
1.35 itojun 1008: default: /* unknown option */
1009: if (hbhlen < IP6OPT_MINLEN) {
1010: ip6stat.ip6s_toosmall++;
1011: goto bad;
1012: }
1.55 itojun 1013: optlen = ip6_unknown_opt(opt, m,
1014: erroff + opt - opthead);
1015: if (optlen == -1)
1016: return (-1);
1.35 itojun 1017: optlen += 2;
1018: break;
1.2 itojun 1019: }
1020: }
1021:
1.55 itojun 1022: return (0);
1.2 itojun 1023:
1024: bad:
1025: m_freem(m);
1.55 itojun 1026: return (-1);
1.2 itojun 1027: }
1028:
1029: /*
1030: * Unknown option processing.
1031: * The third argument `off' is the offset from the IPv6 header to the option,
1032: * which is necessary if the IPv6 header the and option header and IPv6 header
1033: * is not continuous in order to return an ICMPv6 error.
1034: */
1035: int
1036: ip6_unknown_opt(optp, m, off)
1037: u_int8_t *optp;
1038: struct mbuf *m;
1039: int off;
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
1081: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 1082: struct in6pcb *in6p;
1083: struct mbuf **mp;
1084: struct ip6_hdr *ip6;
1085: struct mbuf *m;
1.2 itojun 1086: {
1.78.2.1 yamt 1087: #ifdef RFC2292
1088: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1089: #else
1090: #define IS2292(x, y) (y)
1091: #endif
1.9 itojun 1092:
1093: #ifdef SO_TIMESTAMP
1.2 itojun 1094: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1095: struct timeval tv;
1096:
1097: microtime(&tv);
1098: *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
1.63 itojun 1099: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1100: if (*mp)
1101: mp = &(*mp)->m_next;
1102: }
1.9 itojun 1103: #endif
1.2 itojun 1104:
1.78.2.1 yamt 1105: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1106: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1107: return;
1.2 itojun 1108:
1109: /* RFC 2292 sec. 5 */
1.35 itojun 1110: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1111: struct in6_pktinfo pi6;
1.78.2.1 yamt 1112:
1.2 itojun 1113: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.78.2.1 yamt 1114: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1115: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1116: m->m_pkthdr.rcvif->if_index : 0;
1.2 itojun 1117: *mp = sbcreatecontrol((caddr_t) &pi6,
1.78.2.1 yamt 1118: sizeof(struct in6_pktinfo),
1119: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1120: if (*mp)
1121: mp = &(*mp)->m_next;
1122: }
1.78.2.1 yamt 1123:
1.2 itojun 1124: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1125: int hlim = ip6->ip6_hlim & 0xff;
1.78.2.1 yamt 1126:
1.63 itojun 1127: *mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),
1.78.2.1 yamt 1128: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1129: if (*mp)
1130: mp = &(*mp)->m_next;
1131: }
1132:
1133: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1134: u_int32_t flowinfo;
1135: int tclass;
1136:
1137: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1138: flowinfo >>= 20;
1139:
1140: tclass = flowinfo & 0xff;
1141: *mp = sbcreatecontrol((caddr_t)&tclass, sizeof(tclass),
1142: IPV6_TCLASS, IPPROTO_IPV6);
1143:
1.2 itojun 1144: if (*mp)
1145: mp = &(*mp)->m_next;
1146: }
1147:
1148: /*
1.75 itojun 1149: * IPV6_HOPOPTS socket option. Recall that we required super-user
1150: * privilege for the option (see ip6_ctloutput), but it might be too
1151: * strict, since there might be some hop-by-hop options which can be
1152: * returned to normal user.
1.78.2.1 yamt 1153: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1154: */
1.75 itojun 1155: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1156: /*
1157: * Check if a hop-by-hop options header is contatined in the
1158: * received packet, and if so, store the options as ancillary
1159: * data. Note that a hop-by-hop options header must be
1160: * just after the IPv6 header, which fact is assured through
1161: * the IPv6 input processing.
1162: */
1.78 christos 1163: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1164: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1165: struct ip6_hbh *hbh;
1166: int hbhlen;
1.62 itojun 1167: struct mbuf *ext;
1.9 itojun 1168:
1.62 itojun 1169: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1170: xip6->ip6_nxt);
1.62 itojun 1171: if (ext == NULL) {
1.9 itojun 1172: ip6stat.ip6s_tooshort++;
1173: return;
1174: }
1.62 itojun 1175: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1176: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1177: if (hbhlen != ext->m_len) {
1178: m_freem(ext);
1.9 itojun 1179: ip6stat.ip6s_tooshort++;
1180: return;
1181: }
1.2 itojun 1182:
1183: /*
1184: * XXX: We copy whole the header even if a jumbo
1185: * payload option is included, which option is to
1186: * be removed before returning in the RFC 2292.
1.78.2.1 yamt 1187: * Note: this constraint is removed in RFC3542.
1.2 itojun 1188: */
1.9 itojun 1189: *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
1.78.2.1 yamt 1190: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1191: IPPROTO_IPV6);
1.2 itojun 1192: if (*mp)
1193: mp = &(*mp)->m_next;
1.62 itojun 1194: m_freem(ext);
1.2 itojun 1195: }
1196: }
1197:
1198: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1199: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1200: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1201: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1202:
1203: /*
1204: * Search for destination options headers or routing
1205: * header(s) through the header chain, and stores each
1206: * header as ancillary data.
1207: * Note that the order of the headers remains in
1208: * the chain of ancillary data.
1209: */
1.78.2.1 yamt 1210: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1211: struct ip6_ext *ip6e = NULL;
1.9 itojun 1212: int elen;
1.62 itojun 1213: struct mbuf *ext = NULL;
1.9 itojun 1214:
1.62 itojun 1215: /*
1216: * if it is not an extension header, don't try to
1217: * pull it from the chain.
1218: */
1219: switch (nxt) {
1220: case IPPROTO_DSTOPTS:
1221: case IPPROTO_ROUTING:
1222: case IPPROTO_HOPOPTS:
1223: case IPPROTO_AH: /* is it possible? */
1224: break;
1225: default:
1226: goto loopend;
1227: }
1228:
1229: ext = ip6_pullexthdr(m, off, nxt);
1230: if (ext == NULL) {
1.9 itojun 1231: ip6stat.ip6s_tooshort++;
1232: return;
1233: }
1.62 itojun 1234: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1235: if (nxt == IPPROTO_AH)
1236: elen = (ip6e->ip6e_len + 2) << 2;
1237: else
1238: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1239: if (elen != ext->m_len) {
1240: m_freem(ext);
1.9 itojun 1241: ip6stat.ip6s_tooshort++;
1242: return;
1243: }
1.57 thorpej 1244: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1245:
1.35 itojun 1246: switch (nxt) {
1.62 itojun 1247: case IPPROTO_DSTOPTS:
1.35 itojun 1248: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1249: break;
1250:
1251: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.78.2.1 yamt 1252: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1253: IPPROTO_IPV6);
1.35 itojun 1254: if (*mp)
1255: mp = &(*mp)->m_next;
1256: break;
1257:
1258: case IPPROTO_ROUTING:
1259: if (!in6p->in6p_flags & IN6P_RTHDR)
1260: break;
1261:
1262: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.78.2.1 yamt 1263: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1264: IPPROTO_IPV6);
1.35 itojun 1265: if (*mp)
1266: mp = &(*mp)->m_next;
1267: break;
1268:
1.62 itojun 1269: case IPPROTO_HOPOPTS:
1270: case IPPROTO_AH: /* is it possible? */
1271: break;
1272:
1.35 itojun 1273: default:
1274: /*
1.62 itojun 1275: * other cases have been filtered in the above.
1276: * none will visit this case. here we supply
1277: * the code just in case (nxt overwritten or
1278: * other cases).
1.35 itojun 1279: */
1.62 itojun 1280: m_freem(ext);
1.35 itojun 1281: goto loopend;
1282:
1.2 itojun 1283: }
1284:
1285: /* proceed with the next header. */
1.9 itojun 1286: off += elen;
1.2 itojun 1287: nxt = ip6e->ip6e_nxt;
1.62 itojun 1288: ip6e = NULL;
1289: m_freem(ext);
1290: ext = NULL;
1.2 itojun 1291: }
1292: loopend:
1.62 itojun 1293: ;
1.2 itojun 1294: }
1.62 itojun 1295: }
1.78.2.1 yamt 1296: #undef IS2292
1297:
1298:
1299: void
1.78.2.3! yamt 1300: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
! 1301: uint32_t *mtu)
1.78.2.1 yamt 1302: {
1303: struct socket *so;
1304: struct mbuf *m_mtu;
1305: struct ip6_mtuinfo mtuctl;
1306:
1307: so = in6p->in6p_socket;
1308:
1309: if (mtu == NULL)
1310: return;
1311:
1312: #ifdef DIAGNOSTIC
1313: if (so == NULL) /* I believe this is impossible */
1314: panic("ip6_notify_pmtu: socket is NULL");
1315: #endif
1316:
1317: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1318: mtuctl.ip6m_mtu = *mtu;
1319: mtuctl.ip6m_addr = *dst;
1320: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1321: return;
1322:
1323: if ((m_mtu = sbcreatecontrol((caddr_t)&mtuctl, sizeof(mtuctl),
1324: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1325: return;
1326:
1.78.2.3! yamt 1327: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.78.2.1 yamt 1328: == 0) {
1329: m_freem(m_mtu);
1330: /* XXX: should count statistics */
1331: } else
1332: sorwakeup(so);
1333:
1334: return;
1335: }
1.62 itojun 1336:
1337: /*
1338: * pull single extension header from mbuf chain. returns single mbuf that
1339: * contains the result, or NULL on error.
1340: */
1341: static struct mbuf *
1342: ip6_pullexthdr(m, off, nxt)
1343: struct mbuf *m;
1344: size_t off;
1345: int nxt;
1346: {
1347: struct ip6_ext ip6e;
1348: size_t elen;
1349: struct mbuf *n;
1350:
1351: #ifdef DIAGNOSTIC
1352: switch (nxt) {
1353: case IPPROTO_DSTOPTS:
1354: case IPPROTO_ROUTING:
1355: case IPPROTO_HOPOPTS:
1356: case IPPROTO_AH: /* is it possible? */
1357: break;
1358: default:
1359: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1360: }
1.62 itojun 1361: #endif
1.2 itojun 1362:
1.62 itojun 1363: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1364: if (nxt == IPPROTO_AH)
1365: elen = (ip6e.ip6e_len + 2) << 2;
1366: else
1367: elen = (ip6e.ip6e_len + 1) << 3;
1368:
1369: MGET(n, M_DONTWAIT, MT_DATA);
1370: if (n && elen >= MLEN) {
1371: MCLGET(n, M_DONTWAIT);
1372: if ((n->m_flags & M_EXT) == 0) {
1373: m_free(n);
1374: n = NULL;
1375: }
1376: }
1377: if (!n)
1378: return NULL;
1379:
1380: n->m_len = 0;
1381: if (elen >= M_TRAILINGSPACE(n)) {
1382: m_free(n);
1383: return NULL;
1384: }
1385:
1386: m_copydata(m, off, elen, mtod(n, caddr_t));
1387: n->m_len = elen;
1388: return n;
1.2 itojun 1389: }
1390:
1391: /*
1392: * Get pointer to the previous header followed by the header
1393: * currently processed.
1394: * XXX: This function supposes that
1395: * M includes all headers,
1396: * the next header field and the header length field of each header
1397: * are valid, and
1398: * the sum of each header length equals to OFF.
1399: * Because of these assumptions, this function must be called very
1400: * carefully. Moreover, it will not be used in the near future when
1401: * we develop `neater' mechanism to process extension headers.
1402: */
1.58 itojun 1403: u_int8_t *
1.2 itojun 1404: ip6_get_prevhdr(m, off)
1405: struct mbuf *m;
1406: int off;
1407: {
1408: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1409:
1410: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1411: return (&ip6->ip6_nxt);
1.2 itojun 1412: else {
1413: int len, nxt;
1414: struct ip6_ext *ip6e = NULL;
1415:
1416: nxt = ip6->ip6_nxt;
1417: len = sizeof(struct ip6_hdr);
1418: while (len < off) {
1419: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
1420:
1.35 itojun 1421: switch (nxt) {
1.2 itojun 1422: case IPPROTO_FRAGMENT:
1423: len += sizeof(struct ip6_frag);
1424: break;
1425: case IPPROTO_AH:
1426: len += (ip6e->ip6e_len + 2) << 2;
1427: break;
1428: default:
1429: len += (ip6e->ip6e_len + 1) << 3;
1430: break;
1431: }
1432: nxt = ip6e->ip6e_nxt;
1433: }
1434: if (ip6e)
1.58 itojun 1435: return (&ip6e->ip6e_nxt);
1.2 itojun 1436: else
1437: return NULL;
1.18 itojun 1438: }
1439: }
1440:
1441: /*
1442: * get next header offset. m will be retained.
1443: */
1444: int
1445: ip6_nexthdr(m, off, proto, nxtp)
1446: struct mbuf *m;
1447: int off;
1448: int proto;
1449: int *nxtp;
1450: {
1451: struct ip6_hdr ip6;
1452: struct ip6_ext ip6e;
1453: struct ip6_frag fh;
1454:
1455: /* just in case */
1456: if (m == NULL)
1457: panic("ip6_nexthdr: m == NULL");
1458: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1459: return -1;
1460:
1461: switch (proto) {
1462: case IPPROTO_IPV6:
1.78.2.1 yamt 1463: /* do not chase beyond intermediate IPv6 headers */
1464: if (off != 0)
1465: return -1;
1.18 itojun 1466: if (m->m_pkthdr.len < off + sizeof(ip6))
1467: return -1;
1468: m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
1469: if (nxtp)
1470: *nxtp = ip6.ip6_nxt;
1471: off += sizeof(ip6);
1472: return off;
1473:
1474: case IPPROTO_FRAGMENT:
1475: /*
1476: * terminate parsing if it is not the first fragment,
1477: * it does not make sense to parse through it.
1478: */
1479: if (m->m_pkthdr.len < off + sizeof(fh))
1480: return -1;
1481: m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
1.67 itojun 1482: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1483: return -1;
1484: if (nxtp)
1485: *nxtp = fh.ip6f_nxt;
1486: off += sizeof(struct ip6_frag);
1487: return off;
1488:
1489: case IPPROTO_AH:
1490: if (m->m_pkthdr.len < off + sizeof(ip6e))
1491: return -1;
1492: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1493: if (nxtp)
1494: *nxtp = ip6e.ip6e_nxt;
1495: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1496: if (m->m_pkthdr.len < off)
1497: return -1;
1.18 itojun 1498: return off;
1499:
1500: case IPPROTO_HOPOPTS:
1501: case IPPROTO_ROUTING:
1502: case IPPROTO_DSTOPTS:
1503: if (m->m_pkthdr.len < off + sizeof(ip6e))
1504: return -1;
1505: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1506: if (nxtp)
1507: *nxtp = ip6e.ip6e_nxt;
1508: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1509: if (m->m_pkthdr.len < off)
1510: return -1;
1.18 itojun 1511: return off;
1512:
1513: case IPPROTO_NONE:
1514: case IPPROTO_ESP:
1515: case IPPROTO_IPCOMP:
1516: /* give up */
1517: return -1;
1518:
1519: default:
1520: return -1;
1521: }
1522: }
1523:
1524: /*
1525: * get offset for the last header in the chain. m will be kept untainted.
1526: */
1527: int
1528: ip6_lasthdr(m, off, proto, nxtp)
1529: struct mbuf *m;
1530: int off;
1531: int proto;
1532: int *nxtp;
1533: {
1534: int newoff;
1535: int nxt;
1536:
1537: if (!nxtp) {
1538: nxt = -1;
1539: nxtp = &nxt;
1540: }
1.78.2.1 yamt 1541: for (;;) {
1.18 itojun 1542: newoff = ip6_nexthdr(m, off, proto, nxtp);
1543: if (newoff < 0)
1544: return off;
1545: else if (newoff < off)
1546: return -1; /* invalid */
1547: else if (newoff == off)
1548: return newoff;
1549:
1550: off = newoff;
1551: proto = *nxtp;
1.2 itojun 1552: }
1553: }
1554:
1.78.2.1 yamt 1555: struct m_tag *
1556: ip6_addaux(m)
1557: struct mbuf *m;
1558: {
1559: struct m_tag *mtag;
1560:
1561: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1562: if (!mtag) {
1563: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1564: M_NOWAIT);
1565: if (mtag) {
1566: m_tag_prepend(m, mtag);
1567: bzero(mtag + 1, sizeof(struct ip6aux));
1568: }
1569: }
1570: return mtag;
1571: }
1572:
1573: struct m_tag *
1574: ip6_findaux(m)
1575: struct mbuf *m;
1576: {
1577: struct m_tag *mtag;
1578:
1579: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1580: return mtag;
1581: }
1582:
1583: void
1584: ip6_delaux(m)
1585: struct mbuf *m;
1586: {
1587: struct m_tag *mtag;
1588:
1589: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1590: if (mtag)
1591: m_tag_delete(m, mtag);
1592: }
1593:
1.2 itojun 1594: /*
1595: * System control for IP6
1596: */
1597:
1598: u_char inet6ctlerrmap[PRC_NCMDS] = {
1599: 0, 0, 0, 0,
1600: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1601: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1602: EMSGSIZE, EHOSTUNREACH, 0, 0,
1603: 0, 0, 0, 0,
1604: ENOPROTOOPT
1605: };
1606:
1.70 atatat 1607: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1608: {
1.78.2.1 yamt 1609: #ifdef RFC2292
1610: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1611: #else
1612: #define IS2292(x, y) (y)
1613: #endif
1.26 itojun 1614:
1.73 atatat 1615: sysctl_createv(clog, 0, NULL, NULL,
1616: CTLFLAG_PERMANENT,
1.70 atatat 1617: CTLTYPE_NODE, "net", NULL,
1618: NULL, 0, NULL, 0,
1619: CTL_NET, CTL_EOL);
1.73 atatat 1620: sysctl_createv(clog, 0, NULL, NULL,
1621: CTLFLAG_PERMANENT,
1.74 atatat 1622: CTLTYPE_NODE, "inet6",
1623: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1624: NULL, 0, NULL, 0,
1625: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1626: sysctl_createv(clog, 0, NULL, NULL,
1627: CTLFLAG_PERMANENT,
1.74 atatat 1628: CTLTYPE_NODE, "ip6",
1629: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1630: NULL, 0, NULL, 0,
1631: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1632:
1.73 atatat 1633: sysctl_createv(clog, 0, NULL, NULL,
1634: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1635: CTLTYPE_INT, "forwarding",
1636: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1637: NULL, 0, &ip6_forwarding, 0,
1638: CTL_NET, PF_INET6, IPPROTO_IPV6,
1639: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1640: sysctl_createv(clog, 0, NULL, NULL,
1641: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1642: CTLTYPE_INT, "redirect",
1643: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1644: NULL, 0, &ip6_sendredirects, 0,
1645: CTL_NET, PF_INET6, IPPROTO_IPV6,
1646: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1647: sysctl_createv(clog, 0, NULL, NULL,
1648: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1649: CTLTYPE_INT, "hlim",
1650: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1651: NULL, 0, &ip6_defhlim, 0,
1652: CTL_NET, PF_INET6, IPPROTO_IPV6,
1653: IPV6CTL_DEFHLIM, CTL_EOL);
1654: #ifdef notyet
1.73 atatat 1655: sysctl_createv(clog, 0, NULL, NULL,
1656: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1657: CTLTYPE_INT, "mtu", NULL,
1658: NULL, 0, &, 0,
1659: CTL_NET, PF_INET6, IPPROTO_IPV6,
1660: IPV6CTL_DEFMTU, CTL_EOL);
1661: #endif
1662: #ifdef __no_idea__
1.73 atatat 1663: sysctl_createv(clog, 0, NULL, NULL,
1664: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1665: CTLTYPE_INT, "forwsrcrt", NULL,
1666: NULL, 0, &?, 0,
1667: CTL_NET, PF_INET6, IPPROTO_IPV6,
1668: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1669: sysctl_createv(clog, 0, NULL, NULL,
1670: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1671: CTLTYPE_STRUCT, "mrtstats", NULL,
1672: NULL, 0, &?, sizeof(?),
1673: CTL_NET, PF_INET6, IPPROTO_IPV6,
1674: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1675: sysctl_createv(clog, 0, NULL, NULL,
1676: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1677: CTLTYPE_?, "mrtproto", NULL,
1678: NULL, 0, &?, sizeof(?),
1679: CTL_NET, PF_INET6, IPPROTO_IPV6,
1680: IPV6CTL_MRTPROTO, CTL_EOL);
1681: #endif
1.73 atatat 1682: sysctl_createv(clog, 0, NULL, NULL,
1683: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1684: CTLTYPE_INT, "maxfragpackets",
1685: SYSCTL_DESCR("Maximum number of fragments to buffer "
1686: "for reassembly"),
1.70 atatat 1687: NULL, 0, &ip6_maxfragpackets, 0,
1688: CTL_NET, PF_INET6, IPPROTO_IPV6,
1689: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
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, "sourcecheck", NULL,
1694: NULL, 0, &?, 0,
1695: CTL_NET, PF_INET6, IPPROTO_IPV6,
1696: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1697: sysctl_createv(clog, 0, NULL, NULL,
1698: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1699: CTLTYPE_INT, "sourcecheck_logint", NULL,
1700: NULL, 0, &?, 0,
1701: CTL_NET, PF_INET6, IPPROTO_IPV6,
1702: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1703: #endif
1.73 atatat 1704: sysctl_createv(clog, 0, NULL, NULL,
1705: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1706: CTLTYPE_INT, "accept_rtadv",
1707: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1708: NULL, 0, &ip6_accept_rtadv, 0,
1709: CTL_NET, PF_INET6, IPPROTO_IPV6,
1710: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1711: sysctl_createv(clog, 0, NULL, NULL,
1712: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1713: CTLTYPE_INT, "keepfaith",
1714: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1715: NULL, 0, &ip6_keepfaith, 0,
1716: CTL_NET, PF_INET6, IPPROTO_IPV6,
1717: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1718: sysctl_createv(clog, 0, NULL, NULL,
1719: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1720: CTLTYPE_INT, "log_interval",
1721: SYSCTL_DESCR("Minumum interval between logging "
1722: "unroutable packets"),
1.70 atatat 1723: NULL, 0, &ip6_log_interval, 0,
1724: CTL_NET, PF_INET6, IPPROTO_IPV6,
1725: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1726: sysctl_createv(clog, 0, NULL, NULL,
1727: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1728: CTLTYPE_INT, "hdrnestlimit",
1729: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1730: NULL, 0, &ip6_hdrnestlimit, 0,
1731: CTL_NET, PF_INET6, IPPROTO_IPV6,
1732: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1733: sysctl_createv(clog, 0, NULL, NULL,
1734: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1735: CTLTYPE_INT, "dad_count",
1736: SYSCTL_DESCR("Number of Duplicate Address Detection "
1737: "probes to send"),
1.70 atatat 1738: NULL, 0, &ip6_dad_count, 0,
1739: CTL_NET, PF_INET6, IPPROTO_IPV6,
1740: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1741: sysctl_createv(clog, 0, NULL, NULL,
1742: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1743: CTLTYPE_INT, "auto_flowlabel",
1744: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1745: NULL, 0, &ip6_auto_flowlabel, 0,
1746: CTL_NET, PF_INET6, IPPROTO_IPV6,
1747: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1748: sysctl_createv(clog, 0, NULL, NULL,
1749: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1750: CTLTYPE_INT, "defmcasthlim",
1751: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1752: NULL, 0, &ip6_defmcasthlim, 0,
1753: CTL_NET, PF_INET6, IPPROTO_IPV6,
1754: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1755: #if NGIF > 0
1.73 atatat 1756: sysctl_createv(clog, 0, NULL, NULL,
1757: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1758: CTLTYPE_INT, "gifhlim",
1759: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1760: NULL, 0, &ip6_gif_hlim, 0,
1761: CTL_NET, PF_INET6, IPPROTO_IPV6,
1762: IPV6CTL_GIF_HLIM, CTL_EOL);
1763: #endif /* NGIF */
1.73 atatat 1764: sysctl_createv(clog, 0, NULL, NULL,
1765: CTLFLAG_PERMANENT,
1.74 atatat 1766: CTLTYPE_STRING, "kame_version",
1767: SYSCTL_DESCR("KAME Version"),
1.78 christos 1768: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1769: CTL_NET, PF_INET6, IPPROTO_IPV6,
1770: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1771: sysctl_createv(clog, 0, NULL, NULL,
1772: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1773: CTLTYPE_INT, "use_deprecated",
1774: SYSCTL_DESCR("Allow use of deprecated addresses as "
1775: "source addresses"),
1.70 atatat 1776: NULL, 0, &ip6_use_deprecated, 0,
1777: CTL_NET, PF_INET6, IPPROTO_IPV6,
1778: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1779: sysctl_createv(clog, 0, NULL, NULL,
1780: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1781: CTLTYPE_INT, "rr_prune", NULL,
1782: NULL, 0, &ip6_rr_prune, 0,
1783: CTL_NET, PF_INET6, IPPROTO_IPV6,
1784: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1785: sysctl_createv(clog, 0, NULL, NULL,
1786: CTLFLAG_PERMANENT
1.70 atatat 1787: #ifndef INET6_BINDV6ONLY
1.73 atatat 1788: |CTLFLAG_READWRITE,
1.70 atatat 1789: #endif
1.74 atatat 1790: CTLTYPE_INT, "v6only",
1791: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1792: "to PF_INET sockets"),
1.70 atatat 1793: NULL, 0, &ip6_v6only, 0,
1794: CTL_NET, PF_INET6, IPPROTO_IPV6,
1795: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1796: sysctl_createv(clog, 0, NULL, NULL,
1797: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1798: CTLTYPE_INT, "anonportmin",
1799: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1800: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1801: CTL_NET, PF_INET6, IPPROTO_IPV6,
1802: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1803: sysctl_createv(clog, 0, NULL, NULL,
1804: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1805: CTLTYPE_INT, "anonportmax",
1806: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1807: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1808: CTL_NET, PF_INET6, IPPROTO_IPV6,
1809: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1810: #ifndef IPNOPRIVPORTS
1.73 atatat 1811: sysctl_createv(clog, 0, NULL, NULL,
1812: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1813: CTLTYPE_INT, "lowportmin",
1814: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1815: "to assign"),
1.70 atatat 1816: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1817: CTL_NET, PF_INET6, IPPROTO_IPV6,
1818: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1819: sysctl_createv(clog, 0, NULL, NULL,
1820: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1821: CTLTYPE_INT, "lowportmax",
1822: SYSCTL_DESCR("Highest privileged ephemeral port number "
1823: "to assign"),
1.70 atatat 1824: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1825: CTL_NET, PF_INET6, IPPROTO_IPV6,
1826: IPV6CTL_LOWPORTMAX, CTL_EOL);
1827: #endif /* IPNOPRIVPORTS */
1.73 atatat 1828: sysctl_createv(clog, 0, NULL, NULL,
1829: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.78.2.1 yamt 1830: CTLTYPE_INT, "use_tempaddr",
1831: SYSCTL_DESCR("Use temporary address"),
1832: NULL, 0, &ip6_use_tempaddr, 0,
1833: CTL_NET, PF_INET6, IPPROTO_IPV6,
1834: CTL_CREATE, CTL_EOL);
1835: sysctl_createv(clog, 0, NULL, NULL,
1836: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1837: CTLTYPE_INT, "temppltime",
1838: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1839: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1840: CTL_NET, PF_INET6, IPPROTO_IPV6,
1841: CTL_CREATE, CTL_EOL);
1842: sysctl_createv(clog, 0, NULL, NULL,
1843: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1844: CTLTYPE_INT, "tempvltime",
1845: SYSCTL_DESCR("valid lifetime of a temporary address"),
1846: NULL, 0, &ip6_temp_valid_lifetime, 0,
1847: CTL_NET, PF_INET6, IPPROTO_IPV6,
1848: CTL_CREATE, CTL_EOL);
1849: sysctl_createv(clog, 0, NULL, NULL,
1850: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1851: CTLTYPE_INT, "maxfrags",
1852: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1853: NULL, 0, &ip6_maxfrags, 0,
1854: CTL_NET, PF_INET6, IPPROTO_IPV6,
1855: IPV6CTL_MAXFRAGS, CTL_EOL);
1.78.2.1 yamt 1856: sysctl_createv(clog, 0, NULL, NULL,
1857: CTLFLAG_PERMANENT,
1858: CTLTYPE_STRUCT, "stats",
1859: SYSCTL_DESCR("IPv6 statistics"),
1860: NULL, 0, &ip6stat, sizeof(ip6stat),
1861: CTL_NET, PF_INET6, IPPROTO_IPV6,
1862: IPV6CTL_STATS, CTL_EOL);
1863: sysctl_createv(clog, 0, NULL, NULL,
1864: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1865: CTLTYPE_INT, "use_defaultzone",
1866: SYSCTL_DESCR("Whether to use the default scope zones"),
1867: NULL, 0, &ip6_use_defzone, 0,
1868: CTL_NET, PF_INET6, IPPROTO_IPV6,
1869: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1870: sysctl_createv(clog, 0, NULL, NULL,
1871: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1872: CTLTYPE_INT, "mcast_pmtu",
1873: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1874: NULL, 0, &ip6_mcast_pmtu, 0,
1875: CTL_NET, PF_INET6, IPPROTO_IPV6,
1876: CTL_CREATE, CTL_EOL);
1.2 itojun 1877: }
CVSweb <webmaster@jp.NetBSD.org>