Annotation of src/sys/netinet6/ip6_input.c, Revision 1.94.2.4
1.94.2.4! yamt 1: /* $NetBSD: ip6_input.c,v 1.94.2.3 2007/03/24 14:56:12 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>
1.94.2.4! yamt 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.94.2.3 2007/03/24 14:56:12 yamt Exp $");
1.2 itojun 66:
67: #include "opt_inet.h"
1.85 rpaulo 68: #include "opt_inet6.h"
1.4 thorpej 69: #include "opt_ipsec.h"
1.15 darrenr 70: #include "opt_pfil_hooks.h"
1.2 itojun 71:
72: #include <sys/param.h>
73: #include <sys/systm.h>
74: #include <sys/malloc.h>
75: #include <sys/mbuf.h>
76: #include <sys/domain.h>
77: #include <sys/protosw.h>
78: #include <sys/socket.h>
79: #include <sys/socketvar.h>
80: #include <sys/errno.h>
81: #include <sys/time.h>
82: #include <sys/kernel.h>
83: #include <sys/syslog.h>
84: #include <sys/proc.h>
1.46 simonb 85: #include <sys/sysctl.h>
1.2 itojun 86:
87: #include <net/if.h>
88: #include <net/if_types.h>
89: #include <net/if_dl.h>
90: #include <net/route.h>
91: #include <net/netisr.h>
1.15 darrenr 92: #ifdef PFIL_HOOKS
93: #include <net/pfil.h>
94: #endif
1.2 itojun 95:
96: #include <netinet/in.h>
1.9 itojun 97: #include <netinet/in_systm.h>
98: #ifdef INET
99: #include <netinet/ip.h>
100: #include <netinet/ip_icmp.h>
1.45 itojun 101: #endif /* INET */
1.14 itojun 102: #include <netinet/ip6.h>
1.2 itojun 103: #include <netinet6/in6_var.h>
1.11 itojun 104: #include <netinet6/ip6_var.h>
1.2 itojun 105: #include <netinet6/in6_pcb.h>
1.14 itojun 106: #include <netinet/icmp6.h>
1.81 rpaulo 107: #include <netinet6/scope6_var.h>
1.2 itojun 108: #include <netinet6/in6_ifattach.h>
109: #include <netinet6/nd6.h>
110:
1.37 itojun 111: #ifdef IPSEC
112: #include <netinet6/ipsec.h>
113: #endif
114:
1.94 degroote 115: #ifdef FAST_IPSEC
116: #include <netipsec/ipsec.h>
117: #include <netipsec/ipsec6.h>
118: #include <netipsec/key.h>
119: #endif /* FAST_IPSEC */
120:
1.2 itojun 121: #include <netinet6/ip6protosw.h>
122:
123: #include "faith.h"
124: #include "gif.h"
1.50 itojun 125:
126: #if NGIF > 0
127: #include <netinet6/in6_gif.h>
128: #endif
1.2 itojun 129:
1.9 itojun 130: #include <net/net_osdep.h>
131:
1.2 itojun 132: extern struct domain inet6domain;
133:
134: u_char ip6_protox[IPPROTO_MAX];
135: static int ip6qmaxlen = IFQ_MAXLEN;
136: struct in6_ifaddr *in6_ifaddr;
137: struct ifqueue ip6intrq;
138:
1.83 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);
1.94.2.2 rmind 185: #ifdef GATEWAY
1.94.2.3 yamt 186: ip6flow_init(ip6_hashsize);
1.94.2.2 rmind 187: #endif
1.29 thorpej 188:
189: #ifdef PFIL_HOOKS
190: /* Register our Packet Filter hook. */
1.33 thorpej 191: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
192: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 193: i = pfil_head_register(&inet6_pfil_hook);
194: if (i != 0)
195: printf("ip6_init: WARNING: unable to register pfil hook, "
196: "error %d\n", i);
197: #endif /* PFIL_HOOKS */
1.2 itojun 198: }
199:
200: static void
1.90 christos 201: ip6_init2(void *dummy)
1.2 itojun 202: {
203:
204: /* nd6_timer_init */
1.19 thorpej 205: callout_init(&nd6_timer_ch);
206: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83 rpaulo 207:
208: /* timer for regeneranation of temporary addresses randomize ID */
209: callout_init(&in6_tmpaddrtimer_ch);
210: callout_reset(&in6_tmpaddrtimer_ch,
211: (ip6_temp_preferred_lifetime - ip6_desync_factor -
212: ip6_temp_regen_advance) * hz,
213: in6_tmpaddrtimer, NULL);
1.2 itojun 214: }
215:
216: /*
217: * IP6 input interrupt handling. Just pass the packet to ip6_input.
218: */
219: void
220: ip6intr()
221: {
222: int s;
223: struct mbuf *m;
224:
225: for (;;) {
1.41 thorpej 226: s = splnet();
1.2 itojun 227: IF_DEQUEUE(&ip6intrq, m);
228: splx(s);
229: if (m == 0)
230: return;
1.83 rpaulo 231: /* drop the packet if IPv6 operation is disabled on the IF */
232: if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {
233: m_freem(m);
234: return;
235: }
1.2 itojun 236: ip6_input(m);
237: }
238: }
239:
1.94.2.4! yamt 240: extern struct route ip6_forward_rt;
1.2 itojun 241:
242: void
1.94.2.1 yamt 243: ip6_input(struct mbuf *m)
1.2 itojun 244: {
1.9 itojun 245: struct ip6_hdr *ip6;
1.94.2.4! yamt 246: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 247: u_int32_t plen;
1.5 itojun 248: u_int32_t rtalert = ~0;
1.94.2.4! yamt 249: int nxt, ours = 0, rh_present = 0;
1.9 itojun 250: struct ifnet *deliverifp = NULL;
1.64 itojun 251: int srcrt = 0;
1.94.2.4! yamt 252: const struct rtentry *rt;
! 253: union {
! 254: struct sockaddr dst;
! 255: struct sockaddr_in6 dst6;
! 256: } u;
1.94 degroote 257: #ifdef FAST_IPSEC
258: struct m_tag *mtag;
259: struct tdb_ident *tdbi;
260: struct secpolicy *sp;
261: int s, error;
262: #endif
1.2 itojun 263:
264: #ifdef IPSEC
265: /*
266: * should the inner packet be considered authentic?
267: * see comment in ah4_input().
268: */
1.49 itojun 269: m->m_flags &= ~M_AUTHIPHDR;
270: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 271: #endif
1.9 itojun 272:
1.2 itojun 273: /*
1.81 rpaulo 274: * make sure we don't have onion peering information into m_tag.
275: */
276: ip6_delaux(m);
277:
278: /*
1.44 itojun 279: * mbuf statistics
1.2 itojun 280: */
281: if (m->m_flags & M_EXT) {
282: if (m->m_next)
283: ip6stat.ip6s_mext2m++;
284: else
285: ip6stat.ip6s_mext1++;
286: } else {
1.94.2.1 yamt 287: #define M2MMAX __arraycount(ip6stat.ip6s_m2m)
1.2 itojun 288: if (m->m_next) {
1.9 itojun 289: if (m->m_flags & M_LOOP) {
1.77 peter 290: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 291: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 292: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
293: else
294: ip6stat.ip6s_m2m[0]++;
295: } else
296: ip6stat.ip6s_m1++;
1.40 itojun 297: #undef M2MMAX
1.2 itojun 298: }
299:
1.9 itojun 300: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
301: ip6stat.ip6s_total++;
302:
1.57 thorpej 303: /*
304: * If the IPv6 header is not aligned, slurp it up into a new
305: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 306: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 307: * IPv6 header is in the first mbuf of the chain.
308: */
1.94.2.2 rmind 309: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 310: struct ifnet *inifp = m->m_pkthdr.rcvif;
311: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
312: (max_linkhdr + 3) & ~3)) == NULL) {
313: /* XXXJRT new stat, please */
314: ip6stat.ip6s_toosmall++;
315: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
316: return;
317: }
318: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
319: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 320: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 321: ip6stat.ip6s_toosmall++;
322: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
323: return;
324: }
1.2 itojun 325: }
326:
327: ip6 = mtod(m, struct ip6_hdr *);
328:
329: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
330: ip6stat.ip6s_badvers++;
1.9 itojun 331: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 332: goto bad;
333: }
1.15 darrenr 334:
1.94.2.2 rmind 335: #if defined(IPSEC)
336: /* IPv6 fast forwarding is not compatible with IPsec. */
337: m->m_flags &= ~M_CANFASTFWD;
338: #else
339: /*
340: * Assume that we can create a fast-forward IP flow entry
341: * based on this packet.
342: */
343: m->m_flags |= M_CANFASTFWD;
344: #endif
345:
1.15 darrenr 346: #ifdef PFIL_HOOKS
347: /*
348: * Run through list of hooks for input packets. If there are any
349: * filters which require that additional packets in the flow are
350: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
351: * Note that filters must _never_ set this flag, as another filter
352: * in the list may have previously cleared it.
353: */
1.39 itojun 354: /*
355: * let ipfilter look at packet on the wire,
356: * not the decapsulated packet.
357: */
358: #ifdef IPSEC
1.42 itojun 359: if (!ipsec_getnhist(m))
1.94 degroote 360: #elif defined(FAST_IPSEC)
361: if (!ipsec_indone(m))
1.39 itojun 362: #else
363: if (1)
364: #endif
365: {
1.64 itojun 366: struct in6_addr odst;
367:
368: odst = ip6->ip6_dst;
1.39 itojun 369: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
370: PFIL_IN) != 0)
371: return;
372: if (m == NULL)
373: return;
374: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 375: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 376: }
1.15 darrenr 377: #endif /* PFIL_HOOKS */
378:
1.2 itojun 379: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
380:
1.30 thorpej 381: #ifdef ALTQ
382: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
383: /* packet is dropped by traffic conditioner */
384: return;
1.9 itojun 385: }
386: #endif
387:
1.2 itojun 388: /*
1.44 itojun 389: * Check against address spoofing/corruption.
1.2 itojun 390: */
391: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
392: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 393: /*
394: * XXX: "badscope" is not very suitable for a multicast source.
395: */
1.2 itojun 396: ip6stat.ip6s_badscope++;
1.9 itojun 397: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 398: goto bad;
399: }
1.13 itojun 400: /*
1.44 itojun 401: * The following check is not documented in specs. A malicious
402: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
403: * and bypass security checks (act as if it was from 127.0.0.1 by using
404: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 405: *
1.44 itojun 406: * This check chokes if we are in an SIIT cloud. As none of BSDs
407: * support IPv4-less kernel compilation, we cannot support SIIT
408: * environment at all. So, it makes more sense for us to reject any
409: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 410: * partial support for SIIT environment.
1.13 itojun 411: */
412: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
413: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
414: ip6stat.ip6s_badscope++;
415: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
416: goto bad;
417: }
1.17 itojun 418: #if 0
1.13 itojun 419: /*
1.17 itojun 420: * Reject packets with IPv4 compatible addresses (auto tunnel).
421: *
422: * The code forbids auto tunnel relay case in RFC1933 (the check is
423: * stronger than RFC1933). We may want to re-enable it if mech-xx
424: * is revised to forbid relaying case.
1.13 itojun 425: */
426: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
427: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
428: ip6stat.ip6s_badscope++;
429: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
430: goto bad;
431: }
432: #endif
1.35 itojun 433:
1.2 itojun 434: /*
1.82 yamt 435: * Disambiguate address scope zones (if there is ambiguity).
436: * We first make sure that the original source or destination address
437: * is not in our internal form for scoped addresses. Such addresses
438: * are not necessarily invalid spec-wise, but we cannot accept them due
439: * to the usage conflict.
440: * in6_setscope() then also checks and rejects the cases where src or
441: * dst are the loopback address and the receiving interface
442: * is not loopback.
443: */
1.88 bouyer 444: if (__predict_false(
445: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
446: goto bad;
447: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 448: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
449: ip6stat.ip6s_badscope++; /* XXX */
450: goto bad;
451: }
452: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
453: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
454: ip6stat.ip6s_badscope++;
455: goto bad;
456: }
457:
458: /*
1.2 itojun 459: * Multicast check
460: */
461: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
462: struct in6_multi *in6m = 0;
1.9 itojun 463:
464: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 465: /*
466: * See if we belong to the destination multicast group on the
467: * arrival interface.
468: */
469: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
470: if (in6m)
471: ours = 1;
472: else if (!ip6_mrouter) {
473: ip6stat.ip6s_notmember++;
474: ip6stat.ip6s_cantforward++;
1.9 itojun 475: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 476: goto bad;
477: }
1.9 itojun 478: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 479: goto hbhcheck;
480: }
481:
1.94.2.4! yamt 482: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
! 483:
1.2 itojun 484: /*
485: * Unicast check
486: */
1.94.2.4! yamt 487: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
! 488: if (hit)
1.25 itojun 489: ip6stat.ip6s_forward_cachehit++;
1.94.2.4! yamt 490: else
1.93 joerg 491: ip6stat.ip6s_forward_cachemiss++;
1.22 itojun 492:
1.2 itojun 493: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
494:
495: /*
496: * Accept the packet if the forwarding interface to the destination
497: * according to the routing table is the loopback interface,
498: * unless the associated route has a gateway.
499: * Note that this approach causes to accept a packet if there is a
500: * route to the loopback interface for the destination of the packet.
501: * But we think it's even useful in some situations, e.g. when using
502: * a special daemon which wants to intercept the packet.
503: */
1.94.2.4! yamt 504: if (rt != NULL &&
! 505: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
! 506: !(rt->rt_flags & RTF_CLONED) &&
1.2 itojun 507: #if 0
508: /*
509: * The check below is redundant since the comparison of
510: * the destination and the key of the rtentry has
511: * already done through looking up the routing table.
512: */
1.94.2.4! yamt 513: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_key(rt)->sin6_addr) &&
1.2 itojun 514: #endif
1.94.2.4! yamt 515: rt->rt_ifp->if_type == IFT_LOOP) {
! 516: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 517: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
518: m->m_flags |= M_ANYCAST6;
1.24 itojun 519: /*
520: * packets to a tentative, duplicated, or somehow invalid
521: * address must not be accepted.
522: */
1.2 itojun 523: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 524: /* this address is ready */
1.2 itojun 525: ours = 1;
1.9 itojun 526: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 527: goto hbhcheck;
528: } else {
1.24 itojun 529: /* address is not ready, so discard the packet. */
1.34 itojun 530: nd6log((LOG_INFO,
1.27 itojun 531: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 532: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 533: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 534:
535: goto bad;
1.2 itojun 536: }
537: }
538:
539: /*
1.55 itojun 540: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 541: */
542: #if defined(NFAITH) && 0 < NFAITH
543: if (ip6_keepfaith) {
1.94.2.4! yamt 544: if (rt != NULL && rt->rt_ifp != NULL &&
! 545: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 546: /* XXX do we need more sanity checks? */
547: ours = 1;
1.94.2.4! yamt 548: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 549: goto hbhcheck;
550: }
551: }
552: #endif
553:
554: #if 0
555: {
556: /*
557: * Last resort: check in6_ifaddr for incoming interface.
558: * The code is here until I update the "goto ours hack" code above
559: * working right.
560: */
561: struct ifaddr *ifa;
1.91 dyoung 562: TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) {
1.9 itojun 563: if (ifa->ifa_addr == NULL)
564: continue; /* just for safety */
565: if (ifa->ifa_addr->sa_family != AF_INET6)
566: continue;
567: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
568: ours = 1;
569: deliverifp = ifa->ifa_ifp;
1.2 itojun 570: goto hbhcheck;
571: }
572: }
1.9 itojun 573: }
1.2 itojun 574: #endif
575:
576: /*
577: * Now there is no reason to process the packet if it's not our own
578: * and we're not a router.
579: */
580: if (!ip6_forwarding) {
581: ip6stat.ip6s_cantforward++;
1.9 itojun 582: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 583: goto bad;
584: }
585:
586: hbhcheck:
587: /*
1.81 rpaulo 588: * record address information into m_tag, if we don't have one yet.
589: * note that we are unable to record it, if the address is not listed
590: * as our interface address (e.g. multicast addresses, addresses
591: * within FAITH prefixes and such).
592: */
593: if (deliverifp && !ip6_getdstifaddr(m)) {
594: struct in6_ifaddr *ia6;
595:
596: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
597: if (ia6) {
598: if (!ip6_setdstifaddr(m, ia6)) {
599: /*
600: * XXX maybe we should drop the packet here,
601: * as we could not provide enough information
602: * to the upper layers.
603: */
604: }
605: }
606: }
607:
608: /*
1.2 itojun 609: * Process Hop-by-Hop options header if it's contained.
610: * m may be modified in ip6_hopopts_input().
611: * If a JumboPayload option is included, plen will also be modified.
612: */
613: plen = (u_int32_t)ntohs(ip6->ip6_plen);
614: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 615: struct ip6_hbh *hbh;
616:
617: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
618: #if 0 /*touches NULL pointer*/
619: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
620: #endif
1.2 itojun 621: return; /* m have already been freed */
1.9 itojun 622: }
1.22 itojun 623:
1.2 itojun 624: /* adjust pointer */
625: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 626:
627: /*
1.49 itojun 628: * if the payload length field is 0 and the next header field
1.22 itojun 629: * indicates Hop-by-Hop Options header, then a Jumbo Payload
630: * option MUST be included.
631: */
632: if (ip6->ip6_plen == 0 && plen == 0) {
633: /*
634: * Note that if a valid jumbo payload option is
1.83 rpaulo 635: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 636: * (non-zero) payload length to the variable plen.
1.22 itojun 637: */
638: ip6stat.ip6s_badoptions++;
639: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
640: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
641: icmp6_error(m, ICMP6_PARAM_PROB,
642: ICMP6_PARAMPROB_HEADER,
1.94.2.2 rmind 643: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 644: return;
645: }
1.9 itojun 646: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
647: sizeof(struct ip6_hbh));
648: if (hbh == NULL) {
649: ip6stat.ip6s_tooshort++;
650: return;
651: }
1.57 thorpej 652: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 653: nxt = hbh->ip6h_nxt;
1.2 itojun 654:
655: /*
656: * accept the packet if a router alert option is included
657: * and we act as an IPv6 router.
658: */
1.5 itojun 659: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 660: ours = 1;
661: } else
662: nxt = ip6->ip6_nxt;
663:
664: /*
665: * Check that the amount of data in the buffers
666: * is as at least much as the IPv6 header would have us expect.
667: * Trim mbufs if longer than we expect.
668: * Drop packet if shorter than we expect.
669: */
670: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
671: ip6stat.ip6s_tooshort++;
1.9 itojun 672: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 673: goto bad;
674: }
675: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
676: if (m->m_len == m->m_pkthdr.len) {
677: m->m_len = sizeof(struct ip6_hdr) + plen;
678: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
679: } else
680: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
681: }
682:
683: /*
684: * Forward if desirable.
685: */
686: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
687: /*
688: * If we are acting as a multicast router, all
689: * incoming multicast packets are passed to the
690: * kernel-level multicast forwarding function.
691: * The packet is returned (relatively) intact; if
692: * ip6_mforward() returns a non-zero value, the packet
693: * must be discarded, else it may be accepted below.
694: */
695: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
696: ip6stat.ip6s_cantforward++;
697: m_freem(m);
698: return;
699: }
700: if (!ours) {
701: m_freem(m);
702: return;
703: }
1.22 itojun 704: } else if (!ours) {
1.64 itojun 705: ip6_forward(m, srcrt);
1.2 itojun 706: return;
1.56 itojun 707: }
1.25 itojun 708:
709: ip6 = mtod(m, struct ip6_hdr *);
710:
711: /*
712: * Malicious party may be able to use IPv4 mapped addr to confuse
713: * tcp/udp stack and bypass security checks (act as if it was from
714: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
715: *
716: * For SIIT end node behavior, you may want to disable the check.
717: * However, you will become vulnerable to attacks using IPv4 mapped
718: * source.
719: */
720: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
721: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
722: ip6stat.ip6s_badscope++;
723: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
724: goto bad;
725: }
1.2 itojun 726:
727: /*
728: * Tell launch routine the next header
729: */
1.12 itojun 730: #ifdef IFA_STATS
1.28 itojun 731: if (deliverifp != NULL) {
1.9 itojun 732: struct in6_ifaddr *ia6;
733: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
734: if (ia6)
735: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
736: }
737: #endif
1.2 itojun 738: ip6stat.ip6s_delivered++;
1.9 itojun 739: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 740: nest = 0;
1.40 itojun 741:
1.94.2.4! yamt 742: rh_present = 0;
1.2 itojun 743: while (nxt != IPPROTO_DONE) {
744: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
745: ip6stat.ip6s_toomanyhdr++;
1.94.2.4! yamt 746: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 747: goto bad;
748: }
1.8 itojun 749:
750: /*
751: * protection against faulty packet - there should be
752: * more sanity checks in header chain processing.
753: */
754: if (m->m_pkthdr.len < off) {
755: ip6stat.ip6s_tooshort++;
1.9 itojun 756: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 757: goto bad;
758: }
759:
1.94.2.4! yamt 760: if (nxt == IPPROTO_ROUTING) {
! 761: if (rh_present++) {
! 762: in6_ifstat_inc(m->m_pkthdr.rcvif,
! 763: ifs6_in_hdrerr);
! 764: ip6stat.ip6s_badoptions++;
! 765: goto bad;
! 766: }
! 767: }
! 768:
1.37 itojun 769: #ifdef IPSEC
770: /*
771: * enforce IPsec policy checking if we are seeing last header.
772: * note that we do not visit this with protocols with pcb layer
773: * code - like udp/tcp/raw ip.
774: */
775: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
776: ipsec6_in_reject(m, NULL)) {
777: ipsec6stat.in_polvio++;
778: goto bad;
779: }
780: #endif
1.94 degroote 781: #ifdef FAST_IPSEC
782: /*
783: * enforce IPsec policy checking if we are seeing last header.
784: * note that we do not visit this with protocols with pcb layer
785: * code - like udp/tcp/raw ip.
786: */
787: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
788: /*
789: * Check if the packet has already had IPsec processing
790: * done. If so, then just pass it along. This tag gets
791: * set during AH, ESP, etc. input handling, before the
792: * packet is returned to the ip input queue for delivery.
793: */
794: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
795: s = splsoftnet();
796: if (mtag != NULL) {
797: tdbi = (struct tdb_ident *)(mtag + 1);
798: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
799: } else {
800: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
801: IP_FORWARDING, &error);
802: }
803: if (sp != NULL) {
804: /*
805: * Check security policy against packet attributes.
806: */
807: error = ipsec_in_reject(sp, m);
808: KEY_FREESP(&sp);
809: } else {
810: /* XXX error stat??? */
811: error = EINVAL;
812: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
813: goto bad;
814: }
815: splx(s);
816: if (error)
817: goto bad;
818: }
819: #endif /* FAST_IPSEC */
820:
1.56 itojun 821:
1.2 itojun 822: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
823: }
824: return;
825: bad:
826: m_freem(m);
827: }
828:
829: /*
1.81 rpaulo 830: * set/grab in6_ifaddr correspond to IPv6 destination address.
831: */
832: static struct m_tag *
833: ip6_setdstifaddr(m, ia6)
834: struct mbuf *m;
835: struct in6_ifaddr *ia6;
836: {
837: struct m_tag *mtag;
838:
839: mtag = ip6_addaux(m);
840: if (mtag)
841: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
842: return mtag; /* NULL if failed to set */
843: }
844:
845: struct in6_ifaddr *
846: ip6_getdstifaddr(m)
847: struct mbuf *m;
848: {
849: struct m_tag *mtag;
850:
851: mtag = ip6_findaux(m);
852: if (mtag)
853: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
854: else
855: return NULL;
856: }
857:
858: /*
1.2 itojun 859: * Hop-by-Hop options header processing. If a valid jumbo payload option is
860: * included, the real payload length will be stored in plenp.
861: */
862: static int
863: ip6_hopopts_input(plenp, rtalertp, mp, offp)
864: u_int32_t *plenp;
1.5 itojun 865: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 866: struct mbuf **mp;
867: int *offp;
868: {
1.35 itojun 869: struct mbuf *m = *mp;
1.2 itojun 870: int off = *offp, hbhlen;
871: struct ip6_hbh *hbh;
872:
873: /* validation of the length of the header */
1.9 itojun 874: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
875: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
876: if (hbh == NULL) {
877: ip6stat.ip6s_tooshort++;
878: return -1;
879: }
880: hbhlen = (hbh->ip6h_len + 1) << 3;
881: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
882: hbhlen);
883: if (hbh == NULL) {
884: ip6stat.ip6s_tooshort++;
885: return -1;
886: }
1.57 thorpej 887: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 888: off += hbhlen;
889: hbhlen -= sizeof(struct ip6_hbh);
890:
891: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
892: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 893: return (-1);
1.2 itojun 894:
895: *offp = off;
896: *mp = m;
1.58 itojun 897: return (0);
1.2 itojun 898: }
899:
900: /*
901: * Search header for all Hop-by-hop options and process each option.
902: * This function is separate from ip6_hopopts_input() in order to
903: * handle a case where the sending node itself process its hop-by-hop
904: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 905: *
906: * The function assumes that hbh header is located right after the IPv6 header
907: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
908: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 909: */
910: int
911: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
912: struct mbuf *m;
913: u_int8_t *opthead;
914: int hbhlen;
1.5 itojun 915: u_int32_t *rtalertp;
1.2 itojun 916: u_int32_t *plenp;
917: {
918: struct ip6_hdr *ip6;
919: int optlen = 0;
920: u_int8_t *opt = opthead;
921: u_int16_t rtalert_val;
1.22 itojun 922: u_int32_t jumboplen;
1.55 itojun 923: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 924:
925: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 926: switch (*opt) {
927: case IP6OPT_PAD1:
928: optlen = 1;
929: break;
930: case IP6OPT_PADN:
931: if (hbhlen < IP6OPT_MINLEN) {
932: ip6stat.ip6s_toosmall++;
933: goto bad;
934: }
935: optlen = *(opt + 1) + 2;
936: break;
937: case IP6OPT_RTALERT:
938: /* XXX may need check for alignment */
939: if (hbhlen < IP6OPT_RTALERT_LEN) {
940: ip6stat.ip6s_toosmall++;
941: goto bad;
942: }
943: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 944: /* XXX stat */
945: icmp6_error(m, ICMP6_PARAM_PROB,
946: ICMP6_PARAMPROB_HEADER,
947: erroff + opt + 1 - opthead);
948: return (-1);
1.35 itojun 949: }
950: optlen = IP6OPT_RTALERT_LEN;
1.94.2.2 rmind 951: bcopy((void *)(opt + 2), (void *)&rtalert_val, 2);
1.35 itojun 952: *rtalertp = ntohs(rtalert_val);
953: break;
954: case IP6OPT_JUMBO:
1.22 itojun 955: /* XXX may need check for alignment */
956: if (hbhlen < IP6OPT_JUMBO_LEN) {
957: ip6stat.ip6s_toosmall++;
958: goto bad;
959: }
1.35 itojun 960: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 961: /* XXX stat */
962: icmp6_error(m, ICMP6_PARAM_PROB,
963: ICMP6_PARAMPROB_HEADER,
964: erroff + opt + 1 - opthead);
965: return (-1);
1.35 itojun 966: }
1.22 itojun 967: optlen = IP6OPT_JUMBO_LEN;
968:
969: /*
970: * IPv6 packets that have non 0 payload length
1.35 itojun 971: * must not contain a jumbo payload option.
1.22 itojun 972: */
973: ip6 = mtod(m, struct ip6_hdr *);
974: if (ip6->ip6_plen) {
975: ip6stat.ip6s_badoptions++;
976: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 977: ICMP6_PARAMPROB_HEADER,
978: erroff + opt - opthead);
979: return (-1);
1.22 itojun 980: }
1.2 itojun 981:
1.22 itojun 982: /*
983: * We may see jumbolen in unaligned location, so
984: * we'd need to perform bcopy().
985: */
986: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
987: jumboplen = (u_int32_t)htonl(jumboplen);
988:
989: #if 1
990: /*
991: * if there are multiple jumbo payload options,
992: * *plenp will be non-zero and the packet will be
993: * rejected.
994: * the behavior may need some debate in ipngwg -
995: * multiple options does not make sense, however,
996: * there's no explicit mention in specification.
997: */
998: if (*plenp != 0) {
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: }
1.8 itojun 1005: #endif
1.2 itojun 1006:
1.22 itojun 1007: /*
1008: * jumbo payload length must be larger than 65535.
1009: */
1010: if (jumboplen <= IPV6_MAXPACKET) {
1011: ip6stat.ip6s_badoptions++;
1012: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1013: ICMP6_PARAMPROB_HEADER,
1014: erroff + opt + 2 - opthead);
1015: return (-1);
1.22 itojun 1016: }
1017: *plenp = jumboplen;
1018:
1019: break;
1.35 itojun 1020: default: /* unknown option */
1021: if (hbhlen < IP6OPT_MINLEN) {
1022: ip6stat.ip6s_toosmall++;
1023: goto bad;
1024: }
1.55 itojun 1025: optlen = ip6_unknown_opt(opt, m,
1026: erroff + opt - opthead);
1027: if (optlen == -1)
1028: return (-1);
1.35 itojun 1029: optlen += 2;
1030: break;
1.2 itojun 1031: }
1032: }
1033:
1.55 itojun 1034: return (0);
1.2 itojun 1035:
1036: bad:
1037: m_freem(m);
1.55 itojun 1038: return (-1);
1.2 itojun 1039: }
1040:
1041: /*
1042: * Unknown option processing.
1043: * The third argument `off' is the offset from the IPv6 header to the option,
1044: * which is necessary if the IPv6 header the and option header and IPv6 header
1045: * is not continuous in order to return an ICMPv6 error.
1046: */
1047: int
1048: ip6_unknown_opt(optp, m, off)
1049: u_int8_t *optp;
1050: struct mbuf *m;
1051: int off;
1052: {
1053: struct ip6_hdr *ip6;
1054:
1.35 itojun 1055: switch (IP6OPT_TYPE(*optp)) {
1056: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1057: return ((int)*(optp + 1));
1.35 itojun 1058: case IP6OPT_TYPE_DISCARD: /* silently discard */
1059: m_freem(m);
1.58 itojun 1060: return (-1);
1.35 itojun 1061: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1062: ip6stat.ip6s_badoptions++;
1063: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1064: return (-1);
1.35 itojun 1065: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1066: ip6stat.ip6s_badoptions++;
1067: ip6 = mtod(m, struct ip6_hdr *);
1068: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1069: (m->m_flags & (M_BCAST|M_MCAST)))
1070: m_freem(m);
1071: else
1072: icmp6_error(m, ICMP6_PARAM_PROB,
1073: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1074: return (-1);
1.2 itojun 1075: }
1076:
1077: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1078: return (-1);
1.2 itojun 1079: }
1080:
1081: /*
1.9 itojun 1082: * Create the "control" list for this pcb.
1083: *
1084: * The routine will be called from upper layer handlers like tcp6_input().
1085: * Thus the routine assumes that the caller (tcp6_input) have already
1086: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1087: * very first mbuf on the mbuf chain.
1088: * We may want to add some infinite loop prevention or sanity checks for safety.
1089: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1090: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1091: */
1092: void
1093: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 1094: struct in6pcb *in6p;
1095: struct mbuf **mp;
1096: struct ip6_hdr *ip6;
1097: struct mbuf *m;
1.2 itojun 1098: {
1.85 rpaulo 1099: #ifdef RFC2292
1100: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1101: #else
1102: #define IS2292(x, y) (y)
1103: #endif
1104:
1.9 itojun 1105: #ifdef SO_TIMESTAMP
1.2 itojun 1106: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1107: struct timeval tv;
1108:
1109: microtime(&tv);
1.94.2.2 rmind 1110: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1111: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1112: if (*mp)
1113: mp = &(*mp)->m_next;
1114: }
1.9 itojun 1115: #endif
1.87 rpaulo 1116:
1117: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1118: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1119: return;
1120:
1.2 itojun 1121: /* RFC 2292 sec. 5 */
1.35 itojun 1122: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1123: struct in6_pktinfo pi6;
1.85 rpaulo 1124:
1.2 itojun 1125: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1126: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1127: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1128: m->m_pkthdr.rcvif->if_index : 0;
1.94.2.2 rmind 1129: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1130: sizeof(struct in6_pktinfo),
1131: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1132: if (*mp)
1133: mp = &(*mp)->m_next;
1134: }
1.85 rpaulo 1135:
1.2 itojun 1136: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1137: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1138:
1.94.2.2 rmind 1139: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1140: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1141: if (*mp)
1142: mp = &(*mp)->m_next;
1143: }
1144:
1145: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1146: u_int32_t flowinfo;
1147: int tclass;
1148:
1149: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1150: flowinfo >>= 20;
1151:
1152: tclass = flowinfo & 0xff;
1.94.2.2 rmind 1153: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1154: IPV6_TCLASS, IPPROTO_IPV6);
1155:
1.2 itojun 1156: if (*mp)
1157: mp = &(*mp)->m_next;
1158: }
1159:
1160: /*
1.75 itojun 1161: * IPV6_HOPOPTS socket option. Recall that we required super-user
1162: * privilege for the option (see ip6_ctloutput), but it might be too
1163: * strict, since there might be some hop-by-hop options which can be
1164: * returned to normal user.
1.85 rpaulo 1165: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1166: */
1.75 itojun 1167: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1168: /*
1169: * Check if a hop-by-hop options header is contatined in the
1170: * received packet, and if so, store the options as ancillary
1171: * data. Note that a hop-by-hop options header must be
1172: * just after the IPv6 header, which fact is assured through
1173: * the IPv6 input processing.
1174: */
1.78 christos 1175: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1176: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1177: struct ip6_hbh *hbh;
1178: int hbhlen;
1.62 itojun 1179: struct mbuf *ext;
1.9 itojun 1180:
1.62 itojun 1181: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1182: xip6->ip6_nxt);
1.62 itojun 1183: if (ext == NULL) {
1.9 itojun 1184: ip6stat.ip6s_tooshort++;
1185: return;
1186: }
1.62 itojun 1187: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1188: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1189: if (hbhlen != ext->m_len) {
1190: m_freem(ext);
1.9 itojun 1191: ip6stat.ip6s_tooshort++;
1192: return;
1193: }
1.2 itojun 1194:
1195: /*
1196: * XXX: We copy whole the header even if a jumbo
1197: * payload option is included, which option is to
1198: * be removed before returning in the RFC 2292.
1.85 rpaulo 1199: * Note: this constraint is removed in RFC3542.
1.2 itojun 1200: */
1.94.2.2 rmind 1201: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1202: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1203: IPPROTO_IPV6);
1.2 itojun 1204: if (*mp)
1205: mp = &(*mp)->m_next;
1.62 itojun 1206: m_freem(ext);
1.2 itojun 1207: }
1208: }
1209:
1210: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1211: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1212: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1213: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1214:
1215: /*
1216: * Search for destination options headers or routing
1217: * header(s) through the header chain, and stores each
1218: * header as ancillary data.
1219: * Note that the order of the headers remains in
1220: * the chain of ancillary data.
1221: */
1.86 rpaulo 1222: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1223: struct ip6_ext *ip6e = NULL;
1.9 itojun 1224: int elen;
1.62 itojun 1225: struct mbuf *ext = NULL;
1.9 itojun 1226:
1.62 itojun 1227: /*
1228: * if it is not an extension header, don't try to
1229: * pull it from the chain.
1230: */
1231: switch (nxt) {
1232: case IPPROTO_DSTOPTS:
1233: case IPPROTO_ROUTING:
1234: case IPPROTO_HOPOPTS:
1235: case IPPROTO_AH: /* is it possible? */
1236: break;
1237: default:
1238: goto loopend;
1239: }
1240:
1241: ext = ip6_pullexthdr(m, off, nxt);
1242: if (ext == NULL) {
1.9 itojun 1243: ip6stat.ip6s_tooshort++;
1244: return;
1245: }
1.62 itojun 1246: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1247: if (nxt == IPPROTO_AH)
1248: elen = (ip6e->ip6e_len + 2) << 2;
1249: else
1250: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1251: if (elen != ext->m_len) {
1252: m_freem(ext);
1.9 itojun 1253: ip6stat.ip6s_tooshort++;
1254: return;
1255: }
1.57 thorpej 1256: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1257:
1.35 itojun 1258: switch (nxt) {
1.62 itojun 1259: case IPPROTO_DSTOPTS:
1.35 itojun 1260: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1261: break;
1262:
1.94.2.2 rmind 1263: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1264: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1265: IPPROTO_IPV6);
1.35 itojun 1266: if (*mp)
1267: mp = &(*mp)->m_next;
1268: break;
1269:
1270: case IPPROTO_ROUTING:
1271: if (!in6p->in6p_flags & IN6P_RTHDR)
1272: break;
1273:
1.94.2.2 rmind 1274: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1275: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1276: IPPROTO_IPV6);
1.35 itojun 1277: if (*mp)
1278: mp = &(*mp)->m_next;
1279: break;
1280:
1.62 itojun 1281: case IPPROTO_HOPOPTS:
1282: case IPPROTO_AH: /* is it possible? */
1283: break;
1284:
1.35 itojun 1285: default:
1286: /*
1.62 itojun 1287: * other cases have been filtered in the above.
1288: * none will visit this case. here we supply
1289: * the code just in case (nxt overwritten or
1290: * other cases).
1.35 itojun 1291: */
1.62 itojun 1292: m_freem(ext);
1.35 itojun 1293: goto loopend;
1294:
1.2 itojun 1295: }
1296:
1297: /* proceed with the next header. */
1.9 itojun 1298: off += elen;
1.2 itojun 1299: nxt = ip6e->ip6e_nxt;
1.62 itojun 1300: ip6e = NULL;
1301: m_freem(ext);
1302: ext = NULL;
1.2 itojun 1303: }
1304: loopend:
1.62 itojun 1305: ;
1.2 itojun 1306: }
1.62 itojun 1307: }
1.85 rpaulo 1308: #undef IS2292
1309:
1310:
1311: void
1.94.2.1 yamt 1312: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1313: uint32_t *mtu)
1.85 rpaulo 1314: {
1315: struct socket *so;
1316: struct mbuf *m_mtu;
1317: struct ip6_mtuinfo mtuctl;
1318:
1319: so = in6p->in6p_socket;
1320:
1321: if (mtu == NULL)
1322: return;
1323:
1324: #ifdef DIAGNOSTIC
1325: if (so == NULL) /* I believe this is impossible */
1326: panic("ip6_notify_pmtu: socket is NULL");
1327: #endif
1328:
1329: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1330: mtuctl.ip6m_mtu = *mtu;
1331: mtuctl.ip6m_addr = *dst;
1332: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1333: return;
1334:
1.94.2.2 rmind 1335: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1336: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1337: return;
1338:
1.94.2.1 yamt 1339: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1340: == 0) {
1341: m_freem(m_mtu);
1342: /* XXX: should count statistics */
1343: } else
1344: sorwakeup(so);
1345:
1346: return;
1347: }
1.62 itojun 1348:
1349: /*
1350: * pull single extension header from mbuf chain. returns single mbuf that
1351: * contains the result, or NULL on error.
1352: */
1353: static struct mbuf *
1354: ip6_pullexthdr(m, off, nxt)
1355: struct mbuf *m;
1356: size_t off;
1357: int nxt;
1358: {
1359: struct ip6_ext ip6e;
1360: size_t elen;
1361: struct mbuf *n;
1362:
1363: #ifdef DIAGNOSTIC
1364: switch (nxt) {
1365: case IPPROTO_DSTOPTS:
1366: case IPPROTO_ROUTING:
1367: case IPPROTO_HOPOPTS:
1368: case IPPROTO_AH: /* is it possible? */
1369: break;
1370: default:
1371: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1372: }
1.62 itojun 1373: #endif
1.2 itojun 1374:
1.94.2.2 rmind 1375: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1376: if (nxt == IPPROTO_AH)
1377: elen = (ip6e.ip6e_len + 2) << 2;
1378: else
1379: elen = (ip6e.ip6e_len + 1) << 3;
1380:
1381: MGET(n, M_DONTWAIT, MT_DATA);
1382: if (n && elen >= MLEN) {
1383: MCLGET(n, M_DONTWAIT);
1384: if ((n->m_flags & M_EXT) == 0) {
1385: m_free(n);
1386: n = NULL;
1387: }
1388: }
1389: if (!n)
1390: return NULL;
1391:
1392: n->m_len = 0;
1393: if (elen >= M_TRAILINGSPACE(n)) {
1394: m_free(n);
1395: return NULL;
1396: }
1397:
1.94.2.2 rmind 1398: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1399: n->m_len = elen;
1400: return n;
1.2 itojun 1401: }
1402:
1403: /*
1404: * Get pointer to the previous header followed by the header
1405: * currently processed.
1406: * XXX: This function supposes that
1407: * M includes all headers,
1408: * the next header field and the header length field of each header
1409: * are valid, and
1410: * the sum of each header length equals to OFF.
1411: * Because of these assumptions, this function must be called very
1412: * carefully. Moreover, it will not be used in the near future when
1413: * we develop `neater' mechanism to process extension headers.
1414: */
1.58 itojun 1415: u_int8_t *
1.2 itojun 1416: ip6_get_prevhdr(m, off)
1417: struct mbuf *m;
1418: int off;
1419: {
1420: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1421:
1422: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1423: return (&ip6->ip6_nxt);
1.2 itojun 1424: else {
1425: int len, nxt;
1426: struct ip6_ext *ip6e = NULL;
1427:
1428: nxt = ip6->ip6_nxt;
1429: len = sizeof(struct ip6_hdr);
1430: while (len < off) {
1.94.2.2 rmind 1431: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1432:
1.35 itojun 1433: switch (nxt) {
1.2 itojun 1434: case IPPROTO_FRAGMENT:
1435: len += sizeof(struct ip6_frag);
1436: break;
1437: case IPPROTO_AH:
1438: len += (ip6e->ip6e_len + 2) << 2;
1439: break;
1440: default:
1441: len += (ip6e->ip6e_len + 1) << 3;
1442: break;
1443: }
1444: nxt = ip6e->ip6e_nxt;
1445: }
1446: if (ip6e)
1.58 itojun 1447: return (&ip6e->ip6e_nxt);
1.2 itojun 1448: else
1449: return NULL;
1.18 itojun 1450: }
1451: }
1452:
1453: /*
1454: * get next header offset. m will be retained.
1455: */
1456: int
1457: ip6_nexthdr(m, off, proto, nxtp)
1458: struct mbuf *m;
1459: int off;
1460: int proto;
1461: int *nxtp;
1462: {
1463: struct ip6_hdr ip6;
1464: struct ip6_ext ip6e;
1465: struct ip6_frag fh;
1466:
1467: /* just in case */
1468: if (m == NULL)
1469: panic("ip6_nexthdr: m == NULL");
1470: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1471: return -1;
1472:
1473: switch (proto) {
1474: case IPPROTO_IPV6:
1.83 rpaulo 1475: /* do not chase beyond intermediate IPv6 headers */
1476: if (off != 0)
1477: return -1;
1.18 itojun 1478: if (m->m_pkthdr.len < off + sizeof(ip6))
1479: return -1;
1.94.2.2 rmind 1480: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1481: if (nxtp)
1482: *nxtp = ip6.ip6_nxt;
1483: off += sizeof(ip6);
1484: return off;
1485:
1486: case IPPROTO_FRAGMENT:
1487: /*
1488: * terminate parsing if it is not the first fragment,
1489: * it does not make sense to parse through it.
1490: */
1491: if (m->m_pkthdr.len < off + sizeof(fh))
1492: return -1;
1.94.2.2 rmind 1493: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1494: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1495: return -1;
1496: if (nxtp)
1497: *nxtp = fh.ip6f_nxt;
1498: off += sizeof(struct ip6_frag);
1499: return off;
1500:
1501: case IPPROTO_AH:
1502: if (m->m_pkthdr.len < off + sizeof(ip6e))
1503: return -1;
1.94.2.2 rmind 1504: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1505: if (nxtp)
1506: *nxtp = ip6e.ip6e_nxt;
1507: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1508: if (m->m_pkthdr.len < off)
1509: return -1;
1.18 itojun 1510: return off;
1511:
1512: case IPPROTO_HOPOPTS:
1513: case IPPROTO_ROUTING:
1514: case IPPROTO_DSTOPTS:
1515: if (m->m_pkthdr.len < off + sizeof(ip6e))
1516: return -1;
1.94.2.2 rmind 1517: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1518: if (nxtp)
1519: *nxtp = ip6e.ip6e_nxt;
1520: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1521: if (m->m_pkthdr.len < off)
1522: return -1;
1.18 itojun 1523: return off;
1524:
1525: case IPPROTO_NONE:
1526: case IPPROTO_ESP:
1527: case IPPROTO_IPCOMP:
1528: /* give up */
1529: return -1;
1530:
1531: default:
1532: return -1;
1533: }
1534: }
1535:
1536: /*
1537: * get offset for the last header in the chain. m will be kept untainted.
1538: */
1539: int
1540: ip6_lasthdr(m, off, proto, nxtp)
1541: struct mbuf *m;
1542: int off;
1543: int proto;
1544: int *nxtp;
1545: {
1546: int newoff;
1547: int nxt;
1548:
1549: if (!nxtp) {
1550: nxt = -1;
1551: nxtp = &nxt;
1552: }
1.86 rpaulo 1553: for (;;) {
1.18 itojun 1554: newoff = ip6_nexthdr(m, off, proto, nxtp);
1555: if (newoff < 0)
1556: return off;
1557: else if (newoff < off)
1558: return -1; /* invalid */
1559: else if (newoff == off)
1560: return newoff;
1561:
1562: off = newoff;
1563: proto = *nxtp;
1.2 itojun 1564: }
1565: }
1566:
1.81 rpaulo 1567: struct m_tag *
1568: ip6_addaux(m)
1569: struct mbuf *m;
1570: {
1571: struct m_tag *mtag;
1572:
1573: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1574: if (!mtag) {
1575: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1576: M_NOWAIT);
1577: if (mtag) {
1578: m_tag_prepend(m, mtag);
1579: bzero(mtag + 1, sizeof(struct ip6aux));
1580: }
1581: }
1582: return mtag;
1583: }
1584:
1585: struct m_tag *
1586: ip6_findaux(m)
1587: struct mbuf *m;
1588: {
1589: struct m_tag *mtag;
1590:
1591: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1592: return mtag;
1593: }
1594:
1595: void
1596: ip6_delaux(m)
1597: struct mbuf *m;
1598: {
1599: struct m_tag *mtag;
1600:
1601: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1602: if (mtag)
1603: m_tag_delete(m, mtag);
1604: }
1605:
1.94.2.2 rmind 1606: #ifdef GATEWAY
1607: /*
1608: * sysctl helper routine for net.inet.ip6.maxflows. Since
1609: * we could reduce this value, call ip6flow_reap();
1610: */
1611: static int
1.94.2.3 yamt 1612: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.94.2.2 rmind 1613: {
1614: int s;
1615:
1616: s = sysctl_lookup(SYSCTLFN_CALL(rnode));
1.94.2.3 yamt 1617: if (s || newp == NULL)
1.94.2.2 rmind 1618: return (s);
1619:
1620: s = splsoftnet();
1621: ip6flow_reap(0);
1622: splx(s);
1623:
1624: return (0);
1625: }
1.94.2.3 yamt 1626:
1627: static int
1628: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1629: {
1630: int error, tmp;
1631: struct sysctlnode node;
1632:
1633: node = *rnode;
1634: tmp = ip6_hashsize;
1635: node.sysctl_data = &tmp;
1636: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1637: if (error || newp == NULL)
1638: return (error);
1639:
1640: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1641: /*
1642: * Can only fail due to malloc()
1643: */
1644: if (ip6flow_invalidate_all(tmp))
1645: return ENOMEM;
1646: } else {
1647: /*
1648: * EINVAL if not a power of 2
1649: */
1650: return EINVAL;
1651: }
1652:
1653: return (0);
1654: }
1.94.2.2 rmind 1655: #endif /* GATEWAY */
1656:
1.94.2.4! yamt 1657: static int
! 1658: sysctl_net_inet6_ip6_rht0(SYSCTLFN_ARGS)
! 1659: {
! 1660: int error, tmp;
! 1661: struct sysctlnode node;
! 1662:
! 1663: node = *rnode;
! 1664: tmp = ip6_rht0;
! 1665: node.sysctl_data = &tmp;
! 1666: error = sysctl_lookup(SYSCTLFN_CALL(&node));
! 1667: if (error || newp == NULL)
! 1668: return error;
! 1669:
! 1670: switch (tmp) {
! 1671: case -1: /* disable processing */
! 1672: case 0: /* disable for host, enable for router */
! 1673: case 1: /* enable for all */
! 1674: break;
! 1675: default:
! 1676: return EINVAL;
! 1677: }
! 1678: ip6_rht0 = tmp;
! 1679: return 0;
! 1680: }
! 1681:
1.2 itojun 1682: /*
1683: * System control for IP6
1684: */
1685:
1686: u_char inet6ctlerrmap[PRC_NCMDS] = {
1687: 0, 0, 0, 0,
1688: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1689: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1690: EMSGSIZE, EHOSTUNREACH, 0, 0,
1691: 0, 0, 0, 0,
1692: ENOPROTOOPT
1693: };
1694:
1.70 atatat 1695: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1696: {
1.85 rpaulo 1697: #ifdef RFC2292
1698: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1699: #else
1700: #define IS2292(x, y) (y)
1701: #endif
1.26 itojun 1702:
1.73 atatat 1703: sysctl_createv(clog, 0, NULL, NULL,
1704: CTLFLAG_PERMANENT,
1.70 atatat 1705: CTLTYPE_NODE, "net", NULL,
1706: NULL, 0, NULL, 0,
1707: CTL_NET, CTL_EOL);
1.73 atatat 1708: sysctl_createv(clog, 0, NULL, NULL,
1709: CTLFLAG_PERMANENT,
1.74 atatat 1710: CTLTYPE_NODE, "inet6",
1711: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1712: NULL, 0, NULL, 0,
1713: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1714: sysctl_createv(clog, 0, NULL, NULL,
1715: CTLFLAG_PERMANENT,
1.74 atatat 1716: CTLTYPE_NODE, "ip6",
1717: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1718: NULL, 0, NULL, 0,
1719: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1720:
1.73 atatat 1721: sysctl_createv(clog, 0, NULL, NULL,
1722: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1723: CTLTYPE_INT, "forwarding",
1724: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1725: NULL, 0, &ip6_forwarding, 0,
1726: CTL_NET, PF_INET6, IPPROTO_IPV6,
1727: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1728: sysctl_createv(clog, 0, NULL, NULL,
1729: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1730: CTLTYPE_INT, "redirect",
1731: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1732: NULL, 0, &ip6_sendredirects, 0,
1733: CTL_NET, PF_INET6, IPPROTO_IPV6,
1734: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1735: sysctl_createv(clog, 0, NULL, NULL,
1736: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1737: CTLTYPE_INT, "hlim",
1738: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1739: NULL, 0, &ip6_defhlim, 0,
1740: CTL_NET, PF_INET6, IPPROTO_IPV6,
1741: IPV6CTL_DEFHLIM, CTL_EOL);
1742: #ifdef notyet
1.73 atatat 1743: sysctl_createv(clog, 0, NULL, NULL,
1744: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1745: CTLTYPE_INT, "mtu", NULL,
1746: NULL, 0, &, 0,
1747: CTL_NET, PF_INET6, IPPROTO_IPV6,
1748: IPV6CTL_DEFMTU, CTL_EOL);
1749: #endif
1750: #ifdef __no_idea__
1.73 atatat 1751: sysctl_createv(clog, 0, NULL, NULL,
1752: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1753: CTLTYPE_INT, "forwsrcrt", NULL,
1754: NULL, 0, &?, 0,
1755: CTL_NET, PF_INET6, IPPROTO_IPV6,
1756: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1757: sysctl_createv(clog, 0, NULL, NULL,
1758: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1759: CTLTYPE_STRUCT, "mrtstats", NULL,
1760: NULL, 0, &?, sizeof(?),
1761: CTL_NET, PF_INET6, IPPROTO_IPV6,
1762: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1763: sysctl_createv(clog, 0, NULL, NULL,
1764: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1765: CTLTYPE_?, "mrtproto", NULL,
1766: NULL, 0, &?, sizeof(?),
1767: CTL_NET, PF_INET6, IPPROTO_IPV6,
1768: IPV6CTL_MRTPROTO, CTL_EOL);
1769: #endif
1.73 atatat 1770: sysctl_createv(clog, 0, NULL, NULL,
1771: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1772: CTLTYPE_INT, "maxfragpackets",
1773: SYSCTL_DESCR("Maximum number of fragments to buffer "
1774: "for reassembly"),
1.70 atatat 1775: NULL, 0, &ip6_maxfragpackets, 0,
1776: CTL_NET, PF_INET6, IPPROTO_IPV6,
1777: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1778: #ifdef __no_idea__
1.73 atatat 1779: sysctl_createv(clog, 0, NULL, NULL,
1780: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1781: CTLTYPE_INT, "sourcecheck", NULL,
1782: NULL, 0, &?, 0,
1783: CTL_NET, PF_INET6, IPPROTO_IPV6,
1784: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1785: sysctl_createv(clog, 0, NULL, NULL,
1786: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1787: CTLTYPE_INT, "sourcecheck_logint", NULL,
1788: NULL, 0, &?, 0,
1789: CTL_NET, PF_INET6, IPPROTO_IPV6,
1790: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1791: #endif
1.73 atatat 1792: sysctl_createv(clog, 0, NULL, NULL,
1793: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1794: CTLTYPE_INT, "accept_rtadv",
1795: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1796: NULL, 0, &ip6_accept_rtadv, 0,
1797: CTL_NET, PF_INET6, IPPROTO_IPV6,
1798: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1799: sysctl_createv(clog, 0, NULL, NULL,
1800: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1801: CTLTYPE_INT, "keepfaith",
1802: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1803: NULL, 0, &ip6_keepfaith, 0,
1804: CTL_NET, PF_INET6, IPPROTO_IPV6,
1805: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1806: sysctl_createv(clog, 0, NULL, NULL,
1807: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1808: CTLTYPE_INT, "log_interval",
1809: SYSCTL_DESCR("Minumum interval between logging "
1810: "unroutable packets"),
1.70 atatat 1811: NULL, 0, &ip6_log_interval, 0,
1812: CTL_NET, PF_INET6, IPPROTO_IPV6,
1813: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1814: sysctl_createv(clog, 0, NULL, NULL,
1815: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1816: CTLTYPE_INT, "hdrnestlimit",
1817: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1818: NULL, 0, &ip6_hdrnestlimit, 0,
1819: CTL_NET, PF_INET6, IPPROTO_IPV6,
1820: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1821: sysctl_createv(clog, 0, NULL, NULL,
1822: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1823: CTLTYPE_INT, "dad_count",
1824: SYSCTL_DESCR("Number of Duplicate Address Detection "
1825: "probes to send"),
1.70 atatat 1826: NULL, 0, &ip6_dad_count, 0,
1827: CTL_NET, PF_INET6, IPPROTO_IPV6,
1828: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1829: sysctl_createv(clog, 0, NULL, NULL,
1830: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1831: CTLTYPE_INT, "auto_flowlabel",
1832: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1833: NULL, 0, &ip6_auto_flowlabel, 0,
1834: CTL_NET, PF_INET6, IPPROTO_IPV6,
1835: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1836: sysctl_createv(clog, 0, NULL, NULL,
1837: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1838: CTLTYPE_INT, "defmcasthlim",
1839: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1840: NULL, 0, &ip6_defmcasthlim, 0,
1841: CTL_NET, PF_INET6, IPPROTO_IPV6,
1842: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1843: #if NGIF > 0
1.73 atatat 1844: sysctl_createv(clog, 0, NULL, NULL,
1845: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1846: CTLTYPE_INT, "gifhlim",
1847: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1848: NULL, 0, &ip6_gif_hlim, 0,
1849: CTL_NET, PF_INET6, IPPROTO_IPV6,
1850: IPV6CTL_GIF_HLIM, CTL_EOL);
1851: #endif /* NGIF */
1.73 atatat 1852: sysctl_createv(clog, 0, NULL, NULL,
1853: CTLFLAG_PERMANENT,
1.74 atatat 1854: CTLTYPE_STRING, "kame_version",
1855: SYSCTL_DESCR("KAME Version"),
1.78 christos 1856: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1857: CTL_NET, PF_INET6, IPPROTO_IPV6,
1858: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1859: sysctl_createv(clog, 0, NULL, NULL,
1860: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1861: CTLTYPE_INT, "use_deprecated",
1862: SYSCTL_DESCR("Allow use of deprecated addresses as "
1863: "source addresses"),
1.70 atatat 1864: NULL, 0, &ip6_use_deprecated, 0,
1865: CTL_NET, PF_INET6, IPPROTO_IPV6,
1866: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1867: sysctl_createv(clog, 0, NULL, NULL,
1868: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1869: CTLTYPE_INT, "rr_prune", NULL,
1870: NULL, 0, &ip6_rr_prune, 0,
1871: CTL_NET, PF_INET6, IPPROTO_IPV6,
1872: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1873: sysctl_createv(clog, 0, NULL, NULL,
1874: CTLFLAG_PERMANENT
1.70 atatat 1875: #ifndef INET6_BINDV6ONLY
1.73 atatat 1876: |CTLFLAG_READWRITE,
1.70 atatat 1877: #endif
1.74 atatat 1878: CTLTYPE_INT, "v6only",
1879: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1880: "to PF_INET sockets"),
1.70 atatat 1881: NULL, 0, &ip6_v6only, 0,
1882: CTL_NET, PF_INET6, IPPROTO_IPV6,
1883: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1884: sysctl_createv(clog, 0, NULL, NULL,
1885: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1886: CTLTYPE_INT, "anonportmin",
1887: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1888: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1889: CTL_NET, PF_INET6, IPPROTO_IPV6,
1890: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1891: sysctl_createv(clog, 0, NULL, NULL,
1892: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1893: CTLTYPE_INT, "anonportmax",
1894: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1895: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1896: CTL_NET, PF_INET6, IPPROTO_IPV6,
1897: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1898: #ifndef IPNOPRIVPORTS
1.73 atatat 1899: sysctl_createv(clog, 0, NULL, NULL,
1900: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1901: CTLTYPE_INT, "lowportmin",
1902: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1903: "to assign"),
1.70 atatat 1904: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1905: CTL_NET, PF_INET6, IPPROTO_IPV6,
1906: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1907: sysctl_createv(clog, 0, NULL, NULL,
1908: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1909: CTLTYPE_INT, "lowportmax",
1910: SYSCTL_DESCR("Highest privileged ephemeral port number "
1911: "to assign"),
1.70 atatat 1912: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1913: CTL_NET, PF_INET6, IPPROTO_IPV6,
1914: IPV6CTL_LOWPORTMAX, CTL_EOL);
1915: #endif /* IPNOPRIVPORTS */
1.73 atatat 1916: sysctl_createv(clog, 0, NULL, NULL,
1917: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1918: CTLTYPE_INT, "use_tempaddr",
1919: SYSCTL_DESCR("Use temporary address"),
1920: NULL, 0, &ip6_use_tempaddr, 0,
1921: CTL_NET, PF_INET6, IPPROTO_IPV6,
1922: CTL_CREATE, CTL_EOL);
1923: sysctl_createv(clog, 0, NULL, NULL,
1924: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1925: CTLTYPE_INT, "temppltime",
1926: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1927: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1928: CTL_NET, PF_INET6, IPPROTO_IPV6,
1929: CTL_CREATE, CTL_EOL);
1930: sysctl_createv(clog, 0, NULL, NULL,
1931: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1932: CTLTYPE_INT, "tempvltime",
1933: SYSCTL_DESCR("valid lifetime of a temporary address"),
1934: NULL, 0, &ip6_temp_valid_lifetime, 0,
1935: CTL_NET, PF_INET6, IPPROTO_IPV6,
1936: CTL_CREATE, CTL_EOL);
1937: sysctl_createv(clog, 0, NULL, NULL,
1938: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1939: CTLTYPE_INT, "maxfrags",
1940: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1941: NULL, 0, &ip6_maxfrags, 0,
1942: CTL_NET, PF_INET6, IPPROTO_IPV6,
1943: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1944: sysctl_createv(clog, 0, NULL, NULL,
1945: CTLFLAG_PERMANENT,
1946: CTLTYPE_STRUCT, "stats",
1947: SYSCTL_DESCR("IPv6 statistics"),
1948: NULL, 0, &ip6stat, sizeof(ip6stat),
1949: CTL_NET, PF_INET6, IPPROTO_IPV6,
1950: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1951: sysctl_createv(clog, 0, NULL, NULL,
1952: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1953: CTLTYPE_INT, "use_defaultzone",
1954: SYSCTL_DESCR("Whether to use the default scope zones"),
1955: NULL, 0, &ip6_use_defzone, 0,
1956: CTL_NET, PF_INET6, IPPROTO_IPV6,
1957: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1958: sysctl_createv(clog, 0, NULL, NULL,
1959: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1960: CTLTYPE_INT, "mcast_pmtu",
1961: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1962: NULL, 0, &ip6_mcast_pmtu, 0,
1963: CTL_NET, PF_INET6, IPPROTO_IPV6,
1964: CTL_CREATE, CTL_EOL);
1.94.2.2 rmind 1965: #ifdef GATEWAY
1966: sysctl_createv(clog, 0, NULL, NULL,
1967: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1968: CTLTYPE_INT, "maxflows",
1969: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.94.2.3 yamt 1970: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1971: CTL_NET, PF_INET6, IPPROTO_IPV6,
1972: CTL_CREATE, CTL_EOL);
1973: sysctl_createv(clog, 0, NULL, NULL,
1974: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1975: CTLTYPE_INT, "hashsize",
1976: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1977: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1.94.2.2 rmind 1978: CTL_NET, PF_INET6, IPPROTO_IPV6,
1979: CTL_CREATE, CTL_EOL);
1980: #endif
1.94.2.4! yamt 1981: sysctl_createv(clog, 0, NULL, NULL,
! 1982: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1983: CTLTYPE_INT, "rht0",
! 1984: SYSCTL_DESCR("Processing of routing header type 0 (IPv6)"),
! 1985: sysctl_net_inet6_ip6_rht0, 0, &ip6_rht0, 0,
! 1986: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1987: CTL_CREATE, CTL_EOL);
1.2 itojun 1988: }
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