Annotation of src/sys/netinet6/ip6_input.c, Revision 1.115
1.115 ! thorpej 1: /* $NetBSD: ip6_input.c,v 1.114 2008/02/27 19:40:56 matt 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>
1.115 ! thorpej 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.114 2008/02/27 19:40:56 matt Exp $");
1.2 itojun 66:
67: #include "opt_inet.h"
1.85 rpaulo 68: #include "opt_inet6.h"
1.4 thorpej 69: #include "opt_ipsec.h"
1.15 darrenr 70: #include "opt_pfil_hooks.h"
1.2 itojun 71:
72: #include <sys/param.h>
73: #include <sys/systm.h>
74: #include <sys/malloc.h>
75: #include <sys/mbuf.h>
76: #include <sys/domain.h>
77: #include <sys/protosw.h>
78: #include <sys/socket.h>
79: #include <sys/socketvar.h>
80: #include <sys/errno.h>
81: #include <sys/time.h>
82: #include <sys/kernel.h>
83: #include <sys/syslog.h>
84: #include <sys/proc.h>
1.46 simonb 85: #include <sys/sysctl.h>
1.2 itojun 86:
87: #include <net/if.h>
88: #include <net/if_types.h>
89: #include <net/if_dl.h>
90: #include <net/route.h>
91: #include <net/netisr.h>
1.15 darrenr 92: #ifdef PFIL_HOOKS
93: #include <net/pfil.h>
94: #endif
1.2 itojun 95:
96: #include <netinet/in.h>
1.9 itojun 97: #include <netinet/in_systm.h>
98: #ifdef INET
99: #include <netinet/ip.h>
100: #include <netinet/ip_icmp.h>
1.45 itojun 101: #endif /* INET */
1.14 itojun 102: #include <netinet/ip6.h>
1.2 itojun 103: #include <netinet6/in6_var.h>
1.11 itojun 104: #include <netinet6/ip6_var.h>
1.2 itojun 105: #include <netinet6/in6_pcb.h>
1.14 itojun 106: #include <netinet/icmp6.h>
1.81 rpaulo 107: #include <netinet6/scope6_var.h>
1.2 itojun 108: #include <netinet6/in6_ifattach.h>
109: #include <netinet6/nd6.h>
110:
1.37 itojun 111: #ifdef IPSEC
112: #include <netinet6/ipsec.h>
113: #endif
114:
1.94 degroote 115: #ifdef FAST_IPSEC
116: #include <netipsec/ipsec.h>
117: #include <netipsec/ipsec6.h>
118: #include <netipsec/key.h>
119: #endif /* FAST_IPSEC */
120:
1.2 itojun 121: #include <netinet6/ip6protosw.h>
122:
123: #include "faith.h"
124: #include "gif.h"
1.50 itojun 125:
126: #if NGIF > 0
127: #include <netinet6/in6_gif.h>
128: #endif
1.2 itojun 129:
1.9 itojun 130: #include <net/net_osdep.h>
131:
1.2 itojun 132: extern struct domain inet6domain;
133:
134: u_char ip6_protox[IPPROTO_MAX];
135: static int ip6qmaxlen = IFQ_MAXLEN;
136: struct in6_ifaddr *in6_ifaddr;
137: struct ifqueue ip6intrq;
138:
1.108 ad 139: extern callout_t in6_tmpaddrtimer_ch;
1.83 rpaulo 140:
1.2 itojun 141: int ip6_forward_srcrt; /* XXX */
142: int ip6_sourcecheck; /* XXX */
143: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 144:
1.29 thorpej 145: #ifdef PFIL_HOOKS
146: struct pfil_head inet6_pfil_hook;
147: #endif
148:
1.115 ! thorpej 149: uint64_t ip6stat[IP6_NSTATS];
1.2 itojun 150:
1.111 dyoung 151: static void ip6_init2(void *);
1.112 dyoung 152: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 153:
1.111 dyoung 154: static int ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *);
155: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.2 itojun 156:
157: /*
158: * IP6 initialization: fill in IP6 protocol switch table.
159: * All protocols not implemented in kernel go to raw IP6 protocol handler.
160: */
161: void
1.114 matt 162: ip6_init(void)
1.2 itojun 163: {
1.78 christos 164: const struct ip6protosw *pr;
1.35 itojun 165: int i;
1.2 itojun 166:
1.78 christos 167: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 168: if (pr == 0)
169: panic("ip6_init");
170: for (i = 0; i < IPPROTO_MAX; i++)
171: ip6_protox[i] = pr - inet6sw;
1.78 christos 172: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
173: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 174: if (pr->pr_domain->dom_family == PF_INET6 &&
175: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
176: ip6_protox[pr->pr_protocol] = pr - inet6sw;
177: ip6intrq.ifq_maxlen = ip6qmaxlen;
1.81 rpaulo 178: scope6_init();
179: addrsel_policy_init();
1.2 itojun 180: nd6_init();
181: frag6_init();
1.83 rpaulo 182: ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 183:
184: ip6_init2((void *)0);
1.98 liamjfoy 185: #ifdef GATEWAY
1.99 liamjfoy 186: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 187: #endif
1.29 thorpej 188:
189: #ifdef PFIL_HOOKS
190: /* Register our Packet Filter hook. */
1.33 thorpej 191: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
192: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 193: i = pfil_head_register(&inet6_pfil_hook);
194: if (i != 0)
195: printf("ip6_init: WARNING: unable to register pfil hook, "
196: "error %d\n", i);
197: #endif /* PFIL_HOOKS */
1.2 itojun 198: }
199:
200: static void
1.90 christos 201: ip6_init2(void *dummy)
1.2 itojun 202: {
203:
204: /* nd6_timer_init */
1.108 ad 205: callout_init(&nd6_timer_ch, 0);
1.19 thorpej 206: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83 rpaulo 207:
208: /* timer for regeneranation of temporary addresses randomize ID */
1.108 ad 209: callout_init(&in6_tmpaddrtimer_ch, 0);
1.83 rpaulo 210: callout_reset(&in6_tmpaddrtimer_ch,
211: (ip6_temp_preferred_lifetime - ip6_desync_factor -
212: ip6_temp_regen_advance) * hz,
213: in6_tmpaddrtimer, NULL);
1.2 itojun 214: }
215:
216: /*
217: * IP6 input interrupt handling. Just pass the packet to ip6_input.
218: */
219: void
1.114 matt 220: ip6intr(void)
1.2 itojun 221: {
222: int s;
223: struct mbuf *m;
224:
225: for (;;) {
1.41 thorpej 226: s = splnet();
1.2 itojun 227: IF_DEQUEUE(&ip6intrq, m);
228: splx(s);
229: if (m == 0)
230: return;
1.83 rpaulo 231: /* drop the packet if IPv6 operation is disabled on the IF */
232: if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {
233: m_freem(m);
234: return;
235: }
1.2 itojun 236: ip6_input(m);
237: }
238: }
239:
1.103 dyoung 240: extern struct route ip6_forward_rt;
1.2 itojun 241:
242: void
1.96 dyoung 243: ip6_input(struct mbuf *m)
1.2 itojun 244: {
1.9 itojun 245: struct ip6_hdr *ip6;
1.105 dyoung 246: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 247: u_int32_t plen;
1.5 itojun 248: u_int32_t rtalert = ~0;
1.104 yamt 249: int nxt, ours = 0, rh_present = 0;
1.9 itojun 250: struct ifnet *deliverifp = NULL;
1.64 itojun 251: int srcrt = 0;
1.105 dyoung 252: const struct rtentry *rt;
253: union {
254: struct sockaddr dst;
255: struct sockaddr_in6 dst6;
256: } u;
1.94 degroote 257: #ifdef FAST_IPSEC
258: struct m_tag *mtag;
259: struct tdb_ident *tdbi;
260: struct secpolicy *sp;
261: int s, error;
262: #endif
1.2 itojun 263:
264: #ifdef IPSEC
265: /*
266: * should the inner packet be considered authentic?
267: * see comment in ah4_input().
268: */
1.49 itojun 269: m->m_flags &= ~M_AUTHIPHDR;
270: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 271: #endif
1.9 itojun 272:
1.2 itojun 273: /*
1.81 rpaulo 274: * make sure we don't have onion peering information into m_tag.
275: */
276: ip6_delaux(m);
277:
278: /*
1.44 itojun 279: * mbuf statistics
1.2 itojun 280: */
281: if (m->m_flags & M_EXT) {
282: if (m->m_next)
1.115 ! thorpej 283: ip6stat[IP6_STAT_MEXT2M]++;
1.2 itojun 284: else
1.115 ! thorpej 285: ip6stat[IP6_STAT_MEXT1]++;
1.2 itojun 286: } else {
1.115 ! thorpej 287: #define M2MMAX 32
1.2 itojun 288: if (m->m_next) {
1.9 itojun 289: if (m->m_flags & M_LOOP) {
1.115 ! thorpej 290: /*XXX*/ ip6stat[IP6_STAT_M2M + lo0ifp->if_index]++;
! 291: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX) {
! 292: ip6stat[IP6_STAT_M2M +
! 293: m->m_pkthdr.rcvif->if_index]++;
! 294: } else
! 295: ip6stat[IP6_STAT_M2M]++;
1.2 itojun 296: } else
1.115 ! thorpej 297: ip6stat[IP6_STAT_M1]++;
1.40 itojun 298: #undef M2MMAX
1.2 itojun 299: }
300:
1.9 itojun 301: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
1.115 ! thorpej 302: ip6stat[IP6_STAT_TOTAL]++;
1.9 itojun 303:
1.57 thorpej 304: /*
305: * If the IPv6 header is not aligned, slurp it up into a new
306: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 307: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 308: * IPv6 header is in the first mbuf of the chain.
309: */
1.97 christos 310: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 311: struct ifnet *inifp = m->m_pkthdr.rcvif;
312: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
313: (max_linkhdr + 3) & ~3)) == NULL) {
314: /* XXXJRT new stat, please */
1.115 ! thorpej 315: ip6stat[IP6_STAT_TOOSMALL]++;
1.57 thorpej 316: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
317: return;
318: }
319: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
320: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 321: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.115 ! thorpej 322: ip6stat[IP6_STAT_TOOSMALL]++;
1.9 itojun 323: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
324: return;
325: }
1.2 itojun 326: }
327:
328: ip6 = mtod(m, struct ip6_hdr *);
329:
330: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.115 ! thorpej 331: ip6stat[IP6_STAT_BADVERS]++;
1.9 itojun 332: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 333: goto bad;
334: }
1.15 darrenr 335:
1.98 liamjfoy 336: #if defined(IPSEC)
337: /* IPv6 fast forwarding is not compatible with IPsec. */
338: m->m_flags &= ~M_CANFASTFWD;
339: #else
340: /*
341: * Assume that we can create a fast-forward IP flow entry
342: * based on this packet.
343: */
344: m->m_flags |= M_CANFASTFWD;
345: #endif
346:
1.15 darrenr 347: #ifdef PFIL_HOOKS
348: /*
349: * Run through list of hooks for input packets. If there are any
350: * filters which require that additional packets in the flow are
351: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
352: * Note that filters must _never_ set this flag, as another filter
353: * in the list may have previously cleared it.
354: */
1.39 itojun 355: /*
356: * let ipfilter look at packet on the wire,
357: * not the decapsulated packet.
358: */
359: #ifdef IPSEC
1.42 itojun 360: if (!ipsec_getnhist(m))
1.94 degroote 361: #elif defined(FAST_IPSEC)
362: if (!ipsec_indone(m))
1.39 itojun 363: #else
364: if (1)
365: #endif
366: {
1.64 itojun 367: struct in6_addr odst;
368:
369: odst = ip6->ip6_dst;
1.39 itojun 370: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
371: PFIL_IN) != 0)
372: return;
373: if (m == NULL)
374: return;
375: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 376: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 377: }
1.15 darrenr 378: #endif /* PFIL_HOOKS */
379:
1.115 ! thorpej 380: ip6stat[IP6_STAT_NXTHIST + ip6->ip6_nxt]++;
1.2 itojun 381:
1.30 thorpej 382: #ifdef ALTQ
383: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
384: /* packet is dropped by traffic conditioner */
385: return;
1.9 itojun 386: }
387: #endif
388:
1.2 itojun 389: /*
1.44 itojun 390: * Check against address spoofing/corruption.
1.2 itojun 391: */
392: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
393: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 394: /*
395: * XXX: "badscope" is not very suitable for a multicast source.
396: */
1.115 ! thorpej 397: ip6stat[IP6_STAT_BADSCOPE]++;
1.9 itojun 398: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 399: goto bad;
400: }
1.13 itojun 401: /*
1.44 itojun 402: * The following check is not documented in specs. A malicious
403: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
404: * and bypass security checks (act as if it was from 127.0.0.1 by using
405: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 406: *
1.44 itojun 407: * This check chokes if we are in an SIIT cloud. As none of BSDs
408: * support IPv4-less kernel compilation, we cannot support SIIT
409: * environment at all. So, it makes more sense for us to reject any
410: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 411: * partial support for SIIT environment.
1.13 itojun 412: */
413: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
414: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.115 ! thorpej 415: ip6stat[IP6_STAT_BADSCOPE]++;
1.13 itojun 416: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
417: goto bad;
418: }
1.17 itojun 419: #if 0
1.13 itojun 420: /*
1.17 itojun 421: * Reject packets with IPv4 compatible addresses (auto tunnel).
422: *
423: * The code forbids auto tunnel relay case in RFC1933 (the check is
424: * stronger than RFC1933). We may want to re-enable it if mech-xx
425: * is revised to forbid relaying case.
1.13 itojun 426: */
427: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
428: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
1.115 ! thorpej 429: ip6stat[IP6_STAT_BADSCOPE]++;
1.13 itojun 430: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
431: goto bad;
432: }
433: #endif
1.35 itojun 434:
1.2 itojun 435: /*
1.82 yamt 436: * Disambiguate address scope zones (if there is ambiguity).
437: * We first make sure that the original source or destination address
438: * is not in our internal form for scoped addresses. Such addresses
439: * are not necessarily invalid spec-wise, but we cannot accept them due
440: * to the usage conflict.
441: * in6_setscope() then also checks and rejects the cases where src or
442: * dst are the loopback address and the receiving interface
443: * is not loopback.
444: */
1.88 bouyer 445: if (__predict_false(
446: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
447: goto bad;
448: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 449: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.115 ! thorpej 450: ip6stat[IP6_STAT_BADSCOPE]++;/*XXX*/
1.82 yamt 451: goto bad;
452: }
453: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
454: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
1.115 ! thorpej 455: ip6stat[IP6_STAT_BADSCOPE]++;
1.82 yamt 456: goto bad;
457: }
458:
459: /*
1.2 itojun 460: * Multicast check
461: */
462: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
463: struct in6_multi *in6m = 0;
1.9 itojun 464:
465: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 466: /*
467: * See if we belong to the destination multicast group on the
468: * arrival interface.
469: */
470: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
471: if (in6m)
472: ours = 1;
473: else if (!ip6_mrouter) {
1.115 ! thorpej 474: ip6stat[IP6_STAT_NOTMEMBER]++;
! 475: ip6stat[IP6_STAT_CANTFORWARD]++;
1.9 itojun 476: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 477: goto bad;
478: }
1.9 itojun 479: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 480: goto hbhcheck;
481: }
482:
1.105 dyoung 483: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
484:
1.2 itojun 485: /*
486: * Unicast check
487: */
1.105 dyoung 488: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
489: if (hit)
1.115 ! thorpej 490: ip6stat[IP6_STAT_FORWARD_CACHEHIT]++;
1.93 joerg 491: else
1.115 ! thorpej 492: ip6stat[IP6_STAT_FORWARD_CACHEMISS]++;
1.22 itojun 493:
1.109 dyoung 494: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 495:
496: /*
497: * Accept the packet if the forwarding interface to the destination
498: * according to the routing table is the loopback interface,
499: * unless the associated route has a gateway.
500: * Note that this approach causes to accept a packet if there is a
501: * route to the loopback interface for the destination of the packet.
502: * But we think it's even useful in some situations, e.g. when using
503: * a special daemon which wants to intercept the packet.
504: */
1.105 dyoung 505: if (rt != NULL &&
506: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
507: !(rt->rt_flags & RTF_CLONED) &&
1.2 itojun 508: #if 0
509: /*
510: * The check below is redundant since the comparison of
511: * the destination and the key of the rtentry has
512: * already done through looking up the routing table.
513: */
1.109 dyoung 514: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 515: #endif
1.105 dyoung 516: rt->rt_ifp->if_type == IFT_LOOP) {
517: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 518: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
519: m->m_flags |= M_ANYCAST6;
1.24 itojun 520: /*
521: * packets to a tentative, duplicated, or somehow invalid
522: * address must not be accepted.
523: */
1.2 itojun 524: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 525: /* this address is ready */
1.2 itojun 526: ours = 1;
1.9 itojun 527: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 528: goto hbhcheck;
529: } else {
1.24 itojun 530: /* address is not ready, so discard the packet. */
1.34 itojun 531: nd6log((LOG_INFO,
1.27 itojun 532: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 533: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 534: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 535:
536: goto bad;
1.2 itojun 537: }
538: }
539:
540: /*
1.55 itojun 541: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 542: */
543: #if defined(NFAITH) && 0 < NFAITH
544: if (ip6_keepfaith) {
1.105 dyoung 545: if (rt != NULL && rt->rt_ifp != NULL &&
546: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 547: /* XXX do we need more sanity checks? */
548: ours = 1;
1.105 dyoung 549: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 550: goto hbhcheck;
551: }
552: }
553: #endif
554:
555: #if 0
556: {
557: /*
558: * Last resort: check in6_ifaddr for incoming interface.
559: * The code is here until I update the "goto ours hack" code above
560: * working right.
561: */
562: struct ifaddr *ifa;
1.113 dyoung 563: IFADDR_FOREACH(ifa, m->m_pkthdr.rcvif) {
1.9 itojun 564: if (ifa->ifa_addr == NULL)
565: continue; /* just for safety */
566: if (ifa->ifa_addr->sa_family != AF_INET6)
567: continue;
568: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
569: ours = 1;
570: deliverifp = ifa->ifa_ifp;
1.2 itojun 571: goto hbhcheck;
572: }
573: }
1.9 itojun 574: }
1.2 itojun 575: #endif
576:
577: /*
578: * Now there is no reason to process the packet if it's not our own
579: * and we're not a router.
580: */
581: if (!ip6_forwarding) {
1.115 ! thorpej 582: ip6stat[IP6_STAT_CANTFORWARD]++;
1.9 itojun 583: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 584: goto bad;
585: }
586:
587: hbhcheck:
588: /*
1.81 rpaulo 589: * record address information into m_tag, if we don't have one yet.
590: * note that we are unable to record it, if the address is not listed
591: * as our interface address (e.g. multicast addresses, addresses
592: * within FAITH prefixes and such).
593: */
1.111 dyoung 594: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 595: struct in6_ifaddr *ia6;
596:
597: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.111 dyoung 598: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
599: /*
600: * XXX maybe we should drop the packet here,
601: * as we could not provide enough information
602: * to the upper layers.
603: */
1.81 rpaulo 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
1.83 rpaulo 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: */
1.115 ! thorpej 637: ip6stat[IP6_STAT_BADOPTIONS]++;
1.22 itojun 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,
1.97 christos 642: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 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) {
1.115 ! thorpej 648: ip6stat[IP6_STAT_TOOSHORT]++;
1.9 itojun 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) {
1.115 ! thorpej 670: ip6stat[IP6_STAT_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)) {
1.115 ! thorpej 695: ip6stat[IP6_STAT_CANTFORWARD]++;
1.2 itojun 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)) {
1.115 ! thorpej 721: ip6stat[IP6_STAT_BADSCOPE]++;
1.25 itojun 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
1.115 ! thorpej 737: ip6stat[IP6_STAT_DELIVERED]++;
1.9 itojun 738: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 739: nest = 0;
1.40 itojun 740:
1.104 yamt 741: rh_present = 0;
1.2 itojun 742: while (nxt != IPPROTO_DONE) {
743: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.115 ! thorpej 744: ip6stat[IP6_STAT_TOOMANYHDR]++;
1.104 yamt 745: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 746: goto bad;
747: }
1.8 itojun 748:
749: /*
750: * protection against faulty packet - there should be
751: * more sanity checks in header chain processing.
752: */
753: if (m->m_pkthdr.len < off) {
1.115 ! thorpej 754: ip6stat[IP6_STAT_TOOSHORT]++;
1.9 itojun 755: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 756: goto bad;
757: }
758:
1.104 yamt 759: if (nxt == IPPROTO_ROUTING) {
760: if (rh_present++) {
761: in6_ifstat_inc(m->m_pkthdr.rcvif,
762: ifs6_in_hdrerr);
1.115 ! thorpej 763: ip6stat[IP6_STAT_BADOPTIONS]++;
1.104 yamt 764: goto bad;
765: }
766: }
767:
1.37 itojun 768: #ifdef IPSEC
769: /*
770: * enforce IPsec policy checking if we are seeing last header.
771: * note that we do not visit this with protocols with pcb layer
772: * code - like udp/tcp/raw ip.
773: */
774: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
775: ipsec6_in_reject(m, NULL)) {
776: ipsec6stat.in_polvio++;
777: goto bad;
778: }
779: #endif
1.94 degroote 780: #ifdef FAST_IPSEC
781: /*
782: * enforce IPsec policy checking if we are seeing last header.
783: * note that we do not visit this with protocols with pcb layer
784: * code - like udp/tcp/raw ip.
785: */
786: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
787: /*
788: * Check if the packet has already had IPsec processing
789: * done. If so, then just pass it along. This tag gets
790: * set during AH, ESP, etc. input handling, before the
791: * packet is returned to the ip input queue for delivery.
792: */
793: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
794: s = splsoftnet();
795: if (mtag != NULL) {
796: tdbi = (struct tdb_ident *)(mtag + 1);
797: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
798: } else {
799: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
800: IP_FORWARDING, &error);
801: }
802: if (sp != NULL) {
803: /*
804: * Check security policy against packet attributes.
805: */
806: error = ipsec_in_reject(sp, m);
807: KEY_FREESP(&sp);
808: } else {
809: /* XXX error stat??? */
810: error = EINVAL;
811: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
812: }
813: splx(s);
814: if (error)
815: goto bad;
816: }
817: #endif /* FAST_IPSEC */
818:
1.56 itojun 819:
1.2 itojun 820: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
821: }
822: return;
823: bad:
824: m_freem(m);
825: }
826:
827: /*
1.81 rpaulo 828: * set/grab in6_ifaddr correspond to IPv6 destination address.
829: */
830: static struct m_tag *
1.112 dyoung 831: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 832: {
833: struct m_tag *mtag;
834:
835: mtag = ip6_addaux(m);
1.112 dyoung 836: if (mtag != NULL) {
837: struct ip6aux *ip6a;
838:
839: ip6a = (struct ip6aux *)(mtag + 1);
840: in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id);
841: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
842: ip6a->ip6a_flags = ia->ia6_flags;
843: }
1.81 rpaulo 844: return mtag; /* NULL if failed to set */
845: }
846:
1.112 dyoung 847: const struct ip6aux *
1.107 christos 848: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 849: {
850: struct m_tag *mtag;
851:
852: mtag = ip6_findaux(m);
1.112 dyoung 853: if (mtag != NULL)
854: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 855: else
856: return NULL;
857: }
858:
859: /*
1.2 itojun 860: * Hop-by-Hop options header processing. If a valid jumbo payload option is
861: * included, the real payload length will be stored in plenp.
1.107 christos 862: *
863: * rtalertp - XXX: should be stored more smart way
1.2 itojun 864: */
865: static int
1.107 christos 866: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
867: struct mbuf **mp, int *offp)
1.2 itojun 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) {
1.115 ! thorpej 877: ip6stat[IP6_STAT_TOOSHORT]++;
1.9 itojun 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) {
1.115 ! thorpej 884: ip6stat[IP6_STAT_TOOSHORT]++;
1.9 itojun 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
1.107 christos 911: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
912: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 913: {
914: struct ip6_hdr *ip6;
915: int optlen = 0;
916: u_int8_t *opt = opthead;
917: u_int16_t rtalert_val;
1.22 itojun 918: u_int32_t jumboplen;
1.55 itojun 919: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 920:
921: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 922: switch (*opt) {
923: case IP6OPT_PAD1:
924: optlen = 1;
925: break;
926: case IP6OPT_PADN:
927: if (hbhlen < IP6OPT_MINLEN) {
1.115 ! thorpej 928: ip6stat[IP6_STAT_TOOSMALL]++;
1.35 itojun 929: goto bad;
930: }
931: optlen = *(opt + 1) + 2;
932: break;
933: case IP6OPT_RTALERT:
934: /* XXX may need check for alignment */
935: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.115 ! thorpej 936: ip6stat[IP6_STAT_TOOSMALL]++;
1.35 itojun 937: goto bad;
938: }
939: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 940: /* XXX stat */
941: icmp6_error(m, ICMP6_PARAM_PROB,
942: ICMP6_PARAMPROB_HEADER,
943: erroff + opt + 1 - opthead);
944: return (-1);
1.35 itojun 945: }
946: optlen = IP6OPT_RTALERT_LEN;
1.97 christos 947: bcopy((void *)(opt + 2), (void *)&rtalert_val, 2);
1.35 itojun 948: *rtalertp = ntohs(rtalert_val);
949: break;
950: case IP6OPT_JUMBO:
1.22 itojun 951: /* XXX may need check for alignment */
952: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.115 ! thorpej 953: ip6stat[IP6_STAT_TOOSMALL]++;
1.22 itojun 954: goto bad;
955: }
1.35 itojun 956: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 957: /* XXX stat */
958: icmp6_error(m, ICMP6_PARAM_PROB,
959: ICMP6_PARAMPROB_HEADER,
960: erroff + opt + 1 - opthead);
961: return (-1);
1.35 itojun 962: }
1.22 itojun 963: optlen = IP6OPT_JUMBO_LEN;
964:
965: /*
966: * IPv6 packets that have non 0 payload length
1.35 itojun 967: * must not contain a jumbo payload option.
1.22 itojun 968: */
969: ip6 = mtod(m, struct ip6_hdr *);
970: if (ip6->ip6_plen) {
1.115 ! thorpej 971: ip6stat[IP6_STAT_BADOPTIONS]++;
1.22 itojun 972: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 973: ICMP6_PARAMPROB_HEADER,
974: erroff + opt - opthead);
975: return (-1);
1.22 itojun 976: }
1.2 itojun 977:
1.22 itojun 978: /*
979: * We may see jumbolen in unaligned location, so
980: * we'd need to perform bcopy().
981: */
982: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
983: jumboplen = (u_int32_t)htonl(jumboplen);
984:
985: #if 1
986: /*
987: * if there are multiple jumbo payload options,
988: * *plenp will be non-zero and the packet will be
989: * rejected.
990: * the behavior may need some debate in ipngwg -
991: * multiple options does not make sense, however,
992: * there's no explicit mention in specification.
993: */
994: if (*plenp != 0) {
1.115 ! thorpej 995: ip6stat[IP6_STAT_BADOPTIONS]++;
1.22 itojun 996: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 997: ICMP6_PARAMPROB_HEADER,
998: erroff + opt + 2 - opthead);
999: return (-1);
1.22 itojun 1000: }
1.8 itojun 1001: #endif
1.2 itojun 1002:
1.22 itojun 1003: /*
1004: * jumbo payload length must be larger than 65535.
1005: */
1006: if (jumboplen <= IPV6_MAXPACKET) {
1.115 ! thorpej 1007: ip6stat[IP6_STAT_BADOPTIONS]++;
1.22 itojun 1008: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1009: ICMP6_PARAMPROB_HEADER,
1010: erroff + opt + 2 - opthead);
1011: return (-1);
1.22 itojun 1012: }
1013: *plenp = jumboplen;
1014:
1015: break;
1.35 itojun 1016: default: /* unknown option */
1017: if (hbhlen < IP6OPT_MINLEN) {
1.115 ! thorpej 1018: ip6stat[IP6_STAT_TOOSMALL]++;
1.35 itojun 1019: goto bad;
1020: }
1.55 itojun 1021: optlen = ip6_unknown_opt(opt, m,
1022: erroff + opt - opthead);
1023: if (optlen == -1)
1024: return (-1);
1.35 itojun 1025: optlen += 2;
1026: break;
1.2 itojun 1027: }
1028: }
1029:
1.55 itojun 1030: return (0);
1.2 itojun 1031:
1032: bad:
1033: m_freem(m);
1.55 itojun 1034: return (-1);
1.2 itojun 1035: }
1036:
1037: /*
1038: * Unknown option processing.
1039: * The third argument `off' is the offset from the IPv6 header to the option,
1040: * which is necessary if the IPv6 header the and option header and IPv6 header
1041: * is not continuous in order to return an ICMPv6 error.
1042: */
1043: int
1.107 christos 1044: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1045: {
1046: struct ip6_hdr *ip6;
1047:
1.35 itojun 1048: switch (IP6OPT_TYPE(*optp)) {
1049: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1050: return ((int)*(optp + 1));
1.35 itojun 1051: case IP6OPT_TYPE_DISCARD: /* silently discard */
1052: m_freem(m);
1.58 itojun 1053: return (-1);
1.35 itojun 1054: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.115 ! thorpej 1055: ip6stat[IP6_STAT_BADOPTIONS]++;
1.35 itojun 1056: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1057: return (-1);
1.35 itojun 1058: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.115 ! thorpej 1059: ip6stat[IP6_STAT_BADOPTIONS]++;
1.35 itojun 1060: ip6 = mtod(m, struct ip6_hdr *);
1061: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1062: (m->m_flags & (M_BCAST|M_MCAST)))
1063: m_freem(m);
1064: else
1065: icmp6_error(m, ICMP6_PARAM_PROB,
1066: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1067: return (-1);
1.2 itojun 1068: }
1069:
1070: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1071: return (-1);
1.2 itojun 1072: }
1073:
1074: /*
1.9 itojun 1075: * Create the "control" list for this pcb.
1076: *
1077: * The routine will be called from upper layer handlers like tcp6_input().
1078: * Thus the routine assumes that the caller (tcp6_input) have already
1079: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1080: * very first mbuf on the mbuf chain.
1081: * We may want to add some infinite loop prevention or sanity checks for safety.
1082: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1083: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1084: */
1085: void
1.107 christos 1086: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1087: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1088: {
1.85 rpaulo 1089: #ifdef RFC2292
1090: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1091: #else
1092: #define IS2292(x, y) (y)
1093: #endif
1094:
1.9 itojun 1095: #ifdef SO_TIMESTAMP
1.2 itojun 1096: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1097: struct timeval tv;
1098:
1099: microtime(&tv);
1.97 christos 1100: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1101: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1102: if (*mp)
1103: mp = &(*mp)->m_next;
1104: }
1.9 itojun 1105: #endif
1.87 rpaulo 1106:
1107: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1108: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1109: return;
1110:
1.2 itojun 1111: /* RFC 2292 sec. 5 */
1.35 itojun 1112: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1113: struct in6_pktinfo pi6;
1.85 rpaulo 1114:
1.2 itojun 1115: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1116: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1117: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1118: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1119: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1120: sizeof(struct in6_pktinfo),
1121: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1122: if (*mp)
1123: mp = &(*mp)->m_next;
1124: }
1.85 rpaulo 1125:
1.2 itojun 1126: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1127: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1128:
1.97 christos 1129: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1130: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1131: if (*mp)
1132: mp = &(*mp)->m_next;
1133: }
1134:
1135: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1136: u_int32_t flowinfo;
1137: int tclass;
1138:
1139: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1140: flowinfo >>= 20;
1141:
1142: tclass = flowinfo & 0xff;
1.97 christos 1143: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1144: IPV6_TCLASS, IPPROTO_IPV6);
1145:
1.2 itojun 1146: if (*mp)
1147: mp = &(*mp)->m_next;
1148: }
1149:
1150: /*
1.75 itojun 1151: * IPV6_HOPOPTS socket option. Recall that we required super-user
1152: * privilege for the option (see ip6_ctloutput), but it might be too
1153: * strict, since there might be some hop-by-hop options which can be
1154: * returned to normal user.
1.85 rpaulo 1155: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1156: */
1.75 itojun 1157: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1158: /*
1159: * Check if a hop-by-hop options header is contatined in the
1160: * received packet, and if so, store the options as ancillary
1161: * data. Note that a hop-by-hop options header must be
1162: * just after the IPv6 header, which fact is assured through
1163: * the IPv6 input processing.
1164: */
1.78 christos 1165: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1166: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1167: struct ip6_hbh *hbh;
1168: int hbhlen;
1.62 itojun 1169: struct mbuf *ext;
1.9 itojun 1170:
1.62 itojun 1171: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1172: xip6->ip6_nxt);
1.62 itojun 1173: if (ext == NULL) {
1.115 ! thorpej 1174: ip6stat[IP6_STAT_TOOSHORT]++;
1.9 itojun 1175: return;
1176: }
1.62 itojun 1177: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1178: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1179: if (hbhlen != ext->m_len) {
1180: m_freem(ext);
1.115 ! thorpej 1181: ip6stat[IP6_STAT_TOOSHORT]++;
1.9 itojun 1182: return;
1183: }
1.2 itojun 1184:
1185: /*
1186: * XXX: We copy whole the header even if a jumbo
1187: * payload option is included, which option is to
1188: * be removed before returning in the RFC 2292.
1.85 rpaulo 1189: * Note: this constraint is removed in RFC3542.
1.2 itojun 1190: */
1.97 christos 1191: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1192: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1193: IPPROTO_IPV6);
1.2 itojun 1194: if (*mp)
1195: mp = &(*mp)->m_next;
1.62 itojun 1196: m_freem(ext);
1.2 itojun 1197: }
1198: }
1199:
1200: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1201: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1202: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1203: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1204:
1205: /*
1206: * Search for destination options headers or routing
1207: * header(s) through the header chain, and stores each
1208: * header as ancillary data.
1209: * Note that the order of the headers remains in
1210: * the chain of ancillary data.
1211: */
1.86 rpaulo 1212: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1213: struct ip6_ext *ip6e = NULL;
1.9 itojun 1214: int elen;
1.62 itojun 1215: struct mbuf *ext = NULL;
1.9 itojun 1216:
1.62 itojun 1217: /*
1218: * if it is not an extension header, don't try to
1219: * pull it from the chain.
1220: */
1221: switch (nxt) {
1222: case IPPROTO_DSTOPTS:
1223: case IPPROTO_ROUTING:
1224: case IPPROTO_HOPOPTS:
1225: case IPPROTO_AH: /* is it possible? */
1226: break;
1227: default:
1228: goto loopend;
1229: }
1230:
1231: ext = ip6_pullexthdr(m, off, nxt);
1232: if (ext == NULL) {
1.115 ! thorpej 1233: ip6stat[IP6_STAT_TOOSHORT]++;
1.9 itojun 1234: return;
1235: }
1.62 itojun 1236: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1237: if (nxt == IPPROTO_AH)
1238: elen = (ip6e->ip6e_len + 2) << 2;
1239: else
1240: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1241: if (elen != ext->m_len) {
1242: m_freem(ext);
1.115 ! thorpej 1243: ip6stat[IP6_STAT_TOOSHORT]++;
1.9 itojun 1244: return;
1245: }
1.57 thorpej 1246: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1247:
1.35 itojun 1248: switch (nxt) {
1.62 itojun 1249: case IPPROTO_DSTOPTS:
1.35 itojun 1250: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1251: break;
1252:
1.97 christos 1253: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1254: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1255: IPPROTO_IPV6);
1.35 itojun 1256: if (*mp)
1257: mp = &(*mp)->m_next;
1258: break;
1259:
1260: case IPPROTO_ROUTING:
1261: if (!in6p->in6p_flags & IN6P_RTHDR)
1262: break;
1263:
1.97 christos 1264: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1265: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1266: IPPROTO_IPV6);
1.35 itojun 1267: if (*mp)
1268: mp = &(*mp)->m_next;
1269: break;
1270:
1.62 itojun 1271: case IPPROTO_HOPOPTS:
1272: case IPPROTO_AH: /* is it possible? */
1273: break;
1274:
1.35 itojun 1275: default:
1276: /*
1.62 itojun 1277: * other cases have been filtered in the above.
1278: * none will visit this case. here we supply
1279: * the code just in case (nxt overwritten or
1280: * other cases).
1.35 itojun 1281: */
1.62 itojun 1282: m_freem(ext);
1.35 itojun 1283: goto loopend;
1284:
1.2 itojun 1285: }
1286:
1287: /* proceed with the next header. */
1.9 itojun 1288: off += elen;
1.2 itojun 1289: nxt = ip6e->ip6e_nxt;
1.62 itojun 1290: ip6e = NULL;
1291: m_freem(ext);
1292: ext = NULL;
1.2 itojun 1293: }
1294: loopend:
1.62 itojun 1295: ;
1.2 itojun 1296: }
1.62 itojun 1297: }
1.85 rpaulo 1298: #undef IS2292
1299:
1300:
1301: void
1.95 dyoung 1302: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1303: uint32_t *mtu)
1.85 rpaulo 1304: {
1305: struct socket *so;
1306: struct mbuf *m_mtu;
1307: struct ip6_mtuinfo mtuctl;
1308:
1309: so = in6p->in6p_socket;
1310:
1311: if (mtu == NULL)
1312: return;
1313:
1314: #ifdef DIAGNOSTIC
1315: if (so == NULL) /* I believe this is impossible */
1316: panic("ip6_notify_pmtu: socket is NULL");
1317: #endif
1318:
1319: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1320: mtuctl.ip6m_mtu = *mtu;
1321: mtuctl.ip6m_addr = *dst;
1322: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1323: return;
1324:
1.97 christos 1325: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1326: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1327: return;
1328:
1.95 dyoung 1329: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1330: == 0) {
1331: m_freem(m_mtu);
1332: /* XXX: should count statistics */
1333: } else
1334: sorwakeup(so);
1335:
1336: return;
1337: }
1.62 itojun 1338:
1339: /*
1340: * pull single extension header from mbuf chain. returns single mbuf that
1341: * contains the result, or NULL on error.
1342: */
1343: static struct mbuf *
1.107 christos 1344: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1345: {
1346: struct ip6_ext ip6e;
1347: size_t elen;
1348: struct mbuf *n;
1349:
1350: #ifdef DIAGNOSTIC
1351: switch (nxt) {
1352: case IPPROTO_DSTOPTS:
1353: case IPPROTO_ROUTING:
1354: case IPPROTO_HOPOPTS:
1355: case IPPROTO_AH: /* is it possible? */
1356: break;
1357: default:
1358: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1359: }
1.62 itojun 1360: #endif
1.2 itojun 1361:
1.97 christos 1362: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1363: if (nxt == IPPROTO_AH)
1364: elen = (ip6e.ip6e_len + 2) << 2;
1365: else
1366: elen = (ip6e.ip6e_len + 1) << 3;
1367:
1368: MGET(n, M_DONTWAIT, MT_DATA);
1369: if (n && elen >= MLEN) {
1370: MCLGET(n, M_DONTWAIT);
1371: if ((n->m_flags & M_EXT) == 0) {
1372: m_free(n);
1373: n = NULL;
1374: }
1375: }
1376: if (!n)
1377: return NULL;
1378:
1379: n->m_len = 0;
1380: if (elen >= M_TRAILINGSPACE(n)) {
1381: m_free(n);
1382: return NULL;
1383: }
1384:
1.97 christos 1385: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1386: n->m_len = elen;
1387: return n;
1.2 itojun 1388: }
1389:
1390: /*
1391: * Get pointer to the previous header followed by the header
1392: * currently processed.
1393: * XXX: This function supposes that
1394: * M includes all headers,
1395: * the next header field and the header length field of each header
1396: * are valid, and
1397: * the sum of each header length equals to OFF.
1398: * Because of these assumptions, this function must be called very
1399: * carefully. Moreover, it will not be used in the near future when
1400: * we develop `neater' mechanism to process extension headers.
1401: */
1.58 itojun 1402: u_int8_t *
1.107 christos 1403: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1404: {
1405: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1406:
1407: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1408: return (&ip6->ip6_nxt);
1.2 itojun 1409: else {
1410: int len, nxt;
1411: struct ip6_ext *ip6e = NULL;
1412:
1413: nxt = ip6->ip6_nxt;
1414: len = sizeof(struct ip6_hdr);
1415: while (len < off) {
1.97 christos 1416: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1417:
1.35 itojun 1418: switch (nxt) {
1.2 itojun 1419: case IPPROTO_FRAGMENT:
1420: len += sizeof(struct ip6_frag);
1421: break;
1422: case IPPROTO_AH:
1423: len += (ip6e->ip6e_len + 2) << 2;
1424: break;
1425: default:
1426: len += (ip6e->ip6e_len + 1) << 3;
1427: break;
1428: }
1429: nxt = ip6e->ip6e_nxt;
1430: }
1431: if (ip6e)
1.58 itojun 1432: return (&ip6e->ip6e_nxt);
1.2 itojun 1433: else
1434: return NULL;
1.18 itojun 1435: }
1436: }
1437:
1438: /*
1439: * get next header offset. m will be retained.
1440: */
1441: int
1.107 christos 1442: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1443: {
1444: struct ip6_hdr ip6;
1445: struct ip6_ext ip6e;
1446: struct ip6_frag fh;
1447:
1448: /* just in case */
1449: if (m == NULL)
1450: panic("ip6_nexthdr: m == NULL");
1451: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1452: return -1;
1453:
1454: switch (proto) {
1455: case IPPROTO_IPV6:
1.83 rpaulo 1456: /* do not chase beyond intermediate IPv6 headers */
1457: if (off != 0)
1458: return -1;
1.18 itojun 1459: if (m->m_pkthdr.len < off + sizeof(ip6))
1460: return -1;
1.97 christos 1461: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1462: if (nxtp)
1463: *nxtp = ip6.ip6_nxt;
1464: off += sizeof(ip6);
1465: return off;
1466:
1467: case IPPROTO_FRAGMENT:
1468: /*
1469: * terminate parsing if it is not the first fragment,
1470: * it does not make sense to parse through it.
1471: */
1472: if (m->m_pkthdr.len < off + sizeof(fh))
1473: return -1;
1.97 christos 1474: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1475: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1476: return -1;
1477: if (nxtp)
1478: *nxtp = fh.ip6f_nxt;
1479: off += sizeof(struct ip6_frag);
1480: return off;
1481:
1482: case IPPROTO_AH:
1483: if (m->m_pkthdr.len < off + sizeof(ip6e))
1484: return -1;
1.97 christos 1485: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1486: if (nxtp)
1487: *nxtp = ip6e.ip6e_nxt;
1488: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1489: if (m->m_pkthdr.len < off)
1490: return -1;
1.18 itojun 1491: return off;
1492:
1493: case IPPROTO_HOPOPTS:
1494: case IPPROTO_ROUTING:
1495: case IPPROTO_DSTOPTS:
1496: if (m->m_pkthdr.len < off + sizeof(ip6e))
1497: return -1;
1.97 christos 1498: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1499: if (nxtp)
1500: *nxtp = ip6e.ip6e_nxt;
1501: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1502: if (m->m_pkthdr.len < off)
1503: return -1;
1.18 itojun 1504: return off;
1505:
1506: case IPPROTO_NONE:
1507: case IPPROTO_ESP:
1508: case IPPROTO_IPCOMP:
1509: /* give up */
1510: return -1;
1511:
1512: default:
1513: return -1;
1514: }
1515: }
1516:
1517: /*
1518: * get offset for the last header in the chain. m will be kept untainted.
1519: */
1520: int
1.107 christos 1521: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1522: {
1523: int newoff;
1524: int nxt;
1525:
1526: if (!nxtp) {
1527: nxt = -1;
1528: nxtp = &nxt;
1529: }
1.86 rpaulo 1530: for (;;) {
1.18 itojun 1531: newoff = ip6_nexthdr(m, off, proto, nxtp);
1532: if (newoff < 0)
1533: return off;
1534: else if (newoff < off)
1535: return -1; /* invalid */
1536: else if (newoff == off)
1537: return newoff;
1538:
1539: off = newoff;
1540: proto = *nxtp;
1.2 itojun 1541: }
1542: }
1543:
1.81 rpaulo 1544: struct m_tag *
1.107 christos 1545: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1546: {
1547: struct m_tag *mtag;
1548:
1549: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1550: if (!mtag) {
1551: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1552: M_NOWAIT);
1553: if (mtag) {
1554: m_tag_prepend(m, mtag);
1555: bzero(mtag + 1, sizeof(struct ip6aux));
1556: }
1557: }
1558: return mtag;
1559: }
1560:
1561: struct m_tag *
1.107 christos 1562: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1563: {
1564: struct m_tag *mtag;
1565:
1566: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1567: return mtag;
1568: }
1569:
1570: void
1.107 christos 1571: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1572: {
1573: struct m_tag *mtag;
1574:
1575: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1576: if (mtag)
1577: m_tag_delete(m, mtag);
1578: }
1579:
1.98 liamjfoy 1580: #ifdef GATEWAY
1581: /*
1582: * sysctl helper routine for net.inet.ip6.maxflows. Since
1583: * we could reduce this value, call ip6flow_reap();
1584: */
1585: static int
1.101 liamjfoy 1586: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1587: {
1588: int s;
1589:
1590: s = sysctl_lookup(SYSCTLFN_CALL(rnode));
1.100 liamjfoy 1591: if (s || newp == NULL)
1.98 liamjfoy 1592: return (s);
1593:
1594: s = splsoftnet();
1595: ip6flow_reap(0);
1596: splx(s);
1597:
1598: return (0);
1599: }
1.99 liamjfoy 1600:
1601: static int
1602: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1603: {
1604: int error, tmp;
1605: struct sysctlnode node;
1606:
1607: node = *rnode;
1608: tmp = ip6_hashsize;
1609: node.sysctl_data = &tmp;
1610: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1611: if (error || newp == NULL)
1612: return (error);
1613:
1614: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1615: /*
1616: * Can only fail due to malloc()
1617: */
1618: if (ip6flow_invalidate_all(tmp))
1619: return ENOMEM;
1620: } else {
1621: /*
1622: * EINVAL if not a power of 2
1623: */
1624: return EINVAL;
1625: }
1626:
1627: return (0);
1628: }
1.98 liamjfoy 1629: #endif /* GATEWAY */
1630:
1.2 itojun 1631: /*
1632: * System control for IP6
1633: */
1634:
1635: u_char inet6ctlerrmap[PRC_NCMDS] = {
1636: 0, 0, 0, 0,
1637: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1638: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1639: EMSGSIZE, EHOSTUNREACH, 0, 0,
1640: 0, 0, 0, 0,
1641: ENOPROTOOPT
1642: };
1643:
1.70 atatat 1644: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1645: {
1.85 rpaulo 1646: #ifdef RFC2292
1647: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1648: #else
1649: #define IS2292(x, y) (y)
1650: #endif
1.26 itojun 1651:
1.73 atatat 1652: sysctl_createv(clog, 0, NULL, NULL,
1653: CTLFLAG_PERMANENT,
1.70 atatat 1654: CTLTYPE_NODE, "net", NULL,
1655: NULL, 0, NULL, 0,
1656: CTL_NET, CTL_EOL);
1.73 atatat 1657: sysctl_createv(clog, 0, NULL, NULL,
1658: CTLFLAG_PERMANENT,
1.74 atatat 1659: CTLTYPE_NODE, "inet6",
1660: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1661: NULL, 0, NULL, 0,
1662: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1663: sysctl_createv(clog, 0, NULL, NULL,
1664: CTLFLAG_PERMANENT,
1.74 atatat 1665: CTLTYPE_NODE, "ip6",
1666: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1667: NULL, 0, NULL, 0,
1668: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1669:
1.73 atatat 1670: sysctl_createv(clog, 0, NULL, NULL,
1671: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1672: CTLTYPE_INT, "forwarding",
1673: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1674: NULL, 0, &ip6_forwarding, 0,
1675: CTL_NET, PF_INET6, IPPROTO_IPV6,
1676: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1677: sysctl_createv(clog, 0, NULL, NULL,
1678: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1679: CTLTYPE_INT, "redirect",
1680: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1681: NULL, 0, &ip6_sendredirects, 0,
1682: CTL_NET, PF_INET6, IPPROTO_IPV6,
1683: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1684: sysctl_createv(clog, 0, NULL, NULL,
1685: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1686: CTLTYPE_INT, "hlim",
1687: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1688: NULL, 0, &ip6_defhlim, 0,
1689: CTL_NET, PF_INET6, IPPROTO_IPV6,
1690: IPV6CTL_DEFHLIM, CTL_EOL);
1691: #ifdef notyet
1.73 atatat 1692: sysctl_createv(clog, 0, NULL, NULL,
1693: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1694: CTLTYPE_INT, "mtu", NULL,
1695: NULL, 0, &, 0,
1696: CTL_NET, PF_INET6, IPPROTO_IPV6,
1697: IPV6CTL_DEFMTU, CTL_EOL);
1698: #endif
1699: #ifdef __no_idea__
1.73 atatat 1700: sysctl_createv(clog, 0, NULL, NULL,
1701: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1702: CTLTYPE_INT, "forwsrcrt", NULL,
1703: NULL, 0, &?, 0,
1704: CTL_NET, PF_INET6, IPPROTO_IPV6,
1705: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1706: sysctl_createv(clog, 0, NULL, NULL,
1707: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1708: CTLTYPE_STRUCT, "mrtstats", NULL,
1709: NULL, 0, &?, sizeof(?),
1710: CTL_NET, PF_INET6, IPPROTO_IPV6,
1711: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1712: sysctl_createv(clog, 0, NULL, NULL,
1713: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1714: CTLTYPE_?, "mrtproto", NULL,
1715: NULL, 0, &?, sizeof(?),
1716: CTL_NET, PF_INET6, IPPROTO_IPV6,
1717: IPV6CTL_MRTPROTO, CTL_EOL);
1718: #endif
1.73 atatat 1719: sysctl_createv(clog, 0, NULL, NULL,
1720: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1721: CTLTYPE_INT, "maxfragpackets",
1722: SYSCTL_DESCR("Maximum number of fragments to buffer "
1723: "for reassembly"),
1.70 atatat 1724: NULL, 0, &ip6_maxfragpackets, 0,
1725: CTL_NET, PF_INET6, IPPROTO_IPV6,
1726: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1727: #ifdef __no_idea__
1.73 atatat 1728: sysctl_createv(clog, 0, NULL, NULL,
1729: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1730: CTLTYPE_INT, "sourcecheck", NULL,
1731: NULL, 0, &?, 0,
1732: CTL_NET, PF_INET6, IPPROTO_IPV6,
1733: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1734: sysctl_createv(clog, 0, NULL, NULL,
1735: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1736: CTLTYPE_INT, "sourcecheck_logint", NULL,
1737: NULL, 0, &?, 0,
1738: CTL_NET, PF_INET6, IPPROTO_IPV6,
1739: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1740: #endif
1.73 atatat 1741: sysctl_createv(clog, 0, NULL, NULL,
1742: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1743: CTLTYPE_INT, "accept_rtadv",
1744: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1745: NULL, 0, &ip6_accept_rtadv, 0,
1746: CTL_NET, PF_INET6, IPPROTO_IPV6,
1747: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1748: sysctl_createv(clog, 0, NULL, NULL,
1749: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1750: CTLTYPE_INT, "keepfaith",
1751: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1752: NULL, 0, &ip6_keepfaith, 0,
1753: CTL_NET, PF_INET6, IPPROTO_IPV6,
1754: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1755: sysctl_createv(clog, 0, NULL, NULL,
1756: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1757: CTLTYPE_INT, "log_interval",
1758: SYSCTL_DESCR("Minumum interval between logging "
1759: "unroutable packets"),
1.70 atatat 1760: NULL, 0, &ip6_log_interval, 0,
1761: CTL_NET, PF_INET6, IPPROTO_IPV6,
1762: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1763: sysctl_createv(clog, 0, NULL, NULL,
1764: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1765: CTLTYPE_INT, "hdrnestlimit",
1766: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1767: NULL, 0, &ip6_hdrnestlimit, 0,
1768: CTL_NET, PF_INET6, IPPROTO_IPV6,
1769: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1770: sysctl_createv(clog, 0, NULL, NULL,
1771: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1772: CTLTYPE_INT, "dad_count",
1773: SYSCTL_DESCR("Number of Duplicate Address Detection "
1774: "probes to send"),
1.70 atatat 1775: NULL, 0, &ip6_dad_count, 0,
1776: CTL_NET, PF_INET6, IPPROTO_IPV6,
1777: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1778: sysctl_createv(clog, 0, NULL, NULL,
1779: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1780: CTLTYPE_INT, "auto_flowlabel",
1781: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1782: NULL, 0, &ip6_auto_flowlabel, 0,
1783: CTL_NET, PF_INET6, IPPROTO_IPV6,
1784: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1785: sysctl_createv(clog, 0, NULL, NULL,
1786: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1787: CTLTYPE_INT, "defmcasthlim",
1788: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1789: NULL, 0, &ip6_defmcasthlim, 0,
1790: CTL_NET, PF_INET6, IPPROTO_IPV6,
1791: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1792: #if NGIF > 0
1.73 atatat 1793: sysctl_createv(clog, 0, NULL, NULL,
1794: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1795: CTLTYPE_INT, "gifhlim",
1796: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1797: NULL, 0, &ip6_gif_hlim, 0,
1798: CTL_NET, PF_INET6, IPPROTO_IPV6,
1799: IPV6CTL_GIF_HLIM, CTL_EOL);
1800: #endif /* NGIF */
1.73 atatat 1801: sysctl_createv(clog, 0, NULL, NULL,
1802: CTLFLAG_PERMANENT,
1.74 atatat 1803: CTLTYPE_STRING, "kame_version",
1804: SYSCTL_DESCR("KAME Version"),
1.78 christos 1805: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1806: CTL_NET, PF_INET6, IPPROTO_IPV6,
1807: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1808: sysctl_createv(clog, 0, NULL, NULL,
1809: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1810: CTLTYPE_INT, "use_deprecated",
1811: SYSCTL_DESCR("Allow use of deprecated addresses as "
1812: "source addresses"),
1.70 atatat 1813: NULL, 0, &ip6_use_deprecated, 0,
1814: CTL_NET, PF_INET6, IPPROTO_IPV6,
1815: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1816: sysctl_createv(clog, 0, NULL, NULL,
1817: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1818: CTLTYPE_INT, "rr_prune", NULL,
1819: NULL, 0, &ip6_rr_prune, 0,
1820: CTL_NET, PF_INET6, IPPROTO_IPV6,
1821: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1822: sysctl_createv(clog, 0, NULL, NULL,
1823: CTLFLAG_PERMANENT
1.70 atatat 1824: #ifndef INET6_BINDV6ONLY
1.73 atatat 1825: |CTLFLAG_READWRITE,
1.70 atatat 1826: #endif
1.74 atatat 1827: CTLTYPE_INT, "v6only",
1828: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1829: "to PF_INET sockets"),
1.70 atatat 1830: NULL, 0, &ip6_v6only, 0,
1831: CTL_NET, PF_INET6, IPPROTO_IPV6,
1832: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1833: sysctl_createv(clog, 0, NULL, NULL,
1834: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1835: CTLTYPE_INT, "anonportmin",
1836: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1837: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1838: CTL_NET, PF_INET6, IPPROTO_IPV6,
1839: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1840: sysctl_createv(clog, 0, NULL, NULL,
1841: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1842: CTLTYPE_INT, "anonportmax",
1843: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1844: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1845: CTL_NET, PF_INET6, IPPROTO_IPV6,
1846: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1847: #ifndef IPNOPRIVPORTS
1.73 atatat 1848: sysctl_createv(clog, 0, NULL, NULL,
1849: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1850: CTLTYPE_INT, "lowportmin",
1851: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1852: "to assign"),
1.70 atatat 1853: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1854: CTL_NET, PF_INET6, IPPROTO_IPV6,
1855: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1856: sysctl_createv(clog, 0, NULL, NULL,
1857: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1858: CTLTYPE_INT, "lowportmax",
1859: SYSCTL_DESCR("Highest privileged ephemeral port number "
1860: "to assign"),
1.70 atatat 1861: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1862: CTL_NET, PF_INET6, IPPROTO_IPV6,
1863: IPV6CTL_LOWPORTMAX, CTL_EOL);
1864: #endif /* IPNOPRIVPORTS */
1.73 atatat 1865: sysctl_createv(clog, 0, NULL, NULL,
1866: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1867: CTLTYPE_INT, "use_tempaddr",
1868: SYSCTL_DESCR("Use temporary address"),
1869: NULL, 0, &ip6_use_tempaddr, 0,
1870: CTL_NET, PF_INET6, IPPROTO_IPV6,
1871: CTL_CREATE, CTL_EOL);
1872: sysctl_createv(clog, 0, NULL, NULL,
1873: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1874: CTLTYPE_INT, "temppltime",
1875: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1876: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1877: CTL_NET, PF_INET6, IPPROTO_IPV6,
1878: CTL_CREATE, CTL_EOL);
1879: sysctl_createv(clog, 0, NULL, NULL,
1880: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1881: CTLTYPE_INT, "tempvltime",
1882: SYSCTL_DESCR("valid lifetime of a temporary address"),
1883: NULL, 0, &ip6_temp_valid_lifetime, 0,
1884: CTL_NET, PF_INET6, IPPROTO_IPV6,
1885: CTL_CREATE, CTL_EOL);
1886: sysctl_createv(clog, 0, NULL, NULL,
1887: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1888: CTLTYPE_INT, "maxfrags",
1889: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1890: NULL, 0, &ip6_maxfrags, 0,
1891: CTL_NET, PF_INET6, IPPROTO_IPV6,
1892: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1893: sysctl_createv(clog, 0, NULL, NULL,
1894: CTLFLAG_PERMANENT,
1895: CTLTYPE_STRUCT, "stats",
1896: SYSCTL_DESCR("IPv6 statistics"),
1.115 ! thorpej 1897: NULL, 0, ip6stat, sizeof(ip6stat),
1.79 rpaulo 1898: CTL_NET, PF_INET6, IPPROTO_IPV6,
1899: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1900: sysctl_createv(clog, 0, NULL, NULL,
1901: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1902: CTLTYPE_INT, "use_defaultzone",
1903: SYSCTL_DESCR("Whether to use the default scope zones"),
1904: NULL, 0, &ip6_use_defzone, 0,
1905: CTL_NET, PF_INET6, IPPROTO_IPV6,
1906: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1907: sysctl_createv(clog, 0, NULL, NULL,
1908: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1909: CTLTYPE_INT, "mcast_pmtu",
1910: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1911: NULL, 0, &ip6_mcast_pmtu, 0,
1912: CTL_NET, PF_INET6, IPPROTO_IPV6,
1913: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1914: #ifdef GATEWAY
1915: sysctl_createv(clog, 0, NULL, NULL,
1916: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1917: CTLTYPE_INT, "maxflows",
1918: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.101 liamjfoy 1919: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1920: CTL_NET, PF_INET6, IPPROTO_IPV6,
1921: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1922: sysctl_createv(clog, 0, NULL, NULL,
1923: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1924: CTLTYPE_INT, "hashsize",
1925: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1926: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1927: CTL_NET, PF_INET6, IPPROTO_IPV6,
1928: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1929: #endif
1.2 itojun 1930: }
CVSweb <webmaster@jp.NetBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to ip6_input.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [cvs.NetBSD.org] / src / sys / netinet6