Annotation of src/sys/netinet6/ip6_input.c, Revision 1.98.2.2
1.98.2.2! ad 1: /* $NetBSD: ip6_input.c,v 1.98.2.1 2007/04/10 13:26:51 ad Exp $ */
1.40 itojun 2: /* $KAME: ip6_input.c,v 1.188 2001/03/29 05:34:31 itojun Exp $ */
1.3 thorpej 3:
1.2 itojun 4: /*
5: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6: * All rights reserved.
1.21 itojun 7: *
1.2 itojun 8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the project nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
1.21 itojun 19: *
1.2 itojun 20: * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: /*
34: * Copyright (c) 1982, 1986, 1988, 1993
35: * The Regents of the University of California. All rights reserved.
36: *
37: * Redistribution and use in source and binary forms, with or without
38: * modification, are permitted provided that the following conditions
39: * are met:
40: * 1. Redistributions of source code must retain the above copyright
41: * notice, this list of conditions and the following disclaimer.
42: * 2. Redistributions in binary form must reproduce the above copyright
43: * notice, this list of conditions and the following disclaimer in the
44: * documentation and/or other materials provided with the distribution.
1.65 agc 45: * 3. Neither the name of the University nor the names of its contributors
1.2 itojun 46: * may be used to endorse or promote products derived from this software
47: * without specific prior written permission.
48: *
49: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59: * SUCH DAMAGE.
60: *
61: * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
62: */
1.48 lukem 63:
64: #include <sys/cdefs.h>
1.98.2.2! ad 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.98.2.1 2007/04/10 13:26:51 ad Exp $");
1.2 itojun 66:
67: #include "opt_inet.h"
1.85 rpaulo 68: #include "opt_inet6.h"
1.4 thorpej 69: #include "opt_ipsec.h"
1.15 darrenr 70: #include "opt_pfil_hooks.h"
1.2 itojun 71:
72: #include <sys/param.h>
73: #include <sys/systm.h>
74: #include <sys/malloc.h>
75: #include <sys/mbuf.h>
76: #include <sys/domain.h>
77: #include <sys/protosw.h>
78: #include <sys/socket.h>
79: #include <sys/socketvar.h>
80: #include <sys/errno.h>
81: #include <sys/time.h>
82: #include <sys/kernel.h>
83: #include <sys/syslog.h>
84: #include <sys/proc.h>
1.46 simonb 85: #include <sys/sysctl.h>
1.2 itojun 86:
87: #include <net/if.h>
88: #include <net/if_types.h>
89: #include <net/if_dl.h>
90: #include <net/route.h>
91: #include <net/netisr.h>
1.15 darrenr 92: #ifdef PFIL_HOOKS
93: #include <net/pfil.h>
94: #endif
1.2 itojun 95:
96: #include <netinet/in.h>
1.9 itojun 97: #include <netinet/in_systm.h>
98: #ifdef INET
99: #include <netinet/ip.h>
100: #include <netinet/ip_icmp.h>
1.45 itojun 101: #endif /* INET */
1.14 itojun 102: #include <netinet/ip6.h>
1.2 itojun 103: #include <netinet6/in6_var.h>
1.11 itojun 104: #include <netinet6/ip6_var.h>
1.2 itojun 105: #include <netinet6/in6_pcb.h>
1.14 itojun 106: #include <netinet/icmp6.h>
1.81 rpaulo 107: #include <netinet6/scope6_var.h>
1.2 itojun 108: #include <netinet6/in6_ifattach.h>
109: #include <netinet6/nd6.h>
110:
1.37 itojun 111: #ifdef IPSEC
112: #include <netinet6/ipsec.h>
113: #endif
114:
1.94 degroote 115: #ifdef FAST_IPSEC
116: #include <netipsec/ipsec.h>
117: #include <netipsec/ipsec6.h>
118: #include <netipsec/key.h>
119: #endif /* FAST_IPSEC */
120:
1.2 itojun 121: #include <netinet6/ip6protosw.h>
122:
123: #include "faith.h"
124: #include "gif.h"
1.50 itojun 125:
126: #if NGIF > 0
127: #include <netinet6/in6_gif.h>
128: #endif
1.2 itojun 129:
1.9 itojun 130: #include <net/net_osdep.h>
131:
1.2 itojun 132: extern struct domain inet6domain;
133:
134: u_char ip6_protox[IPPROTO_MAX];
135: static int ip6qmaxlen = IFQ_MAXLEN;
136: struct in6_ifaddr *in6_ifaddr;
137: struct ifqueue ip6intrq;
138:
1.83 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);
1.98 liamjfoy 185: #ifdef GATEWAY
1.98.2.1 ad 186: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 187: #endif
1.29 thorpej 188:
189: #ifdef PFIL_HOOKS
190: /* Register our Packet Filter hook. */
1.33 thorpej 191: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
192: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 193: i = pfil_head_register(&inet6_pfil_hook);
194: if (i != 0)
195: printf("ip6_init: WARNING: unable to register pfil hook, "
196: "error %d\n", i);
197: #endif /* PFIL_HOOKS */
1.2 itojun 198: }
199:
200: static void
1.90 christos 201: ip6_init2(void *dummy)
1.2 itojun 202: {
203:
204: /* nd6_timer_init */
1.19 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:
1.98.2.2! ad 240: extern struct route ip6_forward_rt;
1.2 itojun 241:
242: void
1.96 dyoung 243: ip6_input(struct mbuf *m)
1.2 itojun 244: {
1.9 itojun 245: struct ip6_hdr *ip6;
1.98.2.2! ad 246: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 247: u_int32_t plen;
1.5 itojun 248: u_int32_t rtalert = ~0;
1.98.2.2! ad 249: int nxt, ours = 0, rh_present = 0;
1.9 itojun 250: struct ifnet *deliverifp = NULL;
1.64 itojun 251: int srcrt = 0;
1.98.2.2! ad 252: const struct rtentry *rt;
! 253: union {
! 254: struct sockaddr dst;
! 255: struct sockaddr_in6 dst6;
! 256: } u;
1.94 degroote 257: #ifdef FAST_IPSEC
258: struct m_tag *mtag;
259: struct tdb_ident *tdbi;
260: struct secpolicy *sp;
261: int s, error;
262: #endif
1.2 itojun 263:
264: #ifdef IPSEC
265: /*
266: * should the inner packet be considered authentic?
267: * see comment in ah4_input().
268: */
1.49 itojun 269: m->m_flags &= ~M_AUTHIPHDR;
270: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 271: #endif
1.9 itojun 272:
1.2 itojun 273: /*
1.81 rpaulo 274: * make sure we don't have onion peering information into m_tag.
275: */
276: ip6_delaux(m);
277:
278: /*
1.44 itojun 279: * mbuf statistics
1.2 itojun 280: */
281: if (m->m_flags & M_EXT) {
282: if (m->m_next)
283: ip6stat.ip6s_mext2m++;
284: else
285: ip6stat.ip6s_mext1++;
286: } else {
1.96 dyoung 287: #define M2MMAX __arraycount(ip6stat.ip6s_m2m)
1.2 itojun 288: if (m->m_next) {
1.9 itojun 289: if (m->m_flags & M_LOOP) {
1.77 peter 290: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 291: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 292: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
293: else
294: ip6stat.ip6s_m2m[0]++;
295: } else
296: ip6stat.ip6s_m1++;
1.40 itojun 297: #undef M2MMAX
1.2 itojun 298: }
299:
1.9 itojun 300: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
301: ip6stat.ip6s_total++;
302:
1.57 thorpej 303: /*
304: * If the IPv6 header is not aligned, slurp it up into a new
305: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 306: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 307: * IPv6 header is in the first mbuf of the chain.
308: */
1.97 christos 309: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 310: struct ifnet *inifp = m->m_pkthdr.rcvif;
311: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
312: (max_linkhdr + 3) & ~3)) == NULL) {
313: /* XXXJRT new stat, please */
314: ip6stat.ip6s_toosmall++;
315: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
316: return;
317: }
318: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
319: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 320: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 321: ip6stat.ip6s_toosmall++;
322: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
323: return;
324: }
1.2 itojun 325: }
326:
327: ip6 = mtod(m, struct ip6_hdr *);
328:
329: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
330: ip6stat.ip6s_badvers++;
1.9 itojun 331: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 332: goto bad;
333: }
1.15 darrenr 334:
1.98 liamjfoy 335: #if defined(IPSEC)
336: /* IPv6 fast forwarding is not compatible with IPsec. */
337: m->m_flags &= ~M_CANFASTFWD;
338: #else
339: /*
340: * Assume that we can create a fast-forward IP flow entry
341: * based on this packet.
342: */
343: m->m_flags |= M_CANFASTFWD;
344: #endif
345:
1.15 darrenr 346: #ifdef PFIL_HOOKS
347: /*
348: * Run through list of hooks for input packets. If there are any
349: * filters which require that additional packets in the flow are
350: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
351: * Note that filters must _never_ set this flag, as another filter
352: * in the list may have previously cleared it.
353: */
1.39 itojun 354: /*
355: * let ipfilter look at packet on the wire,
356: * not the decapsulated packet.
357: */
358: #ifdef IPSEC
1.42 itojun 359: if (!ipsec_getnhist(m))
1.94 degroote 360: #elif defined(FAST_IPSEC)
361: if (!ipsec_indone(m))
1.39 itojun 362: #else
363: if (1)
364: #endif
365: {
1.64 itojun 366: struct in6_addr odst;
367:
368: odst = ip6->ip6_dst;
1.39 itojun 369: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
370: PFIL_IN) != 0)
371: return;
372: if (m == NULL)
373: return;
374: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 375: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 376: }
1.15 darrenr 377: #endif /* PFIL_HOOKS */
378:
1.2 itojun 379: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
380:
1.30 thorpej 381: #ifdef ALTQ
382: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
383: /* packet is dropped by traffic conditioner */
384: return;
1.9 itojun 385: }
386: #endif
387:
1.2 itojun 388: /*
1.44 itojun 389: * Check against address spoofing/corruption.
1.2 itojun 390: */
391: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
392: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 393: /*
394: * XXX: "badscope" is not very suitable for a multicast source.
395: */
1.2 itojun 396: ip6stat.ip6s_badscope++;
1.9 itojun 397: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 398: goto bad;
399: }
1.13 itojun 400: /*
1.44 itojun 401: * The following check is not documented in specs. A malicious
402: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
403: * and bypass security checks (act as if it was from 127.0.0.1 by using
404: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 405: *
1.44 itojun 406: * This check chokes if we are in an SIIT cloud. As none of BSDs
407: * support IPv4-less kernel compilation, we cannot support SIIT
408: * environment at all. So, it makes more sense for us to reject any
409: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 410: * partial support for SIIT environment.
1.13 itojun 411: */
412: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
413: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
414: ip6stat.ip6s_badscope++;
415: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
416: goto bad;
417: }
1.17 itojun 418: #if 0
1.13 itojun 419: /*
1.17 itojun 420: * Reject packets with IPv4 compatible addresses (auto tunnel).
421: *
422: * The code forbids auto tunnel relay case in RFC1933 (the check is
423: * stronger than RFC1933). We may want to re-enable it if mech-xx
424: * is revised to forbid relaying case.
1.13 itojun 425: */
426: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
427: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
428: ip6stat.ip6s_badscope++;
429: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
430: goto bad;
431: }
432: #endif
1.35 itojun 433:
1.2 itojun 434: /*
1.82 yamt 435: * Disambiguate address scope zones (if there is ambiguity).
436: * We first make sure that the original source or destination address
437: * is not in our internal form for scoped addresses. Such addresses
438: * are not necessarily invalid spec-wise, but we cannot accept them due
439: * to the usage conflict.
440: * in6_setscope() then also checks and rejects the cases where src or
441: * dst are the loopback address and the receiving interface
442: * is not loopback.
443: */
1.88 bouyer 444: if (__predict_false(
445: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
446: goto bad;
447: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 448: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
449: ip6stat.ip6s_badscope++; /* XXX */
450: goto bad;
451: }
452: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
453: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
454: ip6stat.ip6s_badscope++;
455: goto bad;
456: }
457:
458: /*
1.2 itojun 459: * Multicast check
460: */
461: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
462: struct in6_multi *in6m = 0;
1.9 itojun 463:
464: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 465: /*
466: * See if we belong to the destination multicast group on the
467: * arrival interface.
468: */
469: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
470: if (in6m)
471: ours = 1;
472: else if (!ip6_mrouter) {
473: ip6stat.ip6s_notmember++;
474: ip6stat.ip6s_cantforward++;
1.9 itojun 475: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 476: goto bad;
477: }
1.9 itojun 478: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 479: goto hbhcheck;
480: }
481:
1.98.2.2! ad 482: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
! 483:
1.2 itojun 484: /*
485: * Unicast check
486: */
1.98.2.2! ad 487: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
! 488: if (hit)
1.25 itojun 489: ip6stat.ip6s_forward_cachehit++;
1.98.2.2! ad 490: else
1.93 joerg 491: ip6stat.ip6s_forward_cachemiss++;
1.22 itojun 492:
1.2 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: */
1.98.2.2! ad 504: if (rt != NULL &&
! 505: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
! 506: !(rt->rt_flags & RTF_CLONED) &&
1.2 itojun 507: #if 0
508: /*
509: * The check below is redundant since the comparison of
510: * the destination and the key of the rtentry has
511: * already done through looking up the routing table.
512: */
1.98.2.2! ad 513: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_key(rt)->sin6_addr) &&
1.2 itojun 514: #endif
1.98.2.2! ad 515: rt->rt_ifp->if_type == IFT_LOOP) {
! 516: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 517: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
518: m->m_flags |= M_ANYCAST6;
1.24 itojun 519: /*
520: * packets to a tentative, duplicated, or somehow invalid
521: * address must not be accepted.
522: */
1.2 itojun 523: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 524: /* this address is ready */
1.2 itojun 525: ours = 1;
1.9 itojun 526: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 527: goto hbhcheck;
528: } else {
1.24 itojun 529: /* address is not ready, so discard the packet. */
1.34 itojun 530: nd6log((LOG_INFO,
1.27 itojun 531: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 532: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 533: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 534:
535: goto bad;
1.2 itojun 536: }
537: }
538:
539: /*
1.55 itojun 540: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 541: */
542: #if defined(NFAITH) && 0 < NFAITH
543: if (ip6_keepfaith) {
1.98.2.2! ad 544: if (rt != NULL && rt->rt_ifp != NULL &&
! 545: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 546: /* XXX do we need more sanity checks? */
547: ours = 1;
1.98.2.2! ad 548: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 549: goto hbhcheck;
550: }
551: }
552: #endif
553:
554: #if 0
555: {
556: /*
557: * Last resort: check in6_ifaddr for incoming interface.
558: * The code is here until I update the "goto ours hack" code above
559: * working right.
560: */
561: struct ifaddr *ifa;
1.91 dyoung 562: TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) {
1.9 itojun 563: if (ifa->ifa_addr == NULL)
564: continue; /* just for safety */
565: if (ifa->ifa_addr->sa_family != AF_INET6)
566: continue;
567: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
568: ours = 1;
569: deliverifp = ifa->ifa_ifp;
1.2 itojun 570: goto hbhcheck;
571: }
572: }
1.9 itojun 573: }
1.2 itojun 574: #endif
575:
576: /*
577: * Now there is no reason to process the packet if it's not our own
578: * and we're not a router.
579: */
580: if (!ip6_forwarding) {
581: ip6stat.ip6s_cantforward++;
1.9 itojun 582: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 583: goto bad;
584: }
585:
586: hbhcheck:
587: /*
1.81 rpaulo 588: * record address information into m_tag, if we don't have one yet.
589: * note that we are unable to record it, if the address is not listed
590: * as our interface address (e.g. multicast addresses, addresses
591: * within FAITH prefixes and such).
592: */
593: if (deliverifp && !ip6_getdstifaddr(m)) {
594: struct in6_ifaddr *ia6;
595:
596: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
597: if (ia6) {
598: if (!ip6_setdstifaddr(m, ia6)) {
599: /*
600: * XXX maybe we should drop the packet here,
601: * as we could not provide enough information
602: * to the upper layers.
603: */
604: }
605: }
606: }
607:
608: /*
1.2 itojun 609: * Process Hop-by-Hop options header if it's contained.
610: * m may be modified in ip6_hopopts_input().
611: * If a JumboPayload option is included, plen will also be modified.
612: */
613: plen = (u_int32_t)ntohs(ip6->ip6_plen);
614: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 615: struct ip6_hbh *hbh;
616:
617: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
618: #if 0 /*touches NULL pointer*/
619: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
620: #endif
1.2 itojun 621: return; /* m have already been freed */
1.9 itojun 622: }
1.22 itojun 623:
1.2 itojun 624: /* adjust pointer */
625: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 626:
627: /*
1.49 itojun 628: * if the payload length field is 0 and the next header field
1.22 itojun 629: * indicates Hop-by-Hop Options header, then a Jumbo Payload
630: * option MUST be included.
631: */
632: if (ip6->ip6_plen == 0 && plen == 0) {
633: /*
634: * Note that if a valid jumbo payload option is
1.83 rpaulo 635: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 636: * (non-zero) payload length to the variable plen.
1.22 itojun 637: */
638: ip6stat.ip6s_badoptions++;
639: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
640: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
641: icmp6_error(m, ICMP6_PARAM_PROB,
642: ICMP6_PARAMPROB_HEADER,
1.97 christos 643: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 644: return;
645: }
1.9 itojun 646: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
647: sizeof(struct ip6_hbh));
648: if (hbh == NULL) {
649: ip6stat.ip6s_tooshort++;
650: return;
651: }
1.57 thorpej 652: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 653: nxt = hbh->ip6h_nxt;
1.2 itojun 654:
655: /*
656: * accept the packet if a router alert option is included
657: * and we act as an IPv6 router.
658: */
1.5 itojun 659: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 660: ours = 1;
661: } else
662: nxt = ip6->ip6_nxt;
663:
664: /*
665: * Check that the amount of data in the buffers
666: * is as at least much as the IPv6 header would have us expect.
667: * Trim mbufs if longer than we expect.
668: * Drop packet if shorter than we expect.
669: */
670: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
671: ip6stat.ip6s_tooshort++;
1.9 itojun 672: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 673: goto bad;
674: }
675: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
676: if (m->m_len == m->m_pkthdr.len) {
677: m->m_len = sizeof(struct ip6_hdr) + plen;
678: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
679: } else
680: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
681: }
682:
683: /*
684: * Forward if desirable.
685: */
686: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
687: /*
688: * If we are acting as a multicast router, all
689: * incoming multicast packets are passed to the
690: * kernel-level multicast forwarding function.
691: * The packet is returned (relatively) intact; if
692: * ip6_mforward() returns a non-zero value, the packet
693: * must be discarded, else it may be accepted below.
694: */
695: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
696: ip6stat.ip6s_cantforward++;
697: m_freem(m);
698: return;
699: }
700: if (!ours) {
701: m_freem(m);
702: return;
703: }
1.22 itojun 704: } else if (!ours) {
1.64 itojun 705: ip6_forward(m, srcrt);
1.2 itojun 706: return;
1.56 itojun 707: }
1.25 itojun 708:
709: ip6 = mtod(m, struct ip6_hdr *);
710:
711: /*
712: * Malicious party may be able to use IPv4 mapped addr to confuse
713: * tcp/udp stack and bypass security checks (act as if it was from
714: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
715: *
716: * For SIIT end node behavior, you may want to disable the check.
717: * However, you will become vulnerable to attacks using IPv4 mapped
718: * source.
719: */
720: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
721: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
722: ip6stat.ip6s_badscope++;
723: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
724: goto bad;
725: }
1.2 itojun 726:
727: /*
728: * Tell launch routine the next header
729: */
1.12 itojun 730: #ifdef IFA_STATS
1.28 itojun 731: if (deliverifp != NULL) {
1.9 itojun 732: struct in6_ifaddr *ia6;
733: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
734: if (ia6)
735: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
736: }
737: #endif
1.2 itojun 738: ip6stat.ip6s_delivered++;
1.9 itojun 739: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 740: nest = 0;
1.40 itojun 741:
1.98.2.2! ad 742: rh_present = 0;
1.2 itojun 743: while (nxt != IPPROTO_DONE) {
744: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
745: ip6stat.ip6s_toomanyhdr++;
1.98.2.2! ad 746: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 747: goto bad;
748: }
1.8 itojun 749:
750: /*
751: * protection against faulty packet - there should be
752: * more sanity checks in header chain processing.
753: */
754: if (m->m_pkthdr.len < off) {
755: ip6stat.ip6s_tooshort++;
1.9 itojun 756: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 757: goto bad;
758: }
759:
1.98.2.2! ad 760: if (nxt == IPPROTO_ROUTING) {
! 761: if (rh_present++) {
! 762: in6_ifstat_inc(m->m_pkthdr.rcvif,
! 763: ifs6_in_hdrerr);
! 764: ip6stat.ip6s_badoptions++;
! 765: goto bad;
! 766: }
! 767: }
! 768:
1.37 itojun 769: #ifdef IPSEC
770: /*
771: * enforce IPsec policy checking if we are seeing last header.
772: * note that we do not visit this with protocols with pcb layer
773: * code - like udp/tcp/raw ip.
774: */
775: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
776: ipsec6_in_reject(m, NULL)) {
777: ipsec6stat.in_polvio++;
778: goto bad;
779: }
780: #endif
1.94 degroote 781: #ifdef FAST_IPSEC
782: /*
783: * enforce IPsec policy checking if we are seeing last header.
784: * note that we do not visit this with protocols with pcb layer
785: * code - like udp/tcp/raw ip.
786: */
787: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
788: /*
789: * Check if the packet has already had IPsec processing
790: * done. If so, then just pass it along. This tag gets
791: * set during AH, ESP, etc. input handling, before the
792: * packet is returned to the ip input queue for delivery.
793: */
794: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
795: s = splsoftnet();
796: if (mtag != NULL) {
797: tdbi = (struct tdb_ident *)(mtag + 1);
798: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
799: } else {
800: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
801: IP_FORWARDING, &error);
802: }
803: if (sp != NULL) {
804: /*
805: * Check security policy against packet attributes.
806: */
807: error = ipsec_in_reject(sp, m);
808: KEY_FREESP(&sp);
809: } else {
810: /* XXX error stat??? */
811: error = EINVAL;
812: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
813: 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 *
1.98.2.2! ad 833: ip6_setdstifaddr(struct mbuf *m, struct in6_ifaddr *ia6)
1.81 rpaulo 834: {
835: struct m_tag *mtag;
836:
837: mtag = ip6_addaux(m);
838: if (mtag)
839: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
840: return mtag; /* NULL if failed to set */
841: }
842:
843: struct in6_ifaddr *
1.98.2.2! ad 844: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 845: {
846: struct m_tag *mtag;
847:
848: mtag = ip6_findaux(m);
849: if (mtag)
850: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
851: else
852: return NULL;
853: }
854:
855: /*
1.2 itojun 856: * Hop-by-Hop options header processing. If a valid jumbo payload option is
857: * included, the real payload length will be stored in plenp.
1.98.2.2! ad 858: *
! 859: * rtalertp - XXX: should be stored more smart way
1.2 itojun 860: */
861: static int
1.98.2.2! ad 862: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
! 863: struct mbuf **mp, int *offp)
1.2 itojun 864: {
1.35 itojun 865: struct mbuf *m = *mp;
1.2 itojun 866: int off = *offp, hbhlen;
867: struct ip6_hbh *hbh;
868:
869: /* validation of the length of the header */
1.9 itojun 870: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
871: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
872: if (hbh == NULL) {
873: ip6stat.ip6s_tooshort++;
874: return -1;
875: }
876: hbhlen = (hbh->ip6h_len + 1) << 3;
877: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
878: hbhlen);
879: if (hbh == NULL) {
880: ip6stat.ip6s_tooshort++;
881: return -1;
882: }
1.57 thorpej 883: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 884: off += hbhlen;
885: hbhlen -= sizeof(struct ip6_hbh);
886:
887: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
888: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 889: return (-1);
1.2 itojun 890:
891: *offp = off;
892: *mp = m;
1.58 itojun 893: return (0);
1.2 itojun 894: }
895:
896: /*
897: * Search header for all Hop-by-hop options and process each option.
898: * This function is separate from ip6_hopopts_input() in order to
899: * handle a case where the sending node itself process its hop-by-hop
900: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 901: *
902: * The function assumes that hbh header is located right after the IPv6 header
903: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
904: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 905: */
906: int
1.98.2.2! ad 907: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
! 908: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 909: {
910: struct ip6_hdr *ip6;
911: int optlen = 0;
912: u_int8_t *opt = opthead;
913: u_int16_t rtalert_val;
1.22 itojun 914: u_int32_t jumboplen;
1.55 itojun 915: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 916:
917: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 918: switch (*opt) {
919: case IP6OPT_PAD1:
920: optlen = 1;
921: break;
922: case IP6OPT_PADN:
923: if (hbhlen < IP6OPT_MINLEN) {
924: ip6stat.ip6s_toosmall++;
925: goto bad;
926: }
927: optlen = *(opt + 1) + 2;
928: break;
929: case IP6OPT_RTALERT:
930: /* XXX may need check for alignment */
931: if (hbhlen < IP6OPT_RTALERT_LEN) {
932: ip6stat.ip6s_toosmall++;
933: goto bad;
934: }
935: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 936: /* XXX stat */
937: icmp6_error(m, ICMP6_PARAM_PROB,
938: ICMP6_PARAMPROB_HEADER,
939: erroff + opt + 1 - opthead);
940: return (-1);
1.35 itojun 941: }
942: optlen = IP6OPT_RTALERT_LEN;
1.97 christos 943: bcopy((void *)(opt + 2), (void *)&rtalert_val, 2);
1.35 itojun 944: *rtalertp = ntohs(rtalert_val);
945: break;
946: case IP6OPT_JUMBO:
1.22 itojun 947: /* XXX may need check for alignment */
948: if (hbhlen < IP6OPT_JUMBO_LEN) {
949: ip6stat.ip6s_toosmall++;
950: goto bad;
951: }
1.35 itojun 952: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 953: /* XXX stat */
954: icmp6_error(m, ICMP6_PARAM_PROB,
955: ICMP6_PARAMPROB_HEADER,
956: erroff + opt + 1 - opthead);
957: return (-1);
1.35 itojun 958: }
1.22 itojun 959: optlen = IP6OPT_JUMBO_LEN;
960:
961: /*
962: * IPv6 packets that have non 0 payload length
1.35 itojun 963: * must not contain a jumbo payload option.
1.22 itojun 964: */
965: ip6 = mtod(m, struct ip6_hdr *);
966: if (ip6->ip6_plen) {
967: ip6stat.ip6s_badoptions++;
968: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 969: ICMP6_PARAMPROB_HEADER,
970: erroff + opt - opthead);
971: return (-1);
1.22 itojun 972: }
1.2 itojun 973:
1.22 itojun 974: /*
975: * We may see jumbolen in unaligned location, so
976: * we'd need to perform bcopy().
977: */
978: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
979: jumboplen = (u_int32_t)htonl(jumboplen);
980:
981: #if 1
982: /*
983: * if there are multiple jumbo payload options,
984: * *plenp will be non-zero and the packet will be
985: * rejected.
986: * the behavior may need some debate in ipngwg -
987: * multiple options does not make sense, however,
988: * there's no explicit mention in specification.
989: */
990: if (*plenp != 0) {
991: ip6stat.ip6s_badoptions++;
992: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 993: ICMP6_PARAMPROB_HEADER,
994: erroff + opt + 2 - opthead);
995: return (-1);
1.22 itojun 996: }
1.8 itojun 997: #endif
1.2 itojun 998:
1.22 itojun 999: /*
1000: * jumbo payload length must be larger than 65535.
1001: */
1002: if (jumboplen <= IPV6_MAXPACKET) {
1003: ip6stat.ip6s_badoptions++;
1004: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1005: ICMP6_PARAMPROB_HEADER,
1006: erroff + opt + 2 - opthead);
1007: return (-1);
1.22 itojun 1008: }
1009: *plenp = jumboplen;
1010:
1011: break;
1.35 itojun 1012: default: /* unknown option */
1013: if (hbhlen < IP6OPT_MINLEN) {
1014: ip6stat.ip6s_toosmall++;
1015: goto bad;
1016: }
1.55 itojun 1017: optlen = ip6_unknown_opt(opt, m,
1018: erroff + opt - opthead);
1019: if (optlen == -1)
1020: return (-1);
1.35 itojun 1021: optlen += 2;
1022: break;
1.2 itojun 1023: }
1024: }
1025:
1.55 itojun 1026: return (0);
1.2 itojun 1027:
1028: bad:
1029: m_freem(m);
1.55 itojun 1030: return (-1);
1.2 itojun 1031: }
1032:
1033: /*
1034: * Unknown option processing.
1035: * The third argument `off' is the offset from the IPv6 header to the option,
1036: * which is necessary if the IPv6 header the and option header and IPv6 header
1037: * is not continuous in order to return an ICMPv6 error.
1038: */
1039: int
1.98.2.2! ad 1040: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1041: {
1042: struct ip6_hdr *ip6;
1043:
1.35 itojun 1044: switch (IP6OPT_TYPE(*optp)) {
1045: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1046: return ((int)*(optp + 1));
1.35 itojun 1047: case IP6OPT_TYPE_DISCARD: /* silently discard */
1048: m_freem(m);
1.58 itojun 1049: return (-1);
1.35 itojun 1050: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1051: ip6stat.ip6s_badoptions++;
1052: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1053: return (-1);
1.35 itojun 1054: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1055: ip6stat.ip6s_badoptions++;
1056: ip6 = mtod(m, struct ip6_hdr *);
1057: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1058: (m->m_flags & (M_BCAST|M_MCAST)))
1059: m_freem(m);
1060: else
1061: icmp6_error(m, ICMP6_PARAM_PROB,
1062: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1063: return (-1);
1.2 itojun 1064: }
1065:
1066: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1067: return (-1);
1.2 itojun 1068: }
1069:
1070: /*
1.9 itojun 1071: * Create the "control" list for this pcb.
1072: *
1073: * The routine will be called from upper layer handlers like tcp6_input().
1074: * Thus the routine assumes that the caller (tcp6_input) have already
1075: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1076: * very first mbuf on the mbuf chain.
1077: * We may want to add some infinite loop prevention or sanity checks for safety.
1078: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1079: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1080: */
1081: void
1.98.2.2! ad 1082: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
! 1083: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1084: {
1.85 rpaulo 1085: #ifdef RFC2292
1086: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1087: #else
1088: #define IS2292(x, y) (y)
1089: #endif
1090:
1.9 itojun 1091: #ifdef SO_TIMESTAMP
1.2 itojun 1092: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1093: struct timeval tv;
1094:
1095: microtime(&tv);
1.97 christos 1096: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1097: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1098: if (*mp)
1099: mp = &(*mp)->m_next;
1100: }
1.9 itojun 1101: #endif
1.87 rpaulo 1102:
1103: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1104: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1105: return;
1106:
1.2 itojun 1107: /* RFC 2292 sec. 5 */
1.35 itojun 1108: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1109: struct in6_pktinfo pi6;
1.85 rpaulo 1110:
1.2 itojun 1111: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1112: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1113: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1114: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1115: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1116: sizeof(struct in6_pktinfo),
1117: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1118: if (*mp)
1119: mp = &(*mp)->m_next;
1120: }
1.85 rpaulo 1121:
1.2 itojun 1122: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1123: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1124:
1.97 christos 1125: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1126: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1127: if (*mp)
1128: mp = &(*mp)->m_next;
1129: }
1130:
1131: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1132: u_int32_t flowinfo;
1133: int tclass;
1134:
1135: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1136: flowinfo >>= 20;
1137:
1138: tclass = flowinfo & 0xff;
1.97 christos 1139: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1140: IPV6_TCLASS, IPPROTO_IPV6);
1141:
1.2 itojun 1142: if (*mp)
1143: mp = &(*mp)->m_next;
1144: }
1145:
1146: /*
1.75 itojun 1147: * IPV6_HOPOPTS socket option. Recall that we required super-user
1148: * privilege for the option (see ip6_ctloutput), but it might be too
1149: * strict, since there might be some hop-by-hop options which can be
1150: * returned to normal user.
1.85 rpaulo 1151: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1152: */
1.75 itojun 1153: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1154: /*
1155: * Check if a hop-by-hop options header is contatined in the
1156: * received packet, and if so, store the options as ancillary
1157: * data. Note that a hop-by-hop options header must be
1158: * just after the IPv6 header, which fact is assured through
1159: * the IPv6 input processing.
1160: */
1.78 christos 1161: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1162: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1163: struct ip6_hbh *hbh;
1164: int hbhlen;
1.62 itojun 1165: struct mbuf *ext;
1.9 itojun 1166:
1.62 itojun 1167: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1168: xip6->ip6_nxt);
1.62 itojun 1169: if (ext == NULL) {
1.9 itojun 1170: ip6stat.ip6s_tooshort++;
1171: return;
1172: }
1.62 itojun 1173: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1174: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1175: if (hbhlen != ext->m_len) {
1176: m_freem(ext);
1.9 itojun 1177: ip6stat.ip6s_tooshort++;
1178: return;
1179: }
1.2 itojun 1180:
1181: /*
1182: * XXX: We copy whole the header even if a jumbo
1183: * payload option is included, which option is to
1184: * be removed before returning in the RFC 2292.
1.85 rpaulo 1185: * Note: this constraint is removed in RFC3542.
1.2 itojun 1186: */
1.97 christos 1187: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1188: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1189: IPPROTO_IPV6);
1.2 itojun 1190: if (*mp)
1191: mp = &(*mp)->m_next;
1.62 itojun 1192: m_freem(ext);
1.2 itojun 1193: }
1194: }
1195:
1196: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1197: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1198: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1199: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1200:
1201: /*
1202: * Search for destination options headers or routing
1203: * header(s) through the header chain, and stores each
1204: * header as ancillary data.
1205: * Note that the order of the headers remains in
1206: * the chain of ancillary data.
1207: */
1.86 rpaulo 1208: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1209: struct ip6_ext *ip6e = NULL;
1.9 itojun 1210: int elen;
1.62 itojun 1211: struct mbuf *ext = NULL;
1.9 itojun 1212:
1.62 itojun 1213: /*
1214: * if it is not an extension header, don't try to
1215: * pull it from the chain.
1216: */
1217: switch (nxt) {
1218: case IPPROTO_DSTOPTS:
1219: case IPPROTO_ROUTING:
1220: case IPPROTO_HOPOPTS:
1221: case IPPROTO_AH: /* is it possible? */
1222: break;
1223: default:
1224: goto loopend;
1225: }
1226:
1227: ext = ip6_pullexthdr(m, off, nxt);
1228: if (ext == NULL) {
1.9 itojun 1229: ip6stat.ip6s_tooshort++;
1230: return;
1231: }
1.62 itojun 1232: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1233: if (nxt == IPPROTO_AH)
1234: elen = (ip6e->ip6e_len + 2) << 2;
1235: else
1236: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1237: if (elen != ext->m_len) {
1238: m_freem(ext);
1.9 itojun 1239: ip6stat.ip6s_tooshort++;
1240: return;
1241: }
1.57 thorpej 1242: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1243:
1.35 itojun 1244: switch (nxt) {
1.62 itojun 1245: case IPPROTO_DSTOPTS:
1.35 itojun 1246: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1247: break;
1248:
1.97 christos 1249: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1250: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1251: IPPROTO_IPV6);
1.35 itojun 1252: if (*mp)
1253: mp = &(*mp)->m_next;
1254: break;
1255:
1256: case IPPROTO_ROUTING:
1257: if (!in6p->in6p_flags & IN6P_RTHDR)
1258: break;
1259:
1.97 christos 1260: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1261: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1262: IPPROTO_IPV6);
1.35 itojun 1263: if (*mp)
1264: mp = &(*mp)->m_next;
1265: break;
1266:
1.62 itojun 1267: case IPPROTO_HOPOPTS:
1268: case IPPROTO_AH: /* is it possible? */
1269: break;
1270:
1.35 itojun 1271: default:
1272: /*
1.62 itojun 1273: * other cases have been filtered in the above.
1274: * none will visit this case. here we supply
1275: * the code just in case (nxt overwritten or
1276: * other cases).
1.35 itojun 1277: */
1.62 itojun 1278: m_freem(ext);
1.35 itojun 1279: goto loopend;
1280:
1.2 itojun 1281: }
1282:
1283: /* proceed with the next header. */
1.9 itojun 1284: off += elen;
1.2 itojun 1285: nxt = ip6e->ip6e_nxt;
1.62 itojun 1286: ip6e = NULL;
1287: m_freem(ext);
1288: ext = NULL;
1.2 itojun 1289: }
1290: loopend:
1.62 itojun 1291: ;
1.2 itojun 1292: }
1.62 itojun 1293: }
1.85 rpaulo 1294: #undef IS2292
1295:
1296:
1297: void
1.95 dyoung 1298: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1299: uint32_t *mtu)
1.85 rpaulo 1300: {
1301: struct socket *so;
1302: struct mbuf *m_mtu;
1303: struct ip6_mtuinfo mtuctl;
1304:
1305: so = in6p->in6p_socket;
1306:
1307: if (mtu == NULL)
1308: return;
1309:
1310: #ifdef DIAGNOSTIC
1311: if (so == NULL) /* I believe this is impossible */
1312: panic("ip6_notify_pmtu: socket is NULL");
1313: #endif
1314:
1315: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1316: mtuctl.ip6m_mtu = *mtu;
1317: mtuctl.ip6m_addr = *dst;
1318: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1319: return;
1320:
1.97 christos 1321: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1322: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1323: return;
1324:
1.95 dyoung 1325: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1326: == 0) {
1327: m_freem(m_mtu);
1328: /* XXX: should count statistics */
1329: } else
1330: sorwakeup(so);
1331:
1332: return;
1333: }
1.62 itojun 1334:
1335: /*
1336: * pull single extension header from mbuf chain. returns single mbuf that
1337: * contains the result, or NULL on error.
1338: */
1339: static struct mbuf *
1.98.2.2! ad 1340: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1341: {
1342: struct ip6_ext ip6e;
1343: size_t elen;
1344: struct mbuf *n;
1345:
1346: #ifdef DIAGNOSTIC
1347: switch (nxt) {
1348: case IPPROTO_DSTOPTS:
1349: case IPPROTO_ROUTING:
1350: case IPPROTO_HOPOPTS:
1351: case IPPROTO_AH: /* is it possible? */
1352: break;
1353: default:
1354: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1355: }
1.62 itojun 1356: #endif
1.2 itojun 1357:
1.97 christos 1358: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1359: if (nxt == IPPROTO_AH)
1360: elen = (ip6e.ip6e_len + 2) << 2;
1361: else
1362: elen = (ip6e.ip6e_len + 1) << 3;
1363:
1364: MGET(n, M_DONTWAIT, MT_DATA);
1365: if (n && elen >= MLEN) {
1366: MCLGET(n, M_DONTWAIT);
1367: if ((n->m_flags & M_EXT) == 0) {
1368: m_free(n);
1369: n = NULL;
1370: }
1371: }
1372: if (!n)
1373: return NULL;
1374:
1375: n->m_len = 0;
1376: if (elen >= M_TRAILINGSPACE(n)) {
1377: m_free(n);
1378: return NULL;
1379: }
1380:
1.97 christos 1381: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1382: n->m_len = elen;
1383: return n;
1.2 itojun 1384: }
1385:
1386: /*
1387: * Get pointer to the previous header followed by the header
1388: * currently processed.
1389: * XXX: This function supposes that
1390: * M includes all headers,
1391: * the next header field and the header length field of each header
1392: * are valid, and
1393: * the sum of each header length equals to OFF.
1394: * Because of these assumptions, this function must be called very
1395: * carefully. Moreover, it will not be used in the near future when
1396: * we develop `neater' mechanism to process extension headers.
1397: */
1.58 itojun 1398: u_int8_t *
1.98.2.2! ad 1399: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1400: {
1401: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1402:
1403: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1404: return (&ip6->ip6_nxt);
1.2 itojun 1405: else {
1406: int len, nxt;
1407: struct ip6_ext *ip6e = NULL;
1408:
1409: nxt = ip6->ip6_nxt;
1410: len = sizeof(struct ip6_hdr);
1411: while (len < off) {
1.97 christos 1412: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1413:
1.35 itojun 1414: switch (nxt) {
1.2 itojun 1415: case IPPROTO_FRAGMENT:
1416: len += sizeof(struct ip6_frag);
1417: break;
1418: case IPPROTO_AH:
1419: len += (ip6e->ip6e_len + 2) << 2;
1420: break;
1421: default:
1422: len += (ip6e->ip6e_len + 1) << 3;
1423: break;
1424: }
1425: nxt = ip6e->ip6e_nxt;
1426: }
1427: if (ip6e)
1.58 itojun 1428: return (&ip6e->ip6e_nxt);
1.2 itojun 1429: else
1430: return NULL;
1.18 itojun 1431: }
1432: }
1433:
1434: /*
1435: * get next header offset. m will be retained.
1436: */
1437: int
1.98.2.2! ad 1438: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1439: {
1440: struct ip6_hdr ip6;
1441: struct ip6_ext ip6e;
1442: struct ip6_frag fh;
1443:
1444: /* just in case */
1445: if (m == NULL)
1446: panic("ip6_nexthdr: m == NULL");
1447: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1448: return -1;
1449:
1450: switch (proto) {
1451: case IPPROTO_IPV6:
1.83 rpaulo 1452: /* do not chase beyond intermediate IPv6 headers */
1453: if (off != 0)
1454: return -1;
1.18 itojun 1455: if (m->m_pkthdr.len < off + sizeof(ip6))
1456: return -1;
1.97 christos 1457: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1458: if (nxtp)
1459: *nxtp = ip6.ip6_nxt;
1460: off += sizeof(ip6);
1461: return off;
1462:
1463: case IPPROTO_FRAGMENT:
1464: /*
1465: * terminate parsing if it is not the first fragment,
1466: * it does not make sense to parse through it.
1467: */
1468: if (m->m_pkthdr.len < off + sizeof(fh))
1469: return -1;
1.97 christos 1470: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1471: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1472: return -1;
1473: if (nxtp)
1474: *nxtp = fh.ip6f_nxt;
1475: off += sizeof(struct ip6_frag);
1476: return off;
1477:
1478: case IPPROTO_AH:
1479: if (m->m_pkthdr.len < off + sizeof(ip6e))
1480: return -1;
1.97 christos 1481: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1482: if (nxtp)
1483: *nxtp = ip6e.ip6e_nxt;
1484: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1485: if (m->m_pkthdr.len < off)
1486: return -1;
1.18 itojun 1487: return off;
1488:
1489: case IPPROTO_HOPOPTS:
1490: case IPPROTO_ROUTING:
1491: case IPPROTO_DSTOPTS:
1492: if (m->m_pkthdr.len < off + sizeof(ip6e))
1493: return -1;
1.97 christos 1494: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1495: if (nxtp)
1496: *nxtp = ip6e.ip6e_nxt;
1497: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1498: if (m->m_pkthdr.len < off)
1499: return -1;
1.18 itojun 1500: return off;
1501:
1502: case IPPROTO_NONE:
1503: case IPPROTO_ESP:
1504: case IPPROTO_IPCOMP:
1505: /* give up */
1506: return -1;
1507:
1508: default:
1509: return -1;
1510: }
1511: }
1512:
1513: /*
1514: * get offset for the last header in the chain. m will be kept untainted.
1515: */
1516: int
1.98.2.2! ad 1517: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1518: {
1519: int newoff;
1520: int nxt;
1521:
1522: if (!nxtp) {
1523: nxt = -1;
1524: nxtp = &nxt;
1525: }
1.86 rpaulo 1526: for (;;) {
1.18 itojun 1527: newoff = ip6_nexthdr(m, off, proto, nxtp);
1528: if (newoff < 0)
1529: return off;
1530: else if (newoff < off)
1531: return -1; /* invalid */
1532: else if (newoff == off)
1533: return newoff;
1534:
1535: off = newoff;
1536: proto = *nxtp;
1.2 itojun 1537: }
1538: }
1539:
1.81 rpaulo 1540: struct m_tag *
1.98.2.2! ad 1541: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1542: {
1543: struct m_tag *mtag;
1544:
1545: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1546: if (!mtag) {
1547: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1548: M_NOWAIT);
1549: if (mtag) {
1550: m_tag_prepend(m, mtag);
1551: bzero(mtag + 1, sizeof(struct ip6aux));
1552: }
1553: }
1554: return mtag;
1555: }
1556:
1557: struct m_tag *
1.98.2.2! ad 1558: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1559: {
1560: struct m_tag *mtag;
1561:
1562: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1563: return mtag;
1564: }
1565:
1566: void
1.98.2.2! ad 1567: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1568: {
1569: struct m_tag *mtag;
1570:
1571: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1572: if (mtag)
1573: m_tag_delete(m, mtag);
1574: }
1575:
1.98 liamjfoy 1576: #ifdef GATEWAY
1577: /*
1578: * sysctl helper routine for net.inet.ip6.maxflows. Since
1579: * we could reduce this value, call ip6flow_reap();
1580: */
1581: static int
1.98.2.1 ad 1582: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1583: {
1584: int s;
1585:
1586: s = sysctl_lookup(SYSCTLFN_CALL(rnode));
1.98.2.1 ad 1587: if (s || newp == NULL)
1.98 liamjfoy 1588: return (s);
1589:
1590: s = splsoftnet();
1591: ip6flow_reap(0);
1592: splx(s);
1593:
1594: return (0);
1595: }
1.98.2.1 ad 1596:
1597: static int
1598: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1599: {
1600: int error, tmp;
1601: struct sysctlnode node;
1602:
1603: node = *rnode;
1604: tmp = ip6_hashsize;
1605: node.sysctl_data = &tmp;
1606: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1607: if (error || newp == NULL)
1608: return (error);
1609:
1610: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1611: /*
1612: * Can only fail due to malloc()
1613: */
1614: if (ip6flow_invalidate_all(tmp))
1615: return ENOMEM;
1616: } else {
1617: /*
1618: * EINVAL if not a power of 2
1619: */
1620: return EINVAL;
1621: }
1622:
1623: return (0);
1624: }
1.98 liamjfoy 1625: #endif /* GATEWAY */
1626:
1.2 itojun 1627: /*
1628: * System control for IP6
1629: */
1630:
1631: u_char inet6ctlerrmap[PRC_NCMDS] = {
1632: 0, 0, 0, 0,
1633: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1634: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1635: EMSGSIZE, EHOSTUNREACH, 0, 0,
1636: 0, 0, 0, 0,
1637: ENOPROTOOPT
1638: };
1639:
1.70 atatat 1640: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1641: {
1.85 rpaulo 1642: #ifdef RFC2292
1643: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1644: #else
1645: #define IS2292(x, y) (y)
1646: #endif
1.26 itojun 1647:
1.73 atatat 1648: sysctl_createv(clog, 0, NULL, NULL,
1649: CTLFLAG_PERMANENT,
1.70 atatat 1650: CTLTYPE_NODE, "net", NULL,
1651: NULL, 0, NULL, 0,
1652: CTL_NET, CTL_EOL);
1.73 atatat 1653: sysctl_createv(clog, 0, NULL, NULL,
1654: CTLFLAG_PERMANENT,
1.74 atatat 1655: CTLTYPE_NODE, "inet6",
1656: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1657: NULL, 0, NULL, 0,
1658: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1659: sysctl_createv(clog, 0, NULL, NULL,
1660: CTLFLAG_PERMANENT,
1.74 atatat 1661: CTLTYPE_NODE, "ip6",
1662: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1663: NULL, 0, NULL, 0,
1664: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1665:
1.73 atatat 1666: sysctl_createv(clog, 0, NULL, NULL,
1667: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1668: CTLTYPE_INT, "forwarding",
1669: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1670: NULL, 0, &ip6_forwarding, 0,
1671: CTL_NET, PF_INET6, IPPROTO_IPV6,
1672: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1673: sysctl_createv(clog, 0, NULL, NULL,
1674: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1675: CTLTYPE_INT, "redirect",
1676: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1677: NULL, 0, &ip6_sendredirects, 0,
1678: CTL_NET, PF_INET6, IPPROTO_IPV6,
1679: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1680: sysctl_createv(clog, 0, NULL, NULL,
1681: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1682: CTLTYPE_INT, "hlim",
1683: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1684: NULL, 0, &ip6_defhlim, 0,
1685: CTL_NET, PF_INET6, IPPROTO_IPV6,
1686: IPV6CTL_DEFHLIM, CTL_EOL);
1687: #ifdef notyet
1.73 atatat 1688: sysctl_createv(clog, 0, NULL, NULL,
1689: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1690: CTLTYPE_INT, "mtu", NULL,
1691: NULL, 0, &, 0,
1692: CTL_NET, PF_INET6, IPPROTO_IPV6,
1693: IPV6CTL_DEFMTU, CTL_EOL);
1694: #endif
1695: #ifdef __no_idea__
1.73 atatat 1696: sysctl_createv(clog, 0, NULL, NULL,
1697: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1698: CTLTYPE_INT, "forwsrcrt", NULL,
1699: NULL, 0, &?, 0,
1700: CTL_NET, PF_INET6, IPPROTO_IPV6,
1701: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1702: sysctl_createv(clog, 0, NULL, NULL,
1703: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1704: CTLTYPE_STRUCT, "mrtstats", NULL,
1705: NULL, 0, &?, sizeof(?),
1706: CTL_NET, PF_INET6, IPPROTO_IPV6,
1707: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1708: sysctl_createv(clog, 0, NULL, NULL,
1709: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1710: CTLTYPE_?, "mrtproto", NULL,
1711: NULL, 0, &?, sizeof(?),
1712: CTL_NET, PF_INET6, IPPROTO_IPV6,
1713: IPV6CTL_MRTPROTO, CTL_EOL);
1714: #endif
1.73 atatat 1715: sysctl_createv(clog, 0, NULL, NULL,
1716: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1717: CTLTYPE_INT, "maxfragpackets",
1718: SYSCTL_DESCR("Maximum number of fragments to buffer "
1719: "for reassembly"),
1.70 atatat 1720: NULL, 0, &ip6_maxfragpackets, 0,
1721: CTL_NET, PF_INET6, IPPROTO_IPV6,
1722: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1723: #ifdef __no_idea__
1.73 atatat 1724: sysctl_createv(clog, 0, NULL, NULL,
1725: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1726: CTLTYPE_INT, "sourcecheck", NULL,
1727: NULL, 0, &?, 0,
1728: CTL_NET, PF_INET6, IPPROTO_IPV6,
1729: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1730: sysctl_createv(clog, 0, NULL, NULL,
1731: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1732: CTLTYPE_INT, "sourcecheck_logint", NULL,
1733: NULL, 0, &?, 0,
1734: CTL_NET, PF_INET6, IPPROTO_IPV6,
1735: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1736: #endif
1.73 atatat 1737: sysctl_createv(clog, 0, NULL, NULL,
1738: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1739: CTLTYPE_INT, "accept_rtadv",
1740: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1741: NULL, 0, &ip6_accept_rtadv, 0,
1742: CTL_NET, PF_INET6, IPPROTO_IPV6,
1743: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1744: sysctl_createv(clog, 0, NULL, NULL,
1745: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1746: CTLTYPE_INT, "keepfaith",
1747: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1748: NULL, 0, &ip6_keepfaith, 0,
1749: CTL_NET, PF_INET6, IPPROTO_IPV6,
1750: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1751: sysctl_createv(clog, 0, NULL, NULL,
1752: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1753: CTLTYPE_INT, "log_interval",
1754: SYSCTL_DESCR("Minumum interval between logging "
1755: "unroutable packets"),
1.70 atatat 1756: NULL, 0, &ip6_log_interval, 0,
1757: CTL_NET, PF_INET6, IPPROTO_IPV6,
1758: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1759: sysctl_createv(clog, 0, NULL, NULL,
1760: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1761: CTLTYPE_INT, "hdrnestlimit",
1762: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1763: NULL, 0, &ip6_hdrnestlimit, 0,
1764: CTL_NET, PF_INET6, IPPROTO_IPV6,
1765: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1766: sysctl_createv(clog, 0, NULL, NULL,
1767: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1768: CTLTYPE_INT, "dad_count",
1769: SYSCTL_DESCR("Number of Duplicate Address Detection "
1770: "probes to send"),
1.70 atatat 1771: NULL, 0, &ip6_dad_count, 0,
1772: CTL_NET, PF_INET6, IPPROTO_IPV6,
1773: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1774: sysctl_createv(clog, 0, NULL, NULL,
1775: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1776: CTLTYPE_INT, "auto_flowlabel",
1777: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1778: NULL, 0, &ip6_auto_flowlabel, 0,
1779: CTL_NET, PF_INET6, IPPROTO_IPV6,
1780: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1781: sysctl_createv(clog, 0, NULL, NULL,
1782: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1783: CTLTYPE_INT, "defmcasthlim",
1784: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1785: NULL, 0, &ip6_defmcasthlim, 0,
1786: CTL_NET, PF_INET6, IPPROTO_IPV6,
1787: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1788: #if NGIF > 0
1.73 atatat 1789: sysctl_createv(clog, 0, NULL, NULL,
1790: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1791: CTLTYPE_INT, "gifhlim",
1792: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1793: NULL, 0, &ip6_gif_hlim, 0,
1794: CTL_NET, PF_INET6, IPPROTO_IPV6,
1795: IPV6CTL_GIF_HLIM, CTL_EOL);
1796: #endif /* NGIF */
1.73 atatat 1797: sysctl_createv(clog, 0, NULL, NULL,
1798: CTLFLAG_PERMANENT,
1.74 atatat 1799: CTLTYPE_STRING, "kame_version",
1800: SYSCTL_DESCR("KAME Version"),
1.78 christos 1801: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1802: CTL_NET, PF_INET6, IPPROTO_IPV6,
1803: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1804: sysctl_createv(clog, 0, NULL, NULL,
1805: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1806: CTLTYPE_INT, "use_deprecated",
1807: SYSCTL_DESCR("Allow use of deprecated addresses as "
1808: "source addresses"),
1.70 atatat 1809: NULL, 0, &ip6_use_deprecated, 0,
1810: CTL_NET, PF_INET6, IPPROTO_IPV6,
1811: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1812: sysctl_createv(clog, 0, NULL, NULL,
1813: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1814: CTLTYPE_INT, "rr_prune", NULL,
1815: NULL, 0, &ip6_rr_prune, 0,
1816: CTL_NET, PF_INET6, IPPROTO_IPV6,
1817: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1818: sysctl_createv(clog, 0, NULL, NULL,
1819: CTLFLAG_PERMANENT
1.70 atatat 1820: #ifndef INET6_BINDV6ONLY
1.73 atatat 1821: |CTLFLAG_READWRITE,
1.70 atatat 1822: #endif
1.74 atatat 1823: CTLTYPE_INT, "v6only",
1824: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1825: "to PF_INET sockets"),
1.70 atatat 1826: NULL, 0, &ip6_v6only, 0,
1827: CTL_NET, PF_INET6, IPPROTO_IPV6,
1828: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1829: sysctl_createv(clog, 0, NULL, NULL,
1830: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1831: CTLTYPE_INT, "anonportmin",
1832: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1833: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1834: CTL_NET, PF_INET6, IPPROTO_IPV6,
1835: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1836: sysctl_createv(clog, 0, NULL, NULL,
1837: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1838: CTLTYPE_INT, "anonportmax",
1839: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1840: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1841: CTL_NET, PF_INET6, IPPROTO_IPV6,
1842: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1843: #ifndef IPNOPRIVPORTS
1.73 atatat 1844: sysctl_createv(clog, 0, NULL, NULL,
1845: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1846: CTLTYPE_INT, "lowportmin",
1847: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1848: "to assign"),
1.70 atatat 1849: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1850: CTL_NET, PF_INET6, IPPROTO_IPV6,
1851: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1852: sysctl_createv(clog, 0, NULL, NULL,
1853: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1854: CTLTYPE_INT, "lowportmax",
1855: SYSCTL_DESCR("Highest privileged ephemeral port number "
1856: "to assign"),
1.70 atatat 1857: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1858: CTL_NET, PF_INET6, IPPROTO_IPV6,
1859: IPV6CTL_LOWPORTMAX, CTL_EOL);
1860: #endif /* IPNOPRIVPORTS */
1.73 atatat 1861: sysctl_createv(clog, 0, NULL, NULL,
1862: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1863: CTLTYPE_INT, "use_tempaddr",
1864: SYSCTL_DESCR("Use temporary address"),
1865: NULL, 0, &ip6_use_tempaddr, 0,
1866: CTL_NET, PF_INET6, IPPROTO_IPV6,
1867: CTL_CREATE, CTL_EOL);
1868: sysctl_createv(clog, 0, NULL, NULL,
1869: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1870: CTLTYPE_INT, "temppltime",
1871: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1872: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1873: CTL_NET, PF_INET6, IPPROTO_IPV6,
1874: CTL_CREATE, CTL_EOL);
1875: sysctl_createv(clog, 0, NULL, NULL,
1876: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1877: CTLTYPE_INT, "tempvltime",
1878: SYSCTL_DESCR("valid lifetime of a temporary address"),
1879: NULL, 0, &ip6_temp_valid_lifetime, 0,
1880: CTL_NET, PF_INET6, IPPROTO_IPV6,
1881: CTL_CREATE, CTL_EOL);
1882: sysctl_createv(clog, 0, NULL, NULL,
1883: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1884: CTLTYPE_INT, "maxfrags",
1885: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1886: NULL, 0, &ip6_maxfrags, 0,
1887: CTL_NET, PF_INET6, IPPROTO_IPV6,
1888: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1889: sysctl_createv(clog, 0, NULL, NULL,
1890: CTLFLAG_PERMANENT,
1891: CTLTYPE_STRUCT, "stats",
1892: SYSCTL_DESCR("IPv6 statistics"),
1893: NULL, 0, &ip6stat, sizeof(ip6stat),
1894: CTL_NET, PF_INET6, IPPROTO_IPV6,
1895: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1896: sysctl_createv(clog, 0, NULL, NULL,
1897: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1898: CTLTYPE_INT, "use_defaultzone",
1899: SYSCTL_DESCR("Whether to use the default scope zones"),
1900: NULL, 0, &ip6_use_defzone, 0,
1901: CTL_NET, PF_INET6, IPPROTO_IPV6,
1902: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1903: sysctl_createv(clog, 0, NULL, NULL,
1904: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1905: CTLTYPE_INT, "mcast_pmtu",
1906: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1907: NULL, 0, &ip6_mcast_pmtu, 0,
1908: CTL_NET, PF_INET6, IPPROTO_IPV6,
1909: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1910: #ifdef GATEWAY
1911: sysctl_createv(clog, 0, NULL, NULL,
1912: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1913: CTLTYPE_INT, "maxflows",
1914: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.98.2.1 ad 1915: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1916: CTL_NET, PF_INET6, IPPROTO_IPV6,
1917: CTL_CREATE, CTL_EOL);
1918: sysctl_createv(clog, 0, NULL, NULL,
1919: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1920: CTLTYPE_INT, "hashsize",
1921: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1922: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1.98 liamjfoy 1923: CTL_NET, PF_INET6, IPPROTO_IPV6,
1924: CTL_CREATE, CTL_EOL);
1925: #endif
1.2 itojun 1926: }
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