Annotation of src/sys/netinet6/ip6_input.c, Revision 1.164.2.2
1.164.2.2! pgoyette 1: /* $NetBSD: ip6_input.c,v 1.170 2016/11/01 10:32:57 ozaki-r 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>
1.164.2.2! pgoyette 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.170 2016/11/01 10:32:57 ozaki-r Exp $");
1.2 itojun 66:
1.152 pooka 67: #ifdef _KERNEL_OPT
1.129 joerg 68: #include "opt_gateway.h"
1.2 itojun 69: #include "opt_inet.h"
1.85 rpaulo 70: #include "opt_inet6.h"
1.4 thorpej 71: #include "opt_ipsec.h"
1.123 christos 72: #include "opt_compat_netbsd.h"
1.164.2.2! pgoyette 73: #include "opt_net_mpsafe.h"
1.152 pooka 74: #endif
1.2 itojun 75:
76: #include <sys/param.h>
77: #include <sys/systm.h>
78: #include <sys/malloc.h>
79: #include <sys/mbuf.h>
80: #include <sys/domain.h>
81: #include <sys/protosw.h>
82: #include <sys/socket.h>
83: #include <sys/socketvar.h>
84: #include <sys/errno.h>
85: #include <sys/time.h>
86: #include <sys/kernel.h>
87: #include <sys/syslog.h>
88: #include <sys/proc.h>
1.46 simonb 89: #include <sys/sysctl.h>
1.133 tls 90: #include <sys/cprng.h>
1.2 itojun 91:
92: #include <net/if.h>
93: #include <net/if_types.h>
94: #include <net/if_dl.h>
95: #include <net/route.h>
1.148 rmind 96: #include <net/pktqueue.h>
1.15 darrenr 97: #include <net/pfil.h>
1.2 itojun 98:
99: #include <netinet/in.h>
1.9 itojun 100: #include <netinet/in_systm.h>
101: #ifdef INET
102: #include <netinet/ip.h>
1.148 rmind 103: #include <netinet/ip_var.h>
1.9 itojun 104: #include <netinet/ip_icmp.h>
1.45 itojun 105: #endif /* INET */
1.14 itojun 106: #include <netinet/ip6.h>
1.140 christos 107: #include <netinet/portalgo.h>
1.2 itojun 108: #include <netinet6/in6_var.h>
1.11 itojun 109: #include <netinet6/ip6_var.h>
1.116 thorpej 110: #include <netinet6/ip6_private.h>
1.2 itojun 111: #include <netinet6/in6_pcb.h>
1.14 itojun 112: #include <netinet/icmp6.h>
1.81 rpaulo 113: #include <netinet6/scope6_var.h>
1.2 itojun 114: #include <netinet6/in6_ifattach.h>
115: #include <netinet6/nd6.h>
116:
1.142 christos 117: #ifdef IPSEC
1.94 degroote 118: #include <netipsec/ipsec.h>
119: #include <netipsec/ipsec6.h>
120: #include <netipsec/key.h>
1.142 christos 121: #endif /* IPSEC */
1.94 degroote 122:
1.123 christos 123: #ifdef COMPAT_50
124: #include <compat/sys/time.h>
125: #include <compat/sys/socket.h>
126: #endif
127:
1.2 itojun 128: #include <netinet6/ip6protosw.h>
129:
130: #include "faith.h"
131:
1.9 itojun 132: #include <net/net_osdep.h>
133:
1.2 itojun 134: extern struct domain inet6domain;
135:
136: u_char ip6_protox[IPPROTO_MAX];
1.148 rmind 137: pktqueue_t *ip6_pktq __read_mostly;
1.2 itojun 138:
139: int ip6_forward_srcrt; /* XXX */
140: int ip6_sourcecheck; /* XXX */
141: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 142:
1.143 rmind 143: pfil_head_t *inet6_pfil_hook;
1.29 thorpej 144:
1.116 thorpej 145: percpu_t *ip6stat_percpu;
1.2 itojun 146:
1.156 ozaki-r 147: static void ip6_init2(void);
1.148 rmind 148: static void ip6intr(void *);
1.112 dyoung 149: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 150:
1.136 drochner 151: static int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
152: u_int32_t *);
1.111 dyoung 153: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.128 pooka 154: static void sysctl_net_inet6_ip6_setup(struct sysctllog **);
1.2 itojun 155:
1.164.2.2! pgoyette 156: #ifdef NET_MPSAFE
! 157: #define SOFTNET_LOCK() mutex_enter(softnet_lock)
! 158: #define SOFTNET_UNLOCK() mutex_exit(softnet_lock)
! 159: #else
! 160: #define SOFTNET_LOCK() KASSERT(mutex_owned(softnet_lock))
! 161: #define SOFTNET_UNLOCK() KASSERT(mutex_owned(softnet_lock))
! 162: #endif
! 163:
1.2 itojun 164: /*
165: * IP6 initialization: fill in IP6 protocol switch table.
166: * All protocols not implemented in kernel go to raw IP6 protocol handler.
167: */
168: void
1.114 matt 169: ip6_init(void)
1.2 itojun 170: {
1.78 christos 171: const struct ip6protosw *pr;
1.35 itojun 172: int i;
1.2 itojun 173:
1.163 ozaki-r 174: in6_init();
1.162 ozaki-r 175:
1.128 pooka 176: sysctl_net_inet6_ip6_setup(NULL);
1.78 christos 177: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 178: if (pr == 0)
179: panic("ip6_init");
180: for (i = 0; i < IPPROTO_MAX; i++)
181: ip6_protox[i] = pr - inet6sw;
1.78 christos 182: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
183: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 184: if (pr->pr_domain->dom_family == PF_INET6 &&
185: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
186: ip6_protox[pr->pr_protocol] = pr - inet6sw;
1.148 rmind 187:
1.149 ozaki-r 188: ip6_pktq = pktq_create(IFQ_MAXLEN, ip6intr, NULL);
1.148 rmind 189: KASSERT(ip6_pktq != NULL);
190:
1.81 rpaulo 191: scope6_init();
192: addrsel_policy_init();
1.2 itojun 193: nd6_init();
194: frag6_init();
1.133 tls 195: ip6_desync_factor = cprng_fast32() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 196:
1.156 ozaki-r 197: ip6_init2();
1.98 liamjfoy 198: #ifdef GATEWAY
1.99 liamjfoy 199: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 200: #endif
1.29 thorpej 201: /* Register our Packet Filter hook. */
1.143 rmind 202: inet6_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET6);
203: KASSERT(inet6_pfil_hook != NULL);
1.116 thorpej 204:
205: ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS);
1.2 itojun 206: }
207:
208: static void
1.156 ozaki-r 209: ip6_init2(void)
1.2 itojun 210: {
211:
1.83 rpaulo 212: /* timer for regeneranation of temporary addresses randomize ID */
1.118 ad 213: callout_init(&in6_tmpaddrtimer_ch, CALLOUT_MPSAFE);
1.83 rpaulo 214: callout_reset(&in6_tmpaddrtimer_ch,
215: (ip6_temp_preferred_lifetime - ip6_desync_factor -
216: ip6_temp_regen_advance) * hz,
217: in6_tmpaddrtimer, NULL);
1.2 itojun 218: }
219:
220: /*
221: * IP6 input interrupt handling. Just pass the packet to ip6_input.
222: */
1.148 rmind 223: static void
224: ip6intr(void *arg __unused)
1.2 itojun 225: {
226: struct mbuf *m;
227:
1.164.2.2! pgoyette 228: #ifndef NET_MPSAFE
1.118 ad 229: mutex_enter(softnet_lock);
1.164.2.2! pgoyette 230: #endif
1.148 rmind 231: while ((m = pktq_dequeue(ip6_pktq)) != NULL) {
1.160 ozaki-r 232: struct psref psref;
233: struct ifnet *rcvif = m_get_rcvif_psref(m, &psref);
1.148 rmind 234:
1.160 ozaki-r 235: if (rcvif == NULL) {
236: m_freem(m);
237: continue;
238: }
1.148 rmind 239: /*
240: * Drop the packet if IPv6 is disabled on the interface.
241: */
1.160 ozaki-r 242: if ((ND_IFINFO(rcvif)->flags & ND6_IFF_IFDISABLED)) {
243: m_put_rcvif_psref(rcvif, &psref);
1.83 rpaulo 244: m_freem(m);
1.148 rmind 245: continue;
1.83 rpaulo 246: }
1.160 ozaki-r 247: ip6_input(m, rcvif);
248: m_put_rcvif_psref(rcvif, &psref);
1.2 itojun 249: }
1.164.2.2! pgoyette 250: #ifndef NET_MPSAFE
1.118 ad 251: mutex_exit(softnet_lock);
1.164.2.2! pgoyette 252: #endif
1.2 itojun 253: }
254:
1.103 dyoung 255: extern struct route ip6_forward_rt;
1.2 itojun 256:
257: void
1.160 ozaki-r 258: ip6_input(struct mbuf *m, struct ifnet *rcvif)
1.2 itojun 259: {
1.9 itojun 260: struct ip6_hdr *ip6;
1.105 dyoung 261: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 262: u_int32_t plen;
1.5 itojun 263: u_int32_t rtalert = ~0;
1.104 yamt 264: int nxt, ours = 0, rh_present = 0;
1.9 itojun 265: struct ifnet *deliverifp = NULL;
1.64 itojun 266: int srcrt = 0;
1.105 dyoung 267: const struct rtentry *rt;
268: union {
269: struct sockaddr dst;
270: struct sockaddr_in6 dst6;
271: } u;
1.2 itojun 272:
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)
1.116 thorpej 283: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 284: else
1.116 thorpej 285: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 286: } else {
1.115 thorpej 287: #define M2MMAX 32
1.2 itojun 288: if (m->m_next) {
1.159 ozaki-r 289: if (m->m_flags & M_LOOP)
1.116 thorpej 290: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.159 ozaki-r 291: else if (rcvif->if_index < M2MMAX)
292: IP6_STATINC(IP6_STAT_M2M + rcvif->if_index);
293: else
1.116 thorpej 294: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 295: } else
1.116 thorpej 296: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 297: #undef M2MMAX
1.2 itojun 298: }
299:
1.159 ozaki-r 300: in6_ifstat_inc(rcvif, ifs6_in_receive);
1.116 thorpej 301: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 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: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
311: (max_linkhdr + 3) & ~3)) == NULL) {
312: /* XXXJRT new stat, please */
1.116 thorpej 313: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 314: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.57 thorpej 315: return;
316: }
317: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
1.55 itojun 318: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 319: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 320: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.9 itojun 321: return;
322: }
1.2 itojun 323: }
324:
325: ip6 = mtod(m, struct ip6_hdr *);
326:
327: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 328: IP6_STATINC(IP6_STAT_BADVERS);
1.159 ozaki-r 329: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 330: goto bad;
331: }
1.15 darrenr 332:
1.98 liamjfoy 333: /*
334: * Assume that we can create a fast-forward IP flow entry
335: * based on this packet.
336: */
337: m->m_flags |= M_CANFASTFWD;
338:
1.15 darrenr 339: /*
340: * Run through list of hooks for input packets. If there are any
341: * filters which require that additional packets in the flow are
342: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
343: * Note that filters must _never_ set this flag, as another filter
344: * in the list may have previously cleared it.
345: */
1.39 itojun 346: /*
347: * let ipfilter look at packet on the wire,
348: * not the decapsulated packet.
349: */
1.142 christos 350: #if defined(IPSEC)
1.146 christos 351: if (!ipsec_used || !ipsec_indone(m))
1.39 itojun 352: #else
353: if (1)
354: #endif
355: {
1.64 itojun 356: struct in6_addr odst;
357:
358: odst = ip6->ip6_dst;
1.159 ozaki-r 359: if (pfil_run_hooks(inet6_pfil_hook, &m, rcvif, PFIL_IN) != 0)
1.39 itojun 360: return;
361: if (m == NULL)
362: return;
363: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 364: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 365: }
1.15 darrenr 366:
1.116 thorpej 367: IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt);
1.2 itojun 368:
1.30 thorpej 369: #ifdef ALTQ
1.164.2.2! pgoyette 370: if (altq_input != NULL) {
! 371: SOFTNET_LOCK();
! 372: if ((*altq_input)(m, AF_INET6) == 0) {
! 373: SOFTNET_UNLOCK();
! 374: /* packet is dropped by traffic conditioner */
! 375: return;
! 376: }
! 377: SOFTNET_UNLOCK();
1.9 itojun 378: }
379: #endif
380:
1.2 itojun 381: /*
1.44 itojun 382: * Check against address spoofing/corruption.
1.2 itojun 383: */
384: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
385: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 386: /*
387: * XXX: "badscope" is not very suitable for a multicast source.
388: */
1.116 thorpej 389: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 390: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.2 itojun 391: goto bad;
392: }
1.13 itojun 393: /*
1.44 itojun 394: * The following check is not documented in specs. A malicious
395: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
396: * and bypass security checks (act as if it was from 127.0.0.1 by using
397: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 398: *
1.44 itojun 399: * This check chokes if we are in an SIIT cloud. As none of BSDs
400: * support IPv4-less kernel compilation, we cannot support SIIT
401: * environment at all. So, it makes more sense for us to reject any
402: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 403: * partial support for SIIT environment.
1.13 itojun 404: */
405: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
406: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 407: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 408: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 409: goto bad;
410: }
1.17 itojun 411: #if 0
1.13 itojun 412: /*
1.17 itojun 413: * Reject packets with IPv4 compatible addresses (auto tunnel).
414: *
415: * The code forbids auto tunnel relay case in RFC1933 (the check is
416: * stronger than RFC1933). We may want to re-enable it if mech-xx
417: * is revised to forbid relaying case.
1.13 itojun 418: */
419: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
420: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
1.116 thorpej 421: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 422: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 423: goto bad;
424: }
425: #endif
1.35 itojun 426:
1.2 itojun 427: /*
1.82 yamt 428: * Disambiguate address scope zones (if there is ambiguity).
429: * We first make sure that the original source or destination address
430: * is not in our internal form for scoped addresses. Such addresses
431: * are not necessarily invalid spec-wise, but we cannot accept them due
432: * to the usage conflict.
433: * in6_setscope() then also checks and rejects the cases where src or
434: * dst are the loopback address and the receiving interface
435: * is not loopback.
436: */
1.88 bouyer 437: if (__predict_false(
438: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
439: goto bad;
440: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 441: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 442: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 443: goto bad;
444: }
1.159 ozaki-r 445: if (in6_setscope(&ip6->ip6_src, rcvif, NULL) ||
446: in6_setscope(&ip6->ip6_dst, rcvif, NULL)) {
1.116 thorpej 447: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 448: goto bad;
449: }
450:
451: /*
1.2 itojun 452: * Multicast check
453: */
454: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
455: struct in6_multi *in6m = 0;
1.9 itojun 456:
1.159 ozaki-r 457: in6_ifstat_inc(rcvif, ifs6_in_mcast);
1.2 itojun 458: /*
459: * See if we belong to the destination multicast group on the
460: * arrival interface.
461: */
1.159 ozaki-r 462: IN6_LOOKUP_MULTI(ip6->ip6_dst, rcvif, in6m);
1.2 itojun 463: if (in6m)
464: ours = 1;
465: else if (!ip6_mrouter) {
1.116 thorpej 466: uint64_t *ip6s = IP6_STAT_GETREF();
467: ip6s[IP6_STAT_NOTMEMBER]++;
468: ip6s[IP6_STAT_CANTFORWARD]++;
469: IP6_STAT_PUTREF();
1.159 ozaki-r 470: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.2 itojun 471: goto bad;
472: }
1.159 ozaki-r 473: deliverifp = rcvif;
1.2 itojun 474: goto hbhcheck;
475: }
476:
1.105 dyoung 477: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
478:
1.2 itojun 479: /*
480: * Unicast check
481: */
1.105 dyoung 482: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
483: if (hit)
1.116 thorpej 484: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 485: else
1.116 thorpej 486: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 487:
1.109 dyoung 488: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 489:
490: /*
491: * Accept the packet if the forwarding interface to the destination
492: * according to the routing table is the loopback interface,
493: * unless the associated route has a gateway.
494: * Note that this approach causes to accept a packet if there is a
495: * route to the loopback interface for the destination of the packet.
496: * But we think it's even useful in some situations, e.g. when using
497: * a special daemon which wants to intercept the packet.
498: */
1.105 dyoung 499: if (rt != NULL &&
500: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.2 itojun 501: #if 0
502: /*
503: * The check below is redundant since the comparison of
504: * the destination and the key of the rtentry has
505: * already done through looking up the routing table.
506: */
1.109 dyoung 507: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 508: #endif
1.105 dyoung 509: rt->rt_ifp->if_type == IFT_LOOP) {
510: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 511: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
512: m->m_flags |= M_ANYCAST6;
1.24 itojun 513: /*
514: * packets to a tentative, duplicated, or somehow invalid
515: * address must not be accepted.
516: */
1.2 itojun 517: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 518: /* this address is ready */
1.2 itojun 519: ours = 1;
1.9 itojun 520: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 521: goto hbhcheck;
522: } else {
1.24 itojun 523: /* address is not ready, so discard the packet. */
1.157 ozaki-r 524: nd6log(LOG_INFO, "packet to an unready address %s->%s\n",
1.24 itojun 525: ip6_sprintf(&ip6->ip6_src),
1.157 ozaki-r 526: ip6_sprintf(&ip6->ip6_dst));
1.24 itojun 527:
528: goto bad;
1.2 itojun 529: }
530: }
531:
532: /*
1.55 itojun 533: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 534: */
535: #if defined(NFAITH) && 0 < NFAITH
536: if (ip6_keepfaith) {
1.105 dyoung 537: if (rt != NULL && rt->rt_ifp != NULL &&
538: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 539: /* XXX do we need more sanity checks? */
540: ours = 1;
1.105 dyoung 541: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 542: goto hbhcheck;
543: }
544: }
545: #endif
546:
547: #if 0
548: {
549: /*
550: * Last resort: check in6_ifaddr for incoming interface.
551: * The code is here until I update the "goto ours hack" code above
552: * working right.
553: */
554: struct ifaddr *ifa;
1.164 ozaki-r 555: IFADDR_READER_FOREACH(ifa, rcvif) {
1.9 itojun 556: if (ifa->ifa_addr->sa_family != AF_INET6)
557: continue;
558: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
559: ours = 1;
560: deliverifp = ifa->ifa_ifp;
1.2 itojun 561: goto hbhcheck;
562: }
563: }
1.9 itojun 564: }
1.2 itojun 565: #endif
566:
567: /*
568: * Now there is no reason to process the packet if it's not our own
569: * and we're not a router.
570: */
571: if (!ip6_forwarding) {
1.116 thorpej 572: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.159 ozaki-r 573: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.2 itojun 574: goto bad;
575: }
576:
577: hbhcheck:
578: /*
1.81 rpaulo 579: * record address information into m_tag, if we don't have one yet.
580: * note that we are unable to record it, if the address is not listed
581: * as our interface address (e.g. multicast addresses, addresses
582: * within FAITH prefixes and such).
583: */
1.111 dyoung 584: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 585: struct in6_ifaddr *ia6;
1.164.2.1 pgoyette 586: int s = pserialize_read_enter();
1.81 rpaulo 587:
588: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.164.2.1 pgoyette 589: /* Depends on ip6_setdstifaddr never sleep */
1.111 dyoung 590: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
591: /*
592: * XXX maybe we should drop the packet here,
593: * as we could not provide enough information
594: * to the upper layers.
595: */
1.81 rpaulo 596: }
1.164.2.1 pgoyette 597: pserialize_read_exit(s);
1.81 rpaulo 598: }
599:
600: /*
1.2 itojun 601: * Process Hop-by-Hop options header if it's contained.
602: * m may be modified in ip6_hopopts_input().
603: * If a JumboPayload option is included, plen will also be modified.
604: */
605: plen = (u_int32_t)ntohs(ip6->ip6_plen);
606: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 607: struct ip6_hbh *hbh;
608:
609: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
610: #if 0 /*touches NULL pointer*/
1.159 ozaki-r 611: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.9 itojun 612: #endif
1.2 itojun 613: return; /* m have already been freed */
1.9 itojun 614: }
1.22 itojun 615:
1.2 itojun 616: /* adjust pointer */
617: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 618:
619: /*
1.49 itojun 620: * if the payload length field is 0 and the next header field
1.22 itojun 621: * indicates Hop-by-Hop Options header, then a Jumbo Payload
622: * option MUST be included.
623: */
624: if (ip6->ip6_plen == 0 && plen == 0) {
625: /*
626: * Note that if a valid jumbo payload option is
1.83 rpaulo 627: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 628: * (non-zero) payload length to the variable plen.
1.22 itojun 629: */
1.116 thorpej 630: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.159 ozaki-r 631: in6_ifstat_inc(rcvif, ifs6_in_discard);
632: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.22 itojun 633: icmp6_error(m, ICMP6_PARAM_PROB,
634: ICMP6_PARAMPROB_HEADER,
1.97 christos 635: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 636: return;
637: }
1.9 itojun 638: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
639: sizeof(struct ip6_hbh));
640: if (hbh == NULL) {
1.116 thorpej 641: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 642: return;
643: }
1.57 thorpej 644: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 645: nxt = hbh->ip6h_nxt;
1.2 itojun 646:
647: /*
648: * accept the packet if a router alert option is included
649: * and we act as an IPv6 router.
650: */
1.5 itojun 651: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 652: ours = 1;
653: } else
654: nxt = ip6->ip6_nxt;
655:
656: /*
657: * Check that the amount of data in the buffers
658: * is as at least much as the IPv6 header would have us expect.
659: * Trim mbufs if longer than we expect.
660: * Drop packet if shorter than we expect.
661: */
662: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 663: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 664: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.2 itojun 665: goto bad;
666: }
667: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
668: if (m->m_len == m->m_pkthdr.len) {
669: m->m_len = sizeof(struct ip6_hdr) + plen;
670: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
671: } else
672: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
673: }
674:
675: /*
676: * Forward if desirable.
677: */
678: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
679: /*
680: * If we are acting as a multicast router, all
681: * incoming multicast packets are passed to the
682: * kernel-level multicast forwarding function.
683: * The packet is returned (relatively) intact; if
684: * ip6_mforward() returns a non-zero value, the packet
685: * must be discarded, else it may be accepted below.
686: */
1.164.2.2! pgoyette 687: if (ip6_mrouter != NULL) {
! 688: int error;
! 689:
! 690: SOFTNET_LOCK();
! 691: error = ip6_mforward(ip6, rcvif, m);
! 692: SOFTNET_UNLOCK();
! 693:
! 694: if (error != 0) {
! 695: IP6_STATINC(IP6_STAT_CANTFORWARD);
! 696: goto bad;
! 697: }
1.2 itojun 698: }
1.164.2.2! pgoyette 699: if (!ours)
! 700: goto bad;
1.22 itojun 701: } else if (!ours) {
1.64 itojun 702: ip6_forward(m, srcrt);
1.2 itojun 703: return;
1.56 itojun 704: }
1.25 itojun 705:
706: ip6 = mtod(m, struct ip6_hdr *);
707:
708: /*
709: * Malicious party may be able to use IPv4 mapped addr to confuse
710: * tcp/udp stack and bypass security checks (act as if it was from
711: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
712: *
713: * For SIIT end node behavior, you may want to disable the check.
714: * However, you will become vulnerable to attacks using IPv4 mapped
715: * source.
716: */
717: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
718: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 719: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 720: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.25 itojun 721: goto bad;
722: }
1.2 itojun 723:
724: /*
725: * Tell launch routine the next header
726: */
1.12 itojun 727: #ifdef IFA_STATS
1.28 itojun 728: if (deliverifp != NULL) {
1.9 itojun 729: struct in6_ifaddr *ia6;
1.164.2.1 pgoyette 730: int s = pserialize_read_enter();
1.9 itojun 731: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
732: if (ia6)
733: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
1.164.2.1 pgoyette 734: pserialize_read_exit(s);
1.9 itojun 735: }
736: #endif
1.116 thorpej 737: IP6_STATINC(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)) {
1.116 thorpej 744: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.159 ozaki-r 745: in6_ifstat_inc(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) {
1.116 thorpej 754: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 755: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.8 itojun 756: goto bad;
757: }
758:
1.104 yamt 759: if (nxt == IPPROTO_ROUTING) {
760: if (rh_present++) {
1.159 ozaki-r 761: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.116 thorpej 762: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 763: goto bad;
764: }
765: }
766:
1.142 christos 767: #ifdef IPSEC
1.146 christos 768: if (ipsec_used) {
1.94 degroote 769: /*
1.146 christos 770: * enforce IPsec policy checking if we are seeing last
771: * header. note that we do not visit this with
772: * protocols with pcb layer code - like udp/tcp/raw ip.
1.94 degroote 773: */
1.146 christos 774: if ((inet6sw[ip_protox[nxt]].pr_flags
775: & PR_LASTHDR) != 0) {
1.164.2.2! pgoyette 776: int error;
! 777:
! 778: SOFTNET_LOCK();
! 779: error = ipsec6_input(m);
! 780: SOFTNET_UNLOCK();
1.146 christos 781: if (error)
782: goto bad;
783: }
1.94 degroote 784: }
1.142 christos 785: #endif /* IPSEC */
1.94 degroote 786:
1.164.2.2! pgoyette 787: SOFTNET_LOCK();
1.2 itojun 788: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
1.164.2.2! pgoyette 789: SOFTNET_UNLOCK();
1.2 itojun 790: }
791: return;
792: bad:
793: m_freem(m);
794: }
795:
796: /*
1.81 rpaulo 797: * set/grab in6_ifaddr correspond to IPv6 destination address.
798: */
799: static struct m_tag *
1.112 dyoung 800: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 801: {
802: struct m_tag *mtag;
1.144 christos 803: struct ip6aux *ip6a;
1.81 rpaulo 804:
805: mtag = ip6_addaux(m);
1.144 christos 806: if (mtag == NULL)
807: return NULL;
1.112 dyoung 808:
1.144 christos 809: ip6a = (struct ip6aux *)(mtag + 1);
810: if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) {
811: IP6_STATINC(IP6_STAT_BADSCOPE);
812: return NULL;
1.112 dyoung 813: }
1.144 christos 814:
815: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
816: ip6a->ip6a_flags = ia->ia6_flags;
817: return mtag;
1.81 rpaulo 818: }
819:
1.112 dyoung 820: const struct ip6aux *
1.107 christos 821: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 822: {
823: struct m_tag *mtag;
824:
825: mtag = ip6_findaux(m);
1.112 dyoung 826: if (mtag != NULL)
827: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 828: else
829: return NULL;
830: }
831:
832: /*
1.2 itojun 833: * Hop-by-Hop options header processing. If a valid jumbo payload option is
834: * included, the real payload length will be stored in plenp.
1.107 christos 835: *
836: * rtalertp - XXX: should be stored more smart way
1.2 itojun 837: */
1.136 drochner 838: int
1.107 christos 839: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
840: struct mbuf **mp, int *offp)
1.2 itojun 841: {
1.35 itojun 842: struct mbuf *m = *mp;
1.2 itojun 843: int off = *offp, hbhlen;
844: struct ip6_hbh *hbh;
845:
846: /* validation of the length of the header */
1.9 itojun 847: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
848: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
849: if (hbh == NULL) {
1.116 thorpej 850: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 851: return -1;
852: }
853: hbhlen = (hbh->ip6h_len + 1) << 3;
854: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
855: hbhlen);
856: if (hbh == NULL) {
1.116 thorpej 857: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 858: return -1;
859: }
1.57 thorpej 860: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 861: off += hbhlen;
862: hbhlen -= sizeof(struct ip6_hbh);
863:
864: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
865: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 866: return (-1);
1.2 itojun 867:
868: *offp = off;
869: *mp = m;
1.58 itojun 870: return (0);
1.2 itojun 871: }
872:
873: /*
874: * Search header for all Hop-by-hop options and process each option.
875: * This function is separate from ip6_hopopts_input() in order to
876: * handle a case where the sending node itself process its hop-by-hop
877: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 878: *
879: * The function assumes that hbh header is located right after the IPv6 header
880: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
881: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 882: */
1.136 drochner 883: static int
1.107 christos 884: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
885: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 886: {
887: struct ip6_hdr *ip6;
888: int optlen = 0;
889: u_int8_t *opt = opthead;
890: u_int16_t rtalert_val;
1.22 itojun 891: u_int32_t jumboplen;
1.55 itojun 892: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 893:
894: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 895: switch (*opt) {
896: case IP6OPT_PAD1:
897: optlen = 1;
898: break;
899: case IP6OPT_PADN:
900: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 901: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 902: goto bad;
903: }
904: optlen = *(opt + 1) + 2;
905: break;
906: case IP6OPT_RTALERT:
907: /* XXX may need check for alignment */
908: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 909: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 910: goto bad;
911: }
912: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 913: /* XXX stat */
914: icmp6_error(m, ICMP6_PARAM_PROB,
915: ICMP6_PARAMPROB_HEADER,
916: erroff + opt + 1 - opthead);
917: return (-1);
1.35 itojun 918: }
919: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 920: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 921: *rtalertp = ntohs(rtalert_val);
922: break;
923: case IP6OPT_JUMBO:
1.22 itojun 924: /* XXX may need check for alignment */
925: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 926: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 927: goto bad;
928: }
1.35 itojun 929: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 930: /* XXX stat */
931: icmp6_error(m, ICMP6_PARAM_PROB,
932: ICMP6_PARAMPROB_HEADER,
933: erroff + opt + 1 - opthead);
934: return (-1);
1.35 itojun 935: }
1.22 itojun 936: optlen = IP6OPT_JUMBO_LEN;
937:
938: /*
939: * IPv6 packets that have non 0 payload length
1.35 itojun 940: * must not contain a jumbo payload option.
1.22 itojun 941: */
942: ip6 = mtod(m, struct ip6_hdr *);
943: if (ip6->ip6_plen) {
1.116 thorpej 944: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 945: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 946: ICMP6_PARAMPROB_HEADER,
947: erroff + opt - opthead);
948: return (-1);
1.22 itojun 949: }
1.2 itojun 950:
1.22 itojun 951: /*
952: * We may see jumbolen in unaligned location, so
953: * we'd need to perform bcopy().
954: */
1.126 tsutsui 955: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 956: jumboplen = (u_int32_t)htonl(jumboplen);
957:
958: #if 1
959: /*
960: * if there are multiple jumbo payload options,
961: * *plenp will be non-zero and the packet will be
962: * rejected.
963: * the behavior may need some debate in ipngwg -
964: * multiple options does not make sense, however,
965: * there's no explicit mention in specification.
966: */
967: if (*plenp != 0) {
1.116 thorpej 968: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 969: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 970: ICMP6_PARAMPROB_HEADER,
971: erroff + opt + 2 - opthead);
972: return (-1);
1.22 itojun 973: }
1.8 itojun 974: #endif
1.2 itojun 975:
1.22 itojun 976: /*
977: * jumbo payload length must be larger than 65535.
978: */
979: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 980: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 981: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 982: ICMP6_PARAMPROB_HEADER,
983: erroff + opt + 2 - opthead);
984: return (-1);
1.22 itojun 985: }
986: *plenp = jumboplen;
987:
988: break;
1.35 itojun 989: default: /* unknown option */
990: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 991: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 992: goto bad;
993: }
1.55 itojun 994: optlen = ip6_unknown_opt(opt, m,
995: erroff + opt - opthead);
996: if (optlen == -1)
997: return (-1);
1.35 itojun 998: optlen += 2;
999: break;
1.2 itojun 1000: }
1001: }
1002:
1.55 itojun 1003: return (0);
1.2 itojun 1004:
1005: bad:
1006: m_freem(m);
1.55 itojun 1007: return (-1);
1.2 itojun 1008: }
1009:
1010: /*
1011: * Unknown option processing.
1012: * The third argument `off' is the offset from the IPv6 header to the option,
1013: * which is necessary if the IPv6 header the and option header and IPv6 header
1014: * is not continuous in order to return an ICMPv6 error.
1015: */
1016: int
1.107 christos 1017: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1018: {
1019: struct ip6_hdr *ip6;
1020:
1.35 itojun 1021: switch (IP6OPT_TYPE(*optp)) {
1022: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1023: return ((int)*(optp + 1));
1.35 itojun 1024: case IP6OPT_TYPE_DISCARD: /* silently discard */
1025: m_freem(m);
1.58 itojun 1026: return (-1);
1.35 itojun 1027: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 1028: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1029: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1030: return (-1);
1.35 itojun 1031: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 1032: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1033: ip6 = mtod(m, struct ip6_hdr *);
1034: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1035: (m->m_flags & (M_BCAST|M_MCAST)))
1036: m_freem(m);
1037: else
1038: icmp6_error(m, ICMP6_PARAM_PROB,
1039: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1040: return (-1);
1.2 itojun 1041: }
1042:
1043: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1044: return (-1);
1.2 itojun 1045: }
1046:
1047: /*
1.9 itojun 1048: * Create the "control" list for this pcb.
1049: *
1050: * The routine will be called from upper layer handlers like tcp6_input().
1051: * Thus the routine assumes that the caller (tcp6_input) have already
1052: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1053: * very first mbuf on the mbuf chain.
1054: * We may want to add some infinite loop prevention or sanity checks for safety.
1055: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1056: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1057: */
1058: void
1.107 christos 1059: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1060: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1061: {
1.85 rpaulo 1062: #ifdef RFC2292
1063: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1064: #else
1065: #define IS2292(x, y) (y)
1066: #endif
1067:
1.123 christos 1068: if (in6p->in6p_socket->so_options & SO_TIMESTAMP
1069: #ifdef SO_OTIMESTAMP
1070: || in6p->in6p_socket->so_options & SO_OTIMESTAMP
1071: #endif
1072: ) {
1.2 itojun 1073: struct timeval tv;
1074:
1075: microtime(&tv);
1.123 christos 1076: #ifdef SO_OTIMESTAMP
1077: if (in6p->in6p_socket->so_options & SO_OTIMESTAMP) {
1078: struct timeval50 tv50;
1079: timeval_to_timeval50(&tv, &tv50);
1080: *mp = sbcreatecontrol((void *) &tv50, sizeof(tv50),
1081: SCM_OTIMESTAMP, SOL_SOCKET);
1082: } else
1083: #endif
1.97 christos 1084: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1085: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1086: if (*mp)
1087: mp = &(*mp)->m_next;
1088: }
1.87 rpaulo 1089:
1090: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1091: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1092: return;
1093:
1.2 itojun 1094: /* RFC 2292 sec. 5 */
1.35 itojun 1095: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1096: struct in6_pktinfo pi6;
1.85 rpaulo 1097:
1.126 tsutsui 1098: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1099: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.160 ozaki-r 1100: pi6.ipi6_ifindex = m->m_pkthdr.rcvif_index;
1.97 christos 1101: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1102: sizeof(struct in6_pktinfo),
1103: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1104: if (*mp)
1105: mp = &(*mp)->m_next;
1106: }
1.85 rpaulo 1107:
1.2 itojun 1108: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1109: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1110:
1.97 christos 1111: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1112: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1113: if (*mp)
1114: mp = &(*mp)->m_next;
1115: }
1116:
1117: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1118: u_int32_t flowinfo;
1119: int tclass;
1120:
1121: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1122: flowinfo >>= 20;
1123:
1124: tclass = flowinfo & 0xff;
1.97 christos 1125: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1126: IPV6_TCLASS, IPPROTO_IPV6);
1127:
1.2 itojun 1128: if (*mp)
1129: mp = &(*mp)->m_next;
1130: }
1131:
1132: /*
1.75 itojun 1133: * IPV6_HOPOPTS socket option. Recall that we required super-user
1134: * privilege for the option (see ip6_ctloutput), but it might be too
1135: * strict, since there might be some hop-by-hop options which can be
1136: * returned to normal user.
1.85 rpaulo 1137: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1138: */
1.75 itojun 1139: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1140: /*
1141: * Check if a hop-by-hop options header is contatined in the
1142: * received packet, and if so, store the options as ancillary
1143: * data. Note that a hop-by-hop options header must be
1144: * just after the IPv6 header, which fact is assured through
1145: * the IPv6 input processing.
1146: */
1.78 christos 1147: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1148: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1149: struct ip6_hbh *hbh;
1150: int hbhlen;
1.62 itojun 1151: struct mbuf *ext;
1.9 itojun 1152:
1.62 itojun 1153: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1154: xip6->ip6_nxt);
1.62 itojun 1155: if (ext == NULL) {
1.116 thorpej 1156: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1157: return;
1158: }
1.62 itojun 1159: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1160: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1161: if (hbhlen != ext->m_len) {
1162: m_freem(ext);
1.116 thorpej 1163: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1164: return;
1165: }
1.2 itojun 1166:
1167: /*
1168: * XXX: We copy whole the header even if a jumbo
1169: * payload option is included, which option is to
1170: * be removed before returning in the RFC 2292.
1.85 rpaulo 1171: * Note: this constraint is removed in RFC3542.
1.2 itojun 1172: */
1.97 christos 1173: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1174: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1175: IPPROTO_IPV6);
1.2 itojun 1176: if (*mp)
1177: mp = &(*mp)->m_next;
1.62 itojun 1178: m_freem(ext);
1.2 itojun 1179: }
1180: }
1181:
1182: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1183: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1184: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1185: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1186:
1187: /*
1188: * Search for destination options headers or routing
1189: * header(s) through the header chain, and stores each
1190: * header as ancillary data.
1191: * Note that the order of the headers remains in
1192: * the chain of ancillary data.
1193: */
1.86 rpaulo 1194: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1195: struct ip6_ext *ip6e = NULL;
1.9 itojun 1196: int elen;
1.62 itojun 1197: struct mbuf *ext = NULL;
1.9 itojun 1198:
1.62 itojun 1199: /*
1200: * if it is not an extension header, don't try to
1201: * pull it from the chain.
1202: */
1203: switch (nxt) {
1204: case IPPROTO_DSTOPTS:
1205: case IPPROTO_ROUTING:
1206: case IPPROTO_HOPOPTS:
1207: case IPPROTO_AH: /* is it possible? */
1208: break;
1209: default:
1210: goto loopend;
1211: }
1212:
1213: ext = ip6_pullexthdr(m, off, nxt);
1214: if (ext == NULL) {
1.116 thorpej 1215: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1216: return;
1217: }
1.62 itojun 1218: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1219: if (nxt == IPPROTO_AH)
1220: elen = (ip6e->ip6e_len + 2) << 2;
1221: else
1222: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1223: if (elen != ext->m_len) {
1224: m_freem(ext);
1.116 thorpej 1225: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1226: return;
1227: }
1.57 thorpej 1228: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1229:
1.35 itojun 1230: switch (nxt) {
1.62 itojun 1231: case IPPROTO_DSTOPTS:
1.127 martin 1232: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1233: break;
1234:
1.97 christos 1235: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1236: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1237: IPPROTO_IPV6);
1.35 itojun 1238: if (*mp)
1239: mp = &(*mp)->m_next;
1240: break;
1241:
1242: case IPPROTO_ROUTING:
1.127 martin 1243: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1244: break;
1245:
1.97 christos 1246: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1247: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1248: IPPROTO_IPV6);
1.35 itojun 1249: if (*mp)
1250: mp = &(*mp)->m_next;
1251: break;
1252:
1.62 itojun 1253: case IPPROTO_HOPOPTS:
1254: case IPPROTO_AH: /* is it possible? */
1255: break;
1256:
1.35 itojun 1257: default:
1258: /*
1.62 itojun 1259: * other cases have been filtered in the above.
1260: * none will visit this case. here we supply
1261: * the code just in case (nxt overwritten or
1262: * other cases).
1.35 itojun 1263: */
1.62 itojun 1264: m_freem(ext);
1.35 itojun 1265: goto loopend;
1266:
1.2 itojun 1267: }
1268:
1269: /* proceed with the next header. */
1.9 itojun 1270: off += elen;
1.2 itojun 1271: nxt = ip6e->ip6e_nxt;
1.62 itojun 1272: ip6e = NULL;
1273: m_freem(ext);
1274: ext = NULL;
1.2 itojun 1275: }
1276: loopend:
1.62 itojun 1277: ;
1.2 itojun 1278: }
1.62 itojun 1279: }
1.85 rpaulo 1280: #undef IS2292
1281:
1282:
1283: void
1.95 dyoung 1284: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1285: uint32_t *mtu)
1.85 rpaulo 1286: {
1287: struct socket *so;
1288: struct mbuf *m_mtu;
1289: struct ip6_mtuinfo mtuctl;
1290:
1291: so = in6p->in6p_socket;
1292:
1293: if (mtu == NULL)
1294: return;
1295:
1296: #ifdef DIAGNOSTIC
1297: if (so == NULL) /* I believe this is impossible */
1298: panic("ip6_notify_pmtu: socket is NULL");
1299: #endif
1300:
1301: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1302: mtuctl.ip6m_mtu = *mtu;
1303: mtuctl.ip6m_addr = *dst;
1304: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1305: return;
1306:
1.97 christos 1307: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1308: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1309: return;
1310:
1.95 dyoung 1311: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1312: == 0) {
1313: m_freem(m_mtu);
1314: /* XXX: should count statistics */
1315: } else
1316: sorwakeup(so);
1317:
1318: return;
1319: }
1.62 itojun 1320:
1321: /*
1322: * pull single extension header from mbuf chain. returns single mbuf that
1323: * contains the result, or NULL on error.
1324: */
1325: static struct mbuf *
1.107 christos 1326: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1327: {
1328: struct ip6_ext ip6e;
1329: size_t elen;
1330: struct mbuf *n;
1331:
1332: #ifdef DIAGNOSTIC
1333: switch (nxt) {
1334: case IPPROTO_DSTOPTS:
1335: case IPPROTO_ROUTING:
1336: case IPPROTO_HOPOPTS:
1337: case IPPROTO_AH: /* is it possible? */
1338: break;
1339: default:
1340: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1341: }
1.62 itojun 1342: #endif
1.2 itojun 1343:
1.97 christos 1344: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1345: if (nxt == IPPROTO_AH)
1346: elen = (ip6e.ip6e_len + 2) << 2;
1347: else
1348: elen = (ip6e.ip6e_len + 1) << 3;
1349:
1350: MGET(n, M_DONTWAIT, MT_DATA);
1351: if (n && elen >= MLEN) {
1352: MCLGET(n, M_DONTWAIT);
1353: if ((n->m_flags & M_EXT) == 0) {
1354: m_free(n);
1355: n = NULL;
1356: }
1357: }
1358: if (!n)
1359: return NULL;
1360:
1361: n->m_len = 0;
1362: if (elen >= M_TRAILINGSPACE(n)) {
1363: m_free(n);
1364: return NULL;
1365: }
1366:
1.97 christos 1367: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1368: n->m_len = elen;
1369: return n;
1.2 itojun 1370: }
1371:
1372: /*
1373: * Get pointer to the previous header followed by the header
1374: * currently processed.
1375: * XXX: This function supposes that
1376: * M includes all headers,
1377: * the next header field and the header length field of each header
1378: * are valid, and
1379: * the sum of each header length equals to OFF.
1380: * Because of these assumptions, this function must be called very
1381: * carefully. Moreover, it will not be used in the near future when
1382: * we develop `neater' mechanism to process extension headers.
1383: */
1.58 itojun 1384: u_int8_t *
1.107 christos 1385: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1386: {
1387: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1388:
1389: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1390: return (&ip6->ip6_nxt);
1.2 itojun 1391: else {
1392: int len, nxt;
1393: struct ip6_ext *ip6e = NULL;
1394:
1395: nxt = ip6->ip6_nxt;
1396: len = sizeof(struct ip6_hdr);
1397: while (len < off) {
1.97 christos 1398: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1399:
1.35 itojun 1400: switch (nxt) {
1.2 itojun 1401: case IPPROTO_FRAGMENT:
1402: len += sizeof(struct ip6_frag);
1403: break;
1404: case IPPROTO_AH:
1405: len += (ip6e->ip6e_len + 2) << 2;
1406: break;
1407: default:
1408: len += (ip6e->ip6e_len + 1) << 3;
1409: break;
1410: }
1411: nxt = ip6e->ip6e_nxt;
1412: }
1413: if (ip6e)
1.58 itojun 1414: return (&ip6e->ip6e_nxt);
1.2 itojun 1415: else
1416: return NULL;
1.18 itojun 1417: }
1418: }
1419:
1420: /*
1421: * get next header offset. m will be retained.
1422: */
1423: int
1.107 christos 1424: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1425: {
1426: struct ip6_hdr ip6;
1427: struct ip6_ext ip6e;
1428: struct ip6_frag fh;
1429:
1430: /* just in case */
1431: if (m == NULL)
1432: panic("ip6_nexthdr: m == NULL");
1433: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1434: return -1;
1435:
1436: switch (proto) {
1437: case IPPROTO_IPV6:
1.83 rpaulo 1438: /* do not chase beyond intermediate IPv6 headers */
1439: if (off != 0)
1440: return -1;
1.18 itojun 1441: if (m->m_pkthdr.len < off + sizeof(ip6))
1442: return -1;
1.97 christos 1443: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1444: if (nxtp)
1445: *nxtp = ip6.ip6_nxt;
1446: off += sizeof(ip6);
1447: return off;
1448:
1449: case IPPROTO_FRAGMENT:
1450: /*
1451: * terminate parsing if it is not the first fragment,
1452: * it does not make sense to parse through it.
1453: */
1454: if (m->m_pkthdr.len < off + sizeof(fh))
1455: return -1;
1.97 christos 1456: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1457: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1458: return -1;
1459: if (nxtp)
1460: *nxtp = fh.ip6f_nxt;
1461: off += sizeof(struct ip6_frag);
1462: return off;
1463:
1464: case IPPROTO_AH:
1465: if (m->m_pkthdr.len < off + sizeof(ip6e))
1466: return -1;
1.97 christos 1467: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1468: if (nxtp)
1469: *nxtp = ip6e.ip6e_nxt;
1470: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1471: if (m->m_pkthdr.len < off)
1472: return -1;
1.18 itojun 1473: return off;
1474:
1475: case IPPROTO_HOPOPTS:
1476: case IPPROTO_ROUTING:
1477: case IPPROTO_DSTOPTS:
1478: if (m->m_pkthdr.len < off + sizeof(ip6e))
1479: return -1;
1.97 christos 1480: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1481: if (nxtp)
1482: *nxtp = ip6e.ip6e_nxt;
1483: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1484: if (m->m_pkthdr.len < off)
1485: return -1;
1.18 itojun 1486: return off;
1487:
1488: case IPPROTO_NONE:
1489: case IPPROTO_ESP:
1490: case IPPROTO_IPCOMP:
1491: /* give up */
1492: return -1;
1493:
1494: default:
1495: return -1;
1496: }
1497: }
1498:
1499: /*
1500: * get offset for the last header in the chain. m will be kept untainted.
1501: */
1502: int
1.107 christos 1503: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1504: {
1505: int newoff;
1506: int nxt;
1507:
1508: if (!nxtp) {
1509: nxt = -1;
1510: nxtp = &nxt;
1511: }
1.86 rpaulo 1512: for (;;) {
1.18 itojun 1513: newoff = ip6_nexthdr(m, off, proto, nxtp);
1514: if (newoff < 0)
1515: return off;
1516: else if (newoff < off)
1517: return -1; /* invalid */
1518: else if (newoff == off)
1519: return newoff;
1520:
1521: off = newoff;
1522: proto = *nxtp;
1.2 itojun 1523: }
1524: }
1525:
1.81 rpaulo 1526: struct m_tag *
1.107 christos 1527: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1528: {
1529: struct m_tag *mtag;
1530:
1531: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1532: if (!mtag) {
1533: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1534: M_NOWAIT);
1535: if (mtag) {
1536: m_tag_prepend(m, mtag);
1.124 cegger 1537: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1538: }
1539: }
1540: return mtag;
1541: }
1542:
1543: struct m_tag *
1.107 christos 1544: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1545: {
1546: struct m_tag *mtag;
1547:
1548: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1549: return mtag;
1550: }
1551:
1552: void
1.107 christos 1553: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1554: {
1555: struct m_tag *mtag;
1556:
1557: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1558: if (mtag)
1559: m_tag_delete(m, mtag);
1560: }
1561:
1.2 itojun 1562: /*
1563: * System control for IP6
1564: */
1565:
1.120 matt 1566: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1567: 0, 0, 0, 0,
1568: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1569: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1570: EMSGSIZE, EHOSTUNREACH, 0, 0,
1571: 0, 0, 0, 0,
1572: ENOPROTOOPT
1573: };
1574:
1.153 christos 1575: extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS);
1576:
1.116 thorpej 1577: static int
1578: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1579: {
1580:
1.119 thorpej 1581: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1582: }
1583:
1.128 pooka 1584: static void
1585: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1586: {
1.85 rpaulo 1587: #ifdef RFC2292
1588: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1589: #else
1590: #define IS2292(x, y) (y)
1591: #endif
1.26 itojun 1592:
1.73 atatat 1593: sysctl_createv(clog, 0, NULL, NULL,
1594: CTLFLAG_PERMANENT,
1.74 atatat 1595: CTLTYPE_NODE, "inet6",
1596: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1597: NULL, 0, NULL, 0,
1598: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1599: sysctl_createv(clog, 0, NULL, NULL,
1600: CTLFLAG_PERMANENT,
1.74 atatat 1601: CTLTYPE_NODE, "ip6",
1602: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1603: NULL, 0, NULL, 0,
1604: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1605:
1.73 atatat 1606: sysctl_createv(clog, 0, NULL, NULL,
1607: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1608: CTLTYPE_INT, "forwarding",
1609: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1610: NULL, 0, &ip6_forwarding, 0,
1611: CTL_NET, PF_INET6, IPPROTO_IPV6,
1612: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1613: sysctl_createv(clog, 0, NULL, NULL,
1614: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1615: CTLTYPE_INT, "redirect",
1616: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1617: NULL, 0, &ip6_sendredirects, 0,
1618: CTL_NET, PF_INET6, IPPROTO_IPV6,
1619: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1620: sysctl_createv(clog, 0, NULL, NULL,
1621: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1622: CTLTYPE_INT, "hlim",
1623: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1624: NULL, 0, &ip6_defhlim, 0,
1625: CTL_NET, PF_INET6, IPPROTO_IPV6,
1626: IPV6CTL_DEFHLIM, CTL_EOL);
1627: #ifdef notyet
1.73 atatat 1628: sysctl_createv(clog, 0, NULL, NULL,
1629: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1630: CTLTYPE_INT, "mtu", NULL,
1631: NULL, 0, &, 0,
1632: CTL_NET, PF_INET6, IPPROTO_IPV6,
1633: IPV6CTL_DEFMTU, CTL_EOL);
1634: #endif
1635: #ifdef __no_idea__
1.73 atatat 1636: sysctl_createv(clog, 0, NULL, NULL,
1637: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1638: CTLTYPE_INT, "forwsrcrt", NULL,
1639: NULL, 0, &?, 0,
1640: CTL_NET, PF_INET6, IPPROTO_IPV6,
1641: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1642: sysctl_createv(clog, 0, NULL, NULL,
1643: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1644: CTLTYPE_STRUCT, "mrtstats", NULL,
1645: NULL, 0, &?, sizeof(?),
1646: CTL_NET, PF_INET6, IPPROTO_IPV6,
1647: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1648: sysctl_createv(clog, 0, NULL, NULL,
1649: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1650: CTLTYPE_?, "mrtproto", NULL,
1651: NULL, 0, &?, sizeof(?),
1652: CTL_NET, PF_INET6, IPPROTO_IPV6,
1653: IPV6CTL_MRTPROTO, CTL_EOL);
1654: #endif
1.73 atatat 1655: sysctl_createv(clog, 0, NULL, NULL,
1656: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1657: CTLTYPE_INT, "maxfragpackets",
1658: SYSCTL_DESCR("Maximum number of fragments to buffer "
1659: "for reassembly"),
1.70 atatat 1660: NULL, 0, &ip6_maxfragpackets, 0,
1661: CTL_NET, PF_INET6, IPPROTO_IPV6,
1662: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1663: #ifdef __no_idea__
1.73 atatat 1664: sysctl_createv(clog, 0, NULL, NULL,
1665: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1666: CTLTYPE_INT, "sourcecheck", NULL,
1667: NULL, 0, &?, 0,
1668: CTL_NET, PF_INET6, IPPROTO_IPV6,
1669: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1670: sysctl_createv(clog, 0, NULL, NULL,
1671: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1672: CTLTYPE_INT, "sourcecheck_logint", NULL,
1673: NULL, 0, &?, 0,
1674: CTL_NET, PF_INET6, IPPROTO_IPV6,
1675: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1676: #endif
1.73 atatat 1677: sysctl_createv(clog, 0, NULL, NULL,
1678: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1679: CTLTYPE_INT, "accept_rtadv",
1680: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1681: NULL, 0, &ip6_accept_rtadv, 0,
1682: CTL_NET, PF_INET6, IPPROTO_IPV6,
1683: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1684: sysctl_createv(clog, 0, NULL, NULL,
1685: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1686: CTLTYPE_INT, "rtadv_maxroutes",
1687: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1688: NULL, 0, &ip6_rtadv_maxroutes, 0,
1689: CTL_NET, PF_INET6, IPPROTO_IPV6,
1690: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1691: sysctl_createv(clog, 0, NULL, NULL,
1692: CTLFLAG_PERMANENT,
1693: CTLTYPE_INT, "rtadv_numroutes",
1694: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1695: NULL, 0, &nd6_numroutes, 0,
1696: CTL_NET, PF_INET6, IPPROTO_IPV6,
1697: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1698: sysctl_createv(clog, 0, NULL, NULL,
1699: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1700: CTLTYPE_INT, "keepfaith",
1701: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1702: NULL, 0, &ip6_keepfaith, 0,
1703: CTL_NET, PF_INET6, IPPROTO_IPV6,
1704: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1705: sysctl_createv(clog, 0, NULL, NULL,
1706: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1707: CTLTYPE_INT, "log_interval",
1708: SYSCTL_DESCR("Minumum interval between logging "
1709: "unroutable packets"),
1.70 atatat 1710: NULL, 0, &ip6_log_interval, 0,
1711: CTL_NET, PF_INET6, IPPROTO_IPV6,
1712: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1713: sysctl_createv(clog, 0, NULL, NULL,
1714: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1715: CTLTYPE_INT, "hdrnestlimit",
1716: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1717: NULL, 0, &ip6_hdrnestlimit, 0,
1718: CTL_NET, PF_INET6, IPPROTO_IPV6,
1719: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1720: sysctl_createv(clog, 0, NULL, NULL,
1721: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1722: CTLTYPE_INT, "dad_count",
1723: SYSCTL_DESCR("Number of Duplicate Address Detection "
1724: "probes to send"),
1.70 atatat 1725: NULL, 0, &ip6_dad_count, 0,
1726: CTL_NET, PF_INET6, IPPROTO_IPV6,
1727: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1728: sysctl_createv(clog, 0, NULL, NULL,
1729: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1730: CTLTYPE_INT, "auto_flowlabel",
1731: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1732: NULL, 0, &ip6_auto_flowlabel, 0,
1733: CTL_NET, PF_INET6, IPPROTO_IPV6,
1734: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1735: sysctl_createv(clog, 0, NULL, NULL,
1736: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1737: CTLTYPE_INT, "defmcasthlim",
1738: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1739: NULL, 0, &ip6_defmcasthlim, 0,
1740: CTL_NET, PF_INET6, IPPROTO_IPV6,
1741: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.73 atatat 1742: sysctl_createv(clog, 0, NULL, NULL,
1743: CTLFLAG_PERMANENT,
1.74 atatat 1744: CTLTYPE_STRING, "kame_version",
1745: SYSCTL_DESCR("KAME Version"),
1.78 christos 1746: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1747: CTL_NET, PF_INET6, IPPROTO_IPV6,
1748: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1749: sysctl_createv(clog, 0, NULL, NULL,
1750: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1751: CTLTYPE_INT, "use_deprecated",
1752: SYSCTL_DESCR("Allow use of deprecated addresses as "
1753: "source addresses"),
1.70 atatat 1754: NULL, 0, &ip6_use_deprecated, 0,
1755: CTL_NET, PF_INET6, IPPROTO_IPV6,
1756: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1757: sysctl_createv(clog, 0, NULL, NULL,
1758: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1759: CTLTYPE_INT, "rr_prune", NULL,
1760: NULL, 0, &ip6_rr_prune, 0,
1761: CTL_NET, PF_INET6, IPPROTO_IPV6,
1762: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1763: sysctl_createv(clog, 0, NULL, NULL,
1764: CTLFLAG_PERMANENT
1.70 atatat 1765: #ifndef INET6_BINDV6ONLY
1.73 atatat 1766: |CTLFLAG_READWRITE,
1.70 atatat 1767: #endif
1.74 atatat 1768: CTLTYPE_INT, "v6only",
1769: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1770: "to PF_INET sockets"),
1.70 atatat 1771: NULL, 0, &ip6_v6only, 0,
1772: CTL_NET, PF_INET6, IPPROTO_IPV6,
1773: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1774: sysctl_createv(clog, 0, NULL, NULL,
1775: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1776: CTLTYPE_INT, "anonportmin",
1777: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1778: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1779: CTL_NET, PF_INET6, IPPROTO_IPV6,
1780: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1781: sysctl_createv(clog, 0, NULL, NULL,
1782: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1783: CTLTYPE_INT, "anonportmax",
1784: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1785: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1786: CTL_NET, PF_INET6, IPPROTO_IPV6,
1787: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1788: #ifndef IPNOPRIVPORTS
1.73 atatat 1789: sysctl_createv(clog, 0, NULL, NULL,
1790: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1791: CTLTYPE_INT, "lowportmin",
1792: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1793: "to assign"),
1.70 atatat 1794: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1795: CTL_NET, PF_INET6, IPPROTO_IPV6,
1796: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1797: sysctl_createv(clog, 0, NULL, NULL,
1798: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1799: CTLTYPE_INT, "lowportmax",
1800: SYSCTL_DESCR("Highest privileged ephemeral port number "
1801: "to assign"),
1.70 atatat 1802: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1803: CTL_NET, PF_INET6, IPPROTO_IPV6,
1804: IPV6CTL_LOWPORTMAX, CTL_EOL);
1805: #endif /* IPNOPRIVPORTS */
1.73 atatat 1806: sysctl_createv(clog, 0, NULL, NULL,
1807: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.153 christos 1808: CTLTYPE_INT, "auto_linklocal",
1809: SYSCTL_DESCR("Default value of per-interface flag for "
1810: "adding an IPv6 link-local address to "
1811: "interfaces when attached"),
1812: NULL, 0, &ip6_auto_linklocal, 0,
1813: CTL_NET, PF_INET6, IPPROTO_IPV6,
1814: IPV6CTL_AUTO_LINKLOCAL, CTL_EOL);
1815: sysctl_createv(clog, 0, NULL, NULL,
1816: CTLFLAG_PERMANENT|CTLFLAG_READONLY,
1817: CTLTYPE_STRUCT, "addctlpolicy",
1818: SYSCTL_DESCR("Return the current address control"
1819: " policy"),
1820: sysctl_net_inet6_addrctlpolicy, 0, NULL, 0,
1821: CTL_NET, PF_INET6, IPPROTO_IPV6,
1822: IPV6CTL_ADDRCTLPOLICY, CTL_EOL);
1823: sysctl_createv(clog, 0, NULL, NULL,
1824: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1825: CTLTYPE_INT, "use_tempaddr",
1826: SYSCTL_DESCR("Use temporary address"),
1827: NULL, 0, &ip6_use_tempaddr, 0,
1828: CTL_NET, PF_INET6, IPPROTO_IPV6,
1829: CTL_CREATE, CTL_EOL);
1830: sysctl_createv(clog, 0, NULL, NULL,
1831: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.150 roy 1832: CTLTYPE_INT, "prefer_tempaddr",
1833: SYSCTL_DESCR("Prefer temporary address as source "
1834: "address"),
1835: NULL, 0, &ip6_prefer_tempaddr, 0,
1836: CTL_NET, PF_INET6, IPPROTO_IPV6,
1837: CTL_CREATE, CTL_EOL);
1838: sysctl_createv(clog, 0, NULL, NULL,
1839: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1840: CTLTYPE_INT, "temppltime",
1841: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1842: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1843: CTL_NET, PF_INET6, IPPROTO_IPV6,
1844: CTL_CREATE, CTL_EOL);
1845: sysctl_createv(clog, 0, NULL, NULL,
1846: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1847: CTLTYPE_INT, "tempvltime",
1848: SYSCTL_DESCR("valid lifetime of a temporary address"),
1849: NULL, 0, &ip6_temp_valid_lifetime, 0,
1850: CTL_NET, PF_INET6, IPPROTO_IPV6,
1851: CTL_CREATE, CTL_EOL);
1852: sysctl_createv(clog, 0, NULL, NULL,
1853: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1854: CTLTYPE_INT, "maxfrags",
1855: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1856: NULL, 0, &ip6_maxfrags, 0,
1857: CTL_NET, PF_INET6, IPPROTO_IPV6,
1858: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1859: sysctl_createv(clog, 0, NULL, NULL,
1860: CTLFLAG_PERMANENT,
1861: CTLTYPE_STRUCT, "stats",
1862: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1863: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1864: CTL_NET, PF_INET6, IPPROTO_IPV6,
1865: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1866: sysctl_createv(clog, 0, NULL, NULL,
1867: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1868: CTLTYPE_INT, "use_defaultzone",
1869: SYSCTL_DESCR("Whether to use the default scope zones"),
1870: NULL, 0, &ip6_use_defzone, 0,
1871: CTL_NET, PF_INET6, IPPROTO_IPV6,
1872: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1873: sysctl_createv(clog, 0, NULL, NULL,
1874: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1875: CTLTYPE_INT, "mcast_pmtu",
1876: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1877: NULL, 0, &ip6_mcast_pmtu, 0,
1878: CTL_NET, PF_INET6, IPPROTO_IPV6,
1879: CTL_CREATE, CTL_EOL);
1.138 christos 1880: /* anonportalgo RFC6056 subtree */
1.140 christos 1881: const struct sysctlnode *portalgo_node;
1882: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1883: CTLFLAG_PERMANENT,
1884: CTLTYPE_NODE, "anonportalgo",
1885: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1886: NULL, 0, NULL, 0,
1887: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1888: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1889: CTLFLAG_PERMANENT,
1890: CTLTYPE_STRING, "available",
1891: SYSCTL_DESCR("available algorithms"),
1.140 christos 1892: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1893: CTL_CREATE, CTL_EOL);
1.140 christos 1894: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1895: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1896: CTLTYPE_STRING, "selected",
1897: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1898: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1899: CTL_CREATE, CTL_EOL);
1.141 christos 1900: sysctl_createv(clog, 0, &portalgo_node, NULL,
1901: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1902: CTLTYPE_STRUCT, "reserve",
1903: SYSCTL_DESCR("bitmap of reserved ports"),
1904: sysctl_portalgo_reserve6, 0, NULL, 0,
1905: CTL_CREATE, CTL_EOL);
1.139 christos 1906: sysctl_createv(clog, 0, NULL, NULL,
1907: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1908: CTLTYPE_INT, "neighborgcthresh",
1909: SYSCTL_DESCR("Maximum number of entries in neighbor"
1910: " cache"),
1911: NULL, 1, &ip6_neighborgcthresh, 0,
1912: CTL_NET, PF_INET6, IPPROTO_IPV6,
1913: CTL_CREATE, CTL_EOL);
1914: sysctl_createv(clog, 0, NULL, NULL,
1915: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1916: CTLTYPE_INT, "maxifprefixes",
1917: SYSCTL_DESCR("Maximum number of prefixes created by"
1918: " route advertisement per interface"),
1919: NULL, 1, &ip6_maxifprefixes, 0,
1920: CTL_NET, PF_INET6, IPPROTO_IPV6,
1921: CTL_CREATE, CTL_EOL);
1922: sysctl_createv(clog, 0, NULL, NULL,
1923: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1924: CTLTYPE_INT, "maxifdefrouters",
1925: SYSCTL_DESCR("Maximum number of default routers created"
1926: " by route advertisement per interface"),
1927: NULL, 1, &ip6_maxifdefrouters, 0,
1928: CTL_NET, PF_INET6, IPPROTO_IPV6,
1929: CTL_CREATE, CTL_EOL);
1930: sysctl_createv(clog, 0, NULL, NULL,
1931: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1932: CTLTYPE_INT, "maxdynroutes",
1933: SYSCTL_DESCR("Maximum number of routes created via"
1934: " redirect"),
1935: NULL, 1, &ip6_maxdynroutes, 0,
1936: CTL_NET, PF_INET6, IPPROTO_IPV6,
1937: CTL_CREATE, CTL_EOL);
1.2 itojun 1938: }
1.116 thorpej 1939:
1940: void
1941: ip6_statinc(u_int stat)
1942: {
1943:
1944: KASSERT(stat < IP6_NSTATS);
1945: IP6_STATINC(stat);
1946: }
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