Annotation of src/sys/netinet6/ip6_input.c, Revision 1.149.4.8
1.149.4.8! skrll 1: /* $NetBSD: ip6_input.c,v 1.149.4.7 2016/07/09 20:25:22 skrll 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>
1.149.4.8! skrll 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.149.4.7 2016/07/09 20:25:22 skrll Exp $");
1.2 itojun 66:
1.149.4.2 skrll 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"
1.149.4.2 skrll 73: #endif
1.2 itojun 74:
75: #include <sys/param.h>
76: #include <sys/systm.h>
77: #include <sys/malloc.h>
78: #include <sys/mbuf.h>
79: #include <sys/domain.h>
80: #include <sys/protosw.h>
81: #include <sys/socket.h>
82: #include <sys/socketvar.h>
83: #include <sys/errno.h>
84: #include <sys/time.h>
85: #include <sys/kernel.h>
86: #include <sys/syslog.h>
87: #include <sys/proc.h>
1.46 simonb 88: #include <sys/sysctl.h>
1.133 tls 89: #include <sys/cprng.h>
1.149.4.8! skrll 90: #include <sys/percpu.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:
1.149.4.8! skrll 147: percpu_t *ip6_forward_rt_percpu __cacheline_aligned;
! 148:
1.149.4.5 skrll 149: static void ip6_init2(void);
1.148 rmind 150: static void ip6intr(void *);
1.112 dyoung 151: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 152:
1.136 drochner 153: static int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
154: u_int32_t *);
1.111 dyoung 155: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.128 pooka 156: static void sysctl_net_inet6_ip6_setup(struct sysctllog **);
1.2 itojun 157:
158: /*
159: * IP6 initialization: fill in IP6 protocol switch table.
160: * All protocols not implemented in kernel go to raw IP6 protocol handler.
161: */
162: void
1.114 matt 163: ip6_init(void)
1.2 itojun 164: {
1.78 christos 165: const struct ip6protosw *pr;
1.35 itojun 166: int i;
1.2 itojun 167:
1.149.4.7 skrll 168: in6_init();
169:
1.128 pooka 170: sysctl_net_inet6_ip6_setup(NULL);
1.78 christos 171: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 172: if (pr == 0)
173: panic("ip6_init");
174: for (i = 0; i < IPPROTO_MAX; i++)
175: ip6_protox[i] = pr - inet6sw;
1.78 christos 176: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
177: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 178: if (pr->pr_domain->dom_family == PF_INET6 &&
179: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
180: ip6_protox[pr->pr_protocol] = pr - inet6sw;
1.148 rmind 181:
1.149 ozaki-r 182: ip6_pktq = pktq_create(IFQ_MAXLEN, ip6intr, NULL);
1.148 rmind 183: KASSERT(ip6_pktq != NULL);
184:
1.81 rpaulo 185: scope6_init();
186: addrsel_policy_init();
1.2 itojun 187: nd6_init();
188: frag6_init();
1.133 tls 189: ip6_desync_factor = cprng_fast32() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 190:
1.149.4.5 skrll 191: ip6_init2();
1.98 liamjfoy 192: #ifdef GATEWAY
1.99 liamjfoy 193: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 194: #endif
1.29 thorpej 195: /* Register our Packet Filter hook. */
1.143 rmind 196: inet6_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET6);
197: KASSERT(inet6_pfil_hook != NULL);
1.116 thorpej 198:
199: ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS);
1.149.4.8! skrll 200:
! 201: ip6_forward_rt_percpu = percpu_alloc(sizeof(struct route));
! 202: if (ip6_forward_rt_percpu == NULL)
! 203: panic("failed to alllocate ip6_forward_rt_percpu");
1.2 itojun 204: }
205:
206: static void
1.149.4.5 skrll 207: ip6_init2(void)
1.2 itojun 208: {
209:
1.83 rpaulo 210: /* timer for regeneranation of temporary addresses randomize ID */
1.118 ad 211: callout_init(&in6_tmpaddrtimer_ch, CALLOUT_MPSAFE);
1.83 rpaulo 212: callout_reset(&in6_tmpaddrtimer_ch,
213: (ip6_temp_preferred_lifetime - ip6_desync_factor -
214: ip6_temp_regen_advance) * hz,
215: in6_tmpaddrtimer, NULL);
1.2 itojun 216: }
217:
218: /*
219: * IP6 input interrupt handling. Just pass the packet to ip6_input.
220: */
1.148 rmind 221: static void
222: ip6intr(void *arg __unused)
1.2 itojun 223: {
224: struct mbuf *m;
225:
1.118 ad 226: mutex_enter(softnet_lock);
1.148 rmind 227: while ((m = pktq_dequeue(ip6_pktq)) != NULL) {
1.149.4.7 skrll 228: struct psref psref;
229: struct ifnet *rcvif = m_get_rcvif_psref(m, &psref);
1.148 rmind 230:
1.149.4.7 skrll 231: if (rcvif == NULL) {
232: m_freem(m);
233: continue;
234: }
1.148 rmind 235: /*
236: * Drop the packet if IPv6 is disabled on the interface.
237: */
1.149.4.7 skrll 238: if ((ND_IFINFO(rcvif)->flags & ND6_IFF_IFDISABLED)) {
239: m_put_rcvif_psref(rcvif, &psref);
1.83 rpaulo 240: m_freem(m);
1.148 rmind 241: continue;
1.83 rpaulo 242: }
1.149.4.7 skrll 243: ip6_input(m, rcvif);
244: m_put_rcvif_psref(rcvif, &psref);
1.2 itojun 245: }
1.118 ad 246: mutex_exit(softnet_lock);
1.2 itojun 247: }
248:
249: void
1.149.4.7 skrll 250: ip6_input(struct mbuf *m, struct ifnet *rcvif)
1.2 itojun 251: {
1.9 itojun 252: struct ip6_hdr *ip6;
1.105 dyoung 253: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 254: u_int32_t plen;
1.5 itojun 255: u_int32_t rtalert = ~0;
1.104 yamt 256: int nxt, ours = 0, rh_present = 0;
1.9 itojun 257: struct ifnet *deliverifp = NULL;
1.64 itojun 258: int srcrt = 0;
1.105 dyoung 259: const struct rtentry *rt;
260: union {
261: struct sockaddr dst;
262: struct sockaddr_in6 dst6;
263: } u;
1.149.4.8! skrll 264: struct route *ro;
1.2 itojun 265:
266: /*
1.81 rpaulo 267: * make sure we don't have onion peering information into m_tag.
268: */
269: ip6_delaux(m);
270:
271: /*
1.44 itojun 272: * mbuf statistics
1.2 itojun 273: */
274: if (m->m_flags & M_EXT) {
275: if (m->m_next)
1.116 thorpej 276: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 277: else
1.116 thorpej 278: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 279: } else {
1.115 thorpej 280: #define M2MMAX 32
1.2 itojun 281: if (m->m_next) {
1.149.4.6 skrll 282: if (m->m_flags & M_LOOP)
1.116 thorpej 283: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.149.4.6 skrll 284: else if (rcvif->if_index < M2MMAX)
285: IP6_STATINC(IP6_STAT_M2M + rcvif->if_index);
286: else
1.116 thorpej 287: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 288: } else
1.116 thorpej 289: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 290: #undef M2MMAX
1.2 itojun 291: }
292:
1.149.4.6 skrll 293: in6_ifstat_inc(rcvif, ifs6_in_receive);
1.116 thorpej 294: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 295:
1.57 thorpej 296: /*
297: * If the IPv6 header is not aligned, slurp it up into a new
298: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 299: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 300: * IPv6 header is in the first mbuf of the chain.
301: */
1.97 christos 302: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 303: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
304: (max_linkhdr + 3) & ~3)) == NULL) {
305: /* XXXJRT new stat, please */
1.116 thorpej 306: IP6_STATINC(IP6_STAT_TOOSMALL);
1.149.4.6 skrll 307: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.57 thorpej 308: return;
309: }
310: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
1.55 itojun 311: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 312: IP6_STATINC(IP6_STAT_TOOSMALL);
1.149.4.6 skrll 313: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.9 itojun 314: return;
315: }
1.2 itojun 316: }
317:
318: ip6 = mtod(m, struct ip6_hdr *);
319:
320: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 321: IP6_STATINC(IP6_STAT_BADVERS);
1.149.4.6 skrll 322: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 323: goto bad;
324: }
1.15 darrenr 325:
1.98 liamjfoy 326: /*
327: * Assume that we can create a fast-forward IP flow entry
328: * based on this packet.
329: */
330: m->m_flags |= M_CANFASTFWD;
331:
1.15 darrenr 332: /*
333: * Run through list of hooks for input packets. If there are any
334: * filters which require that additional packets in the flow are
335: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
336: * Note that filters must _never_ set this flag, as another filter
337: * in the list may have previously cleared it.
338: */
1.39 itojun 339: /*
340: * let ipfilter look at packet on the wire,
341: * not the decapsulated packet.
342: */
1.142 christos 343: #if defined(IPSEC)
1.146 christos 344: if (!ipsec_used || !ipsec_indone(m))
1.39 itojun 345: #else
346: if (1)
347: #endif
348: {
1.64 itojun 349: struct in6_addr odst;
350:
351: odst = ip6->ip6_dst;
1.149.4.6 skrll 352: if (pfil_run_hooks(inet6_pfil_hook, &m, rcvif, PFIL_IN) != 0)
1.39 itojun 353: return;
354: if (m == NULL)
355: return;
356: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 357: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 358: }
1.15 darrenr 359:
1.116 thorpej 360: IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt);
1.2 itojun 361:
1.30 thorpej 362: #ifdef ALTQ
363: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
364: /* packet is dropped by traffic conditioner */
365: return;
1.9 itojun 366: }
367: #endif
368:
1.2 itojun 369: /*
1.44 itojun 370: * Check against address spoofing/corruption.
1.2 itojun 371: */
372: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
373: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 374: /*
375: * XXX: "badscope" is not very suitable for a multicast source.
376: */
1.116 thorpej 377: IP6_STATINC(IP6_STAT_BADSCOPE);
1.149.4.6 skrll 378: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.2 itojun 379: goto bad;
380: }
1.13 itojun 381: /*
1.44 itojun 382: * The following check is not documented in specs. A malicious
383: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
384: * and bypass security checks (act as if it was from 127.0.0.1 by using
385: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 386: *
1.44 itojun 387: * This check chokes if we are in an SIIT cloud. As none of BSDs
388: * support IPv4-less kernel compilation, we cannot support SIIT
389: * environment at all. So, it makes more sense for us to reject any
390: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 391: * partial support for SIIT environment.
1.13 itojun 392: */
393: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
394: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 395: IP6_STATINC(IP6_STAT_BADSCOPE);
1.149.4.6 skrll 396: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 397: goto bad;
398: }
1.17 itojun 399: #if 0
1.13 itojun 400: /*
1.17 itojun 401: * Reject packets with IPv4 compatible addresses (auto tunnel).
402: *
403: * The code forbids auto tunnel relay case in RFC1933 (the check is
404: * stronger than RFC1933). We may want to re-enable it if mech-xx
405: * is revised to forbid relaying case.
1.13 itojun 406: */
407: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
408: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
1.116 thorpej 409: IP6_STATINC(IP6_STAT_BADSCOPE);
1.149.4.6 skrll 410: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 411: goto bad;
412: }
413: #endif
1.35 itojun 414:
1.2 itojun 415: /*
1.82 yamt 416: * Disambiguate address scope zones (if there is ambiguity).
417: * We first make sure that the original source or destination address
418: * is not in our internal form for scoped addresses. Such addresses
419: * are not necessarily invalid spec-wise, but we cannot accept them due
420: * to the usage conflict.
421: * in6_setscope() then also checks and rejects the cases where src or
422: * dst are the loopback address and the receiving interface
1.149.4.2 skrll 423: * is not loopback.
1.82 yamt 424: */
1.88 bouyer 425: if (__predict_false(
426: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
427: goto bad;
428: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 429: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 430: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 431: goto bad;
432: }
1.149.4.6 skrll 433: if (in6_setscope(&ip6->ip6_src, rcvif, NULL) ||
434: in6_setscope(&ip6->ip6_dst, rcvif, NULL)) {
1.116 thorpej 435: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 436: goto bad;
437: }
438:
439: /*
1.2 itojun 440: * Multicast check
441: */
442: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
443: struct in6_multi *in6m = 0;
1.9 itojun 444:
1.149.4.6 skrll 445: in6_ifstat_inc(rcvif, ifs6_in_mcast);
1.2 itojun 446: /*
447: * See if we belong to the destination multicast group on the
448: * arrival interface.
449: */
1.149.4.6 skrll 450: IN6_LOOKUP_MULTI(ip6->ip6_dst, rcvif, in6m);
1.2 itojun 451: if (in6m)
452: ours = 1;
453: else if (!ip6_mrouter) {
1.116 thorpej 454: uint64_t *ip6s = IP6_STAT_GETREF();
455: ip6s[IP6_STAT_NOTMEMBER]++;
456: ip6s[IP6_STAT_CANTFORWARD]++;
457: IP6_STAT_PUTREF();
1.149.4.6 skrll 458: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.2 itojun 459: goto bad;
460: }
1.149.4.6 skrll 461: deliverifp = rcvif;
1.2 itojun 462: goto hbhcheck;
463: }
464:
1.105 dyoung 465: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
466:
1.2 itojun 467: /*
468: * Unicast check
469: */
1.149.4.8! skrll 470: ro = percpu_getref(ip6_forward_rt_percpu);
! 471: rt = rtcache_lookup2(ro, &u.dst, 1, &hit);
! 472: percpu_putref(ip6_forward_rt_percpu);
1.105 dyoung 473: if (hit)
1.116 thorpej 474: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 475: else
1.116 thorpej 476: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 477:
1.109 dyoung 478: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 479:
480: /*
481: * Accept the packet if the forwarding interface to the destination
482: * according to the routing table is the loopback interface,
483: * unless the associated route has a gateway.
484: * Note that this approach causes to accept a packet if there is a
485: * route to the loopback interface for the destination of the packet.
486: * But we think it's even useful in some situations, e.g. when using
487: * a special daemon which wants to intercept the packet.
488: */
1.105 dyoung 489: if (rt != NULL &&
490: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.2 itojun 491: #if 0
492: /*
493: * The check below is redundant since the comparison of
494: * the destination and the key of the rtentry has
495: * already done through looking up the routing table.
496: */
1.109 dyoung 497: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 498: #endif
1.105 dyoung 499: rt->rt_ifp->if_type == IFT_LOOP) {
500: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 501: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
502: m->m_flags |= M_ANYCAST6;
1.24 itojun 503: /*
504: * packets to a tentative, duplicated, or somehow invalid
505: * address must not be accepted.
506: */
1.149.4.8! skrll 507: if (!(ia6->ia6_flags & (IN6_IFF_NOTREADY | IN6_IFF_DETACHED))) {
1.24 itojun 508: /* this address is ready */
1.2 itojun 509: ours = 1;
1.9 itojun 510: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 511: goto hbhcheck;
512: } else {
1.24 itojun 513: /* address is not ready, so discard the packet. */
1.149.4.5 skrll 514: nd6log(LOG_INFO, "packet to an unready address %s->%s\n",
1.24 itojun 515: ip6_sprintf(&ip6->ip6_src),
1.149.4.5 skrll 516: ip6_sprintf(&ip6->ip6_dst));
1.24 itojun 517:
518: goto bad;
1.2 itojun 519: }
520: }
521:
522: /*
1.55 itojun 523: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 524: */
525: #if defined(NFAITH) && 0 < NFAITH
526: if (ip6_keepfaith) {
1.105 dyoung 527: if (rt != NULL && rt->rt_ifp != NULL &&
528: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 529: /* XXX do we need more sanity checks? */
530: ours = 1;
1.105 dyoung 531: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 532: goto hbhcheck;
533: }
534: }
535: #endif
536:
537: #if 0
538: {
539: /*
540: * Last resort: check in6_ifaddr for incoming interface.
541: * The code is here until I update the "goto ours hack" code above
542: * working right.
543: */
544: struct ifaddr *ifa;
1.149.4.7 skrll 545: IFADDR_READER_FOREACH(ifa, rcvif) {
1.9 itojun 546: if (ifa->ifa_addr->sa_family != AF_INET6)
547: continue;
548: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
549: ours = 1;
550: deliverifp = ifa->ifa_ifp;
1.2 itojun 551: goto hbhcheck;
552: }
553: }
1.9 itojun 554: }
1.2 itojun 555: #endif
556:
557: /*
558: * Now there is no reason to process the packet if it's not our own
559: * and we're not a router.
560: */
561: if (!ip6_forwarding) {
1.116 thorpej 562: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.149.4.6 skrll 563: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.2 itojun 564: goto bad;
565: }
566:
567: hbhcheck:
568: /*
1.81 rpaulo 569: * record address information into m_tag, if we don't have one yet.
570: * note that we are unable to record it, if the address is not listed
571: * as our interface address (e.g. multicast addresses, addresses
572: * within FAITH prefixes and such).
573: */
1.111 dyoung 574: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 575: struct in6_ifaddr *ia6;
1.149.4.8! skrll 576: int s = pserialize_read_enter();
1.81 rpaulo 577:
578: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.149.4.8! skrll 579: /* Depends on ip6_setdstifaddr never sleep */
1.111 dyoung 580: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
581: /*
582: * XXX maybe we should drop the packet here,
583: * as we could not provide enough information
584: * to the upper layers.
585: */
1.81 rpaulo 586: }
1.149.4.8! skrll 587: pserialize_read_exit(s);
1.81 rpaulo 588: }
589:
590: /*
1.2 itojun 591: * Process Hop-by-Hop options header if it's contained.
592: * m may be modified in ip6_hopopts_input().
593: * If a JumboPayload option is included, plen will also be modified.
594: */
595: plen = (u_int32_t)ntohs(ip6->ip6_plen);
596: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 597: struct ip6_hbh *hbh;
598:
599: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
600: #if 0 /*touches NULL pointer*/
1.149.4.6 skrll 601: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.9 itojun 602: #endif
1.2 itojun 603: return; /* m have already been freed */
1.9 itojun 604: }
1.22 itojun 605:
1.2 itojun 606: /* adjust pointer */
607: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 608:
609: /*
1.49 itojun 610: * if the payload length field is 0 and the next header field
1.22 itojun 611: * indicates Hop-by-Hop Options header, then a Jumbo Payload
612: * option MUST be included.
613: */
614: if (ip6->ip6_plen == 0 && plen == 0) {
615: /*
616: * Note that if a valid jumbo payload option is
1.83 rpaulo 617: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 618: * (non-zero) payload length to the variable plen.
1.22 itojun 619: */
1.116 thorpej 620: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.149.4.6 skrll 621: in6_ifstat_inc(rcvif, ifs6_in_discard);
622: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.22 itojun 623: icmp6_error(m, ICMP6_PARAM_PROB,
624: ICMP6_PARAMPROB_HEADER,
1.97 christos 625: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 626: return;
627: }
1.9 itojun 628: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
629: sizeof(struct ip6_hbh));
630: if (hbh == NULL) {
1.116 thorpej 631: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 632: return;
633: }
1.57 thorpej 634: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 635: nxt = hbh->ip6h_nxt;
1.2 itojun 636:
637: /*
638: * accept the packet if a router alert option is included
639: * and we act as an IPv6 router.
640: */
1.5 itojun 641: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 642: ours = 1;
643: } else
644: nxt = ip6->ip6_nxt;
645:
646: /*
647: * Check that the amount of data in the buffers
648: * is as at least much as the IPv6 header would have us expect.
649: * Trim mbufs if longer than we expect.
650: * Drop packet if shorter than we expect.
651: */
652: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 653: IP6_STATINC(IP6_STAT_TOOSHORT);
1.149.4.6 skrll 654: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.2 itojun 655: goto bad;
656: }
657: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
658: if (m->m_len == m->m_pkthdr.len) {
659: m->m_len = sizeof(struct ip6_hdr) + plen;
660: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
661: } else
662: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
663: }
664:
665: /*
666: * Forward if desirable.
667: */
668: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
669: /*
670: * If we are acting as a multicast router, all
671: * incoming multicast packets are passed to the
672: * kernel-level multicast forwarding function.
673: * The packet is returned (relatively) intact; if
674: * ip6_mforward() returns a non-zero value, the packet
675: * must be discarded, else it may be accepted below.
676: */
1.149.4.6 skrll 677: if (ip6_mrouter && ip6_mforward(ip6, rcvif, m)) {
1.116 thorpej 678: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.2 itojun 679: m_freem(m);
680: return;
681: }
682: if (!ours) {
683: m_freem(m);
684: return;
685: }
1.22 itojun 686: } else if (!ours) {
1.64 itojun 687: ip6_forward(m, srcrt);
1.2 itojun 688: return;
1.56 itojun 689: }
1.25 itojun 690:
691: ip6 = mtod(m, struct ip6_hdr *);
692:
693: /*
694: * Malicious party may be able to use IPv4 mapped addr to confuse
695: * tcp/udp stack and bypass security checks (act as if it was from
696: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
697: *
698: * For SIIT end node behavior, you may want to disable the check.
699: * However, you will become vulnerable to attacks using IPv4 mapped
700: * source.
701: */
702: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
703: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 704: IP6_STATINC(IP6_STAT_BADSCOPE);
1.149.4.6 skrll 705: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.25 itojun 706: goto bad;
707: }
1.2 itojun 708:
709: /*
710: * Tell launch routine the next header
711: */
1.12 itojun 712: #ifdef IFA_STATS
1.28 itojun 713: if (deliverifp != NULL) {
1.9 itojun 714: struct in6_ifaddr *ia6;
1.149.4.8! skrll 715: int s = pserialize_read_enter();
1.9 itojun 716: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
717: if (ia6)
718: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
1.149.4.8! skrll 719: pserialize_read_exit(s);
1.9 itojun 720: }
721: #endif
1.116 thorpej 722: IP6_STATINC(IP6_STAT_DELIVERED);
1.9 itojun 723: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 724: nest = 0;
1.40 itojun 725:
1.104 yamt 726: rh_present = 0;
1.2 itojun 727: while (nxt != IPPROTO_DONE) {
728: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.116 thorpej 729: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.149.4.6 skrll 730: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 731: goto bad;
732: }
1.8 itojun 733:
734: /*
735: * protection against faulty packet - there should be
736: * more sanity checks in header chain processing.
737: */
738: if (m->m_pkthdr.len < off) {
1.116 thorpej 739: IP6_STATINC(IP6_STAT_TOOSHORT);
1.149.4.6 skrll 740: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.8 itojun 741: goto bad;
742: }
743:
1.104 yamt 744: if (nxt == IPPROTO_ROUTING) {
745: if (rh_present++) {
1.149.4.6 skrll 746: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.116 thorpej 747: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 748: goto bad;
749: }
750: }
751:
1.142 christos 752: #ifdef IPSEC
1.146 christos 753: if (ipsec_used) {
1.94 degroote 754: /*
1.146 christos 755: * enforce IPsec policy checking if we are seeing last
756: * header. note that we do not visit this with
757: * protocols with pcb layer code - like udp/tcp/raw ip.
1.94 degroote 758: */
1.146 christos 759: if ((inet6sw[ip_protox[nxt]].pr_flags
760: & PR_LASTHDR) != 0) {
1.149.4.1 skrll 761: int error = ipsec6_input(m);
1.146 christos 762: if (error)
763: goto bad;
764: }
1.94 degroote 765: }
1.142 christos 766: #endif /* IPSEC */
1.94 degroote 767:
1.2 itojun 768: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
769: }
770: return;
771: bad:
772: m_freem(m);
773: }
774:
775: /*
1.81 rpaulo 776: * set/grab in6_ifaddr correspond to IPv6 destination address.
777: */
778: static struct m_tag *
1.112 dyoung 779: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 780: {
781: struct m_tag *mtag;
1.144 christos 782: struct ip6aux *ip6a;
1.81 rpaulo 783:
784: mtag = ip6_addaux(m);
1.144 christos 785: if (mtag == NULL)
786: return NULL;
1.112 dyoung 787:
1.144 christos 788: ip6a = (struct ip6aux *)(mtag + 1);
789: if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) {
790: IP6_STATINC(IP6_STAT_BADSCOPE);
791: return NULL;
1.112 dyoung 792: }
1.144 christos 793:
794: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
795: ip6a->ip6a_flags = ia->ia6_flags;
796: return mtag;
1.81 rpaulo 797: }
798:
1.112 dyoung 799: const struct ip6aux *
1.107 christos 800: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 801: {
802: struct m_tag *mtag;
803:
804: mtag = ip6_findaux(m);
1.112 dyoung 805: if (mtag != NULL)
806: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 807: else
808: return NULL;
809: }
810:
811: /*
1.2 itojun 812: * Hop-by-Hop options header processing. If a valid jumbo payload option is
813: * included, the real payload length will be stored in plenp.
1.107 christos 814: *
815: * rtalertp - XXX: should be stored more smart way
1.2 itojun 816: */
1.136 drochner 817: int
1.149.4.2 skrll 818: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
1.107 christos 819: struct mbuf **mp, int *offp)
1.2 itojun 820: {
1.35 itojun 821: struct mbuf *m = *mp;
1.2 itojun 822: int off = *offp, hbhlen;
823: struct ip6_hbh *hbh;
824:
825: /* validation of the length of the header */
1.9 itojun 826: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
827: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
828: if (hbh == NULL) {
1.116 thorpej 829: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 830: return -1;
831: }
832: hbhlen = (hbh->ip6h_len + 1) << 3;
833: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
834: hbhlen);
835: if (hbh == NULL) {
1.116 thorpej 836: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 837: return -1;
838: }
1.57 thorpej 839: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 840: off += hbhlen;
841: hbhlen -= sizeof(struct ip6_hbh);
842:
843: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
844: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 845: return (-1);
1.2 itojun 846:
847: *offp = off;
848: *mp = m;
1.58 itojun 849: return (0);
1.2 itojun 850: }
851:
852: /*
853: * Search header for all Hop-by-hop options and process each option.
854: * This function is separate from ip6_hopopts_input() in order to
855: * handle a case where the sending node itself process its hop-by-hop
856: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 857: *
858: * The function assumes that hbh header is located right after the IPv6 header
859: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
860: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 861: */
1.136 drochner 862: static int
1.149.4.2 skrll 863: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
1.107 christos 864: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 865: {
866: struct ip6_hdr *ip6;
867: int optlen = 0;
868: u_int8_t *opt = opthead;
869: u_int16_t rtalert_val;
1.22 itojun 870: u_int32_t jumboplen;
1.55 itojun 871: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 872:
873: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 874: switch (*opt) {
875: case IP6OPT_PAD1:
876: optlen = 1;
877: break;
878: case IP6OPT_PADN:
879: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 880: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 881: goto bad;
882: }
883: optlen = *(opt + 1) + 2;
884: break;
885: case IP6OPT_RTALERT:
886: /* XXX may need check for alignment */
887: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 888: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 889: goto bad;
890: }
891: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 892: /* XXX stat */
893: icmp6_error(m, ICMP6_PARAM_PROB,
894: ICMP6_PARAMPROB_HEADER,
895: erroff + opt + 1 - opthead);
896: return (-1);
1.35 itojun 897: }
898: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 899: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 900: *rtalertp = ntohs(rtalert_val);
901: break;
902: case IP6OPT_JUMBO:
1.22 itojun 903: /* XXX may need check for alignment */
904: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 905: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 906: goto bad;
907: }
1.35 itojun 908: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 909: /* XXX stat */
910: icmp6_error(m, ICMP6_PARAM_PROB,
911: ICMP6_PARAMPROB_HEADER,
912: erroff + opt + 1 - opthead);
913: return (-1);
1.35 itojun 914: }
1.22 itojun 915: optlen = IP6OPT_JUMBO_LEN;
916:
917: /*
918: * IPv6 packets that have non 0 payload length
1.35 itojun 919: * must not contain a jumbo payload option.
1.22 itojun 920: */
921: ip6 = mtod(m, struct ip6_hdr *);
922: if (ip6->ip6_plen) {
1.116 thorpej 923: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 924: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 925: ICMP6_PARAMPROB_HEADER,
926: erroff + opt - opthead);
927: return (-1);
1.22 itojun 928: }
1.2 itojun 929:
1.22 itojun 930: /*
931: * We may see jumbolen in unaligned location, so
932: * we'd need to perform bcopy().
933: */
1.126 tsutsui 934: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 935: jumboplen = (u_int32_t)htonl(jumboplen);
936:
937: #if 1
938: /*
939: * if there are multiple jumbo payload options,
940: * *plenp will be non-zero and the packet will be
941: * rejected.
942: * the behavior may need some debate in ipngwg -
943: * multiple options does not make sense, however,
944: * there's no explicit mention in specification.
945: */
946: if (*plenp != 0) {
1.116 thorpej 947: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 948: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 949: ICMP6_PARAMPROB_HEADER,
950: erroff + opt + 2 - opthead);
951: return (-1);
1.22 itojun 952: }
1.8 itojun 953: #endif
1.2 itojun 954:
1.22 itojun 955: /*
956: * jumbo payload length must be larger than 65535.
957: */
958: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 959: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 960: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 961: ICMP6_PARAMPROB_HEADER,
962: erroff + opt + 2 - opthead);
963: return (-1);
1.22 itojun 964: }
965: *plenp = jumboplen;
966:
967: break;
1.35 itojun 968: default: /* unknown option */
969: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 970: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 971: goto bad;
972: }
1.55 itojun 973: optlen = ip6_unknown_opt(opt, m,
974: erroff + opt - opthead);
975: if (optlen == -1)
976: return (-1);
1.35 itojun 977: optlen += 2;
978: break;
1.2 itojun 979: }
980: }
981:
1.55 itojun 982: return (0);
1.2 itojun 983:
984: bad:
985: m_freem(m);
1.55 itojun 986: return (-1);
1.2 itojun 987: }
988:
989: /*
990: * Unknown option processing.
991: * The third argument `off' is the offset from the IPv6 header to the option,
992: * which is necessary if the IPv6 header the and option header and IPv6 header
993: * is not continuous in order to return an ICMPv6 error.
994: */
995: int
1.107 christos 996: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 997: {
998: struct ip6_hdr *ip6;
999:
1.35 itojun 1000: switch (IP6OPT_TYPE(*optp)) {
1001: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1002: return ((int)*(optp + 1));
1.35 itojun 1003: case IP6OPT_TYPE_DISCARD: /* silently discard */
1004: m_freem(m);
1.58 itojun 1005: return (-1);
1.35 itojun 1006: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 1007: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1008: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1009: return (-1);
1.35 itojun 1010: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 1011: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1012: ip6 = mtod(m, struct ip6_hdr *);
1013: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1014: (m->m_flags & (M_BCAST|M_MCAST)))
1015: m_freem(m);
1016: else
1017: icmp6_error(m, ICMP6_PARAM_PROB,
1018: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1019: return (-1);
1.2 itojun 1020: }
1021:
1022: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1023: return (-1);
1.2 itojun 1024: }
1025:
1026: /*
1.9 itojun 1027: * Create the "control" list for this pcb.
1028: *
1029: * The routine will be called from upper layer handlers like tcp6_input().
1030: * Thus the routine assumes that the caller (tcp6_input) have already
1031: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1032: * very first mbuf on the mbuf chain.
1033: * We may want to add some infinite loop prevention or sanity checks for safety.
1034: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1035: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1036: */
1037: void
1.149.4.2 skrll 1038: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1.107 christos 1039: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1040: {
1.85 rpaulo 1041: #ifdef RFC2292
1042: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1043: #else
1044: #define IS2292(x, y) (y)
1045: #endif
1046:
1.123 christos 1047: if (in6p->in6p_socket->so_options & SO_TIMESTAMP
1048: #ifdef SO_OTIMESTAMP
1049: || in6p->in6p_socket->so_options & SO_OTIMESTAMP
1050: #endif
1051: ) {
1.2 itojun 1052: struct timeval tv;
1053:
1054: microtime(&tv);
1.123 christos 1055: #ifdef SO_OTIMESTAMP
1056: if (in6p->in6p_socket->so_options & SO_OTIMESTAMP) {
1057: struct timeval50 tv50;
1058: timeval_to_timeval50(&tv, &tv50);
1059: *mp = sbcreatecontrol((void *) &tv50, sizeof(tv50),
1060: SCM_OTIMESTAMP, SOL_SOCKET);
1061: } else
1062: #endif
1.97 christos 1063: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1064: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1065: if (*mp)
1066: mp = &(*mp)->m_next;
1067: }
1.87 rpaulo 1068:
1069: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1070: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1071: return;
1072:
1.2 itojun 1073: /* RFC 2292 sec. 5 */
1.35 itojun 1074: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1075: struct in6_pktinfo pi6;
1.85 rpaulo 1076:
1.126 tsutsui 1077: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1078: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.149.4.7 skrll 1079: pi6.ipi6_ifindex = m->m_pkthdr.rcvif_index;
1.97 christos 1080: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1081: sizeof(struct in6_pktinfo),
1082: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1083: if (*mp)
1084: mp = &(*mp)->m_next;
1085: }
1.85 rpaulo 1086:
1.2 itojun 1087: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1088: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1089:
1.97 christos 1090: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1091: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1092: if (*mp)
1093: mp = &(*mp)->m_next;
1094: }
1095:
1096: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1097: u_int32_t flowinfo;
1098: int tclass;
1099:
1100: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1101: flowinfo >>= 20;
1102:
1103: tclass = flowinfo & 0xff;
1.97 christos 1104: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1105: IPV6_TCLASS, IPPROTO_IPV6);
1106:
1.2 itojun 1107: if (*mp)
1108: mp = &(*mp)->m_next;
1109: }
1110:
1111: /*
1.75 itojun 1112: * IPV6_HOPOPTS socket option. Recall that we required super-user
1113: * privilege for the option (see ip6_ctloutput), but it might be too
1114: * strict, since there might be some hop-by-hop options which can be
1115: * returned to normal user.
1.85 rpaulo 1116: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1117: */
1.75 itojun 1118: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1119: /*
1120: * Check if a hop-by-hop options header is contatined in the
1121: * received packet, and if so, store the options as ancillary
1122: * data. Note that a hop-by-hop options header must be
1123: * just after the IPv6 header, which fact is assured through
1124: * the IPv6 input processing.
1125: */
1.78 christos 1126: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1127: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1128: struct ip6_hbh *hbh;
1129: int hbhlen;
1.62 itojun 1130: struct mbuf *ext;
1.9 itojun 1131:
1.62 itojun 1132: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1133: xip6->ip6_nxt);
1.62 itojun 1134: if (ext == NULL) {
1.116 thorpej 1135: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1136: return;
1137: }
1.62 itojun 1138: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1139: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1140: if (hbhlen != ext->m_len) {
1141: m_freem(ext);
1.116 thorpej 1142: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1143: return;
1144: }
1.2 itojun 1145:
1146: /*
1147: * XXX: We copy whole the header even if a jumbo
1148: * payload option is included, which option is to
1149: * be removed before returning in the RFC 2292.
1.85 rpaulo 1150: * Note: this constraint is removed in RFC3542.
1.2 itojun 1151: */
1.97 christos 1152: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1153: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1154: IPPROTO_IPV6);
1.2 itojun 1155: if (*mp)
1156: mp = &(*mp)->m_next;
1.62 itojun 1157: m_freem(ext);
1.2 itojun 1158: }
1159: }
1160:
1161: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1162: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1163: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1164: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1165:
1166: /*
1167: * Search for destination options headers or routing
1168: * header(s) through the header chain, and stores each
1169: * header as ancillary data.
1170: * Note that the order of the headers remains in
1171: * the chain of ancillary data.
1172: */
1.86 rpaulo 1173: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1174: struct ip6_ext *ip6e = NULL;
1.9 itojun 1175: int elen;
1.62 itojun 1176: struct mbuf *ext = NULL;
1.9 itojun 1177:
1.62 itojun 1178: /*
1179: * if it is not an extension header, don't try to
1180: * pull it from the chain.
1181: */
1182: switch (nxt) {
1183: case IPPROTO_DSTOPTS:
1184: case IPPROTO_ROUTING:
1185: case IPPROTO_HOPOPTS:
1186: case IPPROTO_AH: /* is it possible? */
1187: break;
1188: default:
1189: goto loopend;
1190: }
1191:
1192: ext = ip6_pullexthdr(m, off, nxt);
1193: if (ext == NULL) {
1.116 thorpej 1194: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1195: return;
1196: }
1.62 itojun 1197: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1198: if (nxt == IPPROTO_AH)
1199: elen = (ip6e->ip6e_len + 2) << 2;
1200: else
1201: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1202: if (elen != ext->m_len) {
1203: m_freem(ext);
1.116 thorpej 1204: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1205: return;
1206: }
1.57 thorpej 1207: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1208:
1.35 itojun 1209: switch (nxt) {
1.62 itojun 1210: case IPPROTO_DSTOPTS:
1.127 martin 1211: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1212: break;
1213:
1.97 christos 1214: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1215: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1216: IPPROTO_IPV6);
1.35 itojun 1217: if (*mp)
1218: mp = &(*mp)->m_next;
1219: break;
1220:
1221: case IPPROTO_ROUTING:
1.127 martin 1222: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1223: break;
1224:
1.97 christos 1225: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1226: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1227: IPPROTO_IPV6);
1.35 itojun 1228: if (*mp)
1229: mp = &(*mp)->m_next;
1230: break;
1231:
1.62 itojun 1232: case IPPROTO_HOPOPTS:
1233: case IPPROTO_AH: /* is it possible? */
1234: break;
1235:
1.35 itojun 1236: default:
1237: /*
1.62 itojun 1238: * other cases have been filtered in the above.
1239: * none will visit this case. here we supply
1240: * the code just in case (nxt overwritten or
1241: * other cases).
1.35 itojun 1242: */
1.62 itojun 1243: m_freem(ext);
1.35 itojun 1244: goto loopend;
1245:
1.2 itojun 1246: }
1247:
1248: /* proceed with the next header. */
1.9 itojun 1249: off += elen;
1.2 itojun 1250: nxt = ip6e->ip6e_nxt;
1.62 itojun 1251: ip6e = NULL;
1252: m_freem(ext);
1253: ext = NULL;
1.2 itojun 1254: }
1255: loopend:
1.62 itojun 1256: ;
1.2 itojun 1257: }
1.62 itojun 1258: }
1.85 rpaulo 1259: #undef IS2292
1260:
1261:
1262: void
1.95 dyoung 1263: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1264: uint32_t *mtu)
1.85 rpaulo 1265: {
1266: struct socket *so;
1267: struct mbuf *m_mtu;
1268: struct ip6_mtuinfo mtuctl;
1269:
1270: so = in6p->in6p_socket;
1271:
1272: if (mtu == NULL)
1273: return;
1274:
1275: #ifdef DIAGNOSTIC
1276: if (so == NULL) /* I believe this is impossible */
1277: panic("ip6_notify_pmtu: socket is NULL");
1278: #endif
1279:
1280: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1281: mtuctl.ip6m_mtu = *mtu;
1282: mtuctl.ip6m_addr = *dst;
1283: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1284: return;
1285:
1.97 christos 1286: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1287: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1288: return;
1289:
1.95 dyoung 1290: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1291: == 0) {
1292: m_freem(m_mtu);
1293: /* XXX: should count statistics */
1294: } else
1295: sorwakeup(so);
1296:
1297: return;
1298: }
1.62 itojun 1299:
1300: /*
1301: * pull single extension header from mbuf chain. returns single mbuf that
1302: * contains the result, or NULL on error.
1303: */
1304: static struct mbuf *
1.107 christos 1305: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1306: {
1307: struct ip6_ext ip6e;
1308: size_t elen;
1309: struct mbuf *n;
1310:
1311: #ifdef DIAGNOSTIC
1312: switch (nxt) {
1313: case IPPROTO_DSTOPTS:
1314: case IPPROTO_ROUTING:
1315: case IPPROTO_HOPOPTS:
1316: case IPPROTO_AH: /* is it possible? */
1317: break;
1318: default:
1319: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1320: }
1.62 itojun 1321: #endif
1.2 itojun 1322:
1.97 christos 1323: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1324: if (nxt == IPPROTO_AH)
1325: elen = (ip6e.ip6e_len + 2) << 2;
1326: else
1327: elen = (ip6e.ip6e_len + 1) << 3;
1328:
1329: MGET(n, M_DONTWAIT, MT_DATA);
1330: if (n && elen >= MLEN) {
1331: MCLGET(n, M_DONTWAIT);
1332: if ((n->m_flags & M_EXT) == 0) {
1333: m_free(n);
1334: n = NULL;
1335: }
1336: }
1337: if (!n)
1338: return NULL;
1339:
1340: n->m_len = 0;
1341: if (elen >= M_TRAILINGSPACE(n)) {
1342: m_free(n);
1343: return NULL;
1344: }
1345:
1.97 christos 1346: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1347: n->m_len = elen;
1348: return n;
1.2 itojun 1349: }
1350:
1351: /*
1352: * Get pointer to the previous header followed by the header
1353: * currently processed.
1354: * XXX: This function supposes that
1355: * M includes all headers,
1356: * the next header field and the header length field of each header
1357: * are valid, and
1358: * the sum of each header length equals to OFF.
1359: * Because of these assumptions, this function must be called very
1360: * carefully. Moreover, it will not be used in the near future when
1361: * we develop `neater' mechanism to process extension headers.
1362: */
1.58 itojun 1363: u_int8_t *
1.107 christos 1364: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1365: {
1366: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1367:
1368: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1369: return (&ip6->ip6_nxt);
1.2 itojun 1370: else {
1371: int len, nxt;
1372: struct ip6_ext *ip6e = NULL;
1373:
1374: nxt = ip6->ip6_nxt;
1375: len = sizeof(struct ip6_hdr);
1376: while (len < off) {
1.97 christos 1377: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1378:
1.35 itojun 1379: switch (nxt) {
1.2 itojun 1380: case IPPROTO_FRAGMENT:
1381: len += sizeof(struct ip6_frag);
1382: break;
1383: case IPPROTO_AH:
1384: len += (ip6e->ip6e_len + 2) << 2;
1385: break;
1386: default:
1387: len += (ip6e->ip6e_len + 1) << 3;
1388: break;
1389: }
1390: nxt = ip6e->ip6e_nxt;
1391: }
1392: if (ip6e)
1.58 itojun 1393: return (&ip6e->ip6e_nxt);
1.2 itojun 1394: else
1395: return NULL;
1.18 itojun 1396: }
1397: }
1398:
1399: /*
1400: * get next header offset. m will be retained.
1401: */
1402: int
1.107 christos 1403: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1404: {
1405: struct ip6_hdr ip6;
1406: struct ip6_ext ip6e;
1407: struct ip6_frag fh;
1408:
1409: /* just in case */
1410: if (m == NULL)
1411: panic("ip6_nexthdr: m == NULL");
1412: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1413: return -1;
1414:
1415: switch (proto) {
1416: case IPPROTO_IPV6:
1.83 rpaulo 1417: /* do not chase beyond intermediate IPv6 headers */
1418: if (off != 0)
1419: return -1;
1.18 itojun 1420: if (m->m_pkthdr.len < off + sizeof(ip6))
1421: return -1;
1.97 christos 1422: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1423: if (nxtp)
1424: *nxtp = ip6.ip6_nxt;
1425: off += sizeof(ip6);
1426: return off;
1427:
1428: case IPPROTO_FRAGMENT:
1429: /*
1430: * terminate parsing if it is not the first fragment,
1431: * it does not make sense to parse through it.
1432: */
1433: if (m->m_pkthdr.len < off + sizeof(fh))
1434: return -1;
1.97 christos 1435: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1436: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1437: return -1;
1438: if (nxtp)
1439: *nxtp = fh.ip6f_nxt;
1440: off += sizeof(struct ip6_frag);
1441: return off;
1442:
1443: case IPPROTO_AH:
1444: if (m->m_pkthdr.len < off + sizeof(ip6e))
1445: return -1;
1.97 christos 1446: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1447: if (nxtp)
1448: *nxtp = ip6e.ip6e_nxt;
1449: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1450: if (m->m_pkthdr.len < off)
1451: return -1;
1.18 itojun 1452: return off;
1453:
1454: case IPPROTO_HOPOPTS:
1455: case IPPROTO_ROUTING:
1456: case IPPROTO_DSTOPTS:
1457: if (m->m_pkthdr.len < off + sizeof(ip6e))
1458: return -1;
1.97 christos 1459: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1460: if (nxtp)
1461: *nxtp = ip6e.ip6e_nxt;
1462: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1463: if (m->m_pkthdr.len < off)
1464: return -1;
1.18 itojun 1465: return off;
1466:
1467: case IPPROTO_NONE:
1468: case IPPROTO_ESP:
1469: case IPPROTO_IPCOMP:
1470: /* give up */
1471: return -1;
1472:
1473: default:
1474: return -1;
1475: }
1476: }
1477:
1478: /*
1479: * get offset for the last header in the chain. m will be kept untainted.
1480: */
1481: int
1.107 christos 1482: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1483: {
1484: int newoff;
1485: int nxt;
1486:
1487: if (!nxtp) {
1488: nxt = -1;
1489: nxtp = &nxt;
1490: }
1.86 rpaulo 1491: for (;;) {
1.18 itojun 1492: newoff = ip6_nexthdr(m, off, proto, nxtp);
1493: if (newoff < 0)
1494: return off;
1495: else if (newoff < off)
1496: return -1; /* invalid */
1497: else if (newoff == off)
1498: return newoff;
1499:
1500: off = newoff;
1501: proto = *nxtp;
1.2 itojun 1502: }
1503: }
1504:
1.81 rpaulo 1505: struct m_tag *
1.107 christos 1506: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1507: {
1508: struct m_tag *mtag;
1509:
1510: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1511: if (!mtag) {
1512: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1513: M_NOWAIT);
1514: if (mtag) {
1515: m_tag_prepend(m, mtag);
1.124 cegger 1516: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1517: }
1518: }
1519: return mtag;
1520: }
1521:
1522: struct m_tag *
1.107 christos 1523: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1524: {
1525: struct m_tag *mtag;
1526:
1527: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1528: return mtag;
1529: }
1530:
1531: void
1.107 christos 1532: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1533: {
1534: struct m_tag *mtag;
1535:
1536: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1537: if (mtag)
1538: m_tag_delete(m, mtag);
1539: }
1540:
1.2 itojun 1541: /*
1542: * System control for IP6
1543: */
1544:
1.120 matt 1545: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1546: 0, 0, 0, 0,
1547: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1548: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1549: EMSGSIZE, EHOSTUNREACH, 0, 0,
1550: 0, 0, 0, 0,
1551: ENOPROTOOPT
1552: };
1553:
1.149.4.3 skrll 1554: extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS);
1555:
1.116 thorpej 1556: static int
1557: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1558: {
1559:
1.119 thorpej 1560: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1561: }
1562:
1.128 pooka 1563: static void
1564: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1565: {
1.85 rpaulo 1566: #ifdef RFC2292
1567: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1568: #else
1569: #define IS2292(x, y) (y)
1570: #endif
1.26 itojun 1571:
1.73 atatat 1572: sysctl_createv(clog, 0, NULL, NULL,
1573: CTLFLAG_PERMANENT,
1.74 atatat 1574: CTLTYPE_NODE, "inet6",
1575: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1576: NULL, 0, NULL, 0,
1577: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1578: sysctl_createv(clog, 0, NULL, NULL,
1579: CTLFLAG_PERMANENT,
1.74 atatat 1580: CTLTYPE_NODE, "ip6",
1581: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1582: NULL, 0, NULL, 0,
1583: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1584:
1.73 atatat 1585: sysctl_createv(clog, 0, NULL, NULL,
1586: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1587: CTLTYPE_INT, "forwarding",
1588: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1589: NULL, 0, &ip6_forwarding, 0,
1590: CTL_NET, PF_INET6, IPPROTO_IPV6,
1591: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1592: sysctl_createv(clog, 0, NULL, NULL,
1593: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1594: CTLTYPE_INT, "redirect",
1595: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1596: NULL, 0, &ip6_sendredirects, 0,
1597: CTL_NET, PF_INET6, IPPROTO_IPV6,
1598: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1599: sysctl_createv(clog, 0, NULL, NULL,
1600: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1601: CTLTYPE_INT, "hlim",
1602: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1603: NULL, 0, &ip6_defhlim, 0,
1604: CTL_NET, PF_INET6, IPPROTO_IPV6,
1605: IPV6CTL_DEFHLIM, CTL_EOL);
1606: #ifdef notyet
1.73 atatat 1607: sysctl_createv(clog, 0, NULL, NULL,
1608: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1609: CTLTYPE_INT, "mtu", NULL,
1610: NULL, 0, &, 0,
1611: CTL_NET, PF_INET6, IPPROTO_IPV6,
1612: IPV6CTL_DEFMTU, CTL_EOL);
1613: #endif
1614: #ifdef __no_idea__
1.73 atatat 1615: sysctl_createv(clog, 0, NULL, NULL,
1616: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1617: CTLTYPE_INT, "forwsrcrt", NULL,
1618: NULL, 0, &?, 0,
1619: CTL_NET, PF_INET6, IPPROTO_IPV6,
1620: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1621: sysctl_createv(clog, 0, NULL, NULL,
1622: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1623: CTLTYPE_STRUCT, "mrtstats", NULL,
1624: NULL, 0, &?, sizeof(?),
1625: CTL_NET, PF_INET6, IPPROTO_IPV6,
1626: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1627: sysctl_createv(clog, 0, NULL, NULL,
1628: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1629: CTLTYPE_?, "mrtproto", NULL,
1630: NULL, 0, &?, sizeof(?),
1631: CTL_NET, PF_INET6, IPPROTO_IPV6,
1632: IPV6CTL_MRTPROTO, CTL_EOL);
1633: #endif
1.73 atatat 1634: sysctl_createv(clog, 0, NULL, NULL,
1635: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1636: CTLTYPE_INT, "maxfragpackets",
1637: SYSCTL_DESCR("Maximum number of fragments to buffer "
1638: "for reassembly"),
1.70 atatat 1639: NULL, 0, &ip6_maxfragpackets, 0,
1640: CTL_NET, PF_INET6, IPPROTO_IPV6,
1641: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1642: #ifdef __no_idea__
1.73 atatat 1643: sysctl_createv(clog, 0, NULL, NULL,
1644: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1645: CTLTYPE_INT, "sourcecheck", NULL,
1646: NULL, 0, &?, 0,
1647: CTL_NET, PF_INET6, IPPROTO_IPV6,
1648: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1649: sysctl_createv(clog, 0, NULL, NULL,
1650: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1651: CTLTYPE_INT, "sourcecheck_logint", NULL,
1652: NULL, 0, &?, 0,
1653: CTL_NET, PF_INET6, IPPROTO_IPV6,
1654: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1655: #endif
1.73 atatat 1656: sysctl_createv(clog, 0, NULL, NULL,
1657: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1658: CTLTYPE_INT, "accept_rtadv",
1659: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1660: NULL, 0, &ip6_accept_rtadv, 0,
1661: CTL_NET, PF_INET6, IPPROTO_IPV6,
1662: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1663: sysctl_createv(clog, 0, NULL, NULL,
1664: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1665: CTLTYPE_INT, "rtadv_maxroutes",
1666: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1667: NULL, 0, &ip6_rtadv_maxroutes, 0,
1668: CTL_NET, PF_INET6, IPPROTO_IPV6,
1669: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1670: sysctl_createv(clog, 0, NULL, NULL,
1671: CTLFLAG_PERMANENT,
1672: CTLTYPE_INT, "rtadv_numroutes",
1673: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1674: NULL, 0, &nd6_numroutes, 0,
1675: CTL_NET, PF_INET6, IPPROTO_IPV6,
1676: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1677: sysctl_createv(clog, 0, NULL, NULL,
1678: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1679: CTLTYPE_INT, "keepfaith",
1680: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1681: NULL, 0, &ip6_keepfaith, 0,
1682: CTL_NET, PF_INET6, IPPROTO_IPV6,
1683: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1684: sysctl_createv(clog, 0, NULL, NULL,
1685: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1686: CTLTYPE_INT, "log_interval",
1687: SYSCTL_DESCR("Minumum interval between logging "
1688: "unroutable packets"),
1.70 atatat 1689: NULL, 0, &ip6_log_interval, 0,
1690: CTL_NET, PF_INET6, IPPROTO_IPV6,
1691: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1692: sysctl_createv(clog, 0, NULL, NULL,
1693: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1694: CTLTYPE_INT, "hdrnestlimit",
1695: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1696: NULL, 0, &ip6_hdrnestlimit, 0,
1697: CTL_NET, PF_INET6, IPPROTO_IPV6,
1698: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1699: sysctl_createv(clog, 0, NULL, NULL,
1700: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1701: CTLTYPE_INT, "dad_count",
1702: SYSCTL_DESCR("Number of Duplicate Address Detection "
1703: "probes to send"),
1.70 atatat 1704: NULL, 0, &ip6_dad_count, 0,
1705: CTL_NET, PF_INET6, IPPROTO_IPV6,
1706: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1707: sysctl_createv(clog, 0, NULL, NULL,
1708: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1709: CTLTYPE_INT, "auto_flowlabel",
1710: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1711: NULL, 0, &ip6_auto_flowlabel, 0,
1712: CTL_NET, PF_INET6, IPPROTO_IPV6,
1713: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1714: sysctl_createv(clog, 0, NULL, NULL,
1715: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1716: CTLTYPE_INT, "defmcasthlim",
1717: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1718: NULL, 0, &ip6_defmcasthlim, 0,
1719: CTL_NET, PF_INET6, IPPROTO_IPV6,
1720: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.73 atatat 1721: sysctl_createv(clog, 0, NULL, NULL,
1722: CTLFLAG_PERMANENT,
1.74 atatat 1723: CTLTYPE_STRING, "kame_version",
1724: SYSCTL_DESCR("KAME Version"),
1.78 christos 1725: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1726: CTL_NET, PF_INET6, IPPROTO_IPV6,
1727: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1728: sysctl_createv(clog, 0, NULL, NULL,
1729: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1730: CTLTYPE_INT, "use_deprecated",
1731: SYSCTL_DESCR("Allow use of deprecated addresses as "
1732: "source addresses"),
1.70 atatat 1733: NULL, 0, &ip6_use_deprecated, 0,
1734: CTL_NET, PF_INET6, IPPROTO_IPV6,
1735: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1736: sysctl_createv(clog, 0, NULL, NULL,
1737: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1738: CTLTYPE_INT, "rr_prune", NULL,
1739: NULL, 0, &ip6_rr_prune, 0,
1740: CTL_NET, PF_INET6, IPPROTO_IPV6,
1741: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1742: sysctl_createv(clog, 0, NULL, NULL,
1743: CTLFLAG_PERMANENT
1.70 atatat 1744: #ifndef INET6_BINDV6ONLY
1.73 atatat 1745: |CTLFLAG_READWRITE,
1.70 atatat 1746: #endif
1.74 atatat 1747: CTLTYPE_INT, "v6only",
1748: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1749: "to PF_INET sockets"),
1.70 atatat 1750: NULL, 0, &ip6_v6only, 0,
1751: CTL_NET, PF_INET6, IPPROTO_IPV6,
1752: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1753: sysctl_createv(clog, 0, NULL, NULL,
1754: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1755: CTLTYPE_INT, "anonportmin",
1756: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1757: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1758: CTL_NET, PF_INET6, IPPROTO_IPV6,
1759: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1760: sysctl_createv(clog, 0, NULL, NULL,
1761: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1762: CTLTYPE_INT, "anonportmax",
1763: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1764: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1765: CTL_NET, PF_INET6, IPPROTO_IPV6,
1766: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1767: #ifndef IPNOPRIVPORTS
1.73 atatat 1768: sysctl_createv(clog, 0, NULL, NULL,
1769: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1770: CTLTYPE_INT, "lowportmin",
1771: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1772: "to assign"),
1.70 atatat 1773: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1774: CTL_NET, PF_INET6, IPPROTO_IPV6,
1775: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1776: sysctl_createv(clog, 0, NULL, NULL,
1777: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1778: CTLTYPE_INT, "lowportmax",
1779: SYSCTL_DESCR("Highest privileged ephemeral port number "
1780: "to assign"),
1.70 atatat 1781: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1782: CTL_NET, PF_INET6, IPPROTO_IPV6,
1783: IPV6CTL_LOWPORTMAX, CTL_EOL);
1784: #endif /* IPNOPRIVPORTS */
1.73 atatat 1785: sysctl_createv(clog, 0, NULL, NULL,
1786: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.149.4.3 skrll 1787: CTLTYPE_INT, "auto_linklocal",
1788: SYSCTL_DESCR("Default value of per-interface flag for "
1789: "adding an IPv6 link-local address to "
1790: "interfaces when attached"),
1791: NULL, 0, &ip6_auto_linklocal, 0,
1792: CTL_NET, PF_INET6, IPPROTO_IPV6,
1793: IPV6CTL_AUTO_LINKLOCAL, CTL_EOL);
1794: sysctl_createv(clog, 0, NULL, NULL,
1795: CTLFLAG_PERMANENT|CTLFLAG_READONLY,
1796: CTLTYPE_STRUCT, "addctlpolicy",
1797: SYSCTL_DESCR("Return the current address control"
1798: " policy"),
1799: sysctl_net_inet6_addrctlpolicy, 0, NULL, 0,
1800: CTL_NET, PF_INET6, IPPROTO_IPV6,
1801: IPV6CTL_ADDRCTLPOLICY, CTL_EOL);
1802: sysctl_createv(clog, 0, NULL, NULL,
1803: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1804: CTLTYPE_INT, "use_tempaddr",
1805: SYSCTL_DESCR("Use temporary address"),
1806: NULL, 0, &ip6_use_tempaddr, 0,
1807: CTL_NET, PF_INET6, IPPROTO_IPV6,
1808: CTL_CREATE, CTL_EOL);
1809: sysctl_createv(clog, 0, NULL, NULL,
1810: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.149.4.1 skrll 1811: CTLTYPE_INT, "prefer_tempaddr",
1812: SYSCTL_DESCR("Prefer temporary address as source "
1813: "address"),
1814: NULL, 0, &ip6_prefer_tempaddr, 0,
1815: CTL_NET, PF_INET6, IPPROTO_IPV6,
1816: CTL_CREATE, CTL_EOL);
1817: sysctl_createv(clog, 0, NULL, NULL,
1818: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1819: CTLTYPE_INT, "temppltime",
1820: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1821: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1822: CTL_NET, PF_INET6, IPPROTO_IPV6,
1823: CTL_CREATE, CTL_EOL);
1824: sysctl_createv(clog, 0, NULL, NULL,
1825: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1826: CTLTYPE_INT, "tempvltime",
1827: SYSCTL_DESCR("valid lifetime of a temporary address"),
1828: NULL, 0, &ip6_temp_valid_lifetime, 0,
1829: CTL_NET, PF_INET6, IPPROTO_IPV6,
1830: CTL_CREATE, CTL_EOL);
1831: sysctl_createv(clog, 0, NULL, NULL,
1832: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1833: CTLTYPE_INT, "maxfrags",
1834: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1835: NULL, 0, &ip6_maxfrags, 0,
1836: CTL_NET, PF_INET6, IPPROTO_IPV6,
1837: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1838: sysctl_createv(clog, 0, NULL, NULL,
1839: CTLFLAG_PERMANENT,
1840: CTLTYPE_STRUCT, "stats",
1841: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1842: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1843: CTL_NET, PF_INET6, IPPROTO_IPV6,
1844: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1845: sysctl_createv(clog, 0, NULL, NULL,
1846: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1847: CTLTYPE_INT, "use_defaultzone",
1848: SYSCTL_DESCR("Whether to use the default scope zones"),
1849: NULL, 0, &ip6_use_defzone, 0,
1850: CTL_NET, PF_INET6, IPPROTO_IPV6,
1851: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1852: sysctl_createv(clog, 0, NULL, NULL,
1853: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1854: CTLTYPE_INT, "mcast_pmtu",
1855: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1856: NULL, 0, &ip6_mcast_pmtu, 0,
1857: CTL_NET, PF_INET6, IPPROTO_IPV6,
1858: CTL_CREATE, CTL_EOL);
1.138 christos 1859: /* anonportalgo RFC6056 subtree */
1.140 christos 1860: const struct sysctlnode *portalgo_node;
1861: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1862: CTLFLAG_PERMANENT,
1863: CTLTYPE_NODE, "anonportalgo",
1864: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1865: NULL, 0, NULL, 0,
1866: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1867: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1868: CTLFLAG_PERMANENT,
1869: CTLTYPE_STRING, "available",
1870: SYSCTL_DESCR("available algorithms"),
1.140 christos 1871: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1872: CTL_CREATE, CTL_EOL);
1.140 christos 1873: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1874: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1875: CTLTYPE_STRING, "selected",
1876: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1877: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1878: CTL_CREATE, CTL_EOL);
1.141 christos 1879: sysctl_createv(clog, 0, &portalgo_node, NULL,
1880: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1881: CTLTYPE_STRUCT, "reserve",
1882: SYSCTL_DESCR("bitmap of reserved ports"),
1883: sysctl_portalgo_reserve6, 0, NULL, 0,
1884: CTL_CREATE, CTL_EOL);
1.139 christos 1885: sysctl_createv(clog, 0, NULL, NULL,
1886: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1887: CTLTYPE_INT, "neighborgcthresh",
1888: SYSCTL_DESCR("Maximum number of entries in neighbor"
1889: " cache"),
1890: NULL, 1, &ip6_neighborgcthresh, 0,
1891: CTL_NET, PF_INET6, IPPROTO_IPV6,
1892: CTL_CREATE, CTL_EOL);
1893: sysctl_createv(clog, 0, NULL, NULL,
1894: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1895: CTLTYPE_INT, "maxifprefixes",
1896: SYSCTL_DESCR("Maximum number of prefixes created by"
1897: " route advertisement per interface"),
1898: NULL, 1, &ip6_maxifprefixes, 0,
1899: CTL_NET, PF_INET6, IPPROTO_IPV6,
1900: CTL_CREATE, CTL_EOL);
1901: sysctl_createv(clog, 0, NULL, NULL,
1902: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1903: CTLTYPE_INT, "maxifdefrouters",
1904: SYSCTL_DESCR("Maximum number of default routers created"
1905: " by route advertisement per interface"),
1906: NULL, 1, &ip6_maxifdefrouters, 0,
1907: CTL_NET, PF_INET6, IPPROTO_IPV6,
1908: CTL_CREATE, CTL_EOL);
1909: sysctl_createv(clog, 0, NULL, NULL,
1910: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1911: CTLTYPE_INT, "maxdynroutes",
1912: SYSCTL_DESCR("Maximum number of routes created via"
1913: " redirect"),
1914: NULL, 1, &ip6_maxdynroutes, 0,
1915: CTL_NET, PF_INET6, IPPROTO_IPV6,
1916: CTL_CREATE, CTL_EOL);
1.2 itojun 1917: }
1.116 thorpej 1918:
1919: void
1920: ip6_statinc(u_int stat)
1921: {
1922:
1923: KASSERT(stat < IP6_NSTATS);
1924: IP6_STATINC(stat);
1925: }
CVSweb <webmaster@jp.NetBSD.org>