Annotation of src/sys/netinet6/ip6_input.c, Revision 1.133
1.133 ! tls 1: /* $NetBSD: ip6_input.c,v 1.132 2011/06/01 22:59:44 dyoung 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>
1.133 ! tls 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.132 2011/06/01 22:59:44 dyoung Exp $");
1.2 itojun 66:
1.129 joerg 67: #include "opt_gateway.h"
1.2 itojun 68: #include "opt_inet.h"
1.85 rpaulo 69: #include "opt_inet6.h"
1.4 thorpej 70: #include "opt_ipsec.h"
1.15 darrenr 71: #include "opt_pfil_hooks.h"
1.123 christos 72: #include "opt_compat_netbsd.h"
1.2 itojun 73:
74: #include <sys/param.h>
75: #include <sys/systm.h>
76: #include <sys/malloc.h>
77: #include <sys/mbuf.h>
78: #include <sys/domain.h>
79: #include <sys/protosw.h>
80: #include <sys/socket.h>
81: #include <sys/socketvar.h>
82: #include <sys/errno.h>
83: #include <sys/time.h>
84: #include <sys/kernel.h>
85: #include <sys/syslog.h>
86: #include <sys/proc.h>
1.46 simonb 87: #include <sys/sysctl.h>
1.133 ! tls 88: #include <sys/cprng.h>
1.2 itojun 89:
90: #include <net/if.h>
91: #include <net/if_types.h>
92: #include <net/if_dl.h>
93: #include <net/route.h>
94: #include <net/netisr.h>
1.15 darrenr 95: #ifdef PFIL_HOOKS
96: #include <net/pfil.h>
97: #endif
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>
103: #include <netinet/ip_icmp.h>
1.45 itojun 104: #endif /* INET */
1.14 itojun 105: #include <netinet/ip6.h>
1.2 itojun 106: #include <netinet6/in6_var.h>
1.11 itojun 107: #include <netinet6/ip6_var.h>
1.116 thorpej 108: #include <netinet6/ip6_private.h>
1.2 itojun 109: #include <netinet6/in6_pcb.h>
1.14 itojun 110: #include <netinet/icmp6.h>
1.81 rpaulo 111: #include <netinet6/scope6_var.h>
1.2 itojun 112: #include <netinet6/in6_ifattach.h>
113: #include <netinet6/nd6.h>
114:
1.37 itojun 115: #ifdef IPSEC
116: #include <netinet6/ipsec.h>
1.117 thorpej 117: #include <netinet6/ipsec_private.h>
1.37 itojun 118: #endif
119:
1.94 degroote 120: #ifdef FAST_IPSEC
121: #include <netipsec/ipsec.h>
122: #include <netipsec/ipsec6.h>
123: #include <netipsec/key.h>
124: #endif /* FAST_IPSEC */
125:
1.123 christos 126: #ifdef COMPAT_50
127: #include <compat/sys/time.h>
128: #include <compat/sys/socket.h>
129: #endif
130:
1.2 itojun 131: #include <netinet6/ip6protosw.h>
132:
133: #include "faith.h"
134: #include "gif.h"
1.50 itojun 135:
136: #if NGIF > 0
137: #include <netinet6/in6_gif.h>
138: #endif
1.2 itojun 139:
1.9 itojun 140: #include <net/net_osdep.h>
141:
1.2 itojun 142: extern struct domain inet6domain;
143:
144: u_char ip6_protox[IPPROTO_MAX];
145: static int ip6qmaxlen = IFQ_MAXLEN;
146: struct in6_ifaddr *in6_ifaddr;
147: struct ifqueue ip6intrq;
148:
1.108 ad 149: extern callout_t in6_tmpaddrtimer_ch;
1.83 rpaulo 150:
1.2 itojun 151: int ip6_forward_srcrt; /* XXX */
152: int ip6_sourcecheck; /* XXX */
153: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 154:
1.29 thorpej 155: #ifdef PFIL_HOOKS
156: struct pfil_head inet6_pfil_hook;
157: #endif
158:
1.116 thorpej 159: percpu_t *ip6stat_percpu;
1.2 itojun 160:
1.111 dyoung 161: static void ip6_init2(void *);
1.112 dyoung 162: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 163:
1.111 dyoung 164: static int ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *);
165: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.128 pooka 166: static void sysctl_net_inet6_ip6_setup(struct sysctllog **);
1.2 itojun 167:
168: /*
169: * IP6 initialization: fill in IP6 protocol switch table.
170: * All protocols not implemented in kernel go to raw IP6 protocol handler.
171: */
172: void
1.114 matt 173: ip6_init(void)
1.2 itojun 174: {
1.78 christos 175: const struct ip6protosw *pr;
1.35 itojun 176: int i;
1.2 itojun 177:
1.128 pooka 178: sysctl_net_inet6_ip6_setup(NULL);
1.78 christos 179: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 180: if (pr == 0)
181: panic("ip6_init");
182: for (i = 0; i < IPPROTO_MAX; i++)
183: ip6_protox[i] = pr - inet6sw;
1.78 christos 184: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
185: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 186: if (pr->pr_domain->dom_family == PF_INET6 &&
187: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
188: ip6_protox[pr->pr_protocol] = pr - inet6sw;
189: ip6intrq.ifq_maxlen = ip6qmaxlen;
1.81 rpaulo 190: scope6_init();
191: addrsel_policy_init();
1.2 itojun 192: nd6_init();
193: frag6_init();
1.133 ! tls 194: ip6_desync_factor = cprng_fast32() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 195:
196: ip6_init2((void *)0);
1.98 liamjfoy 197: #ifdef GATEWAY
1.99 liamjfoy 198: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 199: #endif
1.29 thorpej 200:
201: #ifdef PFIL_HOOKS
202: /* Register our Packet Filter hook. */
1.33 thorpej 203: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
204: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 205: i = pfil_head_register(&inet6_pfil_hook);
206: if (i != 0)
207: printf("ip6_init: WARNING: unable to register pfil hook, "
208: "error %d\n", i);
209: #endif /* PFIL_HOOKS */
1.116 thorpej 210:
211: ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS);
1.2 itojun 212: }
213:
214: static void
1.90 christos 215: ip6_init2(void *dummy)
1.2 itojun 216: {
217:
218: /* nd6_timer_init */
1.118 ad 219: callout_init(&nd6_timer_ch, CALLOUT_MPSAFE);
1.19 thorpej 220: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83 rpaulo 221:
222: /* timer for regeneranation of temporary addresses randomize ID */
1.118 ad 223: callout_init(&in6_tmpaddrtimer_ch, CALLOUT_MPSAFE);
1.83 rpaulo 224: callout_reset(&in6_tmpaddrtimer_ch,
225: (ip6_temp_preferred_lifetime - ip6_desync_factor -
226: ip6_temp_regen_advance) * hz,
227: in6_tmpaddrtimer, NULL);
1.2 itojun 228: }
229:
230: /*
231: * IP6 input interrupt handling. Just pass the packet to ip6_input.
232: */
233: void
1.114 matt 234: ip6intr(void)
1.2 itojun 235: {
236: int s;
237: struct mbuf *m;
238:
1.118 ad 239: mutex_enter(softnet_lock);
240: KERNEL_LOCK(1, NULL);
1.2 itojun 241: for (;;) {
1.41 thorpej 242: s = splnet();
1.2 itojun 243: IF_DEQUEUE(&ip6intrq, m);
244: splx(s);
245: if (m == 0)
1.118 ad 246: break;
1.83 rpaulo 247: /* drop the packet if IPv6 operation is disabled on the IF */
248: if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {
249: m_freem(m);
1.118 ad 250: break;
1.83 rpaulo 251: }
1.2 itojun 252: ip6_input(m);
253: }
1.118 ad 254: KERNEL_UNLOCK_ONE(NULL);
255: mutex_exit(softnet_lock);
1.2 itojun 256: }
257:
1.103 dyoung 258: extern struct route ip6_forward_rt;
1.2 itojun 259:
260: void
1.96 dyoung 261: ip6_input(struct mbuf *m)
1.2 itojun 262: {
1.9 itojun 263: struct ip6_hdr *ip6;
1.105 dyoung 264: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 265: u_int32_t plen;
1.5 itojun 266: u_int32_t rtalert = ~0;
1.104 yamt 267: int nxt, ours = 0, rh_present = 0;
1.9 itojun 268: struct ifnet *deliverifp = NULL;
1.64 itojun 269: int srcrt = 0;
1.105 dyoung 270: const struct rtentry *rt;
271: union {
272: struct sockaddr dst;
273: struct sockaddr_in6 dst6;
274: } u;
1.94 degroote 275: #ifdef FAST_IPSEC
276: struct m_tag *mtag;
277: struct tdb_ident *tdbi;
278: struct secpolicy *sp;
279: int s, error;
280: #endif
1.2 itojun 281:
282: #ifdef IPSEC
283: /*
284: * should the inner packet be considered authentic?
285: * see comment in ah4_input().
286: */
1.49 itojun 287: m->m_flags &= ~M_AUTHIPHDR;
288: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 289: #endif
1.9 itojun 290:
1.2 itojun 291: /*
1.81 rpaulo 292: * make sure we don't have onion peering information into m_tag.
293: */
294: ip6_delaux(m);
295:
296: /*
1.44 itojun 297: * mbuf statistics
1.2 itojun 298: */
299: if (m->m_flags & M_EXT) {
300: if (m->m_next)
1.116 thorpej 301: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 302: else
1.116 thorpej 303: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 304: } else {
1.115 thorpej 305: #define M2MMAX 32
1.2 itojun 306: if (m->m_next) {
1.9 itojun 307: if (m->m_flags & M_LOOP) {
1.116 thorpej 308: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.115 thorpej 309: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX) {
1.116 thorpej 310: IP6_STATINC(IP6_STAT_M2M +
311: m->m_pkthdr.rcvif->if_index);
1.115 thorpej 312: } else
1.116 thorpej 313: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 314: } else
1.116 thorpej 315: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 316: #undef M2MMAX
1.2 itojun 317: }
318:
1.9 itojun 319: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
1.116 thorpej 320: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 321:
1.57 thorpej 322: /*
323: * If the IPv6 header is not aligned, slurp it up into a new
324: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 325: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 326: * IPv6 header is in the first mbuf of the chain.
327: */
1.97 christos 328: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 329: struct ifnet *inifp = m->m_pkthdr.rcvif;
330: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
331: (max_linkhdr + 3) & ~3)) == NULL) {
332: /* XXXJRT new stat, please */
1.116 thorpej 333: IP6_STATINC(IP6_STAT_TOOSMALL);
1.57 thorpej 334: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
335: return;
336: }
337: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
338: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 339: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 340: IP6_STATINC(IP6_STAT_TOOSMALL);
1.9 itojun 341: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
342: return;
343: }
1.2 itojun 344: }
345:
346: ip6 = mtod(m, struct ip6_hdr *);
347:
348: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 349: IP6_STATINC(IP6_STAT_BADVERS);
1.9 itojun 350: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 351: goto bad;
352: }
1.15 darrenr 353:
1.98 liamjfoy 354: #if defined(IPSEC)
355: /* IPv6 fast forwarding is not compatible with IPsec. */
356: m->m_flags &= ~M_CANFASTFWD;
357: #else
358: /*
359: * Assume that we can create a fast-forward IP flow entry
360: * based on this packet.
361: */
362: m->m_flags |= M_CANFASTFWD;
363: #endif
364:
1.15 darrenr 365: #ifdef PFIL_HOOKS
366: /*
367: * Run through list of hooks for input packets. If there are any
368: * filters which require that additional packets in the flow are
369: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
370: * Note that filters must _never_ set this flag, as another filter
371: * in the list may have previously cleared it.
372: */
1.39 itojun 373: /*
374: * let ipfilter look at packet on the wire,
375: * not the decapsulated packet.
376: */
377: #ifdef IPSEC
1.42 itojun 378: if (!ipsec_getnhist(m))
1.94 degroote 379: #elif defined(FAST_IPSEC)
380: if (!ipsec_indone(m))
1.39 itojun 381: #else
382: if (1)
383: #endif
384: {
1.64 itojun 385: struct in6_addr odst;
386:
387: odst = ip6->ip6_dst;
1.39 itojun 388: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
389: PFIL_IN) != 0)
390: return;
391: if (m == NULL)
392: return;
393: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 394: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 395: }
1.15 darrenr 396: #endif /* PFIL_HOOKS */
397:
1.116 thorpej 398: IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt);
1.2 itojun 399:
1.30 thorpej 400: #ifdef ALTQ
401: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
402: /* packet is dropped by traffic conditioner */
403: return;
1.9 itojun 404: }
405: #endif
406:
1.2 itojun 407: /*
1.44 itojun 408: * Check against address spoofing/corruption.
1.2 itojun 409: */
410: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
411: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 412: /*
413: * XXX: "badscope" is not very suitable for a multicast source.
414: */
1.116 thorpej 415: IP6_STATINC(IP6_STAT_BADSCOPE);
1.9 itojun 416: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 417: goto bad;
418: }
1.13 itojun 419: /*
1.44 itojun 420: * The following check is not documented in specs. A malicious
421: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
422: * and bypass security checks (act as if it was from 127.0.0.1 by using
423: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 424: *
1.44 itojun 425: * This check chokes if we are in an SIIT cloud. As none of BSDs
426: * support IPv4-less kernel compilation, we cannot support SIIT
427: * environment at all. So, it makes more sense for us to reject any
428: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 429: * partial support for SIIT environment.
1.13 itojun 430: */
431: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
432: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 433: IP6_STATINC(IP6_STAT_BADSCOPE);
1.13 itojun 434: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
435: goto bad;
436: }
1.17 itojun 437: #if 0
1.13 itojun 438: /*
1.17 itojun 439: * Reject packets with IPv4 compatible addresses (auto tunnel).
440: *
441: * The code forbids auto tunnel relay case in RFC1933 (the check is
442: * stronger than RFC1933). We may want to re-enable it if mech-xx
443: * is revised to forbid relaying case.
1.13 itojun 444: */
445: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
446: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
1.116 thorpej 447: IP6_STATINC(IP6_STAT_BADSCOPE);
1.13 itojun 448: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
449: goto bad;
450: }
451: #endif
1.35 itojun 452:
1.2 itojun 453: /*
1.82 yamt 454: * Disambiguate address scope zones (if there is ambiguity).
455: * We first make sure that the original source or destination address
456: * is not in our internal form for scoped addresses. Such addresses
457: * are not necessarily invalid spec-wise, but we cannot accept them due
458: * to the usage conflict.
459: * in6_setscope() then also checks and rejects the cases where src or
460: * dst are the loopback address and the receiving interface
461: * is not loopback.
462: */
1.88 bouyer 463: if (__predict_false(
464: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
465: goto bad;
466: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 467: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 468: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 469: goto bad;
470: }
471: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
472: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
1.116 thorpej 473: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 474: goto bad;
475: }
476:
477: /*
1.2 itojun 478: * Multicast check
479: */
480: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
481: struct in6_multi *in6m = 0;
1.9 itojun 482:
483: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 484: /*
485: * See if we belong to the destination multicast group on the
486: * arrival interface.
487: */
488: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
489: if (in6m)
490: ours = 1;
491: else if (!ip6_mrouter) {
1.116 thorpej 492: uint64_t *ip6s = IP6_STAT_GETREF();
493: ip6s[IP6_STAT_NOTMEMBER]++;
494: ip6s[IP6_STAT_CANTFORWARD]++;
495: IP6_STAT_PUTREF();
1.9 itojun 496: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 497: goto bad;
498: }
1.9 itojun 499: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 500: goto hbhcheck;
501: }
502:
1.105 dyoung 503: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
504:
1.2 itojun 505: /*
506: * Unicast check
507: */
1.105 dyoung 508: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
509: if (hit)
1.116 thorpej 510: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 511: else
1.116 thorpej 512: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 513:
1.109 dyoung 514: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 515:
516: /*
517: * Accept the packet if the forwarding interface to the destination
518: * according to the routing table is the loopback interface,
519: * unless the associated route has a gateway.
520: * Note that this approach causes to accept a packet if there is a
521: * route to the loopback interface for the destination of the packet.
522: * But we think it's even useful in some situations, e.g. when using
523: * a special daemon which wants to intercept the packet.
524: */
1.105 dyoung 525: if (rt != NULL &&
526: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
527: !(rt->rt_flags & RTF_CLONED) &&
1.2 itojun 528: #if 0
529: /*
530: * The check below is redundant since the comparison of
531: * the destination and the key of the rtentry has
532: * already done through looking up the routing table.
533: */
1.109 dyoung 534: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 535: #endif
1.105 dyoung 536: rt->rt_ifp->if_type == IFT_LOOP) {
537: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 538: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
539: m->m_flags |= M_ANYCAST6;
1.24 itojun 540: /*
541: * packets to a tentative, duplicated, or somehow invalid
542: * address must not be accepted.
543: */
1.2 itojun 544: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 545: /* this address is ready */
1.2 itojun 546: ours = 1;
1.9 itojun 547: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 548: goto hbhcheck;
549: } else {
1.24 itojun 550: /* address is not ready, so discard the packet. */
1.34 itojun 551: nd6log((LOG_INFO,
1.27 itojun 552: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 553: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 554: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 555:
556: goto bad;
1.2 itojun 557: }
558: }
559:
560: /*
1.55 itojun 561: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 562: */
563: #if defined(NFAITH) && 0 < NFAITH
564: if (ip6_keepfaith) {
1.105 dyoung 565: if (rt != NULL && rt->rt_ifp != NULL &&
566: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 567: /* XXX do we need more sanity checks? */
568: ours = 1;
1.105 dyoung 569: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 570: goto hbhcheck;
571: }
572: }
573: #endif
574:
575: #if 0
576: {
577: /*
578: * Last resort: check in6_ifaddr for incoming interface.
579: * The code is here until I update the "goto ours hack" code above
580: * working right.
581: */
582: struct ifaddr *ifa;
1.113 dyoung 583: IFADDR_FOREACH(ifa, m->m_pkthdr.rcvif) {
1.9 itojun 584: if (ifa->ifa_addr == NULL)
585: continue; /* just for safety */
586: if (ifa->ifa_addr->sa_family != AF_INET6)
587: continue;
588: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
589: ours = 1;
590: deliverifp = ifa->ifa_ifp;
1.2 itojun 591: goto hbhcheck;
592: }
593: }
1.9 itojun 594: }
1.2 itojun 595: #endif
596:
597: /*
598: * Now there is no reason to process the packet if it's not our own
599: * and we're not a router.
600: */
601: if (!ip6_forwarding) {
1.116 thorpej 602: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.9 itojun 603: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 604: goto bad;
605: }
606:
607: hbhcheck:
608: /*
1.81 rpaulo 609: * record address information into m_tag, if we don't have one yet.
610: * note that we are unable to record it, if the address is not listed
611: * as our interface address (e.g. multicast addresses, addresses
612: * within FAITH prefixes and such).
613: */
1.111 dyoung 614: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 615: struct in6_ifaddr *ia6;
616:
617: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.111 dyoung 618: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
619: /*
620: * XXX maybe we should drop the packet here,
621: * as we could not provide enough information
622: * to the upper layers.
623: */
1.81 rpaulo 624: }
625: }
626:
627: /*
1.2 itojun 628: * Process Hop-by-Hop options header if it's contained.
629: * m may be modified in ip6_hopopts_input().
630: * If a JumboPayload option is included, plen will also be modified.
631: */
632: plen = (u_int32_t)ntohs(ip6->ip6_plen);
633: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 634: struct ip6_hbh *hbh;
635:
636: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
637: #if 0 /*touches NULL pointer*/
638: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
639: #endif
1.2 itojun 640: return; /* m have already been freed */
1.9 itojun 641: }
1.22 itojun 642:
1.2 itojun 643: /* adjust pointer */
644: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 645:
646: /*
1.49 itojun 647: * if the payload length field is 0 and the next header field
1.22 itojun 648: * indicates Hop-by-Hop Options header, then a Jumbo Payload
649: * option MUST be included.
650: */
651: if (ip6->ip6_plen == 0 && plen == 0) {
652: /*
653: * Note that if a valid jumbo payload option is
1.83 rpaulo 654: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 655: * (non-zero) payload length to the variable plen.
1.22 itojun 656: */
1.116 thorpej 657: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 658: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
659: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
660: icmp6_error(m, ICMP6_PARAM_PROB,
661: ICMP6_PARAMPROB_HEADER,
1.97 christos 662: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 663: return;
664: }
1.9 itojun 665: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
666: sizeof(struct ip6_hbh));
667: if (hbh == NULL) {
1.116 thorpej 668: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 669: return;
670: }
1.57 thorpej 671: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 672: nxt = hbh->ip6h_nxt;
1.2 itojun 673:
674: /*
675: * accept the packet if a router alert option is included
676: * and we act as an IPv6 router.
677: */
1.5 itojun 678: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 679: ours = 1;
680: } else
681: nxt = ip6->ip6_nxt;
682:
683: /*
684: * Check that the amount of data in the buffers
685: * is as at least much as the IPv6 header would have us expect.
686: * Trim mbufs if longer than we expect.
687: * Drop packet if shorter than we expect.
688: */
689: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 690: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 691: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 692: goto bad;
693: }
694: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
695: if (m->m_len == m->m_pkthdr.len) {
696: m->m_len = sizeof(struct ip6_hdr) + plen;
697: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
698: } else
699: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
700: }
701:
702: /*
703: * Forward if desirable.
704: */
705: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
706: /*
707: * If we are acting as a multicast router, all
708: * incoming multicast packets are passed to the
709: * kernel-level multicast forwarding function.
710: * The packet is returned (relatively) intact; if
711: * ip6_mforward() returns a non-zero value, the packet
712: * must be discarded, else it may be accepted below.
713: */
714: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
1.116 thorpej 715: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.2 itojun 716: m_freem(m);
717: return;
718: }
719: if (!ours) {
720: m_freem(m);
721: return;
722: }
1.22 itojun 723: } else if (!ours) {
1.64 itojun 724: ip6_forward(m, srcrt);
1.2 itojun 725: return;
1.56 itojun 726: }
1.25 itojun 727:
728: ip6 = mtod(m, struct ip6_hdr *);
729:
730: /*
731: * Malicious party may be able to use IPv4 mapped addr to confuse
732: * tcp/udp stack and bypass security checks (act as if it was from
733: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
734: *
735: * For SIIT end node behavior, you may want to disable the check.
736: * However, you will become vulnerable to attacks using IPv4 mapped
737: * source.
738: */
739: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
740: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 741: IP6_STATINC(IP6_STAT_BADSCOPE);
1.25 itojun 742: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
743: goto bad;
744: }
1.2 itojun 745:
746: /*
747: * Tell launch routine the next header
748: */
1.12 itojun 749: #ifdef IFA_STATS
1.28 itojun 750: if (deliverifp != NULL) {
1.9 itojun 751: struct in6_ifaddr *ia6;
752: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
753: if (ia6)
754: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
755: }
756: #endif
1.116 thorpej 757: IP6_STATINC(IP6_STAT_DELIVERED);
1.9 itojun 758: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 759: nest = 0;
1.40 itojun 760:
1.104 yamt 761: rh_present = 0;
1.2 itojun 762: while (nxt != IPPROTO_DONE) {
763: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.116 thorpej 764: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.104 yamt 765: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 766: goto bad;
767: }
1.8 itojun 768:
769: /*
770: * protection against faulty packet - there should be
771: * more sanity checks in header chain processing.
772: */
773: if (m->m_pkthdr.len < off) {
1.116 thorpej 774: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 775: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 776: goto bad;
777: }
778:
1.104 yamt 779: if (nxt == IPPROTO_ROUTING) {
780: if (rh_present++) {
781: in6_ifstat_inc(m->m_pkthdr.rcvif,
782: ifs6_in_hdrerr);
1.116 thorpej 783: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 784: goto bad;
785: }
786: }
787:
1.37 itojun 788: #ifdef IPSEC
789: /*
790: * enforce IPsec policy checking if we are seeing last header.
791: * note that we do not visit this with protocols with pcb layer
792: * code - like udp/tcp/raw ip.
793: */
794: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
795: ipsec6_in_reject(m, NULL)) {
1.117 thorpej 796: IPSEC6_STATINC(IPSEC_STAT_IN_POLVIO);
1.37 itojun 797: goto bad;
798: }
799: #endif
1.94 degroote 800: #ifdef FAST_IPSEC
801: /*
802: * enforce IPsec policy checking if we are seeing last header.
803: * note that we do not visit this with protocols with pcb layer
804: * code - like udp/tcp/raw ip.
805: */
806: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
807: /*
808: * Check if the packet has already had IPsec processing
809: * done. If so, then just pass it along. This tag gets
810: * set during AH, ESP, etc. input handling, before the
811: * packet is returned to the ip input queue for delivery.
812: */
813: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
814: s = splsoftnet();
815: if (mtag != NULL) {
816: tdbi = (struct tdb_ident *)(mtag + 1);
817: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
818: } else {
819: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
820: IP_FORWARDING, &error);
821: }
822: if (sp != NULL) {
823: /*
824: * Check security policy against packet attributes.
825: */
826: error = ipsec_in_reject(sp, m);
827: KEY_FREESP(&sp);
828: } else {
829: /* XXX error stat??? */
830: error = EINVAL;
831: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
832: }
833: splx(s);
834: if (error)
835: goto bad;
836: }
837: #endif /* FAST_IPSEC */
838:
1.56 itojun 839:
1.2 itojun 840: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
841: }
842: return;
843: bad:
844: m_freem(m);
845: }
846:
847: /*
1.81 rpaulo 848: * set/grab in6_ifaddr correspond to IPv6 destination address.
849: */
850: static struct m_tag *
1.112 dyoung 851: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 852: {
853: struct m_tag *mtag;
854:
855: mtag = ip6_addaux(m);
1.112 dyoung 856: if (mtag != NULL) {
857: struct ip6aux *ip6a;
858:
859: ip6a = (struct ip6aux *)(mtag + 1);
860: in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id);
861: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
862: ip6a->ip6a_flags = ia->ia6_flags;
863: }
1.81 rpaulo 864: return mtag; /* NULL if failed to set */
865: }
866:
1.112 dyoung 867: const struct ip6aux *
1.107 christos 868: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 869: {
870: struct m_tag *mtag;
871:
872: mtag = ip6_findaux(m);
1.112 dyoung 873: if (mtag != NULL)
874: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 875: else
876: return NULL;
877: }
878:
879: /*
1.2 itojun 880: * Hop-by-Hop options header processing. If a valid jumbo payload option is
881: * included, the real payload length will be stored in plenp.
1.107 christos 882: *
883: * rtalertp - XXX: should be stored more smart way
1.2 itojun 884: */
885: static int
1.107 christos 886: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
887: struct mbuf **mp, int *offp)
1.2 itojun 888: {
1.35 itojun 889: struct mbuf *m = *mp;
1.2 itojun 890: int off = *offp, hbhlen;
891: struct ip6_hbh *hbh;
892:
893: /* validation of the length of the header */
1.9 itojun 894: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
895: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
896: if (hbh == NULL) {
1.116 thorpej 897: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 898: return -1;
899: }
900: hbhlen = (hbh->ip6h_len + 1) << 3;
901: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
902: hbhlen);
903: if (hbh == NULL) {
1.116 thorpej 904: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 905: return -1;
906: }
1.57 thorpej 907: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 908: off += hbhlen;
909: hbhlen -= sizeof(struct ip6_hbh);
910:
911: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
912: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 913: return (-1);
1.2 itojun 914:
915: *offp = off;
916: *mp = m;
1.58 itojun 917: return (0);
1.2 itojun 918: }
919:
920: /*
921: * Search header for all Hop-by-hop options and process each option.
922: * This function is separate from ip6_hopopts_input() in order to
923: * handle a case where the sending node itself process its hop-by-hop
924: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 925: *
926: * The function assumes that hbh header is located right after the IPv6 header
927: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
928: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 929: */
930: int
1.107 christos 931: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
932: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 933: {
934: struct ip6_hdr *ip6;
935: int optlen = 0;
936: u_int8_t *opt = opthead;
937: u_int16_t rtalert_val;
1.22 itojun 938: u_int32_t jumboplen;
1.55 itojun 939: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 940:
941: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 942: switch (*opt) {
943: case IP6OPT_PAD1:
944: optlen = 1;
945: break;
946: case IP6OPT_PADN:
947: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 948: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 949: goto bad;
950: }
951: optlen = *(opt + 1) + 2;
952: break;
953: case IP6OPT_RTALERT:
954: /* XXX may need check for alignment */
955: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 956: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 957: goto bad;
958: }
959: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 960: /* XXX stat */
961: icmp6_error(m, ICMP6_PARAM_PROB,
962: ICMP6_PARAMPROB_HEADER,
963: erroff + opt + 1 - opthead);
964: return (-1);
1.35 itojun 965: }
966: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 967: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 968: *rtalertp = ntohs(rtalert_val);
969: break;
970: case IP6OPT_JUMBO:
1.22 itojun 971: /* XXX may need check for alignment */
972: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 973: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 974: goto bad;
975: }
1.35 itojun 976: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 977: /* XXX stat */
978: icmp6_error(m, ICMP6_PARAM_PROB,
979: ICMP6_PARAMPROB_HEADER,
980: erroff + opt + 1 - opthead);
981: return (-1);
1.35 itojun 982: }
1.22 itojun 983: optlen = IP6OPT_JUMBO_LEN;
984:
985: /*
986: * IPv6 packets that have non 0 payload length
1.35 itojun 987: * must not contain a jumbo payload option.
1.22 itojun 988: */
989: ip6 = mtod(m, struct ip6_hdr *);
990: if (ip6->ip6_plen) {
1.116 thorpej 991: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 992: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 993: ICMP6_PARAMPROB_HEADER,
994: erroff + opt - opthead);
995: return (-1);
1.22 itojun 996: }
1.2 itojun 997:
1.22 itojun 998: /*
999: * We may see jumbolen in unaligned location, so
1000: * we'd need to perform bcopy().
1001: */
1.126 tsutsui 1002: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 1003: jumboplen = (u_int32_t)htonl(jumboplen);
1004:
1005: #if 1
1006: /*
1007: * if there are multiple jumbo payload options,
1008: * *plenp will be non-zero and the packet will be
1009: * rejected.
1010: * the behavior may need some debate in ipngwg -
1011: * multiple options does not make sense, however,
1012: * there's no explicit mention in specification.
1013: */
1014: if (*plenp != 0) {
1.116 thorpej 1015: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 1016: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1017: ICMP6_PARAMPROB_HEADER,
1018: erroff + opt + 2 - opthead);
1019: return (-1);
1.22 itojun 1020: }
1.8 itojun 1021: #endif
1.2 itojun 1022:
1.22 itojun 1023: /*
1024: * jumbo payload length must be larger than 65535.
1025: */
1026: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 1027: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 1028: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1029: ICMP6_PARAMPROB_HEADER,
1030: erroff + opt + 2 - opthead);
1031: return (-1);
1.22 itojun 1032: }
1033: *plenp = jumboplen;
1034:
1035: break;
1.35 itojun 1036: default: /* unknown option */
1037: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 1038: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 1039: goto bad;
1040: }
1.55 itojun 1041: optlen = ip6_unknown_opt(opt, m,
1042: erroff + opt - opthead);
1043: if (optlen == -1)
1044: return (-1);
1.35 itojun 1045: optlen += 2;
1046: break;
1.2 itojun 1047: }
1048: }
1049:
1.55 itojun 1050: return (0);
1.2 itojun 1051:
1052: bad:
1053: m_freem(m);
1.55 itojun 1054: return (-1);
1.2 itojun 1055: }
1056:
1057: /*
1058: * Unknown option processing.
1059: * The third argument `off' is the offset from the IPv6 header to the option,
1060: * which is necessary if the IPv6 header the and option header and IPv6 header
1061: * is not continuous in order to return an ICMPv6 error.
1062: */
1063: int
1.107 christos 1064: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1065: {
1066: struct ip6_hdr *ip6;
1067:
1.35 itojun 1068: switch (IP6OPT_TYPE(*optp)) {
1069: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1070: return ((int)*(optp + 1));
1.35 itojun 1071: case IP6OPT_TYPE_DISCARD: /* silently discard */
1072: m_freem(m);
1.58 itojun 1073: return (-1);
1.35 itojun 1074: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 1075: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1076: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1077: return (-1);
1.35 itojun 1078: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 1079: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1080: ip6 = mtod(m, struct ip6_hdr *);
1081: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1082: (m->m_flags & (M_BCAST|M_MCAST)))
1083: m_freem(m);
1084: else
1085: icmp6_error(m, ICMP6_PARAM_PROB,
1086: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1087: return (-1);
1.2 itojun 1088: }
1089:
1090: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1091: return (-1);
1.2 itojun 1092: }
1093:
1094: /*
1.9 itojun 1095: * Create the "control" list for this pcb.
1096: *
1097: * The routine will be called from upper layer handlers like tcp6_input().
1098: * Thus the routine assumes that the caller (tcp6_input) have already
1099: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1100: * very first mbuf on the mbuf chain.
1101: * We may want to add some infinite loop prevention or sanity checks for safety.
1102: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1103: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1104: */
1105: void
1.107 christos 1106: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1107: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1108: {
1.85 rpaulo 1109: #ifdef RFC2292
1110: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1111: #else
1112: #define IS2292(x, y) (y)
1113: #endif
1114:
1.123 christos 1115: if (in6p->in6p_socket->so_options & SO_TIMESTAMP
1116: #ifdef SO_OTIMESTAMP
1117: || in6p->in6p_socket->so_options & SO_OTIMESTAMP
1118: #endif
1119: ) {
1.2 itojun 1120: struct timeval tv;
1121:
1122: microtime(&tv);
1.123 christos 1123: #ifdef SO_OTIMESTAMP
1124: if (in6p->in6p_socket->so_options & SO_OTIMESTAMP) {
1125: struct timeval50 tv50;
1126: timeval_to_timeval50(&tv, &tv50);
1127: *mp = sbcreatecontrol((void *) &tv50, sizeof(tv50),
1128: SCM_OTIMESTAMP, SOL_SOCKET);
1129: } else
1130: #endif
1.97 christos 1131: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1132: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1133: if (*mp)
1134: mp = &(*mp)->m_next;
1135: }
1.87 rpaulo 1136:
1137: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1138: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1139: return;
1140:
1.2 itojun 1141: /* RFC 2292 sec. 5 */
1.35 itojun 1142: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1143: struct in6_pktinfo pi6;
1.85 rpaulo 1144:
1.126 tsutsui 1145: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1146: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1147: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1148: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1149: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1150: sizeof(struct in6_pktinfo),
1151: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1152: if (*mp)
1153: mp = &(*mp)->m_next;
1154: }
1.85 rpaulo 1155:
1.2 itojun 1156: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1157: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1158:
1.97 christos 1159: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1160: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1161: if (*mp)
1162: mp = &(*mp)->m_next;
1163: }
1164:
1165: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1166: u_int32_t flowinfo;
1167: int tclass;
1168:
1169: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1170: flowinfo >>= 20;
1171:
1172: tclass = flowinfo & 0xff;
1.97 christos 1173: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1174: IPV6_TCLASS, IPPROTO_IPV6);
1175:
1.2 itojun 1176: if (*mp)
1177: mp = &(*mp)->m_next;
1178: }
1179:
1180: /*
1.75 itojun 1181: * IPV6_HOPOPTS socket option. Recall that we required super-user
1182: * privilege for the option (see ip6_ctloutput), but it might be too
1183: * strict, since there might be some hop-by-hop options which can be
1184: * returned to normal user.
1.85 rpaulo 1185: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1186: */
1.75 itojun 1187: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1188: /*
1189: * Check if a hop-by-hop options header is contatined in the
1190: * received packet, and if so, store the options as ancillary
1191: * data. Note that a hop-by-hop options header must be
1192: * just after the IPv6 header, which fact is assured through
1193: * the IPv6 input processing.
1194: */
1.78 christos 1195: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1196: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1197: struct ip6_hbh *hbh;
1198: int hbhlen;
1.62 itojun 1199: struct mbuf *ext;
1.9 itojun 1200:
1.62 itojun 1201: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1202: xip6->ip6_nxt);
1.62 itojun 1203: if (ext == NULL) {
1.116 thorpej 1204: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1205: return;
1206: }
1.62 itojun 1207: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1208: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1209: if (hbhlen != ext->m_len) {
1210: m_freem(ext);
1.116 thorpej 1211: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1212: return;
1213: }
1.2 itojun 1214:
1215: /*
1216: * XXX: We copy whole the header even if a jumbo
1217: * payload option is included, which option is to
1218: * be removed before returning in the RFC 2292.
1.85 rpaulo 1219: * Note: this constraint is removed in RFC3542.
1.2 itojun 1220: */
1.97 christos 1221: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1222: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1223: IPPROTO_IPV6);
1.2 itojun 1224: if (*mp)
1225: mp = &(*mp)->m_next;
1.62 itojun 1226: m_freem(ext);
1.2 itojun 1227: }
1228: }
1229:
1230: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1231: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1232: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1233: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1234:
1235: /*
1236: * Search for destination options headers or routing
1237: * header(s) through the header chain, and stores each
1238: * header as ancillary data.
1239: * Note that the order of the headers remains in
1240: * the chain of ancillary data.
1241: */
1.86 rpaulo 1242: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1243: struct ip6_ext *ip6e = NULL;
1.9 itojun 1244: int elen;
1.62 itojun 1245: struct mbuf *ext = NULL;
1.9 itojun 1246:
1.62 itojun 1247: /*
1248: * if it is not an extension header, don't try to
1249: * pull it from the chain.
1250: */
1251: switch (nxt) {
1252: case IPPROTO_DSTOPTS:
1253: case IPPROTO_ROUTING:
1254: case IPPROTO_HOPOPTS:
1255: case IPPROTO_AH: /* is it possible? */
1256: break;
1257: default:
1258: goto loopend;
1259: }
1260:
1261: ext = ip6_pullexthdr(m, off, nxt);
1262: if (ext == NULL) {
1.116 thorpej 1263: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1264: return;
1265: }
1.62 itojun 1266: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1267: if (nxt == IPPROTO_AH)
1268: elen = (ip6e->ip6e_len + 2) << 2;
1269: else
1270: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1271: if (elen != ext->m_len) {
1272: m_freem(ext);
1.116 thorpej 1273: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1274: return;
1275: }
1.57 thorpej 1276: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1277:
1.35 itojun 1278: switch (nxt) {
1.62 itojun 1279: case IPPROTO_DSTOPTS:
1.127 martin 1280: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1281: break;
1282:
1.97 christos 1283: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1284: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1285: IPPROTO_IPV6);
1.35 itojun 1286: if (*mp)
1287: mp = &(*mp)->m_next;
1288: break;
1289:
1290: case IPPROTO_ROUTING:
1.127 martin 1291: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1292: break;
1293:
1.97 christos 1294: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1295: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1296: IPPROTO_IPV6);
1.35 itojun 1297: if (*mp)
1298: mp = &(*mp)->m_next;
1299: break;
1300:
1.62 itojun 1301: case IPPROTO_HOPOPTS:
1302: case IPPROTO_AH: /* is it possible? */
1303: break;
1304:
1.35 itojun 1305: default:
1306: /*
1.62 itojun 1307: * other cases have been filtered in the above.
1308: * none will visit this case. here we supply
1309: * the code just in case (nxt overwritten or
1310: * other cases).
1.35 itojun 1311: */
1.62 itojun 1312: m_freem(ext);
1.35 itojun 1313: goto loopend;
1314:
1.2 itojun 1315: }
1316:
1317: /* proceed with the next header. */
1.9 itojun 1318: off += elen;
1.2 itojun 1319: nxt = ip6e->ip6e_nxt;
1.62 itojun 1320: ip6e = NULL;
1321: m_freem(ext);
1322: ext = NULL;
1.2 itojun 1323: }
1324: loopend:
1.62 itojun 1325: ;
1.2 itojun 1326: }
1.62 itojun 1327: }
1.85 rpaulo 1328: #undef IS2292
1329:
1330:
1331: void
1.95 dyoung 1332: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1333: uint32_t *mtu)
1.85 rpaulo 1334: {
1335: struct socket *so;
1336: struct mbuf *m_mtu;
1337: struct ip6_mtuinfo mtuctl;
1338:
1339: so = in6p->in6p_socket;
1340:
1341: if (mtu == NULL)
1342: return;
1343:
1344: #ifdef DIAGNOSTIC
1345: if (so == NULL) /* I believe this is impossible */
1346: panic("ip6_notify_pmtu: socket is NULL");
1347: #endif
1348:
1349: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1350: mtuctl.ip6m_mtu = *mtu;
1351: mtuctl.ip6m_addr = *dst;
1352: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1353: return;
1354:
1.97 christos 1355: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1356: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1357: return;
1358:
1.95 dyoung 1359: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1360: == 0) {
1361: m_freem(m_mtu);
1362: /* XXX: should count statistics */
1363: } else
1364: sorwakeup(so);
1365:
1366: return;
1367: }
1.62 itojun 1368:
1369: /*
1370: * pull single extension header from mbuf chain. returns single mbuf that
1371: * contains the result, or NULL on error.
1372: */
1373: static struct mbuf *
1.107 christos 1374: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1375: {
1376: struct ip6_ext ip6e;
1377: size_t elen;
1378: struct mbuf *n;
1379:
1380: #ifdef DIAGNOSTIC
1381: switch (nxt) {
1382: case IPPROTO_DSTOPTS:
1383: case IPPROTO_ROUTING:
1384: case IPPROTO_HOPOPTS:
1385: case IPPROTO_AH: /* is it possible? */
1386: break;
1387: default:
1388: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1389: }
1.62 itojun 1390: #endif
1.2 itojun 1391:
1.97 christos 1392: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1393: if (nxt == IPPROTO_AH)
1394: elen = (ip6e.ip6e_len + 2) << 2;
1395: else
1396: elen = (ip6e.ip6e_len + 1) << 3;
1397:
1398: MGET(n, M_DONTWAIT, MT_DATA);
1399: if (n && elen >= MLEN) {
1400: MCLGET(n, M_DONTWAIT);
1401: if ((n->m_flags & M_EXT) == 0) {
1402: m_free(n);
1403: n = NULL;
1404: }
1405: }
1406: if (!n)
1407: return NULL;
1408:
1409: n->m_len = 0;
1410: if (elen >= M_TRAILINGSPACE(n)) {
1411: m_free(n);
1412: return NULL;
1413: }
1414:
1.97 christos 1415: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1416: n->m_len = elen;
1417: return n;
1.2 itojun 1418: }
1419:
1420: /*
1421: * Get pointer to the previous header followed by the header
1422: * currently processed.
1423: * XXX: This function supposes that
1424: * M includes all headers,
1425: * the next header field and the header length field of each header
1426: * are valid, and
1427: * the sum of each header length equals to OFF.
1428: * Because of these assumptions, this function must be called very
1429: * carefully. Moreover, it will not be used in the near future when
1430: * we develop `neater' mechanism to process extension headers.
1431: */
1.58 itojun 1432: u_int8_t *
1.107 christos 1433: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1434: {
1435: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1436:
1437: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1438: return (&ip6->ip6_nxt);
1.2 itojun 1439: else {
1440: int len, nxt;
1441: struct ip6_ext *ip6e = NULL;
1442:
1443: nxt = ip6->ip6_nxt;
1444: len = sizeof(struct ip6_hdr);
1445: while (len < off) {
1.97 christos 1446: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1447:
1.35 itojun 1448: switch (nxt) {
1.2 itojun 1449: case IPPROTO_FRAGMENT:
1450: len += sizeof(struct ip6_frag);
1451: break;
1452: case IPPROTO_AH:
1453: len += (ip6e->ip6e_len + 2) << 2;
1454: break;
1455: default:
1456: len += (ip6e->ip6e_len + 1) << 3;
1457: break;
1458: }
1459: nxt = ip6e->ip6e_nxt;
1460: }
1461: if (ip6e)
1.58 itojun 1462: return (&ip6e->ip6e_nxt);
1.2 itojun 1463: else
1464: return NULL;
1.18 itojun 1465: }
1466: }
1467:
1468: /*
1469: * get next header offset. m will be retained.
1470: */
1471: int
1.107 christos 1472: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1473: {
1474: struct ip6_hdr ip6;
1475: struct ip6_ext ip6e;
1476: struct ip6_frag fh;
1477:
1478: /* just in case */
1479: if (m == NULL)
1480: panic("ip6_nexthdr: m == NULL");
1481: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1482: return -1;
1483:
1484: switch (proto) {
1485: case IPPROTO_IPV6:
1.83 rpaulo 1486: /* do not chase beyond intermediate IPv6 headers */
1487: if (off != 0)
1488: return -1;
1.18 itojun 1489: if (m->m_pkthdr.len < off + sizeof(ip6))
1490: return -1;
1.97 christos 1491: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1492: if (nxtp)
1493: *nxtp = ip6.ip6_nxt;
1494: off += sizeof(ip6);
1495: return off;
1496:
1497: case IPPROTO_FRAGMENT:
1498: /*
1499: * terminate parsing if it is not the first fragment,
1500: * it does not make sense to parse through it.
1501: */
1502: if (m->m_pkthdr.len < off + sizeof(fh))
1503: return -1;
1.97 christos 1504: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1505: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1506: return -1;
1507: if (nxtp)
1508: *nxtp = fh.ip6f_nxt;
1509: off += sizeof(struct ip6_frag);
1510: return off;
1511:
1512: case IPPROTO_AH:
1513: if (m->m_pkthdr.len < off + sizeof(ip6e))
1514: return -1;
1.97 christos 1515: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1516: if (nxtp)
1517: *nxtp = ip6e.ip6e_nxt;
1518: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1519: if (m->m_pkthdr.len < off)
1520: return -1;
1.18 itojun 1521: return off;
1522:
1523: case IPPROTO_HOPOPTS:
1524: case IPPROTO_ROUTING:
1525: case IPPROTO_DSTOPTS:
1526: if (m->m_pkthdr.len < off + sizeof(ip6e))
1527: return -1;
1.97 christos 1528: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1529: if (nxtp)
1530: *nxtp = ip6e.ip6e_nxt;
1531: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1532: if (m->m_pkthdr.len < off)
1533: return -1;
1.18 itojun 1534: return off;
1535:
1536: case IPPROTO_NONE:
1537: case IPPROTO_ESP:
1538: case IPPROTO_IPCOMP:
1539: /* give up */
1540: return -1;
1541:
1542: default:
1543: return -1;
1544: }
1545: }
1546:
1547: /*
1548: * get offset for the last header in the chain. m will be kept untainted.
1549: */
1550: int
1.107 christos 1551: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1552: {
1553: int newoff;
1554: int nxt;
1555:
1556: if (!nxtp) {
1557: nxt = -1;
1558: nxtp = &nxt;
1559: }
1.86 rpaulo 1560: for (;;) {
1.18 itojun 1561: newoff = ip6_nexthdr(m, off, proto, nxtp);
1562: if (newoff < 0)
1563: return off;
1564: else if (newoff < off)
1565: return -1; /* invalid */
1566: else if (newoff == off)
1567: return newoff;
1568:
1569: off = newoff;
1570: proto = *nxtp;
1.2 itojun 1571: }
1572: }
1573:
1.81 rpaulo 1574: struct m_tag *
1.107 christos 1575: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1576: {
1577: struct m_tag *mtag;
1578:
1579: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1580: if (!mtag) {
1581: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1582: M_NOWAIT);
1583: if (mtag) {
1584: m_tag_prepend(m, mtag);
1.124 cegger 1585: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1586: }
1587: }
1588: return mtag;
1589: }
1590:
1591: struct m_tag *
1.107 christos 1592: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1593: {
1594: struct m_tag *mtag;
1595:
1596: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1597: return mtag;
1598: }
1599:
1600: void
1.107 christos 1601: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1602: {
1603: struct m_tag *mtag;
1604:
1605: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1606: if (mtag)
1607: m_tag_delete(m, mtag);
1608: }
1609:
1.98 liamjfoy 1610: #ifdef GATEWAY
1611: /*
1612: * sysctl helper routine for net.inet.ip6.maxflows. Since
1613: * we could reduce this value, call ip6flow_reap();
1614: */
1615: static int
1.101 liamjfoy 1616: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1617: {
1.121 simonb 1618: int error;
1.98 liamjfoy 1619:
1.121 simonb 1620: error = sysctl_lookup(SYSCTLFN_CALL(rnode));
1621: if (error || newp == NULL)
1622: return (error);
1.98 liamjfoy 1623:
1.121 simonb 1624: mutex_enter(softnet_lock);
1.122 matt 1625: KERNEL_LOCK(1, NULL);
1.120 matt 1626:
1.121 simonb 1627: ip6flow_reap(0);
1.120 matt 1628:
1629: KERNEL_UNLOCK_ONE(NULL);
1.121 simonb 1630: mutex_exit(softnet_lock);
1.98 liamjfoy 1631:
1.121 simonb 1632: return (0);
1.98 liamjfoy 1633: }
1.99 liamjfoy 1634:
1635: static int
1636: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1637: {
1638: int error, tmp;
1639: struct sysctlnode node;
1640:
1641: node = *rnode;
1642: tmp = ip6_hashsize;
1643: node.sysctl_data = &tmp;
1644: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1645: if (error || newp == NULL)
1646: return (error);
1647:
1648: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1649: /*
1650: * Can only fail due to malloc()
1651: */
1.120 matt 1652: mutex_enter(softnet_lock);
1.122 matt 1653: KERNEL_LOCK(1, NULL);
1.120 matt 1654:
1655: error = ip6flow_invalidate_all(tmp);
1656:
1657: KERNEL_UNLOCK_ONE(NULL);
1658: mutex_exit(softnet_lock);
1.99 liamjfoy 1659: } else {
1660: /*
1661: * EINVAL if not a power of 2
1.121 simonb 1662: */
1.120 matt 1663: error = EINVAL;
1.99 liamjfoy 1664: }
1665:
1.120 matt 1666: return error;
1.99 liamjfoy 1667: }
1.98 liamjfoy 1668: #endif /* GATEWAY */
1669:
1.2 itojun 1670: /*
1671: * System control for IP6
1672: */
1673:
1.120 matt 1674: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1675: 0, 0, 0, 0,
1676: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1677: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1678: EMSGSIZE, EHOSTUNREACH, 0, 0,
1679: 0, 0, 0, 0,
1680: ENOPROTOOPT
1681: };
1682:
1.116 thorpej 1683: static int
1684: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1685: {
1686:
1.119 thorpej 1687: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1688: }
1689:
1.128 pooka 1690: static void
1691: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1692: {
1.85 rpaulo 1693: #ifdef RFC2292
1694: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1695: #else
1696: #define IS2292(x, y) (y)
1697: #endif
1.26 itojun 1698:
1.73 atatat 1699: sysctl_createv(clog, 0, NULL, NULL,
1700: CTLFLAG_PERMANENT,
1.70 atatat 1701: CTLTYPE_NODE, "net", NULL,
1702: NULL, 0, NULL, 0,
1703: CTL_NET, CTL_EOL);
1.73 atatat 1704: sysctl_createv(clog, 0, NULL, NULL,
1705: CTLFLAG_PERMANENT,
1.74 atatat 1706: CTLTYPE_NODE, "inet6",
1707: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1708: NULL, 0, NULL, 0,
1709: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1710: sysctl_createv(clog, 0, NULL, NULL,
1711: CTLFLAG_PERMANENT,
1.74 atatat 1712: CTLTYPE_NODE, "ip6",
1713: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1714: NULL, 0, NULL, 0,
1715: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1716:
1.73 atatat 1717: sysctl_createv(clog, 0, NULL, NULL,
1718: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1719: CTLTYPE_INT, "forwarding",
1720: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1721: NULL, 0, &ip6_forwarding, 0,
1722: CTL_NET, PF_INET6, IPPROTO_IPV6,
1723: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1724: sysctl_createv(clog, 0, NULL, NULL,
1725: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1726: CTLTYPE_INT, "redirect",
1727: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1728: NULL, 0, &ip6_sendredirects, 0,
1729: CTL_NET, PF_INET6, IPPROTO_IPV6,
1730: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1731: sysctl_createv(clog, 0, NULL, NULL,
1732: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1733: CTLTYPE_INT, "hlim",
1734: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1735: NULL, 0, &ip6_defhlim, 0,
1736: CTL_NET, PF_INET6, IPPROTO_IPV6,
1737: IPV6CTL_DEFHLIM, CTL_EOL);
1738: #ifdef notyet
1.73 atatat 1739: sysctl_createv(clog, 0, NULL, NULL,
1740: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1741: CTLTYPE_INT, "mtu", NULL,
1742: NULL, 0, &, 0,
1743: CTL_NET, PF_INET6, IPPROTO_IPV6,
1744: IPV6CTL_DEFMTU, CTL_EOL);
1745: #endif
1746: #ifdef __no_idea__
1.73 atatat 1747: sysctl_createv(clog, 0, NULL, NULL,
1748: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1749: CTLTYPE_INT, "forwsrcrt", NULL,
1750: NULL, 0, &?, 0,
1751: CTL_NET, PF_INET6, IPPROTO_IPV6,
1752: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1753: sysctl_createv(clog, 0, NULL, NULL,
1754: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1755: CTLTYPE_STRUCT, "mrtstats", NULL,
1756: NULL, 0, &?, sizeof(?),
1757: CTL_NET, PF_INET6, IPPROTO_IPV6,
1758: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1759: sysctl_createv(clog, 0, NULL, NULL,
1760: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1761: CTLTYPE_?, "mrtproto", NULL,
1762: NULL, 0, &?, sizeof(?),
1763: CTL_NET, PF_INET6, IPPROTO_IPV6,
1764: IPV6CTL_MRTPROTO, CTL_EOL);
1765: #endif
1.73 atatat 1766: sysctl_createv(clog, 0, NULL, NULL,
1767: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1768: CTLTYPE_INT, "maxfragpackets",
1769: SYSCTL_DESCR("Maximum number of fragments to buffer "
1770: "for reassembly"),
1.70 atatat 1771: NULL, 0, &ip6_maxfragpackets, 0,
1772: CTL_NET, PF_INET6, IPPROTO_IPV6,
1773: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1774: #ifdef __no_idea__
1.73 atatat 1775: sysctl_createv(clog, 0, NULL, NULL,
1776: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1777: CTLTYPE_INT, "sourcecheck", NULL,
1778: NULL, 0, &?, 0,
1779: CTL_NET, PF_INET6, IPPROTO_IPV6,
1780: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1781: sysctl_createv(clog, 0, NULL, NULL,
1782: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1783: CTLTYPE_INT, "sourcecheck_logint", NULL,
1784: NULL, 0, &?, 0,
1785: CTL_NET, PF_INET6, IPPROTO_IPV6,
1786: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1787: #endif
1.73 atatat 1788: sysctl_createv(clog, 0, NULL, NULL,
1789: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1790: CTLTYPE_INT, "accept_rtadv",
1791: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1792: NULL, 0, &ip6_accept_rtadv, 0,
1793: CTL_NET, PF_INET6, IPPROTO_IPV6,
1794: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1795: sysctl_createv(clog, 0, NULL, NULL,
1796: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1797: CTLTYPE_INT, "rtadv_maxroutes",
1798: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1799: NULL, 0, &ip6_rtadv_maxroutes, 0,
1800: CTL_NET, PF_INET6, IPPROTO_IPV6,
1801: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1802: sysctl_createv(clog, 0, NULL, NULL,
1803: CTLFLAG_PERMANENT,
1804: CTLTYPE_INT, "rtadv_numroutes",
1805: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1806: NULL, 0, &nd6_numroutes, 0,
1807: CTL_NET, PF_INET6, IPPROTO_IPV6,
1808: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1809: sysctl_createv(clog, 0, NULL, NULL,
1810: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1811: CTLTYPE_INT, "keepfaith",
1812: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1813: NULL, 0, &ip6_keepfaith, 0,
1814: CTL_NET, PF_INET6, IPPROTO_IPV6,
1815: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1816: sysctl_createv(clog, 0, NULL, NULL,
1817: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1818: CTLTYPE_INT, "log_interval",
1819: SYSCTL_DESCR("Minumum interval between logging "
1820: "unroutable packets"),
1.70 atatat 1821: NULL, 0, &ip6_log_interval, 0,
1822: CTL_NET, PF_INET6, IPPROTO_IPV6,
1823: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1824: sysctl_createv(clog, 0, NULL, NULL,
1825: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1826: CTLTYPE_INT, "hdrnestlimit",
1827: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1828: NULL, 0, &ip6_hdrnestlimit, 0,
1829: CTL_NET, PF_INET6, IPPROTO_IPV6,
1830: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1831: sysctl_createv(clog, 0, NULL, NULL,
1832: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1833: CTLTYPE_INT, "dad_count",
1834: SYSCTL_DESCR("Number of Duplicate Address Detection "
1835: "probes to send"),
1.70 atatat 1836: NULL, 0, &ip6_dad_count, 0,
1837: CTL_NET, PF_INET6, IPPROTO_IPV6,
1838: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1839: sysctl_createv(clog, 0, NULL, NULL,
1840: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1841: CTLTYPE_INT, "auto_flowlabel",
1842: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1843: NULL, 0, &ip6_auto_flowlabel, 0,
1844: CTL_NET, PF_INET6, IPPROTO_IPV6,
1845: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1846: sysctl_createv(clog, 0, NULL, NULL,
1847: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1848: CTLTYPE_INT, "defmcasthlim",
1849: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1850: NULL, 0, &ip6_defmcasthlim, 0,
1851: CTL_NET, PF_INET6, IPPROTO_IPV6,
1852: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1853: #if NGIF > 0
1.73 atatat 1854: sysctl_createv(clog, 0, NULL, NULL,
1855: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1856: CTLTYPE_INT, "gifhlim",
1857: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1858: NULL, 0, &ip6_gif_hlim, 0,
1859: CTL_NET, PF_INET6, IPPROTO_IPV6,
1860: IPV6CTL_GIF_HLIM, CTL_EOL);
1861: #endif /* NGIF */
1.73 atatat 1862: sysctl_createv(clog, 0, NULL, NULL,
1863: CTLFLAG_PERMANENT,
1.74 atatat 1864: CTLTYPE_STRING, "kame_version",
1865: SYSCTL_DESCR("KAME Version"),
1.78 christos 1866: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1867: CTL_NET, PF_INET6, IPPROTO_IPV6,
1868: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1869: sysctl_createv(clog, 0, NULL, NULL,
1870: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1871: CTLTYPE_INT, "use_deprecated",
1872: SYSCTL_DESCR("Allow use of deprecated addresses as "
1873: "source addresses"),
1.70 atatat 1874: NULL, 0, &ip6_use_deprecated, 0,
1875: CTL_NET, PF_INET6, IPPROTO_IPV6,
1876: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1877: sysctl_createv(clog, 0, NULL, NULL,
1878: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1879: CTLTYPE_INT, "rr_prune", NULL,
1880: NULL, 0, &ip6_rr_prune, 0,
1881: CTL_NET, PF_INET6, IPPROTO_IPV6,
1882: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1883: sysctl_createv(clog, 0, NULL, NULL,
1884: CTLFLAG_PERMANENT
1.70 atatat 1885: #ifndef INET6_BINDV6ONLY
1.73 atatat 1886: |CTLFLAG_READWRITE,
1.70 atatat 1887: #endif
1.74 atatat 1888: CTLTYPE_INT, "v6only",
1889: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1890: "to PF_INET sockets"),
1.70 atatat 1891: NULL, 0, &ip6_v6only, 0,
1892: CTL_NET, PF_INET6, IPPROTO_IPV6,
1893: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1894: sysctl_createv(clog, 0, NULL, NULL,
1895: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1896: CTLTYPE_INT, "anonportmin",
1897: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1898: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1899: CTL_NET, PF_INET6, IPPROTO_IPV6,
1900: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1901: sysctl_createv(clog, 0, NULL, NULL,
1902: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1903: CTLTYPE_INT, "anonportmax",
1904: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1905: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1906: CTL_NET, PF_INET6, IPPROTO_IPV6,
1907: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1908: #ifndef IPNOPRIVPORTS
1.73 atatat 1909: sysctl_createv(clog, 0, NULL, NULL,
1910: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1911: CTLTYPE_INT, "lowportmin",
1912: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1913: "to assign"),
1.70 atatat 1914: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1915: CTL_NET, PF_INET6, IPPROTO_IPV6,
1916: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1917: sysctl_createv(clog, 0, NULL, NULL,
1918: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1919: CTLTYPE_INT, "lowportmax",
1920: SYSCTL_DESCR("Highest privileged ephemeral port number "
1921: "to assign"),
1.70 atatat 1922: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1923: CTL_NET, PF_INET6, IPPROTO_IPV6,
1924: IPV6CTL_LOWPORTMAX, CTL_EOL);
1925: #endif /* IPNOPRIVPORTS */
1.73 atatat 1926: sysctl_createv(clog, 0, NULL, NULL,
1927: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1928: CTLTYPE_INT, "use_tempaddr",
1929: SYSCTL_DESCR("Use temporary address"),
1930: NULL, 0, &ip6_use_tempaddr, 0,
1931: CTL_NET, PF_INET6, IPPROTO_IPV6,
1932: CTL_CREATE, CTL_EOL);
1933: sysctl_createv(clog, 0, NULL, NULL,
1934: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1935: CTLTYPE_INT, "temppltime",
1936: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1937: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1938: CTL_NET, PF_INET6, IPPROTO_IPV6,
1939: CTL_CREATE, CTL_EOL);
1940: sysctl_createv(clog, 0, NULL, NULL,
1941: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1942: CTLTYPE_INT, "tempvltime",
1943: SYSCTL_DESCR("valid lifetime of a temporary address"),
1944: NULL, 0, &ip6_temp_valid_lifetime, 0,
1945: CTL_NET, PF_INET6, IPPROTO_IPV6,
1946: CTL_CREATE, CTL_EOL);
1947: sysctl_createv(clog, 0, NULL, NULL,
1948: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1949: CTLTYPE_INT, "maxfrags",
1950: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1951: NULL, 0, &ip6_maxfrags, 0,
1952: CTL_NET, PF_INET6, IPPROTO_IPV6,
1953: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1954: sysctl_createv(clog, 0, NULL, NULL,
1955: CTLFLAG_PERMANENT,
1956: CTLTYPE_STRUCT, "stats",
1957: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1958: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1959: CTL_NET, PF_INET6, IPPROTO_IPV6,
1960: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1961: sysctl_createv(clog, 0, NULL, NULL,
1962: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1963: CTLTYPE_INT, "use_defaultzone",
1964: SYSCTL_DESCR("Whether to use the default scope zones"),
1965: NULL, 0, &ip6_use_defzone, 0,
1966: CTL_NET, PF_INET6, IPPROTO_IPV6,
1967: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1968: sysctl_createv(clog, 0, NULL, NULL,
1969: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1970: CTLTYPE_INT, "mcast_pmtu",
1971: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1972: NULL, 0, &ip6_mcast_pmtu, 0,
1973: CTL_NET, PF_INET6, IPPROTO_IPV6,
1974: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1975: #ifdef GATEWAY
1976: sysctl_createv(clog, 0, NULL, NULL,
1977: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1978: CTLTYPE_INT, "maxflows",
1979: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.101 liamjfoy 1980: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1981: CTL_NET, PF_INET6, IPPROTO_IPV6,
1982: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1983: sysctl_createv(clog, 0, NULL, NULL,
1984: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1985: CTLTYPE_INT, "hashsize",
1986: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1987: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1988: CTL_NET, PF_INET6, IPPROTO_IPV6,
1989: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1990: #endif
1.2 itojun 1991: }
1.116 thorpej 1992:
1993: void
1994: ip6_statinc(u_int stat)
1995: {
1996:
1997: KASSERT(stat < IP6_NSTATS);
1998: IP6_STATINC(stat);
1999: }
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