Annotation of src/sys/netinet6/ip6_input.c, Revision 1.188
1.188 ! maxv 1: /* $NetBSD: ip6_input.c,v 1.187 2018/01/30 14:49:25 maxv 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>
1.188 ! maxv 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.187 2018/01/30 14:49:25 maxv Exp $");
1.2 itojun 66:
1.152 pooka 67: #ifdef _KERNEL_OPT
1.129 joerg 68: #include "opt_gateway.h"
1.2 itojun 69: #include "opt_inet.h"
1.85 rpaulo 70: #include "opt_inet6.h"
1.4 thorpej 71: #include "opt_ipsec.h"
1.169 ozaki-r 72: #include "opt_net_mpsafe.h"
1.152 pooka 73: #endif
1.2 itojun 74:
75: #include <sys/param.h>
76: #include <sys/systm.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>
1.167 ozaki-r 89: #include <sys/percpu.h>
1.2 itojun 90:
91: #include <net/if.h>
92: #include <net/if_types.h>
93: #include <net/if_dl.h>
94: #include <net/route.h>
1.148 rmind 95: #include <net/pktqueue.h>
1.15 darrenr 96: #include <net/pfil.h>
1.2 itojun 97:
98: #include <netinet/in.h>
1.9 itojun 99: #include <netinet/in_systm.h>
100: #ifdef INET
101: #include <netinet/ip.h>
1.148 rmind 102: #include <netinet/ip_var.h>
1.9 itojun 103: #include <netinet/ip_icmp.h>
1.45 itojun 104: #endif /* INET */
1.14 itojun 105: #include <netinet/ip6.h>
1.140 christos 106: #include <netinet/portalgo.h>
1.2 itojun 107: #include <netinet6/in6_var.h>
1.11 itojun 108: #include <netinet6/ip6_var.h>
1.116 thorpej 109: #include <netinet6/ip6_private.h>
1.2 itojun 110: #include <netinet6/in6_pcb.h>
1.14 itojun 111: #include <netinet/icmp6.h>
1.81 rpaulo 112: #include <netinet6/scope6_var.h>
1.2 itojun 113: #include <netinet6/in6_ifattach.h>
114: #include <netinet6/nd6.h>
115:
1.142 christos 116: #ifdef IPSEC
1.94 degroote 117: #include <netipsec/ipsec.h>
118: #include <netipsec/ipsec6.h>
119: #include <netipsec/key.h>
1.142 christos 120: #endif /* IPSEC */
1.94 degroote 121:
1.2 itojun 122: #include <netinet6/ip6protosw.h>
123:
124: #include "faith.h"
125:
1.9 itojun 126: #include <net/net_osdep.h>
127:
1.2 itojun 128: extern struct domain inet6domain;
129:
130: u_char ip6_protox[IPPROTO_MAX];
1.148 rmind 131: pktqueue_t *ip6_pktq __read_mostly;
1.2 itojun 132:
1.143 rmind 133: pfil_head_t *inet6_pfil_hook;
1.29 thorpej 134:
1.116 thorpej 135: percpu_t *ip6stat_percpu;
1.2 itojun 136:
1.167 ozaki-r 137: percpu_t *ip6_forward_rt_percpu __cacheline_aligned;
138:
1.156 ozaki-r 139: static void ip6_init2(void);
1.148 rmind 140: static void ip6intr(void *);
1.112 dyoung 141: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 142:
1.136 drochner 143: static int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
144: u_int32_t *);
1.111 dyoung 145: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.128 pooka 146: static void sysctl_net_inet6_ip6_setup(struct sysctllog **);
1.2 itojun 147:
1.169 ozaki-r 148: #ifdef NET_MPSAFE
149: #define SOFTNET_LOCK() mutex_enter(softnet_lock)
150: #define SOFTNET_UNLOCK() mutex_exit(softnet_lock)
151: #else
152: #define SOFTNET_LOCK() KASSERT(mutex_owned(softnet_lock))
153: #define SOFTNET_UNLOCK() KASSERT(mutex_owned(softnet_lock))
154: #endif
155:
1.2 itojun 156: /*
157: * IP6 initialization: fill in IP6 protocol switch table.
158: * All protocols not implemented in kernel go to raw IP6 protocol handler.
159: */
160: void
1.114 matt 161: ip6_init(void)
1.2 itojun 162: {
1.78 christos 163: const struct ip6protosw *pr;
1.35 itojun 164: int i;
1.2 itojun 165:
1.163 ozaki-r 166: in6_init();
1.162 ozaki-r 167:
1.128 pooka 168: sysctl_net_inet6_ip6_setup(NULL);
1.78 christos 169: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 170: if (pr == 0)
171: panic("ip6_init");
172: for (i = 0; i < IPPROTO_MAX; i++)
173: ip6_protox[i] = pr - inet6sw;
1.78 christos 174: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
175: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 176: if (pr->pr_domain->dom_family == PF_INET6 &&
177: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
178: ip6_protox[pr->pr_protocol] = pr - inet6sw;
1.148 rmind 179:
1.149 ozaki-r 180: ip6_pktq = pktq_create(IFQ_MAXLEN, ip6intr, NULL);
1.148 rmind 181: KASSERT(ip6_pktq != NULL);
182:
1.81 rpaulo 183: scope6_init();
184: addrsel_policy_init();
1.2 itojun 185: nd6_init();
186: frag6_init();
1.133 tls 187: ip6_desync_factor = cprng_fast32() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 188:
1.156 ozaki-r 189: ip6_init2();
1.98 liamjfoy 190: #ifdef GATEWAY
1.99 liamjfoy 191: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 192: #endif
1.29 thorpej 193: /* Register our Packet Filter hook. */
1.143 rmind 194: inet6_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET6);
195: KASSERT(inet6_pfil_hook != NULL);
1.116 thorpej 196:
197: ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS);
1.167 ozaki-r 198: ip6_forward_rt_percpu = percpu_alloc(sizeof(struct route));
1.2 itojun 199: }
200:
201: static void
1.156 ozaki-r 202: ip6_init2(void)
1.2 itojun 203: {
204:
1.186 maxv 205: /* timer for regeneration of temporary addresses randomize ID */
1.118 ad 206: callout_init(&in6_tmpaddrtimer_ch, CALLOUT_MPSAFE);
1.83 rpaulo 207: callout_reset(&in6_tmpaddrtimer_ch,
208: (ip6_temp_preferred_lifetime - ip6_desync_factor -
209: ip6_temp_regen_advance) * hz,
210: in6_tmpaddrtimer, NULL);
1.2 itojun 211: }
212:
213: /*
214: * IP6 input interrupt handling. Just pass the packet to ip6_input.
215: */
1.148 rmind 216: static void
217: ip6intr(void *arg __unused)
1.2 itojun 218: {
219: struct mbuf *m;
220:
1.183 ozaki-r 221: SOFTNET_LOCK_UNLESS_NET_MPSAFE();
1.148 rmind 222: while ((m = pktq_dequeue(ip6_pktq)) != NULL) {
1.160 ozaki-r 223: struct psref psref;
224: struct ifnet *rcvif = m_get_rcvif_psref(m, &psref);
1.148 rmind 225:
1.160 ozaki-r 226: if (rcvif == NULL) {
227: m_freem(m);
228: continue;
229: }
1.148 rmind 230: /*
231: * Drop the packet if IPv6 is disabled on the interface.
232: */
1.160 ozaki-r 233: if ((ND_IFINFO(rcvif)->flags & ND6_IFF_IFDISABLED)) {
234: m_put_rcvif_psref(rcvif, &psref);
1.83 rpaulo 235: m_freem(m);
1.148 rmind 236: continue;
1.83 rpaulo 237: }
1.160 ozaki-r 238: ip6_input(m, rcvif);
239: m_put_rcvif_psref(rcvif, &psref);
1.2 itojun 240: }
1.183 ozaki-r 241: SOFTNET_UNLOCK_UNLESS_NET_MPSAFE();
1.2 itojun 242: }
243:
244: void
1.160 ozaki-r 245: ip6_input(struct mbuf *m, struct ifnet *rcvif)
1.2 itojun 246: {
1.9 itojun 247: struct ip6_hdr *ip6;
1.105 dyoung 248: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 249: u_int32_t plen;
1.5 itojun 250: u_int32_t rtalert = ~0;
1.188 ! maxv 251: int nxt, ours = 0, rh_present = 0, frg_present;
1.9 itojun 252: struct ifnet *deliverifp = NULL;
1.64 itojun 253: int srcrt = 0;
1.171 ozaki-r 254: struct rtentry *rt = NULL;
1.105 dyoung 255: union {
256: struct sockaddr dst;
257: struct sockaddr_in6 dst6;
258: } u;
1.167 ozaki-r 259: struct route *ro;
1.2 itojun 260:
1.186 maxv 261: KASSERT(rcvif != NULL);
262:
1.2 itojun 263: /*
1.81 rpaulo 264: * make sure we don't have onion peering information into m_tag.
265: */
266: ip6_delaux(m);
267:
268: /*
1.44 itojun 269: * mbuf statistics
1.2 itojun 270: */
271: if (m->m_flags & M_EXT) {
272: if (m->m_next)
1.116 thorpej 273: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 274: else
1.116 thorpej 275: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 276: } else {
1.115 thorpej 277: #define M2MMAX 32
1.2 itojun 278: if (m->m_next) {
1.159 ozaki-r 279: if (m->m_flags & M_LOOP)
1.116 thorpej 280: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.159 ozaki-r 281: else if (rcvif->if_index < M2MMAX)
282: IP6_STATINC(IP6_STAT_M2M + rcvif->if_index);
283: else
1.116 thorpej 284: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 285: } else
1.116 thorpej 286: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 287: #undef M2MMAX
1.2 itojun 288: }
289:
1.159 ozaki-r 290: in6_ifstat_inc(rcvif, ifs6_in_receive);
1.116 thorpej 291: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 292:
1.57 thorpej 293: /*
294: * If the IPv6 header is not aligned, slurp it up into a new
295: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 296: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 297: * IPv6 header is in the first mbuf of the chain.
298: */
1.97 christos 299: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 300: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
1.186 maxv 301: (max_linkhdr + 3) & ~3)) == NULL) {
1.57 thorpej 302: /* XXXJRT new stat, please */
1.116 thorpej 303: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 304: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.57 thorpej 305: return;
306: }
307: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
1.55 itojun 308: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 309: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 310: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.9 itojun 311: return;
312: }
1.2 itojun 313: }
314:
315: ip6 = mtod(m, struct ip6_hdr *);
316:
317: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 318: IP6_STATINC(IP6_STAT_BADVERS);
1.159 ozaki-r 319: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 320: goto bad;
321: }
1.15 darrenr 322:
1.98 liamjfoy 323: /*
324: * Assume that we can create a fast-forward IP flow entry
325: * based on this packet.
326: */
327: m->m_flags |= M_CANFASTFWD;
328:
1.15 darrenr 329: /*
330: * Run through list of hooks for input packets. If there are any
331: * filters which require that additional packets in the flow are
332: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
333: * Note that filters must _never_ set this flag, as another filter
334: * in the list may have previously cleared it.
335: */
1.39 itojun 336: /*
337: * let ipfilter look at packet on the wire,
338: * not the decapsulated packet.
339: */
1.142 christos 340: #if defined(IPSEC)
1.146 christos 341: if (!ipsec_used || !ipsec_indone(m))
1.39 itojun 342: #else
343: if (1)
344: #endif
345: {
1.64 itojun 346: struct in6_addr odst;
347:
348: odst = ip6->ip6_dst;
1.159 ozaki-r 349: if (pfil_run_hooks(inet6_pfil_hook, &m, rcvif, PFIL_IN) != 0)
1.39 itojun 350: return;
351: if (m == NULL)
352: return;
353: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 354: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 355: }
1.15 darrenr 356:
1.116 thorpej 357: IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt);
1.2 itojun 358:
1.30 thorpej 359: #ifdef ALTQ
1.169 ozaki-r 360: if (altq_input != NULL) {
361: SOFTNET_LOCK();
362: if ((*altq_input)(m, AF_INET6) == 0) {
363: SOFTNET_UNLOCK();
364: /* packet is dropped by traffic conditioner */
365: return;
366: }
367: SOFTNET_UNLOCK();
1.9 itojun 368: }
369: #endif
370:
1.2 itojun 371: /*
1.44 itojun 372: * Check against address spoofing/corruption.
1.2 itojun 373: */
374: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
375: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 376: /*
377: * XXX: "badscope" is not very suitable for a multicast source.
378: */
1.116 thorpej 379: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 380: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.2 itojun 381: goto bad;
382: }
1.186 maxv 383:
1.13 itojun 384: /*
1.44 itojun 385: * The following check is not documented in specs. A malicious
386: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
387: * and bypass security checks (act as if it was from 127.0.0.1 by using
388: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 389: *
1.44 itojun 390: * This check chokes if we are in an SIIT cloud. As none of BSDs
391: * support IPv4-less kernel compilation, we cannot support SIIT
392: * environment at all. So, it makes more sense for us to reject any
393: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 394: * partial support for SIIT environment.
1.13 itojun 395: */
396: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
397: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 398: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 399: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 400: goto bad;
401: }
1.186 maxv 402:
1.17 itojun 403: #if 0
1.13 itojun 404: /*
1.17 itojun 405: * Reject packets with IPv4 compatible addresses (auto tunnel).
406: *
407: * The code forbids auto tunnel relay case in RFC1933 (the check is
408: * stronger than RFC1933). We may want to re-enable it if mech-xx
409: * is revised to forbid relaying case.
1.13 itojun 410: */
411: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
412: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
1.116 thorpej 413: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 414: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 415: goto bad;
416: }
417: #endif
1.35 itojun 418:
1.2 itojun 419: /*
1.82 yamt 420: * Disambiguate address scope zones (if there is ambiguity).
421: * We first make sure that the original source or destination address
422: * is not in our internal form for scoped addresses. Such addresses
423: * are not necessarily invalid spec-wise, but we cannot accept them due
424: * to the usage conflict.
425: * in6_setscope() then also checks and rejects the cases where src or
426: * dst are the loopback address and the receiving interface
1.186 maxv 427: * is not loopback.
1.82 yamt 428: */
1.88 bouyer 429: if (__predict_false(
430: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
431: goto bad;
432: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 433: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 434: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 435: goto bad;
436: }
1.159 ozaki-r 437: if (in6_setscope(&ip6->ip6_src, rcvif, NULL) ||
438: in6_setscope(&ip6->ip6_dst, rcvif, NULL)) {
1.116 thorpej 439: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 440: goto bad;
441: }
442:
1.171 ozaki-r 443: ro = percpu_getref(ip6_forward_rt_percpu);
1.186 maxv 444:
1.82 yamt 445: /*
1.2 itojun 446: * Multicast check
447: */
448: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
1.176 ozaki-r 449: bool ingroup;
1.9 itojun 450:
1.159 ozaki-r 451: in6_ifstat_inc(rcvif, ifs6_in_mcast);
1.2 itojun 452: /*
453: * See if we belong to the destination multicast group on the
454: * arrival interface.
455: */
1.176 ozaki-r 456: ingroup = in6_multi_group(&ip6->ip6_dst, rcvif);
1.186 maxv 457: if (ingroup) {
1.2 itojun 458: ours = 1;
1.186 maxv 459: } else if (!ip6_mrouter) {
1.116 thorpej 460: uint64_t *ip6s = IP6_STAT_GETREF();
461: ip6s[IP6_STAT_NOTMEMBER]++;
462: ip6s[IP6_STAT_CANTFORWARD]++;
463: IP6_STAT_PUTREF();
1.159 ozaki-r 464: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.171 ozaki-r 465: goto bad_unref;
1.2 itojun 466: }
1.159 ozaki-r 467: deliverifp = rcvif;
1.2 itojun 468: goto hbhcheck;
469: }
470:
1.105 dyoung 471: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
472:
1.2 itojun 473: /*
1.186 maxv 474: * Unicast check
1.2 itojun 475: */
1.167 ozaki-r 476: rt = rtcache_lookup2(ro, &u.dst, 1, &hit);
1.105 dyoung 477: if (hit)
1.116 thorpej 478: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 479: else
1.116 thorpej 480: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 481:
1.2 itojun 482: /*
483: * Accept the packet if the forwarding interface to the destination
1.186 maxv 484: * (according to the routing table) is the loopback interface,
1.2 itojun 485: * unless the associated route has a gateway.
1.186 maxv 486: *
487: * We don't explicitly match ip6_dst against an interface here. It
488: * is already done in rtcache_lookup2: rt->rt_ifp->if_type will be
489: * IFT_LOOP if the packet is for us.
490: *
1.2 itojun 491: * Note that this approach causes to accept a packet if there is a
492: * route to the loopback interface for the destination of the packet.
493: * But we think it's even useful in some situations, e.g. when using
494: * a special daemon which wants to intercept the packet.
495: */
1.105 dyoung 496: if (rt != NULL &&
497: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
498: rt->rt_ifp->if_type == IFT_LOOP) {
499: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.184 roy 500: int addrok;
501:
1.2 itojun 502: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
503: m->m_flags |= M_ANYCAST6;
1.24 itojun 504: /*
505: * packets to a tentative, duplicated, or somehow invalid
506: * address must not be accepted.
507: */
1.184 roy 508: if (ia6->ia6_flags & IN6_IFF_NOTREADY)
509: addrok = 0;
510: else if (ia6->ia6_flags & IN6_IFF_DETACHED &&
511: !IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src))
512: {
513: /* Allow internal traffic to DETACHED addresses */
514: struct sockaddr_in6 sin6;
515: int s;
516:
517: memset(&sin6, 0, sizeof(sin6));
518: sin6.sin6_family = AF_INET6;
519: sin6.sin6_len = sizeof(sin6);
520: sin6.sin6_addr = ip6->ip6_src;
521: s = pserialize_read_enter();
522: addrok = (ifa_ifwithaddr(sin6tosa(&sin6)) != NULL);
523: pserialize_read_exit(s);
524: } else
1.185 kre 525: addrok = 1;
1.184 roy 526: if (addrok) {
1.24 itojun 527: /* this address is ready */
1.2 itojun 528: ours = 1;
1.9 itojun 529: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 530: goto hbhcheck;
531: } else {
1.24 itojun 532: /* address is not ready, so discard the packet. */
1.172 ryo 533: char ip6bufs[INET6_ADDRSTRLEN];
534: char ip6bufd[INET6_ADDRSTRLEN];
1.157 ozaki-r 535: nd6log(LOG_INFO, "packet to an unready address %s->%s\n",
1.173 christos 536: IN6_PRINT(ip6bufs, &ip6->ip6_src),
537: IN6_PRINT(ip6bufd, &ip6->ip6_dst));
1.24 itojun 538:
1.171 ozaki-r 539: goto bad_unref;
1.2 itojun 540: }
541: }
542:
543: /*
1.55 itojun 544: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 545: */
546: #if defined(NFAITH) && 0 < NFAITH
547: if (ip6_keepfaith) {
1.105 dyoung 548: if (rt != NULL && rt->rt_ifp != NULL &&
549: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 550: /* XXX do we need more sanity checks? */
551: ours = 1;
1.105 dyoung 552: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 553: goto hbhcheck;
554: }
555: }
556: #endif
557:
1.2 itojun 558: /*
559: * Now there is no reason to process the packet if it's not our own
560: * and we're not a router.
561: */
562: if (!ip6_forwarding) {
1.116 thorpej 563: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.159 ozaki-r 564: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.171 ozaki-r 565: goto bad_unref;
1.2 itojun 566: }
567:
1.186 maxv 568: hbhcheck:
1.2 itojun 569: /*
1.186 maxv 570: * Record address information into m_tag, if we don't have one yet.
571: * Note that we are unable to record it, if the address is not listed
1.81 rpaulo 572: * as our interface address (e.g. multicast addresses, addresses
573: * within FAITH prefixes and such).
574: */
1.111 dyoung 575: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 576: struct in6_ifaddr *ia6;
1.165 ozaki-r 577: int s = pserialize_read_enter();
1.81 rpaulo 578:
579: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.165 ozaki-r 580: /* Depends on ip6_setdstifaddr never sleep */
1.111 dyoung 581: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
582: /*
583: * XXX maybe we should drop the packet here,
584: * as we could not provide enough information
585: * to the upper layers.
586: */
1.81 rpaulo 587: }
1.165 ozaki-r 588: pserialize_read_exit(s);
1.81 rpaulo 589: }
590:
591: /*
1.2 itojun 592: * Process Hop-by-Hop options header if it's contained.
593: * m may be modified in ip6_hopopts_input().
594: * If a JumboPayload option is included, plen will also be modified.
595: */
596: plen = (u_int32_t)ntohs(ip6->ip6_plen);
597: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 598: struct ip6_hbh *hbh;
599:
600: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
1.186 maxv 601: /* m already freed */
1.159 ozaki-r 602: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.171 ozaki-r 603: rtcache_unref(rt, ro);
604: percpu_putref(ip6_forward_rt_percpu);
1.186 maxv 605: return;
1.9 itojun 606: }
1.22 itojun 607:
1.2 itojun 608: /* adjust pointer */
609: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 610:
611: /*
1.49 itojun 612: * if the payload length field is 0 and the next header field
1.22 itojun 613: * indicates Hop-by-Hop Options header, then a Jumbo Payload
614: * option MUST be included.
615: */
616: if (ip6->ip6_plen == 0 && plen == 0) {
617: /*
618: * Note that if a valid jumbo payload option is
1.83 rpaulo 619: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 620: * (non-zero) payload length to the variable plen.
1.22 itojun 621: */
1.116 thorpej 622: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.159 ozaki-r 623: in6_ifstat_inc(rcvif, ifs6_in_discard);
624: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.22 itojun 625: icmp6_error(m, ICMP6_PARAM_PROB,
626: ICMP6_PARAMPROB_HEADER,
1.97 christos 627: (char *)&ip6->ip6_plen - (char *)ip6);
1.171 ozaki-r 628: rtcache_unref(rt, ro);
629: percpu_putref(ip6_forward_rt_percpu);
1.22 itojun 630: return;
631: }
1.9 itojun 632: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
633: sizeof(struct ip6_hbh));
634: if (hbh == NULL) {
1.116 thorpej 635: IP6_STATINC(IP6_STAT_TOOSHORT);
1.171 ozaki-r 636: rtcache_unref(rt, ro);
637: percpu_putref(ip6_forward_rt_percpu);
1.9 itojun 638: return;
639: }
1.57 thorpej 640: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 641: nxt = hbh->ip6h_nxt;
1.2 itojun 642:
643: /*
644: * accept the packet if a router alert option is included
645: * and we act as an IPv6 router.
646: */
1.5 itojun 647: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 648: ours = 1;
649: } else
650: nxt = ip6->ip6_nxt;
651:
652: /*
1.186 maxv 653: * Check that the amount of data in the buffers is at least much as
654: * the IPv6 header would have us expect. Trim mbufs if longer than we
655: * expect. Drop packet if shorter than we expect.
1.2 itojun 656: */
657: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 658: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 659: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.171 ozaki-r 660: goto bad_unref;
1.2 itojun 661: }
662: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
663: if (m->m_len == m->m_pkthdr.len) {
664: m->m_len = sizeof(struct ip6_hdr) + plen;
665: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
666: } else
667: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
668: }
669:
670: /*
671: * Forward if desirable.
672: */
673: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
674: /*
675: * If we are acting as a multicast router, all
676: * incoming multicast packets are passed to the
677: * kernel-level multicast forwarding function.
678: * The packet is returned (relatively) intact; if
679: * ip6_mforward() returns a non-zero value, the packet
680: * must be discarded, else it may be accepted below.
681: */
1.169 ozaki-r 682: if (ip6_mrouter != NULL) {
683: int error;
684:
685: SOFTNET_LOCK();
686: error = ip6_mforward(ip6, rcvif, m);
687: SOFTNET_UNLOCK();
688:
689: if (error != 0) {
1.171 ozaki-r 690: rtcache_unref(rt, ro);
691: percpu_putref(ip6_forward_rt_percpu);
1.169 ozaki-r 692: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.170 ozaki-r 693: goto bad;
1.169 ozaki-r 694: }
1.2 itojun 695: }
1.170 ozaki-r 696: if (!ours)
1.171 ozaki-r 697: goto bad_unref;
1.22 itojun 698: } else if (!ours) {
1.171 ozaki-r 699: rtcache_unref(rt, ro);
700: percpu_putref(ip6_forward_rt_percpu);
1.64 itojun 701: ip6_forward(m, srcrt);
1.2 itojun 702: return;
1.56 itojun 703: }
1.25 itojun 704:
705: ip6 = mtod(m, struct ip6_hdr *);
706:
707: /*
708: * Malicious party may be able to use IPv4 mapped addr to confuse
709: * tcp/udp stack and bypass security checks (act as if it was from
710: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
711: *
712: * For SIIT end node behavior, you may want to disable the check.
713: * However, you will become vulnerable to attacks using IPv4 mapped
714: * source.
715: */
716: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
717: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 718: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 719: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.171 ozaki-r 720: goto bad_unref;
1.25 itojun 721: }
1.2 itojun 722:
1.12 itojun 723: #ifdef IFA_STATS
1.28 itojun 724: if (deliverifp != NULL) {
1.9 itojun 725: struct in6_ifaddr *ia6;
1.165 ozaki-r 726: int s = pserialize_read_enter();
1.9 itojun 727: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
728: if (ia6)
729: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
1.165 ozaki-r 730: pserialize_read_exit(s);
1.9 itojun 731: }
732: #endif
1.116 thorpej 733: IP6_STATINC(IP6_STAT_DELIVERED);
1.9 itojun 734: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 735: nest = 0;
1.40 itojun 736:
1.171 ozaki-r 737: if (rt != NULL) {
738: rtcache_unref(rt, ro);
739: rt = NULL;
740: }
741: percpu_putref(ip6_forward_rt_percpu);
742:
1.104 yamt 743: rh_present = 0;
1.188 ! maxv 744: frg_present = 0;
1.2 itojun 745: while (nxt != IPPROTO_DONE) {
746: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.116 thorpej 747: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.159 ozaki-r 748: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 749: goto bad;
750: }
1.8 itojun 751:
752: /*
753: * protection against faulty packet - there should be
754: * more sanity checks in header chain processing.
755: */
756: if (m->m_pkthdr.len < off) {
1.116 thorpej 757: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 758: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.8 itojun 759: goto bad;
760: }
761:
1.104 yamt 762: if (nxt == IPPROTO_ROUTING) {
763: if (rh_present++) {
1.159 ozaki-r 764: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.116 thorpej 765: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 766: goto bad;
767: }
1.188 ! maxv 768: } else if (nxt == IPPROTO_FRAGMENT) {
! 769: if (frg_present++) {
! 770: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
! 771: IP6_STATINC(IP6_STAT_BADOPTIONS);
! 772: goto bad;
! 773: }
1.104 yamt 774: }
775:
1.142 christos 776: #ifdef IPSEC
1.146 christos 777: if (ipsec_used) {
1.94 degroote 778: /*
1.186 maxv 779: * Enforce IPsec policy checking if we are seeing last
780: * header. Note that we do not visit this with
1.146 christos 781: * protocols with pcb layer code - like udp/tcp/raw ip.
1.94 degroote 782: */
1.146 christos 783: if ((inet6sw[ip_protox[nxt]].pr_flags
784: & PR_LASTHDR) != 0) {
1.169 ozaki-r 785: int error;
786:
787: error = ipsec6_input(m);
1.146 christos 788: if (error)
789: goto bad;
790: }
1.94 degroote 791: }
1.186 maxv 792: #endif
1.94 degroote 793:
1.2 itojun 794: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
795: }
796: return;
1.171 ozaki-r 797:
1.186 maxv 798: bad_unref:
1.171 ozaki-r 799: rtcache_unref(rt, ro);
800: percpu_putref(ip6_forward_rt_percpu);
1.186 maxv 801: bad:
1.2 itojun 802: m_freem(m);
1.171 ozaki-r 803: return;
1.2 itojun 804: }
805:
806: /*
1.81 rpaulo 807: * set/grab in6_ifaddr correspond to IPv6 destination address.
808: */
809: static struct m_tag *
1.112 dyoung 810: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 811: {
812: struct m_tag *mtag;
1.144 christos 813: struct ip6aux *ip6a;
1.81 rpaulo 814:
815: mtag = ip6_addaux(m);
1.144 christos 816: if (mtag == NULL)
817: return NULL;
1.112 dyoung 818:
1.144 christos 819: ip6a = (struct ip6aux *)(mtag + 1);
820: if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) {
821: IP6_STATINC(IP6_STAT_BADSCOPE);
822: return NULL;
1.112 dyoung 823: }
1.144 christos 824:
825: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
826: ip6a->ip6a_flags = ia->ia6_flags;
827: return mtag;
1.81 rpaulo 828: }
829:
1.112 dyoung 830: const struct ip6aux *
1.107 christos 831: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 832: {
833: struct m_tag *mtag;
834:
835: mtag = ip6_findaux(m);
1.112 dyoung 836: if (mtag != NULL)
837: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 838: else
839: return NULL;
840: }
841:
842: /*
1.2 itojun 843: * Hop-by-Hop options header processing. If a valid jumbo payload option is
844: * included, the real payload length will be stored in plenp.
1.107 christos 845: *
846: * rtalertp - XXX: should be stored more smart way
1.2 itojun 847: */
1.136 drochner 848: int
1.107 christos 849: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
850: struct mbuf **mp, int *offp)
1.2 itojun 851: {
1.35 itojun 852: struct mbuf *m = *mp;
1.2 itojun 853: int off = *offp, hbhlen;
854: struct ip6_hbh *hbh;
855:
856: /* validation of the length of the header */
1.9 itojun 857: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
858: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
859: if (hbh == NULL) {
1.116 thorpej 860: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 861: return -1;
862: }
863: hbhlen = (hbh->ip6h_len + 1) << 3;
864: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
865: hbhlen);
866: if (hbh == NULL) {
1.116 thorpej 867: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 868: return -1;
869: }
1.57 thorpej 870: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 871: off += hbhlen;
872: hbhlen -= sizeof(struct ip6_hbh);
873:
874: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
875: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 876: return (-1);
1.2 itojun 877:
878: *offp = off;
879: *mp = m;
1.58 itojun 880: return (0);
1.2 itojun 881: }
882:
883: /*
884: * Search header for all Hop-by-hop options and process each option.
885: * This function is separate from ip6_hopopts_input() in order to
886: * handle a case where the sending node itself process its hop-by-hop
887: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 888: *
889: * The function assumes that hbh header is located right after the IPv6 header
890: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
891: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 892: */
1.136 drochner 893: static int
1.107 christos 894: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
895: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 896: {
897: struct ip6_hdr *ip6;
898: int optlen = 0;
899: u_int8_t *opt = opthead;
900: u_int16_t rtalert_val;
1.22 itojun 901: u_int32_t jumboplen;
1.55 itojun 902: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 903:
904: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 905: switch (*opt) {
906: case IP6OPT_PAD1:
907: optlen = 1;
908: break;
909: case IP6OPT_PADN:
910: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 911: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 912: goto bad;
913: }
914: optlen = *(opt + 1) + 2;
915: break;
916: case IP6OPT_RTALERT:
917: /* XXX may need check for alignment */
918: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 919: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 920: goto bad;
921: }
922: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 923: /* XXX stat */
924: icmp6_error(m, ICMP6_PARAM_PROB,
925: ICMP6_PARAMPROB_HEADER,
926: erroff + opt + 1 - opthead);
927: return (-1);
1.35 itojun 928: }
929: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 930: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 931: *rtalertp = ntohs(rtalert_val);
932: break;
933: case IP6OPT_JUMBO:
1.22 itojun 934: /* XXX may need check for alignment */
935: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 936: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 937: goto bad;
938: }
1.35 itojun 939: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 940: /* XXX stat */
941: icmp6_error(m, ICMP6_PARAM_PROB,
942: ICMP6_PARAMPROB_HEADER,
943: erroff + opt + 1 - opthead);
944: return (-1);
1.35 itojun 945: }
1.22 itojun 946: optlen = IP6OPT_JUMBO_LEN;
947:
948: /*
949: * IPv6 packets that have non 0 payload length
1.35 itojun 950: * must not contain a jumbo payload option.
1.22 itojun 951: */
952: ip6 = mtod(m, struct ip6_hdr *);
953: if (ip6->ip6_plen) {
1.116 thorpej 954: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 955: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 956: ICMP6_PARAMPROB_HEADER,
957: erroff + opt - opthead);
958: return (-1);
1.22 itojun 959: }
1.2 itojun 960:
1.22 itojun 961: /*
962: * We may see jumbolen in unaligned location, so
963: * we'd need to perform bcopy().
964: */
1.126 tsutsui 965: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 966: jumboplen = (u_int32_t)htonl(jumboplen);
967:
968: #if 1
969: /*
970: * if there are multiple jumbo payload options,
971: * *plenp will be non-zero and the packet will be
972: * rejected.
973: * the behavior may need some debate in ipngwg -
974: * multiple options does not make sense, however,
975: * there's no explicit mention in specification.
976: */
977: if (*plenp != 0) {
1.116 thorpej 978: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 979: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 980: ICMP6_PARAMPROB_HEADER,
981: erroff + opt + 2 - opthead);
982: return (-1);
1.22 itojun 983: }
1.8 itojun 984: #endif
1.2 itojun 985:
1.22 itojun 986: /*
987: * jumbo payload length must be larger than 65535.
988: */
989: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 990: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 991: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 992: ICMP6_PARAMPROB_HEADER,
993: erroff + opt + 2 - opthead);
994: return (-1);
1.22 itojun 995: }
996: *plenp = jumboplen;
997:
998: break;
1.35 itojun 999: default: /* unknown option */
1000: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 1001: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 1002: goto bad;
1003: }
1.55 itojun 1004: optlen = ip6_unknown_opt(opt, m,
1005: erroff + opt - opthead);
1006: if (optlen == -1)
1007: return (-1);
1.35 itojun 1008: optlen += 2;
1009: break;
1.2 itojun 1010: }
1011: }
1012:
1.55 itojun 1013: return (0);
1.2 itojun 1014:
1015: bad:
1016: m_freem(m);
1.55 itojun 1017: return (-1);
1.2 itojun 1018: }
1019:
1020: /*
1021: * Unknown option processing.
1022: * The third argument `off' is the offset from the IPv6 header to the option,
1023: * which is necessary if the IPv6 header the and option header and IPv6 header
1024: * is not continuous in order to return an ICMPv6 error.
1025: */
1026: int
1.107 christos 1027: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1028: {
1029: struct ip6_hdr *ip6;
1030:
1.35 itojun 1031: switch (IP6OPT_TYPE(*optp)) {
1032: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1033: return ((int)*(optp + 1));
1.35 itojun 1034: case IP6OPT_TYPE_DISCARD: /* silently discard */
1035: m_freem(m);
1.58 itojun 1036: return (-1);
1.35 itojun 1037: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 1038: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1039: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1040: return (-1);
1.35 itojun 1041: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 1042: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1043: ip6 = mtod(m, struct ip6_hdr *);
1044: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1045: (m->m_flags & (M_BCAST|M_MCAST)))
1046: m_freem(m);
1047: else
1048: icmp6_error(m, ICMP6_PARAM_PROB,
1049: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1050: return (-1);
1.2 itojun 1051: }
1052:
1053: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1054: return (-1);
1.2 itojun 1055: }
1056:
1057: /*
1.9 itojun 1058: * Create the "control" list for this pcb.
1059: *
1060: * The routine will be called from upper layer handlers like tcp6_input().
1061: * Thus the routine assumes that the caller (tcp6_input) have already
1062: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1063: * very first mbuf on the mbuf chain.
1064: * We may want to add some infinite loop prevention or sanity checks for safety.
1065: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1066: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1067: */
1068: void
1.107 christos 1069: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1070: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1071: {
1.179 christos 1072: struct socket *so = in6p->in6p_socket;
1.85 rpaulo 1073: #ifdef RFC2292
1074: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1075: #else
1076: #define IS2292(x, y) (y)
1077: #endif
1078:
1.179 christos 1079: if (SOOPT_TIMESTAMP(so->so_options))
1080: mp = sbsavetimestamp(so->so_options, m, mp);
1.87 rpaulo 1081:
1082: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1083: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1084: return;
1085:
1.2 itojun 1086: /* RFC 2292 sec. 5 */
1.35 itojun 1087: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1088: struct in6_pktinfo pi6;
1.85 rpaulo 1089:
1.126 tsutsui 1090: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1091: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.160 ozaki-r 1092: pi6.ipi6_ifindex = m->m_pkthdr.rcvif_index;
1.180 christos 1093: *mp = sbcreatecontrol(&pi6, sizeof(pi6),
1.85 rpaulo 1094: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1095: if (*mp)
1096: mp = &(*mp)->m_next;
1097: }
1.85 rpaulo 1098:
1.2 itojun 1099: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1100: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1101:
1.180 christos 1102: *mp = sbcreatecontrol(&hlim, sizeof(hlim),
1.85 rpaulo 1103: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1104: if (*mp)
1105: mp = &(*mp)->m_next;
1106: }
1107:
1108: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1109: u_int32_t flowinfo;
1110: int tclass;
1111:
1112: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1113: flowinfo >>= 20;
1114:
1115: tclass = flowinfo & 0xff;
1.180 christos 1116: *mp = sbcreatecontrol(&tclass, sizeof(tclass),
1.85 rpaulo 1117: IPV6_TCLASS, IPPROTO_IPV6);
1118:
1.2 itojun 1119: if (*mp)
1120: mp = &(*mp)->m_next;
1121: }
1122:
1123: /*
1.75 itojun 1124: * IPV6_HOPOPTS socket option. Recall that we required super-user
1125: * privilege for the option (see ip6_ctloutput), but it might be too
1126: * strict, since there might be some hop-by-hop options which can be
1127: * returned to normal user.
1.85 rpaulo 1128: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1129: */
1.75 itojun 1130: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1131: /*
1132: * Check if a hop-by-hop options header is contatined in the
1133: * received packet, and if so, store the options as ancillary
1134: * data. Note that a hop-by-hop options header must be
1135: * just after the IPv6 header, which fact is assured through
1136: * the IPv6 input processing.
1137: */
1.78 christos 1138: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1139: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1140: struct ip6_hbh *hbh;
1141: int hbhlen;
1.62 itojun 1142: struct mbuf *ext;
1.9 itojun 1143:
1.62 itojun 1144: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1145: xip6->ip6_nxt);
1.62 itojun 1146: if (ext == NULL) {
1.116 thorpej 1147: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1148: return;
1149: }
1.62 itojun 1150: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1151: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1152: if (hbhlen != ext->m_len) {
1153: m_freem(ext);
1.116 thorpej 1154: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1155: return;
1156: }
1.2 itojun 1157:
1158: /*
1159: * XXX: We copy whole the header even if a jumbo
1160: * payload option is included, which option is to
1161: * be removed before returning in the RFC 2292.
1.85 rpaulo 1162: * Note: this constraint is removed in RFC3542.
1.2 itojun 1163: */
1.180 christos 1164: *mp = sbcreatecontrol(hbh, hbhlen,
1.85 rpaulo 1165: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1166: IPPROTO_IPV6);
1.2 itojun 1167: if (*mp)
1168: mp = &(*mp)->m_next;
1.62 itojun 1169: m_freem(ext);
1.2 itojun 1170: }
1171: }
1172:
1173: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1174: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1175: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1176: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1177:
1178: /*
1179: * Search for destination options headers or routing
1180: * header(s) through the header chain, and stores each
1181: * header as ancillary data.
1182: * Note that the order of the headers remains in
1183: * the chain of ancillary data.
1184: */
1.86 rpaulo 1185: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1186: struct ip6_ext *ip6e = NULL;
1.9 itojun 1187: int elen;
1.62 itojun 1188: struct mbuf *ext = NULL;
1.9 itojun 1189:
1.62 itojun 1190: /*
1191: * if it is not an extension header, don't try to
1192: * pull it from the chain.
1193: */
1194: switch (nxt) {
1195: case IPPROTO_DSTOPTS:
1196: case IPPROTO_ROUTING:
1197: case IPPROTO_HOPOPTS:
1198: case IPPROTO_AH: /* is it possible? */
1199: break;
1200: default:
1201: goto loopend;
1202: }
1203:
1204: ext = ip6_pullexthdr(m, off, nxt);
1205: if (ext == NULL) {
1.116 thorpej 1206: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1207: return;
1208: }
1.62 itojun 1209: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1210: if (nxt == IPPROTO_AH)
1211: elen = (ip6e->ip6e_len + 2) << 2;
1212: else
1213: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1214: if (elen != ext->m_len) {
1215: m_freem(ext);
1.116 thorpej 1216: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1217: return;
1218: }
1.57 thorpej 1219: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1220:
1.35 itojun 1221: switch (nxt) {
1.62 itojun 1222: case IPPROTO_DSTOPTS:
1.127 martin 1223: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1224: break;
1225:
1.180 christos 1226: *mp = sbcreatecontrol(ip6e, elen,
1.85 rpaulo 1227: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1228: IPPROTO_IPV6);
1.35 itojun 1229: if (*mp)
1230: mp = &(*mp)->m_next;
1231: break;
1232:
1233: case IPPROTO_ROUTING:
1.127 martin 1234: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1235: break;
1236:
1.180 christos 1237: *mp = sbcreatecontrol(ip6e, elen,
1.85 rpaulo 1238: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1239: IPPROTO_IPV6);
1.35 itojun 1240: if (*mp)
1241: mp = &(*mp)->m_next;
1242: break;
1243:
1.62 itojun 1244: case IPPROTO_HOPOPTS:
1245: case IPPROTO_AH: /* is it possible? */
1246: break;
1247:
1.35 itojun 1248: default:
1249: /*
1.62 itojun 1250: * other cases have been filtered in the above.
1251: * none will visit this case. here we supply
1252: * the code just in case (nxt overwritten or
1253: * other cases).
1.35 itojun 1254: */
1.62 itojun 1255: m_freem(ext);
1.35 itojun 1256: goto loopend;
1257:
1.2 itojun 1258: }
1259:
1260: /* proceed with the next header. */
1.9 itojun 1261: off += elen;
1.2 itojun 1262: nxt = ip6e->ip6e_nxt;
1.62 itojun 1263: ip6e = NULL;
1264: m_freem(ext);
1265: ext = NULL;
1.2 itojun 1266: }
1267: loopend:
1.62 itojun 1268: ;
1.2 itojun 1269: }
1.62 itojun 1270: }
1.85 rpaulo 1271: #undef IS2292
1272:
1273:
1274: void
1.95 dyoung 1275: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1276: uint32_t *mtu)
1.85 rpaulo 1277: {
1278: struct socket *so;
1279: struct mbuf *m_mtu;
1280: struct ip6_mtuinfo mtuctl;
1281:
1282: so = in6p->in6p_socket;
1283:
1284: if (mtu == NULL)
1285: return;
1286:
1.177 ozaki-r 1287: KASSERT(so != NULL);
1.85 rpaulo 1288:
1289: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1290: mtuctl.ip6m_mtu = *mtu;
1291: mtuctl.ip6m_addr = *dst;
1292: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1293: return;
1294:
1.180 christos 1295: if ((m_mtu = sbcreatecontrol(&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1296: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1297: return;
1298:
1.95 dyoung 1299: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1300: == 0) {
1301: m_freem(m_mtu);
1302: /* XXX: should count statistics */
1303: } else
1304: sorwakeup(so);
1305:
1306: return;
1307: }
1.62 itojun 1308:
1309: /*
1310: * pull single extension header from mbuf chain. returns single mbuf that
1311: * contains the result, or NULL on error.
1312: */
1313: static struct mbuf *
1.107 christos 1314: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1315: {
1316: struct ip6_ext ip6e;
1317: size_t elen;
1318: struct mbuf *n;
1319:
1320: #ifdef DIAGNOSTIC
1321: switch (nxt) {
1322: case IPPROTO_DSTOPTS:
1323: case IPPROTO_ROUTING:
1324: case IPPROTO_HOPOPTS:
1325: case IPPROTO_AH: /* is it possible? */
1326: break;
1327: default:
1328: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1329: }
1.62 itojun 1330: #endif
1.2 itojun 1331:
1.97 christos 1332: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1333: if (nxt == IPPROTO_AH)
1334: elen = (ip6e.ip6e_len + 2) << 2;
1335: else
1336: elen = (ip6e.ip6e_len + 1) << 3;
1337:
1338: MGET(n, M_DONTWAIT, MT_DATA);
1339: if (n && elen >= MLEN) {
1340: MCLGET(n, M_DONTWAIT);
1341: if ((n->m_flags & M_EXT) == 0) {
1342: m_free(n);
1343: n = NULL;
1344: }
1345: }
1346: if (!n)
1347: return NULL;
1348:
1349: n->m_len = 0;
1350: if (elen >= M_TRAILINGSPACE(n)) {
1351: m_free(n);
1352: return NULL;
1353: }
1354:
1.97 christos 1355: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1356: n->m_len = elen;
1357: return n;
1.2 itojun 1358: }
1359:
1360: /*
1.187 maxv 1361: * Get offset to the previous header followed by the header
1.2 itojun 1362: * currently processed.
1363: */
1.187 maxv 1364: int
1.107 christos 1365: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1366: {
1367: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1368:
1.187 maxv 1369: if (off == sizeof(struct ip6_hdr)) {
1370: return offsetof(struct ip6_hdr, ip6_nxt);
1371: } else if (off < sizeof(struct ip6_hdr)) {
1372: panic("%s: off < sizeof(struct ip6_hdr)", __func__);
1373: } else {
1374: int len, nlen, nxt;
1375: struct ip6_ext ip6e;
1.2 itojun 1376:
1377: nxt = ip6->ip6_nxt;
1378: len = sizeof(struct ip6_hdr);
1.187 maxv 1379: nlen = 0;
1.2 itojun 1380: while (len < off) {
1.187 maxv 1381: m_copydata(m, len, sizeof(ip6e), &ip6e);
1.2 itojun 1382:
1.35 itojun 1383: switch (nxt) {
1.2 itojun 1384: case IPPROTO_FRAGMENT:
1.187 maxv 1385: nlen = sizeof(struct ip6_frag);
1.2 itojun 1386: break;
1387: case IPPROTO_AH:
1.187 maxv 1388: nlen = (ip6e.ip6e_len + 2) << 2;
1.2 itojun 1389: break;
1390: default:
1.187 maxv 1391: nlen = (ip6e.ip6e_len + 1) << 3;
1.2 itojun 1392: break;
1393: }
1.187 maxv 1394: len += nlen;
1395: nxt = ip6e.ip6e_nxt;
1.2 itojun 1396: }
1.187 maxv 1397:
1398: return (len - nlen);
1.18 itojun 1399: }
1400: }
1401:
1402: /*
1403: * get next header offset. m will be retained.
1404: */
1405: int
1.107 christos 1406: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1407: {
1408: struct ip6_hdr ip6;
1409: struct ip6_ext ip6e;
1410: struct ip6_frag fh;
1411:
1412: /* just in case */
1413: if (m == NULL)
1414: panic("ip6_nexthdr: m == NULL");
1415: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1416: return -1;
1417:
1418: switch (proto) {
1419: case IPPROTO_IPV6:
1.83 rpaulo 1420: /* do not chase beyond intermediate IPv6 headers */
1421: if (off != 0)
1422: return -1;
1.18 itojun 1423: if (m->m_pkthdr.len < off + sizeof(ip6))
1424: return -1;
1.97 christos 1425: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1426: if (nxtp)
1427: *nxtp = ip6.ip6_nxt;
1428: off += sizeof(ip6);
1429: return off;
1430:
1431: case IPPROTO_FRAGMENT:
1432: /*
1433: * terminate parsing if it is not the first fragment,
1434: * it does not make sense to parse through it.
1435: */
1436: if (m->m_pkthdr.len < off + sizeof(fh))
1437: return -1;
1.97 christos 1438: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1439: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1440: return -1;
1441: if (nxtp)
1442: *nxtp = fh.ip6f_nxt;
1443: off += sizeof(struct ip6_frag);
1444: return off;
1445:
1446: case IPPROTO_AH:
1447: if (m->m_pkthdr.len < off + sizeof(ip6e))
1448: return -1;
1.97 christos 1449: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1450: if (nxtp)
1451: *nxtp = ip6e.ip6e_nxt;
1452: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1453: if (m->m_pkthdr.len < off)
1454: return -1;
1.18 itojun 1455: return off;
1456:
1457: case IPPROTO_HOPOPTS:
1458: case IPPROTO_ROUTING:
1459: case IPPROTO_DSTOPTS:
1460: if (m->m_pkthdr.len < off + sizeof(ip6e))
1461: return -1;
1.97 christos 1462: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1463: if (nxtp)
1464: *nxtp = ip6e.ip6e_nxt;
1465: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1466: if (m->m_pkthdr.len < off)
1467: return -1;
1.18 itojun 1468: return off;
1469:
1470: case IPPROTO_NONE:
1471: case IPPROTO_ESP:
1472: case IPPROTO_IPCOMP:
1473: /* give up */
1474: return -1;
1475:
1476: default:
1477: return -1;
1478: }
1479: }
1480:
1481: /*
1482: * get offset for the last header in the chain. m will be kept untainted.
1483: */
1484: int
1.107 christos 1485: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1486: {
1487: int newoff;
1488: int nxt;
1489:
1490: if (!nxtp) {
1491: nxt = -1;
1492: nxtp = &nxt;
1493: }
1.86 rpaulo 1494: for (;;) {
1.18 itojun 1495: newoff = ip6_nexthdr(m, off, proto, nxtp);
1496: if (newoff < 0)
1497: return off;
1498: else if (newoff < off)
1499: return -1; /* invalid */
1500: else if (newoff == off)
1501: return newoff;
1502:
1503: off = newoff;
1504: proto = *nxtp;
1.2 itojun 1505: }
1506: }
1507:
1.81 rpaulo 1508: struct m_tag *
1.107 christos 1509: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1510: {
1511: struct m_tag *mtag;
1512:
1513: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1514: if (!mtag) {
1515: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1516: M_NOWAIT);
1517: if (mtag) {
1518: m_tag_prepend(m, mtag);
1.124 cegger 1519: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1520: }
1521: }
1522: return mtag;
1523: }
1524:
1525: struct m_tag *
1.107 christos 1526: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1527: {
1528: struct m_tag *mtag;
1529:
1530: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1531: return mtag;
1532: }
1533:
1534: void
1.107 christos 1535: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1536: {
1537: struct m_tag *mtag;
1538:
1539: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1540: if (mtag)
1541: m_tag_delete(m, mtag);
1542: }
1543:
1.2 itojun 1544: /*
1545: * System control for IP6
1546: */
1547:
1.120 matt 1548: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1549: 0, 0, 0, 0,
1550: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1551: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1552: EMSGSIZE, EHOSTUNREACH, 0, 0,
1553: 0, 0, 0, 0,
1554: ENOPROTOOPT
1555: };
1556:
1.153 christos 1557: extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS);
1558:
1.116 thorpej 1559: static int
1560: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1561: {
1562:
1.119 thorpej 1563: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1564: }
1565:
1.128 pooka 1566: static void
1567: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1568: {
1.85 rpaulo 1569: #ifdef RFC2292
1570: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1571: #else
1572: #define IS2292(x, y) (y)
1573: #endif
1.26 itojun 1574:
1.73 atatat 1575: sysctl_createv(clog, 0, NULL, NULL,
1576: CTLFLAG_PERMANENT,
1.74 atatat 1577: CTLTYPE_NODE, "inet6",
1578: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1579: NULL, 0, NULL, 0,
1580: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1581: sysctl_createv(clog, 0, NULL, NULL,
1582: CTLFLAG_PERMANENT,
1.74 atatat 1583: CTLTYPE_NODE, "ip6",
1584: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1585: NULL, 0, NULL, 0,
1586: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1587:
1.73 atatat 1588: sysctl_createv(clog, 0, NULL, NULL,
1589: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1590: CTLTYPE_INT, "forwarding",
1591: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1592: NULL, 0, &ip6_forwarding, 0,
1593: CTL_NET, PF_INET6, IPPROTO_IPV6,
1594: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1595: sysctl_createv(clog, 0, NULL, NULL,
1596: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1597: CTLTYPE_INT, "redirect",
1598: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1599: NULL, 0, &ip6_sendredirects, 0,
1600: CTL_NET, PF_INET6, IPPROTO_IPV6,
1601: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1602: sysctl_createv(clog, 0, NULL, NULL,
1603: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1604: CTLTYPE_INT, "hlim",
1605: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1606: NULL, 0, &ip6_defhlim, 0,
1607: CTL_NET, PF_INET6, IPPROTO_IPV6,
1608: IPV6CTL_DEFHLIM, CTL_EOL);
1609: #ifdef notyet
1.73 atatat 1610: sysctl_createv(clog, 0, NULL, NULL,
1611: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1612: CTLTYPE_INT, "mtu", NULL,
1613: NULL, 0, &, 0,
1614: CTL_NET, PF_INET6, IPPROTO_IPV6,
1615: IPV6CTL_DEFMTU, CTL_EOL);
1616: #endif
1617: #ifdef __no_idea__
1.73 atatat 1618: sysctl_createv(clog, 0, NULL, NULL,
1619: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1620: CTLTYPE_INT, "forwsrcrt", NULL,
1621: NULL, 0, &?, 0,
1622: CTL_NET, PF_INET6, IPPROTO_IPV6,
1623: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1624: sysctl_createv(clog, 0, NULL, NULL,
1625: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1626: CTLTYPE_STRUCT, "mrtstats", NULL,
1627: NULL, 0, &?, sizeof(?),
1628: CTL_NET, PF_INET6, IPPROTO_IPV6,
1629: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1630: sysctl_createv(clog, 0, NULL, NULL,
1631: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1632: CTLTYPE_?, "mrtproto", NULL,
1633: NULL, 0, &?, sizeof(?),
1634: CTL_NET, PF_INET6, IPPROTO_IPV6,
1635: IPV6CTL_MRTPROTO, CTL_EOL);
1636: #endif
1.73 atatat 1637: sysctl_createv(clog, 0, NULL, NULL,
1638: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1639: CTLTYPE_INT, "maxfragpackets",
1640: SYSCTL_DESCR("Maximum number of fragments to buffer "
1641: "for reassembly"),
1.70 atatat 1642: NULL, 0, &ip6_maxfragpackets, 0,
1643: CTL_NET, PF_INET6, IPPROTO_IPV6,
1644: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1645: #ifdef __no_idea__
1.73 atatat 1646: sysctl_createv(clog, 0, NULL, NULL,
1647: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1648: CTLTYPE_INT, "sourcecheck", NULL,
1649: NULL, 0, &?, 0,
1650: CTL_NET, PF_INET6, IPPROTO_IPV6,
1651: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1652: sysctl_createv(clog, 0, NULL, NULL,
1653: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1654: CTLTYPE_INT, "sourcecheck_logint", NULL,
1655: NULL, 0, &?, 0,
1656: CTL_NET, PF_INET6, IPPROTO_IPV6,
1657: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1658: #endif
1.73 atatat 1659: sysctl_createv(clog, 0, NULL, NULL,
1660: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1661: CTLTYPE_INT, "accept_rtadv",
1662: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1663: NULL, 0, &ip6_accept_rtadv, 0,
1664: CTL_NET, PF_INET6, IPPROTO_IPV6,
1665: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1666: sysctl_createv(clog, 0, NULL, NULL,
1667: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1668: CTLTYPE_INT, "rtadv_maxroutes",
1669: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1670: NULL, 0, &ip6_rtadv_maxroutes, 0,
1671: CTL_NET, PF_INET6, IPPROTO_IPV6,
1672: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1673: sysctl_createv(clog, 0, NULL, NULL,
1674: CTLFLAG_PERMANENT,
1675: CTLTYPE_INT, "rtadv_numroutes",
1676: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1677: NULL, 0, &nd6_numroutes, 0,
1678: CTL_NET, PF_INET6, IPPROTO_IPV6,
1679: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1680: sysctl_createv(clog, 0, NULL, NULL,
1681: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1682: CTLTYPE_INT, "keepfaith",
1683: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1684: NULL, 0, &ip6_keepfaith, 0,
1685: CTL_NET, PF_INET6, IPPROTO_IPV6,
1686: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1687: sysctl_createv(clog, 0, NULL, NULL,
1688: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1689: CTLTYPE_INT, "log_interval",
1690: SYSCTL_DESCR("Minumum interval between logging "
1691: "unroutable packets"),
1.70 atatat 1692: NULL, 0, &ip6_log_interval, 0,
1693: CTL_NET, PF_INET6, IPPROTO_IPV6,
1694: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1695: sysctl_createv(clog, 0, NULL, NULL,
1696: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1697: CTLTYPE_INT, "hdrnestlimit",
1698: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1699: NULL, 0, &ip6_hdrnestlimit, 0,
1700: CTL_NET, PF_INET6, IPPROTO_IPV6,
1701: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1702: sysctl_createv(clog, 0, NULL, NULL,
1703: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1704: CTLTYPE_INT, "dad_count",
1705: SYSCTL_DESCR("Number of Duplicate Address Detection "
1706: "probes to send"),
1.70 atatat 1707: NULL, 0, &ip6_dad_count, 0,
1708: CTL_NET, PF_INET6, IPPROTO_IPV6,
1709: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1710: sysctl_createv(clog, 0, NULL, NULL,
1711: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1712: CTLTYPE_INT, "auto_flowlabel",
1713: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1714: NULL, 0, &ip6_auto_flowlabel, 0,
1715: CTL_NET, PF_INET6, IPPROTO_IPV6,
1716: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1717: sysctl_createv(clog, 0, NULL, NULL,
1718: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1719: CTLTYPE_INT, "defmcasthlim",
1720: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1721: NULL, 0, &ip6_defmcasthlim, 0,
1722: CTL_NET, PF_INET6, IPPROTO_IPV6,
1723: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.73 atatat 1724: sysctl_createv(clog, 0, NULL, NULL,
1725: CTLFLAG_PERMANENT,
1.74 atatat 1726: CTLTYPE_STRING, "kame_version",
1727: SYSCTL_DESCR("KAME Version"),
1.78 christos 1728: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1729: CTL_NET, PF_INET6, IPPROTO_IPV6,
1730: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1731: sysctl_createv(clog, 0, NULL, NULL,
1732: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1733: CTLTYPE_INT, "use_deprecated",
1734: SYSCTL_DESCR("Allow use of deprecated addresses as "
1735: "source addresses"),
1.70 atatat 1736: NULL, 0, &ip6_use_deprecated, 0,
1737: CTL_NET, PF_INET6, IPPROTO_IPV6,
1738: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1739: sysctl_createv(clog, 0, NULL, NULL,
1740: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1741: CTLTYPE_INT, "rr_prune", NULL,
1742: NULL, 0, &ip6_rr_prune, 0,
1743: CTL_NET, PF_INET6, IPPROTO_IPV6,
1744: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1745: sysctl_createv(clog, 0, NULL, NULL,
1746: CTLFLAG_PERMANENT
1.70 atatat 1747: #ifndef INET6_BINDV6ONLY
1.73 atatat 1748: |CTLFLAG_READWRITE,
1.70 atatat 1749: #endif
1.74 atatat 1750: CTLTYPE_INT, "v6only",
1751: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1752: "to PF_INET sockets"),
1.70 atatat 1753: NULL, 0, &ip6_v6only, 0,
1754: CTL_NET, PF_INET6, IPPROTO_IPV6,
1755: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1756: sysctl_createv(clog, 0, NULL, NULL,
1757: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1758: CTLTYPE_INT, "anonportmin",
1759: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1760: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1761: CTL_NET, PF_INET6, IPPROTO_IPV6,
1762: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1763: sysctl_createv(clog, 0, NULL, NULL,
1764: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1765: CTLTYPE_INT, "anonportmax",
1766: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1767: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1768: CTL_NET, PF_INET6, IPPROTO_IPV6,
1769: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1770: #ifndef IPNOPRIVPORTS
1.73 atatat 1771: sysctl_createv(clog, 0, NULL, NULL,
1772: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1773: CTLTYPE_INT, "lowportmin",
1774: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1775: "to assign"),
1.70 atatat 1776: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1777: CTL_NET, PF_INET6, IPPROTO_IPV6,
1778: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1779: sysctl_createv(clog, 0, NULL, NULL,
1780: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1781: CTLTYPE_INT, "lowportmax",
1782: SYSCTL_DESCR("Highest privileged ephemeral port number "
1783: "to assign"),
1.70 atatat 1784: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1785: CTL_NET, PF_INET6, IPPROTO_IPV6,
1786: IPV6CTL_LOWPORTMAX, CTL_EOL);
1787: #endif /* IPNOPRIVPORTS */
1.73 atatat 1788: sysctl_createv(clog, 0, NULL, NULL,
1789: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.153 christos 1790: CTLTYPE_INT, "auto_linklocal",
1791: SYSCTL_DESCR("Default value of per-interface flag for "
1792: "adding an IPv6 link-local address to "
1793: "interfaces when attached"),
1794: NULL, 0, &ip6_auto_linklocal, 0,
1795: CTL_NET, PF_INET6, IPPROTO_IPV6,
1796: IPV6CTL_AUTO_LINKLOCAL, CTL_EOL);
1797: sysctl_createv(clog, 0, NULL, NULL,
1798: CTLFLAG_PERMANENT|CTLFLAG_READONLY,
1799: CTLTYPE_STRUCT, "addctlpolicy",
1800: SYSCTL_DESCR("Return the current address control"
1801: " policy"),
1802: sysctl_net_inet6_addrctlpolicy, 0, NULL, 0,
1803: CTL_NET, PF_INET6, IPPROTO_IPV6,
1804: IPV6CTL_ADDRCTLPOLICY, CTL_EOL);
1805: sysctl_createv(clog, 0, NULL, NULL,
1806: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1807: CTLTYPE_INT, "use_tempaddr",
1808: SYSCTL_DESCR("Use temporary address"),
1809: NULL, 0, &ip6_use_tempaddr, 0,
1810: CTL_NET, PF_INET6, IPPROTO_IPV6,
1811: CTL_CREATE, CTL_EOL);
1812: sysctl_createv(clog, 0, NULL, NULL,
1813: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.150 roy 1814: CTLTYPE_INT, "prefer_tempaddr",
1815: SYSCTL_DESCR("Prefer temporary address as source "
1816: "address"),
1817: NULL, 0, &ip6_prefer_tempaddr, 0,
1818: CTL_NET, PF_INET6, IPPROTO_IPV6,
1819: CTL_CREATE, CTL_EOL);
1820: sysctl_createv(clog, 0, NULL, NULL,
1821: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1822: CTLTYPE_INT, "temppltime",
1823: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1824: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1825: CTL_NET, PF_INET6, IPPROTO_IPV6,
1826: CTL_CREATE, CTL_EOL);
1827: sysctl_createv(clog, 0, NULL, NULL,
1828: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1829: CTLTYPE_INT, "tempvltime",
1830: SYSCTL_DESCR("valid lifetime of a temporary address"),
1831: NULL, 0, &ip6_temp_valid_lifetime, 0,
1832: CTL_NET, PF_INET6, IPPROTO_IPV6,
1833: CTL_CREATE, CTL_EOL);
1834: sysctl_createv(clog, 0, NULL, NULL,
1835: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1836: CTLTYPE_INT, "maxfrags",
1837: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1838: NULL, 0, &ip6_maxfrags, 0,
1839: CTL_NET, PF_INET6, IPPROTO_IPV6,
1840: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1841: sysctl_createv(clog, 0, NULL, NULL,
1842: CTLFLAG_PERMANENT,
1843: CTLTYPE_STRUCT, "stats",
1844: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1845: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1846: CTL_NET, PF_INET6, IPPROTO_IPV6,
1847: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1848: sysctl_createv(clog, 0, NULL, NULL,
1849: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1850: CTLTYPE_INT, "use_defaultzone",
1851: SYSCTL_DESCR("Whether to use the default scope zones"),
1852: NULL, 0, &ip6_use_defzone, 0,
1853: CTL_NET, PF_INET6, IPPROTO_IPV6,
1854: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1855: sysctl_createv(clog, 0, NULL, NULL,
1856: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1857: CTLTYPE_INT, "mcast_pmtu",
1858: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1859: NULL, 0, &ip6_mcast_pmtu, 0,
1860: CTL_NET, PF_INET6, IPPROTO_IPV6,
1861: CTL_CREATE, CTL_EOL);
1.138 christos 1862: /* anonportalgo RFC6056 subtree */
1.140 christos 1863: const struct sysctlnode *portalgo_node;
1864: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1865: CTLFLAG_PERMANENT,
1866: CTLTYPE_NODE, "anonportalgo",
1867: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1868: NULL, 0, NULL, 0,
1869: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1870: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1871: CTLFLAG_PERMANENT,
1872: CTLTYPE_STRING, "available",
1873: SYSCTL_DESCR("available algorithms"),
1.140 christos 1874: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1875: CTL_CREATE, CTL_EOL);
1.140 christos 1876: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1877: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1878: CTLTYPE_STRING, "selected",
1879: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1880: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1881: CTL_CREATE, CTL_EOL);
1.141 christos 1882: sysctl_createv(clog, 0, &portalgo_node, NULL,
1883: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1884: CTLTYPE_STRUCT, "reserve",
1885: SYSCTL_DESCR("bitmap of reserved ports"),
1886: sysctl_portalgo_reserve6, 0, NULL, 0,
1887: CTL_CREATE, CTL_EOL);
1.139 christos 1888: sysctl_createv(clog, 0, NULL, NULL,
1889: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1890: CTLTYPE_INT, "neighborgcthresh",
1891: SYSCTL_DESCR("Maximum number of entries in neighbor"
1892: " cache"),
1893: NULL, 1, &ip6_neighborgcthresh, 0,
1894: CTL_NET, PF_INET6, IPPROTO_IPV6,
1895: CTL_CREATE, CTL_EOL);
1896: sysctl_createv(clog, 0, NULL, NULL,
1897: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1898: CTLTYPE_INT, "maxifprefixes",
1899: SYSCTL_DESCR("Maximum number of prefixes created by"
1900: " route advertisement per interface"),
1901: NULL, 1, &ip6_maxifprefixes, 0,
1902: CTL_NET, PF_INET6, IPPROTO_IPV6,
1903: CTL_CREATE, CTL_EOL);
1904: sysctl_createv(clog, 0, NULL, NULL,
1905: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1906: CTLTYPE_INT, "maxifdefrouters",
1907: SYSCTL_DESCR("Maximum number of default routers created"
1908: " by route advertisement per interface"),
1909: NULL, 1, &ip6_maxifdefrouters, 0,
1910: CTL_NET, PF_INET6, IPPROTO_IPV6,
1911: CTL_CREATE, CTL_EOL);
1912: sysctl_createv(clog, 0, NULL, NULL,
1913: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1914: CTLTYPE_INT, "maxdynroutes",
1915: SYSCTL_DESCR("Maximum number of routes created via"
1916: " redirect"),
1917: NULL, 1, &ip6_maxdynroutes, 0,
1918: CTL_NET, PF_INET6, IPPROTO_IPV6,
1919: CTL_CREATE, CTL_EOL);
1.2 itojun 1920: }
1.116 thorpej 1921:
1922: void
1923: ip6_statinc(u_int stat)
1924: {
1925:
1926: KASSERT(stat < IP6_NSTATS);
1927: IP6_STATINC(stat);
1928: }
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