Annotation of src/sys/netinet6/ip6_input.c, Revision 1.205
1.205 ! maxv 1: /* $NetBSD: ip6_input.c,v 1.204 2018/05/19 06:44:08 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>
1.205 ! maxv 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.204 2018/05/19 06:44:08 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:
126: extern struct domain inet6domain;
127:
128: u_char ip6_protox[IPPROTO_MAX];
1.148 rmind 129: pktqueue_t *ip6_pktq __read_mostly;
1.2 itojun 130:
1.143 rmind 131: pfil_head_t *inet6_pfil_hook;
1.29 thorpej 132:
1.116 thorpej 133: percpu_t *ip6stat_percpu;
1.2 itojun 134:
1.167 ozaki-r 135: percpu_t *ip6_forward_rt_percpu __cacheline_aligned;
136:
1.156 ozaki-r 137: static void ip6_init2(void);
1.148 rmind 138: static void ip6intr(void *);
1.199 maxv 139: static bool ip6_badaddr(struct ip6_hdr *);
1.112 dyoung 140: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 141:
1.136 drochner 142: static int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
1.189 maxv 143: u_int32_t *);
1.111 dyoung 144: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.128 pooka 145: static void sysctl_net_inet6_ip6_setup(struct sysctllog **);
1.2 itojun 146:
1.169 ozaki-r 147: #ifdef NET_MPSAFE
148: #define SOFTNET_LOCK() mutex_enter(softnet_lock)
149: #define SOFTNET_UNLOCK() mutex_exit(softnet_lock)
150: #else
151: #define SOFTNET_LOCK() KASSERT(mutex_owned(softnet_lock))
152: #define SOFTNET_UNLOCK() KASSERT(mutex_owned(softnet_lock))
153: #endif
154:
1.2 itojun 155: /*
156: * IP6 initialization: fill in IP6 protocol switch table.
157: * All protocols not implemented in kernel go to raw IP6 protocol handler.
158: */
159: void
1.114 matt 160: ip6_init(void)
1.2 itojun 161: {
1.78 christos 162: const struct ip6protosw *pr;
1.35 itojun 163: int i;
1.2 itojun 164:
1.163 ozaki-r 165: in6_init();
1.162 ozaki-r 166:
1.128 pooka 167: sysctl_net_inet6_ip6_setup(NULL);
1.78 christos 168: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 169: if (pr == 0)
170: panic("ip6_init");
171: for (i = 0; i < IPPROTO_MAX; i++)
172: ip6_protox[i] = pr - inet6sw;
1.78 christos 173: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
174: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 175: if (pr->pr_domain->dom_family == PF_INET6 &&
176: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
177: ip6_protox[pr->pr_protocol] = pr - inet6sw;
1.148 rmind 178:
1.149 ozaki-r 179: ip6_pktq = pktq_create(IFQ_MAXLEN, ip6intr, NULL);
1.148 rmind 180: KASSERT(ip6_pktq != NULL);
181:
1.81 rpaulo 182: scope6_init();
183: addrsel_policy_init();
1.2 itojun 184: nd6_init();
185: frag6_init();
1.133 tls 186: ip6_desync_factor = cprng_fast32() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 187:
1.156 ozaki-r 188: ip6_init2();
1.98 liamjfoy 189: #ifdef GATEWAY
1.99 liamjfoy 190: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 191: #endif
1.29 thorpej 192: /* Register our Packet Filter hook. */
1.143 rmind 193: inet6_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET6);
194: KASSERT(inet6_pfil_hook != NULL);
1.116 thorpej 195:
196: ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS);
1.167 ozaki-r 197: ip6_forward_rt_percpu = percpu_alloc(sizeof(struct route));
1.2 itojun 198: }
199:
200: static void
1.156 ozaki-r 201: ip6_init2(void)
1.2 itojun 202: {
203:
1.186 maxv 204: /* timer for regeneration of temporary addresses randomize ID */
1.118 ad 205: callout_init(&in6_tmpaddrtimer_ch, CALLOUT_MPSAFE);
1.83 rpaulo 206: callout_reset(&in6_tmpaddrtimer_ch,
207: (ip6_temp_preferred_lifetime - ip6_desync_factor -
208: ip6_temp_regen_advance) * hz,
209: in6_tmpaddrtimer, NULL);
1.2 itojun 210: }
211:
212: /*
213: * IP6 input interrupt handling. Just pass the packet to ip6_input.
214: */
1.148 rmind 215: static void
216: ip6intr(void *arg __unused)
1.2 itojun 217: {
218: struct mbuf *m;
219:
1.193 ozaki-r 220: SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE();
1.148 rmind 221: while ((m = pktq_dequeue(ip6_pktq)) != NULL) {
1.160 ozaki-r 222: struct psref psref;
223: struct ifnet *rcvif = m_get_rcvif_psref(m, &psref);
1.148 rmind 224:
1.160 ozaki-r 225: if (rcvif == NULL) {
226: m_freem(m);
227: continue;
228: }
1.148 rmind 229: /*
230: * Drop the packet if IPv6 is disabled on the interface.
231: */
1.160 ozaki-r 232: if ((ND_IFINFO(rcvif)->flags & ND6_IFF_IFDISABLED)) {
233: m_put_rcvif_psref(rcvif, &psref);
1.83 rpaulo 234: m_freem(m);
1.148 rmind 235: continue;
1.83 rpaulo 236: }
1.160 ozaki-r 237: ip6_input(m, rcvif);
238: m_put_rcvif_psref(rcvif, &psref);
1.2 itojun 239: }
1.193 ozaki-r 240: SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE();
1.2 itojun 241: }
242:
243: void
1.160 ozaki-r 244: ip6_input(struct mbuf *m, struct ifnet *rcvif)
1.2 itojun 245: {
1.9 itojun 246: struct ip6_hdr *ip6;
1.105 dyoung 247: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 248: u_int32_t plen;
1.5 itojun 249: u_int32_t rtalert = ~0;
1.188 maxv 250: int nxt, ours = 0, rh_present = 0, frg_present;
1.9 itojun 251: struct ifnet *deliverifp = NULL;
1.64 itojun 252: int srcrt = 0;
1.171 ozaki-r 253: struct rtentry *rt = NULL;
1.105 dyoung 254: union {
255: struct sockaddr dst;
256: struct sockaddr_in6 dst6;
257: } u;
1.167 ozaki-r 258: struct route *ro;
1.2 itojun 259:
1.186 maxv 260: KASSERT(rcvif != NULL);
261:
1.2 itojun 262: /*
1.81 rpaulo 263: * make sure we don't have onion peering information into m_tag.
264: */
265: ip6_delaux(m);
266:
267: /*
1.44 itojun 268: * mbuf statistics
1.2 itojun 269: */
270: if (m->m_flags & M_EXT) {
271: if (m->m_next)
1.116 thorpej 272: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 273: else
1.116 thorpej 274: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 275: } else {
1.115 thorpej 276: #define M2MMAX 32
1.2 itojun 277: if (m->m_next) {
1.159 ozaki-r 278: if (m->m_flags & M_LOOP)
1.116 thorpej 279: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.159 ozaki-r 280: else if (rcvif->if_index < M2MMAX)
281: IP6_STATINC(IP6_STAT_M2M + rcvif->if_index);
282: else
1.116 thorpej 283: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 284: } else
1.116 thorpej 285: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 286: #undef M2MMAX
1.2 itojun 287: }
288:
1.159 ozaki-r 289: in6_ifstat_inc(rcvif, ifs6_in_receive);
1.116 thorpej 290: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 291:
1.57 thorpej 292: /*
293: * If the IPv6 header is not aligned, slurp it up into a new
294: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 295: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 296: * IPv6 header is in the first mbuf of the chain.
297: */
1.97 christos 298: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 299: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
1.186 maxv 300: (max_linkhdr + 3) & ~3)) == NULL) {
1.57 thorpej 301: /* XXXJRT new stat, please */
1.116 thorpej 302: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 303: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.57 thorpej 304: return;
305: }
306: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
1.55 itojun 307: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 308: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 309: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.9 itojun 310: return;
311: }
1.2 itojun 312: }
313:
314: ip6 = mtod(m, struct ip6_hdr *);
315:
316: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 317: IP6_STATINC(IP6_STAT_BADVERS);
1.159 ozaki-r 318: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 319: goto bad;
320: }
1.15 darrenr 321:
1.199 maxv 322: if (ip6_badaddr(ip6)) {
1.194 maxv 323: IP6_STATINC(IP6_STAT_BADSCOPE);
324: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
325: goto bad;
326: }
327:
328: /*
1.98 liamjfoy 329: * Assume that we can create a fast-forward IP flow entry
330: * based on this packet.
331: */
332: m->m_flags |= M_CANFASTFWD;
333:
1.15 darrenr 334: /*
335: * Run through list of hooks for input packets. If there are any
336: * filters which require that additional packets in the flow are
337: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
338: * Note that filters must _never_ set this flag, as another filter
339: * in the list may have previously cleared it.
1.196 maxv 340: *
341: * Don't call hooks if the packet has already been processed by
342: * IPsec (encapsulated, tunnel mode).
1.39 itojun 343: */
1.142 christos 344: #if defined(IPSEC)
1.146 christos 345: if (!ipsec_used || !ipsec_indone(m))
1.39 itojun 346: #else
347: if (1)
348: #endif
349: {
1.64 itojun 350: struct in6_addr odst;
351:
352: odst = ip6->ip6_dst;
1.159 ozaki-r 353: if (pfil_run_hooks(inet6_pfil_hook, &m, rcvif, PFIL_IN) != 0)
1.39 itojun 354: return;
355: if (m == NULL)
356: return;
1.203 maxv 357: KASSERT(m->m_len >= sizeof(struct ip6_hdr));
1.39 itojun 358: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 359: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 360: }
1.15 darrenr 361:
1.116 thorpej 362: IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt);
1.2 itojun 363:
1.30 thorpej 364: #ifdef ALTQ
1.169 ozaki-r 365: if (altq_input != NULL) {
366: SOFTNET_LOCK();
367: if ((*altq_input)(m, AF_INET6) == 0) {
368: SOFTNET_UNLOCK();
369: /* packet is dropped by traffic conditioner */
370: return;
371: }
372: SOFTNET_UNLOCK();
1.9 itojun 373: }
374: #endif
375:
1.2 itojun 376: /*
1.82 yamt 377: * Disambiguate address scope zones (if there is ambiguity).
378: * We first make sure that the original source or destination address
379: * is not in our internal form for scoped addresses. Such addresses
380: * are not necessarily invalid spec-wise, but we cannot accept them due
381: * to the usage conflict.
382: * in6_setscope() then also checks and rejects the cases where src or
383: * dst are the loopback address and the receiving interface
1.186 maxv 384: * is not loopback.
1.82 yamt 385: */
1.88 bouyer 386: if (__predict_false(
387: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
388: goto bad;
389: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 390: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 391: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 392: goto bad;
393: }
1.159 ozaki-r 394: if (in6_setscope(&ip6->ip6_src, rcvif, NULL) ||
395: in6_setscope(&ip6->ip6_dst, rcvif, NULL)) {
1.116 thorpej 396: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 397: goto bad;
398: }
399:
1.171 ozaki-r 400: ro = percpu_getref(ip6_forward_rt_percpu);
1.186 maxv 401:
1.82 yamt 402: /*
1.2 itojun 403: * Multicast check
404: */
405: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
1.176 ozaki-r 406: bool ingroup;
1.9 itojun 407:
1.159 ozaki-r 408: in6_ifstat_inc(rcvif, ifs6_in_mcast);
1.2 itojun 409: /*
410: * See if we belong to the destination multicast group on the
411: * arrival interface.
412: */
1.176 ozaki-r 413: ingroup = in6_multi_group(&ip6->ip6_dst, rcvif);
1.186 maxv 414: if (ingroup) {
1.2 itojun 415: ours = 1;
1.186 maxv 416: } else if (!ip6_mrouter) {
1.116 thorpej 417: uint64_t *ip6s = IP6_STAT_GETREF();
418: ip6s[IP6_STAT_NOTMEMBER]++;
419: ip6s[IP6_STAT_CANTFORWARD]++;
420: IP6_STAT_PUTREF();
1.159 ozaki-r 421: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.171 ozaki-r 422: goto bad_unref;
1.2 itojun 423: }
1.159 ozaki-r 424: deliverifp = rcvif;
1.2 itojun 425: goto hbhcheck;
426: }
427:
1.105 dyoung 428: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
429:
1.2 itojun 430: /*
1.186 maxv 431: * Unicast check
1.2 itojun 432: */
1.167 ozaki-r 433: rt = rtcache_lookup2(ro, &u.dst, 1, &hit);
1.105 dyoung 434: if (hit)
1.116 thorpej 435: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 436: else
1.116 thorpej 437: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 438:
1.2 itojun 439: /*
440: * Accept the packet if the forwarding interface to the destination
1.186 maxv 441: * (according to the routing table) is the loopback interface,
1.2 itojun 442: * unless the associated route has a gateway.
1.186 maxv 443: *
444: * We don't explicitly match ip6_dst against an interface here. It
445: * is already done in rtcache_lookup2: rt->rt_ifp->if_type will be
446: * IFT_LOOP if the packet is for us.
447: *
1.2 itojun 448: * Note that this approach causes to accept a packet if there is a
449: * route to the loopback interface for the destination of the packet.
450: * But we think it's even useful in some situations, e.g. when using
451: * a special daemon which wants to intercept the packet.
452: */
1.105 dyoung 453: if (rt != NULL &&
454: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
455: rt->rt_ifp->if_type == IFT_LOOP) {
456: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.184 roy 457: int addrok;
458:
1.2 itojun 459: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
460: m->m_flags |= M_ANYCAST6;
1.24 itojun 461: /*
462: * packets to a tentative, duplicated, or somehow invalid
463: * address must not be accepted.
464: */
1.184 roy 465: if (ia6->ia6_flags & IN6_IFF_NOTREADY)
466: addrok = 0;
467: else if (ia6->ia6_flags & IN6_IFF_DETACHED &&
468: !IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src))
469: {
470: /* Allow internal traffic to DETACHED addresses */
471: struct sockaddr_in6 sin6;
472: int s;
473:
474: memset(&sin6, 0, sizeof(sin6));
475: sin6.sin6_family = AF_INET6;
476: sin6.sin6_len = sizeof(sin6);
477: sin6.sin6_addr = ip6->ip6_src;
478: s = pserialize_read_enter();
479: addrok = (ifa_ifwithaddr(sin6tosa(&sin6)) != NULL);
480: pserialize_read_exit(s);
481: } else
1.185 kre 482: addrok = 1;
1.184 roy 483: if (addrok) {
1.24 itojun 484: /* this address is ready */
1.2 itojun 485: ours = 1;
1.9 itojun 486: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 487: goto hbhcheck;
488: } else {
1.24 itojun 489: /* address is not ready, so discard the packet. */
1.172 ryo 490: char ip6bufs[INET6_ADDRSTRLEN];
491: char ip6bufd[INET6_ADDRSTRLEN];
1.157 ozaki-r 492: nd6log(LOG_INFO, "packet to an unready address %s->%s\n",
1.173 christos 493: IN6_PRINT(ip6bufs, &ip6->ip6_src),
494: IN6_PRINT(ip6bufd, &ip6->ip6_dst));
1.24 itojun 495:
1.171 ozaki-r 496: goto bad_unref;
1.2 itojun 497: }
498: }
499:
500: /*
1.55 itojun 501: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 502: */
503: #if defined(NFAITH) && 0 < NFAITH
504: if (ip6_keepfaith) {
1.105 dyoung 505: if (rt != NULL && rt->rt_ifp != NULL &&
506: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 507: /* XXX do we need more sanity checks? */
508: ours = 1;
1.105 dyoung 509: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 510: goto hbhcheck;
511: }
512: }
513: #endif
514:
1.2 itojun 515: /*
516: * Now there is no reason to process the packet if it's not our own
517: * and we're not a router.
518: */
519: if (!ip6_forwarding) {
1.116 thorpej 520: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.159 ozaki-r 521: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.171 ozaki-r 522: goto bad_unref;
1.2 itojun 523: }
524:
1.186 maxv 525: hbhcheck:
1.2 itojun 526: /*
1.186 maxv 527: * Record address information into m_tag, if we don't have one yet.
528: * Note that we are unable to record it, if the address is not listed
1.81 rpaulo 529: * as our interface address (e.g. multicast addresses, addresses
530: * within FAITH prefixes and such).
531: */
1.111 dyoung 532: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 533: struct in6_ifaddr *ia6;
1.165 ozaki-r 534: int s = pserialize_read_enter();
1.81 rpaulo 535:
536: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.165 ozaki-r 537: /* Depends on ip6_setdstifaddr never sleep */
1.111 dyoung 538: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
539: /*
540: * XXX maybe we should drop the packet here,
541: * as we could not provide enough information
542: * to the upper layers.
543: */
1.81 rpaulo 544: }
1.165 ozaki-r 545: pserialize_read_exit(s);
1.81 rpaulo 546: }
547:
548: /*
1.2 itojun 549: * Process Hop-by-Hop options header if it's contained.
550: * m may be modified in ip6_hopopts_input().
551: * If a JumboPayload option is included, plen will also be modified.
552: */
553: plen = (u_int32_t)ntohs(ip6->ip6_plen);
554: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 555: struct ip6_hbh *hbh;
556:
557: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
1.186 maxv 558: /* m already freed */
1.159 ozaki-r 559: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.171 ozaki-r 560: rtcache_unref(rt, ro);
561: percpu_putref(ip6_forward_rt_percpu);
1.186 maxv 562: return;
1.9 itojun 563: }
1.22 itojun 564:
1.2 itojun 565: /* adjust pointer */
566: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 567:
568: /*
1.49 itojun 569: * if the payload length field is 0 and the next header field
1.22 itojun 570: * indicates Hop-by-Hop Options header, then a Jumbo Payload
571: * option MUST be included.
572: */
573: if (ip6->ip6_plen == 0 && plen == 0) {
574: /*
575: * Note that if a valid jumbo payload option is
1.83 rpaulo 576: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 577: * (non-zero) payload length to the variable plen.
1.22 itojun 578: */
1.116 thorpej 579: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.159 ozaki-r 580: in6_ifstat_inc(rcvif, ifs6_in_discard);
581: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.22 itojun 582: icmp6_error(m, ICMP6_PARAM_PROB,
583: ICMP6_PARAMPROB_HEADER,
1.97 christos 584: (char *)&ip6->ip6_plen - (char *)ip6);
1.171 ozaki-r 585: rtcache_unref(rt, ro);
586: percpu_putref(ip6_forward_rt_percpu);
1.22 itojun 587: return;
588: }
1.9 itojun 589: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
590: sizeof(struct ip6_hbh));
591: if (hbh == NULL) {
1.116 thorpej 592: IP6_STATINC(IP6_STAT_TOOSHORT);
1.171 ozaki-r 593: rtcache_unref(rt, ro);
594: percpu_putref(ip6_forward_rt_percpu);
1.9 itojun 595: return;
596: }
1.57 thorpej 597: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 598: nxt = hbh->ip6h_nxt;
1.2 itojun 599:
600: /*
601: * accept the packet if a router alert option is included
602: * and we act as an IPv6 router.
603: */
1.5 itojun 604: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 605: ours = 1;
606: } else
607: nxt = ip6->ip6_nxt;
608:
609: /*
1.186 maxv 610: * Check that the amount of data in the buffers is at least much as
611: * the IPv6 header would have us expect. Trim mbufs if longer than we
612: * expect. Drop packet if shorter than we expect.
1.2 itojun 613: */
614: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 615: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 616: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.171 ozaki-r 617: goto bad_unref;
1.2 itojun 618: }
619: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
620: if (m->m_len == m->m_pkthdr.len) {
621: m->m_len = sizeof(struct ip6_hdr) + plen;
622: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
623: } else
624: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
625: }
626:
627: /*
628: * Forward if desirable.
629: */
630: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
631: /*
632: * If we are acting as a multicast router, all
633: * incoming multicast packets are passed to the
634: * kernel-level multicast forwarding function.
635: * The packet is returned (relatively) intact; if
636: * ip6_mforward() returns a non-zero value, the packet
637: * must be discarded, else it may be accepted below.
638: */
1.169 ozaki-r 639: if (ip6_mrouter != NULL) {
640: int error;
641:
642: SOFTNET_LOCK();
643: error = ip6_mforward(ip6, rcvif, m);
644: SOFTNET_UNLOCK();
645:
646: if (error != 0) {
1.171 ozaki-r 647: rtcache_unref(rt, ro);
648: percpu_putref(ip6_forward_rt_percpu);
1.169 ozaki-r 649: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.170 ozaki-r 650: goto bad;
1.169 ozaki-r 651: }
1.2 itojun 652: }
1.170 ozaki-r 653: if (!ours)
1.171 ozaki-r 654: goto bad_unref;
1.22 itojun 655: } else if (!ours) {
1.171 ozaki-r 656: rtcache_unref(rt, ro);
657: percpu_putref(ip6_forward_rt_percpu);
1.64 itojun 658: ip6_forward(m, srcrt);
1.2 itojun 659: return;
1.56 itojun 660: }
1.25 itojun 661:
662: ip6 = mtod(m, struct ip6_hdr *);
663:
664: /*
665: * Malicious party may be able to use IPv4 mapped addr to confuse
666: * tcp/udp stack and bypass security checks (act as if it was from
667: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
668: *
669: * For SIIT end node behavior, you may want to disable the check.
670: * However, you will become vulnerable to attacks using IPv4 mapped
671: * source.
672: */
673: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
674: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 675: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 676: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.171 ozaki-r 677: goto bad_unref;
1.25 itojun 678: }
1.2 itojun 679:
1.12 itojun 680: #ifdef IFA_STATS
1.28 itojun 681: if (deliverifp != NULL) {
1.9 itojun 682: struct in6_ifaddr *ia6;
1.165 ozaki-r 683: int s = pserialize_read_enter();
1.9 itojun 684: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
685: if (ia6)
686: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
1.165 ozaki-r 687: pserialize_read_exit(s);
1.9 itojun 688: }
689: #endif
1.116 thorpej 690: IP6_STATINC(IP6_STAT_DELIVERED);
1.9 itojun 691: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 692: nest = 0;
1.40 itojun 693:
1.171 ozaki-r 694: if (rt != NULL) {
695: rtcache_unref(rt, ro);
696: rt = NULL;
697: }
698: percpu_putref(ip6_forward_rt_percpu);
699:
1.104 yamt 700: rh_present = 0;
1.188 maxv 701: frg_present = 0;
1.2 itojun 702: while (nxt != IPPROTO_DONE) {
703: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.116 thorpej 704: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.159 ozaki-r 705: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 706: goto bad;
707: }
1.8 itojun 708:
1.197 maxv 709: M_VERIFY_PACKET(m);
710:
1.8 itojun 711: /*
712: * protection against faulty packet - there should be
713: * more sanity checks in header chain processing.
714: */
715: if (m->m_pkthdr.len < off) {
1.116 thorpej 716: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 717: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.8 itojun 718: goto bad;
719: }
720:
1.104 yamt 721: if (nxt == IPPROTO_ROUTING) {
722: if (rh_present++) {
1.159 ozaki-r 723: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.116 thorpej 724: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 725: goto bad;
726: }
1.188 maxv 727: } else if (nxt == IPPROTO_FRAGMENT) {
728: if (frg_present++) {
729: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
730: IP6_STATINC(IP6_STAT_BADOPTIONS);
731: goto bad;
732: }
1.104 yamt 733: }
734:
1.142 christos 735: #ifdef IPSEC
1.146 christos 736: if (ipsec_used) {
1.94 degroote 737: /*
1.186 maxv 738: * Enforce IPsec policy checking if we are seeing last
739: * header. Note that we do not visit this with
1.146 christos 740: * protocols with pcb layer code - like udp/tcp/raw ip.
1.94 degroote 741: */
1.146 christos 742: if ((inet6sw[ip_protox[nxt]].pr_flags
743: & PR_LASTHDR) != 0) {
1.169 ozaki-r 744: int error;
745:
1.202 maxv 746: error = ipsec_ip_input(m, false);
1.146 christos 747: if (error)
748: goto bad;
749: }
1.94 degroote 750: }
1.186 maxv 751: #endif
1.94 degroote 752:
1.2 itojun 753: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
754: }
755: return;
1.171 ozaki-r 756:
1.186 maxv 757: bad_unref:
1.171 ozaki-r 758: rtcache_unref(rt, ro);
759: percpu_putref(ip6_forward_rt_percpu);
1.186 maxv 760: bad:
1.2 itojun 761: m_freem(m);
1.171 ozaki-r 762: return;
1.2 itojun 763: }
764:
1.199 maxv 765: static bool
766: ip6_badaddr(struct ip6_hdr *ip6)
767: {
768: /* Check against address spoofing/corruption. */
769: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
770: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
771: return true;
772: }
773:
774: /*
775: * The following check is not documented in specs. A malicious
776: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
777: * and bypass security checks (act as if it was from 127.0.0.1 by using
778: * IPv6 src ::ffff:127.0.0.1). Be cautious.
779: *
780: * This check chokes if we are in an SIIT cloud. As none of BSDs
781: * support IPv4-less kernel compilation, we cannot support SIIT
782: * environment at all. So, it makes more sense for us to reject any
783: * malicious packets for non-SIIT environment, than try to do a
784: * partial support for SIIT environment.
785: */
786: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
787: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
788: return true;
789: }
790:
791: /*
792: * Reject packets with IPv4-compatible IPv6 addresses (RFC4291).
793: */
794: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
795: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
796: return true;
797: }
798:
799: return false;
800: }
801:
1.2 itojun 802: /*
1.81 rpaulo 803: * set/grab in6_ifaddr correspond to IPv6 destination address.
804: */
805: static struct m_tag *
1.112 dyoung 806: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 807: {
808: struct m_tag *mtag;
1.144 christos 809: struct ip6aux *ip6a;
1.81 rpaulo 810:
811: mtag = ip6_addaux(m);
1.144 christos 812: if (mtag == NULL)
813: return NULL;
1.112 dyoung 814:
1.144 christos 815: ip6a = (struct ip6aux *)(mtag + 1);
816: if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) {
817: IP6_STATINC(IP6_STAT_BADSCOPE);
818: return NULL;
1.112 dyoung 819: }
1.144 christos 820:
821: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
822: ip6a->ip6a_flags = ia->ia6_flags;
823: return mtag;
1.81 rpaulo 824: }
825:
1.112 dyoung 826: const struct ip6aux *
1.107 christos 827: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 828: {
829: struct m_tag *mtag;
830:
831: mtag = ip6_findaux(m);
1.112 dyoung 832: if (mtag != NULL)
833: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 834: else
835: return NULL;
836: }
837:
838: /*
1.2 itojun 839: * Hop-by-Hop options header processing. If a valid jumbo payload option is
840: * included, the real payload length will be stored in plenp.
1.107 christos 841: *
842: * rtalertp - XXX: should be stored more smart way
1.2 itojun 843: */
1.136 drochner 844: int
1.107 christos 845: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
846: struct mbuf **mp, int *offp)
1.2 itojun 847: {
1.35 itojun 848: struct mbuf *m = *mp;
1.2 itojun 849: int off = *offp, hbhlen;
850: struct ip6_hbh *hbh;
851:
852: /* validation of the length of the header */
1.9 itojun 853: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
1.189 maxv 854: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
1.9 itojun 855: if (hbh == NULL) {
1.116 thorpej 856: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 857: return -1;
858: }
859: hbhlen = (hbh->ip6h_len + 1) << 3;
860: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
1.189 maxv 861: hbhlen);
1.9 itojun 862: if (hbh == NULL) {
1.116 thorpej 863: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 864: return -1;
865: }
1.57 thorpej 866: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 867: off += hbhlen;
868: hbhlen -= sizeof(struct ip6_hbh);
869:
870: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
1.189 maxv 871: hbhlen, rtalertp, plenp) < 0)
872: return -1;
1.2 itojun 873:
874: *offp = off;
875: *mp = m;
1.189 maxv 876: return 0;
1.2 itojun 877: }
878:
879: /*
880: * Search header for all Hop-by-hop options and process each option.
881: * This function is separate from ip6_hopopts_input() in order to
882: * handle a case where the sending node itself process its hop-by-hop
883: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 884: *
885: * The function assumes that hbh header is located right after the IPv6 header
886: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
887: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 888: */
1.136 drochner 889: static int
1.107 christos 890: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
891: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 892: {
893: struct ip6_hdr *ip6;
894: int optlen = 0;
895: u_int8_t *opt = opthead;
896: u_int16_t rtalert_val;
1.22 itojun 897: u_int32_t jumboplen;
1.55 itojun 898: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 899:
900: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 901: switch (*opt) {
902: case IP6OPT_PAD1:
903: optlen = 1;
904: break;
905: case IP6OPT_PADN:
906: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 907: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 908: goto bad;
909: }
910: optlen = *(opt + 1) + 2;
911: break;
912: case IP6OPT_RTALERT:
913: /* XXX may need check for alignment */
914: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 915: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 916: goto bad;
917: }
918: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 919: /* XXX stat */
920: icmp6_error(m, ICMP6_PARAM_PROB,
921: ICMP6_PARAMPROB_HEADER,
922: erroff + opt + 1 - opthead);
923: return (-1);
1.35 itojun 924: }
925: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 926: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 927: *rtalertp = ntohs(rtalert_val);
928: break;
929: case IP6OPT_JUMBO:
1.22 itojun 930: /* XXX may need check for alignment */
931: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 932: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 933: goto bad;
934: }
1.35 itojun 935: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 936: /* XXX stat */
937: icmp6_error(m, ICMP6_PARAM_PROB,
938: ICMP6_PARAMPROB_HEADER,
939: erroff + opt + 1 - opthead);
940: return (-1);
1.35 itojun 941: }
1.22 itojun 942: optlen = IP6OPT_JUMBO_LEN;
943:
944: /*
945: * IPv6 packets that have non 0 payload length
1.35 itojun 946: * must not contain a jumbo payload option.
1.22 itojun 947: */
948: ip6 = mtod(m, struct ip6_hdr *);
949: if (ip6->ip6_plen) {
1.116 thorpej 950: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 951: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 952: ICMP6_PARAMPROB_HEADER,
953: erroff + opt - opthead);
954: return (-1);
1.22 itojun 955: }
1.2 itojun 956:
1.22 itojun 957: /*
958: * We may see jumbolen in unaligned location, so
1.191 maxv 959: * we'd need to perform memcpy().
1.22 itojun 960: */
1.126 tsutsui 961: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 962: jumboplen = (u_int32_t)htonl(jumboplen);
963:
964: #if 1
965: /*
966: * if there are multiple jumbo payload options,
967: * *plenp will be non-zero and the packet will be
968: * rejected.
969: * the behavior may need some debate in ipngwg -
970: * multiple options does not make sense, however,
971: * there's no explicit mention in specification.
972: */
973: if (*plenp != 0) {
1.116 thorpej 974: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 975: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 976: ICMP6_PARAMPROB_HEADER,
977: erroff + opt + 2 - opthead);
978: return (-1);
1.22 itojun 979: }
1.8 itojun 980: #endif
1.2 itojun 981:
1.22 itojun 982: /*
983: * jumbo payload length must be larger than 65535.
984: */
985: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 986: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 987: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 988: ICMP6_PARAMPROB_HEADER,
989: erroff + opt + 2 - opthead);
990: return (-1);
1.22 itojun 991: }
992: *plenp = jumboplen;
993:
994: break;
1.35 itojun 995: default: /* unknown option */
996: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 997: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 998: goto bad;
999: }
1.55 itojun 1000: optlen = ip6_unknown_opt(opt, m,
1001: erroff + opt - opthead);
1002: if (optlen == -1)
1003: return (-1);
1.35 itojun 1004: optlen += 2;
1005: break;
1.2 itojun 1006: }
1007: }
1008:
1.55 itojun 1009: return (0);
1.2 itojun 1010:
1011: bad:
1012: m_freem(m);
1.55 itojun 1013: return (-1);
1.2 itojun 1014: }
1015:
1016: /*
1017: * Unknown option processing.
1018: * The third argument `off' is the offset from the IPv6 header to the option,
1019: * which is necessary if the IPv6 header the and option header and IPv6 header
1020: * is not continuous in order to return an ICMPv6 error.
1021: */
1022: int
1.107 christos 1023: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1024: {
1025: struct ip6_hdr *ip6;
1026:
1.35 itojun 1027: switch (IP6OPT_TYPE(*optp)) {
1028: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1029: return ((int)*(optp + 1));
1.35 itojun 1030: case IP6OPT_TYPE_DISCARD: /* silently discard */
1031: m_freem(m);
1.58 itojun 1032: return (-1);
1.35 itojun 1033: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 1034: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1035: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1036: return (-1);
1.35 itojun 1037: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 1038: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1039: ip6 = mtod(m, struct ip6_hdr *);
1040: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1041: (m->m_flags & (M_BCAST|M_MCAST)))
1042: m_freem(m);
1043: else
1044: icmp6_error(m, ICMP6_PARAM_PROB,
1045: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1046: return (-1);
1.2 itojun 1047: }
1048:
1049: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1050: return (-1);
1.2 itojun 1051: }
1052:
1053: void
1.107 christos 1054: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1055: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1056: {
1.179 christos 1057: struct socket *so = in6p->in6p_socket;
1.85 rpaulo 1058: #ifdef RFC2292
1059: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1060: #else
1061: #define IS2292(x, y) (y)
1062: #endif
1063:
1.179 christos 1064: if (SOOPT_TIMESTAMP(so->so_options))
1.200 maxv 1065: mp = sbsavetimestamp(so->so_options, mp);
1.87 rpaulo 1066:
1067: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1068: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1069: return;
1070:
1.2 itojun 1071: /* RFC 2292 sec. 5 */
1.35 itojun 1072: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1073: struct in6_pktinfo pi6;
1.85 rpaulo 1074:
1.126 tsutsui 1075: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1076: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.160 ozaki-r 1077: pi6.ipi6_ifindex = m->m_pkthdr.rcvif_index;
1.180 christos 1078: *mp = sbcreatecontrol(&pi6, sizeof(pi6),
1.85 rpaulo 1079: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1080: if (*mp)
1081: mp = &(*mp)->m_next;
1082: }
1.85 rpaulo 1083:
1.2 itojun 1084: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1085: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1086:
1.180 christos 1087: *mp = sbcreatecontrol(&hlim, sizeof(hlim),
1.85 rpaulo 1088: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1089: if (*mp)
1090: mp = &(*mp)->m_next;
1091: }
1092:
1093: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1094: u_int32_t flowinfo;
1095: int tclass;
1096:
1097: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1098: flowinfo >>= 20;
1099:
1100: tclass = flowinfo & 0xff;
1.180 christos 1101: *mp = sbcreatecontrol(&tclass, sizeof(tclass),
1.85 rpaulo 1102: IPV6_TCLASS, IPPROTO_IPV6);
1103:
1.2 itojun 1104: if (*mp)
1105: mp = &(*mp)->m_next;
1106: }
1107:
1108: /*
1.75 itojun 1109: * IPV6_HOPOPTS socket option. Recall that we required super-user
1110: * privilege for the option (see ip6_ctloutput), but it might be too
1111: * strict, since there might be some hop-by-hop options which can be
1112: * returned to normal user.
1.85 rpaulo 1113: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1114: */
1.75 itojun 1115: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1116: /*
1117: * Check if a hop-by-hop options header is contatined in the
1118: * received packet, and if so, store the options as ancillary
1119: * data. Note that a hop-by-hop options header must be
1120: * just after the IPv6 header, which fact is assured through
1121: * the IPv6 input processing.
1122: */
1.78 christos 1123: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1124: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1125: struct ip6_hbh *hbh;
1126: int hbhlen;
1.62 itojun 1127: struct mbuf *ext;
1.9 itojun 1128:
1.62 itojun 1129: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1130: xip6->ip6_nxt);
1.62 itojun 1131: if (ext == NULL) {
1.116 thorpej 1132: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1133: return;
1134: }
1.62 itojun 1135: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1136: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1137: if (hbhlen != ext->m_len) {
1138: m_freem(ext);
1.116 thorpej 1139: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1140: return;
1141: }
1.2 itojun 1142:
1143: /*
1144: * XXX: We copy whole the header even if a jumbo
1145: * payload option is included, which option is to
1146: * be removed before returning in the RFC 2292.
1.85 rpaulo 1147: * Note: this constraint is removed in RFC3542.
1.2 itojun 1148: */
1.180 christos 1149: *mp = sbcreatecontrol(hbh, hbhlen,
1.85 rpaulo 1150: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1151: IPPROTO_IPV6);
1.2 itojun 1152: if (*mp)
1153: mp = &(*mp)->m_next;
1.62 itojun 1154: m_freem(ext);
1.2 itojun 1155: }
1156: }
1157:
1158: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1159: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1160: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1161: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1162:
1163: /*
1164: * Search for destination options headers or routing
1165: * header(s) through the header chain, and stores each
1166: * header as ancillary data.
1167: * Note that the order of the headers remains in
1168: * the chain of ancillary data.
1169: */
1.86 rpaulo 1170: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1171: struct ip6_ext *ip6e = NULL;
1.9 itojun 1172: int elen;
1.62 itojun 1173: struct mbuf *ext = NULL;
1.9 itojun 1174:
1.62 itojun 1175: /*
1176: * if it is not an extension header, don't try to
1177: * pull it from the chain.
1178: */
1179: switch (nxt) {
1180: case IPPROTO_DSTOPTS:
1181: case IPPROTO_ROUTING:
1182: case IPPROTO_HOPOPTS:
1183: case IPPROTO_AH: /* is it possible? */
1184: break;
1185: default:
1186: goto loopend;
1187: }
1188:
1189: ext = ip6_pullexthdr(m, off, nxt);
1190: if (ext == NULL) {
1.116 thorpej 1191: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1192: return;
1193: }
1.62 itojun 1194: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1195: if (nxt == IPPROTO_AH)
1196: elen = (ip6e->ip6e_len + 2) << 2;
1197: else
1198: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1199: if (elen != ext->m_len) {
1200: m_freem(ext);
1.116 thorpej 1201: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1202: return;
1203: }
1.57 thorpej 1204: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1205:
1.35 itojun 1206: switch (nxt) {
1.62 itojun 1207: case IPPROTO_DSTOPTS:
1.127 martin 1208: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1209: break;
1210:
1.180 christos 1211: *mp = sbcreatecontrol(ip6e, elen,
1.85 rpaulo 1212: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1213: IPPROTO_IPV6);
1.35 itojun 1214: if (*mp)
1215: mp = &(*mp)->m_next;
1216: break;
1217:
1218: case IPPROTO_ROUTING:
1.127 martin 1219: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1220: break;
1221:
1.180 christos 1222: *mp = sbcreatecontrol(ip6e, elen,
1.85 rpaulo 1223: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1224: IPPROTO_IPV6);
1.35 itojun 1225: if (*mp)
1226: mp = &(*mp)->m_next;
1227: break;
1228:
1.62 itojun 1229: case IPPROTO_HOPOPTS:
1230: case IPPROTO_AH: /* is it possible? */
1231: break;
1232:
1.35 itojun 1233: default:
1234: /*
1.62 itojun 1235: * other cases have been filtered in the above.
1236: * none will visit this case. here we supply
1237: * the code just in case (nxt overwritten or
1238: * other cases).
1.35 itojun 1239: */
1.62 itojun 1240: m_freem(ext);
1.35 itojun 1241: goto loopend;
1242:
1.2 itojun 1243: }
1244:
1245: /* proceed with the next header. */
1.9 itojun 1246: off += elen;
1.2 itojun 1247: nxt = ip6e->ip6e_nxt;
1.62 itojun 1248: ip6e = NULL;
1249: m_freem(ext);
1250: ext = NULL;
1.2 itojun 1251: }
1252: loopend:
1.62 itojun 1253: ;
1.2 itojun 1254: }
1.62 itojun 1255: }
1.85 rpaulo 1256: #undef IS2292
1257:
1258:
1259: void
1.95 dyoung 1260: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1261: uint32_t *mtu)
1.85 rpaulo 1262: {
1263: struct socket *so;
1264: struct mbuf *m_mtu;
1265: struct ip6_mtuinfo mtuctl;
1266:
1267: so = in6p->in6p_socket;
1268:
1269: if (mtu == NULL)
1270: return;
1271:
1.177 ozaki-r 1272: KASSERT(so != NULL);
1.85 rpaulo 1273:
1274: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1275: mtuctl.ip6m_mtu = *mtu;
1276: mtuctl.ip6m_addr = *dst;
1277: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1278: return;
1279:
1.180 christos 1280: if ((m_mtu = sbcreatecontrol(&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1281: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1282: return;
1283:
1.95 dyoung 1284: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1285: == 0) {
1.195 roy 1286: soroverflow(so);
1.85 rpaulo 1287: m_freem(m_mtu);
1288: } else
1289: sorwakeup(so);
1290:
1291: return;
1292: }
1.62 itojun 1293:
1294: /*
1295: * pull single extension header from mbuf chain. returns single mbuf that
1296: * contains the result, or NULL on error.
1297: */
1298: static struct mbuf *
1.107 christos 1299: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1300: {
1301: struct ip6_ext ip6e;
1302: size_t elen;
1303: struct mbuf *n;
1304:
1.97 christos 1305: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1306: if (nxt == IPPROTO_AH)
1307: elen = (ip6e.ip6e_len + 2) << 2;
1308: else
1309: elen = (ip6e.ip6e_len + 1) << 3;
1310:
1311: MGET(n, M_DONTWAIT, MT_DATA);
1312: if (n && elen >= MLEN) {
1313: MCLGET(n, M_DONTWAIT);
1314: if ((n->m_flags & M_EXT) == 0) {
1315: m_free(n);
1316: n = NULL;
1317: }
1318: }
1319: if (!n)
1320: return NULL;
1321:
1322: n->m_len = 0;
1323: if (elen >= M_TRAILINGSPACE(n)) {
1324: m_free(n);
1325: return NULL;
1326: }
1327:
1.97 christos 1328: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1329: n->m_len = elen;
1330: return n;
1.2 itojun 1331: }
1332:
1333: /*
1.187 maxv 1334: * Get offset to the previous header followed by the header
1.2 itojun 1335: * currently processed.
1336: */
1.187 maxv 1337: int
1.107 christos 1338: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1339: {
1340: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1341:
1.187 maxv 1342: if (off == sizeof(struct ip6_hdr)) {
1343: return offsetof(struct ip6_hdr, ip6_nxt);
1344: } else if (off < sizeof(struct ip6_hdr)) {
1345: panic("%s: off < sizeof(struct ip6_hdr)", __func__);
1346: } else {
1347: int len, nlen, nxt;
1348: struct ip6_ext ip6e;
1.2 itojun 1349:
1350: nxt = ip6->ip6_nxt;
1351: len = sizeof(struct ip6_hdr);
1.187 maxv 1352: nlen = 0;
1.2 itojun 1353: while (len < off) {
1.187 maxv 1354: m_copydata(m, len, sizeof(ip6e), &ip6e);
1.2 itojun 1355:
1.35 itojun 1356: switch (nxt) {
1.2 itojun 1357: case IPPROTO_FRAGMENT:
1.187 maxv 1358: nlen = sizeof(struct ip6_frag);
1.2 itojun 1359: break;
1360: case IPPROTO_AH:
1.187 maxv 1361: nlen = (ip6e.ip6e_len + 2) << 2;
1.2 itojun 1362: break;
1363: default:
1.187 maxv 1364: nlen = (ip6e.ip6e_len + 1) << 3;
1.2 itojun 1365: break;
1366: }
1.187 maxv 1367: len += nlen;
1368: nxt = ip6e.ip6e_nxt;
1.2 itojun 1369: }
1.187 maxv 1370:
1371: return (len - nlen);
1.18 itojun 1372: }
1373: }
1374:
1375: /*
1376: * get next header offset. m will be retained.
1377: */
1.192 maxv 1378: int
1.107 christos 1379: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1380: {
1381: struct ip6_hdr ip6;
1382: struct ip6_ext ip6e;
1383: struct ip6_frag fh;
1384:
1385: /* just in case */
1386: if (m == NULL)
1.189 maxv 1387: panic("%s: m == NULL", __func__);
1.18 itojun 1388: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1389: return -1;
1390:
1391: switch (proto) {
1392: case IPPROTO_IPV6:
1.83 rpaulo 1393: /* do not chase beyond intermediate IPv6 headers */
1394: if (off != 0)
1395: return -1;
1.18 itojun 1396: if (m->m_pkthdr.len < off + sizeof(ip6))
1397: return -1;
1.97 christos 1398: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1399: if (nxtp)
1400: *nxtp = ip6.ip6_nxt;
1401: off += sizeof(ip6);
1402: return off;
1403:
1404: case IPPROTO_FRAGMENT:
1405: /*
1406: * terminate parsing if it is not the first fragment,
1407: * it does not make sense to parse through it.
1408: */
1409: if (m->m_pkthdr.len < off + sizeof(fh))
1410: return -1;
1.97 christos 1411: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1412: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1413: return -1;
1414: if (nxtp)
1415: *nxtp = fh.ip6f_nxt;
1416: off += sizeof(struct ip6_frag);
1417: return off;
1418:
1419: case IPPROTO_AH:
1420: if (m->m_pkthdr.len < off + sizeof(ip6e))
1421: return -1;
1.97 christos 1422: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1423: if (nxtp)
1424: *nxtp = ip6e.ip6e_nxt;
1425: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1426: if (m->m_pkthdr.len < off)
1427: return -1;
1.18 itojun 1428: return off;
1429:
1430: case IPPROTO_HOPOPTS:
1431: case IPPROTO_ROUTING:
1432: case IPPROTO_DSTOPTS:
1433: if (m->m_pkthdr.len < off + sizeof(ip6e))
1434: return -1;
1.97 christos 1435: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1436: if (nxtp)
1437: *nxtp = ip6e.ip6e_nxt;
1438: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1439: if (m->m_pkthdr.len < off)
1440: return -1;
1.18 itojun 1441: return off;
1442:
1443: case IPPROTO_NONE:
1444: case IPPROTO_ESP:
1445: case IPPROTO_IPCOMP:
1446: /* give up */
1447: return -1;
1448:
1449: default:
1450: return -1;
1451: }
1452: }
1453:
1454: /*
1455: * get offset for the last header in the chain. m will be kept untainted.
1456: */
1457: int
1.107 christos 1458: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1459: {
1460: int newoff;
1461: int nxt;
1462:
1463: if (!nxtp) {
1464: nxt = -1;
1465: nxtp = &nxt;
1466: }
1.86 rpaulo 1467: for (;;) {
1.18 itojun 1468: newoff = ip6_nexthdr(m, off, proto, nxtp);
1469: if (newoff < 0)
1470: return off;
1471: else if (newoff < off)
1472: return -1; /* invalid */
1473: else if (newoff == off)
1474: return newoff;
1475:
1476: off = newoff;
1477: proto = *nxtp;
1.2 itojun 1478: }
1479: }
1480:
1.81 rpaulo 1481: struct m_tag *
1.107 christos 1482: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1483: {
1484: struct m_tag *mtag;
1485:
1.205 ! maxv 1486: mtag = m_tag_find(m, PACKET_TAG_INET6);
1.81 rpaulo 1487: if (!mtag) {
1488: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1489: M_NOWAIT);
1490: if (mtag) {
1491: m_tag_prepend(m, mtag);
1.124 cegger 1492: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1493: }
1494: }
1495: return mtag;
1496: }
1497:
1498: struct m_tag *
1.107 christos 1499: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1500: {
1501: struct m_tag *mtag;
1502:
1.205 ! maxv 1503: mtag = m_tag_find(m, PACKET_TAG_INET6);
1.81 rpaulo 1504: return mtag;
1505: }
1506:
1507: void
1.107 christos 1508: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1509: {
1510: struct m_tag *mtag;
1511:
1.205 ! maxv 1512: mtag = m_tag_find(m, PACKET_TAG_INET6);
1.81 rpaulo 1513: if (mtag)
1514: m_tag_delete(m, mtag);
1515: }
1516:
1.2 itojun 1517: /*
1518: * System control for IP6
1519: */
1520:
1.120 matt 1521: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1522: 0, 0, 0, 0,
1523: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1524: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1525: EMSGSIZE, EHOSTUNREACH, 0, 0,
1526: 0, 0, 0, 0,
1527: ENOPROTOOPT
1528: };
1529:
1.153 christos 1530: extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS);
1531:
1.116 thorpej 1532: static int
1533: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1534: {
1535:
1.119 thorpej 1536: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1537: }
1538:
1.128 pooka 1539: static void
1540: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1541: {
1.26 itojun 1542:
1.73 atatat 1543: sysctl_createv(clog, 0, NULL, NULL,
1544: CTLFLAG_PERMANENT,
1.74 atatat 1545: CTLTYPE_NODE, "inet6",
1546: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1547: NULL, 0, NULL, 0,
1548: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1549: sysctl_createv(clog, 0, NULL, NULL,
1550: CTLFLAG_PERMANENT,
1.74 atatat 1551: CTLTYPE_NODE, "ip6",
1552: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1553: NULL, 0, NULL, 0,
1554: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1555:
1.73 atatat 1556: sysctl_createv(clog, 0, NULL, NULL,
1557: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1558: CTLTYPE_INT, "forwarding",
1559: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1560: NULL, 0, &ip6_forwarding, 0,
1561: CTL_NET, PF_INET6, IPPROTO_IPV6,
1562: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1563: sysctl_createv(clog, 0, NULL, NULL,
1564: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1565: CTLTYPE_INT, "redirect",
1566: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1567: NULL, 0, &ip6_sendredirects, 0,
1568: CTL_NET, PF_INET6, IPPROTO_IPV6,
1569: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1570: sysctl_createv(clog, 0, NULL, NULL,
1571: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1572: CTLTYPE_INT, "hlim",
1573: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1574: NULL, 0, &ip6_defhlim, 0,
1575: CTL_NET, PF_INET6, IPPROTO_IPV6,
1576: IPV6CTL_DEFHLIM, CTL_EOL);
1.73 atatat 1577: sysctl_createv(clog, 0, NULL, NULL,
1578: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1579: CTLTYPE_INT, "maxfragpackets",
1580: SYSCTL_DESCR("Maximum number of fragments to buffer "
1581: "for reassembly"),
1.70 atatat 1582: NULL, 0, &ip6_maxfragpackets, 0,
1583: CTL_NET, PF_INET6, IPPROTO_IPV6,
1584: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1.73 atatat 1585: sysctl_createv(clog, 0, NULL, NULL,
1586: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1587: CTLTYPE_INT, "accept_rtadv",
1588: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1589: NULL, 0, &ip6_accept_rtadv, 0,
1590: CTL_NET, PF_INET6, IPPROTO_IPV6,
1591: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1592: sysctl_createv(clog, 0, NULL, NULL,
1593: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1594: CTLTYPE_INT, "rtadv_maxroutes",
1595: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1596: NULL, 0, &ip6_rtadv_maxroutes, 0,
1597: CTL_NET, PF_INET6, IPPROTO_IPV6,
1598: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1599: sysctl_createv(clog, 0, NULL, NULL,
1600: CTLFLAG_PERMANENT,
1601: CTLTYPE_INT, "rtadv_numroutes",
1602: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1603: NULL, 0, &nd6_numroutes, 0,
1604: CTL_NET, PF_INET6, IPPROTO_IPV6,
1605: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1606: sysctl_createv(clog, 0, NULL, NULL,
1607: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1608: CTLTYPE_INT, "keepfaith",
1609: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1610: NULL, 0, &ip6_keepfaith, 0,
1611: CTL_NET, PF_INET6, IPPROTO_IPV6,
1612: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1613: sysctl_createv(clog, 0, NULL, NULL,
1614: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1615: CTLTYPE_INT, "log_interval",
1.189 maxv 1616: SYSCTL_DESCR("Minimum interval between logging "
1.74 atatat 1617: "unroutable packets"),
1.70 atatat 1618: NULL, 0, &ip6_log_interval, 0,
1619: CTL_NET, PF_INET6, IPPROTO_IPV6,
1620: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1621: sysctl_createv(clog, 0, NULL, NULL,
1622: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1623: CTLTYPE_INT, "hdrnestlimit",
1624: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1625: NULL, 0, &ip6_hdrnestlimit, 0,
1626: CTL_NET, PF_INET6, IPPROTO_IPV6,
1627: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1628: sysctl_createv(clog, 0, NULL, NULL,
1629: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1630: CTLTYPE_INT, "dad_count",
1631: SYSCTL_DESCR("Number of Duplicate Address Detection "
1632: "probes to send"),
1.70 atatat 1633: NULL, 0, &ip6_dad_count, 0,
1634: CTL_NET, PF_INET6, IPPROTO_IPV6,
1635: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1636: sysctl_createv(clog, 0, NULL, NULL,
1637: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1638: CTLTYPE_INT, "auto_flowlabel",
1639: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1640: NULL, 0, &ip6_auto_flowlabel, 0,
1641: CTL_NET, PF_INET6, IPPROTO_IPV6,
1642: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1643: sysctl_createv(clog, 0, NULL, NULL,
1644: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1645: CTLTYPE_INT, "defmcasthlim",
1646: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1647: NULL, 0, &ip6_defmcasthlim, 0,
1648: CTL_NET, PF_INET6, IPPROTO_IPV6,
1649: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.73 atatat 1650: sysctl_createv(clog, 0, NULL, NULL,
1651: CTLFLAG_PERMANENT,
1.74 atatat 1652: CTLTYPE_STRING, "kame_version",
1653: SYSCTL_DESCR("KAME Version"),
1.78 christos 1654: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1655: CTL_NET, PF_INET6, IPPROTO_IPV6,
1656: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1657: sysctl_createv(clog, 0, NULL, NULL,
1658: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1659: CTLTYPE_INT, "use_deprecated",
1660: SYSCTL_DESCR("Allow use of deprecated addresses as "
1661: "source addresses"),
1.70 atatat 1662: NULL, 0, &ip6_use_deprecated, 0,
1663: CTL_NET, PF_INET6, IPPROTO_IPV6,
1664: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1665: sysctl_createv(clog, 0, NULL, NULL,
1666: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1667: CTLTYPE_INT, "rr_prune", NULL,
1668: NULL, 0, &ip6_rr_prune, 0,
1669: CTL_NET, PF_INET6, IPPROTO_IPV6,
1670: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1671: sysctl_createv(clog, 0, NULL, NULL,
1672: CTLFLAG_PERMANENT
1.70 atatat 1673: #ifndef INET6_BINDV6ONLY
1.73 atatat 1674: |CTLFLAG_READWRITE,
1.70 atatat 1675: #endif
1.74 atatat 1676: CTLTYPE_INT, "v6only",
1677: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1678: "to PF_INET sockets"),
1.70 atatat 1679: NULL, 0, &ip6_v6only, 0,
1680: CTL_NET, PF_INET6, IPPROTO_IPV6,
1681: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1682: sysctl_createv(clog, 0, NULL, NULL,
1683: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1684: CTLTYPE_INT, "anonportmin",
1685: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1686: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1687: CTL_NET, PF_INET6, IPPROTO_IPV6,
1688: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1689: sysctl_createv(clog, 0, NULL, NULL,
1690: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1691: CTLTYPE_INT, "anonportmax",
1692: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1693: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1694: CTL_NET, PF_INET6, IPPROTO_IPV6,
1695: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1696: #ifndef IPNOPRIVPORTS
1.73 atatat 1697: sysctl_createv(clog, 0, NULL, NULL,
1698: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1699: CTLTYPE_INT, "lowportmin",
1700: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1701: "to assign"),
1.70 atatat 1702: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1703: CTL_NET, PF_INET6, IPPROTO_IPV6,
1704: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1705: sysctl_createv(clog, 0, NULL, NULL,
1706: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1707: CTLTYPE_INT, "lowportmax",
1708: SYSCTL_DESCR("Highest privileged ephemeral port number "
1709: "to assign"),
1.70 atatat 1710: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1711: CTL_NET, PF_INET6, IPPROTO_IPV6,
1712: IPV6CTL_LOWPORTMAX, CTL_EOL);
1713: #endif /* IPNOPRIVPORTS */
1.73 atatat 1714: sysctl_createv(clog, 0, NULL, NULL,
1715: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.153 christos 1716: CTLTYPE_INT, "auto_linklocal",
1717: SYSCTL_DESCR("Default value of per-interface flag for "
1718: "adding an IPv6 link-local address to "
1719: "interfaces when attached"),
1720: NULL, 0, &ip6_auto_linklocal, 0,
1721: CTL_NET, PF_INET6, IPPROTO_IPV6,
1722: IPV6CTL_AUTO_LINKLOCAL, CTL_EOL);
1723: sysctl_createv(clog, 0, NULL, NULL,
1724: CTLFLAG_PERMANENT|CTLFLAG_READONLY,
1725: CTLTYPE_STRUCT, "addctlpolicy",
1726: SYSCTL_DESCR("Return the current address control"
1727: " policy"),
1728: sysctl_net_inet6_addrctlpolicy, 0, NULL, 0,
1729: CTL_NET, PF_INET6, IPPROTO_IPV6,
1730: IPV6CTL_ADDRCTLPOLICY, CTL_EOL);
1731: sysctl_createv(clog, 0, NULL, NULL,
1732: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1733: CTLTYPE_INT, "use_tempaddr",
1734: SYSCTL_DESCR("Use temporary address"),
1735: NULL, 0, &ip6_use_tempaddr, 0,
1736: CTL_NET, PF_INET6, IPPROTO_IPV6,
1737: CTL_CREATE, CTL_EOL);
1738: sysctl_createv(clog, 0, NULL, NULL,
1739: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.150 roy 1740: CTLTYPE_INT, "prefer_tempaddr",
1741: SYSCTL_DESCR("Prefer temporary address as source "
1742: "address"),
1743: NULL, 0, &ip6_prefer_tempaddr, 0,
1744: CTL_NET, PF_INET6, IPPROTO_IPV6,
1745: CTL_CREATE, CTL_EOL);
1746: sysctl_createv(clog, 0, NULL, NULL,
1747: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1748: CTLTYPE_INT, "temppltime",
1749: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1750: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1751: CTL_NET, PF_INET6, IPPROTO_IPV6,
1752: CTL_CREATE, CTL_EOL);
1753: sysctl_createv(clog, 0, NULL, NULL,
1754: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1755: CTLTYPE_INT, "tempvltime",
1756: SYSCTL_DESCR("valid lifetime of a temporary address"),
1757: NULL, 0, &ip6_temp_valid_lifetime, 0,
1758: CTL_NET, PF_INET6, IPPROTO_IPV6,
1759: CTL_CREATE, CTL_EOL);
1760: sysctl_createv(clog, 0, NULL, NULL,
1761: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1762: CTLTYPE_INT, "maxfrags",
1763: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1764: NULL, 0, &ip6_maxfrags, 0,
1765: CTL_NET, PF_INET6, IPPROTO_IPV6,
1766: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1767: sysctl_createv(clog, 0, NULL, NULL,
1768: CTLFLAG_PERMANENT,
1769: CTLTYPE_STRUCT, "stats",
1770: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1771: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1772: CTL_NET, PF_INET6, IPPROTO_IPV6,
1773: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1774: sysctl_createv(clog, 0, NULL, NULL,
1775: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1776: CTLTYPE_INT, "use_defaultzone",
1777: SYSCTL_DESCR("Whether to use the default scope zones"),
1778: NULL, 0, &ip6_use_defzone, 0,
1779: CTL_NET, PF_INET6, IPPROTO_IPV6,
1780: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1781: sysctl_createv(clog, 0, NULL, NULL,
1782: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1783: CTLTYPE_INT, "mcast_pmtu",
1784: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1785: NULL, 0, &ip6_mcast_pmtu, 0,
1786: CTL_NET, PF_INET6, IPPROTO_IPV6,
1787: CTL_CREATE, CTL_EOL);
1.138 christos 1788: /* anonportalgo RFC6056 subtree */
1.140 christos 1789: const struct sysctlnode *portalgo_node;
1790: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1791: CTLFLAG_PERMANENT,
1792: CTLTYPE_NODE, "anonportalgo",
1793: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1794: NULL, 0, NULL, 0,
1795: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1796: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1797: CTLFLAG_PERMANENT,
1798: CTLTYPE_STRING, "available",
1799: SYSCTL_DESCR("available algorithms"),
1.140 christos 1800: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1801: CTL_CREATE, CTL_EOL);
1.140 christos 1802: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1803: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1804: CTLTYPE_STRING, "selected",
1805: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1806: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1807: CTL_CREATE, CTL_EOL);
1.141 christos 1808: sysctl_createv(clog, 0, &portalgo_node, NULL,
1809: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1810: CTLTYPE_STRUCT, "reserve",
1811: SYSCTL_DESCR("bitmap of reserved ports"),
1812: sysctl_portalgo_reserve6, 0, NULL, 0,
1813: CTL_CREATE, CTL_EOL);
1.139 christos 1814: sysctl_createv(clog, 0, NULL, NULL,
1815: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1816: CTLTYPE_INT, "neighborgcthresh",
1817: SYSCTL_DESCR("Maximum number of entries in neighbor"
1818: " cache"),
1819: NULL, 1, &ip6_neighborgcthresh, 0,
1820: CTL_NET, PF_INET6, IPPROTO_IPV6,
1821: CTL_CREATE, CTL_EOL);
1822: sysctl_createv(clog, 0, NULL, NULL,
1823: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1824: CTLTYPE_INT, "maxifprefixes",
1825: SYSCTL_DESCR("Maximum number of prefixes created by"
1826: " route advertisement per interface"),
1827: NULL, 1, &ip6_maxifprefixes, 0,
1828: CTL_NET, PF_INET6, IPPROTO_IPV6,
1829: CTL_CREATE, CTL_EOL);
1830: sysctl_createv(clog, 0, NULL, NULL,
1831: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1832: CTLTYPE_INT, "maxifdefrouters",
1833: SYSCTL_DESCR("Maximum number of default routers created"
1834: " by route advertisement per interface"),
1835: NULL, 1, &ip6_maxifdefrouters, 0,
1836: CTL_NET, PF_INET6, IPPROTO_IPV6,
1837: CTL_CREATE, CTL_EOL);
1838: sysctl_createv(clog, 0, NULL, NULL,
1839: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1840: CTLTYPE_INT, "maxdynroutes",
1841: SYSCTL_DESCR("Maximum number of routes created via"
1842: " redirect"),
1843: NULL, 1, &ip6_maxdynroutes, 0,
1844: CTL_NET, PF_INET6, IPPROTO_IPV6,
1845: CTL_CREATE, CTL_EOL);
1.2 itojun 1846: }
1.116 thorpej 1847:
1848: void
1849: ip6_statinc(u_int stat)
1850: {
1851:
1852: KASSERT(stat < IP6_NSTATS);
1853: IP6_STATINC(stat);
1854: }
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