Annotation of src/sys/netinet6/ip6_input.c, Revision 1.208.2.3
1.208.2.3! martin 1: /* $NetBSD: ip6_input.c,v 1.208.2.2 2019/09/24 03:10:35 martin 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>
1.208.2.3! martin 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.208.2.2 2019/09/24 03:10:35 martin 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:
1.148 rmind 137: static void ip6intr(void *);
1.199 maxv 138: static bool ip6_badaddr(struct ip6_hdr *);
1.112 dyoung 139: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 140:
1.136 drochner 141: static int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
1.189 maxv 142: u_int32_t *);
1.111 dyoung 143: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.128 pooka 144: static void sysctl_net_inet6_ip6_setup(struct sysctllog **);
1.2 itojun 145:
1.169 ozaki-r 146: #ifdef NET_MPSAFE
147: #define SOFTNET_LOCK() mutex_enter(softnet_lock)
148: #define SOFTNET_UNLOCK() mutex_exit(softnet_lock)
149: #else
150: #define SOFTNET_LOCK() KASSERT(mutex_owned(softnet_lock))
151: #define SOFTNET_UNLOCK() KASSERT(mutex_owned(softnet_lock))
152: #endif
153:
1.2 itojun 154: /*
155: * IP6 initialization: fill in IP6 protocol switch table.
156: * All protocols not implemented in kernel go to raw IP6 protocol handler.
157: */
158: void
1.114 matt 159: ip6_init(void)
1.2 itojun 160: {
1.78 christos 161: const struct ip6protosw *pr;
1.35 itojun 162: int i;
1.2 itojun 163:
1.163 ozaki-r 164: in6_init();
1.162 ozaki-r 165:
1.128 pooka 166: sysctl_net_inet6_ip6_setup(NULL);
1.78 christos 167: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 168: if (pr == 0)
169: panic("ip6_init");
170: for (i = 0; i < IPPROTO_MAX; i++)
171: ip6_protox[i] = pr - inet6sw;
1.78 christos 172: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
173: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 174: if (pr->pr_domain->dom_family == PF_INET6 &&
175: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
176: ip6_protox[pr->pr_protocol] = pr - inet6sw;
1.148 rmind 177:
1.149 ozaki-r 178: ip6_pktq = pktq_create(IFQ_MAXLEN, ip6intr, NULL);
1.148 rmind 179: KASSERT(ip6_pktq != NULL);
180:
1.81 rpaulo 181: scope6_init();
182: addrsel_policy_init();
1.2 itojun 183: nd6_init();
184: frag6_init();
1.133 tls 185: ip6_desync_factor = cprng_fast32() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 186:
1.208.2.3! martin 187: in6_tmpaddrtimer_init();
1.98 liamjfoy 188: #ifdef GATEWAY
1.99 liamjfoy 189: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 190: #endif
1.29 thorpej 191: /* Register our Packet Filter hook. */
1.143 rmind 192: inet6_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET6);
193: KASSERT(inet6_pfil_hook != NULL);
1.116 thorpej 194:
195: ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS);
1.208.2.2 martin 196: ip6_forward_rt_percpu = rtcache_percpu_alloc();
1.2 itojun 197: }
198:
199: /*
200: * IP6 input interrupt handling. Just pass the packet to ip6_input.
201: */
1.148 rmind 202: static void
203: ip6intr(void *arg __unused)
1.2 itojun 204: {
205: struct mbuf *m;
206:
1.193 ozaki-r 207: SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE();
1.148 rmind 208: while ((m = pktq_dequeue(ip6_pktq)) != NULL) {
1.160 ozaki-r 209: struct psref psref;
210: struct ifnet *rcvif = m_get_rcvif_psref(m, &psref);
1.148 rmind 211:
1.160 ozaki-r 212: if (rcvif == NULL) {
213: m_freem(m);
214: continue;
215: }
1.148 rmind 216: /*
217: * Drop the packet if IPv6 is disabled on the interface.
218: */
1.160 ozaki-r 219: if ((ND_IFINFO(rcvif)->flags & ND6_IFF_IFDISABLED)) {
220: m_put_rcvif_psref(rcvif, &psref);
1.83 rpaulo 221: m_freem(m);
1.148 rmind 222: continue;
1.83 rpaulo 223: }
1.160 ozaki-r 224: ip6_input(m, rcvif);
225: m_put_rcvif_psref(rcvif, &psref);
1.2 itojun 226: }
1.193 ozaki-r 227: SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE();
1.2 itojun 228: }
229:
230: void
1.160 ozaki-r 231: ip6_input(struct mbuf *m, struct ifnet *rcvif)
1.2 itojun 232: {
1.9 itojun 233: struct ip6_hdr *ip6;
1.105 dyoung 234: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 235: u_int32_t plen;
1.5 itojun 236: u_int32_t rtalert = ~0;
1.188 maxv 237: int nxt, ours = 0, rh_present = 0, frg_present;
1.9 itojun 238: struct ifnet *deliverifp = NULL;
1.64 itojun 239: int srcrt = 0;
1.171 ozaki-r 240: struct rtentry *rt = NULL;
1.105 dyoung 241: union {
242: struct sockaddr dst;
243: struct sockaddr_in6 dst6;
244: } u;
1.167 ozaki-r 245: struct route *ro;
1.2 itojun 246:
1.186 maxv 247: KASSERT(rcvif != NULL);
248:
1.2 itojun 249: /*
1.81 rpaulo 250: * make sure we don't have onion peering information into m_tag.
251: */
252: ip6_delaux(m);
253:
254: /*
1.44 itojun 255: * mbuf statistics
1.2 itojun 256: */
257: if (m->m_flags & M_EXT) {
258: if (m->m_next)
1.116 thorpej 259: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 260: else
1.116 thorpej 261: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 262: } else {
1.115 thorpej 263: #define M2MMAX 32
1.2 itojun 264: if (m->m_next) {
1.159 ozaki-r 265: if (m->m_flags & M_LOOP)
1.116 thorpej 266: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.159 ozaki-r 267: else if (rcvif->if_index < M2MMAX)
268: IP6_STATINC(IP6_STAT_M2M + rcvif->if_index);
269: else
1.116 thorpej 270: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 271: } else
1.116 thorpej 272: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 273: #undef M2MMAX
1.2 itojun 274: }
275:
1.159 ozaki-r 276: in6_ifstat_inc(rcvif, ifs6_in_receive);
1.116 thorpej 277: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 278:
1.57 thorpej 279: /*
280: * If the IPv6 header is not aligned, slurp it up into a new
281: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 282: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 283: * IPv6 header is in the first mbuf of the chain.
284: */
1.97 christos 285: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 286: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
1.186 maxv 287: (max_linkhdr + 3) & ~3)) == NULL) {
1.57 thorpej 288: /* XXXJRT new stat, please */
1.116 thorpej 289: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 290: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.57 thorpej 291: return;
292: }
293: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
1.55 itojun 294: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 295: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 296: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.9 itojun 297: return;
298: }
1.2 itojun 299: }
300:
301: ip6 = mtod(m, struct ip6_hdr *);
302:
303: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 304: IP6_STATINC(IP6_STAT_BADVERS);
1.159 ozaki-r 305: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 306: goto bad;
307: }
1.15 darrenr 308:
1.199 maxv 309: if (ip6_badaddr(ip6)) {
1.194 maxv 310: IP6_STATINC(IP6_STAT_BADSCOPE);
311: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
312: goto bad;
313: }
314:
315: /*
1.98 liamjfoy 316: * Assume that we can create a fast-forward IP flow entry
317: * based on this packet.
318: */
319: m->m_flags |= M_CANFASTFWD;
320:
1.15 darrenr 321: /*
322: * Run through list of hooks for input packets. If there are any
323: * filters which require that additional packets in the flow are
324: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
325: * Note that filters must _never_ set this flag, as another filter
326: * in the list may have previously cleared it.
1.196 maxv 327: *
328: * Don't call hooks if the packet has already been processed by
329: * IPsec (encapsulated, tunnel mode).
1.39 itojun 330: */
1.142 christos 331: #if defined(IPSEC)
1.207 knakahar 332: if (!ipsec_used || !ipsec_skip_pfil(m))
1.39 itojun 333: #else
334: if (1)
335: #endif
336: {
1.64 itojun 337: struct in6_addr odst;
1.208 ozaki-r 338: int error;
1.64 itojun 339:
340: odst = ip6->ip6_dst;
1.208 ozaki-r 341: error = pfil_run_hooks(inet6_pfil_hook, &m, rcvif, PFIL_IN);
342: if (error != 0 || m == NULL) {
343: IP6_STATINC(IP6_STAT_PFILDROP_IN);
1.39 itojun 344: return;
1.208 ozaki-r 345: }
1.208.2.1 martin 346: if (m->m_len < sizeof(struct ip6_hdr)) {
347: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
348: IP6_STATINC(IP6_STAT_TOOSMALL);
349: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
350: return;
351: }
352: }
1.39 itojun 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: /*
1.82 yamt 372: * Disambiguate address scope zones (if there is ambiguity).
373: * We first make sure that the original source or destination address
374: * is not in our internal form for scoped addresses. Such addresses
375: * are not necessarily invalid spec-wise, but we cannot accept them due
376: * to the usage conflict.
377: * in6_setscope() then also checks and rejects the cases where src or
378: * dst are the loopback address and the receiving interface
1.186 maxv 379: * is not loopback.
1.82 yamt 380: */
1.88 bouyer 381: if (__predict_false(
382: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
383: goto bad;
384: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 385: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 386: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 387: goto bad;
388: }
1.159 ozaki-r 389: if (in6_setscope(&ip6->ip6_src, rcvif, NULL) ||
390: in6_setscope(&ip6->ip6_dst, rcvif, NULL)) {
1.116 thorpej 391: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 392: goto bad;
393: }
394:
1.208.2.2 martin 395: ro = rtcache_percpu_getref(ip6_forward_rt_percpu);
1.186 maxv 396:
1.82 yamt 397: /*
1.2 itojun 398: * Multicast check
399: */
400: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
1.176 ozaki-r 401: bool ingroup;
1.9 itojun 402:
1.159 ozaki-r 403: in6_ifstat_inc(rcvif, ifs6_in_mcast);
1.2 itojun 404: /*
405: * See if we belong to the destination multicast group on the
406: * arrival interface.
407: */
1.176 ozaki-r 408: ingroup = in6_multi_group(&ip6->ip6_dst, rcvif);
1.186 maxv 409: if (ingroup) {
1.2 itojun 410: ours = 1;
1.186 maxv 411: } else if (!ip6_mrouter) {
1.116 thorpej 412: uint64_t *ip6s = IP6_STAT_GETREF();
413: ip6s[IP6_STAT_NOTMEMBER]++;
414: ip6s[IP6_STAT_CANTFORWARD]++;
415: IP6_STAT_PUTREF();
1.159 ozaki-r 416: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.171 ozaki-r 417: goto bad_unref;
1.2 itojun 418: }
1.159 ozaki-r 419: deliverifp = rcvif;
1.2 itojun 420: goto hbhcheck;
421: }
422:
1.105 dyoung 423: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
424:
1.2 itojun 425: /*
1.186 maxv 426: * Unicast check
1.2 itojun 427: */
1.167 ozaki-r 428: rt = rtcache_lookup2(ro, &u.dst, 1, &hit);
1.105 dyoung 429: if (hit)
1.116 thorpej 430: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 431: else
1.116 thorpej 432: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 433:
1.2 itojun 434: /*
435: * Accept the packet if the forwarding interface to the destination
1.186 maxv 436: * (according to the routing table) is the loopback interface,
1.2 itojun 437: * unless the associated route has a gateway.
1.186 maxv 438: *
439: * We don't explicitly match ip6_dst against an interface here. It
440: * is already done in rtcache_lookup2: rt->rt_ifp->if_type will be
441: * IFT_LOOP if the packet is for us.
442: *
1.2 itojun 443: * Note that this approach causes to accept a packet if there is a
444: * route to the loopback interface for the destination of the packet.
445: * But we think it's even useful in some situations, e.g. when using
446: * a special daemon which wants to intercept the packet.
447: */
1.105 dyoung 448: if (rt != NULL &&
449: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
450: rt->rt_ifp->if_type == IFT_LOOP) {
451: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.184 roy 452: int addrok;
453:
1.2 itojun 454: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
455: m->m_flags |= M_ANYCAST6;
1.24 itojun 456: /*
457: * packets to a tentative, duplicated, or somehow invalid
458: * address must not be accepted.
459: */
1.184 roy 460: if (ia6->ia6_flags & IN6_IFF_NOTREADY)
461: addrok = 0;
462: else if (ia6->ia6_flags & IN6_IFF_DETACHED &&
463: !IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src))
464: {
465: /* Allow internal traffic to DETACHED addresses */
466: struct sockaddr_in6 sin6;
467: int s;
468:
469: memset(&sin6, 0, sizeof(sin6));
470: sin6.sin6_family = AF_INET6;
471: sin6.sin6_len = sizeof(sin6);
472: sin6.sin6_addr = ip6->ip6_src;
473: s = pserialize_read_enter();
474: addrok = (ifa_ifwithaddr(sin6tosa(&sin6)) != NULL);
475: pserialize_read_exit(s);
476: } else
1.185 kre 477: addrok = 1;
1.184 roy 478: if (addrok) {
1.24 itojun 479: /* this address is ready */
1.2 itojun 480: ours = 1;
1.9 itojun 481: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 482: goto hbhcheck;
483: } else {
1.24 itojun 484: /* address is not ready, so discard the packet. */
1.172 ryo 485: char ip6bufs[INET6_ADDRSTRLEN];
486: char ip6bufd[INET6_ADDRSTRLEN];
1.157 ozaki-r 487: nd6log(LOG_INFO, "packet to an unready address %s->%s\n",
1.173 christos 488: IN6_PRINT(ip6bufs, &ip6->ip6_src),
489: IN6_PRINT(ip6bufd, &ip6->ip6_dst));
1.24 itojun 490:
1.171 ozaki-r 491: goto bad_unref;
1.2 itojun 492: }
493: }
494:
495: /*
1.55 itojun 496: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 497: */
498: #if defined(NFAITH) && 0 < NFAITH
499: if (ip6_keepfaith) {
1.105 dyoung 500: if (rt != NULL && rt->rt_ifp != NULL &&
501: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 502: /* XXX do we need more sanity checks? */
503: ours = 1;
1.105 dyoung 504: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 505: goto hbhcheck;
506: }
507: }
508: #endif
509:
1.2 itojun 510: /*
511: * Now there is no reason to process the packet if it's not our own
512: * and we're not a router.
513: */
514: if (!ip6_forwarding) {
1.116 thorpej 515: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.159 ozaki-r 516: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.171 ozaki-r 517: goto bad_unref;
1.2 itojun 518: }
519:
1.186 maxv 520: hbhcheck:
1.2 itojun 521: /*
1.186 maxv 522: * Record address information into m_tag, if we don't have one yet.
523: * Note that we are unable to record it, if the address is not listed
1.81 rpaulo 524: * as our interface address (e.g. multicast addresses, addresses
525: * within FAITH prefixes and such).
526: */
1.111 dyoung 527: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 528: struct in6_ifaddr *ia6;
1.165 ozaki-r 529: int s = pserialize_read_enter();
1.81 rpaulo 530:
531: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.165 ozaki-r 532: /* Depends on ip6_setdstifaddr never sleep */
1.111 dyoung 533: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
534: /*
535: * XXX maybe we should drop the packet here,
536: * as we could not provide enough information
537: * to the upper layers.
538: */
1.81 rpaulo 539: }
1.165 ozaki-r 540: pserialize_read_exit(s);
1.81 rpaulo 541: }
542:
543: /*
1.2 itojun 544: * Process Hop-by-Hop options header if it's contained.
545: * m may be modified in ip6_hopopts_input().
546: * If a JumboPayload option is included, plen will also be modified.
547: */
548: plen = (u_int32_t)ntohs(ip6->ip6_plen);
549: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 550: struct ip6_hbh *hbh;
551:
552: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
1.186 maxv 553: /* m already freed */
1.159 ozaki-r 554: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.171 ozaki-r 555: rtcache_unref(rt, ro);
1.208.2.2 martin 556: rtcache_percpu_putref(ip6_forward_rt_percpu);
1.186 maxv 557: return;
1.9 itojun 558: }
1.22 itojun 559:
1.2 itojun 560: /* adjust pointer */
561: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 562:
563: /*
1.49 itojun 564: * if the payload length field is 0 and the next header field
1.22 itojun 565: * indicates Hop-by-Hop Options header, then a Jumbo Payload
566: * option MUST be included.
567: */
568: if (ip6->ip6_plen == 0 && plen == 0) {
569: /*
570: * Note that if a valid jumbo payload option is
1.83 rpaulo 571: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 572: * (non-zero) payload length to the variable plen.
1.22 itojun 573: */
1.116 thorpej 574: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.159 ozaki-r 575: in6_ifstat_inc(rcvif, ifs6_in_discard);
576: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.22 itojun 577: icmp6_error(m, ICMP6_PARAM_PROB,
578: ICMP6_PARAMPROB_HEADER,
1.97 christos 579: (char *)&ip6->ip6_plen - (char *)ip6);
1.171 ozaki-r 580: rtcache_unref(rt, ro);
1.208.2.2 martin 581: rtcache_percpu_putref(ip6_forward_rt_percpu);
1.22 itojun 582: return;
583: }
1.9 itojun 584: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
585: sizeof(struct ip6_hbh));
586: if (hbh == NULL) {
1.116 thorpej 587: IP6_STATINC(IP6_STAT_TOOSHORT);
1.171 ozaki-r 588: rtcache_unref(rt, ro);
1.208.2.2 martin 589: rtcache_percpu_putref(ip6_forward_rt_percpu);
1.9 itojun 590: return;
591: }
1.57 thorpej 592: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 593: nxt = hbh->ip6h_nxt;
1.2 itojun 594:
595: /*
596: * accept the packet if a router alert option is included
597: * and we act as an IPv6 router.
598: */
1.5 itojun 599: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 600: ours = 1;
601: } else
602: nxt = ip6->ip6_nxt;
603:
604: /*
1.186 maxv 605: * Check that the amount of data in the buffers is at least much as
606: * the IPv6 header would have us expect. Trim mbufs if longer than we
607: * expect. Drop packet if shorter than we expect.
1.2 itojun 608: */
609: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 610: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 611: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.171 ozaki-r 612: goto bad_unref;
1.2 itojun 613: }
614: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
615: if (m->m_len == m->m_pkthdr.len) {
616: m->m_len = sizeof(struct ip6_hdr) + plen;
617: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
618: } else
619: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
620: }
621:
622: /*
623: * Forward if desirable.
624: */
625: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
626: /*
627: * If we are acting as a multicast router, all
628: * incoming multicast packets are passed to the
629: * kernel-level multicast forwarding function.
630: * The packet is returned (relatively) intact; if
631: * ip6_mforward() returns a non-zero value, the packet
632: * must be discarded, else it may be accepted below.
633: */
1.169 ozaki-r 634: if (ip6_mrouter != NULL) {
635: int error;
636:
637: SOFTNET_LOCK();
638: error = ip6_mforward(ip6, rcvif, m);
639: SOFTNET_UNLOCK();
640:
641: if (error != 0) {
1.171 ozaki-r 642: rtcache_unref(rt, ro);
1.208.2.2 martin 643: rtcache_percpu_putref(ip6_forward_rt_percpu);
1.169 ozaki-r 644: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.170 ozaki-r 645: goto bad;
1.169 ozaki-r 646: }
1.2 itojun 647: }
1.170 ozaki-r 648: if (!ours)
1.171 ozaki-r 649: goto bad_unref;
1.22 itojun 650: } else if (!ours) {
1.171 ozaki-r 651: rtcache_unref(rt, ro);
1.208.2.2 martin 652: rtcache_percpu_putref(ip6_forward_rt_percpu);
1.64 itojun 653: ip6_forward(m, srcrt);
1.2 itojun 654: return;
1.56 itojun 655: }
1.25 itojun 656:
657: ip6 = mtod(m, struct ip6_hdr *);
658:
659: /*
660: * Malicious party may be able to use IPv4 mapped addr to confuse
661: * tcp/udp stack and bypass security checks (act as if it was from
662: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
663: *
664: * For SIIT end node behavior, you may want to disable the check.
665: * However, you will become vulnerable to attacks using IPv4 mapped
666: * source.
667: */
668: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
669: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 670: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 671: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.171 ozaki-r 672: goto bad_unref;
1.25 itojun 673: }
1.2 itojun 674:
1.12 itojun 675: #ifdef IFA_STATS
1.28 itojun 676: if (deliverifp != NULL) {
1.9 itojun 677: struct in6_ifaddr *ia6;
1.165 ozaki-r 678: int s = pserialize_read_enter();
1.9 itojun 679: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
680: if (ia6)
681: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
1.165 ozaki-r 682: pserialize_read_exit(s);
1.9 itojun 683: }
684: #endif
1.116 thorpej 685: IP6_STATINC(IP6_STAT_DELIVERED);
1.9 itojun 686: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 687: nest = 0;
1.40 itojun 688:
1.171 ozaki-r 689: if (rt != NULL) {
690: rtcache_unref(rt, ro);
691: rt = NULL;
692: }
1.208.2.2 martin 693: rtcache_percpu_putref(ip6_forward_rt_percpu);
1.171 ozaki-r 694:
1.104 yamt 695: rh_present = 0;
1.188 maxv 696: frg_present = 0;
1.2 itojun 697: while (nxt != IPPROTO_DONE) {
698: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.116 thorpej 699: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.159 ozaki-r 700: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 701: goto bad;
702: }
1.8 itojun 703:
1.197 maxv 704: M_VERIFY_PACKET(m);
705:
1.8 itojun 706: /*
707: * protection against faulty packet - there should be
708: * more sanity checks in header chain processing.
709: */
710: if (m->m_pkthdr.len < off) {
1.116 thorpej 711: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 712: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.8 itojun 713: goto bad;
714: }
715:
1.104 yamt 716: if (nxt == IPPROTO_ROUTING) {
717: if (rh_present++) {
1.159 ozaki-r 718: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.116 thorpej 719: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 720: goto bad;
721: }
1.188 maxv 722: } else if (nxt == IPPROTO_FRAGMENT) {
723: if (frg_present++) {
724: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
725: IP6_STATINC(IP6_STAT_BADOPTIONS);
726: goto bad;
727: }
1.104 yamt 728: }
729:
1.142 christos 730: #ifdef IPSEC
1.146 christos 731: if (ipsec_used) {
1.94 degroote 732: /*
1.186 maxv 733: * Enforce IPsec policy checking if we are seeing last
734: * header. Note that we do not visit this with
1.146 christos 735: * protocols with pcb layer code - like udp/tcp/raw ip.
1.94 degroote 736: */
1.206 maxv 737: if ((inet6sw[ip6_protox[nxt]].pr_flags
1.146 christos 738: & PR_LASTHDR) != 0) {
1.169 ozaki-r 739: int error;
740:
1.202 maxv 741: error = ipsec_ip_input(m, false);
1.146 christos 742: if (error)
743: goto bad;
744: }
1.94 degroote 745: }
1.186 maxv 746: #endif
1.94 degroote 747:
1.2 itojun 748: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
749: }
750: return;
1.171 ozaki-r 751:
1.186 maxv 752: bad_unref:
1.171 ozaki-r 753: rtcache_unref(rt, ro);
1.208.2.2 martin 754: rtcache_percpu_putref(ip6_forward_rt_percpu);
1.186 maxv 755: bad:
1.2 itojun 756: m_freem(m);
1.171 ozaki-r 757: return;
1.2 itojun 758: }
759:
1.199 maxv 760: static bool
761: ip6_badaddr(struct ip6_hdr *ip6)
762: {
763: /* Check against address spoofing/corruption. */
764: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
765: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
766: return true;
767: }
768:
769: /*
770: * The following check is not documented in specs. A malicious
771: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
772: * and bypass security checks (act as if it was from 127.0.0.1 by using
773: * IPv6 src ::ffff:127.0.0.1). Be cautious.
774: *
775: * This check chokes if we are in an SIIT cloud. As none of BSDs
776: * support IPv4-less kernel compilation, we cannot support SIIT
777: * environment at all. So, it makes more sense for us to reject any
778: * malicious packets for non-SIIT environment, than try to do a
779: * partial support for SIIT environment.
780: */
781: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
782: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
783: return true;
784: }
785:
786: /*
787: * Reject packets with IPv4-compatible IPv6 addresses (RFC4291).
788: */
789: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
790: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
791: return true;
792: }
793:
794: return false;
795: }
796:
1.2 itojun 797: /*
1.81 rpaulo 798: * set/grab in6_ifaddr correspond to IPv6 destination address.
799: */
800: static struct m_tag *
1.112 dyoung 801: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 802: {
803: struct m_tag *mtag;
1.144 christos 804: struct ip6aux *ip6a;
1.81 rpaulo 805:
806: mtag = ip6_addaux(m);
1.144 christos 807: if (mtag == NULL)
808: return NULL;
1.112 dyoung 809:
1.144 christos 810: ip6a = (struct ip6aux *)(mtag + 1);
811: if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) {
812: IP6_STATINC(IP6_STAT_BADSCOPE);
813: return NULL;
1.112 dyoung 814: }
1.144 christos 815:
816: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
817: ip6a->ip6a_flags = ia->ia6_flags;
818: return mtag;
1.81 rpaulo 819: }
820:
1.112 dyoung 821: const struct ip6aux *
1.107 christos 822: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 823: {
824: struct m_tag *mtag;
825:
826: mtag = ip6_findaux(m);
1.112 dyoung 827: if (mtag != NULL)
828: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 829: else
830: return NULL;
831: }
832:
833: /*
1.2 itojun 834: * Hop-by-Hop options header processing. If a valid jumbo payload option is
835: * included, the real payload length will be stored in plenp.
1.107 christos 836: *
837: * rtalertp - XXX: should be stored more smart way
1.2 itojun 838: */
1.136 drochner 839: int
1.107 christos 840: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
841: struct mbuf **mp, int *offp)
1.2 itojun 842: {
1.35 itojun 843: struct mbuf *m = *mp;
1.2 itojun 844: int off = *offp, hbhlen;
845: struct ip6_hbh *hbh;
846:
847: /* validation of the length of the header */
1.9 itojun 848: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
1.189 maxv 849: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
1.9 itojun 850: if (hbh == NULL) {
1.116 thorpej 851: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 852: return -1;
853: }
854: hbhlen = (hbh->ip6h_len + 1) << 3;
855: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
1.189 maxv 856: hbhlen);
1.9 itojun 857: if (hbh == NULL) {
1.116 thorpej 858: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 859: return -1;
860: }
1.57 thorpej 861: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 862: off += hbhlen;
863: hbhlen -= sizeof(struct ip6_hbh);
864:
865: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
1.189 maxv 866: hbhlen, rtalertp, plenp) < 0)
867: return -1;
1.2 itojun 868:
869: *offp = off;
870: *mp = m;
1.189 maxv 871: return 0;
1.2 itojun 872: }
873:
874: /*
875: * Search header for all Hop-by-hop options and process each option.
876: * This function is separate from ip6_hopopts_input() in order to
877: * handle a case where the sending node itself process its hop-by-hop
878: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 879: *
880: * The function assumes that hbh header is located right after the IPv6 header
881: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
882: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 883: */
1.136 drochner 884: static int
1.107 christos 885: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
886: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 887: {
888: struct ip6_hdr *ip6;
889: int optlen = 0;
890: u_int8_t *opt = opthead;
891: u_int16_t rtalert_val;
1.22 itojun 892: u_int32_t jumboplen;
1.55 itojun 893: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 894:
895: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 896: switch (*opt) {
897: case IP6OPT_PAD1:
898: optlen = 1;
899: break;
900: case IP6OPT_PADN:
901: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 902: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 903: goto bad;
904: }
905: optlen = *(opt + 1) + 2;
906: break;
907: case IP6OPT_RTALERT:
908: /* XXX may need check for alignment */
909: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 910: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 911: goto bad;
912: }
913: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 914: /* XXX stat */
915: icmp6_error(m, ICMP6_PARAM_PROB,
916: ICMP6_PARAMPROB_HEADER,
917: erroff + opt + 1 - opthead);
918: return (-1);
1.35 itojun 919: }
920: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 921: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 922: *rtalertp = ntohs(rtalert_val);
923: break;
924: case IP6OPT_JUMBO:
1.22 itojun 925: /* XXX may need check for alignment */
926: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 927: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 928: goto bad;
929: }
1.35 itojun 930: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 931: /* XXX stat */
932: icmp6_error(m, ICMP6_PARAM_PROB,
933: ICMP6_PARAMPROB_HEADER,
934: erroff + opt + 1 - opthead);
935: return (-1);
1.35 itojun 936: }
1.22 itojun 937: optlen = IP6OPT_JUMBO_LEN;
938:
939: /*
940: * IPv6 packets that have non 0 payload length
1.35 itojun 941: * must not contain a jumbo payload option.
1.22 itojun 942: */
943: ip6 = mtod(m, struct ip6_hdr *);
944: if (ip6->ip6_plen) {
1.116 thorpej 945: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 946: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 947: ICMP6_PARAMPROB_HEADER,
948: erroff + opt - opthead);
949: return (-1);
1.22 itojun 950: }
1.2 itojun 951:
1.22 itojun 952: /*
953: * We may see jumbolen in unaligned location, so
1.191 maxv 954: * we'd need to perform memcpy().
1.22 itojun 955: */
1.126 tsutsui 956: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 957: jumboplen = (u_int32_t)htonl(jumboplen);
958:
959: #if 1
960: /*
961: * if there are multiple jumbo payload options,
962: * *plenp will be non-zero and the packet will be
963: * rejected.
964: * the behavior may need some debate in ipngwg -
965: * multiple options does not make sense, however,
966: * there's no explicit mention in specification.
967: */
968: if (*plenp != 0) {
1.116 thorpej 969: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 970: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 971: ICMP6_PARAMPROB_HEADER,
972: erroff + opt + 2 - opthead);
973: return (-1);
1.22 itojun 974: }
1.8 itojun 975: #endif
1.2 itojun 976:
1.22 itojun 977: /*
978: * jumbo payload length must be larger than 65535.
979: */
980: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 981: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 982: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 983: ICMP6_PARAMPROB_HEADER,
984: erroff + opt + 2 - opthead);
985: return (-1);
1.22 itojun 986: }
987: *plenp = jumboplen;
988:
989: break;
1.35 itojun 990: default: /* unknown option */
991: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 992: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 993: goto bad;
994: }
1.55 itojun 995: optlen = ip6_unknown_opt(opt, m,
996: erroff + opt - opthead);
997: if (optlen == -1)
998: return (-1);
1.35 itojun 999: optlen += 2;
1000: break;
1.2 itojun 1001: }
1002: }
1003:
1.55 itojun 1004: return (0);
1.2 itojun 1005:
1006: bad:
1007: m_freem(m);
1.55 itojun 1008: return (-1);
1.2 itojun 1009: }
1010:
1011: /*
1012: * Unknown option processing.
1013: * The third argument `off' is the offset from the IPv6 header to the option,
1014: * which is necessary if the IPv6 header the and option header and IPv6 header
1015: * is not continuous in order to return an ICMPv6 error.
1016: */
1017: int
1.107 christos 1018: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1019: {
1020: struct ip6_hdr *ip6;
1021:
1.35 itojun 1022: switch (IP6OPT_TYPE(*optp)) {
1023: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1024: return ((int)*(optp + 1));
1.35 itojun 1025: case IP6OPT_TYPE_DISCARD: /* silently discard */
1026: m_freem(m);
1.58 itojun 1027: return (-1);
1.35 itojun 1028: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 1029: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1030: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1031: return (-1);
1.35 itojun 1032: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 1033: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1034: ip6 = mtod(m, struct ip6_hdr *);
1035: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1036: (m->m_flags & (M_BCAST|M_MCAST)))
1037: m_freem(m);
1038: else
1039: icmp6_error(m, ICMP6_PARAM_PROB,
1040: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1041: return (-1);
1.2 itojun 1042: }
1043:
1044: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1045: return (-1);
1.2 itojun 1046: }
1047:
1048: void
1.107 christos 1049: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1050: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1051: {
1.179 christos 1052: struct socket *so = in6p->in6p_socket;
1.85 rpaulo 1053: #ifdef RFC2292
1054: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1055: #else
1056: #define IS2292(x, y) (y)
1057: #endif
1058:
1.179 christos 1059: if (SOOPT_TIMESTAMP(so->so_options))
1.200 maxv 1060: mp = sbsavetimestamp(so->so_options, mp);
1.87 rpaulo 1061:
1062: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1063: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1064: return;
1065:
1.2 itojun 1066: /* RFC 2292 sec. 5 */
1.35 itojun 1067: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1068: struct in6_pktinfo pi6;
1.85 rpaulo 1069:
1.126 tsutsui 1070: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1071: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.160 ozaki-r 1072: pi6.ipi6_ifindex = m->m_pkthdr.rcvif_index;
1.180 christos 1073: *mp = sbcreatecontrol(&pi6, sizeof(pi6),
1.85 rpaulo 1074: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1075: if (*mp)
1076: mp = &(*mp)->m_next;
1077: }
1.85 rpaulo 1078:
1.2 itojun 1079: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1080: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1081:
1.180 christos 1082: *mp = sbcreatecontrol(&hlim, sizeof(hlim),
1.85 rpaulo 1083: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1084: if (*mp)
1085: mp = &(*mp)->m_next;
1086: }
1087:
1088: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1089: u_int32_t flowinfo;
1090: int tclass;
1091:
1092: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1093: flowinfo >>= 20;
1094:
1095: tclass = flowinfo & 0xff;
1.180 christos 1096: *mp = sbcreatecontrol(&tclass, sizeof(tclass),
1.85 rpaulo 1097: IPV6_TCLASS, IPPROTO_IPV6);
1098:
1.2 itojun 1099: if (*mp)
1100: mp = &(*mp)->m_next;
1101: }
1102:
1103: /*
1.75 itojun 1104: * IPV6_HOPOPTS socket option. Recall that we required super-user
1105: * privilege for the option (see ip6_ctloutput), but it might be too
1106: * strict, since there might be some hop-by-hop options which can be
1107: * returned to normal user.
1.85 rpaulo 1108: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1109: */
1.75 itojun 1110: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1111: /*
1112: * Check if a hop-by-hop options header is contatined in the
1113: * received packet, and if so, store the options as ancillary
1114: * data. Note that a hop-by-hop options header must be
1115: * just after the IPv6 header, which fact is assured through
1116: * the IPv6 input processing.
1117: */
1.78 christos 1118: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1119: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1120: struct ip6_hbh *hbh;
1121: int hbhlen;
1.62 itojun 1122: struct mbuf *ext;
1.9 itojun 1123:
1.62 itojun 1124: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1125: xip6->ip6_nxt);
1.62 itojun 1126: if (ext == NULL) {
1.116 thorpej 1127: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1128: return;
1129: }
1.62 itojun 1130: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1131: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1132: if (hbhlen != ext->m_len) {
1133: m_freem(ext);
1.116 thorpej 1134: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1135: return;
1136: }
1.2 itojun 1137:
1138: /*
1139: * XXX: We copy whole the header even if a jumbo
1140: * payload option is included, which option is to
1141: * be removed before returning in the RFC 2292.
1.85 rpaulo 1142: * Note: this constraint is removed in RFC3542.
1.2 itojun 1143: */
1.180 christos 1144: *mp = sbcreatecontrol(hbh, hbhlen,
1.85 rpaulo 1145: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1146: IPPROTO_IPV6);
1.2 itojun 1147: if (*mp)
1148: mp = &(*mp)->m_next;
1.62 itojun 1149: m_freem(ext);
1.2 itojun 1150: }
1151: }
1152:
1153: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1154: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1155: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1156: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1157:
1158: /*
1159: * Search for destination options headers or routing
1160: * header(s) through the header chain, and stores each
1161: * header as ancillary data.
1162: * Note that the order of the headers remains in
1163: * the chain of ancillary data.
1164: */
1.86 rpaulo 1165: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1166: struct ip6_ext *ip6e = NULL;
1.9 itojun 1167: int elen;
1.62 itojun 1168: struct mbuf *ext = NULL;
1.9 itojun 1169:
1.62 itojun 1170: /*
1171: * if it is not an extension header, don't try to
1172: * pull it from the chain.
1173: */
1174: switch (nxt) {
1175: case IPPROTO_DSTOPTS:
1176: case IPPROTO_ROUTING:
1177: case IPPROTO_HOPOPTS:
1178: case IPPROTO_AH: /* is it possible? */
1179: break;
1180: default:
1181: goto loopend;
1182: }
1183:
1184: ext = ip6_pullexthdr(m, off, nxt);
1185: if (ext == NULL) {
1.116 thorpej 1186: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1187: return;
1188: }
1.62 itojun 1189: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1190: if (nxt == IPPROTO_AH)
1191: elen = (ip6e->ip6e_len + 2) << 2;
1192: else
1193: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1194: if (elen != ext->m_len) {
1195: m_freem(ext);
1.116 thorpej 1196: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1197: return;
1198: }
1.57 thorpej 1199: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1200:
1.35 itojun 1201: switch (nxt) {
1.62 itojun 1202: case IPPROTO_DSTOPTS:
1.127 martin 1203: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1204: break;
1205:
1.180 christos 1206: *mp = sbcreatecontrol(ip6e, elen,
1.85 rpaulo 1207: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1208: IPPROTO_IPV6);
1.35 itojun 1209: if (*mp)
1210: mp = &(*mp)->m_next;
1211: break;
1212:
1213: case IPPROTO_ROUTING:
1.127 martin 1214: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1215: break;
1216:
1.180 christos 1217: *mp = sbcreatecontrol(ip6e, elen,
1.85 rpaulo 1218: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1219: IPPROTO_IPV6);
1.35 itojun 1220: if (*mp)
1221: mp = &(*mp)->m_next;
1222: break;
1223:
1.62 itojun 1224: case IPPROTO_HOPOPTS:
1225: case IPPROTO_AH: /* is it possible? */
1226: break;
1227:
1.35 itojun 1228: default:
1229: /*
1.62 itojun 1230: * other cases have been filtered in the above.
1231: * none will visit this case. here we supply
1232: * the code just in case (nxt overwritten or
1233: * other cases).
1.35 itojun 1234: */
1.62 itojun 1235: m_freem(ext);
1.35 itojun 1236: goto loopend;
1237:
1.2 itojun 1238: }
1239:
1240: /* proceed with the next header. */
1.9 itojun 1241: off += elen;
1.2 itojun 1242: nxt = ip6e->ip6e_nxt;
1.62 itojun 1243: ip6e = NULL;
1244: m_freem(ext);
1245: ext = NULL;
1.2 itojun 1246: }
1247: loopend:
1.62 itojun 1248: ;
1.2 itojun 1249: }
1.62 itojun 1250: }
1.85 rpaulo 1251: #undef IS2292
1252:
1253:
1254: void
1.95 dyoung 1255: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1256: uint32_t *mtu)
1.85 rpaulo 1257: {
1258: struct socket *so;
1259: struct mbuf *m_mtu;
1260: struct ip6_mtuinfo mtuctl;
1261:
1262: so = in6p->in6p_socket;
1263:
1264: if (mtu == NULL)
1265: return;
1266:
1.177 ozaki-r 1267: KASSERT(so != NULL);
1.85 rpaulo 1268:
1269: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1270: mtuctl.ip6m_mtu = *mtu;
1271: mtuctl.ip6m_addr = *dst;
1272: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1273: return;
1274:
1.180 christos 1275: if ((m_mtu = sbcreatecontrol(&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1276: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1277: return;
1278:
1.95 dyoung 1279: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1280: == 0) {
1.195 roy 1281: soroverflow(so);
1.85 rpaulo 1282: m_freem(m_mtu);
1283: } else
1284: sorwakeup(so);
1285:
1286: return;
1287: }
1.62 itojun 1288:
1289: /*
1290: * pull single extension header from mbuf chain. returns single mbuf that
1291: * contains the result, or NULL on error.
1292: */
1293: static struct mbuf *
1.107 christos 1294: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1295: {
1296: struct ip6_ext ip6e;
1297: size_t elen;
1298: struct mbuf *n;
1299:
1.97 christos 1300: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1301: if (nxt == IPPROTO_AH)
1302: elen = (ip6e.ip6e_len + 2) << 2;
1303: else
1304: elen = (ip6e.ip6e_len + 1) << 3;
1305:
1306: MGET(n, M_DONTWAIT, MT_DATA);
1307: if (n && elen >= MLEN) {
1308: MCLGET(n, M_DONTWAIT);
1309: if ((n->m_flags & M_EXT) == 0) {
1310: m_free(n);
1311: n = NULL;
1312: }
1313: }
1314: if (!n)
1315: return NULL;
1316:
1317: n->m_len = 0;
1318: if (elen >= M_TRAILINGSPACE(n)) {
1319: m_free(n);
1320: return NULL;
1321: }
1322:
1.97 christos 1323: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1324: n->m_len = elen;
1325: return n;
1.2 itojun 1326: }
1327:
1328: /*
1.187 maxv 1329: * Get offset to the previous header followed by the header
1.2 itojun 1330: * currently processed.
1331: */
1.187 maxv 1332: int
1.107 christos 1333: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1334: {
1335: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1336:
1.187 maxv 1337: if (off == sizeof(struct ip6_hdr)) {
1338: return offsetof(struct ip6_hdr, ip6_nxt);
1339: } else if (off < sizeof(struct ip6_hdr)) {
1340: panic("%s: off < sizeof(struct ip6_hdr)", __func__);
1341: } else {
1342: int len, nlen, nxt;
1343: struct ip6_ext ip6e;
1.2 itojun 1344:
1345: nxt = ip6->ip6_nxt;
1346: len = sizeof(struct ip6_hdr);
1.187 maxv 1347: nlen = 0;
1.2 itojun 1348: while (len < off) {
1.187 maxv 1349: m_copydata(m, len, sizeof(ip6e), &ip6e);
1.2 itojun 1350:
1.35 itojun 1351: switch (nxt) {
1.2 itojun 1352: case IPPROTO_FRAGMENT:
1.187 maxv 1353: nlen = sizeof(struct ip6_frag);
1.2 itojun 1354: break;
1355: case IPPROTO_AH:
1.187 maxv 1356: nlen = (ip6e.ip6e_len + 2) << 2;
1.2 itojun 1357: break;
1358: default:
1.187 maxv 1359: nlen = (ip6e.ip6e_len + 1) << 3;
1.2 itojun 1360: break;
1361: }
1.187 maxv 1362: len += nlen;
1363: nxt = ip6e.ip6e_nxt;
1.2 itojun 1364: }
1.187 maxv 1365:
1366: return (len - nlen);
1.18 itojun 1367: }
1368: }
1369:
1370: /*
1371: * get next header offset. m will be retained.
1372: */
1.192 maxv 1373: int
1.107 christos 1374: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1375: {
1376: struct ip6_hdr ip6;
1377: struct ip6_ext ip6e;
1378: struct ip6_frag fh;
1379:
1380: /* just in case */
1381: if (m == NULL)
1.189 maxv 1382: panic("%s: m == NULL", __func__);
1.18 itojun 1383: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1384: return -1;
1385:
1386: switch (proto) {
1387: case IPPROTO_IPV6:
1.83 rpaulo 1388: /* do not chase beyond intermediate IPv6 headers */
1389: if (off != 0)
1390: return -1;
1.18 itojun 1391: if (m->m_pkthdr.len < off + sizeof(ip6))
1392: return -1;
1.97 christos 1393: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1394: if (nxtp)
1395: *nxtp = ip6.ip6_nxt;
1396: off += sizeof(ip6);
1397: return off;
1398:
1399: case IPPROTO_FRAGMENT:
1400: /*
1401: * terminate parsing if it is not the first fragment,
1402: * it does not make sense to parse through it.
1403: */
1404: if (m->m_pkthdr.len < off + sizeof(fh))
1405: return -1;
1.97 christos 1406: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1407: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1408: return -1;
1409: if (nxtp)
1410: *nxtp = fh.ip6f_nxt;
1411: off += sizeof(struct ip6_frag);
1412: return off;
1413:
1414: case IPPROTO_AH:
1415: if (m->m_pkthdr.len < off + sizeof(ip6e))
1416: return -1;
1.97 christos 1417: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1418: if (nxtp)
1419: *nxtp = ip6e.ip6e_nxt;
1420: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1421: if (m->m_pkthdr.len < off)
1422: return -1;
1.18 itojun 1423: return off;
1424:
1425: case IPPROTO_HOPOPTS:
1426: case IPPROTO_ROUTING:
1427: case IPPROTO_DSTOPTS:
1428: if (m->m_pkthdr.len < off + sizeof(ip6e))
1429: return -1;
1.97 christos 1430: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1431: if (nxtp)
1432: *nxtp = ip6e.ip6e_nxt;
1433: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1434: if (m->m_pkthdr.len < off)
1435: return -1;
1.18 itojun 1436: return off;
1437:
1438: case IPPROTO_NONE:
1439: case IPPROTO_ESP:
1440: case IPPROTO_IPCOMP:
1441: /* give up */
1442: return -1;
1443:
1444: default:
1445: return -1;
1446: }
1447: }
1448:
1449: /*
1450: * get offset for the last header in the chain. m will be kept untainted.
1451: */
1452: int
1.107 christos 1453: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1454: {
1455: int newoff;
1456: int nxt;
1457:
1458: if (!nxtp) {
1459: nxt = -1;
1460: nxtp = &nxt;
1461: }
1.86 rpaulo 1462: for (;;) {
1.18 itojun 1463: newoff = ip6_nexthdr(m, off, proto, nxtp);
1464: if (newoff < 0)
1465: return off;
1466: else if (newoff < off)
1467: return -1; /* invalid */
1468: else if (newoff == off)
1469: return newoff;
1470:
1471: off = newoff;
1472: proto = *nxtp;
1.2 itojun 1473: }
1474: }
1475:
1.81 rpaulo 1476: struct m_tag *
1.107 christos 1477: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1478: {
1479: struct m_tag *mtag;
1480:
1.205 maxv 1481: mtag = m_tag_find(m, PACKET_TAG_INET6);
1.81 rpaulo 1482: if (!mtag) {
1483: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1484: M_NOWAIT);
1485: if (mtag) {
1486: m_tag_prepend(m, mtag);
1.124 cegger 1487: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1488: }
1489: }
1490: return mtag;
1491: }
1492:
1493: struct m_tag *
1.107 christos 1494: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1495: {
1496: struct m_tag *mtag;
1497:
1.205 maxv 1498: mtag = m_tag_find(m, PACKET_TAG_INET6);
1.81 rpaulo 1499: return mtag;
1500: }
1501:
1502: void
1.107 christos 1503: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1504: {
1505: struct m_tag *mtag;
1506:
1.205 maxv 1507: mtag = m_tag_find(m, PACKET_TAG_INET6);
1.81 rpaulo 1508: if (mtag)
1509: m_tag_delete(m, mtag);
1510: }
1511:
1.2 itojun 1512: /*
1513: * System control for IP6
1514: */
1515:
1.120 matt 1516: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1517: 0, 0, 0, 0,
1518: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1519: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1520: EMSGSIZE, EHOSTUNREACH, 0, 0,
1521: 0, 0, 0, 0,
1522: ENOPROTOOPT
1523: };
1524:
1.153 christos 1525: extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS);
1526:
1.116 thorpej 1527: static int
1528: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1529: {
1530:
1.119 thorpej 1531: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1532: }
1533:
1.208.2.3! martin 1534: static int
! 1535: sysctl_net_inet6_ip6_temppltime(SYSCTLFN_ARGS)
! 1536: {
! 1537: int error;
! 1538: uint32_t pltime;
! 1539: struct sysctlnode node;
! 1540:
! 1541: node = *rnode;
! 1542: node.sysctl_data = &pltime;
! 1543: pltime = ip6_temp_preferred_lifetime;
! 1544: error = sysctl_lookup(SYSCTLFN_CALL(&node));
! 1545: if (error || newp == NULL)
! 1546: return error;
! 1547:
! 1548: if (pltime <= (MAX_TEMP_DESYNC_FACTOR + TEMPADDR_REGEN_ADVANCE))
! 1549: return EINVAL;
! 1550:
! 1551: ip6_temp_preferred_lifetime = pltime;
! 1552:
! 1553: in6_tmpaddrtimer_schedule();
! 1554:
! 1555: return 0;
! 1556: }
! 1557:
1.128 pooka 1558: static void
1559: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1560: {
1.26 itojun 1561:
1.73 atatat 1562: sysctl_createv(clog, 0, NULL, NULL,
1563: CTLFLAG_PERMANENT,
1.74 atatat 1564: CTLTYPE_NODE, "inet6",
1565: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1566: NULL, 0, NULL, 0,
1567: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1568: sysctl_createv(clog, 0, NULL, NULL,
1569: CTLFLAG_PERMANENT,
1.74 atatat 1570: CTLTYPE_NODE, "ip6",
1571: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1572: NULL, 0, NULL, 0,
1573: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1574:
1.73 atatat 1575: sysctl_createv(clog, 0, NULL, NULL,
1576: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1577: CTLTYPE_INT, "forwarding",
1578: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1579: NULL, 0, &ip6_forwarding, 0,
1580: CTL_NET, PF_INET6, IPPROTO_IPV6,
1581: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1582: sysctl_createv(clog, 0, NULL, NULL,
1583: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1584: CTLTYPE_INT, "redirect",
1585: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1586: NULL, 0, &ip6_sendredirects, 0,
1587: CTL_NET, PF_INET6, IPPROTO_IPV6,
1588: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1589: sysctl_createv(clog, 0, NULL, NULL,
1590: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1591: CTLTYPE_INT, "hlim",
1592: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1593: NULL, 0, &ip6_defhlim, 0,
1594: CTL_NET, PF_INET6, IPPROTO_IPV6,
1595: IPV6CTL_DEFHLIM, CTL_EOL);
1.73 atatat 1596: sysctl_createv(clog, 0, NULL, NULL,
1597: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1598: CTLTYPE_INT, "maxfragpackets",
1599: SYSCTL_DESCR("Maximum number of fragments to buffer "
1600: "for reassembly"),
1.70 atatat 1601: NULL, 0, &ip6_maxfragpackets, 0,
1602: CTL_NET, PF_INET6, IPPROTO_IPV6,
1603: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1.73 atatat 1604: sysctl_createv(clog, 0, NULL, NULL,
1605: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1606: CTLTYPE_INT, "accept_rtadv",
1607: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1608: NULL, 0, &ip6_accept_rtadv, 0,
1609: CTL_NET, PF_INET6, IPPROTO_IPV6,
1610: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1611: sysctl_createv(clog, 0, NULL, NULL,
1612: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1613: CTLTYPE_INT, "rtadv_maxroutes",
1614: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1615: NULL, 0, &ip6_rtadv_maxroutes, 0,
1616: CTL_NET, PF_INET6, IPPROTO_IPV6,
1617: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1618: sysctl_createv(clog, 0, NULL, NULL,
1619: CTLFLAG_PERMANENT,
1620: CTLTYPE_INT, "rtadv_numroutes",
1621: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1622: NULL, 0, &nd6_numroutes, 0,
1623: CTL_NET, PF_INET6, IPPROTO_IPV6,
1624: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1625: sysctl_createv(clog, 0, NULL, NULL,
1626: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1627: CTLTYPE_INT, "keepfaith",
1628: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1629: NULL, 0, &ip6_keepfaith, 0,
1630: CTL_NET, PF_INET6, IPPROTO_IPV6,
1631: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1632: sysctl_createv(clog, 0, NULL, NULL,
1633: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1634: CTLTYPE_INT, "log_interval",
1.189 maxv 1635: SYSCTL_DESCR("Minimum interval between logging "
1.74 atatat 1636: "unroutable packets"),
1.70 atatat 1637: NULL, 0, &ip6_log_interval, 0,
1638: CTL_NET, PF_INET6, IPPROTO_IPV6,
1639: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1640: sysctl_createv(clog, 0, NULL, NULL,
1641: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1642: CTLTYPE_INT, "hdrnestlimit",
1643: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1644: NULL, 0, &ip6_hdrnestlimit, 0,
1645: CTL_NET, PF_INET6, IPPROTO_IPV6,
1646: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1647: sysctl_createv(clog, 0, NULL, NULL,
1648: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1649: CTLTYPE_INT, "dad_count",
1650: SYSCTL_DESCR("Number of Duplicate Address Detection "
1651: "probes to send"),
1.70 atatat 1652: NULL, 0, &ip6_dad_count, 0,
1653: CTL_NET, PF_INET6, IPPROTO_IPV6,
1654: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1655: sysctl_createv(clog, 0, NULL, NULL,
1656: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1657: CTLTYPE_INT, "auto_flowlabel",
1658: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1659: NULL, 0, &ip6_auto_flowlabel, 0,
1660: CTL_NET, PF_INET6, IPPROTO_IPV6,
1661: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1662: sysctl_createv(clog, 0, NULL, NULL,
1663: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1664: CTLTYPE_INT, "defmcasthlim",
1665: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1666: NULL, 0, &ip6_defmcasthlim, 0,
1667: CTL_NET, PF_INET6, IPPROTO_IPV6,
1668: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.73 atatat 1669: sysctl_createv(clog, 0, NULL, NULL,
1670: CTLFLAG_PERMANENT,
1.74 atatat 1671: CTLTYPE_STRING, "kame_version",
1672: SYSCTL_DESCR("KAME Version"),
1.78 christos 1673: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1674: CTL_NET, PF_INET6, IPPROTO_IPV6,
1675: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1676: sysctl_createv(clog, 0, NULL, NULL,
1677: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1678: CTLTYPE_INT, "use_deprecated",
1679: SYSCTL_DESCR("Allow use of deprecated addresses as "
1680: "source addresses"),
1.70 atatat 1681: NULL, 0, &ip6_use_deprecated, 0,
1682: CTL_NET, PF_INET6, IPPROTO_IPV6,
1683: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1684: sysctl_createv(clog, 0, NULL, NULL,
1685: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1686: CTLTYPE_INT, "rr_prune", NULL,
1687: NULL, 0, &ip6_rr_prune, 0,
1688: CTL_NET, PF_INET6, IPPROTO_IPV6,
1689: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1690: sysctl_createv(clog, 0, NULL, NULL,
1691: CTLFLAG_PERMANENT
1.70 atatat 1692: #ifndef INET6_BINDV6ONLY
1.73 atatat 1693: |CTLFLAG_READWRITE,
1.70 atatat 1694: #endif
1.74 atatat 1695: CTLTYPE_INT, "v6only",
1696: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1697: "to PF_INET sockets"),
1.70 atatat 1698: NULL, 0, &ip6_v6only, 0,
1699: CTL_NET, PF_INET6, IPPROTO_IPV6,
1700: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1701: sysctl_createv(clog, 0, NULL, NULL,
1702: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1703: CTLTYPE_INT, "anonportmin",
1704: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1705: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1706: CTL_NET, PF_INET6, IPPROTO_IPV6,
1707: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1708: sysctl_createv(clog, 0, NULL, NULL,
1709: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1710: CTLTYPE_INT, "anonportmax",
1711: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1712: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1713: CTL_NET, PF_INET6, IPPROTO_IPV6,
1714: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1715: #ifndef IPNOPRIVPORTS
1.73 atatat 1716: sysctl_createv(clog, 0, NULL, NULL,
1717: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1718: CTLTYPE_INT, "lowportmin",
1719: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1720: "to assign"),
1.70 atatat 1721: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1722: CTL_NET, PF_INET6, IPPROTO_IPV6,
1723: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1724: sysctl_createv(clog, 0, NULL, NULL,
1725: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1726: CTLTYPE_INT, "lowportmax",
1727: SYSCTL_DESCR("Highest privileged ephemeral port number "
1728: "to assign"),
1.70 atatat 1729: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1730: CTL_NET, PF_INET6, IPPROTO_IPV6,
1731: IPV6CTL_LOWPORTMAX, CTL_EOL);
1732: #endif /* IPNOPRIVPORTS */
1.73 atatat 1733: sysctl_createv(clog, 0, NULL, NULL,
1734: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.153 christos 1735: CTLTYPE_INT, "auto_linklocal",
1736: SYSCTL_DESCR("Default value of per-interface flag for "
1737: "adding an IPv6 link-local address to "
1738: "interfaces when attached"),
1739: NULL, 0, &ip6_auto_linklocal, 0,
1740: CTL_NET, PF_INET6, IPPROTO_IPV6,
1741: IPV6CTL_AUTO_LINKLOCAL, CTL_EOL);
1742: sysctl_createv(clog, 0, NULL, NULL,
1743: CTLFLAG_PERMANENT|CTLFLAG_READONLY,
1744: CTLTYPE_STRUCT, "addctlpolicy",
1745: SYSCTL_DESCR("Return the current address control"
1746: " policy"),
1747: sysctl_net_inet6_addrctlpolicy, 0, NULL, 0,
1748: CTL_NET, PF_INET6, IPPROTO_IPV6,
1749: IPV6CTL_ADDRCTLPOLICY, CTL_EOL);
1750: sysctl_createv(clog, 0, NULL, NULL,
1751: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1752: CTLTYPE_INT, "use_tempaddr",
1753: SYSCTL_DESCR("Use temporary address"),
1754: NULL, 0, &ip6_use_tempaddr, 0,
1755: CTL_NET, PF_INET6, IPPROTO_IPV6,
1756: CTL_CREATE, CTL_EOL);
1757: sysctl_createv(clog, 0, NULL, NULL,
1758: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.150 roy 1759: CTLTYPE_INT, "prefer_tempaddr",
1760: SYSCTL_DESCR("Prefer temporary address as source "
1761: "address"),
1762: NULL, 0, &ip6_prefer_tempaddr, 0,
1763: CTL_NET, PF_INET6, IPPROTO_IPV6,
1764: CTL_CREATE, CTL_EOL);
1765: sysctl_createv(clog, 0, NULL, NULL,
1766: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1767: CTLTYPE_INT, "temppltime",
1768: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1.208.2.3! martin 1769: sysctl_net_inet6_ip6_temppltime, 0, NULL, 0,
1.83 rpaulo 1770: CTL_NET, PF_INET6, IPPROTO_IPV6,
1771: CTL_CREATE, CTL_EOL);
1772: sysctl_createv(clog, 0, NULL, NULL,
1773: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1774: CTLTYPE_INT, "tempvltime",
1775: SYSCTL_DESCR("valid lifetime of a temporary address"),
1776: NULL, 0, &ip6_temp_valid_lifetime, 0,
1777: CTL_NET, PF_INET6, IPPROTO_IPV6,
1778: CTL_CREATE, CTL_EOL);
1779: sysctl_createv(clog, 0, NULL, NULL,
1780: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1781: CTLTYPE_INT, "maxfrags",
1782: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1783: NULL, 0, &ip6_maxfrags, 0,
1784: CTL_NET, PF_INET6, IPPROTO_IPV6,
1785: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1786: sysctl_createv(clog, 0, NULL, NULL,
1787: CTLFLAG_PERMANENT,
1788: CTLTYPE_STRUCT, "stats",
1789: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1790: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1791: CTL_NET, PF_INET6, IPPROTO_IPV6,
1792: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1793: sysctl_createv(clog, 0, NULL, NULL,
1794: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1795: CTLTYPE_INT, "use_defaultzone",
1796: SYSCTL_DESCR("Whether to use the default scope zones"),
1797: NULL, 0, &ip6_use_defzone, 0,
1798: CTL_NET, PF_INET6, IPPROTO_IPV6,
1799: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1800: sysctl_createv(clog, 0, NULL, NULL,
1801: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1802: CTLTYPE_INT, "mcast_pmtu",
1803: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1804: NULL, 0, &ip6_mcast_pmtu, 0,
1805: CTL_NET, PF_INET6, IPPROTO_IPV6,
1806: CTL_CREATE, CTL_EOL);
1.138 christos 1807: /* anonportalgo RFC6056 subtree */
1.140 christos 1808: const struct sysctlnode *portalgo_node;
1809: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1810: CTLFLAG_PERMANENT,
1811: CTLTYPE_NODE, "anonportalgo",
1812: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1813: NULL, 0, NULL, 0,
1814: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1815: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1816: CTLFLAG_PERMANENT,
1817: CTLTYPE_STRING, "available",
1818: SYSCTL_DESCR("available algorithms"),
1.140 christos 1819: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1820: CTL_CREATE, CTL_EOL);
1.140 christos 1821: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1822: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1823: CTLTYPE_STRING, "selected",
1824: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1825: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1826: CTL_CREATE, CTL_EOL);
1.141 christos 1827: sysctl_createv(clog, 0, &portalgo_node, NULL,
1828: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1829: CTLTYPE_STRUCT, "reserve",
1830: SYSCTL_DESCR("bitmap of reserved ports"),
1831: sysctl_portalgo_reserve6, 0, NULL, 0,
1832: CTL_CREATE, CTL_EOL);
1.139 christos 1833: sysctl_createv(clog, 0, NULL, NULL,
1834: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1835: CTLTYPE_INT, "neighborgcthresh",
1836: SYSCTL_DESCR("Maximum number of entries in neighbor"
1837: " cache"),
1838: NULL, 1, &ip6_neighborgcthresh, 0,
1839: CTL_NET, PF_INET6, IPPROTO_IPV6,
1840: CTL_CREATE, CTL_EOL);
1841: sysctl_createv(clog, 0, NULL, NULL,
1842: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1843: CTLTYPE_INT, "maxifprefixes",
1844: SYSCTL_DESCR("Maximum number of prefixes created by"
1845: " route advertisement per interface"),
1846: NULL, 1, &ip6_maxifprefixes, 0,
1847: CTL_NET, PF_INET6, IPPROTO_IPV6,
1848: CTL_CREATE, CTL_EOL);
1849: sysctl_createv(clog, 0, NULL, NULL,
1850: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1851: CTLTYPE_INT, "maxifdefrouters",
1852: SYSCTL_DESCR("Maximum number of default routers created"
1853: " by route advertisement per interface"),
1854: NULL, 1, &ip6_maxifdefrouters, 0,
1855: CTL_NET, PF_INET6, IPPROTO_IPV6,
1856: CTL_CREATE, CTL_EOL);
1857: sysctl_createv(clog, 0, NULL, NULL,
1858: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1859: CTLTYPE_INT, "maxdynroutes",
1860: SYSCTL_DESCR("Maximum number of routes created via"
1861: " redirect"),
1862: NULL, 1, &ip6_maxdynroutes, 0,
1863: CTL_NET, PF_INET6, IPPROTO_IPV6,
1864: CTL_CREATE, CTL_EOL);
1.2 itojun 1865: }
1.116 thorpej 1866:
1867: void
1868: ip6_statinc(u_int stat)
1869: {
1870:
1871: KASSERT(stat < IP6_NSTATS);
1872: IP6_STATINC(stat);
1873: }
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