Annotation of src/sys/netinet6/ip6_input.c, Revision 1.164.2.3
1.164.2.3! pgoyette 1: /* $NetBSD: ip6_input.c,v 1.171 2016/12/08 05:16:34 ozaki-r 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>
1.164.2.3! pgoyette 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.171 2016/12/08 05:16:34 ozaki-r 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"
1.123 christos 72: #include "opt_compat_netbsd.h"
1.164.2.2 pgoyette 73: #include "opt_net_mpsafe.h"
1.152 pooka 74: #endif
1.2 itojun 75:
76: #include <sys/param.h>
77: #include <sys/systm.h>
78: #include <sys/malloc.h>
79: #include <sys/mbuf.h>
80: #include <sys/domain.h>
81: #include <sys/protosw.h>
82: #include <sys/socket.h>
83: #include <sys/socketvar.h>
84: #include <sys/errno.h>
85: #include <sys/time.h>
86: #include <sys/kernel.h>
87: #include <sys/syslog.h>
88: #include <sys/proc.h>
1.46 simonb 89: #include <sys/sysctl.h>
1.133 tls 90: #include <sys/cprng.h>
1.2 itojun 91:
92: #include <net/if.h>
93: #include <net/if_types.h>
94: #include <net/if_dl.h>
95: #include <net/route.h>
1.148 rmind 96: #include <net/pktqueue.h>
1.15 darrenr 97: #include <net/pfil.h>
1.2 itojun 98:
99: #include <netinet/in.h>
1.9 itojun 100: #include <netinet/in_systm.h>
101: #ifdef INET
102: #include <netinet/ip.h>
1.148 rmind 103: #include <netinet/ip_var.h>
1.9 itojun 104: #include <netinet/ip_icmp.h>
1.45 itojun 105: #endif /* INET */
1.14 itojun 106: #include <netinet/ip6.h>
1.140 christos 107: #include <netinet/portalgo.h>
1.2 itojun 108: #include <netinet6/in6_var.h>
1.11 itojun 109: #include <netinet6/ip6_var.h>
1.116 thorpej 110: #include <netinet6/ip6_private.h>
1.2 itojun 111: #include <netinet6/in6_pcb.h>
1.14 itojun 112: #include <netinet/icmp6.h>
1.81 rpaulo 113: #include <netinet6/scope6_var.h>
1.2 itojun 114: #include <netinet6/in6_ifattach.h>
115: #include <netinet6/nd6.h>
116:
1.142 christos 117: #ifdef IPSEC
1.94 degroote 118: #include <netipsec/ipsec.h>
119: #include <netipsec/ipsec6.h>
120: #include <netipsec/key.h>
1.142 christos 121: #endif /* IPSEC */
1.94 degroote 122:
1.123 christos 123: #ifdef COMPAT_50
124: #include <compat/sys/time.h>
125: #include <compat/sys/socket.h>
126: #endif
127:
1.2 itojun 128: #include <netinet6/ip6protosw.h>
129:
130: #include "faith.h"
131:
1.9 itojun 132: #include <net/net_osdep.h>
133:
1.2 itojun 134: extern struct domain inet6domain;
135:
136: u_char ip6_protox[IPPROTO_MAX];
1.148 rmind 137: pktqueue_t *ip6_pktq __read_mostly;
1.2 itojun 138:
139: int ip6_forward_srcrt; /* XXX */
140: int ip6_sourcecheck; /* XXX */
141: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 142:
1.143 rmind 143: pfil_head_t *inet6_pfil_hook;
1.29 thorpej 144:
1.116 thorpej 145: percpu_t *ip6stat_percpu;
1.2 itojun 146:
1.156 ozaki-r 147: static void ip6_init2(void);
1.148 rmind 148: static void ip6intr(void *);
1.112 dyoung 149: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 150:
1.136 drochner 151: static int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
152: u_int32_t *);
1.111 dyoung 153: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.128 pooka 154: static void sysctl_net_inet6_ip6_setup(struct sysctllog **);
1.2 itojun 155:
1.164.2.2 pgoyette 156: #ifdef NET_MPSAFE
157: #define SOFTNET_LOCK() mutex_enter(softnet_lock)
158: #define SOFTNET_UNLOCK() mutex_exit(softnet_lock)
159: #else
160: #define SOFTNET_LOCK() KASSERT(mutex_owned(softnet_lock))
161: #define SOFTNET_UNLOCK() KASSERT(mutex_owned(softnet_lock))
162: #endif
163:
1.2 itojun 164: /*
165: * IP6 initialization: fill in IP6 protocol switch table.
166: * All protocols not implemented in kernel go to raw IP6 protocol handler.
167: */
168: void
1.114 matt 169: ip6_init(void)
1.2 itojun 170: {
1.78 christos 171: const struct ip6protosw *pr;
1.35 itojun 172: int i;
1.2 itojun 173:
1.163 ozaki-r 174: in6_init();
1.162 ozaki-r 175:
1.128 pooka 176: sysctl_net_inet6_ip6_setup(NULL);
1.78 christos 177: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 178: if (pr == 0)
179: panic("ip6_init");
180: for (i = 0; i < IPPROTO_MAX; i++)
181: ip6_protox[i] = pr - inet6sw;
1.78 christos 182: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
183: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 184: if (pr->pr_domain->dom_family == PF_INET6 &&
185: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
186: ip6_protox[pr->pr_protocol] = pr - inet6sw;
1.148 rmind 187:
1.149 ozaki-r 188: ip6_pktq = pktq_create(IFQ_MAXLEN, ip6intr, NULL);
1.148 rmind 189: KASSERT(ip6_pktq != NULL);
190:
1.81 rpaulo 191: scope6_init();
192: addrsel_policy_init();
1.2 itojun 193: nd6_init();
194: frag6_init();
1.133 tls 195: ip6_desync_factor = cprng_fast32() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 196:
1.156 ozaki-r 197: ip6_init2();
1.98 liamjfoy 198: #ifdef GATEWAY
1.99 liamjfoy 199: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 200: #endif
1.29 thorpej 201: /* Register our Packet Filter hook. */
1.143 rmind 202: inet6_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET6);
203: KASSERT(inet6_pfil_hook != NULL);
1.116 thorpej 204:
205: ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS);
1.2 itojun 206: }
207:
208: static void
1.156 ozaki-r 209: ip6_init2(void)
1.2 itojun 210: {
211:
1.83 rpaulo 212: /* timer for regeneranation of temporary addresses randomize ID */
1.118 ad 213: callout_init(&in6_tmpaddrtimer_ch, CALLOUT_MPSAFE);
1.83 rpaulo 214: callout_reset(&in6_tmpaddrtimer_ch,
215: (ip6_temp_preferred_lifetime - ip6_desync_factor -
216: ip6_temp_regen_advance) * hz,
217: in6_tmpaddrtimer, NULL);
1.2 itojun 218: }
219:
220: /*
221: * IP6 input interrupt handling. Just pass the packet to ip6_input.
222: */
1.148 rmind 223: static void
224: ip6intr(void *arg __unused)
1.2 itojun 225: {
226: struct mbuf *m;
227:
1.164.2.2 pgoyette 228: #ifndef NET_MPSAFE
1.118 ad 229: mutex_enter(softnet_lock);
1.164.2.2 pgoyette 230: #endif
1.148 rmind 231: while ((m = pktq_dequeue(ip6_pktq)) != NULL) {
1.160 ozaki-r 232: struct psref psref;
233: struct ifnet *rcvif = m_get_rcvif_psref(m, &psref);
1.148 rmind 234:
1.160 ozaki-r 235: if (rcvif == NULL) {
236: m_freem(m);
237: continue;
238: }
1.148 rmind 239: /*
240: * Drop the packet if IPv6 is disabled on the interface.
241: */
1.160 ozaki-r 242: if ((ND_IFINFO(rcvif)->flags & ND6_IFF_IFDISABLED)) {
243: m_put_rcvif_psref(rcvif, &psref);
1.83 rpaulo 244: m_freem(m);
1.148 rmind 245: continue;
1.83 rpaulo 246: }
1.160 ozaki-r 247: ip6_input(m, rcvif);
248: m_put_rcvif_psref(rcvif, &psref);
1.2 itojun 249: }
1.164.2.2 pgoyette 250: #ifndef NET_MPSAFE
1.118 ad 251: mutex_exit(softnet_lock);
1.164.2.2 pgoyette 252: #endif
1.2 itojun 253: }
254:
1.103 dyoung 255: extern struct route ip6_forward_rt;
1.2 itojun 256:
257: void
1.160 ozaki-r 258: ip6_input(struct mbuf *m, struct ifnet *rcvif)
1.2 itojun 259: {
1.9 itojun 260: struct ip6_hdr *ip6;
1.105 dyoung 261: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 262: u_int32_t plen;
1.5 itojun 263: u_int32_t rtalert = ~0;
1.104 yamt 264: int nxt, ours = 0, rh_present = 0;
1.9 itojun 265: struct ifnet *deliverifp = NULL;
1.64 itojun 266: int srcrt = 0;
1.164.2.3! pgoyette 267: struct rtentry *rt = NULL;
1.105 dyoung 268: union {
269: struct sockaddr dst;
270: struct sockaddr_in6 dst6;
271: } u;
1.2 itojun 272:
273: /*
1.81 rpaulo 274: * make sure we don't have onion peering information into m_tag.
275: */
276: ip6_delaux(m);
277:
278: /*
1.44 itojun 279: * mbuf statistics
1.2 itojun 280: */
281: if (m->m_flags & M_EXT) {
282: if (m->m_next)
1.116 thorpej 283: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 284: else
1.116 thorpej 285: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 286: } else {
1.115 thorpej 287: #define M2MMAX 32
1.2 itojun 288: if (m->m_next) {
1.159 ozaki-r 289: if (m->m_flags & M_LOOP)
1.116 thorpej 290: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.159 ozaki-r 291: else if (rcvif->if_index < M2MMAX)
292: IP6_STATINC(IP6_STAT_M2M + rcvif->if_index);
293: else
1.116 thorpej 294: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 295: } else
1.116 thorpej 296: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 297: #undef M2MMAX
1.2 itojun 298: }
299:
1.159 ozaki-r 300: in6_ifstat_inc(rcvif, ifs6_in_receive);
1.116 thorpej 301: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 302:
1.57 thorpej 303: /*
304: * If the IPv6 header is not aligned, slurp it up into a new
305: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 306: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 307: * IPv6 header is in the first mbuf of the chain.
308: */
1.97 christos 309: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 310: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
311: (max_linkhdr + 3) & ~3)) == NULL) {
312: /* XXXJRT new stat, please */
1.116 thorpej 313: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 314: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.57 thorpej 315: return;
316: }
317: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
1.55 itojun 318: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 319: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 320: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.9 itojun 321: return;
322: }
1.2 itojun 323: }
324:
325: ip6 = mtod(m, struct ip6_hdr *);
326:
327: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 328: IP6_STATINC(IP6_STAT_BADVERS);
1.159 ozaki-r 329: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 330: goto bad;
331: }
1.15 darrenr 332:
1.98 liamjfoy 333: /*
334: * Assume that we can create a fast-forward IP flow entry
335: * based on this packet.
336: */
337: m->m_flags |= M_CANFASTFWD;
338:
1.15 darrenr 339: /*
340: * Run through list of hooks for input packets. If there are any
341: * filters which require that additional packets in the flow are
342: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
343: * Note that filters must _never_ set this flag, as another filter
344: * in the list may have previously cleared it.
345: */
1.39 itojun 346: /*
347: * let ipfilter look at packet on the wire,
348: * not the decapsulated packet.
349: */
1.142 christos 350: #if defined(IPSEC)
1.146 christos 351: if (!ipsec_used || !ipsec_indone(m))
1.39 itojun 352: #else
353: if (1)
354: #endif
355: {
1.64 itojun 356: struct in6_addr odst;
357:
358: odst = ip6->ip6_dst;
1.159 ozaki-r 359: if (pfil_run_hooks(inet6_pfil_hook, &m, rcvif, PFIL_IN) != 0)
1.39 itojun 360: return;
361: if (m == NULL)
362: return;
363: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 364: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 365: }
1.15 darrenr 366:
1.116 thorpej 367: IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt);
1.2 itojun 368:
1.30 thorpej 369: #ifdef ALTQ
1.164.2.2 pgoyette 370: if (altq_input != NULL) {
371: SOFTNET_LOCK();
372: if ((*altq_input)(m, AF_INET6) == 0) {
373: SOFTNET_UNLOCK();
374: /* packet is dropped by traffic conditioner */
375: return;
376: }
377: SOFTNET_UNLOCK();
1.9 itojun 378: }
379: #endif
380:
1.2 itojun 381: /*
1.44 itojun 382: * Check against address spoofing/corruption.
1.2 itojun 383: */
384: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
385: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 386: /*
387: * XXX: "badscope" is not very suitable for a multicast source.
388: */
1.116 thorpej 389: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 390: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.2 itojun 391: goto bad;
392: }
1.13 itojun 393: /*
1.44 itojun 394: * The following check is not documented in specs. A malicious
395: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
396: * and bypass security checks (act as if it was from 127.0.0.1 by using
397: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 398: *
1.44 itojun 399: * This check chokes if we are in an SIIT cloud. As none of BSDs
400: * support IPv4-less kernel compilation, we cannot support SIIT
401: * environment at all. So, it makes more sense for us to reject any
402: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 403: * partial support for SIIT environment.
1.13 itojun 404: */
405: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
406: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 407: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 408: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 409: goto bad;
410: }
1.17 itojun 411: #if 0
1.13 itojun 412: /*
1.17 itojun 413: * Reject packets with IPv4 compatible addresses (auto tunnel).
414: *
415: * The code forbids auto tunnel relay case in RFC1933 (the check is
416: * stronger than RFC1933). We may want to re-enable it if mech-xx
417: * is revised to forbid relaying case.
1.13 itojun 418: */
419: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
420: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
1.116 thorpej 421: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 422: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 423: goto bad;
424: }
425: #endif
1.35 itojun 426:
1.2 itojun 427: /*
1.82 yamt 428: * Disambiguate address scope zones (if there is ambiguity).
429: * We first make sure that the original source or destination address
430: * is not in our internal form for scoped addresses. Such addresses
431: * are not necessarily invalid spec-wise, but we cannot accept them due
432: * to the usage conflict.
433: * in6_setscope() then also checks and rejects the cases where src or
434: * dst are the loopback address and the receiving interface
435: * is not loopback.
436: */
1.88 bouyer 437: if (__predict_false(
438: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
439: goto bad;
440: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 441: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 442: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 443: goto bad;
444: }
1.159 ozaki-r 445: if (in6_setscope(&ip6->ip6_src, rcvif, NULL) ||
446: in6_setscope(&ip6->ip6_dst, rcvif, NULL)) {
1.116 thorpej 447: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 448: goto bad;
449: }
450:
1.164.2.3! pgoyette 451: ro = percpu_getref(ip6_forward_rt_percpu);
1.82 yamt 452: /*
1.2 itojun 453: * Multicast check
454: */
455: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
456: struct in6_multi *in6m = 0;
1.9 itojun 457:
1.159 ozaki-r 458: in6_ifstat_inc(rcvif, ifs6_in_mcast);
1.2 itojun 459: /*
460: * See if we belong to the destination multicast group on the
461: * arrival interface.
462: */
1.159 ozaki-r 463: IN6_LOOKUP_MULTI(ip6->ip6_dst, rcvif, in6m);
1.2 itojun 464: if (in6m)
465: ours = 1;
466: else if (!ip6_mrouter) {
1.116 thorpej 467: uint64_t *ip6s = IP6_STAT_GETREF();
468: ip6s[IP6_STAT_NOTMEMBER]++;
469: ip6s[IP6_STAT_CANTFORWARD]++;
470: IP6_STAT_PUTREF();
1.159 ozaki-r 471: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.164.2.3! pgoyette 472: goto bad_unref;
1.2 itojun 473: }
1.159 ozaki-r 474: deliverifp = rcvif;
1.2 itojun 475: goto hbhcheck;
476: }
477:
1.105 dyoung 478: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
479:
1.2 itojun 480: /*
481: * Unicast check
482: */
1.164.2.3! pgoyette 483: rt = rtcache_lookup2(ro, &u.dst, 1, &hit);
1.105 dyoung 484: if (hit)
1.116 thorpej 485: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 486: else
1.116 thorpej 487: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 488:
1.109 dyoung 489: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 490:
491: /*
492: * Accept the packet if the forwarding interface to the destination
493: * according to the routing table is the loopback interface,
494: * unless the associated route has a gateway.
495: * Note that this approach causes to accept a packet if there is a
496: * route to the loopback interface for the destination of the packet.
497: * But we think it's even useful in some situations, e.g. when using
498: * a special daemon which wants to intercept the packet.
499: */
1.105 dyoung 500: if (rt != NULL &&
501: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.2 itojun 502: #if 0
503: /*
504: * The check below is redundant since the comparison of
505: * the destination and the key of the rtentry has
506: * already done through looking up the routing table.
507: */
1.109 dyoung 508: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 509: #endif
1.105 dyoung 510: rt->rt_ifp->if_type == IFT_LOOP) {
511: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 512: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
513: m->m_flags |= M_ANYCAST6;
1.24 itojun 514: /*
515: * packets to a tentative, duplicated, or somehow invalid
516: * address must not be accepted.
517: */
1.2 itojun 518: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 519: /* this address is ready */
1.2 itojun 520: ours = 1;
1.9 itojun 521: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 522: goto hbhcheck;
523: } else {
1.24 itojun 524: /* address is not ready, so discard the packet. */
1.157 ozaki-r 525: nd6log(LOG_INFO, "packet to an unready address %s->%s\n",
1.24 itojun 526: ip6_sprintf(&ip6->ip6_src),
1.157 ozaki-r 527: ip6_sprintf(&ip6->ip6_dst));
1.24 itojun 528:
1.164.2.3! pgoyette 529: goto bad_unref;
1.2 itojun 530: }
531: }
532:
533: /*
1.55 itojun 534: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 535: */
536: #if defined(NFAITH) && 0 < NFAITH
537: if (ip6_keepfaith) {
1.105 dyoung 538: if (rt != NULL && rt->rt_ifp != NULL &&
539: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 540: /* XXX do we need more sanity checks? */
541: ours = 1;
1.105 dyoung 542: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 543: goto hbhcheck;
544: }
545: }
546: #endif
547:
548: #if 0
549: {
550: /*
551: * Last resort: check in6_ifaddr for incoming interface.
552: * The code is here until I update the "goto ours hack" code above
553: * working right.
554: */
555: struct ifaddr *ifa;
1.164 ozaki-r 556: IFADDR_READER_FOREACH(ifa, rcvif) {
1.9 itojun 557: if (ifa->ifa_addr->sa_family != AF_INET6)
558: continue;
559: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
560: ours = 1;
561: deliverifp = ifa->ifa_ifp;
1.2 itojun 562: goto hbhcheck;
563: }
564: }
1.9 itojun 565: }
1.2 itojun 566: #endif
567:
568: /*
569: * Now there is no reason to process the packet if it's not our own
570: * and we're not a router.
571: */
572: if (!ip6_forwarding) {
1.116 thorpej 573: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.159 ozaki-r 574: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.164.2.3! pgoyette 575: goto bad_unref;
1.2 itojun 576: }
577:
578: hbhcheck:
579: /*
1.81 rpaulo 580: * record address information into m_tag, if we don't have one yet.
581: * note that we are unable to record it, if the address is not listed
582: * as our interface address (e.g. multicast addresses, addresses
583: * within FAITH prefixes and such).
584: */
1.111 dyoung 585: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 586: struct in6_ifaddr *ia6;
1.164.2.1 pgoyette 587: int s = pserialize_read_enter();
1.81 rpaulo 588:
589: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.164.2.1 pgoyette 590: /* Depends on ip6_setdstifaddr never sleep */
1.111 dyoung 591: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
592: /*
593: * XXX maybe we should drop the packet here,
594: * as we could not provide enough information
595: * to the upper layers.
596: */
1.81 rpaulo 597: }
1.164.2.1 pgoyette 598: pserialize_read_exit(s);
1.81 rpaulo 599: }
600:
601: /*
1.2 itojun 602: * Process Hop-by-Hop options header if it's contained.
603: * m may be modified in ip6_hopopts_input().
604: * If a JumboPayload option is included, plen will also be modified.
605: */
606: plen = (u_int32_t)ntohs(ip6->ip6_plen);
607: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 608: struct ip6_hbh *hbh;
609:
610: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
611: #if 0 /*touches NULL pointer*/
1.159 ozaki-r 612: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.9 itojun 613: #endif
1.164.2.3! pgoyette 614: rtcache_unref(rt, ro);
! 615: percpu_putref(ip6_forward_rt_percpu);
1.2 itojun 616: return; /* m have already been freed */
1.9 itojun 617: }
1.22 itojun 618:
1.2 itojun 619: /* adjust pointer */
620: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 621:
622: /*
1.49 itojun 623: * if the payload length field is 0 and the next header field
1.22 itojun 624: * indicates Hop-by-Hop Options header, then a Jumbo Payload
625: * option MUST be included.
626: */
627: if (ip6->ip6_plen == 0 && plen == 0) {
628: /*
629: * Note that if a valid jumbo payload option is
1.83 rpaulo 630: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 631: * (non-zero) payload length to the variable plen.
1.22 itojun 632: */
1.116 thorpej 633: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.159 ozaki-r 634: in6_ifstat_inc(rcvif, ifs6_in_discard);
635: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.22 itojun 636: icmp6_error(m, ICMP6_PARAM_PROB,
637: ICMP6_PARAMPROB_HEADER,
1.97 christos 638: (char *)&ip6->ip6_plen - (char *)ip6);
1.164.2.3! pgoyette 639: rtcache_unref(rt, ro);
! 640: percpu_putref(ip6_forward_rt_percpu);
1.22 itojun 641: return;
642: }
1.9 itojun 643: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
644: sizeof(struct ip6_hbh));
645: if (hbh == NULL) {
1.116 thorpej 646: IP6_STATINC(IP6_STAT_TOOSHORT);
1.164.2.3! pgoyette 647: rtcache_unref(rt, ro);
! 648: percpu_putref(ip6_forward_rt_percpu);
1.9 itojun 649: return;
650: }
1.57 thorpej 651: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 652: nxt = hbh->ip6h_nxt;
1.2 itojun 653:
654: /*
655: * accept the packet if a router alert option is included
656: * and we act as an IPv6 router.
657: */
1.5 itojun 658: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 659: ours = 1;
660: } else
661: nxt = ip6->ip6_nxt;
662:
663: /*
664: * Check that the amount of data in the buffers
665: * is as at least much as the IPv6 header would have us expect.
666: * Trim mbufs if longer than we expect.
667: * Drop packet if shorter than we expect.
668: */
669: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 670: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 671: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.164.2.3! pgoyette 672: goto bad_unref;
1.2 itojun 673: }
674: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
675: if (m->m_len == m->m_pkthdr.len) {
676: m->m_len = sizeof(struct ip6_hdr) + plen;
677: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
678: } else
679: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
680: }
681:
682: /*
683: * Forward if desirable.
684: */
685: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
686: /*
687: * If we are acting as a multicast router, all
688: * incoming multicast packets are passed to the
689: * kernel-level multicast forwarding function.
690: * The packet is returned (relatively) intact; if
691: * ip6_mforward() returns a non-zero value, the packet
692: * must be discarded, else it may be accepted below.
693: */
1.164.2.2 pgoyette 694: if (ip6_mrouter != NULL) {
695: int error;
696:
697: SOFTNET_LOCK();
698: error = ip6_mforward(ip6, rcvif, m);
699: SOFTNET_UNLOCK();
700:
701: if (error != 0) {
1.164.2.3! pgoyette 702: rtcache_unref(rt, ro);
! 703: percpu_putref(ip6_forward_rt_percpu);
1.164.2.2 pgoyette 704: IP6_STATINC(IP6_STAT_CANTFORWARD);
705: goto bad;
706: }
1.2 itojun 707: }
1.164.2.2 pgoyette 708: if (!ours)
1.164.2.3! pgoyette 709: goto bad_unref;
1.22 itojun 710: } else if (!ours) {
1.164.2.3! pgoyette 711: rtcache_unref(rt, ro);
! 712: percpu_putref(ip6_forward_rt_percpu);
1.64 itojun 713: ip6_forward(m, srcrt);
1.2 itojun 714: return;
1.56 itojun 715: }
1.25 itojun 716:
717: ip6 = mtod(m, struct ip6_hdr *);
718:
719: /*
720: * Malicious party may be able to use IPv4 mapped addr to confuse
721: * tcp/udp stack and bypass security checks (act as if it was from
722: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
723: *
724: * For SIIT end node behavior, you may want to disable the check.
725: * However, you will become vulnerable to attacks using IPv4 mapped
726: * source.
727: */
728: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
729: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 730: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 731: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.164.2.3! pgoyette 732: goto bad_unref;
1.25 itojun 733: }
1.2 itojun 734:
735: /*
736: * Tell launch routine the next header
737: */
1.12 itojun 738: #ifdef IFA_STATS
1.28 itojun 739: if (deliverifp != NULL) {
1.9 itojun 740: struct in6_ifaddr *ia6;
1.164.2.1 pgoyette 741: int s = pserialize_read_enter();
1.9 itojun 742: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
743: if (ia6)
744: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
1.164.2.1 pgoyette 745: pserialize_read_exit(s);
1.9 itojun 746: }
747: #endif
1.116 thorpej 748: IP6_STATINC(IP6_STAT_DELIVERED);
1.9 itojun 749: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 750: nest = 0;
1.40 itojun 751:
1.164.2.3! pgoyette 752: if (rt != NULL) {
! 753: rtcache_unref(rt, ro);
! 754: rt = NULL;
! 755: }
! 756: percpu_putref(ip6_forward_rt_percpu);
! 757:
1.104 yamt 758: rh_present = 0;
1.2 itojun 759: while (nxt != IPPROTO_DONE) {
760: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.116 thorpej 761: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.159 ozaki-r 762: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 763: goto bad;
764: }
1.8 itojun 765:
766: /*
767: * protection against faulty packet - there should be
768: * more sanity checks in header chain processing.
769: */
770: if (m->m_pkthdr.len < off) {
1.116 thorpej 771: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 772: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.8 itojun 773: goto bad;
774: }
775:
1.104 yamt 776: if (nxt == IPPROTO_ROUTING) {
777: if (rh_present++) {
1.159 ozaki-r 778: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.116 thorpej 779: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 780: goto bad;
781: }
782: }
783:
1.142 christos 784: #ifdef IPSEC
1.146 christos 785: if (ipsec_used) {
1.94 degroote 786: /*
1.146 christos 787: * enforce IPsec policy checking if we are seeing last
788: * header. note that we do not visit this with
789: * protocols with pcb layer code - like udp/tcp/raw ip.
1.94 degroote 790: */
1.146 christos 791: if ((inet6sw[ip_protox[nxt]].pr_flags
792: & PR_LASTHDR) != 0) {
1.164.2.2 pgoyette 793: int error;
794:
795: SOFTNET_LOCK();
796: error = ipsec6_input(m);
797: SOFTNET_UNLOCK();
1.146 christos 798: if (error)
799: goto bad;
800: }
1.94 degroote 801: }
1.142 christos 802: #endif /* IPSEC */
1.94 degroote 803:
1.164.2.2 pgoyette 804: SOFTNET_LOCK();
1.2 itojun 805: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
1.164.2.2 pgoyette 806: SOFTNET_UNLOCK();
1.2 itojun 807: }
808: return;
1.164.2.3! pgoyette 809:
! 810: bad_unref:
! 811: rtcache_unref(rt, ro);
! 812: percpu_putref(ip6_forward_rt_percpu);
1.2 itojun 813: bad:
814: m_freem(m);
1.164.2.3! pgoyette 815: return;
1.2 itojun 816: }
817:
818: /*
1.81 rpaulo 819: * set/grab in6_ifaddr correspond to IPv6 destination address.
820: */
821: static struct m_tag *
1.112 dyoung 822: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 823: {
824: struct m_tag *mtag;
1.144 christos 825: struct ip6aux *ip6a;
1.81 rpaulo 826:
827: mtag = ip6_addaux(m);
1.144 christos 828: if (mtag == NULL)
829: return NULL;
1.112 dyoung 830:
1.144 christos 831: ip6a = (struct ip6aux *)(mtag + 1);
832: if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) {
833: IP6_STATINC(IP6_STAT_BADSCOPE);
834: return NULL;
1.112 dyoung 835: }
1.144 christos 836:
837: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
838: ip6a->ip6a_flags = ia->ia6_flags;
839: return mtag;
1.81 rpaulo 840: }
841:
1.112 dyoung 842: const struct ip6aux *
1.107 christos 843: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 844: {
845: struct m_tag *mtag;
846:
847: mtag = ip6_findaux(m);
1.112 dyoung 848: if (mtag != NULL)
849: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 850: else
851: return NULL;
852: }
853:
854: /*
1.2 itojun 855: * Hop-by-Hop options header processing. If a valid jumbo payload option is
856: * included, the real payload length will be stored in plenp.
1.107 christos 857: *
858: * rtalertp - XXX: should be stored more smart way
1.2 itojun 859: */
1.136 drochner 860: int
1.107 christos 861: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
862: struct mbuf **mp, int *offp)
1.2 itojun 863: {
1.35 itojun 864: struct mbuf *m = *mp;
1.2 itojun 865: int off = *offp, hbhlen;
866: struct ip6_hbh *hbh;
867:
868: /* validation of the length of the header */
1.9 itojun 869: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
870: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
871: if (hbh == NULL) {
1.116 thorpej 872: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 873: return -1;
874: }
875: hbhlen = (hbh->ip6h_len + 1) << 3;
876: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
877: hbhlen);
878: if (hbh == NULL) {
1.116 thorpej 879: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 880: return -1;
881: }
1.57 thorpej 882: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 883: off += hbhlen;
884: hbhlen -= sizeof(struct ip6_hbh);
885:
886: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
887: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 888: return (-1);
1.2 itojun 889:
890: *offp = off;
891: *mp = m;
1.58 itojun 892: return (0);
1.2 itojun 893: }
894:
895: /*
896: * Search header for all Hop-by-hop options and process each option.
897: * This function is separate from ip6_hopopts_input() in order to
898: * handle a case where the sending node itself process its hop-by-hop
899: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 900: *
901: * The function assumes that hbh header is located right after the IPv6 header
902: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
903: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 904: */
1.136 drochner 905: static int
1.107 christos 906: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
907: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 908: {
909: struct ip6_hdr *ip6;
910: int optlen = 0;
911: u_int8_t *opt = opthead;
912: u_int16_t rtalert_val;
1.22 itojun 913: u_int32_t jumboplen;
1.55 itojun 914: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 915:
916: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 917: switch (*opt) {
918: case IP6OPT_PAD1:
919: optlen = 1;
920: break;
921: case IP6OPT_PADN:
922: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 923: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 924: goto bad;
925: }
926: optlen = *(opt + 1) + 2;
927: break;
928: case IP6OPT_RTALERT:
929: /* XXX may need check for alignment */
930: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 931: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 932: goto bad;
933: }
934: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 935: /* XXX stat */
936: icmp6_error(m, ICMP6_PARAM_PROB,
937: ICMP6_PARAMPROB_HEADER,
938: erroff + opt + 1 - opthead);
939: return (-1);
1.35 itojun 940: }
941: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 942: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 943: *rtalertp = ntohs(rtalert_val);
944: break;
945: case IP6OPT_JUMBO:
1.22 itojun 946: /* XXX may need check for alignment */
947: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 948: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 949: goto bad;
950: }
1.35 itojun 951: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 952: /* XXX stat */
953: icmp6_error(m, ICMP6_PARAM_PROB,
954: ICMP6_PARAMPROB_HEADER,
955: erroff + opt + 1 - opthead);
956: return (-1);
1.35 itojun 957: }
1.22 itojun 958: optlen = IP6OPT_JUMBO_LEN;
959:
960: /*
961: * IPv6 packets that have non 0 payload length
1.35 itojun 962: * must not contain a jumbo payload option.
1.22 itojun 963: */
964: ip6 = mtod(m, struct ip6_hdr *);
965: if (ip6->ip6_plen) {
1.116 thorpej 966: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 967: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 968: ICMP6_PARAMPROB_HEADER,
969: erroff + opt - opthead);
970: return (-1);
1.22 itojun 971: }
1.2 itojun 972:
1.22 itojun 973: /*
974: * We may see jumbolen in unaligned location, so
975: * we'd need to perform bcopy().
976: */
1.126 tsutsui 977: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 978: jumboplen = (u_int32_t)htonl(jumboplen);
979:
980: #if 1
981: /*
982: * if there are multiple jumbo payload options,
983: * *plenp will be non-zero and the packet will be
984: * rejected.
985: * the behavior may need some debate in ipngwg -
986: * multiple options does not make sense, however,
987: * there's no explicit mention in specification.
988: */
989: if (*plenp != 0) {
1.116 thorpej 990: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 991: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 992: ICMP6_PARAMPROB_HEADER,
993: erroff + opt + 2 - opthead);
994: return (-1);
1.22 itojun 995: }
1.8 itojun 996: #endif
1.2 itojun 997:
1.22 itojun 998: /*
999: * jumbo payload length must be larger than 65535.
1000: */
1001: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 1002: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 1003: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1004: ICMP6_PARAMPROB_HEADER,
1005: erroff + opt + 2 - opthead);
1006: return (-1);
1.22 itojun 1007: }
1008: *plenp = jumboplen;
1009:
1010: break;
1.35 itojun 1011: default: /* unknown option */
1012: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 1013: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 1014: goto bad;
1015: }
1.55 itojun 1016: optlen = ip6_unknown_opt(opt, m,
1017: erroff + opt - opthead);
1018: if (optlen == -1)
1019: return (-1);
1.35 itojun 1020: optlen += 2;
1021: break;
1.2 itojun 1022: }
1023: }
1024:
1.55 itojun 1025: return (0);
1.2 itojun 1026:
1027: bad:
1028: m_freem(m);
1.55 itojun 1029: return (-1);
1.2 itojun 1030: }
1031:
1032: /*
1033: * Unknown option processing.
1034: * The third argument `off' is the offset from the IPv6 header to the option,
1035: * which is necessary if the IPv6 header the and option header and IPv6 header
1036: * is not continuous in order to return an ICMPv6 error.
1037: */
1038: int
1.107 christos 1039: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1040: {
1041: struct ip6_hdr *ip6;
1042:
1.35 itojun 1043: switch (IP6OPT_TYPE(*optp)) {
1044: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1045: return ((int)*(optp + 1));
1.35 itojun 1046: case IP6OPT_TYPE_DISCARD: /* silently discard */
1047: m_freem(m);
1.58 itojun 1048: return (-1);
1.35 itojun 1049: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 1050: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1051: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1052: return (-1);
1.35 itojun 1053: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 1054: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1055: ip6 = mtod(m, struct ip6_hdr *);
1056: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1057: (m->m_flags & (M_BCAST|M_MCAST)))
1058: m_freem(m);
1059: else
1060: icmp6_error(m, ICMP6_PARAM_PROB,
1061: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1062: return (-1);
1.2 itojun 1063: }
1064:
1065: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1066: return (-1);
1.2 itojun 1067: }
1068:
1069: /*
1.9 itojun 1070: * Create the "control" list for this pcb.
1071: *
1072: * The routine will be called from upper layer handlers like tcp6_input().
1073: * Thus the routine assumes that the caller (tcp6_input) have already
1074: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1075: * very first mbuf on the mbuf chain.
1076: * We may want to add some infinite loop prevention or sanity checks for safety.
1077: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1078: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1079: */
1080: void
1.107 christos 1081: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1082: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1083: {
1.85 rpaulo 1084: #ifdef RFC2292
1085: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1086: #else
1087: #define IS2292(x, y) (y)
1088: #endif
1089:
1.123 christos 1090: if (in6p->in6p_socket->so_options & SO_TIMESTAMP
1091: #ifdef SO_OTIMESTAMP
1092: || in6p->in6p_socket->so_options & SO_OTIMESTAMP
1093: #endif
1094: ) {
1.2 itojun 1095: struct timeval tv;
1096:
1097: microtime(&tv);
1.123 christos 1098: #ifdef SO_OTIMESTAMP
1099: if (in6p->in6p_socket->so_options & SO_OTIMESTAMP) {
1100: struct timeval50 tv50;
1101: timeval_to_timeval50(&tv, &tv50);
1102: *mp = sbcreatecontrol((void *) &tv50, sizeof(tv50),
1103: SCM_OTIMESTAMP, SOL_SOCKET);
1104: } else
1105: #endif
1.97 christos 1106: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1107: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1108: if (*mp)
1109: mp = &(*mp)->m_next;
1110: }
1.87 rpaulo 1111:
1112: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1113: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1114: return;
1115:
1.2 itojun 1116: /* RFC 2292 sec. 5 */
1.35 itojun 1117: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1118: struct in6_pktinfo pi6;
1.85 rpaulo 1119:
1.126 tsutsui 1120: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1121: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.160 ozaki-r 1122: pi6.ipi6_ifindex = m->m_pkthdr.rcvif_index;
1.97 christos 1123: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1124: sizeof(struct in6_pktinfo),
1125: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1126: if (*mp)
1127: mp = &(*mp)->m_next;
1128: }
1.85 rpaulo 1129:
1.2 itojun 1130: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1131: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1132:
1.97 christos 1133: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1134: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1135: if (*mp)
1136: mp = &(*mp)->m_next;
1137: }
1138:
1139: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1140: u_int32_t flowinfo;
1141: int tclass;
1142:
1143: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1144: flowinfo >>= 20;
1145:
1146: tclass = flowinfo & 0xff;
1.97 christos 1147: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1148: IPV6_TCLASS, IPPROTO_IPV6);
1149:
1.2 itojun 1150: if (*mp)
1151: mp = &(*mp)->m_next;
1152: }
1153:
1154: /*
1.75 itojun 1155: * IPV6_HOPOPTS socket option. Recall that we required super-user
1156: * privilege for the option (see ip6_ctloutput), but it might be too
1157: * strict, since there might be some hop-by-hop options which can be
1158: * returned to normal user.
1.85 rpaulo 1159: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1160: */
1.75 itojun 1161: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1162: /*
1163: * Check if a hop-by-hop options header is contatined in the
1164: * received packet, and if so, store the options as ancillary
1165: * data. Note that a hop-by-hop options header must be
1166: * just after the IPv6 header, which fact is assured through
1167: * the IPv6 input processing.
1168: */
1.78 christos 1169: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1170: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1171: struct ip6_hbh *hbh;
1172: int hbhlen;
1.62 itojun 1173: struct mbuf *ext;
1.9 itojun 1174:
1.62 itojun 1175: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1176: xip6->ip6_nxt);
1.62 itojun 1177: if (ext == NULL) {
1.116 thorpej 1178: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1179: return;
1180: }
1.62 itojun 1181: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1182: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1183: if (hbhlen != ext->m_len) {
1184: m_freem(ext);
1.116 thorpej 1185: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1186: return;
1187: }
1.2 itojun 1188:
1189: /*
1190: * XXX: We copy whole the header even if a jumbo
1191: * payload option is included, which option is to
1192: * be removed before returning in the RFC 2292.
1.85 rpaulo 1193: * Note: this constraint is removed in RFC3542.
1.2 itojun 1194: */
1.97 christos 1195: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1196: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1197: IPPROTO_IPV6);
1.2 itojun 1198: if (*mp)
1199: mp = &(*mp)->m_next;
1.62 itojun 1200: m_freem(ext);
1.2 itojun 1201: }
1202: }
1203:
1204: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1205: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1206: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1207: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1208:
1209: /*
1210: * Search for destination options headers or routing
1211: * header(s) through the header chain, and stores each
1212: * header as ancillary data.
1213: * Note that the order of the headers remains in
1214: * the chain of ancillary data.
1215: */
1.86 rpaulo 1216: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1217: struct ip6_ext *ip6e = NULL;
1.9 itojun 1218: int elen;
1.62 itojun 1219: struct mbuf *ext = NULL;
1.9 itojun 1220:
1.62 itojun 1221: /*
1222: * if it is not an extension header, don't try to
1223: * pull it from the chain.
1224: */
1225: switch (nxt) {
1226: case IPPROTO_DSTOPTS:
1227: case IPPROTO_ROUTING:
1228: case IPPROTO_HOPOPTS:
1229: case IPPROTO_AH: /* is it possible? */
1230: break;
1231: default:
1232: goto loopend;
1233: }
1234:
1235: ext = ip6_pullexthdr(m, off, nxt);
1236: if (ext == NULL) {
1.116 thorpej 1237: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1238: return;
1239: }
1.62 itojun 1240: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1241: if (nxt == IPPROTO_AH)
1242: elen = (ip6e->ip6e_len + 2) << 2;
1243: else
1244: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1245: if (elen != ext->m_len) {
1246: m_freem(ext);
1.116 thorpej 1247: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1248: return;
1249: }
1.57 thorpej 1250: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1251:
1.35 itojun 1252: switch (nxt) {
1.62 itojun 1253: case IPPROTO_DSTOPTS:
1.127 martin 1254: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1255: break;
1256:
1.97 christos 1257: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1258: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1259: IPPROTO_IPV6);
1.35 itojun 1260: if (*mp)
1261: mp = &(*mp)->m_next;
1262: break;
1263:
1264: case IPPROTO_ROUTING:
1.127 martin 1265: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1266: break;
1267:
1.97 christos 1268: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1269: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1270: IPPROTO_IPV6);
1.35 itojun 1271: if (*mp)
1272: mp = &(*mp)->m_next;
1273: break;
1274:
1.62 itojun 1275: case IPPROTO_HOPOPTS:
1276: case IPPROTO_AH: /* is it possible? */
1277: break;
1278:
1.35 itojun 1279: default:
1280: /*
1.62 itojun 1281: * other cases have been filtered in the above.
1282: * none will visit this case. here we supply
1283: * the code just in case (nxt overwritten or
1284: * other cases).
1.35 itojun 1285: */
1.62 itojun 1286: m_freem(ext);
1.35 itojun 1287: goto loopend;
1288:
1.2 itojun 1289: }
1290:
1291: /* proceed with the next header. */
1.9 itojun 1292: off += elen;
1.2 itojun 1293: nxt = ip6e->ip6e_nxt;
1.62 itojun 1294: ip6e = NULL;
1295: m_freem(ext);
1296: ext = NULL;
1.2 itojun 1297: }
1298: loopend:
1.62 itojun 1299: ;
1.2 itojun 1300: }
1.62 itojun 1301: }
1.85 rpaulo 1302: #undef IS2292
1303:
1304:
1305: void
1.95 dyoung 1306: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1307: uint32_t *mtu)
1.85 rpaulo 1308: {
1309: struct socket *so;
1310: struct mbuf *m_mtu;
1311: struct ip6_mtuinfo mtuctl;
1312:
1313: so = in6p->in6p_socket;
1314:
1315: if (mtu == NULL)
1316: return;
1317:
1318: #ifdef DIAGNOSTIC
1319: if (so == NULL) /* I believe this is impossible */
1320: panic("ip6_notify_pmtu: socket is NULL");
1321: #endif
1322:
1323: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1324: mtuctl.ip6m_mtu = *mtu;
1325: mtuctl.ip6m_addr = *dst;
1326: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1327: return;
1328:
1.97 christos 1329: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1330: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1331: return;
1332:
1.95 dyoung 1333: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1334: == 0) {
1335: m_freem(m_mtu);
1336: /* XXX: should count statistics */
1337: } else
1338: sorwakeup(so);
1339:
1340: return;
1341: }
1.62 itojun 1342:
1343: /*
1344: * pull single extension header from mbuf chain. returns single mbuf that
1345: * contains the result, or NULL on error.
1346: */
1347: static struct mbuf *
1.107 christos 1348: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1349: {
1350: struct ip6_ext ip6e;
1351: size_t elen;
1352: struct mbuf *n;
1353:
1354: #ifdef DIAGNOSTIC
1355: switch (nxt) {
1356: case IPPROTO_DSTOPTS:
1357: case IPPROTO_ROUTING:
1358: case IPPROTO_HOPOPTS:
1359: case IPPROTO_AH: /* is it possible? */
1360: break;
1361: default:
1362: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1363: }
1.62 itojun 1364: #endif
1.2 itojun 1365:
1.97 christos 1366: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1367: if (nxt == IPPROTO_AH)
1368: elen = (ip6e.ip6e_len + 2) << 2;
1369: else
1370: elen = (ip6e.ip6e_len + 1) << 3;
1371:
1372: MGET(n, M_DONTWAIT, MT_DATA);
1373: if (n && elen >= MLEN) {
1374: MCLGET(n, M_DONTWAIT);
1375: if ((n->m_flags & M_EXT) == 0) {
1376: m_free(n);
1377: n = NULL;
1378: }
1379: }
1380: if (!n)
1381: return NULL;
1382:
1383: n->m_len = 0;
1384: if (elen >= M_TRAILINGSPACE(n)) {
1385: m_free(n);
1386: return NULL;
1387: }
1388:
1.97 christos 1389: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1390: n->m_len = elen;
1391: return n;
1.2 itojun 1392: }
1393:
1394: /*
1395: * Get pointer to the previous header followed by the header
1396: * currently processed.
1397: * XXX: This function supposes that
1398: * M includes all headers,
1399: * the next header field and the header length field of each header
1400: * are valid, and
1401: * the sum of each header length equals to OFF.
1402: * Because of these assumptions, this function must be called very
1403: * carefully. Moreover, it will not be used in the near future when
1404: * we develop `neater' mechanism to process extension headers.
1405: */
1.58 itojun 1406: u_int8_t *
1.107 christos 1407: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1408: {
1409: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1410:
1411: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1412: return (&ip6->ip6_nxt);
1.2 itojun 1413: else {
1414: int len, nxt;
1415: struct ip6_ext *ip6e = NULL;
1416:
1417: nxt = ip6->ip6_nxt;
1418: len = sizeof(struct ip6_hdr);
1419: while (len < off) {
1.97 christos 1420: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1421:
1.35 itojun 1422: switch (nxt) {
1.2 itojun 1423: case IPPROTO_FRAGMENT:
1424: len += sizeof(struct ip6_frag);
1425: break;
1426: case IPPROTO_AH:
1427: len += (ip6e->ip6e_len + 2) << 2;
1428: break;
1429: default:
1430: len += (ip6e->ip6e_len + 1) << 3;
1431: break;
1432: }
1433: nxt = ip6e->ip6e_nxt;
1434: }
1435: if (ip6e)
1.58 itojun 1436: return (&ip6e->ip6e_nxt);
1.2 itojun 1437: else
1438: return NULL;
1.18 itojun 1439: }
1440: }
1441:
1442: /*
1443: * get next header offset. m will be retained.
1444: */
1445: int
1.107 christos 1446: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1447: {
1448: struct ip6_hdr ip6;
1449: struct ip6_ext ip6e;
1450: struct ip6_frag fh;
1451:
1452: /* just in case */
1453: if (m == NULL)
1454: panic("ip6_nexthdr: m == NULL");
1455: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1456: return -1;
1457:
1458: switch (proto) {
1459: case IPPROTO_IPV6:
1.83 rpaulo 1460: /* do not chase beyond intermediate IPv6 headers */
1461: if (off != 0)
1462: return -1;
1.18 itojun 1463: if (m->m_pkthdr.len < off + sizeof(ip6))
1464: return -1;
1.97 christos 1465: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1466: if (nxtp)
1467: *nxtp = ip6.ip6_nxt;
1468: off += sizeof(ip6);
1469: return off;
1470:
1471: case IPPROTO_FRAGMENT:
1472: /*
1473: * terminate parsing if it is not the first fragment,
1474: * it does not make sense to parse through it.
1475: */
1476: if (m->m_pkthdr.len < off + sizeof(fh))
1477: return -1;
1.97 christos 1478: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1479: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1480: return -1;
1481: if (nxtp)
1482: *nxtp = fh.ip6f_nxt;
1483: off += sizeof(struct ip6_frag);
1484: return off;
1485:
1486: case IPPROTO_AH:
1487: if (m->m_pkthdr.len < off + sizeof(ip6e))
1488: return -1;
1.97 christos 1489: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1490: if (nxtp)
1491: *nxtp = ip6e.ip6e_nxt;
1492: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1493: if (m->m_pkthdr.len < off)
1494: return -1;
1.18 itojun 1495: return off;
1496:
1497: case IPPROTO_HOPOPTS:
1498: case IPPROTO_ROUTING:
1499: case IPPROTO_DSTOPTS:
1500: if (m->m_pkthdr.len < off + sizeof(ip6e))
1501: return -1;
1.97 christos 1502: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1503: if (nxtp)
1504: *nxtp = ip6e.ip6e_nxt;
1505: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1506: if (m->m_pkthdr.len < off)
1507: return -1;
1.18 itojun 1508: return off;
1509:
1510: case IPPROTO_NONE:
1511: case IPPROTO_ESP:
1512: case IPPROTO_IPCOMP:
1513: /* give up */
1514: return -1;
1515:
1516: default:
1517: return -1;
1518: }
1519: }
1520:
1521: /*
1522: * get offset for the last header in the chain. m will be kept untainted.
1523: */
1524: int
1.107 christos 1525: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1526: {
1527: int newoff;
1528: int nxt;
1529:
1530: if (!nxtp) {
1531: nxt = -1;
1532: nxtp = &nxt;
1533: }
1.86 rpaulo 1534: for (;;) {
1.18 itojun 1535: newoff = ip6_nexthdr(m, off, proto, nxtp);
1536: if (newoff < 0)
1537: return off;
1538: else if (newoff < off)
1539: return -1; /* invalid */
1540: else if (newoff == off)
1541: return newoff;
1542:
1543: off = newoff;
1544: proto = *nxtp;
1.2 itojun 1545: }
1546: }
1547:
1.81 rpaulo 1548: struct m_tag *
1.107 christos 1549: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1550: {
1551: struct m_tag *mtag;
1552:
1553: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1554: if (!mtag) {
1555: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1556: M_NOWAIT);
1557: if (mtag) {
1558: m_tag_prepend(m, mtag);
1.124 cegger 1559: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1560: }
1561: }
1562: return mtag;
1563: }
1564:
1565: struct m_tag *
1.107 christos 1566: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1567: {
1568: struct m_tag *mtag;
1569:
1570: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1571: return mtag;
1572: }
1573:
1574: void
1.107 christos 1575: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1576: {
1577: struct m_tag *mtag;
1578:
1579: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1580: if (mtag)
1581: m_tag_delete(m, mtag);
1582: }
1583:
1.2 itojun 1584: /*
1585: * System control for IP6
1586: */
1587:
1.120 matt 1588: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1589: 0, 0, 0, 0,
1590: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1591: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1592: EMSGSIZE, EHOSTUNREACH, 0, 0,
1593: 0, 0, 0, 0,
1594: ENOPROTOOPT
1595: };
1596:
1.153 christos 1597: extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS);
1598:
1.116 thorpej 1599: static int
1600: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1601: {
1602:
1.119 thorpej 1603: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1604: }
1605:
1.128 pooka 1606: static void
1607: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1608: {
1.85 rpaulo 1609: #ifdef RFC2292
1610: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1611: #else
1612: #define IS2292(x, y) (y)
1613: #endif
1.26 itojun 1614:
1.73 atatat 1615: sysctl_createv(clog, 0, NULL, NULL,
1616: CTLFLAG_PERMANENT,
1.74 atatat 1617: CTLTYPE_NODE, "inet6",
1618: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1619: NULL, 0, NULL, 0,
1620: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1621: sysctl_createv(clog, 0, NULL, NULL,
1622: CTLFLAG_PERMANENT,
1.74 atatat 1623: CTLTYPE_NODE, "ip6",
1624: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1625: NULL, 0, NULL, 0,
1626: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1627:
1.73 atatat 1628: sysctl_createv(clog, 0, NULL, NULL,
1629: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1630: CTLTYPE_INT, "forwarding",
1631: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1632: NULL, 0, &ip6_forwarding, 0,
1633: CTL_NET, PF_INET6, IPPROTO_IPV6,
1634: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1635: sysctl_createv(clog, 0, NULL, NULL,
1636: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1637: CTLTYPE_INT, "redirect",
1638: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1639: NULL, 0, &ip6_sendredirects, 0,
1640: CTL_NET, PF_INET6, IPPROTO_IPV6,
1641: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1642: sysctl_createv(clog, 0, NULL, NULL,
1643: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1644: CTLTYPE_INT, "hlim",
1645: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1646: NULL, 0, &ip6_defhlim, 0,
1647: CTL_NET, PF_INET6, IPPROTO_IPV6,
1648: IPV6CTL_DEFHLIM, CTL_EOL);
1649: #ifdef notyet
1.73 atatat 1650: sysctl_createv(clog, 0, NULL, NULL,
1651: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1652: CTLTYPE_INT, "mtu", NULL,
1653: NULL, 0, &, 0,
1654: CTL_NET, PF_INET6, IPPROTO_IPV6,
1655: IPV6CTL_DEFMTU, CTL_EOL);
1656: #endif
1657: #ifdef __no_idea__
1.73 atatat 1658: sysctl_createv(clog, 0, NULL, NULL,
1659: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1660: CTLTYPE_INT, "forwsrcrt", NULL,
1661: NULL, 0, &?, 0,
1662: CTL_NET, PF_INET6, IPPROTO_IPV6,
1663: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1664: sysctl_createv(clog, 0, NULL, NULL,
1665: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1666: CTLTYPE_STRUCT, "mrtstats", NULL,
1667: NULL, 0, &?, sizeof(?),
1668: CTL_NET, PF_INET6, IPPROTO_IPV6,
1669: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1670: sysctl_createv(clog, 0, NULL, NULL,
1671: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1672: CTLTYPE_?, "mrtproto", NULL,
1673: NULL, 0, &?, sizeof(?),
1674: CTL_NET, PF_INET6, IPPROTO_IPV6,
1675: IPV6CTL_MRTPROTO, CTL_EOL);
1676: #endif
1.73 atatat 1677: sysctl_createv(clog, 0, NULL, NULL,
1678: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1679: CTLTYPE_INT, "maxfragpackets",
1680: SYSCTL_DESCR("Maximum number of fragments to buffer "
1681: "for reassembly"),
1.70 atatat 1682: NULL, 0, &ip6_maxfragpackets, 0,
1683: CTL_NET, PF_INET6, IPPROTO_IPV6,
1684: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1685: #ifdef __no_idea__
1.73 atatat 1686: sysctl_createv(clog, 0, NULL, NULL,
1687: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1688: CTLTYPE_INT, "sourcecheck", NULL,
1689: NULL, 0, &?, 0,
1690: CTL_NET, PF_INET6, IPPROTO_IPV6,
1691: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1692: sysctl_createv(clog, 0, NULL, NULL,
1693: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1694: CTLTYPE_INT, "sourcecheck_logint", NULL,
1695: NULL, 0, &?, 0,
1696: CTL_NET, PF_INET6, IPPROTO_IPV6,
1697: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1698: #endif
1.73 atatat 1699: sysctl_createv(clog, 0, NULL, NULL,
1700: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1701: CTLTYPE_INT, "accept_rtadv",
1702: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1703: NULL, 0, &ip6_accept_rtadv, 0,
1704: CTL_NET, PF_INET6, IPPROTO_IPV6,
1705: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1706: sysctl_createv(clog, 0, NULL, NULL,
1707: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1708: CTLTYPE_INT, "rtadv_maxroutes",
1709: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1710: NULL, 0, &ip6_rtadv_maxroutes, 0,
1711: CTL_NET, PF_INET6, IPPROTO_IPV6,
1712: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1713: sysctl_createv(clog, 0, NULL, NULL,
1714: CTLFLAG_PERMANENT,
1715: CTLTYPE_INT, "rtadv_numroutes",
1716: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1717: NULL, 0, &nd6_numroutes, 0,
1718: CTL_NET, PF_INET6, IPPROTO_IPV6,
1719: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1720: sysctl_createv(clog, 0, NULL, NULL,
1721: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1722: CTLTYPE_INT, "keepfaith",
1723: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1724: NULL, 0, &ip6_keepfaith, 0,
1725: CTL_NET, PF_INET6, IPPROTO_IPV6,
1726: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1727: sysctl_createv(clog, 0, NULL, NULL,
1728: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1729: CTLTYPE_INT, "log_interval",
1730: SYSCTL_DESCR("Minumum interval between logging "
1731: "unroutable packets"),
1.70 atatat 1732: NULL, 0, &ip6_log_interval, 0,
1733: CTL_NET, PF_INET6, IPPROTO_IPV6,
1734: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1735: sysctl_createv(clog, 0, NULL, NULL,
1736: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1737: CTLTYPE_INT, "hdrnestlimit",
1738: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1739: NULL, 0, &ip6_hdrnestlimit, 0,
1740: CTL_NET, PF_INET6, IPPROTO_IPV6,
1741: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1742: sysctl_createv(clog, 0, NULL, NULL,
1743: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1744: CTLTYPE_INT, "dad_count",
1745: SYSCTL_DESCR("Number of Duplicate Address Detection "
1746: "probes to send"),
1.70 atatat 1747: NULL, 0, &ip6_dad_count, 0,
1748: CTL_NET, PF_INET6, IPPROTO_IPV6,
1749: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1750: sysctl_createv(clog, 0, NULL, NULL,
1751: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1752: CTLTYPE_INT, "auto_flowlabel",
1753: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1754: NULL, 0, &ip6_auto_flowlabel, 0,
1755: CTL_NET, PF_INET6, IPPROTO_IPV6,
1756: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1757: sysctl_createv(clog, 0, NULL, NULL,
1758: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1759: CTLTYPE_INT, "defmcasthlim",
1760: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1761: NULL, 0, &ip6_defmcasthlim, 0,
1762: CTL_NET, PF_INET6, IPPROTO_IPV6,
1763: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.73 atatat 1764: sysctl_createv(clog, 0, NULL, NULL,
1765: CTLFLAG_PERMANENT,
1.74 atatat 1766: CTLTYPE_STRING, "kame_version",
1767: SYSCTL_DESCR("KAME Version"),
1.78 christos 1768: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1769: CTL_NET, PF_INET6, IPPROTO_IPV6,
1770: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1771: sysctl_createv(clog, 0, NULL, NULL,
1772: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1773: CTLTYPE_INT, "use_deprecated",
1774: SYSCTL_DESCR("Allow use of deprecated addresses as "
1775: "source addresses"),
1.70 atatat 1776: NULL, 0, &ip6_use_deprecated, 0,
1777: CTL_NET, PF_INET6, IPPROTO_IPV6,
1778: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1779: sysctl_createv(clog, 0, NULL, NULL,
1780: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1781: CTLTYPE_INT, "rr_prune", NULL,
1782: NULL, 0, &ip6_rr_prune, 0,
1783: CTL_NET, PF_INET6, IPPROTO_IPV6,
1784: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1785: sysctl_createv(clog, 0, NULL, NULL,
1786: CTLFLAG_PERMANENT
1.70 atatat 1787: #ifndef INET6_BINDV6ONLY
1.73 atatat 1788: |CTLFLAG_READWRITE,
1.70 atatat 1789: #endif
1.74 atatat 1790: CTLTYPE_INT, "v6only",
1791: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1792: "to PF_INET sockets"),
1.70 atatat 1793: NULL, 0, &ip6_v6only, 0,
1794: CTL_NET, PF_INET6, IPPROTO_IPV6,
1795: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1796: sysctl_createv(clog, 0, NULL, NULL,
1797: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1798: CTLTYPE_INT, "anonportmin",
1799: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1800: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1801: CTL_NET, PF_INET6, IPPROTO_IPV6,
1802: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1803: sysctl_createv(clog, 0, NULL, NULL,
1804: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1805: CTLTYPE_INT, "anonportmax",
1806: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1807: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1808: CTL_NET, PF_INET6, IPPROTO_IPV6,
1809: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1810: #ifndef IPNOPRIVPORTS
1.73 atatat 1811: sysctl_createv(clog, 0, NULL, NULL,
1812: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1813: CTLTYPE_INT, "lowportmin",
1814: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1815: "to assign"),
1.70 atatat 1816: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1817: CTL_NET, PF_INET6, IPPROTO_IPV6,
1818: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1819: sysctl_createv(clog, 0, NULL, NULL,
1820: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1821: CTLTYPE_INT, "lowportmax",
1822: SYSCTL_DESCR("Highest privileged ephemeral port number "
1823: "to assign"),
1.70 atatat 1824: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1825: CTL_NET, PF_INET6, IPPROTO_IPV6,
1826: IPV6CTL_LOWPORTMAX, CTL_EOL);
1827: #endif /* IPNOPRIVPORTS */
1.73 atatat 1828: sysctl_createv(clog, 0, NULL, NULL,
1829: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.153 christos 1830: CTLTYPE_INT, "auto_linklocal",
1831: SYSCTL_DESCR("Default value of per-interface flag for "
1832: "adding an IPv6 link-local address to "
1833: "interfaces when attached"),
1834: NULL, 0, &ip6_auto_linklocal, 0,
1835: CTL_NET, PF_INET6, IPPROTO_IPV6,
1836: IPV6CTL_AUTO_LINKLOCAL, CTL_EOL);
1837: sysctl_createv(clog, 0, NULL, NULL,
1838: CTLFLAG_PERMANENT|CTLFLAG_READONLY,
1839: CTLTYPE_STRUCT, "addctlpolicy",
1840: SYSCTL_DESCR("Return the current address control"
1841: " policy"),
1842: sysctl_net_inet6_addrctlpolicy, 0, NULL, 0,
1843: CTL_NET, PF_INET6, IPPROTO_IPV6,
1844: IPV6CTL_ADDRCTLPOLICY, CTL_EOL);
1845: sysctl_createv(clog, 0, NULL, NULL,
1846: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1847: CTLTYPE_INT, "use_tempaddr",
1848: SYSCTL_DESCR("Use temporary address"),
1849: NULL, 0, &ip6_use_tempaddr, 0,
1850: CTL_NET, PF_INET6, IPPROTO_IPV6,
1851: CTL_CREATE, CTL_EOL);
1852: sysctl_createv(clog, 0, NULL, NULL,
1853: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.150 roy 1854: CTLTYPE_INT, "prefer_tempaddr",
1855: SYSCTL_DESCR("Prefer temporary address as source "
1856: "address"),
1857: NULL, 0, &ip6_prefer_tempaddr, 0,
1858: CTL_NET, PF_INET6, IPPROTO_IPV6,
1859: CTL_CREATE, CTL_EOL);
1860: sysctl_createv(clog, 0, NULL, NULL,
1861: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1862: CTLTYPE_INT, "temppltime",
1863: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1864: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1865: CTL_NET, PF_INET6, IPPROTO_IPV6,
1866: CTL_CREATE, CTL_EOL);
1867: sysctl_createv(clog, 0, NULL, NULL,
1868: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1869: CTLTYPE_INT, "tempvltime",
1870: SYSCTL_DESCR("valid lifetime of a temporary address"),
1871: NULL, 0, &ip6_temp_valid_lifetime, 0,
1872: CTL_NET, PF_INET6, IPPROTO_IPV6,
1873: CTL_CREATE, CTL_EOL);
1874: sysctl_createv(clog, 0, NULL, NULL,
1875: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1876: CTLTYPE_INT, "maxfrags",
1877: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1878: NULL, 0, &ip6_maxfrags, 0,
1879: CTL_NET, PF_INET6, IPPROTO_IPV6,
1880: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1881: sysctl_createv(clog, 0, NULL, NULL,
1882: CTLFLAG_PERMANENT,
1883: CTLTYPE_STRUCT, "stats",
1884: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1885: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1886: CTL_NET, PF_INET6, IPPROTO_IPV6,
1887: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1888: sysctl_createv(clog, 0, NULL, NULL,
1889: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1890: CTLTYPE_INT, "use_defaultzone",
1891: SYSCTL_DESCR("Whether to use the default scope zones"),
1892: NULL, 0, &ip6_use_defzone, 0,
1893: CTL_NET, PF_INET6, IPPROTO_IPV6,
1894: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1895: sysctl_createv(clog, 0, NULL, NULL,
1896: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1897: CTLTYPE_INT, "mcast_pmtu",
1898: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1899: NULL, 0, &ip6_mcast_pmtu, 0,
1900: CTL_NET, PF_INET6, IPPROTO_IPV6,
1901: CTL_CREATE, CTL_EOL);
1.138 christos 1902: /* anonportalgo RFC6056 subtree */
1.140 christos 1903: const struct sysctlnode *portalgo_node;
1904: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1905: CTLFLAG_PERMANENT,
1906: CTLTYPE_NODE, "anonportalgo",
1907: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1908: NULL, 0, NULL, 0,
1909: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1910: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1911: CTLFLAG_PERMANENT,
1912: CTLTYPE_STRING, "available",
1913: SYSCTL_DESCR("available algorithms"),
1.140 christos 1914: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1915: CTL_CREATE, CTL_EOL);
1.140 christos 1916: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1917: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1918: CTLTYPE_STRING, "selected",
1919: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1920: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1921: CTL_CREATE, CTL_EOL);
1.141 christos 1922: sysctl_createv(clog, 0, &portalgo_node, NULL,
1923: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1924: CTLTYPE_STRUCT, "reserve",
1925: SYSCTL_DESCR("bitmap of reserved ports"),
1926: sysctl_portalgo_reserve6, 0, NULL, 0,
1927: CTL_CREATE, CTL_EOL);
1.139 christos 1928: sysctl_createv(clog, 0, NULL, NULL,
1929: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1930: CTLTYPE_INT, "neighborgcthresh",
1931: SYSCTL_DESCR("Maximum number of entries in neighbor"
1932: " cache"),
1933: NULL, 1, &ip6_neighborgcthresh, 0,
1934: CTL_NET, PF_INET6, IPPROTO_IPV6,
1935: CTL_CREATE, CTL_EOL);
1936: sysctl_createv(clog, 0, NULL, NULL,
1937: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1938: CTLTYPE_INT, "maxifprefixes",
1939: SYSCTL_DESCR("Maximum number of prefixes created by"
1940: " route advertisement per interface"),
1941: NULL, 1, &ip6_maxifprefixes, 0,
1942: CTL_NET, PF_INET6, IPPROTO_IPV6,
1943: CTL_CREATE, CTL_EOL);
1944: sysctl_createv(clog, 0, NULL, NULL,
1945: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1946: CTLTYPE_INT, "maxifdefrouters",
1947: SYSCTL_DESCR("Maximum number of default routers created"
1948: " by route advertisement per interface"),
1949: NULL, 1, &ip6_maxifdefrouters, 0,
1950: CTL_NET, PF_INET6, IPPROTO_IPV6,
1951: CTL_CREATE, CTL_EOL);
1952: sysctl_createv(clog, 0, NULL, NULL,
1953: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1954: CTLTYPE_INT, "maxdynroutes",
1955: SYSCTL_DESCR("Maximum number of routes created via"
1956: " redirect"),
1957: NULL, 1, &ip6_maxdynroutes, 0,
1958: CTL_NET, PF_INET6, IPPROTO_IPV6,
1959: CTL_CREATE, CTL_EOL);
1.2 itojun 1960: }
1.116 thorpej 1961:
1962: void
1963: ip6_statinc(u_int stat)
1964: {
1965:
1966: KASSERT(stat < IP6_NSTATS);
1967: IP6_STATINC(stat);
1968: }
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