Annotation of src/sys/netinet6/ip6_input.c, Revision 1.173
1.173 ! christos 1: /* $NetBSD: ip6_input.c,v 1.172 2017/01/16 07:33:36 ryo 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>
1.173 ! christos 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.172 2017/01/16 07:33:36 ryo 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"
1.169 ozaki-r 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>
1.167 ozaki-r 91: #include <sys/percpu.h>
1.2 itojun 92:
93: #include <net/if.h>
94: #include <net/if_types.h>
95: #include <net/if_dl.h>
96: #include <net/route.h>
1.148 rmind 97: #include <net/pktqueue.h>
1.15 darrenr 98: #include <net/pfil.h>
1.2 itojun 99:
100: #include <netinet/in.h>
1.9 itojun 101: #include <netinet/in_systm.h>
102: #ifdef INET
103: #include <netinet/ip.h>
1.148 rmind 104: #include <netinet/ip_var.h>
1.9 itojun 105: #include <netinet/ip_icmp.h>
1.45 itojun 106: #endif /* INET */
1.14 itojun 107: #include <netinet/ip6.h>
1.140 christos 108: #include <netinet/portalgo.h>
1.2 itojun 109: #include <netinet6/in6_var.h>
1.11 itojun 110: #include <netinet6/ip6_var.h>
1.116 thorpej 111: #include <netinet6/ip6_private.h>
1.2 itojun 112: #include <netinet6/in6_pcb.h>
1.14 itojun 113: #include <netinet/icmp6.h>
1.81 rpaulo 114: #include <netinet6/scope6_var.h>
1.2 itojun 115: #include <netinet6/in6_ifattach.h>
116: #include <netinet6/nd6.h>
117:
1.142 christos 118: #ifdef IPSEC
1.94 degroote 119: #include <netipsec/ipsec.h>
120: #include <netipsec/ipsec6.h>
121: #include <netipsec/key.h>
1.142 christos 122: #endif /* IPSEC */
1.94 degroote 123:
1.123 christos 124: #ifdef COMPAT_50
125: #include <compat/sys/time.h>
126: #include <compat/sys/socket.h>
127: #endif
128:
1.2 itojun 129: #include <netinet6/ip6protosw.h>
130:
131: #include "faith.h"
132:
1.9 itojun 133: #include <net/net_osdep.h>
134:
1.2 itojun 135: extern struct domain inet6domain;
136:
137: u_char ip6_protox[IPPROTO_MAX];
1.148 rmind 138: pktqueue_t *ip6_pktq __read_mostly;
1.2 itojun 139:
140: int ip6_forward_srcrt; /* XXX */
141: int ip6_sourcecheck; /* XXX */
142: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 143:
1.143 rmind 144: pfil_head_t *inet6_pfil_hook;
1.29 thorpej 145:
1.116 thorpej 146: percpu_t *ip6stat_percpu;
1.2 itojun 147:
1.167 ozaki-r 148: percpu_t *ip6_forward_rt_percpu __cacheline_aligned;
149:
1.156 ozaki-r 150: static void ip6_init2(void);
1.148 rmind 151: static void ip6intr(void *);
1.112 dyoung 152: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 153:
1.136 drochner 154: static int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
155: u_int32_t *);
1.111 dyoung 156: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.128 pooka 157: static void sysctl_net_inet6_ip6_setup(struct sysctllog **);
1.2 itojun 158:
1.169 ozaki-r 159: #ifdef NET_MPSAFE
160: #define SOFTNET_LOCK() mutex_enter(softnet_lock)
161: #define SOFTNET_UNLOCK() mutex_exit(softnet_lock)
162: #else
163: #define SOFTNET_LOCK() KASSERT(mutex_owned(softnet_lock))
164: #define SOFTNET_UNLOCK() KASSERT(mutex_owned(softnet_lock))
165: #endif
166:
1.2 itojun 167: /*
168: * IP6 initialization: fill in IP6 protocol switch table.
169: * All protocols not implemented in kernel go to raw IP6 protocol handler.
170: */
171: void
1.114 matt 172: ip6_init(void)
1.2 itojun 173: {
1.78 christos 174: const struct ip6protosw *pr;
1.35 itojun 175: int i;
1.2 itojun 176:
1.163 ozaki-r 177: in6_init();
1.162 ozaki-r 178:
1.128 pooka 179: sysctl_net_inet6_ip6_setup(NULL);
1.78 christos 180: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 181: if (pr == 0)
182: panic("ip6_init");
183: for (i = 0; i < IPPROTO_MAX; i++)
184: ip6_protox[i] = pr - inet6sw;
1.78 christos 185: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
186: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 187: if (pr->pr_domain->dom_family == PF_INET6 &&
188: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
189: ip6_protox[pr->pr_protocol] = pr - inet6sw;
1.148 rmind 190:
1.149 ozaki-r 191: ip6_pktq = pktq_create(IFQ_MAXLEN, ip6intr, NULL);
1.148 rmind 192: KASSERT(ip6_pktq != NULL);
193:
1.81 rpaulo 194: scope6_init();
195: addrsel_policy_init();
1.2 itojun 196: nd6_init();
197: frag6_init();
1.133 tls 198: ip6_desync_factor = cprng_fast32() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 199:
1.156 ozaki-r 200: ip6_init2();
1.98 liamjfoy 201: #ifdef GATEWAY
1.99 liamjfoy 202: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 203: #endif
1.29 thorpej 204: /* Register our Packet Filter hook. */
1.143 rmind 205: inet6_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET6);
206: KASSERT(inet6_pfil_hook != NULL);
1.116 thorpej 207:
208: ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS);
1.167 ozaki-r 209:
210: ip6_forward_rt_percpu = percpu_alloc(sizeof(struct route));
211: if (ip6_forward_rt_percpu == NULL)
212: panic("failed to alllocate ip6_forward_rt_percpu");
1.2 itojun 213: }
214:
215: static void
1.156 ozaki-r 216: ip6_init2(void)
1.2 itojun 217: {
218:
1.83 rpaulo 219: /* timer for regeneranation of temporary addresses randomize ID */
1.118 ad 220: callout_init(&in6_tmpaddrtimer_ch, CALLOUT_MPSAFE);
1.83 rpaulo 221: callout_reset(&in6_tmpaddrtimer_ch,
222: (ip6_temp_preferred_lifetime - ip6_desync_factor -
223: ip6_temp_regen_advance) * hz,
224: in6_tmpaddrtimer, NULL);
1.2 itojun 225: }
226:
227: /*
228: * IP6 input interrupt handling. Just pass the packet to ip6_input.
229: */
1.148 rmind 230: static void
231: ip6intr(void *arg __unused)
1.2 itojun 232: {
233: struct mbuf *m;
234:
1.169 ozaki-r 235: #ifndef NET_MPSAFE
1.118 ad 236: mutex_enter(softnet_lock);
1.169 ozaki-r 237: #endif
1.148 rmind 238: while ((m = pktq_dequeue(ip6_pktq)) != NULL) {
1.160 ozaki-r 239: struct psref psref;
240: struct ifnet *rcvif = m_get_rcvif_psref(m, &psref);
1.148 rmind 241:
1.160 ozaki-r 242: if (rcvif == NULL) {
243: m_freem(m);
244: continue;
245: }
1.148 rmind 246: /*
247: * Drop the packet if IPv6 is disabled on the interface.
248: */
1.160 ozaki-r 249: if ((ND_IFINFO(rcvif)->flags & ND6_IFF_IFDISABLED)) {
250: m_put_rcvif_psref(rcvif, &psref);
1.83 rpaulo 251: m_freem(m);
1.148 rmind 252: continue;
1.83 rpaulo 253: }
1.160 ozaki-r 254: ip6_input(m, rcvif);
255: m_put_rcvif_psref(rcvif, &psref);
1.2 itojun 256: }
1.169 ozaki-r 257: #ifndef NET_MPSAFE
1.118 ad 258: mutex_exit(softnet_lock);
1.169 ozaki-r 259: #endif
1.2 itojun 260: }
261:
262: void
1.160 ozaki-r 263: ip6_input(struct mbuf *m, struct ifnet *rcvif)
1.2 itojun 264: {
1.9 itojun 265: struct ip6_hdr *ip6;
1.105 dyoung 266: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 267: u_int32_t plen;
1.5 itojun 268: u_int32_t rtalert = ~0;
1.104 yamt 269: int nxt, ours = 0, rh_present = 0;
1.9 itojun 270: struct ifnet *deliverifp = NULL;
1.64 itojun 271: int srcrt = 0;
1.171 ozaki-r 272: struct rtentry *rt = NULL;
1.105 dyoung 273: union {
274: struct sockaddr dst;
275: struct sockaddr_in6 dst6;
276: } u;
1.167 ozaki-r 277: struct route *ro;
1.2 itojun 278:
279: /*
1.81 rpaulo 280: * make sure we don't have onion peering information into m_tag.
281: */
282: ip6_delaux(m);
283:
284: /*
1.44 itojun 285: * mbuf statistics
1.2 itojun 286: */
287: if (m->m_flags & M_EXT) {
288: if (m->m_next)
1.116 thorpej 289: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 290: else
1.116 thorpej 291: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 292: } else {
1.115 thorpej 293: #define M2MMAX 32
1.2 itojun 294: if (m->m_next) {
1.159 ozaki-r 295: if (m->m_flags & M_LOOP)
1.116 thorpej 296: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.159 ozaki-r 297: else if (rcvif->if_index < M2MMAX)
298: IP6_STATINC(IP6_STAT_M2M + rcvif->if_index);
299: else
1.116 thorpej 300: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 301: } else
1.116 thorpej 302: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 303: #undef M2MMAX
1.2 itojun 304: }
305:
1.159 ozaki-r 306: in6_ifstat_inc(rcvif, ifs6_in_receive);
1.116 thorpej 307: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 308:
1.57 thorpej 309: /*
310: * If the IPv6 header is not aligned, slurp it up into a new
311: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 312: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 313: * IPv6 header is in the first mbuf of the chain.
314: */
1.97 christos 315: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 316: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
317: (max_linkhdr + 3) & ~3)) == NULL) {
318: /* XXXJRT new stat, please */
1.116 thorpej 319: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 320: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.57 thorpej 321: return;
322: }
323: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
1.55 itojun 324: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 325: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 326: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.9 itojun 327: return;
328: }
1.2 itojun 329: }
330:
331: ip6 = mtod(m, struct ip6_hdr *);
332:
333: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 334: IP6_STATINC(IP6_STAT_BADVERS);
1.159 ozaki-r 335: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 336: goto bad;
337: }
1.15 darrenr 338:
1.98 liamjfoy 339: /*
340: * Assume that we can create a fast-forward IP flow entry
341: * based on this packet.
342: */
343: m->m_flags |= M_CANFASTFWD;
344:
1.15 darrenr 345: /*
346: * Run through list of hooks for input packets. If there are any
347: * filters which require that additional packets in the flow are
348: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
349: * Note that filters must _never_ set this flag, as another filter
350: * in the list may have previously cleared it.
351: */
1.39 itojun 352: /*
353: * let ipfilter look at packet on the wire,
354: * not the decapsulated packet.
355: */
1.142 christos 356: #if defined(IPSEC)
1.146 christos 357: if (!ipsec_used || !ipsec_indone(m))
1.39 itojun 358: #else
359: if (1)
360: #endif
361: {
1.64 itojun 362: struct in6_addr odst;
363:
364: odst = ip6->ip6_dst;
1.159 ozaki-r 365: if (pfil_run_hooks(inet6_pfil_hook, &m, rcvif, PFIL_IN) != 0)
1.39 itojun 366: return;
367: if (m == NULL)
368: return;
369: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 370: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 371: }
1.15 darrenr 372:
1.116 thorpej 373: IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt);
1.2 itojun 374:
1.30 thorpej 375: #ifdef ALTQ
1.169 ozaki-r 376: if (altq_input != NULL) {
377: SOFTNET_LOCK();
378: if ((*altq_input)(m, AF_INET6) == 0) {
379: SOFTNET_UNLOCK();
380: /* packet is dropped by traffic conditioner */
381: return;
382: }
383: SOFTNET_UNLOCK();
1.9 itojun 384: }
385: #endif
386:
1.2 itojun 387: /*
1.44 itojun 388: * Check against address spoofing/corruption.
1.2 itojun 389: */
390: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
391: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 392: /*
393: * XXX: "badscope" is not very suitable for a multicast source.
394: */
1.116 thorpej 395: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 396: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.2 itojun 397: goto bad;
398: }
1.13 itojun 399: /*
1.44 itojun 400: * The following check is not documented in specs. A malicious
401: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
402: * and bypass security checks (act as if it was from 127.0.0.1 by using
403: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 404: *
1.44 itojun 405: * This check chokes if we are in an SIIT cloud. As none of BSDs
406: * support IPv4-less kernel compilation, we cannot support SIIT
407: * environment at all. So, it makes more sense for us to reject any
408: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 409: * partial support for SIIT environment.
1.13 itojun 410: */
411: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
412: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 413: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 414: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 415: goto bad;
416: }
1.17 itojun 417: #if 0
1.13 itojun 418: /*
1.17 itojun 419: * Reject packets with IPv4 compatible addresses (auto tunnel).
420: *
421: * The code forbids auto tunnel relay case in RFC1933 (the check is
422: * stronger than RFC1933). We may want to re-enable it if mech-xx
423: * is revised to forbid relaying case.
1.13 itojun 424: */
425: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
426: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
1.116 thorpej 427: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 428: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 429: goto bad;
430: }
431: #endif
1.35 itojun 432:
1.2 itojun 433: /*
1.82 yamt 434: * Disambiguate address scope zones (if there is ambiguity).
435: * We first make sure that the original source or destination address
436: * is not in our internal form for scoped addresses. Such addresses
437: * are not necessarily invalid spec-wise, but we cannot accept them due
438: * to the usage conflict.
439: * in6_setscope() then also checks and rejects the cases where src or
440: * dst are the loopback address and the receiving interface
441: * is not loopback.
442: */
1.88 bouyer 443: if (__predict_false(
444: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
445: goto bad;
446: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 447: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 448: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 449: goto bad;
450: }
1.159 ozaki-r 451: if (in6_setscope(&ip6->ip6_src, rcvif, NULL) ||
452: in6_setscope(&ip6->ip6_dst, rcvif, NULL)) {
1.116 thorpej 453: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 454: goto bad;
455: }
456:
1.171 ozaki-r 457: ro = percpu_getref(ip6_forward_rt_percpu);
1.82 yamt 458: /*
1.2 itojun 459: * Multicast check
460: */
461: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
462: struct in6_multi *in6m = 0;
1.9 itojun 463:
1.159 ozaki-r 464: in6_ifstat_inc(rcvif, ifs6_in_mcast);
1.2 itojun 465: /*
466: * See if we belong to the destination multicast group on the
467: * arrival interface.
468: */
1.159 ozaki-r 469: IN6_LOOKUP_MULTI(ip6->ip6_dst, rcvif, in6m);
1.2 itojun 470: if (in6m)
471: ours = 1;
472: else if (!ip6_mrouter) {
1.116 thorpej 473: uint64_t *ip6s = IP6_STAT_GETREF();
474: ip6s[IP6_STAT_NOTMEMBER]++;
475: ip6s[IP6_STAT_CANTFORWARD]++;
476: IP6_STAT_PUTREF();
1.159 ozaki-r 477: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.171 ozaki-r 478: goto bad_unref;
1.2 itojun 479: }
1.159 ozaki-r 480: deliverifp = rcvif;
1.2 itojun 481: goto hbhcheck;
482: }
483:
1.105 dyoung 484: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
485:
1.2 itojun 486: /*
487: * Unicast check
488: */
1.167 ozaki-r 489: rt = rtcache_lookup2(ro, &u.dst, 1, &hit);
1.105 dyoung 490: if (hit)
1.116 thorpej 491: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 492: else
1.116 thorpej 493: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 494:
1.109 dyoung 495: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 496:
497: /*
498: * Accept the packet if the forwarding interface to the destination
499: * according to the routing table is the loopback interface,
500: * unless the associated route has a gateway.
501: * Note that this approach causes to accept a packet if there is a
502: * route to the loopback interface for the destination of the packet.
503: * But we think it's even useful in some situations, e.g. when using
504: * a special daemon which wants to intercept the packet.
505: */
1.105 dyoung 506: if (rt != NULL &&
507: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.2 itojun 508: #if 0
509: /*
510: * The check below is redundant since the comparison of
511: * the destination and the key of the rtentry has
512: * already done through looking up the routing table.
513: */
1.109 dyoung 514: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 515: #endif
1.105 dyoung 516: rt->rt_ifp->if_type == IFT_LOOP) {
517: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 518: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
519: m->m_flags |= M_ANYCAST6;
1.24 itojun 520: /*
521: * packets to a tentative, duplicated, or somehow invalid
522: * address must not be accepted.
523: */
1.168 roy 524: if (!(ia6->ia6_flags & (IN6_IFF_NOTREADY | IN6_IFF_DETACHED))) {
1.24 itojun 525: /* this address is ready */
1.2 itojun 526: ours = 1;
1.9 itojun 527: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 528: goto hbhcheck;
529: } else {
1.24 itojun 530: /* address is not ready, so discard the packet. */
1.172 ryo 531: char ip6bufs[INET6_ADDRSTRLEN];
532: char ip6bufd[INET6_ADDRSTRLEN];
1.157 ozaki-r 533: nd6log(LOG_INFO, "packet to an unready address %s->%s\n",
1.173 ! christos 534: IN6_PRINT(ip6bufs, &ip6->ip6_src),
! 535: IN6_PRINT(ip6bufd, &ip6->ip6_dst));
1.24 itojun 536:
1.171 ozaki-r 537: goto bad_unref;
1.2 itojun 538: }
539: }
540:
541: /*
1.55 itojun 542: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 543: */
544: #if defined(NFAITH) && 0 < NFAITH
545: if (ip6_keepfaith) {
1.105 dyoung 546: if (rt != NULL && rt->rt_ifp != NULL &&
547: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 548: /* XXX do we need more sanity checks? */
549: ours = 1;
1.105 dyoung 550: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 551: goto hbhcheck;
552: }
553: }
554: #endif
555:
556: #if 0
557: {
558: /*
559: * Last resort: check in6_ifaddr for incoming interface.
560: * The code is here until I update the "goto ours hack" code above
561: * working right.
562: */
563: struct ifaddr *ifa;
1.164 ozaki-r 564: IFADDR_READER_FOREACH(ifa, rcvif) {
1.9 itojun 565: if (ifa->ifa_addr->sa_family != AF_INET6)
566: continue;
567: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
568: ours = 1;
569: deliverifp = ifa->ifa_ifp;
1.2 itojun 570: goto hbhcheck;
571: }
572: }
1.9 itojun 573: }
1.2 itojun 574: #endif
575:
576: /*
577: * Now there is no reason to process the packet if it's not our own
578: * and we're not a router.
579: */
580: if (!ip6_forwarding) {
1.116 thorpej 581: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.159 ozaki-r 582: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.171 ozaki-r 583: goto bad_unref;
1.2 itojun 584: }
585:
586: hbhcheck:
587: /*
1.81 rpaulo 588: * record address information into m_tag, if we don't have one yet.
589: * note that we are unable to record it, if the address is not listed
590: * as our interface address (e.g. multicast addresses, addresses
591: * within FAITH prefixes and such).
592: */
1.111 dyoung 593: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 594: struct in6_ifaddr *ia6;
1.165 ozaki-r 595: int s = pserialize_read_enter();
1.81 rpaulo 596:
597: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.165 ozaki-r 598: /* Depends on ip6_setdstifaddr never sleep */
1.111 dyoung 599: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
600: /*
601: * XXX maybe we should drop the packet here,
602: * as we could not provide enough information
603: * to the upper layers.
604: */
1.81 rpaulo 605: }
1.165 ozaki-r 606: pserialize_read_exit(s);
1.81 rpaulo 607: }
608:
609: /*
1.2 itojun 610: * Process Hop-by-Hop options header if it's contained.
611: * m may be modified in ip6_hopopts_input().
612: * If a JumboPayload option is included, plen will also be modified.
613: */
614: plen = (u_int32_t)ntohs(ip6->ip6_plen);
615: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 616: struct ip6_hbh *hbh;
617:
618: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
619: #if 0 /*touches NULL pointer*/
1.159 ozaki-r 620: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.9 itojun 621: #endif
1.171 ozaki-r 622: rtcache_unref(rt, ro);
623: percpu_putref(ip6_forward_rt_percpu);
1.2 itojun 624: return; /* m have already been freed */
1.9 itojun 625: }
1.22 itojun 626:
1.2 itojun 627: /* adjust pointer */
628: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 629:
630: /*
1.49 itojun 631: * if the payload length field is 0 and the next header field
1.22 itojun 632: * indicates Hop-by-Hop Options header, then a Jumbo Payload
633: * option MUST be included.
634: */
635: if (ip6->ip6_plen == 0 && plen == 0) {
636: /*
637: * Note that if a valid jumbo payload option is
1.83 rpaulo 638: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 639: * (non-zero) payload length to the variable plen.
1.22 itojun 640: */
1.116 thorpej 641: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.159 ozaki-r 642: in6_ifstat_inc(rcvif, ifs6_in_discard);
643: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.22 itojun 644: icmp6_error(m, ICMP6_PARAM_PROB,
645: ICMP6_PARAMPROB_HEADER,
1.97 christos 646: (char *)&ip6->ip6_plen - (char *)ip6);
1.171 ozaki-r 647: rtcache_unref(rt, ro);
648: percpu_putref(ip6_forward_rt_percpu);
1.22 itojun 649: return;
650: }
1.9 itojun 651: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
652: sizeof(struct ip6_hbh));
653: if (hbh == NULL) {
1.116 thorpej 654: IP6_STATINC(IP6_STAT_TOOSHORT);
1.171 ozaki-r 655: rtcache_unref(rt, ro);
656: percpu_putref(ip6_forward_rt_percpu);
1.9 itojun 657: return;
658: }
1.57 thorpej 659: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 660: nxt = hbh->ip6h_nxt;
1.2 itojun 661:
662: /*
663: * accept the packet if a router alert option is included
664: * and we act as an IPv6 router.
665: */
1.5 itojun 666: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 667: ours = 1;
668: } else
669: nxt = ip6->ip6_nxt;
670:
671: /*
672: * Check that the amount of data in the buffers
673: * is as at least much as the IPv6 header would have us expect.
674: * Trim mbufs if longer than we expect.
675: * Drop packet if shorter than we expect.
676: */
677: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 678: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 679: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.171 ozaki-r 680: goto bad_unref;
1.2 itojun 681: }
682: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
683: if (m->m_len == m->m_pkthdr.len) {
684: m->m_len = sizeof(struct ip6_hdr) + plen;
685: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
686: } else
687: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
688: }
689:
690: /*
691: * Forward if desirable.
692: */
693: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
694: /*
695: * If we are acting as a multicast router, all
696: * incoming multicast packets are passed to the
697: * kernel-level multicast forwarding function.
698: * The packet is returned (relatively) intact; if
699: * ip6_mforward() returns a non-zero value, the packet
700: * must be discarded, else it may be accepted below.
701: */
1.169 ozaki-r 702: if (ip6_mrouter != NULL) {
703: int error;
704:
705: SOFTNET_LOCK();
706: error = ip6_mforward(ip6, rcvif, m);
707: SOFTNET_UNLOCK();
708:
709: if (error != 0) {
1.171 ozaki-r 710: rtcache_unref(rt, ro);
711: percpu_putref(ip6_forward_rt_percpu);
1.169 ozaki-r 712: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.170 ozaki-r 713: goto bad;
1.169 ozaki-r 714: }
1.2 itojun 715: }
1.170 ozaki-r 716: if (!ours)
1.171 ozaki-r 717: goto bad_unref;
1.22 itojun 718: } else if (!ours) {
1.171 ozaki-r 719: rtcache_unref(rt, ro);
720: percpu_putref(ip6_forward_rt_percpu);
1.64 itojun 721: ip6_forward(m, srcrt);
1.2 itojun 722: return;
1.56 itojun 723: }
1.25 itojun 724:
725: ip6 = mtod(m, struct ip6_hdr *);
726:
727: /*
728: * Malicious party may be able to use IPv4 mapped addr to confuse
729: * tcp/udp stack and bypass security checks (act as if it was from
730: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
731: *
732: * For SIIT end node behavior, you may want to disable the check.
733: * However, you will become vulnerable to attacks using IPv4 mapped
734: * source.
735: */
736: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
737: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 738: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 739: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.171 ozaki-r 740: goto bad_unref;
1.25 itojun 741: }
1.2 itojun 742:
743: /*
744: * Tell launch routine the next header
745: */
1.12 itojun 746: #ifdef IFA_STATS
1.28 itojun 747: if (deliverifp != NULL) {
1.9 itojun 748: struct in6_ifaddr *ia6;
1.165 ozaki-r 749: int s = pserialize_read_enter();
1.9 itojun 750: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
751: if (ia6)
752: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
1.165 ozaki-r 753: pserialize_read_exit(s);
1.9 itojun 754: }
755: #endif
1.116 thorpej 756: IP6_STATINC(IP6_STAT_DELIVERED);
1.9 itojun 757: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 758: nest = 0;
1.40 itojun 759:
1.171 ozaki-r 760: if (rt != NULL) {
761: rtcache_unref(rt, ro);
762: rt = NULL;
763: }
764: percpu_putref(ip6_forward_rt_percpu);
765:
1.104 yamt 766: rh_present = 0;
1.2 itojun 767: while (nxt != IPPROTO_DONE) {
768: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.116 thorpej 769: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.159 ozaki-r 770: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 771: goto bad;
772: }
1.8 itojun 773:
774: /*
775: * protection against faulty packet - there should be
776: * more sanity checks in header chain processing.
777: */
778: if (m->m_pkthdr.len < off) {
1.116 thorpej 779: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 780: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.8 itojun 781: goto bad;
782: }
783:
1.104 yamt 784: if (nxt == IPPROTO_ROUTING) {
785: if (rh_present++) {
1.159 ozaki-r 786: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.116 thorpej 787: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 788: goto bad;
789: }
790: }
791:
1.142 christos 792: #ifdef IPSEC
1.146 christos 793: if (ipsec_used) {
1.94 degroote 794: /*
1.146 christos 795: * enforce IPsec policy checking if we are seeing last
796: * header. note that we do not visit this with
797: * protocols with pcb layer code - like udp/tcp/raw ip.
1.94 degroote 798: */
1.146 christos 799: if ((inet6sw[ip_protox[nxt]].pr_flags
800: & PR_LASTHDR) != 0) {
1.169 ozaki-r 801: int error;
802:
803: SOFTNET_LOCK();
804: error = ipsec6_input(m);
805: SOFTNET_UNLOCK();
1.146 christos 806: if (error)
807: goto bad;
808: }
1.94 degroote 809: }
1.142 christos 810: #endif /* IPSEC */
1.94 degroote 811:
1.169 ozaki-r 812: SOFTNET_LOCK();
1.2 itojun 813: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
1.169 ozaki-r 814: SOFTNET_UNLOCK();
1.2 itojun 815: }
816: return;
1.171 ozaki-r 817:
818: bad_unref:
819: rtcache_unref(rt, ro);
820: percpu_putref(ip6_forward_rt_percpu);
1.2 itojun 821: bad:
822: m_freem(m);
1.171 ozaki-r 823: return;
1.2 itojun 824: }
825:
826: /*
1.81 rpaulo 827: * set/grab in6_ifaddr correspond to IPv6 destination address.
828: */
829: static struct m_tag *
1.112 dyoung 830: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 831: {
832: struct m_tag *mtag;
1.144 christos 833: struct ip6aux *ip6a;
1.81 rpaulo 834:
835: mtag = ip6_addaux(m);
1.144 christos 836: if (mtag == NULL)
837: return NULL;
1.112 dyoung 838:
1.144 christos 839: ip6a = (struct ip6aux *)(mtag + 1);
840: if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) {
841: IP6_STATINC(IP6_STAT_BADSCOPE);
842: return NULL;
1.112 dyoung 843: }
1.144 christos 844:
845: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
846: ip6a->ip6a_flags = ia->ia6_flags;
847: return mtag;
1.81 rpaulo 848: }
849:
1.112 dyoung 850: const struct ip6aux *
1.107 christos 851: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 852: {
853: struct m_tag *mtag;
854:
855: mtag = ip6_findaux(m);
1.112 dyoung 856: if (mtag != NULL)
857: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 858: else
859: return NULL;
860: }
861:
862: /*
1.2 itojun 863: * Hop-by-Hop options header processing. If a valid jumbo payload option is
864: * included, the real payload length will be stored in plenp.
1.107 christos 865: *
866: * rtalertp - XXX: should be stored more smart way
1.2 itojun 867: */
1.136 drochner 868: int
1.107 christos 869: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
870: struct mbuf **mp, int *offp)
1.2 itojun 871: {
1.35 itojun 872: struct mbuf *m = *mp;
1.2 itojun 873: int off = *offp, hbhlen;
874: struct ip6_hbh *hbh;
875:
876: /* validation of the length of the header */
1.9 itojun 877: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
878: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
879: if (hbh == NULL) {
1.116 thorpej 880: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 881: return -1;
882: }
883: hbhlen = (hbh->ip6h_len + 1) << 3;
884: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
885: hbhlen);
886: if (hbh == NULL) {
1.116 thorpej 887: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 888: return -1;
889: }
1.57 thorpej 890: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 891: off += hbhlen;
892: hbhlen -= sizeof(struct ip6_hbh);
893:
894: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
895: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 896: return (-1);
1.2 itojun 897:
898: *offp = off;
899: *mp = m;
1.58 itojun 900: return (0);
1.2 itojun 901: }
902:
903: /*
904: * Search header for all Hop-by-hop options and process each option.
905: * This function is separate from ip6_hopopts_input() in order to
906: * handle a case where the sending node itself process its hop-by-hop
907: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 908: *
909: * The function assumes that hbh header is located right after the IPv6 header
910: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
911: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 912: */
1.136 drochner 913: static int
1.107 christos 914: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
915: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 916: {
917: struct ip6_hdr *ip6;
918: int optlen = 0;
919: u_int8_t *opt = opthead;
920: u_int16_t rtalert_val;
1.22 itojun 921: u_int32_t jumboplen;
1.55 itojun 922: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 923:
924: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 925: switch (*opt) {
926: case IP6OPT_PAD1:
927: optlen = 1;
928: break;
929: case IP6OPT_PADN:
930: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 931: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 932: goto bad;
933: }
934: optlen = *(opt + 1) + 2;
935: break;
936: case IP6OPT_RTALERT:
937: /* XXX may need check for alignment */
938: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 939: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 940: goto bad;
941: }
942: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 943: /* XXX stat */
944: icmp6_error(m, ICMP6_PARAM_PROB,
945: ICMP6_PARAMPROB_HEADER,
946: erroff + opt + 1 - opthead);
947: return (-1);
1.35 itojun 948: }
949: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 950: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 951: *rtalertp = ntohs(rtalert_val);
952: break;
953: case IP6OPT_JUMBO:
1.22 itojun 954: /* XXX may need check for alignment */
955: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 956: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 957: goto bad;
958: }
1.35 itojun 959: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 960: /* XXX stat */
961: icmp6_error(m, ICMP6_PARAM_PROB,
962: ICMP6_PARAMPROB_HEADER,
963: erroff + opt + 1 - opthead);
964: return (-1);
1.35 itojun 965: }
1.22 itojun 966: optlen = IP6OPT_JUMBO_LEN;
967:
968: /*
969: * IPv6 packets that have non 0 payload length
1.35 itojun 970: * must not contain a jumbo payload option.
1.22 itojun 971: */
972: ip6 = mtod(m, struct ip6_hdr *);
973: if (ip6->ip6_plen) {
1.116 thorpej 974: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 975: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 976: ICMP6_PARAMPROB_HEADER,
977: erroff + opt - opthead);
978: return (-1);
1.22 itojun 979: }
1.2 itojun 980:
1.22 itojun 981: /*
982: * We may see jumbolen in unaligned location, so
983: * we'd need to perform bcopy().
984: */
1.126 tsutsui 985: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 986: jumboplen = (u_int32_t)htonl(jumboplen);
987:
988: #if 1
989: /*
990: * if there are multiple jumbo payload options,
991: * *plenp will be non-zero and the packet will be
992: * rejected.
993: * the behavior may need some debate in ipngwg -
994: * multiple options does not make sense, however,
995: * there's no explicit mention in specification.
996: */
997: if (*plenp != 0) {
1.116 thorpej 998: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 999: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1000: ICMP6_PARAMPROB_HEADER,
1001: erroff + opt + 2 - opthead);
1002: return (-1);
1.22 itojun 1003: }
1.8 itojun 1004: #endif
1.2 itojun 1005:
1.22 itojun 1006: /*
1007: * jumbo payload length must be larger than 65535.
1008: */
1009: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 1010: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 1011: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 1012: ICMP6_PARAMPROB_HEADER,
1013: erroff + opt + 2 - opthead);
1014: return (-1);
1.22 itojun 1015: }
1016: *plenp = jumboplen;
1017:
1018: break;
1.35 itojun 1019: default: /* unknown option */
1020: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 1021: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 1022: goto bad;
1023: }
1.55 itojun 1024: optlen = ip6_unknown_opt(opt, m,
1025: erroff + opt - opthead);
1026: if (optlen == -1)
1027: return (-1);
1.35 itojun 1028: optlen += 2;
1029: break;
1.2 itojun 1030: }
1031: }
1032:
1.55 itojun 1033: return (0);
1.2 itojun 1034:
1035: bad:
1036: m_freem(m);
1.55 itojun 1037: return (-1);
1.2 itojun 1038: }
1039:
1040: /*
1041: * Unknown option processing.
1042: * The third argument `off' is the offset from the IPv6 header to the option,
1043: * which is necessary if the IPv6 header the and option header and IPv6 header
1044: * is not continuous in order to return an ICMPv6 error.
1045: */
1046: int
1.107 christos 1047: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1048: {
1049: struct ip6_hdr *ip6;
1050:
1.35 itojun 1051: switch (IP6OPT_TYPE(*optp)) {
1052: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1053: return ((int)*(optp + 1));
1.35 itojun 1054: case IP6OPT_TYPE_DISCARD: /* silently discard */
1055: m_freem(m);
1.58 itojun 1056: return (-1);
1.35 itojun 1057: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 1058: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1059: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1060: return (-1);
1.35 itojun 1061: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 1062: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1063: ip6 = mtod(m, struct ip6_hdr *);
1064: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1065: (m->m_flags & (M_BCAST|M_MCAST)))
1066: m_freem(m);
1067: else
1068: icmp6_error(m, ICMP6_PARAM_PROB,
1069: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1070: return (-1);
1.2 itojun 1071: }
1072:
1073: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1074: return (-1);
1.2 itojun 1075: }
1076:
1077: /*
1.9 itojun 1078: * Create the "control" list for this pcb.
1079: *
1080: * The routine will be called from upper layer handlers like tcp6_input().
1081: * Thus the routine assumes that the caller (tcp6_input) have already
1082: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1083: * very first mbuf on the mbuf chain.
1084: * We may want to add some infinite loop prevention or sanity checks for safety.
1085: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1086: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1087: */
1088: void
1.107 christos 1089: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1090: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1091: {
1.85 rpaulo 1092: #ifdef RFC2292
1093: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1094: #else
1095: #define IS2292(x, y) (y)
1096: #endif
1097:
1.123 christos 1098: if (in6p->in6p_socket->so_options & SO_TIMESTAMP
1099: #ifdef SO_OTIMESTAMP
1100: || in6p->in6p_socket->so_options & SO_OTIMESTAMP
1101: #endif
1102: ) {
1.2 itojun 1103: struct timeval tv;
1104:
1105: microtime(&tv);
1.123 christos 1106: #ifdef SO_OTIMESTAMP
1107: if (in6p->in6p_socket->so_options & SO_OTIMESTAMP) {
1108: struct timeval50 tv50;
1109: timeval_to_timeval50(&tv, &tv50);
1110: *mp = sbcreatecontrol((void *) &tv50, sizeof(tv50),
1111: SCM_OTIMESTAMP, SOL_SOCKET);
1112: } else
1113: #endif
1.97 christos 1114: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1115: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1116: if (*mp)
1117: mp = &(*mp)->m_next;
1118: }
1.87 rpaulo 1119:
1120: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1121: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1122: return;
1123:
1.2 itojun 1124: /* RFC 2292 sec. 5 */
1.35 itojun 1125: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1126: struct in6_pktinfo pi6;
1.85 rpaulo 1127:
1.126 tsutsui 1128: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1129: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.160 ozaki-r 1130: pi6.ipi6_ifindex = m->m_pkthdr.rcvif_index;
1.97 christos 1131: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1132: sizeof(struct in6_pktinfo),
1133: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1134: if (*mp)
1135: mp = &(*mp)->m_next;
1136: }
1.85 rpaulo 1137:
1.2 itojun 1138: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1139: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1140:
1.97 christos 1141: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1142: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1143: if (*mp)
1144: mp = &(*mp)->m_next;
1145: }
1146:
1147: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1148: u_int32_t flowinfo;
1149: int tclass;
1150:
1151: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1152: flowinfo >>= 20;
1153:
1154: tclass = flowinfo & 0xff;
1.97 christos 1155: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1156: IPV6_TCLASS, IPPROTO_IPV6);
1157:
1.2 itojun 1158: if (*mp)
1159: mp = &(*mp)->m_next;
1160: }
1161:
1162: /*
1.75 itojun 1163: * IPV6_HOPOPTS socket option. Recall that we required super-user
1164: * privilege for the option (see ip6_ctloutput), but it might be too
1165: * strict, since there might be some hop-by-hop options which can be
1166: * returned to normal user.
1.85 rpaulo 1167: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1168: */
1.75 itojun 1169: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1170: /*
1171: * Check if a hop-by-hop options header is contatined in the
1172: * received packet, and if so, store the options as ancillary
1173: * data. Note that a hop-by-hop options header must be
1174: * just after the IPv6 header, which fact is assured through
1175: * the IPv6 input processing.
1176: */
1.78 christos 1177: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1178: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1179: struct ip6_hbh *hbh;
1180: int hbhlen;
1.62 itojun 1181: struct mbuf *ext;
1.9 itojun 1182:
1.62 itojun 1183: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1184: xip6->ip6_nxt);
1.62 itojun 1185: if (ext == NULL) {
1.116 thorpej 1186: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1187: return;
1188: }
1.62 itojun 1189: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1190: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1191: if (hbhlen != ext->m_len) {
1192: m_freem(ext);
1.116 thorpej 1193: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1194: return;
1195: }
1.2 itojun 1196:
1197: /*
1198: * XXX: We copy whole the header even if a jumbo
1199: * payload option is included, which option is to
1200: * be removed before returning in the RFC 2292.
1.85 rpaulo 1201: * Note: this constraint is removed in RFC3542.
1.2 itojun 1202: */
1.97 christos 1203: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1204: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1205: IPPROTO_IPV6);
1.2 itojun 1206: if (*mp)
1207: mp = &(*mp)->m_next;
1.62 itojun 1208: m_freem(ext);
1.2 itojun 1209: }
1210: }
1211:
1212: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1213: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1214: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1215: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1216:
1217: /*
1218: * Search for destination options headers or routing
1219: * header(s) through the header chain, and stores each
1220: * header as ancillary data.
1221: * Note that the order of the headers remains in
1222: * the chain of ancillary data.
1223: */
1.86 rpaulo 1224: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1225: struct ip6_ext *ip6e = NULL;
1.9 itojun 1226: int elen;
1.62 itojun 1227: struct mbuf *ext = NULL;
1.9 itojun 1228:
1.62 itojun 1229: /*
1230: * if it is not an extension header, don't try to
1231: * pull it from the chain.
1232: */
1233: switch (nxt) {
1234: case IPPROTO_DSTOPTS:
1235: case IPPROTO_ROUTING:
1236: case IPPROTO_HOPOPTS:
1237: case IPPROTO_AH: /* is it possible? */
1238: break;
1239: default:
1240: goto loopend;
1241: }
1242:
1243: ext = ip6_pullexthdr(m, off, nxt);
1244: if (ext == NULL) {
1.116 thorpej 1245: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1246: return;
1247: }
1.62 itojun 1248: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1249: if (nxt == IPPROTO_AH)
1250: elen = (ip6e->ip6e_len + 2) << 2;
1251: else
1252: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1253: if (elen != ext->m_len) {
1254: m_freem(ext);
1.116 thorpej 1255: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1256: return;
1257: }
1.57 thorpej 1258: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1259:
1.35 itojun 1260: switch (nxt) {
1.62 itojun 1261: case IPPROTO_DSTOPTS:
1.127 martin 1262: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1263: break;
1264:
1.97 christos 1265: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1266: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1267: IPPROTO_IPV6);
1.35 itojun 1268: if (*mp)
1269: mp = &(*mp)->m_next;
1270: break;
1271:
1272: case IPPROTO_ROUTING:
1.127 martin 1273: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1274: break;
1275:
1.97 christos 1276: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1277: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1278: IPPROTO_IPV6);
1.35 itojun 1279: if (*mp)
1280: mp = &(*mp)->m_next;
1281: break;
1282:
1.62 itojun 1283: case IPPROTO_HOPOPTS:
1284: case IPPROTO_AH: /* is it possible? */
1285: break;
1286:
1.35 itojun 1287: default:
1288: /*
1.62 itojun 1289: * other cases have been filtered in the above.
1290: * none will visit this case. here we supply
1291: * the code just in case (nxt overwritten or
1292: * other cases).
1.35 itojun 1293: */
1.62 itojun 1294: m_freem(ext);
1.35 itojun 1295: goto loopend;
1296:
1.2 itojun 1297: }
1298:
1299: /* proceed with the next header. */
1.9 itojun 1300: off += elen;
1.2 itojun 1301: nxt = ip6e->ip6e_nxt;
1.62 itojun 1302: ip6e = NULL;
1303: m_freem(ext);
1304: ext = NULL;
1.2 itojun 1305: }
1306: loopend:
1.62 itojun 1307: ;
1.2 itojun 1308: }
1.62 itojun 1309: }
1.85 rpaulo 1310: #undef IS2292
1311:
1312:
1313: void
1.95 dyoung 1314: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1315: uint32_t *mtu)
1.85 rpaulo 1316: {
1317: struct socket *so;
1318: struct mbuf *m_mtu;
1319: struct ip6_mtuinfo mtuctl;
1320:
1321: so = in6p->in6p_socket;
1322:
1323: if (mtu == NULL)
1324: return;
1325:
1326: #ifdef DIAGNOSTIC
1327: if (so == NULL) /* I believe this is impossible */
1328: panic("ip6_notify_pmtu: socket is NULL");
1329: #endif
1330:
1331: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1332: mtuctl.ip6m_mtu = *mtu;
1333: mtuctl.ip6m_addr = *dst;
1334: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1335: return;
1336:
1.97 christos 1337: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1338: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1339: return;
1340:
1.95 dyoung 1341: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1342: == 0) {
1343: m_freem(m_mtu);
1344: /* XXX: should count statistics */
1345: } else
1346: sorwakeup(so);
1347:
1348: return;
1349: }
1.62 itojun 1350:
1351: /*
1352: * pull single extension header from mbuf chain. returns single mbuf that
1353: * contains the result, or NULL on error.
1354: */
1355: static struct mbuf *
1.107 christos 1356: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1357: {
1358: struct ip6_ext ip6e;
1359: size_t elen;
1360: struct mbuf *n;
1361:
1362: #ifdef DIAGNOSTIC
1363: switch (nxt) {
1364: case IPPROTO_DSTOPTS:
1365: case IPPROTO_ROUTING:
1366: case IPPROTO_HOPOPTS:
1367: case IPPROTO_AH: /* is it possible? */
1368: break;
1369: default:
1370: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1371: }
1.62 itojun 1372: #endif
1.2 itojun 1373:
1.97 christos 1374: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1375: if (nxt == IPPROTO_AH)
1376: elen = (ip6e.ip6e_len + 2) << 2;
1377: else
1378: elen = (ip6e.ip6e_len + 1) << 3;
1379:
1380: MGET(n, M_DONTWAIT, MT_DATA);
1381: if (n && elen >= MLEN) {
1382: MCLGET(n, M_DONTWAIT);
1383: if ((n->m_flags & M_EXT) == 0) {
1384: m_free(n);
1385: n = NULL;
1386: }
1387: }
1388: if (!n)
1389: return NULL;
1390:
1391: n->m_len = 0;
1392: if (elen >= M_TRAILINGSPACE(n)) {
1393: m_free(n);
1394: return NULL;
1395: }
1396:
1.97 christos 1397: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1398: n->m_len = elen;
1399: return n;
1.2 itojun 1400: }
1401:
1402: /*
1403: * Get pointer to the previous header followed by the header
1404: * currently processed.
1405: * XXX: This function supposes that
1406: * M includes all headers,
1407: * the next header field and the header length field of each header
1408: * are valid, and
1409: * the sum of each header length equals to OFF.
1410: * Because of these assumptions, this function must be called very
1411: * carefully. Moreover, it will not be used in the near future when
1412: * we develop `neater' mechanism to process extension headers.
1413: */
1.58 itojun 1414: u_int8_t *
1.107 christos 1415: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1416: {
1417: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1418:
1419: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1420: return (&ip6->ip6_nxt);
1.2 itojun 1421: else {
1422: int len, nxt;
1423: struct ip6_ext *ip6e = NULL;
1424:
1425: nxt = ip6->ip6_nxt;
1426: len = sizeof(struct ip6_hdr);
1427: while (len < off) {
1.97 christos 1428: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1429:
1.35 itojun 1430: switch (nxt) {
1.2 itojun 1431: case IPPROTO_FRAGMENT:
1432: len += sizeof(struct ip6_frag);
1433: break;
1434: case IPPROTO_AH:
1435: len += (ip6e->ip6e_len + 2) << 2;
1436: break;
1437: default:
1438: len += (ip6e->ip6e_len + 1) << 3;
1439: break;
1440: }
1441: nxt = ip6e->ip6e_nxt;
1442: }
1443: if (ip6e)
1.58 itojun 1444: return (&ip6e->ip6e_nxt);
1.2 itojun 1445: else
1446: return NULL;
1.18 itojun 1447: }
1448: }
1449:
1450: /*
1451: * get next header offset. m will be retained.
1452: */
1453: int
1.107 christos 1454: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1455: {
1456: struct ip6_hdr ip6;
1457: struct ip6_ext ip6e;
1458: struct ip6_frag fh;
1459:
1460: /* just in case */
1461: if (m == NULL)
1462: panic("ip6_nexthdr: m == NULL");
1463: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1464: return -1;
1465:
1466: switch (proto) {
1467: case IPPROTO_IPV6:
1.83 rpaulo 1468: /* do not chase beyond intermediate IPv6 headers */
1469: if (off != 0)
1470: return -1;
1.18 itojun 1471: if (m->m_pkthdr.len < off + sizeof(ip6))
1472: return -1;
1.97 christos 1473: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1474: if (nxtp)
1475: *nxtp = ip6.ip6_nxt;
1476: off += sizeof(ip6);
1477: return off;
1478:
1479: case IPPROTO_FRAGMENT:
1480: /*
1481: * terminate parsing if it is not the first fragment,
1482: * it does not make sense to parse through it.
1483: */
1484: if (m->m_pkthdr.len < off + sizeof(fh))
1485: return -1;
1.97 christos 1486: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1487: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1488: return -1;
1489: if (nxtp)
1490: *nxtp = fh.ip6f_nxt;
1491: off += sizeof(struct ip6_frag);
1492: return off;
1493:
1494: case IPPROTO_AH:
1495: if (m->m_pkthdr.len < off + sizeof(ip6e))
1496: return -1;
1.97 christos 1497: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1498: if (nxtp)
1499: *nxtp = ip6e.ip6e_nxt;
1500: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1501: if (m->m_pkthdr.len < off)
1502: return -1;
1.18 itojun 1503: return off;
1504:
1505: case IPPROTO_HOPOPTS:
1506: case IPPROTO_ROUTING:
1507: case IPPROTO_DSTOPTS:
1508: if (m->m_pkthdr.len < off + sizeof(ip6e))
1509: return -1;
1.97 christos 1510: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1511: if (nxtp)
1512: *nxtp = ip6e.ip6e_nxt;
1513: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1514: if (m->m_pkthdr.len < off)
1515: return -1;
1.18 itojun 1516: return off;
1517:
1518: case IPPROTO_NONE:
1519: case IPPROTO_ESP:
1520: case IPPROTO_IPCOMP:
1521: /* give up */
1522: return -1;
1523:
1524: default:
1525: return -1;
1526: }
1527: }
1528:
1529: /*
1530: * get offset for the last header in the chain. m will be kept untainted.
1531: */
1532: int
1.107 christos 1533: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1534: {
1535: int newoff;
1536: int nxt;
1537:
1538: if (!nxtp) {
1539: nxt = -1;
1540: nxtp = &nxt;
1541: }
1.86 rpaulo 1542: for (;;) {
1.18 itojun 1543: newoff = ip6_nexthdr(m, off, proto, nxtp);
1544: if (newoff < 0)
1545: return off;
1546: else if (newoff < off)
1547: return -1; /* invalid */
1548: else if (newoff == off)
1549: return newoff;
1550:
1551: off = newoff;
1552: proto = *nxtp;
1.2 itojun 1553: }
1554: }
1555:
1.81 rpaulo 1556: struct m_tag *
1.107 christos 1557: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1558: {
1559: struct m_tag *mtag;
1560:
1561: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1562: if (!mtag) {
1563: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1564: M_NOWAIT);
1565: if (mtag) {
1566: m_tag_prepend(m, mtag);
1.124 cegger 1567: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1568: }
1569: }
1570: return mtag;
1571: }
1572:
1573: struct m_tag *
1.107 christos 1574: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1575: {
1576: struct m_tag *mtag;
1577:
1578: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1579: return mtag;
1580: }
1581:
1582: void
1.107 christos 1583: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1584: {
1585: struct m_tag *mtag;
1586:
1587: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1588: if (mtag)
1589: m_tag_delete(m, mtag);
1590: }
1591:
1.2 itojun 1592: /*
1593: * System control for IP6
1594: */
1595:
1.120 matt 1596: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1597: 0, 0, 0, 0,
1598: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1599: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1600: EMSGSIZE, EHOSTUNREACH, 0, 0,
1601: 0, 0, 0, 0,
1602: ENOPROTOOPT
1603: };
1604:
1.153 christos 1605: extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS);
1606:
1.116 thorpej 1607: static int
1608: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1609: {
1610:
1.119 thorpej 1611: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1612: }
1613:
1.128 pooka 1614: static void
1615: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1616: {
1.85 rpaulo 1617: #ifdef RFC2292
1618: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1619: #else
1620: #define IS2292(x, y) (y)
1621: #endif
1.26 itojun 1622:
1.73 atatat 1623: sysctl_createv(clog, 0, NULL, NULL,
1624: CTLFLAG_PERMANENT,
1.74 atatat 1625: CTLTYPE_NODE, "inet6",
1626: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1627: NULL, 0, NULL, 0,
1628: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1629: sysctl_createv(clog, 0, NULL, NULL,
1630: CTLFLAG_PERMANENT,
1.74 atatat 1631: CTLTYPE_NODE, "ip6",
1632: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1633: NULL, 0, NULL, 0,
1634: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1635:
1.73 atatat 1636: sysctl_createv(clog, 0, NULL, NULL,
1637: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1638: CTLTYPE_INT, "forwarding",
1639: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1640: NULL, 0, &ip6_forwarding, 0,
1641: CTL_NET, PF_INET6, IPPROTO_IPV6,
1642: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1643: sysctl_createv(clog, 0, NULL, NULL,
1644: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1645: CTLTYPE_INT, "redirect",
1646: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1647: NULL, 0, &ip6_sendredirects, 0,
1648: CTL_NET, PF_INET6, IPPROTO_IPV6,
1649: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1650: sysctl_createv(clog, 0, NULL, NULL,
1651: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1652: CTLTYPE_INT, "hlim",
1653: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1654: NULL, 0, &ip6_defhlim, 0,
1655: CTL_NET, PF_INET6, IPPROTO_IPV6,
1656: IPV6CTL_DEFHLIM, CTL_EOL);
1657: #ifdef notyet
1.73 atatat 1658: sysctl_createv(clog, 0, NULL, NULL,
1659: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1660: CTLTYPE_INT, "mtu", NULL,
1661: NULL, 0, &, 0,
1662: CTL_NET, PF_INET6, IPPROTO_IPV6,
1663: IPV6CTL_DEFMTU, CTL_EOL);
1664: #endif
1665: #ifdef __no_idea__
1.73 atatat 1666: sysctl_createv(clog, 0, NULL, NULL,
1667: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1668: CTLTYPE_INT, "forwsrcrt", NULL,
1669: NULL, 0, &?, 0,
1670: CTL_NET, PF_INET6, IPPROTO_IPV6,
1671: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1672: sysctl_createv(clog, 0, NULL, NULL,
1673: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1674: CTLTYPE_STRUCT, "mrtstats", NULL,
1675: NULL, 0, &?, sizeof(?),
1676: CTL_NET, PF_INET6, IPPROTO_IPV6,
1677: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1678: sysctl_createv(clog, 0, NULL, NULL,
1679: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1680: CTLTYPE_?, "mrtproto", NULL,
1681: NULL, 0, &?, sizeof(?),
1682: CTL_NET, PF_INET6, IPPROTO_IPV6,
1683: IPV6CTL_MRTPROTO, CTL_EOL);
1684: #endif
1.73 atatat 1685: sysctl_createv(clog, 0, NULL, NULL,
1686: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1687: CTLTYPE_INT, "maxfragpackets",
1688: SYSCTL_DESCR("Maximum number of fragments to buffer "
1689: "for reassembly"),
1.70 atatat 1690: NULL, 0, &ip6_maxfragpackets, 0,
1691: CTL_NET, PF_INET6, IPPROTO_IPV6,
1692: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1693: #ifdef __no_idea__
1.73 atatat 1694: sysctl_createv(clog, 0, NULL, NULL,
1695: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1696: CTLTYPE_INT, "sourcecheck", NULL,
1697: NULL, 0, &?, 0,
1698: CTL_NET, PF_INET6, IPPROTO_IPV6,
1699: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1700: sysctl_createv(clog, 0, NULL, NULL,
1701: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1702: CTLTYPE_INT, "sourcecheck_logint", NULL,
1703: NULL, 0, &?, 0,
1704: CTL_NET, PF_INET6, IPPROTO_IPV6,
1705: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1706: #endif
1.73 atatat 1707: sysctl_createv(clog, 0, NULL, NULL,
1708: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1709: CTLTYPE_INT, "accept_rtadv",
1710: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1711: NULL, 0, &ip6_accept_rtadv, 0,
1712: CTL_NET, PF_INET6, IPPROTO_IPV6,
1713: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1714: sysctl_createv(clog, 0, NULL, NULL,
1715: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1716: CTLTYPE_INT, "rtadv_maxroutes",
1717: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1718: NULL, 0, &ip6_rtadv_maxroutes, 0,
1719: CTL_NET, PF_INET6, IPPROTO_IPV6,
1720: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1721: sysctl_createv(clog, 0, NULL, NULL,
1722: CTLFLAG_PERMANENT,
1723: CTLTYPE_INT, "rtadv_numroutes",
1724: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1725: NULL, 0, &nd6_numroutes, 0,
1726: CTL_NET, PF_INET6, IPPROTO_IPV6,
1727: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1728: sysctl_createv(clog, 0, NULL, NULL,
1729: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1730: CTLTYPE_INT, "keepfaith",
1731: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1732: NULL, 0, &ip6_keepfaith, 0,
1733: CTL_NET, PF_INET6, IPPROTO_IPV6,
1734: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1735: sysctl_createv(clog, 0, NULL, NULL,
1736: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1737: CTLTYPE_INT, "log_interval",
1738: SYSCTL_DESCR("Minumum interval between logging "
1739: "unroutable packets"),
1.70 atatat 1740: NULL, 0, &ip6_log_interval, 0,
1741: CTL_NET, PF_INET6, IPPROTO_IPV6,
1742: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1743: sysctl_createv(clog, 0, NULL, NULL,
1744: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1745: CTLTYPE_INT, "hdrnestlimit",
1746: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1747: NULL, 0, &ip6_hdrnestlimit, 0,
1748: CTL_NET, PF_INET6, IPPROTO_IPV6,
1749: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1750: sysctl_createv(clog, 0, NULL, NULL,
1751: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1752: CTLTYPE_INT, "dad_count",
1753: SYSCTL_DESCR("Number of Duplicate Address Detection "
1754: "probes to send"),
1.70 atatat 1755: NULL, 0, &ip6_dad_count, 0,
1756: CTL_NET, PF_INET6, IPPROTO_IPV6,
1757: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1758: sysctl_createv(clog, 0, NULL, NULL,
1759: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1760: CTLTYPE_INT, "auto_flowlabel",
1761: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1762: NULL, 0, &ip6_auto_flowlabel, 0,
1763: CTL_NET, PF_INET6, IPPROTO_IPV6,
1764: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1765: sysctl_createv(clog, 0, NULL, NULL,
1766: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1767: CTLTYPE_INT, "defmcasthlim",
1768: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1769: NULL, 0, &ip6_defmcasthlim, 0,
1770: CTL_NET, PF_INET6, IPPROTO_IPV6,
1771: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.73 atatat 1772: sysctl_createv(clog, 0, NULL, NULL,
1773: CTLFLAG_PERMANENT,
1.74 atatat 1774: CTLTYPE_STRING, "kame_version",
1775: SYSCTL_DESCR("KAME Version"),
1.78 christos 1776: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1777: CTL_NET, PF_INET6, IPPROTO_IPV6,
1778: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1779: sysctl_createv(clog, 0, NULL, NULL,
1780: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1781: CTLTYPE_INT, "use_deprecated",
1782: SYSCTL_DESCR("Allow use of deprecated addresses as "
1783: "source addresses"),
1.70 atatat 1784: NULL, 0, &ip6_use_deprecated, 0,
1785: CTL_NET, PF_INET6, IPPROTO_IPV6,
1786: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1787: sysctl_createv(clog, 0, NULL, NULL,
1788: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1789: CTLTYPE_INT, "rr_prune", NULL,
1790: NULL, 0, &ip6_rr_prune, 0,
1791: CTL_NET, PF_INET6, IPPROTO_IPV6,
1792: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1793: sysctl_createv(clog, 0, NULL, NULL,
1794: CTLFLAG_PERMANENT
1.70 atatat 1795: #ifndef INET6_BINDV6ONLY
1.73 atatat 1796: |CTLFLAG_READWRITE,
1.70 atatat 1797: #endif
1.74 atatat 1798: CTLTYPE_INT, "v6only",
1799: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1800: "to PF_INET sockets"),
1.70 atatat 1801: NULL, 0, &ip6_v6only, 0,
1802: CTL_NET, PF_INET6, IPPROTO_IPV6,
1803: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1804: sysctl_createv(clog, 0, NULL, NULL,
1805: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1806: CTLTYPE_INT, "anonportmin",
1807: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1808: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1809: CTL_NET, PF_INET6, IPPROTO_IPV6,
1810: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1811: sysctl_createv(clog, 0, NULL, NULL,
1812: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1813: CTLTYPE_INT, "anonportmax",
1814: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1815: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1816: CTL_NET, PF_INET6, IPPROTO_IPV6,
1817: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1818: #ifndef IPNOPRIVPORTS
1.73 atatat 1819: sysctl_createv(clog, 0, NULL, NULL,
1820: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1821: CTLTYPE_INT, "lowportmin",
1822: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1823: "to assign"),
1.70 atatat 1824: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1825: CTL_NET, PF_INET6, IPPROTO_IPV6,
1826: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1827: sysctl_createv(clog, 0, NULL, NULL,
1828: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1829: CTLTYPE_INT, "lowportmax",
1830: SYSCTL_DESCR("Highest privileged ephemeral port number "
1831: "to assign"),
1.70 atatat 1832: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1833: CTL_NET, PF_INET6, IPPROTO_IPV6,
1834: IPV6CTL_LOWPORTMAX, CTL_EOL);
1835: #endif /* IPNOPRIVPORTS */
1.73 atatat 1836: sysctl_createv(clog, 0, NULL, NULL,
1837: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.153 christos 1838: CTLTYPE_INT, "auto_linklocal",
1839: SYSCTL_DESCR("Default value of per-interface flag for "
1840: "adding an IPv6 link-local address to "
1841: "interfaces when attached"),
1842: NULL, 0, &ip6_auto_linklocal, 0,
1843: CTL_NET, PF_INET6, IPPROTO_IPV6,
1844: IPV6CTL_AUTO_LINKLOCAL, CTL_EOL);
1845: sysctl_createv(clog, 0, NULL, NULL,
1846: CTLFLAG_PERMANENT|CTLFLAG_READONLY,
1847: CTLTYPE_STRUCT, "addctlpolicy",
1848: SYSCTL_DESCR("Return the current address control"
1849: " policy"),
1850: sysctl_net_inet6_addrctlpolicy, 0, NULL, 0,
1851: CTL_NET, PF_INET6, IPPROTO_IPV6,
1852: IPV6CTL_ADDRCTLPOLICY, CTL_EOL);
1853: sysctl_createv(clog, 0, NULL, NULL,
1854: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1855: CTLTYPE_INT, "use_tempaddr",
1856: SYSCTL_DESCR("Use temporary address"),
1857: NULL, 0, &ip6_use_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,
1.150 roy 1862: CTLTYPE_INT, "prefer_tempaddr",
1863: SYSCTL_DESCR("Prefer temporary address as source "
1864: "address"),
1865: NULL, 0, &ip6_prefer_tempaddr, 0,
1866: CTL_NET, PF_INET6, IPPROTO_IPV6,
1867: CTL_CREATE, CTL_EOL);
1868: sysctl_createv(clog, 0, NULL, NULL,
1869: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1870: CTLTYPE_INT, "temppltime",
1871: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1872: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1873: CTL_NET, PF_INET6, IPPROTO_IPV6,
1874: CTL_CREATE, CTL_EOL);
1875: sysctl_createv(clog, 0, NULL, NULL,
1876: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1877: CTLTYPE_INT, "tempvltime",
1878: SYSCTL_DESCR("valid lifetime of a temporary address"),
1879: NULL, 0, &ip6_temp_valid_lifetime, 0,
1880: CTL_NET, PF_INET6, IPPROTO_IPV6,
1881: CTL_CREATE, CTL_EOL);
1882: sysctl_createv(clog, 0, NULL, NULL,
1883: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1884: CTLTYPE_INT, "maxfrags",
1885: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1886: NULL, 0, &ip6_maxfrags, 0,
1887: CTL_NET, PF_INET6, IPPROTO_IPV6,
1888: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1889: sysctl_createv(clog, 0, NULL, NULL,
1890: CTLFLAG_PERMANENT,
1891: CTLTYPE_STRUCT, "stats",
1892: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1893: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1894: CTL_NET, PF_INET6, IPPROTO_IPV6,
1895: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1896: sysctl_createv(clog, 0, NULL, NULL,
1897: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1898: CTLTYPE_INT, "use_defaultzone",
1899: SYSCTL_DESCR("Whether to use the default scope zones"),
1900: NULL, 0, &ip6_use_defzone, 0,
1901: CTL_NET, PF_INET6, IPPROTO_IPV6,
1902: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1903: sysctl_createv(clog, 0, NULL, NULL,
1904: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1905: CTLTYPE_INT, "mcast_pmtu",
1906: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1907: NULL, 0, &ip6_mcast_pmtu, 0,
1908: CTL_NET, PF_INET6, IPPROTO_IPV6,
1909: CTL_CREATE, CTL_EOL);
1.138 christos 1910: /* anonportalgo RFC6056 subtree */
1.140 christos 1911: const struct sysctlnode *portalgo_node;
1912: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1913: CTLFLAG_PERMANENT,
1914: CTLTYPE_NODE, "anonportalgo",
1915: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1916: NULL, 0, NULL, 0,
1917: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1918: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1919: CTLFLAG_PERMANENT,
1920: CTLTYPE_STRING, "available",
1921: SYSCTL_DESCR("available algorithms"),
1.140 christos 1922: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1923: CTL_CREATE, CTL_EOL);
1.140 christos 1924: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1925: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1926: CTLTYPE_STRING, "selected",
1927: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1928: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1929: CTL_CREATE, CTL_EOL);
1.141 christos 1930: sysctl_createv(clog, 0, &portalgo_node, NULL,
1931: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1932: CTLTYPE_STRUCT, "reserve",
1933: SYSCTL_DESCR("bitmap of reserved ports"),
1934: sysctl_portalgo_reserve6, 0, NULL, 0,
1935: CTL_CREATE, CTL_EOL);
1.139 christos 1936: sysctl_createv(clog, 0, NULL, NULL,
1937: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1938: CTLTYPE_INT, "neighborgcthresh",
1939: SYSCTL_DESCR("Maximum number of entries in neighbor"
1940: " cache"),
1941: NULL, 1, &ip6_neighborgcthresh, 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, "maxifprefixes",
1947: SYSCTL_DESCR("Maximum number of prefixes created by"
1948: " route advertisement per interface"),
1949: NULL, 1, &ip6_maxifprefixes, 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, "maxifdefrouters",
1955: SYSCTL_DESCR("Maximum number of default routers created"
1956: " by route advertisement per interface"),
1957: NULL, 1, &ip6_maxifdefrouters, 0,
1958: CTL_NET, PF_INET6, IPPROTO_IPV6,
1959: CTL_CREATE, CTL_EOL);
1960: sysctl_createv(clog, 0, NULL, NULL,
1961: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1962: CTLTYPE_INT, "maxdynroutes",
1963: SYSCTL_DESCR("Maximum number of routes created via"
1964: " redirect"),
1965: NULL, 1, &ip6_maxdynroutes, 0,
1966: CTL_NET, PF_INET6, IPPROTO_IPV6,
1967: CTL_CREATE, CTL_EOL);
1.2 itojun 1968: }
1.116 thorpej 1969:
1970: void
1971: ip6_statinc(u_int stat)
1972: {
1973:
1974: KASSERT(stat < IP6_NSTATS);
1975: IP6_STATINC(stat);
1976: }
CVSweb <webmaster@jp.NetBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to ip6_input.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [cvs.NetBSD.org] / src / sys / netinet6