Annotation of src/sys/netinet6/ip6_input.c, Revision 1.90.2.1.2.2
1.90.2.1.2.2! wrstuden 1: /* $NetBSD: ip6_input.c,v 1.90.2.1.2.1 2007/06/04 01:54:25 wrstuden 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>
1.90.2.1.2.2! wrstuden 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.90.2.1.2.1 2007/06/04 01:54:25 wrstuden Exp $");
1.2 itojun 66:
67: #include "opt_inet.h"
1.85 rpaulo 68: #include "opt_inet6.h"
1.4 thorpej 69: #include "opt_ipsec.h"
1.15 darrenr 70: #include "opt_pfil_hooks.h"
1.2 itojun 71:
72: #include <sys/param.h>
73: #include <sys/systm.h>
74: #include <sys/malloc.h>
75: #include <sys/mbuf.h>
76: #include <sys/domain.h>
77: #include <sys/protosw.h>
78: #include <sys/socket.h>
79: #include <sys/socketvar.h>
80: #include <sys/errno.h>
81: #include <sys/time.h>
82: #include <sys/kernel.h>
83: #include <sys/syslog.h>
84: #include <sys/proc.h>
1.46 simonb 85: #include <sys/sysctl.h>
1.2 itojun 86:
87: #include <net/if.h>
88: #include <net/if_types.h>
89: #include <net/if_dl.h>
90: #include <net/route.h>
91: #include <net/netisr.h>
1.15 darrenr 92: #ifdef PFIL_HOOKS
93: #include <net/pfil.h>
94: #endif
1.2 itojun 95:
96: #include <netinet/in.h>
1.9 itojun 97: #include <netinet/in_systm.h>
98: #ifdef INET
99: #include <netinet/ip.h>
100: #include <netinet/ip_icmp.h>
1.45 itojun 101: #endif /* INET */
1.14 itojun 102: #include <netinet/ip6.h>
1.2 itojun 103: #include <netinet6/in6_var.h>
1.11 itojun 104: #include <netinet6/ip6_var.h>
1.2 itojun 105: #include <netinet6/in6_pcb.h>
1.14 itojun 106: #include <netinet/icmp6.h>
1.81 rpaulo 107: #include <netinet6/scope6_var.h>
1.2 itojun 108: #include <netinet6/in6_ifattach.h>
109: #include <netinet6/nd6.h>
110:
1.37 itojun 111: #ifdef IPSEC
112: #include <netinet6/ipsec.h>
113: #endif
114:
1.90.2.1.2.1 wrstuden 115: #ifdef FAST_IPSEC
116: #include <netipsec/ipsec.h>
117: #include <netipsec/ipsec6.h>
118: #include <netipsec/key.h>
119: #endif /* FAST_IPSEC */
120:
1.2 itojun 121: #include <netinet6/ip6protosw.h>
122:
123: #include "faith.h"
124: #include "gif.h"
1.50 itojun 125:
126: #if NGIF > 0
127: #include <netinet6/in6_gif.h>
128: #endif
1.2 itojun 129:
1.9 itojun 130: #include <net/net_osdep.h>
131:
1.2 itojun 132: extern struct domain inet6domain;
133:
134: u_char ip6_protox[IPPROTO_MAX];
135: static int ip6qmaxlen = IFQ_MAXLEN;
136: struct in6_ifaddr *in6_ifaddr;
137: struct ifqueue ip6intrq;
138:
1.83 rpaulo 139: extern struct callout in6_tmpaddrtimer_ch;
140:
1.2 itojun 141: int ip6_forward_srcrt; /* XXX */
142: int ip6_sourcecheck; /* XXX */
143: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 144:
1.29 thorpej 145: #ifdef PFIL_HOOKS
146: struct pfil_head inet6_pfil_hook;
147: #endif
148:
1.2 itojun 149: struct ip6stat ip6stat;
150:
151: static void ip6_init2 __P((void *));
1.81 rpaulo 152: static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *));
1.2 itojun 153:
1.5 itojun 154: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
1.62 itojun 155: static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));
1.2 itojun 156:
157: /*
158: * IP6 initialization: fill in IP6 protocol switch table.
159: * All protocols not implemented in kernel go to raw IP6 protocol handler.
160: */
161: void
162: ip6_init()
163: {
1.78 christos 164: const struct ip6protosw *pr;
1.35 itojun 165: int i;
1.2 itojun 166:
1.78 christos 167: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 168: if (pr == 0)
169: panic("ip6_init");
170: for (i = 0; i < IPPROTO_MAX; i++)
171: ip6_protox[i] = pr - inet6sw;
1.78 christos 172: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
173: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 174: if (pr->pr_domain->dom_family == PF_INET6 &&
175: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
176: ip6_protox[pr->pr_protocol] = pr - inet6sw;
177: ip6intrq.ifq_maxlen = ip6qmaxlen;
1.81 rpaulo 178: scope6_init();
179: addrsel_policy_init();
1.2 itojun 180: nd6_init();
181: frag6_init();
1.83 rpaulo 182: ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 183:
184: ip6_init2((void *)0);
1.29 thorpej 185:
186: #ifdef PFIL_HOOKS
187: /* Register our Packet Filter hook. */
1.33 thorpej 188: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
189: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 190: i = pfil_head_register(&inet6_pfil_hook);
191: if (i != 0)
192: printf("ip6_init: WARNING: unable to register pfil hook, "
193: "error %d\n", i);
194: #endif /* PFIL_HOOKS */
1.2 itojun 195: }
196:
197: static void
1.90 christos 198: ip6_init2(void *dummy)
1.2 itojun 199: {
200:
201: /* nd6_timer_init */
1.19 thorpej 202: callout_init(&nd6_timer_ch);
203: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83 rpaulo 204:
205: /* timer for regeneranation of temporary addresses randomize ID */
206: callout_init(&in6_tmpaddrtimer_ch);
207: callout_reset(&in6_tmpaddrtimer_ch,
208: (ip6_temp_preferred_lifetime - ip6_desync_factor -
209: ip6_temp_regen_advance) * hz,
210: in6_tmpaddrtimer, NULL);
1.2 itojun 211: }
212:
213: /*
214: * IP6 input interrupt handling. Just pass the packet to ip6_input.
215: */
216: void
217: ip6intr()
218: {
219: int s;
220: struct mbuf *m;
221:
222: for (;;) {
1.41 thorpej 223: s = splnet();
1.2 itojun 224: IF_DEQUEUE(&ip6intrq, m);
225: splx(s);
226: if (m == 0)
227: return;
1.83 rpaulo 228: /* drop the packet if IPv6 operation is disabled on the IF */
229: if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {
230: m_freem(m);
231: return;
232: }
1.2 itojun 233: ip6_input(m);
234: }
235: }
236:
237: extern struct route_in6 ip6_forward_rt;
238:
239: void
240: ip6_input(m)
241: struct mbuf *m;
242: {
1.9 itojun 243: struct ip6_hdr *ip6;
1.2 itojun 244: int off = sizeof(struct ip6_hdr), nest;
245: u_int32_t plen;
1.5 itojun 246: u_int32_t rtalert = ~0;
1.2 itojun 247: int nxt, ours = 0;
1.9 itojun 248: struct ifnet *deliverifp = NULL;
1.64 itojun 249: int srcrt = 0;
1.90.2.1.2.1 wrstuden 250: #ifdef FAST_IPSEC
251: struct m_tag *mtag;
252: struct tdb_ident *tdbi;
253: struct secpolicy *sp;
254: int s, error;
255: #endif
1.2 itojun 256:
257: #ifdef IPSEC
258: /*
259: * should the inner packet be considered authentic?
260: * see comment in ah4_input().
261: */
1.49 itojun 262: m->m_flags &= ~M_AUTHIPHDR;
263: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 264: #endif
1.9 itojun 265:
1.2 itojun 266: /*
1.81 rpaulo 267: * make sure we don't have onion peering information into m_tag.
268: */
269: ip6_delaux(m);
270:
271: /*
1.44 itojun 272: * mbuf statistics
1.2 itojun 273: */
274: if (m->m_flags & M_EXT) {
275: if (m->m_next)
276: ip6stat.ip6s_mext2m++;
277: else
278: ip6stat.ip6s_mext1++;
279: } else {
1.40 itojun 280: #define M2MMAX (sizeof(ip6stat.ip6s_m2m)/sizeof(ip6stat.ip6s_m2m[0]))
1.2 itojun 281: if (m->m_next) {
1.9 itojun 282: if (m->m_flags & M_LOOP) {
1.77 peter 283: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 284: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 285: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
286: else
287: ip6stat.ip6s_m2m[0]++;
288: } else
289: ip6stat.ip6s_m1++;
1.40 itojun 290: #undef M2MMAX
1.2 itojun 291: }
292:
1.9 itojun 293: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
294: ip6stat.ip6s_total++;
295:
1.57 thorpej 296: /*
297: * If the IPv6 header is not aligned, slurp it up into a new
298: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 299: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 300: * IPv6 header is in the first mbuf of the chain.
301: */
302: if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
303: struct ifnet *inifp = m->m_pkthdr.rcvif;
304: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
305: (max_linkhdr + 3) & ~3)) == NULL) {
306: /* XXXJRT new stat, please */
307: ip6stat.ip6s_toosmall++;
308: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
309: return;
310: }
311: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
312: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 313: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 314: ip6stat.ip6s_toosmall++;
315: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
316: return;
317: }
1.2 itojun 318: }
319:
320: ip6 = mtod(m, struct ip6_hdr *);
321:
322: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
323: ip6stat.ip6s_badvers++;
1.9 itojun 324: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 325: goto bad;
326: }
1.15 darrenr 327:
328: #ifdef PFIL_HOOKS
329: /*
330: * Run through list of hooks for input packets. If there are any
331: * filters which require that additional packets in the flow are
332: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
333: * Note that filters must _never_ set this flag, as another filter
334: * in the list may have previously cleared it.
335: */
1.39 itojun 336: /*
337: * let ipfilter look at packet on the wire,
338: * not the decapsulated packet.
339: */
340: #ifdef IPSEC
1.42 itojun 341: if (!ipsec_getnhist(m))
1.90.2.1.2.1 wrstuden 342: #elif defined(FAST_IPSEC)
343: if (!ipsec_indone(m))
1.39 itojun 344: #else
345: if (1)
346: #endif
347: {
1.64 itojun 348: struct in6_addr odst;
349:
350: odst = ip6->ip6_dst;
1.39 itojun 351: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
352: PFIL_IN) != 0)
353: return;
354: if (m == NULL)
355: return;
356: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 357: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 358: }
1.15 darrenr 359: #endif /* PFIL_HOOKS */
360:
1.2 itojun 361: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
362:
1.30 thorpej 363: #ifdef ALTQ
364: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
365: /* packet is dropped by traffic conditioner */
366: return;
1.9 itojun 367: }
368: #endif
369:
1.2 itojun 370: /*
1.44 itojun 371: * Check against address spoofing/corruption.
1.2 itojun 372: */
373: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
374: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 375: /*
376: * XXX: "badscope" is not very suitable for a multicast source.
377: */
1.2 itojun 378: ip6stat.ip6s_badscope++;
1.9 itojun 379: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 380: goto bad;
381: }
1.13 itojun 382: /*
1.44 itojun 383: * The following check is not documented in specs. A malicious
384: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
385: * and bypass security checks (act as if it was from 127.0.0.1 by using
386: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 387: *
1.44 itojun 388: * This check chokes if we are in an SIIT cloud. As none of BSDs
389: * support IPv4-less kernel compilation, we cannot support SIIT
390: * environment at all. So, it makes more sense for us to reject any
391: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 392: * partial support for SIIT environment.
1.13 itojun 393: */
394: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
395: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
396: ip6stat.ip6s_badscope++;
397: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
398: goto bad;
399: }
1.17 itojun 400: #if 0
1.13 itojun 401: /*
1.17 itojun 402: * Reject packets with IPv4 compatible addresses (auto tunnel).
403: *
404: * The code forbids auto tunnel relay case in RFC1933 (the check is
405: * stronger than RFC1933). We may want to re-enable it if mech-xx
406: * is revised to forbid relaying case.
1.13 itojun 407: */
408: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
409: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
410: ip6stat.ip6s_badscope++;
411: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
412: goto bad;
413: }
414: #endif
1.35 itojun 415:
1.2 itojun 416: /*
1.82 yamt 417: * Disambiguate address scope zones (if there is ambiguity).
418: * We first make sure that the original source or destination address
419: * is not in our internal form for scoped addresses. Such addresses
420: * are not necessarily invalid spec-wise, but we cannot accept them due
421: * to the usage conflict.
422: * in6_setscope() then also checks and rejects the cases where src or
423: * dst are the loopback address and the receiving interface
424: * is not loopback.
425: */
1.88 bouyer 426: if (__predict_false(
427: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
428: goto bad;
429: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 430: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
431: ip6stat.ip6s_badscope++; /* XXX */
432: goto bad;
433: }
434: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
435: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
436: ip6stat.ip6s_badscope++;
437: goto bad;
438: }
439:
440: /*
1.2 itojun 441: * Multicast check
442: */
443: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
444: struct in6_multi *in6m = 0;
1.9 itojun 445:
446: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 447: /*
448: * See if we belong to the destination multicast group on the
449: * arrival interface.
450: */
451: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
452: if (in6m)
453: ours = 1;
454: else if (!ip6_mrouter) {
455: ip6stat.ip6s_notmember++;
456: ip6stat.ip6s_cantforward++;
1.9 itojun 457: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 458: goto bad;
459: }
1.9 itojun 460: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 461: goto hbhcheck;
462: }
463:
464: /*
465: * Unicast check
466: */
1.22 itojun 467: if (ip6_forward_rt.ro_rt != NULL &&
1.55 itojun 468: (ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 &&
1.22 itojun 469: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.72 itojun 470: &((struct sockaddr_in6 *)(&ip6_forward_rt.ro_dst))->sin6_addr))
1.25 itojun 471: ip6stat.ip6s_forward_cachehit++;
1.22 itojun 472: else {
1.35 itojun 473: struct sockaddr_in6 *dst6;
474:
1.2 itojun 475: if (ip6_forward_rt.ro_rt) {
1.22 itojun 476: /* route is down or destination is different */
1.25 itojun 477: ip6stat.ip6s_forward_cachemiss++;
1.2 itojun 478: RTFREE(ip6_forward_rt.ro_rt);
479: ip6_forward_rt.ro_rt = 0;
480: }
1.22 itojun 481:
1.2 itojun 482: bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6));
1.35 itojun 483: dst6 = (struct sockaddr_in6 *)&ip6_forward_rt.ro_dst;
484: dst6->sin6_len = sizeof(struct sockaddr_in6);
485: dst6->sin6_family = AF_INET6;
486: dst6->sin6_addr = ip6->ip6_dst;
1.2 itojun 487:
1.9 itojun 488: rtalloc((struct route *)&ip6_forward_rt);
1.2 itojun 489: }
490:
491: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
492:
493: /*
494: * Accept the packet if the forwarding interface to the destination
495: * according to the routing table is the loopback interface,
496: * unless the associated route has a gateway.
497: * Note that this approach causes to accept a packet if there is a
498: * route to the loopback interface for the destination of the packet.
499: * But we think it's even useful in some situations, e.g. when using
500: * a special daemon which wants to intercept the packet.
501: */
502: if (ip6_forward_rt.ro_rt &&
503: (ip6_forward_rt.ro_rt->rt_flags &
504: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55 itojun 505: !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2 itojun 506: #if 0
507: /*
508: * The check below is redundant since the comparison of
509: * the destination and the key of the rtentry has
510: * already done through looking up the routing table.
511: */
512: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55 itojun 513: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2 itojun 514: #endif
1.9 itojun 515: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 516: struct in6_ifaddr *ia6 =
517: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
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: */
1.2 itojun 524: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
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. */
1.34 itojun 531: nd6log((LOG_INFO,
1.27 itojun 532: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 533: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 534: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 535:
536: goto bad;
1.2 itojun 537: }
538: }
539:
540: /*
1.55 itojun 541: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 542: */
543: #if defined(NFAITH) && 0 < NFAITH
544: if (ip6_keepfaith) {
1.71 itojun 545: if (ip6_forward_rt.ro_rt && ip6_forward_rt.ro_rt->rt_ifp &&
546: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 547: /* XXX do we need more sanity checks? */
548: ours = 1;
1.45 itojun 549: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 550: goto hbhcheck;
551: }
552: }
553: #endif
554:
555: #if 0
556: {
557: /*
558: * Last resort: check in6_ifaddr for incoming interface.
559: * The code is here until I update the "goto ours hack" code above
560: * working right.
561: */
562: struct ifaddr *ifa;
563: for (ifa = m->m_pkthdr.rcvif->if_addrlist.tqh_first;
564: ifa;
565: ifa = ifa->ifa_list.tqe_next) {
566: if (ifa->ifa_addr == NULL)
567: continue; /* just for safety */
568: if (ifa->ifa_addr->sa_family != AF_INET6)
569: continue;
570: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
571: ours = 1;
572: deliverifp = ifa->ifa_ifp;
1.2 itojun 573: goto hbhcheck;
574: }
575: }
1.9 itojun 576: }
1.2 itojun 577: #endif
578:
579: /*
580: * Now there is no reason to process the packet if it's not our own
581: * and we're not a router.
582: */
583: if (!ip6_forwarding) {
584: ip6stat.ip6s_cantforward++;
1.9 itojun 585: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 586: goto bad;
587: }
588:
589: hbhcheck:
590: /*
1.81 rpaulo 591: * record address information into m_tag, if we don't have one yet.
592: * note that we are unable to record it, if the address is not listed
593: * as our interface address (e.g. multicast addresses, addresses
594: * within FAITH prefixes and such).
595: */
596: if (deliverifp && !ip6_getdstifaddr(m)) {
597: struct in6_ifaddr *ia6;
598:
599: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
600: if (ia6) {
601: if (!ip6_setdstifaddr(m, ia6)) {
602: /*
603: * XXX maybe we should drop the packet here,
604: * as we could not provide enough information
605: * to the upper layers.
606: */
607: }
608: }
609: }
610:
611: /*
1.2 itojun 612: * Process Hop-by-Hop options header if it's contained.
613: * m may be modified in ip6_hopopts_input().
614: * If a JumboPayload option is included, plen will also be modified.
615: */
616: plen = (u_int32_t)ntohs(ip6->ip6_plen);
617: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 618: struct ip6_hbh *hbh;
619:
620: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
621: #if 0 /*touches NULL pointer*/
622: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
623: #endif
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: */
641: ip6stat.ip6s_badoptions++;
642: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
643: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
644: icmp6_error(m, ICMP6_PARAM_PROB,
645: ICMP6_PARAMPROB_HEADER,
646: (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
647: return;
648: }
1.9 itojun 649: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
650: sizeof(struct ip6_hbh));
651: if (hbh == NULL) {
652: ip6stat.ip6s_tooshort++;
653: return;
654: }
1.57 thorpej 655: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 656: nxt = hbh->ip6h_nxt;
1.2 itojun 657:
658: /*
659: * accept the packet if a router alert option is included
660: * and we act as an IPv6 router.
661: */
1.5 itojun 662: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 663: ours = 1;
664: } else
665: nxt = ip6->ip6_nxt;
666:
667: /*
668: * Check that the amount of data in the buffers
669: * is as at least much as the IPv6 header would have us expect.
670: * Trim mbufs if longer than we expect.
671: * Drop packet if shorter than we expect.
672: */
673: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
674: ip6stat.ip6s_tooshort++;
1.9 itojun 675: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 676: goto bad;
677: }
678: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
679: if (m->m_len == m->m_pkthdr.len) {
680: m->m_len = sizeof(struct ip6_hdr) + plen;
681: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
682: } else
683: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
684: }
685:
686: /*
687: * Forward if desirable.
688: */
689: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
690: /*
691: * If we are acting as a multicast router, all
692: * incoming multicast packets are passed to the
693: * kernel-level multicast forwarding function.
694: * The packet is returned (relatively) intact; if
695: * ip6_mforward() returns a non-zero value, the packet
696: * must be discarded, else it may be accepted below.
697: */
698: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
699: ip6stat.ip6s_cantforward++;
700: m_freem(m);
701: return;
702: }
703: if (!ours) {
704: m_freem(m);
705: return;
706: }
1.22 itojun 707: } else if (!ours) {
1.64 itojun 708: ip6_forward(m, srcrt);
1.2 itojun 709: return;
1.56 itojun 710: }
1.25 itojun 711:
712: ip6 = mtod(m, struct ip6_hdr *);
713:
714: /*
715: * Malicious party may be able to use IPv4 mapped addr to confuse
716: * tcp/udp stack and bypass security checks (act as if it was from
717: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
718: *
719: * For SIIT end node behavior, you may want to disable the check.
720: * However, you will become vulnerable to attacks using IPv4 mapped
721: * source.
722: */
723: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
724: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
725: ip6stat.ip6s_badscope++;
726: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
727: goto bad;
728: }
1.2 itojun 729:
730: /*
731: * Tell launch routine the next header
732: */
1.12 itojun 733: #ifdef IFA_STATS
1.28 itojun 734: if (deliverifp != NULL) {
1.9 itojun 735: struct in6_ifaddr *ia6;
736: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
737: if (ia6)
738: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
739: }
740: #endif
1.2 itojun 741: ip6stat.ip6s_delivered++;
1.9 itojun 742: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 743: nest = 0;
1.40 itojun 744:
1.2 itojun 745: while (nxt != IPPROTO_DONE) {
746: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
747: ip6stat.ip6s_toomanyhdr++;
748: goto bad;
749: }
1.8 itojun 750:
751: /*
752: * protection against faulty packet - there should be
753: * more sanity checks in header chain processing.
754: */
755: if (m->m_pkthdr.len < off) {
756: ip6stat.ip6s_tooshort++;
1.9 itojun 757: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 758: goto bad;
759: }
760:
1.37 itojun 761: #ifdef IPSEC
762: /*
763: * enforce IPsec policy checking if we are seeing last header.
764: * note that we do not visit this with protocols with pcb layer
765: * code - like udp/tcp/raw ip.
766: */
767: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
768: ipsec6_in_reject(m, NULL)) {
769: ipsec6stat.in_polvio++;
770: goto bad;
771: }
772: #endif
1.90.2.1.2.1 wrstuden 773: #ifdef FAST_IPSEC
774: /*
775: * enforce IPsec policy checking if we are seeing last header.
776: * note that we do not visit this with protocols with pcb layer
777: * code - like udp/tcp/raw ip.
778: */
779: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
780: /*
781: * Check if the packet has already had IPsec processing
782: * done. If so, then just pass it along. This tag gets
783: * set during AH, ESP, etc. input handling, before the
784: * packet is returned to the ip input queue for delivery.
785: */
786: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
787: s = splsoftnet();
788: if (mtag != NULL) {
789: tdbi = (struct tdb_ident *)(mtag + 1);
790: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
791: } else {
792: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
793: IP_FORWARDING, &error);
794: }
795: if (sp != NULL) {
796: /*
797: * Check security policy against packet attributes.
798: */
799: error = ipsec_in_reject(sp, m);
800: KEY_FREESP(&sp);
801: } else {
802: /* XXX error stat??? */
803: error = EINVAL;
804: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
805: }
806: splx(s);
807: if (error)
808: goto bad;
809: }
810: #endif /* FAST_IPSEC */
811:
1.56 itojun 812:
1.2 itojun 813: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
814: }
815: return;
816: bad:
817: m_freem(m);
818: }
819:
820: /*
1.81 rpaulo 821: * set/grab in6_ifaddr correspond to IPv6 destination address.
822: */
823: static struct m_tag *
824: ip6_setdstifaddr(m, ia6)
825: struct mbuf *m;
826: struct in6_ifaddr *ia6;
827: {
828: struct m_tag *mtag;
829:
830: mtag = ip6_addaux(m);
831: if (mtag)
832: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
833: return mtag; /* NULL if failed to set */
834: }
835:
836: struct in6_ifaddr *
837: ip6_getdstifaddr(m)
838: struct mbuf *m;
839: {
840: struct m_tag *mtag;
841:
842: mtag = ip6_findaux(m);
843: if (mtag)
844: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
845: else
846: return NULL;
847: }
848:
849: /*
1.2 itojun 850: * Hop-by-Hop options header processing. If a valid jumbo payload option is
851: * included, the real payload length will be stored in plenp.
852: */
853: static int
854: ip6_hopopts_input(plenp, rtalertp, mp, offp)
855: u_int32_t *plenp;
1.5 itojun 856: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 857: struct mbuf **mp;
858: int *offp;
859: {
1.35 itojun 860: struct mbuf *m = *mp;
1.2 itojun 861: int off = *offp, hbhlen;
862: struct ip6_hbh *hbh;
863:
864: /* validation of the length of the header */
1.9 itojun 865: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
866: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
867: if (hbh == NULL) {
868: ip6stat.ip6s_tooshort++;
869: return -1;
870: }
871: hbhlen = (hbh->ip6h_len + 1) << 3;
872: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
873: hbhlen);
874: if (hbh == NULL) {
875: ip6stat.ip6s_tooshort++;
876: return -1;
877: }
1.57 thorpej 878: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 879: off += hbhlen;
880: hbhlen -= sizeof(struct ip6_hbh);
881:
882: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
883: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 884: return (-1);
1.2 itojun 885:
886: *offp = off;
887: *mp = m;
1.58 itojun 888: return (0);
1.2 itojun 889: }
890:
891: /*
892: * Search header for all Hop-by-hop options and process each option.
893: * This function is separate from ip6_hopopts_input() in order to
894: * handle a case where the sending node itself process its hop-by-hop
895: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 896: *
897: * The function assumes that hbh header is located right after the IPv6 header
898: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
899: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 900: */
901: int
902: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
903: struct mbuf *m;
904: u_int8_t *opthead;
905: int hbhlen;
1.5 itojun 906: u_int32_t *rtalertp;
1.2 itojun 907: u_int32_t *plenp;
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) {
923: ip6stat.ip6s_toosmall++;
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) {
931: ip6stat.ip6s_toosmall++;
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;
942: bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
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) {
948: ip6stat.ip6s_toosmall++;
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) {
966: ip6stat.ip6s_badoptions++;
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: */
977: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
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) {
990: ip6stat.ip6s_badoptions++;
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) {
1002: ip6stat.ip6s_badoptions++;
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) {
1013: ip6stat.ip6s_toosmall++;
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
1039: ip6_unknown_opt(optp, m, off)
1040: u_int8_t *optp;
1041: struct mbuf *m;
1042: int off;
1043: {
1044: struct ip6_hdr *ip6;
1045:
1.35 itojun 1046: switch (IP6OPT_TYPE(*optp)) {
1047: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1048: return ((int)*(optp + 1));
1.35 itojun 1049: case IP6OPT_TYPE_DISCARD: /* silently discard */
1050: m_freem(m);
1.58 itojun 1051: return (-1);
1.35 itojun 1052: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1053: ip6stat.ip6s_badoptions++;
1054: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1055: return (-1);
1.35 itojun 1056: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1057: ip6stat.ip6s_badoptions++;
1058: ip6 = mtod(m, struct ip6_hdr *);
1059: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1060: (m->m_flags & (M_BCAST|M_MCAST)))
1061: m_freem(m);
1062: else
1063: icmp6_error(m, ICMP6_PARAM_PROB,
1064: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1065: return (-1);
1.2 itojun 1066: }
1067:
1068: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1069: return (-1);
1.2 itojun 1070: }
1071:
1072: /*
1.9 itojun 1073: * Create the "control" list for this pcb.
1074: *
1075: * The routine will be called from upper layer handlers like tcp6_input().
1076: * Thus the routine assumes that the caller (tcp6_input) have already
1077: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1078: * very first mbuf on the mbuf chain.
1079: * We may want to add some infinite loop prevention or sanity checks for safety.
1080: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1081: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1082: */
1083: void
1084: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 1085: struct in6pcb *in6p;
1086: struct mbuf **mp;
1087: struct ip6_hdr *ip6;
1088: struct mbuf *m;
1.2 itojun 1089: {
1.85 rpaulo 1090: #ifdef RFC2292
1091: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1092: #else
1093: #define IS2292(x, y) (y)
1094: #endif
1095:
1.9 itojun 1096: #ifdef SO_TIMESTAMP
1.2 itojun 1097: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1098: struct timeval tv;
1099:
1100: microtime(&tv);
1101: *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
1.63 itojun 1102: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1103: if (*mp)
1104: mp = &(*mp)->m_next;
1105: }
1.9 itojun 1106: #endif
1.87 rpaulo 1107:
1108: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1109: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1110: return;
1111:
1.2 itojun 1112: /* RFC 2292 sec. 5 */
1.35 itojun 1113: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1114: struct in6_pktinfo pi6;
1.85 rpaulo 1115:
1.2 itojun 1116: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1117: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1118: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1119: m->m_pkthdr.rcvif->if_index : 0;
1.2 itojun 1120: *mp = sbcreatecontrol((caddr_t) &pi6,
1.85 rpaulo 1121: sizeof(struct in6_pktinfo),
1122: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1123: if (*mp)
1124: mp = &(*mp)->m_next;
1125: }
1.85 rpaulo 1126:
1.2 itojun 1127: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1128: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1129:
1.63 itojun 1130: *mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),
1.85 rpaulo 1131: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1132: if (*mp)
1133: mp = &(*mp)->m_next;
1134: }
1135:
1136: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1137: u_int32_t flowinfo;
1138: int tclass;
1139:
1140: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1141: flowinfo >>= 20;
1142:
1143: tclass = flowinfo & 0xff;
1144: *mp = sbcreatecontrol((caddr_t)&tclass, sizeof(tclass),
1145: IPV6_TCLASS, IPPROTO_IPV6);
1146:
1.2 itojun 1147: if (*mp)
1148: mp = &(*mp)->m_next;
1149: }
1150:
1151: /*
1.75 itojun 1152: * IPV6_HOPOPTS socket option. Recall that we required super-user
1153: * privilege for the option (see ip6_ctloutput), but it might be too
1154: * strict, since there might be some hop-by-hop options which can be
1155: * returned to normal user.
1.85 rpaulo 1156: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1157: */
1.75 itojun 1158: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1159: /*
1160: * Check if a hop-by-hop options header is contatined in the
1161: * received packet, and if so, store the options as ancillary
1162: * data. Note that a hop-by-hop options header must be
1163: * just after the IPv6 header, which fact is assured through
1164: * the IPv6 input processing.
1165: */
1.78 christos 1166: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1167: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1168: struct ip6_hbh *hbh;
1169: int hbhlen;
1.62 itojun 1170: struct mbuf *ext;
1.9 itojun 1171:
1.62 itojun 1172: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1173: xip6->ip6_nxt);
1.62 itojun 1174: if (ext == NULL) {
1.9 itojun 1175: ip6stat.ip6s_tooshort++;
1176: return;
1177: }
1.62 itojun 1178: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1179: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1180: if (hbhlen != ext->m_len) {
1181: m_freem(ext);
1.9 itojun 1182: ip6stat.ip6s_tooshort++;
1183: return;
1184: }
1.2 itojun 1185:
1186: /*
1187: * XXX: We copy whole the header even if a jumbo
1188: * payload option is included, which option is to
1189: * be removed before returning in the RFC 2292.
1.85 rpaulo 1190: * Note: this constraint is removed in RFC3542.
1.2 itojun 1191: */
1.9 itojun 1192: *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
1.85 rpaulo 1193: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1194: IPPROTO_IPV6);
1.2 itojun 1195: if (*mp)
1196: mp = &(*mp)->m_next;
1.62 itojun 1197: m_freem(ext);
1.2 itojun 1198: }
1199: }
1200:
1201: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1202: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1203: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1204: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1205:
1206: /*
1207: * Search for destination options headers or routing
1208: * header(s) through the header chain, and stores each
1209: * header as ancillary data.
1210: * Note that the order of the headers remains in
1211: * the chain of ancillary data.
1212: */
1.86 rpaulo 1213: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1214: struct ip6_ext *ip6e = NULL;
1.9 itojun 1215: int elen;
1.62 itojun 1216: struct mbuf *ext = NULL;
1.9 itojun 1217:
1.62 itojun 1218: /*
1219: * if it is not an extension header, don't try to
1220: * pull it from the chain.
1221: */
1222: switch (nxt) {
1223: case IPPROTO_DSTOPTS:
1224: case IPPROTO_ROUTING:
1225: case IPPROTO_HOPOPTS:
1226: case IPPROTO_AH: /* is it possible? */
1227: break;
1228: default:
1229: goto loopend;
1230: }
1231:
1232: ext = ip6_pullexthdr(m, off, nxt);
1233: if (ext == NULL) {
1.9 itojun 1234: ip6stat.ip6s_tooshort++;
1235: return;
1236: }
1.62 itojun 1237: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1238: if (nxt == IPPROTO_AH)
1239: elen = (ip6e->ip6e_len + 2) << 2;
1240: else
1241: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1242: if (elen != ext->m_len) {
1243: m_freem(ext);
1.9 itojun 1244: ip6stat.ip6s_tooshort++;
1245: return;
1246: }
1.57 thorpej 1247: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1248:
1.35 itojun 1249: switch (nxt) {
1.62 itojun 1250: case IPPROTO_DSTOPTS:
1.35 itojun 1251: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1252: break;
1253:
1254: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.85 rpaulo 1255: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1256: IPPROTO_IPV6);
1.35 itojun 1257: if (*mp)
1258: mp = &(*mp)->m_next;
1259: break;
1260:
1261: case IPPROTO_ROUTING:
1262: if (!in6p->in6p_flags & IN6P_RTHDR)
1263: break;
1264:
1265: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.85 rpaulo 1266: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1267: IPPROTO_IPV6);
1.35 itojun 1268: if (*mp)
1269: mp = &(*mp)->m_next;
1270: break;
1271:
1.62 itojun 1272: case IPPROTO_HOPOPTS:
1273: case IPPROTO_AH: /* is it possible? */
1274: break;
1275:
1.35 itojun 1276: default:
1277: /*
1.62 itojun 1278: * other cases have been filtered in the above.
1279: * none will visit this case. here we supply
1280: * the code just in case (nxt overwritten or
1281: * other cases).
1.35 itojun 1282: */
1.62 itojun 1283: m_freem(ext);
1.35 itojun 1284: goto loopend;
1285:
1.2 itojun 1286: }
1287:
1288: /* proceed with the next header. */
1.9 itojun 1289: off += elen;
1.2 itojun 1290: nxt = ip6e->ip6e_nxt;
1.62 itojun 1291: ip6e = NULL;
1292: m_freem(ext);
1293: ext = NULL;
1.2 itojun 1294: }
1295: loopend:
1.62 itojun 1296: ;
1.2 itojun 1297: }
1.62 itojun 1298: }
1.85 rpaulo 1299: #undef IS2292
1300:
1301:
1302: void
1303: ip6_notify_pmtu(struct in6pcb *in6p, struct sockaddr_in6 *dst, uint32_t *mtu)
1304: {
1305: struct socket *so;
1306: struct mbuf *m_mtu;
1307: struct ip6_mtuinfo mtuctl;
1308:
1309: so = in6p->in6p_socket;
1310:
1311: if (mtu == NULL)
1312: return;
1313:
1314: #ifdef DIAGNOSTIC
1315: if (so == NULL) /* I believe this is impossible */
1316: panic("ip6_notify_pmtu: socket is NULL");
1317: #endif
1318:
1319: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1320: mtuctl.ip6m_mtu = *mtu;
1321: mtuctl.ip6m_addr = *dst;
1322: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1323: return;
1324:
1325: if ((m_mtu = sbcreatecontrol((caddr_t)&mtuctl, sizeof(mtuctl),
1326: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1327: return;
1328:
1329: if (sbappendaddr(&so->so_rcv, (struct sockaddr *)dst, NULL, m_mtu)
1330: == 0) {
1331: m_freem(m_mtu);
1332: /* XXX: should count statistics */
1333: } else
1334: sorwakeup(so);
1335:
1336: return;
1337: }
1.62 itojun 1338:
1339: /*
1340: * pull single extension header from mbuf chain. returns single mbuf that
1341: * contains the result, or NULL on error.
1342: */
1343: static struct mbuf *
1344: ip6_pullexthdr(m, off, nxt)
1345: struct mbuf *m;
1346: size_t off;
1347: int nxt;
1348: {
1349: struct ip6_ext ip6e;
1350: size_t elen;
1351: struct mbuf *n;
1352:
1353: #ifdef DIAGNOSTIC
1354: switch (nxt) {
1355: case IPPROTO_DSTOPTS:
1356: case IPPROTO_ROUTING:
1357: case IPPROTO_HOPOPTS:
1358: case IPPROTO_AH: /* is it possible? */
1359: break;
1360: default:
1361: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1362: }
1.62 itojun 1363: #endif
1.2 itojun 1364:
1.62 itojun 1365: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1366: if (nxt == IPPROTO_AH)
1367: elen = (ip6e.ip6e_len + 2) << 2;
1368: else
1369: elen = (ip6e.ip6e_len + 1) << 3;
1370:
1371: MGET(n, M_DONTWAIT, MT_DATA);
1372: if (n && elen >= MLEN) {
1373: MCLGET(n, M_DONTWAIT);
1374: if ((n->m_flags & M_EXT) == 0) {
1375: m_free(n);
1376: n = NULL;
1377: }
1378: }
1379: if (!n)
1380: return NULL;
1381:
1382: n->m_len = 0;
1383: if (elen >= M_TRAILINGSPACE(n)) {
1384: m_free(n);
1385: return NULL;
1386: }
1387:
1388: m_copydata(m, off, elen, mtod(n, caddr_t));
1389: n->m_len = elen;
1390: return n;
1.2 itojun 1391: }
1392:
1393: /*
1394: * Get pointer to the previous header followed by the header
1395: * currently processed.
1396: * XXX: This function supposes that
1397: * M includes all headers,
1398: * the next header field and the header length field of each header
1399: * are valid, and
1400: * the sum of each header length equals to OFF.
1401: * Because of these assumptions, this function must be called very
1402: * carefully. Moreover, it will not be used in the near future when
1403: * we develop `neater' mechanism to process extension headers.
1404: */
1.58 itojun 1405: u_int8_t *
1.2 itojun 1406: ip6_get_prevhdr(m, off)
1407: struct mbuf *m;
1408: int off;
1409: {
1410: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1411:
1412: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1413: return (&ip6->ip6_nxt);
1.2 itojun 1414: else {
1415: int len, nxt;
1416: struct ip6_ext *ip6e = NULL;
1417:
1418: nxt = ip6->ip6_nxt;
1419: len = sizeof(struct ip6_hdr);
1420: while (len < off) {
1421: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
1422:
1.35 itojun 1423: switch (nxt) {
1.2 itojun 1424: case IPPROTO_FRAGMENT:
1425: len += sizeof(struct ip6_frag);
1426: break;
1427: case IPPROTO_AH:
1428: len += (ip6e->ip6e_len + 2) << 2;
1429: break;
1430: default:
1431: len += (ip6e->ip6e_len + 1) << 3;
1432: break;
1433: }
1434: nxt = ip6e->ip6e_nxt;
1435: }
1436: if (ip6e)
1.58 itojun 1437: return (&ip6e->ip6e_nxt);
1.2 itojun 1438: else
1439: return NULL;
1.18 itojun 1440: }
1441: }
1442:
1443: /*
1444: * get next header offset. m will be retained.
1445: */
1446: int
1447: ip6_nexthdr(m, off, proto, nxtp)
1448: struct mbuf *m;
1449: int off;
1450: int proto;
1451: int *nxtp;
1452: {
1453: struct ip6_hdr ip6;
1454: struct ip6_ext ip6e;
1455: struct ip6_frag fh;
1456:
1457: /* just in case */
1458: if (m == NULL)
1459: panic("ip6_nexthdr: m == NULL");
1460: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1461: return -1;
1462:
1463: switch (proto) {
1464: case IPPROTO_IPV6:
1.83 rpaulo 1465: /* do not chase beyond intermediate IPv6 headers */
1466: if (off != 0)
1467: return -1;
1.18 itojun 1468: if (m->m_pkthdr.len < off + sizeof(ip6))
1469: return -1;
1470: m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
1471: if (nxtp)
1472: *nxtp = ip6.ip6_nxt;
1473: off += sizeof(ip6);
1474: return off;
1475:
1476: case IPPROTO_FRAGMENT:
1477: /*
1478: * terminate parsing if it is not the first fragment,
1479: * it does not make sense to parse through it.
1480: */
1481: if (m->m_pkthdr.len < off + sizeof(fh))
1482: return -1;
1483: m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
1.67 itojun 1484: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1485: return -1;
1486: if (nxtp)
1487: *nxtp = fh.ip6f_nxt;
1488: off += sizeof(struct ip6_frag);
1489: return off;
1490:
1491: case IPPROTO_AH:
1492: if (m->m_pkthdr.len < off + sizeof(ip6e))
1493: return -1;
1494: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1495: if (nxtp)
1496: *nxtp = ip6e.ip6e_nxt;
1497: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1498: if (m->m_pkthdr.len < off)
1499: return -1;
1.18 itojun 1500: return off;
1501:
1502: case IPPROTO_HOPOPTS:
1503: case IPPROTO_ROUTING:
1504: case IPPROTO_DSTOPTS:
1505: if (m->m_pkthdr.len < off + sizeof(ip6e))
1506: return -1;
1507: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1508: if (nxtp)
1509: *nxtp = ip6e.ip6e_nxt;
1510: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1511: if (m->m_pkthdr.len < off)
1512: return -1;
1.18 itojun 1513: return off;
1514:
1515: case IPPROTO_NONE:
1516: case IPPROTO_ESP:
1517: case IPPROTO_IPCOMP:
1518: /* give up */
1519: return -1;
1520:
1521: default:
1522: return -1;
1523: }
1524: }
1525:
1526: /*
1527: * get offset for the last header in the chain. m will be kept untainted.
1528: */
1529: int
1530: ip6_lasthdr(m, off, proto, nxtp)
1531: struct mbuf *m;
1532: int off;
1533: int proto;
1534: int *nxtp;
1535: {
1536: int newoff;
1537: int nxt;
1538:
1539: if (!nxtp) {
1540: nxt = -1;
1541: nxtp = &nxt;
1542: }
1.86 rpaulo 1543: for (;;) {
1.18 itojun 1544: newoff = ip6_nexthdr(m, off, proto, nxtp);
1545: if (newoff < 0)
1546: return off;
1547: else if (newoff < off)
1548: return -1; /* invalid */
1549: else if (newoff == off)
1550: return newoff;
1551:
1552: off = newoff;
1553: proto = *nxtp;
1.2 itojun 1554: }
1555: }
1556:
1.81 rpaulo 1557: struct m_tag *
1558: ip6_addaux(m)
1559: struct mbuf *m;
1560: {
1561: struct m_tag *mtag;
1562:
1563: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1564: if (!mtag) {
1565: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1566: M_NOWAIT);
1567: if (mtag) {
1568: m_tag_prepend(m, mtag);
1569: bzero(mtag + 1, sizeof(struct ip6aux));
1570: }
1571: }
1572: return mtag;
1573: }
1574:
1575: struct m_tag *
1576: ip6_findaux(m)
1577: struct mbuf *m;
1578: {
1579: struct m_tag *mtag;
1580:
1581: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1582: return mtag;
1583: }
1584:
1585: void
1586: ip6_delaux(m)
1587: struct mbuf *m;
1588: {
1589: struct m_tag *mtag;
1590:
1591: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1592: if (mtag)
1593: m_tag_delete(m, mtag);
1594: }
1595:
1.90.2.1 bouyer 1596: static int
1597: sysctl_net_inet6_ip6_rht0(SYSCTLFN_ARGS)
1598: {
1599: int error, tmp;
1600: struct sysctlnode node;
1601:
1602: node = *rnode;
1603: tmp = ip6_rht0;
1604: node.sysctl_data = &tmp;
1605: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1606: if (error || newp == NULL)
1607: return error;
1608:
1609: switch (tmp) {
1610: case -1: /* disable processing */
1611: case 0: /* disable for host, enable for router */
1612: case 1: /* enable for all */
1613: break;
1614: default:
1615: return EINVAL;
1616: }
1617: ip6_rht0 = tmp;
1618: return 0;
1619: }
1620:
1.2 itojun 1621: /*
1622: * System control for IP6
1623: */
1624:
1625: u_char inet6ctlerrmap[PRC_NCMDS] = {
1626: 0, 0, 0, 0,
1627: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1628: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1629: EMSGSIZE, EHOSTUNREACH, 0, 0,
1630: 0, 0, 0, 0,
1631: ENOPROTOOPT
1632: };
1633:
1.70 atatat 1634: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1635: {
1.85 rpaulo 1636: #ifdef RFC2292
1637: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1638: #else
1639: #define IS2292(x, y) (y)
1640: #endif
1.26 itojun 1641:
1.73 atatat 1642: sysctl_createv(clog, 0, NULL, NULL,
1643: CTLFLAG_PERMANENT,
1.70 atatat 1644: CTLTYPE_NODE, "net", NULL,
1645: NULL, 0, NULL, 0,
1646: CTL_NET, CTL_EOL);
1.73 atatat 1647: sysctl_createv(clog, 0, NULL, NULL,
1648: CTLFLAG_PERMANENT,
1.74 atatat 1649: CTLTYPE_NODE, "inet6",
1650: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1651: NULL, 0, NULL, 0,
1652: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1653: sysctl_createv(clog, 0, NULL, NULL,
1654: CTLFLAG_PERMANENT,
1.74 atatat 1655: CTLTYPE_NODE, "ip6",
1656: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1657: NULL, 0, NULL, 0,
1658: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1659:
1.73 atatat 1660: sysctl_createv(clog, 0, NULL, NULL,
1661: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1662: CTLTYPE_INT, "forwarding",
1663: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1664: NULL, 0, &ip6_forwarding, 0,
1665: CTL_NET, PF_INET6, IPPROTO_IPV6,
1666: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1667: sysctl_createv(clog, 0, NULL, NULL,
1668: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1669: CTLTYPE_INT, "redirect",
1670: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1671: NULL, 0, &ip6_sendredirects, 0,
1672: CTL_NET, PF_INET6, IPPROTO_IPV6,
1673: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1674: sysctl_createv(clog, 0, NULL, NULL,
1675: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1676: CTLTYPE_INT, "hlim",
1677: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1678: NULL, 0, &ip6_defhlim, 0,
1679: CTL_NET, PF_INET6, IPPROTO_IPV6,
1680: IPV6CTL_DEFHLIM, CTL_EOL);
1681: #ifdef notyet
1.73 atatat 1682: sysctl_createv(clog, 0, NULL, NULL,
1683: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1684: CTLTYPE_INT, "mtu", NULL,
1685: NULL, 0, &, 0,
1686: CTL_NET, PF_INET6, IPPROTO_IPV6,
1687: IPV6CTL_DEFMTU, CTL_EOL);
1688: #endif
1689: #ifdef __no_idea__
1.73 atatat 1690: sysctl_createv(clog, 0, NULL, NULL,
1691: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1692: CTLTYPE_INT, "forwsrcrt", NULL,
1693: NULL, 0, &?, 0,
1694: CTL_NET, PF_INET6, IPPROTO_IPV6,
1695: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1696: sysctl_createv(clog, 0, NULL, NULL,
1697: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1698: CTLTYPE_STRUCT, "mrtstats", NULL,
1699: NULL, 0, &?, sizeof(?),
1700: CTL_NET, PF_INET6, IPPROTO_IPV6,
1701: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1702: sysctl_createv(clog, 0, NULL, NULL,
1703: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1704: CTLTYPE_?, "mrtproto", NULL,
1705: NULL, 0, &?, sizeof(?),
1706: CTL_NET, PF_INET6, IPPROTO_IPV6,
1707: IPV6CTL_MRTPROTO, CTL_EOL);
1708: #endif
1.73 atatat 1709: sysctl_createv(clog, 0, NULL, NULL,
1710: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1711: CTLTYPE_INT, "maxfragpackets",
1712: SYSCTL_DESCR("Maximum number of fragments to buffer "
1713: "for reassembly"),
1.70 atatat 1714: NULL, 0, &ip6_maxfragpackets, 0,
1715: CTL_NET, PF_INET6, IPPROTO_IPV6,
1716: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1717: #ifdef __no_idea__
1.73 atatat 1718: sysctl_createv(clog, 0, NULL, NULL,
1719: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1720: CTLTYPE_INT, "sourcecheck", NULL,
1721: NULL, 0, &?, 0,
1722: CTL_NET, PF_INET6, IPPROTO_IPV6,
1723: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1724: sysctl_createv(clog, 0, NULL, NULL,
1725: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1726: CTLTYPE_INT, "sourcecheck_logint", NULL,
1727: NULL, 0, &?, 0,
1728: CTL_NET, PF_INET6, IPPROTO_IPV6,
1729: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1730: #endif
1.73 atatat 1731: sysctl_createv(clog, 0, NULL, NULL,
1732: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1733: CTLTYPE_INT, "accept_rtadv",
1734: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1735: NULL, 0, &ip6_accept_rtadv, 0,
1736: CTL_NET, PF_INET6, IPPROTO_IPV6,
1737: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1738: sysctl_createv(clog, 0, NULL, NULL,
1739: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1740: CTLTYPE_INT, "keepfaith",
1741: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1742: NULL, 0, &ip6_keepfaith, 0,
1743: CTL_NET, PF_INET6, IPPROTO_IPV6,
1744: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1745: sysctl_createv(clog, 0, NULL, NULL,
1746: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1747: CTLTYPE_INT, "log_interval",
1748: SYSCTL_DESCR("Minumum interval between logging "
1749: "unroutable packets"),
1.70 atatat 1750: NULL, 0, &ip6_log_interval, 0,
1751: CTL_NET, PF_INET6, IPPROTO_IPV6,
1752: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1753: sysctl_createv(clog, 0, NULL, NULL,
1754: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1755: CTLTYPE_INT, "hdrnestlimit",
1756: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1757: NULL, 0, &ip6_hdrnestlimit, 0,
1758: CTL_NET, PF_INET6, IPPROTO_IPV6,
1759: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1760: sysctl_createv(clog, 0, NULL, NULL,
1761: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1762: CTLTYPE_INT, "dad_count",
1763: SYSCTL_DESCR("Number of Duplicate Address Detection "
1764: "probes to send"),
1.70 atatat 1765: NULL, 0, &ip6_dad_count, 0,
1766: CTL_NET, PF_INET6, IPPROTO_IPV6,
1767: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1768: sysctl_createv(clog, 0, NULL, NULL,
1769: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1770: CTLTYPE_INT, "auto_flowlabel",
1771: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1772: NULL, 0, &ip6_auto_flowlabel, 0,
1773: CTL_NET, PF_INET6, IPPROTO_IPV6,
1774: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1775: sysctl_createv(clog, 0, NULL, NULL,
1776: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1777: CTLTYPE_INT, "defmcasthlim",
1778: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1779: NULL, 0, &ip6_defmcasthlim, 0,
1780: CTL_NET, PF_INET6, IPPROTO_IPV6,
1781: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1782: #if NGIF > 0
1.73 atatat 1783: sysctl_createv(clog, 0, NULL, NULL,
1784: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1785: CTLTYPE_INT, "gifhlim",
1786: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1787: NULL, 0, &ip6_gif_hlim, 0,
1788: CTL_NET, PF_INET6, IPPROTO_IPV6,
1789: IPV6CTL_GIF_HLIM, CTL_EOL);
1790: #endif /* NGIF */
1.73 atatat 1791: sysctl_createv(clog, 0, NULL, NULL,
1792: CTLFLAG_PERMANENT,
1.74 atatat 1793: CTLTYPE_STRING, "kame_version",
1794: SYSCTL_DESCR("KAME Version"),
1.78 christos 1795: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1796: CTL_NET, PF_INET6, IPPROTO_IPV6,
1797: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1798: sysctl_createv(clog, 0, NULL, NULL,
1799: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1800: CTLTYPE_INT, "use_deprecated",
1801: SYSCTL_DESCR("Allow use of deprecated addresses as "
1802: "source addresses"),
1.70 atatat 1803: NULL, 0, &ip6_use_deprecated, 0,
1804: CTL_NET, PF_INET6, IPPROTO_IPV6,
1805: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1806: sysctl_createv(clog, 0, NULL, NULL,
1807: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1808: CTLTYPE_INT, "rr_prune", NULL,
1809: NULL, 0, &ip6_rr_prune, 0,
1810: CTL_NET, PF_INET6, IPPROTO_IPV6,
1811: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1812: sysctl_createv(clog, 0, NULL, NULL,
1813: CTLFLAG_PERMANENT
1.70 atatat 1814: #ifndef INET6_BINDV6ONLY
1.73 atatat 1815: |CTLFLAG_READWRITE,
1.70 atatat 1816: #endif
1.74 atatat 1817: CTLTYPE_INT, "v6only",
1818: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1819: "to PF_INET sockets"),
1.70 atatat 1820: NULL, 0, &ip6_v6only, 0,
1821: CTL_NET, PF_INET6, IPPROTO_IPV6,
1822: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1823: sysctl_createv(clog, 0, NULL, NULL,
1824: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1825: CTLTYPE_INT, "anonportmin",
1826: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1827: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1828: CTL_NET, PF_INET6, IPPROTO_IPV6,
1829: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1830: sysctl_createv(clog, 0, NULL, NULL,
1831: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1832: CTLTYPE_INT, "anonportmax",
1833: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1834: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1835: CTL_NET, PF_INET6, IPPROTO_IPV6,
1836: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1837: #ifndef IPNOPRIVPORTS
1.73 atatat 1838: sysctl_createv(clog, 0, NULL, NULL,
1839: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1840: CTLTYPE_INT, "lowportmin",
1841: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1842: "to assign"),
1.70 atatat 1843: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1844: CTL_NET, PF_INET6, IPPROTO_IPV6,
1845: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1846: sysctl_createv(clog, 0, NULL, NULL,
1847: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1848: CTLTYPE_INT, "lowportmax",
1849: SYSCTL_DESCR("Highest privileged ephemeral port number "
1850: "to assign"),
1.70 atatat 1851: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1852: CTL_NET, PF_INET6, IPPROTO_IPV6,
1853: IPV6CTL_LOWPORTMAX, CTL_EOL);
1854: #endif /* IPNOPRIVPORTS */
1.73 atatat 1855: sysctl_createv(clog, 0, NULL, NULL,
1856: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1857: CTLTYPE_INT, "use_tempaddr",
1858: SYSCTL_DESCR("Use temporary address"),
1859: NULL, 0, &ip6_use_tempaddr, 0,
1860: CTL_NET, PF_INET6, IPPROTO_IPV6,
1861: CTL_CREATE, CTL_EOL);
1862: sysctl_createv(clog, 0, NULL, NULL,
1863: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1864: CTLTYPE_INT, "temppltime",
1865: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1866: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1867: CTL_NET, PF_INET6, IPPROTO_IPV6,
1868: CTL_CREATE, CTL_EOL);
1869: sysctl_createv(clog, 0, NULL, NULL,
1870: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1871: CTLTYPE_INT, "tempvltime",
1872: SYSCTL_DESCR("valid lifetime of a temporary address"),
1873: NULL, 0, &ip6_temp_valid_lifetime, 0,
1874: CTL_NET, PF_INET6, IPPROTO_IPV6,
1875: CTL_CREATE, CTL_EOL);
1876: sysctl_createv(clog, 0, NULL, NULL,
1877: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1878: CTLTYPE_INT, "maxfrags",
1879: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1880: NULL, 0, &ip6_maxfrags, 0,
1881: CTL_NET, PF_INET6, IPPROTO_IPV6,
1882: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1883: sysctl_createv(clog, 0, NULL, NULL,
1884: CTLFLAG_PERMANENT,
1885: CTLTYPE_STRUCT, "stats",
1886: SYSCTL_DESCR("IPv6 statistics"),
1887: NULL, 0, &ip6stat, sizeof(ip6stat),
1888: CTL_NET, PF_INET6, IPPROTO_IPV6,
1889: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1890: sysctl_createv(clog, 0, NULL, NULL,
1891: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1892: CTLTYPE_INT, "use_defaultzone",
1893: SYSCTL_DESCR("Whether to use the default scope zones"),
1894: NULL, 0, &ip6_use_defzone, 0,
1895: CTL_NET, PF_INET6, IPPROTO_IPV6,
1896: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1897: sysctl_createv(clog, 0, NULL, NULL,
1898: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1899: CTLTYPE_INT, "mcast_pmtu",
1900: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1901: NULL, 0, &ip6_mcast_pmtu, 0,
1902: CTL_NET, PF_INET6, IPPROTO_IPV6,
1903: CTL_CREATE, CTL_EOL);
1.90.2.1 bouyer 1904: sysctl_createv(clog, 0, NULL, NULL,
1905: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1906: CTLTYPE_INT, "rht0",
1907: SYSCTL_DESCR("Processing of routing header type 0 (IPv6)"),
1908: sysctl_net_inet6_ip6_rht0, 0, &ip6_rht0, 0,
1909: CTL_NET, PF_INET6, IPPROTO_IPV6,
1910: CTL_CREATE, CTL_EOL);
1.2 itojun 1911: }
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