Annotation of src/sys/netinet6/ip6_input.c, Revision 1.86
1.86 ! rpaulo 1: /* $NetBSD: ip6_input.c,v 1.85 2006/05/05 00:03:22 rpaulo 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>
1.86 ! rpaulo 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.85 2006/05/05 00:03:22 rpaulo 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:
1.2 itojun 115: #include <netinet6/ip6protosw.h>
116:
117: #include "faith.h"
118: #include "gif.h"
1.50 itojun 119:
120: #if NGIF > 0
121: #include <netinet6/in6_gif.h>
122: #endif
1.2 itojun 123:
1.9 itojun 124: #include <net/net_osdep.h>
125:
1.2 itojun 126: extern struct domain inet6domain;
127:
128: u_char ip6_protox[IPPROTO_MAX];
129: static int ip6qmaxlen = IFQ_MAXLEN;
130: struct in6_ifaddr *in6_ifaddr;
131: struct ifqueue ip6intrq;
132:
1.83 rpaulo 133: extern struct callout in6_tmpaddrtimer_ch;
134:
1.2 itojun 135: int ip6_forward_srcrt; /* XXX */
136: int ip6_sourcecheck; /* XXX */
137: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 138:
1.29 thorpej 139: #ifdef PFIL_HOOKS
140: struct pfil_head inet6_pfil_hook;
141: #endif
142:
1.2 itojun 143: struct ip6stat ip6stat;
144:
145: static void ip6_init2 __P((void *));
1.81 rpaulo 146: static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *));
1.2 itojun 147:
1.5 itojun 148: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
1.62 itojun 149: static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));
1.2 itojun 150:
151: /*
152: * IP6 initialization: fill in IP6 protocol switch table.
153: * All protocols not implemented in kernel go to raw IP6 protocol handler.
154: */
155: void
156: ip6_init()
157: {
1.78 christos 158: const struct ip6protosw *pr;
1.35 itojun 159: int i;
1.2 itojun 160:
1.78 christos 161: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 162: if (pr == 0)
163: panic("ip6_init");
164: for (i = 0; i < IPPROTO_MAX; i++)
165: ip6_protox[i] = pr - inet6sw;
1.78 christos 166: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
167: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 168: if (pr->pr_domain->dom_family == PF_INET6 &&
169: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
170: ip6_protox[pr->pr_protocol] = pr - inet6sw;
171: ip6intrq.ifq_maxlen = ip6qmaxlen;
1.81 rpaulo 172: scope6_init();
173: addrsel_policy_init();
1.2 itojun 174: nd6_init();
175: frag6_init();
1.83 rpaulo 176: ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 177:
178: ip6_init2((void *)0);
1.29 thorpej 179:
180: #ifdef PFIL_HOOKS
181: /* Register our Packet Filter hook. */
1.33 thorpej 182: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
183: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 184: i = pfil_head_register(&inet6_pfil_hook);
185: if (i != 0)
186: printf("ip6_init: WARNING: unable to register pfil hook, "
187: "error %d\n", i);
188: #endif /* PFIL_HOOKS */
1.2 itojun 189: }
190:
191: static void
192: ip6_init2(dummy)
193: void *dummy;
194: {
195:
196: /* nd6_timer_init */
1.19 thorpej 197: callout_init(&nd6_timer_ch);
198: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83 rpaulo 199:
200: /* timer for regeneranation of temporary addresses randomize ID */
201: callout_init(&in6_tmpaddrtimer_ch);
202: callout_reset(&in6_tmpaddrtimer_ch,
203: (ip6_temp_preferred_lifetime - ip6_desync_factor -
204: ip6_temp_regen_advance) * hz,
205: in6_tmpaddrtimer, NULL);
1.2 itojun 206: }
207:
208: /*
209: * IP6 input interrupt handling. Just pass the packet to ip6_input.
210: */
211: void
212: ip6intr()
213: {
214: int s;
215: struct mbuf *m;
216:
217: for (;;) {
1.41 thorpej 218: s = splnet();
1.2 itojun 219: IF_DEQUEUE(&ip6intrq, m);
220: splx(s);
221: if (m == 0)
222: return;
1.83 rpaulo 223: /* drop the packet if IPv6 operation is disabled on the IF */
224: if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {
225: m_freem(m);
226: return;
227: }
1.2 itojun 228: ip6_input(m);
229: }
230: }
231:
232: extern struct route_in6 ip6_forward_rt;
233:
234: void
235: ip6_input(m)
236: struct mbuf *m;
237: {
1.9 itojun 238: struct ip6_hdr *ip6;
1.2 itojun 239: int off = sizeof(struct ip6_hdr), nest;
240: u_int32_t plen;
1.5 itojun 241: u_int32_t rtalert = ~0;
1.2 itojun 242: int nxt, ours = 0;
1.9 itojun 243: struct ifnet *deliverifp = NULL;
1.64 itojun 244: int srcrt = 0;
1.2 itojun 245:
246: #ifdef IPSEC
247: /*
248: * should the inner packet be considered authentic?
249: * see comment in ah4_input().
250: */
1.49 itojun 251: m->m_flags &= ~M_AUTHIPHDR;
252: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 253: #endif
1.9 itojun 254:
1.2 itojun 255: /*
1.81 rpaulo 256: * make sure we don't have onion peering information into m_tag.
257: */
258: ip6_delaux(m);
259:
260: /*
1.44 itojun 261: * mbuf statistics
1.2 itojun 262: */
263: if (m->m_flags & M_EXT) {
264: if (m->m_next)
265: ip6stat.ip6s_mext2m++;
266: else
267: ip6stat.ip6s_mext1++;
268: } else {
1.40 itojun 269: #define M2MMAX (sizeof(ip6stat.ip6s_m2m)/sizeof(ip6stat.ip6s_m2m[0]))
1.2 itojun 270: if (m->m_next) {
1.9 itojun 271: if (m->m_flags & M_LOOP) {
1.77 peter 272: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 273: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 274: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
275: else
276: ip6stat.ip6s_m2m[0]++;
277: } else
278: ip6stat.ip6s_m1++;
1.40 itojun 279: #undef M2MMAX
1.2 itojun 280: }
281:
1.9 itojun 282: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
283: ip6stat.ip6s_total++;
284:
1.57 thorpej 285: /*
286: * If the IPv6 header is not aligned, slurp it up into a new
287: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 288: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 289: * IPv6 header is in the first mbuf of the chain.
290: */
291: if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
292: struct ifnet *inifp = m->m_pkthdr.rcvif;
293: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
294: (max_linkhdr + 3) & ~3)) == NULL) {
295: /* XXXJRT new stat, please */
296: ip6stat.ip6s_toosmall++;
297: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
298: return;
299: }
300: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
301: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 302: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 303: ip6stat.ip6s_toosmall++;
304: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
305: return;
306: }
1.2 itojun 307: }
308:
309: ip6 = mtod(m, struct ip6_hdr *);
310:
311: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
312: ip6stat.ip6s_badvers++;
1.9 itojun 313: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 314: goto bad;
315: }
1.15 darrenr 316:
317: #ifdef PFIL_HOOKS
318: /*
319: * Run through list of hooks for input packets. If there are any
320: * filters which require that additional packets in the flow are
321: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
322: * Note that filters must _never_ set this flag, as another filter
323: * in the list may have previously cleared it.
324: */
1.39 itojun 325: /*
326: * let ipfilter look at packet on the wire,
327: * not the decapsulated packet.
328: */
329: #ifdef IPSEC
1.42 itojun 330: if (!ipsec_getnhist(m))
1.39 itojun 331: #else
332: if (1)
333: #endif
334: {
1.64 itojun 335: struct in6_addr odst;
336:
337: odst = ip6->ip6_dst;
1.39 itojun 338: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
339: PFIL_IN) != 0)
340: return;
341: if (m == NULL)
342: return;
343: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 344: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 345: }
1.15 darrenr 346: #endif /* PFIL_HOOKS */
347:
1.2 itojun 348: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
349:
1.30 thorpej 350: #ifdef ALTQ
351: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
352: /* packet is dropped by traffic conditioner */
353: return;
1.9 itojun 354: }
355: #endif
356:
1.2 itojun 357: /*
1.44 itojun 358: * Check against address spoofing/corruption.
1.2 itojun 359: */
360: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
361: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 362: /*
363: * XXX: "badscope" is not very suitable for a multicast source.
364: */
1.2 itojun 365: ip6stat.ip6s_badscope++;
1.9 itojun 366: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 367: goto bad;
368: }
1.13 itojun 369: /*
1.44 itojun 370: * The following check is not documented in specs. A malicious
371: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
372: * and bypass security checks (act as if it was from 127.0.0.1 by using
373: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 374: *
1.44 itojun 375: * This check chokes if we are in an SIIT cloud. As none of BSDs
376: * support IPv4-less kernel compilation, we cannot support SIIT
377: * environment at all. So, it makes more sense for us to reject any
378: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 379: * partial support for SIIT environment.
1.13 itojun 380: */
381: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
382: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
383: ip6stat.ip6s_badscope++;
384: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
385: goto bad;
386: }
1.17 itojun 387: #if 0
1.13 itojun 388: /*
1.17 itojun 389: * Reject packets with IPv4 compatible addresses (auto tunnel).
390: *
391: * The code forbids auto tunnel relay case in RFC1933 (the check is
392: * stronger than RFC1933). We may want to re-enable it if mech-xx
393: * is revised to forbid relaying case.
1.13 itojun 394: */
395: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
396: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
397: ip6stat.ip6s_badscope++;
398: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
399: goto bad;
400: }
401: #endif
1.35 itojun 402:
1.2 itojun 403: /*
1.82 yamt 404: * Disambiguate address scope zones (if there is ambiguity).
405: * We first make sure that the original source or destination address
406: * is not in our internal form for scoped addresses. Such addresses
407: * are not necessarily invalid spec-wise, but we cannot accept them due
408: * to the usage conflict.
409: * in6_setscope() then also checks and rejects the cases where src or
410: * dst are the loopback address and the receiving interface
411: * is not loopback.
412: */
413: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
414: ip6stat.ip6s_badscope++; /* XXX */
415: goto bad;
416: }
417: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
418: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
419: ip6stat.ip6s_badscope++;
420: goto bad;
421: }
422:
423: /*
1.2 itojun 424: * Multicast check
425: */
426: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
427: struct in6_multi *in6m = 0;
1.9 itojun 428:
429: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 430: /*
431: * See if we belong to the destination multicast group on the
432: * arrival interface.
433: */
434: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
435: if (in6m)
436: ours = 1;
437: else if (!ip6_mrouter) {
438: ip6stat.ip6s_notmember++;
439: ip6stat.ip6s_cantforward++;
1.9 itojun 440: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 441: goto bad;
442: }
1.9 itojun 443: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 444: goto hbhcheck;
445: }
446:
447: /*
448: * Unicast check
449: */
1.22 itojun 450: if (ip6_forward_rt.ro_rt != NULL &&
1.55 itojun 451: (ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 &&
1.22 itojun 452: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.72 itojun 453: &((struct sockaddr_in6 *)(&ip6_forward_rt.ro_dst))->sin6_addr))
1.25 itojun 454: ip6stat.ip6s_forward_cachehit++;
1.22 itojun 455: else {
1.35 itojun 456: struct sockaddr_in6 *dst6;
457:
1.2 itojun 458: if (ip6_forward_rt.ro_rt) {
1.22 itojun 459: /* route is down or destination is different */
1.25 itojun 460: ip6stat.ip6s_forward_cachemiss++;
1.2 itojun 461: RTFREE(ip6_forward_rt.ro_rt);
462: ip6_forward_rt.ro_rt = 0;
463: }
1.22 itojun 464:
1.2 itojun 465: bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6));
1.35 itojun 466: dst6 = (struct sockaddr_in6 *)&ip6_forward_rt.ro_dst;
467: dst6->sin6_len = sizeof(struct sockaddr_in6);
468: dst6->sin6_family = AF_INET6;
469: dst6->sin6_addr = ip6->ip6_dst;
1.2 itojun 470:
1.9 itojun 471: rtalloc((struct route *)&ip6_forward_rt);
1.2 itojun 472: }
473:
474: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
475:
476: /*
477: * Accept the packet if the forwarding interface to the destination
478: * according to the routing table is the loopback interface,
479: * unless the associated route has a gateway.
480: * Note that this approach causes to accept a packet if there is a
481: * route to the loopback interface for the destination of the packet.
482: * But we think it's even useful in some situations, e.g. when using
483: * a special daemon which wants to intercept the packet.
484: */
485: if (ip6_forward_rt.ro_rt &&
486: (ip6_forward_rt.ro_rt->rt_flags &
487: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55 itojun 488: !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2 itojun 489: #if 0
490: /*
491: * The check below is redundant since the comparison of
492: * the destination and the key of the rtentry has
493: * already done through looking up the routing table.
494: */
495: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55 itojun 496: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2 itojun 497: #endif
1.9 itojun 498: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 499: struct in6_ifaddr *ia6 =
500: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
501: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
502: m->m_flags |= M_ANYCAST6;
1.24 itojun 503: /*
504: * packets to a tentative, duplicated, or somehow invalid
505: * address must not be accepted.
506: */
1.2 itojun 507: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 508: /* this address is ready */
1.2 itojun 509: ours = 1;
1.9 itojun 510: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 511: goto hbhcheck;
512: } else {
1.24 itojun 513: /* address is not ready, so discard the packet. */
1.34 itojun 514: nd6log((LOG_INFO,
1.27 itojun 515: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 516: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 517: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 518:
519: goto bad;
1.2 itojun 520: }
521: }
522:
523: /*
1.55 itojun 524: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 525: */
526: #if defined(NFAITH) && 0 < NFAITH
527: if (ip6_keepfaith) {
1.71 itojun 528: if (ip6_forward_rt.ro_rt && ip6_forward_rt.ro_rt->rt_ifp &&
529: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 530: /* XXX do we need more sanity checks? */
531: ours = 1;
1.45 itojun 532: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 533: goto hbhcheck;
534: }
535: }
536: #endif
537:
538: #if 0
539: {
540: /*
541: * Last resort: check in6_ifaddr for incoming interface.
542: * The code is here until I update the "goto ours hack" code above
543: * working right.
544: */
545: struct ifaddr *ifa;
546: for (ifa = m->m_pkthdr.rcvif->if_addrlist.tqh_first;
547: ifa;
548: ifa = ifa->ifa_list.tqe_next) {
549: if (ifa->ifa_addr == NULL)
550: continue; /* just for safety */
551: if (ifa->ifa_addr->sa_family != AF_INET6)
552: continue;
553: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
554: ours = 1;
555: deliverifp = ifa->ifa_ifp;
1.2 itojun 556: goto hbhcheck;
557: }
558: }
1.9 itojun 559: }
1.2 itojun 560: #endif
561:
562: /*
563: * Now there is no reason to process the packet if it's not our own
564: * and we're not a router.
565: */
566: if (!ip6_forwarding) {
567: ip6stat.ip6s_cantforward++;
1.9 itojun 568: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 569: goto bad;
570: }
571:
572: hbhcheck:
573: /*
1.81 rpaulo 574: * record address information into m_tag, if we don't have one yet.
575: * note that we are unable to record it, if the address is not listed
576: * as our interface address (e.g. multicast addresses, addresses
577: * within FAITH prefixes and such).
578: */
579: if (deliverifp && !ip6_getdstifaddr(m)) {
580: struct in6_ifaddr *ia6;
581:
582: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
583: if (ia6) {
584: if (!ip6_setdstifaddr(m, ia6)) {
585: /*
586: * XXX maybe we should drop the packet here,
587: * as we could not provide enough information
588: * to the upper layers.
589: */
590: }
591: }
592: }
593:
594: /*
1.2 itojun 595: * Process Hop-by-Hop options header if it's contained.
596: * m may be modified in ip6_hopopts_input().
597: * If a JumboPayload option is included, plen will also be modified.
598: */
599: plen = (u_int32_t)ntohs(ip6->ip6_plen);
600: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 601: struct ip6_hbh *hbh;
602:
603: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
604: #if 0 /*touches NULL pointer*/
605: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
606: #endif
1.2 itojun 607: return; /* m have already been freed */
1.9 itojun 608: }
1.22 itojun 609:
1.2 itojun 610: /* adjust pointer */
611: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 612:
613: /*
1.49 itojun 614: * if the payload length field is 0 and the next header field
1.22 itojun 615: * indicates Hop-by-Hop Options header, then a Jumbo Payload
616: * option MUST be included.
617: */
618: if (ip6->ip6_plen == 0 && plen == 0) {
619: /*
620: * Note that if a valid jumbo payload option is
1.83 rpaulo 621: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 622: * (non-zero) payload length to the variable plen.
1.22 itojun 623: */
624: ip6stat.ip6s_badoptions++;
625: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
626: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
627: icmp6_error(m, ICMP6_PARAM_PROB,
628: ICMP6_PARAMPROB_HEADER,
629: (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
630: return;
631: }
1.9 itojun 632: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
633: sizeof(struct ip6_hbh));
634: if (hbh == NULL) {
635: ip6stat.ip6s_tooshort++;
636: return;
637: }
1.57 thorpej 638: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 639: nxt = hbh->ip6h_nxt;
1.2 itojun 640:
641: /*
642: * accept the packet if a router alert option is included
643: * and we act as an IPv6 router.
644: */
1.5 itojun 645: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 646: ours = 1;
647: } else
648: nxt = ip6->ip6_nxt;
649:
650: /*
651: * Check that the amount of data in the buffers
652: * is as at least much as the IPv6 header would have us expect.
653: * Trim mbufs if longer than we expect.
654: * Drop packet if shorter than we expect.
655: */
656: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
657: ip6stat.ip6s_tooshort++;
1.9 itojun 658: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 659: goto bad;
660: }
661: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
662: if (m->m_len == m->m_pkthdr.len) {
663: m->m_len = sizeof(struct ip6_hdr) + plen;
664: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
665: } else
666: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
667: }
668:
669: /*
670: * Forward if desirable.
671: */
672: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
673: /*
674: * If we are acting as a multicast router, all
675: * incoming multicast packets are passed to the
676: * kernel-level multicast forwarding function.
677: * The packet is returned (relatively) intact; if
678: * ip6_mforward() returns a non-zero value, the packet
679: * must be discarded, else it may be accepted below.
680: */
681: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
682: ip6stat.ip6s_cantforward++;
683: m_freem(m);
684: return;
685: }
686: if (!ours) {
687: m_freem(m);
688: return;
689: }
1.22 itojun 690: } else if (!ours) {
1.64 itojun 691: ip6_forward(m, srcrt);
1.2 itojun 692: return;
1.56 itojun 693: }
1.25 itojun 694:
695: ip6 = mtod(m, struct ip6_hdr *);
696:
697: /*
698: * Malicious party may be able to use IPv4 mapped addr to confuse
699: * tcp/udp stack and bypass security checks (act as if it was from
700: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
701: *
702: * For SIIT end node behavior, you may want to disable the check.
703: * However, you will become vulnerable to attacks using IPv4 mapped
704: * source.
705: */
706: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
707: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
708: ip6stat.ip6s_badscope++;
709: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
710: goto bad;
711: }
1.2 itojun 712:
713: /*
714: * Tell launch routine the next header
715: */
1.12 itojun 716: #ifdef IFA_STATS
1.28 itojun 717: if (deliverifp != NULL) {
1.9 itojun 718: struct in6_ifaddr *ia6;
719: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
720: if (ia6)
721: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
722: }
723: #endif
1.2 itojun 724: ip6stat.ip6s_delivered++;
1.9 itojun 725: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 726: nest = 0;
1.40 itojun 727:
1.2 itojun 728: while (nxt != IPPROTO_DONE) {
729: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
730: ip6stat.ip6s_toomanyhdr++;
731: goto bad;
732: }
1.8 itojun 733:
734: /*
735: * protection against faulty packet - there should be
736: * more sanity checks in header chain processing.
737: */
738: if (m->m_pkthdr.len < off) {
739: ip6stat.ip6s_tooshort++;
1.9 itojun 740: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 741: goto bad;
742: }
743:
1.37 itojun 744: #ifdef IPSEC
745: /*
746: * enforce IPsec policy checking if we are seeing last header.
747: * note that we do not visit this with protocols with pcb layer
748: * code - like udp/tcp/raw ip.
749: */
750: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
751: ipsec6_in_reject(m, NULL)) {
752: ipsec6stat.in_polvio++;
753: goto bad;
754: }
755: #endif
1.56 itojun 756:
1.2 itojun 757: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
758: }
759: return;
760: bad:
761: m_freem(m);
762: }
763:
764: /*
1.81 rpaulo 765: * set/grab in6_ifaddr correspond to IPv6 destination address.
766: */
767: static struct m_tag *
768: ip6_setdstifaddr(m, ia6)
769: struct mbuf *m;
770: struct in6_ifaddr *ia6;
771: {
772: struct m_tag *mtag;
773:
774: mtag = ip6_addaux(m);
775: if (mtag)
776: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
777: return mtag; /* NULL if failed to set */
778: }
779:
780: struct in6_ifaddr *
781: ip6_getdstifaddr(m)
782: struct mbuf *m;
783: {
784: struct m_tag *mtag;
785:
786: mtag = ip6_findaux(m);
787: if (mtag)
788: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
789: else
790: return NULL;
791: }
792:
793: /*
1.2 itojun 794: * Hop-by-Hop options header processing. If a valid jumbo payload option is
795: * included, the real payload length will be stored in plenp.
796: */
797: static int
798: ip6_hopopts_input(plenp, rtalertp, mp, offp)
799: u_int32_t *plenp;
1.5 itojun 800: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 801: struct mbuf **mp;
802: int *offp;
803: {
1.35 itojun 804: struct mbuf *m = *mp;
1.2 itojun 805: int off = *offp, hbhlen;
806: struct ip6_hbh *hbh;
807:
808: /* validation of the length of the header */
1.9 itojun 809: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
810: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
811: if (hbh == NULL) {
812: ip6stat.ip6s_tooshort++;
813: return -1;
814: }
815: hbhlen = (hbh->ip6h_len + 1) << 3;
816: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
817: hbhlen);
818: if (hbh == NULL) {
819: ip6stat.ip6s_tooshort++;
820: return -1;
821: }
1.57 thorpej 822: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 823: off += hbhlen;
824: hbhlen -= sizeof(struct ip6_hbh);
825:
826: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
827: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 828: return (-1);
1.2 itojun 829:
830: *offp = off;
831: *mp = m;
1.58 itojun 832: return (0);
1.2 itojun 833: }
834:
835: /*
836: * Search header for all Hop-by-hop options and process each option.
837: * This function is separate from ip6_hopopts_input() in order to
838: * handle a case where the sending node itself process its hop-by-hop
839: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 840: *
841: * The function assumes that hbh header is located right after the IPv6 header
842: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
843: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 844: */
845: int
846: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
847: struct mbuf *m;
848: u_int8_t *opthead;
849: int hbhlen;
1.5 itojun 850: u_int32_t *rtalertp;
1.2 itojun 851: u_int32_t *plenp;
852: {
853: struct ip6_hdr *ip6;
854: int optlen = 0;
855: u_int8_t *opt = opthead;
856: u_int16_t rtalert_val;
1.22 itojun 857: u_int32_t jumboplen;
1.55 itojun 858: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 859:
860: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 861: switch (*opt) {
862: case IP6OPT_PAD1:
863: optlen = 1;
864: break;
865: case IP6OPT_PADN:
866: if (hbhlen < IP6OPT_MINLEN) {
867: ip6stat.ip6s_toosmall++;
868: goto bad;
869: }
870: optlen = *(opt + 1) + 2;
871: break;
872: case IP6OPT_RTALERT:
873: /* XXX may need check for alignment */
874: if (hbhlen < IP6OPT_RTALERT_LEN) {
875: ip6stat.ip6s_toosmall++;
876: goto bad;
877: }
878: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 879: /* XXX stat */
880: icmp6_error(m, ICMP6_PARAM_PROB,
881: ICMP6_PARAMPROB_HEADER,
882: erroff + opt + 1 - opthead);
883: return (-1);
1.35 itojun 884: }
885: optlen = IP6OPT_RTALERT_LEN;
886: bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
887: *rtalertp = ntohs(rtalert_val);
888: break;
889: case IP6OPT_JUMBO:
1.22 itojun 890: /* XXX may need check for alignment */
891: if (hbhlen < IP6OPT_JUMBO_LEN) {
892: ip6stat.ip6s_toosmall++;
893: goto bad;
894: }
1.35 itojun 895: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 896: /* XXX stat */
897: icmp6_error(m, ICMP6_PARAM_PROB,
898: ICMP6_PARAMPROB_HEADER,
899: erroff + opt + 1 - opthead);
900: return (-1);
1.35 itojun 901: }
1.22 itojun 902: optlen = IP6OPT_JUMBO_LEN;
903:
904: /*
905: * IPv6 packets that have non 0 payload length
1.35 itojun 906: * must not contain a jumbo payload option.
1.22 itojun 907: */
908: ip6 = mtod(m, struct ip6_hdr *);
909: if (ip6->ip6_plen) {
910: ip6stat.ip6s_badoptions++;
911: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 912: ICMP6_PARAMPROB_HEADER,
913: erroff + opt - opthead);
914: return (-1);
1.22 itojun 915: }
1.2 itojun 916:
1.22 itojun 917: /*
918: * We may see jumbolen in unaligned location, so
919: * we'd need to perform bcopy().
920: */
921: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
922: jumboplen = (u_int32_t)htonl(jumboplen);
923:
924: #if 1
925: /*
926: * if there are multiple jumbo payload options,
927: * *plenp will be non-zero and the packet will be
928: * rejected.
929: * the behavior may need some debate in ipngwg -
930: * multiple options does not make sense, however,
931: * there's no explicit mention in specification.
932: */
933: if (*plenp != 0) {
934: ip6stat.ip6s_badoptions++;
935: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 936: ICMP6_PARAMPROB_HEADER,
937: erroff + opt + 2 - opthead);
938: return (-1);
1.22 itojun 939: }
1.8 itojun 940: #endif
1.2 itojun 941:
1.22 itojun 942: /*
943: * jumbo payload length must be larger than 65535.
944: */
945: if (jumboplen <= IPV6_MAXPACKET) {
946: ip6stat.ip6s_badoptions++;
947: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 948: ICMP6_PARAMPROB_HEADER,
949: erroff + opt + 2 - opthead);
950: return (-1);
1.22 itojun 951: }
952: *plenp = jumboplen;
953:
954: break;
1.35 itojun 955: default: /* unknown option */
956: if (hbhlen < IP6OPT_MINLEN) {
957: ip6stat.ip6s_toosmall++;
958: goto bad;
959: }
1.55 itojun 960: optlen = ip6_unknown_opt(opt, m,
961: erroff + opt - opthead);
962: if (optlen == -1)
963: return (-1);
1.35 itojun 964: optlen += 2;
965: break;
1.2 itojun 966: }
967: }
968:
1.55 itojun 969: return (0);
1.2 itojun 970:
971: bad:
972: m_freem(m);
1.55 itojun 973: return (-1);
1.2 itojun 974: }
975:
976: /*
977: * Unknown option processing.
978: * The third argument `off' is the offset from the IPv6 header to the option,
979: * which is necessary if the IPv6 header the and option header and IPv6 header
980: * is not continuous in order to return an ICMPv6 error.
981: */
982: int
983: ip6_unknown_opt(optp, m, off)
984: u_int8_t *optp;
985: struct mbuf *m;
986: int off;
987: {
988: struct ip6_hdr *ip6;
989:
1.35 itojun 990: switch (IP6OPT_TYPE(*optp)) {
991: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 992: return ((int)*(optp + 1));
1.35 itojun 993: case IP6OPT_TYPE_DISCARD: /* silently discard */
994: m_freem(m);
1.58 itojun 995: return (-1);
1.35 itojun 996: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
997: ip6stat.ip6s_badoptions++;
998: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 999: return (-1);
1.35 itojun 1000: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1001: ip6stat.ip6s_badoptions++;
1002: ip6 = mtod(m, struct ip6_hdr *);
1003: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1004: (m->m_flags & (M_BCAST|M_MCAST)))
1005: m_freem(m);
1006: else
1007: icmp6_error(m, ICMP6_PARAM_PROB,
1008: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1009: return (-1);
1.2 itojun 1010: }
1011:
1012: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1013: return (-1);
1.2 itojun 1014: }
1015:
1016: /*
1.9 itojun 1017: * Create the "control" list for this pcb.
1018: *
1019: * The routine will be called from upper layer handlers like tcp6_input().
1020: * Thus the routine assumes that the caller (tcp6_input) have already
1021: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1022: * very first mbuf on the mbuf chain.
1023: * We may want to add some infinite loop prevention or sanity checks for safety.
1024: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1025: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1026: */
1027: void
1028: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 1029: struct in6pcb *in6p;
1030: struct mbuf **mp;
1031: struct ip6_hdr *ip6;
1032: struct mbuf *m;
1.2 itojun 1033: {
1.85 rpaulo 1034: #ifdef RFC2292
1035: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1036: #else
1037: #define IS2292(x, y) (y)
1038: #endif
1039:
1.9 itojun 1040: #ifdef SO_TIMESTAMP
1.2 itojun 1041: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1042: struct timeval tv;
1043:
1044: microtime(&tv);
1045: *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
1.63 itojun 1046: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1047: if (*mp)
1048: mp = &(*mp)->m_next;
1049: }
1.9 itojun 1050: #endif
1.2 itojun 1051: /* RFC 2292 sec. 5 */
1.35 itojun 1052: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1053: struct in6_pktinfo pi6;
1.85 rpaulo 1054:
1.2 itojun 1055: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1056: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1057: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1058: m->m_pkthdr.rcvif->if_index : 0;
1.2 itojun 1059: *mp = sbcreatecontrol((caddr_t) &pi6,
1.85 rpaulo 1060: sizeof(struct in6_pktinfo),
1061: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1062: if (*mp)
1063: mp = &(*mp)->m_next;
1064: }
1.85 rpaulo 1065:
1.2 itojun 1066: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1067: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1068:
1.63 itojun 1069: *mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),
1.85 rpaulo 1070: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1071: if (*mp)
1072: mp = &(*mp)->m_next;
1073: }
1074:
1075: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1076: u_int32_t flowinfo;
1077: int tclass;
1078:
1079: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1080: flowinfo >>= 20;
1081:
1082: tclass = flowinfo & 0xff;
1083: *mp = sbcreatecontrol((caddr_t)&tclass, sizeof(tclass),
1084: IPV6_TCLASS, IPPROTO_IPV6);
1085:
1.2 itojun 1086: if (*mp)
1087: mp = &(*mp)->m_next;
1088: }
1089:
1090: /*
1.75 itojun 1091: * IPV6_HOPOPTS socket option. Recall that we required super-user
1092: * privilege for the option (see ip6_ctloutput), but it might be too
1093: * strict, since there might be some hop-by-hop options which can be
1094: * returned to normal user.
1.85 rpaulo 1095: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1096: */
1.75 itojun 1097: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1098: /*
1099: * Check if a hop-by-hop options header is contatined in the
1100: * received packet, and if so, store the options as ancillary
1101: * data. Note that a hop-by-hop options header must be
1102: * just after the IPv6 header, which fact is assured through
1103: * the IPv6 input processing.
1104: */
1.78 christos 1105: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1106: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1107: struct ip6_hbh *hbh;
1108: int hbhlen;
1.62 itojun 1109: struct mbuf *ext;
1.9 itojun 1110:
1.62 itojun 1111: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1112: xip6->ip6_nxt);
1.62 itojun 1113: if (ext == NULL) {
1.9 itojun 1114: ip6stat.ip6s_tooshort++;
1115: return;
1116: }
1.62 itojun 1117: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1118: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1119: if (hbhlen != ext->m_len) {
1120: m_freem(ext);
1.9 itojun 1121: ip6stat.ip6s_tooshort++;
1122: return;
1123: }
1.2 itojun 1124:
1125: /*
1126: * XXX: We copy whole the header even if a jumbo
1127: * payload option is included, which option is to
1128: * be removed before returning in the RFC 2292.
1.85 rpaulo 1129: * Note: this constraint is removed in RFC3542.
1.2 itojun 1130: */
1.9 itojun 1131: *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
1.85 rpaulo 1132: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1133: IPPROTO_IPV6);
1.2 itojun 1134: if (*mp)
1135: mp = &(*mp)->m_next;
1.62 itojun 1136: m_freem(ext);
1.2 itojun 1137: }
1138: }
1139:
1140: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1141: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1142: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1143: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1144:
1145: /*
1146: * Search for destination options headers or routing
1147: * header(s) through the header chain, and stores each
1148: * header as ancillary data.
1149: * Note that the order of the headers remains in
1150: * the chain of ancillary data.
1151: */
1.86 ! rpaulo 1152: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1153: struct ip6_ext *ip6e = NULL;
1.9 itojun 1154: int elen;
1.62 itojun 1155: struct mbuf *ext = NULL;
1.9 itojun 1156:
1.62 itojun 1157: /*
1158: * if it is not an extension header, don't try to
1159: * pull it from the chain.
1160: */
1161: switch (nxt) {
1162: case IPPROTO_DSTOPTS:
1163: case IPPROTO_ROUTING:
1164: case IPPROTO_HOPOPTS:
1165: case IPPROTO_AH: /* is it possible? */
1166: break;
1167: default:
1168: goto loopend;
1169: }
1170:
1171: ext = ip6_pullexthdr(m, off, nxt);
1172: if (ext == NULL) {
1.9 itojun 1173: ip6stat.ip6s_tooshort++;
1174: return;
1175: }
1.62 itojun 1176: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1177: if (nxt == IPPROTO_AH)
1178: elen = (ip6e->ip6e_len + 2) << 2;
1179: else
1180: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1181: if (elen != ext->m_len) {
1182: m_freem(ext);
1.9 itojun 1183: ip6stat.ip6s_tooshort++;
1184: return;
1185: }
1.57 thorpej 1186: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1187:
1.35 itojun 1188: switch (nxt) {
1.62 itojun 1189: case IPPROTO_DSTOPTS:
1.35 itojun 1190: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1191: break;
1192:
1193: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.85 rpaulo 1194: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1195: IPPROTO_IPV6);
1.35 itojun 1196: if (*mp)
1197: mp = &(*mp)->m_next;
1198: break;
1199:
1200: case IPPROTO_ROUTING:
1201: if (!in6p->in6p_flags & IN6P_RTHDR)
1202: break;
1203:
1204: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.85 rpaulo 1205: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1206: IPPROTO_IPV6);
1.35 itojun 1207: if (*mp)
1208: mp = &(*mp)->m_next;
1209: break;
1210:
1.62 itojun 1211: case IPPROTO_HOPOPTS:
1212: case IPPROTO_AH: /* is it possible? */
1213: break;
1214:
1.35 itojun 1215: default:
1216: /*
1.62 itojun 1217: * other cases have been filtered in the above.
1218: * none will visit this case. here we supply
1219: * the code just in case (nxt overwritten or
1220: * other cases).
1.35 itojun 1221: */
1.62 itojun 1222: m_freem(ext);
1.35 itojun 1223: goto loopend;
1224:
1.2 itojun 1225: }
1226:
1227: /* proceed with the next header. */
1.9 itojun 1228: off += elen;
1.2 itojun 1229: nxt = ip6e->ip6e_nxt;
1.62 itojun 1230: ip6e = NULL;
1231: m_freem(ext);
1232: ext = NULL;
1.2 itojun 1233: }
1234: loopend:
1.62 itojun 1235: ;
1.2 itojun 1236: }
1.62 itojun 1237: }
1.85 rpaulo 1238: #undef IS2292
1239:
1240:
1241: void
1242: ip6_notify_pmtu(struct in6pcb *in6p, struct sockaddr_in6 *dst, uint32_t *mtu)
1243: {
1244: struct socket *so;
1245: struct mbuf *m_mtu;
1246: struct ip6_mtuinfo mtuctl;
1247:
1248: so = in6p->in6p_socket;
1249:
1250: if (mtu == NULL)
1251: return;
1252:
1253: #ifdef DIAGNOSTIC
1254: if (so == NULL) /* I believe this is impossible */
1255: panic("ip6_notify_pmtu: socket is NULL");
1256: #endif
1257:
1258: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1259: mtuctl.ip6m_mtu = *mtu;
1260: mtuctl.ip6m_addr = *dst;
1261: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1262: return;
1263:
1264: if ((m_mtu = sbcreatecontrol((caddr_t)&mtuctl, sizeof(mtuctl),
1265: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1266: return;
1267:
1268: if (sbappendaddr(&so->so_rcv, (struct sockaddr *)dst, NULL, m_mtu)
1269: == 0) {
1270: m_freem(m_mtu);
1271: /* XXX: should count statistics */
1272: } else
1273: sorwakeup(so);
1274:
1275: return;
1276: }
1.62 itojun 1277:
1278: /*
1279: * pull single extension header from mbuf chain. returns single mbuf that
1280: * contains the result, or NULL on error.
1281: */
1282: static struct mbuf *
1283: ip6_pullexthdr(m, off, nxt)
1284: struct mbuf *m;
1285: size_t off;
1286: int nxt;
1287: {
1288: struct ip6_ext ip6e;
1289: size_t elen;
1290: struct mbuf *n;
1291:
1292: #ifdef DIAGNOSTIC
1293: switch (nxt) {
1294: case IPPROTO_DSTOPTS:
1295: case IPPROTO_ROUTING:
1296: case IPPROTO_HOPOPTS:
1297: case IPPROTO_AH: /* is it possible? */
1298: break;
1299: default:
1300: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1301: }
1.62 itojun 1302: #endif
1.2 itojun 1303:
1.62 itojun 1304: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1305: if (nxt == IPPROTO_AH)
1306: elen = (ip6e.ip6e_len + 2) << 2;
1307: else
1308: elen = (ip6e.ip6e_len + 1) << 3;
1309:
1310: MGET(n, M_DONTWAIT, MT_DATA);
1311: if (n && elen >= MLEN) {
1312: MCLGET(n, M_DONTWAIT);
1313: if ((n->m_flags & M_EXT) == 0) {
1314: m_free(n);
1315: n = NULL;
1316: }
1317: }
1318: if (!n)
1319: return NULL;
1320:
1321: n->m_len = 0;
1322: if (elen >= M_TRAILINGSPACE(n)) {
1323: m_free(n);
1324: return NULL;
1325: }
1326:
1327: m_copydata(m, off, elen, mtod(n, caddr_t));
1328: n->m_len = elen;
1329: return n;
1.2 itojun 1330: }
1331:
1332: /*
1333: * Get pointer to the previous header followed by the header
1334: * currently processed.
1335: * XXX: This function supposes that
1336: * M includes all headers,
1337: * the next header field and the header length field of each header
1338: * are valid, and
1339: * the sum of each header length equals to OFF.
1340: * Because of these assumptions, this function must be called very
1341: * carefully. Moreover, it will not be used in the near future when
1342: * we develop `neater' mechanism to process extension headers.
1343: */
1.58 itojun 1344: u_int8_t *
1.2 itojun 1345: ip6_get_prevhdr(m, off)
1346: struct mbuf *m;
1347: int off;
1348: {
1349: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1350:
1351: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1352: return (&ip6->ip6_nxt);
1.2 itojun 1353: else {
1354: int len, nxt;
1355: struct ip6_ext *ip6e = NULL;
1356:
1357: nxt = ip6->ip6_nxt;
1358: len = sizeof(struct ip6_hdr);
1359: while (len < off) {
1360: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
1361:
1.35 itojun 1362: switch (nxt) {
1.2 itojun 1363: case IPPROTO_FRAGMENT:
1364: len += sizeof(struct ip6_frag);
1365: break;
1366: case IPPROTO_AH:
1367: len += (ip6e->ip6e_len + 2) << 2;
1368: break;
1369: default:
1370: len += (ip6e->ip6e_len + 1) << 3;
1371: break;
1372: }
1373: nxt = ip6e->ip6e_nxt;
1374: }
1375: if (ip6e)
1.58 itojun 1376: return (&ip6e->ip6e_nxt);
1.2 itojun 1377: else
1378: return NULL;
1.18 itojun 1379: }
1380: }
1381:
1382: /*
1383: * get next header offset. m will be retained.
1384: */
1385: int
1386: ip6_nexthdr(m, off, proto, nxtp)
1387: struct mbuf *m;
1388: int off;
1389: int proto;
1390: int *nxtp;
1391: {
1392: struct ip6_hdr ip6;
1393: struct ip6_ext ip6e;
1394: struct ip6_frag fh;
1395:
1396: /* just in case */
1397: if (m == NULL)
1398: panic("ip6_nexthdr: m == NULL");
1399: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1400: return -1;
1401:
1402: switch (proto) {
1403: case IPPROTO_IPV6:
1.83 rpaulo 1404: /* do not chase beyond intermediate IPv6 headers */
1405: if (off != 0)
1406: return -1;
1.18 itojun 1407: if (m->m_pkthdr.len < off + sizeof(ip6))
1408: return -1;
1409: m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
1410: if (nxtp)
1411: *nxtp = ip6.ip6_nxt;
1412: off += sizeof(ip6);
1413: return off;
1414:
1415: case IPPROTO_FRAGMENT:
1416: /*
1417: * terminate parsing if it is not the first fragment,
1418: * it does not make sense to parse through it.
1419: */
1420: if (m->m_pkthdr.len < off + sizeof(fh))
1421: return -1;
1422: m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
1.67 itojun 1423: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1424: return -1;
1425: if (nxtp)
1426: *nxtp = fh.ip6f_nxt;
1427: off += sizeof(struct ip6_frag);
1428: return off;
1429:
1430: case IPPROTO_AH:
1431: if (m->m_pkthdr.len < off + sizeof(ip6e))
1432: return -1;
1433: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1434: if (nxtp)
1435: *nxtp = ip6e.ip6e_nxt;
1436: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1437: if (m->m_pkthdr.len < off)
1438: return -1;
1.18 itojun 1439: return off;
1440:
1441: case IPPROTO_HOPOPTS:
1442: case IPPROTO_ROUTING:
1443: case IPPROTO_DSTOPTS:
1444: if (m->m_pkthdr.len < off + sizeof(ip6e))
1445: return -1;
1446: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1447: if (nxtp)
1448: *nxtp = ip6e.ip6e_nxt;
1449: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1450: if (m->m_pkthdr.len < off)
1451: return -1;
1.18 itojun 1452: return off;
1453:
1454: case IPPROTO_NONE:
1455: case IPPROTO_ESP:
1456: case IPPROTO_IPCOMP:
1457: /* give up */
1458: return -1;
1459:
1460: default:
1461: return -1;
1462: }
1463: }
1464:
1465: /*
1466: * get offset for the last header in the chain. m will be kept untainted.
1467: */
1468: int
1469: ip6_lasthdr(m, off, proto, nxtp)
1470: struct mbuf *m;
1471: int off;
1472: int proto;
1473: int *nxtp;
1474: {
1475: int newoff;
1476: int nxt;
1477:
1478: if (!nxtp) {
1479: nxt = -1;
1480: nxtp = &nxt;
1481: }
1.86 ! rpaulo 1482: for (;;) {
1.18 itojun 1483: newoff = ip6_nexthdr(m, off, proto, nxtp);
1484: if (newoff < 0)
1485: return off;
1486: else if (newoff < off)
1487: return -1; /* invalid */
1488: else if (newoff == off)
1489: return newoff;
1490:
1491: off = newoff;
1492: proto = *nxtp;
1.2 itojun 1493: }
1494: }
1495:
1.81 rpaulo 1496: struct m_tag *
1497: ip6_addaux(m)
1498: struct mbuf *m;
1499: {
1500: struct m_tag *mtag;
1501:
1502: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1503: if (!mtag) {
1504: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1505: M_NOWAIT);
1506: if (mtag) {
1507: m_tag_prepend(m, mtag);
1508: bzero(mtag + 1, sizeof(struct ip6aux));
1509: }
1510: }
1511: return mtag;
1512: }
1513:
1514: struct m_tag *
1515: ip6_findaux(m)
1516: struct mbuf *m;
1517: {
1518: struct m_tag *mtag;
1519:
1520: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1521: return mtag;
1522: }
1523:
1524: void
1525: ip6_delaux(m)
1526: struct mbuf *m;
1527: {
1528: struct m_tag *mtag;
1529:
1530: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1531: if (mtag)
1532: m_tag_delete(m, mtag);
1533: }
1534:
1.2 itojun 1535: /*
1536: * System control for IP6
1537: */
1538:
1539: u_char inet6ctlerrmap[PRC_NCMDS] = {
1540: 0, 0, 0, 0,
1541: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1542: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1543: EMSGSIZE, EHOSTUNREACH, 0, 0,
1544: 0, 0, 0, 0,
1545: ENOPROTOOPT
1546: };
1547:
1.70 atatat 1548: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1549: {
1.85 rpaulo 1550: #ifdef RFC2292
1551: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1552: #else
1553: #define IS2292(x, y) (y)
1554: #endif
1.26 itojun 1555:
1.73 atatat 1556: sysctl_createv(clog, 0, NULL, NULL,
1557: CTLFLAG_PERMANENT,
1.70 atatat 1558: CTLTYPE_NODE, "net", NULL,
1559: NULL, 0, NULL, 0,
1560: CTL_NET, CTL_EOL);
1.73 atatat 1561: sysctl_createv(clog, 0, NULL, NULL,
1562: CTLFLAG_PERMANENT,
1.74 atatat 1563: CTLTYPE_NODE, "inet6",
1564: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1565: NULL, 0, NULL, 0,
1566: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1567: sysctl_createv(clog, 0, NULL, NULL,
1568: CTLFLAG_PERMANENT,
1.74 atatat 1569: CTLTYPE_NODE, "ip6",
1570: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1571: NULL, 0, NULL, 0,
1572: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1573:
1.73 atatat 1574: sysctl_createv(clog, 0, NULL, NULL,
1575: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1576: CTLTYPE_INT, "forwarding",
1577: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1578: NULL, 0, &ip6_forwarding, 0,
1579: CTL_NET, PF_INET6, IPPROTO_IPV6,
1580: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1581: sysctl_createv(clog, 0, NULL, NULL,
1582: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1583: CTLTYPE_INT, "redirect",
1584: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1585: NULL, 0, &ip6_sendredirects, 0,
1586: CTL_NET, PF_INET6, IPPROTO_IPV6,
1587: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1588: sysctl_createv(clog, 0, NULL, NULL,
1589: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1590: CTLTYPE_INT, "hlim",
1591: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1592: NULL, 0, &ip6_defhlim, 0,
1593: CTL_NET, PF_INET6, IPPROTO_IPV6,
1594: IPV6CTL_DEFHLIM, CTL_EOL);
1595: #ifdef notyet
1.73 atatat 1596: sysctl_createv(clog, 0, NULL, NULL,
1597: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1598: CTLTYPE_INT, "mtu", NULL,
1599: NULL, 0, &, 0,
1600: CTL_NET, PF_INET6, IPPROTO_IPV6,
1601: IPV6CTL_DEFMTU, CTL_EOL);
1602: #endif
1603: #ifdef __no_idea__
1.73 atatat 1604: sysctl_createv(clog, 0, NULL, NULL,
1605: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1606: CTLTYPE_INT, "forwsrcrt", NULL,
1607: NULL, 0, &?, 0,
1608: CTL_NET, PF_INET6, IPPROTO_IPV6,
1609: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1610: sysctl_createv(clog, 0, NULL, NULL,
1611: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1612: CTLTYPE_STRUCT, "mrtstats", NULL,
1613: NULL, 0, &?, sizeof(?),
1614: CTL_NET, PF_INET6, IPPROTO_IPV6,
1615: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1616: sysctl_createv(clog, 0, NULL, NULL,
1617: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1618: CTLTYPE_?, "mrtproto", NULL,
1619: NULL, 0, &?, sizeof(?),
1620: CTL_NET, PF_INET6, IPPROTO_IPV6,
1621: IPV6CTL_MRTPROTO, CTL_EOL);
1622: #endif
1.73 atatat 1623: sysctl_createv(clog, 0, NULL, NULL,
1624: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1625: CTLTYPE_INT, "maxfragpackets",
1626: SYSCTL_DESCR("Maximum number of fragments to buffer "
1627: "for reassembly"),
1.70 atatat 1628: NULL, 0, &ip6_maxfragpackets, 0,
1629: CTL_NET, PF_INET6, IPPROTO_IPV6,
1630: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1631: #ifdef __no_idea__
1.73 atatat 1632: sysctl_createv(clog, 0, NULL, NULL,
1633: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1634: CTLTYPE_INT, "sourcecheck", NULL,
1635: NULL, 0, &?, 0,
1636: CTL_NET, PF_INET6, IPPROTO_IPV6,
1637: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1638: sysctl_createv(clog, 0, NULL, NULL,
1639: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1640: CTLTYPE_INT, "sourcecheck_logint", NULL,
1641: NULL, 0, &?, 0,
1642: CTL_NET, PF_INET6, IPPROTO_IPV6,
1643: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1644: #endif
1.73 atatat 1645: sysctl_createv(clog, 0, NULL, NULL,
1646: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1647: CTLTYPE_INT, "accept_rtadv",
1648: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1649: NULL, 0, &ip6_accept_rtadv, 0,
1650: CTL_NET, PF_INET6, IPPROTO_IPV6,
1651: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1652: sysctl_createv(clog, 0, NULL, NULL,
1653: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1654: CTLTYPE_INT, "keepfaith",
1655: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1656: NULL, 0, &ip6_keepfaith, 0,
1657: CTL_NET, PF_INET6, IPPROTO_IPV6,
1658: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1659: sysctl_createv(clog, 0, NULL, NULL,
1660: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1661: CTLTYPE_INT, "log_interval",
1662: SYSCTL_DESCR("Minumum interval between logging "
1663: "unroutable packets"),
1.70 atatat 1664: NULL, 0, &ip6_log_interval, 0,
1665: CTL_NET, PF_INET6, IPPROTO_IPV6,
1666: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1667: sysctl_createv(clog, 0, NULL, NULL,
1668: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1669: CTLTYPE_INT, "hdrnestlimit",
1670: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1671: NULL, 0, &ip6_hdrnestlimit, 0,
1672: CTL_NET, PF_INET6, IPPROTO_IPV6,
1673: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1674: sysctl_createv(clog, 0, NULL, NULL,
1675: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1676: CTLTYPE_INT, "dad_count",
1677: SYSCTL_DESCR("Number of Duplicate Address Detection "
1678: "probes to send"),
1.70 atatat 1679: NULL, 0, &ip6_dad_count, 0,
1680: CTL_NET, PF_INET6, IPPROTO_IPV6,
1681: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1682: sysctl_createv(clog, 0, NULL, NULL,
1683: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1684: CTLTYPE_INT, "auto_flowlabel",
1685: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1686: NULL, 0, &ip6_auto_flowlabel, 0,
1687: CTL_NET, PF_INET6, IPPROTO_IPV6,
1688: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1689: sysctl_createv(clog, 0, NULL, NULL,
1690: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1691: CTLTYPE_INT, "defmcasthlim",
1692: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1693: NULL, 0, &ip6_defmcasthlim, 0,
1694: CTL_NET, PF_INET6, IPPROTO_IPV6,
1695: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1696: #if NGIF > 0
1.73 atatat 1697: sysctl_createv(clog, 0, NULL, NULL,
1698: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1699: CTLTYPE_INT, "gifhlim",
1700: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1701: NULL, 0, &ip6_gif_hlim, 0,
1702: CTL_NET, PF_INET6, IPPROTO_IPV6,
1703: IPV6CTL_GIF_HLIM, CTL_EOL);
1704: #endif /* NGIF */
1.73 atatat 1705: sysctl_createv(clog, 0, NULL, NULL,
1706: CTLFLAG_PERMANENT,
1.74 atatat 1707: CTLTYPE_STRING, "kame_version",
1708: SYSCTL_DESCR("KAME Version"),
1.78 christos 1709: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1710: CTL_NET, PF_INET6, IPPROTO_IPV6,
1711: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1712: sysctl_createv(clog, 0, NULL, NULL,
1713: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1714: CTLTYPE_INT, "use_deprecated",
1715: SYSCTL_DESCR("Allow use of deprecated addresses as "
1716: "source addresses"),
1.70 atatat 1717: NULL, 0, &ip6_use_deprecated, 0,
1718: CTL_NET, PF_INET6, IPPROTO_IPV6,
1719: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1720: sysctl_createv(clog, 0, NULL, NULL,
1721: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1722: CTLTYPE_INT, "rr_prune", NULL,
1723: NULL, 0, &ip6_rr_prune, 0,
1724: CTL_NET, PF_INET6, IPPROTO_IPV6,
1725: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1726: sysctl_createv(clog, 0, NULL, NULL,
1727: CTLFLAG_PERMANENT
1.70 atatat 1728: #ifndef INET6_BINDV6ONLY
1.73 atatat 1729: |CTLFLAG_READWRITE,
1.70 atatat 1730: #endif
1.74 atatat 1731: CTLTYPE_INT, "v6only",
1732: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1733: "to PF_INET sockets"),
1.70 atatat 1734: NULL, 0, &ip6_v6only, 0,
1735: CTL_NET, PF_INET6, IPPROTO_IPV6,
1736: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1737: sysctl_createv(clog, 0, NULL, NULL,
1738: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1739: CTLTYPE_INT, "anonportmin",
1740: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1741: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1742: CTL_NET, PF_INET6, IPPROTO_IPV6,
1743: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1744: sysctl_createv(clog, 0, NULL, NULL,
1745: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1746: CTLTYPE_INT, "anonportmax",
1747: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1748: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1749: CTL_NET, PF_INET6, IPPROTO_IPV6,
1750: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1751: #ifndef IPNOPRIVPORTS
1.73 atatat 1752: sysctl_createv(clog, 0, NULL, NULL,
1753: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1754: CTLTYPE_INT, "lowportmin",
1755: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1756: "to assign"),
1.70 atatat 1757: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1758: CTL_NET, PF_INET6, IPPROTO_IPV6,
1759: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1760: sysctl_createv(clog, 0, NULL, NULL,
1761: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1762: CTLTYPE_INT, "lowportmax",
1763: SYSCTL_DESCR("Highest privileged ephemeral port number "
1764: "to assign"),
1.70 atatat 1765: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1766: CTL_NET, PF_INET6, IPPROTO_IPV6,
1767: IPV6CTL_LOWPORTMAX, CTL_EOL);
1768: #endif /* IPNOPRIVPORTS */
1.73 atatat 1769: sysctl_createv(clog, 0, NULL, NULL,
1770: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1771: CTLTYPE_INT, "use_tempaddr",
1772: SYSCTL_DESCR("Use temporary address"),
1773: NULL, 0, &ip6_use_tempaddr, 0,
1774: CTL_NET, PF_INET6, IPPROTO_IPV6,
1775: CTL_CREATE, CTL_EOL);
1776: sysctl_createv(clog, 0, NULL, NULL,
1777: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1778: CTLTYPE_INT, "temppltime",
1779: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1780: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1781: CTL_NET, PF_INET6, IPPROTO_IPV6,
1782: CTL_CREATE, CTL_EOL);
1783: sysctl_createv(clog, 0, NULL, NULL,
1784: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1785: CTLTYPE_INT, "tempvltime",
1786: SYSCTL_DESCR("valid lifetime of a temporary address"),
1787: NULL, 0, &ip6_temp_valid_lifetime, 0,
1788: CTL_NET, PF_INET6, IPPROTO_IPV6,
1789: CTL_CREATE, CTL_EOL);
1790: sysctl_createv(clog, 0, NULL, NULL,
1791: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1792: CTLTYPE_INT, "maxfrags",
1793: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1794: NULL, 0, &ip6_maxfrags, 0,
1795: CTL_NET, PF_INET6, IPPROTO_IPV6,
1796: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1797: sysctl_createv(clog, 0, NULL, NULL,
1798: CTLFLAG_PERMANENT,
1799: CTLTYPE_STRUCT, "stats",
1800: SYSCTL_DESCR("IPv6 statistics"),
1801: NULL, 0, &ip6stat, sizeof(ip6stat),
1802: CTL_NET, PF_INET6, IPPROTO_IPV6,
1803: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1804: sysctl_createv(clog, 0, NULL, NULL,
1805: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1806: CTLTYPE_INT, "use_defaultzone",
1807: SYSCTL_DESCR("Whether to use the default scope zones"),
1808: NULL, 0, &ip6_use_defzone, 0,
1809: CTL_NET, PF_INET6, IPPROTO_IPV6,
1810: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1811: sysctl_createv(clog, 0, NULL, NULL,
1812: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1813: CTLTYPE_INT, "mcast_pmtu",
1814: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1815: NULL, 0, &ip6_mcast_pmtu, 0,
1816: CTL_NET, PF_INET6, IPPROTO_IPV6,
1817: CTL_CREATE, CTL_EOL);
1.2 itojun 1818: }
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