Annotation of src/sys/netinet6/ip6_input.c, Revision 1.82.2.1
1.82.2.1! rpaulo 1: /* $NetBSD: ip6_input.c,v 1.82 2006/01/23 23:01:40 yamt 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>
1.82.2.1! rpaulo 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.82 2006/01/23 23:01:40 yamt Exp $");
1.2 itojun 66:
67: #include "opt_inet.h"
1.4 thorpej 68: #include "opt_ipsec.h"
1.15 darrenr 69: #include "opt_pfil_hooks.h"
1.2 itojun 70:
71: #include <sys/param.h>
72: #include <sys/systm.h>
73: #include <sys/malloc.h>
74: #include <sys/mbuf.h>
75: #include <sys/domain.h>
76: #include <sys/protosw.h>
77: #include <sys/socket.h>
78: #include <sys/socketvar.h>
79: #include <sys/errno.h>
80: #include <sys/time.h>
81: #include <sys/kernel.h>
82: #include <sys/syslog.h>
83: #include <sys/proc.h>
1.46 simonb 84: #include <sys/sysctl.h>
1.2 itojun 85:
86: #include <net/if.h>
87: #include <net/if_types.h>
88: #include <net/if_dl.h>
89: #include <net/route.h>
90: #include <net/netisr.h>
1.15 darrenr 91: #ifdef PFIL_HOOKS
92: #include <net/pfil.h>
93: #endif
1.2 itojun 94:
95: #include <netinet/in.h>
1.9 itojun 96: #include <netinet/in_systm.h>
1.82.2.1! rpaulo 97: #include <netinet/in_pcb.h>
1.9 itojun 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>
1.14 itojun 105: #include <netinet/icmp6.h>
1.81 rpaulo 106: #include <netinet6/scope6_var.h>
1.2 itojun 107: #include <netinet6/in6_ifattach.h>
108: #include <netinet6/nd6.h>
109:
1.37 itojun 110: #ifdef IPSEC
111: #include <netinet6/ipsec.h>
112: #endif
113:
1.2 itojun 114: #include <netinet6/ip6protosw.h>
115:
116: #include "faith.h"
117: #include "gif.h"
1.50 itojun 118:
119: #if NGIF > 0
120: #include <netinet6/in6_gif.h>
121: #endif
1.2 itojun 122:
1.9 itojun 123: #include <net/net_osdep.h>
124:
1.2 itojun 125: extern struct domain inet6domain;
126:
127: u_char ip6_protox[IPPROTO_MAX];
128: static int ip6qmaxlen = IFQ_MAXLEN;
129: struct in6_ifaddr *in6_ifaddr;
130: struct ifqueue ip6intrq;
131:
132: int ip6_forward_srcrt; /* XXX */
133: int ip6_sourcecheck; /* XXX */
134: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 135:
1.29 thorpej 136: #ifdef PFIL_HOOKS
137: struct pfil_head inet6_pfil_hook;
138: #endif
139:
1.2 itojun 140: struct ip6stat ip6stat;
141:
142: static void ip6_init2 __P((void *));
1.81 rpaulo 143: static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *));
1.2 itojun 144:
1.5 itojun 145: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
1.62 itojun 146: static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));
1.2 itojun 147:
148: /*
149: * IP6 initialization: fill in IP6 protocol switch table.
150: * All protocols not implemented in kernel go to raw IP6 protocol handler.
151: */
152: void
153: ip6_init()
154: {
1.78 christos 155: const struct ip6protosw *pr;
1.35 itojun 156: int i;
1.2 itojun 157:
1.78 christos 158: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 159: if (pr == 0)
160: panic("ip6_init");
161: for (i = 0; i < IPPROTO_MAX; i++)
162: ip6_protox[i] = pr - inet6sw;
1.78 christos 163: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
164: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 165: if (pr->pr_domain->dom_family == PF_INET6 &&
166: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
167: ip6_protox[pr->pr_protocol] = pr - inet6sw;
168: ip6intrq.ifq_maxlen = ip6qmaxlen;
1.81 rpaulo 169: scope6_init();
170: addrsel_policy_init();
1.2 itojun 171: nd6_init();
172: frag6_init();
173:
174: ip6_init2((void *)0);
1.29 thorpej 175:
176: #ifdef PFIL_HOOKS
177: /* Register our Packet Filter hook. */
1.33 thorpej 178: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
179: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 180: i = pfil_head_register(&inet6_pfil_hook);
181: if (i != 0)
182: printf("ip6_init: WARNING: unable to register pfil hook, "
183: "error %d\n", i);
184: #endif /* PFIL_HOOKS */
1.2 itojun 185: }
186:
187: static void
188: ip6_init2(dummy)
189: void *dummy;
190: {
191:
192: /* nd6_timer_init */
1.19 thorpej 193: callout_init(&nd6_timer_ch);
194: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.2 itojun 195: }
196:
197: /*
198: * IP6 input interrupt handling. Just pass the packet to ip6_input.
199: */
200: void
201: ip6intr()
202: {
203: int s;
204: struct mbuf *m;
205:
206: for (;;) {
1.41 thorpej 207: s = splnet();
1.2 itojun 208: IF_DEQUEUE(&ip6intrq, m);
209: splx(s);
210: if (m == 0)
211: return;
212: ip6_input(m);
213: }
214: }
215:
216: extern struct route_in6 ip6_forward_rt;
217:
218: void
219: ip6_input(m)
220: struct mbuf *m;
221: {
1.9 itojun 222: struct ip6_hdr *ip6;
1.2 itojun 223: int off = sizeof(struct ip6_hdr), nest;
224: u_int32_t plen;
1.5 itojun 225: u_int32_t rtalert = ~0;
1.2 itojun 226: int nxt, ours = 0;
1.9 itojun 227: struct ifnet *deliverifp = NULL;
1.64 itojun 228: int srcrt = 0;
1.2 itojun 229:
230: #ifdef IPSEC
231: /*
232: * should the inner packet be considered authentic?
233: * see comment in ah4_input().
234: */
1.49 itojun 235: m->m_flags &= ~M_AUTHIPHDR;
236: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 237: #endif
1.9 itojun 238:
1.2 itojun 239: /*
1.81 rpaulo 240: * make sure we don't have onion peering information into m_tag.
241: */
242: ip6_delaux(m);
243:
244: /*
1.44 itojun 245: * mbuf statistics
1.2 itojun 246: */
247: if (m->m_flags & M_EXT) {
248: if (m->m_next)
249: ip6stat.ip6s_mext2m++;
250: else
251: ip6stat.ip6s_mext1++;
252: } else {
1.40 itojun 253: #define M2MMAX (sizeof(ip6stat.ip6s_m2m)/sizeof(ip6stat.ip6s_m2m[0]))
1.2 itojun 254: if (m->m_next) {
1.9 itojun 255: if (m->m_flags & M_LOOP) {
1.77 peter 256: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 257: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 258: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
259: else
260: ip6stat.ip6s_m2m[0]++;
261: } else
262: ip6stat.ip6s_m1++;
1.40 itojun 263: #undef M2MMAX
1.2 itojun 264: }
265:
1.9 itojun 266: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
267: ip6stat.ip6s_total++;
268:
1.57 thorpej 269: /*
270: * If the IPv6 header is not aligned, slurp it up into a new
271: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 272: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 273: * IPv6 header is in the first mbuf of the chain.
274: */
275: if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
276: struct ifnet *inifp = m->m_pkthdr.rcvif;
277: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
278: (max_linkhdr + 3) & ~3)) == NULL) {
279: /* XXXJRT new stat, please */
280: ip6stat.ip6s_toosmall++;
281: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
282: return;
283: }
284: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
285: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 286: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 287: ip6stat.ip6s_toosmall++;
288: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
289: return;
290: }
1.2 itojun 291: }
292:
293: ip6 = mtod(m, struct ip6_hdr *);
294:
295: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
296: ip6stat.ip6s_badvers++;
1.9 itojun 297: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 298: goto bad;
299: }
1.15 darrenr 300:
301: #ifdef PFIL_HOOKS
302: /*
303: * Run through list of hooks for input packets. If there are any
304: * filters which require that additional packets in the flow are
305: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
306: * Note that filters must _never_ set this flag, as another filter
307: * in the list may have previously cleared it.
308: */
1.39 itojun 309: /*
310: * let ipfilter look at packet on the wire,
311: * not the decapsulated packet.
312: */
313: #ifdef IPSEC
1.42 itojun 314: if (!ipsec_getnhist(m))
1.39 itojun 315: #else
316: if (1)
317: #endif
318: {
1.64 itojun 319: struct in6_addr odst;
320:
321: odst = ip6->ip6_dst;
1.39 itojun 322: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
323: PFIL_IN) != 0)
324: return;
325: if (m == NULL)
326: return;
327: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 328: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 329: }
1.15 darrenr 330: #endif /* PFIL_HOOKS */
331:
1.2 itojun 332: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
333:
1.30 thorpej 334: #ifdef ALTQ
335: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
336: /* packet is dropped by traffic conditioner */
337: return;
1.9 itojun 338: }
339: #endif
340:
1.2 itojun 341: /*
1.44 itojun 342: * Check against address spoofing/corruption.
1.2 itojun 343: */
344: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
345: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 346: /*
347: * XXX: "badscope" is not very suitable for a multicast source.
348: */
1.2 itojun 349: ip6stat.ip6s_badscope++;
1.9 itojun 350: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 351: goto bad;
352: }
1.13 itojun 353: /*
1.44 itojun 354: * The following check is not documented in specs. A malicious
355: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
356: * and bypass security checks (act as if it was from 127.0.0.1 by using
357: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 358: *
1.44 itojun 359: * This check chokes if we are in an SIIT cloud. As none of BSDs
360: * support IPv4-less kernel compilation, we cannot support SIIT
361: * environment at all. So, it makes more sense for us to reject any
362: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 363: * partial support for SIIT environment.
1.13 itojun 364: */
365: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
366: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
367: ip6stat.ip6s_badscope++;
368: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
369: goto bad;
370: }
1.17 itojun 371: #if 0
1.13 itojun 372: /*
1.17 itojun 373: * Reject packets with IPv4 compatible addresses (auto tunnel).
374: *
375: * The code forbids auto tunnel relay case in RFC1933 (the check is
376: * stronger than RFC1933). We may want to re-enable it if mech-xx
377: * is revised to forbid relaying case.
1.13 itojun 378: */
379: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
380: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
381: ip6stat.ip6s_badscope++;
382: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
383: goto bad;
384: }
385: #endif
1.35 itojun 386:
1.2 itojun 387: /*
1.82 yamt 388: * Disambiguate address scope zones (if there is ambiguity).
389: * We first make sure that the original source or destination address
390: * is not in our internal form for scoped addresses. Such addresses
391: * are not necessarily invalid spec-wise, but we cannot accept them due
392: * to the usage conflict.
393: * in6_setscope() then also checks and rejects the cases where src or
394: * dst are the loopback address and the receiving interface
395: * is not loopback.
396: */
397: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
398: ip6stat.ip6s_badscope++; /* XXX */
399: goto bad;
400: }
401: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
402: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
403: ip6stat.ip6s_badscope++;
404: goto bad;
405: }
406:
407: /*
1.2 itojun 408: * Multicast check
409: */
410: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
411: struct in6_multi *in6m = 0;
1.9 itojun 412:
413: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 414: /*
415: * See if we belong to the destination multicast group on the
416: * arrival interface.
417: */
418: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
419: if (in6m)
420: ours = 1;
421: else if (!ip6_mrouter) {
422: ip6stat.ip6s_notmember++;
423: ip6stat.ip6s_cantforward++;
1.9 itojun 424: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 425: goto bad;
426: }
1.9 itojun 427: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 428: goto hbhcheck;
429: }
430:
431: /*
432: * Unicast check
433: */
1.22 itojun 434: if (ip6_forward_rt.ro_rt != NULL &&
1.55 itojun 435: (ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 &&
1.22 itojun 436: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.72 itojun 437: &((struct sockaddr_in6 *)(&ip6_forward_rt.ro_dst))->sin6_addr))
1.25 itojun 438: ip6stat.ip6s_forward_cachehit++;
1.22 itojun 439: else {
1.35 itojun 440: struct sockaddr_in6 *dst6;
441:
1.2 itojun 442: if (ip6_forward_rt.ro_rt) {
1.22 itojun 443: /* route is down or destination is different */
1.25 itojun 444: ip6stat.ip6s_forward_cachemiss++;
1.2 itojun 445: RTFREE(ip6_forward_rt.ro_rt);
446: ip6_forward_rt.ro_rt = 0;
447: }
1.22 itojun 448:
1.2 itojun 449: bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6));
1.35 itojun 450: dst6 = (struct sockaddr_in6 *)&ip6_forward_rt.ro_dst;
451: dst6->sin6_len = sizeof(struct sockaddr_in6);
452: dst6->sin6_family = AF_INET6;
453: dst6->sin6_addr = ip6->ip6_dst;
1.2 itojun 454:
1.9 itojun 455: rtalloc((struct route *)&ip6_forward_rt);
1.2 itojun 456: }
457:
458: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
459:
460: /*
461: * Accept the packet if the forwarding interface to the destination
462: * according to the routing table is the loopback interface,
463: * unless the associated route has a gateway.
464: * Note that this approach causes to accept a packet if there is a
465: * route to the loopback interface for the destination of the packet.
466: * But we think it's even useful in some situations, e.g. when using
467: * a special daemon which wants to intercept the packet.
468: */
469: if (ip6_forward_rt.ro_rt &&
470: (ip6_forward_rt.ro_rt->rt_flags &
471: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55 itojun 472: !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2 itojun 473: #if 0
474: /*
475: * The check below is redundant since the comparison of
476: * the destination and the key of the rtentry has
477: * already done through looking up the routing table.
478: */
479: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55 itojun 480: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2 itojun 481: #endif
1.9 itojun 482: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 483: struct in6_ifaddr *ia6 =
484: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
485: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
486: m->m_flags |= M_ANYCAST6;
1.24 itojun 487: /*
488: * packets to a tentative, duplicated, or somehow invalid
489: * address must not be accepted.
490: */
1.2 itojun 491: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 492: /* this address is ready */
1.2 itojun 493: ours = 1;
1.9 itojun 494: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 495: goto hbhcheck;
496: } else {
1.24 itojun 497: /* address is not ready, so discard the packet. */
1.34 itojun 498: nd6log((LOG_INFO,
1.27 itojun 499: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 500: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 501: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 502:
503: goto bad;
1.2 itojun 504: }
505: }
506:
507: /*
1.55 itojun 508: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 509: */
510: #if defined(NFAITH) && 0 < NFAITH
511: if (ip6_keepfaith) {
1.71 itojun 512: if (ip6_forward_rt.ro_rt && ip6_forward_rt.ro_rt->rt_ifp &&
513: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 514: /* XXX do we need more sanity checks? */
515: ours = 1;
1.45 itojun 516: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 517: goto hbhcheck;
518: }
519: }
520: #endif
521:
522: #if 0
523: {
524: /*
525: * Last resort: check in6_ifaddr for incoming interface.
526: * The code is here until I update the "goto ours hack" code above
527: * working right.
528: */
529: struct ifaddr *ifa;
530: for (ifa = m->m_pkthdr.rcvif->if_addrlist.tqh_first;
531: ifa;
532: ifa = ifa->ifa_list.tqe_next) {
533: if (ifa->ifa_addr == NULL)
534: continue; /* just for safety */
535: if (ifa->ifa_addr->sa_family != AF_INET6)
536: continue;
537: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
538: ours = 1;
539: deliverifp = ifa->ifa_ifp;
1.2 itojun 540: goto hbhcheck;
541: }
542: }
1.9 itojun 543: }
1.2 itojun 544: #endif
545:
546: /*
547: * Now there is no reason to process the packet if it's not our own
548: * and we're not a router.
549: */
550: if (!ip6_forwarding) {
551: ip6stat.ip6s_cantforward++;
1.9 itojun 552: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 553: goto bad;
554: }
555:
556: hbhcheck:
557: /*
1.81 rpaulo 558: * record address information into m_tag, if we don't have one yet.
559: * note that we are unable to record it, if the address is not listed
560: * as our interface address (e.g. multicast addresses, addresses
561: * within FAITH prefixes and such).
562: */
563: if (deliverifp && !ip6_getdstifaddr(m)) {
564: struct in6_ifaddr *ia6;
565:
566: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
567: if (ia6) {
568: if (!ip6_setdstifaddr(m, ia6)) {
569: /*
570: * XXX maybe we should drop the packet here,
571: * as we could not provide enough information
572: * to the upper layers.
573: */
574: }
575: }
576: }
577:
578: /*
1.2 itojun 579: * Process Hop-by-Hop options header if it's contained.
580: * m may be modified in ip6_hopopts_input().
581: * If a JumboPayload option is included, plen will also be modified.
582: */
583: plen = (u_int32_t)ntohs(ip6->ip6_plen);
584: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 585: struct ip6_hbh *hbh;
586:
587: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
588: #if 0 /*touches NULL pointer*/
589: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
590: #endif
1.2 itojun 591: return; /* m have already been freed */
1.9 itojun 592: }
1.22 itojun 593:
1.2 itojun 594: /* adjust pointer */
595: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 596:
597: /*
1.49 itojun 598: * if the payload length field is 0 and the next header field
1.22 itojun 599: * indicates Hop-by-Hop Options header, then a Jumbo Payload
600: * option MUST be included.
601: */
602: if (ip6->ip6_plen == 0 && plen == 0) {
603: /*
604: * Note that if a valid jumbo payload option is
605: * contained, ip6_hoptops_input() must set a valid
1.55 itojun 606: * (non-zero) payload length to the variable plen.
1.22 itojun 607: */
608: ip6stat.ip6s_badoptions++;
609: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
610: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
611: icmp6_error(m, ICMP6_PARAM_PROB,
612: ICMP6_PARAMPROB_HEADER,
613: (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
614: return;
615: }
1.9 itojun 616: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
617: sizeof(struct ip6_hbh));
618: if (hbh == NULL) {
619: ip6stat.ip6s_tooshort++;
620: return;
621: }
1.57 thorpej 622: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 623: nxt = hbh->ip6h_nxt;
1.2 itojun 624:
625: /*
626: * accept the packet if a router alert option is included
627: * and we act as an IPv6 router.
628: */
1.5 itojun 629: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 630: ours = 1;
631: } else
632: nxt = ip6->ip6_nxt;
633:
634: /*
635: * Check that the amount of data in the buffers
636: * is as at least much as the IPv6 header would have us expect.
637: * Trim mbufs if longer than we expect.
638: * Drop packet if shorter than we expect.
639: */
640: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
641: ip6stat.ip6s_tooshort++;
1.9 itojun 642: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 643: goto bad;
644: }
645: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
646: if (m->m_len == m->m_pkthdr.len) {
647: m->m_len = sizeof(struct ip6_hdr) + plen;
648: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
649: } else
650: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
651: }
652:
653: /*
654: * Forward if desirable.
655: */
656: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
657: /*
658: * If we are acting as a multicast router, all
659: * incoming multicast packets are passed to the
660: * kernel-level multicast forwarding function.
661: * The packet is returned (relatively) intact; if
662: * ip6_mforward() returns a non-zero value, the packet
663: * must be discarded, else it may be accepted below.
664: */
665: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
666: ip6stat.ip6s_cantforward++;
667: m_freem(m);
668: return;
669: }
670: if (!ours) {
671: m_freem(m);
672: return;
673: }
1.22 itojun 674: } else if (!ours) {
1.64 itojun 675: ip6_forward(m, srcrt);
1.2 itojun 676: return;
1.56 itojun 677: }
1.25 itojun 678:
679: ip6 = mtod(m, struct ip6_hdr *);
680:
681: /*
682: * Malicious party may be able to use IPv4 mapped addr to confuse
683: * tcp/udp stack and bypass security checks (act as if it was from
684: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
685: *
686: * For SIIT end node behavior, you may want to disable the check.
687: * However, you will become vulnerable to attacks using IPv4 mapped
688: * source.
689: */
690: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
691: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
692: ip6stat.ip6s_badscope++;
693: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
694: goto bad;
695: }
1.2 itojun 696:
697: /*
698: * Tell launch routine the next header
699: */
1.12 itojun 700: #ifdef IFA_STATS
1.28 itojun 701: if (deliverifp != NULL) {
1.9 itojun 702: struct in6_ifaddr *ia6;
703: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
704: if (ia6)
705: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
706: }
707: #endif
1.2 itojun 708: ip6stat.ip6s_delivered++;
1.9 itojun 709: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 710: nest = 0;
1.40 itojun 711:
1.2 itojun 712: while (nxt != IPPROTO_DONE) {
713: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
714: ip6stat.ip6s_toomanyhdr++;
715: goto bad;
716: }
1.8 itojun 717:
718: /*
719: * protection against faulty packet - there should be
720: * more sanity checks in header chain processing.
721: */
722: if (m->m_pkthdr.len < off) {
723: ip6stat.ip6s_tooshort++;
1.9 itojun 724: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 725: goto bad;
726: }
727:
1.37 itojun 728: #ifdef IPSEC
729: /*
730: * enforce IPsec policy checking if we are seeing last header.
731: * note that we do not visit this with protocols with pcb layer
732: * code - like udp/tcp/raw ip.
733: */
734: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
735: ipsec6_in_reject(m, NULL)) {
736: ipsec6stat.in_polvio++;
737: goto bad;
738: }
739: #endif
1.56 itojun 740:
1.2 itojun 741: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
742: }
743: return;
744: bad:
745: m_freem(m);
746: }
747:
748: /*
1.81 rpaulo 749: * set/grab in6_ifaddr correspond to IPv6 destination address.
750: */
751: static struct m_tag *
752: ip6_setdstifaddr(m, ia6)
753: struct mbuf *m;
754: struct in6_ifaddr *ia6;
755: {
756: struct m_tag *mtag;
757:
758: mtag = ip6_addaux(m);
759: if (mtag)
760: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
761: return mtag; /* NULL if failed to set */
762: }
763:
764: struct in6_ifaddr *
765: ip6_getdstifaddr(m)
766: struct mbuf *m;
767: {
768: struct m_tag *mtag;
769:
770: mtag = ip6_findaux(m);
771: if (mtag)
772: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
773: else
774: return NULL;
775: }
776:
777: /*
1.2 itojun 778: * Hop-by-Hop options header processing. If a valid jumbo payload option is
779: * included, the real payload length will be stored in plenp.
780: */
781: static int
782: ip6_hopopts_input(plenp, rtalertp, mp, offp)
783: u_int32_t *plenp;
1.5 itojun 784: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 785: struct mbuf **mp;
786: int *offp;
787: {
1.35 itojun 788: struct mbuf *m = *mp;
1.2 itojun 789: int off = *offp, hbhlen;
790: struct ip6_hbh *hbh;
791:
792: /* validation of the length of the header */
1.9 itojun 793: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
794: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
795: if (hbh == NULL) {
796: ip6stat.ip6s_tooshort++;
797: return -1;
798: }
799: hbhlen = (hbh->ip6h_len + 1) << 3;
800: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
801: hbhlen);
802: if (hbh == NULL) {
803: ip6stat.ip6s_tooshort++;
804: return -1;
805: }
1.57 thorpej 806: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 807: off += hbhlen;
808: hbhlen -= sizeof(struct ip6_hbh);
809:
810: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
811: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 812: return (-1);
1.2 itojun 813:
814: *offp = off;
815: *mp = m;
1.58 itojun 816: return (0);
1.2 itojun 817: }
818:
819: /*
820: * Search header for all Hop-by-hop options and process each option.
821: * This function is separate from ip6_hopopts_input() in order to
822: * handle a case where the sending node itself process its hop-by-hop
823: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 824: *
825: * The function assumes that hbh header is located right after the IPv6 header
826: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
827: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 828: */
829: int
830: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
831: struct mbuf *m;
832: u_int8_t *opthead;
833: int hbhlen;
1.5 itojun 834: u_int32_t *rtalertp;
1.2 itojun 835: u_int32_t *plenp;
836: {
837: struct ip6_hdr *ip6;
838: int optlen = 0;
839: u_int8_t *opt = opthead;
840: u_int16_t rtalert_val;
1.22 itojun 841: u_int32_t jumboplen;
1.55 itojun 842: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 843:
844: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 845: switch (*opt) {
846: case IP6OPT_PAD1:
847: optlen = 1;
848: break;
849: case IP6OPT_PADN:
850: if (hbhlen < IP6OPT_MINLEN) {
851: ip6stat.ip6s_toosmall++;
852: goto bad;
853: }
854: optlen = *(opt + 1) + 2;
855: break;
856: case IP6OPT_RTALERT:
857: /* XXX may need check for alignment */
858: if (hbhlen < IP6OPT_RTALERT_LEN) {
859: ip6stat.ip6s_toosmall++;
860: goto bad;
861: }
862: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 863: /* XXX stat */
864: icmp6_error(m, ICMP6_PARAM_PROB,
865: ICMP6_PARAMPROB_HEADER,
866: erroff + opt + 1 - opthead);
867: return (-1);
1.35 itojun 868: }
869: optlen = IP6OPT_RTALERT_LEN;
870: bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
871: *rtalertp = ntohs(rtalert_val);
872: break;
873: case IP6OPT_JUMBO:
1.22 itojun 874: /* XXX may need check for alignment */
875: if (hbhlen < IP6OPT_JUMBO_LEN) {
876: ip6stat.ip6s_toosmall++;
877: goto bad;
878: }
1.35 itojun 879: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 880: /* XXX stat */
881: icmp6_error(m, ICMP6_PARAM_PROB,
882: ICMP6_PARAMPROB_HEADER,
883: erroff + opt + 1 - opthead);
884: return (-1);
1.35 itojun 885: }
1.22 itojun 886: optlen = IP6OPT_JUMBO_LEN;
887:
888: /*
889: * IPv6 packets that have non 0 payload length
1.35 itojun 890: * must not contain a jumbo payload option.
1.22 itojun 891: */
892: ip6 = mtod(m, struct ip6_hdr *);
893: if (ip6->ip6_plen) {
894: ip6stat.ip6s_badoptions++;
895: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 896: ICMP6_PARAMPROB_HEADER,
897: erroff + opt - opthead);
898: return (-1);
1.22 itojun 899: }
1.2 itojun 900:
1.22 itojun 901: /*
902: * We may see jumbolen in unaligned location, so
903: * we'd need to perform bcopy().
904: */
905: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
906: jumboplen = (u_int32_t)htonl(jumboplen);
907:
908: #if 1
909: /*
910: * if there are multiple jumbo payload options,
911: * *plenp will be non-zero and the packet will be
912: * rejected.
913: * the behavior may need some debate in ipngwg -
914: * multiple options does not make sense, however,
915: * there's no explicit mention in specification.
916: */
917: if (*plenp != 0) {
918: ip6stat.ip6s_badoptions++;
919: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 920: ICMP6_PARAMPROB_HEADER,
921: erroff + opt + 2 - opthead);
922: return (-1);
1.22 itojun 923: }
1.8 itojun 924: #endif
1.2 itojun 925:
1.22 itojun 926: /*
927: * jumbo payload length must be larger than 65535.
928: */
929: if (jumboplen <= IPV6_MAXPACKET) {
930: ip6stat.ip6s_badoptions++;
931: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 932: ICMP6_PARAMPROB_HEADER,
933: erroff + opt + 2 - opthead);
934: return (-1);
1.22 itojun 935: }
936: *plenp = jumboplen;
937:
938: break;
1.35 itojun 939: default: /* unknown option */
940: if (hbhlen < IP6OPT_MINLEN) {
941: ip6stat.ip6s_toosmall++;
942: goto bad;
943: }
1.55 itojun 944: optlen = ip6_unknown_opt(opt, m,
945: erroff + opt - opthead);
946: if (optlen == -1)
947: return (-1);
1.35 itojun 948: optlen += 2;
949: break;
1.2 itojun 950: }
951: }
952:
1.55 itojun 953: return (0);
1.2 itojun 954:
955: bad:
956: m_freem(m);
1.55 itojun 957: return (-1);
1.2 itojun 958: }
959:
960: /*
961: * Unknown option processing.
962: * The third argument `off' is the offset from the IPv6 header to the option,
963: * which is necessary if the IPv6 header the and option header and IPv6 header
964: * is not continuous in order to return an ICMPv6 error.
965: */
966: int
967: ip6_unknown_opt(optp, m, off)
968: u_int8_t *optp;
969: struct mbuf *m;
970: int off;
971: {
972: struct ip6_hdr *ip6;
973:
1.35 itojun 974: switch (IP6OPT_TYPE(*optp)) {
975: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 976: return ((int)*(optp + 1));
1.35 itojun 977: case IP6OPT_TYPE_DISCARD: /* silently discard */
978: m_freem(m);
1.58 itojun 979: return (-1);
1.35 itojun 980: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
981: ip6stat.ip6s_badoptions++;
982: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 983: return (-1);
1.35 itojun 984: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
985: ip6stat.ip6s_badoptions++;
986: ip6 = mtod(m, struct ip6_hdr *);
987: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
988: (m->m_flags & (M_BCAST|M_MCAST)))
989: m_freem(m);
990: else
991: icmp6_error(m, ICMP6_PARAM_PROB,
992: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 993: return (-1);
1.2 itojun 994: }
995:
996: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 997: return (-1);
1.2 itojun 998: }
999:
1000: /*
1.9 itojun 1001: * Create the "control" list for this pcb.
1002: *
1003: * The routine will be called from upper layer handlers like tcp6_input().
1004: * Thus the routine assumes that the caller (tcp6_input) have already
1005: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1006: * very first mbuf on the mbuf chain.
1007: * We may want to add some infinite loop prevention or sanity checks for safety.
1008: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1009: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1010: */
1011: void
1012: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 1013: struct in6pcb *in6p;
1014: struct mbuf **mp;
1015: struct ip6_hdr *ip6;
1016: struct mbuf *m;
1.2 itojun 1017: {
1.9 itojun 1018:
1019: #ifdef SO_TIMESTAMP
1.2 itojun 1020: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1021: struct timeval tv;
1022:
1023: microtime(&tv);
1024: *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
1.63 itojun 1025: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1026: if (*mp)
1027: mp = &(*mp)->m_next;
1028: }
1.9 itojun 1029: #endif
1.2 itojun 1030: if (in6p->in6p_flags & IN6P_RECVDSTADDR) {
1031: *mp = sbcreatecontrol((caddr_t) &ip6->ip6_dst,
1.63 itojun 1032: sizeof(struct in6_addr), IPV6_RECVDSTADDR, IPPROTO_IPV6);
1.2 itojun 1033: if (*mp)
1034: mp = &(*mp)->m_next;
1035: }
1036:
1037: #ifdef noyet
1038: /* options were tossed above */
1039: if (in6p->in6p_flags & IN6P_RECVOPTS)
1040: /* broken */
1041: /* ip6_srcroute doesn't do what we want here, need to fix */
1042: if (in6p->in6p_flags & IPV6P_RECVRETOPTS)
1043: /* broken */
1044: #endif
1045:
1046: /* RFC 2292 sec. 5 */
1.35 itojun 1047: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1048: struct in6_pktinfo pi6;
1049: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1050: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.2 itojun 1051: pi6.ipi6_ifindex = (m && m->m_pkthdr.rcvif)
1052: ? m->m_pkthdr.rcvif->if_index
1053: : 0;
1054: *mp = sbcreatecontrol((caddr_t) &pi6,
1.63 itojun 1055: sizeof(struct in6_pktinfo), IPV6_PKTINFO, IPPROTO_IPV6);
1.2 itojun 1056: if (*mp)
1057: mp = &(*mp)->m_next;
1058: }
1059: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1060: int hlim = ip6->ip6_hlim & 0xff;
1.63 itojun 1061: *mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),
1062: IPV6_HOPLIMIT, IPPROTO_IPV6);
1.2 itojun 1063: if (*mp)
1064: mp = &(*mp)->m_next;
1065: }
1066: /* IN6P_NEXTHOP - for outgoing packet only */
1067:
1068: /*
1.75 itojun 1069: * IPV6_HOPOPTS socket option. Recall that we required super-user
1070: * privilege for the option (see ip6_ctloutput), but it might be too
1071: * strict, since there might be some hop-by-hop options which can be
1072: * returned to normal user.
1073: * See also RFC 2292 section 6.
1.2 itojun 1074: */
1.75 itojun 1075: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1076: /*
1077: * Check if a hop-by-hop options header is contatined in the
1078: * received packet, and if so, store the options as ancillary
1079: * data. Note that a hop-by-hop options header must be
1080: * just after the IPv6 header, which fact is assured through
1081: * the IPv6 input processing.
1082: */
1.78 christos 1083: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1084: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1085: struct ip6_hbh *hbh;
1086: int hbhlen;
1.62 itojun 1087: struct mbuf *ext;
1.9 itojun 1088:
1.62 itojun 1089: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1090: xip6->ip6_nxt);
1.62 itojun 1091: if (ext == NULL) {
1.9 itojun 1092: ip6stat.ip6s_tooshort++;
1093: return;
1094: }
1.62 itojun 1095: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1096: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1097: if (hbhlen != ext->m_len) {
1098: m_freem(ext);
1.9 itojun 1099: ip6stat.ip6s_tooshort++;
1100: return;
1101: }
1.2 itojun 1102:
1103: /*
1104: * XXX: We copy whole the header even if a jumbo
1105: * payload option is included, which option is to
1106: * be removed before returning in the RFC 2292.
1107: * But it's too painful operation...
1108: */
1.9 itojun 1109: *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
1.63 itojun 1110: IPV6_HOPOPTS, IPPROTO_IPV6);
1.2 itojun 1111: if (*mp)
1112: mp = &(*mp)->m_next;
1.62 itojun 1113: m_freem(ext);
1.2 itojun 1114: }
1115: }
1116:
1117: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1118: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1119: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1120: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1121:
1122: /*
1123: * Search for destination options headers or routing
1124: * header(s) through the header chain, and stores each
1125: * header as ancillary data.
1126: * Note that the order of the headers remains in
1127: * the chain of ancillary data.
1128: */
1.35 itojun 1129: while (1) { /* is explicit loop prevention necessary? */
1.62 itojun 1130: struct ip6_ext *ip6e = NULL;
1.9 itojun 1131: int elen;
1.62 itojun 1132: struct mbuf *ext = NULL;
1.9 itojun 1133:
1.62 itojun 1134: /*
1135: * if it is not an extension header, don't try to
1136: * pull it from the chain.
1137: */
1138: switch (nxt) {
1139: case IPPROTO_DSTOPTS:
1140: case IPPROTO_ROUTING:
1141: case IPPROTO_HOPOPTS:
1142: case IPPROTO_AH: /* is it possible? */
1143: break;
1144: default:
1145: goto loopend;
1146: }
1147:
1148: ext = ip6_pullexthdr(m, off, nxt);
1149: if (ext == NULL) {
1.9 itojun 1150: ip6stat.ip6s_tooshort++;
1151: return;
1152: }
1.62 itojun 1153: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1154: if (nxt == IPPROTO_AH)
1155: elen = (ip6e->ip6e_len + 2) << 2;
1156: else
1157: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1158: if (elen != ext->m_len) {
1159: m_freem(ext);
1.9 itojun 1160: ip6stat.ip6s_tooshort++;
1161: return;
1162: }
1.57 thorpej 1163: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1164:
1.35 itojun 1165: switch (nxt) {
1.62 itojun 1166: case IPPROTO_DSTOPTS:
1.35 itojun 1167: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1168: break;
1169:
1170: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.63 itojun 1171: IPV6_DSTOPTS, IPPROTO_IPV6);
1.35 itojun 1172: if (*mp)
1173: mp = &(*mp)->m_next;
1174: break;
1175:
1176: case IPPROTO_ROUTING:
1177: if (!in6p->in6p_flags & IN6P_RTHDR)
1178: break;
1179:
1180: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.63 itojun 1181: IPV6_RTHDR, IPPROTO_IPV6);
1.35 itojun 1182: if (*mp)
1183: mp = &(*mp)->m_next;
1184: break;
1185:
1.62 itojun 1186: case IPPROTO_HOPOPTS:
1187: case IPPROTO_AH: /* is it possible? */
1188: break;
1189:
1.35 itojun 1190: default:
1191: /*
1.62 itojun 1192: * other cases have been filtered in the above.
1193: * none will visit this case. here we supply
1194: * the code just in case (nxt overwritten or
1195: * other cases).
1.35 itojun 1196: */
1.62 itojun 1197: m_freem(ext);
1.35 itojun 1198: goto loopend;
1199:
1.2 itojun 1200: }
1201:
1202: /* proceed with the next header. */
1.9 itojun 1203: off += elen;
1.2 itojun 1204: nxt = ip6e->ip6e_nxt;
1.62 itojun 1205: ip6e = NULL;
1206: m_freem(ext);
1207: ext = NULL;
1.2 itojun 1208: }
1209: loopend:
1.62 itojun 1210: ;
1.2 itojun 1211: }
1.62 itojun 1212: }
1213:
1214: /*
1215: * pull single extension header from mbuf chain. returns single mbuf that
1216: * contains the result, or NULL on error.
1217: */
1218: static struct mbuf *
1219: ip6_pullexthdr(m, off, nxt)
1220: struct mbuf *m;
1221: size_t off;
1222: int nxt;
1223: {
1224: struct ip6_ext ip6e;
1225: size_t elen;
1226: struct mbuf *n;
1227:
1228: #ifdef DIAGNOSTIC
1229: switch (nxt) {
1230: case IPPROTO_DSTOPTS:
1231: case IPPROTO_ROUTING:
1232: case IPPROTO_HOPOPTS:
1233: case IPPROTO_AH: /* is it possible? */
1234: break;
1235: default:
1236: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1237: }
1.62 itojun 1238: #endif
1.2 itojun 1239:
1.62 itojun 1240: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1241: if (nxt == IPPROTO_AH)
1242: elen = (ip6e.ip6e_len + 2) << 2;
1243: else
1244: elen = (ip6e.ip6e_len + 1) << 3;
1245:
1246: MGET(n, M_DONTWAIT, MT_DATA);
1247: if (n && elen >= MLEN) {
1248: MCLGET(n, M_DONTWAIT);
1249: if ((n->m_flags & M_EXT) == 0) {
1250: m_free(n);
1251: n = NULL;
1252: }
1253: }
1254: if (!n)
1255: return NULL;
1256:
1257: n->m_len = 0;
1258: if (elen >= M_TRAILINGSPACE(n)) {
1259: m_free(n);
1260: return NULL;
1261: }
1262:
1263: m_copydata(m, off, elen, mtod(n, caddr_t));
1264: n->m_len = elen;
1265: return n;
1.2 itojun 1266: }
1267:
1268: /*
1269: * Get pointer to the previous header followed by the header
1270: * currently processed.
1271: * XXX: This function supposes that
1272: * M includes all headers,
1273: * the next header field and the header length field of each header
1274: * are valid, and
1275: * the sum of each header length equals to OFF.
1276: * Because of these assumptions, this function must be called very
1277: * carefully. Moreover, it will not be used in the near future when
1278: * we develop `neater' mechanism to process extension headers.
1279: */
1.58 itojun 1280: u_int8_t *
1.2 itojun 1281: ip6_get_prevhdr(m, off)
1282: struct mbuf *m;
1283: int off;
1284: {
1285: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1286:
1287: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1288: return (&ip6->ip6_nxt);
1.2 itojun 1289: else {
1290: int len, nxt;
1291: struct ip6_ext *ip6e = NULL;
1292:
1293: nxt = ip6->ip6_nxt;
1294: len = sizeof(struct ip6_hdr);
1295: while (len < off) {
1296: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
1297:
1.35 itojun 1298: switch (nxt) {
1.2 itojun 1299: case IPPROTO_FRAGMENT:
1300: len += sizeof(struct ip6_frag);
1301: break;
1302: case IPPROTO_AH:
1303: len += (ip6e->ip6e_len + 2) << 2;
1304: break;
1305: default:
1306: len += (ip6e->ip6e_len + 1) << 3;
1307: break;
1308: }
1309: nxt = ip6e->ip6e_nxt;
1310: }
1311: if (ip6e)
1.58 itojun 1312: return (&ip6e->ip6e_nxt);
1.2 itojun 1313: else
1314: return NULL;
1.18 itojun 1315: }
1316: }
1317:
1318: /*
1319: * get next header offset. m will be retained.
1320: */
1321: int
1322: ip6_nexthdr(m, off, proto, nxtp)
1323: struct mbuf *m;
1324: int off;
1325: int proto;
1326: int *nxtp;
1327: {
1328: struct ip6_hdr ip6;
1329: struct ip6_ext ip6e;
1330: struct ip6_frag fh;
1331:
1332: /* just in case */
1333: if (m == NULL)
1334: panic("ip6_nexthdr: m == NULL");
1335: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1336: return -1;
1337:
1338: switch (proto) {
1339: case IPPROTO_IPV6:
1340: if (m->m_pkthdr.len < off + sizeof(ip6))
1341: return -1;
1342: m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
1343: if (nxtp)
1344: *nxtp = ip6.ip6_nxt;
1345: off += sizeof(ip6);
1346: return off;
1347:
1348: case IPPROTO_FRAGMENT:
1349: /*
1350: * terminate parsing if it is not the first fragment,
1351: * it does not make sense to parse through it.
1352: */
1353: if (m->m_pkthdr.len < off + sizeof(fh))
1354: return -1;
1355: m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
1.67 itojun 1356: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1357: return -1;
1358: if (nxtp)
1359: *nxtp = fh.ip6f_nxt;
1360: off += sizeof(struct ip6_frag);
1361: return off;
1362:
1363: case IPPROTO_AH:
1364: if (m->m_pkthdr.len < off + sizeof(ip6e))
1365: return -1;
1366: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1367: if (nxtp)
1368: *nxtp = ip6e.ip6e_nxt;
1369: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1370: if (m->m_pkthdr.len < off)
1371: return -1;
1.18 itojun 1372: return off;
1373:
1374: case IPPROTO_HOPOPTS:
1375: case IPPROTO_ROUTING:
1376: case IPPROTO_DSTOPTS:
1377: if (m->m_pkthdr.len < off + sizeof(ip6e))
1378: return -1;
1379: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1380: if (nxtp)
1381: *nxtp = ip6e.ip6e_nxt;
1382: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1383: if (m->m_pkthdr.len < off)
1384: return -1;
1.18 itojun 1385: return off;
1386:
1387: case IPPROTO_NONE:
1388: case IPPROTO_ESP:
1389: case IPPROTO_IPCOMP:
1390: /* give up */
1391: return -1;
1392:
1393: default:
1394: return -1;
1395: }
1396: }
1397:
1398: /*
1399: * get offset for the last header in the chain. m will be kept untainted.
1400: */
1401: int
1402: ip6_lasthdr(m, off, proto, nxtp)
1403: struct mbuf *m;
1404: int off;
1405: int proto;
1406: int *nxtp;
1407: {
1408: int newoff;
1409: int nxt;
1410:
1411: if (!nxtp) {
1412: nxt = -1;
1413: nxtp = &nxt;
1414: }
1415: while (1) {
1416: newoff = ip6_nexthdr(m, off, proto, nxtp);
1417: if (newoff < 0)
1418: return off;
1419: else if (newoff < off)
1420: return -1; /* invalid */
1421: else if (newoff == off)
1422: return newoff;
1423:
1424: off = newoff;
1425: proto = *nxtp;
1.2 itojun 1426: }
1427: }
1428:
1.81 rpaulo 1429: struct m_tag *
1430: ip6_addaux(m)
1431: struct mbuf *m;
1432: {
1433: struct m_tag *mtag;
1434:
1435: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1436: if (!mtag) {
1437: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1438: M_NOWAIT);
1439: if (mtag) {
1440: m_tag_prepend(m, mtag);
1441: bzero(mtag + 1, sizeof(struct ip6aux));
1442: }
1443: }
1444: return mtag;
1445: }
1446:
1447: struct m_tag *
1448: ip6_findaux(m)
1449: struct mbuf *m;
1450: {
1451: struct m_tag *mtag;
1452:
1453: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1454: return mtag;
1455: }
1456:
1457: void
1458: ip6_delaux(m)
1459: struct mbuf *m;
1460: {
1461: struct m_tag *mtag;
1462:
1463: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1464: if (mtag)
1465: m_tag_delete(m, mtag);
1466: }
1467:
1.2 itojun 1468: /*
1469: * System control for IP6
1470: */
1471:
1472: u_char inet6ctlerrmap[PRC_NCMDS] = {
1473: 0, 0, 0, 0,
1474: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1475: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1476: EMSGSIZE, EHOSTUNREACH, 0, 0,
1477: 0, 0, 0, 0,
1478: ENOPROTOOPT
1479: };
1480:
1.70 atatat 1481: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1482: {
1.26 itojun 1483:
1.73 atatat 1484: sysctl_createv(clog, 0, NULL, NULL,
1485: CTLFLAG_PERMANENT,
1.70 atatat 1486: CTLTYPE_NODE, "net", NULL,
1487: NULL, 0, NULL, 0,
1488: CTL_NET, CTL_EOL);
1.73 atatat 1489: sysctl_createv(clog, 0, NULL, NULL,
1490: CTLFLAG_PERMANENT,
1.74 atatat 1491: CTLTYPE_NODE, "inet6",
1492: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1493: NULL, 0, NULL, 0,
1494: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1495: sysctl_createv(clog, 0, NULL, NULL,
1496: CTLFLAG_PERMANENT,
1.74 atatat 1497: CTLTYPE_NODE, "ip6",
1498: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1499: NULL, 0, NULL, 0,
1500: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1501:
1.73 atatat 1502: sysctl_createv(clog, 0, NULL, NULL,
1503: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1504: CTLTYPE_INT, "forwarding",
1505: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1506: NULL, 0, &ip6_forwarding, 0,
1507: CTL_NET, PF_INET6, IPPROTO_IPV6,
1508: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1509: sysctl_createv(clog, 0, NULL, NULL,
1510: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1511: CTLTYPE_INT, "redirect",
1512: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1513: NULL, 0, &ip6_sendredirects, 0,
1514: CTL_NET, PF_INET6, IPPROTO_IPV6,
1515: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1516: sysctl_createv(clog, 0, NULL, NULL,
1517: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1518: CTLTYPE_INT, "hlim",
1519: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1520: NULL, 0, &ip6_defhlim, 0,
1521: CTL_NET, PF_INET6, IPPROTO_IPV6,
1522: IPV6CTL_DEFHLIM, CTL_EOL);
1523: #ifdef notyet
1.73 atatat 1524: sysctl_createv(clog, 0, NULL, NULL,
1525: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1526: CTLTYPE_INT, "mtu", NULL,
1527: NULL, 0, &, 0,
1528: CTL_NET, PF_INET6, IPPROTO_IPV6,
1529: IPV6CTL_DEFMTU, CTL_EOL);
1530: #endif
1531: #ifdef __no_idea__
1.73 atatat 1532: sysctl_createv(clog, 0, NULL, NULL,
1533: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1534: CTLTYPE_INT, "forwsrcrt", NULL,
1535: NULL, 0, &?, 0,
1536: CTL_NET, PF_INET6, IPPROTO_IPV6,
1537: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1538: sysctl_createv(clog, 0, NULL, NULL,
1539: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1540: CTLTYPE_STRUCT, "mrtstats", NULL,
1541: NULL, 0, &?, sizeof(?),
1542: CTL_NET, PF_INET6, IPPROTO_IPV6,
1543: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1544: sysctl_createv(clog, 0, NULL, NULL,
1545: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1546: CTLTYPE_?, "mrtproto", NULL,
1547: NULL, 0, &?, sizeof(?),
1548: CTL_NET, PF_INET6, IPPROTO_IPV6,
1549: IPV6CTL_MRTPROTO, CTL_EOL);
1550: #endif
1.73 atatat 1551: sysctl_createv(clog, 0, NULL, NULL,
1552: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1553: CTLTYPE_INT, "maxfragpackets",
1554: SYSCTL_DESCR("Maximum number of fragments to buffer "
1555: "for reassembly"),
1.70 atatat 1556: NULL, 0, &ip6_maxfragpackets, 0,
1557: CTL_NET, PF_INET6, IPPROTO_IPV6,
1558: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1559: #ifdef __no_idea__
1.73 atatat 1560: sysctl_createv(clog, 0, NULL, NULL,
1561: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1562: CTLTYPE_INT, "sourcecheck", NULL,
1563: NULL, 0, &?, 0,
1564: CTL_NET, PF_INET6, IPPROTO_IPV6,
1565: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1566: sysctl_createv(clog, 0, NULL, NULL,
1567: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1568: CTLTYPE_INT, "sourcecheck_logint", NULL,
1569: NULL, 0, &?, 0,
1570: CTL_NET, PF_INET6, IPPROTO_IPV6,
1571: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1572: #endif
1.73 atatat 1573: sysctl_createv(clog, 0, NULL, NULL,
1574: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1575: CTLTYPE_INT, "accept_rtadv",
1576: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1577: NULL, 0, &ip6_accept_rtadv, 0,
1578: CTL_NET, PF_INET6, IPPROTO_IPV6,
1579: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1580: sysctl_createv(clog, 0, NULL, NULL,
1581: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1582: CTLTYPE_INT, "keepfaith",
1583: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1584: NULL, 0, &ip6_keepfaith, 0,
1585: CTL_NET, PF_INET6, IPPROTO_IPV6,
1586: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1587: sysctl_createv(clog, 0, NULL, NULL,
1588: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1589: CTLTYPE_INT, "log_interval",
1590: SYSCTL_DESCR("Minumum interval between logging "
1591: "unroutable packets"),
1.70 atatat 1592: NULL, 0, &ip6_log_interval, 0,
1593: CTL_NET, PF_INET6, IPPROTO_IPV6,
1594: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1595: sysctl_createv(clog, 0, NULL, NULL,
1596: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1597: CTLTYPE_INT, "hdrnestlimit",
1598: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1599: NULL, 0, &ip6_hdrnestlimit, 0,
1600: CTL_NET, PF_INET6, IPPROTO_IPV6,
1601: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1602: sysctl_createv(clog, 0, NULL, NULL,
1603: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1604: CTLTYPE_INT, "dad_count",
1605: SYSCTL_DESCR("Number of Duplicate Address Detection "
1606: "probes to send"),
1.70 atatat 1607: NULL, 0, &ip6_dad_count, 0,
1608: CTL_NET, PF_INET6, IPPROTO_IPV6,
1609: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1610: sysctl_createv(clog, 0, NULL, NULL,
1611: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1612: CTLTYPE_INT, "auto_flowlabel",
1613: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1614: NULL, 0, &ip6_auto_flowlabel, 0,
1615: CTL_NET, PF_INET6, IPPROTO_IPV6,
1616: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1617: sysctl_createv(clog, 0, NULL, NULL,
1618: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1619: CTLTYPE_INT, "defmcasthlim",
1620: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1621: NULL, 0, &ip6_defmcasthlim, 0,
1622: CTL_NET, PF_INET6, IPPROTO_IPV6,
1623: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1624: #if NGIF > 0
1.73 atatat 1625: sysctl_createv(clog, 0, NULL, NULL,
1626: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1627: CTLTYPE_INT, "gifhlim",
1628: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1629: NULL, 0, &ip6_gif_hlim, 0,
1630: CTL_NET, PF_INET6, IPPROTO_IPV6,
1631: IPV6CTL_GIF_HLIM, CTL_EOL);
1632: #endif /* NGIF */
1.73 atatat 1633: sysctl_createv(clog, 0, NULL, NULL,
1634: CTLFLAG_PERMANENT,
1.74 atatat 1635: CTLTYPE_STRING, "kame_version",
1636: SYSCTL_DESCR("KAME Version"),
1.78 christos 1637: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1638: CTL_NET, PF_INET6, IPPROTO_IPV6,
1639: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1640: sysctl_createv(clog, 0, NULL, NULL,
1641: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1642: CTLTYPE_INT, "use_deprecated",
1643: SYSCTL_DESCR("Allow use of deprecated addresses as "
1644: "source addresses"),
1.70 atatat 1645: NULL, 0, &ip6_use_deprecated, 0,
1646: CTL_NET, PF_INET6, IPPROTO_IPV6,
1647: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1648: sysctl_createv(clog, 0, NULL, NULL,
1649: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1650: CTLTYPE_INT, "rr_prune", NULL,
1651: NULL, 0, &ip6_rr_prune, 0,
1652: CTL_NET, PF_INET6, IPPROTO_IPV6,
1653: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1654: sysctl_createv(clog, 0, NULL, NULL,
1655: CTLFLAG_PERMANENT
1.70 atatat 1656: #ifndef INET6_BINDV6ONLY
1.73 atatat 1657: |CTLFLAG_READWRITE,
1.70 atatat 1658: #endif
1.74 atatat 1659: CTLTYPE_INT, "v6only",
1660: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1661: "to PF_INET sockets"),
1.70 atatat 1662: NULL, 0, &ip6_v6only, 0,
1663: CTL_NET, PF_INET6, IPPROTO_IPV6,
1664: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1665: sysctl_createv(clog, 0, NULL, NULL,
1666: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1667: CTLTYPE_INT, "anonportmin",
1668: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1669: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1670: CTL_NET, PF_INET6, IPPROTO_IPV6,
1671: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1672: sysctl_createv(clog, 0, NULL, NULL,
1673: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1674: CTLTYPE_INT, "anonportmax",
1675: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1676: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1677: CTL_NET, PF_INET6, IPPROTO_IPV6,
1678: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1679: #ifndef IPNOPRIVPORTS
1.73 atatat 1680: sysctl_createv(clog, 0, NULL, NULL,
1681: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1682: CTLTYPE_INT, "lowportmin",
1683: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1684: "to assign"),
1.70 atatat 1685: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1686: CTL_NET, PF_INET6, IPPROTO_IPV6,
1687: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1688: sysctl_createv(clog, 0, NULL, NULL,
1689: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1690: CTLTYPE_INT, "lowportmax",
1691: SYSCTL_DESCR("Highest privileged ephemeral port number "
1692: "to assign"),
1.70 atatat 1693: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1694: CTL_NET, PF_INET6, IPPROTO_IPV6,
1695: IPV6CTL_LOWPORTMAX, CTL_EOL);
1696: #endif /* IPNOPRIVPORTS */
1.73 atatat 1697: sysctl_createv(clog, 0, NULL, NULL,
1698: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1699: CTLTYPE_INT, "maxfrags",
1700: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1701: NULL, 0, &ip6_maxfrags, 0,
1702: CTL_NET, PF_INET6, IPPROTO_IPV6,
1703: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1704: sysctl_createv(clog, 0, NULL, NULL,
1705: CTLFLAG_PERMANENT,
1706: CTLTYPE_STRUCT, "stats",
1707: SYSCTL_DESCR("IPv6 statistics"),
1708: NULL, 0, &ip6stat, sizeof(ip6stat),
1709: CTL_NET, PF_INET6, IPPROTO_IPV6,
1710: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1711: sysctl_createv(clog, 0, NULL, NULL,
1712: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1713: CTLTYPE_INT, "use_defaultzone",
1714: SYSCTL_DESCR("Whether to use the default scope zones"),
1715: NULL, 0, &ip6_use_defzone, 0,
1716: CTL_NET, PF_INET6, IPPROTO_IPV6,
1717: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.2 itojun 1718: }
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