Annotation of src/sys/netinet6/ip6_input.c, Revision 1.77.12.1
1.77.12.1! riz 1: /* $NetBSD: ip6_input.c,v 1.77 2004/12/04 16:10:25 peter 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>
1.77.12.1! riz 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.77 2004/12/04 16:10:25 peter 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>
97: #ifdef INET
98: #include <netinet/ip.h>
99: #include <netinet/ip_icmp.h>
1.45 itojun 100: #endif /* INET */
1.14 itojun 101: #include <netinet/ip6.h>
1.2 itojun 102: #include <netinet6/in6_var.h>
1.11 itojun 103: #include <netinet6/ip6_var.h>
1.2 itojun 104: #include <netinet6/in6_pcb.h>
1.14 itojun 105: #include <netinet/icmp6.h>
1.2 itojun 106: #include <netinet6/in6_ifattach.h>
107: #include <netinet6/nd6.h>
108:
1.37 itojun 109: #ifdef IPSEC
110: #include <netinet6/ipsec.h>
111: #endif
112:
1.2 itojun 113: #include <netinet6/ip6protosw.h>
114:
115: #include "faith.h"
116: #include "gif.h"
1.50 itojun 117:
118: #if NGIF > 0
119: #include <netinet6/in6_gif.h>
120: #endif
1.2 itojun 121:
1.9 itojun 122: #include <net/net_osdep.h>
123:
1.2 itojun 124: extern struct domain inet6domain;
125:
126: u_char ip6_protox[IPPROTO_MAX];
127: static int ip6qmaxlen = IFQ_MAXLEN;
128: struct in6_ifaddr *in6_ifaddr;
129: struct ifqueue ip6intrq;
130:
131: int ip6_forward_srcrt; /* XXX */
132: int ip6_sourcecheck; /* XXX */
133: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 134:
1.29 thorpej 135: #ifdef PFIL_HOOKS
136: struct pfil_head inet6_pfil_hook;
137: #endif
138:
1.2 itojun 139: struct ip6stat ip6stat;
140:
141: static void ip6_init2 __P((void *));
142:
1.5 itojun 143: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
1.62 itojun 144: static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));
1.2 itojun 145:
146: /*
147: * IP6 initialization: fill in IP6 protocol switch table.
148: * All protocols not implemented in kernel go to raw IP6 protocol handler.
149: */
150: void
151: ip6_init()
152: {
1.35 itojun 153: struct ip6protosw *pr;
154: int i;
1.2 itojun 155:
156: pr = (struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
157: if (pr == 0)
158: panic("ip6_init");
159: for (i = 0; i < IPPROTO_MAX; i++)
160: ip6_protox[i] = pr - inet6sw;
161: for (pr = (struct ip6protosw *)inet6domain.dom_protosw;
162: pr < (struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
163: if (pr->pr_domain->dom_family == PF_INET6 &&
164: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
165: ip6_protox[pr->pr_protocol] = pr - inet6sw;
166: ip6intrq.ifq_maxlen = ip6qmaxlen;
167: nd6_init();
168: frag6_init();
169:
170: ip6_init2((void *)0);
1.29 thorpej 171:
172: #ifdef PFIL_HOOKS
173: /* Register our Packet Filter hook. */
1.33 thorpej 174: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
175: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 176: i = pfil_head_register(&inet6_pfil_hook);
177: if (i != 0)
178: printf("ip6_init: WARNING: unable to register pfil hook, "
179: "error %d\n", i);
180: #endif /* PFIL_HOOKS */
1.2 itojun 181: }
182:
183: static void
184: ip6_init2(dummy)
185: void *dummy;
186: {
187:
188: /* nd6_timer_init */
1.19 thorpej 189: callout_init(&nd6_timer_ch);
190: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.2 itojun 191: }
192:
193: /*
194: * IP6 input interrupt handling. Just pass the packet to ip6_input.
195: */
196: void
197: ip6intr()
198: {
199: int s;
200: struct mbuf *m;
201:
202: for (;;) {
1.41 thorpej 203: s = splnet();
1.2 itojun 204: IF_DEQUEUE(&ip6intrq, m);
205: splx(s);
206: if (m == 0)
207: return;
208: ip6_input(m);
209: }
210: }
211:
212: extern struct route_in6 ip6_forward_rt;
213:
214: void
215: ip6_input(m)
216: struct mbuf *m;
217: {
1.9 itojun 218: struct ip6_hdr *ip6;
1.2 itojun 219: int off = sizeof(struct ip6_hdr), nest;
220: u_int32_t plen;
1.5 itojun 221: u_int32_t rtalert = ~0;
1.2 itojun 222: int nxt, ours = 0;
1.9 itojun 223: struct ifnet *deliverifp = NULL;
1.64 itojun 224: int srcrt = 0;
1.2 itojun 225:
226: #ifdef IPSEC
227: /*
228: * should the inner packet be considered authentic?
229: * see comment in ah4_input().
230: */
1.49 itojun 231: m->m_flags &= ~M_AUTHIPHDR;
232: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 233: #endif
1.9 itojun 234:
1.2 itojun 235: /*
1.44 itojun 236: * mbuf statistics
1.2 itojun 237: */
238: if (m->m_flags & M_EXT) {
239: if (m->m_next)
240: ip6stat.ip6s_mext2m++;
241: else
242: ip6stat.ip6s_mext1++;
243: } else {
1.40 itojun 244: #define M2MMAX (sizeof(ip6stat.ip6s_m2m)/sizeof(ip6stat.ip6s_m2m[0]))
1.2 itojun 245: if (m->m_next) {
1.9 itojun 246: if (m->m_flags & M_LOOP) {
1.77 peter 247: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 248: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 249: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
250: else
251: ip6stat.ip6s_m2m[0]++;
252: } else
253: ip6stat.ip6s_m1++;
1.40 itojun 254: #undef M2MMAX
1.2 itojun 255: }
256:
1.9 itojun 257: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
258: ip6stat.ip6s_total++;
259:
1.57 thorpej 260: /*
261: * If the IPv6 header is not aligned, slurp it up into a new
262: * mbuf with space for link headers, in the event we forward
263: * it. OTherwise, if it is aligned, make sure the entire base
264: * IPv6 header is in the first mbuf of the chain.
265: */
266: if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
267: struct ifnet *inifp = m->m_pkthdr.rcvif;
268: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
269: (max_linkhdr + 3) & ~3)) == NULL) {
270: /* XXXJRT new stat, please */
271: ip6stat.ip6s_toosmall++;
272: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
273: return;
274: }
275: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
276: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 277: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 278: ip6stat.ip6s_toosmall++;
279: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
280: return;
281: }
1.2 itojun 282: }
283:
284: ip6 = mtod(m, struct ip6_hdr *);
285:
286: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
287: ip6stat.ip6s_badvers++;
1.9 itojun 288: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 289: goto bad;
290: }
1.15 darrenr 291:
292: #ifdef PFIL_HOOKS
293: /*
294: * Run through list of hooks for input packets. If there are any
295: * filters which require that additional packets in the flow are
296: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
297: * Note that filters must _never_ set this flag, as another filter
298: * in the list may have previously cleared it.
299: */
1.39 itojun 300: /*
301: * let ipfilter look at packet on the wire,
302: * not the decapsulated packet.
303: */
304: #ifdef IPSEC
1.42 itojun 305: if (!ipsec_getnhist(m))
1.39 itojun 306: #else
307: if (1)
308: #endif
309: {
1.64 itojun 310: struct in6_addr odst;
311:
312: odst = ip6->ip6_dst;
1.39 itojun 313: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
314: PFIL_IN) != 0)
315: return;
316: if (m == NULL)
317: return;
318: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 319: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 320: }
1.15 darrenr 321: #endif /* PFIL_HOOKS */
322:
1.2 itojun 323: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
324:
1.30 thorpej 325: #ifdef ALTQ
326: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
327: /* packet is dropped by traffic conditioner */
328: return;
1.9 itojun 329: }
330: #endif
331:
1.2 itojun 332: /*
1.44 itojun 333: * Check against address spoofing/corruption.
1.2 itojun 334: */
335: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
336: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 337: /*
338: * XXX: "badscope" is not very suitable for a multicast source.
339: */
1.2 itojun 340: ip6stat.ip6s_badscope++;
1.9 itojun 341: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 342: goto bad;
343: }
1.13 itojun 344: /*
1.44 itojun 345: * The following check is not documented in specs. A malicious
346: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
347: * and bypass security checks (act as if it was from 127.0.0.1 by using
348: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 349: *
1.44 itojun 350: * This check chokes if we are in an SIIT cloud. As none of BSDs
351: * support IPv4-less kernel compilation, we cannot support SIIT
352: * environment at all. So, it makes more sense for us to reject any
353: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 354: * partial support for SIIT environment.
1.13 itojun 355: */
356: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
357: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
358: ip6stat.ip6s_badscope++;
359: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
360: goto bad;
361: }
1.17 itojun 362: #if 0
1.13 itojun 363: /*
1.17 itojun 364: * Reject packets with IPv4 compatible addresses (auto tunnel).
365: *
366: * The code forbids auto tunnel relay case in RFC1933 (the check is
367: * stronger than RFC1933). We may want to re-enable it if mech-xx
368: * is revised to forbid relaying case.
1.13 itojun 369: */
370: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
371: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
372: ip6stat.ip6s_badscope++;
373: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
374: goto bad;
375: }
376: #endif
1.35 itojun 377:
1.2 itojun 378: if (IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src) ||
379: IN6_IS_ADDR_LOOPBACK(&ip6->ip6_dst)) {
380: if (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) {
381: ours = 1;
1.9 itojun 382: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 383: goto hbhcheck;
384: } else {
385: ip6stat.ip6s_badscope++;
1.9 itojun 386: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 387: goto bad;
388: }
389: }
390:
1.38 itojun 391: /* drop packets if interface ID portion is already filled */
392: if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) {
393: if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src) &&
394: ip6->ip6_src.s6_addr16[1]) {
395: ip6stat.ip6s_badscope++;
396: goto bad;
397: }
398: if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst) &&
399: ip6->ip6_dst.s6_addr16[1]) {
400: ip6stat.ip6s_badscope++;
401: goto bad;
402: }
403: }
1.2 itojun 404:
1.40 itojun 405: if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src))
406: ip6->ip6_src.s6_addr16[1]
407: = htons(m->m_pkthdr.rcvif->if_index);
408: if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst))
409: ip6->ip6_dst.s6_addr16[1]
410: = htons(m->m_pkthdr.rcvif->if_index);
411:
412: /*
413: * We use rt->rt_ifp to determine if the address is ours or not.
414: * If rt_ifp is lo0, the address is ours.
415: * The problem here is, rt->rt_ifp for fe80::%lo0/64 is set to lo0,
416: * so any address under fe80::%lo0/64 will be mistakenly considered
417: * local. The special case is supplied to handle the case properly
418: * by actually looking at interface addresses
419: * (using in6ifa_ifpwithaddr).
420: */
421: if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) != 0 &&
422: IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) {
423: if (!in6ifa_ifpwithaddr(m->m_pkthdr.rcvif, &ip6->ip6_dst)) {
424: icmp6_error(m, ICMP6_DST_UNREACH,
425: ICMP6_DST_UNREACH_ADDR, 0);
426: /* m is already freed */
427: return;
1.21 itojun 428: }
1.40 itojun 429:
430: ours = 1;
431: deliverifp = m->m_pkthdr.rcvif;
432: goto hbhcheck;
1.9 itojun 433: }
434:
1.2 itojun 435: /*
436: * Multicast check
437: */
438: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
439: struct in6_multi *in6m = 0;
1.9 itojun 440:
441: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 442: /*
443: * See if we belong to the destination multicast group on the
444: * arrival interface.
445: */
446: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
447: if (in6m)
448: ours = 1;
449: else if (!ip6_mrouter) {
450: ip6stat.ip6s_notmember++;
451: ip6stat.ip6s_cantforward++;
1.9 itojun 452: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 453: goto bad;
454: }
1.9 itojun 455: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 456: goto hbhcheck;
457: }
458:
459: /*
460: * Unicast check
461: */
1.22 itojun 462: if (ip6_forward_rt.ro_rt != NULL &&
1.55 itojun 463: (ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 &&
1.22 itojun 464: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.72 itojun 465: &((struct sockaddr_in6 *)(&ip6_forward_rt.ro_dst))->sin6_addr))
1.25 itojun 466: ip6stat.ip6s_forward_cachehit++;
1.22 itojun 467: else {
1.35 itojun 468: struct sockaddr_in6 *dst6;
469:
1.2 itojun 470: if (ip6_forward_rt.ro_rt) {
1.22 itojun 471: /* route is down or destination is different */
1.25 itojun 472: ip6stat.ip6s_forward_cachemiss++;
1.2 itojun 473: RTFREE(ip6_forward_rt.ro_rt);
474: ip6_forward_rt.ro_rt = 0;
475: }
1.22 itojun 476:
1.2 itojun 477: bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6));
1.35 itojun 478: dst6 = (struct sockaddr_in6 *)&ip6_forward_rt.ro_dst;
479: dst6->sin6_len = sizeof(struct sockaddr_in6);
480: dst6->sin6_family = AF_INET6;
481: dst6->sin6_addr = ip6->ip6_dst;
1.2 itojun 482:
1.9 itojun 483: rtalloc((struct route *)&ip6_forward_rt);
1.2 itojun 484: }
485:
486: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
487:
488: /*
489: * Accept the packet if the forwarding interface to the destination
490: * according to the routing table is the loopback interface,
491: * unless the associated route has a gateway.
492: * Note that this approach causes to accept a packet if there is a
493: * route to the loopback interface for the destination of the packet.
494: * But we think it's even useful in some situations, e.g. when using
495: * a special daemon which wants to intercept the packet.
496: */
497: if (ip6_forward_rt.ro_rt &&
498: (ip6_forward_rt.ro_rt->rt_flags &
499: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55 itojun 500: !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2 itojun 501: #if 0
502: /*
503: * The check below is redundant since the comparison of
504: * the destination and the key of the rtentry has
505: * already done through looking up the routing table.
506: */
507: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55 itojun 508: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2 itojun 509: #endif
1.9 itojun 510: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 511: struct in6_ifaddr *ia6 =
512: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
513: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
514: m->m_flags |= M_ANYCAST6;
1.24 itojun 515: /*
516: * packets to a tentative, duplicated, or somehow invalid
517: * address must not be accepted.
518: */
1.2 itojun 519: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 520: /* this address is ready */
1.2 itojun 521: ours = 1;
1.9 itojun 522: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 523: goto hbhcheck;
524: } else {
1.24 itojun 525: /* address is not ready, so discard the packet. */
1.34 itojun 526: nd6log((LOG_INFO,
1.27 itojun 527: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 528: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 529: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 530:
531: goto bad;
1.2 itojun 532: }
533: }
534:
535: /*
1.55 itojun 536: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 537: */
538: #if defined(NFAITH) && 0 < NFAITH
539: if (ip6_keepfaith) {
1.71 itojun 540: if (ip6_forward_rt.ro_rt && ip6_forward_rt.ro_rt->rt_ifp &&
541: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 542: /* XXX do we need more sanity checks? */
543: ours = 1;
1.45 itojun 544: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 545: goto hbhcheck;
546: }
547: }
548: #endif
549:
550: #if 0
551: {
552: /*
553: * Last resort: check in6_ifaddr for incoming interface.
554: * The code is here until I update the "goto ours hack" code above
555: * working right.
556: */
557: struct ifaddr *ifa;
558: for (ifa = m->m_pkthdr.rcvif->if_addrlist.tqh_first;
559: ifa;
560: ifa = ifa->ifa_list.tqe_next) {
561: if (ifa->ifa_addr == NULL)
562: continue; /* just for safety */
563: if (ifa->ifa_addr->sa_family != AF_INET6)
564: continue;
565: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
566: ours = 1;
567: deliverifp = ifa->ifa_ifp;
1.2 itojun 568: goto hbhcheck;
569: }
570: }
1.9 itojun 571: }
1.2 itojun 572: #endif
573:
574: /*
575: * Now there is no reason to process the packet if it's not our own
576: * and we're not a router.
577: */
578: if (!ip6_forwarding) {
579: ip6stat.ip6s_cantforward++;
1.9 itojun 580: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 581: goto bad;
582: }
583:
584: hbhcheck:
585: /*
586: * Process Hop-by-Hop options header if it's contained.
587: * m may be modified in ip6_hopopts_input().
588: * If a JumboPayload option is included, plen will also be modified.
589: */
590: plen = (u_int32_t)ntohs(ip6->ip6_plen);
591: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 592: struct ip6_hbh *hbh;
593:
594: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
595: #if 0 /*touches NULL pointer*/
596: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
597: #endif
1.2 itojun 598: return; /* m have already been freed */
1.9 itojun 599: }
1.22 itojun 600:
1.2 itojun 601: /* adjust pointer */
602: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 603:
604: /*
1.49 itojun 605: * if the payload length field is 0 and the next header field
1.22 itojun 606: * indicates Hop-by-Hop Options header, then a Jumbo Payload
607: * option MUST be included.
608: */
609: if (ip6->ip6_plen == 0 && plen == 0) {
610: /*
611: * Note that if a valid jumbo payload option is
612: * contained, ip6_hoptops_input() must set a valid
1.55 itojun 613: * (non-zero) payload length to the variable plen.
1.22 itojun 614: */
615: ip6stat.ip6s_badoptions++;
616: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
617: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
618: icmp6_error(m, ICMP6_PARAM_PROB,
619: ICMP6_PARAMPROB_HEADER,
620: (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
621: return;
622: }
1.9 itojun 623: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
624: sizeof(struct ip6_hbh));
625: if (hbh == NULL) {
626: ip6stat.ip6s_tooshort++;
627: return;
628: }
1.57 thorpej 629: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 630: nxt = hbh->ip6h_nxt;
1.2 itojun 631:
632: /*
633: * accept the packet if a router alert option is included
634: * and we act as an IPv6 router.
635: */
1.5 itojun 636: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 637: ours = 1;
638: } else
639: nxt = ip6->ip6_nxt;
640:
641: /*
642: * Check that the amount of data in the buffers
643: * is as at least much as the IPv6 header would have us expect.
644: * Trim mbufs if longer than we expect.
645: * Drop packet if shorter than we expect.
646: */
647: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
648: ip6stat.ip6s_tooshort++;
1.9 itojun 649: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 650: goto bad;
651: }
652: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
653: if (m->m_len == m->m_pkthdr.len) {
654: m->m_len = sizeof(struct ip6_hdr) + plen;
655: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
656: } else
657: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
658: }
659:
660: /*
661: * Forward if desirable.
662: */
663: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
664: /*
665: * If we are acting as a multicast router, all
666: * incoming multicast packets are passed to the
667: * kernel-level multicast forwarding function.
668: * The packet is returned (relatively) intact; if
669: * ip6_mforward() returns a non-zero value, the packet
670: * must be discarded, else it may be accepted below.
671: */
672: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
673: ip6stat.ip6s_cantforward++;
674: m_freem(m);
675: return;
676: }
677: if (!ours) {
678: m_freem(m);
679: return;
680: }
1.22 itojun 681: } else if (!ours) {
1.64 itojun 682: ip6_forward(m, srcrt);
1.2 itojun 683: return;
1.56 itojun 684: }
1.25 itojun 685:
686: ip6 = mtod(m, struct ip6_hdr *);
687:
688: /*
689: * Malicious party may be able to use IPv4 mapped addr to confuse
690: * tcp/udp stack and bypass security checks (act as if it was from
691: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
692: *
693: * For SIIT end node behavior, you may want to disable the check.
694: * However, you will become vulnerable to attacks using IPv4 mapped
695: * source.
696: */
697: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
698: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
699: ip6stat.ip6s_badscope++;
700: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
701: goto bad;
702: }
1.2 itojun 703:
704: /*
705: * Tell launch routine the next header
706: */
1.12 itojun 707: #ifdef IFA_STATS
1.28 itojun 708: if (deliverifp != NULL) {
1.9 itojun 709: struct in6_ifaddr *ia6;
710: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
711: if (ia6)
712: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
713: }
714: #endif
1.2 itojun 715: ip6stat.ip6s_delivered++;
1.9 itojun 716: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 717: nest = 0;
1.40 itojun 718:
1.2 itojun 719: while (nxt != IPPROTO_DONE) {
720: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
721: ip6stat.ip6s_toomanyhdr++;
722: goto bad;
723: }
1.8 itojun 724:
725: /*
726: * protection against faulty packet - there should be
727: * more sanity checks in header chain processing.
728: */
729: if (m->m_pkthdr.len < off) {
730: ip6stat.ip6s_tooshort++;
1.9 itojun 731: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 732: goto bad;
733: }
734:
1.37 itojun 735: #ifdef IPSEC
736: /*
737: * enforce IPsec policy checking if we are seeing last header.
738: * note that we do not visit this with protocols with pcb layer
739: * code - like udp/tcp/raw ip.
740: */
741: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
742: ipsec6_in_reject(m, NULL)) {
743: ipsec6stat.in_polvio++;
744: goto bad;
745: }
746: #endif
1.56 itojun 747:
1.2 itojun 748: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
749: }
750: return;
751: bad:
752: m_freem(m);
753: }
754:
755: /*
756: * Hop-by-Hop options header processing. If a valid jumbo payload option is
757: * included, the real payload length will be stored in plenp.
758: */
759: static int
760: ip6_hopopts_input(plenp, rtalertp, mp, offp)
761: u_int32_t *plenp;
1.5 itojun 762: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 763: struct mbuf **mp;
764: int *offp;
765: {
1.35 itojun 766: struct mbuf *m = *mp;
1.2 itojun 767: int off = *offp, hbhlen;
768: struct ip6_hbh *hbh;
769:
770: /* validation of the length of the header */
1.9 itojun 771: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
772: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
773: if (hbh == NULL) {
774: ip6stat.ip6s_tooshort++;
775: return -1;
776: }
777: hbhlen = (hbh->ip6h_len + 1) << 3;
778: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
779: hbhlen);
780: if (hbh == NULL) {
781: ip6stat.ip6s_tooshort++;
782: return -1;
783: }
1.57 thorpej 784: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 785: off += hbhlen;
786: hbhlen -= sizeof(struct ip6_hbh);
787:
788: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
789: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 790: return (-1);
1.2 itojun 791:
792: *offp = off;
793: *mp = m;
1.58 itojun 794: return (0);
1.2 itojun 795: }
796:
797: /*
798: * Search header for all Hop-by-hop options and process each option.
799: * This function is separate from ip6_hopopts_input() in order to
800: * handle a case where the sending node itself process its hop-by-hop
801: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 802: *
803: * The function assumes that hbh header is located right after the IPv6 header
804: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
805: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 806: */
807: int
808: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
809: struct mbuf *m;
810: u_int8_t *opthead;
811: int hbhlen;
1.5 itojun 812: u_int32_t *rtalertp;
1.2 itojun 813: u_int32_t *plenp;
814: {
815: struct ip6_hdr *ip6;
816: int optlen = 0;
817: u_int8_t *opt = opthead;
818: u_int16_t rtalert_val;
1.22 itojun 819: u_int32_t jumboplen;
1.55 itojun 820: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 821:
822: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 823: switch (*opt) {
824: case IP6OPT_PAD1:
825: optlen = 1;
826: break;
827: case IP6OPT_PADN:
828: if (hbhlen < IP6OPT_MINLEN) {
829: ip6stat.ip6s_toosmall++;
830: goto bad;
831: }
832: optlen = *(opt + 1) + 2;
833: break;
834: case IP6OPT_RTALERT:
835: /* XXX may need check for alignment */
836: if (hbhlen < IP6OPT_RTALERT_LEN) {
837: ip6stat.ip6s_toosmall++;
838: goto bad;
839: }
840: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 841: /* XXX stat */
842: icmp6_error(m, ICMP6_PARAM_PROB,
843: ICMP6_PARAMPROB_HEADER,
844: erroff + opt + 1 - opthead);
845: return (-1);
1.35 itojun 846: }
847: optlen = IP6OPT_RTALERT_LEN;
848: bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
849: *rtalertp = ntohs(rtalert_val);
850: break;
851: case IP6OPT_JUMBO:
1.22 itojun 852: /* XXX may need check for alignment */
853: if (hbhlen < IP6OPT_JUMBO_LEN) {
854: ip6stat.ip6s_toosmall++;
855: goto bad;
856: }
1.35 itojun 857: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 858: /* XXX stat */
859: icmp6_error(m, ICMP6_PARAM_PROB,
860: ICMP6_PARAMPROB_HEADER,
861: erroff + opt + 1 - opthead);
862: return (-1);
1.35 itojun 863: }
1.22 itojun 864: optlen = IP6OPT_JUMBO_LEN;
865:
866: /*
867: * IPv6 packets that have non 0 payload length
1.35 itojun 868: * must not contain a jumbo payload option.
1.22 itojun 869: */
870: ip6 = mtod(m, struct ip6_hdr *);
871: if (ip6->ip6_plen) {
872: ip6stat.ip6s_badoptions++;
873: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 874: ICMP6_PARAMPROB_HEADER,
875: erroff + opt - opthead);
876: return (-1);
1.22 itojun 877: }
1.2 itojun 878:
1.22 itojun 879: /*
880: * We may see jumbolen in unaligned location, so
881: * we'd need to perform bcopy().
882: */
883: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
884: jumboplen = (u_int32_t)htonl(jumboplen);
885:
886: #if 1
887: /*
888: * if there are multiple jumbo payload options,
889: * *plenp will be non-zero and the packet will be
890: * rejected.
891: * the behavior may need some debate in ipngwg -
892: * multiple options does not make sense, however,
893: * there's no explicit mention in specification.
894: */
895: if (*plenp != 0) {
896: ip6stat.ip6s_badoptions++;
897: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 898: ICMP6_PARAMPROB_HEADER,
899: erroff + opt + 2 - opthead);
900: return (-1);
1.22 itojun 901: }
1.8 itojun 902: #endif
1.2 itojun 903:
1.22 itojun 904: /*
905: * jumbo payload length must be larger than 65535.
906: */
907: if (jumboplen <= IPV6_MAXPACKET) {
908: ip6stat.ip6s_badoptions++;
909: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 910: ICMP6_PARAMPROB_HEADER,
911: erroff + opt + 2 - opthead);
912: return (-1);
1.22 itojun 913: }
914: *plenp = jumboplen;
915:
916: break;
1.35 itojun 917: default: /* unknown option */
918: if (hbhlen < IP6OPT_MINLEN) {
919: ip6stat.ip6s_toosmall++;
920: goto bad;
921: }
1.55 itojun 922: optlen = ip6_unknown_opt(opt, m,
923: erroff + opt - opthead);
924: if (optlen == -1)
925: return (-1);
1.35 itojun 926: optlen += 2;
927: break;
1.2 itojun 928: }
929: }
930:
1.55 itojun 931: return (0);
1.2 itojun 932:
933: bad:
934: m_freem(m);
1.55 itojun 935: return (-1);
1.2 itojun 936: }
937:
938: /*
939: * Unknown option processing.
940: * The third argument `off' is the offset from the IPv6 header to the option,
941: * which is necessary if the IPv6 header the and option header and IPv6 header
942: * is not continuous in order to return an ICMPv6 error.
943: */
944: int
945: ip6_unknown_opt(optp, m, off)
946: u_int8_t *optp;
947: struct mbuf *m;
948: int off;
949: {
950: struct ip6_hdr *ip6;
951:
1.35 itojun 952: switch (IP6OPT_TYPE(*optp)) {
953: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 954: return ((int)*(optp + 1));
1.35 itojun 955: case IP6OPT_TYPE_DISCARD: /* silently discard */
956: m_freem(m);
1.58 itojun 957: return (-1);
1.35 itojun 958: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
959: ip6stat.ip6s_badoptions++;
960: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 961: return (-1);
1.35 itojun 962: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
963: ip6stat.ip6s_badoptions++;
964: ip6 = mtod(m, struct ip6_hdr *);
965: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
966: (m->m_flags & (M_BCAST|M_MCAST)))
967: m_freem(m);
968: else
969: icmp6_error(m, ICMP6_PARAM_PROB,
970: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 971: return (-1);
1.2 itojun 972: }
973:
974: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 975: return (-1);
1.2 itojun 976: }
977:
978: /*
1.9 itojun 979: * Create the "control" list for this pcb.
980: *
981: * The routine will be called from upper layer handlers like tcp6_input().
982: * Thus the routine assumes that the caller (tcp6_input) have already
983: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
984: * very first mbuf on the mbuf chain.
985: * We may want to add some infinite loop prevention or sanity checks for safety.
986: * (This applies only when you are using KAME mbuf chain restriction, i.e.
987: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 988: */
989: void
990: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 991: struct in6pcb *in6p;
992: struct mbuf **mp;
993: struct ip6_hdr *ip6;
994: struct mbuf *m;
1.2 itojun 995: {
1.9 itojun 996:
997: #ifdef SO_TIMESTAMP
1.2 itojun 998: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
999: struct timeval tv;
1000:
1001: microtime(&tv);
1002: *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
1.63 itojun 1003: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1004: if (*mp)
1005: mp = &(*mp)->m_next;
1006: }
1.9 itojun 1007: #endif
1.77.12.1! riz 1008:
! 1009: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
! 1010: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
! 1011: return;
! 1012:
1.2 itojun 1013: if (in6p->in6p_flags & IN6P_RECVDSTADDR) {
1014: *mp = sbcreatecontrol((caddr_t) &ip6->ip6_dst,
1.63 itojun 1015: sizeof(struct in6_addr), IPV6_RECVDSTADDR, IPPROTO_IPV6);
1.2 itojun 1016: if (*mp)
1017: mp = &(*mp)->m_next;
1018: }
1019:
1020: #ifdef noyet
1021: /* options were tossed above */
1022: if (in6p->in6p_flags & IN6P_RECVOPTS)
1023: /* broken */
1024: /* ip6_srcroute doesn't do what we want here, need to fix */
1025: if (in6p->in6p_flags & IPV6P_RECVRETOPTS)
1026: /* broken */
1027: #endif
1028:
1029: /* RFC 2292 sec. 5 */
1.35 itojun 1030: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1031: struct in6_pktinfo pi6;
1032: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1033: if (IN6_IS_SCOPE_LINKLOCAL(&pi6.ipi6_addr))
1034: pi6.ipi6_addr.s6_addr16[1] = 0;
1035: pi6.ipi6_ifindex = (m && m->m_pkthdr.rcvif)
1036: ? m->m_pkthdr.rcvif->if_index
1037: : 0;
1038: *mp = sbcreatecontrol((caddr_t) &pi6,
1.63 itojun 1039: sizeof(struct in6_pktinfo), IPV6_PKTINFO, IPPROTO_IPV6);
1.2 itojun 1040: if (*mp)
1041: mp = &(*mp)->m_next;
1042: }
1043: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1044: int hlim = ip6->ip6_hlim & 0xff;
1.63 itojun 1045: *mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),
1046: IPV6_HOPLIMIT, IPPROTO_IPV6);
1.2 itojun 1047: if (*mp)
1048: mp = &(*mp)->m_next;
1049: }
1050: /* IN6P_NEXTHOP - for outgoing packet only */
1051:
1052: /*
1.75 itojun 1053: * IPV6_HOPOPTS socket option. Recall that we required super-user
1054: * privilege for the option (see ip6_ctloutput), but it might be too
1055: * strict, since there might be some hop-by-hop options which can be
1056: * returned to normal user.
1057: * See also RFC 2292 section 6.
1.2 itojun 1058: */
1.75 itojun 1059: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1060: /*
1061: * Check if a hop-by-hop options header is contatined in the
1062: * received packet, and if so, store the options as ancillary
1063: * data. Note that a hop-by-hop options header must be
1064: * just after the IPv6 header, which fact is assured through
1065: * the IPv6 input processing.
1066: */
1067: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1068: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1069: struct ip6_hbh *hbh;
1070: int hbhlen;
1.62 itojun 1071: struct mbuf *ext;
1.9 itojun 1072:
1.62 itojun 1073: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1074: ip6->ip6_nxt);
1075: if (ext == NULL) {
1.9 itojun 1076: ip6stat.ip6s_tooshort++;
1077: return;
1078: }
1.62 itojun 1079: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1080: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1081: if (hbhlen != ext->m_len) {
1082: m_freem(ext);
1.9 itojun 1083: ip6stat.ip6s_tooshort++;
1084: return;
1085: }
1.2 itojun 1086:
1087: /*
1088: * XXX: We copy whole the header even if a jumbo
1089: * payload option is included, which option is to
1090: * be removed before returning in the RFC 2292.
1091: * But it's too painful operation...
1092: */
1.9 itojun 1093: *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
1.63 itojun 1094: IPV6_HOPOPTS, IPPROTO_IPV6);
1.2 itojun 1095: if (*mp)
1096: mp = &(*mp)->m_next;
1.62 itojun 1097: m_freem(ext);
1.2 itojun 1098: }
1099: }
1100:
1101: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1102: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1103: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1.60 simonb 1104: int nxt = ip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1105:
1106: /*
1107: * Search for destination options headers or routing
1108: * header(s) through the header chain, and stores each
1109: * header as ancillary data.
1110: * Note that the order of the headers remains in
1111: * the chain of ancillary data.
1112: */
1.35 itojun 1113: while (1) { /* is explicit loop prevention necessary? */
1.62 itojun 1114: struct ip6_ext *ip6e = NULL;
1.9 itojun 1115: int elen;
1.62 itojun 1116: struct mbuf *ext = NULL;
1.9 itojun 1117:
1.62 itojun 1118: /*
1119: * if it is not an extension header, don't try to
1120: * pull it from the chain.
1121: */
1122: switch (nxt) {
1123: case IPPROTO_DSTOPTS:
1124: case IPPROTO_ROUTING:
1125: case IPPROTO_HOPOPTS:
1126: case IPPROTO_AH: /* is it possible? */
1127: break;
1128: default:
1129: goto loopend;
1130: }
1131:
1132: ext = ip6_pullexthdr(m, off, nxt);
1133: if (ext == NULL) {
1.9 itojun 1134: ip6stat.ip6s_tooshort++;
1135: return;
1136: }
1.62 itojun 1137: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1138: if (nxt == IPPROTO_AH)
1139: elen = (ip6e->ip6e_len + 2) << 2;
1140: else
1141: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1142: if (elen != ext->m_len) {
1143: m_freem(ext);
1.9 itojun 1144: ip6stat.ip6s_tooshort++;
1145: return;
1146: }
1.57 thorpej 1147: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1148:
1.35 itojun 1149: switch (nxt) {
1.62 itojun 1150: case IPPROTO_DSTOPTS:
1.35 itojun 1151: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1152: break;
1153:
1154: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.63 itojun 1155: IPV6_DSTOPTS, IPPROTO_IPV6);
1.35 itojun 1156: if (*mp)
1157: mp = &(*mp)->m_next;
1158: break;
1159:
1160: case IPPROTO_ROUTING:
1161: if (!in6p->in6p_flags & IN6P_RTHDR)
1162: break;
1163:
1164: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.63 itojun 1165: IPV6_RTHDR, IPPROTO_IPV6);
1.35 itojun 1166: if (*mp)
1167: mp = &(*mp)->m_next;
1168: break;
1169:
1.62 itojun 1170: case IPPROTO_HOPOPTS:
1171: case IPPROTO_AH: /* is it possible? */
1172: break;
1173:
1.35 itojun 1174: default:
1175: /*
1.62 itojun 1176: * other cases have been filtered in the above.
1177: * none will visit this case. here we supply
1178: * the code just in case (nxt overwritten or
1179: * other cases).
1.35 itojun 1180: */
1.62 itojun 1181: m_freem(ext);
1.35 itojun 1182: goto loopend;
1183:
1.2 itojun 1184: }
1185:
1186: /* proceed with the next header. */
1.9 itojun 1187: off += elen;
1.2 itojun 1188: nxt = ip6e->ip6e_nxt;
1.62 itojun 1189: ip6e = NULL;
1190: m_freem(ext);
1191: ext = NULL;
1.2 itojun 1192: }
1193: loopend:
1.62 itojun 1194: ;
1.2 itojun 1195: }
1.62 itojun 1196: }
1197:
1198: /*
1199: * pull single extension header from mbuf chain. returns single mbuf that
1200: * contains the result, or NULL on error.
1201: */
1202: static struct mbuf *
1203: ip6_pullexthdr(m, off, nxt)
1204: struct mbuf *m;
1205: size_t off;
1206: int nxt;
1207: {
1208: struct ip6_ext ip6e;
1209: size_t elen;
1210: struct mbuf *n;
1211:
1212: #ifdef DIAGNOSTIC
1213: switch (nxt) {
1214: case IPPROTO_DSTOPTS:
1215: case IPPROTO_ROUTING:
1216: case IPPROTO_HOPOPTS:
1217: case IPPROTO_AH: /* is it possible? */
1218: break;
1219: default:
1220: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1221: }
1.62 itojun 1222: #endif
1.2 itojun 1223:
1.62 itojun 1224: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1225: if (nxt == IPPROTO_AH)
1226: elen = (ip6e.ip6e_len + 2) << 2;
1227: else
1228: elen = (ip6e.ip6e_len + 1) << 3;
1229:
1230: MGET(n, M_DONTWAIT, MT_DATA);
1231: if (n && elen >= MLEN) {
1232: MCLGET(n, M_DONTWAIT);
1233: if ((n->m_flags & M_EXT) == 0) {
1234: m_free(n);
1235: n = NULL;
1236: }
1237: }
1238: if (!n)
1239: return NULL;
1240:
1241: n->m_len = 0;
1242: if (elen >= M_TRAILINGSPACE(n)) {
1243: m_free(n);
1244: return NULL;
1245: }
1246:
1247: m_copydata(m, off, elen, mtod(n, caddr_t));
1248: n->m_len = elen;
1249: return n;
1.2 itojun 1250: }
1251:
1252: /*
1253: * Get pointer to the previous header followed by the header
1254: * currently processed.
1255: * XXX: This function supposes that
1256: * M includes all headers,
1257: * the next header field and the header length field of each header
1258: * are valid, and
1259: * the sum of each header length equals to OFF.
1260: * Because of these assumptions, this function must be called very
1261: * carefully. Moreover, it will not be used in the near future when
1262: * we develop `neater' mechanism to process extension headers.
1263: */
1.58 itojun 1264: u_int8_t *
1.2 itojun 1265: ip6_get_prevhdr(m, off)
1266: struct mbuf *m;
1267: int off;
1268: {
1269: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1270:
1271: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1272: return (&ip6->ip6_nxt);
1.2 itojun 1273: else {
1274: int len, nxt;
1275: struct ip6_ext *ip6e = NULL;
1276:
1277: nxt = ip6->ip6_nxt;
1278: len = sizeof(struct ip6_hdr);
1279: while (len < off) {
1280: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
1281:
1.35 itojun 1282: switch (nxt) {
1.2 itojun 1283: case IPPROTO_FRAGMENT:
1284: len += sizeof(struct ip6_frag);
1285: break;
1286: case IPPROTO_AH:
1287: len += (ip6e->ip6e_len + 2) << 2;
1288: break;
1289: default:
1290: len += (ip6e->ip6e_len + 1) << 3;
1291: break;
1292: }
1293: nxt = ip6e->ip6e_nxt;
1294: }
1295: if (ip6e)
1.58 itojun 1296: return (&ip6e->ip6e_nxt);
1.2 itojun 1297: else
1298: return NULL;
1.18 itojun 1299: }
1300: }
1301:
1302: /*
1303: * get next header offset. m will be retained.
1304: */
1305: int
1306: ip6_nexthdr(m, off, proto, nxtp)
1307: struct mbuf *m;
1308: int off;
1309: int proto;
1310: int *nxtp;
1311: {
1312: struct ip6_hdr ip6;
1313: struct ip6_ext ip6e;
1314: struct ip6_frag fh;
1315:
1316: /* just in case */
1317: if (m == NULL)
1318: panic("ip6_nexthdr: m == NULL");
1319: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1320: return -1;
1321:
1322: switch (proto) {
1323: case IPPROTO_IPV6:
1324: if (m->m_pkthdr.len < off + sizeof(ip6))
1325: return -1;
1326: m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
1327: if (nxtp)
1328: *nxtp = ip6.ip6_nxt;
1329: off += sizeof(ip6);
1330: return off;
1331:
1332: case IPPROTO_FRAGMENT:
1333: /*
1334: * terminate parsing if it is not the first fragment,
1335: * it does not make sense to parse through it.
1336: */
1337: if (m->m_pkthdr.len < off + sizeof(fh))
1338: return -1;
1339: m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
1.67 itojun 1340: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1341: return -1;
1342: if (nxtp)
1343: *nxtp = fh.ip6f_nxt;
1344: off += sizeof(struct ip6_frag);
1345: return off;
1346:
1347: case IPPROTO_AH:
1348: if (m->m_pkthdr.len < off + sizeof(ip6e))
1349: return -1;
1350: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1351: if (nxtp)
1352: *nxtp = ip6e.ip6e_nxt;
1353: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1354: if (m->m_pkthdr.len < off)
1355: return -1;
1.18 itojun 1356: return off;
1357:
1358: case IPPROTO_HOPOPTS:
1359: case IPPROTO_ROUTING:
1360: case IPPROTO_DSTOPTS:
1361: if (m->m_pkthdr.len < off + sizeof(ip6e))
1362: return -1;
1363: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1364: if (nxtp)
1365: *nxtp = ip6e.ip6e_nxt;
1366: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1367: if (m->m_pkthdr.len < off)
1368: return -1;
1.18 itojun 1369: return off;
1370:
1371: case IPPROTO_NONE:
1372: case IPPROTO_ESP:
1373: case IPPROTO_IPCOMP:
1374: /* give up */
1375: return -1;
1376:
1377: default:
1378: return -1;
1379: }
1380: }
1381:
1382: /*
1383: * get offset for the last header in the chain. m will be kept untainted.
1384: */
1385: int
1386: ip6_lasthdr(m, off, proto, nxtp)
1387: struct mbuf *m;
1388: int off;
1389: int proto;
1390: int *nxtp;
1391: {
1392: int newoff;
1393: int nxt;
1394:
1395: if (!nxtp) {
1396: nxt = -1;
1397: nxtp = &nxt;
1398: }
1399: while (1) {
1400: newoff = ip6_nexthdr(m, off, proto, nxtp);
1401: if (newoff < 0)
1402: return off;
1403: else if (newoff < off)
1404: return -1; /* invalid */
1405: else if (newoff == off)
1406: return newoff;
1407:
1408: off = newoff;
1409: proto = *nxtp;
1.2 itojun 1410: }
1411: }
1412:
1413: /*
1414: * System control for IP6
1415: */
1416:
1417: u_char inet6ctlerrmap[PRC_NCMDS] = {
1418: 0, 0, 0, 0,
1419: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1420: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1421: EMSGSIZE, EHOSTUNREACH, 0, 0,
1422: 0, 0, 0, 0,
1423: ENOPROTOOPT
1424: };
1425:
1.70 atatat 1426: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1427: {
1.26 itojun 1428:
1.73 atatat 1429: sysctl_createv(clog, 0, NULL, NULL,
1430: CTLFLAG_PERMANENT,
1.70 atatat 1431: CTLTYPE_NODE, "net", NULL,
1432: NULL, 0, NULL, 0,
1433: CTL_NET, CTL_EOL);
1.73 atatat 1434: sysctl_createv(clog, 0, NULL, NULL,
1435: CTLFLAG_PERMANENT,
1.74 atatat 1436: CTLTYPE_NODE, "inet6",
1437: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1438: NULL, 0, NULL, 0,
1439: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1440: sysctl_createv(clog, 0, NULL, NULL,
1441: CTLFLAG_PERMANENT,
1.74 atatat 1442: CTLTYPE_NODE, "ip6",
1443: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1444: NULL, 0, NULL, 0,
1445: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1446:
1.73 atatat 1447: sysctl_createv(clog, 0, NULL, NULL,
1448: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1449: CTLTYPE_INT, "forwarding",
1450: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1451: NULL, 0, &ip6_forwarding, 0,
1452: CTL_NET, PF_INET6, IPPROTO_IPV6,
1453: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1454: sysctl_createv(clog, 0, NULL, NULL,
1455: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1456: CTLTYPE_INT, "redirect",
1457: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1458: NULL, 0, &ip6_sendredirects, 0,
1459: CTL_NET, PF_INET6, IPPROTO_IPV6,
1460: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1461: sysctl_createv(clog, 0, NULL, NULL,
1462: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1463: CTLTYPE_INT, "hlim",
1464: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1465: NULL, 0, &ip6_defhlim, 0,
1466: CTL_NET, PF_INET6, IPPROTO_IPV6,
1467: IPV6CTL_DEFHLIM, CTL_EOL);
1468: #ifdef notyet
1.73 atatat 1469: sysctl_createv(clog, 0, NULL, NULL,
1470: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1471: CTLTYPE_INT, "mtu", NULL,
1472: NULL, 0, &, 0,
1473: CTL_NET, PF_INET6, IPPROTO_IPV6,
1474: IPV6CTL_DEFMTU, CTL_EOL);
1475: #endif
1476: #ifdef __no_idea__
1.73 atatat 1477: sysctl_createv(clog, 0, NULL, NULL,
1478: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1479: CTLTYPE_INT, "forwsrcrt", NULL,
1480: NULL, 0, &?, 0,
1481: CTL_NET, PF_INET6, IPPROTO_IPV6,
1482: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1483: sysctl_createv(clog, 0, NULL, NULL,
1484: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1485: CTLTYPE_STRUCT, "stats", NULL,
1486: NULL, 0, &?, sizeof(?),
1487: CTL_NET, PF_INET6, IPPROTO_IPV6,
1488: IPV6CTL_STATS, CTL_EOL);
1.73 atatat 1489: sysctl_createv(clog, 0, NULL, NULL,
1490: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1491: CTLTYPE_STRUCT, "mrtstats", NULL,
1492: NULL, 0, &?, sizeof(?),
1493: CTL_NET, PF_INET6, IPPROTO_IPV6,
1494: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1495: sysctl_createv(clog, 0, NULL, NULL,
1496: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1497: CTLTYPE_?, "mrtproto", NULL,
1498: NULL, 0, &?, sizeof(?),
1499: CTL_NET, PF_INET6, IPPROTO_IPV6,
1500: IPV6CTL_MRTPROTO, CTL_EOL);
1501: #endif
1.73 atatat 1502: sysctl_createv(clog, 0, NULL, NULL,
1503: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1504: CTLTYPE_INT, "maxfragpackets",
1505: SYSCTL_DESCR("Maximum number of fragments to buffer "
1506: "for reassembly"),
1.70 atatat 1507: NULL, 0, &ip6_maxfragpackets, 0,
1508: CTL_NET, PF_INET6, IPPROTO_IPV6,
1509: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1510: #ifdef __no_idea__
1.73 atatat 1511: sysctl_createv(clog, 0, NULL, NULL,
1512: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1513: CTLTYPE_INT, "sourcecheck", NULL,
1514: NULL, 0, &?, 0,
1515: CTL_NET, PF_INET6, IPPROTO_IPV6,
1516: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1517: sysctl_createv(clog, 0, NULL, NULL,
1518: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1519: CTLTYPE_INT, "sourcecheck_logint", NULL,
1520: NULL, 0, &?, 0,
1521: CTL_NET, PF_INET6, IPPROTO_IPV6,
1522: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1523: #endif
1.73 atatat 1524: sysctl_createv(clog, 0, NULL, NULL,
1525: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1526: CTLTYPE_INT, "accept_rtadv",
1527: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1528: NULL, 0, &ip6_accept_rtadv, 0,
1529: CTL_NET, PF_INET6, IPPROTO_IPV6,
1530: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1531: sysctl_createv(clog, 0, NULL, NULL,
1532: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1533: CTLTYPE_INT, "keepfaith",
1534: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1535: NULL, 0, &ip6_keepfaith, 0,
1536: CTL_NET, PF_INET6, IPPROTO_IPV6,
1537: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1538: sysctl_createv(clog, 0, NULL, NULL,
1539: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1540: CTLTYPE_INT, "log_interval",
1541: SYSCTL_DESCR("Minumum interval between logging "
1542: "unroutable packets"),
1.70 atatat 1543: NULL, 0, &ip6_log_interval, 0,
1544: CTL_NET, PF_INET6, IPPROTO_IPV6,
1545: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1546: sysctl_createv(clog, 0, NULL, NULL,
1547: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1548: CTLTYPE_INT, "hdrnestlimit",
1549: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1550: NULL, 0, &ip6_hdrnestlimit, 0,
1551: CTL_NET, PF_INET6, IPPROTO_IPV6,
1552: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1553: sysctl_createv(clog, 0, NULL, NULL,
1554: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1555: CTLTYPE_INT, "dad_count",
1556: SYSCTL_DESCR("Number of Duplicate Address Detection "
1557: "probes to send"),
1.70 atatat 1558: NULL, 0, &ip6_dad_count, 0,
1559: CTL_NET, PF_INET6, IPPROTO_IPV6,
1560: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1561: sysctl_createv(clog, 0, NULL, NULL,
1562: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1563: CTLTYPE_INT, "auto_flowlabel",
1564: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1565: NULL, 0, &ip6_auto_flowlabel, 0,
1566: CTL_NET, PF_INET6, IPPROTO_IPV6,
1567: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1568: sysctl_createv(clog, 0, NULL, NULL,
1569: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1570: CTLTYPE_INT, "defmcasthlim",
1571: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1572: NULL, 0, &ip6_defmcasthlim, 0,
1573: CTL_NET, PF_INET6, IPPROTO_IPV6,
1574: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1575: #if NGIF > 0
1.73 atatat 1576: sysctl_createv(clog, 0, NULL, NULL,
1577: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1578: CTLTYPE_INT, "gifhlim",
1579: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1580: NULL, 0, &ip6_gif_hlim, 0,
1581: CTL_NET, PF_INET6, IPPROTO_IPV6,
1582: IPV6CTL_GIF_HLIM, CTL_EOL);
1583: #endif /* NGIF */
1.73 atatat 1584: sysctl_createv(clog, 0, NULL, NULL,
1585: CTLFLAG_PERMANENT,
1.74 atatat 1586: CTLTYPE_STRING, "kame_version",
1587: SYSCTL_DESCR("KAME Version"),
1.70 atatat 1588: NULL, 0, __KAME_VERSION, 0,
1589: CTL_NET, PF_INET6, IPPROTO_IPV6,
1590: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1591: sysctl_createv(clog, 0, NULL, NULL,
1592: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1593: CTLTYPE_INT, "use_deprecated",
1594: SYSCTL_DESCR("Allow use of deprecated addresses as "
1595: "source addresses"),
1.70 atatat 1596: NULL, 0, &ip6_use_deprecated, 0,
1597: CTL_NET, PF_INET6, IPPROTO_IPV6,
1598: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1599: sysctl_createv(clog, 0, NULL, NULL,
1600: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1601: CTLTYPE_INT, "rr_prune", NULL,
1602: NULL, 0, &ip6_rr_prune, 0,
1603: CTL_NET, PF_INET6, IPPROTO_IPV6,
1604: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1605: sysctl_createv(clog, 0, NULL, NULL,
1606: CTLFLAG_PERMANENT
1.70 atatat 1607: #ifndef INET6_BINDV6ONLY
1.73 atatat 1608: |CTLFLAG_READWRITE,
1.70 atatat 1609: #endif
1.74 atatat 1610: CTLTYPE_INT, "v6only",
1611: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1612: "to PF_INET sockets"),
1.70 atatat 1613: NULL, 0, &ip6_v6only, 0,
1614: CTL_NET, PF_INET6, IPPROTO_IPV6,
1615: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1616: sysctl_createv(clog, 0, NULL, NULL,
1617: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1618: CTLTYPE_INT, "anonportmin",
1619: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1620: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1621: CTL_NET, PF_INET6, IPPROTO_IPV6,
1622: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1623: sysctl_createv(clog, 0, NULL, NULL,
1624: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1625: CTLTYPE_INT, "anonportmax",
1626: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1627: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1628: CTL_NET, PF_INET6, IPPROTO_IPV6,
1629: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1630: #ifndef IPNOPRIVPORTS
1.73 atatat 1631: sysctl_createv(clog, 0, NULL, NULL,
1632: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1633: CTLTYPE_INT, "lowportmin",
1634: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1635: "to assign"),
1.70 atatat 1636: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1637: CTL_NET, PF_INET6, IPPROTO_IPV6,
1638: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1639: sysctl_createv(clog, 0, NULL, NULL,
1640: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1641: CTLTYPE_INT, "lowportmax",
1642: SYSCTL_DESCR("Highest privileged ephemeral port number "
1643: "to assign"),
1.70 atatat 1644: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1645: CTL_NET, PF_INET6, IPPROTO_IPV6,
1646: IPV6CTL_LOWPORTMAX, CTL_EOL);
1647: #endif /* IPNOPRIVPORTS */
1.73 atatat 1648: sysctl_createv(clog, 0, NULL, NULL,
1649: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1650: CTLTYPE_INT, "maxfrags",
1651: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1652: NULL, 0, &ip6_maxfrags, 0,
1653: CTL_NET, PF_INET6, IPPROTO_IPV6,
1654: IPV6CTL_MAXFRAGS, CTL_EOL);
1.2 itojun 1655: }
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