Annotation of src/sys/netinet6/ip6_input.c, Revision 1.78.2.2
1.78.2.2! yamt 1: /* $NetBSD: ip6_input.c,v 1.78.2.1 2006/06/21 15:11:08 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>
1.78.2.2! yamt 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.78.2.1 2006/06/21 15:11:08 yamt Exp $");
1.2 itojun 66:
67: #include "opt_inet.h"
1.78.2.1 yamt 68: #include "opt_inet6.h"
1.4 thorpej 69: #include "opt_ipsec.h"
1.15 darrenr 70: #include "opt_pfil_hooks.h"
1.2 itojun 71:
72: #include <sys/param.h>
73: #include <sys/systm.h>
74: #include <sys/malloc.h>
75: #include <sys/mbuf.h>
76: #include <sys/domain.h>
77: #include <sys/protosw.h>
78: #include <sys/socket.h>
79: #include <sys/socketvar.h>
80: #include <sys/errno.h>
81: #include <sys/time.h>
82: #include <sys/kernel.h>
83: #include <sys/syslog.h>
84: #include <sys/proc.h>
1.46 simonb 85: #include <sys/sysctl.h>
1.2 itojun 86:
87: #include <net/if.h>
88: #include <net/if_types.h>
89: #include <net/if_dl.h>
90: #include <net/route.h>
91: #include <net/netisr.h>
1.15 darrenr 92: #ifdef PFIL_HOOKS
93: #include <net/pfil.h>
94: #endif
1.2 itojun 95:
96: #include <netinet/in.h>
1.9 itojun 97: #include <netinet/in_systm.h>
98: #ifdef INET
99: #include <netinet/ip.h>
100: #include <netinet/ip_icmp.h>
1.45 itojun 101: #endif /* INET */
1.14 itojun 102: #include <netinet/ip6.h>
1.2 itojun 103: #include <netinet6/in6_var.h>
1.11 itojun 104: #include <netinet6/ip6_var.h>
1.2 itojun 105: #include <netinet6/in6_pcb.h>
1.14 itojun 106: #include <netinet/icmp6.h>
1.78.2.1 yamt 107: #include <netinet6/scope6_var.h>
1.2 itojun 108: #include <netinet6/in6_ifattach.h>
109: #include <netinet6/nd6.h>
110:
1.37 itojun 111: #ifdef IPSEC
112: #include <netinet6/ipsec.h>
113: #endif
114:
1.2 itojun 115: #include <netinet6/ip6protosw.h>
116:
117: #include "faith.h"
118: #include "gif.h"
1.50 itojun 119:
120: #if NGIF > 0
121: #include <netinet6/in6_gif.h>
122: #endif
1.2 itojun 123:
1.9 itojun 124: #include <net/net_osdep.h>
125:
1.2 itojun 126: extern struct domain inet6domain;
127:
128: u_char ip6_protox[IPPROTO_MAX];
129: static int ip6qmaxlen = IFQ_MAXLEN;
130: struct in6_ifaddr *in6_ifaddr;
131: struct ifqueue ip6intrq;
132:
1.78.2.1 yamt 133: extern struct callout in6_tmpaddrtimer_ch;
134:
1.2 itojun 135: int ip6_forward_srcrt; /* XXX */
136: int ip6_sourcecheck; /* XXX */
137: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 138:
1.29 thorpej 139: #ifdef PFIL_HOOKS
140: struct pfil_head inet6_pfil_hook;
141: #endif
142:
1.2 itojun 143: struct ip6stat ip6stat;
144:
145: static void ip6_init2 __P((void *));
1.78.2.1 yamt 146: static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *));
1.2 itojun 147:
1.5 itojun 148: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
1.62 itojun 149: static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));
1.2 itojun 150:
151: /*
152: * IP6 initialization: fill in IP6 protocol switch table.
153: * All protocols not implemented in kernel go to raw IP6 protocol handler.
154: */
155: void
156: ip6_init()
157: {
1.78 christos 158: const struct ip6protosw *pr;
1.35 itojun 159: int i;
1.2 itojun 160:
1.78 christos 161: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 162: if (pr == 0)
163: panic("ip6_init");
164: for (i = 0; i < IPPROTO_MAX; i++)
165: ip6_protox[i] = pr - inet6sw;
1.78 christos 166: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
167: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 168: if (pr->pr_domain->dom_family == PF_INET6 &&
169: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
170: ip6_protox[pr->pr_protocol] = pr - inet6sw;
171: ip6intrq.ifq_maxlen = ip6qmaxlen;
1.78.2.1 yamt 172: scope6_init();
173: addrsel_policy_init();
1.2 itojun 174: nd6_init();
175: frag6_init();
1.78.2.1 yamt 176: ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 177:
178: ip6_init2((void *)0);
1.29 thorpej 179:
180: #ifdef PFIL_HOOKS
181: /* Register our Packet Filter hook. */
1.33 thorpej 182: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
183: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 184: i = pfil_head_register(&inet6_pfil_hook);
185: if (i != 0)
186: printf("ip6_init: WARNING: unable to register pfil hook, "
187: "error %d\n", i);
188: #endif /* PFIL_HOOKS */
1.2 itojun 189: }
190:
191: static void
1.78.2.2! yamt 192: ip6_init2(void *dummy)
1.2 itojun 193: {
194:
195: /* nd6_timer_init */
1.19 thorpej 196: callout_init(&nd6_timer_ch);
197: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.78.2.1 yamt 198:
199: /* timer for regeneranation of temporary addresses randomize ID */
200: callout_init(&in6_tmpaddrtimer_ch);
201: callout_reset(&in6_tmpaddrtimer_ch,
202: (ip6_temp_preferred_lifetime - ip6_desync_factor -
203: ip6_temp_regen_advance) * hz,
204: in6_tmpaddrtimer, NULL);
1.2 itojun 205: }
206:
207: /*
208: * IP6 input interrupt handling. Just pass the packet to ip6_input.
209: */
210: void
211: ip6intr()
212: {
213: int s;
214: struct mbuf *m;
215:
216: for (;;) {
1.41 thorpej 217: s = splnet();
1.2 itojun 218: IF_DEQUEUE(&ip6intrq, m);
219: splx(s);
220: if (m == 0)
221: return;
1.78.2.1 yamt 222: /* drop the packet if IPv6 operation is disabled on the IF */
223: if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {
224: m_freem(m);
225: return;
226: }
1.2 itojun 227: ip6_input(m);
228: }
229: }
230:
231: extern struct route_in6 ip6_forward_rt;
232:
233: void
234: ip6_input(m)
235: struct mbuf *m;
236: {
1.9 itojun 237: struct ip6_hdr *ip6;
1.2 itojun 238: int off = sizeof(struct ip6_hdr), nest;
239: u_int32_t plen;
1.5 itojun 240: u_int32_t rtalert = ~0;
1.2 itojun 241: int nxt, ours = 0;
1.9 itojun 242: struct ifnet *deliverifp = NULL;
1.64 itojun 243: int srcrt = 0;
1.2 itojun 244:
245: #ifdef IPSEC
246: /*
247: * should the inner packet be considered authentic?
248: * see comment in ah4_input().
249: */
1.49 itojun 250: m->m_flags &= ~M_AUTHIPHDR;
251: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 252: #endif
1.9 itojun 253:
1.2 itojun 254: /*
1.78.2.1 yamt 255: * make sure we don't have onion peering information into m_tag.
256: */
257: ip6_delaux(m);
258:
259: /*
1.44 itojun 260: * mbuf statistics
1.2 itojun 261: */
262: if (m->m_flags & M_EXT) {
263: if (m->m_next)
264: ip6stat.ip6s_mext2m++;
265: else
266: ip6stat.ip6s_mext1++;
267: } else {
1.40 itojun 268: #define M2MMAX (sizeof(ip6stat.ip6s_m2m)/sizeof(ip6stat.ip6s_m2m[0]))
1.2 itojun 269: if (m->m_next) {
1.9 itojun 270: if (m->m_flags & M_LOOP) {
1.77 peter 271: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40 itojun 272: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 273: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
274: else
275: ip6stat.ip6s_m2m[0]++;
276: } else
277: ip6stat.ip6s_m1++;
1.40 itojun 278: #undef M2MMAX
1.2 itojun 279: }
280:
1.9 itojun 281: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
282: ip6stat.ip6s_total++;
283:
1.57 thorpej 284: /*
285: * If the IPv6 header is not aligned, slurp it up into a new
286: * mbuf with space for link headers, in the event we forward
1.78.2.1 yamt 287: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 288: * IPv6 header is in the first mbuf of the chain.
289: */
290: if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
291: struct ifnet *inifp = m->m_pkthdr.rcvif;
292: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
293: (max_linkhdr + 3) & ~3)) == NULL) {
294: /* XXXJRT new stat, please */
295: ip6stat.ip6s_toosmall++;
296: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
297: return;
298: }
299: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
300: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 301: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 302: ip6stat.ip6s_toosmall++;
303: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
304: return;
305: }
1.2 itojun 306: }
307:
308: ip6 = mtod(m, struct ip6_hdr *);
309:
310: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
311: ip6stat.ip6s_badvers++;
1.9 itojun 312: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 313: goto bad;
314: }
1.15 darrenr 315:
316: #ifdef PFIL_HOOKS
317: /*
318: * Run through list of hooks for input packets. If there are any
319: * filters which require that additional packets in the flow are
320: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
321: * Note that filters must _never_ set this flag, as another filter
322: * in the list may have previously cleared it.
323: */
1.39 itojun 324: /*
325: * let ipfilter look at packet on the wire,
326: * not the decapsulated packet.
327: */
328: #ifdef IPSEC
1.42 itojun 329: if (!ipsec_getnhist(m))
1.39 itojun 330: #else
331: if (1)
332: #endif
333: {
1.64 itojun 334: struct in6_addr odst;
335:
336: odst = ip6->ip6_dst;
1.39 itojun 337: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
338: PFIL_IN) != 0)
339: return;
340: if (m == NULL)
341: return;
342: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 343: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 344: }
1.15 darrenr 345: #endif /* PFIL_HOOKS */
346:
1.2 itojun 347: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
348:
1.30 thorpej 349: #ifdef ALTQ
350: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
351: /* packet is dropped by traffic conditioner */
352: return;
1.9 itojun 353: }
354: #endif
355:
1.2 itojun 356: /*
1.44 itojun 357: * Check against address spoofing/corruption.
1.2 itojun 358: */
359: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
360: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 361: /*
362: * XXX: "badscope" is not very suitable for a multicast source.
363: */
1.2 itojun 364: ip6stat.ip6s_badscope++;
1.9 itojun 365: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 366: goto bad;
367: }
1.13 itojun 368: /*
1.44 itojun 369: * The following check is not documented in specs. A malicious
370: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
371: * and bypass security checks (act as if it was from 127.0.0.1 by using
372: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 373: *
1.44 itojun 374: * This check chokes if we are in an SIIT cloud. As none of BSDs
375: * support IPv4-less kernel compilation, we cannot support SIIT
376: * environment at all. So, it makes more sense for us to reject any
377: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 378: * partial support for SIIT environment.
1.13 itojun 379: */
380: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
381: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
382: ip6stat.ip6s_badscope++;
383: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
384: goto bad;
385: }
1.17 itojun 386: #if 0
1.13 itojun 387: /*
1.17 itojun 388: * Reject packets with IPv4 compatible addresses (auto tunnel).
389: *
390: * The code forbids auto tunnel relay case in RFC1933 (the check is
391: * stronger than RFC1933). We may want to re-enable it if mech-xx
392: * is revised to forbid relaying case.
1.13 itojun 393: */
394: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
395: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
396: ip6stat.ip6s_badscope++;
397: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
398: goto bad;
399: }
400: #endif
1.35 itojun 401:
1.78.2.1 yamt 402: /*
403: * Disambiguate address scope zones (if there is ambiguity).
404: * We first make sure that the original source or destination address
405: * is not in our internal form for scoped addresses. Such addresses
406: * are not necessarily invalid spec-wise, but we cannot accept them due
407: * to the usage conflict.
408: * in6_setscope() then also checks and rejects the cases where src or
409: * dst are the loopback address and the receiving interface
410: * is not loopback.
411: */
412: if (__predict_false(
413: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
414: goto bad;
415: ip6 = mtod(m, struct ip6_hdr *);
416: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
417: ip6stat.ip6s_badscope++; /* XXX */
418: goto bad;
1.38 itojun 419: }
1.78.2.1 yamt 420: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
421: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
422: ip6stat.ip6s_badscope++;
423: goto bad;
1.9 itojun 424: }
425:
1.2 itojun 426: /*
427: * Multicast check
428: */
429: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
430: struct in6_multi *in6m = 0;
1.9 itojun 431:
432: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 433: /*
434: * See if we belong to the destination multicast group on the
435: * arrival interface.
436: */
437: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
438: if (in6m)
439: ours = 1;
440: else if (!ip6_mrouter) {
441: ip6stat.ip6s_notmember++;
442: ip6stat.ip6s_cantforward++;
1.9 itojun 443: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 444: goto bad;
445: }
1.9 itojun 446: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 447: goto hbhcheck;
448: }
449:
450: /*
451: * Unicast check
452: */
1.78.2.2! yamt 453: if (!IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.72 itojun 454: &((struct sockaddr_in6 *)(&ip6_forward_rt.ro_dst))->sin6_addr))
1.78.2.2! yamt 455: rtcache_free((struct route *)&ip6_forward_rt);
! 456: else
! 457: rtcache_check((struct route *)&ip6_forward_rt);
! 458: if (ip6_forward_rt.ro_rt != NULL) {
! 459: /* XXX Revalidated route is accounted wrongly. */
1.25 itojun 460: ip6stat.ip6s_forward_cachehit++;
1.78.2.2! yamt 461: } else {
1.35 itojun 462: struct sockaddr_in6 *dst6;
463:
1.78.2.2! yamt 464: ip6stat.ip6s_forward_cachemiss++;
1.22 itojun 465:
1.2 itojun 466: bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6));
1.35 itojun 467: dst6 = (struct sockaddr_in6 *)&ip6_forward_rt.ro_dst;
468: dst6->sin6_len = sizeof(struct sockaddr_in6);
469: dst6->sin6_family = AF_INET6;
470: dst6->sin6_addr = ip6->ip6_dst;
1.2 itojun 471:
1.78.2.2! yamt 472: rtcache_init((struct route *)&ip6_forward_rt);
1.2 itojun 473: }
474:
475: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
476:
477: /*
478: * Accept the packet if the forwarding interface to the destination
479: * according to the routing table is the loopback interface,
480: * unless the associated route has a gateway.
481: * Note that this approach causes to accept a packet if there is a
482: * route to the loopback interface for the destination of the packet.
483: * But we think it's even useful in some situations, e.g. when using
484: * a special daemon which wants to intercept the packet.
485: */
1.78.2.2! yamt 486: if (ip6_forward_rt.ro_rt != NULL &&
1.2 itojun 487: (ip6_forward_rt.ro_rt->rt_flags &
488: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55 itojun 489: !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2 itojun 490: #if 0
491: /*
492: * The check below is redundant since the comparison of
493: * the destination and the key of the rtentry has
494: * already done through looking up the routing table.
495: */
496: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55 itojun 497: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2 itojun 498: #endif
1.9 itojun 499: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 500: struct in6_ifaddr *ia6 =
501: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
502: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
503: m->m_flags |= M_ANYCAST6;
1.24 itojun 504: /*
505: * packets to a tentative, duplicated, or somehow invalid
506: * address must not be accepted.
507: */
1.2 itojun 508: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 509: /* this address is ready */
1.2 itojun 510: ours = 1;
1.9 itojun 511: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 512: goto hbhcheck;
513: } else {
1.24 itojun 514: /* address is not ready, so discard the packet. */
1.34 itojun 515: nd6log((LOG_INFO,
1.27 itojun 516: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 517: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 518: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 519:
520: goto bad;
1.2 itojun 521: }
522: }
523:
524: /*
1.55 itojun 525: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 526: */
527: #if defined(NFAITH) && 0 < NFAITH
528: if (ip6_keepfaith) {
1.78.2.2! yamt 529: if (ip6_forward_rt.ro_rt != NULL &&
! 530: ip6_forward_rt.ro_rt->rt_ifp != NULL &&
1.71 itojun 531: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 532: /* XXX do we need more sanity checks? */
533: ours = 1;
1.45 itojun 534: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 535: goto hbhcheck;
536: }
537: }
538: #endif
539:
540: #if 0
541: {
542: /*
543: * Last resort: check in6_ifaddr for incoming interface.
544: * The code is here until I update the "goto ours hack" code above
545: * working right.
546: */
547: struct ifaddr *ifa;
1.78.2.2! yamt 548: TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) {
1.9 itojun 549: if (ifa->ifa_addr == NULL)
550: continue; /* just for safety */
551: if (ifa->ifa_addr->sa_family != AF_INET6)
552: continue;
553: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
554: ours = 1;
555: deliverifp = ifa->ifa_ifp;
1.2 itojun 556: goto hbhcheck;
557: }
558: }
1.9 itojun 559: }
1.2 itojun 560: #endif
561:
562: /*
563: * Now there is no reason to process the packet if it's not our own
564: * and we're not a router.
565: */
566: if (!ip6_forwarding) {
567: ip6stat.ip6s_cantforward++;
1.9 itojun 568: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 569: goto bad;
570: }
571:
572: hbhcheck:
573: /*
1.78.2.1 yamt 574: * record address information into m_tag, if we don't have one yet.
575: * note that we are unable to record it, if the address is not listed
576: * as our interface address (e.g. multicast addresses, addresses
577: * within FAITH prefixes and such).
578: */
579: if (deliverifp && !ip6_getdstifaddr(m)) {
580: struct in6_ifaddr *ia6;
581:
582: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
583: if (ia6) {
584: if (!ip6_setdstifaddr(m, ia6)) {
585: /*
586: * XXX maybe we should drop the packet here,
587: * as we could not provide enough information
588: * to the upper layers.
589: */
590: }
591: }
592: }
593:
594: /*
1.2 itojun 595: * Process Hop-by-Hop options header if it's contained.
596: * m may be modified in ip6_hopopts_input().
597: * If a JumboPayload option is included, plen will also be modified.
598: */
599: plen = (u_int32_t)ntohs(ip6->ip6_plen);
600: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 601: struct ip6_hbh *hbh;
602:
603: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
604: #if 0 /*touches NULL pointer*/
605: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
606: #endif
1.2 itojun 607: return; /* m have already been freed */
1.9 itojun 608: }
1.22 itojun 609:
1.2 itojun 610: /* adjust pointer */
611: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 612:
613: /*
1.49 itojun 614: * if the payload length field is 0 and the next header field
1.22 itojun 615: * indicates Hop-by-Hop Options header, then a Jumbo Payload
616: * option MUST be included.
617: */
618: if (ip6->ip6_plen == 0 && plen == 0) {
619: /*
620: * Note that if a valid jumbo payload option is
1.78.2.1 yamt 621: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 622: * (non-zero) payload length to the variable plen.
1.22 itojun 623: */
624: ip6stat.ip6s_badoptions++;
625: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
626: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
627: icmp6_error(m, ICMP6_PARAM_PROB,
628: ICMP6_PARAMPROB_HEADER,
629: (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
630: return;
631: }
1.9 itojun 632: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
633: sizeof(struct ip6_hbh));
634: if (hbh == NULL) {
635: ip6stat.ip6s_tooshort++;
636: return;
637: }
1.57 thorpej 638: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 639: nxt = hbh->ip6h_nxt;
1.2 itojun 640:
641: /*
642: * accept the packet if a router alert option is included
643: * and we act as an IPv6 router.
644: */
1.5 itojun 645: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 646: ours = 1;
647: } else
648: nxt = ip6->ip6_nxt;
649:
650: /*
651: * Check that the amount of data in the buffers
652: * is as at least much as the IPv6 header would have us expect.
653: * Trim mbufs if longer than we expect.
654: * Drop packet if shorter than we expect.
655: */
656: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
657: ip6stat.ip6s_tooshort++;
1.9 itojun 658: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 659: goto bad;
660: }
661: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
662: if (m->m_len == m->m_pkthdr.len) {
663: m->m_len = sizeof(struct ip6_hdr) + plen;
664: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
665: } else
666: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
667: }
668:
669: /*
670: * Forward if desirable.
671: */
672: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
673: /*
674: * If we are acting as a multicast router, all
675: * incoming multicast packets are passed to the
676: * kernel-level multicast forwarding function.
677: * The packet is returned (relatively) intact; if
678: * ip6_mforward() returns a non-zero value, the packet
679: * must be discarded, else it may be accepted below.
680: */
681: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
682: ip6stat.ip6s_cantforward++;
683: m_freem(m);
684: return;
685: }
686: if (!ours) {
687: m_freem(m);
688: return;
689: }
1.22 itojun 690: } else if (!ours) {
1.64 itojun 691: ip6_forward(m, srcrt);
1.2 itojun 692: return;
1.56 itojun 693: }
1.25 itojun 694:
695: ip6 = mtod(m, struct ip6_hdr *);
696:
697: /*
698: * Malicious party may be able to use IPv4 mapped addr to confuse
699: * tcp/udp stack and bypass security checks (act as if it was from
700: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
701: *
702: * For SIIT end node behavior, you may want to disable the check.
703: * However, you will become vulnerable to attacks using IPv4 mapped
704: * source.
705: */
706: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
707: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
708: ip6stat.ip6s_badscope++;
709: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
710: goto bad;
711: }
1.2 itojun 712:
713: /*
714: * Tell launch routine the next header
715: */
1.12 itojun 716: #ifdef IFA_STATS
1.28 itojun 717: if (deliverifp != NULL) {
1.9 itojun 718: struct in6_ifaddr *ia6;
719: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
720: if (ia6)
721: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
722: }
723: #endif
1.2 itojun 724: ip6stat.ip6s_delivered++;
1.9 itojun 725: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 726: nest = 0;
1.40 itojun 727:
1.2 itojun 728: while (nxt != IPPROTO_DONE) {
729: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
730: ip6stat.ip6s_toomanyhdr++;
731: goto bad;
732: }
1.8 itojun 733:
734: /*
735: * protection against faulty packet - there should be
736: * more sanity checks in header chain processing.
737: */
738: if (m->m_pkthdr.len < off) {
739: ip6stat.ip6s_tooshort++;
1.9 itojun 740: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 741: goto bad;
742: }
743:
1.37 itojun 744: #ifdef IPSEC
745: /*
746: * enforce IPsec policy checking if we are seeing last header.
747: * note that we do not visit this with protocols with pcb layer
748: * code - like udp/tcp/raw ip.
749: */
750: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
751: ipsec6_in_reject(m, NULL)) {
752: ipsec6stat.in_polvio++;
753: goto bad;
754: }
755: #endif
1.56 itojun 756:
1.2 itojun 757: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
758: }
759: return;
760: bad:
761: m_freem(m);
762: }
763:
764: /*
1.78.2.1 yamt 765: * set/grab in6_ifaddr correspond to IPv6 destination address.
766: */
767: static struct m_tag *
768: ip6_setdstifaddr(m, ia6)
769: struct mbuf *m;
770: struct in6_ifaddr *ia6;
771: {
772: struct m_tag *mtag;
773:
774: mtag = ip6_addaux(m);
775: if (mtag)
776: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
777: return mtag; /* NULL if failed to set */
778: }
779:
780: struct in6_ifaddr *
781: ip6_getdstifaddr(m)
782: struct mbuf *m;
783: {
784: struct m_tag *mtag;
785:
786: mtag = ip6_findaux(m);
787: if (mtag)
788: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
789: else
790: return NULL;
791: }
792:
793: /*
1.2 itojun 794: * Hop-by-Hop options header processing. If a valid jumbo payload option is
795: * included, the real payload length will be stored in plenp.
796: */
797: static int
798: ip6_hopopts_input(plenp, rtalertp, mp, offp)
799: u_int32_t *plenp;
1.5 itojun 800: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 801: struct mbuf **mp;
802: int *offp;
803: {
1.35 itojun 804: struct mbuf *m = *mp;
1.2 itojun 805: int off = *offp, hbhlen;
806: struct ip6_hbh *hbh;
807:
808: /* validation of the length of the header */
1.9 itojun 809: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
810: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
811: if (hbh == NULL) {
812: ip6stat.ip6s_tooshort++;
813: return -1;
814: }
815: hbhlen = (hbh->ip6h_len + 1) << 3;
816: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
817: hbhlen);
818: if (hbh == NULL) {
819: ip6stat.ip6s_tooshort++;
820: return -1;
821: }
1.57 thorpej 822: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 823: off += hbhlen;
824: hbhlen -= sizeof(struct ip6_hbh);
825:
826: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
827: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 828: return (-1);
1.2 itojun 829:
830: *offp = off;
831: *mp = m;
1.58 itojun 832: return (0);
1.2 itojun 833: }
834:
835: /*
836: * Search header for all Hop-by-hop options and process each option.
837: * This function is separate from ip6_hopopts_input() in order to
838: * handle a case where the sending node itself process its hop-by-hop
839: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 840: *
841: * The function assumes that hbh header is located right after the IPv6 header
842: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
843: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 844: */
845: int
846: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
847: struct mbuf *m;
848: u_int8_t *opthead;
849: int hbhlen;
1.5 itojun 850: u_int32_t *rtalertp;
1.2 itojun 851: u_int32_t *plenp;
852: {
853: struct ip6_hdr *ip6;
854: int optlen = 0;
855: u_int8_t *opt = opthead;
856: u_int16_t rtalert_val;
1.22 itojun 857: u_int32_t jumboplen;
1.55 itojun 858: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 859:
860: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 861: switch (*opt) {
862: case IP6OPT_PAD1:
863: optlen = 1;
864: break;
865: case IP6OPT_PADN:
866: if (hbhlen < IP6OPT_MINLEN) {
867: ip6stat.ip6s_toosmall++;
868: goto bad;
869: }
870: optlen = *(opt + 1) + 2;
871: break;
872: case IP6OPT_RTALERT:
873: /* XXX may need check for alignment */
874: if (hbhlen < IP6OPT_RTALERT_LEN) {
875: ip6stat.ip6s_toosmall++;
876: goto bad;
877: }
878: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 879: /* XXX stat */
880: icmp6_error(m, ICMP6_PARAM_PROB,
881: ICMP6_PARAMPROB_HEADER,
882: erroff + opt + 1 - opthead);
883: return (-1);
1.35 itojun 884: }
885: optlen = IP6OPT_RTALERT_LEN;
886: bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
887: *rtalertp = ntohs(rtalert_val);
888: break;
889: case IP6OPT_JUMBO:
1.22 itojun 890: /* XXX may need check for alignment */
891: if (hbhlen < IP6OPT_JUMBO_LEN) {
892: ip6stat.ip6s_toosmall++;
893: goto bad;
894: }
1.35 itojun 895: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 896: /* XXX stat */
897: icmp6_error(m, ICMP6_PARAM_PROB,
898: ICMP6_PARAMPROB_HEADER,
899: erroff + opt + 1 - opthead);
900: return (-1);
1.35 itojun 901: }
1.22 itojun 902: optlen = IP6OPT_JUMBO_LEN;
903:
904: /*
905: * IPv6 packets that have non 0 payload length
1.35 itojun 906: * must not contain a jumbo payload option.
1.22 itojun 907: */
908: ip6 = mtod(m, struct ip6_hdr *);
909: if (ip6->ip6_plen) {
910: ip6stat.ip6s_badoptions++;
911: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 912: ICMP6_PARAMPROB_HEADER,
913: erroff + opt - opthead);
914: return (-1);
1.22 itojun 915: }
1.2 itojun 916:
1.22 itojun 917: /*
918: * We may see jumbolen in unaligned location, so
919: * we'd need to perform bcopy().
920: */
921: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
922: jumboplen = (u_int32_t)htonl(jumboplen);
923:
924: #if 1
925: /*
926: * if there are multiple jumbo payload options,
927: * *plenp will be non-zero and the packet will be
928: * rejected.
929: * the behavior may need some debate in ipngwg -
930: * multiple options does not make sense, however,
931: * there's no explicit mention in specification.
932: */
933: if (*plenp != 0) {
934: ip6stat.ip6s_badoptions++;
935: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 936: ICMP6_PARAMPROB_HEADER,
937: erroff + opt + 2 - opthead);
938: return (-1);
1.22 itojun 939: }
1.8 itojun 940: #endif
1.2 itojun 941:
1.22 itojun 942: /*
943: * jumbo payload length must be larger than 65535.
944: */
945: if (jumboplen <= IPV6_MAXPACKET) {
946: ip6stat.ip6s_badoptions++;
947: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 948: ICMP6_PARAMPROB_HEADER,
949: erroff + opt + 2 - opthead);
950: return (-1);
1.22 itojun 951: }
952: *plenp = jumboplen;
953:
954: break;
1.35 itojun 955: default: /* unknown option */
956: if (hbhlen < IP6OPT_MINLEN) {
957: ip6stat.ip6s_toosmall++;
958: goto bad;
959: }
1.55 itojun 960: optlen = ip6_unknown_opt(opt, m,
961: erroff + opt - opthead);
962: if (optlen == -1)
963: return (-1);
1.35 itojun 964: optlen += 2;
965: break;
1.2 itojun 966: }
967: }
968:
1.55 itojun 969: return (0);
1.2 itojun 970:
971: bad:
972: m_freem(m);
1.55 itojun 973: return (-1);
1.2 itojun 974: }
975:
976: /*
977: * Unknown option processing.
978: * The third argument `off' is the offset from the IPv6 header to the option,
979: * which is necessary if the IPv6 header the and option header and IPv6 header
980: * is not continuous in order to return an ICMPv6 error.
981: */
982: int
983: ip6_unknown_opt(optp, m, off)
984: u_int8_t *optp;
985: struct mbuf *m;
986: int off;
987: {
988: struct ip6_hdr *ip6;
989:
1.35 itojun 990: switch (IP6OPT_TYPE(*optp)) {
991: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 992: return ((int)*(optp + 1));
1.35 itojun 993: case IP6OPT_TYPE_DISCARD: /* silently discard */
994: m_freem(m);
1.58 itojun 995: return (-1);
1.35 itojun 996: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
997: ip6stat.ip6s_badoptions++;
998: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 999: return (-1);
1.35 itojun 1000: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1001: ip6stat.ip6s_badoptions++;
1002: ip6 = mtod(m, struct ip6_hdr *);
1003: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1004: (m->m_flags & (M_BCAST|M_MCAST)))
1005: m_freem(m);
1006: else
1007: icmp6_error(m, ICMP6_PARAM_PROB,
1008: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1009: return (-1);
1.2 itojun 1010: }
1011:
1012: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1013: return (-1);
1.2 itojun 1014: }
1015:
1016: /*
1.9 itojun 1017: * Create the "control" list for this pcb.
1018: *
1019: * The routine will be called from upper layer handlers like tcp6_input().
1020: * Thus the routine assumes that the caller (tcp6_input) have already
1021: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1022: * very first mbuf on the mbuf chain.
1023: * We may want to add some infinite loop prevention or sanity checks for safety.
1024: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1025: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1026: */
1027: void
1028: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 1029: struct in6pcb *in6p;
1030: struct mbuf **mp;
1031: struct ip6_hdr *ip6;
1032: struct mbuf *m;
1.2 itojun 1033: {
1.78.2.1 yamt 1034: #ifdef RFC2292
1035: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1036: #else
1037: #define IS2292(x, y) (y)
1038: #endif
1.9 itojun 1039:
1040: #ifdef SO_TIMESTAMP
1.2 itojun 1041: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1042: struct timeval tv;
1043:
1044: microtime(&tv);
1045: *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
1.63 itojun 1046: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1047: if (*mp)
1048: mp = &(*mp)->m_next;
1049: }
1.9 itojun 1050: #endif
1.2 itojun 1051:
1.78.2.1 yamt 1052: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1053: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1054: return;
1.2 itojun 1055:
1056: /* RFC 2292 sec. 5 */
1.35 itojun 1057: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1058: struct in6_pktinfo pi6;
1.78.2.1 yamt 1059:
1.2 itojun 1060: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.78.2.1 yamt 1061: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1062: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1063: m->m_pkthdr.rcvif->if_index : 0;
1.2 itojun 1064: *mp = sbcreatecontrol((caddr_t) &pi6,
1.78.2.1 yamt 1065: sizeof(struct in6_pktinfo),
1066: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1067: if (*mp)
1068: mp = &(*mp)->m_next;
1069: }
1.78.2.1 yamt 1070:
1.2 itojun 1071: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1072: int hlim = ip6->ip6_hlim & 0xff;
1.78.2.1 yamt 1073:
1.63 itojun 1074: *mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),
1.78.2.1 yamt 1075: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1076: if (*mp)
1077: mp = &(*mp)->m_next;
1078: }
1079:
1080: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1081: u_int32_t flowinfo;
1082: int tclass;
1083:
1084: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1085: flowinfo >>= 20;
1086:
1087: tclass = flowinfo & 0xff;
1088: *mp = sbcreatecontrol((caddr_t)&tclass, sizeof(tclass),
1089: IPV6_TCLASS, IPPROTO_IPV6);
1090:
1.2 itojun 1091: if (*mp)
1092: mp = &(*mp)->m_next;
1093: }
1094:
1095: /*
1.75 itojun 1096: * IPV6_HOPOPTS socket option. Recall that we required super-user
1097: * privilege for the option (see ip6_ctloutput), but it might be too
1098: * strict, since there might be some hop-by-hop options which can be
1099: * returned to normal user.
1.78.2.1 yamt 1100: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1101: */
1.75 itojun 1102: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1103: /*
1104: * Check if a hop-by-hop options header is contatined in the
1105: * received packet, and if so, store the options as ancillary
1106: * data. Note that a hop-by-hop options header must be
1107: * just after the IPv6 header, which fact is assured through
1108: * the IPv6 input processing.
1109: */
1.78 christos 1110: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1111: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1112: struct ip6_hbh *hbh;
1113: int hbhlen;
1.62 itojun 1114: struct mbuf *ext;
1.9 itojun 1115:
1.62 itojun 1116: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1117: xip6->ip6_nxt);
1.62 itojun 1118: if (ext == NULL) {
1.9 itojun 1119: ip6stat.ip6s_tooshort++;
1120: return;
1121: }
1.62 itojun 1122: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1123: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1124: if (hbhlen != ext->m_len) {
1125: m_freem(ext);
1.9 itojun 1126: ip6stat.ip6s_tooshort++;
1127: return;
1128: }
1.2 itojun 1129:
1130: /*
1131: * XXX: We copy whole the header even if a jumbo
1132: * payload option is included, which option is to
1133: * be removed before returning in the RFC 2292.
1.78.2.1 yamt 1134: * Note: this constraint is removed in RFC3542.
1.2 itojun 1135: */
1.9 itojun 1136: *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
1.78.2.1 yamt 1137: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1138: IPPROTO_IPV6);
1.2 itojun 1139: if (*mp)
1140: mp = &(*mp)->m_next;
1.62 itojun 1141: m_freem(ext);
1.2 itojun 1142: }
1143: }
1144:
1145: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1146: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1147: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1148: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1149:
1150: /*
1151: * Search for destination options headers or routing
1152: * header(s) through the header chain, and stores each
1153: * header as ancillary data.
1154: * Note that the order of the headers remains in
1155: * the chain of ancillary data.
1156: */
1.78.2.1 yamt 1157: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1158: struct ip6_ext *ip6e = NULL;
1.9 itojun 1159: int elen;
1.62 itojun 1160: struct mbuf *ext = NULL;
1.9 itojun 1161:
1.62 itojun 1162: /*
1163: * if it is not an extension header, don't try to
1164: * pull it from the chain.
1165: */
1166: switch (nxt) {
1167: case IPPROTO_DSTOPTS:
1168: case IPPROTO_ROUTING:
1169: case IPPROTO_HOPOPTS:
1170: case IPPROTO_AH: /* is it possible? */
1171: break;
1172: default:
1173: goto loopend;
1174: }
1175:
1176: ext = ip6_pullexthdr(m, off, nxt);
1177: if (ext == NULL) {
1.9 itojun 1178: ip6stat.ip6s_tooshort++;
1179: return;
1180: }
1.62 itojun 1181: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1182: if (nxt == IPPROTO_AH)
1183: elen = (ip6e->ip6e_len + 2) << 2;
1184: else
1185: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1186: if (elen != ext->m_len) {
1187: m_freem(ext);
1.9 itojun 1188: ip6stat.ip6s_tooshort++;
1189: return;
1190: }
1.57 thorpej 1191: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1192:
1.35 itojun 1193: switch (nxt) {
1.62 itojun 1194: case IPPROTO_DSTOPTS:
1.35 itojun 1195: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1196: break;
1197:
1198: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.78.2.1 yamt 1199: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1200: IPPROTO_IPV6);
1.35 itojun 1201: if (*mp)
1202: mp = &(*mp)->m_next;
1203: break;
1204:
1205: case IPPROTO_ROUTING:
1206: if (!in6p->in6p_flags & IN6P_RTHDR)
1207: break;
1208:
1209: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.78.2.1 yamt 1210: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1211: IPPROTO_IPV6);
1.35 itojun 1212: if (*mp)
1213: mp = &(*mp)->m_next;
1214: break;
1215:
1.62 itojun 1216: case IPPROTO_HOPOPTS:
1217: case IPPROTO_AH: /* is it possible? */
1218: break;
1219:
1.35 itojun 1220: default:
1221: /*
1.62 itojun 1222: * other cases have been filtered in the above.
1223: * none will visit this case. here we supply
1224: * the code just in case (nxt overwritten or
1225: * other cases).
1.35 itojun 1226: */
1.62 itojun 1227: m_freem(ext);
1.35 itojun 1228: goto loopend;
1229:
1.2 itojun 1230: }
1231:
1232: /* proceed with the next header. */
1.9 itojun 1233: off += elen;
1.2 itojun 1234: nxt = ip6e->ip6e_nxt;
1.62 itojun 1235: ip6e = NULL;
1236: m_freem(ext);
1237: ext = NULL;
1.2 itojun 1238: }
1239: loopend:
1.62 itojun 1240: ;
1.2 itojun 1241: }
1.62 itojun 1242: }
1.78.2.1 yamt 1243: #undef IS2292
1244:
1245:
1246: void
1247: ip6_notify_pmtu(struct in6pcb *in6p, struct sockaddr_in6 *dst, uint32_t *mtu)
1248: {
1249: struct socket *so;
1250: struct mbuf *m_mtu;
1251: struct ip6_mtuinfo mtuctl;
1252:
1253: so = in6p->in6p_socket;
1254:
1255: if (mtu == NULL)
1256: return;
1257:
1258: #ifdef DIAGNOSTIC
1259: if (so == NULL) /* I believe this is impossible */
1260: panic("ip6_notify_pmtu: socket is NULL");
1261: #endif
1262:
1263: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1264: mtuctl.ip6m_mtu = *mtu;
1265: mtuctl.ip6m_addr = *dst;
1266: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1267: return;
1268:
1269: if ((m_mtu = sbcreatecontrol((caddr_t)&mtuctl, sizeof(mtuctl),
1270: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1271: return;
1272:
1273: if (sbappendaddr(&so->so_rcv, (struct sockaddr *)dst, NULL, m_mtu)
1274: == 0) {
1275: m_freem(m_mtu);
1276: /* XXX: should count statistics */
1277: } else
1278: sorwakeup(so);
1279:
1280: return;
1281: }
1.62 itojun 1282:
1283: /*
1284: * pull single extension header from mbuf chain. returns single mbuf that
1285: * contains the result, or NULL on error.
1286: */
1287: static struct mbuf *
1288: ip6_pullexthdr(m, off, nxt)
1289: struct mbuf *m;
1290: size_t off;
1291: int nxt;
1292: {
1293: struct ip6_ext ip6e;
1294: size_t elen;
1295: struct mbuf *n;
1296:
1297: #ifdef DIAGNOSTIC
1298: switch (nxt) {
1299: case IPPROTO_DSTOPTS:
1300: case IPPROTO_ROUTING:
1301: case IPPROTO_HOPOPTS:
1302: case IPPROTO_AH: /* is it possible? */
1303: break;
1304: default:
1305: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1306: }
1.62 itojun 1307: #endif
1.2 itojun 1308:
1.62 itojun 1309: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1310: if (nxt == IPPROTO_AH)
1311: elen = (ip6e.ip6e_len + 2) << 2;
1312: else
1313: elen = (ip6e.ip6e_len + 1) << 3;
1314:
1315: MGET(n, M_DONTWAIT, MT_DATA);
1316: if (n && elen >= MLEN) {
1317: MCLGET(n, M_DONTWAIT);
1318: if ((n->m_flags & M_EXT) == 0) {
1319: m_free(n);
1320: n = NULL;
1321: }
1322: }
1323: if (!n)
1324: return NULL;
1325:
1326: n->m_len = 0;
1327: if (elen >= M_TRAILINGSPACE(n)) {
1328: m_free(n);
1329: return NULL;
1330: }
1331:
1332: m_copydata(m, off, elen, mtod(n, caddr_t));
1333: n->m_len = elen;
1334: return n;
1.2 itojun 1335: }
1336:
1337: /*
1338: * Get pointer to the previous header followed by the header
1339: * currently processed.
1340: * XXX: This function supposes that
1341: * M includes all headers,
1342: * the next header field and the header length field of each header
1343: * are valid, and
1344: * the sum of each header length equals to OFF.
1345: * Because of these assumptions, this function must be called very
1346: * carefully. Moreover, it will not be used in the near future when
1347: * we develop `neater' mechanism to process extension headers.
1348: */
1.58 itojun 1349: u_int8_t *
1.2 itojun 1350: ip6_get_prevhdr(m, off)
1351: struct mbuf *m;
1352: int off;
1353: {
1354: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1355:
1356: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1357: return (&ip6->ip6_nxt);
1.2 itojun 1358: else {
1359: int len, nxt;
1360: struct ip6_ext *ip6e = NULL;
1361:
1362: nxt = ip6->ip6_nxt;
1363: len = sizeof(struct ip6_hdr);
1364: while (len < off) {
1365: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
1366:
1.35 itojun 1367: switch (nxt) {
1.2 itojun 1368: case IPPROTO_FRAGMENT:
1369: len += sizeof(struct ip6_frag);
1370: break;
1371: case IPPROTO_AH:
1372: len += (ip6e->ip6e_len + 2) << 2;
1373: break;
1374: default:
1375: len += (ip6e->ip6e_len + 1) << 3;
1376: break;
1377: }
1378: nxt = ip6e->ip6e_nxt;
1379: }
1380: if (ip6e)
1.58 itojun 1381: return (&ip6e->ip6e_nxt);
1.2 itojun 1382: else
1383: return NULL;
1.18 itojun 1384: }
1385: }
1386:
1387: /*
1388: * get next header offset. m will be retained.
1389: */
1390: int
1391: ip6_nexthdr(m, off, proto, nxtp)
1392: struct mbuf *m;
1393: int off;
1394: int proto;
1395: int *nxtp;
1396: {
1397: struct ip6_hdr ip6;
1398: struct ip6_ext ip6e;
1399: struct ip6_frag fh;
1400:
1401: /* just in case */
1402: if (m == NULL)
1403: panic("ip6_nexthdr: m == NULL");
1404: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1405: return -1;
1406:
1407: switch (proto) {
1408: case IPPROTO_IPV6:
1.78.2.1 yamt 1409: /* do not chase beyond intermediate IPv6 headers */
1410: if (off != 0)
1411: return -1;
1.18 itojun 1412: if (m->m_pkthdr.len < off + sizeof(ip6))
1413: return -1;
1414: m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
1415: if (nxtp)
1416: *nxtp = ip6.ip6_nxt;
1417: off += sizeof(ip6);
1418: return off;
1419:
1420: case IPPROTO_FRAGMENT:
1421: /*
1422: * terminate parsing if it is not the first fragment,
1423: * it does not make sense to parse through it.
1424: */
1425: if (m->m_pkthdr.len < off + sizeof(fh))
1426: return -1;
1427: m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
1.67 itojun 1428: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1429: return -1;
1430: if (nxtp)
1431: *nxtp = fh.ip6f_nxt;
1432: off += sizeof(struct ip6_frag);
1433: return off;
1434:
1435: case IPPROTO_AH:
1436: if (m->m_pkthdr.len < off + sizeof(ip6e))
1437: return -1;
1438: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1439: if (nxtp)
1440: *nxtp = ip6e.ip6e_nxt;
1441: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1442: if (m->m_pkthdr.len < off)
1443: return -1;
1.18 itojun 1444: return off;
1445:
1446: case IPPROTO_HOPOPTS:
1447: case IPPROTO_ROUTING:
1448: case IPPROTO_DSTOPTS:
1449: if (m->m_pkthdr.len < off + sizeof(ip6e))
1450: return -1;
1451: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1452: if (nxtp)
1453: *nxtp = ip6e.ip6e_nxt;
1454: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1455: if (m->m_pkthdr.len < off)
1456: return -1;
1.18 itojun 1457: return off;
1458:
1459: case IPPROTO_NONE:
1460: case IPPROTO_ESP:
1461: case IPPROTO_IPCOMP:
1462: /* give up */
1463: return -1;
1464:
1465: default:
1466: return -1;
1467: }
1468: }
1469:
1470: /*
1471: * get offset for the last header in the chain. m will be kept untainted.
1472: */
1473: int
1474: ip6_lasthdr(m, off, proto, nxtp)
1475: struct mbuf *m;
1476: int off;
1477: int proto;
1478: int *nxtp;
1479: {
1480: int newoff;
1481: int nxt;
1482:
1483: if (!nxtp) {
1484: nxt = -1;
1485: nxtp = &nxt;
1486: }
1.78.2.1 yamt 1487: for (;;) {
1.18 itojun 1488: newoff = ip6_nexthdr(m, off, proto, nxtp);
1489: if (newoff < 0)
1490: return off;
1491: else if (newoff < off)
1492: return -1; /* invalid */
1493: else if (newoff == off)
1494: return newoff;
1495:
1496: off = newoff;
1497: proto = *nxtp;
1.2 itojun 1498: }
1499: }
1500:
1.78.2.1 yamt 1501: struct m_tag *
1502: ip6_addaux(m)
1503: struct mbuf *m;
1504: {
1505: struct m_tag *mtag;
1506:
1507: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1508: if (!mtag) {
1509: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1510: M_NOWAIT);
1511: if (mtag) {
1512: m_tag_prepend(m, mtag);
1513: bzero(mtag + 1, sizeof(struct ip6aux));
1514: }
1515: }
1516: return mtag;
1517: }
1518:
1519: struct m_tag *
1520: ip6_findaux(m)
1521: struct mbuf *m;
1522: {
1523: struct m_tag *mtag;
1524:
1525: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1526: return mtag;
1527: }
1528:
1529: void
1530: ip6_delaux(m)
1531: struct mbuf *m;
1532: {
1533: struct m_tag *mtag;
1534:
1535: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1536: if (mtag)
1537: m_tag_delete(m, mtag);
1538: }
1539:
1.2 itojun 1540: /*
1541: * System control for IP6
1542: */
1543:
1544: u_char inet6ctlerrmap[PRC_NCMDS] = {
1545: 0, 0, 0, 0,
1546: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1547: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1548: EMSGSIZE, EHOSTUNREACH, 0, 0,
1549: 0, 0, 0, 0,
1550: ENOPROTOOPT
1551: };
1552:
1.70 atatat 1553: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1554: {
1.78.2.1 yamt 1555: #ifdef RFC2292
1556: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1557: #else
1558: #define IS2292(x, y) (y)
1559: #endif
1.26 itojun 1560:
1.73 atatat 1561: sysctl_createv(clog, 0, NULL, NULL,
1562: CTLFLAG_PERMANENT,
1.70 atatat 1563: CTLTYPE_NODE, "net", NULL,
1564: NULL, 0, NULL, 0,
1565: CTL_NET, CTL_EOL);
1.73 atatat 1566: sysctl_createv(clog, 0, NULL, NULL,
1567: CTLFLAG_PERMANENT,
1.74 atatat 1568: CTLTYPE_NODE, "inet6",
1569: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1570: NULL, 0, NULL, 0,
1571: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1572: sysctl_createv(clog, 0, NULL, NULL,
1573: CTLFLAG_PERMANENT,
1.74 atatat 1574: CTLTYPE_NODE, "ip6",
1575: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1576: NULL, 0, NULL, 0,
1577: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1578:
1.73 atatat 1579: sysctl_createv(clog, 0, NULL, NULL,
1580: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1581: CTLTYPE_INT, "forwarding",
1582: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1583: NULL, 0, &ip6_forwarding, 0,
1584: CTL_NET, PF_INET6, IPPROTO_IPV6,
1585: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1586: sysctl_createv(clog, 0, NULL, NULL,
1587: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1588: CTLTYPE_INT, "redirect",
1589: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1590: NULL, 0, &ip6_sendredirects, 0,
1591: CTL_NET, PF_INET6, IPPROTO_IPV6,
1592: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1593: sysctl_createv(clog, 0, NULL, NULL,
1594: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1595: CTLTYPE_INT, "hlim",
1596: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1597: NULL, 0, &ip6_defhlim, 0,
1598: CTL_NET, PF_INET6, IPPROTO_IPV6,
1599: IPV6CTL_DEFHLIM, CTL_EOL);
1600: #ifdef notyet
1.73 atatat 1601: sysctl_createv(clog, 0, NULL, NULL,
1602: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1603: CTLTYPE_INT, "mtu", NULL,
1604: NULL, 0, &, 0,
1605: CTL_NET, PF_INET6, IPPROTO_IPV6,
1606: IPV6CTL_DEFMTU, CTL_EOL);
1607: #endif
1608: #ifdef __no_idea__
1.73 atatat 1609: sysctl_createv(clog, 0, NULL, NULL,
1610: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1611: CTLTYPE_INT, "forwsrcrt", NULL,
1612: NULL, 0, &?, 0,
1613: CTL_NET, PF_INET6, IPPROTO_IPV6,
1614: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1615: sysctl_createv(clog, 0, NULL, NULL,
1616: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1617: CTLTYPE_STRUCT, "mrtstats", NULL,
1618: NULL, 0, &?, sizeof(?),
1619: CTL_NET, PF_INET6, IPPROTO_IPV6,
1620: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1621: sysctl_createv(clog, 0, NULL, NULL,
1622: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1623: CTLTYPE_?, "mrtproto", NULL,
1624: NULL, 0, &?, sizeof(?),
1625: CTL_NET, PF_INET6, IPPROTO_IPV6,
1626: IPV6CTL_MRTPROTO, CTL_EOL);
1627: #endif
1.73 atatat 1628: sysctl_createv(clog, 0, NULL, NULL,
1629: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1630: CTLTYPE_INT, "maxfragpackets",
1631: SYSCTL_DESCR("Maximum number of fragments to buffer "
1632: "for reassembly"),
1.70 atatat 1633: NULL, 0, &ip6_maxfragpackets, 0,
1634: CTL_NET, PF_INET6, IPPROTO_IPV6,
1635: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1636: #ifdef __no_idea__
1.73 atatat 1637: sysctl_createv(clog, 0, NULL, NULL,
1638: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1639: CTLTYPE_INT, "sourcecheck", NULL,
1640: NULL, 0, &?, 0,
1641: CTL_NET, PF_INET6, IPPROTO_IPV6,
1642: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1643: sysctl_createv(clog, 0, NULL, NULL,
1644: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1645: CTLTYPE_INT, "sourcecheck_logint", NULL,
1646: NULL, 0, &?, 0,
1647: CTL_NET, PF_INET6, IPPROTO_IPV6,
1648: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1649: #endif
1.73 atatat 1650: sysctl_createv(clog, 0, NULL, NULL,
1651: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1652: CTLTYPE_INT, "accept_rtadv",
1653: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1654: NULL, 0, &ip6_accept_rtadv, 0,
1655: CTL_NET, PF_INET6, IPPROTO_IPV6,
1656: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1657: sysctl_createv(clog, 0, NULL, NULL,
1658: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1659: CTLTYPE_INT, "keepfaith",
1660: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1661: NULL, 0, &ip6_keepfaith, 0,
1662: CTL_NET, PF_INET6, IPPROTO_IPV6,
1663: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1664: sysctl_createv(clog, 0, NULL, NULL,
1665: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1666: CTLTYPE_INT, "log_interval",
1667: SYSCTL_DESCR("Minumum interval between logging "
1668: "unroutable packets"),
1.70 atatat 1669: NULL, 0, &ip6_log_interval, 0,
1670: CTL_NET, PF_INET6, IPPROTO_IPV6,
1671: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1672: sysctl_createv(clog, 0, NULL, NULL,
1673: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1674: CTLTYPE_INT, "hdrnestlimit",
1675: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1676: NULL, 0, &ip6_hdrnestlimit, 0,
1677: CTL_NET, PF_INET6, IPPROTO_IPV6,
1678: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1679: sysctl_createv(clog, 0, NULL, NULL,
1680: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1681: CTLTYPE_INT, "dad_count",
1682: SYSCTL_DESCR("Number of Duplicate Address Detection "
1683: "probes to send"),
1.70 atatat 1684: NULL, 0, &ip6_dad_count, 0,
1685: CTL_NET, PF_INET6, IPPROTO_IPV6,
1686: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1687: sysctl_createv(clog, 0, NULL, NULL,
1688: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1689: CTLTYPE_INT, "auto_flowlabel",
1690: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1691: NULL, 0, &ip6_auto_flowlabel, 0,
1692: CTL_NET, PF_INET6, IPPROTO_IPV6,
1693: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1694: sysctl_createv(clog, 0, NULL, NULL,
1695: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1696: CTLTYPE_INT, "defmcasthlim",
1697: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1698: NULL, 0, &ip6_defmcasthlim, 0,
1699: CTL_NET, PF_INET6, IPPROTO_IPV6,
1700: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1701: #if NGIF > 0
1.73 atatat 1702: sysctl_createv(clog, 0, NULL, NULL,
1703: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1704: CTLTYPE_INT, "gifhlim",
1705: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1706: NULL, 0, &ip6_gif_hlim, 0,
1707: CTL_NET, PF_INET6, IPPROTO_IPV6,
1708: IPV6CTL_GIF_HLIM, CTL_EOL);
1709: #endif /* NGIF */
1.73 atatat 1710: sysctl_createv(clog, 0, NULL, NULL,
1711: CTLFLAG_PERMANENT,
1.74 atatat 1712: CTLTYPE_STRING, "kame_version",
1713: SYSCTL_DESCR("KAME Version"),
1.78 christos 1714: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1715: CTL_NET, PF_INET6, IPPROTO_IPV6,
1716: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1717: sysctl_createv(clog, 0, NULL, NULL,
1718: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1719: CTLTYPE_INT, "use_deprecated",
1720: SYSCTL_DESCR("Allow use of deprecated addresses as "
1721: "source addresses"),
1.70 atatat 1722: NULL, 0, &ip6_use_deprecated, 0,
1723: CTL_NET, PF_INET6, IPPROTO_IPV6,
1724: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1725: sysctl_createv(clog, 0, NULL, NULL,
1726: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1727: CTLTYPE_INT, "rr_prune", NULL,
1728: NULL, 0, &ip6_rr_prune, 0,
1729: CTL_NET, PF_INET6, IPPROTO_IPV6,
1730: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1731: sysctl_createv(clog, 0, NULL, NULL,
1732: CTLFLAG_PERMANENT
1.70 atatat 1733: #ifndef INET6_BINDV6ONLY
1.73 atatat 1734: |CTLFLAG_READWRITE,
1.70 atatat 1735: #endif
1.74 atatat 1736: CTLTYPE_INT, "v6only",
1737: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1738: "to PF_INET sockets"),
1.70 atatat 1739: NULL, 0, &ip6_v6only, 0,
1740: CTL_NET, PF_INET6, IPPROTO_IPV6,
1741: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1742: sysctl_createv(clog, 0, NULL, NULL,
1743: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1744: CTLTYPE_INT, "anonportmin",
1745: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1746: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1747: CTL_NET, PF_INET6, IPPROTO_IPV6,
1748: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1749: sysctl_createv(clog, 0, NULL, NULL,
1750: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1751: CTLTYPE_INT, "anonportmax",
1752: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1753: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1754: CTL_NET, PF_INET6, IPPROTO_IPV6,
1755: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1756: #ifndef IPNOPRIVPORTS
1.73 atatat 1757: sysctl_createv(clog, 0, NULL, NULL,
1758: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1759: CTLTYPE_INT, "lowportmin",
1760: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1761: "to assign"),
1.70 atatat 1762: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1763: CTL_NET, PF_INET6, IPPROTO_IPV6,
1764: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1765: sysctl_createv(clog, 0, NULL, NULL,
1766: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1767: CTLTYPE_INT, "lowportmax",
1768: SYSCTL_DESCR("Highest privileged ephemeral port number "
1769: "to assign"),
1.70 atatat 1770: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1771: CTL_NET, PF_INET6, IPPROTO_IPV6,
1772: IPV6CTL_LOWPORTMAX, CTL_EOL);
1773: #endif /* IPNOPRIVPORTS */
1.73 atatat 1774: sysctl_createv(clog, 0, NULL, NULL,
1775: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.78.2.1 yamt 1776: CTLTYPE_INT, "use_tempaddr",
1777: SYSCTL_DESCR("Use temporary address"),
1778: NULL, 0, &ip6_use_tempaddr, 0,
1779: CTL_NET, PF_INET6, IPPROTO_IPV6,
1780: CTL_CREATE, CTL_EOL);
1781: sysctl_createv(clog, 0, NULL, NULL,
1782: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1783: CTLTYPE_INT, "temppltime",
1784: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1785: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1786: CTL_NET, PF_INET6, IPPROTO_IPV6,
1787: CTL_CREATE, CTL_EOL);
1788: sysctl_createv(clog, 0, NULL, NULL,
1789: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1790: CTLTYPE_INT, "tempvltime",
1791: SYSCTL_DESCR("valid lifetime of a temporary address"),
1792: NULL, 0, &ip6_temp_valid_lifetime, 0,
1793: CTL_NET, PF_INET6, IPPROTO_IPV6,
1794: CTL_CREATE, CTL_EOL);
1795: sysctl_createv(clog, 0, NULL, NULL,
1796: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1797: CTLTYPE_INT, "maxfrags",
1798: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1799: NULL, 0, &ip6_maxfrags, 0,
1800: CTL_NET, PF_INET6, IPPROTO_IPV6,
1801: IPV6CTL_MAXFRAGS, CTL_EOL);
1.78.2.1 yamt 1802: sysctl_createv(clog, 0, NULL, NULL,
1803: CTLFLAG_PERMANENT,
1804: CTLTYPE_STRUCT, "stats",
1805: SYSCTL_DESCR("IPv6 statistics"),
1806: NULL, 0, &ip6stat, sizeof(ip6stat),
1807: CTL_NET, PF_INET6, IPPROTO_IPV6,
1808: IPV6CTL_STATS, CTL_EOL);
1809: sysctl_createv(clog, 0, NULL, NULL,
1810: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1811: CTLTYPE_INT, "use_defaultzone",
1812: SYSCTL_DESCR("Whether to use the default scope zones"),
1813: NULL, 0, &ip6_use_defzone, 0,
1814: CTL_NET, PF_INET6, IPPROTO_IPV6,
1815: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1816: sysctl_createv(clog, 0, NULL, NULL,
1817: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1818: CTLTYPE_INT, "mcast_pmtu",
1819: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1820: NULL, 0, &ip6_mcast_pmtu, 0,
1821: CTL_NET, PF_INET6, IPPROTO_IPV6,
1822: CTL_CREATE, CTL_EOL);
1.2 itojun 1823: }
CVSweb <webmaster@jp.NetBSD.org>