Annotation of src/sys/netinet6/ip6_input.c, Revision 1.90
1.90 ! christos 1: /* $NetBSD: ip6_input.c,v 1.89 2006/10/12 01:32:39 christos Exp $ */
1.40 itojun 2: /* $KAME: ip6_input.c,v 1.188 2001/03/29 05:34:31 itojun Exp $ */
1.3 thorpej 3:
1.2 itojun 4: /*
5: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6: * All rights reserved.
1.21 itojun 7: *
1.2 itojun 8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the project nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
1.21 itojun 19: *
1.2 itojun 20: * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: /*
34: * Copyright (c) 1982, 1986, 1988, 1993
35: * The Regents of the University of California. All rights reserved.
36: *
37: * Redistribution and use in source and binary forms, with or without
38: * modification, are permitted provided that the following conditions
39: * are met:
40: * 1. Redistributions of source code must retain the above copyright
41: * notice, this list of conditions and the following disclaimer.
42: * 2. Redistributions in binary form must reproduce the above copyright
43: * notice, this list of conditions and the following disclaimer in the
44: * documentation and/or other materials provided with the distribution.
1.65 agc 45: * 3. Neither the name of the University nor the names of its contributors
1.2 itojun 46: * may be used to endorse or promote products derived from this software
47: * without specific prior written permission.
48: *
49: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59: * SUCH DAMAGE.
60: *
61: * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
62: */
1.48 lukem 63:
64: #include <sys/cdefs.h>
1.90 ! christos 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.89 2006/10/12 01:32:39 christos Exp $");
1.2 itojun 66:
67: #include "opt_inet.h"
1.85 rpaulo 68: #include "opt_inet6.h"
1.4 thorpej 69: #include "opt_ipsec.h"
1.15 darrenr 70: #include "opt_pfil_hooks.h"
1.2 itojun 71:
72: #include <sys/param.h>
73: #include <sys/systm.h>
74: #include <sys/malloc.h>
75: #include <sys/mbuf.h>
76: #include <sys/domain.h>
77: #include <sys/protosw.h>
78: #include <sys/socket.h>
79: #include <sys/socketvar.h>
80: #include <sys/errno.h>
81: #include <sys/time.h>
82: #include <sys/kernel.h>
83: #include <sys/syslog.h>
84: #include <sys/proc.h>
1.46 simonb 85: #include <sys/sysctl.h>
1.2 itojun 86:
87: #include <net/if.h>
88: #include <net/if_types.h>
89: #include <net/if_dl.h>
90: #include <net/route.h>
91: #include <net/netisr.h>
1.15 darrenr 92: #ifdef PFIL_HOOKS
93: #include <net/pfil.h>
94: #endif
1.2 itojun 95:
96: #include <netinet/in.h>
1.9 itojun 97: #include <netinet/in_systm.h>
98: #ifdef INET
99: #include <netinet/ip.h>
100: #include <netinet/ip_icmp.h>
1.45 itojun 101: #endif /* INET */
1.14 itojun 102: #include <netinet/ip6.h>
1.2 itojun 103: #include <netinet6/in6_var.h>
1.11 itojun 104: #include <netinet6/ip6_var.h>
1.2 itojun 105: #include <netinet6/in6_pcb.h>
1.14 itojun 106: #include <netinet/icmp6.h>
1.81 rpaulo 107: #include <netinet6/scope6_var.h>
1.2 itojun 108: #include <netinet6/in6_ifattach.h>
109: #include <netinet6/nd6.h>
110:
1.37 itojun 111: #ifdef IPSEC
112: #include <netinet6/ipsec.h>
113: #endif
114:
1.2 itojun 115: #include <netinet6/ip6protosw.h>
116:
117: #include "faith.h"
118: #include "gif.h"
1.50 itojun 119:
120: #if NGIF > 0
121: #include <netinet6/in6_gif.h>
122: #endif
1.2 itojun 123:
1.9 itojun 124: #include <net/net_osdep.h>
125:
1.2 itojun 126: extern struct domain inet6domain;
127:
128: u_char ip6_protox[IPPROTO_MAX];
129: static int ip6qmaxlen = IFQ_MAXLEN;
130: struct in6_ifaddr *in6_ifaddr;
131: struct ifqueue ip6intrq;
132:
1.83 rpaulo 133: extern struct callout in6_tmpaddrtimer_ch;
134:
1.2 itojun 135: int ip6_forward_srcrt; /* XXX */
136: int ip6_sourcecheck; /* XXX */
137: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 138:
1.29 thorpej 139: #ifdef PFIL_HOOKS
140: struct pfil_head inet6_pfil_hook;
141: #endif
142:
1.2 itojun 143: struct ip6stat ip6stat;
144:
145: static void ip6_init2 __P((void *));
1.81 rpaulo 146: static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *));
1.2 itojun 147:
1.5 itojun 148: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
1.62 itojun 149: static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));
1.2 itojun 150:
151: /*
152: * IP6 initialization: fill in IP6 protocol switch table.
153: * All protocols not implemented in kernel go to raw IP6 protocol handler.
154: */
155: void
156: ip6_init()
157: {
1.78 christos 158: const struct ip6protosw *pr;
1.35 itojun 159: int i;
1.2 itojun 160:
1.78 christos 161: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 162: if (pr == 0)
163: panic("ip6_init");
164: for (i = 0; i < IPPROTO_MAX; i++)
165: ip6_protox[i] = pr - inet6sw;
1.78 christos 166: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
167: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 168: if (pr->pr_domain->dom_family == PF_INET6 &&
169: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
170: ip6_protox[pr->pr_protocol] = pr - inet6sw;
171: ip6intrq.ifq_maxlen = ip6qmaxlen;
1.81 rpaulo 172: scope6_init();
173: addrsel_policy_init();
1.2 itojun 174: nd6_init();
175: frag6_init();
1.83 rpaulo 176: ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 177:
178: ip6_init2((void *)0);
1.29 thorpej 179:
180: #ifdef PFIL_HOOKS
181: /* Register our Packet Filter hook. */
1.33 thorpej 182: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
183: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 184: i = pfil_head_register(&inet6_pfil_hook);
185: if (i != 0)
186: printf("ip6_init: WARNING: unable to register pfil hook, "
187: "error %d\n", i);
188: #endif /* PFIL_HOOKS */
1.2 itojun 189: }
190:
191: static void
1.90 ! christos 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);
1.83 rpaulo 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;
1.83 rpaulo 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: /*
1.81 rpaulo 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
1.81 rpaulo 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:
1.2 itojun 402: /*
1.82 yamt 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: */
1.88 bouyer 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 *);
1.82 yamt 416: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
417: ip6stat.ip6s_badscope++; /* XXX */
418: goto bad;
419: }
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;
424: }
425:
426: /*
1.2 itojun 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: */
1.22 itojun 453: if (ip6_forward_rt.ro_rt != NULL &&
1.55 itojun 454: (ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 &&
1.22 itojun 455: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.72 itojun 456: &((struct sockaddr_in6 *)(&ip6_forward_rt.ro_dst))->sin6_addr))
1.25 itojun 457: ip6stat.ip6s_forward_cachehit++;
1.22 itojun 458: else {
1.35 itojun 459: struct sockaddr_in6 *dst6;
460:
1.2 itojun 461: if (ip6_forward_rt.ro_rt) {
1.22 itojun 462: /* route is down or destination is different */
1.25 itojun 463: ip6stat.ip6s_forward_cachemiss++;
1.2 itojun 464: RTFREE(ip6_forward_rt.ro_rt);
465: ip6_forward_rt.ro_rt = 0;
466: }
1.22 itojun 467:
1.2 itojun 468: bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6));
1.35 itojun 469: dst6 = (struct sockaddr_in6 *)&ip6_forward_rt.ro_dst;
470: dst6->sin6_len = sizeof(struct sockaddr_in6);
471: dst6->sin6_family = AF_INET6;
472: dst6->sin6_addr = ip6->ip6_dst;
1.2 itojun 473:
1.9 itojun 474: rtalloc((struct route *)&ip6_forward_rt);
1.2 itojun 475: }
476:
477: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
478:
479: /*
480: * Accept the packet if the forwarding interface to the destination
481: * according to the routing table is the loopback interface,
482: * unless the associated route has a gateway.
483: * Note that this approach causes to accept a packet if there is a
484: * route to the loopback interface for the destination of the packet.
485: * But we think it's even useful in some situations, e.g. when using
486: * a special daemon which wants to intercept the packet.
487: */
488: if (ip6_forward_rt.ro_rt &&
489: (ip6_forward_rt.ro_rt->rt_flags &
490: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55 itojun 491: !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2 itojun 492: #if 0
493: /*
494: * The check below is redundant since the comparison of
495: * the destination and the key of the rtentry has
496: * already done through looking up the routing table.
497: */
498: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55 itojun 499: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2 itojun 500: #endif
1.9 itojun 501: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 502: struct in6_ifaddr *ia6 =
503: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
504: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
505: m->m_flags |= M_ANYCAST6;
1.24 itojun 506: /*
507: * packets to a tentative, duplicated, or somehow invalid
508: * address must not be accepted.
509: */
1.2 itojun 510: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 511: /* this address is ready */
1.2 itojun 512: ours = 1;
1.9 itojun 513: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 514: goto hbhcheck;
515: } else {
1.24 itojun 516: /* address is not ready, so discard the packet. */
1.34 itojun 517: nd6log((LOG_INFO,
1.27 itojun 518: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 519: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 520: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 521:
522: goto bad;
1.2 itojun 523: }
524: }
525:
526: /*
1.55 itojun 527: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 528: */
529: #if defined(NFAITH) && 0 < NFAITH
530: if (ip6_keepfaith) {
1.71 itojun 531: if (ip6_forward_rt.ro_rt && ip6_forward_rt.ro_rt->rt_ifp &&
532: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 533: /* XXX do we need more sanity checks? */
534: ours = 1;
1.45 itojun 535: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 536: goto hbhcheck;
537: }
538: }
539: #endif
540:
541: #if 0
542: {
543: /*
544: * Last resort: check in6_ifaddr for incoming interface.
545: * The code is here until I update the "goto ours hack" code above
546: * working right.
547: */
548: struct ifaddr *ifa;
549: for (ifa = m->m_pkthdr.rcvif->if_addrlist.tqh_first;
550: ifa;
551: ifa = ifa->ifa_list.tqe_next) {
552: if (ifa->ifa_addr == NULL)
553: continue; /* just for safety */
554: if (ifa->ifa_addr->sa_family != AF_INET6)
555: continue;
556: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
557: ours = 1;
558: deliverifp = ifa->ifa_ifp;
1.2 itojun 559: goto hbhcheck;
560: }
561: }
1.9 itojun 562: }
1.2 itojun 563: #endif
564:
565: /*
566: * Now there is no reason to process the packet if it's not our own
567: * and we're not a router.
568: */
569: if (!ip6_forwarding) {
570: ip6stat.ip6s_cantforward++;
1.9 itojun 571: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 572: goto bad;
573: }
574:
575: hbhcheck:
576: /*
1.81 rpaulo 577: * record address information into m_tag, if we don't have one yet.
578: * note that we are unable to record it, if the address is not listed
579: * as our interface address (e.g. multicast addresses, addresses
580: * within FAITH prefixes and such).
581: */
582: if (deliverifp && !ip6_getdstifaddr(m)) {
583: struct in6_ifaddr *ia6;
584:
585: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
586: if (ia6) {
587: if (!ip6_setdstifaddr(m, ia6)) {
588: /*
589: * XXX maybe we should drop the packet here,
590: * as we could not provide enough information
591: * to the upper layers.
592: */
593: }
594: }
595: }
596:
597: /*
1.2 itojun 598: * Process Hop-by-Hop options header if it's contained.
599: * m may be modified in ip6_hopopts_input().
600: * If a JumboPayload option is included, plen will also be modified.
601: */
602: plen = (u_int32_t)ntohs(ip6->ip6_plen);
603: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 604: struct ip6_hbh *hbh;
605:
606: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
607: #if 0 /*touches NULL pointer*/
608: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
609: #endif
1.2 itojun 610: return; /* m have already been freed */
1.9 itojun 611: }
1.22 itojun 612:
1.2 itojun 613: /* adjust pointer */
614: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 615:
616: /*
1.49 itojun 617: * if the payload length field is 0 and the next header field
1.22 itojun 618: * indicates Hop-by-Hop Options header, then a Jumbo Payload
619: * option MUST be included.
620: */
621: if (ip6->ip6_plen == 0 && plen == 0) {
622: /*
623: * Note that if a valid jumbo payload option is
1.83 rpaulo 624: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 625: * (non-zero) payload length to the variable plen.
1.22 itojun 626: */
627: ip6stat.ip6s_badoptions++;
628: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
629: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
630: icmp6_error(m, ICMP6_PARAM_PROB,
631: ICMP6_PARAMPROB_HEADER,
632: (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
633: return;
634: }
1.9 itojun 635: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
636: sizeof(struct ip6_hbh));
637: if (hbh == NULL) {
638: ip6stat.ip6s_tooshort++;
639: return;
640: }
1.57 thorpej 641: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 642: nxt = hbh->ip6h_nxt;
1.2 itojun 643:
644: /*
645: * accept the packet if a router alert option is included
646: * and we act as an IPv6 router.
647: */
1.5 itojun 648: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 649: ours = 1;
650: } else
651: nxt = ip6->ip6_nxt;
652:
653: /*
654: * Check that the amount of data in the buffers
655: * is as at least much as the IPv6 header would have us expect.
656: * Trim mbufs if longer than we expect.
657: * Drop packet if shorter than we expect.
658: */
659: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
660: ip6stat.ip6s_tooshort++;
1.9 itojun 661: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 662: goto bad;
663: }
664: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
665: if (m->m_len == m->m_pkthdr.len) {
666: m->m_len = sizeof(struct ip6_hdr) + plen;
667: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
668: } else
669: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
670: }
671:
672: /*
673: * Forward if desirable.
674: */
675: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
676: /*
677: * If we are acting as a multicast router, all
678: * incoming multicast packets are passed to the
679: * kernel-level multicast forwarding function.
680: * The packet is returned (relatively) intact; if
681: * ip6_mforward() returns a non-zero value, the packet
682: * must be discarded, else it may be accepted below.
683: */
684: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
685: ip6stat.ip6s_cantforward++;
686: m_freem(m);
687: return;
688: }
689: if (!ours) {
690: m_freem(m);
691: return;
692: }
1.22 itojun 693: } else if (!ours) {
1.64 itojun 694: ip6_forward(m, srcrt);
1.2 itojun 695: return;
1.56 itojun 696: }
1.25 itojun 697:
698: ip6 = mtod(m, struct ip6_hdr *);
699:
700: /*
701: * Malicious party may be able to use IPv4 mapped addr to confuse
702: * tcp/udp stack and bypass security checks (act as if it was from
703: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
704: *
705: * For SIIT end node behavior, you may want to disable the check.
706: * However, you will become vulnerable to attacks using IPv4 mapped
707: * source.
708: */
709: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
710: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
711: ip6stat.ip6s_badscope++;
712: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
713: goto bad;
714: }
1.2 itojun 715:
716: /*
717: * Tell launch routine the next header
718: */
1.12 itojun 719: #ifdef IFA_STATS
1.28 itojun 720: if (deliverifp != NULL) {
1.9 itojun 721: struct in6_ifaddr *ia6;
722: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
723: if (ia6)
724: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
725: }
726: #endif
1.2 itojun 727: ip6stat.ip6s_delivered++;
1.9 itojun 728: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 729: nest = 0;
1.40 itojun 730:
1.2 itojun 731: while (nxt != IPPROTO_DONE) {
732: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
733: ip6stat.ip6s_toomanyhdr++;
734: goto bad;
735: }
1.8 itojun 736:
737: /*
738: * protection against faulty packet - there should be
739: * more sanity checks in header chain processing.
740: */
741: if (m->m_pkthdr.len < off) {
742: ip6stat.ip6s_tooshort++;
1.9 itojun 743: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 744: goto bad;
745: }
746:
1.37 itojun 747: #ifdef IPSEC
748: /*
749: * enforce IPsec policy checking if we are seeing last header.
750: * note that we do not visit this with protocols with pcb layer
751: * code - like udp/tcp/raw ip.
752: */
753: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
754: ipsec6_in_reject(m, NULL)) {
755: ipsec6stat.in_polvio++;
756: goto bad;
757: }
758: #endif
1.56 itojun 759:
1.2 itojun 760: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
761: }
762: return;
763: bad:
764: m_freem(m);
765: }
766:
767: /*
1.81 rpaulo 768: * set/grab in6_ifaddr correspond to IPv6 destination address.
769: */
770: static struct m_tag *
771: ip6_setdstifaddr(m, ia6)
772: struct mbuf *m;
773: struct in6_ifaddr *ia6;
774: {
775: struct m_tag *mtag;
776:
777: mtag = ip6_addaux(m);
778: if (mtag)
779: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
780: return mtag; /* NULL if failed to set */
781: }
782:
783: struct in6_ifaddr *
784: ip6_getdstifaddr(m)
785: struct mbuf *m;
786: {
787: struct m_tag *mtag;
788:
789: mtag = ip6_findaux(m);
790: if (mtag)
791: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
792: else
793: return NULL;
794: }
795:
796: /*
1.2 itojun 797: * Hop-by-Hop options header processing. If a valid jumbo payload option is
798: * included, the real payload length will be stored in plenp.
799: */
800: static int
801: ip6_hopopts_input(plenp, rtalertp, mp, offp)
802: u_int32_t *plenp;
1.5 itojun 803: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 804: struct mbuf **mp;
805: int *offp;
806: {
1.35 itojun 807: struct mbuf *m = *mp;
1.2 itojun 808: int off = *offp, hbhlen;
809: struct ip6_hbh *hbh;
810:
811: /* validation of the length of the header */
1.9 itojun 812: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
813: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
814: if (hbh == NULL) {
815: ip6stat.ip6s_tooshort++;
816: return -1;
817: }
818: hbhlen = (hbh->ip6h_len + 1) << 3;
819: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
820: hbhlen);
821: if (hbh == NULL) {
822: ip6stat.ip6s_tooshort++;
823: return -1;
824: }
1.57 thorpej 825: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 826: off += hbhlen;
827: hbhlen -= sizeof(struct ip6_hbh);
828:
829: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
830: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 831: return (-1);
1.2 itojun 832:
833: *offp = off;
834: *mp = m;
1.58 itojun 835: return (0);
1.2 itojun 836: }
837:
838: /*
839: * Search header for all Hop-by-hop options and process each option.
840: * This function is separate from ip6_hopopts_input() in order to
841: * handle a case where the sending node itself process its hop-by-hop
842: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 843: *
844: * The function assumes that hbh header is located right after the IPv6 header
845: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
846: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 847: */
848: int
849: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
850: struct mbuf *m;
851: u_int8_t *opthead;
852: int hbhlen;
1.5 itojun 853: u_int32_t *rtalertp;
1.2 itojun 854: u_int32_t *plenp;
855: {
856: struct ip6_hdr *ip6;
857: int optlen = 0;
858: u_int8_t *opt = opthead;
859: u_int16_t rtalert_val;
1.22 itojun 860: u_int32_t jumboplen;
1.55 itojun 861: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 862:
863: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 864: switch (*opt) {
865: case IP6OPT_PAD1:
866: optlen = 1;
867: break;
868: case IP6OPT_PADN:
869: if (hbhlen < IP6OPT_MINLEN) {
870: ip6stat.ip6s_toosmall++;
871: goto bad;
872: }
873: optlen = *(opt + 1) + 2;
874: break;
875: case IP6OPT_RTALERT:
876: /* XXX may need check for alignment */
877: if (hbhlen < IP6OPT_RTALERT_LEN) {
878: ip6stat.ip6s_toosmall++;
879: goto bad;
880: }
881: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 882: /* XXX stat */
883: icmp6_error(m, ICMP6_PARAM_PROB,
884: ICMP6_PARAMPROB_HEADER,
885: erroff + opt + 1 - opthead);
886: return (-1);
1.35 itojun 887: }
888: optlen = IP6OPT_RTALERT_LEN;
889: bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
890: *rtalertp = ntohs(rtalert_val);
891: break;
892: case IP6OPT_JUMBO:
1.22 itojun 893: /* XXX may need check for alignment */
894: if (hbhlen < IP6OPT_JUMBO_LEN) {
895: ip6stat.ip6s_toosmall++;
896: goto bad;
897: }
1.35 itojun 898: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 899: /* XXX stat */
900: icmp6_error(m, ICMP6_PARAM_PROB,
901: ICMP6_PARAMPROB_HEADER,
902: erroff + opt + 1 - opthead);
903: return (-1);
1.35 itojun 904: }
1.22 itojun 905: optlen = IP6OPT_JUMBO_LEN;
906:
907: /*
908: * IPv6 packets that have non 0 payload length
1.35 itojun 909: * must not contain a jumbo payload option.
1.22 itojun 910: */
911: ip6 = mtod(m, struct ip6_hdr *);
912: if (ip6->ip6_plen) {
913: ip6stat.ip6s_badoptions++;
914: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 915: ICMP6_PARAMPROB_HEADER,
916: erroff + opt - opthead);
917: return (-1);
1.22 itojun 918: }
1.2 itojun 919:
1.22 itojun 920: /*
921: * We may see jumbolen in unaligned location, so
922: * we'd need to perform bcopy().
923: */
924: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
925: jumboplen = (u_int32_t)htonl(jumboplen);
926:
927: #if 1
928: /*
929: * if there are multiple jumbo payload options,
930: * *plenp will be non-zero and the packet will be
931: * rejected.
932: * the behavior may need some debate in ipngwg -
933: * multiple options does not make sense, however,
934: * there's no explicit mention in specification.
935: */
936: if (*plenp != 0) {
937: ip6stat.ip6s_badoptions++;
938: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 939: ICMP6_PARAMPROB_HEADER,
940: erroff + opt + 2 - opthead);
941: return (-1);
1.22 itojun 942: }
1.8 itojun 943: #endif
1.2 itojun 944:
1.22 itojun 945: /*
946: * jumbo payload length must be larger than 65535.
947: */
948: if (jumboplen <= IPV6_MAXPACKET) {
949: ip6stat.ip6s_badoptions++;
950: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 951: ICMP6_PARAMPROB_HEADER,
952: erroff + opt + 2 - opthead);
953: return (-1);
1.22 itojun 954: }
955: *plenp = jumboplen;
956:
957: break;
1.35 itojun 958: default: /* unknown option */
959: if (hbhlen < IP6OPT_MINLEN) {
960: ip6stat.ip6s_toosmall++;
961: goto bad;
962: }
1.55 itojun 963: optlen = ip6_unknown_opt(opt, m,
964: erroff + opt - opthead);
965: if (optlen == -1)
966: return (-1);
1.35 itojun 967: optlen += 2;
968: break;
1.2 itojun 969: }
970: }
971:
1.55 itojun 972: return (0);
1.2 itojun 973:
974: bad:
975: m_freem(m);
1.55 itojun 976: return (-1);
1.2 itojun 977: }
978:
979: /*
980: * Unknown option processing.
981: * The third argument `off' is the offset from the IPv6 header to the option,
982: * which is necessary if the IPv6 header the and option header and IPv6 header
983: * is not continuous in order to return an ICMPv6 error.
984: */
985: int
986: ip6_unknown_opt(optp, m, off)
987: u_int8_t *optp;
988: struct mbuf *m;
989: int off;
990: {
991: struct ip6_hdr *ip6;
992:
1.35 itojun 993: switch (IP6OPT_TYPE(*optp)) {
994: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 995: return ((int)*(optp + 1));
1.35 itojun 996: case IP6OPT_TYPE_DISCARD: /* silently discard */
997: m_freem(m);
1.58 itojun 998: return (-1);
1.35 itojun 999: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1000: ip6stat.ip6s_badoptions++;
1001: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1002: return (-1);
1.35 itojun 1003: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1004: ip6stat.ip6s_badoptions++;
1005: ip6 = mtod(m, struct ip6_hdr *);
1006: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1007: (m->m_flags & (M_BCAST|M_MCAST)))
1008: m_freem(m);
1009: else
1010: icmp6_error(m, ICMP6_PARAM_PROB,
1011: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1012: return (-1);
1.2 itojun 1013: }
1014:
1015: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1016: return (-1);
1.2 itojun 1017: }
1018:
1019: /*
1.9 itojun 1020: * Create the "control" list for this pcb.
1021: *
1022: * The routine will be called from upper layer handlers like tcp6_input().
1023: * Thus the routine assumes that the caller (tcp6_input) have already
1024: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1025: * very first mbuf on the mbuf chain.
1026: * We may want to add some infinite loop prevention or sanity checks for safety.
1027: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1028: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1029: */
1030: void
1031: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 1032: struct in6pcb *in6p;
1033: struct mbuf **mp;
1034: struct ip6_hdr *ip6;
1035: struct mbuf *m;
1.2 itojun 1036: {
1.85 rpaulo 1037: #ifdef RFC2292
1038: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1039: #else
1040: #define IS2292(x, y) (y)
1041: #endif
1042:
1.9 itojun 1043: #ifdef SO_TIMESTAMP
1.2 itojun 1044: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1045: struct timeval tv;
1046:
1047: microtime(&tv);
1048: *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
1.63 itojun 1049: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1050: if (*mp)
1051: mp = &(*mp)->m_next;
1052: }
1.9 itojun 1053: #endif
1.87 rpaulo 1054:
1055: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1056: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1057: return;
1058:
1.2 itojun 1059: /* RFC 2292 sec. 5 */
1.35 itojun 1060: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1061: struct in6_pktinfo pi6;
1.85 rpaulo 1062:
1.2 itojun 1063: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1064: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1065: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1066: m->m_pkthdr.rcvif->if_index : 0;
1.2 itojun 1067: *mp = sbcreatecontrol((caddr_t) &pi6,
1.85 rpaulo 1068: sizeof(struct in6_pktinfo),
1069: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1070: if (*mp)
1071: mp = &(*mp)->m_next;
1072: }
1.85 rpaulo 1073:
1.2 itojun 1074: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1075: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1076:
1.63 itojun 1077: *mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),
1.85 rpaulo 1078: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1079: if (*mp)
1080: mp = &(*mp)->m_next;
1081: }
1082:
1083: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1084: u_int32_t flowinfo;
1085: int tclass;
1086:
1087: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1088: flowinfo >>= 20;
1089:
1090: tclass = flowinfo & 0xff;
1091: *mp = sbcreatecontrol((caddr_t)&tclass, sizeof(tclass),
1092: IPV6_TCLASS, IPPROTO_IPV6);
1093:
1.2 itojun 1094: if (*mp)
1095: mp = &(*mp)->m_next;
1096: }
1097:
1098: /*
1.75 itojun 1099: * IPV6_HOPOPTS socket option. Recall that we required super-user
1100: * privilege for the option (see ip6_ctloutput), but it might be too
1101: * strict, since there might be some hop-by-hop options which can be
1102: * returned to normal user.
1.85 rpaulo 1103: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1104: */
1.75 itojun 1105: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1106: /*
1107: * Check if a hop-by-hop options header is contatined in the
1108: * received packet, and if so, store the options as ancillary
1109: * data. Note that a hop-by-hop options header must be
1110: * just after the IPv6 header, which fact is assured through
1111: * the IPv6 input processing.
1112: */
1.78 christos 1113: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1114: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1115: struct ip6_hbh *hbh;
1116: int hbhlen;
1.62 itojun 1117: struct mbuf *ext;
1.9 itojun 1118:
1.62 itojun 1119: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1120: xip6->ip6_nxt);
1.62 itojun 1121: if (ext == NULL) {
1.9 itojun 1122: ip6stat.ip6s_tooshort++;
1123: return;
1124: }
1.62 itojun 1125: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1126: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1127: if (hbhlen != ext->m_len) {
1128: m_freem(ext);
1.9 itojun 1129: ip6stat.ip6s_tooshort++;
1130: return;
1131: }
1.2 itojun 1132:
1133: /*
1134: * XXX: We copy whole the header even if a jumbo
1135: * payload option is included, which option is to
1136: * be removed before returning in the RFC 2292.
1.85 rpaulo 1137: * Note: this constraint is removed in RFC3542.
1.2 itojun 1138: */
1.9 itojun 1139: *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
1.85 rpaulo 1140: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1141: IPPROTO_IPV6);
1.2 itojun 1142: if (*mp)
1143: mp = &(*mp)->m_next;
1.62 itojun 1144: m_freem(ext);
1.2 itojun 1145: }
1146: }
1147:
1148: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1149: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1150: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1151: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1152:
1153: /*
1154: * Search for destination options headers or routing
1155: * header(s) through the header chain, and stores each
1156: * header as ancillary data.
1157: * Note that the order of the headers remains in
1158: * the chain of ancillary data.
1159: */
1.86 rpaulo 1160: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1161: struct ip6_ext *ip6e = NULL;
1.9 itojun 1162: int elen;
1.62 itojun 1163: struct mbuf *ext = NULL;
1.9 itojun 1164:
1.62 itojun 1165: /*
1166: * if it is not an extension header, don't try to
1167: * pull it from the chain.
1168: */
1169: switch (nxt) {
1170: case IPPROTO_DSTOPTS:
1171: case IPPROTO_ROUTING:
1172: case IPPROTO_HOPOPTS:
1173: case IPPROTO_AH: /* is it possible? */
1174: break;
1175: default:
1176: goto loopend;
1177: }
1178:
1179: ext = ip6_pullexthdr(m, off, nxt);
1180: if (ext == NULL) {
1.9 itojun 1181: ip6stat.ip6s_tooshort++;
1182: return;
1183: }
1.62 itojun 1184: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1185: if (nxt == IPPROTO_AH)
1186: elen = (ip6e->ip6e_len + 2) << 2;
1187: else
1188: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1189: if (elen != ext->m_len) {
1190: m_freem(ext);
1.9 itojun 1191: ip6stat.ip6s_tooshort++;
1192: return;
1193: }
1.57 thorpej 1194: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1195:
1.35 itojun 1196: switch (nxt) {
1.62 itojun 1197: case IPPROTO_DSTOPTS:
1.35 itojun 1198: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1199: break;
1200:
1201: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.85 rpaulo 1202: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1203: IPPROTO_IPV6);
1.35 itojun 1204: if (*mp)
1205: mp = &(*mp)->m_next;
1206: break;
1207:
1208: case IPPROTO_ROUTING:
1209: if (!in6p->in6p_flags & IN6P_RTHDR)
1210: break;
1211:
1212: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.85 rpaulo 1213: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1214: IPPROTO_IPV6);
1.35 itojun 1215: if (*mp)
1216: mp = &(*mp)->m_next;
1217: break;
1218:
1.62 itojun 1219: case IPPROTO_HOPOPTS:
1220: case IPPROTO_AH: /* is it possible? */
1221: break;
1222:
1.35 itojun 1223: default:
1224: /*
1.62 itojun 1225: * other cases have been filtered in the above.
1226: * none will visit this case. here we supply
1227: * the code just in case (nxt overwritten or
1228: * other cases).
1.35 itojun 1229: */
1.62 itojun 1230: m_freem(ext);
1.35 itojun 1231: goto loopend;
1232:
1.2 itojun 1233: }
1234:
1235: /* proceed with the next header. */
1.9 itojun 1236: off += elen;
1.2 itojun 1237: nxt = ip6e->ip6e_nxt;
1.62 itojun 1238: ip6e = NULL;
1239: m_freem(ext);
1240: ext = NULL;
1.2 itojun 1241: }
1242: loopend:
1.62 itojun 1243: ;
1.2 itojun 1244: }
1.62 itojun 1245: }
1.85 rpaulo 1246: #undef IS2292
1247:
1248:
1249: void
1250: ip6_notify_pmtu(struct in6pcb *in6p, struct sockaddr_in6 *dst, uint32_t *mtu)
1251: {
1252: struct socket *so;
1253: struct mbuf *m_mtu;
1254: struct ip6_mtuinfo mtuctl;
1255:
1256: so = in6p->in6p_socket;
1257:
1258: if (mtu == NULL)
1259: return;
1260:
1261: #ifdef DIAGNOSTIC
1262: if (so == NULL) /* I believe this is impossible */
1263: panic("ip6_notify_pmtu: socket is NULL");
1264: #endif
1265:
1266: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1267: mtuctl.ip6m_mtu = *mtu;
1268: mtuctl.ip6m_addr = *dst;
1269: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1270: return;
1271:
1272: if ((m_mtu = sbcreatecontrol((caddr_t)&mtuctl, sizeof(mtuctl),
1273: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1274: return;
1275:
1276: if (sbappendaddr(&so->so_rcv, (struct sockaddr *)dst, NULL, m_mtu)
1277: == 0) {
1278: m_freem(m_mtu);
1279: /* XXX: should count statistics */
1280: } else
1281: sorwakeup(so);
1282:
1283: return;
1284: }
1.62 itojun 1285:
1286: /*
1287: * pull single extension header from mbuf chain. returns single mbuf that
1288: * contains the result, or NULL on error.
1289: */
1290: static struct mbuf *
1291: ip6_pullexthdr(m, off, nxt)
1292: struct mbuf *m;
1293: size_t off;
1294: int nxt;
1295: {
1296: struct ip6_ext ip6e;
1297: size_t elen;
1298: struct mbuf *n;
1299:
1300: #ifdef DIAGNOSTIC
1301: switch (nxt) {
1302: case IPPROTO_DSTOPTS:
1303: case IPPROTO_ROUTING:
1304: case IPPROTO_HOPOPTS:
1305: case IPPROTO_AH: /* is it possible? */
1306: break;
1307: default:
1308: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1309: }
1.62 itojun 1310: #endif
1.2 itojun 1311:
1.62 itojun 1312: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1313: if (nxt == IPPROTO_AH)
1314: elen = (ip6e.ip6e_len + 2) << 2;
1315: else
1316: elen = (ip6e.ip6e_len + 1) << 3;
1317:
1318: MGET(n, M_DONTWAIT, MT_DATA);
1319: if (n && elen >= MLEN) {
1320: MCLGET(n, M_DONTWAIT);
1321: if ((n->m_flags & M_EXT) == 0) {
1322: m_free(n);
1323: n = NULL;
1324: }
1325: }
1326: if (!n)
1327: return NULL;
1328:
1329: n->m_len = 0;
1330: if (elen >= M_TRAILINGSPACE(n)) {
1331: m_free(n);
1332: return NULL;
1333: }
1334:
1335: m_copydata(m, off, elen, mtod(n, caddr_t));
1336: n->m_len = elen;
1337: return n;
1.2 itojun 1338: }
1339:
1340: /*
1341: * Get pointer to the previous header followed by the header
1342: * currently processed.
1343: * XXX: This function supposes that
1344: * M includes all headers,
1345: * the next header field and the header length field of each header
1346: * are valid, and
1347: * the sum of each header length equals to OFF.
1348: * Because of these assumptions, this function must be called very
1349: * carefully. Moreover, it will not be used in the near future when
1350: * we develop `neater' mechanism to process extension headers.
1351: */
1.58 itojun 1352: u_int8_t *
1.2 itojun 1353: ip6_get_prevhdr(m, off)
1354: struct mbuf *m;
1355: int off;
1356: {
1357: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1358:
1359: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1360: return (&ip6->ip6_nxt);
1.2 itojun 1361: else {
1362: int len, nxt;
1363: struct ip6_ext *ip6e = NULL;
1364:
1365: nxt = ip6->ip6_nxt;
1366: len = sizeof(struct ip6_hdr);
1367: while (len < off) {
1368: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
1369:
1.35 itojun 1370: switch (nxt) {
1.2 itojun 1371: case IPPROTO_FRAGMENT:
1372: len += sizeof(struct ip6_frag);
1373: break;
1374: case IPPROTO_AH:
1375: len += (ip6e->ip6e_len + 2) << 2;
1376: break;
1377: default:
1378: len += (ip6e->ip6e_len + 1) << 3;
1379: break;
1380: }
1381: nxt = ip6e->ip6e_nxt;
1382: }
1383: if (ip6e)
1.58 itojun 1384: return (&ip6e->ip6e_nxt);
1.2 itojun 1385: else
1386: return NULL;
1.18 itojun 1387: }
1388: }
1389:
1390: /*
1391: * get next header offset. m will be retained.
1392: */
1393: int
1394: ip6_nexthdr(m, off, proto, nxtp)
1395: struct mbuf *m;
1396: int off;
1397: int proto;
1398: int *nxtp;
1399: {
1400: struct ip6_hdr ip6;
1401: struct ip6_ext ip6e;
1402: struct ip6_frag fh;
1403:
1404: /* just in case */
1405: if (m == NULL)
1406: panic("ip6_nexthdr: m == NULL");
1407: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1408: return -1;
1409:
1410: switch (proto) {
1411: case IPPROTO_IPV6:
1.83 rpaulo 1412: /* do not chase beyond intermediate IPv6 headers */
1413: if (off != 0)
1414: return -1;
1.18 itojun 1415: if (m->m_pkthdr.len < off + sizeof(ip6))
1416: return -1;
1417: m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
1418: if (nxtp)
1419: *nxtp = ip6.ip6_nxt;
1420: off += sizeof(ip6);
1421: return off;
1422:
1423: case IPPROTO_FRAGMENT:
1424: /*
1425: * terminate parsing if it is not the first fragment,
1426: * it does not make sense to parse through it.
1427: */
1428: if (m->m_pkthdr.len < off + sizeof(fh))
1429: return -1;
1430: m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
1.67 itojun 1431: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1432: return -1;
1433: if (nxtp)
1434: *nxtp = fh.ip6f_nxt;
1435: off += sizeof(struct ip6_frag);
1436: return off;
1437:
1438: case IPPROTO_AH:
1439: if (m->m_pkthdr.len < off + sizeof(ip6e))
1440: return -1;
1441: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1442: if (nxtp)
1443: *nxtp = ip6e.ip6e_nxt;
1444: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1445: if (m->m_pkthdr.len < off)
1446: return -1;
1.18 itojun 1447: return off;
1448:
1449: case IPPROTO_HOPOPTS:
1450: case IPPROTO_ROUTING:
1451: case IPPROTO_DSTOPTS:
1452: if (m->m_pkthdr.len < off + sizeof(ip6e))
1453: return -1;
1454: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1455: if (nxtp)
1456: *nxtp = ip6e.ip6e_nxt;
1457: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1458: if (m->m_pkthdr.len < off)
1459: return -1;
1.18 itojun 1460: return off;
1461:
1462: case IPPROTO_NONE:
1463: case IPPROTO_ESP:
1464: case IPPROTO_IPCOMP:
1465: /* give up */
1466: return -1;
1467:
1468: default:
1469: return -1;
1470: }
1471: }
1472:
1473: /*
1474: * get offset for the last header in the chain. m will be kept untainted.
1475: */
1476: int
1477: ip6_lasthdr(m, off, proto, nxtp)
1478: struct mbuf *m;
1479: int off;
1480: int proto;
1481: int *nxtp;
1482: {
1483: int newoff;
1484: int nxt;
1485:
1486: if (!nxtp) {
1487: nxt = -1;
1488: nxtp = &nxt;
1489: }
1.86 rpaulo 1490: for (;;) {
1.18 itojun 1491: newoff = ip6_nexthdr(m, off, proto, nxtp);
1492: if (newoff < 0)
1493: return off;
1494: else if (newoff < off)
1495: return -1; /* invalid */
1496: else if (newoff == off)
1497: return newoff;
1498:
1499: off = newoff;
1500: proto = *nxtp;
1.2 itojun 1501: }
1502: }
1503:
1.81 rpaulo 1504: struct m_tag *
1505: ip6_addaux(m)
1506: struct mbuf *m;
1507: {
1508: struct m_tag *mtag;
1509:
1510: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1511: if (!mtag) {
1512: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1513: M_NOWAIT);
1514: if (mtag) {
1515: m_tag_prepend(m, mtag);
1516: bzero(mtag + 1, sizeof(struct ip6aux));
1517: }
1518: }
1519: return mtag;
1520: }
1521:
1522: struct m_tag *
1523: ip6_findaux(m)
1524: struct mbuf *m;
1525: {
1526: struct m_tag *mtag;
1527:
1528: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1529: return mtag;
1530: }
1531:
1532: void
1533: ip6_delaux(m)
1534: struct mbuf *m;
1535: {
1536: struct m_tag *mtag;
1537:
1538: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1539: if (mtag)
1540: m_tag_delete(m, mtag);
1541: }
1542:
1.2 itojun 1543: /*
1544: * System control for IP6
1545: */
1546:
1547: u_char inet6ctlerrmap[PRC_NCMDS] = {
1548: 0, 0, 0, 0,
1549: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1550: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1551: EMSGSIZE, EHOSTUNREACH, 0, 0,
1552: 0, 0, 0, 0,
1553: ENOPROTOOPT
1554: };
1555:
1.70 atatat 1556: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1557: {
1.85 rpaulo 1558: #ifdef RFC2292
1559: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1560: #else
1561: #define IS2292(x, y) (y)
1562: #endif
1.26 itojun 1563:
1.73 atatat 1564: sysctl_createv(clog, 0, NULL, NULL,
1565: CTLFLAG_PERMANENT,
1.70 atatat 1566: CTLTYPE_NODE, "net", NULL,
1567: NULL, 0, NULL, 0,
1568: CTL_NET, CTL_EOL);
1.73 atatat 1569: sysctl_createv(clog, 0, NULL, NULL,
1570: CTLFLAG_PERMANENT,
1.74 atatat 1571: CTLTYPE_NODE, "inet6",
1572: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1573: NULL, 0, NULL, 0,
1574: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1575: sysctl_createv(clog, 0, NULL, NULL,
1576: CTLFLAG_PERMANENT,
1.74 atatat 1577: CTLTYPE_NODE, "ip6",
1578: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1579: NULL, 0, NULL, 0,
1580: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1581:
1.73 atatat 1582: sysctl_createv(clog, 0, NULL, NULL,
1583: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1584: CTLTYPE_INT, "forwarding",
1585: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1586: NULL, 0, &ip6_forwarding, 0,
1587: CTL_NET, PF_INET6, IPPROTO_IPV6,
1588: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1589: sysctl_createv(clog, 0, NULL, NULL,
1590: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1591: CTLTYPE_INT, "redirect",
1592: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1593: NULL, 0, &ip6_sendredirects, 0,
1594: CTL_NET, PF_INET6, IPPROTO_IPV6,
1595: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1596: sysctl_createv(clog, 0, NULL, NULL,
1597: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1598: CTLTYPE_INT, "hlim",
1599: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1600: NULL, 0, &ip6_defhlim, 0,
1601: CTL_NET, PF_INET6, IPPROTO_IPV6,
1602: IPV6CTL_DEFHLIM, CTL_EOL);
1603: #ifdef notyet
1.73 atatat 1604: sysctl_createv(clog, 0, NULL, NULL,
1605: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1606: CTLTYPE_INT, "mtu", NULL,
1607: NULL, 0, &, 0,
1608: CTL_NET, PF_INET6, IPPROTO_IPV6,
1609: IPV6CTL_DEFMTU, CTL_EOL);
1610: #endif
1611: #ifdef __no_idea__
1.73 atatat 1612: sysctl_createv(clog, 0, NULL, NULL,
1613: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1614: CTLTYPE_INT, "forwsrcrt", NULL,
1615: NULL, 0, &?, 0,
1616: CTL_NET, PF_INET6, IPPROTO_IPV6,
1617: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1618: sysctl_createv(clog, 0, NULL, NULL,
1619: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1620: CTLTYPE_STRUCT, "mrtstats", NULL,
1621: NULL, 0, &?, sizeof(?),
1622: CTL_NET, PF_INET6, IPPROTO_IPV6,
1623: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1624: sysctl_createv(clog, 0, NULL, NULL,
1625: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1626: CTLTYPE_?, "mrtproto", NULL,
1627: NULL, 0, &?, sizeof(?),
1628: CTL_NET, PF_INET6, IPPROTO_IPV6,
1629: IPV6CTL_MRTPROTO, CTL_EOL);
1630: #endif
1.73 atatat 1631: sysctl_createv(clog, 0, NULL, NULL,
1632: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1633: CTLTYPE_INT, "maxfragpackets",
1634: SYSCTL_DESCR("Maximum number of fragments to buffer "
1635: "for reassembly"),
1.70 atatat 1636: NULL, 0, &ip6_maxfragpackets, 0,
1637: CTL_NET, PF_INET6, IPPROTO_IPV6,
1638: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1639: #ifdef __no_idea__
1.73 atatat 1640: sysctl_createv(clog, 0, NULL, NULL,
1641: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1642: CTLTYPE_INT, "sourcecheck", NULL,
1643: NULL, 0, &?, 0,
1644: CTL_NET, PF_INET6, IPPROTO_IPV6,
1645: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1646: sysctl_createv(clog, 0, NULL, NULL,
1647: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1648: CTLTYPE_INT, "sourcecheck_logint", NULL,
1649: NULL, 0, &?, 0,
1650: CTL_NET, PF_INET6, IPPROTO_IPV6,
1651: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1652: #endif
1.73 atatat 1653: sysctl_createv(clog, 0, NULL, NULL,
1654: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1655: CTLTYPE_INT, "accept_rtadv",
1656: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1657: NULL, 0, &ip6_accept_rtadv, 0,
1658: CTL_NET, PF_INET6, IPPROTO_IPV6,
1659: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1660: sysctl_createv(clog, 0, NULL, NULL,
1661: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1662: CTLTYPE_INT, "keepfaith",
1663: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1664: NULL, 0, &ip6_keepfaith, 0,
1665: CTL_NET, PF_INET6, IPPROTO_IPV6,
1666: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1667: sysctl_createv(clog, 0, NULL, NULL,
1668: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1669: CTLTYPE_INT, "log_interval",
1670: SYSCTL_DESCR("Minumum interval between logging "
1671: "unroutable packets"),
1.70 atatat 1672: NULL, 0, &ip6_log_interval, 0,
1673: CTL_NET, PF_INET6, IPPROTO_IPV6,
1674: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1675: sysctl_createv(clog, 0, NULL, NULL,
1676: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1677: CTLTYPE_INT, "hdrnestlimit",
1678: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1679: NULL, 0, &ip6_hdrnestlimit, 0,
1680: CTL_NET, PF_INET6, IPPROTO_IPV6,
1681: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1682: sysctl_createv(clog, 0, NULL, NULL,
1683: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1684: CTLTYPE_INT, "dad_count",
1685: SYSCTL_DESCR("Number of Duplicate Address Detection "
1686: "probes to send"),
1.70 atatat 1687: NULL, 0, &ip6_dad_count, 0,
1688: CTL_NET, PF_INET6, IPPROTO_IPV6,
1689: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1690: sysctl_createv(clog, 0, NULL, NULL,
1691: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1692: CTLTYPE_INT, "auto_flowlabel",
1693: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1694: NULL, 0, &ip6_auto_flowlabel, 0,
1695: CTL_NET, PF_INET6, IPPROTO_IPV6,
1696: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1697: sysctl_createv(clog, 0, NULL, NULL,
1698: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1699: CTLTYPE_INT, "defmcasthlim",
1700: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1701: NULL, 0, &ip6_defmcasthlim, 0,
1702: CTL_NET, PF_INET6, IPPROTO_IPV6,
1703: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1704: #if NGIF > 0
1.73 atatat 1705: sysctl_createv(clog, 0, NULL, NULL,
1706: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1707: CTLTYPE_INT, "gifhlim",
1708: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1709: NULL, 0, &ip6_gif_hlim, 0,
1710: CTL_NET, PF_INET6, IPPROTO_IPV6,
1711: IPV6CTL_GIF_HLIM, CTL_EOL);
1712: #endif /* NGIF */
1.73 atatat 1713: sysctl_createv(clog, 0, NULL, NULL,
1714: CTLFLAG_PERMANENT,
1.74 atatat 1715: CTLTYPE_STRING, "kame_version",
1716: SYSCTL_DESCR("KAME Version"),
1.78 christos 1717: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1718: CTL_NET, PF_INET6, IPPROTO_IPV6,
1719: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1720: sysctl_createv(clog, 0, NULL, NULL,
1721: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1722: CTLTYPE_INT, "use_deprecated",
1723: SYSCTL_DESCR("Allow use of deprecated addresses as "
1724: "source addresses"),
1.70 atatat 1725: NULL, 0, &ip6_use_deprecated, 0,
1726: CTL_NET, PF_INET6, IPPROTO_IPV6,
1727: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1728: sysctl_createv(clog, 0, NULL, NULL,
1729: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1730: CTLTYPE_INT, "rr_prune", NULL,
1731: NULL, 0, &ip6_rr_prune, 0,
1732: CTL_NET, PF_INET6, IPPROTO_IPV6,
1733: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1734: sysctl_createv(clog, 0, NULL, NULL,
1735: CTLFLAG_PERMANENT
1.70 atatat 1736: #ifndef INET6_BINDV6ONLY
1.73 atatat 1737: |CTLFLAG_READWRITE,
1.70 atatat 1738: #endif
1.74 atatat 1739: CTLTYPE_INT, "v6only",
1740: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1741: "to PF_INET sockets"),
1.70 atatat 1742: NULL, 0, &ip6_v6only, 0,
1743: CTL_NET, PF_INET6, IPPROTO_IPV6,
1744: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1745: sysctl_createv(clog, 0, NULL, NULL,
1746: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1747: CTLTYPE_INT, "anonportmin",
1748: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1749: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1750: CTL_NET, PF_INET6, IPPROTO_IPV6,
1751: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1752: sysctl_createv(clog, 0, NULL, NULL,
1753: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1754: CTLTYPE_INT, "anonportmax",
1755: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1756: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1757: CTL_NET, PF_INET6, IPPROTO_IPV6,
1758: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1759: #ifndef IPNOPRIVPORTS
1.73 atatat 1760: sysctl_createv(clog, 0, NULL, NULL,
1761: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1762: CTLTYPE_INT, "lowportmin",
1763: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1764: "to assign"),
1.70 atatat 1765: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1766: CTL_NET, PF_INET6, IPPROTO_IPV6,
1767: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1768: sysctl_createv(clog, 0, NULL, NULL,
1769: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1770: CTLTYPE_INT, "lowportmax",
1771: SYSCTL_DESCR("Highest privileged ephemeral port number "
1772: "to assign"),
1.70 atatat 1773: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1774: CTL_NET, PF_INET6, IPPROTO_IPV6,
1775: IPV6CTL_LOWPORTMAX, CTL_EOL);
1776: #endif /* IPNOPRIVPORTS */
1.73 atatat 1777: sysctl_createv(clog, 0, NULL, NULL,
1778: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1779: CTLTYPE_INT, "use_tempaddr",
1780: SYSCTL_DESCR("Use temporary address"),
1781: NULL, 0, &ip6_use_tempaddr, 0,
1782: CTL_NET, PF_INET6, IPPROTO_IPV6,
1783: CTL_CREATE, CTL_EOL);
1784: sysctl_createv(clog, 0, NULL, NULL,
1785: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1786: CTLTYPE_INT, "temppltime",
1787: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1788: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1789: CTL_NET, PF_INET6, IPPROTO_IPV6,
1790: CTL_CREATE, CTL_EOL);
1791: sysctl_createv(clog, 0, NULL, NULL,
1792: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1793: CTLTYPE_INT, "tempvltime",
1794: SYSCTL_DESCR("valid lifetime of a temporary address"),
1795: NULL, 0, &ip6_temp_valid_lifetime, 0,
1796: CTL_NET, PF_INET6, IPPROTO_IPV6,
1797: CTL_CREATE, CTL_EOL);
1798: sysctl_createv(clog, 0, NULL, NULL,
1799: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1800: CTLTYPE_INT, "maxfrags",
1801: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1802: NULL, 0, &ip6_maxfrags, 0,
1803: CTL_NET, PF_INET6, IPPROTO_IPV6,
1804: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1805: sysctl_createv(clog, 0, NULL, NULL,
1806: CTLFLAG_PERMANENT,
1807: CTLTYPE_STRUCT, "stats",
1808: SYSCTL_DESCR("IPv6 statistics"),
1809: NULL, 0, &ip6stat, sizeof(ip6stat),
1810: CTL_NET, PF_INET6, IPPROTO_IPV6,
1811: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1812: sysctl_createv(clog, 0, NULL, NULL,
1813: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1814: CTLTYPE_INT, "use_defaultzone",
1815: SYSCTL_DESCR("Whether to use the default scope zones"),
1816: NULL, 0, &ip6_use_defzone, 0,
1817: CTL_NET, PF_INET6, IPPROTO_IPV6,
1818: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1819: sysctl_createv(clog, 0, NULL, NULL,
1820: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1821: CTLTYPE_INT, "mcast_pmtu",
1822: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1823: NULL, 0, &ip6_mcast_pmtu, 0,
1824: CTL_NET, PF_INET6, IPPROTO_IPV6,
1825: CTL_CREATE, CTL_EOL);
1.2 itojun 1826: }
CVSweb <webmaster@jp.NetBSD.org>