Annotation of src/sys/netinet6/ip6_input.c, Revision 1.91
1.91 ! dyoung 1: /* $NetBSD: ip6_input.c,v 1.90 2006/11/16 01:33:45 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>
1.91 ! dyoung 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.90 2006/11/16 01:33:45 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:
1.91 ! dyoung 461: if (ip6_forward_rt.ro_rt != NULL) {
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: */
1.91 ! dyoung 488: if (ip6_forward_rt.ro_rt != NULL &&
1.2 itojun 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) {
1.91 ! dyoung 531: if (ip6_forward_rt.ro_rt != NULL &&
! 532: ip6_forward_rt.ro_rt->rt_ifp != NULL &&
1.71 itojun 533: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 534: /* XXX do we need more sanity checks? */
535: ours = 1;
1.45 itojun 536: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 537: goto hbhcheck;
538: }
539: }
540: #endif
541:
542: #if 0
543: {
544: /*
545: * Last resort: check in6_ifaddr for incoming interface.
546: * The code is here until I update the "goto ours hack" code above
547: * working right.
548: */
549: struct ifaddr *ifa;
1.91 ! dyoung 550: TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) {
1.9 itojun 551: if (ifa->ifa_addr == NULL)
552: continue; /* just for safety */
553: if (ifa->ifa_addr->sa_family != AF_INET6)
554: continue;
555: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
556: ours = 1;
557: deliverifp = ifa->ifa_ifp;
1.2 itojun 558: goto hbhcheck;
559: }
560: }
1.9 itojun 561: }
1.2 itojun 562: #endif
563:
564: /*
565: * Now there is no reason to process the packet if it's not our own
566: * and we're not a router.
567: */
568: if (!ip6_forwarding) {
569: ip6stat.ip6s_cantforward++;
1.9 itojun 570: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 571: goto bad;
572: }
573:
574: hbhcheck:
575: /*
1.81 rpaulo 576: * record address information into m_tag, if we don't have one yet.
577: * note that we are unable to record it, if the address is not listed
578: * as our interface address (e.g. multicast addresses, addresses
579: * within FAITH prefixes and such).
580: */
581: if (deliverifp && !ip6_getdstifaddr(m)) {
582: struct in6_ifaddr *ia6;
583:
584: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
585: if (ia6) {
586: if (!ip6_setdstifaddr(m, ia6)) {
587: /*
588: * XXX maybe we should drop the packet here,
589: * as we could not provide enough information
590: * to the upper layers.
591: */
592: }
593: }
594: }
595:
596: /*
1.2 itojun 597: * Process Hop-by-Hop options header if it's contained.
598: * m may be modified in ip6_hopopts_input().
599: * If a JumboPayload option is included, plen will also be modified.
600: */
601: plen = (u_int32_t)ntohs(ip6->ip6_plen);
602: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 603: struct ip6_hbh *hbh;
604:
605: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
606: #if 0 /*touches NULL pointer*/
607: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
608: #endif
1.2 itojun 609: return; /* m have already been freed */
1.9 itojun 610: }
1.22 itojun 611:
1.2 itojun 612: /* adjust pointer */
613: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 614:
615: /*
1.49 itojun 616: * if the payload length field is 0 and the next header field
1.22 itojun 617: * indicates Hop-by-Hop Options header, then a Jumbo Payload
618: * option MUST be included.
619: */
620: if (ip6->ip6_plen == 0 && plen == 0) {
621: /*
622: * Note that if a valid jumbo payload option is
1.83 rpaulo 623: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 624: * (non-zero) payload length to the variable plen.
1.22 itojun 625: */
626: ip6stat.ip6s_badoptions++;
627: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
628: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
629: icmp6_error(m, ICMP6_PARAM_PROB,
630: ICMP6_PARAMPROB_HEADER,
631: (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
632: return;
633: }
1.9 itojun 634: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
635: sizeof(struct ip6_hbh));
636: if (hbh == NULL) {
637: ip6stat.ip6s_tooshort++;
638: return;
639: }
1.57 thorpej 640: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 641: nxt = hbh->ip6h_nxt;
1.2 itojun 642:
643: /*
644: * accept the packet if a router alert option is included
645: * and we act as an IPv6 router.
646: */
1.5 itojun 647: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 648: ours = 1;
649: } else
650: nxt = ip6->ip6_nxt;
651:
652: /*
653: * Check that the amount of data in the buffers
654: * is as at least much as the IPv6 header would have us expect.
655: * Trim mbufs if longer than we expect.
656: * Drop packet if shorter than we expect.
657: */
658: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
659: ip6stat.ip6s_tooshort++;
1.9 itojun 660: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 661: goto bad;
662: }
663: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
664: if (m->m_len == m->m_pkthdr.len) {
665: m->m_len = sizeof(struct ip6_hdr) + plen;
666: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
667: } else
668: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
669: }
670:
671: /*
672: * Forward if desirable.
673: */
674: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
675: /*
676: * If we are acting as a multicast router, all
677: * incoming multicast packets are passed to the
678: * kernel-level multicast forwarding function.
679: * The packet is returned (relatively) intact; if
680: * ip6_mforward() returns a non-zero value, the packet
681: * must be discarded, else it may be accepted below.
682: */
683: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
684: ip6stat.ip6s_cantforward++;
685: m_freem(m);
686: return;
687: }
688: if (!ours) {
689: m_freem(m);
690: return;
691: }
1.22 itojun 692: } else if (!ours) {
1.64 itojun 693: ip6_forward(m, srcrt);
1.2 itojun 694: return;
1.56 itojun 695: }
1.25 itojun 696:
697: ip6 = mtod(m, struct ip6_hdr *);
698:
699: /*
700: * Malicious party may be able to use IPv4 mapped addr to confuse
701: * tcp/udp stack and bypass security checks (act as if it was from
702: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
703: *
704: * For SIIT end node behavior, you may want to disable the check.
705: * However, you will become vulnerable to attacks using IPv4 mapped
706: * source.
707: */
708: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
709: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
710: ip6stat.ip6s_badscope++;
711: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
712: goto bad;
713: }
1.2 itojun 714:
715: /*
716: * Tell launch routine the next header
717: */
1.12 itojun 718: #ifdef IFA_STATS
1.28 itojun 719: if (deliverifp != NULL) {
1.9 itojun 720: struct in6_ifaddr *ia6;
721: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
722: if (ia6)
723: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
724: }
725: #endif
1.2 itojun 726: ip6stat.ip6s_delivered++;
1.9 itojun 727: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 728: nest = 0;
1.40 itojun 729:
1.2 itojun 730: while (nxt != IPPROTO_DONE) {
731: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
732: ip6stat.ip6s_toomanyhdr++;
733: goto bad;
734: }
1.8 itojun 735:
736: /*
737: * protection against faulty packet - there should be
738: * more sanity checks in header chain processing.
739: */
740: if (m->m_pkthdr.len < off) {
741: ip6stat.ip6s_tooshort++;
1.9 itojun 742: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 743: goto bad;
744: }
745:
1.37 itojun 746: #ifdef IPSEC
747: /*
748: * enforce IPsec policy checking if we are seeing last header.
749: * note that we do not visit this with protocols with pcb layer
750: * code - like udp/tcp/raw ip.
751: */
752: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
753: ipsec6_in_reject(m, NULL)) {
754: ipsec6stat.in_polvio++;
755: goto bad;
756: }
757: #endif
1.56 itojun 758:
1.2 itojun 759: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
760: }
761: return;
762: bad:
763: m_freem(m);
764: }
765:
766: /*
1.81 rpaulo 767: * set/grab in6_ifaddr correspond to IPv6 destination address.
768: */
769: static struct m_tag *
770: ip6_setdstifaddr(m, ia6)
771: struct mbuf *m;
772: struct in6_ifaddr *ia6;
773: {
774: struct m_tag *mtag;
775:
776: mtag = ip6_addaux(m);
777: if (mtag)
778: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
779: return mtag; /* NULL if failed to set */
780: }
781:
782: struct in6_ifaddr *
783: ip6_getdstifaddr(m)
784: struct mbuf *m;
785: {
786: struct m_tag *mtag;
787:
788: mtag = ip6_findaux(m);
789: if (mtag)
790: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
791: else
792: return NULL;
793: }
794:
795: /*
1.2 itojun 796: * Hop-by-Hop options header processing. If a valid jumbo payload option is
797: * included, the real payload length will be stored in plenp.
798: */
799: static int
800: ip6_hopopts_input(plenp, rtalertp, mp, offp)
801: u_int32_t *plenp;
1.5 itojun 802: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 803: struct mbuf **mp;
804: int *offp;
805: {
1.35 itojun 806: struct mbuf *m = *mp;
1.2 itojun 807: int off = *offp, hbhlen;
808: struct ip6_hbh *hbh;
809:
810: /* validation of the length of the header */
1.9 itojun 811: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
812: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
813: if (hbh == NULL) {
814: ip6stat.ip6s_tooshort++;
815: return -1;
816: }
817: hbhlen = (hbh->ip6h_len + 1) << 3;
818: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
819: hbhlen);
820: if (hbh == NULL) {
821: ip6stat.ip6s_tooshort++;
822: return -1;
823: }
1.57 thorpej 824: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 825: off += hbhlen;
826: hbhlen -= sizeof(struct ip6_hbh);
827:
828: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
829: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 830: return (-1);
1.2 itojun 831:
832: *offp = off;
833: *mp = m;
1.58 itojun 834: return (0);
1.2 itojun 835: }
836:
837: /*
838: * Search header for all Hop-by-hop options and process each option.
839: * This function is separate from ip6_hopopts_input() in order to
840: * handle a case where the sending node itself process its hop-by-hop
841: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 842: *
843: * The function assumes that hbh header is located right after the IPv6 header
844: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
845: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 846: */
847: int
848: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
849: struct mbuf *m;
850: u_int8_t *opthead;
851: int hbhlen;
1.5 itojun 852: u_int32_t *rtalertp;
1.2 itojun 853: u_int32_t *plenp;
854: {
855: struct ip6_hdr *ip6;
856: int optlen = 0;
857: u_int8_t *opt = opthead;
858: u_int16_t rtalert_val;
1.22 itojun 859: u_int32_t jumboplen;
1.55 itojun 860: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 861:
862: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 863: switch (*opt) {
864: case IP6OPT_PAD1:
865: optlen = 1;
866: break;
867: case IP6OPT_PADN:
868: if (hbhlen < IP6OPT_MINLEN) {
869: ip6stat.ip6s_toosmall++;
870: goto bad;
871: }
872: optlen = *(opt + 1) + 2;
873: break;
874: case IP6OPT_RTALERT:
875: /* XXX may need check for alignment */
876: if (hbhlen < IP6OPT_RTALERT_LEN) {
877: ip6stat.ip6s_toosmall++;
878: goto bad;
879: }
880: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 881: /* XXX stat */
882: icmp6_error(m, ICMP6_PARAM_PROB,
883: ICMP6_PARAMPROB_HEADER,
884: erroff + opt + 1 - opthead);
885: return (-1);
1.35 itojun 886: }
887: optlen = IP6OPT_RTALERT_LEN;
888: bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
889: *rtalertp = ntohs(rtalert_val);
890: break;
891: case IP6OPT_JUMBO:
1.22 itojun 892: /* XXX may need check for alignment */
893: if (hbhlen < IP6OPT_JUMBO_LEN) {
894: ip6stat.ip6s_toosmall++;
895: goto bad;
896: }
1.35 itojun 897: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 898: /* XXX stat */
899: icmp6_error(m, ICMP6_PARAM_PROB,
900: ICMP6_PARAMPROB_HEADER,
901: erroff + opt + 1 - opthead);
902: return (-1);
1.35 itojun 903: }
1.22 itojun 904: optlen = IP6OPT_JUMBO_LEN;
905:
906: /*
907: * IPv6 packets that have non 0 payload length
1.35 itojun 908: * must not contain a jumbo payload option.
1.22 itojun 909: */
910: ip6 = mtod(m, struct ip6_hdr *);
911: if (ip6->ip6_plen) {
912: ip6stat.ip6s_badoptions++;
913: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 914: ICMP6_PARAMPROB_HEADER,
915: erroff + opt - opthead);
916: return (-1);
1.22 itojun 917: }
1.2 itojun 918:
1.22 itojun 919: /*
920: * We may see jumbolen in unaligned location, so
921: * we'd need to perform bcopy().
922: */
923: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
924: jumboplen = (u_int32_t)htonl(jumboplen);
925:
926: #if 1
927: /*
928: * if there are multiple jumbo payload options,
929: * *plenp will be non-zero and the packet will be
930: * rejected.
931: * the behavior may need some debate in ipngwg -
932: * multiple options does not make sense, however,
933: * there's no explicit mention in specification.
934: */
935: if (*plenp != 0) {
936: ip6stat.ip6s_badoptions++;
937: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 938: ICMP6_PARAMPROB_HEADER,
939: erroff + opt + 2 - opthead);
940: return (-1);
1.22 itojun 941: }
1.8 itojun 942: #endif
1.2 itojun 943:
1.22 itojun 944: /*
945: * jumbo payload length must be larger than 65535.
946: */
947: if (jumboplen <= IPV6_MAXPACKET) {
948: ip6stat.ip6s_badoptions++;
949: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 950: ICMP6_PARAMPROB_HEADER,
951: erroff + opt + 2 - opthead);
952: return (-1);
1.22 itojun 953: }
954: *plenp = jumboplen;
955:
956: break;
1.35 itojun 957: default: /* unknown option */
958: if (hbhlen < IP6OPT_MINLEN) {
959: ip6stat.ip6s_toosmall++;
960: goto bad;
961: }
1.55 itojun 962: optlen = ip6_unknown_opt(opt, m,
963: erroff + opt - opthead);
964: if (optlen == -1)
965: return (-1);
1.35 itojun 966: optlen += 2;
967: break;
1.2 itojun 968: }
969: }
970:
1.55 itojun 971: return (0);
1.2 itojun 972:
973: bad:
974: m_freem(m);
1.55 itojun 975: return (-1);
1.2 itojun 976: }
977:
978: /*
979: * Unknown option processing.
980: * The third argument `off' is the offset from the IPv6 header to the option,
981: * which is necessary if the IPv6 header the and option header and IPv6 header
982: * is not continuous in order to return an ICMPv6 error.
983: */
984: int
985: ip6_unknown_opt(optp, m, off)
986: u_int8_t *optp;
987: struct mbuf *m;
988: int off;
989: {
990: struct ip6_hdr *ip6;
991:
1.35 itojun 992: switch (IP6OPT_TYPE(*optp)) {
993: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 994: return ((int)*(optp + 1));
1.35 itojun 995: case IP6OPT_TYPE_DISCARD: /* silently discard */
996: m_freem(m);
1.58 itojun 997: return (-1);
1.35 itojun 998: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
999: ip6stat.ip6s_badoptions++;
1000: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1001: return (-1);
1.35 itojun 1002: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1003: ip6stat.ip6s_badoptions++;
1004: ip6 = mtod(m, struct ip6_hdr *);
1005: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1006: (m->m_flags & (M_BCAST|M_MCAST)))
1007: m_freem(m);
1008: else
1009: icmp6_error(m, ICMP6_PARAM_PROB,
1010: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1011: return (-1);
1.2 itojun 1012: }
1013:
1014: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1015: return (-1);
1.2 itojun 1016: }
1017:
1018: /*
1.9 itojun 1019: * Create the "control" list for this pcb.
1020: *
1021: * The routine will be called from upper layer handlers like tcp6_input().
1022: * Thus the routine assumes that the caller (tcp6_input) have already
1023: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1024: * very first mbuf on the mbuf chain.
1025: * We may want to add some infinite loop prevention or sanity checks for safety.
1026: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1027: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1028: */
1029: void
1030: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 1031: struct in6pcb *in6p;
1032: struct mbuf **mp;
1033: struct ip6_hdr *ip6;
1034: struct mbuf *m;
1.2 itojun 1035: {
1.85 rpaulo 1036: #ifdef RFC2292
1037: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1038: #else
1039: #define IS2292(x, y) (y)
1040: #endif
1041:
1.9 itojun 1042: #ifdef SO_TIMESTAMP
1.2 itojun 1043: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1044: struct timeval tv;
1045:
1046: microtime(&tv);
1047: *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
1.63 itojun 1048: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1049: if (*mp)
1050: mp = &(*mp)->m_next;
1051: }
1.9 itojun 1052: #endif
1.87 rpaulo 1053:
1054: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1055: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1056: return;
1057:
1.2 itojun 1058: /* RFC 2292 sec. 5 */
1.35 itojun 1059: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1060: struct in6_pktinfo pi6;
1.85 rpaulo 1061:
1.2 itojun 1062: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81 rpaulo 1063: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1064: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1065: m->m_pkthdr.rcvif->if_index : 0;
1.2 itojun 1066: *mp = sbcreatecontrol((caddr_t) &pi6,
1.85 rpaulo 1067: sizeof(struct in6_pktinfo),
1068: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1069: if (*mp)
1070: mp = &(*mp)->m_next;
1071: }
1.85 rpaulo 1072:
1.2 itojun 1073: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1074: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1075:
1.63 itojun 1076: *mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),
1.85 rpaulo 1077: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1078: if (*mp)
1079: mp = &(*mp)->m_next;
1080: }
1081:
1082: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1083: u_int32_t flowinfo;
1084: int tclass;
1085:
1086: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1087: flowinfo >>= 20;
1088:
1089: tclass = flowinfo & 0xff;
1090: *mp = sbcreatecontrol((caddr_t)&tclass, sizeof(tclass),
1091: IPV6_TCLASS, IPPROTO_IPV6);
1092:
1.2 itojun 1093: if (*mp)
1094: mp = &(*mp)->m_next;
1095: }
1096:
1097: /*
1.75 itojun 1098: * IPV6_HOPOPTS socket option. Recall that we required super-user
1099: * privilege for the option (see ip6_ctloutput), but it might be too
1100: * strict, since there might be some hop-by-hop options which can be
1101: * returned to normal user.
1.85 rpaulo 1102: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1103: */
1.75 itojun 1104: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1105: /*
1106: * Check if a hop-by-hop options header is contatined in the
1107: * received packet, and if so, store the options as ancillary
1108: * data. Note that a hop-by-hop options header must be
1109: * just after the IPv6 header, which fact is assured through
1110: * the IPv6 input processing.
1111: */
1.78 christos 1112: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1113: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1114: struct ip6_hbh *hbh;
1115: int hbhlen;
1.62 itojun 1116: struct mbuf *ext;
1.9 itojun 1117:
1.62 itojun 1118: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1119: xip6->ip6_nxt);
1.62 itojun 1120: if (ext == NULL) {
1.9 itojun 1121: ip6stat.ip6s_tooshort++;
1122: return;
1123: }
1.62 itojun 1124: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1125: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1126: if (hbhlen != ext->m_len) {
1127: m_freem(ext);
1.9 itojun 1128: ip6stat.ip6s_tooshort++;
1129: return;
1130: }
1.2 itojun 1131:
1132: /*
1133: * XXX: We copy whole the header even if a jumbo
1134: * payload option is included, which option is to
1135: * be removed before returning in the RFC 2292.
1.85 rpaulo 1136: * Note: this constraint is removed in RFC3542.
1.2 itojun 1137: */
1.9 itojun 1138: *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
1.85 rpaulo 1139: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1140: IPPROTO_IPV6);
1.2 itojun 1141: if (*mp)
1142: mp = &(*mp)->m_next;
1.62 itojun 1143: m_freem(ext);
1.2 itojun 1144: }
1145: }
1146:
1147: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1148: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1149: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1150: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1151:
1152: /*
1153: * Search for destination options headers or routing
1154: * header(s) through the header chain, and stores each
1155: * header as ancillary data.
1156: * Note that the order of the headers remains in
1157: * the chain of ancillary data.
1158: */
1.86 rpaulo 1159: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1160: struct ip6_ext *ip6e = NULL;
1.9 itojun 1161: int elen;
1.62 itojun 1162: struct mbuf *ext = NULL;
1.9 itojun 1163:
1.62 itojun 1164: /*
1165: * if it is not an extension header, don't try to
1166: * pull it from the chain.
1167: */
1168: switch (nxt) {
1169: case IPPROTO_DSTOPTS:
1170: case IPPROTO_ROUTING:
1171: case IPPROTO_HOPOPTS:
1172: case IPPROTO_AH: /* is it possible? */
1173: break;
1174: default:
1175: goto loopend;
1176: }
1177:
1178: ext = ip6_pullexthdr(m, off, nxt);
1179: if (ext == NULL) {
1.9 itojun 1180: ip6stat.ip6s_tooshort++;
1181: return;
1182: }
1.62 itojun 1183: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1184: if (nxt == IPPROTO_AH)
1185: elen = (ip6e->ip6e_len + 2) << 2;
1186: else
1187: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1188: if (elen != ext->m_len) {
1189: m_freem(ext);
1.9 itojun 1190: ip6stat.ip6s_tooshort++;
1191: return;
1192: }
1.57 thorpej 1193: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1194:
1.35 itojun 1195: switch (nxt) {
1.62 itojun 1196: case IPPROTO_DSTOPTS:
1.35 itojun 1197: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1198: break;
1199:
1200: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.85 rpaulo 1201: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1202: IPPROTO_IPV6);
1.35 itojun 1203: if (*mp)
1204: mp = &(*mp)->m_next;
1205: break;
1206:
1207: case IPPROTO_ROUTING:
1208: if (!in6p->in6p_flags & IN6P_RTHDR)
1209: break;
1210:
1211: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.85 rpaulo 1212: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1213: IPPROTO_IPV6);
1.35 itojun 1214: if (*mp)
1215: mp = &(*mp)->m_next;
1216: break;
1217:
1.62 itojun 1218: case IPPROTO_HOPOPTS:
1219: case IPPROTO_AH: /* is it possible? */
1220: break;
1221:
1.35 itojun 1222: default:
1223: /*
1.62 itojun 1224: * other cases have been filtered in the above.
1225: * none will visit this case. here we supply
1226: * the code just in case (nxt overwritten or
1227: * other cases).
1.35 itojun 1228: */
1.62 itojun 1229: m_freem(ext);
1.35 itojun 1230: goto loopend;
1231:
1.2 itojun 1232: }
1233:
1234: /* proceed with the next header. */
1.9 itojun 1235: off += elen;
1.2 itojun 1236: nxt = ip6e->ip6e_nxt;
1.62 itojun 1237: ip6e = NULL;
1238: m_freem(ext);
1239: ext = NULL;
1.2 itojun 1240: }
1241: loopend:
1.62 itojun 1242: ;
1.2 itojun 1243: }
1.62 itojun 1244: }
1.85 rpaulo 1245: #undef IS2292
1246:
1247:
1248: void
1249: ip6_notify_pmtu(struct in6pcb *in6p, struct sockaddr_in6 *dst, uint32_t *mtu)
1250: {
1251: struct socket *so;
1252: struct mbuf *m_mtu;
1253: struct ip6_mtuinfo mtuctl;
1254:
1255: so = in6p->in6p_socket;
1256:
1257: if (mtu == NULL)
1258: return;
1259:
1260: #ifdef DIAGNOSTIC
1261: if (so == NULL) /* I believe this is impossible */
1262: panic("ip6_notify_pmtu: socket is NULL");
1263: #endif
1264:
1265: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1266: mtuctl.ip6m_mtu = *mtu;
1267: mtuctl.ip6m_addr = *dst;
1268: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1269: return;
1270:
1271: if ((m_mtu = sbcreatecontrol((caddr_t)&mtuctl, sizeof(mtuctl),
1272: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1273: return;
1274:
1275: if (sbappendaddr(&so->so_rcv, (struct sockaddr *)dst, NULL, m_mtu)
1276: == 0) {
1277: m_freem(m_mtu);
1278: /* XXX: should count statistics */
1279: } else
1280: sorwakeup(so);
1281:
1282: return;
1283: }
1.62 itojun 1284:
1285: /*
1286: * pull single extension header from mbuf chain. returns single mbuf that
1287: * contains the result, or NULL on error.
1288: */
1289: static struct mbuf *
1290: ip6_pullexthdr(m, off, nxt)
1291: struct mbuf *m;
1292: size_t off;
1293: int nxt;
1294: {
1295: struct ip6_ext ip6e;
1296: size_t elen;
1297: struct mbuf *n;
1298:
1299: #ifdef DIAGNOSTIC
1300: switch (nxt) {
1301: case IPPROTO_DSTOPTS:
1302: case IPPROTO_ROUTING:
1303: case IPPROTO_HOPOPTS:
1304: case IPPROTO_AH: /* is it possible? */
1305: break;
1306: default:
1307: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1308: }
1.62 itojun 1309: #endif
1.2 itojun 1310:
1.62 itojun 1311: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1312: if (nxt == IPPROTO_AH)
1313: elen = (ip6e.ip6e_len + 2) << 2;
1314: else
1315: elen = (ip6e.ip6e_len + 1) << 3;
1316:
1317: MGET(n, M_DONTWAIT, MT_DATA);
1318: if (n && elen >= MLEN) {
1319: MCLGET(n, M_DONTWAIT);
1320: if ((n->m_flags & M_EXT) == 0) {
1321: m_free(n);
1322: n = NULL;
1323: }
1324: }
1325: if (!n)
1326: return NULL;
1327:
1328: n->m_len = 0;
1329: if (elen >= M_TRAILINGSPACE(n)) {
1330: m_free(n);
1331: return NULL;
1332: }
1333:
1334: m_copydata(m, off, elen, mtod(n, caddr_t));
1335: n->m_len = elen;
1336: return n;
1.2 itojun 1337: }
1338:
1339: /*
1340: * Get pointer to the previous header followed by the header
1341: * currently processed.
1342: * XXX: This function supposes that
1343: * M includes all headers,
1344: * the next header field and the header length field of each header
1345: * are valid, and
1346: * the sum of each header length equals to OFF.
1347: * Because of these assumptions, this function must be called very
1348: * carefully. Moreover, it will not be used in the near future when
1349: * we develop `neater' mechanism to process extension headers.
1350: */
1.58 itojun 1351: u_int8_t *
1.2 itojun 1352: ip6_get_prevhdr(m, off)
1353: struct mbuf *m;
1354: int off;
1355: {
1356: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1357:
1358: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1359: return (&ip6->ip6_nxt);
1.2 itojun 1360: else {
1361: int len, nxt;
1362: struct ip6_ext *ip6e = NULL;
1363:
1364: nxt = ip6->ip6_nxt;
1365: len = sizeof(struct ip6_hdr);
1366: while (len < off) {
1367: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
1368:
1.35 itojun 1369: switch (nxt) {
1.2 itojun 1370: case IPPROTO_FRAGMENT:
1371: len += sizeof(struct ip6_frag);
1372: break;
1373: case IPPROTO_AH:
1374: len += (ip6e->ip6e_len + 2) << 2;
1375: break;
1376: default:
1377: len += (ip6e->ip6e_len + 1) << 3;
1378: break;
1379: }
1380: nxt = ip6e->ip6e_nxt;
1381: }
1382: if (ip6e)
1.58 itojun 1383: return (&ip6e->ip6e_nxt);
1.2 itojun 1384: else
1385: return NULL;
1.18 itojun 1386: }
1387: }
1388:
1389: /*
1390: * get next header offset. m will be retained.
1391: */
1392: int
1393: ip6_nexthdr(m, off, proto, nxtp)
1394: struct mbuf *m;
1395: int off;
1396: int proto;
1397: int *nxtp;
1398: {
1399: struct ip6_hdr ip6;
1400: struct ip6_ext ip6e;
1401: struct ip6_frag fh;
1402:
1403: /* just in case */
1404: if (m == NULL)
1405: panic("ip6_nexthdr: m == NULL");
1406: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1407: return -1;
1408:
1409: switch (proto) {
1410: case IPPROTO_IPV6:
1.83 rpaulo 1411: /* do not chase beyond intermediate IPv6 headers */
1412: if (off != 0)
1413: return -1;
1.18 itojun 1414: if (m->m_pkthdr.len < off + sizeof(ip6))
1415: return -1;
1416: m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
1417: if (nxtp)
1418: *nxtp = ip6.ip6_nxt;
1419: off += sizeof(ip6);
1420: return off;
1421:
1422: case IPPROTO_FRAGMENT:
1423: /*
1424: * terminate parsing if it is not the first fragment,
1425: * it does not make sense to parse through it.
1426: */
1427: if (m->m_pkthdr.len < off + sizeof(fh))
1428: return -1;
1429: m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
1.67 itojun 1430: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1431: return -1;
1432: if (nxtp)
1433: *nxtp = fh.ip6f_nxt;
1434: off += sizeof(struct ip6_frag);
1435: return off;
1436:
1437: case IPPROTO_AH:
1438: if (m->m_pkthdr.len < off + sizeof(ip6e))
1439: return -1;
1440: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1441: if (nxtp)
1442: *nxtp = ip6e.ip6e_nxt;
1443: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1444: if (m->m_pkthdr.len < off)
1445: return -1;
1.18 itojun 1446: return off;
1447:
1448: case IPPROTO_HOPOPTS:
1449: case IPPROTO_ROUTING:
1450: case IPPROTO_DSTOPTS:
1451: if (m->m_pkthdr.len < off + sizeof(ip6e))
1452: return -1;
1453: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1454: if (nxtp)
1455: *nxtp = ip6e.ip6e_nxt;
1456: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1457: if (m->m_pkthdr.len < off)
1458: return -1;
1.18 itojun 1459: return off;
1460:
1461: case IPPROTO_NONE:
1462: case IPPROTO_ESP:
1463: case IPPROTO_IPCOMP:
1464: /* give up */
1465: return -1;
1466:
1467: default:
1468: return -1;
1469: }
1470: }
1471:
1472: /*
1473: * get offset for the last header in the chain. m will be kept untainted.
1474: */
1475: int
1476: ip6_lasthdr(m, off, proto, nxtp)
1477: struct mbuf *m;
1478: int off;
1479: int proto;
1480: int *nxtp;
1481: {
1482: int newoff;
1483: int nxt;
1484:
1485: if (!nxtp) {
1486: nxt = -1;
1487: nxtp = &nxt;
1488: }
1.86 rpaulo 1489: for (;;) {
1.18 itojun 1490: newoff = ip6_nexthdr(m, off, proto, nxtp);
1491: if (newoff < 0)
1492: return off;
1493: else if (newoff < off)
1494: return -1; /* invalid */
1495: else if (newoff == off)
1496: return newoff;
1497:
1498: off = newoff;
1499: proto = *nxtp;
1.2 itojun 1500: }
1501: }
1502:
1.81 rpaulo 1503: struct m_tag *
1504: ip6_addaux(m)
1505: struct mbuf *m;
1506: {
1507: struct m_tag *mtag;
1508:
1509: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1510: if (!mtag) {
1511: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1512: M_NOWAIT);
1513: if (mtag) {
1514: m_tag_prepend(m, mtag);
1515: bzero(mtag + 1, sizeof(struct ip6aux));
1516: }
1517: }
1518: return mtag;
1519: }
1520:
1521: struct m_tag *
1522: ip6_findaux(m)
1523: struct mbuf *m;
1524: {
1525: struct m_tag *mtag;
1526:
1527: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1528: return mtag;
1529: }
1530:
1531: void
1532: ip6_delaux(m)
1533: struct mbuf *m;
1534: {
1535: struct m_tag *mtag;
1536:
1537: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1538: if (mtag)
1539: m_tag_delete(m, mtag);
1540: }
1541:
1.2 itojun 1542: /*
1543: * System control for IP6
1544: */
1545:
1546: u_char inet6ctlerrmap[PRC_NCMDS] = {
1547: 0, 0, 0, 0,
1548: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1549: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1550: EMSGSIZE, EHOSTUNREACH, 0, 0,
1551: 0, 0, 0, 0,
1552: ENOPROTOOPT
1553: };
1554:
1.70 atatat 1555: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1556: {
1.85 rpaulo 1557: #ifdef RFC2292
1558: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1559: #else
1560: #define IS2292(x, y) (y)
1561: #endif
1.26 itojun 1562:
1.73 atatat 1563: sysctl_createv(clog, 0, NULL, NULL,
1564: CTLFLAG_PERMANENT,
1.70 atatat 1565: CTLTYPE_NODE, "net", NULL,
1566: NULL, 0, NULL, 0,
1567: CTL_NET, CTL_EOL);
1.73 atatat 1568: sysctl_createv(clog, 0, NULL, NULL,
1569: CTLFLAG_PERMANENT,
1.74 atatat 1570: CTLTYPE_NODE, "inet6",
1571: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1572: NULL, 0, NULL, 0,
1573: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1574: sysctl_createv(clog, 0, NULL, NULL,
1575: CTLFLAG_PERMANENT,
1.74 atatat 1576: CTLTYPE_NODE, "ip6",
1577: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1578: NULL, 0, NULL, 0,
1579: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1580:
1.73 atatat 1581: sysctl_createv(clog, 0, NULL, NULL,
1582: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1583: CTLTYPE_INT, "forwarding",
1584: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1585: NULL, 0, &ip6_forwarding, 0,
1586: CTL_NET, PF_INET6, IPPROTO_IPV6,
1587: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1588: sysctl_createv(clog, 0, NULL, NULL,
1589: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1590: CTLTYPE_INT, "redirect",
1591: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1592: NULL, 0, &ip6_sendredirects, 0,
1593: CTL_NET, PF_INET6, IPPROTO_IPV6,
1594: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1595: sysctl_createv(clog, 0, NULL, NULL,
1596: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1597: CTLTYPE_INT, "hlim",
1598: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1599: NULL, 0, &ip6_defhlim, 0,
1600: CTL_NET, PF_INET6, IPPROTO_IPV6,
1601: IPV6CTL_DEFHLIM, CTL_EOL);
1602: #ifdef notyet
1.73 atatat 1603: sysctl_createv(clog, 0, NULL, NULL,
1604: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1605: CTLTYPE_INT, "mtu", NULL,
1606: NULL, 0, &, 0,
1607: CTL_NET, PF_INET6, IPPROTO_IPV6,
1608: IPV6CTL_DEFMTU, CTL_EOL);
1609: #endif
1610: #ifdef __no_idea__
1.73 atatat 1611: sysctl_createv(clog, 0, NULL, NULL,
1612: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1613: CTLTYPE_INT, "forwsrcrt", NULL,
1614: NULL, 0, &?, 0,
1615: CTL_NET, PF_INET6, IPPROTO_IPV6,
1616: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1617: sysctl_createv(clog, 0, NULL, NULL,
1618: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1619: CTLTYPE_STRUCT, "mrtstats", NULL,
1620: NULL, 0, &?, sizeof(?),
1621: CTL_NET, PF_INET6, IPPROTO_IPV6,
1622: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1623: sysctl_createv(clog, 0, NULL, NULL,
1624: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1625: CTLTYPE_?, "mrtproto", NULL,
1626: NULL, 0, &?, sizeof(?),
1627: CTL_NET, PF_INET6, IPPROTO_IPV6,
1628: IPV6CTL_MRTPROTO, CTL_EOL);
1629: #endif
1.73 atatat 1630: sysctl_createv(clog, 0, NULL, NULL,
1631: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1632: CTLTYPE_INT, "maxfragpackets",
1633: SYSCTL_DESCR("Maximum number of fragments to buffer "
1634: "for reassembly"),
1.70 atatat 1635: NULL, 0, &ip6_maxfragpackets, 0,
1636: CTL_NET, PF_INET6, IPPROTO_IPV6,
1637: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1638: #ifdef __no_idea__
1.73 atatat 1639: sysctl_createv(clog, 0, NULL, NULL,
1640: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1641: CTLTYPE_INT, "sourcecheck", NULL,
1642: NULL, 0, &?, 0,
1643: CTL_NET, PF_INET6, IPPROTO_IPV6,
1644: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1645: sysctl_createv(clog, 0, NULL, NULL,
1646: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1647: CTLTYPE_INT, "sourcecheck_logint", NULL,
1648: NULL, 0, &?, 0,
1649: CTL_NET, PF_INET6, IPPROTO_IPV6,
1650: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1651: #endif
1.73 atatat 1652: sysctl_createv(clog, 0, NULL, NULL,
1653: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1654: CTLTYPE_INT, "accept_rtadv",
1655: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1656: NULL, 0, &ip6_accept_rtadv, 0,
1657: CTL_NET, PF_INET6, IPPROTO_IPV6,
1658: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1659: sysctl_createv(clog, 0, NULL, NULL,
1660: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1661: CTLTYPE_INT, "keepfaith",
1662: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1663: NULL, 0, &ip6_keepfaith, 0,
1664: CTL_NET, PF_INET6, IPPROTO_IPV6,
1665: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1666: sysctl_createv(clog, 0, NULL, NULL,
1667: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1668: CTLTYPE_INT, "log_interval",
1669: SYSCTL_DESCR("Minumum interval between logging "
1670: "unroutable packets"),
1.70 atatat 1671: NULL, 0, &ip6_log_interval, 0,
1672: CTL_NET, PF_INET6, IPPROTO_IPV6,
1673: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1674: sysctl_createv(clog, 0, NULL, NULL,
1675: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1676: CTLTYPE_INT, "hdrnestlimit",
1677: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1678: NULL, 0, &ip6_hdrnestlimit, 0,
1679: CTL_NET, PF_INET6, IPPROTO_IPV6,
1680: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1681: sysctl_createv(clog, 0, NULL, NULL,
1682: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1683: CTLTYPE_INT, "dad_count",
1684: SYSCTL_DESCR("Number of Duplicate Address Detection "
1685: "probes to send"),
1.70 atatat 1686: NULL, 0, &ip6_dad_count, 0,
1687: CTL_NET, PF_INET6, IPPROTO_IPV6,
1688: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1689: sysctl_createv(clog, 0, NULL, NULL,
1690: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1691: CTLTYPE_INT, "auto_flowlabel",
1692: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1693: NULL, 0, &ip6_auto_flowlabel, 0,
1694: CTL_NET, PF_INET6, IPPROTO_IPV6,
1695: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1696: sysctl_createv(clog, 0, NULL, NULL,
1697: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1698: CTLTYPE_INT, "defmcasthlim",
1699: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1700: NULL, 0, &ip6_defmcasthlim, 0,
1701: CTL_NET, PF_INET6, IPPROTO_IPV6,
1702: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1703: #if NGIF > 0
1.73 atatat 1704: sysctl_createv(clog, 0, NULL, NULL,
1705: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1706: CTLTYPE_INT, "gifhlim",
1707: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1708: NULL, 0, &ip6_gif_hlim, 0,
1709: CTL_NET, PF_INET6, IPPROTO_IPV6,
1710: IPV6CTL_GIF_HLIM, CTL_EOL);
1711: #endif /* NGIF */
1.73 atatat 1712: sysctl_createv(clog, 0, NULL, NULL,
1713: CTLFLAG_PERMANENT,
1.74 atatat 1714: CTLTYPE_STRING, "kame_version",
1715: SYSCTL_DESCR("KAME Version"),
1.78 christos 1716: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1717: CTL_NET, PF_INET6, IPPROTO_IPV6,
1718: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1719: sysctl_createv(clog, 0, NULL, NULL,
1720: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1721: CTLTYPE_INT, "use_deprecated",
1722: SYSCTL_DESCR("Allow use of deprecated addresses as "
1723: "source addresses"),
1.70 atatat 1724: NULL, 0, &ip6_use_deprecated, 0,
1725: CTL_NET, PF_INET6, IPPROTO_IPV6,
1726: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1727: sysctl_createv(clog, 0, NULL, NULL,
1728: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1729: CTLTYPE_INT, "rr_prune", NULL,
1730: NULL, 0, &ip6_rr_prune, 0,
1731: CTL_NET, PF_INET6, IPPROTO_IPV6,
1732: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1733: sysctl_createv(clog, 0, NULL, NULL,
1734: CTLFLAG_PERMANENT
1.70 atatat 1735: #ifndef INET6_BINDV6ONLY
1.73 atatat 1736: |CTLFLAG_READWRITE,
1.70 atatat 1737: #endif
1.74 atatat 1738: CTLTYPE_INT, "v6only",
1739: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1740: "to PF_INET sockets"),
1.70 atatat 1741: NULL, 0, &ip6_v6only, 0,
1742: CTL_NET, PF_INET6, IPPROTO_IPV6,
1743: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1744: sysctl_createv(clog, 0, NULL, NULL,
1745: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1746: CTLTYPE_INT, "anonportmin",
1747: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1748: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1749: CTL_NET, PF_INET6, IPPROTO_IPV6,
1750: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1751: sysctl_createv(clog, 0, NULL, NULL,
1752: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1753: CTLTYPE_INT, "anonportmax",
1754: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1755: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1756: CTL_NET, PF_INET6, IPPROTO_IPV6,
1757: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1758: #ifndef IPNOPRIVPORTS
1.73 atatat 1759: sysctl_createv(clog, 0, NULL, NULL,
1760: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1761: CTLTYPE_INT, "lowportmin",
1762: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1763: "to assign"),
1.70 atatat 1764: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1765: CTL_NET, PF_INET6, IPPROTO_IPV6,
1766: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1767: sysctl_createv(clog, 0, NULL, NULL,
1768: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1769: CTLTYPE_INT, "lowportmax",
1770: SYSCTL_DESCR("Highest privileged ephemeral port number "
1771: "to assign"),
1.70 atatat 1772: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1773: CTL_NET, PF_INET6, IPPROTO_IPV6,
1774: IPV6CTL_LOWPORTMAX, CTL_EOL);
1775: #endif /* IPNOPRIVPORTS */
1.73 atatat 1776: sysctl_createv(clog, 0, NULL, NULL,
1777: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1778: CTLTYPE_INT, "use_tempaddr",
1779: SYSCTL_DESCR("Use temporary address"),
1780: NULL, 0, &ip6_use_tempaddr, 0,
1781: CTL_NET, PF_INET6, IPPROTO_IPV6,
1782: CTL_CREATE, CTL_EOL);
1783: sysctl_createv(clog, 0, NULL, NULL,
1784: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1785: CTLTYPE_INT, "temppltime",
1786: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1787: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1788: CTL_NET, PF_INET6, IPPROTO_IPV6,
1789: CTL_CREATE, CTL_EOL);
1790: sysctl_createv(clog, 0, NULL, NULL,
1791: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1792: CTLTYPE_INT, "tempvltime",
1793: SYSCTL_DESCR("valid lifetime of a temporary address"),
1794: NULL, 0, &ip6_temp_valid_lifetime, 0,
1795: CTL_NET, PF_INET6, IPPROTO_IPV6,
1796: CTL_CREATE, CTL_EOL);
1797: sysctl_createv(clog, 0, NULL, NULL,
1798: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1799: CTLTYPE_INT, "maxfrags",
1800: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1801: NULL, 0, &ip6_maxfrags, 0,
1802: CTL_NET, PF_INET6, IPPROTO_IPV6,
1803: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1804: sysctl_createv(clog, 0, NULL, NULL,
1805: CTLFLAG_PERMANENT,
1806: CTLTYPE_STRUCT, "stats",
1807: SYSCTL_DESCR("IPv6 statistics"),
1808: NULL, 0, &ip6stat, sizeof(ip6stat),
1809: CTL_NET, PF_INET6, IPPROTO_IPV6,
1810: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1811: sysctl_createv(clog, 0, NULL, NULL,
1812: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1813: CTLTYPE_INT, "use_defaultzone",
1814: SYSCTL_DESCR("Whether to use the default scope zones"),
1815: NULL, 0, &ip6_use_defzone, 0,
1816: CTL_NET, PF_INET6, IPPROTO_IPV6,
1817: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1818: sysctl_createv(clog, 0, NULL, NULL,
1819: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1820: CTLTYPE_INT, "mcast_pmtu",
1821: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1822: NULL, 0, &ip6_mcast_pmtu, 0,
1823: CTL_NET, PF_INET6, IPPROTO_IPV6,
1824: CTL_CREATE, CTL_EOL);
1.2 itojun 1825: }
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