Annotation of src/sys/netinet6/ip6_input.c, Revision 1.163
1.163 ! ozaki-r 1: /* $NetBSD: ip6_input.c,v 1.162 2016/07/04 06:48:14 ozaki-r 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>
1.163 ! ozaki-r 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.162 2016/07/04 06:48:14 ozaki-r Exp $");
1.2 itojun 66:
1.152 pooka 67: #ifdef _KERNEL_OPT
1.129 joerg 68: #include "opt_gateway.h"
1.2 itojun 69: #include "opt_inet.h"
1.85 rpaulo 70: #include "opt_inet6.h"
1.4 thorpej 71: #include "opt_ipsec.h"
1.123 christos 72: #include "opt_compat_netbsd.h"
1.152 pooka 73: #endif
1.2 itojun 74:
75: #include <sys/param.h>
76: #include <sys/systm.h>
77: #include <sys/malloc.h>
78: #include <sys/mbuf.h>
79: #include <sys/domain.h>
80: #include <sys/protosw.h>
81: #include <sys/socket.h>
82: #include <sys/socketvar.h>
83: #include <sys/errno.h>
84: #include <sys/time.h>
85: #include <sys/kernel.h>
86: #include <sys/syslog.h>
87: #include <sys/proc.h>
1.46 simonb 88: #include <sys/sysctl.h>
1.133 tls 89: #include <sys/cprng.h>
1.2 itojun 90:
91: #include <net/if.h>
92: #include <net/if_types.h>
93: #include <net/if_dl.h>
94: #include <net/route.h>
1.148 rmind 95: #include <net/pktqueue.h>
1.15 darrenr 96: #include <net/pfil.h>
1.2 itojun 97:
98: #include <netinet/in.h>
1.9 itojun 99: #include <netinet/in_systm.h>
100: #ifdef INET
101: #include <netinet/ip.h>
1.148 rmind 102: #include <netinet/ip_var.h>
1.9 itojun 103: #include <netinet/ip_icmp.h>
1.45 itojun 104: #endif /* INET */
1.14 itojun 105: #include <netinet/ip6.h>
1.140 christos 106: #include <netinet/portalgo.h>
1.2 itojun 107: #include <netinet6/in6_var.h>
1.11 itojun 108: #include <netinet6/ip6_var.h>
1.116 thorpej 109: #include <netinet6/ip6_private.h>
1.2 itojun 110: #include <netinet6/in6_pcb.h>
1.14 itojun 111: #include <netinet/icmp6.h>
1.81 rpaulo 112: #include <netinet6/scope6_var.h>
1.2 itojun 113: #include <netinet6/in6_ifattach.h>
114: #include <netinet6/nd6.h>
115:
1.142 christos 116: #ifdef IPSEC
1.94 degroote 117: #include <netipsec/ipsec.h>
118: #include <netipsec/ipsec6.h>
119: #include <netipsec/key.h>
1.142 christos 120: #endif /* IPSEC */
1.94 degroote 121:
1.123 christos 122: #ifdef COMPAT_50
123: #include <compat/sys/time.h>
124: #include <compat/sys/socket.h>
125: #endif
126:
1.2 itojun 127: #include <netinet6/ip6protosw.h>
128:
129: #include "faith.h"
130:
1.9 itojun 131: #include <net/net_osdep.h>
132:
1.2 itojun 133: extern struct domain inet6domain;
134:
135: u_char ip6_protox[IPPROTO_MAX];
1.148 rmind 136: pktqueue_t *ip6_pktq __read_mostly;
1.2 itojun 137:
138: int ip6_forward_srcrt; /* XXX */
139: int ip6_sourcecheck; /* XXX */
140: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 141:
1.143 rmind 142: pfil_head_t *inet6_pfil_hook;
1.29 thorpej 143:
1.116 thorpej 144: percpu_t *ip6stat_percpu;
1.2 itojun 145:
1.156 ozaki-r 146: static void ip6_init2(void);
1.148 rmind 147: static void ip6intr(void *);
1.112 dyoung 148: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 149:
1.136 drochner 150: static int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
151: u_int32_t *);
1.111 dyoung 152: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.128 pooka 153: static void sysctl_net_inet6_ip6_setup(struct sysctllog **);
1.2 itojun 154:
155: /*
156: * IP6 initialization: fill in IP6 protocol switch table.
157: * All protocols not implemented in kernel go to raw IP6 protocol handler.
158: */
159: void
1.114 matt 160: ip6_init(void)
1.2 itojun 161: {
1.78 christos 162: const struct ip6protosw *pr;
1.35 itojun 163: int i;
1.2 itojun 164:
1.163 ! ozaki-r 165: in6_init();
1.162 ozaki-r 166:
1.128 pooka 167: sysctl_net_inet6_ip6_setup(NULL);
1.78 christos 168: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 169: if (pr == 0)
170: panic("ip6_init");
171: for (i = 0; i < IPPROTO_MAX; i++)
172: ip6_protox[i] = pr - inet6sw;
1.78 christos 173: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
174: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 175: if (pr->pr_domain->dom_family == PF_INET6 &&
176: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
177: ip6_protox[pr->pr_protocol] = pr - inet6sw;
1.148 rmind 178:
1.149 ozaki-r 179: ip6_pktq = pktq_create(IFQ_MAXLEN, ip6intr, NULL);
1.148 rmind 180: KASSERT(ip6_pktq != NULL);
181:
1.81 rpaulo 182: scope6_init();
183: addrsel_policy_init();
1.2 itojun 184: nd6_init();
185: frag6_init();
1.133 tls 186: ip6_desync_factor = cprng_fast32() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 187:
1.156 ozaki-r 188: ip6_init2();
1.98 liamjfoy 189: #ifdef GATEWAY
1.99 liamjfoy 190: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 191: #endif
1.29 thorpej 192: /* Register our Packet Filter hook. */
1.143 rmind 193: inet6_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET6);
194: KASSERT(inet6_pfil_hook != NULL);
1.116 thorpej 195:
196: ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS);
1.2 itojun 197: }
198:
199: static void
1.156 ozaki-r 200: ip6_init2(void)
1.2 itojun 201: {
202:
1.83 rpaulo 203: /* timer for regeneranation of temporary addresses randomize ID */
1.118 ad 204: callout_init(&in6_tmpaddrtimer_ch, CALLOUT_MPSAFE);
1.83 rpaulo 205: callout_reset(&in6_tmpaddrtimer_ch,
206: (ip6_temp_preferred_lifetime - ip6_desync_factor -
207: ip6_temp_regen_advance) * hz,
208: in6_tmpaddrtimer, NULL);
1.2 itojun 209: }
210:
211: /*
212: * IP6 input interrupt handling. Just pass the packet to ip6_input.
213: */
1.148 rmind 214: static void
215: ip6intr(void *arg __unused)
1.2 itojun 216: {
217: struct mbuf *m;
218:
1.118 ad 219: mutex_enter(softnet_lock);
1.148 rmind 220: while ((m = pktq_dequeue(ip6_pktq)) != NULL) {
1.160 ozaki-r 221: struct psref psref;
222: struct ifnet *rcvif = m_get_rcvif_psref(m, &psref);
1.148 rmind 223:
1.160 ozaki-r 224: if (rcvif == NULL) {
225: m_freem(m);
226: continue;
227: }
1.148 rmind 228: /*
229: * Drop the packet if IPv6 is disabled on the interface.
230: */
1.160 ozaki-r 231: if ((ND_IFINFO(rcvif)->flags & ND6_IFF_IFDISABLED)) {
232: m_put_rcvif_psref(rcvif, &psref);
1.83 rpaulo 233: m_freem(m);
1.148 rmind 234: continue;
1.83 rpaulo 235: }
1.160 ozaki-r 236: ip6_input(m, rcvif);
237: m_put_rcvif_psref(rcvif, &psref);
1.2 itojun 238: }
1.118 ad 239: mutex_exit(softnet_lock);
1.2 itojun 240: }
241:
1.103 dyoung 242: extern struct route ip6_forward_rt;
1.2 itojun 243:
244: void
1.160 ozaki-r 245: ip6_input(struct mbuf *m, struct ifnet *rcvif)
1.2 itojun 246: {
1.9 itojun 247: struct ip6_hdr *ip6;
1.105 dyoung 248: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 249: u_int32_t plen;
1.5 itojun 250: u_int32_t rtalert = ~0;
1.104 yamt 251: int nxt, ours = 0, rh_present = 0;
1.9 itojun 252: struct ifnet *deliverifp = NULL;
1.64 itojun 253: int srcrt = 0;
1.105 dyoung 254: const struct rtentry *rt;
255: union {
256: struct sockaddr dst;
257: struct sockaddr_in6 dst6;
258: } u;
1.2 itojun 259:
260: /*
1.81 rpaulo 261: * make sure we don't have onion peering information into m_tag.
262: */
263: ip6_delaux(m);
264:
265: /*
1.44 itojun 266: * mbuf statistics
1.2 itojun 267: */
268: if (m->m_flags & M_EXT) {
269: if (m->m_next)
1.116 thorpej 270: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 271: else
1.116 thorpej 272: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 273: } else {
1.115 thorpej 274: #define M2MMAX 32
1.2 itojun 275: if (m->m_next) {
1.159 ozaki-r 276: if (m->m_flags & M_LOOP)
1.116 thorpej 277: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.159 ozaki-r 278: else if (rcvif->if_index < M2MMAX)
279: IP6_STATINC(IP6_STAT_M2M + rcvif->if_index);
280: else
1.116 thorpej 281: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 282: } else
1.116 thorpej 283: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 284: #undef M2MMAX
1.2 itojun 285: }
286:
1.159 ozaki-r 287: in6_ifstat_inc(rcvif, ifs6_in_receive);
1.116 thorpej 288: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 289:
1.57 thorpej 290: /*
291: * If the IPv6 header is not aligned, slurp it up into a new
292: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 293: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 294: * IPv6 header is in the first mbuf of the chain.
295: */
1.97 christos 296: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 297: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
298: (max_linkhdr + 3) & ~3)) == NULL) {
299: /* XXXJRT new stat, please */
1.116 thorpej 300: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 301: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.57 thorpej 302: return;
303: }
304: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
1.55 itojun 305: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 306: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 307: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.9 itojun 308: return;
309: }
1.2 itojun 310: }
311:
312: ip6 = mtod(m, struct ip6_hdr *);
313:
314: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 315: IP6_STATINC(IP6_STAT_BADVERS);
1.159 ozaki-r 316: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 317: goto bad;
318: }
1.15 darrenr 319:
1.98 liamjfoy 320: /*
321: * Assume that we can create a fast-forward IP flow entry
322: * based on this packet.
323: */
324: m->m_flags |= M_CANFASTFWD;
325:
1.15 darrenr 326: /*
327: * Run through list of hooks for input packets. If there are any
328: * filters which require that additional packets in the flow are
329: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
330: * Note that filters must _never_ set this flag, as another filter
331: * in the list may have previously cleared it.
332: */
1.39 itojun 333: /*
334: * let ipfilter look at packet on the wire,
335: * not the decapsulated packet.
336: */
1.142 christos 337: #if defined(IPSEC)
1.146 christos 338: if (!ipsec_used || !ipsec_indone(m))
1.39 itojun 339: #else
340: if (1)
341: #endif
342: {
1.64 itojun 343: struct in6_addr odst;
344:
345: odst = ip6->ip6_dst;
1.159 ozaki-r 346: if (pfil_run_hooks(inet6_pfil_hook, &m, rcvif, PFIL_IN) != 0)
1.39 itojun 347: return;
348: if (m == NULL)
349: return;
350: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 351: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 352: }
1.15 darrenr 353:
1.116 thorpej 354: IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt);
1.2 itojun 355:
1.30 thorpej 356: #ifdef ALTQ
357: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
358: /* packet is dropped by traffic conditioner */
359: return;
1.9 itojun 360: }
361: #endif
362:
1.2 itojun 363: /*
1.44 itojun 364: * Check against address spoofing/corruption.
1.2 itojun 365: */
366: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
367: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 368: /*
369: * XXX: "badscope" is not very suitable for a multicast source.
370: */
1.116 thorpej 371: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 372: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.2 itojun 373: goto bad;
374: }
1.13 itojun 375: /*
1.44 itojun 376: * The following check is not documented in specs. A malicious
377: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
378: * and bypass security checks (act as if it was from 127.0.0.1 by using
379: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 380: *
1.44 itojun 381: * This check chokes if we are in an SIIT cloud. As none of BSDs
382: * support IPv4-less kernel compilation, we cannot support SIIT
383: * environment at all. So, it makes more sense for us to reject any
384: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 385: * partial support for SIIT environment.
1.13 itojun 386: */
387: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
388: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 389: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 390: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 391: goto bad;
392: }
1.17 itojun 393: #if 0
1.13 itojun 394: /*
1.17 itojun 395: * Reject packets with IPv4 compatible addresses (auto tunnel).
396: *
397: * The code forbids auto tunnel relay case in RFC1933 (the check is
398: * stronger than RFC1933). We may want to re-enable it if mech-xx
399: * is revised to forbid relaying case.
1.13 itojun 400: */
401: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
402: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
1.116 thorpej 403: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 404: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 405: goto bad;
406: }
407: #endif
1.35 itojun 408:
1.2 itojun 409: /*
1.82 yamt 410: * Disambiguate address scope zones (if there is ambiguity).
411: * We first make sure that the original source or destination address
412: * is not in our internal form for scoped addresses. Such addresses
413: * are not necessarily invalid spec-wise, but we cannot accept them due
414: * to the usage conflict.
415: * in6_setscope() then also checks and rejects the cases where src or
416: * dst are the loopback address and the receiving interface
417: * is not loopback.
418: */
1.88 bouyer 419: if (__predict_false(
420: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
421: goto bad;
422: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 423: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 424: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 425: goto bad;
426: }
1.159 ozaki-r 427: if (in6_setscope(&ip6->ip6_src, rcvif, NULL) ||
428: in6_setscope(&ip6->ip6_dst, rcvif, NULL)) {
1.116 thorpej 429: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 430: goto bad;
431: }
432:
433: /*
1.2 itojun 434: * Multicast check
435: */
436: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
437: struct in6_multi *in6m = 0;
1.9 itojun 438:
1.159 ozaki-r 439: in6_ifstat_inc(rcvif, ifs6_in_mcast);
1.2 itojun 440: /*
441: * See if we belong to the destination multicast group on the
442: * arrival interface.
443: */
1.159 ozaki-r 444: IN6_LOOKUP_MULTI(ip6->ip6_dst, rcvif, in6m);
1.2 itojun 445: if (in6m)
446: ours = 1;
447: else if (!ip6_mrouter) {
1.116 thorpej 448: uint64_t *ip6s = IP6_STAT_GETREF();
449: ip6s[IP6_STAT_NOTMEMBER]++;
450: ip6s[IP6_STAT_CANTFORWARD]++;
451: IP6_STAT_PUTREF();
1.159 ozaki-r 452: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.2 itojun 453: goto bad;
454: }
1.159 ozaki-r 455: deliverifp = rcvif;
1.2 itojun 456: goto hbhcheck;
457: }
458:
1.105 dyoung 459: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
460:
1.2 itojun 461: /*
462: * Unicast check
463: */
1.105 dyoung 464: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
465: if (hit)
1.116 thorpej 466: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 467: else
1.116 thorpej 468: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 469:
1.109 dyoung 470: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 471:
472: /*
473: * Accept the packet if the forwarding interface to the destination
474: * according to the routing table is the loopback interface,
475: * unless the associated route has a gateway.
476: * Note that this approach causes to accept a packet if there is a
477: * route to the loopback interface for the destination of the packet.
478: * But we think it's even useful in some situations, e.g. when using
479: * a special daemon which wants to intercept the packet.
480: */
1.105 dyoung 481: if (rt != NULL &&
482: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.2 itojun 483: #if 0
484: /*
485: * The check below is redundant since the comparison of
486: * the destination and the key of the rtentry has
487: * already done through looking up the routing table.
488: */
1.109 dyoung 489: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 490: #endif
1.105 dyoung 491: rt->rt_ifp->if_type == IFT_LOOP) {
492: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 493: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
494: m->m_flags |= M_ANYCAST6;
1.24 itojun 495: /*
496: * packets to a tentative, duplicated, or somehow invalid
497: * address must not be accepted.
498: */
1.2 itojun 499: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 500: /* this address is ready */
1.2 itojun 501: ours = 1;
1.9 itojun 502: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 503: goto hbhcheck;
504: } else {
1.24 itojun 505: /* address is not ready, so discard the packet. */
1.157 ozaki-r 506: nd6log(LOG_INFO, "packet to an unready address %s->%s\n",
1.24 itojun 507: ip6_sprintf(&ip6->ip6_src),
1.157 ozaki-r 508: ip6_sprintf(&ip6->ip6_dst));
1.24 itojun 509:
510: goto bad;
1.2 itojun 511: }
512: }
513:
514: /*
1.55 itojun 515: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 516: */
517: #if defined(NFAITH) && 0 < NFAITH
518: if (ip6_keepfaith) {
1.105 dyoung 519: if (rt != NULL && rt->rt_ifp != NULL &&
520: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 521: /* XXX do we need more sanity checks? */
522: ours = 1;
1.105 dyoung 523: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 524: goto hbhcheck;
525: }
526: }
527: #endif
528:
529: #if 0
530: {
531: /*
532: * Last resort: check in6_ifaddr for incoming interface.
533: * The code is here until I update the "goto ours hack" code above
534: * working right.
535: */
536: struct ifaddr *ifa;
1.159 ozaki-r 537: IFADDR_FOREACH(ifa, rcvif) {
1.9 itojun 538: if (ifa->ifa_addr->sa_family != AF_INET6)
539: continue;
540: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
541: ours = 1;
542: deliverifp = ifa->ifa_ifp;
1.2 itojun 543: goto hbhcheck;
544: }
545: }
1.9 itojun 546: }
1.2 itojun 547: #endif
548:
549: /*
550: * Now there is no reason to process the packet if it's not our own
551: * and we're not a router.
552: */
553: if (!ip6_forwarding) {
1.116 thorpej 554: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.159 ozaki-r 555: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.2 itojun 556: goto bad;
557: }
558:
559: hbhcheck:
560: /*
1.81 rpaulo 561: * record address information into m_tag, if we don't have one yet.
562: * note that we are unable to record it, if the address is not listed
563: * as our interface address (e.g. multicast addresses, addresses
564: * within FAITH prefixes and such).
565: */
1.111 dyoung 566: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 567: struct in6_ifaddr *ia6;
568:
569: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.111 dyoung 570: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
571: /*
572: * XXX maybe we should drop the packet here,
573: * as we could not provide enough information
574: * to the upper layers.
575: */
1.81 rpaulo 576: }
577: }
578:
579: /*
1.2 itojun 580: * Process Hop-by-Hop options header if it's contained.
581: * m may be modified in ip6_hopopts_input().
582: * If a JumboPayload option is included, plen will also be modified.
583: */
584: plen = (u_int32_t)ntohs(ip6->ip6_plen);
585: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 586: struct ip6_hbh *hbh;
587:
588: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
589: #if 0 /*touches NULL pointer*/
1.159 ozaki-r 590: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.9 itojun 591: #endif
1.2 itojun 592: return; /* m have already been freed */
1.9 itojun 593: }
1.22 itojun 594:
1.2 itojun 595: /* adjust pointer */
596: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 597:
598: /*
1.49 itojun 599: * if the payload length field is 0 and the next header field
1.22 itojun 600: * indicates Hop-by-Hop Options header, then a Jumbo Payload
601: * option MUST be included.
602: */
603: if (ip6->ip6_plen == 0 && plen == 0) {
604: /*
605: * Note that if a valid jumbo payload option is
1.83 rpaulo 606: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 607: * (non-zero) payload length to the variable plen.
1.22 itojun 608: */
1.116 thorpej 609: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.159 ozaki-r 610: in6_ifstat_inc(rcvif, ifs6_in_discard);
611: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.22 itojun 612: icmp6_error(m, ICMP6_PARAM_PROB,
613: ICMP6_PARAMPROB_HEADER,
1.97 christos 614: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 615: return;
616: }
1.9 itojun 617: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
618: sizeof(struct ip6_hbh));
619: if (hbh == NULL) {
1.116 thorpej 620: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 621: return;
622: }
1.57 thorpej 623: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 624: nxt = hbh->ip6h_nxt;
1.2 itojun 625:
626: /*
627: * accept the packet if a router alert option is included
628: * and we act as an IPv6 router.
629: */
1.5 itojun 630: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 631: ours = 1;
632: } else
633: nxt = ip6->ip6_nxt;
634:
635: /*
636: * Check that the amount of data in the buffers
637: * is as at least much as the IPv6 header would have us expect.
638: * Trim mbufs if longer than we expect.
639: * Drop packet if shorter than we expect.
640: */
641: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 642: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 643: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.2 itojun 644: goto bad;
645: }
646: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
647: if (m->m_len == m->m_pkthdr.len) {
648: m->m_len = sizeof(struct ip6_hdr) + plen;
649: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
650: } else
651: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
652: }
653:
654: /*
655: * Forward if desirable.
656: */
657: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
658: /*
659: * If we are acting as a multicast router, all
660: * incoming multicast packets are passed to the
661: * kernel-level multicast forwarding function.
662: * The packet is returned (relatively) intact; if
663: * ip6_mforward() returns a non-zero value, the packet
664: * must be discarded, else it may be accepted below.
665: */
1.159 ozaki-r 666: if (ip6_mrouter && ip6_mforward(ip6, rcvif, m)) {
1.116 thorpej 667: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.2 itojun 668: m_freem(m);
669: return;
670: }
671: if (!ours) {
672: m_freem(m);
673: return;
674: }
1.22 itojun 675: } else if (!ours) {
1.64 itojun 676: ip6_forward(m, srcrt);
1.2 itojun 677: return;
1.56 itojun 678: }
1.25 itojun 679:
680: ip6 = mtod(m, struct ip6_hdr *);
681:
682: /*
683: * Malicious party may be able to use IPv4 mapped addr to confuse
684: * tcp/udp stack and bypass security checks (act as if it was from
685: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
686: *
687: * For SIIT end node behavior, you may want to disable the check.
688: * However, you will become vulnerable to attacks using IPv4 mapped
689: * source.
690: */
691: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
692: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 693: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 694: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.25 itojun 695: goto bad;
696: }
1.2 itojun 697:
698: /*
699: * Tell launch routine the next header
700: */
1.12 itojun 701: #ifdef IFA_STATS
1.28 itojun 702: if (deliverifp != NULL) {
1.9 itojun 703: struct in6_ifaddr *ia6;
704: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
705: if (ia6)
706: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
707: }
708: #endif
1.116 thorpej 709: IP6_STATINC(IP6_STAT_DELIVERED);
1.9 itojun 710: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 711: nest = 0;
1.40 itojun 712:
1.104 yamt 713: rh_present = 0;
1.2 itojun 714: while (nxt != IPPROTO_DONE) {
715: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.116 thorpej 716: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.159 ozaki-r 717: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 718: goto bad;
719: }
1.8 itojun 720:
721: /*
722: * protection against faulty packet - there should be
723: * more sanity checks in header chain processing.
724: */
725: if (m->m_pkthdr.len < off) {
1.116 thorpej 726: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 727: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.8 itojun 728: goto bad;
729: }
730:
1.104 yamt 731: if (nxt == IPPROTO_ROUTING) {
732: if (rh_present++) {
1.159 ozaki-r 733: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.116 thorpej 734: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 735: goto bad;
736: }
737: }
738:
1.142 christos 739: #ifdef IPSEC
1.146 christos 740: if (ipsec_used) {
1.94 degroote 741: /*
1.146 christos 742: * enforce IPsec policy checking if we are seeing last
743: * header. note that we do not visit this with
744: * protocols with pcb layer code - like udp/tcp/raw ip.
1.94 degroote 745: */
1.146 christos 746: if ((inet6sw[ip_protox[nxt]].pr_flags
747: & PR_LASTHDR) != 0) {
1.151 ozaki-r 748: int error = ipsec6_input(m);
1.146 christos 749: if (error)
750: goto bad;
751: }
1.94 degroote 752: }
1.142 christos 753: #endif /* IPSEC */
1.94 degroote 754:
1.2 itojun 755: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
756: }
757: return;
758: bad:
759: m_freem(m);
760: }
761:
762: /*
1.81 rpaulo 763: * set/grab in6_ifaddr correspond to IPv6 destination address.
764: */
765: static struct m_tag *
1.112 dyoung 766: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 767: {
768: struct m_tag *mtag;
1.144 christos 769: struct ip6aux *ip6a;
1.81 rpaulo 770:
771: mtag = ip6_addaux(m);
1.144 christos 772: if (mtag == NULL)
773: return NULL;
1.112 dyoung 774:
1.144 christos 775: ip6a = (struct ip6aux *)(mtag + 1);
776: if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) {
777: IP6_STATINC(IP6_STAT_BADSCOPE);
778: return NULL;
1.112 dyoung 779: }
1.144 christos 780:
781: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
782: ip6a->ip6a_flags = ia->ia6_flags;
783: return mtag;
1.81 rpaulo 784: }
785:
1.112 dyoung 786: const struct ip6aux *
1.107 christos 787: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 788: {
789: struct m_tag *mtag;
790:
791: mtag = ip6_findaux(m);
1.112 dyoung 792: if (mtag != NULL)
793: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 794: else
795: return NULL;
796: }
797:
798: /*
1.2 itojun 799: * Hop-by-Hop options header processing. If a valid jumbo payload option is
800: * included, the real payload length will be stored in plenp.
1.107 christos 801: *
802: * rtalertp - XXX: should be stored more smart way
1.2 itojun 803: */
1.136 drochner 804: int
1.107 christos 805: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
806: struct mbuf **mp, int *offp)
1.2 itojun 807: {
1.35 itojun 808: struct mbuf *m = *mp;
1.2 itojun 809: int off = *offp, hbhlen;
810: struct ip6_hbh *hbh;
811:
812: /* validation of the length of the header */
1.9 itojun 813: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
814: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
815: if (hbh == NULL) {
1.116 thorpej 816: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 817: return -1;
818: }
819: hbhlen = (hbh->ip6h_len + 1) << 3;
820: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
821: hbhlen);
822: if (hbh == NULL) {
1.116 thorpej 823: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 824: return -1;
825: }
1.57 thorpej 826: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 827: off += hbhlen;
828: hbhlen -= sizeof(struct ip6_hbh);
829:
830: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
831: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 832: return (-1);
1.2 itojun 833:
834: *offp = off;
835: *mp = m;
1.58 itojun 836: return (0);
1.2 itojun 837: }
838:
839: /*
840: * Search header for all Hop-by-hop options and process each option.
841: * This function is separate from ip6_hopopts_input() in order to
842: * handle a case where the sending node itself process its hop-by-hop
843: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 844: *
845: * The function assumes that hbh header is located right after the IPv6 header
846: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
847: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 848: */
1.136 drochner 849: static int
1.107 christos 850: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
851: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 852: {
853: struct ip6_hdr *ip6;
854: int optlen = 0;
855: u_int8_t *opt = opthead;
856: u_int16_t rtalert_val;
1.22 itojun 857: u_int32_t jumboplen;
1.55 itojun 858: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 859:
860: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 861: switch (*opt) {
862: case IP6OPT_PAD1:
863: optlen = 1;
864: break;
865: case IP6OPT_PADN:
866: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 867: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 868: goto bad;
869: }
870: optlen = *(opt + 1) + 2;
871: break;
872: case IP6OPT_RTALERT:
873: /* XXX may need check for alignment */
874: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 875: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 876: goto bad;
877: }
878: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 879: /* XXX stat */
880: icmp6_error(m, ICMP6_PARAM_PROB,
881: ICMP6_PARAMPROB_HEADER,
882: erroff + opt + 1 - opthead);
883: return (-1);
1.35 itojun 884: }
885: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 886: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 887: *rtalertp = ntohs(rtalert_val);
888: break;
889: case IP6OPT_JUMBO:
1.22 itojun 890: /* XXX may need check for alignment */
891: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 892: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 893: goto bad;
894: }
1.35 itojun 895: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 896: /* XXX stat */
897: icmp6_error(m, ICMP6_PARAM_PROB,
898: ICMP6_PARAMPROB_HEADER,
899: erroff + opt + 1 - opthead);
900: return (-1);
1.35 itojun 901: }
1.22 itojun 902: optlen = IP6OPT_JUMBO_LEN;
903:
904: /*
905: * IPv6 packets that have non 0 payload length
1.35 itojun 906: * must not contain a jumbo payload option.
1.22 itojun 907: */
908: ip6 = mtod(m, struct ip6_hdr *);
909: if (ip6->ip6_plen) {
1.116 thorpej 910: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 911: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 912: ICMP6_PARAMPROB_HEADER,
913: erroff + opt - opthead);
914: return (-1);
1.22 itojun 915: }
1.2 itojun 916:
1.22 itojun 917: /*
918: * We may see jumbolen in unaligned location, so
919: * we'd need to perform bcopy().
920: */
1.126 tsutsui 921: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 922: jumboplen = (u_int32_t)htonl(jumboplen);
923:
924: #if 1
925: /*
926: * if there are multiple jumbo payload options,
927: * *plenp will be non-zero and the packet will be
928: * rejected.
929: * the behavior may need some debate in ipngwg -
930: * multiple options does not make sense, however,
931: * there's no explicit mention in specification.
932: */
933: if (*plenp != 0) {
1.116 thorpej 934: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 935: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 936: ICMP6_PARAMPROB_HEADER,
937: erroff + opt + 2 - opthead);
938: return (-1);
1.22 itojun 939: }
1.8 itojun 940: #endif
1.2 itojun 941:
1.22 itojun 942: /*
943: * jumbo payload length must be larger than 65535.
944: */
945: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 946: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 947: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 948: ICMP6_PARAMPROB_HEADER,
949: erroff + opt + 2 - opthead);
950: return (-1);
1.22 itojun 951: }
952: *plenp = jumboplen;
953:
954: break;
1.35 itojun 955: default: /* unknown option */
956: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 957: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 958: goto bad;
959: }
1.55 itojun 960: optlen = ip6_unknown_opt(opt, m,
961: erroff + opt - opthead);
962: if (optlen == -1)
963: return (-1);
1.35 itojun 964: optlen += 2;
965: break;
1.2 itojun 966: }
967: }
968:
1.55 itojun 969: return (0);
1.2 itojun 970:
971: bad:
972: m_freem(m);
1.55 itojun 973: return (-1);
1.2 itojun 974: }
975:
976: /*
977: * Unknown option processing.
978: * The third argument `off' is the offset from the IPv6 header to the option,
979: * which is necessary if the IPv6 header the and option header and IPv6 header
980: * is not continuous in order to return an ICMPv6 error.
981: */
982: int
1.107 christos 983: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 984: {
985: struct ip6_hdr *ip6;
986:
1.35 itojun 987: switch (IP6OPT_TYPE(*optp)) {
988: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 989: return ((int)*(optp + 1));
1.35 itojun 990: case IP6OPT_TYPE_DISCARD: /* silently discard */
991: m_freem(m);
1.58 itojun 992: return (-1);
1.35 itojun 993: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 994: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 995: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 996: return (-1);
1.35 itojun 997: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 998: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 999: ip6 = mtod(m, struct ip6_hdr *);
1000: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1001: (m->m_flags & (M_BCAST|M_MCAST)))
1002: m_freem(m);
1003: else
1004: icmp6_error(m, ICMP6_PARAM_PROB,
1005: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1006: return (-1);
1.2 itojun 1007: }
1008:
1009: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1010: return (-1);
1.2 itojun 1011: }
1012:
1013: /*
1.9 itojun 1014: * Create the "control" list for this pcb.
1015: *
1016: * The routine will be called from upper layer handlers like tcp6_input().
1017: * Thus the routine assumes that the caller (tcp6_input) have already
1018: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1019: * very first mbuf on the mbuf chain.
1020: * We may want to add some infinite loop prevention or sanity checks for safety.
1021: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1022: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1023: */
1024: void
1.107 christos 1025: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1026: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1027: {
1.85 rpaulo 1028: #ifdef RFC2292
1029: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1030: #else
1031: #define IS2292(x, y) (y)
1032: #endif
1033:
1.123 christos 1034: if (in6p->in6p_socket->so_options & SO_TIMESTAMP
1035: #ifdef SO_OTIMESTAMP
1036: || in6p->in6p_socket->so_options & SO_OTIMESTAMP
1037: #endif
1038: ) {
1.2 itojun 1039: struct timeval tv;
1040:
1041: microtime(&tv);
1.123 christos 1042: #ifdef SO_OTIMESTAMP
1043: if (in6p->in6p_socket->so_options & SO_OTIMESTAMP) {
1044: struct timeval50 tv50;
1045: timeval_to_timeval50(&tv, &tv50);
1046: *mp = sbcreatecontrol((void *) &tv50, sizeof(tv50),
1047: SCM_OTIMESTAMP, SOL_SOCKET);
1048: } else
1049: #endif
1.97 christos 1050: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1051: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1052: if (*mp)
1053: mp = &(*mp)->m_next;
1054: }
1.87 rpaulo 1055:
1056: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1057: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1058: return;
1059:
1.2 itojun 1060: /* RFC 2292 sec. 5 */
1.35 itojun 1061: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1062: struct in6_pktinfo pi6;
1.85 rpaulo 1063:
1.126 tsutsui 1064: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1065: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.160 ozaki-r 1066: pi6.ipi6_ifindex = m->m_pkthdr.rcvif_index;
1.97 christos 1067: *mp = sbcreatecontrol((void *) &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:
1.97 christos 1077: *mp = sbcreatecontrol((void *) &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;
1.97 christos 1091: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 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) {
1.116 thorpej 1122: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 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);
1.116 thorpej 1129: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 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: */
1.97 christos 1139: *mp = sbcreatecontrol((void *)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) {
1.116 thorpej 1181: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 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);
1.116 thorpej 1191: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 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:
1.127 martin 1198: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1199: break;
1200:
1.97 christos 1201: *mp = sbcreatecontrol((void *)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:
1.127 martin 1209: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1210: break;
1211:
1.97 christos 1212: *mp = sbcreatecontrol((void *)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
1.95 dyoung 1250: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1251: uint32_t *mtu)
1.85 rpaulo 1252: {
1253: struct socket *so;
1254: struct mbuf *m_mtu;
1255: struct ip6_mtuinfo mtuctl;
1256:
1257: so = in6p->in6p_socket;
1258:
1259: if (mtu == NULL)
1260: return;
1261:
1262: #ifdef DIAGNOSTIC
1263: if (so == NULL) /* I believe this is impossible */
1264: panic("ip6_notify_pmtu: socket is NULL");
1265: #endif
1266:
1267: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1268: mtuctl.ip6m_mtu = *mtu;
1269: mtuctl.ip6m_addr = *dst;
1270: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1271: return;
1272:
1.97 christos 1273: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1274: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1275: return;
1276:
1.95 dyoung 1277: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1278: == 0) {
1279: m_freem(m_mtu);
1280: /* XXX: should count statistics */
1281: } else
1282: sorwakeup(so);
1283:
1284: return;
1285: }
1.62 itojun 1286:
1287: /*
1288: * pull single extension header from mbuf chain. returns single mbuf that
1289: * contains the result, or NULL on error.
1290: */
1291: static struct mbuf *
1.107 christos 1292: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1293: {
1294: struct ip6_ext ip6e;
1295: size_t elen;
1296: struct mbuf *n;
1297:
1298: #ifdef DIAGNOSTIC
1299: switch (nxt) {
1300: case IPPROTO_DSTOPTS:
1301: case IPPROTO_ROUTING:
1302: case IPPROTO_HOPOPTS:
1303: case IPPROTO_AH: /* is it possible? */
1304: break;
1305: default:
1306: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1307: }
1.62 itojun 1308: #endif
1.2 itojun 1309:
1.97 christos 1310: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1311: if (nxt == IPPROTO_AH)
1312: elen = (ip6e.ip6e_len + 2) << 2;
1313: else
1314: elen = (ip6e.ip6e_len + 1) << 3;
1315:
1316: MGET(n, M_DONTWAIT, MT_DATA);
1317: if (n && elen >= MLEN) {
1318: MCLGET(n, M_DONTWAIT);
1319: if ((n->m_flags & M_EXT) == 0) {
1320: m_free(n);
1321: n = NULL;
1322: }
1323: }
1324: if (!n)
1325: return NULL;
1326:
1327: n->m_len = 0;
1328: if (elen >= M_TRAILINGSPACE(n)) {
1329: m_free(n);
1330: return NULL;
1331: }
1332:
1.97 christos 1333: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1334: n->m_len = elen;
1335: return n;
1.2 itojun 1336: }
1337:
1338: /*
1339: * Get pointer to the previous header followed by the header
1340: * currently processed.
1341: * XXX: This function supposes that
1342: * M includes all headers,
1343: * the next header field and the header length field of each header
1344: * are valid, and
1345: * the sum of each header length equals to OFF.
1346: * Because of these assumptions, this function must be called very
1347: * carefully. Moreover, it will not be used in the near future when
1348: * we develop `neater' mechanism to process extension headers.
1349: */
1.58 itojun 1350: u_int8_t *
1.107 christos 1351: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1352: {
1353: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1354:
1355: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1356: return (&ip6->ip6_nxt);
1.2 itojun 1357: else {
1358: int len, nxt;
1359: struct ip6_ext *ip6e = NULL;
1360:
1361: nxt = ip6->ip6_nxt;
1362: len = sizeof(struct ip6_hdr);
1363: while (len < off) {
1.97 christos 1364: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1365:
1.35 itojun 1366: switch (nxt) {
1.2 itojun 1367: case IPPROTO_FRAGMENT:
1368: len += sizeof(struct ip6_frag);
1369: break;
1370: case IPPROTO_AH:
1371: len += (ip6e->ip6e_len + 2) << 2;
1372: break;
1373: default:
1374: len += (ip6e->ip6e_len + 1) << 3;
1375: break;
1376: }
1377: nxt = ip6e->ip6e_nxt;
1378: }
1379: if (ip6e)
1.58 itojun 1380: return (&ip6e->ip6e_nxt);
1.2 itojun 1381: else
1382: return NULL;
1.18 itojun 1383: }
1384: }
1385:
1386: /*
1387: * get next header offset. m will be retained.
1388: */
1389: int
1.107 christos 1390: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1391: {
1392: struct ip6_hdr ip6;
1393: struct ip6_ext ip6e;
1394: struct ip6_frag fh;
1395:
1396: /* just in case */
1397: if (m == NULL)
1398: panic("ip6_nexthdr: m == NULL");
1399: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1400: return -1;
1401:
1402: switch (proto) {
1403: case IPPROTO_IPV6:
1.83 rpaulo 1404: /* do not chase beyond intermediate IPv6 headers */
1405: if (off != 0)
1406: return -1;
1.18 itojun 1407: if (m->m_pkthdr.len < off + sizeof(ip6))
1408: return -1;
1.97 christos 1409: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1410: if (nxtp)
1411: *nxtp = ip6.ip6_nxt;
1412: off += sizeof(ip6);
1413: return off;
1414:
1415: case IPPROTO_FRAGMENT:
1416: /*
1417: * terminate parsing if it is not the first fragment,
1418: * it does not make sense to parse through it.
1419: */
1420: if (m->m_pkthdr.len < off + sizeof(fh))
1421: return -1;
1.97 christos 1422: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1423: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1424: return -1;
1425: if (nxtp)
1426: *nxtp = fh.ip6f_nxt;
1427: off += sizeof(struct ip6_frag);
1428: return off;
1429:
1430: case IPPROTO_AH:
1431: if (m->m_pkthdr.len < off + sizeof(ip6e))
1432: return -1;
1.97 christos 1433: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1434: if (nxtp)
1435: *nxtp = ip6e.ip6e_nxt;
1436: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1437: if (m->m_pkthdr.len < off)
1438: return -1;
1.18 itojun 1439: return off;
1440:
1441: case IPPROTO_HOPOPTS:
1442: case IPPROTO_ROUTING:
1443: case IPPROTO_DSTOPTS:
1444: if (m->m_pkthdr.len < off + sizeof(ip6e))
1445: return -1;
1.97 christos 1446: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1447: if (nxtp)
1448: *nxtp = ip6e.ip6e_nxt;
1449: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1450: if (m->m_pkthdr.len < off)
1451: return -1;
1.18 itojun 1452: return off;
1453:
1454: case IPPROTO_NONE:
1455: case IPPROTO_ESP:
1456: case IPPROTO_IPCOMP:
1457: /* give up */
1458: return -1;
1459:
1460: default:
1461: return -1;
1462: }
1463: }
1464:
1465: /*
1466: * get offset for the last header in the chain. m will be kept untainted.
1467: */
1468: int
1.107 christos 1469: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1470: {
1471: int newoff;
1472: int nxt;
1473:
1474: if (!nxtp) {
1475: nxt = -1;
1476: nxtp = &nxt;
1477: }
1.86 rpaulo 1478: for (;;) {
1.18 itojun 1479: newoff = ip6_nexthdr(m, off, proto, nxtp);
1480: if (newoff < 0)
1481: return off;
1482: else if (newoff < off)
1483: return -1; /* invalid */
1484: else if (newoff == off)
1485: return newoff;
1486:
1487: off = newoff;
1488: proto = *nxtp;
1.2 itojun 1489: }
1490: }
1491:
1.81 rpaulo 1492: struct m_tag *
1.107 christos 1493: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1494: {
1495: struct m_tag *mtag;
1496:
1497: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1498: if (!mtag) {
1499: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1500: M_NOWAIT);
1501: if (mtag) {
1502: m_tag_prepend(m, mtag);
1.124 cegger 1503: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1504: }
1505: }
1506: return mtag;
1507: }
1508:
1509: struct m_tag *
1.107 christos 1510: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1511: {
1512: struct m_tag *mtag;
1513:
1514: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1515: return mtag;
1516: }
1517:
1518: void
1.107 christos 1519: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1520: {
1521: struct m_tag *mtag;
1522:
1523: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1524: if (mtag)
1525: m_tag_delete(m, mtag);
1526: }
1527:
1.98 liamjfoy 1528: #ifdef GATEWAY
1529: /*
1530: * sysctl helper routine for net.inet.ip6.maxflows. Since
1531: * we could reduce this value, call ip6flow_reap();
1532: */
1533: static int
1.101 liamjfoy 1534: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1535: {
1.121 simonb 1536: int error;
1.98 liamjfoy 1537:
1.121 simonb 1538: error = sysctl_lookup(SYSCTLFN_CALL(rnode));
1539: if (error || newp == NULL)
1540: return (error);
1.98 liamjfoy 1541:
1.121 simonb 1542: mutex_enter(softnet_lock);
1.122 matt 1543: KERNEL_LOCK(1, NULL);
1.120 matt 1544:
1.121 simonb 1545: ip6flow_reap(0);
1.120 matt 1546:
1547: KERNEL_UNLOCK_ONE(NULL);
1.121 simonb 1548: mutex_exit(softnet_lock);
1.98 liamjfoy 1549:
1.121 simonb 1550: return (0);
1.98 liamjfoy 1551: }
1.99 liamjfoy 1552:
1553: static int
1554: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1555: {
1556: int error, tmp;
1557: struct sysctlnode node;
1558:
1559: node = *rnode;
1560: tmp = ip6_hashsize;
1561: node.sysctl_data = &tmp;
1562: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1563: if (error || newp == NULL)
1564: return (error);
1565:
1566: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1567: /*
1568: * Can only fail due to malloc()
1569: */
1.120 matt 1570: mutex_enter(softnet_lock);
1.122 matt 1571: KERNEL_LOCK(1, NULL);
1.120 matt 1572:
1573: error = ip6flow_invalidate_all(tmp);
1574:
1575: KERNEL_UNLOCK_ONE(NULL);
1576: mutex_exit(softnet_lock);
1.99 liamjfoy 1577: } else {
1578: /*
1579: * EINVAL if not a power of 2
1.121 simonb 1580: */
1.120 matt 1581: error = EINVAL;
1.99 liamjfoy 1582: }
1583:
1.120 matt 1584: return error;
1.99 liamjfoy 1585: }
1.98 liamjfoy 1586: #endif /* GATEWAY */
1587:
1.2 itojun 1588: /*
1589: * System control for IP6
1590: */
1591:
1.120 matt 1592: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1593: 0, 0, 0, 0,
1594: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1595: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1596: EMSGSIZE, EHOSTUNREACH, 0, 0,
1597: 0, 0, 0, 0,
1598: ENOPROTOOPT
1599: };
1600:
1.153 christos 1601: extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS);
1602:
1.116 thorpej 1603: static int
1604: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1605: {
1606:
1.119 thorpej 1607: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1608: }
1609:
1.128 pooka 1610: static void
1611: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1612: {
1.85 rpaulo 1613: #ifdef RFC2292
1614: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1615: #else
1616: #define IS2292(x, y) (y)
1617: #endif
1.26 itojun 1618:
1.73 atatat 1619: sysctl_createv(clog, 0, NULL, NULL,
1620: CTLFLAG_PERMANENT,
1.74 atatat 1621: CTLTYPE_NODE, "inet6",
1622: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1623: NULL, 0, NULL, 0,
1624: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1625: sysctl_createv(clog, 0, NULL, NULL,
1626: CTLFLAG_PERMANENT,
1.74 atatat 1627: CTLTYPE_NODE, "ip6",
1628: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1629: NULL, 0, NULL, 0,
1630: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1631:
1.73 atatat 1632: sysctl_createv(clog, 0, NULL, NULL,
1633: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1634: CTLTYPE_INT, "forwarding",
1635: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1636: NULL, 0, &ip6_forwarding, 0,
1637: CTL_NET, PF_INET6, IPPROTO_IPV6,
1638: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1639: sysctl_createv(clog, 0, NULL, NULL,
1640: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1641: CTLTYPE_INT, "redirect",
1642: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1643: NULL, 0, &ip6_sendredirects, 0,
1644: CTL_NET, PF_INET6, IPPROTO_IPV6,
1645: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1646: sysctl_createv(clog, 0, NULL, NULL,
1647: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1648: CTLTYPE_INT, "hlim",
1649: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1650: NULL, 0, &ip6_defhlim, 0,
1651: CTL_NET, PF_INET6, IPPROTO_IPV6,
1652: IPV6CTL_DEFHLIM, CTL_EOL);
1653: #ifdef notyet
1.73 atatat 1654: sysctl_createv(clog, 0, NULL, NULL,
1655: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1656: CTLTYPE_INT, "mtu", NULL,
1657: NULL, 0, &, 0,
1658: CTL_NET, PF_INET6, IPPROTO_IPV6,
1659: IPV6CTL_DEFMTU, CTL_EOL);
1660: #endif
1661: #ifdef __no_idea__
1.73 atatat 1662: sysctl_createv(clog, 0, NULL, NULL,
1663: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1664: CTLTYPE_INT, "forwsrcrt", NULL,
1665: NULL, 0, &?, 0,
1666: CTL_NET, PF_INET6, IPPROTO_IPV6,
1667: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1668: sysctl_createv(clog, 0, NULL, NULL,
1669: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1670: CTLTYPE_STRUCT, "mrtstats", NULL,
1671: NULL, 0, &?, sizeof(?),
1672: CTL_NET, PF_INET6, IPPROTO_IPV6,
1673: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1674: sysctl_createv(clog, 0, NULL, NULL,
1675: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1676: CTLTYPE_?, "mrtproto", NULL,
1677: NULL, 0, &?, sizeof(?),
1678: CTL_NET, PF_INET6, IPPROTO_IPV6,
1679: IPV6CTL_MRTPROTO, CTL_EOL);
1680: #endif
1.73 atatat 1681: sysctl_createv(clog, 0, NULL, NULL,
1682: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1683: CTLTYPE_INT, "maxfragpackets",
1684: SYSCTL_DESCR("Maximum number of fragments to buffer "
1685: "for reassembly"),
1.70 atatat 1686: NULL, 0, &ip6_maxfragpackets, 0,
1687: CTL_NET, PF_INET6, IPPROTO_IPV6,
1688: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1689: #ifdef __no_idea__
1.73 atatat 1690: sysctl_createv(clog, 0, NULL, NULL,
1691: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1692: CTLTYPE_INT, "sourcecheck", NULL,
1693: NULL, 0, &?, 0,
1694: CTL_NET, PF_INET6, IPPROTO_IPV6,
1695: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1696: sysctl_createv(clog, 0, NULL, NULL,
1697: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1698: CTLTYPE_INT, "sourcecheck_logint", NULL,
1699: NULL, 0, &?, 0,
1700: CTL_NET, PF_INET6, IPPROTO_IPV6,
1701: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1702: #endif
1.73 atatat 1703: sysctl_createv(clog, 0, NULL, NULL,
1704: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1705: CTLTYPE_INT, "accept_rtadv",
1706: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1707: NULL, 0, &ip6_accept_rtadv, 0,
1708: CTL_NET, PF_INET6, IPPROTO_IPV6,
1709: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1710: sysctl_createv(clog, 0, NULL, NULL,
1711: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1712: CTLTYPE_INT, "rtadv_maxroutes",
1713: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1714: NULL, 0, &ip6_rtadv_maxroutes, 0,
1715: CTL_NET, PF_INET6, IPPROTO_IPV6,
1716: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1717: sysctl_createv(clog, 0, NULL, NULL,
1718: CTLFLAG_PERMANENT,
1719: CTLTYPE_INT, "rtadv_numroutes",
1720: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1721: NULL, 0, &nd6_numroutes, 0,
1722: CTL_NET, PF_INET6, IPPROTO_IPV6,
1723: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1724: sysctl_createv(clog, 0, NULL, NULL,
1725: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1726: CTLTYPE_INT, "keepfaith",
1727: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1728: NULL, 0, &ip6_keepfaith, 0,
1729: CTL_NET, PF_INET6, IPPROTO_IPV6,
1730: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1731: sysctl_createv(clog, 0, NULL, NULL,
1732: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1733: CTLTYPE_INT, "log_interval",
1734: SYSCTL_DESCR("Minumum interval between logging "
1735: "unroutable packets"),
1.70 atatat 1736: NULL, 0, &ip6_log_interval, 0,
1737: CTL_NET, PF_INET6, IPPROTO_IPV6,
1738: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1739: sysctl_createv(clog, 0, NULL, NULL,
1740: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1741: CTLTYPE_INT, "hdrnestlimit",
1742: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1743: NULL, 0, &ip6_hdrnestlimit, 0,
1744: CTL_NET, PF_INET6, IPPROTO_IPV6,
1745: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1746: sysctl_createv(clog, 0, NULL, NULL,
1747: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1748: CTLTYPE_INT, "dad_count",
1749: SYSCTL_DESCR("Number of Duplicate Address Detection "
1750: "probes to send"),
1.70 atatat 1751: NULL, 0, &ip6_dad_count, 0,
1752: CTL_NET, PF_INET6, IPPROTO_IPV6,
1753: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1754: sysctl_createv(clog, 0, NULL, NULL,
1755: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1756: CTLTYPE_INT, "auto_flowlabel",
1757: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1758: NULL, 0, &ip6_auto_flowlabel, 0,
1759: CTL_NET, PF_INET6, IPPROTO_IPV6,
1760: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1761: sysctl_createv(clog, 0, NULL, NULL,
1762: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1763: CTLTYPE_INT, "defmcasthlim",
1764: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1765: NULL, 0, &ip6_defmcasthlim, 0,
1766: CTL_NET, PF_INET6, IPPROTO_IPV6,
1767: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.73 atatat 1768: sysctl_createv(clog, 0, NULL, NULL,
1769: CTLFLAG_PERMANENT,
1.74 atatat 1770: CTLTYPE_STRING, "kame_version",
1771: SYSCTL_DESCR("KAME Version"),
1.78 christos 1772: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1773: CTL_NET, PF_INET6, IPPROTO_IPV6,
1774: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1775: sysctl_createv(clog, 0, NULL, NULL,
1776: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1777: CTLTYPE_INT, "use_deprecated",
1778: SYSCTL_DESCR("Allow use of deprecated addresses as "
1779: "source addresses"),
1.70 atatat 1780: NULL, 0, &ip6_use_deprecated, 0,
1781: CTL_NET, PF_INET6, IPPROTO_IPV6,
1782: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1783: sysctl_createv(clog, 0, NULL, NULL,
1784: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1785: CTLTYPE_INT, "rr_prune", NULL,
1786: NULL, 0, &ip6_rr_prune, 0,
1787: CTL_NET, PF_INET6, IPPROTO_IPV6,
1788: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1789: sysctl_createv(clog, 0, NULL, NULL,
1790: CTLFLAG_PERMANENT
1.70 atatat 1791: #ifndef INET6_BINDV6ONLY
1.73 atatat 1792: |CTLFLAG_READWRITE,
1.70 atatat 1793: #endif
1.74 atatat 1794: CTLTYPE_INT, "v6only",
1795: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1796: "to PF_INET sockets"),
1.70 atatat 1797: NULL, 0, &ip6_v6only, 0,
1798: CTL_NET, PF_INET6, IPPROTO_IPV6,
1799: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1800: sysctl_createv(clog, 0, NULL, NULL,
1801: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1802: CTLTYPE_INT, "anonportmin",
1803: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1804: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1805: CTL_NET, PF_INET6, IPPROTO_IPV6,
1806: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1807: sysctl_createv(clog, 0, NULL, NULL,
1808: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1809: CTLTYPE_INT, "anonportmax",
1810: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1811: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1812: CTL_NET, PF_INET6, IPPROTO_IPV6,
1813: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1814: #ifndef IPNOPRIVPORTS
1.73 atatat 1815: sysctl_createv(clog, 0, NULL, NULL,
1816: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1817: CTLTYPE_INT, "lowportmin",
1818: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1819: "to assign"),
1.70 atatat 1820: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1821: CTL_NET, PF_INET6, IPPROTO_IPV6,
1822: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1823: sysctl_createv(clog, 0, NULL, NULL,
1824: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1825: CTLTYPE_INT, "lowportmax",
1826: SYSCTL_DESCR("Highest privileged ephemeral port number "
1827: "to assign"),
1.70 atatat 1828: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1829: CTL_NET, PF_INET6, IPPROTO_IPV6,
1830: IPV6CTL_LOWPORTMAX, CTL_EOL);
1831: #endif /* IPNOPRIVPORTS */
1.73 atatat 1832: sysctl_createv(clog, 0, NULL, NULL,
1833: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.153 christos 1834: CTLTYPE_INT, "auto_linklocal",
1835: SYSCTL_DESCR("Default value of per-interface flag for "
1836: "adding an IPv6 link-local address to "
1837: "interfaces when attached"),
1838: NULL, 0, &ip6_auto_linklocal, 0,
1839: CTL_NET, PF_INET6, IPPROTO_IPV6,
1840: IPV6CTL_AUTO_LINKLOCAL, CTL_EOL);
1841: sysctl_createv(clog, 0, NULL, NULL,
1842: CTLFLAG_PERMANENT|CTLFLAG_READONLY,
1843: CTLTYPE_STRUCT, "addctlpolicy",
1844: SYSCTL_DESCR("Return the current address control"
1845: " policy"),
1846: sysctl_net_inet6_addrctlpolicy, 0, NULL, 0,
1847: CTL_NET, PF_INET6, IPPROTO_IPV6,
1848: IPV6CTL_ADDRCTLPOLICY, CTL_EOL);
1849: sysctl_createv(clog, 0, NULL, NULL,
1850: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1851: CTLTYPE_INT, "use_tempaddr",
1852: SYSCTL_DESCR("Use temporary address"),
1853: NULL, 0, &ip6_use_tempaddr, 0,
1854: CTL_NET, PF_INET6, IPPROTO_IPV6,
1855: CTL_CREATE, CTL_EOL);
1856: sysctl_createv(clog, 0, NULL, NULL,
1857: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.150 roy 1858: CTLTYPE_INT, "prefer_tempaddr",
1859: SYSCTL_DESCR("Prefer temporary address as source "
1860: "address"),
1861: NULL, 0, &ip6_prefer_tempaddr, 0,
1862: CTL_NET, PF_INET6, IPPROTO_IPV6,
1863: CTL_CREATE, CTL_EOL);
1864: sysctl_createv(clog, 0, NULL, NULL,
1865: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1866: CTLTYPE_INT, "temppltime",
1867: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1868: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1869: CTL_NET, PF_INET6, IPPROTO_IPV6,
1870: CTL_CREATE, CTL_EOL);
1871: sysctl_createv(clog, 0, NULL, NULL,
1872: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1873: CTLTYPE_INT, "tempvltime",
1874: SYSCTL_DESCR("valid lifetime of a temporary address"),
1875: NULL, 0, &ip6_temp_valid_lifetime, 0,
1876: CTL_NET, PF_INET6, IPPROTO_IPV6,
1877: CTL_CREATE, CTL_EOL);
1878: sysctl_createv(clog, 0, NULL, NULL,
1879: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1880: CTLTYPE_INT, "maxfrags",
1881: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1882: NULL, 0, &ip6_maxfrags, 0,
1883: CTL_NET, PF_INET6, IPPROTO_IPV6,
1884: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1885: sysctl_createv(clog, 0, NULL, NULL,
1886: CTLFLAG_PERMANENT,
1887: CTLTYPE_STRUCT, "stats",
1888: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1889: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1890: CTL_NET, PF_INET6, IPPROTO_IPV6,
1891: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1892: sysctl_createv(clog, 0, NULL, NULL,
1893: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1894: CTLTYPE_INT, "use_defaultzone",
1895: SYSCTL_DESCR("Whether to use the default scope zones"),
1896: NULL, 0, &ip6_use_defzone, 0,
1897: CTL_NET, PF_INET6, IPPROTO_IPV6,
1898: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1899: sysctl_createv(clog, 0, NULL, NULL,
1900: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1901: CTLTYPE_INT, "mcast_pmtu",
1902: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1903: NULL, 0, &ip6_mcast_pmtu, 0,
1904: CTL_NET, PF_INET6, IPPROTO_IPV6,
1905: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1906: #ifdef GATEWAY
1907: sysctl_createv(clog, 0, NULL, NULL,
1908: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1909: CTLTYPE_INT, "maxflows",
1910: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.101 liamjfoy 1911: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1912: CTL_NET, PF_INET6, IPPROTO_IPV6,
1913: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1914: sysctl_createv(clog, 0, NULL, NULL,
1915: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1916: CTLTYPE_INT, "hashsize",
1917: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1918: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1919: CTL_NET, PF_INET6, IPPROTO_IPV6,
1920: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1921: #endif
1.138 christos 1922: /* anonportalgo RFC6056 subtree */
1.140 christos 1923: const struct sysctlnode *portalgo_node;
1924: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1925: CTLFLAG_PERMANENT,
1926: CTLTYPE_NODE, "anonportalgo",
1927: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1928: NULL, 0, NULL, 0,
1929: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1930: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1931: CTLFLAG_PERMANENT,
1932: CTLTYPE_STRING, "available",
1933: SYSCTL_DESCR("available algorithms"),
1.140 christos 1934: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1935: CTL_CREATE, CTL_EOL);
1.140 christos 1936: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1937: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1938: CTLTYPE_STRING, "selected",
1939: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1940: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1941: CTL_CREATE, CTL_EOL);
1.141 christos 1942: sysctl_createv(clog, 0, &portalgo_node, NULL,
1943: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1944: CTLTYPE_STRUCT, "reserve",
1945: SYSCTL_DESCR("bitmap of reserved ports"),
1946: sysctl_portalgo_reserve6, 0, NULL, 0,
1947: CTL_CREATE, CTL_EOL);
1.139 christos 1948: sysctl_createv(clog, 0, NULL, NULL,
1949: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1950: CTLTYPE_INT, "neighborgcthresh",
1951: SYSCTL_DESCR("Maximum number of entries in neighbor"
1952: " cache"),
1953: NULL, 1, &ip6_neighborgcthresh, 0,
1954: CTL_NET, PF_INET6, IPPROTO_IPV6,
1955: CTL_CREATE, CTL_EOL);
1956: sysctl_createv(clog, 0, NULL, NULL,
1957: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1958: CTLTYPE_INT, "maxifprefixes",
1959: SYSCTL_DESCR("Maximum number of prefixes created by"
1960: " route advertisement per interface"),
1961: NULL, 1, &ip6_maxifprefixes, 0,
1962: CTL_NET, PF_INET6, IPPROTO_IPV6,
1963: CTL_CREATE, CTL_EOL);
1964: sysctl_createv(clog, 0, NULL, NULL,
1965: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1966: CTLTYPE_INT, "maxifdefrouters",
1967: SYSCTL_DESCR("Maximum number of default routers created"
1968: " by route advertisement per interface"),
1969: NULL, 1, &ip6_maxifdefrouters, 0,
1970: CTL_NET, PF_INET6, IPPROTO_IPV6,
1971: CTL_CREATE, CTL_EOL);
1972: sysctl_createv(clog, 0, NULL, NULL,
1973: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1974: CTLTYPE_INT, "maxdynroutes",
1975: SYSCTL_DESCR("Maximum number of routes created via"
1976: " redirect"),
1977: NULL, 1, &ip6_maxdynroutes, 0,
1978: CTL_NET, PF_INET6, IPPROTO_IPV6,
1979: CTL_CREATE, CTL_EOL);
1.2 itojun 1980: }
1.116 thorpej 1981:
1982: void
1983: ip6_statinc(u_int stat)
1984: {
1985:
1986: KASSERT(stat < IP6_NSTATS);
1987: IP6_STATINC(stat);
1988: }
CVSweb <webmaster@jp.NetBSD.org>