Annotation of src/sys/netinet6/ip6_input.c, Revision 1.156
1.156 ! ozaki-r 1: /* $NetBSD: ip6_input.c,v 1.155 2016/02/04 02:48:37 riastradh 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>
1.156 ! ozaki-r 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.155 2016/02/04 02:48:37 riastradh 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];
136: struct in6_ifaddr *in6_ifaddr;
1.148 rmind 137: pktqueue_t *ip6_pktq __read_mostly;
1.2 itojun 138:
139: int ip6_forward_srcrt; /* XXX */
140: int ip6_sourcecheck; /* XXX */
141: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 142:
1.143 rmind 143: pfil_head_t *inet6_pfil_hook;
1.29 thorpej 144:
1.116 thorpej 145: percpu_t *ip6stat_percpu;
1.2 itojun 146:
1.156 ! ozaki-r 147: static void ip6_init2(void);
1.148 rmind 148: static void ip6intr(void *);
1.112 dyoung 149: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 150:
1.136 drochner 151: static int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
152: u_int32_t *);
1.111 dyoung 153: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.128 pooka 154: static void sysctl_net_inet6_ip6_setup(struct sysctllog **);
1.2 itojun 155:
156: /*
157: * IP6 initialization: fill in IP6 protocol switch table.
158: * All protocols not implemented in kernel go to raw IP6 protocol handler.
159: */
160: void
1.114 matt 161: ip6_init(void)
1.2 itojun 162: {
1.78 christos 163: const struct ip6protosw *pr;
1.35 itojun 164: int i;
1.2 itojun 165:
1.128 pooka 166: sysctl_net_inet6_ip6_setup(NULL);
1.78 christos 167: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 168: if (pr == 0)
169: panic("ip6_init");
170: for (i = 0; i < IPPROTO_MAX; i++)
171: ip6_protox[i] = pr - inet6sw;
1.78 christos 172: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
173: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 174: if (pr->pr_domain->dom_family == PF_INET6 &&
175: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
176: ip6_protox[pr->pr_protocol] = pr - inet6sw;
1.148 rmind 177:
1.149 ozaki-r 178: ip6_pktq = pktq_create(IFQ_MAXLEN, ip6intr, NULL);
1.148 rmind 179: KASSERT(ip6_pktq != NULL);
180:
1.81 rpaulo 181: scope6_init();
182: addrsel_policy_init();
1.2 itojun 183: nd6_init();
184: frag6_init();
1.133 tls 185: ip6_desync_factor = cprng_fast32() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 186:
1.156 ! ozaki-r 187: ip6_init2();
1.98 liamjfoy 188: #ifdef GATEWAY
1.99 liamjfoy 189: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 190: #endif
1.29 thorpej 191: /* Register our Packet Filter hook. */
1.143 rmind 192: inet6_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET6);
193: KASSERT(inet6_pfil_hook != NULL);
1.116 thorpej 194:
195: ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS);
1.2 itojun 196: }
197:
198: static void
1.156 ! ozaki-r 199: ip6_init2(void)
1.2 itojun 200: {
201:
1.83 rpaulo 202: /* timer for regeneranation of temporary addresses randomize ID */
1.118 ad 203: callout_init(&in6_tmpaddrtimer_ch, CALLOUT_MPSAFE);
1.83 rpaulo 204: callout_reset(&in6_tmpaddrtimer_ch,
205: (ip6_temp_preferred_lifetime - ip6_desync_factor -
206: ip6_temp_regen_advance) * hz,
207: in6_tmpaddrtimer, NULL);
1.2 itojun 208: }
209:
210: /*
211: * IP6 input interrupt handling. Just pass the packet to ip6_input.
212: */
1.148 rmind 213: static void
214: ip6intr(void *arg __unused)
1.2 itojun 215: {
216: struct mbuf *m;
217:
1.118 ad 218: mutex_enter(softnet_lock);
1.148 rmind 219: while ((m = pktq_dequeue(ip6_pktq)) != NULL) {
220: const ifnet_t *ifp = m->m_pkthdr.rcvif;
221:
222: /*
223: * Drop the packet if IPv6 is disabled on the interface.
224: */
225: if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) {
1.83 rpaulo 226: m_freem(m);
1.148 rmind 227: continue;
1.83 rpaulo 228: }
1.2 itojun 229: ip6_input(m);
230: }
1.118 ad 231: mutex_exit(softnet_lock);
1.2 itojun 232: }
233:
1.103 dyoung 234: extern struct route ip6_forward_rt;
1.2 itojun 235:
236: void
1.96 dyoung 237: ip6_input(struct mbuf *m)
1.2 itojun 238: {
1.9 itojun 239: struct ip6_hdr *ip6;
1.105 dyoung 240: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 241: u_int32_t plen;
1.5 itojun 242: u_int32_t rtalert = ~0;
1.104 yamt 243: int nxt, ours = 0, rh_present = 0;
1.9 itojun 244: struct ifnet *deliverifp = NULL;
1.64 itojun 245: int srcrt = 0;
1.105 dyoung 246: const struct rtentry *rt;
247: union {
248: struct sockaddr dst;
249: struct sockaddr_in6 dst6;
250: } u;
1.2 itojun 251:
252: /*
1.81 rpaulo 253: * make sure we don't have onion peering information into m_tag.
254: */
255: ip6_delaux(m);
256:
257: /*
1.44 itojun 258: * mbuf statistics
1.2 itojun 259: */
260: if (m->m_flags & M_EXT) {
261: if (m->m_next)
1.116 thorpej 262: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 263: else
1.116 thorpej 264: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 265: } else {
1.115 thorpej 266: #define M2MMAX 32
1.2 itojun 267: if (m->m_next) {
1.9 itojun 268: if (m->m_flags & M_LOOP) {
1.116 thorpej 269: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.115 thorpej 270: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX) {
1.116 thorpej 271: IP6_STATINC(IP6_STAT_M2M +
272: m->m_pkthdr.rcvif->if_index);
1.115 thorpej 273: } else
1.116 thorpej 274: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 275: } else
1.116 thorpej 276: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 277: #undef M2MMAX
1.2 itojun 278: }
279:
1.9 itojun 280: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
1.116 thorpej 281: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 282:
1.57 thorpej 283: /*
284: * If the IPv6 header is not aligned, slurp it up into a new
285: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 286: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 287: * IPv6 header is in the first mbuf of the chain.
288: */
1.97 christos 289: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 290: struct ifnet *inifp = m->m_pkthdr.rcvif;
291: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
292: (max_linkhdr + 3) & ~3)) == NULL) {
293: /* XXXJRT new stat, please */
1.116 thorpej 294: IP6_STATINC(IP6_STAT_TOOSMALL);
1.57 thorpej 295: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
296: return;
297: }
298: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
299: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 300: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 301: IP6_STATINC(IP6_STAT_TOOSMALL);
1.9 itojun 302: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
303: return;
304: }
1.2 itojun 305: }
306:
307: ip6 = mtod(m, struct ip6_hdr *);
308:
309: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 310: IP6_STATINC(IP6_STAT_BADVERS);
1.9 itojun 311: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 312: goto bad;
313: }
1.15 darrenr 314:
1.98 liamjfoy 315: /*
316: * Assume that we can create a fast-forward IP flow entry
317: * based on this packet.
318: */
319: m->m_flags |= M_CANFASTFWD;
320:
1.15 darrenr 321: /*
322: * Run through list of hooks for input packets. If there are any
323: * filters which require that additional packets in the flow are
324: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
325: * Note that filters must _never_ set this flag, as another filter
326: * in the list may have previously cleared it.
327: */
1.39 itojun 328: /*
329: * let ipfilter look at packet on the wire,
330: * not the decapsulated packet.
331: */
1.142 christos 332: #if defined(IPSEC)
1.146 christos 333: if (!ipsec_used || !ipsec_indone(m))
1.39 itojun 334: #else
335: if (1)
336: #endif
337: {
1.64 itojun 338: struct in6_addr odst;
339:
340: odst = ip6->ip6_dst;
1.143 rmind 341: if (pfil_run_hooks(inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
1.39 itojun 342: PFIL_IN) != 0)
343: return;
344: if (m == NULL)
345: return;
346: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 347: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 348: }
1.15 darrenr 349:
1.116 thorpej 350: IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt);
1.2 itojun 351:
1.30 thorpej 352: #ifdef ALTQ
353: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
354: /* packet is dropped by traffic conditioner */
355: return;
1.9 itojun 356: }
357: #endif
358:
1.2 itojun 359: /*
1.44 itojun 360: * Check against address spoofing/corruption.
1.2 itojun 361: */
362: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
363: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 364: /*
365: * XXX: "badscope" is not very suitable for a multicast source.
366: */
1.116 thorpej 367: IP6_STATINC(IP6_STAT_BADSCOPE);
1.9 itojun 368: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 369: goto bad;
370: }
1.13 itojun 371: /*
1.44 itojun 372: * The following check is not documented in specs. A malicious
373: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
374: * and bypass security checks (act as if it was from 127.0.0.1 by using
375: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 376: *
1.44 itojun 377: * This check chokes if we are in an SIIT cloud. As none of BSDs
378: * support IPv4-less kernel compilation, we cannot support SIIT
379: * environment at all. So, it makes more sense for us to reject any
380: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 381: * partial support for SIIT environment.
1.13 itojun 382: */
383: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
384: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 385: IP6_STATINC(IP6_STAT_BADSCOPE);
1.13 itojun 386: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
387: goto bad;
388: }
1.17 itojun 389: #if 0
1.13 itojun 390: /*
1.17 itojun 391: * Reject packets with IPv4 compatible addresses (auto tunnel).
392: *
393: * The code forbids auto tunnel relay case in RFC1933 (the check is
394: * stronger than RFC1933). We may want to re-enable it if mech-xx
395: * is revised to forbid relaying case.
1.13 itojun 396: */
397: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
398: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
1.116 thorpej 399: IP6_STATINC(IP6_STAT_BADSCOPE);
1.13 itojun 400: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
401: goto bad;
402: }
403: #endif
1.35 itojun 404:
1.2 itojun 405: /*
1.82 yamt 406: * Disambiguate address scope zones (if there is ambiguity).
407: * We first make sure that the original source or destination address
408: * is not in our internal form for scoped addresses. Such addresses
409: * are not necessarily invalid spec-wise, but we cannot accept them due
410: * to the usage conflict.
411: * in6_setscope() then also checks and rejects the cases where src or
412: * dst are the loopback address and the receiving interface
413: * is not loopback.
414: */
1.88 bouyer 415: if (__predict_false(
416: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
417: goto bad;
418: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 419: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 420: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 421: goto bad;
422: }
423: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
424: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
1.116 thorpej 425: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 426: goto bad;
427: }
428:
429: /*
1.2 itojun 430: * Multicast check
431: */
432: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
433: struct in6_multi *in6m = 0;
1.9 itojun 434:
435: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 436: /*
437: * See if we belong to the destination multicast group on the
438: * arrival interface.
439: */
440: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
441: if (in6m)
442: ours = 1;
443: else if (!ip6_mrouter) {
1.116 thorpej 444: uint64_t *ip6s = IP6_STAT_GETREF();
445: ip6s[IP6_STAT_NOTMEMBER]++;
446: ip6s[IP6_STAT_CANTFORWARD]++;
447: IP6_STAT_PUTREF();
1.9 itojun 448: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 449: goto bad;
450: }
1.9 itojun 451: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 452: goto hbhcheck;
453: }
454:
1.105 dyoung 455: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
456:
1.2 itojun 457: /*
458: * Unicast check
459: */
1.105 dyoung 460: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
461: if (hit)
1.116 thorpej 462: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 463: else
1.116 thorpej 464: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 465:
1.109 dyoung 466: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 467:
468: /*
469: * Accept the packet if the forwarding interface to the destination
470: * according to the routing table is the loopback interface,
471: * unless the associated route has a gateway.
472: * Note that this approach causes to accept a packet if there is a
473: * route to the loopback interface for the destination of the packet.
474: * But we think it's even useful in some situations, e.g. when using
475: * a special daemon which wants to intercept the packet.
476: */
1.105 dyoung 477: if (rt != NULL &&
478: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
479: !(rt->rt_flags & RTF_CLONED) &&
1.2 itojun 480: #if 0
481: /*
482: * The check below is redundant since the comparison of
483: * the destination and the key of the rtentry has
484: * already done through looking up the routing table.
485: */
1.109 dyoung 486: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 487: #endif
1.105 dyoung 488: rt->rt_ifp->if_type == IFT_LOOP) {
489: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 490: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
491: m->m_flags |= M_ANYCAST6;
1.24 itojun 492: /*
493: * packets to a tentative, duplicated, or somehow invalid
494: * address must not be accepted.
495: */
1.2 itojun 496: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 497: /* this address is ready */
1.2 itojun 498: ours = 1;
1.9 itojun 499: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 500: goto hbhcheck;
501: } else {
1.24 itojun 502: /* address is not ready, so discard the packet. */
1.34 itojun 503: nd6log((LOG_INFO,
1.27 itojun 504: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 505: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 506: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 507:
508: goto bad;
1.2 itojun 509: }
510: }
511:
512: /*
1.55 itojun 513: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 514: */
515: #if defined(NFAITH) && 0 < NFAITH
516: if (ip6_keepfaith) {
1.105 dyoung 517: if (rt != NULL && rt->rt_ifp != NULL &&
518: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 519: /* XXX do we need more sanity checks? */
520: ours = 1;
1.105 dyoung 521: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 522: goto hbhcheck;
523: }
524: }
525: #endif
526:
527: #if 0
528: {
529: /*
530: * Last resort: check in6_ifaddr for incoming interface.
531: * The code is here until I update the "goto ours hack" code above
532: * working right.
533: */
534: struct ifaddr *ifa;
1.113 dyoung 535: IFADDR_FOREACH(ifa, m->m_pkthdr.rcvif) {
1.9 itojun 536: if (ifa->ifa_addr == NULL)
537: continue; /* just for safety */
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);
1.9 itojun 555: in6_ifstat_inc(m->m_pkthdr.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*/
590: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
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);
1.22 itojun 610: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
611: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
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);
1.9 itojun 643: in6_ifstat_inc(m->m_pkthdr.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: */
666: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.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);
1.25 itojun 694: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
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);
1.104 yamt 717: in6_ifstat_inc(m->m_pkthdr.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);
1.9 itojun 727: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 728: goto bad;
729: }
730:
1.104 yamt 731: if (nxt == IPPROTO_ROUTING) {
732: if (rh_present++) {
733: in6_ifstat_inc(m->m_pkthdr.rcvif,
734: ifs6_in_hdrerr);
1.116 thorpej 735: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 736: goto bad;
737: }
738: }
739:
1.142 christos 740: #ifdef IPSEC
1.146 christos 741: if (ipsec_used) {
1.94 degroote 742: /*
1.146 christos 743: * enforce IPsec policy checking if we are seeing last
744: * header. note that we do not visit this with
745: * protocols with pcb layer code - like udp/tcp/raw ip.
1.94 degroote 746: */
1.146 christos 747: if ((inet6sw[ip_protox[nxt]].pr_flags
748: & PR_LASTHDR) != 0) {
1.151 ozaki-r 749: int error = ipsec6_input(m);
1.146 christos 750: if (error)
751: goto bad;
752: }
1.94 degroote 753: }
1.142 christos 754: #endif /* IPSEC */
1.94 degroote 755:
1.2 itojun 756: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
757: }
758: return;
759: bad:
760: m_freem(m);
761: }
762:
763: /*
1.81 rpaulo 764: * set/grab in6_ifaddr correspond to IPv6 destination address.
765: */
766: static struct m_tag *
1.112 dyoung 767: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 768: {
769: struct m_tag *mtag;
1.144 christos 770: struct ip6aux *ip6a;
1.81 rpaulo 771:
772: mtag = ip6_addaux(m);
1.144 christos 773: if (mtag == NULL)
774: return NULL;
1.112 dyoung 775:
1.144 christos 776: ip6a = (struct ip6aux *)(mtag + 1);
777: if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) {
778: IP6_STATINC(IP6_STAT_BADSCOPE);
779: return NULL;
1.112 dyoung 780: }
1.144 christos 781:
782: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
783: ip6a->ip6a_flags = ia->ia6_flags;
784: return mtag;
1.81 rpaulo 785: }
786:
1.112 dyoung 787: const struct ip6aux *
1.107 christos 788: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 789: {
790: struct m_tag *mtag;
791:
792: mtag = ip6_findaux(m);
1.112 dyoung 793: if (mtag != NULL)
794: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 795: else
796: return NULL;
797: }
798:
799: /*
1.2 itojun 800: * Hop-by-Hop options header processing. If a valid jumbo payload option is
801: * included, the real payload length will be stored in plenp.
1.107 christos 802: *
803: * rtalertp - XXX: should be stored more smart way
1.2 itojun 804: */
1.136 drochner 805: int
1.107 christos 806: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
807: struct mbuf **mp, int *offp)
1.2 itojun 808: {
1.35 itojun 809: struct mbuf *m = *mp;
1.2 itojun 810: int off = *offp, hbhlen;
811: struct ip6_hbh *hbh;
812:
813: /* validation of the length of the header */
1.9 itojun 814: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
815: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
816: if (hbh == NULL) {
1.116 thorpej 817: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 818: return -1;
819: }
820: hbhlen = (hbh->ip6h_len + 1) << 3;
821: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
822: hbhlen);
823: if (hbh == NULL) {
1.116 thorpej 824: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 825: return -1;
826: }
1.57 thorpej 827: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 828: off += hbhlen;
829: hbhlen -= sizeof(struct ip6_hbh);
830:
831: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
832: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 833: return (-1);
1.2 itojun 834:
835: *offp = off;
836: *mp = m;
1.58 itojun 837: return (0);
1.2 itojun 838: }
839:
840: /*
841: * Search header for all Hop-by-hop options and process each option.
842: * This function is separate from ip6_hopopts_input() in order to
843: * handle a case where the sending node itself process its hop-by-hop
844: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 845: *
846: * The function assumes that hbh header is located right after the IPv6 header
847: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
848: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 849: */
1.136 drochner 850: static int
1.107 christos 851: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
852: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 853: {
854: struct ip6_hdr *ip6;
855: int optlen = 0;
856: u_int8_t *opt = opthead;
857: u_int16_t rtalert_val;
1.22 itojun 858: u_int32_t jumboplen;
1.55 itojun 859: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 860:
861: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 862: switch (*opt) {
863: case IP6OPT_PAD1:
864: optlen = 1;
865: break;
866: case IP6OPT_PADN:
867: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 868: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 869: goto bad;
870: }
871: optlen = *(opt + 1) + 2;
872: break;
873: case IP6OPT_RTALERT:
874: /* XXX may need check for alignment */
875: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 876: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 877: goto bad;
878: }
879: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 880: /* XXX stat */
881: icmp6_error(m, ICMP6_PARAM_PROB,
882: ICMP6_PARAMPROB_HEADER,
883: erroff + opt + 1 - opthead);
884: return (-1);
1.35 itojun 885: }
886: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 887: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 888: *rtalertp = ntohs(rtalert_val);
889: break;
890: case IP6OPT_JUMBO:
1.22 itojun 891: /* XXX may need check for alignment */
892: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 893: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 894: goto bad;
895: }
1.35 itojun 896: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 897: /* XXX stat */
898: icmp6_error(m, ICMP6_PARAM_PROB,
899: ICMP6_PARAMPROB_HEADER,
900: erroff + opt + 1 - opthead);
901: return (-1);
1.35 itojun 902: }
1.22 itojun 903: optlen = IP6OPT_JUMBO_LEN;
904:
905: /*
906: * IPv6 packets that have non 0 payload length
1.35 itojun 907: * must not contain a jumbo payload option.
1.22 itojun 908: */
909: ip6 = mtod(m, struct ip6_hdr *);
910: if (ip6->ip6_plen) {
1.116 thorpej 911: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 912: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 913: ICMP6_PARAMPROB_HEADER,
914: erroff + opt - opthead);
915: return (-1);
1.22 itojun 916: }
1.2 itojun 917:
1.22 itojun 918: /*
919: * We may see jumbolen in unaligned location, so
920: * we'd need to perform bcopy().
921: */
1.126 tsutsui 922: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 923: jumboplen = (u_int32_t)htonl(jumboplen);
924:
925: #if 1
926: /*
927: * if there are multiple jumbo payload options,
928: * *plenp will be non-zero and the packet will be
929: * rejected.
930: * the behavior may need some debate in ipngwg -
931: * multiple options does not make sense, however,
932: * there's no explicit mention in specification.
933: */
934: if (*plenp != 0) {
1.116 thorpej 935: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 936: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 937: ICMP6_PARAMPROB_HEADER,
938: erroff + opt + 2 - opthead);
939: return (-1);
1.22 itojun 940: }
1.8 itojun 941: #endif
1.2 itojun 942:
1.22 itojun 943: /*
944: * jumbo payload length must be larger than 65535.
945: */
946: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 947: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 948: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 949: ICMP6_PARAMPROB_HEADER,
950: erroff + opt + 2 - opthead);
951: return (-1);
1.22 itojun 952: }
953: *plenp = jumboplen;
954:
955: break;
1.35 itojun 956: default: /* unknown option */
957: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 958: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 959: goto bad;
960: }
1.55 itojun 961: optlen = ip6_unknown_opt(opt, m,
962: erroff + opt - opthead);
963: if (optlen == -1)
964: return (-1);
1.35 itojun 965: optlen += 2;
966: break;
1.2 itojun 967: }
968: }
969:
1.55 itojun 970: return (0);
1.2 itojun 971:
972: bad:
973: m_freem(m);
1.55 itojun 974: return (-1);
1.2 itojun 975: }
976:
977: /*
978: * Unknown option processing.
979: * The third argument `off' is the offset from the IPv6 header to the option,
980: * which is necessary if the IPv6 header the and option header and IPv6 header
981: * is not continuous in order to return an ICMPv6 error.
982: */
983: int
1.107 christos 984: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 985: {
986: struct ip6_hdr *ip6;
987:
1.35 itojun 988: switch (IP6OPT_TYPE(*optp)) {
989: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 990: return ((int)*(optp + 1));
1.35 itojun 991: case IP6OPT_TYPE_DISCARD: /* silently discard */
992: m_freem(m);
1.58 itojun 993: return (-1);
1.35 itojun 994: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 995: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 996: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 997: return (-1);
1.35 itojun 998: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 999: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1000: ip6 = mtod(m, struct ip6_hdr *);
1001: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1002: (m->m_flags & (M_BCAST|M_MCAST)))
1003: m_freem(m);
1004: else
1005: icmp6_error(m, ICMP6_PARAM_PROB,
1006: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1007: return (-1);
1.2 itojun 1008: }
1009:
1010: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1011: return (-1);
1.2 itojun 1012: }
1013:
1014: /*
1.9 itojun 1015: * Create the "control" list for this pcb.
1016: *
1017: * The routine will be called from upper layer handlers like tcp6_input().
1018: * Thus the routine assumes that the caller (tcp6_input) have already
1019: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1020: * very first mbuf on the mbuf chain.
1021: * We may want to add some infinite loop prevention or sanity checks for safety.
1022: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1023: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1024: */
1025: void
1.107 christos 1026: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1027: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1028: {
1.85 rpaulo 1029: #ifdef RFC2292
1030: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1031: #else
1032: #define IS2292(x, y) (y)
1033: #endif
1034:
1.123 christos 1035: if (in6p->in6p_socket->so_options & SO_TIMESTAMP
1036: #ifdef SO_OTIMESTAMP
1037: || in6p->in6p_socket->so_options & SO_OTIMESTAMP
1038: #endif
1039: ) {
1.2 itojun 1040: struct timeval tv;
1041:
1042: microtime(&tv);
1.123 christos 1043: #ifdef SO_OTIMESTAMP
1044: if (in6p->in6p_socket->so_options & SO_OTIMESTAMP) {
1045: struct timeval50 tv50;
1046: timeval_to_timeval50(&tv, &tv50);
1047: *mp = sbcreatecontrol((void *) &tv50, sizeof(tv50),
1048: SCM_OTIMESTAMP, SOL_SOCKET);
1049: } else
1050: #endif
1.97 christos 1051: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1052: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1053: if (*mp)
1054: mp = &(*mp)->m_next;
1055: }
1.87 rpaulo 1056:
1057: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1058: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1059: return;
1060:
1.2 itojun 1061: /* RFC 2292 sec. 5 */
1.35 itojun 1062: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1063: struct in6_pktinfo pi6;
1.85 rpaulo 1064:
1.126 tsutsui 1065: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1066: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1067: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1068: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1069: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1070: sizeof(struct in6_pktinfo),
1071: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1072: if (*mp)
1073: mp = &(*mp)->m_next;
1074: }
1.85 rpaulo 1075:
1.2 itojun 1076: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1077: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1078:
1.97 christos 1079: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1080: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1081: if (*mp)
1082: mp = &(*mp)->m_next;
1083: }
1084:
1085: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1086: u_int32_t flowinfo;
1087: int tclass;
1088:
1089: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1090: flowinfo >>= 20;
1091:
1092: tclass = flowinfo & 0xff;
1.97 christos 1093: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1094: IPV6_TCLASS, IPPROTO_IPV6);
1095:
1.2 itojun 1096: if (*mp)
1097: mp = &(*mp)->m_next;
1098: }
1099:
1100: /*
1.75 itojun 1101: * IPV6_HOPOPTS socket option. Recall that we required super-user
1102: * privilege for the option (see ip6_ctloutput), but it might be too
1103: * strict, since there might be some hop-by-hop options which can be
1104: * returned to normal user.
1.85 rpaulo 1105: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1106: */
1.75 itojun 1107: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1108: /*
1109: * Check if a hop-by-hop options header is contatined in the
1110: * received packet, and if so, store the options as ancillary
1111: * data. Note that a hop-by-hop options header must be
1112: * just after the IPv6 header, which fact is assured through
1113: * the IPv6 input processing.
1114: */
1.78 christos 1115: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1116: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1117: struct ip6_hbh *hbh;
1118: int hbhlen;
1.62 itojun 1119: struct mbuf *ext;
1.9 itojun 1120:
1.62 itojun 1121: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1122: xip6->ip6_nxt);
1.62 itojun 1123: if (ext == NULL) {
1.116 thorpej 1124: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1125: return;
1126: }
1.62 itojun 1127: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1128: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1129: if (hbhlen != ext->m_len) {
1130: m_freem(ext);
1.116 thorpej 1131: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1132: return;
1133: }
1.2 itojun 1134:
1135: /*
1136: * XXX: We copy whole the header even if a jumbo
1137: * payload option is included, which option is to
1138: * be removed before returning in the RFC 2292.
1.85 rpaulo 1139: * Note: this constraint is removed in RFC3542.
1.2 itojun 1140: */
1.97 christos 1141: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1142: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1143: IPPROTO_IPV6);
1.2 itojun 1144: if (*mp)
1145: mp = &(*mp)->m_next;
1.62 itojun 1146: m_freem(ext);
1.2 itojun 1147: }
1148: }
1149:
1150: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1151: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1152: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1153: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1154:
1155: /*
1156: * Search for destination options headers or routing
1157: * header(s) through the header chain, and stores each
1158: * header as ancillary data.
1159: * Note that the order of the headers remains in
1160: * the chain of ancillary data.
1161: */
1.86 rpaulo 1162: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1163: struct ip6_ext *ip6e = NULL;
1.9 itojun 1164: int elen;
1.62 itojun 1165: struct mbuf *ext = NULL;
1.9 itojun 1166:
1.62 itojun 1167: /*
1168: * if it is not an extension header, don't try to
1169: * pull it from the chain.
1170: */
1171: switch (nxt) {
1172: case IPPROTO_DSTOPTS:
1173: case IPPROTO_ROUTING:
1174: case IPPROTO_HOPOPTS:
1175: case IPPROTO_AH: /* is it possible? */
1176: break;
1177: default:
1178: goto loopend;
1179: }
1180:
1181: ext = ip6_pullexthdr(m, off, nxt);
1182: if (ext == NULL) {
1.116 thorpej 1183: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1184: return;
1185: }
1.62 itojun 1186: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1187: if (nxt == IPPROTO_AH)
1188: elen = (ip6e->ip6e_len + 2) << 2;
1189: else
1190: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1191: if (elen != ext->m_len) {
1192: m_freem(ext);
1.116 thorpej 1193: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1194: return;
1195: }
1.57 thorpej 1196: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1197:
1.35 itojun 1198: switch (nxt) {
1.62 itojun 1199: case IPPROTO_DSTOPTS:
1.127 martin 1200: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1201: break;
1202:
1.97 christos 1203: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1204: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1205: IPPROTO_IPV6);
1.35 itojun 1206: if (*mp)
1207: mp = &(*mp)->m_next;
1208: break;
1209:
1210: case IPPROTO_ROUTING:
1.127 martin 1211: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1212: break;
1213:
1.97 christos 1214: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1215: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1216: IPPROTO_IPV6);
1.35 itojun 1217: if (*mp)
1218: mp = &(*mp)->m_next;
1219: break;
1220:
1.62 itojun 1221: case IPPROTO_HOPOPTS:
1222: case IPPROTO_AH: /* is it possible? */
1223: break;
1224:
1.35 itojun 1225: default:
1226: /*
1.62 itojun 1227: * other cases have been filtered in the above.
1228: * none will visit this case. here we supply
1229: * the code just in case (nxt overwritten or
1230: * other cases).
1.35 itojun 1231: */
1.62 itojun 1232: m_freem(ext);
1.35 itojun 1233: goto loopend;
1234:
1.2 itojun 1235: }
1236:
1237: /* proceed with the next header. */
1.9 itojun 1238: off += elen;
1.2 itojun 1239: nxt = ip6e->ip6e_nxt;
1.62 itojun 1240: ip6e = NULL;
1241: m_freem(ext);
1242: ext = NULL;
1.2 itojun 1243: }
1244: loopend:
1.62 itojun 1245: ;
1.2 itojun 1246: }
1.62 itojun 1247: }
1.85 rpaulo 1248: #undef IS2292
1249:
1250:
1251: void
1.95 dyoung 1252: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1253: uint32_t *mtu)
1.85 rpaulo 1254: {
1255: struct socket *so;
1256: struct mbuf *m_mtu;
1257: struct ip6_mtuinfo mtuctl;
1258:
1259: so = in6p->in6p_socket;
1260:
1261: if (mtu == NULL)
1262: return;
1263:
1264: #ifdef DIAGNOSTIC
1265: if (so == NULL) /* I believe this is impossible */
1266: panic("ip6_notify_pmtu: socket is NULL");
1267: #endif
1268:
1269: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1270: mtuctl.ip6m_mtu = *mtu;
1271: mtuctl.ip6m_addr = *dst;
1272: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1273: return;
1274:
1.97 christos 1275: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1276: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1277: return;
1278:
1.95 dyoung 1279: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1280: == 0) {
1281: m_freem(m_mtu);
1282: /* XXX: should count statistics */
1283: } else
1284: sorwakeup(so);
1285:
1286: return;
1287: }
1.62 itojun 1288:
1289: /*
1290: * pull single extension header from mbuf chain. returns single mbuf that
1291: * contains the result, or NULL on error.
1292: */
1293: static struct mbuf *
1.107 christos 1294: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1295: {
1296: struct ip6_ext ip6e;
1297: size_t elen;
1298: struct mbuf *n;
1299:
1300: #ifdef DIAGNOSTIC
1301: switch (nxt) {
1302: case IPPROTO_DSTOPTS:
1303: case IPPROTO_ROUTING:
1304: case IPPROTO_HOPOPTS:
1305: case IPPROTO_AH: /* is it possible? */
1306: break;
1307: default:
1308: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1309: }
1.62 itojun 1310: #endif
1.2 itojun 1311:
1.97 christos 1312: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1313: if (nxt == IPPROTO_AH)
1314: elen = (ip6e.ip6e_len + 2) << 2;
1315: else
1316: elen = (ip6e.ip6e_len + 1) << 3;
1317:
1318: MGET(n, M_DONTWAIT, MT_DATA);
1319: if (n && elen >= MLEN) {
1320: MCLGET(n, M_DONTWAIT);
1321: if ((n->m_flags & M_EXT) == 0) {
1322: m_free(n);
1323: n = NULL;
1324: }
1325: }
1326: if (!n)
1327: return NULL;
1328:
1329: n->m_len = 0;
1330: if (elen >= M_TRAILINGSPACE(n)) {
1331: m_free(n);
1332: return NULL;
1333: }
1334:
1.97 christos 1335: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1336: n->m_len = elen;
1337: return n;
1.2 itojun 1338: }
1339:
1340: /*
1341: * Get pointer to the previous header followed by the header
1342: * currently processed.
1343: * XXX: This function supposes that
1344: * M includes all headers,
1345: * the next header field and the header length field of each header
1346: * are valid, and
1347: * the sum of each header length equals to OFF.
1348: * Because of these assumptions, this function must be called very
1349: * carefully. Moreover, it will not be used in the near future when
1350: * we develop `neater' mechanism to process extension headers.
1351: */
1.58 itojun 1352: u_int8_t *
1.107 christos 1353: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1354: {
1355: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1356:
1357: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1358: return (&ip6->ip6_nxt);
1.2 itojun 1359: else {
1360: int len, nxt;
1361: struct ip6_ext *ip6e = NULL;
1362:
1363: nxt = ip6->ip6_nxt;
1364: len = sizeof(struct ip6_hdr);
1365: while (len < off) {
1.97 christos 1366: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1367:
1.35 itojun 1368: switch (nxt) {
1.2 itojun 1369: case IPPROTO_FRAGMENT:
1370: len += sizeof(struct ip6_frag);
1371: break;
1372: case IPPROTO_AH:
1373: len += (ip6e->ip6e_len + 2) << 2;
1374: break;
1375: default:
1376: len += (ip6e->ip6e_len + 1) << 3;
1377: break;
1378: }
1379: nxt = ip6e->ip6e_nxt;
1380: }
1381: if (ip6e)
1.58 itojun 1382: return (&ip6e->ip6e_nxt);
1.2 itojun 1383: else
1384: return NULL;
1.18 itojun 1385: }
1386: }
1387:
1388: /*
1389: * get next header offset. m will be retained.
1390: */
1391: int
1.107 christos 1392: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1393: {
1394: struct ip6_hdr ip6;
1395: struct ip6_ext ip6e;
1396: struct ip6_frag fh;
1397:
1398: /* just in case */
1399: if (m == NULL)
1400: panic("ip6_nexthdr: m == NULL");
1401: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1402: return -1;
1403:
1404: switch (proto) {
1405: case IPPROTO_IPV6:
1.83 rpaulo 1406: /* do not chase beyond intermediate IPv6 headers */
1407: if (off != 0)
1408: return -1;
1.18 itojun 1409: if (m->m_pkthdr.len < off + sizeof(ip6))
1410: return -1;
1.97 christos 1411: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1412: if (nxtp)
1413: *nxtp = ip6.ip6_nxt;
1414: off += sizeof(ip6);
1415: return off;
1416:
1417: case IPPROTO_FRAGMENT:
1418: /*
1419: * terminate parsing if it is not the first fragment,
1420: * it does not make sense to parse through it.
1421: */
1422: if (m->m_pkthdr.len < off + sizeof(fh))
1423: return -1;
1.97 christos 1424: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1425: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1426: return -1;
1427: if (nxtp)
1428: *nxtp = fh.ip6f_nxt;
1429: off += sizeof(struct ip6_frag);
1430: return off;
1431:
1432: case IPPROTO_AH:
1433: if (m->m_pkthdr.len < off + sizeof(ip6e))
1434: return -1;
1.97 christos 1435: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1436: if (nxtp)
1437: *nxtp = ip6e.ip6e_nxt;
1438: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1439: if (m->m_pkthdr.len < off)
1440: return -1;
1.18 itojun 1441: return off;
1442:
1443: case IPPROTO_HOPOPTS:
1444: case IPPROTO_ROUTING:
1445: case IPPROTO_DSTOPTS:
1446: if (m->m_pkthdr.len < off + sizeof(ip6e))
1447: return -1;
1.97 christos 1448: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1449: if (nxtp)
1450: *nxtp = ip6e.ip6e_nxt;
1451: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1452: if (m->m_pkthdr.len < off)
1453: return -1;
1.18 itojun 1454: return off;
1455:
1456: case IPPROTO_NONE:
1457: case IPPROTO_ESP:
1458: case IPPROTO_IPCOMP:
1459: /* give up */
1460: return -1;
1461:
1462: default:
1463: return -1;
1464: }
1465: }
1466:
1467: /*
1468: * get offset for the last header in the chain. m will be kept untainted.
1469: */
1470: int
1.107 christos 1471: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1472: {
1473: int newoff;
1474: int nxt;
1475:
1476: if (!nxtp) {
1477: nxt = -1;
1478: nxtp = &nxt;
1479: }
1.86 rpaulo 1480: for (;;) {
1.18 itojun 1481: newoff = ip6_nexthdr(m, off, proto, nxtp);
1482: if (newoff < 0)
1483: return off;
1484: else if (newoff < off)
1485: return -1; /* invalid */
1486: else if (newoff == off)
1487: return newoff;
1488:
1489: off = newoff;
1490: proto = *nxtp;
1.2 itojun 1491: }
1492: }
1493:
1.81 rpaulo 1494: struct m_tag *
1.107 christos 1495: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1496: {
1497: struct m_tag *mtag;
1498:
1499: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1500: if (!mtag) {
1501: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1502: M_NOWAIT);
1503: if (mtag) {
1504: m_tag_prepend(m, mtag);
1.124 cegger 1505: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1506: }
1507: }
1508: return mtag;
1509: }
1510:
1511: struct m_tag *
1.107 christos 1512: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1513: {
1514: struct m_tag *mtag;
1515:
1516: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1517: return mtag;
1518: }
1519:
1520: void
1.107 christos 1521: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1522: {
1523: struct m_tag *mtag;
1524:
1525: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1526: if (mtag)
1527: m_tag_delete(m, mtag);
1528: }
1529:
1.98 liamjfoy 1530: #ifdef GATEWAY
1531: /*
1532: * sysctl helper routine for net.inet.ip6.maxflows. Since
1533: * we could reduce this value, call ip6flow_reap();
1534: */
1535: static int
1.101 liamjfoy 1536: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1537: {
1.121 simonb 1538: int error;
1.98 liamjfoy 1539:
1.121 simonb 1540: error = sysctl_lookup(SYSCTLFN_CALL(rnode));
1541: if (error || newp == NULL)
1542: return (error);
1.98 liamjfoy 1543:
1.121 simonb 1544: mutex_enter(softnet_lock);
1.122 matt 1545: KERNEL_LOCK(1, NULL);
1.120 matt 1546:
1.121 simonb 1547: ip6flow_reap(0);
1.120 matt 1548:
1549: KERNEL_UNLOCK_ONE(NULL);
1.121 simonb 1550: mutex_exit(softnet_lock);
1.98 liamjfoy 1551:
1.121 simonb 1552: return (0);
1.98 liamjfoy 1553: }
1.99 liamjfoy 1554:
1555: static int
1556: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1557: {
1558: int error, tmp;
1559: struct sysctlnode node;
1560:
1561: node = *rnode;
1562: tmp = ip6_hashsize;
1563: node.sysctl_data = &tmp;
1564: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1565: if (error || newp == NULL)
1566: return (error);
1567:
1568: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1569: /*
1570: * Can only fail due to malloc()
1571: */
1.120 matt 1572: mutex_enter(softnet_lock);
1.122 matt 1573: KERNEL_LOCK(1, NULL);
1.120 matt 1574:
1575: error = ip6flow_invalidate_all(tmp);
1576:
1577: KERNEL_UNLOCK_ONE(NULL);
1578: mutex_exit(softnet_lock);
1.99 liamjfoy 1579: } else {
1580: /*
1581: * EINVAL if not a power of 2
1.121 simonb 1582: */
1.120 matt 1583: error = EINVAL;
1.99 liamjfoy 1584: }
1585:
1.120 matt 1586: return error;
1.99 liamjfoy 1587: }
1.98 liamjfoy 1588: #endif /* GATEWAY */
1589:
1.2 itojun 1590: /*
1591: * System control for IP6
1592: */
1593:
1.120 matt 1594: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1595: 0, 0, 0, 0,
1596: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1597: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1598: EMSGSIZE, EHOSTUNREACH, 0, 0,
1599: 0, 0, 0, 0,
1600: ENOPROTOOPT
1601: };
1602:
1.153 christos 1603: extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS);
1604:
1.116 thorpej 1605: static int
1606: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1607: {
1608:
1.119 thorpej 1609: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1610: }
1611:
1.128 pooka 1612: static void
1613: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1614: {
1.85 rpaulo 1615: #ifdef RFC2292
1616: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1617: #else
1618: #define IS2292(x, y) (y)
1619: #endif
1.26 itojun 1620:
1.73 atatat 1621: sysctl_createv(clog, 0, NULL, NULL,
1622: CTLFLAG_PERMANENT,
1.74 atatat 1623: CTLTYPE_NODE, "inet6",
1624: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1625: NULL, 0, NULL, 0,
1626: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1627: sysctl_createv(clog, 0, NULL, NULL,
1628: CTLFLAG_PERMANENT,
1.74 atatat 1629: CTLTYPE_NODE, "ip6",
1630: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1631: NULL, 0, NULL, 0,
1632: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1633:
1.73 atatat 1634: sysctl_createv(clog, 0, NULL, NULL,
1635: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1636: CTLTYPE_INT, "forwarding",
1637: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1638: NULL, 0, &ip6_forwarding, 0,
1639: CTL_NET, PF_INET6, IPPROTO_IPV6,
1640: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1641: sysctl_createv(clog, 0, NULL, NULL,
1642: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1643: CTLTYPE_INT, "redirect",
1644: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1645: NULL, 0, &ip6_sendredirects, 0,
1646: CTL_NET, PF_INET6, IPPROTO_IPV6,
1647: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1648: sysctl_createv(clog, 0, NULL, NULL,
1649: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1650: CTLTYPE_INT, "hlim",
1651: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1652: NULL, 0, &ip6_defhlim, 0,
1653: CTL_NET, PF_INET6, IPPROTO_IPV6,
1654: IPV6CTL_DEFHLIM, CTL_EOL);
1655: #ifdef notyet
1.73 atatat 1656: sysctl_createv(clog, 0, NULL, NULL,
1657: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1658: CTLTYPE_INT, "mtu", NULL,
1659: NULL, 0, &, 0,
1660: CTL_NET, PF_INET6, IPPROTO_IPV6,
1661: IPV6CTL_DEFMTU, CTL_EOL);
1662: #endif
1663: #ifdef __no_idea__
1.73 atatat 1664: sysctl_createv(clog, 0, NULL, NULL,
1665: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1666: CTLTYPE_INT, "forwsrcrt", NULL,
1667: NULL, 0, &?, 0,
1668: CTL_NET, PF_INET6, IPPROTO_IPV6,
1669: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1670: sysctl_createv(clog, 0, NULL, NULL,
1671: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1672: CTLTYPE_STRUCT, "mrtstats", NULL,
1673: NULL, 0, &?, sizeof(?),
1674: CTL_NET, PF_INET6, IPPROTO_IPV6,
1675: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1676: sysctl_createv(clog, 0, NULL, NULL,
1677: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1678: CTLTYPE_?, "mrtproto", NULL,
1679: NULL, 0, &?, sizeof(?),
1680: CTL_NET, PF_INET6, IPPROTO_IPV6,
1681: IPV6CTL_MRTPROTO, CTL_EOL);
1682: #endif
1.73 atatat 1683: sysctl_createv(clog, 0, NULL, NULL,
1684: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1685: CTLTYPE_INT, "maxfragpackets",
1686: SYSCTL_DESCR("Maximum number of fragments to buffer "
1687: "for reassembly"),
1.70 atatat 1688: NULL, 0, &ip6_maxfragpackets, 0,
1689: CTL_NET, PF_INET6, IPPROTO_IPV6,
1690: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1691: #ifdef __no_idea__
1.73 atatat 1692: sysctl_createv(clog, 0, NULL, NULL,
1693: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1694: CTLTYPE_INT, "sourcecheck", NULL,
1695: NULL, 0, &?, 0,
1696: CTL_NET, PF_INET6, IPPROTO_IPV6,
1697: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1698: sysctl_createv(clog, 0, NULL, NULL,
1699: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1700: CTLTYPE_INT, "sourcecheck_logint", NULL,
1701: NULL, 0, &?, 0,
1702: CTL_NET, PF_INET6, IPPROTO_IPV6,
1703: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1704: #endif
1.73 atatat 1705: sysctl_createv(clog, 0, NULL, NULL,
1706: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1707: CTLTYPE_INT, "accept_rtadv",
1708: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1709: NULL, 0, &ip6_accept_rtadv, 0,
1710: CTL_NET, PF_INET6, IPPROTO_IPV6,
1711: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1712: sysctl_createv(clog, 0, NULL, NULL,
1713: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1714: CTLTYPE_INT, "rtadv_maxroutes",
1715: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1716: NULL, 0, &ip6_rtadv_maxroutes, 0,
1717: CTL_NET, PF_INET6, IPPROTO_IPV6,
1718: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1719: sysctl_createv(clog, 0, NULL, NULL,
1720: CTLFLAG_PERMANENT,
1721: CTLTYPE_INT, "rtadv_numroutes",
1722: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1723: NULL, 0, &nd6_numroutes, 0,
1724: CTL_NET, PF_INET6, IPPROTO_IPV6,
1725: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1726: sysctl_createv(clog, 0, NULL, NULL,
1727: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1728: CTLTYPE_INT, "keepfaith",
1729: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1730: NULL, 0, &ip6_keepfaith, 0,
1731: CTL_NET, PF_INET6, IPPROTO_IPV6,
1732: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1733: sysctl_createv(clog, 0, NULL, NULL,
1734: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1735: CTLTYPE_INT, "log_interval",
1736: SYSCTL_DESCR("Minumum interval between logging "
1737: "unroutable packets"),
1.70 atatat 1738: NULL, 0, &ip6_log_interval, 0,
1739: CTL_NET, PF_INET6, IPPROTO_IPV6,
1740: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1741: sysctl_createv(clog, 0, NULL, NULL,
1742: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1743: CTLTYPE_INT, "hdrnestlimit",
1744: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1745: NULL, 0, &ip6_hdrnestlimit, 0,
1746: CTL_NET, PF_INET6, IPPROTO_IPV6,
1747: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1748: sysctl_createv(clog, 0, NULL, NULL,
1749: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1750: CTLTYPE_INT, "dad_count",
1751: SYSCTL_DESCR("Number of Duplicate Address Detection "
1752: "probes to send"),
1.70 atatat 1753: NULL, 0, &ip6_dad_count, 0,
1754: CTL_NET, PF_INET6, IPPROTO_IPV6,
1755: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1756: sysctl_createv(clog, 0, NULL, NULL,
1757: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1758: CTLTYPE_INT, "auto_flowlabel",
1759: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1760: NULL, 0, &ip6_auto_flowlabel, 0,
1761: CTL_NET, PF_INET6, IPPROTO_IPV6,
1762: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1763: sysctl_createv(clog, 0, NULL, NULL,
1764: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1765: CTLTYPE_INT, "defmcasthlim",
1766: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1767: NULL, 0, &ip6_defmcasthlim, 0,
1768: CTL_NET, PF_INET6, IPPROTO_IPV6,
1769: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.73 atatat 1770: sysctl_createv(clog, 0, NULL, NULL,
1771: CTLFLAG_PERMANENT,
1.74 atatat 1772: CTLTYPE_STRING, "kame_version",
1773: SYSCTL_DESCR("KAME Version"),
1.78 christos 1774: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1775: CTL_NET, PF_INET6, IPPROTO_IPV6,
1776: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1777: sysctl_createv(clog, 0, NULL, NULL,
1778: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1779: CTLTYPE_INT, "use_deprecated",
1780: SYSCTL_DESCR("Allow use of deprecated addresses as "
1781: "source addresses"),
1.70 atatat 1782: NULL, 0, &ip6_use_deprecated, 0,
1783: CTL_NET, PF_INET6, IPPROTO_IPV6,
1784: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1785: sysctl_createv(clog, 0, NULL, NULL,
1786: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1787: CTLTYPE_INT, "rr_prune", NULL,
1788: NULL, 0, &ip6_rr_prune, 0,
1789: CTL_NET, PF_INET6, IPPROTO_IPV6,
1790: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1791: sysctl_createv(clog, 0, NULL, NULL,
1792: CTLFLAG_PERMANENT
1.70 atatat 1793: #ifndef INET6_BINDV6ONLY
1.73 atatat 1794: |CTLFLAG_READWRITE,
1.70 atatat 1795: #endif
1.74 atatat 1796: CTLTYPE_INT, "v6only",
1797: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1798: "to PF_INET sockets"),
1.70 atatat 1799: NULL, 0, &ip6_v6only, 0,
1800: CTL_NET, PF_INET6, IPPROTO_IPV6,
1801: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1802: sysctl_createv(clog, 0, NULL, NULL,
1803: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1804: CTLTYPE_INT, "anonportmin",
1805: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1806: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1807: CTL_NET, PF_INET6, IPPROTO_IPV6,
1808: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1809: sysctl_createv(clog, 0, NULL, NULL,
1810: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1811: CTLTYPE_INT, "anonportmax",
1812: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1813: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1814: CTL_NET, PF_INET6, IPPROTO_IPV6,
1815: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1816: #ifndef IPNOPRIVPORTS
1.73 atatat 1817: sysctl_createv(clog, 0, NULL, NULL,
1818: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1819: CTLTYPE_INT, "lowportmin",
1820: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1821: "to assign"),
1.70 atatat 1822: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1823: CTL_NET, PF_INET6, IPPROTO_IPV6,
1824: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1825: sysctl_createv(clog, 0, NULL, NULL,
1826: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1827: CTLTYPE_INT, "lowportmax",
1828: SYSCTL_DESCR("Highest privileged ephemeral port number "
1829: "to assign"),
1.70 atatat 1830: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1831: CTL_NET, PF_INET6, IPPROTO_IPV6,
1832: IPV6CTL_LOWPORTMAX, CTL_EOL);
1833: #endif /* IPNOPRIVPORTS */
1.73 atatat 1834: sysctl_createv(clog, 0, NULL, NULL,
1835: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.153 christos 1836: CTLTYPE_INT, "auto_linklocal",
1837: SYSCTL_DESCR("Default value of per-interface flag for "
1838: "adding an IPv6 link-local address to "
1839: "interfaces when attached"),
1840: NULL, 0, &ip6_auto_linklocal, 0,
1841: CTL_NET, PF_INET6, IPPROTO_IPV6,
1842: IPV6CTL_AUTO_LINKLOCAL, CTL_EOL);
1843: sysctl_createv(clog, 0, NULL, NULL,
1844: CTLFLAG_PERMANENT|CTLFLAG_READONLY,
1845: CTLTYPE_STRUCT, "addctlpolicy",
1846: SYSCTL_DESCR("Return the current address control"
1847: " policy"),
1848: sysctl_net_inet6_addrctlpolicy, 0, NULL, 0,
1849: CTL_NET, PF_INET6, IPPROTO_IPV6,
1850: IPV6CTL_ADDRCTLPOLICY, CTL_EOL);
1851: sysctl_createv(clog, 0, NULL, NULL,
1852: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1853: CTLTYPE_INT, "use_tempaddr",
1854: SYSCTL_DESCR("Use temporary address"),
1855: NULL, 0, &ip6_use_tempaddr, 0,
1856: CTL_NET, PF_INET6, IPPROTO_IPV6,
1857: CTL_CREATE, CTL_EOL);
1858: sysctl_createv(clog, 0, NULL, NULL,
1859: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.150 roy 1860: CTLTYPE_INT, "prefer_tempaddr",
1861: SYSCTL_DESCR("Prefer temporary address as source "
1862: "address"),
1863: NULL, 0, &ip6_prefer_tempaddr, 0,
1864: CTL_NET, PF_INET6, IPPROTO_IPV6,
1865: CTL_CREATE, CTL_EOL);
1866: sysctl_createv(clog, 0, NULL, NULL,
1867: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1868: CTLTYPE_INT, "temppltime",
1869: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1870: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1871: CTL_NET, PF_INET6, IPPROTO_IPV6,
1872: CTL_CREATE, CTL_EOL);
1873: sysctl_createv(clog, 0, NULL, NULL,
1874: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1875: CTLTYPE_INT, "tempvltime",
1876: SYSCTL_DESCR("valid lifetime of a temporary address"),
1877: NULL, 0, &ip6_temp_valid_lifetime, 0,
1878: CTL_NET, PF_INET6, IPPROTO_IPV6,
1879: CTL_CREATE, CTL_EOL);
1880: sysctl_createv(clog, 0, NULL, NULL,
1881: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1882: CTLTYPE_INT, "maxfrags",
1883: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1884: NULL, 0, &ip6_maxfrags, 0,
1885: CTL_NET, PF_INET6, IPPROTO_IPV6,
1886: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1887: sysctl_createv(clog, 0, NULL, NULL,
1888: CTLFLAG_PERMANENT,
1889: CTLTYPE_STRUCT, "stats",
1890: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1891: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1892: CTL_NET, PF_INET6, IPPROTO_IPV6,
1893: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1894: sysctl_createv(clog, 0, NULL, NULL,
1895: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1896: CTLTYPE_INT, "use_defaultzone",
1897: SYSCTL_DESCR("Whether to use the default scope zones"),
1898: NULL, 0, &ip6_use_defzone, 0,
1899: CTL_NET, PF_INET6, IPPROTO_IPV6,
1900: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1901: sysctl_createv(clog, 0, NULL, NULL,
1902: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1903: CTLTYPE_INT, "mcast_pmtu",
1904: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1905: NULL, 0, &ip6_mcast_pmtu, 0,
1906: CTL_NET, PF_INET6, IPPROTO_IPV6,
1907: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1908: #ifdef GATEWAY
1909: sysctl_createv(clog, 0, NULL, NULL,
1910: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1911: CTLTYPE_INT, "maxflows",
1912: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.101 liamjfoy 1913: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1914: CTL_NET, PF_INET6, IPPROTO_IPV6,
1915: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1916: sysctl_createv(clog, 0, NULL, NULL,
1917: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1918: CTLTYPE_INT, "hashsize",
1919: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1920: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1921: CTL_NET, PF_INET6, IPPROTO_IPV6,
1922: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1923: #endif
1.138 christos 1924: /* anonportalgo RFC6056 subtree */
1.140 christos 1925: const struct sysctlnode *portalgo_node;
1926: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1927: CTLFLAG_PERMANENT,
1928: CTLTYPE_NODE, "anonportalgo",
1929: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1930: NULL, 0, NULL, 0,
1931: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1932: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1933: CTLFLAG_PERMANENT,
1934: CTLTYPE_STRING, "available",
1935: SYSCTL_DESCR("available algorithms"),
1.140 christos 1936: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1937: CTL_CREATE, CTL_EOL);
1.140 christos 1938: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1939: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1940: CTLTYPE_STRING, "selected",
1941: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1942: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1943: CTL_CREATE, CTL_EOL);
1.141 christos 1944: sysctl_createv(clog, 0, &portalgo_node, NULL,
1945: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1946: CTLTYPE_STRUCT, "reserve",
1947: SYSCTL_DESCR("bitmap of reserved ports"),
1948: sysctl_portalgo_reserve6, 0, NULL, 0,
1949: CTL_CREATE, CTL_EOL);
1.139 christos 1950: sysctl_createv(clog, 0, NULL, NULL,
1951: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1952: CTLTYPE_INT, "neighborgcthresh",
1953: SYSCTL_DESCR("Maximum number of entries in neighbor"
1954: " cache"),
1955: NULL, 1, &ip6_neighborgcthresh, 0,
1956: CTL_NET, PF_INET6, IPPROTO_IPV6,
1957: CTL_CREATE, CTL_EOL);
1958: sysctl_createv(clog, 0, NULL, NULL,
1959: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1960: CTLTYPE_INT, "maxifprefixes",
1961: SYSCTL_DESCR("Maximum number of prefixes created by"
1962: " route advertisement per interface"),
1963: NULL, 1, &ip6_maxifprefixes, 0,
1964: CTL_NET, PF_INET6, IPPROTO_IPV6,
1965: CTL_CREATE, CTL_EOL);
1966: sysctl_createv(clog, 0, NULL, NULL,
1967: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1968: CTLTYPE_INT, "maxifdefrouters",
1969: SYSCTL_DESCR("Maximum number of default routers created"
1970: " by route advertisement per interface"),
1971: NULL, 1, &ip6_maxifdefrouters, 0,
1972: CTL_NET, PF_INET6, IPPROTO_IPV6,
1973: CTL_CREATE, CTL_EOL);
1974: sysctl_createv(clog, 0, NULL, NULL,
1975: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1976: CTLTYPE_INT, "maxdynroutes",
1977: SYSCTL_DESCR("Maximum number of routes created via"
1978: " redirect"),
1979: NULL, 1, &ip6_maxdynroutes, 0,
1980: CTL_NET, PF_INET6, IPPROTO_IPV6,
1981: CTL_CREATE, CTL_EOL);
1.2 itojun 1982: }
1.116 thorpej 1983:
1984: void
1985: ip6_statinc(u_int stat)
1986: {
1987:
1988: KASSERT(stat < IP6_NSTATS);
1989: IP6_STATINC(stat);
1990: }
CVSweb <webmaster@jp.NetBSD.org>