Annotation of src/sys/netinet6/ip6_input.c, Revision 1.161
1.161 ! ozaki-r 1: /* $NetBSD: ip6_input.c,v 1.160 2016/06/10 13:31:44 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>
1.161 ! ozaki-r 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.160 2016/06/10 13:31:44 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];
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) {
1.160 ozaki-r 220: struct psref psref;
221: struct ifnet *rcvif = m_get_rcvif_psref(m, &psref);
1.148 rmind 222:
1.160 ozaki-r 223: if (rcvif == NULL) {
224: m_freem(m);
225: continue;
226: }
1.148 rmind 227: /*
228: * Drop the packet if IPv6 is disabled on the interface.
229: */
1.160 ozaki-r 230: if ((ND_IFINFO(rcvif)->flags & ND6_IFF_IFDISABLED)) {
231: m_put_rcvif_psref(rcvif, &psref);
1.83 rpaulo 232: m_freem(m);
1.148 rmind 233: continue;
1.83 rpaulo 234: }
1.160 ozaki-r 235: ip6_input(m, rcvif);
236: m_put_rcvif_psref(rcvif, &psref);
1.2 itojun 237: }
1.118 ad 238: mutex_exit(softnet_lock);
1.2 itojun 239: }
240:
1.103 dyoung 241: extern struct route ip6_forward_rt;
1.2 itojun 242:
243: void
1.160 ozaki-r 244: ip6_input(struct mbuf *m, struct ifnet *rcvif)
1.2 itojun 245: {
1.9 itojun 246: struct ip6_hdr *ip6;
1.105 dyoung 247: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 248: u_int32_t plen;
1.5 itojun 249: u_int32_t rtalert = ~0;
1.104 yamt 250: int nxt, ours = 0, rh_present = 0;
1.9 itojun 251: struct ifnet *deliverifp = NULL;
1.64 itojun 252: int srcrt = 0;
1.105 dyoung 253: const struct rtentry *rt;
254: union {
255: struct sockaddr dst;
256: struct sockaddr_in6 dst6;
257: } u;
1.2 itojun 258:
259: /*
1.81 rpaulo 260: * make sure we don't have onion peering information into m_tag.
261: */
262: ip6_delaux(m);
263:
264: /*
1.44 itojun 265: * mbuf statistics
1.2 itojun 266: */
267: if (m->m_flags & M_EXT) {
268: if (m->m_next)
1.116 thorpej 269: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 270: else
1.116 thorpej 271: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 272: } else {
1.115 thorpej 273: #define M2MMAX 32
1.2 itojun 274: if (m->m_next) {
1.159 ozaki-r 275: if (m->m_flags & M_LOOP)
1.116 thorpej 276: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.159 ozaki-r 277: else if (rcvif->if_index < M2MMAX)
278: IP6_STATINC(IP6_STAT_M2M + rcvif->if_index);
279: else
1.116 thorpej 280: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 281: } else
1.116 thorpej 282: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 283: #undef M2MMAX
1.2 itojun 284: }
285:
1.159 ozaki-r 286: in6_ifstat_inc(rcvif, ifs6_in_receive);
1.116 thorpej 287: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 288:
1.57 thorpej 289: /*
290: * If the IPv6 header is not aligned, slurp it up into a new
291: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 292: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 293: * IPv6 header is in the first mbuf of the chain.
294: */
1.97 christos 295: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 296: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
297: (max_linkhdr + 3) & ~3)) == NULL) {
298: /* XXXJRT new stat, please */
1.116 thorpej 299: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 300: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.57 thorpej 301: return;
302: }
303: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
1.55 itojun 304: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 305: IP6_STATINC(IP6_STAT_TOOSMALL);
1.159 ozaki-r 306: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.9 itojun 307: return;
308: }
1.2 itojun 309: }
310:
311: ip6 = mtod(m, struct ip6_hdr *);
312:
313: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 314: IP6_STATINC(IP6_STAT_BADVERS);
1.159 ozaki-r 315: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 316: goto bad;
317: }
1.15 darrenr 318:
1.98 liamjfoy 319: /*
320: * Assume that we can create a fast-forward IP flow entry
321: * based on this packet.
322: */
323: m->m_flags |= M_CANFASTFWD;
324:
1.15 darrenr 325: /*
326: * Run through list of hooks for input packets. If there are any
327: * filters which require that additional packets in the flow are
328: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
329: * Note that filters must _never_ set this flag, as another filter
330: * in the list may have previously cleared it.
331: */
1.39 itojun 332: /*
333: * let ipfilter look at packet on the wire,
334: * not the decapsulated packet.
335: */
1.142 christos 336: #if defined(IPSEC)
1.146 christos 337: if (!ipsec_used || !ipsec_indone(m))
1.39 itojun 338: #else
339: if (1)
340: #endif
341: {
1.64 itojun 342: struct in6_addr odst;
343:
344: odst = ip6->ip6_dst;
1.159 ozaki-r 345: if (pfil_run_hooks(inet6_pfil_hook, &m, rcvif, PFIL_IN) != 0)
1.39 itojun 346: return;
347: if (m == NULL)
348: return;
349: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 350: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 351: }
1.15 darrenr 352:
1.116 thorpej 353: IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt);
1.2 itojun 354:
1.30 thorpej 355: #ifdef ALTQ
356: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
357: /* packet is dropped by traffic conditioner */
358: return;
1.9 itojun 359: }
360: #endif
361:
1.2 itojun 362: /*
1.44 itojun 363: * Check against address spoofing/corruption.
1.2 itojun 364: */
365: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
366: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 367: /*
368: * XXX: "badscope" is not very suitable for a multicast source.
369: */
1.116 thorpej 370: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 371: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.2 itojun 372: goto bad;
373: }
1.13 itojun 374: /*
1.44 itojun 375: * The following check is not documented in specs. A malicious
376: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
377: * and bypass security checks (act as if it was from 127.0.0.1 by using
378: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 379: *
1.44 itojun 380: * This check chokes if we are in an SIIT cloud. As none of BSDs
381: * support IPv4-less kernel compilation, we cannot support SIIT
382: * environment at all. So, it makes more sense for us to reject any
383: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 384: * partial support for SIIT environment.
1.13 itojun 385: */
386: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
387: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 388: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 389: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 390: goto bad;
391: }
1.17 itojun 392: #if 0
1.13 itojun 393: /*
1.17 itojun 394: * Reject packets with IPv4 compatible addresses (auto tunnel).
395: *
396: * The code forbids auto tunnel relay case in RFC1933 (the check is
397: * stronger than RFC1933). We may want to re-enable it if mech-xx
398: * is revised to forbid relaying case.
1.13 itojun 399: */
400: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
401: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
1.116 thorpej 402: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 403: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.13 itojun 404: goto bad;
405: }
406: #endif
1.35 itojun 407:
1.2 itojun 408: /*
1.82 yamt 409: * Disambiguate address scope zones (if there is ambiguity).
410: * We first make sure that the original source or destination address
411: * is not in our internal form for scoped addresses. Such addresses
412: * are not necessarily invalid spec-wise, but we cannot accept them due
413: * to the usage conflict.
414: * in6_setscope() then also checks and rejects the cases where src or
415: * dst are the loopback address and the receiving interface
416: * is not loopback.
417: */
1.88 bouyer 418: if (__predict_false(
419: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
420: goto bad;
421: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 422: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 423: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 424: goto bad;
425: }
1.159 ozaki-r 426: if (in6_setscope(&ip6->ip6_src, rcvif, NULL) ||
427: in6_setscope(&ip6->ip6_dst, rcvif, NULL)) {
1.116 thorpej 428: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 429: goto bad;
430: }
431:
432: /*
1.2 itojun 433: * Multicast check
434: */
435: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
436: struct in6_multi *in6m = 0;
1.9 itojun 437:
1.159 ozaki-r 438: in6_ifstat_inc(rcvif, ifs6_in_mcast);
1.2 itojun 439: /*
440: * See if we belong to the destination multicast group on the
441: * arrival interface.
442: */
1.159 ozaki-r 443: IN6_LOOKUP_MULTI(ip6->ip6_dst, rcvif, in6m);
1.2 itojun 444: if (in6m)
445: ours = 1;
446: else if (!ip6_mrouter) {
1.116 thorpej 447: uint64_t *ip6s = IP6_STAT_GETREF();
448: ip6s[IP6_STAT_NOTMEMBER]++;
449: ip6s[IP6_STAT_CANTFORWARD]++;
450: IP6_STAT_PUTREF();
1.159 ozaki-r 451: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.2 itojun 452: goto bad;
453: }
1.159 ozaki-r 454: deliverifp = rcvif;
1.2 itojun 455: goto hbhcheck;
456: }
457:
1.105 dyoung 458: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
459:
1.2 itojun 460: /*
461: * Unicast check
462: */
1.105 dyoung 463: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
464: if (hit)
1.116 thorpej 465: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 466: else
1.116 thorpej 467: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 468:
1.109 dyoung 469: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 470:
471: /*
472: * Accept the packet if the forwarding interface to the destination
473: * according to the routing table is the loopback interface,
474: * unless the associated route has a gateway.
475: * Note that this approach causes to accept a packet if there is a
476: * route to the loopback interface for the destination of the packet.
477: * But we think it's even useful in some situations, e.g. when using
478: * a special daemon which wants to intercept the packet.
479: */
1.105 dyoung 480: if (rt != NULL &&
481: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.2 itojun 482: #if 0
483: /*
484: * The check below is redundant since the comparison of
485: * the destination and the key of the rtentry has
486: * already done through looking up the routing table.
487: */
1.109 dyoung 488: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 489: #endif
1.105 dyoung 490: rt->rt_ifp->if_type == IFT_LOOP) {
491: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 492: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
493: m->m_flags |= M_ANYCAST6;
1.24 itojun 494: /*
495: * packets to a tentative, duplicated, or somehow invalid
496: * address must not be accepted.
497: */
1.2 itojun 498: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 499: /* this address is ready */
1.2 itojun 500: ours = 1;
1.9 itojun 501: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 502: goto hbhcheck;
503: } else {
1.24 itojun 504: /* address is not ready, so discard the packet. */
1.157 ozaki-r 505: nd6log(LOG_INFO, "packet to an unready address %s->%s\n",
1.24 itojun 506: ip6_sprintf(&ip6->ip6_src),
1.157 ozaki-r 507: ip6_sprintf(&ip6->ip6_dst));
1.24 itojun 508:
509: goto bad;
1.2 itojun 510: }
511: }
512:
513: /*
1.55 itojun 514: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 515: */
516: #if defined(NFAITH) && 0 < NFAITH
517: if (ip6_keepfaith) {
1.105 dyoung 518: if (rt != NULL && rt->rt_ifp != NULL &&
519: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 520: /* XXX do we need more sanity checks? */
521: ours = 1;
1.105 dyoung 522: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 523: goto hbhcheck;
524: }
525: }
526: #endif
527:
528: #if 0
529: {
530: /*
531: * Last resort: check in6_ifaddr for incoming interface.
532: * The code is here until I update the "goto ours hack" code above
533: * working right.
534: */
535: struct ifaddr *ifa;
1.159 ozaki-r 536: IFADDR_FOREACH(ifa, rcvif) {
1.9 itojun 537: if (ifa->ifa_addr->sa_family != AF_INET6)
538: continue;
539: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
540: ours = 1;
541: deliverifp = ifa->ifa_ifp;
1.2 itojun 542: goto hbhcheck;
543: }
544: }
1.9 itojun 545: }
1.2 itojun 546: #endif
547:
548: /*
549: * Now there is no reason to process the packet if it's not our own
550: * and we're not a router.
551: */
552: if (!ip6_forwarding) {
1.116 thorpej 553: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.159 ozaki-r 554: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.2 itojun 555: goto bad;
556: }
557:
558: hbhcheck:
559: /*
1.81 rpaulo 560: * record address information into m_tag, if we don't have one yet.
561: * note that we are unable to record it, if the address is not listed
562: * as our interface address (e.g. multicast addresses, addresses
563: * within FAITH prefixes and such).
564: */
1.111 dyoung 565: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 566: struct in6_ifaddr *ia6;
567:
568: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.111 dyoung 569: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
570: /*
571: * XXX maybe we should drop the packet here,
572: * as we could not provide enough information
573: * to the upper layers.
574: */
1.81 rpaulo 575: }
576: }
577:
578: /*
1.2 itojun 579: * Process Hop-by-Hop options header if it's contained.
580: * m may be modified in ip6_hopopts_input().
581: * If a JumboPayload option is included, plen will also be modified.
582: */
583: plen = (u_int32_t)ntohs(ip6->ip6_plen);
584: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 585: struct ip6_hbh *hbh;
586:
587: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
588: #if 0 /*touches NULL pointer*/
1.159 ozaki-r 589: in6_ifstat_inc(rcvif, ifs6_in_discard);
1.9 itojun 590: #endif
1.2 itojun 591: return; /* m have already been freed */
1.9 itojun 592: }
1.22 itojun 593:
1.2 itojun 594: /* adjust pointer */
595: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 596:
597: /*
1.49 itojun 598: * if the payload length field is 0 and the next header field
1.22 itojun 599: * indicates Hop-by-Hop Options header, then a Jumbo Payload
600: * option MUST be included.
601: */
602: if (ip6->ip6_plen == 0 && plen == 0) {
603: /*
604: * Note that if a valid jumbo payload option is
1.83 rpaulo 605: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 606: * (non-zero) payload length to the variable plen.
1.22 itojun 607: */
1.116 thorpej 608: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.159 ozaki-r 609: in6_ifstat_inc(rcvif, ifs6_in_discard);
610: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.22 itojun 611: icmp6_error(m, ICMP6_PARAM_PROB,
612: ICMP6_PARAMPROB_HEADER,
1.97 christos 613: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 614: return;
615: }
1.9 itojun 616: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
617: sizeof(struct ip6_hbh));
618: if (hbh == NULL) {
1.116 thorpej 619: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 620: return;
621: }
1.57 thorpej 622: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 623: nxt = hbh->ip6h_nxt;
1.2 itojun 624:
625: /*
626: * accept the packet if a router alert option is included
627: * and we act as an IPv6 router.
628: */
1.5 itojun 629: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 630: ours = 1;
631: } else
632: nxt = ip6->ip6_nxt;
633:
634: /*
635: * Check that the amount of data in the buffers
636: * is as at least much as the IPv6 header would have us expect.
637: * Trim mbufs if longer than we expect.
638: * Drop packet if shorter than we expect.
639: */
640: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 641: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 642: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.2 itojun 643: goto bad;
644: }
645: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
646: if (m->m_len == m->m_pkthdr.len) {
647: m->m_len = sizeof(struct ip6_hdr) + plen;
648: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
649: } else
650: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
651: }
652:
653: /*
654: * Forward if desirable.
655: */
656: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
657: /*
658: * If we are acting as a multicast router, all
659: * incoming multicast packets are passed to the
660: * kernel-level multicast forwarding function.
661: * The packet is returned (relatively) intact; if
662: * ip6_mforward() returns a non-zero value, the packet
663: * must be discarded, else it may be accepted below.
664: */
1.159 ozaki-r 665: if (ip6_mrouter && ip6_mforward(ip6, rcvif, m)) {
1.116 thorpej 666: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.2 itojun 667: m_freem(m);
668: return;
669: }
670: if (!ours) {
671: m_freem(m);
672: return;
673: }
1.22 itojun 674: } else if (!ours) {
1.64 itojun 675: ip6_forward(m, srcrt);
1.2 itojun 676: return;
1.56 itojun 677: }
1.25 itojun 678:
679: ip6 = mtod(m, struct ip6_hdr *);
680:
681: /*
682: * Malicious party may be able to use IPv4 mapped addr to confuse
683: * tcp/udp stack and bypass security checks (act as if it was from
684: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
685: *
686: * For SIIT end node behavior, you may want to disable the check.
687: * However, you will become vulnerable to attacks using IPv4 mapped
688: * source.
689: */
690: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
691: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 692: IP6_STATINC(IP6_STAT_BADSCOPE);
1.159 ozaki-r 693: in6_ifstat_inc(rcvif, ifs6_in_addrerr);
1.25 itojun 694: goto bad;
695: }
1.2 itojun 696:
697: /*
698: * Tell launch routine the next header
699: */
1.12 itojun 700: #ifdef IFA_STATS
1.28 itojun 701: if (deliverifp != NULL) {
1.9 itojun 702: struct in6_ifaddr *ia6;
703: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
704: if (ia6)
705: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
706: }
707: #endif
1.116 thorpej 708: IP6_STATINC(IP6_STAT_DELIVERED);
1.9 itojun 709: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 710: nest = 0;
1.40 itojun 711:
1.104 yamt 712: rh_present = 0;
1.2 itojun 713: while (nxt != IPPROTO_DONE) {
714: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.116 thorpej 715: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.159 ozaki-r 716: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.2 itojun 717: goto bad;
718: }
1.8 itojun 719:
720: /*
721: * protection against faulty packet - there should be
722: * more sanity checks in header chain processing.
723: */
724: if (m->m_pkthdr.len < off) {
1.116 thorpej 725: IP6_STATINC(IP6_STAT_TOOSHORT);
1.159 ozaki-r 726: in6_ifstat_inc(rcvif, ifs6_in_truncated);
1.8 itojun 727: goto bad;
728: }
729:
1.104 yamt 730: if (nxt == IPPROTO_ROUTING) {
731: if (rh_present++) {
1.159 ozaki-r 732: in6_ifstat_inc(rcvif, ifs6_in_hdrerr);
1.116 thorpej 733: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 734: goto bad;
735: }
736: }
737:
1.142 christos 738: #ifdef IPSEC
1.146 christos 739: if (ipsec_used) {
1.94 degroote 740: /*
1.146 christos 741: * enforce IPsec policy checking if we are seeing last
742: * header. note that we do not visit this with
743: * protocols with pcb layer code - like udp/tcp/raw ip.
1.94 degroote 744: */
1.146 christos 745: if ((inet6sw[ip_protox[nxt]].pr_flags
746: & PR_LASTHDR) != 0) {
1.151 ozaki-r 747: int error = ipsec6_input(m);
1.146 christos 748: if (error)
749: goto bad;
750: }
1.94 degroote 751: }
1.142 christos 752: #endif /* IPSEC */
1.94 degroote 753:
1.2 itojun 754: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
755: }
756: return;
757: bad:
758: m_freem(m);
759: }
760:
761: /*
1.81 rpaulo 762: * set/grab in6_ifaddr correspond to IPv6 destination address.
763: */
764: static struct m_tag *
1.112 dyoung 765: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 766: {
767: struct m_tag *mtag;
1.144 christos 768: struct ip6aux *ip6a;
1.81 rpaulo 769:
770: mtag = ip6_addaux(m);
1.144 christos 771: if (mtag == NULL)
772: return NULL;
1.112 dyoung 773:
1.144 christos 774: ip6a = (struct ip6aux *)(mtag + 1);
775: if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) {
776: IP6_STATINC(IP6_STAT_BADSCOPE);
777: return NULL;
1.112 dyoung 778: }
1.144 christos 779:
780: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
781: ip6a->ip6a_flags = ia->ia6_flags;
782: return mtag;
1.81 rpaulo 783: }
784:
1.112 dyoung 785: const struct ip6aux *
1.107 christos 786: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 787: {
788: struct m_tag *mtag;
789:
790: mtag = ip6_findaux(m);
1.112 dyoung 791: if (mtag != NULL)
792: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 793: else
794: return NULL;
795: }
796:
797: /*
1.2 itojun 798: * Hop-by-Hop options header processing. If a valid jumbo payload option is
799: * included, the real payload length will be stored in plenp.
1.107 christos 800: *
801: * rtalertp - XXX: should be stored more smart way
1.2 itojun 802: */
1.136 drochner 803: int
1.107 christos 804: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
805: struct mbuf **mp, int *offp)
1.2 itojun 806: {
1.35 itojun 807: struct mbuf *m = *mp;
1.2 itojun 808: int off = *offp, hbhlen;
809: struct ip6_hbh *hbh;
810:
811: /* validation of the length of the header */
1.9 itojun 812: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
813: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
814: if (hbh == NULL) {
1.116 thorpej 815: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 816: return -1;
817: }
818: hbhlen = (hbh->ip6h_len + 1) << 3;
819: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
820: hbhlen);
821: if (hbh == NULL) {
1.116 thorpej 822: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 823: return -1;
824: }
1.57 thorpej 825: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 826: off += hbhlen;
827: hbhlen -= sizeof(struct ip6_hbh);
828:
829: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
830: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 831: return (-1);
1.2 itojun 832:
833: *offp = off;
834: *mp = m;
1.58 itojun 835: return (0);
1.2 itojun 836: }
837:
838: /*
839: * Search header for all Hop-by-hop options and process each option.
840: * This function is separate from ip6_hopopts_input() in order to
841: * handle a case where the sending node itself process its hop-by-hop
842: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 843: *
844: * The function assumes that hbh header is located right after the IPv6 header
845: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
846: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 847: */
1.136 drochner 848: static int
1.107 christos 849: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
850: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 851: {
852: struct ip6_hdr *ip6;
853: int optlen = 0;
854: u_int8_t *opt = opthead;
855: u_int16_t rtalert_val;
1.22 itojun 856: u_int32_t jumboplen;
1.55 itojun 857: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 858:
859: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 860: switch (*opt) {
861: case IP6OPT_PAD1:
862: optlen = 1;
863: break;
864: case IP6OPT_PADN:
865: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 866: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 867: goto bad;
868: }
869: optlen = *(opt + 1) + 2;
870: break;
871: case IP6OPT_RTALERT:
872: /* XXX may need check for alignment */
873: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 874: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 875: goto bad;
876: }
877: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 878: /* XXX stat */
879: icmp6_error(m, ICMP6_PARAM_PROB,
880: ICMP6_PARAMPROB_HEADER,
881: erroff + opt + 1 - opthead);
882: return (-1);
1.35 itojun 883: }
884: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 885: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 886: *rtalertp = ntohs(rtalert_val);
887: break;
888: case IP6OPT_JUMBO:
1.22 itojun 889: /* XXX may need check for alignment */
890: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 891: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 892: goto bad;
893: }
1.35 itojun 894: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 895: /* XXX stat */
896: icmp6_error(m, ICMP6_PARAM_PROB,
897: ICMP6_PARAMPROB_HEADER,
898: erroff + opt + 1 - opthead);
899: return (-1);
1.35 itojun 900: }
1.22 itojun 901: optlen = IP6OPT_JUMBO_LEN;
902:
903: /*
904: * IPv6 packets that have non 0 payload length
1.35 itojun 905: * must not contain a jumbo payload option.
1.22 itojun 906: */
907: ip6 = mtod(m, struct ip6_hdr *);
908: if (ip6->ip6_plen) {
1.116 thorpej 909: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 910: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 911: ICMP6_PARAMPROB_HEADER,
912: erroff + opt - opthead);
913: return (-1);
1.22 itojun 914: }
1.2 itojun 915:
1.22 itojun 916: /*
917: * We may see jumbolen in unaligned location, so
918: * we'd need to perform bcopy().
919: */
1.126 tsutsui 920: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 921: jumboplen = (u_int32_t)htonl(jumboplen);
922:
923: #if 1
924: /*
925: * if there are multiple jumbo payload options,
926: * *plenp will be non-zero and the packet will be
927: * rejected.
928: * the behavior may need some debate in ipngwg -
929: * multiple options does not make sense, however,
930: * there's no explicit mention in specification.
931: */
932: if (*plenp != 0) {
1.116 thorpej 933: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 934: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 935: ICMP6_PARAMPROB_HEADER,
936: erroff + opt + 2 - opthead);
937: return (-1);
1.22 itojun 938: }
1.8 itojun 939: #endif
1.2 itojun 940:
1.22 itojun 941: /*
942: * jumbo payload length must be larger than 65535.
943: */
944: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 945: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 946: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 947: ICMP6_PARAMPROB_HEADER,
948: erroff + opt + 2 - opthead);
949: return (-1);
1.22 itojun 950: }
951: *plenp = jumboplen;
952:
953: break;
1.35 itojun 954: default: /* unknown option */
955: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 956: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 957: goto bad;
958: }
1.55 itojun 959: optlen = ip6_unknown_opt(opt, m,
960: erroff + opt - opthead);
961: if (optlen == -1)
962: return (-1);
1.35 itojun 963: optlen += 2;
964: break;
1.2 itojun 965: }
966: }
967:
1.55 itojun 968: return (0);
1.2 itojun 969:
970: bad:
971: m_freem(m);
1.55 itojun 972: return (-1);
1.2 itojun 973: }
974:
975: /*
976: * Unknown option processing.
977: * The third argument `off' is the offset from the IPv6 header to the option,
978: * which is necessary if the IPv6 header the and option header and IPv6 header
979: * is not continuous in order to return an ICMPv6 error.
980: */
981: int
1.107 christos 982: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 983: {
984: struct ip6_hdr *ip6;
985:
1.35 itojun 986: switch (IP6OPT_TYPE(*optp)) {
987: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 988: return ((int)*(optp + 1));
1.35 itojun 989: case IP6OPT_TYPE_DISCARD: /* silently discard */
990: m_freem(m);
1.58 itojun 991: return (-1);
1.35 itojun 992: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 993: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 994: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 995: return (-1);
1.35 itojun 996: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 997: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 998: ip6 = mtod(m, struct ip6_hdr *);
999: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1000: (m->m_flags & (M_BCAST|M_MCAST)))
1001: m_freem(m);
1002: else
1003: icmp6_error(m, ICMP6_PARAM_PROB,
1004: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1005: return (-1);
1.2 itojun 1006: }
1007:
1008: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1009: return (-1);
1.2 itojun 1010: }
1011:
1012: /*
1.9 itojun 1013: * Create the "control" list for this pcb.
1014: *
1015: * The routine will be called from upper layer handlers like tcp6_input().
1016: * Thus the routine assumes that the caller (tcp6_input) have already
1017: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1018: * very first mbuf on the mbuf chain.
1019: * We may want to add some infinite loop prevention or sanity checks for safety.
1020: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1021: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1022: */
1023: void
1.107 christos 1024: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1025: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1026: {
1.85 rpaulo 1027: #ifdef RFC2292
1028: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1029: #else
1030: #define IS2292(x, y) (y)
1031: #endif
1032:
1.123 christos 1033: if (in6p->in6p_socket->so_options & SO_TIMESTAMP
1034: #ifdef SO_OTIMESTAMP
1035: || in6p->in6p_socket->so_options & SO_OTIMESTAMP
1036: #endif
1037: ) {
1.2 itojun 1038: struct timeval tv;
1039:
1040: microtime(&tv);
1.123 christos 1041: #ifdef SO_OTIMESTAMP
1042: if (in6p->in6p_socket->so_options & SO_OTIMESTAMP) {
1043: struct timeval50 tv50;
1044: timeval_to_timeval50(&tv, &tv50);
1045: *mp = sbcreatecontrol((void *) &tv50, sizeof(tv50),
1046: SCM_OTIMESTAMP, SOL_SOCKET);
1047: } else
1048: #endif
1.97 christos 1049: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1050: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1051: if (*mp)
1052: mp = &(*mp)->m_next;
1053: }
1.87 rpaulo 1054:
1055: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1056: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1057: return;
1058:
1.2 itojun 1059: /* RFC 2292 sec. 5 */
1.35 itojun 1060: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1061: struct in6_pktinfo pi6;
1.85 rpaulo 1062:
1.126 tsutsui 1063: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1064: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.160 ozaki-r 1065: pi6.ipi6_ifindex = m->m_pkthdr.rcvif_index;
1.97 christos 1066: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1067: sizeof(struct in6_pktinfo),
1068: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1069: if (*mp)
1070: mp = &(*mp)->m_next;
1071: }
1.85 rpaulo 1072:
1.2 itojun 1073: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1074: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1075:
1.97 christos 1076: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1077: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1078: if (*mp)
1079: mp = &(*mp)->m_next;
1080: }
1081:
1082: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1083: u_int32_t flowinfo;
1084: int tclass;
1085:
1086: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1087: flowinfo >>= 20;
1088:
1089: tclass = flowinfo & 0xff;
1.97 christos 1090: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1091: IPV6_TCLASS, IPPROTO_IPV6);
1092:
1.2 itojun 1093: if (*mp)
1094: mp = &(*mp)->m_next;
1095: }
1096:
1097: /*
1.75 itojun 1098: * IPV6_HOPOPTS socket option. Recall that we required super-user
1099: * privilege for the option (see ip6_ctloutput), but it might be too
1100: * strict, since there might be some hop-by-hop options which can be
1101: * returned to normal user.
1.85 rpaulo 1102: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1103: */
1.75 itojun 1104: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1105: /*
1106: * Check if a hop-by-hop options header is contatined in the
1107: * received packet, and if so, store the options as ancillary
1108: * data. Note that a hop-by-hop options header must be
1109: * just after the IPv6 header, which fact is assured through
1110: * the IPv6 input processing.
1111: */
1.78 christos 1112: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1113: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1114: struct ip6_hbh *hbh;
1115: int hbhlen;
1.62 itojun 1116: struct mbuf *ext;
1.9 itojun 1117:
1.62 itojun 1118: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1119: xip6->ip6_nxt);
1.62 itojun 1120: if (ext == NULL) {
1.116 thorpej 1121: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1122: return;
1123: }
1.62 itojun 1124: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1125: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1126: if (hbhlen != ext->m_len) {
1127: m_freem(ext);
1.116 thorpej 1128: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1129: return;
1130: }
1.2 itojun 1131:
1132: /*
1133: * XXX: We copy whole the header even if a jumbo
1134: * payload option is included, which option is to
1135: * be removed before returning in the RFC 2292.
1.85 rpaulo 1136: * Note: this constraint is removed in RFC3542.
1.2 itojun 1137: */
1.97 christos 1138: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1139: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1140: IPPROTO_IPV6);
1.2 itojun 1141: if (*mp)
1142: mp = &(*mp)->m_next;
1.62 itojun 1143: m_freem(ext);
1.2 itojun 1144: }
1145: }
1146:
1147: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1148: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1149: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1150: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1151:
1152: /*
1153: * Search for destination options headers or routing
1154: * header(s) through the header chain, and stores each
1155: * header as ancillary data.
1156: * Note that the order of the headers remains in
1157: * the chain of ancillary data.
1158: */
1.86 rpaulo 1159: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1160: struct ip6_ext *ip6e = NULL;
1.9 itojun 1161: int elen;
1.62 itojun 1162: struct mbuf *ext = NULL;
1.9 itojun 1163:
1.62 itojun 1164: /*
1165: * if it is not an extension header, don't try to
1166: * pull it from the chain.
1167: */
1168: switch (nxt) {
1169: case IPPROTO_DSTOPTS:
1170: case IPPROTO_ROUTING:
1171: case IPPROTO_HOPOPTS:
1172: case IPPROTO_AH: /* is it possible? */
1173: break;
1174: default:
1175: goto loopend;
1176: }
1177:
1178: ext = ip6_pullexthdr(m, off, nxt);
1179: if (ext == NULL) {
1.116 thorpej 1180: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1181: return;
1182: }
1.62 itojun 1183: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1184: if (nxt == IPPROTO_AH)
1185: elen = (ip6e->ip6e_len + 2) << 2;
1186: else
1187: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1188: if (elen != ext->m_len) {
1189: m_freem(ext);
1.116 thorpej 1190: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1191: return;
1192: }
1.57 thorpej 1193: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1194:
1.35 itojun 1195: switch (nxt) {
1.62 itojun 1196: case IPPROTO_DSTOPTS:
1.127 martin 1197: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1198: break;
1199:
1.97 christos 1200: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1201: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1202: IPPROTO_IPV6);
1.35 itojun 1203: if (*mp)
1204: mp = &(*mp)->m_next;
1205: break;
1206:
1207: case IPPROTO_ROUTING:
1.127 martin 1208: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1209: break;
1210:
1.97 christos 1211: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1212: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1213: IPPROTO_IPV6);
1.35 itojun 1214: if (*mp)
1215: mp = &(*mp)->m_next;
1216: break;
1217:
1.62 itojun 1218: case IPPROTO_HOPOPTS:
1219: case IPPROTO_AH: /* is it possible? */
1220: break;
1221:
1.35 itojun 1222: default:
1223: /*
1.62 itojun 1224: * other cases have been filtered in the above.
1225: * none will visit this case. here we supply
1226: * the code just in case (nxt overwritten or
1227: * other cases).
1.35 itojun 1228: */
1.62 itojun 1229: m_freem(ext);
1.35 itojun 1230: goto loopend;
1231:
1.2 itojun 1232: }
1233:
1234: /* proceed with the next header. */
1.9 itojun 1235: off += elen;
1.2 itojun 1236: nxt = ip6e->ip6e_nxt;
1.62 itojun 1237: ip6e = NULL;
1238: m_freem(ext);
1239: ext = NULL;
1.2 itojun 1240: }
1241: loopend:
1.62 itojun 1242: ;
1.2 itojun 1243: }
1.62 itojun 1244: }
1.85 rpaulo 1245: #undef IS2292
1246:
1247:
1248: void
1.95 dyoung 1249: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1250: uint32_t *mtu)
1.85 rpaulo 1251: {
1252: struct socket *so;
1253: struct mbuf *m_mtu;
1254: struct ip6_mtuinfo mtuctl;
1255:
1256: so = in6p->in6p_socket;
1257:
1258: if (mtu == NULL)
1259: return;
1260:
1261: #ifdef DIAGNOSTIC
1262: if (so == NULL) /* I believe this is impossible */
1263: panic("ip6_notify_pmtu: socket is NULL");
1264: #endif
1265:
1266: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1267: mtuctl.ip6m_mtu = *mtu;
1268: mtuctl.ip6m_addr = *dst;
1269: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1270: return;
1271:
1.97 christos 1272: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1273: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1274: return;
1275:
1.95 dyoung 1276: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1277: == 0) {
1278: m_freem(m_mtu);
1279: /* XXX: should count statistics */
1280: } else
1281: sorwakeup(so);
1282:
1283: return;
1284: }
1.62 itojun 1285:
1286: /*
1287: * pull single extension header from mbuf chain. returns single mbuf that
1288: * contains the result, or NULL on error.
1289: */
1290: static struct mbuf *
1.107 christos 1291: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1292: {
1293: struct ip6_ext ip6e;
1294: size_t elen;
1295: struct mbuf *n;
1296:
1297: #ifdef DIAGNOSTIC
1298: switch (nxt) {
1299: case IPPROTO_DSTOPTS:
1300: case IPPROTO_ROUTING:
1301: case IPPROTO_HOPOPTS:
1302: case IPPROTO_AH: /* is it possible? */
1303: break;
1304: default:
1305: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1306: }
1.62 itojun 1307: #endif
1.2 itojun 1308:
1.97 christos 1309: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1310: if (nxt == IPPROTO_AH)
1311: elen = (ip6e.ip6e_len + 2) << 2;
1312: else
1313: elen = (ip6e.ip6e_len + 1) << 3;
1314:
1315: MGET(n, M_DONTWAIT, MT_DATA);
1316: if (n && elen >= MLEN) {
1317: MCLGET(n, M_DONTWAIT);
1318: if ((n->m_flags & M_EXT) == 0) {
1319: m_free(n);
1320: n = NULL;
1321: }
1322: }
1323: if (!n)
1324: return NULL;
1325:
1326: n->m_len = 0;
1327: if (elen >= M_TRAILINGSPACE(n)) {
1328: m_free(n);
1329: return NULL;
1330: }
1331:
1.97 christos 1332: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1333: n->m_len = elen;
1334: return n;
1.2 itojun 1335: }
1336:
1337: /*
1338: * Get pointer to the previous header followed by the header
1339: * currently processed.
1340: * XXX: This function supposes that
1341: * M includes all headers,
1342: * the next header field and the header length field of each header
1343: * are valid, and
1344: * the sum of each header length equals to OFF.
1345: * Because of these assumptions, this function must be called very
1346: * carefully. Moreover, it will not be used in the near future when
1347: * we develop `neater' mechanism to process extension headers.
1348: */
1.58 itojun 1349: u_int8_t *
1.107 christos 1350: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1351: {
1352: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1353:
1354: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1355: return (&ip6->ip6_nxt);
1.2 itojun 1356: else {
1357: int len, nxt;
1358: struct ip6_ext *ip6e = NULL;
1359:
1360: nxt = ip6->ip6_nxt;
1361: len = sizeof(struct ip6_hdr);
1362: while (len < off) {
1.97 christos 1363: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1364:
1.35 itojun 1365: switch (nxt) {
1.2 itojun 1366: case IPPROTO_FRAGMENT:
1367: len += sizeof(struct ip6_frag);
1368: break;
1369: case IPPROTO_AH:
1370: len += (ip6e->ip6e_len + 2) << 2;
1371: break;
1372: default:
1373: len += (ip6e->ip6e_len + 1) << 3;
1374: break;
1375: }
1376: nxt = ip6e->ip6e_nxt;
1377: }
1378: if (ip6e)
1.58 itojun 1379: return (&ip6e->ip6e_nxt);
1.2 itojun 1380: else
1381: return NULL;
1.18 itojun 1382: }
1383: }
1384:
1385: /*
1386: * get next header offset. m will be retained.
1387: */
1388: int
1.107 christos 1389: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1390: {
1391: struct ip6_hdr ip6;
1392: struct ip6_ext ip6e;
1393: struct ip6_frag fh;
1394:
1395: /* just in case */
1396: if (m == NULL)
1397: panic("ip6_nexthdr: m == NULL");
1398: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1399: return -1;
1400:
1401: switch (proto) {
1402: case IPPROTO_IPV6:
1.83 rpaulo 1403: /* do not chase beyond intermediate IPv6 headers */
1404: if (off != 0)
1405: return -1;
1.18 itojun 1406: if (m->m_pkthdr.len < off + sizeof(ip6))
1407: return -1;
1.97 christos 1408: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1409: if (nxtp)
1410: *nxtp = ip6.ip6_nxt;
1411: off += sizeof(ip6);
1412: return off;
1413:
1414: case IPPROTO_FRAGMENT:
1415: /*
1416: * terminate parsing if it is not the first fragment,
1417: * it does not make sense to parse through it.
1418: */
1419: if (m->m_pkthdr.len < off + sizeof(fh))
1420: return -1;
1.97 christos 1421: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1422: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1423: return -1;
1424: if (nxtp)
1425: *nxtp = fh.ip6f_nxt;
1426: off += sizeof(struct ip6_frag);
1427: return off;
1428:
1429: case IPPROTO_AH:
1430: if (m->m_pkthdr.len < off + sizeof(ip6e))
1431: return -1;
1.97 christos 1432: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1433: if (nxtp)
1434: *nxtp = ip6e.ip6e_nxt;
1435: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1436: if (m->m_pkthdr.len < off)
1437: return -1;
1.18 itojun 1438: return off;
1439:
1440: case IPPROTO_HOPOPTS:
1441: case IPPROTO_ROUTING:
1442: case IPPROTO_DSTOPTS:
1443: if (m->m_pkthdr.len < off + sizeof(ip6e))
1444: return -1;
1.97 christos 1445: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1446: if (nxtp)
1447: *nxtp = ip6e.ip6e_nxt;
1448: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1449: if (m->m_pkthdr.len < off)
1450: return -1;
1.18 itojun 1451: return off;
1452:
1453: case IPPROTO_NONE:
1454: case IPPROTO_ESP:
1455: case IPPROTO_IPCOMP:
1456: /* give up */
1457: return -1;
1458:
1459: default:
1460: return -1;
1461: }
1462: }
1463:
1464: /*
1465: * get offset for the last header in the chain. m will be kept untainted.
1466: */
1467: int
1.107 christos 1468: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1469: {
1470: int newoff;
1471: int nxt;
1472:
1473: if (!nxtp) {
1474: nxt = -1;
1475: nxtp = &nxt;
1476: }
1.86 rpaulo 1477: for (;;) {
1.18 itojun 1478: newoff = ip6_nexthdr(m, off, proto, nxtp);
1479: if (newoff < 0)
1480: return off;
1481: else if (newoff < off)
1482: return -1; /* invalid */
1483: else if (newoff == off)
1484: return newoff;
1485:
1486: off = newoff;
1487: proto = *nxtp;
1.2 itojun 1488: }
1489: }
1490:
1.81 rpaulo 1491: struct m_tag *
1.107 christos 1492: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1493: {
1494: struct m_tag *mtag;
1495:
1496: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1497: if (!mtag) {
1498: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1499: M_NOWAIT);
1500: if (mtag) {
1501: m_tag_prepend(m, mtag);
1.124 cegger 1502: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1503: }
1504: }
1505: return mtag;
1506: }
1507:
1508: struct m_tag *
1.107 christos 1509: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1510: {
1511: struct m_tag *mtag;
1512:
1513: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1514: return mtag;
1515: }
1516:
1517: void
1.107 christos 1518: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1519: {
1520: struct m_tag *mtag;
1521:
1522: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1523: if (mtag)
1524: m_tag_delete(m, mtag);
1525: }
1526:
1.98 liamjfoy 1527: #ifdef GATEWAY
1528: /*
1529: * sysctl helper routine for net.inet.ip6.maxflows. Since
1530: * we could reduce this value, call ip6flow_reap();
1531: */
1532: static int
1.101 liamjfoy 1533: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1534: {
1.121 simonb 1535: int error;
1.98 liamjfoy 1536:
1.121 simonb 1537: error = sysctl_lookup(SYSCTLFN_CALL(rnode));
1538: if (error || newp == NULL)
1539: return (error);
1.98 liamjfoy 1540:
1.121 simonb 1541: mutex_enter(softnet_lock);
1.122 matt 1542: KERNEL_LOCK(1, NULL);
1.120 matt 1543:
1.121 simonb 1544: ip6flow_reap(0);
1.120 matt 1545:
1546: KERNEL_UNLOCK_ONE(NULL);
1.121 simonb 1547: mutex_exit(softnet_lock);
1.98 liamjfoy 1548:
1.121 simonb 1549: return (0);
1.98 liamjfoy 1550: }
1.99 liamjfoy 1551:
1552: static int
1553: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1554: {
1555: int error, tmp;
1556: struct sysctlnode node;
1557:
1558: node = *rnode;
1559: tmp = ip6_hashsize;
1560: node.sysctl_data = &tmp;
1561: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1562: if (error || newp == NULL)
1563: return (error);
1564:
1565: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1566: /*
1567: * Can only fail due to malloc()
1568: */
1.120 matt 1569: mutex_enter(softnet_lock);
1.122 matt 1570: KERNEL_LOCK(1, NULL);
1.120 matt 1571:
1572: error = ip6flow_invalidate_all(tmp);
1573:
1574: KERNEL_UNLOCK_ONE(NULL);
1575: mutex_exit(softnet_lock);
1.99 liamjfoy 1576: } else {
1577: /*
1578: * EINVAL if not a power of 2
1.121 simonb 1579: */
1.120 matt 1580: error = EINVAL;
1.99 liamjfoy 1581: }
1582:
1.120 matt 1583: return error;
1.99 liamjfoy 1584: }
1.98 liamjfoy 1585: #endif /* GATEWAY */
1586:
1.2 itojun 1587: /*
1588: * System control for IP6
1589: */
1590:
1.120 matt 1591: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1592: 0, 0, 0, 0,
1593: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1594: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1595: EMSGSIZE, EHOSTUNREACH, 0, 0,
1596: 0, 0, 0, 0,
1597: ENOPROTOOPT
1598: };
1599:
1.153 christos 1600: extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS);
1601:
1.116 thorpej 1602: static int
1603: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1604: {
1605:
1.119 thorpej 1606: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1607: }
1608:
1.128 pooka 1609: static void
1610: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1611: {
1.85 rpaulo 1612: #ifdef RFC2292
1613: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1614: #else
1615: #define IS2292(x, y) (y)
1616: #endif
1.26 itojun 1617:
1.73 atatat 1618: sysctl_createv(clog, 0, NULL, NULL,
1619: CTLFLAG_PERMANENT,
1.74 atatat 1620: CTLTYPE_NODE, "inet6",
1621: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1622: NULL, 0, NULL, 0,
1623: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1624: sysctl_createv(clog, 0, NULL, NULL,
1625: CTLFLAG_PERMANENT,
1.74 atatat 1626: CTLTYPE_NODE, "ip6",
1627: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1628: NULL, 0, NULL, 0,
1629: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1630:
1.73 atatat 1631: sysctl_createv(clog, 0, NULL, NULL,
1632: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1633: CTLTYPE_INT, "forwarding",
1634: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1635: NULL, 0, &ip6_forwarding, 0,
1636: CTL_NET, PF_INET6, IPPROTO_IPV6,
1637: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1638: sysctl_createv(clog, 0, NULL, NULL,
1639: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1640: CTLTYPE_INT, "redirect",
1641: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1642: NULL, 0, &ip6_sendredirects, 0,
1643: CTL_NET, PF_INET6, IPPROTO_IPV6,
1644: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1645: sysctl_createv(clog, 0, NULL, NULL,
1646: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1647: CTLTYPE_INT, "hlim",
1648: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1649: NULL, 0, &ip6_defhlim, 0,
1650: CTL_NET, PF_INET6, IPPROTO_IPV6,
1651: IPV6CTL_DEFHLIM, CTL_EOL);
1652: #ifdef notyet
1.73 atatat 1653: sysctl_createv(clog, 0, NULL, NULL,
1654: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1655: CTLTYPE_INT, "mtu", NULL,
1656: NULL, 0, &, 0,
1657: CTL_NET, PF_INET6, IPPROTO_IPV6,
1658: IPV6CTL_DEFMTU, CTL_EOL);
1659: #endif
1660: #ifdef __no_idea__
1.73 atatat 1661: sysctl_createv(clog, 0, NULL, NULL,
1662: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1663: CTLTYPE_INT, "forwsrcrt", NULL,
1664: NULL, 0, &?, 0,
1665: CTL_NET, PF_INET6, IPPROTO_IPV6,
1666: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1667: sysctl_createv(clog, 0, NULL, NULL,
1668: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1669: CTLTYPE_STRUCT, "mrtstats", NULL,
1670: NULL, 0, &?, sizeof(?),
1671: CTL_NET, PF_INET6, IPPROTO_IPV6,
1672: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1673: sysctl_createv(clog, 0, NULL, NULL,
1674: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1675: CTLTYPE_?, "mrtproto", NULL,
1676: NULL, 0, &?, sizeof(?),
1677: CTL_NET, PF_INET6, IPPROTO_IPV6,
1678: IPV6CTL_MRTPROTO, CTL_EOL);
1679: #endif
1.73 atatat 1680: sysctl_createv(clog, 0, NULL, NULL,
1681: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1682: CTLTYPE_INT, "maxfragpackets",
1683: SYSCTL_DESCR("Maximum number of fragments to buffer "
1684: "for reassembly"),
1.70 atatat 1685: NULL, 0, &ip6_maxfragpackets, 0,
1686: CTL_NET, PF_INET6, IPPROTO_IPV6,
1687: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1688: #ifdef __no_idea__
1.73 atatat 1689: sysctl_createv(clog, 0, NULL, NULL,
1690: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1691: CTLTYPE_INT, "sourcecheck", NULL,
1692: NULL, 0, &?, 0,
1693: CTL_NET, PF_INET6, IPPROTO_IPV6,
1694: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1695: sysctl_createv(clog, 0, NULL, NULL,
1696: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1697: CTLTYPE_INT, "sourcecheck_logint", NULL,
1698: NULL, 0, &?, 0,
1699: CTL_NET, PF_INET6, IPPROTO_IPV6,
1700: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1701: #endif
1.73 atatat 1702: sysctl_createv(clog, 0, NULL, NULL,
1703: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1704: CTLTYPE_INT, "accept_rtadv",
1705: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1706: NULL, 0, &ip6_accept_rtadv, 0,
1707: CTL_NET, PF_INET6, IPPROTO_IPV6,
1708: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1709: sysctl_createv(clog, 0, NULL, NULL,
1710: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1711: CTLTYPE_INT, "rtadv_maxroutes",
1712: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1713: NULL, 0, &ip6_rtadv_maxroutes, 0,
1714: CTL_NET, PF_INET6, IPPROTO_IPV6,
1715: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1716: sysctl_createv(clog, 0, NULL, NULL,
1717: CTLFLAG_PERMANENT,
1718: CTLTYPE_INT, "rtadv_numroutes",
1719: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1720: NULL, 0, &nd6_numroutes, 0,
1721: CTL_NET, PF_INET6, IPPROTO_IPV6,
1722: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1723: sysctl_createv(clog, 0, NULL, NULL,
1724: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1725: CTLTYPE_INT, "keepfaith",
1726: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1727: NULL, 0, &ip6_keepfaith, 0,
1728: CTL_NET, PF_INET6, IPPROTO_IPV6,
1729: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1730: sysctl_createv(clog, 0, NULL, NULL,
1731: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1732: CTLTYPE_INT, "log_interval",
1733: SYSCTL_DESCR("Minumum interval between logging "
1734: "unroutable packets"),
1.70 atatat 1735: NULL, 0, &ip6_log_interval, 0,
1736: CTL_NET, PF_INET6, IPPROTO_IPV6,
1737: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1738: sysctl_createv(clog, 0, NULL, NULL,
1739: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1740: CTLTYPE_INT, "hdrnestlimit",
1741: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1742: NULL, 0, &ip6_hdrnestlimit, 0,
1743: CTL_NET, PF_INET6, IPPROTO_IPV6,
1744: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1745: sysctl_createv(clog, 0, NULL, NULL,
1746: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1747: CTLTYPE_INT, "dad_count",
1748: SYSCTL_DESCR("Number of Duplicate Address Detection "
1749: "probes to send"),
1.70 atatat 1750: NULL, 0, &ip6_dad_count, 0,
1751: CTL_NET, PF_INET6, IPPROTO_IPV6,
1752: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1753: sysctl_createv(clog, 0, NULL, NULL,
1754: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1755: CTLTYPE_INT, "auto_flowlabel",
1756: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1757: NULL, 0, &ip6_auto_flowlabel, 0,
1758: CTL_NET, PF_INET6, IPPROTO_IPV6,
1759: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1760: sysctl_createv(clog, 0, NULL, NULL,
1761: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1762: CTLTYPE_INT, "defmcasthlim",
1763: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1764: NULL, 0, &ip6_defmcasthlim, 0,
1765: CTL_NET, PF_INET6, IPPROTO_IPV6,
1766: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.73 atatat 1767: sysctl_createv(clog, 0, NULL, NULL,
1768: CTLFLAG_PERMANENT,
1.74 atatat 1769: CTLTYPE_STRING, "kame_version",
1770: SYSCTL_DESCR("KAME Version"),
1.78 christos 1771: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1772: CTL_NET, PF_INET6, IPPROTO_IPV6,
1773: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1774: sysctl_createv(clog, 0, NULL, NULL,
1775: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1776: CTLTYPE_INT, "use_deprecated",
1777: SYSCTL_DESCR("Allow use of deprecated addresses as "
1778: "source addresses"),
1.70 atatat 1779: NULL, 0, &ip6_use_deprecated, 0,
1780: CTL_NET, PF_INET6, IPPROTO_IPV6,
1781: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1782: sysctl_createv(clog, 0, NULL, NULL,
1783: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1784: CTLTYPE_INT, "rr_prune", NULL,
1785: NULL, 0, &ip6_rr_prune, 0,
1786: CTL_NET, PF_INET6, IPPROTO_IPV6,
1787: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1788: sysctl_createv(clog, 0, NULL, NULL,
1789: CTLFLAG_PERMANENT
1.70 atatat 1790: #ifndef INET6_BINDV6ONLY
1.73 atatat 1791: |CTLFLAG_READWRITE,
1.70 atatat 1792: #endif
1.74 atatat 1793: CTLTYPE_INT, "v6only",
1794: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1795: "to PF_INET sockets"),
1.70 atatat 1796: NULL, 0, &ip6_v6only, 0,
1797: CTL_NET, PF_INET6, IPPROTO_IPV6,
1798: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1799: sysctl_createv(clog, 0, NULL, NULL,
1800: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1801: CTLTYPE_INT, "anonportmin",
1802: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1803: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1804: CTL_NET, PF_INET6, IPPROTO_IPV6,
1805: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1806: sysctl_createv(clog, 0, NULL, NULL,
1807: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1808: CTLTYPE_INT, "anonportmax",
1809: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1810: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1811: CTL_NET, PF_INET6, IPPROTO_IPV6,
1812: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1813: #ifndef IPNOPRIVPORTS
1.73 atatat 1814: sysctl_createv(clog, 0, NULL, NULL,
1815: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1816: CTLTYPE_INT, "lowportmin",
1817: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1818: "to assign"),
1.70 atatat 1819: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1820: CTL_NET, PF_INET6, IPPROTO_IPV6,
1821: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1822: sysctl_createv(clog, 0, NULL, NULL,
1823: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1824: CTLTYPE_INT, "lowportmax",
1825: SYSCTL_DESCR("Highest privileged ephemeral port number "
1826: "to assign"),
1.70 atatat 1827: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1828: CTL_NET, PF_INET6, IPPROTO_IPV6,
1829: IPV6CTL_LOWPORTMAX, CTL_EOL);
1830: #endif /* IPNOPRIVPORTS */
1.73 atatat 1831: sysctl_createv(clog, 0, NULL, NULL,
1832: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.153 christos 1833: CTLTYPE_INT, "auto_linklocal",
1834: SYSCTL_DESCR("Default value of per-interface flag for "
1835: "adding an IPv6 link-local address to "
1836: "interfaces when attached"),
1837: NULL, 0, &ip6_auto_linklocal, 0,
1838: CTL_NET, PF_INET6, IPPROTO_IPV6,
1839: IPV6CTL_AUTO_LINKLOCAL, CTL_EOL);
1840: sysctl_createv(clog, 0, NULL, NULL,
1841: CTLFLAG_PERMANENT|CTLFLAG_READONLY,
1842: CTLTYPE_STRUCT, "addctlpolicy",
1843: SYSCTL_DESCR("Return the current address control"
1844: " policy"),
1845: sysctl_net_inet6_addrctlpolicy, 0, NULL, 0,
1846: CTL_NET, PF_INET6, IPPROTO_IPV6,
1847: IPV6CTL_ADDRCTLPOLICY, CTL_EOL);
1848: sysctl_createv(clog, 0, NULL, NULL,
1849: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1850: CTLTYPE_INT, "use_tempaddr",
1851: SYSCTL_DESCR("Use temporary address"),
1852: NULL, 0, &ip6_use_tempaddr, 0,
1853: CTL_NET, PF_INET6, IPPROTO_IPV6,
1854: CTL_CREATE, CTL_EOL);
1855: sysctl_createv(clog, 0, NULL, NULL,
1856: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.150 roy 1857: CTLTYPE_INT, "prefer_tempaddr",
1858: SYSCTL_DESCR("Prefer temporary address as source "
1859: "address"),
1860: NULL, 0, &ip6_prefer_tempaddr, 0,
1861: CTL_NET, PF_INET6, IPPROTO_IPV6,
1862: CTL_CREATE, CTL_EOL);
1863: sysctl_createv(clog, 0, NULL, NULL,
1864: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1865: CTLTYPE_INT, "temppltime",
1866: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1867: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1868: CTL_NET, PF_INET6, IPPROTO_IPV6,
1869: CTL_CREATE, CTL_EOL);
1870: sysctl_createv(clog, 0, NULL, NULL,
1871: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1872: CTLTYPE_INT, "tempvltime",
1873: SYSCTL_DESCR("valid lifetime of a temporary address"),
1874: NULL, 0, &ip6_temp_valid_lifetime, 0,
1875: CTL_NET, PF_INET6, IPPROTO_IPV6,
1876: CTL_CREATE, CTL_EOL);
1877: sysctl_createv(clog, 0, NULL, NULL,
1878: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1879: CTLTYPE_INT, "maxfrags",
1880: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1881: NULL, 0, &ip6_maxfrags, 0,
1882: CTL_NET, PF_INET6, IPPROTO_IPV6,
1883: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1884: sysctl_createv(clog, 0, NULL, NULL,
1885: CTLFLAG_PERMANENT,
1886: CTLTYPE_STRUCT, "stats",
1887: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1888: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1889: CTL_NET, PF_INET6, IPPROTO_IPV6,
1890: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1891: sysctl_createv(clog, 0, NULL, NULL,
1892: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1893: CTLTYPE_INT, "use_defaultzone",
1894: SYSCTL_DESCR("Whether to use the default scope zones"),
1895: NULL, 0, &ip6_use_defzone, 0,
1896: CTL_NET, PF_INET6, IPPROTO_IPV6,
1897: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1898: sysctl_createv(clog, 0, NULL, NULL,
1899: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1900: CTLTYPE_INT, "mcast_pmtu",
1901: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1902: NULL, 0, &ip6_mcast_pmtu, 0,
1903: CTL_NET, PF_INET6, IPPROTO_IPV6,
1904: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1905: #ifdef GATEWAY
1906: sysctl_createv(clog, 0, NULL, NULL,
1907: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1908: CTLTYPE_INT, "maxflows",
1909: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.101 liamjfoy 1910: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1911: CTL_NET, PF_INET6, IPPROTO_IPV6,
1912: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1913: sysctl_createv(clog, 0, NULL, NULL,
1914: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1915: CTLTYPE_INT, "hashsize",
1916: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1917: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1918: CTL_NET, PF_INET6, IPPROTO_IPV6,
1919: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1920: #endif
1.138 christos 1921: /* anonportalgo RFC6056 subtree */
1.140 christos 1922: const struct sysctlnode *portalgo_node;
1923: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1924: CTLFLAG_PERMANENT,
1925: CTLTYPE_NODE, "anonportalgo",
1926: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1927: NULL, 0, NULL, 0,
1928: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1929: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1930: CTLFLAG_PERMANENT,
1931: CTLTYPE_STRING, "available",
1932: SYSCTL_DESCR("available algorithms"),
1.140 christos 1933: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1934: CTL_CREATE, CTL_EOL);
1.140 christos 1935: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1936: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1937: CTLTYPE_STRING, "selected",
1938: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1939: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1940: CTL_CREATE, CTL_EOL);
1.141 christos 1941: sysctl_createv(clog, 0, &portalgo_node, NULL,
1942: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1943: CTLTYPE_STRUCT, "reserve",
1944: SYSCTL_DESCR("bitmap of reserved ports"),
1945: sysctl_portalgo_reserve6, 0, NULL, 0,
1946: CTL_CREATE, CTL_EOL);
1.139 christos 1947: sysctl_createv(clog, 0, NULL, NULL,
1948: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1949: CTLTYPE_INT, "neighborgcthresh",
1950: SYSCTL_DESCR("Maximum number of entries in neighbor"
1951: " cache"),
1952: NULL, 1, &ip6_neighborgcthresh, 0,
1953: CTL_NET, PF_INET6, IPPROTO_IPV6,
1954: CTL_CREATE, CTL_EOL);
1955: sysctl_createv(clog, 0, NULL, NULL,
1956: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1957: CTLTYPE_INT, "maxifprefixes",
1958: SYSCTL_DESCR("Maximum number of prefixes created by"
1959: " route advertisement per interface"),
1960: NULL, 1, &ip6_maxifprefixes, 0,
1961: CTL_NET, PF_INET6, IPPROTO_IPV6,
1962: CTL_CREATE, CTL_EOL);
1963: sysctl_createv(clog, 0, NULL, NULL,
1964: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1965: CTLTYPE_INT, "maxifdefrouters",
1966: SYSCTL_DESCR("Maximum number of default routers created"
1967: " by route advertisement per interface"),
1968: NULL, 1, &ip6_maxifdefrouters, 0,
1969: CTL_NET, PF_INET6, IPPROTO_IPV6,
1970: CTL_CREATE, CTL_EOL);
1971: sysctl_createv(clog, 0, NULL, NULL,
1972: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1973: CTLTYPE_INT, "maxdynroutes",
1974: SYSCTL_DESCR("Maximum number of routes created via"
1975: " redirect"),
1976: NULL, 1, &ip6_maxdynroutes, 0,
1977: CTL_NET, PF_INET6, IPPROTO_IPV6,
1978: CTL_CREATE, CTL_EOL);
1.2 itojun 1979: }
1.116 thorpej 1980:
1981: void
1982: ip6_statinc(u_int stat)
1983: {
1984:
1985: KASSERT(stat < IP6_NSTATS);
1986: IP6_STATINC(stat);
1987: }
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