Annotation of src/sys/netinet6/ip6_input.c, Revision 1.149.4.5
1.149.4.5! skrll 1: /* $NetBSD: ip6_input.c,v 1.149.4.4 2016/03/19 11:30:33 skrll 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>
1.149.4.5! skrll 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.149.4.4 2016/03/19 11:30:33 skrll Exp $");
1.2 itojun 66:
1.149.4.2 skrll 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"
1.149.4.2 skrll 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:
1.149.4.5! skrll 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:
1.149.4.5! skrll 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
1.149.4.5! skrll 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
1.149.4.2 skrll 413: * is not loopback.
1.82 yamt 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 &&
1.2 itojun 479: #if 0
480: /*
481: * The check below is redundant since the comparison of
482: * the destination and the key of the rtentry has
483: * already done through looking up the routing table.
484: */
1.109 dyoung 485: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 486: #endif
1.105 dyoung 487: rt->rt_ifp->if_type == IFT_LOOP) {
488: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 489: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
490: m->m_flags |= M_ANYCAST6;
1.24 itojun 491: /*
492: * packets to a tentative, duplicated, or somehow invalid
493: * address must not be accepted.
494: */
1.2 itojun 495: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 496: /* this address is ready */
1.2 itojun 497: ours = 1;
1.9 itojun 498: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 499: goto hbhcheck;
500: } else {
1.24 itojun 501: /* address is not ready, so discard the packet. */
1.149.4.5! skrll 502: nd6log(LOG_INFO, "packet to an unready address %s->%s\n",
1.24 itojun 503: ip6_sprintf(&ip6->ip6_src),
1.149.4.5! skrll 504: ip6_sprintf(&ip6->ip6_dst));
1.24 itojun 505:
506: goto bad;
1.2 itojun 507: }
508: }
509:
510: /*
1.55 itojun 511: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 512: */
513: #if defined(NFAITH) && 0 < NFAITH
514: if (ip6_keepfaith) {
1.105 dyoung 515: if (rt != NULL && rt->rt_ifp != NULL &&
516: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 517: /* XXX do we need more sanity checks? */
518: ours = 1;
1.105 dyoung 519: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 520: goto hbhcheck;
521: }
522: }
523: #endif
524:
525: #if 0
526: {
527: /*
528: * Last resort: check in6_ifaddr for incoming interface.
529: * The code is here until I update the "goto ours hack" code above
530: * working right.
531: */
532: struct ifaddr *ifa;
1.113 dyoung 533: IFADDR_FOREACH(ifa, m->m_pkthdr.rcvif) {
1.9 itojun 534: if (ifa->ifa_addr == NULL)
535: continue; /* just for safety */
536: if (ifa->ifa_addr->sa_family != AF_INET6)
537: continue;
538: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
539: ours = 1;
540: deliverifp = ifa->ifa_ifp;
1.2 itojun 541: goto hbhcheck;
542: }
543: }
1.9 itojun 544: }
1.2 itojun 545: #endif
546:
547: /*
548: * Now there is no reason to process the packet if it's not our own
549: * and we're not a router.
550: */
551: if (!ip6_forwarding) {
1.116 thorpej 552: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.9 itojun 553: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 554: goto bad;
555: }
556:
557: hbhcheck:
558: /*
1.81 rpaulo 559: * record address information into m_tag, if we don't have one yet.
560: * note that we are unable to record it, if the address is not listed
561: * as our interface address (e.g. multicast addresses, addresses
562: * within FAITH prefixes and such).
563: */
1.111 dyoung 564: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 565: struct in6_ifaddr *ia6;
566:
567: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.111 dyoung 568: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
569: /*
570: * XXX maybe we should drop the packet here,
571: * as we could not provide enough information
572: * to the upper layers.
573: */
1.81 rpaulo 574: }
575: }
576:
577: /*
1.2 itojun 578: * Process Hop-by-Hop options header if it's contained.
579: * m may be modified in ip6_hopopts_input().
580: * If a JumboPayload option is included, plen will also be modified.
581: */
582: plen = (u_int32_t)ntohs(ip6->ip6_plen);
583: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 584: struct ip6_hbh *hbh;
585:
586: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
587: #if 0 /*touches NULL pointer*/
588: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
589: #endif
1.2 itojun 590: return; /* m have already been freed */
1.9 itojun 591: }
1.22 itojun 592:
1.2 itojun 593: /* adjust pointer */
594: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 595:
596: /*
1.49 itojun 597: * if the payload length field is 0 and the next header field
1.22 itojun 598: * indicates Hop-by-Hop Options header, then a Jumbo Payload
599: * option MUST be included.
600: */
601: if (ip6->ip6_plen == 0 && plen == 0) {
602: /*
603: * Note that if a valid jumbo payload option is
1.83 rpaulo 604: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 605: * (non-zero) payload length to the variable plen.
1.22 itojun 606: */
1.116 thorpej 607: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 608: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
609: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
610: icmp6_error(m, ICMP6_PARAM_PROB,
611: ICMP6_PARAMPROB_HEADER,
1.97 christos 612: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 613: return;
614: }
1.9 itojun 615: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
616: sizeof(struct ip6_hbh));
617: if (hbh == NULL) {
1.116 thorpej 618: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 619: return;
620: }
1.57 thorpej 621: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 622: nxt = hbh->ip6h_nxt;
1.2 itojun 623:
624: /*
625: * accept the packet if a router alert option is included
626: * and we act as an IPv6 router.
627: */
1.5 itojun 628: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 629: ours = 1;
630: } else
631: nxt = ip6->ip6_nxt;
632:
633: /*
634: * Check that the amount of data in the buffers
635: * is as at least much as the IPv6 header would have us expect.
636: * Trim mbufs if longer than we expect.
637: * Drop packet if shorter than we expect.
638: */
639: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 640: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 641: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 642: goto bad;
643: }
644: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
645: if (m->m_len == m->m_pkthdr.len) {
646: m->m_len = sizeof(struct ip6_hdr) + plen;
647: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
648: } else
649: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
650: }
651:
652: /*
653: * Forward if desirable.
654: */
655: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
656: /*
657: * If we are acting as a multicast router, all
658: * incoming multicast packets are passed to the
659: * kernel-level multicast forwarding function.
660: * The packet is returned (relatively) intact; if
661: * ip6_mforward() returns a non-zero value, the packet
662: * must be discarded, else it may be accepted below.
663: */
664: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
1.116 thorpej 665: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.2 itojun 666: m_freem(m);
667: return;
668: }
669: if (!ours) {
670: m_freem(m);
671: return;
672: }
1.22 itojun 673: } else if (!ours) {
1.64 itojun 674: ip6_forward(m, srcrt);
1.2 itojun 675: return;
1.56 itojun 676: }
1.25 itojun 677:
678: ip6 = mtod(m, struct ip6_hdr *);
679:
680: /*
681: * Malicious party may be able to use IPv4 mapped addr to confuse
682: * tcp/udp stack and bypass security checks (act as if it was from
683: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
684: *
685: * For SIIT end node behavior, you may want to disable the check.
686: * However, you will become vulnerable to attacks using IPv4 mapped
687: * source.
688: */
689: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
690: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 691: IP6_STATINC(IP6_STAT_BADSCOPE);
1.25 itojun 692: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
693: goto bad;
694: }
1.2 itojun 695:
696: /*
697: * Tell launch routine the next header
698: */
1.12 itojun 699: #ifdef IFA_STATS
1.28 itojun 700: if (deliverifp != NULL) {
1.9 itojun 701: struct in6_ifaddr *ia6;
702: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
703: if (ia6)
704: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
705: }
706: #endif
1.116 thorpej 707: IP6_STATINC(IP6_STAT_DELIVERED);
1.9 itojun 708: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 709: nest = 0;
1.40 itojun 710:
1.104 yamt 711: rh_present = 0;
1.2 itojun 712: while (nxt != IPPROTO_DONE) {
713: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.116 thorpej 714: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.104 yamt 715: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 716: goto bad;
717: }
1.8 itojun 718:
719: /*
720: * protection against faulty packet - there should be
721: * more sanity checks in header chain processing.
722: */
723: if (m->m_pkthdr.len < off) {
1.116 thorpej 724: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 725: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 726: goto bad;
727: }
728:
1.104 yamt 729: if (nxt == IPPROTO_ROUTING) {
730: if (rh_present++) {
731: in6_ifstat_inc(m->m_pkthdr.rcvif,
732: 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) {
1.149.4.1 skrll 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
1.149.4.2 skrll 804: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
1.107 christos 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
1.149.4.2 skrll 849: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
1.107 christos 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
1.149.4.2 skrll 1024: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1.107 christos 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 */
1.84 christos 1065: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1066: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1067: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1068: sizeof(struct in6_pktinfo),
1069: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1070: if (*mp)
1071: mp = &(*mp)->m_next;
1072: }
1.85 rpaulo 1073:
1.2 itojun 1074: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1075: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1076:
1.97 christos 1077: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1078: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1079: if (*mp)
1080: mp = &(*mp)->m_next;
1081: }
1082:
1083: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1084: u_int32_t flowinfo;
1085: int tclass;
1086:
1087: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1088: flowinfo >>= 20;
1089:
1090: tclass = flowinfo & 0xff;
1.97 christos 1091: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1092: IPV6_TCLASS, IPPROTO_IPV6);
1093:
1.2 itojun 1094: if (*mp)
1095: mp = &(*mp)->m_next;
1096: }
1097:
1098: /*
1.75 itojun 1099: * IPV6_HOPOPTS socket option. Recall that we required super-user
1100: * privilege for the option (see ip6_ctloutput), but it might be too
1101: * strict, since there might be some hop-by-hop options which can be
1102: * returned to normal user.
1.85 rpaulo 1103: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1104: */
1.75 itojun 1105: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1106: /*
1107: * Check if a hop-by-hop options header is contatined in the
1108: * received packet, and if so, store the options as ancillary
1109: * data. Note that a hop-by-hop options header must be
1110: * just after the IPv6 header, which fact is assured through
1111: * the IPv6 input processing.
1112: */
1.78 christos 1113: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1114: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1115: struct ip6_hbh *hbh;
1116: int hbhlen;
1.62 itojun 1117: struct mbuf *ext;
1.9 itojun 1118:
1.62 itojun 1119: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1120: xip6->ip6_nxt);
1.62 itojun 1121: if (ext == NULL) {
1.116 thorpej 1122: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1123: return;
1124: }
1.62 itojun 1125: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1126: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1127: if (hbhlen != ext->m_len) {
1128: m_freem(ext);
1.116 thorpej 1129: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1130: return;
1131: }
1.2 itojun 1132:
1133: /*
1134: * XXX: We copy whole the header even if a jumbo
1135: * payload option is included, which option is to
1136: * be removed before returning in the RFC 2292.
1.85 rpaulo 1137: * Note: this constraint is removed in RFC3542.
1.2 itojun 1138: */
1.97 christos 1139: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1140: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1141: IPPROTO_IPV6);
1.2 itojun 1142: if (*mp)
1143: mp = &(*mp)->m_next;
1.62 itojun 1144: m_freem(ext);
1.2 itojun 1145: }
1146: }
1147:
1148: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1149: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1150: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1151: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1152:
1153: /*
1154: * Search for destination options headers or routing
1155: * header(s) through the header chain, and stores each
1156: * header as ancillary data.
1157: * Note that the order of the headers remains in
1158: * the chain of ancillary data.
1159: */
1.86 rpaulo 1160: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1161: struct ip6_ext *ip6e = NULL;
1.9 itojun 1162: int elen;
1.62 itojun 1163: struct mbuf *ext = NULL;
1.9 itojun 1164:
1.62 itojun 1165: /*
1166: * if it is not an extension header, don't try to
1167: * pull it from the chain.
1168: */
1169: switch (nxt) {
1170: case IPPROTO_DSTOPTS:
1171: case IPPROTO_ROUTING:
1172: case IPPROTO_HOPOPTS:
1173: case IPPROTO_AH: /* is it possible? */
1174: break;
1175: default:
1176: goto loopend;
1177: }
1178:
1179: ext = ip6_pullexthdr(m, off, nxt);
1180: if (ext == NULL) {
1.116 thorpej 1181: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1182: return;
1183: }
1.62 itojun 1184: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1185: if (nxt == IPPROTO_AH)
1186: elen = (ip6e->ip6e_len + 2) << 2;
1187: else
1188: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1189: if (elen != ext->m_len) {
1190: m_freem(ext);
1.116 thorpej 1191: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1192: return;
1193: }
1.57 thorpej 1194: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1195:
1.35 itojun 1196: switch (nxt) {
1.62 itojun 1197: case IPPROTO_DSTOPTS:
1.127 martin 1198: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1199: break;
1200:
1.97 christos 1201: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1202: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1203: IPPROTO_IPV6);
1.35 itojun 1204: if (*mp)
1205: mp = &(*mp)->m_next;
1206: break;
1207:
1208: case IPPROTO_ROUTING:
1.127 martin 1209: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1210: break;
1211:
1.97 christos 1212: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1213: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1214: IPPROTO_IPV6);
1.35 itojun 1215: if (*mp)
1216: mp = &(*mp)->m_next;
1217: break;
1218:
1.62 itojun 1219: case IPPROTO_HOPOPTS:
1220: case IPPROTO_AH: /* is it possible? */
1221: break;
1222:
1.35 itojun 1223: default:
1224: /*
1.62 itojun 1225: * other cases have been filtered in the above.
1226: * none will visit this case. here we supply
1227: * the code just in case (nxt overwritten or
1228: * other cases).
1.35 itojun 1229: */
1.62 itojun 1230: m_freem(ext);
1.35 itojun 1231: goto loopend;
1232:
1.2 itojun 1233: }
1234:
1235: /* proceed with the next header. */
1.9 itojun 1236: off += elen;
1.2 itojun 1237: nxt = ip6e->ip6e_nxt;
1.62 itojun 1238: ip6e = NULL;
1239: m_freem(ext);
1240: ext = NULL;
1.2 itojun 1241: }
1242: loopend:
1.62 itojun 1243: ;
1.2 itojun 1244: }
1.62 itojun 1245: }
1.85 rpaulo 1246: #undef IS2292
1247:
1248:
1249: void
1.95 dyoung 1250: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1251: uint32_t *mtu)
1.85 rpaulo 1252: {
1253: struct socket *so;
1254: struct mbuf *m_mtu;
1255: struct ip6_mtuinfo mtuctl;
1256:
1257: so = in6p->in6p_socket;
1258:
1259: if (mtu == NULL)
1260: return;
1261:
1262: #ifdef DIAGNOSTIC
1263: if (so == NULL) /* I believe this is impossible */
1264: panic("ip6_notify_pmtu: socket is NULL");
1265: #endif
1266:
1267: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1268: mtuctl.ip6m_mtu = *mtu;
1269: mtuctl.ip6m_addr = *dst;
1270: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1271: return;
1272:
1.97 christos 1273: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1274: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1275: return;
1276:
1.95 dyoung 1277: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1278: == 0) {
1279: m_freem(m_mtu);
1280: /* XXX: should count statistics */
1281: } else
1282: sorwakeup(so);
1283:
1284: return;
1285: }
1.62 itojun 1286:
1287: /*
1288: * pull single extension header from mbuf chain. returns single mbuf that
1289: * contains the result, or NULL on error.
1290: */
1291: static struct mbuf *
1.107 christos 1292: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1293: {
1294: struct ip6_ext ip6e;
1295: size_t elen;
1296: struct mbuf *n;
1297:
1298: #ifdef DIAGNOSTIC
1299: switch (nxt) {
1300: case IPPROTO_DSTOPTS:
1301: case IPPROTO_ROUTING:
1302: case IPPROTO_HOPOPTS:
1303: case IPPROTO_AH: /* is it possible? */
1304: break;
1305: default:
1306: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1307: }
1.62 itojun 1308: #endif
1.2 itojun 1309:
1.97 christos 1310: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1311: if (nxt == IPPROTO_AH)
1312: elen = (ip6e.ip6e_len + 2) << 2;
1313: else
1314: elen = (ip6e.ip6e_len + 1) << 3;
1315:
1316: MGET(n, M_DONTWAIT, MT_DATA);
1317: if (n && elen >= MLEN) {
1318: MCLGET(n, M_DONTWAIT);
1319: if ((n->m_flags & M_EXT) == 0) {
1320: m_free(n);
1321: n = NULL;
1322: }
1323: }
1324: if (!n)
1325: return NULL;
1326:
1327: n->m_len = 0;
1328: if (elen >= M_TRAILINGSPACE(n)) {
1329: m_free(n);
1330: return NULL;
1331: }
1332:
1.97 christos 1333: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1334: n->m_len = elen;
1335: return n;
1.2 itojun 1336: }
1337:
1338: /*
1339: * Get pointer to the previous header followed by the header
1340: * currently processed.
1341: * XXX: This function supposes that
1342: * M includes all headers,
1343: * the next header field and the header length field of each header
1344: * are valid, and
1345: * the sum of each header length equals to OFF.
1346: * Because of these assumptions, this function must be called very
1347: * carefully. Moreover, it will not be used in the near future when
1348: * we develop `neater' mechanism to process extension headers.
1349: */
1.58 itojun 1350: u_int8_t *
1.107 christos 1351: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1352: {
1353: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1354:
1355: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1356: return (&ip6->ip6_nxt);
1.2 itojun 1357: else {
1358: int len, nxt;
1359: struct ip6_ext *ip6e = NULL;
1360:
1361: nxt = ip6->ip6_nxt;
1362: len = sizeof(struct ip6_hdr);
1363: while (len < off) {
1.97 christos 1364: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1365:
1.35 itojun 1366: switch (nxt) {
1.2 itojun 1367: case IPPROTO_FRAGMENT:
1368: len += sizeof(struct ip6_frag);
1369: break;
1370: case IPPROTO_AH:
1371: len += (ip6e->ip6e_len + 2) << 2;
1372: break;
1373: default:
1374: len += (ip6e->ip6e_len + 1) << 3;
1375: break;
1376: }
1377: nxt = ip6e->ip6e_nxt;
1378: }
1379: if (ip6e)
1.58 itojun 1380: return (&ip6e->ip6e_nxt);
1.2 itojun 1381: else
1382: return NULL;
1.18 itojun 1383: }
1384: }
1385:
1386: /*
1387: * get next header offset. m will be retained.
1388: */
1389: int
1.107 christos 1390: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1391: {
1392: struct ip6_hdr ip6;
1393: struct ip6_ext ip6e;
1394: struct ip6_frag fh;
1395:
1396: /* just in case */
1397: if (m == NULL)
1398: panic("ip6_nexthdr: m == NULL");
1399: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1400: return -1;
1401:
1402: switch (proto) {
1403: case IPPROTO_IPV6:
1.83 rpaulo 1404: /* do not chase beyond intermediate IPv6 headers */
1405: if (off != 0)
1406: return -1;
1.18 itojun 1407: if (m->m_pkthdr.len < off + sizeof(ip6))
1408: return -1;
1.97 christos 1409: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1410: if (nxtp)
1411: *nxtp = ip6.ip6_nxt;
1412: off += sizeof(ip6);
1413: return off;
1414:
1415: case IPPROTO_FRAGMENT:
1416: /*
1417: * terminate parsing if it is not the first fragment,
1418: * it does not make sense to parse through it.
1419: */
1420: if (m->m_pkthdr.len < off + sizeof(fh))
1421: return -1;
1.97 christos 1422: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1423: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1424: return -1;
1425: if (nxtp)
1426: *nxtp = fh.ip6f_nxt;
1427: off += sizeof(struct ip6_frag);
1428: return off;
1429:
1430: case IPPROTO_AH:
1431: if (m->m_pkthdr.len < off + sizeof(ip6e))
1432: return -1;
1.97 christos 1433: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1434: if (nxtp)
1435: *nxtp = ip6e.ip6e_nxt;
1436: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1437: if (m->m_pkthdr.len < off)
1438: return -1;
1.18 itojun 1439: return off;
1440:
1441: case IPPROTO_HOPOPTS:
1442: case IPPROTO_ROUTING:
1443: case IPPROTO_DSTOPTS:
1444: if (m->m_pkthdr.len < off + sizeof(ip6e))
1445: return -1;
1.97 christos 1446: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1447: if (nxtp)
1448: *nxtp = ip6e.ip6e_nxt;
1449: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1450: if (m->m_pkthdr.len < off)
1451: return -1;
1.18 itojun 1452: return off;
1453:
1454: case IPPROTO_NONE:
1455: case IPPROTO_ESP:
1456: case IPPROTO_IPCOMP:
1457: /* give up */
1458: return -1;
1459:
1460: default:
1461: return -1;
1462: }
1463: }
1464:
1465: /*
1466: * get offset for the last header in the chain. m will be kept untainted.
1467: */
1468: int
1.107 christos 1469: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1470: {
1471: int newoff;
1472: int nxt;
1473:
1474: if (!nxtp) {
1475: nxt = -1;
1476: nxtp = &nxt;
1477: }
1.86 rpaulo 1478: for (;;) {
1.18 itojun 1479: newoff = ip6_nexthdr(m, off, proto, nxtp);
1480: if (newoff < 0)
1481: return off;
1482: else if (newoff < off)
1483: return -1; /* invalid */
1484: else if (newoff == off)
1485: return newoff;
1486:
1487: off = newoff;
1488: proto = *nxtp;
1.2 itojun 1489: }
1490: }
1491:
1.81 rpaulo 1492: struct m_tag *
1.107 christos 1493: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1494: {
1495: struct m_tag *mtag;
1496:
1497: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1498: if (!mtag) {
1499: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1500: M_NOWAIT);
1501: if (mtag) {
1502: m_tag_prepend(m, mtag);
1.124 cegger 1503: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1504: }
1505: }
1506: return mtag;
1507: }
1508:
1509: struct m_tag *
1.107 christos 1510: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1511: {
1512: struct m_tag *mtag;
1513:
1514: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1515: return mtag;
1516: }
1517:
1518: void
1.107 christos 1519: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1520: {
1521: struct m_tag *mtag;
1522:
1523: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1524: if (mtag)
1525: m_tag_delete(m, mtag);
1526: }
1527:
1.98 liamjfoy 1528: #ifdef GATEWAY
1.149.4.2 skrll 1529: /*
1.98 liamjfoy 1530: * sysctl helper routine for net.inet.ip6.maxflows. Since
1531: * we could reduce this value, call ip6flow_reap();
1532: */
1533: static int
1.101 liamjfoy 1534: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.149.4.2 skrll 1535: {
1.121 simonb 1536: int error;
1.149.4.2 skrll 1537:
1.121 simonb 1538: error = sysctl_lookup(SYSCTLFN_CALL(rnode));
1539: if (error || newp == NULL)
1540: return (error);
1.149.4.2 skrll 1541:
1.121 simonb 1542: mutex_enter(softnet_lock);
1.122 matt 1543: KERNEL_LOCK(1, NULL);
1.120 matt 1544:
1.121 simonb 1545: ip6flow_reap(0);
1.120 matt 1546:
1547: KERNEL_UNLOCK_ONE(NULL);
1.121 simonb 1548: mutex_exit(softnet_lock);
1.149.4.2 skrll 1549:
1.121 simonb 1550: return (0);
1.98 liamjfoy 1551: }
1.99 liamjfoy 1552:
1553: static int
1554: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1.149.4.2 skrll 1555: {
1.99 liamjfoy 1556: int error, tmp;
1557: struct sysctlnode node;
1558:
1559: node = *rnode;
1560: tmp = ip6_hashsize;
1561: node.sysctl_data = &tmp;
1562: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1563: if (error || newp == NULL)
1564: return (error);
1565:
1566: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1567: /*
1568: * Can only fail due to malloc()
1569: */
1.120 matt 1570: mutex_enter(softnet_lock);
1.122 matt 1571: KERNEL_LOCK(1, NULL);
1.120 matt 1572:
1573: error = ip6flow_invalidate_all(tmp);
1574:
1575: KERNEL_UNLOCK_ONE(NULL);
1576: mutex_exit(softnet_lock);
1.99 liamjfoy 1577: } else {
1578: /*
1579: * EINVAL if not a power of 2
1.121 simonb 1580: */
1.120 matt 1581: error = EINVAL;
1.149.4.2 skrll 1582: }
1.99 liamjfoy 1583:
1.120 matt 1584: return error;
1.99 liamjfoy 1585: }
1.98 liamjfoy 1586: #endif /* GATEWAY */
1587:
1.2 itojun 1588: /*
1589: * System control for IP6
1590: */
1591:
1.120 matt 1592: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1593: 0, 0, 0, 0,
1594: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1595: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1596: EMSGSIZE, EHOSTUNREACH, 0, 0,
1597: 0, 0, 0, 0,
1598: ENOPROTOOPT
1599: };
1600:
1.149.4.3 skrll 1601: extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS);
1602:
1.116 thorpej 1603: static int
1604: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1605: {
1606:
1.119 thorpej 1607: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1608: }
1609:
1.128 pooka 1610: static void
1611: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1612: {
1.85 rpaulo 1613: #ifdef RFC2292
1614: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1615: #else
1616: #define IS2292(x, y) (y)
1617: #endif
1.26 itojun 1618:
1.73 atatat 1619: sysctl_createv(clog, 0, NULL, NULL,
1620: CTLFLAG_PERMANENT,
1.74 atatat 1621: CTLTYPE_NODE, "inet6",
1622: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1623: NULL, 0, NULL, 0,
1624: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1625: sysctl_createv(clog, 0, NULL, NULL,
1626: CTLFLAG_PERMANENT,
1.74 atatat 1627: CTLTYPE_NODE, "ip6",
1628: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1629: NULL, 0, NULL, 0,
1630: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1631:
1.73 atatat 1632: sysctl_createv(clog, 0, NULL, NULL,
1633: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1634: CTLTYPE_INT, "forwarding",
1635: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1636: NULL, 0, &ip6_forwarding, 0,
1637: CTL_NET, PF_INET6, IPPROTO_IPV6,
1638: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1639: sysctl_createv(clog, 0, NULL, NULL,
1640: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1641: CTLTYPE_INT, "redirect",
1642: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1643: NULL, 0, &ip6_sendredirects, 0,
1644: CTL_NET, PF_INET6, IPPROTO_IPV6,
1645: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1646: sysctl_createv(clog, 0, NULL, NULL,
1647: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1648: CTLTYPE_INT, "hlim",
1649: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1650: NULL, 0, &ip6_defhlim, 0,
1651: CTL_NET, PF_INET6, IPPROTO_IPV6,
1652: IPV6CTL_DEFHLIM, CTL_EOL);
1653: #ifdef notyet
1.73 atatat 1654: sysctl_createv(clog, 0, NULL, NULL,
1655: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1656: CTLTYPE_INT, "mtu", NULL,
1657: NULL, 0, &, 0,
1658: CTL_NET, PF_INET6, IPPROTO_IPV6,
1659: IPV6CTL_DEFMTU, CTL_EOL);
1660: #endif
1661: #ifdef __no_idea__
1.73 atatat 1662: sysctl_createv(clog, 0, NULL, NULL,
1663: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1664: CTLTYPE_INT, "forwsrcrt", NULL,
1665: NULL, 0, &?, 0,
1666: CTL_NET, PF_INET6, IPPROTO_IPV6,
1667: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1668: sysctl_createv(clog, 0, NULL, NULL,
1669: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1670: CTLTYPE_STRUCT, "mrtstats", NULL,
1671: NULL, 0, &?, sizeof(?),
1672: CTL_NET, PF_INET6, IPPROTO_IPV6,
1673: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1674: sysctl_createv(clog, 0, NULL, NULL,
1675: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1676: CTLTYPE_?, "mrtproto", NULL,
1677: NULL, 0, &?, sizeof(?),
1678: CTL_NET, PF_INET6, IPPROTO_IPV6,
1679: IPV6CTL_MRTPROTO, CTL_EOL);
1680: #endif
1.73 atatat 1681: sysctl_createv(clog, 0, NULL, NULL,
1682: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1683: CTLTYPE_INT, "maxfragpackets",
1684: SYSCTL_DESCR("Maximum number of fragments to buffer "
1685: "for reassembly"),
1.70 atatat 1686: NULL, 0, &ip6_maxfragpackets, 0,
1687: CTL_NET, PF_INET6, IPPROTO_IPV6,
1688: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1689: #ifdef __no_idea__
1.73 atatat 1690: sysctl_createv(clog, 0, NULL, NULL,
1691: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1692: CTLTYPE_INT, "sourcecheck", NULL,
1693: NULL, 0, &?, 0,
1694: CTL_NET, PF_INET6, IPPROTO_IPV6,
1695: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1696: sysctl_createv(clog, 0, NULL, NULL,
1697: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1698: CTLTYPE_INT, "sourcecheck_logint", NULL,
1699: NULL, 0, &?, 0,
1700: CTL_NET, PF_INET6, IPPROTO_IPV6,
1701: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1702: #endif
1.73 atatat 1703: sysctl_createv(clog, 0, NULL, NULL,
1704: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1705: CTLTYPE_INT, "accept_rtadv",
1706: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1707: NULL, 0, &ip6_accept_rtadv, 0,
1708: CTL_NET, PF_INET6, IPPROTO_IPV6,
1709: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1710: sysctl_createv(clog, 0, NULL, NULL,
1711: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1712: CTLTYPE_INT, "rtadv_maxroutes",
1713: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1714: NULL, 0, &ip6_rtadv_maxroutes, 0,
1715: CTL_NET, PF_INET6, IPPROTO_IPV6,
1716: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1717: sysctl_createv(clog, 0, NULL, NULL,
1718: CTLFLAG_PERMANENT,
1719: CTLTYPE_INT, "rtadv_numroutes",
1720: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1721: NULL, 0, &nd6_numroutes, 0,
1722: CTL_NET, PF_INET6, IPPROTO_IPV6,
1723: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1724: sysctl_createv(clog, 0, NULL, NULL,
1725: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1726: CTLTYPE_INT, "keepfaith",
1727: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1728: NULL, 0, &ip6_keepfaith, 0,
1729: CTL_NET, PF_INET6, IPPROTO_IPV6,
1730: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1731: sysctl_createv(clog, 0, NULL, NULL,
1732: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1733: CTLTYPE_INT, "log_interval",
1734: SYSCTL_DESCR("Minumum interval between logging "
1735: "unroutable packets"),
1.70 atatat 1736: NULL, 0, &ip6_log_interval, 0,
1737: CTL_NET, PF_INET6, IPPROTO_IPV6,
1738: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1739: sysctl_createv(clog, 0, NULL, NULL,
1740: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1741: CTLTYPE_INT, "hdrnestlimit",
1742: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1743: NULL, 0, &ip6_hdrnestlimit, 0,
1744: CTL_NET, PF_INET6, IPPROTO_IPV6,
1745: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1746: sysctl_createv(clog, 0, NULL, NULL,
1747: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1748: CTLTYPE_INT, "dad_count",
1749: SYSCTL_DESCR("Number of Duplicate Address Detection "
1750: "probes to send"),
1.70 atatat 1751: NULL, 0, &ip6_dad_count, 0,
1752: CTL_NET, PF_INET6, IPPROTO_IPV6,
1753: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1754: sysctl_createv(clog, 0, NULL, NULL,
1755: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1756: CTLTYPE_INT, "auto_flowlabel",
1757: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1758: NULL, 0, &ip6_auto_flowlabel, 0,
1759: CTL_NET, PF_INET6, IPPROTO_IPV6,
1760: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1761: sysctl_createv(clog, 0, NULL, NULL,
1762: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1763: CTLTYPE_INT, "defmcasthlim",
1764: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1765: NULL, 0, &ip6_defmcasthlim, 0,
1766: CTL_NET, PF_INET6, IPPROTO_IPV6,
1767: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.73 atatat 1768: sysctl_createv(clog, 0, NULL, NULL,
1769: CTLFLAG_PERMANENT,
1.74 atatat 1770: CTLTYPE_STRING, "kame_version",
1771: SYSCTL_DESCR("KAME Version"),
1.78 christos 1772: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1773: CTL_NET, PF_INET6, IPPROTO_IPV6,
1774: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1775: sysctl_createv(clog, 0, NULL, NULL,
1776: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1777: CTLTYPE_INT, "use_deprecated",
1778: SYSCTL_DESCR("Allow use of deprecated addresses as "
1779: "source addresses"),
1.70 atatat 1780: NULL, 0, &ip6_use_deprecated, 0,
1781: CTL_NET, PF_INET6, IPPROTO_IPV6,
1782: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1783: sysctl_createv(clog, 0, NULL, NULL,
1784: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1785: CTLTYPE_INT, "rr_prune", NULL,
1786: NULL, 0, &ip6_rr_prune, 0,
1787: CTL_NET, PF_INET6, IPPROTO_IPV6,
1788: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1789: sysctl_createv(clog, 0, NULL, NULL,
1790: CTLFLAG_PERMANENT
1.70 atatat 1791: #ifndef INET6_BINDV6ONLY
1.73 atatat 1792: |CTLFLAG_READWRITE,
1.70 atatat 1793: #endif
1.74 atatat 1794: CTLTYPE_INT, "v6only",
1795: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1796: "to PF_INET sockets"),
1.70 atatat 1797: NULL, 0, &ip6_v6only, 0,
1798: CTL_NET, PF_INET6, IPPROTO_IPV6,
1799: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1800: sysctl_createv(clog, 0, NULL, NULL,
1801: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1802: CTLTYPE_INT, "anonportmin",
1803: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1804: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1805: CTL_NET, PF_INET6, IPPROTO_IPV6,
1806: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1807: sysctl_createv(clog, 0, NULL, NULL,
1808: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1809: CTLTYPE_INT, "anonportmax",
1810: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1811: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1812: CTL_NET, PF_INET6, IPPROTO_IPV6,
1813: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1814: #ifndef IPNOPRIVPORTS
1.73 atatat 1815: sysctl_createv(clog, 0, NULL, NULL,
1816: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1817: CTLTYPE_INT, "lowportmin",
1818: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1819: "to assign"),
1.70 atatat 1820: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1821: CTL_NET, PF_INET6, IPPROTO_IPV6,
1822: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1823: sysctl_createv(clog, 0, NULL, NULL,
1824: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1825: CTLTYPE_INT, "lowportmax",
1826: SYSCTL_DESCR("Highest privileged ephemeral port number "
1827: "to assign"),
1.70 atatat 1828: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1829: CTL_NET, PF_INET6, IPPROTO_IPV6,
1830: IPV6CTL_LOWPORTMAX, CTL_EOL);
1831: #endif /* IPNOPRIVPORTS */
1.73 atatat 1832: sysctl_createv(clog, 0, NULL, NULL,
1833: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.149.4.3 skrll 1834: CTLTYPE_INT, "auto_linklocal",
1835: SYSCTL_DESCR("Default value of per-interface flag for "
1836: "adding an IPv6 link-local address to "
1837: "interfaces when attached"),
1838: NULL, 0, &ip6_auto_linklocal, 0,
1839: CTL_NET, PF_INET6, IPPROTO_IPV6,
1840: IPV6CTL_AUTO_LINKLOCAL, CTL_EOL);
1841: sysctl_createv(clog, 0, NULL, NULL,
1842: CTLFLAG_PERMANENT|CTLFLAG_READONLY,
1843: CTLTYPE_STRUCT, "addctlpolicy",
1844: SYSCTL_DESCR("Return the current address control"
1845: " policy"),
1846: sysctl_net_inet6_addrctlpolicy, 0, NULL, 0,
1847: CTL_NET, PF_INET6, IPPROTO_IPV6,
1848: IPV6CTL_ADDRCTLPOLICY, CTL_EOL);
1849: sysctl_createv(clog, 0, NULL, NULL,
1850: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1851: CTLTYPE_INT, "use_tempaddr",
1852: SYSCTL_DESCR("Use temporary address"),
1853: NULL, 0, &ip6_use_tempaddr, 0,
1854: CTL_NET, PF_INET6, IPPROTO_IPV6,
1855: CTL_CREATE, CTL_EOL);
1856: sysctl_createv(clog, 0, NULL, NULL,
1857: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.149.4.1 skrll 1858: CTLTYPE_INT, "prefer_tempaddr",
1859: SYSCTL_DESCR("Prefer temporary address as source "
1860: "address"),
1861: NULL, 0, &ip6_prefer_tempaddr, 0,
1862: CTL_NET, PF_INET6, IPPROTO_IPV6,
1863: CTL_CREATE, CTL_EOL);
1864: sysctl_createv(clog, 0, NULL, NULL,
1865: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1866: CTLTYPE_INT, "temppltime",
1867: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1868: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1869: CTL_NET, PF_INET6, IPPROTO_IPV6,
1870: CTL_CREATE, CTL_EOL);
1871: sysctl_createv(clog, 0, NULL, NULL,
1872: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1873: CTLTYPE_INT, "tempvltime",
1874: SYSCTL_DESCR("valid lifetime of a temporary address"),
1875: NULL, 0, &ip6_temp_valid_lifetime, 0,
1876: CTL_NET, PF_INET6, IPPROTO_IPV6,
1877: CTL_CREATE, CTL_EOL);
1878: sysctl_createv(clog, 0, NULL, NULL,
1879: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1880: CTLTYPE_INT, "maxfrags",
1881: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1882: NULL, 0, &ip6_maxfrags, 0,
1883: CTL_NET, PF_INET6, IPPROTO_IPV6,
1884: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1885: sysctl_createv(clog, 0, NULL, NULL,
1886: CTLFLAG_PERMANENT,
1887: CTLTYPE_STRUCT, "stats",
1888: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1889: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1890: CTL_NET, PF_INET6, IPPROTO_IPV6,
1891: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1892: sysctl_createv(clog, 0, NULL, NULL,
1893: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1894: CTLTYPE_INT, "use_defaultzone",
1895: SYSCTL_DESCR("Whether to use the default scope zones"),
1896: NULL, 0, &ip6_use_defzone, 0,
1897: CTL_NET, PF_INET6, IPPROTO_IPV6,
1898: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1899: sysctl_createv(clog, 0, NULL, NULL,
1900: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1901: CTLTYPE_INT, "mcast_pmtu",
1902: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1903: NULL, 0, &ip6_mcast_pmtu, 0,
1904: CTL_NET, PF_INET6, IPPROTO_IPV6,
1905: CTL_CREATE, CTL_EOL);
1.149.4.2 skrll 1906: #ifdef GATEWAY
1.98 liamjfoy 1907: sysctl_createv(clog, 0, NULL, NULL,
1908: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1909: CTLTYPE_INT, "maxflows",
1910: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.101 liamjfoy 1911: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1912: CTL_NET, PF_INET6, IPPROTO_IPV6,
1913: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1914: sysctl_createv(clog, 0, NULL, NULL,
1915: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1916: CTLTYPE_INT, "hashsize",
1917: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1918: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1919: CTL_NET, PF_INET6, IPPROTO_IPV6,
1920: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1921: #endif
1.138 christos 1922: /* anonportalgo RFC6056 subtree */
1.140 christos 1923: const struct sysctlnode *portalgo_node;
1924: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1925: CTLFLAG_PERMANENT,
1926: CTLTYPE_NODE, "anonportalgo",
1927: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1928: NULL, 0, NULL, 0,
1929: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1930: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1931: CTLFLAG_PERMANENT,
1932: CTLTYPE_STRING, "available",
1933: SYSCTL_DESCR("available algorithms"),
1.140 christos 1934: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1935: CTL_CREATE, CTL_EOL);
1.140 christos 1936: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1937: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1938: CTLTYPE_STRING, "selected",
1939: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1940: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1941: CTL_CREATE, CTL_EOL);
1.141 christos 1942: sysctl_createv(clog, 0, &portalgo_node, NULL,
1943: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1944: CTLTYPE_STRUCT, "reserve",
1945: SYSCTL_DESCR("bitmap of reserved ports"),
1946: sysctl_portalgo_reserve6, 0, NULL, 0,
1947: CTL_CREATE, CTL_EOL);
1.139 christos 1948: sysctl_createv(clog, 0, NULL, NULL,
1949: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1950: CTLTYPE_INT, "neighborgcthresh",
1951: SYSCTL_DESCR("Maximum number of entries in neighbor"
1952: " cache"),
1953: NULL, 1, &ip6_neighborgcthresh, 0,
1954: CTL_NET, PF_INET6, IPPROTO_IPV6,
1955: CTL_CREATE, CTL_EOL);
1956: sysctl_createv(clog, 0, NULL, NULL,
1957: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1958: CTLTYPE_INT, "maxifprefixes",
1959: SYSCTL_DESCR("Maximum number of prefixes created by"
1960: " route advertisement per interface"),
1961: NULL, 1, &ip6_maxifprefixes, 0,
1962: CTL_NET, PF_INET6, IPPROTO_IPV6,
1963: CTL_CREATE, CTL_EOL);
1964: sysctl_createv(clog, 0, NULL, NULL,
1965: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1966: CTLTYPE_INT, "maxifdefrouters",
1967: SYSCTL_DESCR("Maximum number of default routers created"
1968: " by route advertisement per interface"),
1969: NULL, 1, &ip6_maxifdefrouters, 0,
1970: CTL_NET, PF_INET6, IPPROTO_IPV6,
1971: CTL_CREATE, CTL_EOL);
1972: sysctl_createv(clog, 0, NULL, NULL,
1973: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1974: CTLTYPE_INT, "maxdynroutes",
1975: SYSCTL_DESCR("Maximum number of routes created via"
1976: " redirect"),
1977: NULL, 1, &ip6_maxdynroutes, 0,
1978: CTL_NET, PF_INET6, IPPROTO_IPV6,
1979: CTL_CREATE, CTL_EOL);
1.2 itojun 1980: }
1.116 thorpej 1981:
1982: void
1983: ip6_statinc(u_int stat)
1984: {
1985:
1986: KASSERT(stat < IP6_NSTATS);
1987: IP6_STATINC(stat);
1988: }
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