Annotation of src/sys/netinet6/ip6_input.c, Revision 1.142.2.2
1.142.2.2! rmind 1: /* $NetBSD: ip6_input.c,v 1.142.2.1 2013/08/28 23:59:36 rmind 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>
1.142.2.2! rmind 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.142.2.1 2013/08/28 23:59:36 rmind Exp $");
1.2 itojun 66:
1.129 joerg 67: #include "opt_gateway.h"
1.2 itojun 68: #include "opt_inet.h"
1.85 rpaulo 69: #include "opt_inet6.h"
1.4 thorpej 70: #include "opt_ipsec.h"
1.123 christos 71: #include "opt_compat_netbsd.h"
1.2 itojun 72:
73: #include <sys/param.h>
74: #include <sys/systm.h>
75: #include <sys/malloc.h>
76: #include <sys/mbuf.h>
77: #include <sys/domain.h>
78: #include <sys/protosw.h>
79: #include <sys/socket.h>
80: #include <sys/socketvar.h>
81: #include <sys/errno.h>
82: #include <sys/time.h>
83: #include <sys/kernel.h>
84: #include <sys/syslog.h>
85: #include <sys/proc.h>
1.46 simonb 86: #include <sys/sysctl.h>
1.133 tls 87: #include <sys/cprng.h>
1.2 itojun 88:
89: #include <net/if.h>
90: #include <net/if_types.h>
91: #include <net/if_dl.h>
92: #include <net/route.h>
93: #include <net/netisr.h>
1.15 darrenr 94: #include <net/pfil.h>
1.2 itojun 95:
96: #include <netinet/in.h>
1.9 itojun 97: #include <netinet/in_systm.h>
98: #ifdef INET
99: #include <netinet/ip.h>
100: #include <netinet/ip_icmp.h>
1.45 itojun 101: #endif /* INET */
1.14 itojun 102: #include <netinet/ip6.h>
1.140 christos 103: #include <netinet/portalgo.h>
1.2 itojun 104: #include <netinet6/in6_var.h>
1.11 itojun 105: #include <netinet6/ip6_var.h>
1.116 thorpej 106: #include <netinet6/ip6_private.h>
1.2 itojun 107: #include <netinet6/in6_pcb.h>
1.14 itojun 108: #include <netinet/icmp6.h>
1.81 rpaulo 109: #include <netinet6/scope6_var.h>
1.2 itojun 110: #include <netinet6/in6_ifattach.h>
111: #include <netinet6/nd6.h>
112:
1.142 christos 113: #ifdef IPSEC
1.94 degroote 114: #include <netipsec/ipsec.h>
115: #include <netipsec/ipsec6.h>
116: #include <netipsec/key.h>
1.142 christos 117: #endif /* IPSEC */
1.94 degroote 118:
1.123 christos 119: #ifdef COMPAT_50
120: #include <compat/sys/time.h>
121: #include <compat/sys/socket.h>
122: #endif
123:
1.2 itojun 124: #include <netinet6/ip6protosw.h>
125:
126: #include "faith.h"
127: #include "gif.h"
1.50 itojun 128:
129: #if NGIF > 0
130: #include <netinet6/in6_gif.h>
131: #endif
1.2 itojun 132:
1.9 itojun 133: #include <net/net_osdep.h>
134:
1.2 itojun 135: extern struct domain inet6domain;
136:
137: u_char ip6_protox[IPPROTO_MAX];
138: static int ip6qmaxlen = IFQ_MAXLEN;
139: struct in6_ifaddr *in6_ifaddr;
140: struct ifqueue ip6intrq;
141:
1.108 ad 142: extern callout_t in6_tmpaddrtimer_ch;
1.83 rpaulo 143:
1.2 itojun 144: int ip6_forward_srcrt; /* XXX */
145: int ip6_sourcecheck; /* XXX */
146: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 147:
1.142.2.1 rmind 148: pfil_head_t *inet6_pfil_hook;
1.29 thorpej 149:
1.116 thorpej 150: percpu_t *ip6stat_percpu;
1.2 itojun 151:
1.111 dyoung 152: static void ip6_init2(void *);
1.112 dyoung 153: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 154:
1.136 drochner 155: static int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
156: u_int32_t *);
1.111 dyoung 157: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.128 pooka 158: static void sysctl_net_inet6_ip6_setup(struct sysctllog **);
1.2 itojun 159:
160: /*
161: * IP6 initialization: fill in IP6 protocol switch table.
162: * All protocols not implemented in kernel go to raw IP6 protocol handler.
163: */
164: void
1.114 matt 165: ip6_init(void)
1.2 itojun 166: {
1.78 christos 167: const struct ip6protosw *pr;
1.35 itojun 168: int i;
1.2 itojun 169:
1.128 pooka 170: sysctl_net_inet6_ip6_setup(NULL);
1.78 christos 171: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 172: if (pr == 0)
173: panic("ip6_init");
174: for (i = 0; i < IPPROTO_MAX; i++)
175: ip6_protox[i] = pr - inet6sw;
1.78 christos 176: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
177: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 178: if (pr->pr_domain->dom_family == PF_INET6 &&
179: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
180: ip6_protox[pr->pr_protocol] = pr - inet6sw;
181: ip6intrq.ifq_maxlen = ip6qmaxlen;
1.81 rpaulo 182: scope6_init();
183: addrsel_policy_init();
1.2 itojun 184: nd6_init();
185: frag6_init();
1.133 tls 186: ip6_desync_factor = cprng_fast32() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 187:
1.135 christos 188: ip6_init2(NULL);
1.98 liamjfoy 189: #ifdef GATEWAY
1.99 liamjfoy 190: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 191: #endif
1.29 thorpej 192: /* Register our Packet Filter hook. */
1.142.2.1 rmind 193: inet6_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET6);
194: KASSERT(inet6_pfil_hook != NULL);
1.116 thorpej 195:
196: ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS);
1.2 itojun 197: }
198:
199: static void
1.90 christos 200: ip6_init2(void *dummy)
1.2 itojun 201: {
202:
203: /* nd6_timer_init */
1.118 ad 204: callout_init(&nd6_timer_ch, CALLOUT_MPSAFE);
1.19 thorpej 205: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83 rpaulo 206:
207: /* timer for regeneranation of temporary addresses randomize ID */
1.118 ad 208: callout_init(&in6_tmpaddrtimer_ch, CALLOUT_MPSAFE);
1.83 rpaulo 209: callout_reset(&in6_tmpaddrtimer_ch,
210: (ip6_temp_preferred_lifetime - ip6_desync_factor -
211: ip6_temp_regen_advance) * hz,
212: in6_tmpaddrtimer, NULL);
1.2 itojun 213: }
214:
215: /*
216: * IP6 input interrupt handling. Just pass the packet to ip6_input.
217: */
218: void
1.114 matt 219: ip6intr(void)
1.2 itojun 220: {
221: int s;
222: struct mbuf *m;
223:
1.118 ad 224: mutex_enter(softnet_lock);
225: KERNEL_LOCK(1, NULL);
1.2 itojun 226: for (;;) {
1.41 thorpej 227: s = splnet();
1.2 itojun 228: IF_DEQUEUE(&ip6intrq, m);
229: splx(s);
230: if (m == 0)
1.118 ad 231: break;
1.83 rpaulo 232: /* drop the packet if IPv6 operation is disabled on the IF */
233: if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {
234: m_freem(m);
1.118 ad 235: break;
1.83 rpaulo 236: }
1.2 itojun 237: ip6_input(m);
238: }
1.118 ad 239: KERNEL_UNLOCK_ONE(NULL);
240: mutex_exit(softnet_lock);
1.2 itojun 241: }
242:
1.103 dyoung 243: extern struct route ip6_forward_rt;
1.2 itojun 244:
245: void
1.96 dyoung 246: ip6_input(struct mbuf *m)
1.2 itojun 247: {
1.9 itojun 248: struct ip6_hdr *ip6;
1.105 dyoung 249: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 250: u_int32_t plen;
1.5 itojun 251: u_int32_t rtalert = ~0;
1.104 yamt 252: int nxt, ours = 0, rh_present = 0;
1.9 itojun 253: struct ifnet *deliverifp = NULL;
1.64 itojun 254: int srcrt = 0;
1.105 dyoung 255: const struct rtentry *rt;
256: union {
257: struct sockaddr dst;
258: struct sockaddr_in6 dst6;
259: } u;
1.142 christos 260: #ifdef IPSEC
1.94 degroote 261: struct m_tag *mtag;
262: struct tdb_ident *tdbi;
263: struct secpolicy *sp;
264: int s, error;
265: #endif
1.2 itojun 266:
267: /*
1.81 rpaulo 268: * make sure we don't have onion peering information into m_tag.
269: */
270: ip6_delaux(m);
271:
272: /*
1.44 itojun 273: * mbuf statistics
1.2 itojun 274: */
275: if (m->m_flags & M_EXT) {
276: if (m->m_next)
1.116 thorpej 277: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 278: else
1.116 thorpej 279: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 280: } else {
1.115 thorpej 281: #define M2MMAX 32
1.2 itojun 282: if (m->m_next) {
1.9 itojun 283: if (m->m_flags & M_LOOP) {
1.116 thorpej 284: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.115 thorpej 285: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX) {
1.116 thorpej 286: IP6_STATINC(IP6_STAT_M2M +
287: m->m_pkthdr.rcvif->if_index);
1.115 thorpej 288: } else
1.116 thorpej 289: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 290: } else
1.116 thorpej 291: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 292: #undef M2MMAX
1.2 itojun 293: }
294:
1.9 itojun 295: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
1.116 thorpej 296: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 297:
1.57 thorpej 298: /*
299: * If the IPv6 header is not aligned, slurp it up into a new
300: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 301: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 302: * IPv6 header is in the first mbuf of the chain.
303: */
1.97 christos 304: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 305: struct ifnet *inifp = m->m_pkthdr.rcvif;
306: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
307: (max_linkhdr + 3) & ~3)) == NULL) {
308: /* XXXJRT new stat, please */
1.116 thorpej 309: IP6_STATINC(IP6_STAT_TOOSMALL);
1.57 thorpej 310: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
311: return;
312: }
313: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
314: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 315: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 316: IP6_STATINC(IP6_STAT_TOOSMALL);
1.9 itojun 317: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
318: return;
319: }
1.2 itojun 320: }
321:
322: ip6 = mtod(m, struct ip6_hdr *);
323:
324: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 325: IP6_STATINC(IP6_STAT_BADVERS);
1.9 itojun 326: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 327: goto bad;
328: }
1.15 darrenr 329:
1.98 liamjfoy 330: /*
331: * Assume that we can create a fast-forward IP flow entry
332: * based on this packet.
333: */
334: m->m_flags |= M_CANFASTFWD;
335:
1.15 darrenr 336: /*
337: * Run through list of hooks for input packets. If there are any
338: * filters which require that additional packets in the flow are
339: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
340: * Note that filters must _never_ set this flag, as another filter
341: * in the list may have previously cleared it.
342: */
1.39 itojun 343: /*
344: * let ipfilter look at packet on the wire,
345: * not the decapsulated packet.
346: */
1.142 christos 347: #if defined(IPSEC)
1.94 degroote 348: if (!ipsec_indone(m))
1.39 itojun 349: #else
350: if (1)
351: #endif
352: {
1.64 itojun 353: struct in6_addr odst;
354:
355: odst = ip6->ip6_dst;
1.142.2.1 rmind 356: if (pfil_run_hooks(inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
1.39 itojun 357: PFIL_IN) != 0)
358: return;
359: if (m == NULL)
360: return;
361: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 362: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 363: }
1.15 darrenr 364:
1.116 thorpej 365: IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt);
1.2 itojun 366:
1.30 thorpej 367: #ifdef ALTQ
368: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
369: /* packet is dropped by traffic conditioner */
370: return;
1.9 itojun 371: }
372: #endif
373:
1.2 itojun 374: /*
1.44 itojun 375: * Check against address spoofing/corruption.
1.2 itojun 376: */
377: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
378: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 379: /*
380: * XXX: "badscope" is not very suitable for a multicast source.
381: */
1.116 thorpej 382: IP6_STATINC(IP6_STAT_BADSCOPE);
1.9 itojun 383: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 384: goto bad;
385: }
1.13 itojun 386: /*
1.44 itojun 387: * The following check is not documented in specs. A malicious
388: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
389: * and bypass security checks (act as if it was from 127.0.0.1 by using
390: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 391: *
1.44 itojun 392: * This check chokes if we are in an SIIT cloud. As none of BSDs
393: * support IPv4-less kernel compilation, we cannot support SIIT
394: * environment at all. So, it makes more sense for us to reject any
395: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 396: * partial support for SIIT environment.
1.13 itojun 397: */
398: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
399: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 400: IP6_STATINC(IP6_STAT_BADSCOPE);
1.13 itojun 401: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
402: goto bad;
403: }
1.17 itojun 404: #if 0
1.13 itojun 405: /*
1.17 itojun 406: * Reject packets with IPv4 compatible addresses (auto tunnel).
407: *
408: * The code forbids auto tunnel relay case in RFC1933 (the check is
409: * stronger than RFC1933). We may want to re-enable it if mech-xx
410: * is revised to forbid relaying case.
1.13 itojun 411: */
412: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
413: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
1.116 thorpej 414: IP6_STATINC(IP6_STAT_BADSCOPE);
1.13 itojun 415: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
416: goto bad;
417: }
418: #endif
1.35 itojun 419:
1.2 itojun 420: /*
1.82 yamt 421: * Disambiguate address scope zones (if there is ambiguity).
422: * We first make sure that the original source or destination address
423: * is not in our internal form for scoped addresses. Such addresses
424: * are not necessarily invalid spec-wise, but we cannot accept them due
425: * to the usage conflict.
426: * in6_setscope() then also checks and rejects the cases where src or
427: * dst are the loopback address and the receiving interface
428: * is not loopback.
429: */
1.88 bouyer 430: if (__predict_false(
431: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
432: goto bad;
433: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 434: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 435: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 436: goto bad;
437: }
438: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
439: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
1.116 thorpej 440: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 441: goto bad;
442: }
443:
444: /*
1.2 itojun 445: * Multicast check
446: */
447: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
448: struct in6_multi *in6m = 0;
1.9 itojun 449:
450: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 451: /*
452: * See if we belong to the destination multicast group on the
453: * arrival interface.
454: */
455: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
456: if (in6m)
457: ours = 1;
458: else if (!ip6_mrouter) {
1.116 thorpej 459: uint64_t *ip6s = IP6_STAT_GETREF();
460: ip6s[IP6_STAT_NOTMEMBER]++;
461: ip6s[IP6_STAT_CANTFORWARD]++;
462: IP6_STAT_PUTREF();
1.9 itojun 463: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 464: goto bad;
465: }
1.9 itojun 466: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 467: goto hbhcheck;
468: }
469:
1.105 dyoung 470: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
471:
1.2 itojun 472: /*
473: * Unicast check
474: */
1.105 dyoung 475: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
476: if (hit)
1.116 thorpej 477: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 478: else
1.116 thorpej 479: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 480:
1.109 dyoung 481: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 482:
483: /*
484: * Accept the packet if the forwarding interface to the destination
485: * according to the routing table is the loopback interface,
486: * unless the associated route has a gateway.
487: * Note that this approach causes to accept a packet if there is a
488: * route to the loopback interface for the destination of the packet.
489: * But we think it's even useful in some situations, e.g. when using
490: * a special daemon which wants to intercept the packet.
491: */
1.105 dyoung 492: if (rt != NULL &&
493: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
494: !(rt->rt_flags & RTF_CLONED) &&
1.2 itojun 495: #if 0
496: /*
497: * The check below is redundant since the comparison of
498: * the destination and the key of the rtentry has
499: * already done through looking up the routing table.
500: */
1.109 dyoung 501: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 502: #endif
1.105 dyoung 503: rt->rt_ifp->if_type == IFT_LOOP) {
504: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 505: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
506: m->m_flags |= M_ANYCAST6;
1.24 itojun 507: /*
508: * packets to a tentative, duplicated, or somehow invalid
509: * address must not be accepted.
510: */
1.2 itojun 511: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 512: /* this address is ready */
1.2 itojun 513: ours = 1;
1.9 itojun 514: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 515: goto hbhcheck;
516: } else {
1.24 itojun 517: /* address is not ready, so discard the packet. */
1.34 itojun 518: nd6log((LOG_INFO,
1.27 itojun 519: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 520: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 521: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 522:
523: goto bad;
1.2 itojun 524: }
525: }
526:
527: /*
1.55 itojun 528: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 529: */
530: #if defined(NFAITH) && 0 < NFAITH
531: if (ip6_keepfaith) {
1.105 dyoung 532: if (rt != NULL && rt->rt_ifp != NULL &&
533: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 534: /* XXX do we need more sanity checks? */
535: ours = 1;
1.105 dyoung 536: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 537: goto hbhcheck;
538: }
539: }
540: #endif
541:
542: #if 0
543: {
544: /*
545: * Last resort: check in6_ifaddr for incoming interface.
546: * The code is here until I update the "goto ours hack" code above
547: * working right.
548: */
549: struct ifaddr *ifa;
1.113 dyoung 550: IFADDR_FOREACH(ifa, m->m_pkthdr.rcvif) {
1.9 itojun 551: if (ifa->ifa_addr == NULL)
552: continue; /* just for safety */
553: if (ifa->ifa_addr->sa_family != AF_INET6)
554: continue;
555: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
556: ours = 1;
557: deliverifp = ifa->ifa_ifp;
1.2 itojun 558: goto hbhcheck;
559: }
560: }
1.9 itojun 561: }
1.2 itojun 562: #endif
563:
564: /*
565: * Now there is no reason to process the packet if it's not our own
566: * and we're not a router.
567: */
568: if (!ip6_forwarding) {
1.116 thorpej 569: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.9 itojun 570: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 571: goto bad;
572: }
573:
574: hbhcheck:
575: /*
1.81 rpaulo 576: * record address information into m_tag, if we don't have one yet.
577: * note that we are unable to record it, if the address is not listed
578: * as our interface address (e.g. multicast addresses, addresses
579: * within FAITH prefixes and such).
580: */
1.111 dyoung 581: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 582: struct in6_ifaddr *ia6;
583:
584: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.111 dyoung 585: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
586: /*
587: * XXX maybe we should drop the packet here,
588: * as we could not provide enough information
589: * to the upper layers.
590: */
1.81 rpaulo 591: }
592: }
593:
594: /*
1.2 itojun 595: * Process Hop-by-Hop options header if it's contained.
596: * m may be modified in ip6_hopopts_input().
597: * If a JumboPayload option is included, plen will also be modified.
598: */
599: plen = (u_int32_t)ntohs(ip6->ip6_plen);
600: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 601: struct ip6_hbh *hbh;
602:
603: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
604: #if 0 /*touches NULL pointer*/
605: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
606: #endif
1.2 itojun 607: return; /* m have already been freed */
1.9 itojun 608: }
1.22 itojun 609:
1.2 itojun 610: /* adjust pointer */
611: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 612:
613: /*
1.49 itojun 614: * if the payload length field is 0 and the next header field
1.22 itojun 615: * indicates Hop-by-Hop Options header, then a Jumbo Payload
616: * option MUST be included.
617: */
618: if (ip6->ip6_plen == 0 && plen == 0) {
619: /*
620: * Note that if a valid jumbo payload option is
1.83 rpaulo 621: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 622: * (non-zero) payload length to the variable plen.
1.22 itojun 623: */
1.116 thorpej 624: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 625: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
626: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
627: icmp6_error(m, ICMP6_PARAM_PROB,
628: ICMP6_PARAMPROB_HEADER,
1.97 christos 629: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 630: return;
631: }
1.9 itojun 632: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
633: sizeof(struct ip6_hbh));
634: if (hbh == NULL) {
1.116 thorpej 635: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 636: return;
637: }
1.57 thorpej 638: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 639: nxt = hbh->ip6h_nxt;
1.2 itojun 640:
641: /*
642: * accept the packet if a router alert option is included
643: * and we act as an IPv6 router.
644: */
1.5 itojun 645: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 646: ours = 1;
647: } else
648: nxt = ip6->ip6_nxt;
649:
650: /*
651: * Check that the amount of data in the buffers
652: * is as at least much as the IPv6 header would have us expect.
653: * Trim mbufs if longer than we expect.
654: * Drop packet if shorter than we expect.
655: */
656: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 657: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 658: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 659: goto bad;
660: }
661: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
662: if (m->m_len == m->m_pkthdr.len) {
663: m->m_len = sizeof(struct ip6_hdr) + plen;
664: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
665: } else
666: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
667: }
668:
669: /*
670: * Forward if desirable.
671: */
672: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
673: /*
674: * If we are acting as a multicast router, all
675: * incoming multicast packets are passed to the
676: * kernel-level multicast forwarding function.
677: * The packet is returned (relatively) intact; if
678: * ip6_mforward() returns a non-zero value, the packet
679: * must be discarded, else it may be accepted below.
680: */
681: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
1.116 thorpej 682: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.2 itojun 683: m_freem(m);
684: return;
685: }
686: if (!ours) {
687: m_freem(m);
688: return;
689: }
1.22 itojun 690: } else if (!ours) {
1.64 itojun 691: ip6_forward(m, srcrt);
1.2 itojun 692: return;
1.56 itojun 693: }
1.25 itojun 694:
695: ip6 = mtod(m, struct ip6_hdr *);
696:
697: /*
698: * Malicious party may be able to use IPv4 mapped addr to confuse
699: * tcp/udp stack and bypass security checks (act as if it was from
700: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
701: *
702: * For SIIT end node behavior, you may want to disable the check.
703: * However, you will become vulnerable to attacks using IPv4 mapped
704: * source.
705: */
706: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
707: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 708: IP6_STATINC(IP6_STAT_BADSCOPE);
1.25 itojun 709: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
710: goto bad;
711: }
1.2 itojun 712:
713: /*
714: * Tell launch routine the next header
715: */
1.12 itojun 716: #ifdef IFA_STATS
1.28 itojun 717: if (deliverifp != NULL) {
1.9 itojun 718: struct in6_ifaddr *ia6;
719: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
720: if (ia6)
721: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
722: }
723: #endif
1.116 thorpej 724: IP6_STATINC(IP6_STAT_DELIVERED);
1.9 itojun 725: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 726: nest = 0;
1.40 itojun 727:
1.104 yamt 728: rh_present = 0;
1.2 itojun 729: while (nxt != IPPROTO_DONE) {
730: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.116 thorpej 731: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.104 yamt 732: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 733: goto bad;
734: }
1.8 itojun 735:
736: /*
737: * protection against faulty packet - there should be
738: * more sanity checks in header chain processing.
739: */
740: if (m->m_pkthdr.len < off) {
1.116 thorpej 741: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 742: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 743: goto bad;
744: }
745:
1.104 yamt 746: if (nxt == IPPROTO_ROUTING) {
747: if (rh_present++) {
748: in6_ifstat_inc(m->m_pkthdr.rcvif,
749: ifs6_in_hdrerr);
1.116 thorpej 750: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 751: goto bad;
752: }
753: }
754:
1.142 christos 755: #ifdef IPSEC
1.94 degroote 756: /*
757: * enforce IPsec policy checking if we are seeing last header.
758: * note that we do not visit this with protocols with pcb layer
759: * code - like udp/tcp/raw ip.
760: */
761: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
762: /*
763: * Check if the packet has already had IPsec processing
764: * done. If so, then just pass it along. This tag gets
765: * set during AH, ESP, etc. input handling, before the
766: * packet is returned to the ip input queue for delivery.
767: */
768: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
769: s = splsoftnet();
770: if (mtag != NULL) {
771: tdbi = (struct tdb_ident *)(mtag + 1);
772: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
773: } else {
774: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
775: IP_FORWARDING, &error);
776: }
777: if (sp != NULL) {
778: /*
779: * Check security policy against packet attributes.
780: */
781: error = ipsec_in_reject(sp, m);
782: KEY_FREESP(&sp);
783: } else {
784: /* XXX error stat??? */
785: error = EINVAL;
786: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
787: }
788: splx(s);
789: if (error)
790: goto bad;
791: }
1.142 christos 792: #endif /* IPSEC */
1.94 degroote 793:
1.56 itojun 794:
1.2 itojun 795: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
796: }
797: return;
798: bad:
799: m_freem(m);
800: }
801:
802: /*
1.81 rpaulo 803: * set/grab in6_ifaddr correspond to IPv6 destination address.
804: */
805: static struct m_tag *
1.112 dyoung 806: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 807: {
808: struct m_tag *mtag;
1.142.2.2! rmind 809: struct ip6aux *ip6a;
1.81 rpaulo 810:
811: mtag = ip6_addaux(m);
1.142.2.2! rmind 812: if (mtag == NULL)
! 813: return NULL;
1.112 dyoung 814:
1.142.2.2! rmind 815: ip6a = (struct ip6aux *)(mtag + 1);
! 816: if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) {
! 817: IP6_STATINC(IP6_STAT_BADSCOPE);
! 818: return NULL;
1.112 dyoung 819: }
1.142.2.2! rmind 820:
! 821: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
! 822: ip6a->ip6a_flags = ia->ia6_flags;
! 823: return mtag;
1.81 rpaulo 824: }
825:
1.112 dyoung 826: const struct ip6aux *
1.107 christos 827: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 828: {
829: struct m_tag *mtag;
830:
831: mtag = ip6_findaux(m);
1.112 dyoung 832: if (mtag != NULL)
833: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 834: else
835: return NULL;
836: }
837:
838: /*
1.2 itojun 839: * Hop-by-Hop options header processing. If a valid jumbo payload option is
840: * included, the real payload length will be stored in plenp.
1.107 christos 841: *
842: * rtalertp - XXX: should be stored more smart way
1.2 itojun 843: */
1.136 drochner 844: int
1.107 christos 845: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
846: struct mbuf **mp, int *offp)
1.2 itojun 847: {
1.35 itojun 848: struct mbuf *m = *mp;
1.2 itojun 849: int off = *offp, hbhlen;
850: struct ip6_hbh *hbh;
851:
852: /* validation of the length of the header */
1.9 itojun 853: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
854: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
855: if (hbh == NULL) {
1.116 thorpej 856: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 857: return -1;
858: }
859: hbhlen = (hbh->ip6h_len + 1) << 3;
860: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
861: hbhlen);
862: if (hbh == NULL) {
1.116 thorpej 863: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 864: return -1;
865: }
1.57 thorpej 866: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 867: off += hbhlen;
868: hbhlen -= sizeof(struct ip6_hbh);
869:
870: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
871: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 872: return (-1);
1.2 itojun 873:
874: *offp = off;
875: *mp = m;
1.58 itojun 876: return (0);
1.2 itojun 877: }
878:
879: /*
880: * Search header for all Hop-by-hop options and process each option.
881: * This function is separate from ip6_hopopts_input() in order to
882: * handle a case where the sending node itself process its hop-by-hop
883: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 884: *
885: * The function assumes that hbh header is located right after the IPv6 header
886: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
887: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 888: */
1.136 drochner 889: static int
1.107 christos 890: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
891: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 892: {
893: struct ip6_hdr *ip6;
894: int optlen = 0;
895: u_int8_t *opt = opthead;
896: u_int16_t rtalert_val;
1.22 itojun 897: u_int32_t jumboplen;
1.55 itojun 898: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 899:
900: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 901: switch (*opt) {
902: case IP6OPT_PAD1:
903: optlen = 1;
904: break;
905: case IP6OPT_PADN:
906: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 907: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 908: goto bad;
909: }
910: optlen = *(opt + 1) + 2;
911: break;
912: case IP6OPT_RTALERT:
913: /* XXX may need check for alignment */
914: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 915: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 916: goto bad;
917: }
918: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 919: /* XXX stat */
920: icmp6_error(m, ICMP6_PARAM_PROB,
921: ICMP6_PARAMPROB_HEADER,
922: erroff + opt + 1 - opthead);
923: return (-1);
1.35 itojun 924: }
925: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 926: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 927: *rtalertp = ntohs(rtalert_val);
928: break;
929: case IP6OPT_JUMBO:
1.22 itojun 930: /* XXX may need check for alignment */
931: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 932: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 933: goto bad;
934: }
1.35 itojun 935: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 936: /* XXX stat */
937: icmp6_error(m, ICMP6_PARAM_PROB,
938: ICMP6_PARAMPROB_HEADER,
939: erroff + opt + 1 - opthead);
940: return (-1);
1.35 itojun 941: }
1.22 itojun 942: optlen = IP6OPT_JUMBO_LEN;
943:
944: /*
945: * IPv6 packets that have non 0 payload length
1.35 itojun 946: * must not contain a jumbo payload option.
1.22 itojun 947: */
948: ip6 = mtod(m, struct ip6_hdr *);
949: if (ip6->ip6_plen) {
1.116 thorpej 950: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 951: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 952: ICMP6_PARAMPROB_HEADER,
953: erroff + opt - opthead);
954: return (-1);
1.22 itojun 955: }
1.2 itojun 956:
1.22 itojun 957: /*
958: * We may see jumbolen in unaligned location, so
959: * we'd need to perform bcopy().
960: */
1.126 tsutsui 961: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 962: jumboplen = (u_int32_t)htonl(jumboplen);
963:
964: #if 1
965: /*
966: * if there are multiple jumbo payload options,
967: * *plenp will be non-zero and the packet will be
968: * rejected.
969: * the behavior may need some debate in ipngwg -
970: * multiple options does not make sense, however,
971: * there's no explicit mention in specification.
972: */
973: if (*plenp != 0) {
1.116 thorpej 974: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 975: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 976: ICMP6_PARAMPROB_HEADER,
977: erroff + opt + 2 - opthead);
978: return (-1);
1.22 itojun 979: }
1.8 itojun 980: #endif
1.2 itojun 981:
1.22 itojun 982: /*
983: * jumbo payload length must be larger than 65535.
984: */
985: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 986: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 987: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 988: ICMP6_PARAMPROB_HEADER,
989: erroff + opt + 2 - opthead);
990: return (-1);
1.22 itojun 991: }
992: *plenp = jumboplen;
993:
994: break;
1.35 itojun 995: default: /* unknown option */
996: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 997: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 998: goto bad;
999: }
1.55 itojun 1000: optlen = ip6_unknown_opt(opt, m,
1001: erroff + opt - opthead);
1002: if (optlen == -1)
1003: return (-1);
1.35 itojun 1004: optlen += 2;
1005: break;
1.2 itojun 1006: }
1007: }
1008:
1.55 itojun 1009: return (0);
1.2 itojun 1010:
1011: bad:
1012: m_freem(m);
1.55 itojun 1013: return (-1);
1.2 itojun 1014: }
1015:
1016: /*
1017: * Unknown option processing.
1018: * The third argument `off' is the offset from the IPv6 header to the option,
1019: * which is necessary if the IPv6 header the and option header and IPv6 header
1020: * is not continuous in order to return an ICMPv6 error.
1021: */
1022: int
1.107 christos 1023: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1024: {
1025: struct ip6_hdr *ip6;
1026:
1.35 itojun 1027: switch (IP6OPT_TYPE(*optp)) {
1028: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1029: return ((int)*(optp + 1));
1.35 itojun 1030: case IP6OPT_TYPE_DISCARD: /* silently discard */
1031: m_freem(m);
1.58 itojun 1032: return (-1);
1.35 itojun 1033: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 1034: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1035: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1036: return (-1);
1.35 itojun 1037: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 1038: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1039: ip6 = mtod(m, struct ip6_hdr *);
1040: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1041: (m->m_flags & (M_BCAST|M_MCAST)))
1042: m_freem(m);
1043: else
1044: icmp6_error(m, ICMP6_PARAM_PROB,
1045: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1046: return (-1);
1.2 itojun 1047: }
1048:
1049: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1050: return (-1);
1.2 itojun 1051: }
1052:
1053: /*
1.9 itojun 1054: * Create the "control" list for this pcb.
1055: *
1056: * The routine will be called from upper layer handlers like tcp6_input().
1057: * Thus the routine assumes that the caller (tcp6_input) have already
1058: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1059: * very first mbuf on the mbuf chain.
1060: * We may want to add some infinite loop prevention or sanity checks for safety.
1061: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1062: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1063: */
1064: void
1.107 christos 1065: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1066: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1067: {
1.85 rpaulo 1068: #ifdef RFC2292
1069: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1070: #else
1071: #define IS2292(x, y) (y)
1072: #endif
1073:
1.123 christos 1074: if (in6p->in6p_socket->so_options & SO_TIMESTAMP
1075: #ifdef SO_OTIMESTAMP
1076: || in6p->in6p_socket->so_options & SO_OTIMESTAMP
1077: #endif
1078: ) {
1.2 itojun 1079: struct timeval tv;
1080:
1081: microtime(&tv);
1.123 christos 1082: #ifdef SO_OTIMESTAMP
1083: if (in6p->in6p_socket->so_options & SO_OTIMESTAMP) {
1084: struct timeval50 tv50;
1085: timeval_to_timeval50(&tv, &tv50);
1086: *mp = sbcreatecontrol((void *) &tv50, sizeof(tv50),
1087: SCM_OTIMESTAMP, SOL_SOCKET);
1088: } else
1089: #endif
1.97 christos 1090: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1091: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1092: if (*mp)
1093: mp = &(*mp)->m_next;
1094: }
1.87 rpaulo 1095:
1096: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1097: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1098: return;
1099:
1.2 itojun 1100: /* RFC 2292 sec. 5 */
1.35 itojun 1101: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1102: struct in6_pktinfo pi6;
1.85 rpaulo 1103:
1.126 tsutsui 1104: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1105: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1106: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1107: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1108: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1109: sizeof(struct in6_pktinfo),
1110: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1111: if (*mp)
1112: mp = &(*mp)->m_next;
1113: }
1.85 rpaulo 1114:
1.2 itojun 1115: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1116: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1117:
1.97 christos 1118: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1119: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1120: if (*mp)
1121: mp = &(*mp)->m_next;
1122: }
1123:
1124: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1125: u_int32_t flowinfo;
1126: int tclass;
1127:
1128: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1129: flowinfo >>= 20;
1130:
1131: tclass = flowinfo & 0xff;
1.97 christos 1132: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1133: IPV6_TCLASS, IPPROTO_IPV6);
1134:
1.2 itojun 1135: if (*mp)
1136: mp = &(*mp)->m_next;
1137: }
1138:
1139: /*
1.75 itojun 1140: * IPV6_HOPOPTS socket option. Recall that we required super-user
1141: * privilege for the option (see ip6_ctloutput), but it might be too
1142: * strict, since there might be some hop-by-hop options which can be
1143: * returned to normal user.
1.85 rpaulo 1144: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1145: */
1.75 itojun 1146: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1147: /*
1148: * Check if a hop-by-hop options header is contatined in the
1149: * received packet, and if so, store the options as ancillary
1150: * data. Note that a hop-by-hop options header must be
1151: * just after the IPv6 header, which fact is assured through
1152: * the IPv6 input processing.
1153: */
1.78 christos 1154: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1155: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1156: struct ip6_hbh *hbh;
1157: int hbhlen;
1.62 itojun 1158: struct mbuf *ext;
1.9 itojun 1159:
1.62 itojun 1160: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1161: xip6->ip6_nxt);
1.62 itojun 1162: if (ext == NULL) {
1.116 thorpej 1163: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1164: return;
1165: }
1.62 itojun 1166: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1167: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1168: if (hbhlen != ext->m_len) {
1169: m_freem(ext);
1.116 thorpej 1170: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1171: return;
1172: }
1.2 itojun 1173:
1174: /*
1175: * XXX: We copy whole the header even if a jumbo
1176: * payload option is included, which option is to
1177: * be removed before returning in the RFC 2292.
1.85 rpaulo 1178: * Note: this constraint is removed in RFC3542.
1.2 itojun 1179: */
1.97 christos 1180: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1181: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1182: IPPROTO_IPV6);
1.2 itojun 1183: if (*mp)
1184: mp = &(*mp)->m_next;
1.62 itojun 1185: m_freem(ext);
1.2 itojun 1186: }
1187: }
1188:
1189: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1190: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1191: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1192: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1193:
1194: /*
1195: * Search for destination options headers or routing
1196: * header(s) through the header chain, and stores each
1197: * header as ancillary data.
1198: * Note that the order of the headers remains in
1199: * the chain of ancillary data.
1200: */
1.86 rpaulo 1201: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1202: struct ip6_ext *ip6e = NULL;
1.9 itojun 1203: int elen;
1.62 itojun 1204: struct mbuf *ext = NULL;
1.9 itojun 1205:
1.62 itojun 1206: /*
1207: * if it is not an extension header, don't try to
1208: * pull it from the chain.
1209: */
1210: switch (nxt) {
1211: case IPPROTO_DSTOPTS:
1212: case IPPROTO_ROUTING:
1213: case IPPROTO_HOPOPTS:
1214: case IPPROTO_AH: /* is it possible? */
1215: break;
1216: default:
1217: goto loopend;
1218: }
1219:
1220: ext = ip6_pullexthdr(m, off, nxt);
1221: if (ext == NULL) {
1.116 thorpej 1222: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1223: return;
1224: }
1.62 itojun 1225: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1226: if (nxt == IPPROTO_AH)
1227: elen = (ip6e->ip6e_len + 2) << 2;
1228: else
1229: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1230: if (elen != ext->m_len) {
1231: m_freem(ext);
1.116 thorpej 1232: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1233: return;
1234: }
1.57 thorpej 1235: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1236:
1.35 itojun 1237: switch (nxt) {
1.62 itojun 1238: case IPPROTO_DSTOPTS:
1.127 martin 1239: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1240: break;
1241:
1.97 christos 1242: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1243: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1244: IPPROTO_IPV6);
1.35 itojun 1245: if (*mp)
1246: mp = &(*mp)->m_next;
1247: break;
1248:
1249: case IPPROTO_ROUTING:
1.127 martin 1250: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1251: break;
1252:
1.97 christos 1253: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1254: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1255: IPPROTO_IPV6);
1.35 itojun 1256: if (*mp)
1257: mp = &(*mp)->m_next;
1258: break;
1259:
1.62 itojun 1260: case IPPROTO_HOPOPTS:
1261: case IPPROTO_AH: /* is it possible? */
1262: break;
1263:
1.35 itojun 1264: default:
1265: /*
1.62 itojun 1266: * other cases have been filtered in the above.
1267: * none will visit this case. here we supply
1268: * the code just in case (nxt overwritten or
1269: * other cases).
1.35 itojun 1270: */
1.62 itojun 1271: m_freem(ext);
1.35 itojun 1272: goto loopend;
1273:
1.2 itojun 1274: }
1275:
1276: /* proceed with the next header. */
1.9 itojun 1277: off += elen;
1.2 itojun 1278: nxt = ip6e->ip6e_nxt;
1.62 itojun 1279: ip6e = NULL;
1280: m_freem(ext);
1281: ext = NULL;
1.2 itojun 1282: }
1283: loopend:
1.62 itojun 1284: ;
1.2 itojun 1285: }
1.62 itojun 1286: }
1.85 rpaulo 1287: #undef IS2292
1288:
1289:
1290: void
1.95 dyoung 1291: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1292: uint32_t *mtu)
1.85 rpaulo 1293: {
1294: struct socket *so;
1295: struct mbuf *m_mtu;
1296: struct ip6_mtuinfo mtuctl;
1297:
1298: so = in6p->in6p_socket;
1299:
1300: if (mtu == NULL)
1301: return;
1302:
1303: #ifdef DIAGNOSTIC
1304: if (so == NULL) /* I believe this is impossible */
1305: panic("ip6_notify_pmtu: socket is NULL");
1306: #endif
1307:
1308: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1309: mtuctl.ip6m_mtu = *mtu;
1310: mtuctl.ip6m_addr = *dst;
1311: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1312: return;
1313:
1.97 christos 1314: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1315: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1316: return;
1317:
1.95 dyoung 1318: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1319: == 0) {
1320: m_freem(m_mtu);
1321: /* XXX: should count statistics */
1322: } else
1323: sorwakeup(so);
1324:
1325: return;
1326: }
1.62 itojun 1327:
1328: /*
1329: * pull single extension header from mbuf chain. returns single mbuf that
1330: * contains the result, or NULL on error.
1331: */
1332: static struct mbuf *
1.107 christos 1333: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1334: {
1335: struct ip6_ext ip6e;
1336: size_t elen;
1337: struct mbuf *n;
1338:
1339: #ifdef DIAGNOSTIC
1340: switch (nxt) {
1341: case IPPROTO_DSTOPTS:
1342: case IPPROTO_ROUTING:
1343: case IPPROTO_HOPOPTS:
1344: case IPPROTO_AH: /* is it possible? */
1345: break;
1346: default:
1347: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1348: }
1.62 itojun 1349: #endif
1.2 itojun 1350:
1.97 christos 1351: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1352: if (nxt == IPPROTO_AH)
1353: elen = (ip6e.ip6e_len + 2) << 2;
1354: else
1355: elen = (ip6e.ip6e_len + 1) << 3;
1356:
1357: MGET(n, M_DONTWAIT, MT_DATA);
1358: if (n && elen >= MLEN) {
1359: MCLGET(n, M_DONTWAIT);
1360: if ((n->m_flags & M_EXT) == 0) {
1361: m_free(n);
1362: n = NULL;
1363: }
1364: }
1365: if (!n)
1366: return NULL;
1367:
1368: n->m_len = 0;
1369: if (elen >= M_TRAILINGSPACE(n)) {
1370: m_free(n);
1371: return NULL;
1372: }
1373:
1.97 christos 1374: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1375: n->m_len = elen;
1376: return n;
1.2 itojun 1377: }
1378:
1379: /*
1380: * Get pointer to the previous header followed by the header
1381: * currently processed.
1382: * XXX: This function supposes that
1383: * M includes all headers,
1384: * the next header field and the header length field of each header
1385: * are valid, and
1386: * the sum of each header length equals to OFF.
1387: * Because of these assumptions, this function must be called very
1388: * carefully. Moreover, it will not be used in the near future when
1389: * we develop `neater' mechanism to process extension headers.
1390: */
1.58 itojun 1391: u_int8_t *
1.107 christos 1392: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1393: {
1394: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1395:
1396: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1397: return (&ip6->ip6_nxt);
1.2 itojun 1398: else {
1399: int len, nxt;
1400: struct ip6_ext *ip6e = NULL;
1401:
1402: nxt = ip6->ip6_nxt;
1403: len = sizeof(struct ip6_hdr);
1404: while (len < off) {
1.97 christos 1405: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1406:
1.35 itojun 1407: switch (nxt) {
1.2 itojun 1408: case IPPROTO_FRAGMENT:
1409: len += sizeof(struct ip6_frag);
1410: break;
1411: case IPPROTO_AH:
1412: len += (ip6e->ip6e_len + 2) << 2;
1413: break;
1414: default:
1415: len += (ip6e->ip6e_len + 1) << 3;
1416: break;
1417: }
1418: nxt = ip6e->ip6e_nxt;
1419: }
1420: if (ip6e)
1.58 itojun 1421: return (&ip6e->ip6e_nxt);
1.2 itojun 1422: else
1423: return NULL;
1.18 itojun 1424: }
1425: }
1426:
1427: /*
1428: * get next header offset. m will be retained.
1429: */
1430: int
1.107 christos 1431: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1432: {
1433: struct ip6_hdr ip6;
1434: struct ip6_ext ip6e;
1435: struct ip6_frag fh;
1436:
1437: /* just in case */
1438: if (m == NULL)
1439: panic("ip6_nexthdr: m == NULL");
1440: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1441: return -1;
1442:
1443: switch (proto) {
1444: case IPPROTO_IPV6:
1.83 rpaulo 1445: /* do not chase beyond intermediate IPv6 headers */
1446: if (off != 0)
1447: return -1;
1.18 itojun 1448: if (m->m_pkthdr.len < off + sizeof(ip6))
1449: return -1;
1.97 christos 1450: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1451: if (nxtp)
1452: *nxtp = ip6.ip6_nxt;
1453: off += sizeof(ip6);
1454: return off;
1455:
1456: case IPPROTO_FRAGMENT:
1457: /*
1458: * terminate parsing if it is not the first fragment,
1459: * it does not make sense to parse through it.
1460: */
1461: if (m->m_pkthdr.len < off + sizeof(fh))
1462: return -1;
1.97 christos 1463: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1464: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1465: return -1;
1466: if (nxtp)
1467: *nxtp = fh.ip6f_nxt;
1468: off += sizeof(struct ip6_frag);
1469: return off;
1470:
1471: case IPPROTO_AH:
1472: if (m->m_pkthdr.len < off + sizeof(ip6e))
1473: return -1;
1.97 christos 1474: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1475: if (nxtp)
1476: *nxtp = ip6e.ip6e_nxt;
1477: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1478: if (m->m_pkthdr.len < off)
1479: return -1;
1.18 itojun 1480: return off;
1481:
1482: case IPPROTO_HOPOPTS:
1483: case IPPROTO_ROUTING:
1484: case IPPROTO_DSTOPTS:
1485: if (m->m_pkthdr.len < off + sizeof(ip6e))
1486: return -1;
1.97 christos 1487: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1488: if (nxtp)
1489: *nxtp = ip6e.ip6e_nxt;
1490: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1491: if (m->m_pkthdr.len < off)
1492: return -1;
1.18 itojun 1493: return off;
1494:
1495: case IPPROTO_NONE:
1496: case IPPROTO_ESP:
1497: case IPPROTO_IPCOMP:
1498: /* give up */
1499: return -1;
1500:
1501: default:
1502: return -1;
1503: }
1504: }
1505:
1506: /*
1507: * get offset for the last header in the chain. m will be kept untainted.
1508: */
1509: int
1.107 christos 1510: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1511: {
1512: int newoff;
1513: int nxt;
1514:
1515: if (!nxtp) {
1516: nxt = -1;
1517: nxtp = &nxt;
1518: }
1.86 rpaulo 1519: for (;;) {
1.18 itojun 1520: newoff = ip6_nexthdr(m, off, proto, nxtp);
1521: if (newoff < 0)
1522: return off;
1523: else if (newoff < off)
1524: return -1; /* invalid */
1525: else if (newoff == off)
1526: return newoff;
1527:
1528: off = newoff;
1529: proto = *nxtp;
1.2 itojun 1530: }
1531: }
1532:
1.81 rpaulo 1533: struct m_tag *
1.107 christos 1534: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1535: {
1536: struct m_tag *mtag;
1537:
1538: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1539: if (!mtag) {
1540: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1541: M_NOWAIT);
1542: if (mtag) {
1543: m_tag_prepend(m, mtag);
1.124 cegger 1544: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1545: }
1546: }
1547: return mtag;
1548: }
1549:
1550: struct m_tag *
1.107 christos 1551: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1552: {
1553: struct m_tag *mtag;
1554:
1555: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1556: return mtag;
1557: }
1558:
1559: void
1.107 christos 1560: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1561: {
1562: struct m_tag *mtag;
1563:
1564: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1565: if (mtag)
1566: m_tag_delete(m, mtag);
1567: }
1568:
1.98 liamjfoy 1569: #ifdef GATEWAY
1570: /*
1571: * sysctl helper routine for net.inet.ip6.maxflows. Since
1572: * we could reduce this value, call ip6flow_reap();
1573: */
1574: static int
1.101 liamjfoy 1575: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1576: {
1.121 simonb 1577: int error;
1.98 liamjfoy 1578:
1.121 simonb 1579: error = sysctl_lookup(SYSCTLFN_CALL(rnode));
1580: if (error || newp == NULL)
1581: return (error);
1.98 liamjfoy 1582:
1.121 simonb 1583: mutex_enter(softnet_lock);
1.122 matt 1584: KERNEL_LOCK(1, NULL);
1.120 matt 1585:
1.121 simonb 1586: ip6flow_reap(0);
1.120 matt 1587:
1588: KERNEL_UNLOCK_ONE(NULL);
1.121 simonb 1589: mutex_exit(softnet_lock);
1.98 liamjfoy 1590:
1.121 simonb 1591: return (0);
1.98 liamjfoy 1592: }
1.99 liamjfoy 1593:
1594: static int
1595: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1596: {
1597: int error, tmp;
1598: struct sysctlnode node;
1599:
1600: node = *rnode;
1601: tmp = ip6_hashsize;
1602: node.sysctl_data = &tmp;
1603: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1604: if (error || newp == NULL)
1605: return (error);
1606:
1607: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1608: /*
1609: * Can only fail due to malloc()
1610: */
1.120 matt 1611: mutex_enter(softnet_lock);
1.122 matt 1612: KERNEL_LOCK(1, NULL);
1.120 matt 1613:
1614: error = ip6flow_invalidate_all(tmp);
1615:
1616: KERNEL_UNLOCK_ONE(NULL);
1617: mutex_exit(softnet_lock);
1.99 liamjfoy 1618: } else {
1619: /*
1620: * EINVAL if not a power of 2
1.121 simonb 1621: */
1.120 matt 1622: error = EINVAL;
1.99 liamjfoy 1623: }
1624:
1.120 matt 1625: return error;
1.99 liamjfoy 1626: }
1.98 liamjfoy 1627: #endif /* GATEWAY */
1628:
1.2 itojun 1629: /*
1630: * System control for IP6
1631: */
1632:
1.120 matt 1633: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1634: 0, 0, 0, 0,
1635: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1636: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1637: EMSGSIZE, EHOSTUNREACH, 0, 0,
1638: 0, 0, 0, 0,
1639: ENOPROTOOPT
1640: };
1641:
1.116 thorpej 1642: static int
1643: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1644: {
1645:
1.119 thorpej 1646: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1647: }
1648:
1.128 pooka 1649: static void
1650: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1651: {
1.85 rpaulo 1652: #ifdef RFC2292
1653: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1654: #else
1655: #define IS2292(x, y) (y)
1656: #endif
1.26 itojun 1657:
1.73 atatat 1658: sysctl_createv(clog, 0, NULL, NULL,
1659: CTLFLAG_PERMANENT,
1.74 atatat 1660: CTLTYPE_NODE, "inet6",
1661: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1662: NULL, 0, NULL, 0,
1663: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1664: sysctl_createv(clog, 0, NULL, NULL,
1665: CTLFLAG_PERMANENT,
1.74 atatat 1666: CTLTYPE_NODE, "ip6",
1667: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1668: NULL, 0, NULL, 0,
1669: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1670:
1.73 atatat 1671: sysctl_createv(clog, 0, NULL, NULL,
1672: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1673: CTLTYPE_INT, "forwarding",
1674: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1675: NULL, 0, &ip6_forwarding, 0,
1676: CTL_NET, PF_INET6, IPPROTO_IPV6,
1677: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1678: sysctl_createv(clog, 0, NULL, NULL,
1679: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1680: CTLTYPE_INT, "redirect",
1681: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1682: NULL, 0, &ip6_sendredirects, 0,
1683: CTL_NET, PF_INET6, IPPROTO_IPV6,
1684: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1685: sysctl_createv(clog, 0, NULL, NULL,
1686: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1687: CTLTYPE_INT, "hlim",
1688: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1689: NULL, 0, &ip6_defhlim, 0,
1690: CTL_NET, PF_INET6, IPPROTO_IPV6,
1691: IPV6CTL_DEFHLIM, CTL_EOL);
1692: #ifdef notyet
1.73 atatat 1693: sysctl_createv(clog, 0, NULL, NULL,
1694: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1695: CTLTYPE_INT, "mtu", NULL,
1696: NULL, 0, &, 0,
1697: CTL_NET, PF_INET6, IPPROTO_IPV6,
1698: IPV6CTL_DEFMTU, CTL_EOL);
1699: #endif
1700: #ifdef __no_idea__
1.73 atatat 1701: sysctl_createv(clog, 0, NULL, NULL,
1702: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1703: CTLTYPE_INT, "forwsrcrt", NULL,
1704: NULL, 0, &?, 0,
1705: CTL_NET, PF_INET6, IPPROTO_IPV6,
1706: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1707: sysctl_createv(clog, 0, NULL, NULL,
1708: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1709: CTLTYPE_STRUCT, "mrtstats", NULL,
1710: NULL, 0, &?, sizeof(?),
1711: CTL_NET, PF_INET6, IPPROTO_IPV6,
1712: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1713: sysctl_createv(clog, 0, NULL, NULL,
1714: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1715: CTLTYPE_?, "mrtproto", NULL,
1716: NULL, 0, &?, sizeof(?),
1717: CTL_NET, PF_INET6, IPPROTO_IPV6,
1718: IPV6CTL_MRTPROTO, CTL_EOL);
1719: #endif
1.73 atatat 1720: sysctl_createv(clog, 0, NULL, NULL,
1721: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1722: CTLTYPE_INT, "maxfragpackets",
1723: SYSCTL_DESCR("Maximum number of fragments to buffer "
1724: "for reassembly"),
1.70 atatat 1725: NULL, 0, &ip6_maxfragpackets, 0,
1726: CTL_NET, PF_INET6, IPPROTO_IPV6,
1727: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1728: #ifdef __no_idea__
1.73 atatat 1729: sysctl_createv(clog, 0, NULL, NULL,
1730: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1731: CTLTYPE_INT, "sourcecheck", NULL,
1732: NULL, 0, &?, 0,
1733: CTL_NET, PF_INET6, IPPROTO_IPV6,
1734: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1735: sysctl_createv(clog, 0, NULL, NULL,
1736: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1737: CTLTYPE_INT, "sourcecheck_logint", NULL,
1738: NULL, 0, &?, 0,
1739: CTL_NET, PF_INET6, IPPROTO_IPV6,
1740: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1741: #endif
1.73 atatat 1742: sysctl_createv(clog, 0, NULL, NULL,
1743: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1744: CTLTYPE_INT, "accept_rtadv",
1745: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1746: NULL, 0, &ip6_accept_rtadv, 0,
1747: CTL_NET, PF_INET6, IPPROTO_IPV6,
1748: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1749: sysctl_createv(clog, 0, NULL, NULL,
1750: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1751: CTLTYPE_INT, "rtadv_maxroutes",
1752: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1753: NULL, 0, &ip6_rtadv_maxroutes, 0,
1754: CTL_NET, PF_INET6, IPPROTO_IPV6,
1755: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1756: sysctl_createv(clog, 0, NULL, NULL,
1757: CTLFLAG_PERMANENT,
1758: CTLTYPE_INT, "rtadv_numroutes",
1759: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1760: NULL, 0, &nd6_numroutes, 0,
1761: CTL_NET, PF_INET6, IPPROTO_IPV6,
1762: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1763: sysctl_createv(clog, 0, NULL, NULL,
1764: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1765: CTLTYPE_INT, "keepfaith",
1766: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1767: NULL, 0, &ip6_keepfaith, 0,
1768: CTL_NET, PF_INET6, IPPROTO_IPV6,
1769: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1770: sysctl_createv(clog, 0, NULL, NULL,
1771: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1772: CTLTYPE_INT, "log_interval",
1773: SYSCTL_DESCR("Minumum interval between logging "
1774: "unroutable packets"),
1.70 atatat 1775: NULL, 0, &ip6_log_interval, 0,
1776: CTL_NET, PF_INET6, IPPROTO_IPV6,
1777: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1778: sysctl_createv(clog, 0, NULL, NULL,
1779: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1780: CTLTYPE_INT, "hdrnestlimit",
1781: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1782: NULL, 0, &ip6_hdrnestlimit, 0,
1783: CTL_NET, PF_INET6, IPPROTO_IPV6,
1784: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1785: sysctl_createv(clog, 0, NULL, NULL,
1786: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1787: CTLTYPE_INT, "dad_count",
1788: SYSCTL_DESCR("Number of Duplicate Address Detection "
1789: "probes to send"),
1.70 atatat 1790: NULL, 0, &ip6_dad_count, 0,
1791: CTL_NET, PF_INET6, IPPROTO_IPV6,
1792: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1793: sysctl_createv(clog, 0, NULL, NULL,
1794: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1795: CTLTYPE_INT, "auto_flowlabel",
1796: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1797: NULL, 0, &ip6_auto_flowlabel, 0,
1798: CTL_NET, PF_INET6, IPPROTO_IPV6,
1799: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1800: sysctl_createv(clog, 0, NULL, NULL,
1801: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1802: CTLTYPE_INT, "defmcasthlim",
1803: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1804: NULL, 0, &ip6_defmcasthlim, 0,
1805: CTL_NET, PF_INET6, IPPROTO_IPV6,
1806: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1807: #if NGIF > 0
1.73 atatat 1808: sysctl_createv(clog, 0, NULL, NULL,
1809: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1810: CTLTYPE_INT, "gifhlim",
1811: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1812: NULL, 0, &ip6_gif_hlim, 0,
1813: CTL_NET, PF_INET6, IPPROTO_IPV6,
1814: IPV6CTL_GIF_HLIM, CTL_EOL);
1815: #endif /* NGIF */
1.73 atatat 1816: sysctl_createv(clog, 0, NULL, NULL,
1817: CTLFLAG_PERMANENT,
1.74 atatat 1818: CTLTYPE_STRING, "kame_version",
1819: SYSCTL_DESCR("KAME Version"),
1.78 christos 1820: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1821: CTL_NET, PF_INET6, IPPROTO_IPV6,
1822: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1823: sysctl_createv(clog, 0, NULL, NULL,
1824: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1825: CTLTYPE_INT, "use_deprecated",
1826: SYSCTL_DESCR("Allow use of deprecated addresses as "
1827: "source addresses"),
1.70 atatat 1828: NULL, 0, &ip6_use_deprecated, 0,
1829: CTL_NET, PF_INET6, IPPROTO_IPV6,
1830: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1831: sysctl_createv(clog, 0, NULL, NULL,
1832: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1833: CTLTYPE_INT, "rr_prune", NULL,
1834: NULL, 0, &ip6_rr_prune, 0,
1835: CTL_NET, PF_INET6, IPPROTO_IPV6,
1836: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1837: sysctl_createv(clog, 0, NULL, NULL,
1838: CTLFLAG_PERMANENT
1.70 atatat 1839: #ifndef INET6_BINDV6ONLY
1.73 atatat 1840: |CTLFLAG_READWRITE,
1.70 atatat 1841: #endif
1.74 atatat 1842: CTLTYPE_INT, "v6only",
1843: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1844: "to PF_INET sockets"),
1.70 atatat 1845: NULL, 0, &ip6_v6only, 0,
1846: CTL_NET, PF_INET6, IPPROTO_IPV6,
1847: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1848: sysctl_createv(clog, 0, NULL, NULL,
1849: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1850: CTLTYPE_INT, "anonportmin",
1851: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1852: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1853: CTL_NET, PF_INET6, IPPROTO_IPV6,
1854: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1855: sysctl_createv(clog, 0, NULL, NULL,
1856: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1857: CTLTYPE_INT, "anonportmax",
1858: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1859: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1860: CTL_NET, PF_INET6, IPPROTO_IPV6,
1861: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1862: #ifndef IPNOPRIVPORTS
1.73 atatat 1863: sysctl_createv(clog, 0, NULL, NULL,
1864: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1865: CTLTYPE_INT, "lowportmin",
1866: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1867: "to assign"),
1.70 atatat 1868: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1869: CTL_NET, PF_INET6, IPPROTO_IPV6,
1870: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1871: sysctl_createv(clog, 0, NULL, NULL,
1872: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1873: CTLTYPE_INT, "lowportmax",
1874: SYSCTL_DESCR("Highest privileged ephemeral port number "
1875: "to assign"),
1.70 atatat 1876: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1877: CTL_NET, PF_INET6, IPPROTO_IPV6,
1878: IPV6CTL_LOWPORTMAX, CTL_EOL);
1879: #endif /* IPNOPRIVPORTS */
1.73 atatat 1880: sysctl_createv(clog, 0, NULL, NULL,
1881: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1882: CTLTYPE_INT, "use_tempaddr",
1883: SYSCTL_DESCR("Use temporary address"),
1884: NULL, 0, &ip6_use_tempaddr, 0,
1885: CTL_NET, PF_INET6, IPPROTO_IPV6,
1886: CTL_CREATE, CTL_EOL);
1887: sysctl_createv(clog, 0, NULL, NULL,
1888: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1889: CTLTYPE_INT, "temppltime",
1890: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1891: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1892: CTL_NET, PF_INET6, IPPROTO_IPV6,
1893: CTL_CREATE, CTL_EOL);
1894: sysctl_createv(clog, 0, NULL, NULL,
1895: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1896: CTLTYPE_INT, "tempvltime",
1897: SYSCTL_DESCR("valid lifetime of a temporary address"),
1898: NULL, 0, &ip6_temp_valid_lifetime, 0,
1899: CTL_NET, PF_INET6, IPPROTO_IPV6,
1900: CTL_CREATE, CTL_EOL);
1901: sysctl_createv(clog, 0, NULL, NULL,
1902: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1903: CTLTYPE_INT, "maxfrags",
1904: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1905: NULL, 0, &ip6_maxfrags, 0,
1906: CTL_NET, PF_INET6, IPPROTO_IPV6,
1907: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1908: sysctl_createv(clog, 0, NULL, NULL,
1909: CTLFLAG_PERMANENT,
1910: CTLTYPE_STRUCT, "stats",
1911: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1912: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1913: CTL_NET, PF_INET6, IPPROTO_IPV6,
1914: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1915: sysctl_createv(clog, 0, NULL, NULL,
1916: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1917: CTLTYPE_INT, "use_defaultzone",
1918: SYSCTL_DESCR("Whether to use the default scope zones"),
1919: NULL, 0, &ip6_use_defzone, 0,
1920: CTL_NET, PF_INET6, IPPROTO_IPV6,
1921: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1922: sysctl_createv(clog, 0, NULL, NULL,
1923: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1924: CTLTYPE_INT, "mcast_pmtu",
1925: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1926: NULL, 0, &ip6_mcast_pmtu, 0,
1927: CTL_NET, PF_INET6, IPPROTO_IPV6,
1928: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1929: #ifdef GATEWAY
1930: sysctl_createv(clog, 0, NULL, NULL,
1931: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1932: CTLTYPE_INT, "maxflows",
1933: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.101 liamjfoy 1934: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1935: CTL_NET, PF_INET6, IPPROTO_IPV6,
1936: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1937: sysctl_createv(clog, 0, NULL, NULL,
1938: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1939: CTLTYPE_INT, "hashsize",
1940: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1941: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1942: CTL_NET, PF_INET6, IPPROTO_IPV6,
1943: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1944: #endif
1.138 christos 1945: /* anonportalgo RFC6056 subtree */
1.140 christos 1946: const struct sysctlnode *portalgo_node;
1947: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1948: CTLFLAG_PERMANENT,
1949: CTLTYPE_NODE, "anonportalgo",
1950: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1951: NULL, 0, NULL, 0,
1952: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1953: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1954: CTLFLAG_PERMANENT,
1955: CTLTYPE_STRING, "available",
1956: SYSCTL_DESCR("available algorithms"),
1.140 christos 1957: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1958: CTL_CREATE, CTL_EOL);
1.140 christos 1959: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1960: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1961: CTLTYPE_STRING, "selected",
1962: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1963: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1964: CTL_CREATE, CTL_EOL);
1.141 christos 1965: sysctl_createv(clog, 0, &portalgo_node, NULL,
1966: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1967: CTLTYPE_STRUCT, "reserve",
1968: SYSCTL_DESCR("bitmap of reserved ports"),
1969: sysctl_portalgo_reserve6, 0, NULL, 0,
1970: CTL_CREATE, CTL_EOL);
1.139 christos 1971: sysctl_createv(clog, 0, NULL, NULL,
1972: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1973: CTLTYPE_INT, "neighborgcthresh",
1974: SYSCTL_DESCR("Maximum number of entries in neighbor"
1975: " cache"),
1976: NULL, 1, &ip6_neighborgcthresh, 0,
1977: CTL_NET, PF_INET6, IPPROTO_IPV6,
1978: CTL_CREATE, CTL_EOL);
1979: sysctl_createv(clog, 0, NULL, NULL,
1980: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1981: CTLTYPE_INT, "maxifprefixes",
1982: SYSCTL_DESCR("Maximum number of prefixes created by"
1983: " route advertisement per interface"),
1984: NULL, 1, &ip6_maxifprefixes, 0,
1985: CTL_NET, PF_INET6, IPPROTO_IPV6,
1986: CTL_CREATE, CTL_EOL);
1987: sysctl_createv(clog, 0, NULL, NULL,
1988: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1989: CTLTYPE_INT, "maxifdefrouters",
1990: SYSCTL_DESCR("Maximum number of default routers created"
1991: " by route advertisement per interface"),
1992: NULL, 1, &ip6_maxifdefrouters, 0,
1993: CTL_NET, PF_INET6, IPPROTO_IPV6,
1994: CTL_CREATE, CTL_EOL);
1995: sysctl_createv(clog, 0, NULL, NULL,
1996: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1997: CTLTYPE_INT, "maxdynroutes",
1998: SYSCTL_DESCR("Maximum number of routes created via"
1999: " redirect"),
2000: NULL, 1, &ip6_maxdynroutes, 0,
2001: CTL_NET, PF_INET6, IPPROTO_IPV6,
2002: CTL_CREATE, CTL_EOL);
1.2 itojun 2003: }
1.116 thorpej 2004:
2005: void
2006: ip6_statinc(u_int stat)
2007: {
2008:
2009: KASSERT(stat < IP6_NSTATS);
2010: IP6_STATINC(stat);
2011: }
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