Annotation of src/sys/netinet6/ip6_input.c, Revision 1.142.2.1
1.142.2.1! rmind 1: /* $NetBSD$ */
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>
1.142.2.1! rmind 65: __KERNEL_RCSID(0, "$NetBSD$");
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;
809:
810: mtag = ip6_addaux(m);
1.112 dyoung 811: if (mtag != NULL) {
812: struct ip6aux *ip6a;
813:
814: ip6a = (struct ip6aux *)(mtag + 1);
815: in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id);
816: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
817: ip6a->ip6a_flags = ia->ia6_flags;
818: }
1.81 rpaulo 819: return mtag; /* NULL if failed to set */
820: }
821:
1.112 dyoung 822: const struct ip6aux *
1.107 christos 823: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 824: {
825: struct m_tag *mtag;
826:
827: mtag = ip6_findaux(m);
1.112 dyoung 828: if (mtag != NULL)
829: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 830: else
831: return NULL;
832: }
833:
834: /*
1.2 itojun 835: * Hop-by-Hop options header processing. If a valid jumbo payload option is
836: * included, the real payload length will be stored in plenp.
1.107 christos 837: *
838: * rtalertp - XXX: should be stored more smart way
1.2 itojun 839: */
1.136 drochner 840: int
1.107 christos 841: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
842: struct mbuf **mp, int *offp)
1.2 itojun 843: {
1.35 itojun 844: struct mbuf *m = *mp;
1.2 itojun 845: int off = *offp, hbhlen;
846: struct ip6_hbh *hbh;
847:
848: /* validation of the length of the header */
1.9 itojun 849: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
850: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
851: if (hbh == NULL) {
1.116 thorpej 852: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 853: return -1;
854: }
855: hbhlen = (hbh->ip6h_len + 1) << 3;
856: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
857: hbhlen);
858: if (hbh == NULL) {
1.116 thorpej 859: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 860: return -1;
861: }
1.57 thorpej 862: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 863: off += hbhlen;
864: hbhlen -= sizeof(struct ip6_hbh);
865:
866: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
867: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 868: return (-1);
1.2 itojun 869:
870: *offp = off;
871: *mp = m;
1.58 itojun 872: return (0);
1.2 itojun 873: }
874:
875: /*
876: * Search header for all Hop-by-hop options and process each option.
877: * This function is separate from ip6_hopopts_input() in order to
878: * handle a case where the sending node itself process its hop-by-hop
879: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 880: *
881: * The function assumes that hbh header is located right after the IPv6 header
882: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
883: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 884: */
1.136 drochner 885: static int
1.107 christos 886: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
887: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 888: {
889: struct ip6_hdr *ip6;
890: int optlen = 0;
891: u_int8_t *opt = opthead;
892: u_int16_t rtalert_val;
1.22 itojun 893: u_int32_t jumboplen;
1.55 itojun 894: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 895:
896: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 897: switch (*opt) {
898: case IP6OPT_PAD1:
899: optlen = 1;
900: break;
901: case IP6OPT_PADN:
902: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 903: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 904: goto bad;
905: }
906: optlen = *(opt + 1) + 2;
907: break;
908: case IP6OPT_RTALERT:
909: /* XXX may need check for alignment */
910: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 911: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 912: goto bad;
913: }
914: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 915: /* XXX stat */
916: icmp6_error(m, ICMP6_PARAM_PROB,
917: ICMP6_PARAMPROB_HEADER,
918: erroff + opt + 1 - opthead);
919: return (-1);
1.35 itojun 920: }
921: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 922: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 923: *rtalertp = ntohs(rtalert_val);
924: break;
925: case IP6OPT_JUMBO:
1.22 itojun 926: /* XXX may need check for alignment */
927: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 928: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 929: goto bad;
930: }
1.35 itojun 931: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 932: /* XXX stat */
933: icmp6_error(m, ICMP6_PARAM_PROB,
934: ICMP6_PARAMPROB_HEADER,
935: erroff + opt + 1 - opthead);
936: return (-1);
1.35 itojun 937: }
1.22 itojun 938: optlen = IP6OPT_JUMBO_LEN;
939:
940: /*
941: * IPv6 packets that have non 0 payload length
1.35 itojun 942: * must not contain a jumbo payload option.
1.22 itojun 943: */
944: ip6 = mtod(m, struct ip6_hdr *);
945: if (ip6->ip6_plen) {
1.116 thorpej 946: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 947: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 948: ICMP6_PARAMPROB_HEADER,
949: erroff + opt - opthead);
950: return (-1);
1.22 itojun 951: }
1.2 itojun 952:
1.22 itojun 953: /*
954: * We may see jumbolen in unaligned location, so
955: * we'd need to perform bcopy().
956: */
1.126 tsutsui 957: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 958: jumboplen = (u_int32_t)htonl(jumboplen);
959:
960: #if 1
961: /*
962: * if there are multiple jumbo payload options,
963: * *plenp will be non-zero and the packet will be
964: * rejected.
965: * the behavior may need some debate in ipngwg -
966: * multiple options does not make sense, however,
967: * there's no explicit mention in specification.
968: */
969: if (*plenp != 0) {
1.116 thorpej 970: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 971: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 972: ICMP6_PARAMPROB_HEADER,
973: erroff + opt + 2 - opthead);
974: return (-1);
1.22 itojun 975: }
1.8 itojun 976: #endif
1.2 itojun 977:
1.22 itojun 978: /*
979: * jumbo payload length must be larger than 65535.
980: */
981: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 982: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 983: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 984: ICMP6_PARAMPROB_HEADER,
985: erroff + opt + 2 - opthead);
986: return (-1);
1.22 itojun 987: }
988: *plenp = jumboplen;
989:
990: break;
1.35 itojun 991: default: /* unknown option */
992: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 993: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 994: goto bad;
995: }
1.55 itojun 996: optlen = ip6_unknown_opt(opt, m,
997: erroff + opt - opthead);
998: if (optlen == -1)
999: return (-1);
1.35 itojun 1000: optlen += 2;
1001: break;
1.2 itojun 1002: }
1003: }
1004:
1.55 itojun 1005: return (0);
1.2 itojun 1006:
1007: bad:
1008: m_freem(m);
1.55 itojun 1009: return (-1);
1.2 itojun 1010: }
1011:
1012: /*
1013: * Unknown option processing.
1014: * The third argument `off' is the offset from the IPv6 header to the option,
1015: * which is necessary if the IPv6 header the and option header and IPv6 header
1016: * is not continuous in order to return an ICMPv6 error.
1017: */
1018: int
1.107 christos 1019: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 1020: {
1021: struct ip6_hdr *ip6;
1022:
1.35 itojun 1023: switch (IP6OPT_TYPE(*optp)) {
1024: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1025: return ((int)*(optp + 1));
1.35 itojun 1026: case IP6OPT_TYPE_DISCARD: /* silently discard */
1027: m_freem(m);
1.58 itojun 1028: return (-1);
1.35 itojun 1029: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 1030: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1031: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1032: return (-1);
1.35 itojun 1033: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 1034: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1035: ip6 = mtod(m, struct ip6_hdr *);
1036: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1037: (m->m_flags & (M_BCAST|M_MCAST)))
1038: m_freem(m);
1039: else
1040: icmp6_error(m, ICMP6_PARAM_PROB,
1041: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1042: return (-1);
1.2 itojun 1043: }
1044:
1045: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1046: return (-1);
1.2 itojun 1047: }
1048:
1049: /*
1.9 itojun 1050: * Create the "control" list for this pcb.
1051: *
1052: * The routine will be called from upper layer handlers like tcp6_input().
1053: * Thus the routine assumes that the caller (tcp6_input) have already
1054: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1055: * very first mbuf on the mbuf chain.
1056: * We may want to add some infinite loop prevention or sanity checks for safety.
1057: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1058: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1059: */
1060: void
1.107 christos 1061: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1062: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1063: {
1.85 rpaulo 1064: #ifdef RFC2292
1065: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1066: #else
1067: #define IS2292(x, y) (y)
1068: #endif
1069:
1.123 christos 1070: if (in6p->in6p_socket->so_options & SO_TIMESTAMP
1071: #ifdef SO_OTIMESTAMP
1072: || in6p->in6p_socket->so_options & SO_OTIMESTAMP
1073: #endif
1074: ) {
1.2 itojun 1075: struct timeval tv;
1076:
1077: microtime(&tv);
1.123 christos 1078: #ifdef SO_OTIMESTAMP
1079: if (in6p->in6p_socket->so_options & SO_OTIMESTAMP) {
1080: struct timeval50 tv50;
1081: timeval_to_timeval50(&tv, &tv50);
1082: *mp = sbcreatecontrol((void *) &tv50, sizeof(tv50),
1083: SCM_OTIMESTAMP, SOL_SOCKET);
1084: } else
1085: #endif
1.97 christos 1086: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1087: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1088: if (*mp)
1089: mp = &(*mp)->m_next;
1090: }
1.87 rpaulo 1091:
1092: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1093: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1094: return;
1095:
1.2 itojun 1096: /* RFC 2292 sec. 5 */
1.35 itojun 1097: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1098: struct in6_pktinfo pi6;
1.85 rpaulo 1099:
1.126 tsutsui 1100: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1101: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1102: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1103: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1104: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1105: sizeof(struct in6_pktinfo),
1106: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1107: if (*mp)
1108: mp = &(*mp)->m_next;
1109: }
1.85 rpaulo 1110:
1.2 itojun 1111: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1112: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1113:
1.97 christos 1114: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1115: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1116: if (*mp)
1117: mp = &(*mp)->m_next;
1118: }
1119:
1120: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1121: u_int32_t flowinfo;
1122: int tclass;
1123:
1124: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1125: flowinfo >>= 20;
1126:
1127: tclass = flowinfo & 0xff;
1.97 christos 1128: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1129: IPV6_TCLASS, IPPROTO_IPV6);
1130:
1.2 itojun 1131: if (*mp)
1132: mp = &(*mp)->m_next;
1133: }
1134:
1135: /*
1.75 itojun 1136: * IPV6_HOPOPTS socket option. Recall that we required super-user
1137: * privilege for the option (see ip6_ctloutput), but it might be too
1138: * strict, since there might be some hop-by-hop options which can be
1139: * returned to normal user.
1.85 rpaulo 1140: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1141: */
1.75 itojun 1142: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1143: /*
1144: * Check if a hop-by-hop options header is contatined in the
1145: * received packet, and if so, store the options as ancillary
1146: * data. Note that a hop-by-hop options header must be
1147: * just after the IPv6 header, which fact is assured through
1148: * the IPv6 input processing.
1149: */
1.78 christos 1150: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1151: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1152: struct ip6_hbh *hbh;
1153: int hbhlen;
1.62 itojun 1154: struct mbuf *ext;
1.9 itojun 1155:
1.62 itojun 1156: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1157: xip6->ip6_nxt);
1.62 itojun 1158: if (ext == NULL) {
1.116 thorpej 1159: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1160: return;
1161: }
1.62 itojun 1162: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1163: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1164: if (hbhlen != ext->m_len) {
1165: m_freem(ext);
1.116 thorpej 1166: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1167: return;
1168: }
1.2 itojun 1169:
1170: /*
1171: * XXX: We copy whole the header even if a jumbo
1172: * payload option is included, which option is to
1173: * be removed before returning in the RFC 2292.
1.85 rpaulo 1174: * Note: this constraint is removed in RFC3542.
1.2 itojun 1175: */
1.97 christos 1176: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1177: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1178: IPPROTO_IPV6);
1.2 itojun 1179: if (*mp)
1180: mp = &(*mp)->m_next;
1.62 itojun 1181: m_freem(ext);
1.2 itojun 1182: }
1183: }
1184:
1185: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1186: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1187: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1188: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1189:
1190: /*
1191: * Search for destination options headers or routing
1192: * header(s) through the header chain, and stores each
1193: * header as ancillary data.
1194: * Note that the order of the headers remains in
1195: * the chain of ancillary data.
1196: */
1.86 rpaulo 1197: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1198: struct ip6_ext *ip6e = NULL;
1.9 itojun 1199: int elen;
1.62 itojun 1200: struct mbuf *ext = NULL;
1.9 itojun 1201:
1.62 itojun 1202: /*
1203: * if it is not an extension header, don't try to
1204: * pull it from the chain.
1205: */
1206: switch (nxt) {
1207: case IPPROTO_DSTOPTS:
1208: case IPPROTO_ROUTING:
1209: case IPPROTO_HOPOPTS:
1210: case IPPROTO_AH: /* is it possible? */
1211: break;
1212: default:
1213: goto loopend;
1214: }
1215:
1216: ext = ip6_pullexthdr(m, off, nxt);
1217: if (ext == NULL) {
1.116 thorpej 1218: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1219: return;
1220: }
1.62 itojun 1221: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1222: if (nxt == IPPROTO_AH)
1223: elen = (ip6e->ip6e_len + 2) << 2;
1224: else
1225: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1226: if (elen != ext->m_len) {
1227: m_freem(ext);
1.116 thorpej 1228: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1229: return;
1230: }
1.57 thorpej 1231: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1232:
1.35 itojun 1233: switch (nxt) {
1.62 itojun 1234: case IPPROTO_DSTOPTS:
1.127 martin 1235: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1236: break;
1237:
1.97 christos 1238: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1239: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1240: IPPROTO_IPV6);
1.35 itojun 1241: if (*mp)
1242: mp = &(*mp)->m_next;
1243: break;
1244:
1245: case IPPROTO_ROUTING:
1.127 martin 1246: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1247: break;
1248:
1.97 christos 1249: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1250: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1251: IPPROTO_IPV6);
1.35 itojun 1252: if (*mp)
1253: mp = &(*mp)->m_next;
1254: break;
1255:
1.62 itojun 1256: case IPPROTO_HOPOPTS:
1257: case IPPROTO_AH: /* is it possible? */
1258: break;
1259:
1.35 itojun 1260: default:
1261: /*
1.62 itojun 1262: * other cases have been filtered in the above.
1263: * none will visit this case. here we supply
1264: * the code just in case (nxt overwritten or
1265: * other cases).
1.35 itojun 1266: */
1.62 itojun 1267: m_freem(ext);
1.35 itojun 1268: goto loopend;
1269:
1.2 itojun 1270: }
1271:
1272: /* proceed with the next header. */
1.9 itojun 1273: off += elen;
1.2 itojun 1274: nxt = ip6e->ip6e_nxt;
1.62 itojun 1275: ip6e = NULL;
1276: m_freem(ext);
1277: ext = NULL;
1.2 itojun 1278: }
1279: loopend:
1.62 itojun 1280: ;
1.2 itojun 1281: }
1.62 itojun 1282: }
1.85 rpaulo 1283: #undef IS2292
1284:
1285:
1286: void
1.95 dyoung 1287: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1288: uint32_t *mtu)
1.85 rpaulo 1289: {
1290: struct socket *so;
1291: struct mbuf *m_mtu;
1292: struct ip6_mtuinfo mtuctl;
1293:
1294: so = in6p->in6p_socket;
1295:
1296: if (mtu == NULL)
1297: return;
1298:
1299: #ifdef DIAGNOSTIC
1300: if (so == NULL) /* I believe this is impossible */
1301: panic("ip6_notify_pmtu: socket is NULL");
1302: #endif
1303:
1304: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1305: mtuctl.ip6m_mtu = *mtu;
1306: mtuctl.ip6m_addr = *dst;
1307: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1308: return;
1309:
1.97 christos 1310: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1311: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1312: return;
1313:
1.95 dyoung 1314: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1315: == 0) {
1316: m_freem(m_mtu);
1317: /* XXX: should count statistics */
1318: } else
1319: sorwakeup(so);
1320:
1321: return;
1322: }
1.62 itojun 1323:
1324: /*
1325: * pull single extension header from mbuf chain. returns single mbuf that
1326: * contains the result, or NULL on error.
1327: */
1328: static struct mbuf *
1.107 christos 1329: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1330: {
1331: struct ip6_ext ip6e;
1332: size_t elen;
1333: struct mbuf *n;
1334:
1335: #ifdef DIAGNOSTIC
1336: switch (nxt) {
1337: case IPPROTO_DSTOPTS:
1338: case IPPROTO_ROUTING:
1339: case IPPROTO_HOPOPTS:
1340: case IPPROTO_AH: /* is it possible? */
1341: break;
1342: default:
1343: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1344: }
1.62 itojun 1345: #endif
1.2 itojun 1346:
1.97 christos 1347: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1348: if (nxt == IPPROTO_AH)
1349: elen = (ip6e.ip6e_len + 2) << 2;
1350: else
1351: elen = (ip6e.ip6e_len + 1) << 3;
1352:
1353: MGET(n, M_DONTWAIT, MT_DATA);
1354: if (n && elen >= MLEN) {
1355: MCLGET(n, M_DONTWAIT);
1356: if ((n->m_flags & M_EXT) == 0) {
1357: m_free(n);
1358: n = NULL;
1359: }
1360: }
1361: if (!n)
1362: return NULL;
1363:
1364: n->m_len = 0;
1365: if (elen >= M_TRAILINGSPACE(n)) {
1366: m_free(n);
1367: return NULL;
1368: }
1369:
1.97 christos 1370: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1371: n->m_len = elen;
1372: return n;
1.2 itojun 1373: }
1374:
1375: /*
1376: * Get pointer to the previous header followed by the header
1377: * currently processed.
1378: * XXX: This function supposes that
1379: * M includes all headers,
1380: * the next header field and the header length field of each header
1381: * are valid, and
1382: * the sum of each header length equals to OFF.
1383: * Because of these assumptions, this function must be called very
1384: * carefully. Moreover, it will not be used in the near future when
1385: * we develop `neater' mechanism to process extension headers.
1386: */
1.58 itojun 1387: u_int8_t *
1.107 christos 1388: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1389: {
1390: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1391:
1392: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1393: return (&ip6->ip6_nxt);
1.2 itojun 1394: else {
1395: int len, nxt;
1396: struct ip6_ext *ip6e = NULL;
1397:
1398: nxt = ip6->ip6_nxt;
1399: len = sizeof(struct ip6_hdr);
1400: while (len < off) {
1.97 christos 1401: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1402:
1.35 itojun 1403: switch (nxt) {
1.2 itojun 1404: case IPPROTO_FRAGMENT:
1405: len += sizeof(struct ip6_frag);
1406: break;
1407: case IPPROTO_AH:
1408: len += (ip6e->ip6e_len + 2) << 2;
1409: break;
1410: default:
1411: len += (ip6e->ip6e_len + 1) << 3;
1412: break;
1413: }
1414: nxt = ip6e->ip6e_nxt;
1415: }
1416: if (ip6e)
1.58 itojun 1417: return (&ip6e->ip6e_nxt);
1.2 itojun 1418: else
1419: return NULL;
1.18 itojun 1420: }
1421: }
1422:
1423: /*
1424: * get next header offset. m will be retained.
1425: */
1426: int
1.107 christos 1427: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1428: {
1429: struct ip6_hdr ip6;
1430: struct ip6_ext ip6e;
1431: struct ip6_frag fh;
1432:
1433: /* just in case */
1434: if (m == NULL)
1435: panic("ip6_nexthdr: m == NULL");
1436: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1437: return -1;
1438:
1439: switch (proto) {
1440: case IPPROTO_IPV6:
1.83 rpaulo 1441: /* do not chase beyond intermediate IPv6 headers */
1442: if (off != 0)
1443: return -1;
1.18 itojun 1444: if (m->m_pkthdr.len < off + sizeof(ip6))
1445: return -1;
1.97 christos 1446: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1447: if (nxtp)
1448: *nxtp = ip6.ip6_nxt;
1449: off += sizeof(ip6);
1450: return off;
1451:
1452: case IPPROTO_FRAGMENT:
1453: /*
1454: * terminate parsing if it is not the first fragment,
1455: * it does not make sense to parse through it.
1456: */
1457: if (m->m_pkthdr.len < off + sizeof(fh))
1458: return -1;
1.97 christos 1459: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1460: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1461: return -1;
1462: if (nxtp)
1463: *nxtp = fh.ip6f_nxt;
1464: off += sizeof(struct ip6_frag);
1465: return off;
1466:
1467: case IPPROTO_AH:
1468: if (m->m_pkthdr.len < off + sizeof(ip6e))
1469: return -1;
1.97 christos 1470: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1471: if (nxtp)
1472: *nxtp = ip6e.ip6e_nxt;
1473: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1474: if (m->m_pkthdr.len < off)
1475: return -1;
1.18 itojun 1476: return off;
1477:
1478: case IPPROTO_HOPOPTS:
1479: case IPPROTO_ROUTING:
1480: case IPPROTO_DSTOPTS:
1481: if (m->m_pkthdr.len < off + sizeof(ip6e))
1482: return -1;
1.97 christos 1483: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1484: if (nxtp)
1485: *nxtp = ip6e.ip6e_nxt;
1486: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1487: if (m->m_pkthdr.len < off)
1488: return -1;
1.18 itojun 1489: return off;
1490:
1491: case IPPROTO_NONE:
1492: case IPPROTO_ESP:
1493: case IPPROTO_IPCOMP:
1494: /* give up */
1495: return -1;
1496:
1497: default:
1498: return -1;
1499: }
1500: }
1501:
1502: /*
1503: * get offset for the last header in the chain. m will be kept untainted.
1504: */
1505: int
1.107 christos 1506: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1507: {
1508: int newoff;
1509: int nxt;
1510:
1511: if (!nxtp) {
1512: nxt = -1;
1513: nxtp = &nxt;
1514: }
1.86 rpaulo 1515: for (;;) {
1.18 itojun 1516: newoff = ip6_nexthdr(m, off, proto, nxtp);
1517: if (newoff < 0)
1518: return off;
1519: else if (newoff < off)
1520: return -1; /* invalid */
1521: else if (newoff == off)
1522: return newoff;
1523:
1524: off = newoff;
1525: proto = *nxtp;
1.2 itojun 1526: }
1527: }
1528:
1.81 rpaulo 1529: struct m_tag *
1.107 christos 1530: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1531: {
1532: struct m_tag *mtag;
1533:
1534: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1535: if (!mtag) {
1536: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1537: M_NOWAIT);
1538: if (mtag) {
1539: m_tag_prepend(m, mtag);
1.124 cegger 1540: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1541: }
1542: }
1543: return mtag;
1544: }
1545:
1546: struct m_tag *
1.107 christos 1547: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1548: {
1549: struct m_tag *mtag;
1550:
1551: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1552: return mtag;
1553: }
1554:
1555: void
1.107 christos 1556: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1557: {
1558: struct m_tag *mtag;
1559:
1560: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1561: if (mtag)
1562: m_tag_delete(m, mtag);
1563: }
1564:
1.98 liamjfoy 1565: #ifdef GATEWAY
1566: /*
1567: * sysctl helper routine for net.inet.ip6.maxflows. Since
1568: * we could reduce this value, call ip6flow_reap();
1569: */
1570: static int
1.101 liamjfoy 1571: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.98 liamjfoy 1572: {
1.121 simonb 1573: int error;
1.98 liamjfoy 1574:
1.121 simonb 1575: error = sysctl_lookup(SYSCTLFN_CALL(rnode));
1576: if (error || newp == NULL)
1577: return (error);
1.98 liamjfoy 1578:
1.121 simonb 1579: mutex_enter(softnet_lock);
1.122 matt 1580: KERNEL_LOCK(1, NULL);
1.120 matt 1581:
1.121 simonb 1582: ip6flow_reap(0);
1.120 matt 1583:
1584: KERNEL_UNLOCK_ONE(NULL);
1.121 simonb 1585: mutex_exit(softnet_lock);
1.98 liamjfoy 1586:
1.121 simonb 1587: return (0);
1.98 liamjfoy 1588: }
1.99 liamjfoy 1589:
1590: static int
1591: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1592: {
1593: int error, tmp;
1594: struct sysctlnode node;
1595:
1596: node = *rnode;
1597: tmp = ip6_hashsize;
1598: node.sysctl_data = &tmp;
1599: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1600: if (error || newp == NULL)
1601: return (error);
1602:
1603: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1604: /*
1605: * Can only fail due to malloc()
1606: */
1.120 matt 1607: mutex_enter(softnet_lock);
1.122 matt 1608: KERNEL_LOCK(1, NULL);
1.120 matt 1609:
1610: error = ip6flow_invalidate_all(tmp);
1611:
1612: KERNEL_UNLOCK_ONE(NULL);
1613: mutex_exit(softnet_lock);
1.99 liamjfoy 1614: } else {
1615: /*
1616: * EINVAL if not a power of 2
1.121 simonb 1617: */
1.120 matt 1618: error = EINVAL;
1.99 liamjfoy 1619: }
1620:
1.120 matt 1621: return error;
1.99 liamjfoy 1622: }
1.98 liamjfoy 1623: #endif /* GATEWAY */
1624:
1.2 itojun 1625: /*
1626: * System control for IP6
1627: */
1628:
1.120 matt 1629: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1630: 0, 0, 0, 0,
1631: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1632: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1633: EMSGSIZE, EHOSTUNREACH, 0, 0,
1634: 0, 0, 0, 0,
1635: ENOPROTOOPT
1636: };
1637:
1.116 thorpej 1638: static int
1639: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1640: {
1641:
1.119 thorpej 1642: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1643: }
1644:
1.128 pooka 1645: static void
1646: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1647: {
1.85 rpaulo 1648: #ifdef RFC2292
1649: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1650: #else
1651: #define IS2292(x, y) (y)
1652: #endif
1.26 itojun 1653:
1.73 atatat 1654: sysctl_createv(clog, 0, NULL, NULL,
1655: CTLFLAG_PERMANENT,
1.70 atatat 1656: CTLTYPE_NODE, "net", NULL,
1657: NULL, 0, NULL, 0,
1658: CTL_NET, CTL_EOL);
1.73 atatat 1659: sysctl_createv(clog, 0, NULL, NULL,
1660: CTLFLAG_PERMANENT,
1.74 atatat 1661: CTLTYPE_NODE, "inet6",
1662: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1663: NULL, 0, NULL, 0,
1664: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1665: sysctl_createv(clog, 0, NULL, NULL,
1666: CTLFLAG_PERMANENT,
1.74 atatat 1667: CTLTYPE_NODE, "ip6",
1668: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1669: NULL, 0, NULL, 0,
1670: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1671:
1.73 atatat 1672: sysctl_createv(clog, 0, NULL, NULL,
1673: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1674: CTLTYPE_INT, "forwarding",
1675: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1676: NULL, 0, &ip6_forwarding, 0,
1677: CTL_NET, PF_INET6, IPPROTO_IPV6,
1678: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1679: sysctl_createv(clog, 0, NULL, NULL,
1680: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1681: CTLTYPE_INT, "redirect",
1682: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1683: NULL, 0, &ip6_sendredirects, 0,
1684: CTL_NET, PF_INET6, IPPROTO_IPV6,
1685: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1686: sysctl_createv(clog, 0, NULL, NULL,
1687: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1688: CTLTYPE_INT, "hlim",
1689: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1690: NULL, 0, &ip6_defhlim, 0,
1691: CTL_NET, PF_INET6, IPPROTO_IPV6,
1692: IPV6CTL_DEFHLIM, CTL_EOL);
1693: #ifdef notyet
1.73 atatat 1694: sysctl_createv(clog, 0, NULL, NULL,
1695: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1696: CTLTYPE_INT, "mtu", NULL,
1697: NULL, 0, &, 0,
1698: CTL_NET, PF_INET6, IPPROTO_IPV6,
1699: IPV6CTL_DEFMTU, CTL_EOL);
1700: #endif
1701: #ifdef __no_idea__
1.73 atatat 1702: sysctl_createv(clog, 0, NULL, NULL,
1703: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1704: CTLTYPE_INT, "forwsrcrt", NULL,
1705: NULL, 0, &?, 0,
1706: CTL_NET, PF_INET6, IPPROTO_IPV6,
1707: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1708: sysctl_createv(clog, 0, NULL, NULL,
1709: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1710: CTLTYPE_STRUCT, "mrtstats", NULL,
1711: NULL, 0, &?, sizeof(?),
1712: CTL_NET, PF_INET6, IPPROTO_IPV6,
1713: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1714: sysctl_createv(clog, 0, NULL, NULL,
1715: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1716: CTLTYPE_?, "mrtproto", NULL,
1717: NULL, 0, &?, sizeof(?),
1718: CTL_NET, PF_INET6, IPPROTO_IPV6,
1719: IPV6CTL_MRTPROTO, CTL_EOL);
1720: #endif
1.73 atatat 1721: sysctl_createv(clog, 0, NULL, NULL,
1722: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1723: CTLTYPE_INT, "maxfragpackets",
1724: SYSCTL_DESCR("Maximum number of fragments to buffer "
1725: "for reassembly"),
1.70 atatat 1726: NULL, 0, &ip6_maxfragpackets, 0,
1727: CTL_NET, PF_INET6, IPPROTO_IPV6,
1728: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1729: #ifdef __no_idea__
1.73 atatat 1730: sysctl_createv(clog, 0, NULL, NULL,
1731: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1732: CTLTYPE_INT, "sourcecheck", NULL,
1733: NULL, 0, &?, 0,
1734: CTL_NET, PF_INET6, IPPROTO_IPV6,
1735: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1736: sysctl_createv(clog, 0, NULL, NULL,
1737: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1738: CTLTYPE_INT, "sourcecheck_logint", NULL,
1739: NULL, 0, &?, 0,
1740: CTL_NET, PF_INET6, IPPROTO_IPV6,
1741: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1742: #endif
1.73 atatat 1743: sysctl_createv(clog, 0, NULL, NULL,
1744: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1745: CTLTYPE_INT, "accept_rtadv",
1746: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1747: NULL, 0, &ip6_accept_rtadv, 0,
1748: CTL_NET, PF_INET6, IPPROTO_IPV6,
1749: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1750: sysctl_createv(clog, 0, NULL, NULL,
1751: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1752: CTLTYPE_INT, "rtadv_maxroutes",
1753: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1754: NULL, 0, &ip6_rtadv_maxroutes, 0,
1755: CTL_NET, PF_INET6, IPPROTO_IPV6,
1756: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1757: sysctl_createv(clog, 0, NULL, NULL,
1758: CTLFLAG_PERMANENT,
1759: CTLTYPE_INT, "rtadv_numroutes",
1760: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1761: NULL, 0, &nd6_numroutes, 0,
1762: CTL_NET, PF_INET6, IPPROTO_IPV6,
1763: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1764: sysctl_createv(clog, 0, NULL, NULL,
1765: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1766: CTLTYPE_INT, "keepfaith",
1767: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1768: NULL, 0, &ip6_keepfaith, 0,
1769: CTL_NET, PF_INET6, IPPROTO_IPV6,
1770: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1771: sysctl_createv(clog, 0, NULL, NULL,
1772: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1773: CTLTYPE_INT, "log_interval",
1774: SYSCTL_DESCR("Minumum interval between logging "
1775: "unroutable packets"),
1.70 atatat 1776: NULL, 0, &ip6_log_interval, 0,
1777: CTL_NET, PF_INET6, IPPROTO_IPV6,
1778: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1779: sysctl_createv(clog, 0, NULL, NULL,
1780: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1781: CTLTYPE_INT, "hdrnestlimit",
1782: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1783: NULL, 0, &ip6_hdrnestlimit, 0,
1784: CTL_NET, PF_INET6, IPPROTO_IPV6,
1785: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1786: sysctl_createv(clog, 0, NULL, NULL,
1787: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1788: CTLTYPE_INT, "dad_count",
1789: SYSCTL_DESCR("Number of Duplicate Address Detection "
1790: "probes to send"),
1.70 atatat 1791: NULL, 0, &ip6_dad_count, 0,
1792: CTL_NET, PF_INET6, IPPROTO_IPV6,
1793: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1794: sysctl_createv(clog, 0, NULL, NULL,
1795: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1796: CTLTYPE_INT, "auto_flowlabel",
1797: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1798: NULL, 0, &ip6_auto_flowlabel, 0,
1799: CTL_NET, PF_INET6, IPPROTO_IPV6,
1800: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1801: sysctl_createv(clog, 0, NULL, NULL,
1802: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1803: CTLTYPE_INT, "defmcasthlim",
1804: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1805: NULL, 0, &ip6_defmcasthlim, 0,
1806: CTL_NET, PF_INET6, IPPROTO_IPV6,
1807: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1808: #if NGIF > 0
1.73 atatat 1809: sysctl_createv(clog, 0, NULL, NULL,
1810: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1811: CTLTYPE_INT, "gifhlim",
1812: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1813: NULL, 0, &ip6_gif_hlim, 0,
1814: CTL_NET, PF_INET6, IPPROTO_IPV6,
1815: IPV6CTL_GIF_HLIM, CTL_EOL);
1816: #endif /* NGIF */
1.73 atatat 1817: sysctl_createv(clog, 0, NULL, NULL,
1818: CTLFLAG_PERMANENT,
1.74 atatat 1819: CTLTYPE_STRING, "kame_version",
1820: SYSCTL_DESCR("KAME Version"),
1.78 christos 1821: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1822: CTL_NET, PF_INET6, IPPROTO_IPV6,
1823: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1824: sysctl_createv(clog, 0, NULL, NULL,
1825: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1826: CTLTYPE_INT, "use_deprecated",
1827: SYSCTL_DESCR("Allow use of deprecated addresses as "
1828: "source addresses"),
1.70 atatat 1829: NULL, 0, &ip6_use_deprecated, 0,
1830: CTL_NET, PF_INET6, IPPROTO_IPV6,
1831: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1832: sysctl_createv(clog, 0, NULL, NULL,
1833: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1834: CTLTYPE_INT, "rr_prune", NULL,
1835: NULL, 0, &ip6_rr_prune, 0,
1836: CTL_NET, PF_INET6, IPPROTO_IPV6,
1837: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1838: sysctl_createv(clog, 0, NULL, NULL,
1839: CTLFLAG_PERMANENT
1.70 atatat 1840: #ifndef INET6_BINDV6ONLY
1.73 atatat 1841: |CTLFLAG_READWRITE,
1.70 atatat 1842: #endif
1.74 atatat 1843: CTLTYPE_INT, "v6only",
1844: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1845: "to PF_INET sockets"),
1.70 atatat 1846: NULL, 0, &ip6_v6only, 0,
1847: CTL_NET, PF_INET6, IPPROTO_IPV6,
1848: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1849: sysctl_createv(clog, 0, NULL, NULL,
1850: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1851: CTLTYPE_INT, "anonportmin",
1852: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1853: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1854: CTL_NET, PF_INET6, IPPROTO_IPV6,
1855: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1856: sysctl_createv(clog, 0, NULL, NULL,
1857: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1858: CTLTYPE_INT, "anonportmax",
1859: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1860: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1861: CTL_NET, PF_INET6, IPPROTO_IPV6,
1862: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1863: #ifndef IPNOPRIVPORTS
1.73 atatat 1864: sysctl_createv(clog, 0, NULL, NULL,
1865: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1866: CTLTYPE_INT, "lowportmin",
1867: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1868: "to assign"),
1.70 atatat 1869: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1870: CTL_NET, PF_INET6, IPPROTO_IPV6,
1871: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1872: sysctl_createv(clog, 0, NULL, NULL,
1873: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1874: CTLTYPE_INT, "lowportmax",
1875: SYSCTL_DESCR("Highest privileged ephemeral port number "
1876: "to assign"),
1.70 atatat 1877: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1878: CTL_NET, PF_INET6, IPPROTO_IPV6,
1879: IPV6CTL_LOWPORTMAX, CTL_EOL);
1880: #endif /* IPNOPRIVPORTS */
1.73 atatat 1881: sysctl_createv(clog, 0, NULL, NULL,
1882: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1883: CTLTYPE_INT, "use_tempaddr",
1884: SYSCTL_DESCR("Use temporary address"),
1885: NULL, 0, &ip6_use_tempaddr, 0,
1886: CTL_NET, PF_INET6, IPPROTO_IPV6,
1887: CTL_CREATE, CTL_EOL);
1888: sysctl_createv(clog, 0, NULL, NULL,
1889: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1890: CTLTYPE_INT, "temppltime",
1891: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1892: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1893: CTL_NET, PF_INET6, IPPROTO_IPV6,
1894: CTL_CREATE, CTL_EOL);
1895: sysctl_createv(clog, 0, NULL, NULL,
1896: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1897: CTLTYPE_INT, "tempvltime",
1898: SYSCTL_DESCR("valid lifetime of a temporary address"),
1899: NULL, 0, &ip6_temp_valid_lifetime, 0,
1900: CTL_NET, PF_INET6, IPPROTO_IPV6,
1901: CTL_CREATE, CTL_EOL);
1902: sysctl_createv(clog, 0, NULL, NULL,
1903: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1904: CTLTYPE_INT, "maxfrags",
1905: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1906: NULL, 0, &ip6_maxfrags, 0,
1907: CTL_NET, PF_INET6, IPPROTO_IPV6,
1908: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1909: sysctl_createv(clog, 0, NULL, NULL,
1910: CTLFLAG_PERMANENT,
1911: CTLTYPE_STRUCT, "stats",
1912: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1913: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1914: CTL_NET, PF_INET6, IPPROTO_IPV6,
1915: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1916: sysctl_createv(clog, 0, NULL, NULL,
1917: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1918: CTLTYPE_INT, "use_defaultzone",
1919: SYSCTL_DESCR("Whether to use the default scope zones"),
1920: NULL, 0, &ip6_use_defzone, 0,
1921: CTL_NET, PF_INET6, IPPROTO_IPV6,
1922: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1923: sysctl_createv(clog, 0, NULL, NULL,
1924: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1925: CTLTYPE_INT, "mcast_pmtu",
1926: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1927: NULL, 0, &ip6_mcast_pmtu, 0,
1928: CTL_NET, PF_INET6, IPPROTO_IPV6,
1929: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1930: #ifdef GATEWAY
1931: sysctl_createv(clog, 0, NULL, NULL,
1932: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1933: CTLTYPE_INT, "maxflows",
1934: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.101 liamjfoy 1935: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1936: CTL_NET, PF_INET6, IPPROTO_IPV6,
1937: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1938: sysctl_createv(clog, 0, NULL, NULL,
1939: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1940: CTLTYPE_INT, "hashsize",
1941: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1942: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1943: CTL_NET, PF_INET6, IPPROTO_IPV6,
1944: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1945: #endif
1.138 christos 1946: /* anonportalgo RFC6056 subtree */
1.140 christos 1947: const struct sysctlnode *portalgo_node;
1948: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1949: CTLFLAG_PERMANENT,
1950: CTLTYPE_NODE, "anonportalgo",
1951: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1952: NULL, 0, NULL, 0,
1953: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1954: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1955: CTLFLAG_PERMANENT,
1956: CTLTYPE_STRING, "available",
1957: SYSCTL_DESCR("available algorithms"),
1.140 christos 1958: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1959: CTL_CREATE, CTL_EOL);
1.140 christos 1960: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1961: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1962: CTLTYPE_STRING, "selected",
1963: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1964: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1965: CTL_CREATE, CTL_EOL);
1.141 christos 1966: sysctl_createv(clog, 0, &portalgo_node, NULL,
1967: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1968: CTLTYPE_STRUCT, "reserve",
1969: SYSCTL_DESCR("bitmap of reserved ports"),
1970: sysctl_portalgo_reserve6, 0, NULL, 0,
1971: CTL_CREATE, CTL_EOL);
1.139 christos 1972: sysctl_createv(clog, 0, NULL, NULL,
1973: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1974: CTLTYPE_INT, "neighborgcthresh",
1975: SYSCTL_DESCR("Maximum number of entries in neighbor"
1976: " cache"),
1977: NULL, 1, &ip6_neighborgcthresh, 0,
1978: CTL_NET, PF_INET6, IPPROTO_IPV6,
1979: CTL_CREATE, CTL_EOL);
1980: sysctl_createv(clog, 0, NULL, NULL,
1981: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1982: CTLTYPE_INT, "maxifprefixes",
1983: SYSCTL_DESCR("Maximum number of prefixes created by"
1984: " route advertisement per interface"),
1985: NULL, 1, &ip6_maxifprefixes, 0,
1986: CTL_NET, PF_INET6, IPPROTO_IPV6,
1987: CTL_CREATE, CTL_EOL);
1988: sysctl_createv(clog, 0, NULL, NULL,
1989: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1990: CTLTYPE_INT, "maxifdefrouters",
1991: SYSCTL_DESCR("Maximum number of default routers created"
1992: " by route advertisement per interface"),
1993: NULL, 1, &ip6_maxifdefrouters, 0,
1994: CTL_NET, PF_INET6, IPPROTO_IPV6,
1995: CTL_CREATE, CTL_EOL);
1996: sysctl_createv(clog, 0, NULL, NULL,
1997: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1998: CTLTYPE_INT, "maxdynroutes",
1999: SYSCTL_DESCR("Maximum number of routes created via"
2000: " redirect"),
2001: NULL, 1, &ip6_maxdynroutes, 0,
2002: CTL_NET, PF_INET6, IPPROTO_IPV6,
2003: CTL_CREATE, CTL_EOL);
1.2 itojun 2004: }
1.116 thorpej 2005:
2006: void
2007: ip6_statinc(u_int stat)
2008: {
2009:
2010: KASSERT(stat < IP6_NSTATS);
2011: IP6_STATINC(stat);
2012: }
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