Annotation of src/sys/netinet6/ip6_input.c, Revision 1.149.4.3
1.149.4.3! skrll 1: /* $NetBSD: ip6_input.c,v 1.149.4.2 2015/09/22 12:06:11 skrll Exp $ */
1.40 itojun 2: /* $KAME: ip6_input.c,v 1.188 2001/03/29 05:34:31 itojun Exp $ */
1.3 thorpej 3:
1.2 itojun 4: /*
5: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6: * All rights reserved.
1.21 itojun 7: *
1.2 itojun 8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the project nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
1.21 itojun 19: *
1.2 itojun 20: * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: /*
34: * Copyright (c) 1982, 1986, 1988, 1993
35: * The Regents of the University of California. All rights reserved.
36: *
37: * Redistribution and use in source and binary forms, with or without
38: * modification, are permitted provided that the following conditions
39: * are met:
40: * 1. Redistributions of source code must retain the above copyright
41: * notice, this list of conditions and the following disclaimer.
42: * 2. Redistributions in binary form must reproduce the above copyright
43: * notice, this list of conditions and the following disclaimer in the
44: * documentation and/or other materials provided with the distribution.
1.65 agc 45: * 3. Neither the name of the University nor the names of its contributors
1.2 itojun 46: * may be used to endorse or promote products derived from this software
47: * without specific prior written permission.
48: *
49: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59: * SUCH DAMAGE.
60: *
61: * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
62: */
1.48 lukem 63:
64: #include <sys/cdefs.h>
1.149.4.3! skrll 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.149.4.2 2015/09/22 12:06:11 skrll Exp $");
1.2 itojun 66:
1.149.4.2 skrll 67: #ifdef _KERNEL_OPT
1.129 joerg 68: #include "opt_gateway.h"
1.2 itojun 69: #include "opt_inet.h"
1.85 rpaulo 70: #include "opt_inet6.h"
1.4 thorpej 71: #include "opt_ipsec.h"
1.123 christos 72: #include "opt_compat_netbsd.h"
1.149.4.2 skrll 73: #endif
1.2 itojun 74:
75: #include <sys/param.h>
76: #include <sys/systm.h>
77: #include <sys/malloc.h>
78: #include <sys/mbuf.h>
79: #include <sys/domain.h>
80: #include <sys/protosw.h>
81: #include <sys/socket.h>
82: #include <sys/socketvar.h>
83: #include <sys/errno.h>
84: #include <sys/time.h>
85: #include <sys/kernel.h>
86: #include <sys/syslog.h>
87: #include <sys/proc.h>
1.46 simonb 88: #include <sys/sysctl.h>
1.133 tls 89: #include <sys/cprng.h>
1.2 itojun 90:
91: #include <net/if.h>
92: #include <net/if_types.h>
93: #include <net/if_dl.h>
94: #include <net/route.h>
1.148 rmind 95: #include <net/pktqueue.h>
1.15 darrenr 96: #include <net/pfil.h>
1.2 itojun 97:
98: #include <netinet/in.h>
1.9 itojun 99: #include <netinet/in_systm.h>
100: #ifdef INET
101: #include <netinet/ip.h>
1.148 rmind 102: #include <netinet/ip_var.h>
1.9 itojun 103: #include <netinet/ip_icmp.h>
1.45 itojun 104: #endif /* INET */
1.14 itojun 105: #include <netinet/ip6.h>
1.140 christos 106: #include <netinet/portalgo.h>
1.2 itojun 107: #include <netinet6/in6_var.h>
1.11 itojun 108: #include <netinet6/ip6_var.h>
1.116 thorpej 109: #include <netinet6/ip6_private.h>
1.2 itojun 110: #include <netinet6/in6_pcb.h>
1.14 itojun 111: #include <netinet/icmp6.h>
1.81 rpaulo 112: #include <netinet6/scope6_var.h>
1.2 itojun 113: #include <netinet6/in6_ifattach.h>
114: #include <netinet6/nd6.h>
115:
1.142 christos 116: #ifdef IPSEC
1.94 degroote 117: #include <netipsec/ipsec.h>
118: #include <netipsec/ipsec6.h>
119: #include <netipsec/key.h>
1.142 christos 120: #endif /* IPSEC */
1.94 degroote 121:
1.123 christos 122: #ifdef COMPAT_50
123: #include <compat/sys/time.h>
124: #include <compat/sys/socket.h>
125: #endif
126:
1.2 itojun 127: #include <netinet6/ip6protosw.h>
128:
129: #include "faith.h"
130: #include "gif.h"
1.50 itojun 131:
132: #if NGIF > 0
133: #include <netinet6/in6_gif.h>
134: #endif
1.2 itojun 135:
1.9 itojun 136: #include <net/net_osdep.h>
137:
1.2 itojun 138: extern struct domain inet6domain;
139:
140: u_char ip6_protox[IPPROTO_MAX];
141: struct in6_ifaddr *in6_ifaddr;
1.148 rmind 142: pktqueue_t *ip6_pktq __read_mostly;
1.2 itojun 143:
1.108 ad 144: extern callout_t in6_tmpaddrtimer_ch;
1.83 rpaulo 145:
1.2 itojun 146: int ip6_forward_srcrt; /* XXX */
147: int ip6_sourcecheck; /* XXX */
148: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 149:
1.143 rmind 150: pfil_head_t *inet6_pfil_hook;
1.29 thorpej 151:
1.116 thorpej 152: percpu_t *ip6stat_percpu;
1.2 itojun 153:
1.111 dyoung 154: static void ip6_init2(void *);
1.148 rmind 155: static void ip6intr(void *);
1.112 dyoung 156: static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *);
1.2 itojun 157:
1.136 drochner 158: static int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
159: u_int32_t *);
1.111 dyoung 160: static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
1.128 pooka 161: static void sysctl_net_inet6_ip6_setup(struct sysctllog **);
1.2 itojun 162:
163: /*
164: * IP6 initialization: fill in IP6 protocol switch table.
165: * All protocols not implemented in kernel go to raw IP6 protocol handler.
166: */
167: void
1.114 matt 168: ip6_init(void)
1.2 itojun 169: {
1.78 christos 170: const struct ip6protosw *pr;
1.35 itojun 171: int i;
1.2 itojun 172:
1.128 pooka 173: sysctl_net_inet6_ip6_setup(NULL);
1.78 christos 174: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2 itojun 175: if (pr == 0)
176: panic("ip6_init");
177: for (i = 0; i < IPPROTO_MAX; i++)
178: ip6_protox[i] = pr - inet6sw;
1.78 christos 179: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
180: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2 itojun 181: if (pr->pr_domain->dom_family == PF_INET6 &&
182: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
183: ip6_protox[pr->pr_protocol] = pr - inet6sw;
1.148 rmind 184:
1.149 ozaki-r 185: ip6_pktq = pktq_create(IFQ_MAXLEN, ip6intr, NULL);
1.148 rmind 186: KASSERT(ip6_pktq != NULL);
187:
1.81 rpaulo 188: scope6_init();
189: addrsel_policy_init();
1.2 itojun 190: nd6_init();
191: frag6_init();
1.133 tls 192: ip6_desync_factor = cprng_fast32() % MAX_TEMP_DESYNC_FACTOR;
1.2 itojun 193:
1.135 christos 194: ip6_init2(NULL);
1.98 liamjfoy 195: #ifdef GATEWAY
1.99 liamjfoy 196: ip6flow_init(ip6_hashsize);
1.98 liamjfoy 197: #endif
1.29 thorpej 198: /* Register our Packet Filter hook. */
1.143 rmind 199: inet6_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET6);
200: KASSERT(inet6_pfil_hook != NULL);
1.116 thorpej 201:
202: ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS);
1.2 itojun 203: }
204:
205: static void
1.90 christos 206: ip6_init2(void *dummy)
1.2 itojun 207: {
208:
209: /* nd6_timer_init */
1.118 ad 210: callout_init(&nd6_timer_ch, CALLOUT_MPSAFE);
1.19 thorpej 211: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83 rpaulo 212:
213: /* timer for regeneranation of temporary addresses randomize ID */
1.118 ad 214: callout_init(&in6_tmpaddrtimer_ch, CALLOUT_MPSAFE);
1.83 rpaulo 215: callout_reset(&in6_tmpaddrtimer_ch,
216: (ip6_temp_preferred_lifetime - ip6_desync_factor -
217: ip6_temp_regen_advance) * hz,
218: in6_tmpaddrtimer, NULL);
1.2 itojun 219: }
220:
221: /*
222: * IP6 input interrupt handling. Just pass the packet to ip6_input.
223: */
1.148 rmind 224: static void
225: ip6intr(void *arg __unused)
1.2 itojun 226: {
227: struct mbuf *m;
228:
1.118 ad 229: mutex_enter(softnet_lock);
1.148 rmind 230: while ((m = pktq_dequeue(ip6_pktq)) != NULL) {
231: const ifnet_t *ifp = m->m_pkthdr.rcvif;
232:
233: /*
234: * Drop the packet if IPv6 is disabled on the interface.
235: */
236: if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) {
1.83 rpaulo 237: m_freem(m);
1.148 rmind 238: continue;
1.83 rpaulo 239: }
1.2 itojun 240: ip6_input(m);
241: }
1.118 ad 242: mutex_exit(softnet_lock);
1.2 itojun 243: }
244:
1.103 dyoung 245: extern struct route ip6_forward_rt;
1.2 itojun 246:
247: void
1.96 dyoung 248: ip6_input(struct mbuf *m)
1.2 itojun 249: {
1.9 itojun 250: struct ip6_hdr *ip6;
1.105 dyoung 251: int hit, off = sizeof(struct ip6_hdr), nest;
1.2 itojun 252: u_int32_t plen;
1.5 itojun 253: u_int32_t rtalert = ~0;
1.104 yamt 254: int nxt, ours = 0, rh_present = 0;
1.9 itojun 255: struct ifnet *deliverifp = NULL;
1.64 itojun 256: int srcrt = 0;
1.105 dyoung 257: const struct rtentry *rt;
258: union {
259: struct sockaddr dst;
260: struct sockaddr_in6 dst6;
261: } u;
1.2 itojun 262:
263: /*
1.81 rpaulo 264: * make sure we don't have onion peering information into m_tag.
265: */
266: ip6_delaux(m);
267:
268: /*
1.44 itojun 269: * mbuf statistics
1.2 itojun 270: */
271: if (m->m_flags & M_EXT) {
272: if (m->m_next)
1.116 thorpej 273: IP6_STATINC(IP6_STAT_MEXT2M);
1.2 itojun 274: else
1.116 thorpej 275: IP6_STATINC(IP6_STAT_MEXT1);
1.2 itojun 276: } else {
1.115 thorpej 277: #define M2MMAX 32
1.2 itojun 278: if (m->m_next) {
1.9 itojun 279: if (m->m_flags & M_LOOP) {
1.116 thorpej 280: /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index);
1.115 thorpej 281: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX) {
1.116 thorpej 282: IP6_STATINC(IP6_STAT_M2M +
283: m->m_pkthdr.rcvif->if_index);
1.115 thorpej 284: } else
1.116 thorpej 285: IP6_STATINC(IP6_STAT_M2M);
1.2 itojun 286: } else
1.116 thorpej 287: IP6_STATINC(IP6_STAT_M1);
1.40 itojun 288: #undef M2MMAX
1.2 itojun 289: }
290:
1.9 itojun 291: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
1.116 thorpej 292: IP6_STATINC(IP6_STAT_TOTAL);
1.9 itojun 293:
1.57 thorpej 294: /*
295: * If the IPv6 header is not aligned, slurp it up into a new
296: * mbuf with space for link headers, in the event we forward
1.81 rpaulo 297: * it. Otherwise, if it is aligned, make sure the entire base
1.57 thorpej 298: * IPv6 header is in the first mbuf of the chain.
299: */
1.97 christos 300: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57 thorpej 301: struct ifnet *inifp = m->m_pkthdr.rcvif;
302: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
303: (max_linkhdr + 3) & ~3)) == NULL) {
304: /* XXXJRT new stat, please */
1.116 thorpej 305: IP6_STATINC(IP6_STAT_TOOSMALL);
1.57 thorpej 306: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
307: return;
308: }
309: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
310: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 311: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.116 thorpej 312: IP6_STATINC(IP6_STAT_TOOSMALL);
1.9 itojun 313: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
314: return;
315: }
1.2 itojun 316: }
317:
318: ip6 = mtod(m, struct ip6_hdr *);
319:
320: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1.116 thorpej 321: IP6_STATINC(IP6_STAT_BADVERS);
1.9 itojun 322: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 323: goto bad;
324: }
1.15 darrenr 325:
1.98 liamjfoy 326: /*
327: * Assume that we can create a fast-forward IP flow entry
328: * based on this packet.
329: */
330: m->m_flags |= M_CANFASTFWD;
331:
1.15 darrenr 332: /*
333: * Run through list of hooks for input packets. If there are any
334: * filters which require that additional packets in the flow are
335: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
336: * Note that filters must _never_ set this flag, as another filter
337: * in the list may have previously cleared it.
338: */
1.39 itojun 339: /*
340: * let ipfilter look at packet on the wire,
341: * not the decapsulated packet.
342: */
1.142 christos 343: #if defined(IPSEC)
1.146 christos 344: if (!ipsec_used || !ipsec_indone(m))
1.39 itojun 345: #else
346: if (1)
347: #endif
348: {
1.64 itojun 349: struct in6_addr odst;
350:
351: odst = ip6->ip6_dst;
1.143 rmind 352: if (pfil_run_hooks(inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
1.39 itojun 353: PFIL_IN) != 0)
354: return;
355: if (m == NULL)
356: return;
357: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 358: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 359: }
1.15 darrenr 360:
1.116 thorpej 361: IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt);
1.2 itojun 362:
1.30 thorpej 363: #ifdef ALTQ
364: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
365: /* packet is dropped by traffic conditioner */
366: return;
1.9 itojun 367: }
368: #endif
369:
1.2 itojun 370: /*
1.44 itojun 371: * Check against address spoofing/corruption.
1.2 itojun 372: */
373: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
374: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 375: /*
376: * XXX: "badscope" is not very suitable for a multicast source.
377: */
1.116 thorpej 378: IP6_STATINC(IP6_STAT_BADSCOPE);
1.9 itojun 379: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 380: goto bad;
381: }
1.13 itojun 382: /*
1.44 itojun 383: * The following check is not documented in specs. A malicious
384: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
385: * and bypass security checks (act as if it was from 127.0.0.1 by using
386: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 387: *
1.44 itojun 388: * This check chokes if we are in an SIIT cloud. As none of BSDs
389: * support IPv4-less kernel compilation, we cannot support SIIT
390: * environment at all. So, it makes more sense for us to reject any
391: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 392: * partial support for SIIT environment.
1.13 itojun 393: */
394: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
395: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 396: IP6_STATINC(IP6_STAT_BADSCOPE);
1.13 itojun 397: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
398: goto bad;
399: }
1.17 itojun 400: #if 0
1.13 itojun 401: /*
1.17 itojun 402: * Reject packets with IPv4 compatible addresses (auto tunnel).
403: *
404: * The code forbids auto tunnel relay case in RFC1933 (the check is
405: * stronger than RFC1933). We may want to re-enable it if mech-xx
406: * is revised to forbid relaying case.
1.13 itojun 407: */
408: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
409: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
1.116 thorpej 410: IP6_STATINC(IP6_STAT_BADSCOPE);
1.13 itojun 411: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
412: goto bad;
413: }
414: #endif
1.35 itojun 415:
1.2 itojun 416: /*
1.82 yamt 417: * Disambiguate address scope zones (if there is ambiguity).
418: * We first make sure that the original source or destination address
419: * is not in our internal form for scoped addresses. Such addresses
420: * are not necessarily invalid spec-wise, but we cannot accept them due
421: * to the usage conflict.
422: * in6_setscope() then also checks and rejects the cases where src or
423: * dst are the loopback address and the receiving interface
1.149.4.2 skrll 424: * is not loopback.
1.82 yamt 425: */
1.88 bouyer 426: if (__predict_false(
427: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
428: goto bad;
429: ip6 = mtod(m, struct ip6_hdr *);
1.82 yamt 430: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
1.116 thorpej 431: IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */
1.82 yamt 432: goto bad;
433: }
434: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
435: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
1.116 thorpej 436: IP6_STATINC(IP6_STAT_BADSCOPE);
1.82 yamt 437: goto bad;
438: }
439:
440: /*
1.2 itojun 441: * Multicast check
442: */
443: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
444: struct in6_multi *in6m = 0;
1.9 itojun 445:
446: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 447: /*
448: * See if we belong to the destination multicast group on the
449: * arrival interface.
450: */
451: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
452: if (in6m)
453: ours = 1;
454: else if (!ip6_mrouter) {
1.116 thorpej 455: uint64_t *ip6s = IP6_STAT_GETREF();
456: ip6s[IP6_STAT_NOTMEMBER]++;
457: ip6s[IP6_STAT_CANTFORWARD]++;
458: IP6_STAT_PUTREF();
1.9 itojun 459: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 460: goto bad;
461: }
1.9 itojun 462: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 463: goto hbhcheck;
464: }
465:
1.105 dyoung 466: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
467:
1.2 itojun 468: /*
469: * Unicast check
470: */
1.105 dyoung 471: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
472: if (hit)
1.116 thorpej 473: IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT);
1.93 joerg 474: else
1.116 thorpej 475: IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS);
1.22 itojun 476:
1.109 dyoung 477: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
1.2 itojun 478:
479: /*
480: * Accept the packet if the forwarding interface to the destination
481: * according to the routing table is the loopback interface,
482: * unless the associated route has a gateway.
483: * Note that this approach causes to accept a packet if there is a
484: * route to the loopback interface for the destination of the packet.
485: * But we think it's even useful in some situations, e.g. when using
486: * a special daemon which wants to intercept the packet.
487: */
1.105 dyoung 488: if (rt != NULL &&
489: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
490: !(rt->rt_flags & RTF_CLONED) &&
1.2 itojun 491: #if 0
492: /*
493: * The check below is redundant since the comparison of
494: * the destination and the key of the rtentry has
495: * already done through looking up the routing table.
496: */
1.109 dyoung 497: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
1.2 itojun 498: #endif
1.105 dyoung 499: rt->rt_ifp->if_type == IFT_LOOP) {
500: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
1.2 itojun 501: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
502: m->m_flags |= M_ANYCAST6;
1.24 itojun 503: /*
504: * packets to a tentative, duplicated, or somehow invalid
505: * address must not be accepted.
506: */
1.2 itojun 507: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 508: /* this address is ready */
1.2 itojun 509: ours = 1;
1.9 itojun 510: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 511: goto hbhcheck;
512: } else {
1.24 itojun 513: /* address is not ready, so discard the packet. */
1.34 itojun 514: nd6log((LOG_INFO,
1.27 itojun 515: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 516: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 517: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 518:
519: goto bad;
1.2 itojun 520: }
521: }
522:
523: /*
1.55 itojun 524: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 525: */
526: #if defined(NFAITH) && 0 < NFAITH
527: if (ip6_keepfaith) {
1.105 dyoung 528: if (rt != NULL && rt->rt_ifp != NULL &&
529: rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 530: /* XXX do we need more sanity checks? */
531: ours = 1;
1.105 dyoung 532: deliverifp = rt->rt_ifp; /* faith */
1.9 itojun 533: goto hbhcheck;
534: }
535: }
536: #endif
537:
538: #if 0
539: {
540: /*
541: * Last resort: check in6_ifaddr for incoming interface.
542: * The code is here until I update the "goto ours hack" code above
543: * working right.
544: */
545: struct ifaddr *ifa;
1.113 dyoung 546: IFADDR_FOREACH(ifa, m->m_pkthdr.rcvif) {
1.9 itojun 547: if (ifa->ifa_addr == NULL)
548: continue; /* just for safety */
549: if (ifa->ifa_addr->sa_family != AF_INET6)
550: continue;
551: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
552: ours = 1;
553: deliverifp = ifa->ifa_ifp;
1.2 itojun 554: goto hbhcheck;
555: }
556: }
1.9 itojun 557: }
1.2 itojun 558: #endif
559:
560: /*
561: * Now there is no reason to process the packet if it's not our own
562: * and we're not a router.
563: */
564: if (!ip6_forwarding) {
1.116 thorpej 565: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.9 itojun 566: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 567: goto bad;
568: }
569:
570: hbhcheck:
571: /*
1.81 rpaulo 572: * record address information into m_tag, if we don't have one yet.
573: * note that we are unable to record it, if the address is not listed
574: * as our interface address (e.g. multicast addresses, addresses
575: * within FAITH prefixes and such).
576: */
1.111 dyoung 577: if (deliverifp && ip6_getdstifaddr(m) == NULL) {
1.81 rpaulo 578: struct in6_ifaddr *ia6;
579:
580: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
1.111 dyoung 581: if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) {
582: /*
583: * XXX maybe we should drop the packet here,
584: * as we could not provide enough information
585: * to the upper layers.
586: */
1.81 rpaulo 587: }
588: }
589:
590: /*
1.2 itojun 591: * Process Hop-by-Hop options header if it's contained.
592: * m may be modified in ip6_hopopts_input().
593: * If a JumboPayload option is included, plen will also be modified.
594: */
595: plen = (u_int32_t)ntohs(ip6->ip6_plen);
596: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 597: struct ip6_hbh *hbh;
598:
599: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
600: #if 0 /*touches NULL pointer*/
601: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
602: #endif
1.2 itojun 603: return; /* m have already been freed */
1.9 itojun 604: }
1.22 itojun 605:
1.2 itojun 606: /* adjust pointer */
607: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 608:
609: /*
1.49 itojun 610: * if the payload length field is 0 and the next header field
1.22 itojun 611: * indicates Hop-by-Hop Options header, then a Jumbo Payload
612: * option MUST be included.
613: */
614: if (ip6->ip6_plen == 0 && plen == 0) {
615: /*
616: * Note that if a valid jumbo payload option is
1.83 rpaulo 617: * contained, ip6_hopopts_input() must set a valid
1.55 itojun 618: * (non-zero) payload length to the variable plen.
1.22 itojun 619: */
1.116 thorpej 620: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 621: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
622: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
623: icmp6_error(m, ICMP6_PARAM_PROB,
624: ICMP6_PARAMPROB_HEADER,
1.97 christos 625: (char *)&ip6->ip6_plen - (char *)ip6);
1.22 itojun 626: return;
627: }
1.9 itojun 628: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
629: sizeof(struct ip6_hbh));
630: if (hbh == NULL) {
1.116 thorpej 631: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 632: return;
633: }
1.57 thorpej 634: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 635: nxt = hbh->ip6h_nxt;
1.2 itojun 636:
637: /*
638: * accept the packet if a router alert option is included
639: * and we act as an IPv6 router.
640: */
1.5 itojun 641: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 642: ours = 1;
643: } else
644: nxt = ip6->ip6_nxt;
645:
646: /*
647: * Check that the amount of data in the buffers
648: * is as at least much as the IPv6 header would have us expect.
649: * Trim mbufs if longer than we expect.
650: * Drop packet if shorter than we expect.
651: */
652: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
1.116 thorpej 653: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 654: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 655: goto bad;
656: }
657: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
658: if (m->m_len == m->m_pkthdr.len) {
659: m->m_len = sizeof(struct ip6_hdr) + plen;
660: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
661: } else
662: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
663: }
664:
665: /*
666: * Forward if desirable.
667: */
668: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
669: /*
670: * If we are acting as a multicast router, all
671: * incoming multicast packets are passed to the
672: * kernel-level multicast forwarding function.
673: * The packet is returned (relatively) intact; if
674: * ip6_mforward() returns a non-zero value, the packet
675: * must be discarded, else it may be accepted below.
676: */
677: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
1.116 thorpej 678: IP6_STATINC(IP6_STAT_CANTFORWARD);
1.2 itojun 679: m_freem(m);
680: return;
681: }
682: if (!ours) {
683: m_freem(m);
684: return;
685: }
1.22 itojun 686: } else if (!ours) {
1.64 itojun 687: ip6_forward(m, srcrt);
1.2 itojun 688: return;
1.56 itojun 689: }
1.25 itojun 690:
691: ip6 = mtod(m, struct ip6_hdr *);
692:
693: /*
694: * Malicious party may be able to use IPv4 mapped addr to confuse
695: * tcp/udp stack and bypass security checks (act as if it was from
696: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
697: *
698: * For SIIT end node behavior, you may want to disable the check.
699: * However, you will become vulnerable to attacks using IPv4 mapped
700: * source.
701: */
702: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
703: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
1.116 thorpej 704: IP6_STATINC(IP6_STAT_BADSCOPE);
1.25 itojun 705: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
706: goto bad;
707: }
1.2 itojun 708:
709: /*
710: * Tell launch routine the next header
711: */
1.12 itojun 712: #ifdef IFA_STATS
1.28 itojun 713: if (deliverifp != NULL) {
1.9 itojun 714: struct in6_ifaddr *ia6;
715: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
716: if (ia6)
717: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
718: }
719: #endif
1.116 thorpej 720: IP6_STATINC(IP6_STAT_DELIVERED);
1.9 itojun 721: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 722: nest = 0;
1.40 itojun 723:
1.104 yamt 724: rh_present = 0;
1.2 itojun 725: while (nxt != IPPROTO_DONE) {
726: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
1.116 thorpej 727: IP6_STATINC(IP6_STAT_TOOMANYHDR);
1.104 yamt 728: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 729: goto bad;
730: }
1.8 itojun 731:
732: /*
733: * protection against faulty packet - there should be
734: * more sanity checks in header chain processing.
735: */
736: if (m->m_pkthdr.len < off) {
1.116 thorpej 737: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 738: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 739: goto bad;
740: }
741:
1.104 yamt 742: if (nxt == IPPROTO_ROUTING) {
743: if (rh_present++) {
744: in6_ifstat_inc(m->m_pkthdr.rcvif,
745: ifs6_in_hdrerr);
1.116 thorpej 746: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.104 yamt 747: goto bad;
748: }
749: }
750:
1.142 christos 751: #ifdef IPSEC
1.146 christos 752: if (ipsec_used) {
1.94 degroote 753: /*
1.146 christos 754: * enforce IPsec policy checking if we are seeing last
755: * header. note that we do not visit this with
756: * protocols with pcb layer code - like udp/tcp/raw ip.
1.94 degroote 757: */
1.146 christos 758: if ((inet6sw[ip_protox[nxt]].pr_flags
759: & PR_LASTHDR) != 0) {
1.149.4.1 skrll 760: int error = ipsec6_input(m);
1.146 christos 761: if (error)
762: goto bad;
763: }
1.94 degroote 764: }
1.142 christos 765: #endif /* IPSEC */
1.94 degroote 766:
1.2 itojun 767: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
768: }
769: return;
770: bad:
771: m_freem(m);
772: }
773:
774: /*
1.81 rpaulo 775: * set/grab in6_ifaddr correspond to IPv6 destination address.
776: */
777: static struct m_tag *
1.112 dyoung 778: ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia)
1.81 rpaulo 779: {
780: struct m_tag *mtag;
1.144 christos 781: struct ip6aux *ip6a;
1.81 rpaulo 782:
783: mtag = ip6_addaux(m);
1.144 christos 784: if (mtag == NULL)
785: return NULL;
1.112 dyoung 786:
1.144 christos 787: ip6a = (struct ip6aux *)(mtag + 1);
788: if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) {
789: IP6_STATINC(IP6_STAT_BADSCOPE);
790: return NULL;
1.112 dyoung 791: }
1.144 christos 792:
793: ip6a->ip6a_src = ia->ia_addr.sin6_addr;
794: ip6a->ip6a_flags = ia->ia6_flags;
795: return mtag;
1.81 rpaulo 796: }
797:
1.112 dyoung 798: const struct ip6aux *
1.107 christos 799: ip6_getdstifaddr(struct mbuf *m)
1.81 rpaulo 800: {
801: struct m_tag *mtag;
802:
803: mtag = ip6_findaux(m);
1.112 dyoung 804: if (mtag != NULL)
805: return (struct ip6aux *)(mtag + 1);
1.81 rpaulo 806: else
807: return NULL;
808: }
809:
810: /*
1.2 itojun 811: * Hop-by-Hop options header processing. If a valid jumbo payload option is
812: * included, the real payload length will be stored in plenp.
1.107 christos 813: *
814: * rtalertp - XXX: should be stored more smart way
1.2 itojun 815: */
1.136 drochner 816: int
1.149.4.2 skrll 817: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
1.107 christos 818: struct mbuf **mp, int *offp)
1.2 itojun 819: {
1.35 itojun 820: struct mbuf *m = *mp;
1.2 itojun 821: int off = *offp, hbhlen;
822: struct ip6_hbh *hbh;
823:
824: /* validation of the length of the header */
1.9 itojun 825: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
826: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
827: if (hbh == NULL) {
1.116 thorpej 828: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 829: return -1;
830: }
831: hbhlen = (hbh->ip6h_len + 1) << 3;
832: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
833: hbhlen);
834: if (hbh == NULL) {
1.116 thorpej 835: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 836: return -1;
837: }
1.57 thorpej 838: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 839: off += hbhlen;
840: hbhlen -= sizeof(struct ip6_hbh);
841:
842: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
843: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 844: return (-1);
1.2 itojun 845:
846: *offp = off;
847: *mp = m;
1.58 itojun 848: return (0);
1.2 itojun 849: }
850:
851: /*
852: * Search header for all Hop-by-hop options and process each option.
853: * This function is separate from ip6_hopopts_input() in order to
854: * handle a case where the sending node itself process its hop-by-hop
855: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 856: *
857: * The function assumes that hbh header is located right after the IPv6 header
858: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
859: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 860: */
1.136 drochner 861: static int
1.149.4.2 skrll 862: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
1.107 christos 863: u_int32_t *rtalertp, u_int32_t *plenp)
1.2 itojun 864: {
865: struct ip6_hdr *ip6;
866: int optlen = 0;
867: u_int8_t *opt = opthead;
868: u_int16_t rtalert_val;
1.22 itojun 869: u_int32_t jumboplen;
1.55 itojun 870: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 871:
872: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 873: switch (*opt) {
874: case IP6OPT_PAD1:
875: optlen = 1;
876: break;
877: case IP6OPT_PADN:
878: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 879: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 880: goto bad;
881: }
882: optlen = *(opt + 1) + 2;
883: break;
884: case IP6OPT_RTALERT:
885: /* XXX may need check for alignment */
886: if (hbhlen < IP6OPT_RTALERT_LEN) {
1.116 thorpej 887: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 888: goto bad;
889: }
890: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 891: /* XXX stat */
892: icmp6_error(m, ICMP6_PARAM_PROB,
893: ICMP6_PARAMPROB_HEADER,
894: erroff + opt + 1 - opthead);
895: return (-1);
1.35 itojun 896: }
897: optlen = IP6OPT_RTALERT_LEN;
1.126 tsutsui 898: memcpy((void *)&rtalert_val, (void *)(opt + 2), 2);
1.35 itojun 899: *rtalertp = ntohs(rtalert_val);
900: break;
901: case IP6OPT_JUMBO:
1.22 itojun 902: /* XXX may need check for alignment */
903: if (hbhlen < IP6OPT_JUMBO_LEN) {
1.116 thorpej 904: IP6_STATINC(IP6_STAT_TOOSMALL);
1.22 itojun 905: goto bad;
906: }
1.35 itojun 907: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 908: /* XXX stat */
909: icmp6_error(m, ICMP6_PARAM_PROB,
910: ICMP6_PARAMPROB_HEADER,
911: erroff + opt + 1 - opthead);
912: return (-1);
1.35 itojun 913: }
1.22 itojun 914: optlen = IP6OPT_JUMBO_LEN;
915:
916: /*
917: * IPv6 packets that have non 0 payload length
1.35 itojun 918: * must not contain a jumbo payload option.
1.22 itojun 919: */
920: ip6 = mtod(m, struct ip6_hdr *);
921: if (ip6->ip6_plen) {
1.116 thorpej 922: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 923: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 924: ICMP6_PARAMPROB_HEADER,
925: erroff + opt - opthead);
926: return (-1);
1.22 itojun 927: }
1.2 itojun 928:
1.22 itojun 929: /*
930: * We may see jumbolen in unaligned location, so
931: * we'd need to perform bcopy().
932: */
1.126 tsutsui 933: memcpy(&jumboplen, opt + 2, sizeof(jumboplen));
1.22 itojun 934: jumboplen = (u_int32_t)htonl(jumboplen);
935:
936: #if 1
937: /*
938: * if there are multiple jumbo payload options,
939: * *plenp will be non-zero and the packet will be
940: * rejected.
941: * the behavior may need some debate in ipngwg -
942: * multiple options does not make sense, however,
943: * there's no explicit mention in specification.
944: */
945: if (*plenp != 0) {
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 + 2 - opthead);
950: return (-1);
1.22 itojun 951: }
1.8 itojun 952: #endif
1.2 itojun 953:
1.22 itojun 954: /*
955: * jumbo payload length must be larger than 65535.
956: */
957: if (jumboplen <= IPV6_MAXPACKET) {
1.116 thorpej 958: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.22 itojun 959: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 960: ICMP6_PARAMPROB_HEADER,
961: erroff + opt + 2 - opthead);
962: return (-1);
1.22 itojun 963: }
964: *plenp = jumboplen;
965:
966: break;
1.35 itojun 967: default: /* unknown option */
968: if (hbhlen < IP6OPT_MINLEN) {
1.116 thorpej 969: IP6_STATINC(IP6_STAT_TOOSMALL);
1.35 itojun 970: goto bad;
971: }
1.55 itojun 972: optlen = ip6_unknown_opt(opt, m,
973: erroff + opt - opthead);
974: if (optlen == -1)
975: return (-1);
1.35 itojun 976: optlen += 2;
977: break;
1.2 itojun 978: }
979: }
980:
1.55 itojun 981: return (0);
1.2 itojun 982:
983: bad:
984: m_freem(m);
1.55 itojun 985: return (-1);
1.2 itojun 986: }
987:
988: /*
989: * Unknown option processing.
990: * The third argument `off' is the offset from the IPv6 header to the option,
991: * which is necessary if the IPv6 header the and option header and IPv6 header
992: * is not continuous in order to return an ICMPv6 error.
993: */
994: int
1.107 christos 995: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
1.2 itojun 996: {
997: struct ip6_hdr *ip6;
998:
1.35 itojun 999: switch (IP6OPT_TYPE(*optp)) {
1000: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 1001: return ((int)*(optp + 1));
1.35 itojun 1002: case IP6OPT_TYPE_DISCARD: /* silently discard */
1003: m_freem(m);
1.58 itojun 1004: return (-1);
1.35 itojun 1005: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
1.116 thorpej 1006: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1007: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1008: return (-1);
1.35 itojun 1009: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
1.116 thorpej 1010: IP6_STATINC(IP6_STAT_BADOPTIONS);
1.35 itojun 1011: ip6 = mtod(m, struct ip6_hdr *);
1012: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
1013: (m->m_flags & (M_BCAST|M_MCAST)))
1014: m_freem(m);
1015: else
1016: icmp6_error(m, ICMP6_PARAM_PROB,
1017: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 1018: return (-1);
1.2 itojun 1019: }
1020:
1021: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 1022: return (-1);
1.2 itojun 1023: }
1024:
1025: /*
1.9 itojun 1026: * Create the "control" list for this pcb.
1027: *
1028: * The routine will be called from upper layer handlers like tcp6_input().
1029: * Thus the routine assumes that the caller (tcp6_input) have already
1030: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
1031: * very first mbuf on the mbuf chain.
1032: * We may want to add some infinite loop prevention or sanity checks for safety.
1033: * (This applies only when you are using KAME mbuf chain restriction, i.e.
1034: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 1035: */
1036: void
1.149.4.2 skrll 1037: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
1.107 christos 1038: struct ip6_hdr *ip6, struct mbuf *m)
1.2 itojun 1039: {
1.85 rpaulo 1040: #ifdef RFC2292
1041: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1042: #else
1043: #define IS2292(x, y) (y)
1044: #endif
1045:
1.123 christos 1046: if (in6p->in6p_socket->so_options & SO_TIMESTAMP
1047: #ifdef SO_OTIMESTAMP
1048: || in6p->in6p_socket->so_options & SO_OTIMESTAMP
1049: #endif
1050: ) {
1.2 itojun 1051: struct timeval tv;
1052:
1053: microtime(&tv);
1.123 christos 1054: #ifdef SO_OTIMESTAMP
1055: if (in6p->in6p_socket->so_options & SO_OTIMESTAMP) {
1056: struct timeval50 tv50;
1057: timeval_to_timeval50(&tv, &tv50);
1058: *mp = sbcreatecontrol((void *) &tv50, sizeof(tv50),
1059: SCM_OTIMESTAMP, SOL_SOCKET);
1060: } else
1061: #endif
1.97 christos 1062: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63 itojun 1063: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1064: if (*mp)
1065: mp = &(*mp)->m_next;
1066: }
1.87 rpaulo 1067:
1068: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
1069: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
1070: return;
1071:
1.2 itojun 1072: /* RFC 2292 sec. 5 */
1.35 itojun 1073: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1074: struct in6_pktinfo pi6;
1.85 rpaulo 1075:
1.126 tsutsui 1076: memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr));
1.81 rpaulo 1077: in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84 christos 1078: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
1079: m->m_pkthdr.rcvif->if_index : 0;
1.97 christos 1080: *mp = sbcreatecontrol((void *) &pi6,
1.85 rpaulo 1081: sizeof(struct in6_pktinfo),
1082: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2 itojun 1083: if (*mp)
1084: mp = &(*mp)->m_next;
1085: }
1.85 rpaulo 1086:
1.2 itojun 1087: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1088: int hlim = ip6->ip6_hlim & 0xff;
1.85 rpaulo 1089:
1.97 christos 1090: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85 rpaulo 1091: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
1092: if (*mp)
1093: mp = &(*mp)->m_next;
1094: }
1095:
1096: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
1097: u_int32_t flowinfo;
1098: int tclass;
1099:
1100: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
1101: flowinfo >>= 20;
1102:
1103: tclass = flowinfo & 0xff;
1.97 christos 1104: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85 rpaulo 1105: IPV6_TCLASS, IPPROTO_IPV6);
1106:
1.2 itojun 1107: if (*mp)
1108: mp = &(*mp)->m_next;
1109: }
1110:
1111: /*
1.75 itojun 1112: * IPV6_HOPOPTS socket option. Recall that we required super-user
1113: * privilege for the option (see ip6_ctloutput), but it might be too
1114: * strict, since there might be some hop-by-hop options which can be
1115: * returned to normal user.
1.85 rpaulo 1116: * See also RFC3542 section 8 (or RFC2292 section 6).
1.2 itojun 1117: */
1.75 itojun 1118: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1119: /*
1120: * Check if a hop-by-hop options header is contatined in the
1121: * received packet, and if so, store the options as ancillary
1122: * data. Note that a hop-by-hop options header must be
1123: * just after the IPv6 header, which fact is assured through
1124: * the IPv6 input processing.
1125: */
1.78 christos 1126: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1127: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1128: struct ip6_hbh *hbh;
1129: int hbhlen;
1.62 itojun 1130: struct mbuf *ext;
1.9 itojun 1131:
1.62 itojun 1132: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78 christos 1133: xip6->ip6_nxt);
1.62 itojun 1134: if (ext == NULL) {
1.116 thorpej 1135: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1136: return;
1137: }
1.62 itojun 1138: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1139: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1140: if (hbhlen != ext->m_len) {
1141: m_freem(ext);
1.116 thorpej 1142: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1143: return;
1144: }
1.2 itojun 1145:
1146: /*
1147: * XXX: We copy whole the header even if a jumbo
1148: * payload option is included, which option is to
1149: * be removed before returning in the RFC 2292.
1.85 rpaulo 1150: * Note: this constraint is removed in RFC3542.
1.2 itojun 1151: */
1.97 christos 1152: *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85 rpaulo 1153: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
1154: IPPROTO_IPV6);
1.2 itojun 1155: if (*mp)
1156: mp = &(*mp)->m_next;
1.62 itojun 1157: m_freem(ext);
1.2 itojun 1158: }
1159: }
1160:
1161: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1162: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78 christos 1163: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
1164: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1165:
1166: /*
1167: * Search for destination options headers or routing
1168: * header(s) through the header chain, and stores each
1169: * header as ancillary data.
1170: * Note that the order of the headers remains in
1171: * the chain of ancillary data.
1172: */
1.86 rpaulo 1173: for (;;) { /* is explicit loop prevention necessary? */
1.62 itojun 1174: struct ip6_ext *ip6e = NULL;
1.9 itojun 1175: int elen;
1.62 itojun 1176: struct mbuf *ext = NULL;
1.9 itojun 1177:
1.62 itojun 1178: /*
1179: * if it is not an extension header, don't try to
1180: * pull it from the chain.
1181: */
1182: switch (nxt) {
1183: case IPPROTO_DSTOPTS:
1184: case IPPROTO_ROUTING:
1185: case IPPROTO_HOPOPTS:
1186: case IPPROTO_AH: /* is it possible? */
1187: break;
1188: default:
1189: goto loopend;
1190: }
1191:
1192: ext = ip6_pullexthdr(m, off, nxt);
1193: if (ext == NULL) {
1.116 thorpej 1194: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1195: return;
1196: }
1.62 itojun 1197: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1198: if (nxt == IPPROTO_AH)
1199: elen = (ip6e->ip6e_len + 2) << 2;
1200: else
1201: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1202: if (elen != ext->m_len) {
1203: m_freem(ext);
1.116 thorpej 1204: IP6_STATINC(IP6_STAT_TOOSHORT);
1.9 itojun 1205: return;
1206: }
1.57 thorpej 1207: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1208:
1.35 itojun 1209: switch (nxt) {
1.62 itojun 1210: case IPPROTO_DSTOPTS:
1.127 martin 1211: if (!(in6p->in6p_flags & IN6P_DSTOPTS))
1.35 itojun 1212: break;
1213:
1.97 christos 1214: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1215: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
1216: IPPROTO_IPV6);
1.35 itojun 1217: if (*mp)
1218: mp = &(*mp)->m_next;
1219: break;
1220:
1221: case IPPROTO_ROUTING:
1.127 martin 1222: if (!(in6p->in6p_flags & IN6P_RTHDR))
1.35 itojun 1223: break;
1224:
1.97 christos 1225: *mp = sbcreatecontrol((void *)ip6e, elen,
1.85 rpaulo 1226: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
1227: IPPROTO_IPV6);
1.35 itojun 1228: if (*mp)
1229: mp = &(*mp)->m_next;
1230: break;
1231:
1.62 itojun 1232: case IPPROTO_HOPOPTS:
1233: case IPPROTO_AH: /* is it possible? */
1234: break;
1235:
1.35 itojun 1236: default:
1237: /*
1.62 itojun 1238: * other cases have been filtered in the above.
1239: * none will visit this case. here we supply
1240: * the code just in case (nxt overwritten or
1241: * other cases).
1.35 itojun 1242: */
1.62 itojun 1243: m_freem(ext);
1.35 itojun 1244: goto loopend;
1245:
1.2 itojun 1246: }
1247:
1248: /* proceed with the next header. */
1.9 itojun 1249: off += elen;
1.2 itojun 1250: nxt = ip6e->ip6e_nxt;
1.62 itojun 1251: ip6e = NULL;
1252: m_freem(ext);
1253: ext = NULL;
1.2 itojun 1254: }
1255: loopend:
1.62 itojun 1256: ;
1.2 itojun 1257: }
1.62 itojun 1258: }
1.85 rpaulo 1259: #undef IS2292
1260:
1261:
1262: void
1.95 dyoung 1263: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
1264: uint32_t *mtu)
1.85 rpaulo 1265: {
1266: struct socket *so;
1267: struct mbuf *m_mtu;
1268: struct ip6_mtuinfo mtuctl;
1269:
1270: so = in6p->in6p_socket;
1271:
1272: if (mtu == NULL)
1273: return;
1274:
1275: #ifdef DIAGNOSTIC
1276: if (so == NULL) /* I believe this is impossible */
1277: panic("ip6_notify_pmtu: socket is NULL");
1278: #endif
1279:
1280: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
1281: mtuctl.ip6m_mtu = *mtu;
1282: mtuctl.ip6m_addr = *dst;
1283: if (sa6_recoverscope(&mtuctl.ip6m_addr))
1284: return;
1285:
1.97 christos 1286: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85 rpaulo 1287: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
1288: return;
1289:
1.95 dyoung 1290: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85 rpaulo 1291: == 0) {
1292: m_freem(m_mtu);
1293: /* XXX: should count statistics */
1294: } else
1295: sorwakeup(so);
1296:
1297: return;
1298: }
1.62 itojun 1299:
1300: /*
1301: * pull single extension header from mbuf chain. returns single mbuf that
1302: * contains the result, or NULL on error.
1303: */
1304: static struct mbuf *
1.107 christos 1305: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1.62 itojun 1306: {
1307: struct ip6_ext ip6e;
1308: size_t elen;
1309: struct mbuf *n;
1310:
1311: #ifdef DIAGNOSTIC
1312: switch (nxt) {
1313: case IPPROTO_DSTOPTS:
1314: case IPPROTO_ROUTING:
1315: case IPPROTO_HOPOPTS:
1316: case IPPROTO_AH: /* is it possible? */
1317: break;
1318: default:
1319: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1320: }
1.62 itojun 1321: #endif
1.2 itojun 1322:
1.97 christos 1323: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62 itojun 1324: if (nxt == IPPROTO_AH)
1325: elen = (ip6e.ip6e_len + 2) << 2;
1326: else
1327: elen = (ip6e.ip6e_len + 1) << 3;
1328:
1329: MGET(n, M_DONTWAIT, MT_DATA);
1330: if (n && elen >= MLEN) {
1331: MCLGET(n, M_DONTWAIT);
1332: if ((n->m_flags & M_EXT) == 0) {
1333: m_free(n);
1334: n = NULL;
1335: }
1336: }
1337: if (!n)
1338: return NULL;
1339:
1340: n->m_len = 0;
1341: if (elen >= M_TRAILINGSPACE(n)) {
1342: m_free(n);
1343: return NULL;
1344: }
1345:
1.97 christos 1346: m_copydata(m, off, elen, mtod(n, void *));
1.62 itojun 1347: n->m_len = elen;
1348: return n;
1.2 itojun 1349: }
1350:
1351: /*
1352: * Get pointer to the previous header followed by the header
1353: * currently processed.
1354: * XXX: This function supposes that
1355: * M includes all headers,
1356: * the next header field and the header length field of each header
1357: * are valid, and
1358: * the sum of each header length equals to OFF.
1359: * Because of these assumptions, this function must be called very
1360: * carefully. Moreover, it will not be used in the near future when
1361: * we develop `neater' mechanism to process extension headers.
1362: */
1.58 itojun 1363: u_int8_t *
1.107 christos 1364: ip6_get_prevhdr(struct mbuf *m, int off)
1.2 itojun 1365: {
1366: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1367:
1368: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1369: return (&ip6->ip6_nxt);
1.2 itojun 1370: else {
1371: int len, nxt;
1372: struct ip6_ext *ip6e = NULL;
1373:
1374: nxt = ip6->ip6_nxt;
1375: len = sizeof(struct ip6_hdr);
1376: while (len < off) {
1.97 christos 1377: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2 itojun 1378:
1.35 itojun 1379: switch (nxt) {
1.2 itojun 1380: case IPPROTO_FRAGMENT:
1381: len += sizeof(struct ip6_frag);
1382: break;
1383: case IPPROTO_AH:
1384: len += (ip6e->ip6e_len + 2) << 2;
1385: break;
1386: default:
1387: len += (ip6e->ip6e_len + 1) << 3;
1388: break;
1389: }
1390: nxt = ip6e->ip6e_nxt;
1391: }
1392: if (ip6e)
1.58 itojun 1393: return (&ip6e->ip6e_nxt);
1.2 itojun 1394: else
1395: return NULL;
1.18 itojun 1396: }
1397: }
1398:
1399: /*
1400: * get next header offset. m will be retained.
1401: */
1402: int
1.107 christos 1403: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1404: {
1405: struct ip6_hdr ip6;
1406: struct ip6_ext ip6e;
1407: struct ip6_frag fh;
1408:
1409: /* just in case */
1410: if (m == NULL)
1411: panic("ip6_nexthdr: m == NULL");
1412: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1413: return -1;
1414:
1415: switch (proto) {
1416: case IPPROTO_IPV6:
1.83 rpaulo 1417: /* do not chase beyond intermediate IPv6 headers */
1418: if (off != 0)
1419: return -1;
1.18 itojun 1420: if (m->m_pkthdr.len < off + sizeof(ip6))
1421: return -1;
1.97 christos 1422: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18 itojun 1423: if (nxtp)
1424: *nxtp = ip6.ip6_nxt;
1425: off += sizeof(ip6);
1426: return off;
1427:
1428: case IPPROTO_FRAGMENT:
1429: /*
1430: * terminate parsing if it is not the first fragment,
1431: * it does not make sense to parse through it.
1432: */
1433: if (m->m_pkthdr.len < off + sizeof(fh))
1434: return -1;
1.97 christos 1435: m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67 itojun 1436: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1437: return -1;
1438: if (nxtp)
1439: *nxtp = fh.ip6f_nxt;
1440: off += sizeof(struct ip6_frag);
1441: return off;
1442:
1443: case IPPROTO_AH:
1444: if (m->m_pkthdr.len < off + sizeof(ip6e))
1445: return -1;
1.97 christos 1446: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1447: if (nxtp)
1448: *nxtp = ip6e.ip6e_nxt;
1449: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1450: if (m->m_pkthdr.len < off)
1451: return -1;
1.18 itojun 1452: return off;
1453:
1454: case IPPROTO_HOPOPTS:
1455: case IPPROTO_ROUTING:
1456: case IPPROTO_DSTOPTS:
1457: if (m->m_pkthdr.len < off + sizeof(ip6e))
1458: return -1;
1.97 christos 1459: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18 itojun 1460: if (nxtp)
1461: *nxtp = ip6e.ip6e_nxt;
1462: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1463: if (m->m_pkthdr.len < off)
1464: return -1;
1.18 itojun 1465: return off;
1466:
1467: case IPPROTO_NONE:
1468: case IPPROTO_ESP:
1469: case IPPROTO_IPCOMP:
1470: /* give up */
1471: return -1;
1472:
1473: default:
1474: return -1;
1475: }
1476: }
1477:
1478: /*
1479: * get offset for the last header in the chain. m will be kept untainted.
1480: */
1481: int
1.107 christos 1482: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1.18 itojun 1483: {
1484: int newoff;
1485: int nxt;
1486:
1487: if (!nxtp) {
1488: nxt = -1;
1489: nxtp = &nxt;
1490: }
1.86 rpaulo 1491: for (;;) {
1.18 itojun 1492: newoff = ip6_nexthdr(m, off, proto, nxtp);
1493: if (newoff < 0)
1494: return off;
1495: else if (newoff < off)
1496: return -1; /* invalid */
1497: else if (newoff == off)
1498: return newoff;
1499:
1500: off = newoff;
1501: proto = *nxtp;
1.2 itojun 1502: }
1503: }
1504:
1.81 rpaulo 1505: struct m_tag *
1.107 christos 1506: ip6_addaux(struct mbuf *m)
1.81 rpaulo 1507: {
1508: struct m_tag *mtag;
1509:
1510: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1511: if (!mtag) {
1512: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
1513: M_NOWAIT);
1514: if (mtag) {
1515: m_tag_prepend(m, mtag);
1.124 cegger 1516: memset(mtag + 1, 0, sizeof(struct ip6aux));
1.81 rpaulo 1517: }
1518: }
1519: return mtag;
1520: }
1521:
1522: struct m_tag *
1.107 christos 1523: ip6_findaux(struct mbuf *m)
1.81 rpaulo 1524: {
1525: struct m_tag *mtag;
1526:
1527: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1528: return mtag;
1529: }
1530:
1531: void
1.107 christos 1532: ip6_delaux(struct mbuf *m)
1.81 rpaulo 1533: {
1534: struct m_tag *mtag;
1535:
1536: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
1537: if (mtag)
1538: m_tag_delete(m, mtag);
1539: }
1540:
1.98 liamjfoy 1541: #ifdef GATEWAY
1.149.4.2 skrll 1542: /*
1.98 liamjfoy 1543: * sysctl helper routine for net.inet.ip6.maxflows. Since
1544: * we could reduce this value, call ip6flow_reap();
1545: */
1546: static int
1.101 liamjfoy 1547: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
1.149.4.2 skrll 1548: {
1.121 simonb 1549: int error;
1.149.4.2 skrll 1550:
1.121 simonb 1551: error = sysctl_lookup(SYSCTLFN_CALL(rnode));
1552: if (error || newp == NULL)
1553: return (error);
1.149.4.2 skrll 1554:
1.121 simonb 1555: mutex_enter(softnet_lock);
1.122 matt 1556: KERNEL_LOCK(1, NULL);
1.120 matt 1557:
1.121 simonb 1558: ip6flow_reap(0);
1.120 matt 1559:
1560: KERNEL_UNLOCK_ONE(NULL);
1.121 simonb 1561: mutex_exit(softnet_lock);
1.149.4.2 skrll 1562:
1.121 simonb 1563: return (0);
1.98 liamjfoy 1564: }
1.99 liamjfoy 1565:
1566: static int
1567: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
1.149.4.2 skrll 1568: {
1.99 liamjfoy 1569: int error, tmp;
1570: struct sysctlnode node;
1571:
1572: node = *rnode;
1573: tmp = ip6_hashsize;
1574: node.sysctl_data = &tmp;
1575: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1576: if (error || newp == NULL)
1577: return (error);
1578:
1579: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
1580: /*
1581: * Can only fail due to malloc()
1582: */
1.120 matt 1583: mutex_enter(softnet_lock);
1.122 matt 1584: KERNEL_LOCK(1, NULL);
1.120 matt 1585:
1586: error = ip6flow_invalidate_all(tmp);
1587:
1588: KERNEL_UNLOCK_ONE(NULL);
1589: mutex_exit(softnet_lock);
1.99 liamjfoy 1590: } else {
1591: /*
1592: * EINVAL if not a power of 2
1.121 simonb 1593: */
1.120 matt 1594: error = EINVAL;
1.149.4.2 skrll 1595: }
1.99 liamjfoy 1596:
1.120 matt 1597: return error;
1.99 liamjfoy 1598: }
1.98 liamjfoy 1599: #endif /* GATEWAY */
1600:
1.2 itojun 1601: /*
1602: * System control for IP6
1603: */
1604:
1.120 matt 1605: const u_char inet6ctlerrmap[PRC_NCMDS] = {
1.2 itojun 1606: 0, 0, 0, 0,
1607: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1608: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1609: EMSGSIZE, EHOSTUNREACH, 0, 0,
1610: 0, 0, 0, 0,
1611: ENOPROTOOPT
1612: };
1613:
1.149.4.3! skrll 1614: extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS);
! 1615:
1.116 thorpej 1616: static int
1617: sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS)
1618: {
1619:
1.119 thorpej 1620: return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS));
1.116 thorpej 1621: }
1622:
1.128 pooka 1623: static void
1624: sysctl_net_inet6_ip6_setup(struct sysctllog **clog)
1.2 itojun 1625: {
1.85 rpaulo 1626: #ifdef RFC2292
1627: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
1628: #else
1629: #define IS2292(x, y) (y)
1630: #endif
1.26 itojun 1631:
1.73 atatat 1632: sysctl_createv(clog, 0, NULL, NULL,
1633: CTLFLAG_PERMANENT,
1.74 atatat 1634: CTLTYPE_NODE, "inet6",
1635: SYSCTL_DESCR("PF_INET6 related settings"),
1.70 atatat 1636: NULL, 0, NULL, 0,
1637: CTL_NET, PF_INET6, CTL_EOL);
1.73 atatat 1638: sysctl_createv(clog, 0, NULL, NULL,
1639: CTLFLAG_PERMANENT,
1.74 atatat 1640: CTLTYPE_NODE, "ip6",
1641: SYSCTL_DESCR("IPv6 related settings"),
1.70 atatat 1642: NULL, 0, NULL, 0,
1643: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1644:
1.73 atatat 1645: sysctl_createv(clog, 0, NULL, NULL,
1646: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1647: CTLTYPE_INT, "forwarding",
1648: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70 atatat 1649: NULL, 0, &ip6_forwarding, 0,
1650: CTL_NET, PF_INET6, IPPROTO_IPV6,
1651: IPV6CTL_FORWARDING, CTL_EOL);
1.73 atatat 1652: sysctl_createv(clog, 0, NULL, NULL,
1653: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1654: CTLTYPE_INT, "redirect",
1655: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70 atatat 1656: NULL, 0, &ip6_sendredirects, 0,
1657: CTL_NET, PF_INET6, IPPROTO_IPV6,
1658: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73 atatat 1659: sysctl_createv(clog, 0, NULL, NULL,
1660: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1661: CTLTYPE_INT, "hlim",
1662: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70 atatat 1663: NULL, 0, &ip6_defhlim, 0,
1664: CTL_NET, PF_INET6, IPPROTO_IPV6,
1665: IPV6CTL_DEFHLIM, CTL_EOL);
1666: #ifdef notyet
1.73 atatat 1667: sysctl_createv(clog, 0, NULL, NULL,
1668: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1669: CTLTYPE_INT, "mtu", NULL,
1670: NULL, 0, &, 0,
1671: CTL_NET, PF_INET6, IPPROTO_IPV6,
1672: IPV6CTL_DEFMTU, CTL_EOL);
1673: #endif
1674: #ifdef __no_idea__
1.73 atatat 1675: sysctl_createv(clog, 0, NULL, NULL,
1676: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1677: CTLTYPE_INT, "forwsrcrt", NULL,
1678: NULL, 0, &?, 0,
1679: CTL_NET, PF_INET6, IPPROTO_IPV6,
1680: IPV6CTL_FORWSRCRT, CTL_EOL);
1.73 atatat 1681: sysctl_createv(clog, 0, NULL, NULL,
1682: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1683: CTLTYPE_STRUCT, "mrtstats", NULL,
1684: NULL, 0, &?, sizeof(?),
1685: CTL_NET, PF_INET6, IPPROTO_IPV6,
1686: IPV6CTL_MRTSTATS, CTL_EOL);
1.73 atatat 1687: sysctl_createv(clog, 0, NULL, NULL,
1688: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1689: CTLTYPE_?, "mrtproto", NULL,
1690: NULL, 0, &?, sizeof(?),
1691: CTL_NET, PF_INET6, IPPROTO_IPV6,
1692: IPV6CTL_MRTPROTO, CTL_EOL);
1693: #endif
1.73 atatat 1694: sysctl_createv(clog, 0, NULL, NULL,
1695: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1696: CTLTYPE_INT, "maxfragpackets",
1697: SYSCTL_DESCR("Maximum number of fragments to buffer "
1698: "for reassembly"),
1.70 atatat 1699: NULL, 0, &ip6_maxfragpackets, 0,
1700: CTL_NET, PF_INET6, IPPROTO_IPV6,
1701: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1702: #ifdef __no_idea__
1.73 atatat 1703: sysctl_createv(clog, 0, NULL, NULL,
1704: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1705: CTLTYPE_INT, "sourcecheck", NULL,
1706: NULL, 0, &?, 0,
1707: CTL_NET, PF_INET6, IPPROTO_IPV6,
1708: IPV6CTL_SOURCECHECK, CTL_EOL);
1.73 atatat 1709: sysctl_createv(clog, 0, NULL, NULL,
1710: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1711: CTLTYPE_INT, "sourcecheck_logint", NULL,
1712: NULL, 0, &?, 0,
1713: CTL_NET, PF_INET6, IPPROTO_IPV6,
1714: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1715: #endif
1.73 atatat 1716: sysctl_createv(clog, 0, NULL, NULL,
1717: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1718: CTLTYPE_INT, "accept_rtadv",
1719: SYSCTL_DESCR("Accept router advertisements"),
1.70 atatat 1720: NULL, 0, &ip6_accept_rtadv, 0,
1721: CTL_NET, PF_INET6, IPPROTO_IPV6,
1722: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73 atatat 1723: sysctl_createv(clog, 0, NULL, NULL,
1724: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.131 spz 1725: CTLTYPE_INT, "rtadv_maxroutes",
1726: SYSCTL_DESCR("Maximum number of routes accepted via router advertisements"),
1727: NULL, 0, &ip6_rtadv_maxroutes, 0,
1728: CTL_NET, PF_INET6, IPPROTO_IPV6,
1729: IPV6CTL_RTADV_MAXROUTES, CTL_EOL);
1730: sysctl_createv(clog, 0, NULL, NULL,
1731: CTLFLAG_PERMANENT,
1732: CTLTYPE_INT, "rtadv_numroutes",
1733: SYSCTL_DESCR("Current number of routes accepted via router advertisements"),
1734: NULL, 0, &nd6_numroutes, 0,
1735: CTL_NET, PF_INET6, IPPROTO_IPV6,
1736: IPV6CTL_RTADV_NUMROUTES, CTL_EOL);
1737: sysctl_createv(clog, 0, NULL, NULL,
1738: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1739: CTLTYPE_INT, "keepfaith",
1740: SYSCTL_DESCR("Activate faith interface"),
1.70 atatat 1741: NULL, 0, &ip6_keepfaith, 0,
1742: CTL_NET, PF_INET6, IPPROTO_IPV6,
1743: IPV6CTL_KEEPFAITH, CTL_EOL);
1.73 atatat 1744: sysctl_createv(clog, 0, NULL, NULL,
1745: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1746: CTLTYPE_INT, "log_interval",
1747: SYSCTL_DESCR("Minumum interval between logging "
1748: "unroutable packets"),
1.70 atatat 1749: NULL, 0, &ip6_log_interval, 0,
1750: CTL_NET, PF_INET6, IPPROTO_IPV6,
1751: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73 atatat 1752: sysctl_createv(clog, 0, NULL, NULL,
1753: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1754: CTLTYPE_INT, "hdrnestlimit",
1755: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70 atatat 1756: NULL, 0, &ip6_hdrnestlimit, 0,
1757: CTL_NET, PF_INET6, IPPROTO_IPV6,
1758: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73 atatat 1759: sysctl_createv(clog, 0, NULL, NULL,
1760: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1761: CTLTYPE_INT, "dad_count",
1762: SYSCTL_DESCR("Number of Duplicate Address Detection "
1763: "probes to send"),
1.70 atatat 1764: NULL, 0, &ip6_dad_count, 0,
1765: CTL_NET, PF_INET6, IPPROTO_IPV6,
1766: IPV6CTL_DAD_COUNT, CTL_EOL);
1.73 atatat 1767: sysctl_createv(clog, 0, NULL, NULL,
1768: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1769: CTLTYPE_INT, "auto_flowlabel",
1770: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70 atatat 1771: NULL, 0, &ip6_auto_flowlabel, 0,
1772: CTL_NET, PF_INET6, IPPROTO_IPV6,
1773: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73 atatat 1774: sysctl_createv(clog, 0, NULL, NULL,
1775: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1776: CTLTYPE_INT, "defmcasthlim",
1777: SYSCTL_DESCR("Default multicast hop limit"),
1.70 atatat 1778: NULL, 0, &ip6_defmcasthlim, 0,
1779: CTL_NET, PF_INET6, IPPROTO_IPV6,
1780: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1781: #if NGIF > 0
1.73 atatat 1782: sysctl_createv(clog, 0, NULL, NULL,
1783: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1784: CTLTYPE_INT, "gifhlim",
1785: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70 atatat 1786: NULL, 0, &ip6_gif_hlim, 0,
1787: CTL_NET, PF_INET6, IPPROTO_IPV6,
1788: IPV6CTL_GIF_HLIM, CTL_EOL);
1789: #endif /* NGIF */
1.73 atatat 1790: sysctl_createv(clog, 0, NULL, NULL,
1791: CTLFLAG_PERMANENT,
1.74 atatat 1792: CTLTYPE_STRING, "kame_version",
1793: SYSCTL_DESCR("KAME Version"),
1.78 christos 1794: NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70 atatat 1795: CTL_NET, PF_INET6, IPPROTO_IPV6,
1796: IPV6CTL_KAME_VERSION, CTL_EOL);
1.73 atatat 1797: sysctl_createv(clog, 0, NULL, NULL,
1798: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1799: CTLTYPE_INT, "use_deprecated",
1800: SYSCTL_DESCR("Allow use of deprecated addresses as "
1801: "source addresses"),
1.70 atatat 1802: NULL, 0, &ip6_use_deprecated, 0,
1803: CTL_NET, PF_INET6, IPPROTO_IPV6,
1804: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73 atatat 1805: sysctl_createv(clog, 0, NULL, NULL,
1806: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70 atatat 1807: CTLTYPE_INT, "rr_prune", NULL,
1808: NULL, 0, &ip6_rr_prune, 0,
1809: CTL_NET, PF_INET6, IPPROTO_IPV6,
1810: IPV6CTL_RR_PRUNE, CTL_EOL);
1.73 atatat 1811: sysctl_createv(clog, 0, NULL, NULL,
1812: CTLFLAG_PERMANENT
1.70 atatat 1813: #ifndef INET6_BINDV6ONLY
1.73 atatat 1814: |CTLFLAG_READWRITE,
1.70 atatat 1815: #endif
1.74 atatat 1816: CTLTYPE_INT, "v6only",
1817: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1818: "to PF_INET sockets"),
1.70 atatat 1819: NULL, 0, &ip6_v6only, 0,
1820: CTL_NET, PF_INET6, IPPROTO_IPV6,
1821: IPV6CTL_V6ONLY, CTL_EOL);
1.73 atatat 1822: sysctl_createv(clog, 0, NULL, NULL,
1823: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1824: CTLTYPE_INT, "anonportmin",
1825: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70 atatat 1826: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1827: CTL_NET, PF_INET6, IPPROTO_IPV6,
1828: IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73 atatat 1829: sysctl_createv(clog, 0, NULL, NULL,
1830: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1831: CTLTYPE_INT, "anonportmax",
1832: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70 atatat 1833: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1834: CTL_NET, PF_INET6, IPPROTO_IPV6,
1835: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1836: #ifndef IPNOPRIVPORTS
1.73 atatat 1837: sysctl_createv(clog, 0, NULL, NULL,
1838: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1839: CTLTYPE_INT, "lowportmin",
1840: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1841: "to assign"),
1.70 atatat 1842: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1843: CTL_NET, PF_INET6, IPPROTO_IPV6,
1844: IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73 atatat 1845: sysctl_createv(clog, 0, NULL, NULL,
1846: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1847: CTLTYPE_INT, "lowportmax",
1848: SYSCTL_DESCR("Highest privileged ephemeral port number "
1849: "to assign"),
1.70 atatat 1850: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1851: CTL_NET, PF_INET6, IPPROTO_IPV6,
1852: IPV6CTL_LOWPORTMAX, CTL_EOL);
1853: #endif /* IPNOPRIVPORTS */
1.73 atatat 1854: sysctl_createv(clog, 0, NULL, NULL,
1855: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.149.4.3! skrll 1856: CTLTYPE_INT, "auto_linklocal",
! 1857: SYSCTL_DESCR("Default value of per-interface flag for "
! 1858: "adding an IPv6 link-local address to "
! 1859: "interfaces when attached"),
! 1860: NULL, 0, &ip6_auto_linklocal, 0,
! 1861: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1862: IPV6CTL_AUTO_LINKLOCAL, CTL_EOL);
! 1863: sysctl_createv(clog, 0, NULL, NULL,
! 1864: CTLFLAG_PERMANENT|CTLFLAG_READONLY,
! 1865: CTLTYPE_STRUCT, "addctlpolicy",
! 1866: SYSCTL_DESCR("Return the current address control"
! 1867: " policy"),
! 1868: sysctl_net_inet6_addrctlpolicy, 0, NULL, 0,
! 1869: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1870: IPV6CTL_ADDRCTLPOLICY, CTL_EOL);
! 1871: sysctl_createv(clog, 0, NULL, NULL,
! 1872: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1873: CTLTYPE_INT, "use_tempaddr",
1874: SYSCTL_DESCR("Use temporary address"),
1875: NULL, 0, &ip6_use_tempaddr, 0,
1876: CTL_NET, PF_INET6, IPPROTO_IPV6,
1877: CTL_CREATE, CTL_EOL);
1878: sysctl_createv(clog, 0, NULL, NULL,
1879: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.149.4.1 skrll 1880: CTLTYPE_INT, "prefer_tempaddr",
1881: SYSCTL_DESCR("Prefer temporary address as source "
1882: "address"),
1883: NULL, 0, &ip6_prefer_tempaddr, 0,
1884: CTL_NET, PF_INET6, IPPROTO_IPV6,
1885: CTL_CREATE, CTL_EOL);
1886: sysctl_createv(clog, 0, NULL, NULL,
1887: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83 rpaulo 1888: CTLTYPE_INT, "temppltime",
1889: SYSCTL_DESCR("preferred lifetime of a temporary address"),
1890: NULL, 0, &ip6_temp_preferred_lifetime, 0,
1891: CTL_NET, PF_INET6, IPPROTO_IPV6,
1892: CTL_CREATE, CTL_EOL);
1893: sysctl_createv(clog, 0, NULL, NULL,
1894: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1895: CTLTYPE_INT, "tempvltime",
1896: SYSCTL_DESCR("valid lifetime of a temporary address"),
1897: NULL, 0, &ip6_temp_valid_lifetime, 0,
1898: CTL_NET, PF_INET6, IPPROTO_IPV6,
1899: CTL_CREATE, CTL_EOL);
1900: sysctl_createv(clog, 0, NULL, NULL,
1901: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74 atatat 1902: CTLTYPE_INT, "maxfrags",
1903: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70 atatat 1904: NULL, 0, &ip6_maxfrags, 0,
1905: CTL_NET, PF_INET6, IPPROTO_IPV6,
1906: IPV6CTL_MAXFRAGS, CTL_EOL);
1.79 rpaulo 1907: sysctl_createv(clog, 0, NULL, NULL,
1908: CTLFLAG_PERMANENT,
1909: CTLTYPE_STRUCT, "stats",
1910: SYSCTL_DESCR("IPv6 statistics"),
1.116 thorpej 1911: sysctl_net_inet6_ip6_stats, 0, NULL, 0,
1.79 rpaulo 1912: CTL_NET, PF_INET6, IPPROTO_IPV6,
1913: IPV6CTL_STATS, CTL_EOL);
1.81 rpaulo 1914: sysctl_createv(clog, 0, NULL, NULL,
1915: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1916: CTLTYPE_INT, "use_defaultzone",
1917: SYSCTL_DESCR("Whether to use the default scope zones"),
1918: NULL, 0, &ip6_use_defzone, 0,
1919: CTL_NET, PF_INET6, IPPROTO_IPV6,
1920: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83 rpaulo 1921: sysctl_createv(clog, 0, NULL, NULL,
1922: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1923: CTLTYPE_INT, "mcast_pmtu",
1924: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
1925: NULL, 0, &ip6_mcast_pmtu, 0,
1926: CTL_NET, PF_INET6, IPPROTO_IPV6,
1927: CTL_CREATE, CTL_EOL);
1.149.4.2 skrll 1928: #ifdef GATEWAY
1.98 liamjfoy 1929: sysctl_createv(clog, 0, NULL, NULL,
1930: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1931: CTLTYPE_INT, "maxflows",
1932: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
1.101 liamjfoy 1933: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
1.98 liamjfoy 1934: CTL_NET, PF_INET6, IPPROTO_IPV6,
1935: CTL_CREATE, CTL_EOL);
1.99 liamjfoy 1936: sysctl_createv(clog, 0, NULL, NULL,
1937: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1938: CTLTYPE_INT, "hashsize",
1939: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
1940: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
1941: CTL_NET, PF_INET6, IPPROTO_IPV6,
1942: CTL_CREATE, CTL_EOL);
1.98 liamjfoy 1943: #endif
1.138 christos 1944: /* anonportalgo RFC6056 subtree */
1.140 christos 1945: const struct sysctlnode *portalgo_node;
1946: sysctl_createv(clog, 0, NULL, &portalgo_node,
1.138 christos 1947: CTLFLAG_PERMANENT,
1948: CTLTYPE_NODE, "anonportalgo",
1949: SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"),
1950: NULL, 0, NULL, 0,
1951: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL);
1.140 christos 1952: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1953: CTLFLAG_PERMANENT,
1954: CTLTYPE_STRING, "available",
1955: SYSCTL_DESCR("available algorithms"),
1.140 christos 1956: sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1957: CTL_CREATE, CTL_EOL);
1.140 christos 1958: sysctl_createv(clog, 0, &portalgo_node, NULL,
1.138 christos 1959: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1960: CTLTYPE_STRING, "selected",
1961: SYSCTL_DESCR("selected algorithm"),
1.140 christos 1962: sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN,
1.138 christos 1963: CTL_CREATE, CTL_EOL);
1.141 christos 1964: sysctl_createv(clog, 0, &portalgo_node, NULL,
1965: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1966: CTLTYPE_STRUCT, "reserve",
1967: SYSCTL_DESCR("bitmap of reserved ports"),
1968: sysctl_portalgo_reserve6, 0, NULL, 0,
1969: CTL_CREATE, CTL_EOL);
1.139 christos 1970: sysctl_createv(clog, 0, NULL, NULL,
1971: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1972: CTLTYPE_INT, "neighborgcthresh",
1973: SYSCTL_DESCR("Maximum number of entries in neighbor"
1974: " cache"),
1975: NULL, 1, &ip6_neighborgcthresh, 0,
1976: CTL_NET, PF_INET6, IPPROTO_IPV6,
1977: CTL_CREATE, CTL_EOL);
1978: sysctl_createv(clog, 0, NULL, NULL,
1979: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1980: CTLTYPE_INT, "maxifprefixes",
1981: SYSCTL_DESCR("Maximum number of prefixes created by"
1982: " route advertisement per interface"),
1983: NULL, 1, &ip6_maxifprefixes, 0,
1984: CTL_NET, PF_INET6, IPPROTO_IPV6,
1985: CTL_CREATE, CTL_EOL);
1986: sysctl_createv(clog, 0, NULL, NULL,
1987: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1988: CTLTYPE_INT, "maxifdefrouters",
1989: SYSCTL_DESCR("Maximum number of default routers created"
1990: " by route advertisement per interface"),
1991: NULL, 1, &ip6_maxifdefrouters, 0,
1992: CTL_NET, PF_INET6, IPPROTO_IPV6,
1993: CTL_CREATE, CTL_EOL);
1994: sysctl_createv(clog, 0, NULL, NULL,
1995: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1996: CTLTYPE_INT, "maxdynroutes",
1997: SYSCTL_DESCR("Maximum number of routes created via"
1998: " redirect"),
1999: NULL, 1, &ip6_maxdynroutes, 0,
2000: CTL_NET, PF_INET6, IPPROTO_IPV6,
2001: CTL_CREATE, CTL_EOL);
1.2 itojun 2002: }
1.116 thorpej 2003:
2004: void
2005: ip6_statinc(u_int stat)
2006: {
2007:
2008: KASSERT(stat < IP6_NSTATS);
2009: IP6_STATINC(stat);
2010: }
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