Annotation of src/sys/netinet6/ip6_input.c, Revision 1.64.2.4
1.64.2.4! skrll 1: /* $NetBSD: ip6_input.c,v 1.64.2.3 2004/09/21 13:37:34 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.
1.64.2.1 skrll 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>
1.64.2.4! skrll 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.64.2.3 2004/09/21 13:37:34 skrll Exp $");
1.2 itojun 66:
67: #include "opt_inet.h"
1.4 thorpej 68: #include "opt_ipsec.h"
1.15 darrenr 69: #include "opt_pfil_hooks.h"
1.2 itojun 70:
71: #include <sys/param.h>
72: #include <sys/systm.h>
73: #include <sys/malloc.h>
74: #include <sys/mbuf.h>
75: #include <sys/domain.h>
76: #include <sys/protosw.h>
77: #include <sys/socket.h>
78: #include <sys/socketvar.h>
79: #include <sys/errno.h>
80: #include <sys/time.h>
81: #include <sys/kernel.h>
82: #include <sys/syslog.h>
83: #include <sys/proc.h>
1.46 simonb 84: #include <sys/sysctl.h>
1.2 itojun 85:
86: #include <net/if.h>
87: #include <net/if_types.h>
88: #include <net/if_dl.h>
89: #include <net/route.h>
90: #include <net/netisr.h>
1.15 darrenr 91: #ifdef PFIL_HOOKS
92: #include <net/pfil.h>
93: #endif
1.2 itojun 94:
95: #include <netinet/in.h>
1.9 itojun 96: #include <netinet/in_systm.h>
97: #ifdef INET
98: #include <netinet/ip.h>
99: #include <netinet/ip_icmp.h>
1.45 itojun 100: #endif /* INET */
1.14 itojun 101: #include <netinet/ip6.h>
1.2 itojun 102: #include <netinet6/in6_var.h>
1.11 itojun 103: #include <netinet6/ip6_var.h>
1.2 itojun 104: #include <netinet6/in6_pcb.h>
1.14 itojun 105: #include <netinet/icmp6.h>
1.2 itojun 106: #include <netinet6/in6_ifattach.h>
107: #include <netinet6/nd6.h>
108:
1.37 itojun 109: #ifdef IPSEC
110: #include <netinet6/ipsec.h>
111: #endif
112:
1.2 itojun 113: #include <netinet6/ip6protosw.h>
114:
115: /* we need it for NLOOP. */
116: #include "loop.h"
117: #include "faith.h"
118: #include "gif.h"
1.50 itojun 119:
120: #if NGIF > 0
121: #include <netinet6/in6_gif.h>
122: #endif
1.2 itojun 123:
1.9 itojun 124: #include <net/net_osdep.h>
125:
1.2 itojun 126: extern struct domain inet6domain;
127:
128: u_char ip6_protox[IPPROTO_MAX];
129: static int ip6qmaxlen = IFQ_MAXLEN;
130: struct in6_ifaddr *in6_ifaddr;
131: struct ifqueue ip6intrq;
132:
133: extern struct ifnet loif[NLOOP];
134: int ip6_forward_srcrt; /* XXX */
135: int ip6_sourcecheck; /* XXX */
136: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 137:
1.29 thorpej 138: #ifdef PFIL_HOOKS
139: struct pfil_head inet6_pfil_hook;
140: #endif
141:
1.2 itojun 142: struct ip6stat ip6stat;
143:
144: static void ip6_init2 __P((void *));
145:
1.5 itojun 146: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
1.62 itojun 147: static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));
1.2 itojun 148:
149: /*
150: * IP6 initialization: fill in IP6 protocol switch table.
151: * All protocols not implemented in kernel go to raw IP6 protocol handler.
152: */
153: void
154: ip6_init()
155: {
1.35 itojun 156: struct ip6protosw *pr;
157: int i;
1.2 itojun 158:
159: pr = (struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
160: if (pr == 0)
161: panic("ip6_init");
162: for (i = 0; i < IPPROTO_MAX; i++)
163: ip6_protox[i] = pr - inet6sw;
164: for (pr = (struct ip6protosw *)inet6domain.dom_protosw;
165: pr < (struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
166: if (pr->pr_domain->dom_family == PF_INET6 &&
167: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
168: ip6_protox[pr->pr_protocol] = pr - inet6sw;
169: ip6intrq.ifq_maxlen = ip6qmaxlen;
170: nd6_init();
171: frag6_init();
172:
173: ip6_init2((void *)0);
1.29 thorpej 174:
175: #ifdef PFIL_HOOKS
176: /* Register our Packet Filter hook. */
1.33 thorpej 177: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
178: inet6_pfil_hook.ph_af = AF_INET6;
1.29 thorpej 179: i = pfil_head_register(&inet6_pfil_hook);
180: if (i != 0)
181: printf("ip6_init: WARNING: unable to register pfil hook, "
182: "error %d\n", i);
183: #endif /* PFIL_HOOKS */
1.2 itojun 184: }
185:
186: static void
187: ip6_init2(dummy)
188: void *dummy;
189: {
190:
191: /* nd6_timer_init */
1.19 thorpej 192: callout_init(&nd6_timer_ch);
193: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.2 itojun 194: }
195:
196: /*
197: * IP6 input interrupt handling. Just pass the packet to ip6_input.
198: */
199: void
200: ip6intr()
201: {
202: int s;
203: struct mbuf *m;
204:
205: for (;;) {
1.41 thorpej 206: s = splnet();
1.2 itojun 207: IF_DEQUEUE(&ip6intrq, m);
208: splx(s);
209: if (m == 0)
210: return;
211: ip6_input(m);
212: }
213: }
214:
215: extern struct route_in6 ip6_forward_rt;
216:
217: void
218: ip6_input(m)
219: struct mbuf *m;
220: {
1.9 itojun 221: struct ip6_hdr *ip6;
1.2 itojun 222: int off = sizeof(struct ip6_hdr), nest;
223: u_int32_t plen;
1.5 itojun 224: u_int32_t rtalert = ~0;
1.2 itojun 225: int nxt, ours = 0;
1.9 itojun 226: struct ifnet *deliverifp = NULL;
1.64 itojun 227: int srcrt = 0;
1.2 itojun 228:
229: #ifdef IPSEC
230: /*
231: * should the inner packet be considered authentic?
232: * see comment in ah4_input().
233: */
1.49 itojun 234: m->m_flags &= ~M_AUTHIPHDR;
235: m->m_flags &= ~M_AUTHIPDGM;
1.2 itojun 236: #endif
1.9 itojun 237:
1.2 itojun 238: /*
1.44 itojun 239: * mbuf statistics
1.2 itojun 240: */
241: if (m->m_flags & M_EXT) {
242: if (m->m_next)
243: ip6stat.ip6s_mext2m++;
244: else
245: ip6stat.ip6s_mext1++;
246: } else {
1.40 itojun 247: #define M2MMAX (sizeof(ip6stat.ip6s_m2m)/sizeof(ip6stat.ip6s_m2m[0]))
1.2 itojun 248: if (m->m_next) {
1.9 itojun 249: if (m->m_flags & M_LOOP) {
1.44 itojun 250: ip6stat.ip6s_m2m[loif[0].if_index]++; /* XXX */
1.40 itojun 251: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2 itojun 252: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
253: else
254: ip6stat.ip6s_m2m[0]++;
255: } else
256: ip6stat.ip6s_m1++;
1.40 itojun 257: #undef M2MMAX
1.2 itojun 258: }
259:
1.9 itojun 260: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
261: ip6stat.ip6s_total++;
262:
1.57 thorpej 263: /*
264: * If the IPv6 header is not aligned, slurp it up into a new
265: * mbuf with space for link headers, in the event we forward
266: * it. OTherwise, if it is aligned, make sure the entire base
267: * IPv6 header is in the first mbuf of the chain.
268: */
269: if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
270: struct ifnet *inifp = m->m_pkthdr.rcvif;
271: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
272: (max_linkhdr + 3) & ~3)) == NULL) {
273: /* XXXJRT new stat, please */
274: ip6stat.ip6s_toosmall++;
275: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
276: return;
277: }
278: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
279: struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55 itojun 280: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9 itojun 281: ip6stat.ip6s_toosmall++;
282: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
283: return;
284: }
1.2 itojun 285: }
286:
287: ip6 = mtod(m, struct ip6_hdr *);
288:
289: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
290: ip6stat.ip6s_badvers++;
1.9 itojun 291: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 292: goto bad;
293: }
1.15 darrenr 294:
295: #ifdef PFIL_HOOKS
296: /*
297: * Run through list of hooks for input packets. If there are any
298: * filters which require that additional packets in the flow are
299: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
300: * Note that filters must _never_ set this flag, as another filter
301: * in the list may have previously cleared it.
302: */
1.39 itojun 303: /*
304: * let ipfilter look at packet on the wire,
305: * not the decapsulated packet.
306: */
307: #ifdef IPSEC
1.42 itojun 308: if (!ipsec_getnhist(m))
1.39 itojun 309: #else
310: if (1)
311: #endif
312: {
1.64 itojun 313: struct in6_addr odst;
314:
315: odst = ip6->ip6_dst;
1.39 itojun 316: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
317: PFIL_IN) != 0)
318: return;
319: if (m == NULL)
320: return;
321: ip6 = mtod(m, struct ip6_hdr *);
1.64 itojun 322: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39 itojun 323: }
1.15 darrenr 324: #endif /* PFIL_HOOKS */
325:
1.2 itojun 326: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
327:
1.30 thorpej 328: #ifdef ALTQ
329: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
330: /* packet is dropped by traffic conditioner */
331: return;
1.9 itojun 332: }
333: #endif
334:
1.2 itojun 335: /*
1.44 itojun 336: * Check against address spoofing/corruption.
1.2 itojun 337: */
338: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
339: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55 itojun 340: /*
341: * XXX: "badscope" is not very suitable for a multicast source.
342: */
1.2 itojun 343: ip6stat.ip6s_badscope++;
1.9 itojun 344: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 345: goto bad;
346: }
1.13 itojun 347: /*
1.44 itojun 348: * The following check is not documented in specs. A malicious
349: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
350: * and bypass security checks (act as if it was from 127.0.0.1 by using
351: * IPv6 src ::ffff:127.0.0.1). Be cautious.
1.35 itojun 352: *
1.44 itojun 353: * This check chokes if we are in an SIIT cloud. As none of BSDs
354: * support IPv4-less kernel compilation, we cannot support SIIT
355: * environment at all. So, it makes more sense for us to reject any
356: * malicious packets for non-SIIT environment, than try to do a
1.52 wiz 357: * partial support for SIIT environment.
1.13 itojun 358: */
359: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
360: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
361: ip6stat.ip6s_badscope++;
362: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
363: goto bad;
364: }
1.17 itojun 365: #if 0
1.13 itojun 366: /*
1.17 itojun 367: * Reject packets with IPv4 compatible addresses (auto tunnel).
368: *
369: * The code forbids auto tunnel relay case in RFC1933 (the check is
370: * stronger than RFC1933). We may want to re-enable it if mech-xx
371: * is revised to forbid relaying case.
1.13 itojun 372: */
373: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
374: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
375: ip6stat.ip6s_badscope++;
376: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
377: goto bad;
378: }
379: #endif
1.35 itojun 380:
1.2 itojun 381: if (IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src) ||
382: IN6_IS_ADDR_LOOPBACK(&ip6->ip6_dst)) {
383: if (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) {
384: ours = 1;
1.9 itojun 385: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 386: goto hbhcheck;
387: } else {
388: ip6stat.ip6s_badscope++;
1.9 itojun 389: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 390: goto bad;
391: }
392: }
393:
1.38 itojun 394: /* drop packets if interface ID portion is already filled */
395: if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) {
396: if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src) &&
397: ip6->ip6_src.s6_addr16[1]) {
398: ip6stat.ip6s_badscope++;
399: goto bad;
400: }
401: if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst) &&
402: ip6->ip6_dst.s6_addr16[1]) {
403: ip6stat.ip6s_badscope++;
404: goto bad;
405: }
406: }
1.2 itojun 407:
1.40 itojun 408: if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src))
409: ip6->ip6_src.s6_addr16[1]
410: = htons(m->m_pkthdr.rcvif->if_index);
411: if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst))
412: ip6->ip6_dst.s6_addr16[1]
413: = htons(m->m_pkthdr.rcvif->if_index);
414:
415: /*
416: * We use rt->rt_ifp to determine if the address is ours or not.
417: * If rt_ifp is lo0, the address is ours.
418: * The problem here is, rt->rt_ifp for fe80::%lo0/64 is set to lo0,
419: * so any address under fe80::%lo0/64 will be mistakenly considered
420: * local. The special case is supplied to handle the case properly
421: * by actually looking at interface addresses
422: * (using in6ifa_ifpwithaddr).
423: */
424: if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) != 0 &&
425: IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) {
426: if (!in6ifa_ifpwithaddr(m->m_pkthdr.rcvif, &ip6->ip6_dst)) {
427: icmp6_error(m, ICMP6_DST_UNREACH,
428: ICMP6_DST_UNREACH_ADDR, 0);
429: /* m is already freed */
430: return;
1.21 itojun 431: }
1.40 itojun 432:
433: ours = 1;
434: deliverifp = m->m_pkthdr.rcvif;
435: goto hbhcheck;
1.9 itojun 436: }
437:
1.2 itojun 438: /*
439: * Multicast check
440: */
441: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
442: struct in6_multi *in6m = 0;
1.9 itojun 443:
444: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 445: /*
446: * See if we belong to the destination multicast group on the
447: * arrival interface.
448: */
449: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
450: if (in6m)
451: ours = 1;
452: else if (!ip6_mrouter) {
453: ip6stat.ip6s_notmember++;
454: ip6stat.ip6s_cantforward++;
1.9 itojun 455: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 456: goto bad;
457: }
1.9 itojun 458: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 459: goto hbhcheck;
460: }
461:
462: /*
463: * Unicast check
464: */
1.22 itojun 465: if (ip6_forward_rt.ro_rt != NULL &&
1.55 itojun 466: (ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 &&
1.22 itojun 467: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.64.2.1 skrll 468: &((struct sockaddr_in6 *)(&ip6_forward_rt.ro_dst))->sin6_addr))
1.25 itojun 469: ip6stat.ip6s_forward_cachehit++;
1.22 itojun 470: else {
1.35 itojun 471: struct sockaddr_in6 *dst6;
472:
1.2 itojun 473: if (ip6_forward_rt.ro_rt) {
1.22 itojun 474: /* route is down or destination is different */
1.25 itojun 475: ip6stat.ip6s_forward_cachemiss++;
1.2 itojun 476: RTFREE(ip6_forward_rt.ro_rt);
477: ip6_forward_rt.ro_rt = 0;
478: }
1.22 itojun 479:
1.2 itojun 480: bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6));
1.35 itojun 481: dst6 = (struct sockaddr_in6 *)&ip6_forward_rt.ro_dst;
482: dst6->sin6_len = sizeof(struct sockaddr_in6);
483: dst6->sin6_family = AF_INET6;
484: dst6->sin6_addr = ip6->ip6_dst;
1.2 itojun 485:
1.9 itojun 486: rtalloc((struct route *)&ip6_forward_rt);
1.2 itojun 487: }
488:
489: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
490:
491: /*
492: * Accept the packet if the forwarding interface to the destination
493: * according to the routing table is the loopback interface,
494: * unless the associated route has a gateway.
495: * Note that this approach causes to accept a packet if there is a
496: * route to the loopback interface for the destination of the packet.
497: * But we think it's even useful in some situations, e.g. when using
498: * a special daemon which wants to intercept the packet.
499: */
500: if (ip6_forward_rt.ro_rt &&
501: (ip6_forward_rt.ro_rt->rt_flags &
502: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55 itojun 503: !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2 itojun 504: #if 0
505: /*
506: * The check below is redundant since the comparison of
507: * the destination and the key of the rtentry has
508: * already done through looking up the routing table.
509: */
510: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55 itojun 511: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2 itojun 512: #endif
1.9 itojun 513: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 514: struct in6_ifaddr *ia6 =
515: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
516: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
517: m->m_flags |= M_ANYCAST6;
1.24 itojun 518: /*
519: * packets to a tentative, duplicated, or somehow invalid
520: * address must not be accepted.
521: */
1.2 itojun 522: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24 itojun 523: /* this address is ready */
1.2 itojun 524: ours = 1;
1.9 itojun 525: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 526: goto hbhcheck;
527: } else {
1.24 itojun 528: /* address is not ready, so discard the packet. */
1.34 itojun 529: nd6log((LOG_INFO,
1.27 itojun 530: "ip6_input: packet to an unready address %s->%s\n",
1.24 itojun 531: ip6_sprintf(&ip6->ip6_src),
1.34 itojun 532: ip6_sprintf(&ip6->ip6_dst)));
1.24 itojun 533:
534: goto bad;
1.2 itojun 535: }
536: }
537:
538: /*
1.55 itojun 539: * FAITH (Firewall Aided Internet Translator)
1.2 itojun 540: */
541: #if defined(NFAITH) && 0 < NFAITH
542: if (ip6_keepfaith) {
1.64.2.1 skrll 543: if (ip6_forward_rt.ro_rt && ip6_forward_rt.ro_rt->rt_ifp &&
544: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2 itojun 545: /* XXX do we need more sanity checks? */
546: ours = 1;
1.45 itojun 547: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9 itojun 548: goto hbhcheck;
549: }
550: }
551: #endif
552:
553: #if 0
554: {
555: /*
556: * Last resort: check in6_ifaddr for incoming interface.
557: * The code is here until I update the "goto ours hack" code above
558: * working right.
559: */
560: struct ifaddr *ifa;
561: for (ifa = m->m_pkthdr.rcvif->if_addrlist.tqh_first;
562: ifa;
563: ifa = ifa->ifa_list.tqe_next) {
564: if (ifa->ifa_addr == NULL)
565: continue; /* just for safety */
566: if (ifa->ifa_addr->sa_family != AF_INET6)
567: continue;
568: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
569: ours = 1;
570: deliverifp = ifa->ifa_ifp;
1.2 itojun 571: goto hbhcheck;
572: }
573: }
1.9 itojun 574: }
1.2 itojun 575: #endif
576:
577: /*
578: * Now there is no reason to process the packet if it's not our own
579: * and we're not a router.
580: */
581: if (!ip6_forwarding) {
582: ip6stat.ip6s_cantforward++;
1.9 itojun 583: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 584: goto bad;
585: }
586:
587: hbhcheck:
588: /*
589: * Process Hop-by-Hop options header if it's contained.
590: * m may be modified in ip6_hopopts_input().
591: * If a JumboPayload option is included, plen will also be modified.
592: */
593: plen = (u_int32_t)ntohs(ip6->ip6_plen);
594: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 595: struct ip6_hbh *hbh;
596:
597: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
598: #if 0 /*touches NULL pointer*/
599: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
600: #endif
1.2 itojun 601: return; /* m have already been freed */
1.9 itojun 602: }
1.22 itojun 603:
1.2 itojun 604: /* adjust pointer */
605: ip6 = mtod(m, struct ip6_hdr *);
1.22 itojun 606:
607: /*
1.49 itojun 608: * if the payload length field is 0 and the next header field
1.22 itojun 609: * indicates Hop-by-Hop Options header, then a Jumbo Payload
610: * option MUST be included.
611: */
612: if (ip6->ip6_plen == 0 && plen == 0) {
613: /*
614: * Note that if a valid jumbo payload option is
615: * contained, ip6_hoptops_input() must set a valid
1.55 itojun 616: * (non-zero) payload length to the variable plen.
1.22 itojun 617: */
618: ip6stat.ip6s_badoptions++;
619: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
620: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
621: icmp6_error(m, ICMP6_PARAM_PROB,
622: ICMP6_PARAMPROB_HEADER,
623: (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
624: return;
625: }
1.9 itojun 626: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
627: sizeof(struct ip6_hbh));
628: if (hbh == NULL) {
629: ip6stat.ip6s_tooshort++;
630: return;
631: }
1.57 thorpej 632: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9 itojun 633: nxt = hbh->ip6h_nxt;
1.2 itojun 634:
635: /*
636: * accept the packet if a router alert option is included
637: * and we act as an IPv6 router.
638: */
1.5 itojun 639: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 640: ours = 1;
641: } else
642: nxt = ip6->ip6_nxt;
643:
644: /*
645: * Check that the amount of data in the buffers
646: * is as at least much as the IPv6 header would have us expect.
647: * Trim mbufs if longer than we expect.
648: * Drop packet if shorter than we expect.
649: */
650: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
651: ip6stat.ip6s_tooshort++;
1.9 itojun 652: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 653: goto bad;
654: }
655: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
656: if (m->m_len == m->m_pkthdr.len) {
657: m->m_len = sizeof(struct ip6_hdr) + plen;
658: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
659: } else
660: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
661: }
662:
663: /*
664: * Forward if desirable.
665: */
666: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
667: /*
668: * If we are acting as a multicast router, all
669: * incoming multicast packets are passed to the
670: * kernel-level multicast forwarding function.
671: * The packet is returned (relatively) intact; if
672: * ip6_mforward() returns a non-zero value, the packet
673: * must be discarded, else it may be accepted below.
674: */
675: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
676: ip6stat.ip6s_cantforward++;
677: m_freem(m);
678: return;
679: }
680: if (!ours) {
681: m_freem(m);
682: return;
683: }
1.22 itojun 684: } else if (!ours) {
1.64 itojun 685: ip6_forward(m, srcrt);
1.2 itojun 686: return;
1.56 itojun 687: }
1.25 itojun 688:
689: ip6 = mtod(m, struct ip6_hdr *);
690:
691: /*
692: * Malicious party may be able to use IPv4 mapped addr to confuse
693: * tcp/udp stack and bypass security checks (act as if it was from
694: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
695: *
696: * For SIIT end node behavior, you may want to disable the check.
697: * However, you will become vulnerable to attacks using IPv4 mapped
698: * source.
699: */
700: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
701: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
702: ip6stat.ip6s_badscope++;
703: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
704: goto bad;
705: }
1.2 itojun 706:
707: /*
708: * Tell launch routine the next header
709: */
1.12 itojun 710: #ifdef IFA_STATS
1.28 itojun 711: if (deliverifp != NULL) {
1.9 itojun 712: struct in6_ifaddr *ia6;
713: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
714: if (ia6)
715: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
716: }
717: #endif
1.2 itojun 718: ip6stat.ip6s_delivered++;
1.9 itojun 719: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 720: nest = 0;
1.40 itojun 721:
1.2 itojun 722: while (nxt != IPPROTO_DONE) {
723: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
724: ip6stat.ip6s_toomanyhdr++;
725: goto bad;
726: }
1.8 itojun 727:
728: /*
729: * protection against faulty packet - there should be
730: * more sanity checks in header chain processing.
731: */
732: if (m->m_pkthdr.len < off) {
733: ip6stat.ip6s_tooshort++;
1.9 itojun 734: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 735: goto bad;
736: }
737:
1.37 itojun 738: #ifdef IPSEC
739: /*
740: * enforce IPsec policy checking if we are seeing last header.
741: * note that we do not visit this with protocols with pcb layer
742: * code - like udp/tcp/raw ip.
743: */
744: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
745: ipsec6_in_reject(m, NULL)) {
746: ipsec6stat.in_polvio++;
747: goto bad;
748: }
749: #endif
1.56 itojun 750:
1.2 itojun 751: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
752: }
753: return;
754: bad:
755: m_freem(m);
756: }
757:
758: /*
759: * Hop-by-Hop options header processing. If a valid jumbo payload option is
760: * included, the real payload length will be stored in plenp.
761: */
762: static int
763: ip6_hopopts_input(plenp, rtalertp, mp, offp)
764: u_int32_t *plenp;
1.5 itojun 765: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 766: struct mbuf **mp;
767: int *offp;
768: {
1.35 itojun 769: struct mbuf *m = *mp;
1.2 itojun 770: int off = *offp, hbhlen;
771: struct ip6_hbh *hbh;
772:
773: /* validation of the length of the header */
1.9 itojun 774: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
775: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
776: if (hbh == NULL) {
777: ip6stat.ip6s_tooshort++;
778: return -1;
779: }
780: hbhlen = (hbh->ip6h_len + 1) << 3;
781: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
782: hbhlen);
783: if (hbh == NULL) {
784: ip6stat.ip6s_tooshort++;
785: return -1;
786: }
1.57 thorpej 787: KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2 itojun 788: off += hbhlen;
789: hbhlen -= sizeof(struct ip6_hbh);
790:
791: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
792: hbhlen, rtalertp, plenp) < 0)
1.58 itojun 793: return (-1);
1.2 itojun 794:
795: *offp = off;
796: *mp = m;
1.58 itojun 797: return (0);
1.2 itojun 798: }
799:
800: /*
801: * Search header for all Hop-by-hop options and process each option.
802: * This function is separate from ip6_hopopts_input() in order to
803: * handle a case where the sending node itself process its hop-by-hop
804: * options header. In such a case, the function is called from ip6_output().
1.55 itojun 805: *
806: * The function assumes that hbh header is located right after the IPv6 header
807: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
808: * opthead + hbhlen is located in continuous memory region.
1.2 itojun 809: */
810: int
811: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
812: struct mbuf *m;
813: u_int8_t *opthead;
814: int hbhlen;
1.5 itojun 815: u_int32_t *rtalertp;
1.2 itojun 816: u_int32_t *plenp;
817: {
818: struct ip6_hdr *ip6;
819: int optlen = 0;
820: u_int8_t *opt = opthead;
821: u_int16_t rtalert_val;
1.22 itojun 822: u_int32_t jumboplen;
1.55 itojun 823: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2 itojun 824:
825: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35 itojun 826: switch (*opt) {
827: case IP6OPT_PAD1:
828: optlen = 1;
829: break;
830: case IP6OPT_PADN:
831: if (hbhlen < IP6OPT_MINLEN) {
832: ip6stat.ip6s_toosmall++;
833: goto bad;
834: }
835: optlen = *(opt + 1) + 2;
836: break;
837: case IP6OPT_RTALERT:
838: /* XXX may need check for alignment */
839: if (hbhlen < IP6OPT_RTALERT_LEN) {
840: ip6stat.ip6s_toosmall++;
841: goto bad;
842: }
843: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55 itojun 844: /* XXX stat */
845: icmp6_error(m, ICMP6_PARAM_PROB,
846: ICMP6_PARAMPROB_HEADER,
847: erroff + opt + 1 - opthead);
848: return (-1);
1.35 itojun 849: }
850: optlen = IP6OPT_RTALERT_LEN;
851: bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
852: *rtalertp = ntohs(rtalert_val);
853: break;
854: case IP6OPT_JUMBO:
1.22 itojun 855: /* XXX may need check for alignment */
856: if (hbhlen < IP6OPT_JUMBO_LEN) {
857: ip6stat.ip6s_toosmall++;
858: goto bad;
859: }
1.35 itojun 860: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55 itojun 861: /* XXX stat */
862: icmp6_error(m, ICMP6_PARAM_PROB,
863: ICMP6_PARAMPROB_HEADER,
864: erroff + opt + 1 - opthead);
865: return (-1);
1.35 itojun 866: }
1.22 itojun 867: optlen = IP6OPT_JUMBO_LEN;
868:
869: /*
870: * IPv6 packets that have non 0 payload length
1.35 itojun 871: * must not contain a jumbo payload option.
1.22 itojun 872: */
873: ip6 = mtod(m, struct ip6_hdr *);
874: if (ip6->ip6_plen) {
875: ip6stat.ip6s_badoptions++;
876: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 877: ICMP6_PARAMPROB_HEADER,
878: erroff + opt - opthead);
879: return (-1);
1.22 itojun 880: }
1.2 itojun 881:
1.22 itojun 882: /*
883: * We may see jumbolen in unaligned location, so
884: * we'd need to perform bcopy().
885: */
886: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
887: jumboplen = (u_int32_t)htonl(jumboplen);
888:
889: #if 1
890: /*
891: * if there are multiple jumbo payload options,
892: * *plenp will be non-zero and the packet will be
893: * rejected.
894: * the behavior may need some debate in ipngwg -
895: * multiple options does not make sense, however,
896: * there's no explicit mention in specification.
897: */
898: if (*plenp != 0) {
899: ip6stat.ip6s_badoptions++;
900: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 901: ICMP6_PARAMPROB_HEADER,
902: erroff + opt + 2 - opthead);
903: return (-1);
1.22 itojun 904: }
1.8 itojun 905: #endif
1.2 itojun 906:
1.22 itojun 907: /*
908: * jumbo payload length must be larger than 65535.
909: */
910: if (jumboplen <= IPV6_MAXPACKET) {
911: ip6stat.ip6s_badoptions++;
912: icmp6_error(m, ICMP6_PARAM_PROB,
1.55 itojun 913: ICMP6_PARAMPROB_HEADER,
914: erroff + opt + 2 - opthead);
915: return (-1);
1.22 itojun 916: }
917: *plenp = jumboplen;
918:
919: break;
1.35 itojun 920: default: /* unknown option */
921: if (hbhlen < IP6OPT_MINLEN) {
922: ip6stat.ip6s_toosmall++;
923: goto bad;
924: }
1.55 itojun 925: optlen = ip6_unknown_opt(opt, m,
926: erroff + opt - opthead);
927: if (optlen == -1)
928: return (-1);
1.35 itojun 929: optlen += 2;
930: break;
1.2 itojun 931: }
932: }
933:
1.55 itojun 934: return (0);
1.2 itojun 935:
936: bad:
937: m_freem(m);
1.55 itojun 938: return (-1);
1.2 itojun 939: }
940:
941: /*
942: * Unknown option processing.
943: * The third argument `off' is the offset from the IPv6 header to the option,
944: * which is necessary if the IPv6 header the and option header and IPv6 header
945: * is not continuous in order to return an ICMPv6 error.
946: */
947: int
948: ip6_unknown_opt(optp, m, off)
949: u_int8_t *optp;
950: struct mbuf *m;
951: int off;
952: {
953: struct ip6_hdr *ip6;
954:
1.35 itojun 955: switch (IP6OPT_TYPE(*optp)) {
956: case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58 itojun 957: return ((int)*(optp + 1));
1.35 itojun 958: case IP6OPT_TYPE_DISCARD: /* silently discard */
959: m_freem(m);
1.58 itojun 960: return (-1);
1.35 itojun 961: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
962: ip6stat.ip6s_badoptions++;
963: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 964: return (-1);
1.35 itojun 965: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
966: ip6stat.ip6s_badoptions++;
967: ip6 = mtod(m, struct ip6_hdr *);
968: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
969: (m->m_flags & (M_BCAST|M_MCAST)))
970: m_freem(m);
971: else
972: icmp6_error(m, ICMP6_PARAM_PROB,
973: ICMP6_PARAMPROB_OPTION, off);
1.58 itojun 974: return (-1);
1.2 itojun 975: }
976:
977: m_freem(m); /* XXX: NOTREACHED */
1.58 itojun 978: return (-1);
1.2 itojun 979: }
980:
981: /*
1.9 itojun 982: * Create the "control" list for this pcb.
983: *
984: * The routine will be called from upper layer handlers like tcp6_input().
985: * Thus the routine assumes that the caller (tcp6_input) have already
986: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
987: * very first mbuf on the mbuf chain.
988: * We may want to add some infinite loop prevention or sanity checks for safety.
989: * (This applies only when you are using KAME mbuf chain restriction, i.e.
990: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 991: */
992: void
993: ip6_savecontrol(in6p, mp, ip6, m)
1.35 itojun 994: struct in6pcb *in6p;
995: struct mbuf **mp;
996: struct ip6_hdr *ip6;
997: struct mbuf *m;
1.2 itojun 998: {
1.9 itojun 999:
1000: #ifdef SO_TIMESTAMP
1.2 itojun 1001: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
1002: struct timeval tv;
1003:
1004: microtime(&tv);
1005: *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
1.63 itojun 1006: SCM_TIMESTAMP, SOL_SOCKET);
1.2 itojun 1007: if (*mp)
1008: mp = &(*mp)->m_next;
1009: }
1.9 itojun 1010: #endif
1.2 itojun 1011: if (in6p->in6p_flags & IN6P_RECVDSTADDR) {
1012: *mp = sbcreatecontrol((caddr_t) &ip6->ip6_dst,
1.63 itojun 1013: sizeof(struct in6_addr), IPV6_RECVDSTADDR, IPPROTO_IPV6);
1.2 itojun 1014: if (*mp)
1015: mp = &(*mp)->m_next;
1016: }
1017:
1018: #ifdef noyet
1019: /* options were tossed above */
1020: if (in6p->in6p_flags & IN6P_RECVOPTS)
1021: /* broken */
1022: /* ip6_srcroute doesn't do what we want here, need to fix */
1023: if (in6p->in6p_flags & IPV6P_RECVRETOPTS)
1024: /* broken */
1025: #endif
1026:
1027: /* RFC 2292 sec. 5 */
1.35 itojun 1028: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2 itojun 1029: struct in6_pktinfo pi6;
1030: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1031: if (IN6_IS_SCOPE_LINKLOCAL(&pi6.ipi6_addr))
1032: pi6.ipi6_addr.s6_addr16[1] = 0;
1033: pi6.ipi6_ifindex = (m && m->m_pkthdr.rcvif)
1034: ? m->m_pkthdr.rcvif->if_index
1035: : 0;
1036: *mp = sbcreatecontrol((caddr_t) &pi6,
1.63 itojun 1037: sizeof(struct in6_pktinfo), IPV6_PKTINFO, IPPROTO_IPV6);
1.2 itojun 1038: if (*mp)
1039: mp = &(*mp)->m_next;
1040: }
1041: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
1042: int hlim = ip6->ip6_hlim & 0xff;
1.63 itojun 1043: *mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),
1044: IPV6_HOPLIMIT, IPPROTO_IPV6);
1.2 itojun 1045: if (*mp)
1046: mp = &(*mp)->m_next;
1047: }
1048: /* IN6P_NEXTHOP - for outgoing packet only */
1049:
1050: /*
1.64.2.1 skrll 1051: * IPV6_HOPOPTS socket option. Recall that we required super-user
1052: * privilege for the option (see ip6_ctloutput), but it might be too
1053: * strict, since there might be some hop-by-hop options which can be
1054: * returned to normal user.
1055: * See also RFC 2292 section 6.
1.2 itojun 1056: */
1.64.2.1 skrll 1057: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2 itojun 1058: /*
1059: * Check if a hop-by-hop options header is contatined in the
1060: * received packet, and if so, store the options as ancillary
1061: * data. Note that a hop-by-hop options header must be
1062: * just after the IPv6 header, which fact is assured through
1063: * the IPv6 input processing.
1064: */
1065: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1066: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 1067: struct ip6_hbh *hbh;
1068: int hbhlen;
1.62 itojun 1069: struct mbuf *ext;
1.9 itojun 1070:
1.62 itojun 1071: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1072: ip6->ip6_nxt);
1073: if (ext == NULL) {
1.9 itojun 1074: ip6stat.ip6s_tooshort++;
1075: return;
1076: }
1.62 itojun 1077: hbh = mtod(ext, struct ip6_hbh *);
1.9 itojun 1078: hbhlen = (hbh->ip6h_len + 1) << 3;
1.62 itojun 1079: if (hbhlen != ext->m_len) {
1080: m_freem(ext);
1.9 itojun 1081: ip6stat.ip6s_tooshort++;
1082: return;
1083: }
1.2 itojun 1084:
1085: /*
1086: * XXX: We copy whole the header even if a jumbo
1087: * payload option is included, which option is to
1088: * be removed before returning in the RFC 2292.
1089: * But it's too painful operation...
1090: */
1.9 itojun 1091: *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
1.63 itojun 1092: IPV6_HOPOPTS, IPPROTO_IPV6);
1.2 itojun 1093: if (*mp)
1094: mp = &(*mp)->m_next;
1.62 itojun 1095: m_freem(ext);
1.2 itojun 1096: }
1097: }
1098:
1099: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
1100: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1101: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1.60 simonb 1102: int nxt = ip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2 itojun 1103:
1104: /*
1105: * Search for destination options headers or routing
1106: * header(s) through the header chain, and stores each
1107: * header as ancillary data.
1108: * Note that the order of the headers remains in
1109: * the chain of ancillary data.
1110: */
1.35 itojun 1111: while (1) { /* is explicit loop prevention necessary? */
1.62 itojun 1112: struct ip6_ext *ip6e = NULL;
1.9 itojun 1113: int elen;
1.62 itojun 1114: struct mbuf *ext = NULL;
1.9 itojun 1115:
1.62 itojun 1116: /*
1117: * if it is not an extension header, don't try to
1118: * pull it from the chain.
1119: */
1120: switch (nxt) {
1121: case IPPROTO_DSTOPTS:
1122: case IPPROTO_ROUTING:
1123: case IPPROTO_HOPOPTS:
1124: case IPPROTO_AH: /* is it possible? */
1125: break;
1126: default:
1127: goto loopend;
1128: }
1129:
1130: ext = ip6_pullexthdr(m, off, nxt);
1131: if (ext == NULL) {
1.9 itojun 1132: ip6stat.ip6s_tooshort++;
1133: return;
1134: }
1.62 itojun 1135: ip6e = mtod(ext, struct ip6_ext *);
1.9 itojun 1136: if (nxt == IPPROTO_AH)
1137: elen = (ip6e->ip6e_len + 2) << 2;
1138: else
1139: elen = (ip6e->ip6e_len + 1) << 3;
1.62 itojun 1140: if (elen != ext->m_len) {
1141: m_freem(ext);
1.9 itojun 1142: ip6stat.ip6s_tooshort++;
1143: return;
1144: }
1.57 thorpej 1145: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2 itojun 1146:
1.35 itojun 1147: switch (nxt) {
1.62 itojun 1148: case IPPROTO_DSTOPTS:
1.35 itojun 1149: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1150: break;
1151:
1152: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.63 itojun 1153: IPV6_DSTOPTS, IPPROTO_IPV6);
1.35 itojun 1154: if (*mp)
1155: mp = &(*mp)->m_next;
1156: break;
1157:
1158: case IPPROTO_ROUTING:
1159: if (!in6p->in6p_flags & IN6P_RTHDR)
1160: break;
1161:
1162: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.63 itojun 1163: IPV6_RTHDR, IPPROTO_IPV6);
1.35 itojun 1164: if (*mp)
1165: mp = &(*mp)->m_next;
1166: break;
1167:
1.62 itojun 1168: case IPPROTO_HOPOPTS:
1169: case IPPROTO_AH: /* is it possible? */
1170: break;
1171:
1.35 itojun 1172: default:
1173: /*
1.62 itojun 1174: * other cases have been filtered in the above.
1175: * none will visit this case. here we supply
1176: * the code just in case (nxt overwritten or
1177: * other cases).
1.35 itojun 1178: */
1.62 itojun 1179: m_freem(ext);
1.35 itojun 1180: goto loopend;
1181:
1.2 itojun 1182: }
1183:
1184: /* proceed with the next header. */
1.9 itojun 1185: off += elen;
1.2 itojun 1186: nxt = ip6e->ip6e_nxt;
1.62 itojun 1187: ip6e = NULL;
1188: m_freem(ext);
1189: ext = NULL;
1.2 itojun 1190: }
1191: loopend:
1.62 itojun 1192: ;
1.2 itojun 1193: }
1.62 itojun 1194: }
1195:
1196: /*
1197: * pull single extension header from mbuf chain. returns single mbuf that
1198: * contains the result, or NULL on error.
1199: */
1200: static struct mbuf *
1201: ip6_pullexthdr(m, off, nxt)
1202: struct mbuf *m;
1203: size_t off;
1204: int nxt;
1205: {
1206: struct ip6_ext ip6e;
1207: size_t elen;
1208: struct mbuf *n;
1209:
1210: #ifdef DIAGNOSTIC
1211: switch (nxt) {
1212: case IPPROTO_DSTOPTS:
1213: case IPPROTO_ROUTING:
1214: case IPPROTO_HOPOPTS:
1215: case IPPROTO_AH: /* is it possible? */
1216: break;
1217: default:
1218: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2 itojun 1219: }
1.62 itojun 1220: #endif
1.2 itojun 1221:
1.62 itojun 1222: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1223: if (nxt == IPPROTO_AH)
1224: elen = (ip6e.ip6e_len + 2) << 2;
1225: else
1226: elen = (ip6e.ip6e_len + 1) << 3;
1227:
1228: MGET(n, M_DONTWAIT, MT_DATA);
1229: if (n && elen >= MLEN) {
1230: MCLGET(n, M_DONTWAIT);
1231: if ((n->m_flags & M_EXT) == 0) {
1232: m_free(n);
1233: n = NULL;
1234: }
1235: }
1236: if (!n)
1237: return NULL;
1238:
1239: n->m_len = 0;
1240: if (elen >= M_TRAILINGSPACE(n)) {
1241: m_free(n);
1242: return NULL;
1243: }
1244:
1245: m_copydata(m, off, elen, mtod(n, caddr_t));
1246: n->m_len = elen;
1247: return n;
1.2 itojun 1248: }
1249:
1250: /*
1251: * Get pointer to the previous header followed by the header
1252: * currently processed.
1253: * XXX: This function supposes that
1254: * M includes all headers,
1255: * the next header field and the header length field of each header
1256: * are valid, and
1257: * the sum of each header length equals to OFF.
1258: * Because of these assumptions, this function must be called very
1259: * carefully. Moreover, it will not be used in the near future when
1260: * we develop `neater' mechanism to process extension headers.
1261: */
1.58 itojun 1262: u_int8_t *
1.2 itojun 1263: ip6_get_prevhdr(m, off)
1264: struct mbuf *m;
1265: int off;
1266: {
1267: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1268:
1269: if (off == sizeof(struct ip6_hdr))
1.58 itojun 1270: return (&ip6->ip6_nxt);
1.2 itojun 1271: else {
1272: int len, nxt;
1273: struct ip6_ext *ip6e = NULL;
1274:
1275: nxt = ip6->ip6_nxt;
1276: len = sizeof(struct ip6_hdr);
1277: while (len < off) {
1278: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
1279:
1.35 itojun 1280: switch (nxt) {
1.2 itojun 1281: case IPPROTO_FRAGMENT:
1282: len += sizeof(struct ip6_frag);
1283: break;
1284: case IPPROTO_AH:
1285: len += (ip6e->ip6e_len + 2) << 2;
1286: break;
1287: default:
1288: len += (ip6e->ip6e_len + 1) << 3;
1289: break;
1290: }
1291: nxt = ip6e->ip6e_nxt;
1292: }
1293: if (ip6e)
1.58 itojun 1294: return (&ip6e->ip6e_nxt);
1.2 itojun 1295: else
1296: return NULL;
1.18 itojun 1297: }
1298: }
1299:
1300: /*
1301: * get next header offset. m will be retained.
1302: */
1303: int
1304: ip6_nexthdr(m, off, proto, nxtp)
1305: struct mbuf *m;
1306: int off;
1307: int proto;
1308: int *nxtp;
1309: {
1310: struct ip6_hdr ip6;
1311: struct ip6_ext ip6e;
1312: struct ip6_frag fh;
1313:
1314: /* just in case */
1315: if (m == NULL)
1316: panic("ip6_nexthdr: m == NULL");
1317: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1318: return -1;
1319:
1320: switch (proto) {
1321: case IPPROTO_IPV6:
1322: if (m->m_pkthdr.len < off + sizeof(ip6))
1323: return -1;
1324: m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
1325: if (nxtp)
1326: *nxtp = ip6.ip6_nxt;
1327: off += sizeof(ip6);
1328: return off;
1329:
1330: case IPPROTO_FRAGMENT:
1331: /*
1332: * terminate parsing if it is not the first fragment,
1333: * it does not make sense to parse through it.
1334: */
1335: if (m->m_pkthdr.len < off + sizeof(fh))
1336: return -1;
1337: m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
1.64.2.1 skrll 1338: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18 itojun 1339: return -1;
1340: if (nxtp)
1341: *nxtp = fh.ip6f_nxt;
1342: off += sizeof(struct ip6_frag);
1343: return off;
1344:
1345: case IPPROTO_AH:
1346: if (m->m_pkthdr.len < off + sizeof(ip6e))
1347: return -1;
1348: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1349: if (nxtp)
1350: *nxtp = ip6e.ip6e_nxt;
1351: off += (ip6e.ip6e_len + 2) << 2;
1.47 itojun 1352: if (m->m_pkthdr.len < off)
1353: return -1;
1.18 itojun 1354: return off;
1355:
1356: case IPPROTO_HOPOPTS:
1357: case IPPROTO_ROUTING:
1358: case IPPROTO_DSTOPTS:
1359: if (m->m_pkthdr.len < off + sizeof(ip6e))
1360: return -1;
1361: m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1362: if (nxtp)
1363: *nxtp = ip6e.ip6e_nxt;
1364: off += (ip6e.ip6e_len + 1) << 3;
1.47 itojun 1365: if (m->m_pkthdr.len < off)
1366: return -1;
1.18 itojun 1367: return off;
1368:
1369: case IPPROTO_NONE:
1370: case IPPROTO_ESP:
1371: case IPPROTO_IPCOMP:
1372: /* give up */
1373: return -1;
1374:
1375: default:
1376: return -1;
1377: }
1378: }
1379:
1380: /*
1381: * get offset for the last header in the chain. m will be kept untainted.
1382: */
1383: int
1384: ip6_lasthdr(m, off, proto, nxtp)
1385: struct mbuf *m;
1386: int off;
1387: int proto;
1388: int *nxtp;
1389: {
1390: int newoff;
1391: int nxt;
1392:
1393: if (!nxtp) {
1394: nxt = -1;
1395: nxtp = &nxt;
1396: }
1397: while (1) {
1398: newoff = ip6_nexthdr(m, off, proto, nxtp);
1399: if (newoff < 0)
1400: return off;
1401: else if (newoff < off)
1402: return -1; /* invalid */
1403: else if (newoff == off)
1404: return newoff;
1405:
1406: off = newoff;
1407: proto = *nxtp;
1.2 itojun 1408: }
1409: }
1410:
1411: /*
1412: * System control for IP6
1413: */
1414:
1415: u_char inet6ctlerrmap[PRC_NCMDS] = {
1416: 0, 0, 0, 0,
1417: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1418: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1419: EMSGSIZE, EHOSTUNREACH, 0, 0,
1420: 0, 0, 0, 0,
1421: ENOPROTOOPT
1422: };
1423:
1.64.2.1 skrll 1424: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2 itojun 1425: {
1.26 itojun 1426:
1.64.2.1 skrll 1427: sysctl_createv(clog, 0, NULL, NULL,
1428: CTLFLAG_PERMANENT,
1429: CTLTYPE_NODE, "net", NULL,
1430: NULL, 0, NULL, 0,
1431: CTL_NET, CTL_EOL);
1432: sysctl_createv(clog, 0, NULL, NULL,
1433: CTLFLAG_PERMANENT,
1434: CTLTYPE_NODE, "inet6",
1435: SYSCTL_DESCR("PF_INET6 related settings"),
1436: NULL, 0, NULL, 0,
1437: CTL_NET, PF_INET6, CTL_EOL);
1438: sysctl_createv(clog, 0, NULL, NULL,
1439: CTLFLAG_PERMANENT,
1440: CTLTYPE_NODE, "ip6",
1441: SYSCTL_DESCR("IPv6 related settings"),
1442: NULL, 0, NULL, 0,
1443: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
1444:
1445: sysctl_createv(clog, 0, NULL, NULL,
1446: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1447: CTLTYPE_INT, "forwarding",
1448: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1449: NULL, 0, &ip6_forwarding, 0,
1450: CTL_NET, PF_INET6, IPPROTO_IPV6,
1451: IPV6CTL_FORWARDING, CTL_EOL);
1452: sysctl_createv(clog, 0, NULL, NULL,
1453: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1454: CTLTYPE_INT, "redirect",
1455: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1456: NULL, 0, &ip6_sendredirects, 0,
1457: CTL_NET, PF_INET6, IPPROTO_IPV6,
1458: IPV6CTL_SENDREDIRECTS, CTL_EOL);
1459: sysctl_createv(clog, 0, NULL, NULL,
1460: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1461: CTLTYPE_INT, "hlim",
1462: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1463: NULL, 0, &ip6_defhlim, 0,
1464: CTL_NET, PF_INET6, IPPROTO_IPV6,
1465: IPV6CTL_DEFHLIM, CTL_EOL);
1466: #ifdef notyet
1467: sysctl_createv(clog, 0, NULL, NULL,
1468: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1469: CTLTYPE_INT, "mtu", NULL,
1470: NULL, 0, &, 0,
1471: CTL_NET, PF_INET6, IPPROTO_IPV6,
1472: IPV6CTL_DEFMTU, CTL_EOL);
1473: #endif
1474: #ifdef __no_idea__
1475: sysctl_createv(clog, 0, NULL, NULL,
1476: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1477: CTLTYPE_INT, "forwsrcrt", NULL,
1478: NULL, 0, &?, 0,
1479: CTL_NET, PF_INET6, IPPROTO_IPV6,
1480: IPV6CTL_FORWSRCRT, CTL_EOL);
1481: sysctl_createv(clog, 0, NULL, NULL,
1482: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1483: CTLTYPE_STRUCT, "stats", NULL,
1484: NULL, 0, &?, sizeof(?),
1485: CTL_NET, PF_INET6, IPPROTO_IPV6,
1486: IPV6CTL_STATS, CTL_EOL);
1487: sysctl_createv(clog, 0, NULL, NULL,
1488: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1489: CTLTYPE_STRUCT, "mrtstats", NULL,
1490: NULL, 0, &?, sizeof(?),
1491: CTL_NET, PF_INET6, IPPROTO_IPV6,
1492: IPV6CTL_MRTSTATS, CTL_EOL);
1493: sysctl_createv(clog, 0, NULL, NULL,
1494: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1495: CTLTYPE_?, "mrtproto", NULL,
1496: NULL, 0, &?, sizeof(?),
1497: CTL_NET, PF_INET6, IPPROTO_IPV6,
1498: IPV6CTL_MRTPROTO, CTL_EOL);
1499: #endif
1500: sysctl_createv(clog, 0, NULL, NULL,
1501: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1502: CTLTYPE_INT, "maxfragpackets",
1503: SYSCTL_DESCR("Maximum number of fragments to buffer "
1504: "for reassembly"),
1505: NULL, 0, &ip6_maxfragpackets, 0,
1506: CTL_NET, PF_INET6, IPPROTO_IPV6,
1507: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
1508: #ifdef __no_idea__
1509: sysctl_createv(clog, 0, NULL, NULL,
1510: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1511: CTLTYPE_INT, "sourcecheck", NULL,
1512: NULL, 0, &?, 0,
1513: CTL_NET, PF_INET6, IPPROTO_IPV6,
1514: IPV6CTL_SOURCECHECK, CTL_EOL);
1515: sysctl_createv(clog, 0, NULL, NULL,
1516: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1517: CTLTYPE_INT, "sourcecheck_logint", NULL,
1518: NULL, 0, &?, 0,
1519: CTL_NET, PF_INET6, IPPROTO_IPV6,
1520: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
1521: #endif
1522: sysctl_createv(clog, 0, NULL, NULL,
1523: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1524: CTLTYPE_INT, "accept_rtadv",
1525: SYSCTL_DESCR("Accept router advertisements"),
1526: NULL, 0, &ip6_accept_rtadv, 0,
1527: CTL_NET, PF_INET6, IPPROTO_IPV6,
1528: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1529: sysctl_createv(clog, 0, NULL, NULL,
1530: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1531: CTLTYPE_INT, "keepfaith",
1532: SYSCTL_DESCR("Activate faith interface"),
1533: NULL, 0, &ip6_keepfaith, 0,
1534: CTL_NET, PF_INET6, IPPROTO_IPV6,
1535: IPV6CTL_KEEPFAITH, CTL_EOL);
1536: sysctl_createv(clog, 0, NULL, NULL,
1537: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1538: CTLTYPE_INT, "log_interval",
1539: SYSCTL_DESCR("Minumum interval between logging "
1540: "unroutable packets"),
1541: NULL, 0, &ip6_log_interval, 0,
1542: CTL_NET, PF_INET6, IPPROTO_IPV6,
1543: IPV6CTL_LOG_INTERVAL, CTL_EOL);
1544: sysctl_createv(clog, 0, NULL, NULL,
1545: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1546: CTLTYPE_INT, "hdrnestlimit",
1547: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1548: NULL, 0, &ip6_hdrnestlimit, 0,
1549: CTL_NET, PF_INET6, IPPROTO_IPV6,
1550: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1551: sysctl_createv(clog, 0, NULL, NULL,
1552: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1553: CTLTYPE_INT, "dad_count",
1554: SYSCTL_DESCR("Number of Duplicate Address Detection "
1555: "probes to send"),
1556: NULL, 0, &ip6_dad_count, 0,
1557: CTL_NET, PF_INET6, IPPROTO_IPV6,
1558: IPV6CTL_DAD_COUNT, CTL_EOL);
1559: sysctl_createv(clog, 0, NULL, NULL,
1560: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1561: CTLTYPE_INT, "auto_flowlabel",
1562: SYSCTL_DESCR("Assign random IPv6 flow labels"),
1563: NULL, 0, &ip6_auto_flowlabel, 0,
1564: CTL_NET, PF_INET6, IPPROTO_IPV6,
1565: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1566: sysctl_createv(clog, 0, NULL, NULL,
1567: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1568: CTLTYPE_INT, "defmcasthlim",
1569: SYSCTL_DESCR("Default multicast hop limit"),
1570: NULL, 0, &ip6_defmcasthlim, 0,
1571: CTL_NET, PF_INET6, IPPROTO_IPV6,
1572: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51 itojun 1573: #if NGIF > 0
1.64.2.1 skrll 1574: sysctl_createv(clog, 0, NULL, NULL,
1575: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1576: CTLTYPE_INT, "gifhlim",
1577: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1578: NULL, 0, &ip6_gif_hlim, 0,
1579: CTL_NET, PF_INET6, IPPROTO_IPV6,
1580: IPV6CTL_GIF_HLIM, CTL_EOL);
1581: #endif /* NGIF */
1582: sysctl_createv(clog, 0, NULL, NULL,
1583: CTLFLAG_PERMANENT,
1584: CTLTYPE_STRING, "kame_version",
1585: SYSCTL_DESCR("KAME Version"),
1586: NULL, 0, __KAME_VERSION, 0,
1587: CTL_NET, PF_INET6, IPPROTO_IPV6,
1588: IPV6CTL_KAME_VERSION, CTL_EOL);
1589: sysctl_createv(clog, 0, NULL, NULL,
1590: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1591: CTLTYPE_INT, "use_deprecated",
1592: SYSCTL_DESCR("Allow use of deprecated addresses as "
1593: "source addresses"),
1594: NULL, 0, &ip6_use_deprecated, 0,
1595: CTL_NET, PF_INET6, IPPROTO_IPV6,
1596: IPV6CTL_USE_DEPRECATED, CTL_EOL);
1597: sysctl_createv(clog, 0, NULL, NULL,
1598: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1599: CTLTYPE_INT, "rr_prune", NULL,
1600: NULL, 0, &ip6_rr_prune, 0,
1601: CTL_NET, PF_INET6, IPPROTO_IPV6,
1602: IPV6CTL_RR_PRUNE, CTL_EOL);
1603: sysctl_createv(clog, 0, NULL, NULL,
1604: CTLFLAG_PERMANENT
1605: #ifndef INET6_BINDV6ONLY
1606: |CTLFLAG_READWRITE,
1607: #endif
1608: CTLTYPE_INT, "v6only",
1609: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
1610: "to PF_INET sockets"),
1611: NULL, 0, &ip6_v6only, 0,
1612: CTL_NET, PF_INET6, IPPROTO_IPV6,
1613: IPV6CTL_V6ONLY, CTL_EOL);
1614: sysctl_createv(clog, 0, NULL, NULL,
1615: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1616: CTLTYPE_INT, "anonportmin",
1617: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1618: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
1619: CTL_NET, PF_INET6, IPPROTO_IPV6,
1620: IPV6CTL_ANONPORTMIN, CTL_EOL);
1621: sysctl_createv(clog, 0, NULL, NULL,
1622: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1623: CTLTYPE_INT, "anonportmax",
1624: SYSCTL_DESCR("Highest ephemeral port number to assign"),
1625: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
1626: CTL_NET, PF_INET6, IPPROTO_IPV6,
1627: IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26 itojun 1628: #ifndef IPNOPRIVPORTS
1.64.2.1 skrll 1629: sysctl_createv(clog, 0, NULL, NULL,
1630: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1631: CTLTYPE_INT, "lowportmin",
1632: SYSCTL_DESCR("Lowest privileged ephemeral port number "
1633: "to assign"),
1634: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
1635: CTL_NET, PF_INET6, IPPROTO_IPV6,
1636: IPV6CTL_LOWPORTMIN, CTL_EOL);
1637: sysctl_createv(clog, 0, NULL, NULL,
1638: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1639: CTLTYPE_INT, "lowportmax",
1640: SYSCTL_DESCR("Highest privileged ephemeral port number "
1641: "to assign"),
1642: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
1643: CTL_NET, PF_INET6, IPPROTO_IPV6,
1644: IPV6CTL_LOWPORTMAX, CTL_EOL);
1645: #endif /* IPNOPRIVPORTS */
1646: sysctl_createv(clog, 0, NULL, NULL,
1647: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1648: CTLTYPE_INT, "maxfrags",
1649: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1650: NULL, 0, &ip6_maxfrags, 0,
1651: CTL_NET, PF_INET6, IPPROTO_IPV6,
1652: IPV6CTL_MAXFRAGS, CTL_EOL);
1.2 itojun 1653: }
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