Annotation of src/sys/netinet6/ip6_input.c, Revision 1.14
1.14 ! itojun 1: /* $NetBSD: ip6_input.c,v 1.13 2000/01/31 10:33:22 itojun Exp $ */
1.3 thorpej 2:
1.2 itojun 3: /*
4: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. Neither the name of the project nor the names of its contributors
16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
32: /*
33: * Copyright (c) 1982, 1986, 1988, 1993
34: * The Regents of the University of California. All rights reserved.
35: *
36: * Redistribution and use in source and binary forms, with or without
37: * modification, are permitted provided that the following conditions
38: * are met:
39: * 1. Redistributions of source code must retain the above copyright
40: * notice, this list of conditions and the following disclaimer.
41: * 2. Redistributions in binary form must reproduce the above copyright
42: * notice, this list of conditions and the following disclaimer in the
43: * documentation and/or other materials provided with the distribution.
44: * 3. All advertising materials mentioning features or use of this software
45: * must display the following acknowledgement:
46: * This product includes software developed by the University of
47: * California, Berkeley and its contributors.
48: * 4. Neither the name of the University nor the names of its contributors
49: * may be used to endorse or promote products derived from this software
50: * without specific prior written permission.
51: *
52: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62: * SUCH DAMAGE.
63: *
64: * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
65: */
66:
67: #include "opt_inet.h"
1.4 thorpej 68: #include "opt_ipsec.h"
1.2 itojun 69:
70: #include <sys/param.h>
71: #include <sys/systm.h>
72: #include <sys/malloc.h>
73: #include <sys/mbuf.h>
74: #include <sys/domain.h>
75: #include <sys/protosw.h>
76: #include <sys/socket.h>
77: #include <sys/socketvar.h>
78: #include <sys/errno.h>
79: #include <sys/time.h>
80: #include <sys/kernel.h>
81: #include <sys/syslog.h>
82: #include <sys/proc.h>
83:
84: #include <net/if.h>
85: #include <net/if_types.h>
86: #include <net/if_dl.h>
87: #include <net/route.h>
88: #include <net/netisr.h>
89:
90: #include <netinet/in.h>
1.9 itojun 91: #include <netinet/in_systm.h>
92: #ifdef INET
93: #include <netinet/ip.h>
94: #include <netinet/ip_icmp.h>
95: #endif /*INET*/
1.14 ! itojun 96: #include <netinet/ip6.h>
1.2 itojun 97: #include <netinet6/in6_var.h>
1.11 itojun 98: #include <netinet6/ip6_var.h>
1.2 itojun 99: #include <netinet6/in6_pcb.h>
1.14 ! itojun 100: #include <netinet/icmp6.h>
1.2 itojun 101: #include <netinet6/in6_ifattach.h>
102: #include <netinet6/nd6.h>
1.9 itojun 103: #include <netinet6/in6_prefix.h>
1.2 itojun 104:
1.9 itojun 105: #ifdef IPV6FIREWALL
106: #include <netinet6/ip6_fw.h>
107: #endif
1.2 itojun 108:
109: #include <netinet6/ip6protosw.h>
110:
111: /* we need it for NLOOP. */
112: #include "loop.h"
113: #include "faith.h"
114:
115: #include "gif.h"
116: #include "bpfilter.h"
117:
1.9 itojun 118: #include <net/net_osdep.h>
119:
1.2 itojun 120: extern struct domain inet6domain;
121: extern struct ip6protosw inet6sw[];
122:
123: u_char ip6_protox[IPPROTO_MAX];
124: static int ip6qmaxlen = IFQ_MAXLEN;
125: struct in6_ifaddr *in6_ifaddr;
126: struct ifqueue ip6intrq;
127:
128: extern struct ifnet loif[NLOOP];
129: int ip6_forward_srcrt; /* XXX */
130: int ip6_sourcecheck; /* XXX */
131: int ip6_sourcecheck_interval; /* XXX */
1.9 itojun 132:
133: #ifdef IPV6FIREWALL
134: /* firewall hooks */
135: ip6_fw_chk_t *ip6_fw_chk_ptr;
136: ip6_fw_ctl_t *ip6_fw_ctl_ptr;
1.2 itojun 137: #endif
138:
139: struct ip6stat ip6stat;
140:
141: static void ip6_init2 __P((void *));
142:
1.5 itojun 143: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
1.2 itojun 144:
1.12 itojun 145: #ifdef PTR
1.9 itojun 146: extern int ip6_protocol_tr;
147:
148: int ptr_in6 __P((struct mbuf *, struct mbuf **));
149: extern void ip_forward __P((struct mbuf *, int));
150: #endif
151:
1.2 itojun 152: /*
153: * IP6 initialization: fill in IP6 protocol switch table.
154: * All protocols not implemented in kernel go to raw IP6 protocol handler.
155: */
156: void
157: ip6_init()
158: {
159: register struct ip6protosw *pr;
160: register int i;
161: struct timeval tv;
162:
163: pr = (struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
164: if (pr == 0)
165: panic("ip6_init");
166: for (i = 0; i < IPPROTO_MAX; i++)
167: ip6_protox[i] = pr - inet6sw;
168: for (pr = (struct ip6protosw *)inet6domain.dom_protosw;
169: pr < (struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
170: if (pr->pr_domain->dom_family == PF_INET6 &&
171: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
172: ip6_protox[pr->pr_protocol] = pr - inet6sw;
173: ip6intrq.ifq_maxlen = ip6qmaxlen;
174: nd6_init();
175: frag6_init();
1.9 itojun 176: #ifdef IPV6FIREWALL
177: ip6_fw_init();
178: #endif
1.2 itojun 179: /*
180: * in many cases, random() here does NOT return random number
181: * as initialization during bootstrap time occur in fixed order.
182: */
183: microtime(&tv);
184: ip6_flow_seq = random() ^ tv.tv_usec;
185:
186: ip6_init2((void *)0);
187: }
188:
189: static void
190: ip6_init2(dummy)
191: void *dummy;
192: {
1.9 itojun 193: int ret;
194:
195: /* get EUI64 from somewhere */
196: ret = in6_ifattach_getifid(NULL);
1.2 itojun 197:
198: /*
199: * to route local address of p2p link to loopback,
200: * assign loopback address first.
201: */
1.9 itojun 202: in6_ifattach(&loif[0], IN6_IFT_LOOP, NULL, 0);
1.2 itojun 203:
204: /* nd6_timer_init */
205: timeout(nd6_timer, (caddr_t)0, hz);
1.9 itojun 206: /* router renumbering prefix list maintenance */
207: timeout(in6_rr_timer, (caddr_t)0, hz);
1.2 itojun 208: }
209:
210: /*
211: * IP6 input interrupt handling. Just pass the packet to ip6_input.
212: */
213: void
214: ip6intr()
215: {
216: int s;
217: struct mbuf *m;
218:
219: for (;;) {
220: s = splimp();
221: IF_DEQUEUE(&ip6intrq, m);
222: splx(s);
223: if (m == 0)
224: return;
225: ip6_input(m);
226: }
227: }
228:
229: extern struct route_in6 ip6_forward_rt;
230:
231: void
232: ip6_input(m)
233: struct mbuf *m;
234: {
1.9 itojun 235: struct ip6_hdr *ip6;
1.2 itojun 236: int off = sizeof(struct ip6_hdr), nest;
237: u_int32_t plen;
1.5 itojun 238: u_int32_t rtalert = ~0;
1.2 itojun 239: int nxt, ours = 0;
1.9 itojun 240: struct ifnet *deliverifp = NULL;
1.2 itojun 241:
242: #ifdef IPSEC
243: /*
244: * should the inner packet be considered authentic?
245: * see comment in ah4_input().
246: */
247: if (m) {
248: m->m_flags &= ~M_AUTHIPHDR;
249: m->m_flags &= ~M_AUTHIPDGM;
250: }
251: #endif
1.9 itojun 252:
1.2 itojun 253: /*
254: * mbuf statistics by kazu
255: */
256: if (m->m_flags & M_EXT) {
257: if (m->m_next)
258: ip6stat.ip6s_mext2m++;
259: else
260: ip6stat.ip6s_mext1++;
261: } else {
262: if (m->m_next) {
1.9 itojun 263: if (m->m_flags & M_LOOP) {
1.2 itojun 264: ip6stat.ip6s_m2m[loif[0].if_index]++; /*XXX*/
1.9 itojun 265: }
1.2 itojun 266: else if (m->m_pkthdr.rcvif->if_index <= 31)
267: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
268: else
269: ip6stat.ip6s_m2m[0]++;
270: } else
271: ip6stat.ip6s_m1++;
272: }
273:
1.9 itojun 274: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
275: ip6stat.ip6s_total++;
276:
277: #ifndef PULLDOWN_TEST
278: /* XXX is the line really necessary? */
1.2 itojun 279: IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), /*nothing*/);
1.9 itojun 280: #endif
1.2 itojun 281:
1.9 itojun 282: if (m->m_len < sizeof(struct ip6_hdr)) {
283: struct ifnet *inifp;
284: inifp = m->m_pkthdr.rcvif;
285: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == 0) {
286: ip6stat.ip6s_toosmall++;
287: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
288: return;
289: }
1.2 itojun 290: }
291:
292: ip6 = mtod(m, struct ip6_hdr *);
293:
294: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
295: ip6stat.ip6s_badvers++;
1.9 itojun 296: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2 itojun 297: goto bad;
298: }
299:
300: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
301:
1.9 itojun 302: #ifdef IPV6FIREWALL
303: /*
304: * Check with the firewall...
305: */
306: if (ip6_fw_chk_ptr) {
307: u_short port = 0;
308: /* If ipfw says divert, we have to just drop packet */
309: /* use port as a dummy argument */
310: if ((*ip6_fw_chk_ptr)(&ip6, NULL, &port, &m)) {
311: m_freem(m);
312: m = NULL;
313: }
314: if (!m)
315: return;
316: }
317: #endif
318:
1.2 itojun 319: /*
320: * Scope check
321: */
322: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
323: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
324: ip6stat.ip6s_badscope++;
1.9 itojun 325: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 326: goto bad;
327: }
1.13 itojun 328: /*
329: * The following check is not documented in the spec. Malicious party
330: * may be able to use IPv4 mapped addr to confuse tcp/udp stack and
331: * bypass security checks (act as if it was from 127.0.0.1 by using
332: * IPv6 src ::ffff:127.0.0.1). Be cautious.
333: */
334: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
335: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
336: ip6stat.ip6s_badscope++;
337: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
338: goto bad;
339: }
340: #if 1
341: /*
342: * We don't support it, so it is strange to get this.
343: */
344: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
345: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
346: ip6stat.ip6s_badscope++;
347: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
348: goto bad;
349: }
350: #endif
1.2 itojun 351: if (IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src) ||
352: IN6_IS_ADDR_LOOPBACK(&ip6->ip6_dst)) {
353: if (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) {
354: ours = 1;
1.9 itojun 355: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 356: goto hbhcheck;
357: } else {
358: ip6stat.ip6s_badscope++;
1.9 itojun 359: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2 itojun 360: goto bad;
361: }
362: }
363:
364: if (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) {
365: if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) {
366: ours = 1;
1.9 itojun 367: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 368: goto hbhcheck;
369: }
370: } else {
371: if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src))
372: ip6->ip6_src.s6_addr16[1]
373: = htons(m->m_pkthdr.rcvif->if_index);
374: if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst))
375: ip6->ip6_dst.s6_addr16[1]
376: = htons(m->m_pkthdr.rcvif->if_index);
377: }
378:
1.12 itojun 379: #ifdef PTR
1.9 itojun 380: /*
381: *
382: */
383: if (ip6_protocol_tr)
384: {
385: struct mbuf *m1 = NULL;
386:
387: switch (ptr_in6(m, &m1))
388: {
389: case IPPROTO_IP: goto mcastcheck;
390: case IPPROTO_IPV4: ip_forward(m1, 0); break;
391: case IPPROTO_IPV6: ip6_forward(m1, 0); break;
392: case IPPROTO_MAX: /* discard this packet */
393: default:
394: }
395:
396: if (m != m1)
397: m_freem(m);
398:
399: return;
400: }
401:
402: mcastcheck:
403: #endif
404:
1.2 itojun 405: /*
406: * Multicast check
407: */
408: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
409: struct in6_multi *in6m = 0;
1.9 itojun 410:
411: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2 itojun 412: /*
413: * See if we belong to the destination multicast group on the
414: * arrival interface.
415: */
416: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
417: if (in6m)
418: ours = 1;
419: else if (!ip6_mrouter) {
420: ip6stat.ip6s_notmember++;
421: ip6stat.ip6s_cantforward++;
1.9 itojun 422: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 423: goto bad;
424: }
1.9 itojun 425: deliverifp = m->m_pkthdr.rcvif;
1.2 itojun 426: goto hbhcheck;
427: }
428:
429: /*
430: * Unicast check
431: */
432: if (ip6_forward_rt.ro_rt == 0 ||
433: !IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
434: &ip6_forward_rt.ro_dst.sin6_addr)) {
435: if (ip6_forward_rt.ro_rt) {
436: RTFREE(ip6_forward_rt.ro_rt);
437: ip6_forward_rt.ro_rt = 0;
438: }
439: bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6));
440: ip6_forward_rt.ro_dst.sin6_len = sizeof(struct sockaddr_in6);
441: ip6_forward_rt.ro_dst.sin6_family = AF_INET6;
442: ip6_forward_rt.ro_dst.sin6_addr = ip6->ip6_dst;
443:
1.9 itojun 444: rtalloc((struct route *)&ip6_forward_rt);
1.2 itojun 445: }
446:
447: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
448:
449: /*
450: * Accept the packet if the forwarding interface to the destination
451: * according to the routing table is the loopback interface,
452: * unless the associated route has a gateway.
453: * Note that this approach causes to accept a packet if there is a
454: * route to the loopback interface for the destination of the packet.
455: * But we think it's even useful in some situations, e.g. when using
456: * a special daemon which wants to intercept the packet.
457: */
458: if (ip6_forward_rt.ro_rt &&
459: (ip6_forward_rt.ro_rt->rt_flags &
460: (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
461: #if 0
462: /*
463: * The check below is redundant since the comparison of
464: * the destination and the key of the rtentry has
465: * already done through looking up the routing table.
466: */
467: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
468: &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
469: #endif
1.9 itojun 470: ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2 itojun 471: struct in6_ifaddr *ia6 =
472: (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
473: /* packet to tentative address must not be received */
474: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
475: m->m_flags |= M_ANYCAST6;
476: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
477: /* this interface is ready */
478: ours = 1;
1.9 itojun 479: deliverifp = ia6->ia_ifp; /* correct? */
1.2 itojun 480: goto hbhcheck;
481: } else {
482: /* this interface is not ready, fall through */
483: }
484: }
485:
486: /*
487: * FAITH(Firewall Aided Internet Translator)
488: */
489: #if defined(NFAITH) && 0 < NFAITH
490: if (ip6_keepfaith) {
491: if (ip6_forward_rt.ro_rt && ip6_forward_rt.ro_rt->rt_ifp
492: && ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
493: /* XXX do we need more sanity checks? */
494: ours = 1;
1.9 itojun 495: deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /*faith*/
496: goto hbhcheck;
497: }
498: }
499: #endif
500:
501: #if 0
502: {
503: /*
504: * Last resort: check in6_ifaddr for incoming interface.
505: * The code is here until I update the "goto ours hack" code above
506: * working right.
507: */
508: struct ifaddr *ifa;
509: for (ifa = m->m_pkthdr.rcvif->if_addrlist.tqh_first;
510: ifa;
511: ifa = ifa->ifa_list.tqe_next) {
512: if (ifa->ifa_addr == NULL)
513: continue; /* just for safety */
514: if (ifa->ifa_addr->sa_family != AF_INET6)
515: continue;
516: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
517: ours = 1;
518: deliverifp = ifa->ifa_ifp;
1.2 itojun 519: goto hbhcheck;
520: }
521: }
1.9 itojun 522: }
1.2 itojun 523: #endif
524:
525: /*
526: * Now there is no reason to process the packet if it's not our own
527: * and we're not a router.
528: */
529: if (!ip6_forwarding) {
530: ip6stat.ip6s_cantforward++;
1.9 itojun 531: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2 itojun 532: goto bad;
533: }
534:
535: hbhcheck:
536: /*
537: * Process Hop-by-Hop options header if it's contained.
538: * m may be modified in ip6_hopopts_input().
539: * If a JumboPayload option is included, plen will also be modified.
540: */
541: plen = (u_int32_t)ntohs(ip6->ip6_plen);
542: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 543: struct ip6_hbh *hbh;
544:
545: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
546: #if 0 /*touches NULL pointer*/
547: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
548: #endif
1.2 itojun 549: return; /* m have already been freed */
1.9 itojun 550: }
1.2 itojun 551: /* adjust pointer */
552: ip6 = mtod(m, struct ip6_hdr *);
1.9 itojun 553: #ifndef PULLDOWN_TEST
554: /* ip6_hopopts_input() ensures that mbuf is contiguous */
555: hbh = (struct ip6_hbh *)(ip6 + 1);
556: #else
557: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
558: sizeof(struct ip6_hbh));
559: if (hbh == NULL) {
560: ip6stat.ip6s_tooshort++;
561: return;
562: }
563: #endif
564: nxt = hbh->ip6h_nxt;
1.2 itojun 565:
566: /*
567: * accept the packet if a router alert option is included
568: * and we act as an IPv6 router.
569: */
1.5 itojun 570: if (rtalert != ~0 && ip6_forwarding)
1.2 itojun 571: ours = 1;
572: } else
573: nxt = ip6->ip6_nxt;
574:
575: /*
576: * Check that the amount of data in the buffers
577: * is as at least much as the IPv6 header would have us expect.
578: * Trim mbufs if longer than we expect.
579: * Drop packet if shorter than we expect.
580: */
581: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
582: ip6stat.ip6s_tooshort++;
1.9 itojun 583: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2 itojun 584: goto bad;
585: }
586: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
587: if (m->m_len == m->m_pkthdr.len) {
588: m->m_len = sizeof(struct ip6_hdr) + plen;
589: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
590: } else
591: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
592: }
593:
594: /*
595: * Forward if desirable.
596: */
597: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
598: /*
599: * If we are acting as a multicast router, all
600: * incoming multicast packets are passed to the
601: * kernel-level multicast forwarding function.
602: * The packet is returned (relatively) intact; if
603: * ip6_mforward() returns a non-zero value, the packet
604: * must be discarded, else it may be accepted below.
605: */
606: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
607: ip6stat.ip6s_cantforward++;
608: m_freem(m);
609: return;
610: }
611: if (!ours) {
612: m_freem(m);
613: return;
614: }
615: }
616: else if (!ours) {
617: ip6_forward(m, 0);
618: return;
619: }
620:
621: /*
622: * Tell launch routine the next header
623: */
1.12 itojun 624: #ifdef IFA_STATS
1.9 itojun 625: if (IFA_STATS && deliverifp != NULL) {
626: struct in6_ifaddr *ia6;
627: ip6 = mtod(m, struct ip6_hdr *);
628: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
629: if (ia6)
630: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
631: }
632: #endif
1.2 itojun 633: ip6stat.ip6s_delivered++;
1.9 itojun 634: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2 itojun 635: nest = 0;
636: while (nxt != IPPROTO_DONE) {
637: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
638: ip6stat.ip6s_toomanyhdr++;
639: goto bad;
640: }
1.8 itojun 641:
642: /*
643: * protection against faulty packet - there should be
644: * more sanity checks in header chain processing.
645: */
646: if (m->m_pkthdr.len < off) {
647: ip6stat.ip6s_tooshort++;
1.9 itojun 648: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8 itojun 649: goto bad;
650: }
651:
1.2 itojun 652: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
653: }
654: return;
655: bad:
656: m_freem(m);
657: }
658:
659: /*
660: * Hop-by-Hop options header processing. If a valid jumbo payload option is
661: * included, the real payload length will be stored in plenp.
662: */
663: static int
664: ip6_hopopts_input(plenp, rtalertp, mp, offp)
665: u_int32_t *plenp;
1.5 itojun 666: u_int32_t *rtalertp; /* XXX: should be stored more smart way */
1.2 itojun 667: struct mbuf **mp;
668: int *offp;
669: {
670: register struct mbuf *m = *mp;
671: int off = *offp, hbhlen;
672: struct ip6_hbh *hbh;
673: u_int8_t *opt;
674:
675: /* validation of the length of the header */
1.9 itojun 676: #ifndef PULLDOWN_TEST
1.2 itojun 677: IP6_EXTHDR_CHECK(m, off, sizeof(*hbh), -1);
678: hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off);
679: hbhlen = (hbh->ip6h_len + 1) << 3;
680:
681: IP6_EXTHDR_CHECK(m, off, hbhlen, -1);
682: hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off);
1.9 itojun 683: #else
684: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
685: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
686: if (hbh == NULL) {
687: ip6stat.ip6s_tooshort++;
688: return -1;
689: }
690: hbhlen = (hbh->ip6h_len + 1) << 3;
691: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
692: hbhlen);
693: if (hbh == NULL) {
694: ip6stat.ip6s_tooshort++;
695: return -1;
696: }
697: #endif
1.2 itojun 698: off += hbhlen;
699: hbhlen -= sizeof(struct ip6_hbh);
700: opt = (u_int8_t *)hbh + sizeof(struct ip6_hbh);
701:
702: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
703: hbhlen, rtalertp, plenp) < 0)
704: return(-1);
705:
706: *offp = off;
707: *mp = m;
708: return(0);
709: }
710:
711: /*
712: * Search header for all Hop-by-hop options and process each option.
713: * This function is separate from ip6_hopopts_input() in order to
714: * handle a case where the sending node itself process its hop-by-hop
715: * options header. In such a case, the function is called from ip6_output().
716: */
717: int
718: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
719: struct mbuf *m;
720: u_int8_t *opthead;
721: int hbhlen;
1.5 itojun 722: u_int32_t *rtalertp;
1.2 itojun 723: u_int32_t *plenp;
724: {
725: struct ip6_hdr *ip6;
726: int optlen = 0;
727: u_int8_t *opt = opthead;
728: u_int16_t rtalert_val;
729:
730: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
731: switch(*opt) {
732: case IP6OPT_PAD1:
733: optlen = 1;
734: break;
735: case IP6OPT_PADN:
736: if (hbhlen < IP6OPT_MINLEN) {
737: ip6stat.ip6s_toosmall++;
738: goto bad;
739: }
740: optlen = *(opt + 1) + 2;
741: break;
742: case IP6OPT_RTALERT:
1.8 itojun 743: /* XXX may need check for alignment */
1.2 itojun 744: if (hbhlen < IP6OPT_RTALERT_LEN) {
745: ip6stat.ip6s_toosmall++;
746: goto bad;
747: }
748: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2)
749: /* XXX: should we discard the packet? */
750: log(LOG_ERR, "length of router alert opt is inconsitent(%d)",
751: *(opt + 1));
752: optlen = IP6OPT_RTALERT_LEN;
753: bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
754: *rtalertp = ntohs(rtalert_val);
755: break;
756: case IP6OPT_JUMBO:
1.8 itojun 757: /* XXX may need check for alignment */
1.2 itojun 758: if (hbhlen < IP6OPT_JUMBO_LEN) {
759: ip6stat.ip6s_toosmall++;
760: goto bad;
761: }
762: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2)
763: /* XXX: should we discard the packet? */
764: log(LOG_ERR, "length of jumbopayload opt "
765: "is inconsistent(%d)",
766: *(opt + 1));
767: optlen = IP6OPT_JUMBO_LEN;
768:
769: /*
770: * We can simply cast because of the alignment
771: * requirement of the jumbo payload option.
772: */
1.8 itojun 773: #if 0
1.2 itojun 774: *plenp = ntohl(*(u_int32_t *)(opt + 2));
1.8 itojun 775: #else
776: bcopy(opt + 2, plenp, sizeof(*plenp));
777: *plenp = htonl(*plenp);
778: #endif
1.2 itojun 779: if (*plenp <= IPV6_MAXPACKET) {
780: /*
781: * jumbo payload length must be larger
782: * than 65535
783: */
784: ip6stat.ip6s_badoptions++;
785: icmp6_error(m, ICMP6_PARAM_PROB,
786: ICMP6_PARAMPROB_HEADER,
787: sizeof(struct ip6_hdr) +
788: sizeof(struct ip6_hbh) +
789: opt + 2 - opthead);
790: return(-1);
791: }
792:
793: ip6 = mtod(m, struct ip6_hdr *);
794: if (ip6->ip6_plen) {
795: /*
796: * IPv6 packets that have non 0 payload length
797: * must not contain a jumbo paylod option.
798: */
799: ip6stat.ip6s_badoptions++;
800: icmp6_error(m, ICMP6_PARAM_PROB,
801: ICMP6_PARAMPROB_HEADER,
802: sizeof(struct ip6_hdr) +
803: sizeof(struct ip6_hbh) +
804: opt - opthead);
805: return(-1);
806: }
807: break;
808: default: /* unknown option */
809: if (hbhlen < IP6OPT_MINLEN) {
810: ip6stat.ip6s_toosmall++;
811: goto bad;
812: }
813: if ((optlen = ip6_unknown_opt(opt, m,
814: sizeof(struct ip6_hdr) +
815: sizeof(struct ip6_hbh) +
816: opt - opthead)) == -1)
817: return(-1);
818: optlen += 2;
819: break;
820: }
821: }
822:
823: return(0);
824:
825: bad:
826: m_freem(m);
827: return(-1);
828: }
829:
830: /*
831: * Unknown option processing.
832: * The third argument `off' is the offset from the IPv6 header to the option,
833: * which is necessary if the IPv6 header the and option header and IPv6 header
834: * is not continuous in order to return an ICMPv6 error.
835: */
836: int
837: ip6_unknown_opt(optp, m, off)
838: u_int8_t *optp;
839: struct mbuf *m;
840: int off;
841: {
842: struct ip6_hdr *ip6;
843:
844: switch(IP6OPT_TYPE(*optp)) {
845: case IP6OPT_TYPE_SKIP: /* ignore the option */
846: return((int)*(optp + 1));
847: case IP6OPT_TYPE_DISCARD: /* silently discard */
848: m_freem(m);
849: return(-1);
850: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
851: ip6stat.ip6s_badoptions++;
852: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
853: return(-1);
854: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
855: ip6stat.ip6s_badoptions++;
856: ip6 = mtod(m, struct ip6_hdr *);
857: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
858: (m->m_flags & (M_BCAST|M_MCAST)))
859: m_freem(m);
860: else
861: icmp6_error(m, ICMP6_PARAM_PROB,
862: ICMP6_PARAMPROB_OPTION, off);
863: return(-1);
864: }
865:
866: m_freem(m); /* XXX: NOTREACHED */
867: return(-1);
868: }
869:
870: /*
1.9 itojun 871: * Create the "control" list for this pcb.
872: *
873: * The routine will be called from upper layer handlers like tcp6_input().
874: * Thus the routine assumes that the caller (tcp6_input) have already
875: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
876: * very first mbuf on the mbuf chain.
877: * We may want to add some infinite loop prevention or sanity checks for safety.
878: * (This applies only when you are using KAME mbuf chain restriction, i.e.
879: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2 itojun 880: */
881: void
882: ip6_savecontrol(in6p, mp, ip6, m)
883: register struct in6pcb *in6p;
884: register struct mbuf **mp;
885: register struct ip6_hdr *ip6;
886: register struct mbuf *m;
887: {
888: struct proc *p = curproc; /* XXX */
1.9 itojun 889: int privileged;
1.2 itojun 890:
1.9 itojun 891: privileged = 0;
892: if (p && !suser(p->p_ucred, &p->p_acflag))
893: privileged++;
894:
895: #ifdef SO_TIMESTAMP
1.2 itojun 896: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
897: struct timeval tv;
898:
899: microtime(&tv);
900: *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
901: SCM_TIMESTAMP, SOL_SOCKET);
902: if (*mp)
903: mp = &(*mp)->m_next;
904: }
1.9 itojun 905: #endif
1.2 itojun 906: if (in6p->in6p_flags & IN6P_RECVDSTADDR) {
907: *mp = sbcreatecontrol((caddr_t) &ip6->ip6_dst,
908: sizeof(struct in6_addr), IPV6_RECVDSTADDR,
909: IPPROTO_IPV6);
910: if (*mp)
911: mp = &(*mp)->m_next;
912: }
913:
914: #ifdef noyet
915: /* options were tossed above */
916: if (in6p->in6p_flags & IN6P_RECVOPTS)
917: /* broken */
918: /* ip6_srcroute doesn't do what we want here, need to fix */
919: if (in6p->in6p_flags & IPV6P_RECVRETOPTS)
920: /* broken */
921: #endif
922:
923: /* RFC 2292 sec. 5 */
924: if (in6p->in6p_flags & IN6P_PKTINFO) {
925: struct in6_pktinfo pi6;
926: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
927: if (IN6_IS_SCOPE_LINKLOCAL(&pi6.ipi6_addr))
928: pi6.ipi6_addr.s6_addr16[1] = 0;
929: pi6.ipi6_ifindex = (m && m->m_pkthdr.rcvif)
930: ? m->m_pkthdr.rcvif->if_index
931: : 0;
932: *mp = sbcreatecontrol((caddr_t) &pi6,
933: sizeof(struct in6_pktinfo), IPV6_PKTINFO,
934: IPPROTO_IPV6);
935: if (*mp)
936: mp = &(*mp)->m_next;
937: }
938: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
939: int hlim = ip6->ip6_hlim & 0xff;
940: *mp = sbcreatecontrol((caddr_t) &hlim,
941: sizeof(int), IPV6_HOPLIMIT, IPPROTO_IPV6);
942: if (*mp)
943: mp = &(*mp)->m_next;
944: }
945: /* IN6P_NEXTHOP - for outgoing packet only */
946:
947: /*
948: * IPV6_HOPOPTS socket option. We require super-user privilege
949: * for the option, but it might be too strict, since there might
950: * be some hop-by-hop options which can be returned to normal user.
951: * See RFC 2292 section 6.
952: */
1.9 itojun 953: if ((in6p->in6p_flags & IN6P_HOPOPTS) && privileged) {
1.2 itojun 954: /*
955: * Check if a hop-by-hop options header is contatined in the
956: * received packet, and if so, store the options as ancillary
957: * data. Note that a hop-by-hop options header must be
958: * just after the IPv6 header, which fact is assured through
959: * the IPv6 input processing.
960: */
961: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
962: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9 itojun 963: struct ip6_hbh *hbh;
964: int hbhlen;
965:
966: #ifndef PULLDOWN_TEST
967: hbh = (struct ip6_hbh *)(ip6 + 1);
968: hbhlen = (hbh->ip6h_len + 1) << 3;
969: #else
970: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
971: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
972: if (hbh == NULL) {
973: ip6stat.ip6s_tooshort++;
974: return;
975: }
976: hbhlen = (hbh->ip6h_len + 1) << 3;
977: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
978: sizeof(struct ip6_hdr), hbhlen);
979: if (hbh == NULL) {
980: ip6stat.ip6s_tooshort++;
981: return;
982: }
983: #endif
1.2 itojun 984:
985: /*
986: * XXX: We copy whole the header even if a jumbo
987: * payload option is included, which option is to
988: * be removed before returning in the RFC 2292.
989: * But it's too painful operation...
990: */
1.9 itojun 991: *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
1.2 itojun 992: IPV6_HOPOPTS, IPPROTO_IPV6);
993: if (*mp)
994: mp = &(*mp)->m_next;
995: }
996: }
997:
998: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
999: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1000: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1001: int nxt = ip6->ip6_nxt, off = sizeof(struct ip6_hdr);;
1002:
1003: /*
1004: * Search for destination options headers or routing
1005: * header(s) through the header chain, and stores each
1006: * header as ancillary data.
1007: * Note that the order of the headers remains in
1008: * the chain of ancillary data.
1009: */
1010: while(1) { /* is explicit loop prevention necessary? */
1.9 itojun 1011: struct ip6_ext *ip6e;
1012: int elen;
1013:
1014: #ifndef PULLDOWN_TEST
1015: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + off);
1016: if (nxt == IPPROTO_AH)
1017: elen = (ip6e->ip6e_len + 2) << 2;
1018: else
1019: elen = (ip6e->ip6e_len + 1) << 3;
1020: #else
1021: IP6_EXTHDR_GET(ip6e, struct ip6_ext *, m, off,
1022: sizeof(struct ip6_ext));
1023: if (ip6e == NULL) {
1024: ip6stat.ip6s_tooshort++;
1025: return;
1026: }
1027: if (nxt == IPPROTO_AH)
1028: elen = (ip6e->ip6e_len + 2) << 2;
1029: else
1030: elen = (ip6e->ip6e_len + 1) << 3;
1031: IP6_EXTHDR_GET(ip6e, struct ip6_ext *, m, off, elen);
1032: if (ip6e == NULL) {
1033: ip6stat.ip6s_tooshort++;
1034: return;
1035: }
1036: #endif
1.2 itojun 1037:
1038: switch(nxt) {
1039: case IPPROTO_DSTOPTS:
1040: if (!in6p->in6p_flags & IN6P_DSTOPTS)
1041: break;
1042:
1043: /*
1044: * We also require super-user privilege for
1045: * the option.
1046: * See the comments on IN6_HOPOPTS.
1047: */
1.9 itojun 1048: if (!privileged)
1.2 itojun 1049: break;
1050:
1.9 itojun 1051: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.2 itojun 1052: IPV6_DSTOPTS,
1053: IPPROTO_IPV6);
1054: if (*mp)
1055: mp = &(*mp)->m_next;
1056: break;
1057:
1058: case IPPROTO_ROUTING:
1059: if (!in6p->in6p_flags & IN6P_RTHDR)
1060: break;
1061:
1.9 itojun 1062: *mp = sbcreatecontrol((caddr_t)ip6e, elen,
1.2 itojun 1063: IPV6_RTHDR,
1064: IPPROTO_IPV6);
1065: if (*mp)
1066: mp = &(*mp)->m_next;
1067: break;
1068:
1069: case IPPROTO_UDP:
1070: case IPPROTO_TCP:
1071: case IPPROTO_ICMPV6:
1072: default:
1073: /*
1074: * stop search if we encounter an upper
1075: * layer protocol headers.
1076: */
1077: goto loopend;
1078:
1079: case IPPROTO_HOPOPTS:
1080: case IPPROTO_AH: /* is it possible? */
1081: break;
1082: }
1083:
1084: /* proceed with the next header. */
1.9 itojun 1085: off += elen;
1.2 itojun 1086: nxt = ip6e->ip6e_nxt;
1087: }
1088: loopend:
1089: }
1.9 itojun 1090: if ((in6p->in6p_flags & IN6P_HOPOPTS) && privileged) {
1.2 itojun 1091: /* to be done */
1092: }
1.9 itojun 1093: if ((in6p->in6p_flags & IN6P_DSTOPTS) && privileged) {
1.2 itojun 1094: /* to be done */
1095: }
1096: /* IN6P_RTHDR - to be done */
1097:
1098: }
1099:
1100: /*
1101: * Get pointer to the previous header followed by the header
1102: * currently processed.
1103: * XXX: This function supposes that
1104: * M includes all headers,
1105: * the next header field and the header length field of each header
1106: * are valid, and
1107: * the sum of each header length equals to OFF.
1108: * Because of these assumptions, this function must be called very
1109: * carefully. Moreover, it will not be used in the near future when
1110: * we develop `neater' mechanism to process extension headers.
1111: */
1112: char *
1113: ip6_get_prevhdr(m, off)
1114: struct mbuf *m;
1115: int off;
1116: {
1117: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1118:
1119: if (off == sizeof(struct ip6_hdr))
1120: return(&ip6->ip6_nxt);
1121: else {
1122: int len, nxt;
1123: struct ip6_ext *ip6e = NULL;
1124:
1125: nxt = ip6->ip6_nxt;
1126: len = sizeof(struct ip6_hdr);
1127: while (len < off) {
1128: ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
1129:
1130: switch(nxt) {
1131: case IPPROTO_FRAGMENT:
1132: len += sizeof(struct ip6_frag);
1133: break;
1134: case IPPROTO_AH:
1135: len += (ip6e->ip6e_len + 2) << 2;
1136: break;
1137: default:
1138: len += (ip6e->ip6e_len + 1) << 3;
1139: break;
1140: }
1141: nxt = ip6e->ip6e_nxt;
1142: }
1143: if (ip6e)
1144: return(&ip6e->ip6e_nxt);
1145: else
1146: return NULL;
1147: }
1148: }
1149:
1150: /*
1151: * System control for IP6
1152: */
1153:
1154: u_char inet6ctlerrmap[PRC_NCMDS] = {
1155: 0, 0, 0, 0,
1156: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
1157: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
1158: EMSGSIZE, EHOSTUNREACH, 0, 0,
1159: 0, 0, 0, 0,
1160: ENOPROTOOPT
1161: };
1162:
1163: #include <vm/vm.h>
1164: #include <sys/sysctl.h>
1165:
1166: int
1167: ip6_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
1168: int *name;
1169: u_int namelen;
1170: void *oldp;
1171: size_t *oldlenp;
1172: void *newp;
1173: size_t newlen;
1174: {
1175: /* All sysctl names at this level are terminal. */
1176: if (namelen != 1)
1177: return ENOTDIR;
1178:
1179: switch (name[0]) {
1180:
1181: case IPV6CTL_FORWARDING:
1182: return sysctl_int(oldp, oldlenp, newp, newlen,
1183: &ip6_forwarding);
1184: case IPV6CTL_SENDREDIRECTS:
1185: return sysctl_int(oldp, oldlenp, newp, newlen,
1186: &ip6_sendredirects);
1187: case IPV6CTL_DEFHLIM:
1188: return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_defhlim);
1189: case IPV6CTL_MAXFRAGPACKETS:
1190: return sysctl_int(oldp, oldlenp, newp, newlen,
1191: &ip6_maxfragpackets);
1192: case IPV6CTL_ACCEPT_RTADV:
1193: return sysctl_int(oldp, oldlenp, newp, newlen,
1194: &ip6_accept_rtadv);
1195: case IPV6CTL_KEEPFAITH:
1196: return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_keepfaith);
1197: case IPV6CTL_LOG_INTERVAL:
1198: return sysctl_int(oldp, oldlenp, newp, newlen,
1199: &ip6_log_interval);
1200: case IPV6CTL_HDRNESTLIMIT:
1201: return sysctl_int(oldp, oldlenp, newp, newlen,
1202: &ip6_hdrnestlimit);
1203: case IPV6CTL_DAD_COUNT:
1204: return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_dad_count);
1205: case IPV6CTL_AUTO_FLOWLABEL:
1206: return sysctl_int(oldp, oldlenp, newp, newlen,
1207: &ip6_auto_flowlabel);
1208: case IPV6CTL_DEFMCASTHLIM:
1209: return sysctl_int(oldp, oldlenp, newp, newlen,
1210: &ip6_defmcasthlim);
1211: case IPV6CTL_GIF_HLIM:
1212: return sysctl_int(oldp, oldlenp, newp, newlen,
1213: &ip6_gif_hlim);
1214: case IPV6CTL_KAME_VERSION:
1215: return sysctl_rdstring(oldp, oldlenp, newp, __KAME_VERSION);
1.9 itojun 1216: case IPV6CTL_USE_DEPRECATED:
1217: return sysctl_int(oldp, oldlenp, newp, newlen,
1218: &ip6_use_deprecated);
1.10 itojun 1219: case IPV6CTL_RR_PRUNE:
1220: return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_rr_prune);
1.12 itojun 1221: #ifndef INET6_BINDV6ONLY
1.11 itojun 1222: case IPV6CTL_BINDV6ONLY:
1223: return sysctl_int(oldp, oldlenp, newp, newlen,
1224: &ip6_bindv6only);
1225: #endif
1.2 itojun 1226: default:
1227: return EOPNOTSUPP;
1228: }
1229: /* NOTREACHED */
1230: }
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