Annotation of src/sys/netinet6/raw_ip6.c, Revision 1.164
1.164 ! maxv 1: /* $NetBSD: raw_ip6.c,v 1.163 2018/02/26 09:04:29 maxv Exp $ */
1.34 itojun 2: /* $KAME: raw_ip6.c,v 1.82 2001/07/23 18:57:56 jinmei Exp $ */
1.3 thorpej 3:
1.2 itojun 4: /*
5: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6: * All rights reserved.
1.24 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.
1.24 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.
1.55 agc 45: * 3. Neither the name of the University nor the names of its contributors
1.2 itojun 46: * may be used to endorse or promote products derived from this software
47: * without specific prior written permission.
48: *
49: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59: * SUCH DAMAGE.
60: *
61: * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
62: */
1.39 lukem 63:
64: #include <sys/cdefs.h>
1.164 ! maxv 65: __KERNEL_RCSID(0, "$NetBSD: raw_ip6.c,v 1.163 2018/02/26 09:04:29 maxv Exp $");
1.6 thorpej 66:
1.141 pooka 67: #ifdef _KERNEL_OPT
1.6 thorpej 68: #include "opt_ipsec.h"
1.153 knakahar 69: #include "opt_net_mpsafe.h"
1.141 pooka 70: #endif
1.2 itojun 71:
72: #include <sys/param.h>
1.69 atatat 73: #include <sys/sysctl.h>
1.2 itojun 74: #include <sys/mbuf.h>
75: #include <sys/socket.h>
76: #include <sys/protosw.h>
77: #include <sys/socketvar.h>
78: #include <sys/systm.h>
79: #include <sys/proc.h>
1.77 elad 80: #include <sys/kauth.h>
1.116 rmind 81: #include <sys/kmem.h>
1.2 itojun 82:
83: #include <net/if.h>
84: #include <net/if_types.h>
1.97 thorpej 85: #include <net/net_stats.h>
1.2 itojun 86:
87: #include <netinet/in.h>
88: #include <netinet/in_var.h>
1.19 itojun 89: #include <netinet/ip6.h>
1.2 itojun 90: #include <netinet6/ip6_var.h>
1.94 thorpej 91: #include <netinet6/ip6_private.h>
1.2 itojun 92: #include <netinet6/ip6_mroute.h>
1.19 itojun 93: #include <netinet/icmp6.h>
1.94 thorpej 94: #include <netinet6/icmp6_private.h>
1.2 itojun 95: #include <netinet6/in6_pcb.h>
1.20 itojun 96: #include <netinet6/ip6protosw.h>
1.24 itojun 97: #include <netinet6/scope6_var.h>
1.37 itojun 98: #include <netinet6/raw_ip6.h>
1.2 itojun 99:
1.111 christos 100: #ifdef IPSEC
1.81 degroote 101: #include <netipsec/ipsec.h>
1.97 thorpej 102: #include <netipsec/ipsec_var.h>
103: #include <netipsec/ipsec_private.h>
1.81 degroote 104: #include <netipsec/ipsec6.h>
105: #endif
106:
1.2 itojun 107: #include "faith.h"
1.32 itojun 108: #if defined(NFAITH) && 0 < NFAITH
109: #include <net/if_faith.h>
110: #endif
1.2 itojun 111:
1.59 itojun 112: extern struct inpcbtable rawcbtable;
113: struct inpcbtable raw6cbtable;
1.2 itojun 114: #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
115:
116: /*
117: * Raw interface to IP6 protocol.
118: */
119:
1.95 thorpej 120: static percpu_t *rip6stat_percpu;
121:
1.97 thorpej 122: #define RIP6_STATINC(x) _NET_STATINC(rip6stat_percpu, x)
1.37 itojun 123:
1.105 pooka 124: static void sysctl_net_inet6_raw6_setup(struct sysctllog **);
125:
1.2 itojun 126: /*
127: * Initialize raw connection block queue.
128: */
129: void
1.103 cegger 130: rip6_init(void)
1.2 itojun 131: {
1.47 itojun 132:
1.105 pooka 133: sysctl_net_inet6_raw6_setup(NULL);
1.59 itojun 134: in6_pcbinit(&raw6cbtable, 1, 1);
1.95 thorpej 135:
136: rip6stat_percpu = percpu_alloc(sizeof(uint64_t) * RIP6_NSTATS);
1.2 itojun 137: }
138:
139: /*
140: * Setup generic address and protocol structures
141: * for raw_input routine, then pass them along with
142: * mbuf chain.
143: */
144: int
1.85 christos 145: rip6_input(struct mbuf **mp, int *offp, int proto)
1.2 itojun 146: {
147: struct mbuf *m = *mp;
1.27 itojun 148: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1.59 itojun 149: struct inpcb_hdr *inph;
1.27 itojun 150: struct in6pcb *in6p;
1.2 itojun 151: struct in6pcb *last = NULL;
152: struct sockaddr_in6 rip6src;
153: struct mbuf *opts = NULL;
154:
1.95 thorpej 155: RIP6_STATINC(RIP6_STAT_IPACKETS);
1.37 itojun 156:
1.2 itojun 157: #if defined(NFAITH) && 0 < NFAITH
1.32 itojun 158: if (faithprefix(&ip6->ip6_dst)) {
159: /* send icmp6 host unreach? */
160: m_freem(m);
161: return IPPROTO_DONE;
1.2 itojun 162: }
163: #endif
1.14 itojun 164:
1.89 dyoung 165: sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0);
1.75 rpaulo 166: if (sa6_recoverscope(&rip6src) != 0) {
167: /* XXX: should be impossible. */
168: m_freem(m);
169: return IPPROTO_DONE;
170: }
1.2 itojun 171:
1.112 christos 172: TAILQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) {
1.59 itojun 173: in6p = (struct in6pcb *)inph;
174: if (in6p->in6p_af != AF_INET6)
175: continue;
1.2 itojun 176: if (in6p->in6p_ip6.ip6_nxt &&
177: in6p->in6p_ip6.ip6_nxt != proto)
178: continue;
1.12 itojun 179: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
1.37 itojun 180: !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
1.2 itojun 181: continue;
1.12 itojun 182: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
1.37 itojun 183: !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
1.2 itojun 184: continue;
1.37 itojun 185: if (in6p->in6p_cksum != -1) {
1.95 thorpej 186: RIP6_STATINC(RIP6_STAT_ISUM);
1.64 itojun 187: if (in6_cksum(m, proto, *offp,
1.37 itojun 188: m->m_pkthdr.len - *offp)) {
1.95 thorpej 189: RIP6_STATINC(RIP6_STAT_BADSUM);
1.37 itojun 190: continue;
191: }
1.2 itojun 192: }
193: if (last) {
194: struct mbuf *n;
1.30 itojun 195:
1.111 christos 196: #ifdef IPSEC
1.81 degroote 197: /*
198: * Check AH/ESP integrity
199: */
1.164 ! maxv 200: if (!ipsec_used || !ipsec_in_reject(m, last))
1.159 maxv 201: #endif
1.2 itojun 202: if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
203: if (last->in6p_flags & IN6P_CONTROLOPTS)
204: ip6_savecontrol(last, &opts, ip6, n);
205: /* strip intermediate headers */
206: m_adj(n, *offp);
207: if (sbappendaddr(&last->in6p_socket->so_rcv,
1.148 ozaki-r 208: sin6tosa(&rip6src), n, opts) == 0) {
1.2 itojun 209: /* should notify about lost packet */
210: m_freem(n);
211: if (opts)
212: m_freem(opts);
1.95 thorpej 213: RIP6_STATINC(RIP6_STAT_FULLSOCK);
1.2 itojun 214: } else
215: sorwakeup(last->in6p_socket);
216: opts = NULL;
217: }
218: }
219: last = in6p;
220: }
1.159 maxv 221:
1.111 christos 222: #ifdef IPSEC
1.163 maxv 223: if (ipsec_used && last && ipsec_in_reject(m, last)) {
1.81 degroote 224: m_freem(m);
1.159 maxv 225: IP6_STATDEC(IP6_STAT_DELIVERED);
226: /* do not inject data into pcb */
227: } else
228: #endif
1.2 itojun 229: if (last) {
230: if (last->in6p_flags & IN6P_CONTROLOPTS)
231: ip6_savecontrol(last, &opts, ip6, m);
232: /* strip intermediate headers */
233: m_adj(m, *offp);
234: if (sbappendaddr(&last->in6p_socket->so_rcv,
1.148 ozaki-r 235: sin6tosa(&rip6src), m, opts) == 0) {
1.2 itojun 236: m_freem(m);
237: if (opts)
238: m_freem(opts);
1.95 thorpej 239: RIP6_STATINC(RIP6_STAT_FULLSOCK);
1.2 itojun 240: } else
241: sorwakeup(last->in6p_socket);
242: } else {
1.95 thorpej 243: RIP6_STATINC(RIP6_STAT_NOSOCK);
1.37 itojun 244: if (m->m_flags & M_MCAST)
1.95 thorpej 245: RIP6_STATINC(RIP6_STAT_NOSOCKMCAST);
1.2 itojun 246: if (proto == IPPROTO_NONE)
247: m_freem(m);
248: else {
1.144 ozaki-r 249: int s;
250: struct ifnet *rcvif = m_get_rcvif(m, &s);
1.160 maxv 251: const int prvnxt = ip6_get_prevhdr(m, *offp);
1.144 ozaki-r 252: in6_ifstat_inc(rcvif, ifs6_in_protounknown);
253: m_put_rcvif(rcvif, &s);
1.2 itojun 254: icmp6_error(m, ICMP6_PARAM_PROB,
1.43 itojun 255: ICMP6_PARAMPROB_NEXTHEADER,
1.160 maxv 256: prvnxt);
1.2 itojun 257: }
1.94 thorpej 258: IP6_STATDEC(IP6_STAT_DELIVERED);
1.2 itojun 259: }
260: return IPPROTO_DONE;
261: }
262:
1.98 ad 263: void *
1.82 dyoung 264: rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d)
1.20 itojun 265: {
1.27 itojun 266: struct ip6_hdr *ip6;
1.29 itojun 267: struct ip6ctlparam *ip6cp = NULL;
268: const struct sockaddr_in6 *sa6_src = NULL;
269: void *cmdarg;
1.88 dyoung 270: void (*notify)(struct in6pcb *, int) = in6_rtchange;
1.29 itojun 271: int nxt;
1.20 itojun 272:
273: if (sa->sa_family != AF_INET6 ||
274: sa->sa_len != sizeof(struct sockaddr_in6))
1.102 yamt 275: return NULL;
1.20 itojun 276:
1.21 itojun 277: if ((unsigned)cmd >= PRC_NCMDS)
1.102 yamt 278: return NULL;
1.21 itojun 279: if (PRC_IS_REDIRECT(cmd))
280: notify = in6_rtchange, d = NULL;
281: else if (cmd == PRC_HOSTDEAD)
282: d = NULL;
1.29 itojun 283: else if (cmd == PRC_MSGSIZE)
284: ; /* special code is present, see below */
1.21 itojun 285: else if (inet6ctlerrmap[cmd] == 0)
1.102 yamt 286: return NULL;
1.20 itojun 287:
288: /* if the parameter is from icmp6, decode it. */
289: if (d != NULL) {
1.29 itojun 290: ip6cp = (struct ip6ctlparam *)d;
1.20 itojun 291: ip6 = ip6cp->ip6c_ip6;
1.29 itojun 292: cmdarg = ip6cp->ip6c_cmdarg;
293: sa6_src = ip6cp->ip6c_src;
294: nxt = ip6cp->ip6c_nxt;
1.20 itojun 295: } else {
296: ip6 = NULL;
1.29 itojun 297: cmdarg = NULL;
298: sa6_src = &sa6_any;
299: nxt = -1;
1.20 itojun 300: }
301:
1.29 itojun 302: if (ip6 && cmd == PRC_MSGSIZE) {
1.82 dyoung 303: const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa;
1.29 itojun 304: int valid = 0;
305: struct in6pcb *in6p;
1.20 itojun 306:
307: /*
1.29 itojun 308: * Check to see if we have a valid raw IPv6 socket
309: * corresponding to the address in the ICMPv6 message
310: * payload, and the protocol (ip6_nxt) meets the socket.
311: * XXX chase extension headers, or pass final nxt value
312: * from icmp6_notify_error()
1.20 itojun 313: */
1.29 itojun 314: in6p = NULL;
1.59 itojun 315: in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0,
1.108 dyoung 316: (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0, 0);
1.29 itojun 317: #if 0
318: if (!in6p) {
319: /*
320: * As the use of sendto(2) is fairly popular,
321: * we may want to allow non-connected pcb too.
322: * But it could be too weak against attacks...
323: * We should at least check if the local
324: * address (= s) is really ours.
325: */
1.59 itojun 326: in6p = in6_pcblookup_bind(&raw6cbtable,
1.75 rpaulo 327: &sa6->sin6_addr, 0, 0);
1.29 itojun 328: }
329: #endif
330:
331: if (in6p && in6p->in6p_ip6.ip6_nxt &&
332: in6p->in6p_ip6.ip6_nxt == nxt)
333: valid++;
1.20 itojun 334:
1.29 itojun 335: /*
336: * Depending on the value of "valid" and routing table
337: * size (mtudisc_{hi,lo}wat), we will:
1.44 itojun 338: * - recalculate the new MTU and create the
1.29 itojun 339: * corresponding routing entry, or
340: * - ignore the MTU change notification.
341: */
342: icmp6_mtudisc_update((struct ip6ctlparam *)d, valid);
1.20 itojun 343:
1.29 itojun 344: /*
345: * regardless of if we called icmp6_mtudisc_update(),
1.76 rpaulo 346: * we need to call in6_pcbnotify(), to notify path MTU
347: * change to the userland (RFC3542), because some
348: * unconnected sockets may share the same destination
349: * and want to know the path MTU.
1.29 itojun 350: */
1.20 itojun 351: }
1.29 itojun 352:
1.59 itojun 353: (void) in6_pcbnotify(&raw6cbtable, sa, 0,
1.148 ozaki-r 354: sin6tocsa(sa6_src), 0, cmd, cmdarg, notify);
1.98 ad 355: return NULL;
1.20 itojun 356: }
357:
1.2 itojun 358: /*
359: * Generate IPv6 header and pass packet to ip6_output.
360: * Tack on options user may have setup with control call.
361: */
362: int
1.106 dyoung 363: rip6_output(struct mbuf *m, struct socket * const so,
364: struct sockaddr_in6 * const dstsock, struct mbuf * const control)
1.2 itojun 365: {
366: struct in6_addr *dst;
367: struct ip6_hdr *ip6;
368: struct in6pcb *in6p;
369: u_int plen = m->m_pkthdr.len;
370: int error = 0;
1.75 rpaulo 371: struct ip6_pktopts opt, *optp = NULL;
1.2 itojun 372: struct ifnet *oifp = NULL;
1.12 itojun 373: int type, code; /* for ICMPv6 output statistics only */
1.75 rpaulo 374: int scope_ambiguous = 0;
1.145 ozaki-r 375: int bound = curlwp_bind();
1.146 ozaki-r 376: struct psref psref;
1.2 itojun 377:
378: in6p = sotoin6pcb(so);
379:
380: dst = &dstsock->sin6_addr;
381: if (control) {
1.76 rpaulo 382: if ((error = ip6_setpktopts(control, &opt,
383: in6p->in6p_outputopts,
1.104 elad 384: kauth_cred_get(), so->so_proto->pr_protocol)) != 0) {
1.2 itojun 385: goto bad;
1.76 rpaulo 386: }
1.2 itojun 387: optp = &opt;
388: } else
389: optp = in6p->in6p_outputopts;
390:
1.12 itojun 391: /*
1.75 rpaulo 392: * Check and convert scope zone ID into internal form.
393: * XXX: we may still need to determine the zone later.
394: */
395: if (!(so->so_state & SS_ISCONNECTED)) {
396: if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone)
397: scope_ambiguous = 1;
398: if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0)
399: goto bad;
400: }
401:
402: /*
1.12 itojun 403: * For an ICMPv6 packet, we should know its type and code
404: * to update statistics.
405: */
406: if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
407: struct icmp6_hdr *icmp6;
408: if (m->m_len < sizeof(struct icmp6_hdr) &&
409: (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
410: error = ENOBUFS;
411: goto bad;
412: }
413: icmp6 = mtod(m, struct icmp6_hdr *);
414: type = icmp6->icmp6_type;
415: code = icmp6->icmp6_code;
1.62 christos 416: } else {
417: type = 0;
418: code = 0;
1.12 itojun 419: }
420:
1.52 itojun 421: M_PREPEND(m, sizeof(*ip6), M_DONTWAIT);
422: if (!m) {
423: error = ENOBUFS;
424: goto bad;
425: }
1.2 itojun 426: ip6 = mtod(m, struct ip6_hdr *);
427:
428: /*
429: * Next header might not be ICMP6 but use its pseudo header anyway.
430: */
431: ip6->ip6_dst = *dst;
432:
1.12 itojun 433: /*
434: * Source address selection.
435: */
1.152 ozaki-r 436: error = in6_selectsrc(dstsock, optp, in6p->in6p_moptions,
437: &in6p->in6p_route, &in6p->in6p_laddr, &oifp, &psref, &ip6->ip6_src);
438: if (error != 0)
1.75 rpaulo 439: goto bad;
1.2 itojun 440:
1.75 rpaulo 441: if (oifp && scope_ambiguous) {
442: /*
443: * Application should provide a proper zone ID or the use of
444: * default zone IDs should be enabled. Unfortunately, some
445: * applications do not behave as it should, so we need a
446: * workaround. Even if an appropriate ID is not determined
447: * (when it's required), if we can determine the outgoing
448: * interface. determine the zone ID based on the interface.
449: */
450: error = in6_setscope(&dstsock->sin6_addr, oifp, NULL);
451: if (error != 0)
1.2 itojun 452: goto bad;
1.12 itojun 453: }
1.75 rpaulo 454: ip6->ip6_dst = dstsock->sin6_addr;
1.2 itojun 455:
1.75 rpaulo 456: /* fill in the rest of the IPv6 header fields */
1.2 itojun 457: ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK;
1.20 itojun 458: ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
459: ip6->ip6_vfc |= IPV6_VERSION;
1.75 rpaulo 460: /* ip6_plen will be filled in ip6_output, so not fill it here. */
1.2 itojun 461: ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt;
1.12 itojun 462: ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
1.2 itojun 463:
1.146 ozaki-r 464: if_put(oifp, &psref);
465: oifp = NULL;
466:
1.2 itojun 467: if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
468: in6p->in6p_cksum != -1) {
1.161 maxv 469: const uint8_t nxt = ip6->ip6_nxt;
1.2 itojun 470: int off;
1.67 yamt 471: u_int16_t sum;
1.2 itojun 472:
473: /* compute checksum */
474: if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
475: off = offsetof(struct icmp6_hdr, icmp6_cksum);
476: else
477: off = in6p->in6p_cksum;
478: if (plen < off + 1) {
479: error = EINVAL;
480: goto bad;
481: }
482: off += sizeof(struct ip6_hdr);
483:
1.68 yamt 484: sum = 0;
1.84 christos 485: m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum,
1.68 yamt 486: M_DONTWAIT);
487: if (m == NULL) {
1.66 yamt 488: error = ENOBUFS;
489: goto bad;
490: }
1.161 maxv 491: sum = in6_cksum(m, nxt, sizeof(*ip6), plen);
1.84 christos 492: m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum,
1.68 yamt 493: M_DONTWAIT);
494: if (m == NULL) {
495: error = ENOBUFS;
496: goto bad;
497: }
1.2 itojun 498: }
1.27 itojun 499:
1.144 ozaki-r 500: {
501: struct ifnet *ret_oifp = NULL;
502:
503: error = ip6_output(m, optp, &in6p->in6p_route, 0,
1.156 ozaki-r 504: in6p->in6p_moptions, in6p, &ret_oifp);
1.144 ozaki-r 505: if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
506: if (ret_oifp)
507: icmp6_ifoutstat_inc(ret_oifp, type, code);
508: ICMP6_STATINC(ICMP6_STAT_OUTHIST + type);
509: } else
510: RIP6_STATINC(RIP6_STAT_OPACKETS);
511: }
1.2 itojun 512:
513: goto freectl;
514:
515: bad:
516: if (m)
517: m_freem(m);
518:
519: freectl:
1.76 rpaulo 520: if (control) {
521: ip6_clearpktopts(&opt, -1);
1.2 itojun 522: m_freem(control);
1.76 rpaulo 523: }
1.146 ozaki-r 524: if_put(oifp, &psref);
1.145 ozaki-r 525: curlwp_bindx(bound);
1.83 dyoung 526: return error;
1.2 itojun 527: }
528:
1.40 itojun 529: /*
1.2 itojun 530: * Raw IPv6 socket option processing.
1.40 itojun 531: */
1.2 itojun 532: int
1.100 plunky 533: rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt)
1.2 itojun 534: {
535: int error = 0;
536:
1.100 plunky 537: if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) {
538: int optval;
539:
1.87 dyoung 540: /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */
1.90 dyoung 541: if (op == PRCO_GETOPT) {
1.100 plunky 542: optval = 1;
543: error = sockopt_set(sopt, &optval, sizeof(optval));
544: } else if (op == PRCO_SETOPT) {
545: error = sockopt_getint(sopt, &optval);
546: if (error)
547: goto out;
548: if (optval == 0)
549: error = EINVAL;
550: }
551:
552: goto out;
553: } else if (sopt->sopt_level != IPPROTO_IPV6)
554: return ip6_ctloutput(op, so, sopt);
1.87 dyoung 555:
1.100 plunky 556: switch (sopt->sopt_name) {
1.87 dyoung 557: case MRT6_INIT:
558: case MRT6_DONE:
559: case MRT6_ADD_MIF:
560: case MRT6_DEL_MIF:
561: case MRT6_ADD_MFC:
562: case MRT6_DEL_MFC:
563: case MRT6_PIM:
564: if (op == PRCO_SETOPT)
1.100 plunky 565: error = ip6_mrouter_set(so, sopt);
1.87 dyoung 566: else if (op == PRCO_GETOPT)
1.100 plunky 567: error = ip6_mrouter_get(so, sopt);
1.87 dyoung 568: else
569: error = EINVAL;
570: break;
571: case IPV6_CHECKSUM:
1.100 plunky 572: return ip6_raw_ctloutput(op, so, sopt);
1.27 itojun 573: default:
1.100 plunky 574: return ip6_ctloutput(op, so, sopt);
1.2 itojun 575: }
1.100 plunky 576: out:
1.87 dyoung 577: return error;
1.2 itojun 578: }
579:
580: extern u_long rip6_sendspace;
581: extern u_long rip6_recvspace;
582:
583: int
1.116 rmind 584: rip6_attach(struct socket *so, int proto)
585: {
586: struct in6pcb *in6p;
587: int s, error;
588:
589: KASSERT(sotoin6pcb(so) == NULL);
590: sosetlock(so);
591:
592: error = kauth_authorize_network(curlwp->l_cred,
593: KAUTH_NETWORK_SOCKET, KAUTH_REQ_NETWORK_SOCKET_RAWSOCK,
594: KAUTH_ARG(AF_INET6),
595: KAUTH_ARG(SOCK_RAW),
596: KAUTH_ARG(so->so_proto->pr_protocol));
597: if (error) {
598: return error;
599: }
600: s = splsoftnet();
601: error = soreserve(so, rip6_sendspace, rip6_recvspace);
602: if (error) {
603: splx(s);
604: return error;
605: }
606: if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) {
607: splx(s);
608: return error;
609: }
610: splx(s);
611: in6p = sotoin6pcb(so);
612: in6p->in6p_ip6.ip6_nxt = proto;
613: in6p->in6p_cksum = -1;
614:
615: in6p->in6p_icmp6filt = kmem_alloc(sizeof(struct icmp6_filter), KM_SLEEP);
616: ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt);
617: KASSERT(solocked(so));
618: return error;
619: }
620:
621: static void
622: rip6_detach(struct socket *so)
623: {
624: struct in6pcb *in6p = sotoin6pcb(so);
625:
626: KASSERT(solocked(so));
627: KASSERT(in6p != NULL);
628:
629: if (so == ip6_mrouter) {
630: ip6_mrouter_done();
631: }
632: /* xxx: RSVP */
633: if (in6p->in6p_icmp6filt != NULL) {
634: kmem_free(in6p->in6p_icmp6filt, sizeof(struct icmp6_filter));
635: in6p->in6p_icmp6filt = NULL;
636: }
637: in6_pcbdetach(in6p);
638: }
639:
1.119 rtr 640: static int
1.138 rtr 641: rip6_accept(struct socket *so, struct sockaddr *nam)
1.127 rtr 642: {
643: KASSERT(solocked(so));
644:
645: return EOPNOTSUPP;
646: }
647:
648: static int
1.137 rtr 649: rip6_bind(struct socket *so, struct sockaddr *nam, struct lwp *l)
1.129 rtr 650: {
651: struct in6pcb *in6p = sotoin6pcb(so);
1.137 rtr 652: struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
1.149 ozaki-r 653: struct ifaddr *ifa = NULL;
1.129 rtr 654: int error = 0;
1.149 ozaki-r 655: int s;
1.129 rtr 656:
657: KASSERT(solocked(so));
658: KASSERT(in6p != NULL);
659: KASSERT(nam != NULL);
660:
1.137 rtr 661: if (addr->sin6_len != sizeof(*addr))
1.129 rtr 662: return EINVAL;
1.143 ozaki-r 663: if (IFNET_READER_EMPTY() || addr->sin6_family != AF_INET6)
1.129 rtr 664: return EADDRNOTAVAIL;
665:
666: if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0)
667: return error;
668:
669: /*
670: * we don't support mapped address here, it would confuse
671: * users so reject it
672: */
673: if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr))
674: return EADDRNOTAVAIL;
1.149 ozaki-r 675: s = pserialize_read_enter();
1.129 rtr 676: if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
1.149 ozaki-r 677: (ifa = ifa_ifwithaddr(sin6tosa(addr))) == NULL) {
678: error = EADDRNOTAVAIL;
679: goto out;
680: }
681: if (ifa && (ifatoia6(ifa))->ia6_flags &
1.151 roy 682: (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED)) {
1.149 ozaki-r 683: error = EADDRNOTAVAIL;
684: goto out;
685: }
686:
1.129 rtr 687: in6p->in6p_laddr = addr->sin6_addr;
1.149 ozaki-r 688: error = 0;
689: out:
690: pserialize_read_exit(s);
691: return error;
1.129 rtr 692: }
693:
694: static int
1.133 rtr 695: rip6_listen(struct socket *so, struct lwp *l)
1.129 rtr 696: {
697: KASSERT(solocked(so));
698:
699: return EOPNOTSUPP;
700: }
701:
702: static int
1.140 rtr 703: rip6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
1.130 rtr 704: {
705: struct in6pcb *in6p = sotoin6pcb(so);
1.140 rtr 706: struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
1.152 ozaki-r 707: struct in6_addr in6a;
1.130 rtr 708: struct ifnet *ifp = NULL;
709: int scope_ambiguous = 0;
710: int error = 0;
1.146 ozaki-r 711: struct psref psref;
712: int bound;
1.130 rtr 713:
714: KASSERT(solocked(so));
715: KASSERT(in6p != NULL);
716: KASSERT(nam != NULL);
717:
1.143 ozaki-r 718: if (IFNET_READER_EMPTY())
1.130 rtr 719: return EADDRNOTAVAIL;
720: if (addr->sin6_family != AF_INET6)
721: return EAFNOSUPPORT;
722:
723: /*
724: * Application should provide a proper zone ID or the use of
725: * default zone IDs should be enabled. Unfortunately, some
726: * applications do not behave as it should, so we need a
727: * workaround. Even if an appropriate ID is not determined,
728: * we'll see if we can determine the outgoing interface. If we
729: * can, determine the zone ID based on the interface below.
730: */
731: if (addr->sin6_scope_id == 0 && !ip6_use_defzone)
732: scope_ambiguous = 1;
733: if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0)
734: return error;
735:
1.146 ozaki-r 736: bound = curlwp_bind();
1.130 rtr 737: /* Source address selection. XXX: need pcblookup? */
1.152 ozaki-r 738: error = in6_selectsrc(addr, in6p->in6p_outputopts,
1.130 rtr 739: in6p->in6p_moptions, &in6p->in6p_route,
1.152 ozaki-r 740: &in6p->in6p_laddr, &ifp, &psref, &in6a);
741: if (error != 0)
1.144 ozaki-r 742: goto out;
1.130 rtr 743: /* XXX: see above */
744: if (ifp && scope_ambiguous &&
745: (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) {
1.144 ozaki-r 746: goto out;
1.130 rtr 747: }
1.152 ozaki-r 748: in6p->in6p_laddr = in6a;
1.130 rtr 749: in6p->in6p_faddr = addr->sin6_addr;
750: soisconnected(so);
1.144 ozaki-r 751: out:
1.146 ozaki-r 752: if_put(ifp, &psref);
753: curlwp_bindx(bound);
1.130 rtr 754: return error;
755: }
756:
757: static int
1.136 rtr 758: rip6_connect2(struct socket *so, struct socket *so2)
759: {
760: KASSERT(solocked(so));
761:
762: return EOPNOTSUPP;
763: }
764:
765: static int
1.132 rtr 766: rip6_disconnect(struct socket *so)
767: {
768: struct in6pcb *in6p = sotoin6pcb(so);
769:
770: KASSERT(solocked(so));
771: KASSERT(in6p != NULL);
772:
773: if ((so->so_state & SS_ISCONNECTED) == 0)
774: return ENOTCONN;
775:
776: in6p->in6p_faddr = in6addr_any;
777: so->so_state &= ~SS_ISCONNECTED; /* XXX */
778: return 0;
779: }
780:
781: static int
782: rip6_shutdown(struct socket *so)
783: {
784: KASSERT(solocked(so));
785:
786: /*
787: * Mark the connection as being incapable of futther input.
788: */
789: socantsendmore(so);
790: return 0;
791: }
792:
793: static int
794: rip6_abort(struct socket *so)
795: {
796: KASSERT(solocked(so));
797:
798: soisdisconnected(so);
799: rip6_detach(so);
800: return 0;
801: }
802:
803: static int
1.121 rtr 804: rip6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
1.119 rtr 805: {
1.121 rtr 806: return in6_control(so, cmd, nam, ifp);
1.119 rtr 807: }
808:
1.122 rtr 809: static int
810: rip6_stat(struct socket *so, struct stat *ub)
811: {
1.125 rtr 812: KASSERT(solocked(so));
813:
1.124 rtr 814: /* stat: don't bother with a blocksize */
815: return 0;
1.122 rtr 816: }
817:
1.126 rtr 818: static int
1.138 rtr 819: rip6_peeraddr(struct socket *so, struct sockaddr *nam)
1.126 rtr 820: {
821: KASSERT(solocked(so));
822: KASSERT(sotoin6pcb(so) != NULL);
823: KASSERT(nam != NULL);
824:
1.138 rtr 825: in6_setpeeraddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam);
1.126 rtr 826: return 0;
827: }
828:
829: static int
1.138 rtr 830: rip6_sockaddr(struct socket *so, struct sockaddr *nam)
1.126 rtr 831: {
832: KASSERT(solocked(so));
833: KASSERT(sotoin6pcb(so) != NULL);
834: KASSERT(nam != NULL);
835:
1.138 rtr 836: in6_setsockaddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam);
1.126 rtr 837: return 0;
838: }
839:
1.128 rtr 840: static int
1.135 rtr 841: rip6_rcvd(struct socket *so, int flags, struct lwp *l)
842: {
843: KASSERT(solocked(so));
844:
845: return EOPNOTSUPP;
846: }
847:
848: static int
1.128 rtr 849: rip6_recvoob(struct socket *so, struct mbuf *m, int flags)
850: {
851: KASSERT(solocked(so));
852:
853: return EOPNOTSUPP;
854: }
855:
856: static int
1.140 rtr 857: rip6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
1.134 rtr 858: struct mbuf *control, struct lwp *l)
859: {
860: struct in6pcb *in6p = sotoin6pcb(so);
861: struct sockaddr_in6 tmp;
862: struct sockaddr_in6 *dst;
863: int error = 0;
864:
865: KASSERT(solocked(so));
866: KASSERT(in6p != NULL);
867: KASSERT(m != NULL);
868:
869: /*
870: * Ship a packet out. The appropriate raw output
871: * routine handles any messaging necessary.
872: */
873:
874: /* always copy sockaddr to avoid overwrites */
875: if (so->so_state & SS_ISCONNECTED) {
876: if (nam) {
877: error = EISCONN;
878: goto release;
879: }
880: /* XXX */
881: sockaddr_in6_init(&tmp, &in6p->in6p_faddr, 0, 0, 0);
882: dst = &tmp;
883: } else {
884: if (nam == NULL) {
885: error = ENOTCONN;
886: goto release;
887: }
1.140 rtr 888: tmp = *(struct sockaddr_in6 *)nam;
1.134 rtr 889: dst = &tmp;
890:
891: if (dst->sin6_family != AF_INET6) {
892: error = EAFNOSUPPORT;
893: goto release;
894: }
895: }
896: error = rip6_output(m, so, dst, control);
897: m = NULL;
898:
899: release:
900: if (m)
901: m_freem(m);
902:
903: return error;
904: }
905:
906: static int
1.128 rtr 907: rip6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
908: {
909: KASSERT(solocked(so));
910:
911: if (m)
912: m_freem(m);
913:
914: return EOPNOTSUPP;
915: }
916:
1.136 rtr 917: static int
918: rip6_purgeif(struct socket *so, struct ifnet *ifp)
919: {
920:
921: mutex_enter(softnet_lock);
1.155 ozaki-r 922: in6_pcbpurgeif0(&raw6cbtable, ifp);
923: #ifdef NET_MPSAFE
924: mutex_exit(softnet_lock);
1.153 knakahar 925: #endif
1.136 rtr 926: in6_purgeif(ifp);
1.155 ozaki-r 927: #ifdef NET_MPSAFE
928: mutex_enter(softnet_lock);
929: #endif
1.136 rtr 930: in6_pcbpurgeif(&raw6cbtable, ifp);
931: mutex_exit(softnet_lock);
932:
933: return 0;
934: }
935:
1.95 thorpej 936: static int
937: sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS)
938: {
939:
1.99 thorpej 940: return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS));
1.95 thorpej 941: }
942:
1.105 pooka 943: static void
944: sysctl_net_inet6_raw6_setup(struct sysctllog **clog)
1.69 atatat 945: {
946:
947: sysctl_createv(clog, 0, NULL, NULL,
948: CTLFLAG_PERMANENT,
949: CTLTYPE_NODE, "inet6", NULL,
950: NULL, 0, NULL, 0,
951: CTL_NET, PF_INET6, CTL_EOL);
952: sysctl_createv(clog, 0, NULL, NULL,
953: CTLFLAG_PERMANENT,
954: CTLTYPE_NODE, "raw6",
955: SYSCTL_DESCR("Raw IPv6 settings"),
956: NULL, 0, NULL, 0,
957: CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL);
958:
959: sysctl_createv(clog, 0, NULL, NULL,
960: CTLFLAG_PERMANENT,
1.71 atatat 961: CTLTYPE_STRUCT, "pcblist",
1.69 atatat 962: SYSCTL_DESCR("Raw IPv6 control block list"),
963: sysctl_inpcblist, 0, &raw6cbtable, 0,
964: CTL_NET, PF_INET6, IPPROTO_RAW,
965: CTL_CREATE, CTL_EOL);
1.73 rpaulo 966: sysctl_createv(clog, 0, NULL, NULL,
967: CTLFLAG_PERMANENT,
968: CTLTYPE_STRUCT, "stats",
969: SYSCTL_DESCR("Raw IPv6 statistics"),
1.95 thorpej 970: sysctl_net_inet6_raw6_stats, 0, NULL, 0,
1.73 rpaulo 971: CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS,
972: CTL_EOL);
1.69 atatat 973: }
1.115 rmind 974:
1.117 rmind 975: PR_WRAP_USRREQS(rip6)
976: #define rip6_attach rip6_attach_wrapper
977: #define rip6_detach rip6_detach_wrapper
1.127 rtr 978: #define rip6_accept rip6_accept_wrapper
1.129 rtr 979: #define rip6_bind rip6_bind_wrapper
980: #define rip6_listen rip6_listen_wrapper
1.130 rtr 981: #define rip6_connect rip6_connect_wrapper
1.136 rtr 982: #define rip6_connect2 rip6_connect2_wrapper
1.132 rtr 983: #define rip6_disconnect rip6_disconnect_wrapper
984: #define rip6_shutdown rip6_shutdown_wrapper
985: #define rip6_abort rip6_abort_wrapper
1.119 rtr 986: #define rip6_ioctl rip6_ioctl_wrapper
1.122 rtr 987: #define rip6_stat rip6_stat_wrapper
1.126 rtr 988: #define rip6_peeraddr rip6_peeraddr_wrapper
989: #define rip6_sockaddr rip6_sockaddr_wrapper
1.135 rtr 990: #define rip6_rcvd rip6_rcvd_wrapper
1.128 rtr 991: #define rip6_recvoob rip6_recvoob_wrapper
1.134 rtr 992: #define rip6_send rip6_send_wrapper
1.128 rtr 993: #define rip6_sendoob rip6_sendoob_wrapper
1.136 rtr 994: #define rip6_purgeif rip6_purgeif_wrapper
1.115 rmind 995:
996: const struct pr_usrreqs rip6_usrreqs = {
1.116 rmind 997: .pr_attach = rip6_attach,
998: .pr_detach = rip6_detach,
1.127 rtr 999: .pr_accept = rip6_accept,
1.129 rtr 1000: .pr_bind = rip6_bind,
1001: .pr_listen = rip6_listen,
1.130 rtr 1002: .pr_connect = rip6_connect,
1.136 rtr 1003: .pr_connect2 = rip6_connect2,
1.132 rtr 1004: .pr_disconnect = rip6_disconnect,
1005: .pr_shutdown = rip6_shutdown,
1006: .pr_abort = rip6_abort,
1.119 rtr 1007: .pr_ioctl = rip6_ioctl,
1.122 rtr 1008: .pr_stat = rip6_stat,
1.126 rtr 1009: .pr_peeraddr = rip6_peeraddr,
1010: .pr_sockaddr = rip6_sockaddr,
1.135 rtr 1011: .pr_rcvd = rip6_rcvd,
1.128 rtr 1012: .pr_recvoob = rip6_recvoob,
1.134 rtr 1013: .pr_send = rip6_send,
1.128 rtr 1014: .pr_sendoob = rip6_sendoob,
1.136 rtr 1015: .pr_purgeif = rip6_purgeif,
1.115 rmind 1016: };
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