bsd/netinet6/raw_ip6.c

   1 /*
   2  * Copyright (c) 2000-2019 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
  30  * All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. Neither the name of the project nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  * $FreeBSD: src/sys/netinet6/raw_ip6.c,v 1.7.2.4 2001/07/29 19:32:40 ume Exp $
  57  */
  58
  59 /*
  60  * Copyright (c) 1982, 1986, 1988, 1993
  61  *      The Regents of the University of California.  All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  * 1. Redistributions of source code must retain the above copyright
  67  *    notice, this list of conditions and the following disclaimer.
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in the
  70  *    documentation and/or other materials provided with the distribution.
  71  * 3. All advertising materials mentioning features or use of this software
  72  *    must display the following acknowledgement:
  73  *      This product includes software developed by the University of
  74  *      California, Berkeley and its contributors.
  75  * 4. Neither the name of the University nor the names of its contributors
  76  *    may be used to endorse or promote products derived from this software
  77  *    without specific prior written permission.
  78  *
  79  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  80  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  81  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  82  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  83  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  84  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  85  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  86  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  87  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  88  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  89  * SUCH DAMAGE.
  90  *
  91  *      @(#)raw_ip.c    8.2 (Berkeley) 1/4/94
  92  */
  93 #include <sys/param.h>
  94 #include <sys/malloc.h>
  95 #include <sys/proc.h>
  96 #include <sys/mcache.h>
  97 #include <sys/mbuf.h>
  98 #include <sys/socket.h>
  99 #include <sys/protosw.h>
 100 #include <sys/socketvar.h>
 101 #include <sys/errno.h>
 102 #include <sys/systm.h>
 103
 104 #include <net/if.h>
 105 #include <net/net_api_stats.h>
 106 #include <net/route.h>
 107 #include <net/if_types.h>
 108 #include <net/content_filter.h>
 109
 110 #include <netinet/in.h>
 111 #include <netinet/in_var.h>
 112 #include <netinet/in_systm.h>
 113 #include <netinet/in_tclass.h>
 114 #include <netinet/ip6.h>
 115 #include <netinet6/ip6_var.h>
 116 #include <netinet/icmp6.h>
 117 #include <netinet/in_pcb.h>
 118 #include <netinet6/in6_pcb.h>
 119 #include <netinet6/nd6.h>
 120 #include <netinet6/ip6protosw.h>
 121 #include <netinet6/scope6_var.h>
 122 #include <netinet6/raw_ip6.h>
 123
 124 #if IPSEC
 125 #include <netinet6/ipsec.h>
 126 #include <netinet6/ipsec6.h>
 127 #endif /*IPSEC*/
 128
 129 #if NECP
 130 #include <net/necp.h>
 131 #endif
 132
 133 /*
 134  * Raw interface to IP6 protocol.
 135  */
 136
 137 extern struct   inpcbhead ripcb;
 138 extern struct   inpcbinfo ripcbinfo;
 139 extern u_int32_t        rip_sendspace;
 140 extern u_int32_t        rip_recvspace;
 141
 142 struct rip6stat rip6stat;
 143
 144 /*
 145  * Setup generic address and protocol structures
 146  * for raw_input routine, then pass them along with
 147  * mbuf chain.
 148  */
 149 int
 150 rip6_input(
 151         struct  mbuf **mp,
 152         int     *offp,
 153         int     proto)
 154 {
 155         struct mbuf *m = *mp;
 156         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
 157         struct inpcb *in6p;
 158         struct inpcb *last = 0;
 159         struct mbuf *opts = NULL;
 160         struct sockaddr_in6 rip6src;
 161         int ret;
 162         struct ifnet *ifp = m->m_pkthdr.rcvif;
 163
 164         /* Expect 32-bit aligned data pointer on strict-align platforms */
 165         MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
 166
 167         rip6stat.rip6s_ipackets++;
 168
 169         init_sin6(&rip6src, m); /* general init */
 170
 171         lck_rw_lock_shared(ripcbinfo.ipi_lock);
 172         LIST_FOREACH(in6p, &ripcb, inp_list) {
 173                 if ((in6p->in6p_vflag & INP_IPV6) == 0) {
 174                         continue;
 175                 }
 176                 if (in6p->in6p_ip6_nxt &&
 177                     in6p->in6p_ip6_nxt != proto) {
 178                         continue;
 179                 }
 180                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 181                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) {
 182                         continue;
 183                 }
 184                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 185                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) {
 186                         continue;
 187                 }
 188
 189                 if (inp_restricted_recv(in6p, ifp)) {
 190                         continue;
 191                 }
 192
 193                 if (proto == IPPROTO_ICMPV6 || in6p->in6p_cksum != -1) {
 194                         rip6stat.rip6s_isum++;
 195                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 196                             m->m_pkthdr.len - *offp)) {
 197                                 rip6stat.rip6s_badsum++;
 198                                 continue;
 199                         }
 200                 }
 201                 if (last) {
 202                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 203
 204 #if NECP
 205                         if (n && !necp_socket_is_allowed_to_send_recv_v6(in6p, 0, 0,
 206                             &ip6->ip6_dst, &ip6->ip6_src, ifp, 0, NULL, NULL, NULL, NULL)) {
 207                                 m_freem(n);
 208                                 /* do not inject data into pcb */
 209                         } else
 210 #endif /* NECP */
 211                         if (n) {
 212                                 if ((last->in6p_flags & INP_CONTROLOPTS) != 0 ||
 213 #if CONTENT_FILTER
 214                                     /* Content Filter needs to see local address */
 215                                     (last->in6p_socket->so_cfil_db != NULL) ||
 216 #endif
 217                                     (last->in6p_socket->so_options & SO_TIMESTAMP) != 0 ||
 218                                     (last->in6p_socket->so_options & SO_TIMESTAMP_MONOTONIC) != 0 ||
 219                                     (last->in6p_socket->so_options & SO_TIMESTAMP_CONTINUOUS) != 0) {
 220                                         ret = ip6_savecontrol(last, n, &opts);
 221                                         if (ret != 0) {
 222                                                 m_freem(n);
 223                                                 m_freem(opts);
 224                                                 last = in6p;
 225                                                 continue;
 226                                         }
 227                                 }
 228                                 /* strip intermediate headers */
 229                                 m_adj(n, *offp);
 230                                 so_recv_data_stat(last->in6p_socket, m, 0);
 231                                 if (sbappendaddr(&last->in6p_socket->so_rcv,
 232                                     (struct sockaddr *)&rip6src,
 233                                     n, opts, NULL) == 0) {
 234                                         rip6stat.rip6s_fullsock++;
 235                                 } else {
 236                                         sorwakeup(last->in6p_socket);
 237                                 }
 238                                 opts = NULL;
 239                         }
 240                 }
 241                 last = in6p;
 242         }
 243
 244 #if NECP
 245         if (last && !necp_socket_is_allowed_to_send_recv_v6(in6p, 0, 0,
 246             &ip6->ip6_dst, &ip6->ip6_src, ifp, 0, NULL, NULL, NULL, NULL)) {
 247                 m_freem(m);
 248                 ip6stat.ip6s_delivered--;
 249                 /* do not inject data into pcb */
 250         } else
 251 #endif /* NECP */
 252         if (last) {
 253                 if ((last->in6p_flags & INP_CONTROLOPTS) != 0 ||
 254 #if CONTENT_FILTER
 255                     /* Content Filter needs to see local address */
 256                     (last->in6p_socket->so_cfil_db != NULL) ||
 257 #endif
 258                     (last->in6p_socket->so_options & SO_TIMESTAMP) != 0 ||
 259                     (last->in6p_socket->so_options & SO_TIMESTAMP_MONOTONIC) != 0 ||
 260                     (last->in6p_socket->so_options & SO_TIMESTAMP_CONTINUOUS) != 0) {
 261                         ret = ip6_savecontrol(last, m, &opts);
 262                         if (ret != 0) {
 263                                 m_freem(m);
 264                                 m_freem(opts);
 265                                 ip6stat.ip6s_delivered--;
 266                                 goto unlock;
 267                         }
 268                 }
 269                 /* strip intermediate headers */
 270                 m_adj(m, *offp);
 271                 so_recv_data_stat(last->in6p_socket, m, 0);
 272                 if (sbappendaddr(&last->in6p_socket->so_rcv,
 273                     (struct sockaddr *)&rip6src, m, opts, NULL) == 0) {
 274                         rip6stat.rip6s_fullsock++;
 275                 } else {
 276                         sorwakeup(last->in6p_socket);
 277                 }
 278         } else {
 279                 rip6stat.rip6s_nosock++;
 280                 if (m->m_flags & M_MCAST) {
 281                         rip6stat.rip6s_nosockmcast++;
 282                 }
 283                 if (proto == IPPROTO_NONE) {
 284                         m_freem(m);
 285                 } else {
 286                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 287                         icmp6_error(m, ICMP6_PARAM_PROB,
 288                             ICMP6_PARAMPROB_NEXTHEADER,
 289                             (int)(prvnxtp - mtod(m, char *)));
 290                 }
 291                 ip6stat.ip6s_delivered--;
 292         }
 293
 294 unlock:
 295         lck_rw_done(ripcbinfo.ipi_lock);
 296
 297         return IPPROTO_DONE;
 298 }
 299
 300 void
 301 rip6_ctlinput(
 302         int cmd,
 303         struct sockaddr *sa,
 304         void *d,
 305         __unused struct ifnet *ifp)
 306 {
 307         struct ip6_hdr *ip6 = NULL;
 308         struct mbuf *m = NULL;
 309         void *cmdarg = NULL;
 310         int off = 0;
 311         struct ip6ctlparam *ip6cp = NULL;
 312         const struct sockaddr_in6 *sa6_src = NULL;
 313         void (*notify)(struct inpcb *, int) = in6_rtchange;
 314
 315         if (sa->sa_family != AF_INET6 ||
 316             sa->sa_len != sizeof(struct sockaddr_in6)) {
 317                 return;
 318         }
 319
 320         if ((unsigned)cmd >= PRC_NCMDS) {
 321                 return;
 322         }
 323         if (PRC_IS_REDIRECT(cmd)) {
 324                 notify = in6_rtchange;
 325                 d = NULL;
 326         } else if (cmd == PRC_HOSTDEAD) {
 327                 d = NULL;
 328         } else if (inet6ctlerrmap[cmd] == 0) {
 329                 return;
 330         }
 331
 332         /* if the parameter is from icmp6, decode it. */
 333         if (d != NULL) {
 334                 ip6cp = (struct ip6ctlparam *)d;
 335                 m = ip6cp->ip6c_m;
 336                 ip6 = ip6cp->ip6c_ip6;
 337                 off = ip6cp->ip6c_off;
 338                 cmdarg = ip6cp->ip6c_cmdarg;
 339                 sa6_src = ip6cp->ip6c_src;
 340         } else {
 341                 m = NULL;
 342                 ip6 = NULL;
 343                 cmdarg = NULL;
 344                 sa6_src = &sa6_any;
 345         }
 346
 347         (void) in6_pcbnotify(&ripcbinfo, sa, 0, (const struct sockaddr *)sa6_src,
 348             0, cmd, cmdarg, notify);
 349 }
 350
 351 /*
 352  * Generate IPv6 header and pass packet to ip6_output.
 353  * Tack on options user may have setup with control call.
 354  */
 355 int
 356 rip6_output(
 357         struct mbuf *m,
 358         struct socket *so,
 359         struct sockaddr_in6 *dstsock,
 360         struct mbuf *control,
 361         int israw)
 362 {
 363         struct in6_addr *dst;
 364         struct ip6_hdr *ip6;
 365         struct inpcb *in6p;
 366         u_int   plen = m->m_pkthdr.len;
 367         int error = 0;
 368         struct ip6_pktopts opt, *optp = NULL;
 369         struct ip6_moptions *im6o = NULL;
 370         struct ifnet *oifp = NULL;
 371         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
 372         int sotc = SO_TC_UNSPEC;
 373         int netsvctype = _NET_SERVICE_TYPE_UNSPEC;
 374         struct ip6_out_args ip6oa;
 375         int flags = IPV6_OUTARGS;
 376         struct sockaddr_in6 tmp;
 377 #if CONTENT_FILTER
 378         struct m_tag *cfil_tag = NULL;
 379         bool cfil_faddr_use = false;
 380         uint32_t cfil_so_state_change_cnt = 0;
 381         uint32_t cfil_so_options = 0;
 382         struct sockaddr *cfil_faddr = NULL;
 383         struct sockaddr_in6 *cfil_sin6 = NULL;
 384 #endif
 385
 386         in6p = sotoin6pcb(so);
 387         if (in6p == NULL) {
 388                 error = EINVAL;
 389                 goto bad;
 390         }
 391
 392 #if CONTENT_FILTER
 393         /*
 394          * If socket is subject to Content Filter and no addr is passed in,
 395          * retrieve CFIL saved state from mbuf and use it if necessary.
 396          */
 397         if (so->so_cfil_db && !dstsock) {
 398                 cfil_tag = cfil_dgram_get_socket_state(m, &cfil_so_state_change_cnt, &cfil_so_options, &cfil_faddr, NULL);
 399                 if (cfil_tag) {
 400                         cfil_sin6 = SIN6(cfil_faddr);
 401                         if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
 402                                 /*
 403                                  * Socket is unconnected, simply use the saved faddr as 'addr' to go through
 404                                  * the connect/disconnect logic.
 405                                  */
 406                                 dstsock = cfil_sin6;
 407                         } else if ((so->so_state_change_cnt != cfil_so_state_change_cnt) &&
 408                             (in6p->in6p_fport != cfil_sin6->sin6_port ||
 409                             !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &cfil_sin6->sin6_addr))) {
 410                                 /*
 411                                  * Socket is connected but socket state and dest addr/port changed.
 412                                  * We need to use the saved faddr and socket options.
 413                                  */
 414                                 cfil_faddr_use = true;
 415                         }
 416                 }
 417         }
 418 #endif
 419
 420         /* always copy sockaddr to avoid overwrites */
 421         if (so->so_state & SS_ISCONNECTED) {
 422                 if (dstsock != NULL) {
 423                         error = EISCONN;
 424                         goto bad;
 425                 }
 426                 /* XXX */
 427                 bzero(&tmp, sizeof(tmp));
 428                 tmp.sin6_family = AF_INET6;
 429                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 430                 bcopy(
 431 #if CONTENT_FILTER
 432                         cfil_faddr_use ? &cfil_sin6->sin6_addr :
 433 #endif
 434                         &in6p->in6p_faddr, &tmp.sin6_addr, sizeof(struct in6_addr));
 435                 dstsock = &tmp;
 436         } else {
 437                 if (dstsock == NULL) {
 438                         error = ENOTCONN;
 439                         goto bad;
 440                 }
 441                 tmp = *dstsock;
 442                 dstsock = &tmp;
 443         }
 444
 445 #if ENABLE_DEFAULT_SCOPE
 446         if (dstsock->sin6_scope_id == 0) { /* not change if specified  */
 447                 dstsock->sin6_scope_id = scope6_addr2default(&dstsock->sin6_addr);
 448         }
 449 #endif
 450
 451         bzero(&ip6oa, sizeof(ip6oa));
 452         ip6oa.ip6oa_boundif = IFSCOPE_NONE;
 453         ip6oa.ip6oa_flags = IP6OAF_SELECT_SRCIF;
 454
 455         if (in6p == NULL
 456 #if NECP
 457             || (necp_socket_should_use_flow_divert(in6p))
 458 #endif /* NECP */
 459             ) {
 460                 if (in6p == NULL) {
 461                         error = EINVAL;
 462                 } else {
 463                         error = EPROTOTYPE;
 464                 }
 465                 goto bad;
 466         }
 467         if (dstsock != NULL && IN6_IS_ADDR_V4MAPPED(&dstsock->sin6_addr)) {
 468                 error = EINVAL;
 469                 goto bad;
 470         }
 471
 472         if (in6p->inp_flags & INP_BOUND_IF) {
 473                 ip6oa.ip6oa_boundif = in6p->inp_boundifp->if_index;
 474                 ip6oa.ip6oa_flags |= IP6OAF_BOUND_IF;
 475         }
 476         if (INP_NO_CELLULAR(in6p)) {
 477                 ip6oa.ip6oa_flags |= IP6OAF_NO_CELLULAR;
 478         }
 479         if (INP_NO_EXPENSIVE(in6p)) {
 480                 ip6oa.ip6oa_flags |= IP6OAF_NO_EXPENSIVE;
 481         }
 482         if (INP_NO_CONSTRAINED(in6p)) {
 483                 ip6oa.ip6oa_flags |= IP6OAF_NO_CONSTRAINED;
 484         }
 485         if (INP_AWDL_UNRESTRICTED(in6p)) {
 486                 ip6oa.ip6oa_flags |= IP6OAF_AWDL_UNRESTRICTED;
 487         }
 488         if (INP_INTCOPROC_ALLOWED(in6p)) {
 489                 ip6oa.ip6oa_flags |= IP6OAF_INTCOPROC_ALLOWED;
 490         }
 491
 492         dst = &dstsock->sin6_addr;
 493         if (control) {
 494                 sotc = so_tc_from_control(control, &netsvctype);
 495
 496                 if ((error = ip6_setpktopts(control, &opt, NULL,
 497                     SOCK_PROTO(so))) != 0) {
 498                         goto bad;
 499                 }
 500                 optp = &opt;
 501         } else {
 502                 optp = in6p->in6p_outputopts;
 503         }
 504         if (sotc == SO_TC_UNSPEC) {
 505                 sotc = so->so_traffic_class;
 506                 netsvctype = so->so_netsvctype;
 507         }
 508         ip6oa.ip6oa_sotc = sotc;
 509         ip6oa.ip6oa_netsvctype = netsvctype;
 510
 511         /*
 512          * For an ICMPv6 packet, we should know its type and code
 513          * to update statistics.
 514          */
 515         if (SOCK_PROTO(so) == IPPROTO_ICMPV6) {
 516                 struct icmp6_hdr *icmp6;
 517                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 518                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 519                         error = ENOBUFS;
 520                         goto bad;
 521                 }
 522                 icmp6 = mtod(m, struct icmp6_hdr *);
 523                 type = icmp6->icmp6_type;
 524                 code = icmp6->icmp6_code;
 525         }
 526
 527         if (in6p->inp_flowhash == 0) {
 528                 in6p->inp_flowhash = inp_calc_flowhash(in6p);
 529         }
 530         /* update flowinfo - RFC 6437 */
 531         if (in6p->inp_flow == 0 && in6p->in6p_flags & IN6P_AUTOFLOWLABEL) {
 532                 in6p->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 533                 in6p->inp_flow |=
 534                     (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
 535         }
 536
 537         M_PREPEND(m, sizeof(*ip6), M_WAIT, 1);
 538         if (m == NULL) {
 539                 error = ENOBUFS;
 540                 goto bad;
 541         }
 542         ip6 = mtod(m, struct ip6_hdr *);
 543
 544         /*
 545          * Next header might not be ICMP6 but use its pseudo header anyway.
 546          */
 547         ip6->ip6_dst = *dst;
 548
 549         im6o = in6p->in6p_moptions;
 550
 551         /*
 552          * If the scope of the destination is link-local, embed the interface
 553          * index in the address.
 554          *
 555          * XXX advanced-api value overrides sin6_scope_id
 556          */
 557         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
 558                 struct in6_pktinfo *pi;
 559                 struct ifnet *im6o_multicast_ifp = NULL;
 560
 561                 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && im6o != NULL) {
 562                         IM6O_LOCK(im6o);
 563                         im6o_multicast_ifp = im6o->im6o_multicast_ifp;
 564                         IM6O_UNLOCK(im6o);
 565                 }
 566                 /*
 567                  * XXX Boundary check is assumed to be already done in
 568                  * ip6_setpktoptions().
 569                  */
 570                 ifnet_head_lock_shared();
 571                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 572                         ip6->ip6_dst.s6_addr16[1] = htons((uint16_t)pi->ipi6_ifindex);
 573                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 574                         if (oifp != NULL) {
 575                                 ifnet_reference(oifp);
 576                         }
 577                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 578                     im6o != NULL && im6o_multicast_ifp != NULL) {
 579                         oifp = im6o_multicast_ifp;
 580                         ifnet_reference(oifp);
 581                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 582                 } else if (dstsock->sin6_scope_id) {
 583                         /*
 584                          * boundary check
 585                          *
 586                          * Sinced stsock->sin6_scope_id is unsigned, we don't
 587                          * need to check if it's < 0
 588                          */
 589                         if (if_index < dstsock->sin6_scope_id) {
 590                                 error = ENXIO;  /* XXX EINVAL? */
 591                                 ifnet_head_done();
 592                                 goto bad;
 593                         }
 594                         ip6->ip6_dst.s6_addr16[1]
 595                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
 596                 }
 597                 ifnet_head_done();
 598         }
 599
 600         /*
 601          * Source address selection.
 602          */
 603         {
 604                 struct in6_addr *in6a;
 605                 struct in6_addr storage;
 606                 u_short index = 0;
 607
 608                 if (israw != 0 && optp && optp->ip6po_pktinfo && !IN6_IS_ADDR_UNSPECIFIED(&optp->ip6po_pktinfo->ipi6_addr)) {
 609                         in6a = &optp->ip6po_pktinfo->ipi6_addr;
 610                         flags |= IPV6_FLAG_NOSRCIFSEL;
 611                 } else if ((in6a = in6_selectsrc(dstsock, optp, in6p,
 612                     &in6p->in6p_route, NULL, &storage, ip6oa.ip6oa_boundif,
 613                     &error)) == 0) {
 614                         if (error == 0) {
 615                                 error = EADDRNOTAVAIL;
 616                         }
 617                         goto bad;
 618                 } else {
 619                         ip6oa.ip6oa_flags |= IP6OAF_BOUND_SRCADDR;
 620                 }
 621                 ip6->ip6_src = *in6a;
 622                 if (in6p->in6p_route.ro_rt != NULL) {
 623                         RT_LOCK(in6p->in6p_route.ro_rt);
 624                         if (in6p->in6p_route.ro_rt->rt_ifp != NULL) {
 625                                 index = in6p->in6p_route.ro_rt->rt_ifp->if_index;
 626                         }
 627                         RT_UNLOCK(in6p->in6p_route.ro_rt);
 628                         if (oifp != NULL) {
 629                                 ifnet_release(oifp);
 630                         }
 631                         ifnet_head_lock_shared();
 632                         if (index == 0 || if_index < index) {
 633                                 panic("bad if_index on interface from route");
 634                         }
 635                         oifp = ifindex2ifnet[index];
 636                         if (oifp != NULL) {
 637                                 ifnet_reference(oifp);
 638                         }
 639                         ifnet_head_done();
 640                 }
 641         }
 642         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 643             (in6p->inp_flow & IPV6_FLOWINFO_MASK);
 644         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 645             (IPV6_VERSION & IPV6_VERSION_MASK);
 646         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 647         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 648         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 649
 650         if (SOCK_PROTO(so) == IPPROTO_ICMPV6 || in6p->in6p_cksum != -1) {
 651                 struct mbuf *n;
 652                 int off;
 653                 u_int16_t *p;
 654
 655                 /* compute checksum */
 656                 if (SOCK_PROTO(so) == IPPROTO_ICMPV6) {
 657                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 658                 } else {
 659                         off = in6p->in6p_cksum;
 660                 }
 661                 if (plen < (unsigned int)(off + 1)) {
 662                         error = EINVAL;
 663                         goto bad;
 664                 }
 665                 off += sizeof(struct ip6_hdr);
 666
 667                 n = m;
 668                 while (n && n->m_len <= off) {
 669                         off -= n->m_len;
 670                         n = n->m_next;
 671                 }
 672                 if (!n) {
 673                         goto bad;
 674                 }
 675                 p = (u_int16_t *)(void *)(mtod(n, caddr_t) + off);
 676                 *p = 0;
 677                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 678         }
 679
 680 #if NECP
 681         {
 682                 necp_kernel_policy_id policy_id;
 683                 necp_kernel_policy_id skip_policy_id;
 684                 u_int32_t route_rule_id;
 685                 u_int32_t pass_flags;
 686
 687                 /*
 688                  * We need a route to perform NECP route rule checks
 689                  */
 690                 if ((net_qos_policy_restricted != 0 &&
 691                     ROUTE_UNUSABLE(&in6p->in6p_route))
 692 #if CONTENT_FILTER
 693                     || cfil_faddr_use
 694 #endif
 695                     ) {
 696                         struct sockaddr_in6 to;
 697                         struct sockaddr_in6 from;
 698
 699                         ROUTE_RELEASE(&in6p->in6p_route);
 700
 701                         bzero(&from, sizeof(struct sockaddr_in6));
 702                         from.sin6_family = AF_INET6;
 703                         from.sin6_len = sizeof(struct sockaddr_in6);
 704                         from.sin6_addr = ip6->ip6_src;
 705
 706                         bzero(&to, sizeof(struct sockaddr_in6));
 707                         to.sin6_family = AF_INET6;
 708                         to.sin6_len = sizeof(struct sockaddr_in6);
 709                         to.sin6_addr = ip6->ip6_dst;
 710
 711                         in6p->in6p_route.ro_dst.sin6_family = AF_INET6;
 712                         in6p->in6p_route.ro_dst.sin6_len = sizeof(struct sockaddr_in6);
 713                         ((struct sockaddr_in6 *)(void *)&in6p->in6p_route.ro_dst)->sin6_addr =
 714                             ip6->ip6_dst;
 715
 716                         rtalloc_scoped((struct route *)&in6p->in6p_route, ip6oa.ip6oa_boundif);
 717
 718                         inp_update_necp_policy(in6p, (struct sockaddr *)&from,
 719                             (struct sockaddr *)&to, ip6oa.ip6oa_boundif);
 720                         in6p->inp_policyresult.results.qos_marking_gencount = 0;
 721                 }
 722
 723                 if (!necp_socket_is_allowed_to_send_recv_v6(in6p, 0, 0,
 724                     &ip6->ip6_src, &ip6->ip6_dst, NULL, 0, &policy_id, &route_rule_id, &skip_policy_id, &pass_flags)) {
 725                         error = EHOSTUNREACH;
 726                         goto bad;
 727                 }
 728
 729                 necp_mark_packet_from_socket(m, in6p, policy_id, route_rule_id, skip_policy_id, pass_flags);
 730
 731                 if (net_qos_policy_restricted != 0) {
 732                         necp_socket_update_qos_marking(in6p, in6p->in6p_route.ro_rt, route_rule_id);
 733                 }
 734         }
 735 #endif /* NECP */
 736         if ((so->so_flags1 & SOF1_QOSMARKING_ALLOWED)) {
 737                 ip6oa.ip6oa_flags |= IP6OAF_QOSMARKING_ALLOWED;
 738         }
 739
 740 #if IPSEC
 741         if (in6p->in6p_sp != NULL && ipsec_setsocket(m, so) != 0) {
 742                 error = ENOBUFS;
 743                 goto bad;
 744         }
 745 #endif /*IPSEC*/
 746
 747         if (ROUTE_UNUSABLE(&in6p->in6p_route)) {
 748                 ROUTE_RELEASE(&in6p->in6p_route);
 749         }
 750
 751         if (oifp != NULL) {
 752                 ifnet_release(oifp);
 753                 oifp = NULL;
 754         }
 755
 756         set_packet_service_class(m, so, sotc, PKT_SCF_IPV6);
 757         m->m_pkthdr.pkt_flowsrc = FLOWSRC_INPCB;
 758         m->m_pkthdr.pkt_flowid = in6p->inp_flowhash;
 759         m->m_pkthdr.pkt_flags |= (PKTF_FLOW_ID | PKTF_FLOW_LOCALSRC |
 760             PKTF_FLOW_RAWSOCK);
 761         m->m_pkthdr.pkt_proto = in6p->in6p_ip6_nxt;
 762         m->m_pkthdr.tx_rawip_pid = so->last_pid;
 763         if (so->so_flags & SOF_DELEGATED) {
 764                 m->m_pkthdr.tx_rawip_e_pid = so->e_pid;
 765         } else {
 766                 m->m_pkthdr.tx_rawip_e_pid = 0;
 767         }
 768
 769         if (im6o != NULL) {
 770                 IM6O_ADDREF(im6o);
 771         }
 772
 773         error = ip6_output(m, optp, &in6p->in6p_route, flags, im6o,
 774             &oifp, &ip6oa);
 775
 776         if (im6o != NULL) {
 777                 IM6O_REMREF(im6o);
 778         }
 779
 780         if (in6p->in6p_route.ro_rt != NULL) {
 781                 struct rtentry *rt = in6p->in6p_route.ro_rt;
 782                 struct ifnet *outif;
 783
 784                 if ((rt->rt_flags & RTF_MULTICAST) ||
 785                     in6p->in6p_socket == NULL ||
 786 #if CONTENT_FILTER
 787                     /* Discard temporary route for cfil case */
 788                     cfil_faddr_use ||
 789 #endif
 790                     !(in6p->in6p_socket->so_state & SS_ISCONNECTED)) {
 791                         rt = NULL;      /* unusable */
 792                 }
 793                 /*
 794                  * Always discard the cached route for unconnected
 795                  * socket or if it is a multicast route.
 796                  */
 797                 if (rt == NULL) {
 798                         ROUTE_RELEASE(&in6p->in6p_route);
 799                 }
 800
 801                 /*
 802                  * If this is a connected socket and the destination
 803                  * route is not multicast, update outif with that of
 804                  * the route interface index used by IP.
 805                  */
 806                 if (rt != NULL) {
 807                         /*
 808                          * When an NECP IP tunnel policy forces the outbound interface,
 809                          * ip6_output_list() informs the transport layer what is the actual
 810                          * outgoing interface
 811                          */
 812                         if (ip6oa.ip6oa_flags & IP6OAF_BOUND_IF) {
 813                                 outif = ifindex2ifnet[ip6oa.ip6oa_boundif];
 814                         } else {
 815                                 outif = rt->rt_ifp;
 816                         }
 817                         if (outif != NULL) {
 818                                 in6p->in6p_last_outifp = outif;
 819                         }
 820                 }
 821         } else {
 822                 ROUTE_RELEASE(&in6p->in6p_route);
 823         }
 824
 825         /*
 826          * If output interface was cellular/expensive, and this socket is
 827          * denied access to it, generate an event.
 828          */
 829         if (error != 0 && (ip6oa.ip6oa_retflags & IP6OARF_IFDENIED) &&
 830             (INP_NO_CELLULAR(in6p) || INP_NO_EXPENSIVE(in6p) || INP_NO_CONSTRAINED(in6p))) {
 831                 soevent(in6p->inp_socket, (SO_FILT_HINT_LOCKED |
 832                     SO_FILT_HINT_IFDENIED));
 833         }
 834
 835         if (SOCK_PROTO(so) == IPPROTO_ICMPV6) {
 836                 if (oifp) {
 837                         icmp6_ifoutstat_inc(oifp, type, code);
 838                 }
 839                 icmp6stat.icp6s_outhist[type]++;
 840         } else {
 841                 rip6stat.rip6s_opackets++;
 842         }
 843
 844         goto freectl;
 845
 846 bad:
 847         if (m != NULL) {
 848                 m_freem(m);
 849         }
 850
 851 freectl:
 852         if (optp == &opt && optp->ip6po_rthdr) {
 853                 ROUTE_RELEASE(&optp->ip6po_route);
 854         }
 855
 856         if (control != NULL) {
 857                 if (optp == &opt) {
 858                         ip6_clearpktopts(optp, -1);
 859                 }
 860                 m_freem(control);
 861         }
 862         if (oifp != NULL) {
 863                 ifnet_release(oifp);
 864         }
 865 #if CONTENT_FILTER
 866         if (cfil_tag) {
 867                 m_tag_free(cfil_tag);
 868         }
 869 #endif
 870
 871         return error;
 872 }
 873
 874 /*
 875  * Raw IPv6 socket option processing.
 876  */
 877 int
 878 rip6_ctloutput(
 879         struct socket *so,
 880         struct sockopt *sopt)
 881 {
 882         int error, optval;
 883
 884         /* Allow <SOL_SOCKET,SO_FLUSH> at this level */
 885         if (sopt->sopt_level == IPPROTO_ICMPV6) {
 886                 /*
 887                  * XXX: is it better to call icmp6_ctloutput() directly
 888                  * from protosw?
 889                  */
 890                 return icmp6_ctloutput(so, sopt);
 891         } else if (sopt->sopt_level != IPPROTO_IPV6 &&
 892             !(sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_FLUSH)) {
 893                 return EINVAL;
 894         }
 895
 896         error = 0;
 897
 898         switch (sopt->sopt_dir) {
 899         case SOPT_GET:
 900                 switch (sopt->sopt_name) {
 901                 case IPV6_CHECKSUM:
 902                         error = ip6_raw_ctloutput(so, sopt);
 903                         break;
 904                 default:
 905                         error = ip6_ctloutput(so, sopt);
 906                         break;
 907                 }
 908                 break;
 909
 910         case SOPT_SET:
 911                 switch (sopt->sopt_name) {
 912                 case IPV6_CHECKSUM:
 913                         error = ip6_raw_ctloutput(so, sopt);
 914                         break;
 915
 916                 case SO_FLUSH:
 917                         if ((error = sooptcopyin(sopt, &optval, sizeof(optval),
 918                             sizeof(optval))) != 0) {
 919                                 break;
 920                         }
 921
 922                         error = inp_flush(sotoinpcb(so), optval);
 923                         break;
 924
 925                 default:
 926                         error = ip6_ctloutput(so, sopt);
 927                         break;
 928                 }
 929                 break;
 930         }
 931
 932         return error;
 933 }
 934
 935 static int
 936 rip6_attach(struct socket *so, int proto, struct proc *p)
 937 {
 938         struct inpcb *inp;
 939         int error;
 940
 941         inp = sotoinpcb(so);
 942         if (inp) {
 943                 panic("rip6_attach");
 944         }
 945         if ((error = proc_suser(p)) != 0) {
 946                 return error;
 947         }
 948
 949         error = soreserve(so, rip_sendspace, rip_recvspace);
 950         if (error) {
 951                 return error;
 952         }
 953         error = in_pcballoc(so, &ripcbinfo, p);
 954         if (error) {
 955                 return error;
 956         }
 957         inp = (struct inpcb *)so->so_pcb;
 958         inp->inp_vflag |= INP_IPV6;
 959         inp->in6p_ip6_nxt = (char)proto;
 960         inp->in6p_hops = -1;    /* use kernel default */
 961         inp->in6p_cksum = -1;
 962         MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *,
 963             sizeof(struct icmp6_filter), M_PCB, M_WAITOK);
 964         if (inp->in6p_icmp6filt == NULL) {
 965                 return ENOMEM;
 966         }
 967         ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 968         return 0;
 969 }
 970
 971 static int
 972 rip6_detach(struct socket *so)
 973 {
 974         struct inpcb *inp;
 975
 976         inp = sotoinpcb(so);
 977         if (inp == 0) {
 978                 panic("rip6_detach");
 979         }
 980         /* xxx: RSVP */
 981         if (inp->in6p_icmp6filt) {
 982                 FREE(inp->in6p_icmp6filt, M_PCB);
 983                 inp->in6p_icmp6filt = NULL;
 984         }
 985         in6_pcbdetach(inp);
 986         return 0;
 987 }
 988
 989 static int
 990 rip6_abort(struct socket *so)
 991 {
 992         soisdisconnected(so);
 993         return rip6_detach(so);
 994 }
 995
 996 static int
 997 rip6_disconnect(struct socket *so)
 998 {
 999         struct inpcb *inp = sotoinpcb(so);
1000
1001         if ((so->so_state & SS_ISCONNECTED) == 0) {
1002                 return ENOTCONN;
1003         }
1004         inp->in6p_faddr = in6addr_any;
1005         return rip6_abort(so);
1006 }
1007
1008 static int
1009 rip6_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
1010 {
1011 #pragma unused(p)
1012         struct inpcb *inp = sotoinpcb(so);
1013         struct sockaddr_in6 sin6;
1014         struct ifaddr *ifa = NULL;
1015         struct ifnet *outif = NULL;
1016         int error;
1017
1018         if (inp == NULL
1019 #if NECP
1020             || (necp_socket_should_use_flow_divert(inp))
1021 #endif /* NECP */
1022             ) {
1023                 return inp == NULL ? EINVAL : EPROTOTYPE;
1024         }
1025
1026         if (nam->sa_len != sizeof(struct sockaddr_in6)) {
1027                 return EINVAL;
1028         }
1029
1030         if (TAILQ_EMPTY(&ifnet_head) || SIN6(nam)->sin6_family != AF_INET6) {
1031                 return EADDRNOTAVAIL;
1032         }
1033
1034         bzero(&sin6, sizeof(sin6));
1035         *(&sin6) = *SIN6(nam);
1036
1037         if ((error = sa6_embedscope(&sin6, ip6_use_defzone)) != 0) {
1038                 return error;
1039         }
1040
1041         /* Sanitize local copy for address searches */
1042         sin6.sin6_flowinfo = 0;
1043         sin6.sin6_scope_id = 0;
1044         sin6.sin6_port = 0;
1045
1046         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) &&
1047             (ifa = ifa_ifwithaddr(SA(&sin6))) == 0) {
1048                 return EADDRNOTAVAIL;
1049         }
1050         if (ifa != NULL) {
1051                 IFA_LOCK(ifa);
1052                 if (((struct in6_ifaddr *)ifa)->ia6_flags &
1053                     (IN6_IFF_ANYCAST | IN6_IFF_NOTREADY | IN6_IFF_CLAT46 |
1054                     IN6_IFF_DETACHED | IN6_IFF_DEPRECATED)) {
1055                         IFA_UNLOCK(ifa);
1056                         IFA_REMREF(ifa);
1057                         return EADDRNOTAVAIL;
1058                 }
1059                 outif = ifa->ifa_ifp;
1060                 IFA_UNLOCK(ifa);
1061                 IFA_REMREF(ifa);
1062         }
1063         inp->in6p_laddr = sin6.sin6_addr;
1064         inp->in6p_last_outifp = outif;
1065
1066         return 0;
1067 }
1068
1069 static int
1070 rip6_connect(struct socket *so, struct sockaddr *nam, __unused struct proc *p)
1071 {
1072         struct inpcb *inp = sotoinpcb(so);
1073         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)(void *)nam;
1074         struct in6_addr *in6a = NULL;
1075         struct in6_addr storage;
1076         int error = 0;
1077 #if ENABLE_DEFAULT_SCOPE
1078         struct sockaddr_in6 tmp;
1079 #endif
1080         unsigned int ifscope;
1081         struct ifnet *outif = NULL;
1082
1083         if (inp == NULL
1084 #if NECP
1085             || (necp_socket_should_use_flow_divert(inp))
1086 #endif /* NECP */
1087             ) {
1088                 return inp == NULL ? EINVAL : EPROTOTYPE;
1089         }
1090         if (nam->sa_len != sizeof(*addr)) {
1091                 return EINVAL;
1092         }
1093         if (TAILQ_EMPTY(&ifnet_head)) {
1094                 return EADDRNOTAVAIL;
1095         }
1096         if (addr->sin6_family != AF_INET6) {
1097                 return EAFNOSUPPORT;
1098         }
1099
1100         if (!(so->so_flags1 & SOF1_CONNECT_COUNTED)) {
1101                 so->so_flags1 |= SOF1_CONNECT_COUNTED;
1102                 INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_inet6_dgram_connected);
1103         }
1104
1105 #if ENABLE_DEFAULT_SCOPE
1106         if (addr->sin6_scope_id == 0) { /* not change if specified  */
1107                 /* avoid overwrites */
1108                 tmp = *addr;
1109                 addr = &tmp;
1110                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
1111         }
1112 #endif
1113
1114         /* KAME hack: embed scopeid */
1115         if (in6_embedscope(&SIN6(nam)->sin6_addr, SIN6(nam), inp, NULL, NULL) != 0) {
1116                 return EINVAL;
1117         }
1118
1119         ifscope = (inp->inp_flags & INP_BOUND_IF) ?
1120             inp->inp_boundifp->if_index : IFSCOPE_NONE;
1121
1122         /* Source address selection. XXX: need pcblookup? */
1123         in6a = in6_selectsrc(addr, inp->in6p_outputopts, inp, &inp->in6p_route,
1124             NULL, &storage, ifscope, &error);
1125         if (in6a == NULL) {
1126                 return error ? error : EADDRNOTAVAIL;
1127         }
1128         inp->in6p_laddr = *in6a;
1129         inp->in6p_faddr = addr->sin6_addr;
1130         if (inp->in6p_route.ro_rt != NULL) {
1131                 outif = inp->in6p_route.ro_rt->rt_ifp;
1132         }
1133         inp->in6p_last_outifp = outif;
1134
1135         soisconnected(so);
1136         return 0;
1137 }
1138
1139 static int
1140 rip6_shutdown(struct socket *so)
1141 {
1142         socantsendmore(so);
1143         return 0;
1144 }
1145
1146 static int
1147 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
1148     struct mbuf *control, struct proc *p)
1149 {
1150 #pragma unused(flags, p)
1151         struct inpcb *inp = sotoinpcb(so);
1152         int error = 0;
1153
1154         if (inp == NULL
1155 #if NECP
1156             || (necp_socket_should_use_flow_divert(inp))
1157 #endif /* NECP */
1158             ) {
1159                 if (inp == NULL) {
1160                         error = EINVAL;
1161                 } else {
1162                         error = EPROTOTYPE;
1163                 }
1164                 goto bad;
1165         }
1166
1167         return rip6_output(m, so, SIN6(nam), control, 1);
1168
1169 bad:
1170         VERIFY(error != 0);
1171
1172         if (m != NULL) {
1173                 m_freem(m);
1174         }
1175         if (control != NULL) {
1176                 m_freem(control);
1177         }
1178
1179         return error;
1180 }
1181
1182 struct pr_usrreqs rip6_usrreqs = {
1183         .pru_abort =            rip6_abort,
1184         .pru_attach =           rip6_attach,
1185         .pru_bind =             rip6_bind,
1186         .pru_connect =          rip6_connect,
1187         .pru_control =          in6_control,
1188         .pru_detach =           rip6_detach,
1189         .pru_disconnect =       rip6_disconnect,
1190         .pru_peeraddr =         in6_getpeeraddr,
1191         .pru_send =             rip6_send,
1192         .pru_shutdown =         rip6_shutdown,
1193         .pru_sockaddr =         in6_getsockaddr,
1194         .pru_sosend =           sosend,
1195         .pru_soreceive =        soreceive,
1196 };
1197
1198 __private_extern__ struct pr_usrreqs icmp6_dgram_usrreqs = {
1199         .pru_abort =            rip6_abort,
1200         .pru_attach =           icmp6_dgram_attach,
1201         .pru_bind =             rip6_bind,
1202         .pru_connect =          rip6_connect,
1203         .pru_control =          in6_control,
1204         .pru_detach =           rip6_detach,
1205         .pru_disconnect =       rip6_disconnect,
1206         .pru_peeraddr =         in6_getpeeraddr,
1207         .pru_send =             icmp6_dgram_send,
1208         .pru_shutdown =         rip6_shutdown,
1209         .pru_sockaddr =         in6_getsockaddr,
1210         .pru_sosend =           sosend,
1211         .pru_soreceive =        soreceive,
1212 };