sys/netinet/raw_ip.c

   1 /*
   2  * Copyright (c) 1982, 1986, 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)raw_ip.c    8.7 (Berkeley) 5/15/95
  34  * $FreeBSD: src/sys/netinet/raw_ip.c,v 1.64.2.16 2003/08/24 08:24:38 hsu Exp $
  35  * $DragonFly: src/sys/netinet/raw_ip.c,v 1.23 2005/08/15 16:46:21 dillon Exp $
  36  */
  37
  38 #include "opt_inet6.h"
  39 #include "opt_ipsec.h"
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/kernel.h>
  44 #include <sys/malloc.h>
  45 #include <sys/mbuf.h>
  46 #include <sys/proc.h>
  47 #include <sys/protosw.h>
  48 #include <sys/socket.h>
  49 #include <sys/socketvar.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/thread2.h>
  52
  53 #include <machine/stdarg.h>
  54
  55 #include <vm/vm_zone.h>
  56
  57 #include <net/if.h>
  58 #include <net/route.h>
  59
  60 #define _IP_VHL
  61 #include <netinet/in.h>
  62 #include <netinet/in_systm.h>
  63 #include <netinet/ip.h>
  64 #include <netinet/in_pcb.h>
  65 #include <netinet/in_var.h>
  66 #include <netinet/ip_var.h>
  67
  68 #include <net/ip_mroute/ip_mroute.h>
  69 #include <net/ipfw/ip_fw.h>
  70 #include <net/dummynet/ip_dummynet.h>
  71
  72 #ifdef FAST_IPSEC
  73 #include <netproto/ipsec/ipsec.h>
  74 #endif /*FAST_IPSEC*/
  75
  76 #ifdef IPSEC
  77 #include <netinet6/ipsec.h>
  78 #endif /*IPSEC*/
  79
  80 struct  inpcbinfo ripcbinfo;
  81
  82 /* control hooks for ipfw and dummynet */
  83 ip_fw_ctl_t *ip_fw_ctl_ptr;
  84 ip_dn_ctl_t *ip_dn_ctl_ptr;
  85
  86 /*
  87  * hooks for multicast routing. They all default to NULL,
  88  * so leave them not initialized and rely on BSS being set to 0.
  89  */
  90
  91 /* The socket used to communicate with the multicast routing daemon.  */
  92 struct socket  *ip_mrouter;
  93
  94 /* The various mrouter and rsvp functions */
  95 int (*ip_mrouter_set)(struct socket *, struct sockopt *);
  96 int (*ip_mrouter_get)(struct socket *, struct sockopt *);
  97 int (*ip_mrouter_done)(void);
  98 int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
  99                 struct ip_moptions *);
 100 int (*mrt_ioctl)(int, caddr_t);
 101 int (*legal_vif_num)(int);
 102 u_long (*ip_mcast_src)(int);
 103
 104 void (*rsvp_input_p)(struct mbuf *m, ...);
 105 int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
 106 void (*ip_rsvp_force_done)(struct socket *);
 107
 108 /*
 109  * Nominal space allocated to a raw ip socket.
 110  */
 111 #define RIPSNDQ         8192
 112 #define RIPRCVQ         8192
 113
 114 /*
 115  * Raw interface to IP protocol.
 116  */
 117
 118 /*
 119  * Initialize raw connection block queue.
 120  */
 121 void
 122 rip_init(void)
 123 {
 124         in_pcbinfo_init(&ripcbinfo);
 125         /*
 126          * XXX We don't use the hash list for raw IP, but it's easier
 127          * to allocate a one entry hash list than it is to check all
 128          * over the place for hashbase == NULL.
 129          */
 130         ripcbinfo.hashbase = hashinit(1, M_PCB, &ripcbinfo.hashmask);
 131         ripcbinfo.porthashbase = hashinit(1, M_PCB, &ripcbinfo.porthashmask);
 132         ripcbinfo.wildcardhashbase = hashinit(1, M_PCB,
 133                                               &ripcbinfo.wildcardhashmask);
 134         ripcbinfo.ipi_zone = zinit("ripcb", sizeof(struct inpcb),
 135                                    maxsockets, ZONE_INTERRUPT, 0);
 136 }
 137
 138 /*
 139  * Setup generic address and protocol structures
 140  * for raw_input routine, then pass them along with
 141  * mbuf chain.
 142  */
 143 void
 144 rip_input(struct mbuf *m, ...)
 145 {
 146         struct sockaddr_in ripsrc = { sizeof ripsrc, AF_INET };
 147         struct ip *ip = mtod(m, struct ip *);
 148         struct inpcb *inp;
 149         struct inpcb *last = NULL;
 150         struct mbuf *opts = NULL;
 151         int off, proto;
 152         __va_list ap;
 153
 154         __va_start(ap, m);
 155         off = __va_arg(ap, int);
 156         proto = __va_arg(ap, int);
 157         __va_end(ap);
 158
 159         ripsrc.sin_addr = ip->ip_src;
 160         LIST_FOREACH(inp, &ripcbinfo.pcblisthead, inp_list) {
 161                 if (inp->inp_flags & INP_PLACEMARKER)
 162                         continue;
 163 #ifdef INET6
 164                 if ((inp->inp_vflag & INP_IPV4) == 0)
 165                         continue;
 166 #endif
 167                 if (inp->inp_ip_p && inp->inp_ip_p != proto)
 168                         continue;
 169                 if (inp->inp_laddr.s_addr != INADDR_ANY &&
 170                     inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
 171                         continue;
 172                 if (inp->inp_faddr.s_addr != INADDR_ANY &&
 173                     inp->inp_faddr.s_addr != ip->ip_src.s_addr)
 174                         continue;
 175                 if (last) {
 176                         struct mbuf *n = m_copypacket(m, MB_DONTWAIT);
 177
 178 #ifdef IPSEC
 179                         /* check AH/ESP integrity. */
 180                         if (n && ipsec4_in_reject_so(n, last->inp_socket)) {
 181                                 m_freem(n);
 182                                 ipsecstat.in_polvio++;
 183                                 /* do not inject data to pcb */
 184                         } else
 185 #endif /*IPSEC*/
 186 #ifdef FAST_IPSEC
 187                         /* check AH/ESP integrity. */
 188                         if (ipsec4_in_reject(n, last)) {
 189                                 m_freem(n);
 190                                 /* do not inject data to pcb */
 191                         } else
 192 #endif /*FAST_IPSEC*/
 193                         if (n) {
 194                                 if (last->inp_flags & INP_CONTROLOPTS ||
 195                                     last->inp_socket->so_options & SO_TIMESTAMP)
 196                                     ip_savecontrol(last, &opts, ip, n);
 197                                 if (sbappendaddr(&last->inp_socket->so_rcv,
 198                                     (struct sockaddr *)&ripsrc, n,
 199                                     opts) == 0) {
 200                                         /* should notify about lost packet */
 201                                         m_freem(n);
 202                                         if (opts)
 203                                             m_freem(opts);
 204                                 } else
 205                                         sorwakeup(last->inp_socket);
 206                                 opts = 0;
 207                         }
 208                 }
 209                 last = inp;
 210         }
 211 #ifdef IPSEC
 212         /* check AH/ESP integrity. */
 213         if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
 214                 m_freem(m);
 215                 ipsecstat.in_polvio++;
 216                 ipstat.ips_delivered--;
 217                 /* do not inject data to pcb */
 218         } else
 219 #endif /*IPSEC*/
 220 #ifdef FAST_IPSEC
 221         /* check AH/ESP integrity. */
 222         if (last && ipsec4_in_reject(m, last)) {
 223                 m_freem(m);
 224                 ipstat.ips_delivered--;
 225                 /* do not inject data to pcb */
 226         } else
 227 #endif /*FAST_IPSEC*/
 228         if (last) {
 229                 if (last->inp_flags & INP_CONTROLOPTS ||
 230                     last->inp_socket->so_options & SO_TIMESTAMP)
 231                         ip_savecontrol(last, &opts, ip, m);
 232                 if (sbappendaddr(&last->inp_socket->so_rcv,
 233                     (struct sockaddr *)&ripsrc, m, opts) == 0) {
 234                         m_freem(m);
 235                         if (opts)
 236                             m_freem(opts);
 237                 } else
 238                         sorwakeup(last->inp_socket);
 239         } else {
 240                 m_freem(m);
 241                 ipstat.ips_noproto++;
 242                 ipstat.ips_delivered--;
 243         }
 244 }
 245
 246 /*
 247  * Generate IP header and pass packet to ip_output.
 248  * Tack on options user may have setup with control call.
 249  */
 250 int
 251 rip_output(struct mbuf *m, struct socket *so, ...)
 252 {
 253         struct ip *ip;
 254         struct inpcb *inp = so->so_pcb;
 255         __va_list ap;
 256         int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
 257         u_long dst;
 258
 259         __va_start(ap, so);
 260         dst = __va_arg(ap, u_long);
 261         __va_end(ap);
 262
 263         /*
 264          * If the user handed us a complete IP packet, use it.
 265          * Otherwise, allocate an mbuf for a header and fill it in.
 266          */
 267         if ((inp->inp_flags & INP_HDRINCL) == 0) {
 268                 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
 269                         m_freem(m);
 270                         return(EMSGSIZE);
 271                 }
 272                 M_PREPEND(m, sizeof(struct ip), MB_WAIT);
 273                 if (m == NULL)
 274                         return(ENOBUFS);
 275                 ip = mtod(m, struct ip *);
 276                 ip->ip_tos = inp->inp_ip_tos;
 277                 ip->ip_off = 0;
 278                 ip->ip_p = inp->inp_ip_p;
 279                 ip->ip_len = m->m_pkthdr.len;
 280                 ip->ip_src = inp->inp_laddr;
 281                 ip->ip_dst.s_addr = dst;
 282                 ip->ip_ttl = inp->inp_ip_ttl;
 283         } else {
 284                 if (m->m_pkthdr.len > IP_MAXPACKET) {
 285                         m_freem(m);
 286                         return(EMSGSIZE);
 287                 }
 288                 ip = mtod(m, struct ip *);
 289                 /* don't allow both user specified and setsockopt options,
 290                    and don't allow packet length sizes that will crash */
 291                 if (((IP_VHL_HL(ip->ip_vhl) != (sizeof (*ip) >> 2)) &&
 292                      inp->inp_options) ||
 293                     (ip->ip_len > m->m_pkthdr.len) ||
 294                     (ip->ip_len < (IP_VHL_HL(ip->ip_vhl) << 2))) {
 295                         m_freem(m);
 296                         return EINVAL;
 297                 }
 298                 if (ip->ip_id == 0)
 299                         ip->ip_id = ip_newid();
 300                 /* XXX prevent ip_output from overwriting header fields */
 301                 flags |= IP_RAWOUTPUT;
 302                 ipstat.ips_rawout++;
 303         }
 304
 305         return (ip_output(m, inp->inp_options, &inp->inp_route, flags,
 306                           inp->inp_moptions, inp));
 307 }
 308
 309 /*
 310  * Raw IP socket option processing.
 311  */
 312 int
 313 rip_ctloutput(struct socket *so, struct sockopt *sopt)
 314 {
 315         struct  inpcb *inp = so->so_pcb;
 316         int     error, optval;
 317
 318         if (sopt->sopt_level != IPPROTO_IP)
 319                 return (EINVAL);
 320
 321         error = 0;
 322
 323         switch (sopt->sopt_dir) {
 324         case SOPT_GET:
 325                 switch (sopt->sopt_name) {
 326                 case IP_HDRINCL:
 327                         optval = inp->inp_flags & INP_HDRINCL;
 328                         error = sooptcopyout(sopt, &optval, sizeof optval);
 329                         break;
 330
 331                 case IP_FW_ADD: /* ADD actually returns the body... */
 332                 case IP_FW_GET:
 333                         if (IPFW_LOADED)
 334                                 error = ip_fw_ctl_ptr(sopt);
 335                         else
 336                                 error = ENOPROTOOPT;
 337                         break;
 338
 339                 case IP_DUMMYNET_GET:
 340                         if (DUMMYNET_LOADED)
 341                                 error = ip_dn_ctl_ptr(sopt);
 342                         else
 343                                 error = ENOPROTOOPT;
 344                         break ;
 345
 346                 case MRT_INIT:
 347                 case MRT_DONE:
 348                 case MRT_ADD_VIF:
 349                 case MRT_DEL_VIF:
 350                 case MRT_ADD_MFC:
 351                 case MRT_DEL_MFC:
 352                 case MRT_VERSION:
 353                 case MRT_ASSERT:
 354                 case MRT_API_SUPPORT:
 355                 case MRT_API_CONFIG:
 356                 case MRT_ADD_BW_UPCALL:
 357                 case MRT_DEL_BW_UPCALL:
 358                         error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
 359                                 EOPNOTSUPP;
 360                         break;
 361
 362                 default:
 363                         error = ip_ctloutput(so, sopt);
 364                         break;
 365                 }
 366                 break;
 367
 368         case SOPT_SET:
 369                 switch (sopt->sopt_name) {
 370                 case IP_HDRINCL:
 371                         error = sooptcopyin(sopt, &optval, sizeof optval,
 372                                             sizeof optval);
 373                         if (error)
 374                                 break;
 375                         if (optval)
 376                                 inp->inp_flags |= INP_HDRINCL;
 377                         else
 378                                 inp->inp_flags &= ~INP_HDRINCL;
 379                         break;
 380
 381                 case IP_FW_ADD:
 382                 case IP_FW_DEL:
 383                 case IP_FW_FLUSH:
 384                 case IP_FW_ZERO:
 385                 case IP_FW_RESETLOG:
 386                         if (IPFW_LOADED)
 387                                 error = ip_fw_ctl_ptr(sopt);
 388                         else
 389                                 error = ENOPROTOOPT;
 390                         break;
 391
 392                 case IP_DUMMYNET_CONFIGURE:
 393                 case IP_DUMMYNET_DEL:
 394                 case IP_DUMMYNET_FLUSH:
 395                         if (DUMMYNET_LOADED)
 396                                 error = ip_dn_ctl_ptr(sopt);
 397                         else
 398                                 error = ENOPROTOOPT ;
 399                         break ;
 400
 401                 case IP_RSVP_ON:
 402                         error = ip_rsvp_init(so);
 403                         break;
 404
 405                 case IP_RSVP_OFF:
 406                         error = ip_rsvp_done();
 407                         break;
 408
 409                 case IP_RSVP_VIF_ON:
 410                 case IP_RSVP_VIF_OFF:
 411                         error = ip_rsvp_vif ?
 412                                 ip_rsvp_vif(so, sopt) : EINVAL;
 413                         break;
 414
 415                 case MRT_INIT:
 416                 case MRT_DONE:
 417                 case MRT_ADD_VIF:
 418                 case MRT_DEL_VIF:
 419                 case MRT_ADD_MFC:
 420                 case MRT_DEL_MFC:
 421                 case MRT_VERSION:
 422                 case MRT_ASSERT:
 423                 case MRT_API_SUPPORT:
 424                 case MRT_API_CONFIG:
 425                 case MRT_ADD_BW_UPCALL:
 426                 case MRT_DEL_BW_UPCALL:
 427                         error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
 428                                         EOPNOTSUPP;
 429                         break;
 430
 431                 default:
 432                         error = ip_ctloutput(so, sopt);
 433                         break;
 434                 }
 435                 break;
 436         }
 437
 438         return (error);
 439 }
 440
 441 /*
 442  * This function exists solely to receive the PRC_IFDOWN messages which
 443  * are sent by if_down().  It looks for an ifaddr whose ifa_addr is sa,
 444  * and calls in_ifadown() to remove all routes corresponding to that address.
 445  * It also receives the PRC_IFUP messages from if_up() and reinstalls the
 446  * interface routes.
 447  */
 448 void
 449 rip_ctlinput(int cmd, struct sockaddr *sa, void *vip)
 450 {
 451         struct in_ifaddr *ia;
 452         struct ifnet *ifp;
 453         int err;
 454         int flags;
 455
 456         switch (cmd) {
 457         case PRC_IFDOWN:
 458                 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) {
 459                         if (ia->ia_ifa.ifa_addr == sa &&
 460                             (ia->ia_flags & IFA_ROUTE)) {
 461                                 /*
 462                                  * in_ifscrub kills the interface route.
 463                                  */
 464                                 in_ifscrub(ia->ia_ifp, ia);
 465                                 /*
 466                                  * in_ifadown gets rid of all the rest of
 467                                  * the routes.  This is not quite the right
 468                                  * thing to do, but at least if we are running
 469                                  * a routing process they will come back.
 470                                  */
 471                                 in_ifadown(&ia->ia_ifa, 0);
 472                                 break;
 473                         }
 474                 }
 475                 break;
 476
 477         case PRC_IFUP:
 478                 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) {
 479                         if (ia->ia_ifa.ifa_addr == sa)
 480                                 break;
 481                 }
 482                 if (ia == 0 || (ia->ia_flags & IFA_ROUTE))
 483                         return;
 484                 flags = RTF_UP;
 485                 ifp = ia->ia_ifa.ifa_ifp;
 486
 487                 if ((ifp->if_flags & IFF_LOOPBACK) ||
 488                     (ifp->if_flags & IFF_POINTOPOINT))
 489                         flags |= RTF_HOST;
 490
 491                 err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
 492                 if (err == 0)
 493                         ia->ia_flags |= IFA_ROUTE;
 494                 break;
 495         }
 496 }
 497
 498 u_long  rip_sendspace = RIPSNDQ;
 499 u_long  rip_recvspace = RIPRCVQ;
 500
 501 SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
 502     &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
 503 SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
 504     &rip_recvspace, 0, "Maximum incoming raw IP datagram size");
 505
 506 static int
 507 rip_attach(struct socket *so, int proto, struct pru_attach_info *ai)
 508 {
 509         struct inpcb *inp;
 510         int error;
 511
 512         inp = so->so_pcb;
 513         if (inp)
 514                 panic("rip_attach");
 515         if ((error = suser_cred(ai->p_ucred, NULL_CRED_OKAY)) != 0)
 516                 return error;
 517
 518         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 519         if (error)
 520                 return error;
 521         crit_enter();
 522         error = in_pcballoc(so, &ripcbinfo);
 523         crit_exit();
 524         if (error)
 525                 return error;
 526         inp = (struct inpcb *)so->so_pcb;
 527         inp->inp_vflag |= INP_IPV4;
 528         inp->inp_ip_p = proto;
 529         inp->inp_ip_ttl = ip_defttl;
 530         return 0;
 531 }
 532
 533 static int
 534 rip_detach(struct socket *so)
 535 {
 536         struct inpcb *inp;
 537
 538         inp = so->so_pcb;
 539         if (inp == 0)
 540                 panic("rip_detach");
 541         if (so == ip_mrouter && ip_mrouter_done)
 542                 ip_mrouter_done();
 543         if (ip_rsvp_force_done)
 544                 ip_rsvp_force_done(so);
 545         if (so == ip_rsvpd)
 546                 ip_rsvp_done();
 547         in_pcbdetach(inp);
 548         return 0;
 549 }
 550
 551 static int
 552 rip_abort(struct socket *so)
 553 {
 554         soisdisconnected(so);
 555         if (so->so_state & SS_NOFDREF)
 556                 return rip_detach(so);
 557         return 0;
 558 }
 559
 560 static int
 561 rip_disconnect(struct socket *so)
 562 {
 563         if ((so->so_state & SS_ISCONNECTED) == 0)
 564                 return ENOTCONN;
 565         return rip_abort(so);
 566 }
 567
 568 static int
 569 rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 570 {
 571         struct inpcb *inp = so->so_pcb;
 572         struct sockaddr_in *addr = (struct sockaddr_in *)nam;
 573
 574         if (nam->sa_len != sizeof(*addr))
 575                 return EINVAL;
 576
 577         if (TAILQ_EMPTY(&ifnet) || ((addr->sin_family != AF_INET) &&
 578                                     (addr->sin_family != AF_IMPLINK)) ||
 579             (addr->sin_addr.s_addr != INADDR_ANY &&
 580              ifa_ifwithaddr((struct sockaddr *)addr) == 0))
 581                 return EADDRNOTAVAIL;
 582         inp->inp_laddr = addr->sin_addr;
 583         return 0;
 584 }
 585
 586 static int
 587 rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 588 {
 589         struct inpcb *inp = so->so_pcb;
 590         struct sockaddr_in *addr = (struct sockaddr_in *)nam;
 591
 592         if (nam->sa_len != sizeof(*addr))
 593                 return EINVAL;
 594         if (TAILQ_EMPTY(&ifnet))
 595                 return EADDRNOTAVAIL;
 596         if ((addr->sin_family != AF_INET) &&
 597             (addr->sin_family != AF_IMPLINK))
 598                 return EAFNOSUPPORT;
 599         inp->inp_faddr = addr->sin_addr;
 600         soisconnected(so);
 601         return 0;
 602 }
 603
 604 static int
 605 rip_shutdown(struct socket *so)
 606 {
 607         socantsendmore(so);
 608         return 0;
 609 }
 610
 611 static int
 612 rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
 613          struct mbuf *control, struct thread *td)
 614 {
 615         struct inpcb *inp = so->so_pcb;
 616         u_long dst;
 617
 618         if (so->so_state & SS_ISCONNECTED) {
 619                 if (nam) {
 620                         m_freem(m);
 621                         return EISCONN;
 622                 }
 623                 dst = inp->inp_faddr.s_addr;
 624         } else {
 625                 if (nam == NULL) {
 626                         m_freem(m);
 627                         return ENOTCONN;
 628                 }
 629                 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
 630         }
 631         return rip_output(m, so, dst);
 632 }
 633
 634 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, &ripcbinfo, 0,
 635             in_pcblist_global, "S,xinpcb", "List of active raw IP sockets");
 636
 637 struct pr_usrreqs rip_usrreqs = {
 638         rip_abort, pru_accept_notsupp, rip_attach, rip_bind, rip_connect,
 639         pru_connect2_notsupp, in_control, rip_detach, rip_disconnect,
 640         pru_listen_notsupp, in_setpeeraddr, pru_rcvd_notsupp,
 641         pru_rcvoob_notsupp, rip_send, pru_sense_null, rip_shutdown,
 642         in_setsockaddr, sosend, soreceive, sopoll
 643 };