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 1.33 2008/10/28 03:07:28 sephe 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/jail.h>
  45 #include <sys/malloc.h>
  46 #include <sys/mbuf.h>
  47 #include <sys/proc.h>
  48 #include <sys/priv.h>
  49 #include <sys/protosw.h>
  50 #include <sys/socket.h>
  51 #include <sys/socketvar.h>
  52 #include <sys/sysctl.h>
  53 #include <sys/thread2.h>
  54
  55 #include <machine/stdarg.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_size = sizeof(struct inpcb);
 135 }
 136
 137 /*
 138  * Setup generic address and protocol structures
 139  * for raw_input routine, then pass them along with
 140  * mbuf chain.
 141  */
 142 void
 143 rip_input(struct mbuf *m, ...)
 144 {
 145         struct sockaddr_in ripsrc = { sizeof ripsrc, AF_INET };
 146         struct ip *ip = mtod(m, struct ip *);
 147         struct inpcb *inp;
 148         struct inpcb *last = NULL;
 149         struct mbuf *opts = NULL;
 150         int off, proto;
 151         __va_list ap;
 152
 153         __va_start(ap, m);
 154         off = __va_arg(ap, int);
 155         proto = __va_arg(ap, int);
 156         __va_end(ap);
 157
 158         ripsrc.sin_addr = ip->ip_src;
 159         LIST_FOREACH(inp, &ripcbinfo.pcblisthead, inp_list) {
 160                 if (inp->inp_flags & INP_PLACEMARKER)
 161                         continue;
 162 #ifdef INET6
 163                 if ((inp->inp_vflag & INP_IPV4) == 0)
 164                         continue;
 165 #endif
 166                 if (inp->inp_ip_p && inp->inp_ip_p != proto)
 167                         continue;
 168                 if (inp->inp_laddr.s_addr != INADDR_ANY &&
 169                     inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
 170                         continue;
 171                 if (inp->inp_faddr.s_addr != INADDR_ANY &&
 172                     inp->inp_faddr.s_addr != ip->ip_src.s_addr)
 173                         continue;
 174                 if (last) {
 175                         struct mbuf *n = m_copypacket(m, MB_DONTWAIT);
 176
 177 #ifdef IPSEC
 178                         /* check AH/ESP integrity. */
 179                         if (n && ipsec4_in_reject_so(n, last->inp_socket)) {
 180                                 m_freem(n);
 181                                 ipsecstat.in_polvio++;
 182                                 /* do not inject data to pcb */
 183                         } else
 184 #endif /*IPSEC*/
 185 #ifdef FAST_IPSEC
 186                         /* check AH/ESP integrity. */
 187                         if (ipsec4_in_reject(n, last)) {
 188                                 m_freem(n);
 189                                 /* do not inject data to pcb */
 190                         } else
 191 #endif /*FAST_IPSEC*/
 192                         if (n) {
 193                                 if (last->inp_flags & INP_CONTROLOPTS ||
 194                                     last->inp_socket->so_options & SO_TIMESTAMP)
 195                                     ip_savecontrol(last, &opts, ip, n);
 196                                 if (ssb_appendaddr(&last->inp_socket->so_rcv,
 197                                     (struct sockaddr *)&ripsrc, n,
 198                                     opts) == 0) {
 199                                         /* should notify about lost packet */
 200                                         m_freem(n);
 201                                         if (opts)
 202                                             m_freem(opts);
 203                                 } else
 204                                         sorwakeup(last->inp_socket);
 205                                 opts = 0;
 206                         }
 207                 }
 208                 last = inp;
 209         }
 210 #ifdef IPSEC
 211         /* check AH/ESP integrity. */
 212         if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
 213                 m_freem(m);
 214                 ipsecstat.in_polvio++;
 215                 ipstat.ips_delivered--;
 216                 /* do not inject data to pcb */
 217         } else
 218 #endif /*IPSEC*/
 219 #ifdef FAST_IPSEC
 220         /* check AH/ESP integrity. */
 221         if (last && ipsec4_in_reject(m, last)) {
 222                 m_freem(m);
 223                 ipstat.ips_delivered--;
 224                 /* do not inject data to pcb */
 225         } else
 226 #endif /*FAST_IPSEC*/
 227         /* Check the minimum TTL for socket. */
 228         if (last && ip->ip_ttl < last->inp_ip_minttl) {
 229                 m_freem(opts);
 230                 ipstat.ips_delivered--;
 231         } else if (last) {
 232                 if (last->inp_flags & INP_CONTROLOPTS ||
 233                     last->inp_socket->so_options & SO_TIMESTAMP)
 234                         ip_savecontrol(last, &opts, ip, m);
 235                 if (ssb_appendaddr(&last->inp_socket->so_rcv,
 236                     (struct sockaddr *)&ripsrc, m, opts) == 0) {
 237                         m_freem(m);
 238                         if (opts)
 239                             m_freem(opts);
 240                 } else
 241                         sorwakeup(last->inp_socket);
 242         } else {
 243                 m_freem(m);
 244                 ipstat.ips_noproto++;
 245                 ipstat.ips_delivered--;
 246         }
 247 }
 248
 249 /*
 250  * Generate IP header and pass packet to ip_output.
 251  * Tack on options user may have setup with control call.
 252  */
 253 int
 254 rip_output(struct mbuf *m, struct socket *so, ...)
 255 {
 256         struct ip *ip;
 257         struct inpcb *inp = so->so_pcb;
 258         __va_list ap;
 259         int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
 260         u_long dst;
 261
 262         __va_start(ap, so);
 263         dst = __va_arg(ap, u_long);
 264         __va_end(ap);
 265
 266         /*
 267          * If the user handed us a complete IP packet, use it.
 268          * Otherwise, allocate an mbuf for a header and fill it in.
 269          */
 270         if ((inp->inp_flags & INP_HDRINCL) == 0) {
 271                 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
 272                         m_freem(m);
 273                         return(EMSGSIZE);
 274                 }
 275                 M_PREPEND(m, sizeof(struct ip), MB_WAIT);
 276                 if (m == NULL)
 277                         return(ENOBUFS);
 278                 ip = mtod(m, struct ip *);
 279                 ip->ip_tos = inp->inp_ip_tos;
 280                 ip->ip_off = 0;
 281                 ip->ip_p = inp->inp_ip_p;
 282                 ip->ip_len = m->m_pkthdr.len;
 283                 ip->ip_src = inp->inp_laddr;
 284                 ip->ip_dst.s_addr = dst;
 285                 ip->ip_ttl = inp->inp_ip_ttl;
 286         } else {
 287                 int hlen;
 288
 289                 if (m->m_pkthdr.len > IP_MAXPACKET) {
 290                         m_freem(m);
 291                         return(EMSGSIZE);
 292                 }
 293                 if (m->m_len < sizeof(struct ip)) {
 294                         m = m_pullup(m, sizeof(struct ip));
 295                         if (m == NULL)
 296                                 return ENOBUFS;
 297                 }
 298                 ip = mtod(m, struct ip *);
 299                 hlen = IP_VHL_HL(ip->ip_vhl) << 2;
 300
 301                 /* Don't allow header length less than the minimum. */
 302                 if (hlen < sizeof(struct ip)) {
 303                         m_freem(m);
 304                         return EINVAL;
 305                 }
 306
 307                 /*
 308                  * Don't allow both user specified and setsockopt options.
 309                  * Don't allow packet length sizes that will crash.
 310                  */
 311                 if ((hlen != sizeof(struct ip) && inp->inp_options) ||
 312                     ip->ip_len > m->m_pkthdr.len || ip->ip_len < hlen) {
 313                         m_freem(m);
 314                         return EINVAL;
 315                 }
 316                 if (ip->ip_id == 0)
 317                         ip->ip_id = ip_newid();
 318
 319                 /* Prevent ip_output from overwriting header fields */
 320                 flags |= IP_RAWOUTPUT;
 321                 ipstat.ips_rawout++;
 322         }
 323
 324         return ip_output(m, inp->inp_options, &inp->inp_route, flags,
 325                          inp->inp_moptions, inp);
 326 }
 327
 328 /*
 329  * Raw IP socket option processing.
 330  */
 331 int
 332 rip_ctloutput(struct socket *so, struct sockopt *sopt)
 333 {
 334         struct  inpcb *inp = so->so_pcb;
 335         int     error, optval;
 336
 337         if (sopt->sopt_level != IPPROTO_IP)
 338                 return (EINVAL);
 339
 340         error = 0;
 341
 342         switch (sopt->sopt_dir) {
 343         case SOPT_GET:
 344                 switch (sopt->sopt_name) {
 345                 case IP_HDRINCL:
 346                         optval = inp->inp_flags & INP_HDRINCL;
 347                         soopt_from_kbuf(sopt, &optval, sizeof optval);
 348                         break;
 349
 350                 case IP_FW_ADD: /* ADD actually returns the body... */
 351                 case IP_FW_GET:
 352                         if (IPFW_LOADED)
 353                                 error = ip_fw_sockopt(sopt);
 354                         else
 355                                 error = ENOPROTOOPT;
 356                         break;
 357
 358                 case IP_DUMMYNET_GET:
 359                         error = ip_dn_sockopt(sopt);
 360                         break ;
 361
 362                 case MRT_INIT:
 363                 case MRT_DONE:
 364                 case MRT_ADD_VIF:
 365                 case MRT_DEL_VIF:
 366                 case MRT_ADD_MFC:
 367                 case MRT_DEL_MFC:
 368                 case MRT_VERSION:
 369                 case MRT_ASSERT:
 370                 case MRT_API_SUPPORT:
 371                 case MRT_API_CONFIG:
 372                 case MRT_ADD_BW_UPCALL:
 373                 case MRT_DEL_BW_UPCALL:
 374                         error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
 375                                 EOPNOTSUPP;
 376                         break;
 377
 378                 default:
 379                         error = ip_ctloutput(so, sopt);
 380                         break;
 381                 }
 382                 break;
 383
 384         case SOPT_SET:
 385                 switch (sopt->sopt_name) {
 386                 case IP_HDRINCL:
 387                         error = soopt_to_kbuf(sopt, &optval, sizeof optval,
 388                                               sizeof optval);
 389                         if (error)
 390                                 break;
 391                         if (optval)
 392                                 inp->inp_flags |= INP_HDRINCL;
 393                         else
 394                                 inp->inp_flags &= ~INP_HDRINCL;
 395                         break;
 396
 397                 case IP_FW_ADD:
 398                 case IP_FW_DEL:
 399                 case IP_FW_FLUSH:
 400                 case IP_FW_ZERO:
 401                 case IP_FW_RESETLOG:
 402                         if (IPFW_LOADED)
 403                                 error = ip_fw_ctl_ptr(sopt);
 404                         else
 405                                 error = ENOPROTOOPT;
 406                         break;
 407
 408                 case IP_DUMMYNET_CONFIGURE:
 409                 case IP_DUMMYNET_DEL:
 410                 case IP_DUMMYNET_FLUSH:
 411                         error = ip_dn_sockopt(sopt);
 412                         break ;
 413
 414                 case IP_RSVP_ON:
 415                         error = ip_rsvp_init(so);
 416                         break;
 417
 418                 case IP_RSVP_OFF:
 419                         error = ip_rsvp_done();
 420                         break;
 421
 422                 case IP_RSVP_VIF_ON:
 423                 case IP_RSVP_VIF_OFF:
 424                         error = ip_rsvp_vif ?
 425                                 ip_rsvp_vif(so, sopt) : EINVAL;
 426                         break;
 427
 428                 case MRT_INIT:
 429                 case MRT_DONE:
 430                 case MRT_ADD_VIF:
 431                 case MRT_DEL_VIF:
 432                 case MRT_ADD_MFC:
 433                 case MRT_DEL_MFC:
 434                 case MRT_VERSION:
 435                 case MRT_ASSERT:
 436                 case MRT_API_SUPPORT:
 437                 case MRT_API_CONFIG:
 438                 case MRT_ADD_BW_UPCALL:
 439                 case MRT_DEL_BW_UPCALL:
 440                         error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
 441                                         EOPNOTSUPP;
 442                         break;
 443
 444                 default:
 445                         error = ip_ctloutput(so, sopt);
 446                         break;
 447                 }
 448                 break;
 449         }
 450
 451         return (error);
 452 }
 453
 454 /*
 455  * This function exists solely to receive the PRC_IFDOWN messages which
 456  * are sent by if_down().  It looks for an ifaddr whose ifa_addr is sa,
 457  * and calls in_ifadown() to remove all routes corresponding to that address.
 458  * It also receives the PRC_IFUP messages from if_up() and reinstalls the
 459  * interface routes.
 460  */
 461 void
 462 rip_ctlinput(int cmd, struct sockaddr *sa, void *vip)
 463 {
 464         struct in_ifaddr *ia;
 465         struct in_ifaddr_container *iac;
 466         struct ifnet *ifp;
 467         int err;
 468         int flags;
 469
 470         switch (cmd) {
 471         case PRC_IFDOWN:
 472                 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
 473                         ia = iac->ia;
 474
 475                         if (ia->ia_ifa.ifa_addr == sa &&
 476                             (ia->ia_flags & IFA_ROUTE)) {
 477                                 /*
 478                                  * in_ifscrub kills the interface route.
 479                                  */
 480                                 in_ifscrub(ia->ia_ifp, ia);
 481                                 /*
 482                                  * in_ifadown gets rid of all the rest of
 483                                  * the routes.  This is not quite the right
 484                                  * thing to do, but at least if we are running
 485                                  * a routing process they will come back.
 486                                  */
 487                                 in_ifadown(&ia->ia_ifa, 0);
 488                                 break;
 489                         }
 490                 }
 491                 break;
 492
 493         case PRC_IFUP:
 494                 ia = NULL;
 495                 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
 496                         if (iac->ia->ia_ifa.ifa_addr == sa) {
 497                                 ia = iac->ia;
 498                                 break;
 499                         }
 500                 }
 501                 if (ia == NULL || (ia->ia_flags & IFA_ROUTE))
 502                         return;
 503                 flags = RTF_UP;
 504                 ifp = ia->ia_ifa.ifa_ifp;
 505
 506                 if ((ifp->if_flags & IFF_LOOPBACK) ||
 507                     (ifp->if_flags & IFF_POINTOPOINT))
 508                         flags |= RTF_HOST;
 509
 510                 err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
 511                 if (err == 0)
 512                         ia->ia_flags |= IFA_ROUTE;
 513                 break;
 514         }
 515 }
 516
 517 u_long  rip_sendspace = RIPSNDQ;
 518 u_long  rip_recvspace = RIPRCVQ;
 519
 520 SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
 521     &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
 522 SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
 523     &rip_recvspace, 0, "Maximum incoming raw IP datagram size");
 524
 525 static int
 526 rip_attach(struct socket *so, int proto, struct pru_attach_info *ai)
 527 {
 528         struct inpcb *inp;
 529         int error;
 530
 531         inp = so->so_pcb;
 532         if (inp)
 533                 panic("rip_attach");
 534         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
 535         if (error)
 536                 return error;
 537
 538         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 539         if (error)
 540                 return error;
 541         crit_enter();
 542         error = in_pcballoc(so, &ripcbinfo);
 543         crit_exit();
 544         if (error)
 545                 return error;
 546         inp = (struct inpcb *)so->so_pcb;
 547         inp->inp_vflag |= INP_IPV4;
 548         inp->inp_ip_p = proto;
 549         inp->inp_ip_ttl = ip_defttl;
 550         return 0;
 551 }
 552
 553 static int
 554 rip_detach(struct socket *so)
 555 {
 556         struct inpcb *inp;
 557
 558         inp = so->so_pcb;
 559         if (inp == 0)
 560                 panic("rip_detach");
 561         if (so == ip_mrouter && ip_mrouter_done)
 562                 ip_mrouter_done();
 563         if (ip_rsvp_force_done)
 564                 ip_rsvp_force_done(so);
 565         if (so == ip_rsvpd)
 566                 ip_rsvp_done();
 567         in_pcbdetach(inp);
 568         return 0;
 569 }
 570
 571 static int
 572 rip_abort(struct socket *so)
 573 {
 574         soisdisconnected(so);
 575         if (so->so_state & SS_NOFDREF)
 576                 return rip_detach(so);
 577         return 0;
 578 }
 579
 580 static int
 581 rip_disconnect(struct socket *so)
 582 {
 583         if ((so->so_state & SS_ISCONNECTED) == 0)
 584                 return ENOTCONN;
 585         return rip_abort(so);
 586 }
 587
 588 static int
 589 rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 590 {
 591         struct inpcb *inp = so->so_pcb;
 592         struct sockaddr_in *addr = (struct sockaddr_in *)nam;
 593
 594         if (nam->sa_len != sizeof(*addr))
 595                 return EINVAL;
 596
 597         if (TAILQ_EMPTY(&ifnet) || ((addr->sin_family != AF_INET) &&
 598                                     (addr->sin_family != AF_IMPLINK)) ||
 599             (addr->sin_addr.s_addr != INADDR_ANY &&
 600              ifa_ifwithaddr((struct sockaddr *)addr) == 0))
 601                 return EADDRNOTAVAIL;
 602         inp->inp_laddr = addr->sin_addr;
 603         return 0;
 604 }
 605
 606 static int
 607 rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 608 {
 609         struct inpcb *inp = so->so_pcb;
 610         struct sockaddr_in *addr = (struct sockaddr_in *)nam;
 611
 612         if (nam->sa_len != sizeof(*addr))
 613                 return EINVAL;
 614         if (TAILQ_EMPTY(&ifnet))
 615                 return EADDRNOTAVAIL;
 616         if ((addr->sin_family != AF_INET) &&
 617             (addr->sin_family != AF_IMPLINK))
 618                 return EAFNOSUPPORT;
 619         inp->inp_faddr = addr->sin_addr;
 620         soisconnected(so);
 621         return 0;
 622 }
 623
 624 static int
 625 rip_shutdown(struct socket *so)
 626 {
 627         socantsendmore(so);
 628         return 0;
 629 }
 630
 631 static int
 632 rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
 633          struct mbuf *control, struct thread *td)
 634 {
 635         struct inpcb *inp = so->so_pcb;
 636         u_long dst;
 637
 638         if (so->so_state & SS_ISCONNECTED) {
 639                 if (nam) {
 640                         m_freem(m);
 641                         return EISCONN;
 642                 }
 643                 dst = inp->inp_faddr.s_addr;
 644         } else {
 645                 if (nam == NULL) {
 646                         m_freem(m);
 647                         return ENOTCONN;
 648                 }
 649                 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
 650         }
 651         return rip_output(m, so, dst);
 652 }
 653
 654 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, &ripcbinfo, 0,
 655             in_pcblist_global, "S,xinpcb", "List of active raw IP sockets");
 656
 657 struct pr_usrreqs rip_usrreqs = {
 658         .pru_abort = rip_abort,
 659         .pru_accept = pru_accept_notsupp,
 660         .pru_attach = rip_attach,
 661         .pru_bind = rip_bind,
 662         .pru_connect = rip_connect,
 663         .pru_connect2 = pru_connect2_notsupp,
 664         .pru_control = in_control,
 665         .pru_detach = rip_detach,
 666         .pru_disconnect = rip_disconnect,
 667         .pru_listen = pru_listen_notsupp,
 668         .pru_peeraddr = in_setpeeraddr,
 669         .pru_rcvd = pru_rcvd_notsupp,
 670         .pru_rcvoob = pru_rcvoob_notsupp,
 671         .pru_send = rip_send,
 672         .pru_sense = pru_sense_null,
 673         .pru_shutdown = rip_shutdown,
 674         .pru_sockaddr = in_setsockaddr,
 675         .pru_sosend = sosend,
 676         .pru_soreceive = soreceive,
 677         .pru_sopoll = sopoll
 678 };