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 <vm/vm_zone.h>
  58
  59 #include <net/if.h>
  60 #include <net/route.h>
  61
  62 #define _IP_VHL
  63 #include <netinet/in.h>
  64 #include <netinet/in_systm.h>
  65 #include <netinet/ip.h>
  66 #include <netinet/in_pcb.h>
  67 #include <netinet/in_var.h>
  68 #include <netinet/ip_var.h>
  69
  70 #include <net/ip_mroute/ip_mroute.h>
  71 #include <net/ipfw/ip_fw.h>
  72 #include <net/dummynet/ip_dummynet.h>
  73
  74 #ifdef FAST_IPSEC
  75 #include <netproto/ipsec/ipsec.h>
  76 #endif /*FAST_IPSEC*/
  77
  78 #ifdef IPSEC
  79 #include <netinet6/ipsec.h>
  80 #endif /*IPSEC*/
  81
  82 struct  inpcbinfo ripcbinfo;
  83
  84 /* control hooks for ipfw and dummynet */
  85 ip_fw_ctl_t *ip_fw_ctl_ptr;
  86 ip_dn_ctl_t *ip_dn_ctl_ptr;
  87
  88 /*
  89  * hooks for multicast routing. They all default to NULL,
  90  * so leave them not initialized and rely on BSS being set to 0.
  91  */
  92
  93 /* The socket used to communicate with the multicast routing daemon.  */
  94 struct socket  *ip_mrouter;
  95
  96 /* The various mrouter and rsvp functions */
  97 int (*ip_mrouter_set)(struct socket *, struct sockopt *);
  98 int (*ip_mrouter_get)(struct socket *, struct sockopt *);
  99 int (*ip_mrouter_done)(void);
 100 int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
 101                 struct ip_moptions *);
 102 int (*mrt_ioctl)(int, caddr_t);
 103 int (*legal_vif_num)(int);
 104 u_long (*ip_mcast_src)(int);
 105
 106 void (*rsvp_input_p)(struct mbuf *m, ...);
 107 int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
 108 void (*ip_rsvp_force_done)(struct socket *);
 109
 110 /*
 111  * Nominal space allocated to a raw ip socket.
 112  */
 113 #define RIPSNDQ         8192
 114 #define RIPRCVQ         8192
 115
 116 /*
 117  * Raw interface to IP protocol.
 118  */
 119
 120 /*
 121  * Initialize raw connection block queue.
 122  */
 123 void
 124 rip_init(void)
 125 {
 126         in_pcbinfo_init(&ripcbinfo);
 127         /*
 128          * XXX We don't use the hash list for raw IP, but it's easier
 129          * to allocate a one entry hash list than it is to check all
 130          * over the place for hashbase == NULL.
 131          */
 132         ripcbinfo.hashbase = hashinit(1, M_PCB, &ripcbinfo.hashmask);
 133         ripcbinfo.porthashbase = hashinit(1, M_PCB, &ripcbinfo.porthashmask);
 134         ripcbinfo.wildcardhashbase = hashinit(1, M_PCB,
 135                                               &ripcbinfo.wildcardhashmask);
 136         ripcbinfo.ipi_zone = zinit("ripcb", sizeof(struct inpcb),
 137                                    maxsockets, ZONE_INTERRUPT, 0);
 138 }
 139
 140 /*
 141  * Setup generic address and protocol structures
 142  * for raw_input routine, then pass them along with
 143  * mbuf chain.
 144  */
 145 void
 146 rip_input(struct mbuf *m, ...)
 147 {
 148         struct sockaddr_in ripsrc = { sizeof ripsrc, AF_INET };
 149         struct ip *ip = mtod(m, struct ip *);
 150         struct inpcb *inp;
 151         struct inpcb *last = NULL;
 152         struct mbuf *opts = NULL;
 153         int off, proto;
 154         __va_list ap;
 155
 156         __va_start(ap, m);
 157         off = __va_arg(ap, int);
 158         proto = __va_arg(ap, int);
 159         __va_end(ap);
 160
 161         ripsrc.sin_addr = ip->ip_src;
 162         LIST_FOREACH(inp, &ripcbinfo.pcblisthead, inp_list) {
 163                 if (inp->inp_flags & INP_PLACEMARKER)
 164                         continue;
 165 #ifdef INET6
 166                 if ((inp->inp_vflag & INP_IPV4) == 0)
 167                         continue;
 168 #endif
 169                 if (inp->inp_ip_p && inp->inp_ip_p != proto)
 170                         continue;
 171                 if (inp->inp_laddr.s_addr != INADDR_ANY &&
 172                     inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
 173                         continue;
 174                 if (inp->inp_faddr.s_addr != INADDR_ANY &&
 175                     inp->inp_faddr.s_addr != ip->ip_src.s_addr)
 176                         continue;
 177                 if (last) {
 178                         struct mbuf *n = m_copypacket(m, MB_DONTWAIT);
 179
 180 #ifdef IPSEC
 181                         /* check AH/ESP integrity. */
 182                         if (n && ipsec4_in_reject_so(n, last->inp_socket)) {
 183                                 m_freem(n);
 184                                 ipsecstat.in_polvio++;
 185                                 /* do not inject data to pcb */
 186                         } else
 187 #endif /*IPSEC*/
 188 #ifdef FAST_IPSEC
 189                         /* check AH/ESP integrity. */
 190                         if (ipsec4_in_reject(n, last)) {
 191                                 m_freem(n);
 192                                 /* do not inject data to pcb */
 193                         } else
 194 #endif /*FAST_IPSEC*/
 195                         if (n) {
 196                                 if (last->inp_flags & INP_CONTROLOPTS ||
 197                                     last->inp_socket->so_options & SO_TIMESTAMP)
 198                                     ip_savecontrol(last, &opts, ip, n);
 199                                 if (ssb_appendaddr(&last->inp_socket->so_rcv,
 200                                     (struct sockaddr *)&ripsrc, n,
 201                                     opts) == 0) {
 202                                         /* should notify about lost packet */
 203                                         m_freem(n);
 204                                         if (opts)
 205                                             m_freem(opts);
 206                                 } else
 207                                         sorwakeup(last->inp_socket);
 208                                 opts = 0;
 209                         }
 210                 }
 211                 last = inp;
 212         }
 213 #ifdef IPSEC
 214         /* check AH/ESP integrity. */
 215         if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
 216                 m_freem(m);
 217                 ipsecstat.in_polvio++;
 218                 ipstat.ips_delivered--;
 219                 /* do not inject data to pcb */
 220         } else
 221 #endif /*IPSEC*/
 222 #ifdef FAST_IPSEC
 223         /* check AH/ESP integrity. */
 224         if (last && ipsec4_in_reject(m, last)) {
 225                 m_freem(m);
 226                 ipstat.ips_delivered--;
 227                 /* do not inject data to pcb */
 228         } else
 229 #endif /*FAST_IPSEC*/
 230         /* Check the minimum TTL for socket. */
 231         if (last && ip->ip_ttl < last->inp_ip_minttl) {
 232                 m_freem(opts);
 233                 ipstat.ips_delivered--;
 234         } else if (last) {
 235                 if (last->inp_flags & INP_CONTROLOPTS ||
 236                     last->inp_socket->so_options & SO_TIMESTAMP)
 237                         ip_savecontrol(last, &opts, ip, m);
 238                 if (ssb_appendaddr(&last->inp_socket->so_rcv,
 239                     (struct sockaddr *)&ripsrc, m, opts) == 0) {
 240                         m_freem(m);
 241                         if (opts)
 242                             m_freem(opts);
 243                 } else
 244                         sorwakeup(last->inp_socket);
 245         } else {
 246                 m_freem(m);
 247                 ipstat.ips_noproto++;
 248                 ipstat.ips_delivered--;
 249         }
 250 }
 251
 252 /*
 253  * Generate IP header and pass packet to ip_output.
 254  * Tack on options user may have setup with control call.
 255  */
 256 int
 257 rip_output(struct mbuf *m, struct socket *so, ...)
 258 {
 259         struct ip *ip;
 260         struct inpcb *inp = so->so_pcb;
 261         __va_list ap;
 262         int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
 263         u_long dst;
 264
 265         __va_start(ap, so);
 266         dst = __va_arg(ap, u_long);
 267         __va_end(ap);
 268
 269         /*
 270          * If the user handed us a complete IP packet, use it.
 271          * Otherwise, allocate an mbuf for a header and fill it in.
 272          */
 273         if ((inp->inp_flags & INP_HDRINCL) == 0) {
 274                 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
 275                         m_freem(m);
 276                         return(EMSGSIZE);
 277                 }
 278                 M_PREPEND(m, sizeof(struct ip), MB_WAIT);
 279                 if (m == NULL)
 280                         return(ENOBUFS);
 281                 ip = mtod(m, struct ip *);
 282                 ip->ip_tos = inp->inp_ip_tos;
 283                 ip->ip_off = 0;
 284                 ip->ip_p = inp->inp_ip_p;
 285                 ip->ip_len = m->m_pkthdr.len;
 286                 ip->ip_src = inp->inp_laddr;
 287                 ip->ip_dst.s_addr = dst;
 288                 ip->ip_ttl = inp->inp_ip_ttl;
 289         } else {
 290                 int hlen;
 291
 292                 if (m->m_pkthdr.len > IP_MAXPACKET) {
 293                         m_freem(m);
 294                         return(EMSGSIZE);
 295                 }
 296                 if (m->m_len < sizeof(struct ip)) {
 297                         m = m_pullup(m, sizeof(struct ip));
 298                         if (m == NULL)
 299                                 return ENOBUFS;
 300                 }
 301                 ip = mtod(m, struct ip *);
 302                 hlen = IP_VHL_HL(ip->ip_vhl) << 2;
 303
 304                 /* Don't allow header length less than the minimum. */
 305                 if (hlen < sizeof(struct ip)) {
 306                         m_freem(m);
 307                         return EINVAL;
 308                 }
 309
 310                 /*
 311                  * Don't allow both user specified and setsockopt options.
 312                  * Don't allow packet length sizes that will crash.
 313                  */
 314                 if ((hlen != sizeof(struct ip) && inp->inp_options) ||
 315                     ip->ip_len > m->m_pkthdr.len || ip->ip_len < hlen) {
 316                         m_freem(m);
 317                         return EINVAL;
 318                 }
 319                 if (ip->ip_id == 0)
 320                         ip->ip_id = ip_newid();
 321
 322                 /* Prevent ip_output from overwriting header fields */
 323                 flags |= IP_RAWOUTPUT;
 324                 ipstat.ips_rawout++;
 325         }
 326
 327         return ip_output(m, inp->inp_options, &inp->inp_route, flags,
 328                          inp->inp_moptions, inp);
 329 }
 330
 331 /*
 332  * Raw IP socket option processing.
 333  */
 334 int
 335 rip_ctloutput(struct socket *so, struct sockopt *sopt)
 336 {
 337         struct  inpcb *inp = so->so_pcb;
 338         int     error, optval;
 339
 340         if (sopt->sopt_level != IPPROTO_IP)
 341                 return (EINVAL);
 342
 343         error = 0;
 344
 345         switch (sopt->sopt_dir) {
 346         case SOPT_GET:
 347                 switch (sopt->sopt_name) {
 348                 case IP_HDRINCL:
 349                         optval = inp->inp_flags & INP_HDRINCL;
 350                         soopt_from_kbuf(sopt, &optval, sizeof optval);
 351                         break;
 352
 353                 case IP_FW_ADD: /* ADD actually returns the body... */
 354                 case IP_FW_GET:
 355                         if (IPFW_LOADED)
 356                                 error = ip_fw_sockopt(sopt);
 357                         else
 358                                 error = ENOPROTOOPT;
 359                         break;
 360
 361                 case IP_DUMMYNET_GET:
 362                         error = ip_dn_sockopt(sopt);
 363                         break ;
 364
 365                 case MRT_INIT:
 366                 case MRT_DONE:
 367                 case MRT_ADD_VIF:
 368                 case MRT_DEL_VIF:
 369                 case MRT_ADD_MFC:
 370                 case MRT_DEL_MFC:
 371                 case MRT_VERSION:
 372                 case MRT_ASSERT:
 373                 case MRT_API_SUPPORT:
 374                 case MRT_API_CONFIG:
 375                 case MRT_ADD_BW_UPCALL:
 376                 case MRT_DEL_BW_UPCALL:
 377                         error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
 378                                 EOPNOTSUPP;
 379                         break;
 380
 381                 default:
 382                         error = ip_ctloutput(so, sopt);
 383                         break;
 384                 }
 385                 break;
 386
 387         case SOPT_SET:
 388                 switch (sopt->sopt_name) {
 389                 case IP_HDRINCL:
 390                         error = soopt_to_kbuf(sopt, &optval, sizeof optval,
 391                                               sizeof optval);
 392                         if (error)
 393                                 break;
 394                         if (optval)
 395                                 inp->inp_flags |= INP_HDRINCL;
 396                         else
 397                                 inp->inp_flags &= ~INP_HDRINCL;
 398                         break;
 399
 400                 case IP_FW_ADD:
 401                 case IP_FW_DEL:
 402                 case IP_FW_FLUSH:
 403                 case IP_FW_ZERO:
 404                 case IP_FW_RESETLOG:
 405                         if (IPFW_LOADED)
 406                                 error = ip_fw_ctl_ptr(sopt);
 407                         else
 408                                 error = ENOPROTOOPT;
 409                         break;
 410
 411                 case IP_DUMMYNET_CONFIGURE:
 412                 case IP_DUMMYNET_DEL:
 413                 case IP_DUMMYNET_FLUSH:
 414                         error = ip_dn_sockopt(sopt);
 415                         break ;
 416
 417                 case IP_RSVP_ON:
 418                         error = ip_rsvp_init(so);
 419                         break;
 420
 421                 case IP_RSVP_OFF:
 422                         error = ip_rsvp_done();
 423                         break;
 424
 425                 case IP_RSVP_VIF_ON:
 426                 case IP_RSVP_VIF_OFF:
 427                         error = ip_rsvp_vif ?
 428                                 ip_rsvp_vif(so, sopt) : EINVAL;
 429                         break;
 430
 431                 case MRT_INIT:
 432                 case MRT_DONE:
 433                 case MRT_ADD_VIF:
 434                 case MRT_DEL_VIF:
 435                 case MRT_ADD_MFC:
 436                 case MRT_DEL_MFC:
 437                 case MRT_VERSION:
 438                 case MRT_ASSERT:
 439                 case MRT_API_SUPPORT:
 440                 case MRT_API_CONFIG:
 441                 case MRT_ADD_BW_UPCALL:
 442                 case MRT_DEL_BW_UPCALL:
 443                         error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
 444                                         EOPNOTSUPP;
 445                         break;
 446
 447                 default:
 448                         error = ip_ctloutput(so, sopt);
 449                         break;
 450                 }
 451                 break;
 452         }
 453
 454         return (error);
 455 }
 456
 457 /*
 458  * This function exists solely to receive the PRC_IFDOWN messages which
 459  * are sent by if_down().  It looks for an ifaddr whose ifa_addr is sa,
 460  * and calls in_ifadown() to remove all routes corresponding to that address.
 461  * It also receives the PRC_IFUP messages from if_up() and reinstalls the
 462  * interface routes.
 463  */
 464 void
 465 rip_ctlinput(int cmd, struct sockaddr *sa, void *vip)
 466 {
 467         struct in_ifaddr *ia;
 468         struct in_ifaddr_container *iac;
 469         struct ifnet *ifp;
 470         int err;
 471         int flags;
 472
 473         switch (cmd) {
 474         case PRC_IFDOWN:
 475                 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
 476                         ia = iac->ia;
 477
 478                         if (ia->ia_ifa.ifa_addr == sa &&
 479                             (ia->ia_flags & IFA_ROUTE)) {
 480                                 /*
 481                                  * in_ifscrub kills the interface route.
 482                                  */
 483                                 in_ifscrub(ia->ia_ifp, ia);
 484                                 /*
 485                                  * in_ifadown gets rid of all the rest of
 486                                  * the routes.  This is not quite the right
 487                                  * thing to do, but at least if we are running
 488                                  * a routing process they will come back.
 489                                  */
 490                                 in_ifadown(&ia->ia_ifa, 0);
 491                                 break;
 492                         }
 493                 }
 494                 break;
 495
 496         case PRC_IFUP:
 497                 ia = NULL;
 498                 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
 499                         if (iac->ia->ia_ifa.ifa_addr == sa) {
 500                                 ia = iac->ia;
 501                                 break;
 502                         }
 503                 }
 504                 if (ia == NULL || (ia->ia_flags & IFA_ROUTE))
 505                         return;
 506                 flags = RTF_UP;
 507                 ifp = ia->ia_ifa.ifa_ifp;
 508
 509                 if ((ifp->if_flags & IFF_LOOPBACK) ||
 510                     (ifp->if_flags & IFF_POINTOPOINT))
 511                         flags |= RTF_HOST;
 512
 513                 err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
 514                 if (err == 0)
 515                         ia->ia_flags |= IFA_ROUTE;
 516                 break;
 517         }
 518 }
 519
 520 u_long  rip_sendspace = RIPSNDQ;
 521 u_long  rip_recvspace = RIPRCVQ;
 522
 523 SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
 524     &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
 525 SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
 526     &rip_recvspace, 0, "Maximum incoming raw IP datagram size");
 527
 528 static int
 529 rip_attach(struct socket *so, int proto, struct pru_attach_info *ai)
 530 {
 531         struct inpcb *inp;
 532         int error;
 533
 534         inp = so->so_pcb;
 535         if (inp)
 536                 panic("rip_attach");
 537         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
 538         if (error)
 539                 return error;
 540
 541         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 542         if (error)
 543                 return error;
 544         crit_enter();
 545         error = in_pcballoc(so, &ripcbinfo);
 546         crit_exit();
 547         if (error)
 548                 return error;
 549         inp = (struct inpcb *)so->so_pcb;
 550         inp->inp_vflag |= INP_IPV4;
 551         inp->inp_ip_p = proto;
 552         inp->inp_ip_ttl = ip_defttl;
 553         return 0;
 554 }
 555
 556 static int
 557 rip_detach(struct socket *so)
 558 {
 559         struct inpcb *inp;
 560
 561         inp = so->so_pcb;
 562         if (inp == 0)
 563                 panic("rip_detach");
 564         if (so == ip_mrouter && ip_mrouter_done)
 565                 ip_mrouter_done();
 566         if (ip_rsvp_force_done)
 567                 ip_rsvp_force_done(so);
 568         if (so == ip_rsvpd)
 569                 ip_rsvp_done();
 570         in_pcbdetach(inp);
 571         return 0;
 572 }
 573
 574 static int
 575 rip_abort(struct socket *so)
 576 {
 577         soisdisconnected(so);
 578         if (so->so_state & SS_NOFDREF)
 579                 return rip_detach(so);
 580         return 0;
 581 }
 582
 583 static int
 584 rip_disconnect(struct socket *so)
 585 {
 586         if ((so->so_state & SS_ISCONNECTED) == 0)
 587                 return ENOTCONN;
 588         return rip_abort(so);
 589 }
 590
 591 static int
 592 rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 593 {
 594         struct inpcb *inp = so->so_pcb;
 595         struct sockaddr_in *addr = (struct sockaddr_in *)nam;
 596
 597         if (nam->sa_len != sizeof(*addr))
 598                 return EINVAL;
 599
 600         if (TAILQ_EMPTY(&ifnet) || ((addr->sin_family != AF_INET) &&
 601                                     (addr->sin_family != AF_IMPLINK)) ||
 602             (addr->sin_addr.s_addr != INADDR_ANY &&
 603              ifa_ifwithaddr((struct sockaddr *)addr) == 0))
 604                 return EADDRNOTAVAIL;
 605         inp->inp_laddr = addr->sin_addr;
 606         return 0;
 607 }
 608
 609 static int
 610 rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 611 {
 612         struct inpcb *inp = so->so_pcb;
 613         struct sockaddr_in *addr = (struct sockaddr_in *)nam;
 614
 615         if (nam->sa_len != sizeof(*addr))
 616                 return EINVAL;
 617         if (TAILQ_EMPTY(&ifnet))
 618                 return EADDRNOTAVAIL;
 619         if ((addr->sin_family != AF_INET) &&
 620             (addr->sin_family != AF_IMPLINK))
 621                 return EAFNOSUPPORT;
 622         inp->inp_faddr = addr->sin_addr;
 623         soisconnected(so);
 624         return 0;
 625 }
 626
 627 static int
 628 rip_shutdown(struct socket *so)
 629 {
 630         socantsendmore(so);
 631         return 0;
 632 }
 633
 634 static int
 635 rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
 636          struct mbuf *control, struct thread *td)
 637 {
 638         struct inpcb *inp = so->so_pcb;
 639         u_long dst;
 640
 641         if (so->so_state & SS_ISCONNECTED) {
 642                 if (nam) {
 643                         m_freem(m);
 644                         return EISCONN;
 645                 }
 646                 dst = inp->inp_faddr.s_addr;
 647         } else {
 648                 if (nam == NULL) {
 649                         m_freem(m);
 650                         return ENOTCONN;
 651                 }
 652                 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
 653         }
 654         return rip_output(m, so, dst);
 655 }
 656
 657 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, &ripcbinfo, 0,
 658             in_pcblist_global, "S,xinpcb", "List of active raw IP sockets");
 659
 660 struct pr_usrreqs rip_usrreqs = {
 661         .pru_abort = rip_abort,
 662         .pru_accept = pru_accept_notsupp,
 663         .pru_attach = rip_attach,
 664         .pru_bind = rip_bind,
 665         .pru_connect = rip_connect,
 666         .pru_connect2 = pru_connect2_notsupp,
 667         .pru_control = in_control,
 668         .pru_detach = rip_detach,
 669         .pru_disconnect = rip_disconnect,
 670         .pru_listen = pru_listen_notsupp,
 671         .pru_peeraddr = in_setpeeraddr,
 672         .pru_rcvd = pru_rcvd_notsupp,
 673         .pru_rcvoob = pru_rcvoob_notsupp,
 674         .pru_send = rip_send,
 675         .pru_sense = pru_sense_null,
 676         .pru_shutdown = rip_shutdown,
 677         .pru_sockaddr = in_setsockaddr,
 678         .pru_sosend = sosend,
 679         .pru_soreceive = soreceive,
 680         .pru_sopoll = sopoll
 681 };