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  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)raw_ip.c    8.7 (Berkeley) 5/15/95
  30  * $FreeBSD: src/sys/netinet/raw_ip.c,v 1.64.2.16 2003/08/24 08:24:38 hsu Exp $
  31  */
  32
  33 #include "opt_inet6.h"
  34 #include "opt_ipsec.h"
  35 #include "opt_carp.h"
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/jail.h>
  41 #include <sys/malloc.h>
  42 #include <sys/mbuf.h>
  43 #include <sys/proc.h>
  44 #include <sys/priv.h>
  45 #include <sys/protosw.h>
  46 #include <sys/socket.h>
  47 #include <sys/socketvar.h>
  48 #include <sys/sysctl.h>
  49
  50 #include <sys/thread2.h>
  51 #include <sys/socketvar2.h>
  52 #include <sys/msgport2.h>
  53
  54 #include <machine/stdarg.h>
  55
  56 #include <net/if.h>
  57 #ifdef CARP
  58 #include <net/if_types.h>
  59 #endif
  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 static struct lwkt_token raw_token = LWKT_TOKEN_INITIALIZER(raw_token);
  89
  90
  91 /*
  92  * hooks for multicast routing. They all default to NULL,
  93  * so leave them not initialized and rely on BSS being set to 0.
  94  */
  95
  96 /* The socket used to communicate with the multicast routing daemon.  */
  97 struct socket  *ip_mrouter;
  98
  99 /* The various mrouter and rsvp functions */
 100 int (*ip_mrouter_set)(struct socket *, struct sockopt *);
 101 int (*ip_mrouter_get)(struct socket *, struct sockopt *);
 102 int (*ip_mrouter_done)(void);
 103 int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
 104                 struct ip_moptions *);
 105 int (*mrt_ioctl)(int, caddr_t);
 106 int (*legal_vif_num)(int);
 107 u_long (*ip_mcast_src)(int);
 108
 109 int (*rsvp_input_p)(struct mbuf **, int *, int);
 110 int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
 111 void (*ip_rsvp_force_done)(struct socket *);
 112
 113 /*
 114  * Nominal space allocated to a raw ip socket.
 115  */
 116 #define RIPSNDQ         8192
 117 #define RIPRCVQ         8192
 118
 119 /*
 120  * Raw interface to IP protocol.
 121  */
 122
 123 /*
 124  * Initialize raw connection block queue.
 125  */
 126 void
 127 rip_init(void)
 128 {
 129         in_pcbinfo_init(&ripcbinfo);
 130         /*
 131          * XXX We don't use the hash list for raw IP, but it's easier
 132          * to allocate a one entry hash list than it is to check all
 133          * over the place for hashbase == NULL.
 134          */
 135         ripcbinfo.hashbase = hashinit(1, M_PCB, &ripcbinfo.hashmask);
 136         ripcbinfo.porthashbase = hashinit(1, M_PCB, &ripcbinfo.porthashmask);
 137         ripcbinfo.wildcardhashbase = hashinit(1, M_PCB,
 138                                               &ripcbinfo.wildcardhashmask);
 139         ripcbinfo.ipi_size = sizeof(struct inpcb);
 140 }
 141
 142 /*
 143  * Setup generic address and protocol structures
 144  * for raw_input routine, then pass them along with
 145  * mbuf chain.
 146  */
 147 int
 148 rip_input(struct mbuf **mp, int *offp, int proto)
 149 {
 150         struct sockaddr_in ripsrc = { sizeof ripsrc, AF_INET };
 151         struct mbuf *m = *mp;
 152         struct ip *ip = mtod(m, struct ip *);
 153         struct inpcb *inp;
 154         struct inpcb *last = NULL;
 155         struct mbuf *opts = NULL;
 156
 157         *mp = NULL;
 158
 159         ripsrc.sin_addr = ip->ip_src;
 160         lwkt_gettoken(&raw_token);
 161         LIST_FOREACH(inp, &ripcbinfo.pcblisthead, inp_list) {
 162                 if (inp->inp_flags & INP_PLACEMARKER)
 163                         continue;
 164 #ifdef INET6
 165                 if ((inp->inp_vflag & INP_IPV4) == 0)
 166                         continue;
 167 #endif
 168                 if (inp->inp_ip_p && inp->inp_ip_p != proto)
 169                         continue;
 170                 if (inp->inp_laddr.s_addr != INADDR_ANY &&
 171                     inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
 172                         continue;
 173                 if (inp->inp_faddr.s_addr != INADDR_ANY &&
 174                     inp->inp_faddr.s_addr != ip->ip_src.s_addr)
 175                         continue;
 176                 if (last) {
 177                         struct mbuf *n = m_copypacket(m, MB_DONTWAIT);
 178
 179 #ifdef IPSEC
 180                         /* check AH/ESP integrity. */
 181                         if (n && ipsec4_in_reject_so(n, last->inp_socket)) {
 182                                 m_freem(n);
 183                                 ipsecstat.in_polvio++;
 184                                 /* do not inject data to pcb */
 185                         } else
 186 #endif /*IPSEC*/
 187 #ifdef FAST_IPSEC
 188                         /* check AH/ESP integrity. */
 189                         if (ipsec4_in_reject(n, last)) {
 190                                 m_freem(n);
 191                                 /* do not inject data to pcb */
 192                         } else
 193 #endif /*FAST_IPSEC*/
 194                         if (n) {
 195                                 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
 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                                 }
 209                                 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
 210                                 opts = NULL;
 211                         }
 212                 }
 213                 last = inp;
 214         }
 215 #ifdef IPSEC
 216         /* check AH/ESP integrity. */
 217         if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
 218                 m_freem(m);
 219                 ipsecstat.in_polvio++;
 220                 ipstat.ips_delivered--;
 221                 /* do not inject data to pcb */
 222         } else
 223 #endif /*IPSEC*/
 224 #ifdef FAST_IPSEC
 225         /* check AH/ESP integrity. */
 226         if (last && ipsec4_in_reject(m, last)) {
 227                 m_freem(m);
 228                 ipstat.ips_delivered--;
 229                 /* do not inject data to pcb */
 230         } else
 231 #endif /*FAST_IPSEC*/
 232         /* Check the minimum TTL for socket. */
 233         if (last && ip->ip_ttl < last->inp_ip_minttl) {
 234                 m_freem(opts);
 235                 ipstat.ips_delivered--;
 236         } else if (last) {
 237                 if (last->inp_flags & INP_CONTROLOPTS ||
 238                     last->inp_socket->so_options & SO_TIMESTAMP)
 239                         ip_savecontrol(last, &opts, ip, m);
 240                 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
 241                 if (ssb_appendaddr(&last->inp_socket->so_rcv,
 242                     (struct sockaddr *)&ripsrc, m, opts) == 0) {
 243                         m_freem(m);
 244                         if (opts)
 245                             m_freem(opts);
 246                 } else {
 247                         sorwakeup(last->inp_socket);
 248                 }
 249                 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
 250         } else {
 251                 m_freem(m);
 252                 ipstat.ips_noproto++;
 253                 ipstat.ips_delivered--;
 254         }
 255         lwkt_reltoken(&raw_token);
 256         return(IPPROTO_DONE);
 257 }
 258
 259 /*
 260  * Generate IP header and pass packet to ip_output.
 261  * Tack on options user may have setup with control call.
 262  */
 263 int
 264 rip_output(struct mbuf *m, struct socket *so, ...)
 265 {
 266         struct ip *ip;
 267         struct inpcb *inp = so->so_pcb;
 268         __va_list ap;
 269         int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
 270         u_long dst;
 271
 272         __va_start(ap, so);
 273         dst = __va_arg(ap, u_long);
 274         __va_end(ap);
 275
 276         /*
 277          * If the user handed us a complete IP packet, use it.
 278          * Otherwise, allocate an mbuf for a header and fill it in.
 279          */
 280         if ((inp->inp_flags & INP_HDRINCL) == 0) {
 281                 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
 282                         m_freem(m);
 283                         return(EMSGSIZE);
 284                 }
 285                 M_PREPEND(m, sizeof(struct ip), MB_WAIT);
 286                 if (m == NULL)
 287                         return(ENOBUFS);
 288                 ip = mtod(m, struct ip *);
 289                 ip->ip_tos = inp->inp_ip_tos;
 290                 ip->ip_off = 0;
 291                 ip->ip_p = inp->inp_ip_p;
 292                 ip->ip_len = m->m_pkthdr.len;
 293                 ip->ip_src = inp->inp_laddr;
 294                 ip->ip_dst.s_addr = dst;
 295                 ip->ip_ttl = inp->inp_ip_ttl;
 296         } else {
 297                 int hlen;
 298
 299                 if (m->m_pkthdr.len > IP_MAXPACKET) {
 300                         m_freem(m);
 301                         return(EMSGSIZE);
 302                 }
 303                 if (m->m_len < sizeof(struct ip)) {
 304                         m = m_pullup(m, sizeof(struct ip));
 305                         if (m == NULL)
 306                                 return ENOBUFS;
 307                 }
 308                 ip = mtod(m, struct ip *);
 309                 hlen = IP_VHL_HL(ip->ip_vhl) << 2;
 310
 311                 /* Don't allow header length less than the minimum. */
 312                 if (hlen < sizeof(struct ip)) {
 313                         m_freem(m);
 314                         return EINVAL;
 315                 }
 316
 317                 /*
 318                  * Don't allow both user specified and setsockopt options.
 319                  * Don't allow packet length sizes that will crash.
 320                  */
 321                 if ((hlen != sizeof(struct ip) && inp->inp_options) ||
 322                     ip->ip_len > m->m_pkthdr.len || ip->ip_len < hlen) {
 323                         m_freem(m);
 324                         return EINVAL;
 325                 }
 326                 if (ip->ip_id == 0)
 327                         ip->ip_id = ip_newid();
 328
 329                 /* Prevent ip_output from overwriting header fields */
 330                 flags |= IP_RAWOUTPUT;
 331                 ipstat.ips_rawout++;
 332         }
 333
 334         return ip_output(m, inp->inp_options, &inp->inp_route, flags,
 335                          inp->inp_moptions, inp);
 336 }
 337
 338 /*
 339  * Raw IP socket option processing.
 340  */
 341 void
 342 rip_ctloutput(netmsg_t msg)
 343 {
 344         struct socket *so = msg->base.nm_so;
 345         struct sockopt *sopt = msg->ctloutput.nm_sopt;
 346         struct  inpcb *inp = so->so_pcb;
 347         int     error, optval;
 348
 349         if (sopt->sopt_level != IPPROTO_IP) {
 350                 error = EINVAL;
 351                 goto done;
 352         }
 353
 354         error = 0;
 355
 356         switch (sopt->sopt_dir) {
 357         case SOPT_GET:
 358                 switch (sopt->sopt_name) {
 359                 case IP_HDRINCL:
 360                         optval = inp->inp_flags & INP_HDRINCL;
 361                         soopt_from_kbuf(sopt, &optval, sizeof optval);
 362                         break;
 363
 364                 case IP_FW_ADD: /* ADD actually returns the body... */
 365                 case IP_FW_GET:
 366                         if (IPFW_LOADED)
 367                                 error = ip_fw_sockopt(sopt);
 368                         else
 369                                 error = ENOPROTOOPT;
 370                         break;
 371
 372                 case IP_DUMMYNET_GET:
 373                         error = ip_dn_sockopt(sopt);
 374                         break ;
 375
 376                 case MRT_INIT:
 377                 case MRT_DONE:
 378                 case MRT_ADD_VIF:
 379                 case MRT_DEL_VIF:
 380                 case MRT_ADD_MFC:
 381                 case MRT_DEL_MFC:
 382                 case MRT_VERSION:
 383                 case MRT_ASSERT:
 384                 case MRT_API_SUPPORT:
 385                 case MRT_API_CONFIG:
 386                 case MRT_ADD_BW_UPCALL:
 387                 case MRT_DEL_BW_UPCALL:
 388                         error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
 389                                 EOPNOTSUPP;
 390                         break;
 391
 392                 default:
 393                         ip_ctloutput(msg);
 394                         /* msg invalid now */
 395                         return;
 396                 }
 397                 break;
 398
 399         case SOPT_SET:
 400                 switch (sopt->sopt_name) {
 401                 case IP_HDRINCL:
 402                         error = soopt_to_kbuf(sopt, &optval, sizeof optval,
 403                                               sizeof optval);
 404                         if (error)
 405                                 break;
 406                         if (optval)
 407                                 inp->inp_flags |= INP_HDRINCL;
 408                         else
 409                                 inp->inp_flags &= ~INP_HDRINCL;
 410                         break;
 411
 412                 case IP_FW_ADD:
 413                 case IP_FW_DEL:
 414                 case IP_FW_FLUSH:
 415                 case IP_FW_ZERO:
 416                 case IP_FW_RESETLOG:
 417                         if (IPFW_LOADED)
 418                                 error = ip_fw_ctl_ptr(sopt);
 419                         else
 420                                 error = ENOPROTOOPT;
 421                         break;
 422
 423                 case IP_DUMMYNET_CONFIGURE:
 424                 case IP_DUMMYNET_DEL:
 425                 case IP_DUMMYNET_FLUSH:
 426                         error = ip_dn_sockopt(sopt);
 427                         break ;
 428
 429                 case IP_RSVP_ON:
 430                         error = ip_rsvp_init(so);
 431                         break;
 432
 433                 case IP_RSVP_OFF:
 434                         error = ip_rsvp_done();
 435                         break;
 436
 437                 case IP_RSVP_VIF_ON:
 438                 case IP_RSVP_VIF_OFF:
 439                         error = ip_rsvp_vif ?
 440                                 ip_rsvp_vif(so, sopt) : EINVAL;
 441                         break;
 442
 443                 case MRT_INIT:
 444                 case MRT_DONE:
 445                 case MRT_ADD_VIF:
 446                 case MRT_DEL_VIF:
 447                 case MRT_ADD_MFC:
 448                 case MRT_DEL_MFC:
 449                 case MRT_VERSION:
 450                 case MRT_ASSERT:
 451                 case MRT_API_SUPPORT:
 452                 case MRT_API_CONFIG:
 453                 case MRT_ADD_BW_UPCALL:
 454                 case MRT_DEL_BW_UPCALL:
 455                         error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
 456                                         EOPNOTSUPP;
 457                         break;
 458
 459                 default:
 460                         ip_ctloutput(msg);
 461                         /* msg invalid now */
 462                         return;
 463                 }
 464                 break;
 465         }
 466 done:
 467         lwkt_replymsg(&msg->lmsg, error);
 468 }
 469
 470 /*
 471  * This function exists solely to receive the PRC_IFDOWN messages which
 472  * are sent by if_down().  It looks for an ifaddr whose ifa_addr is sa,
 473  * and calls in_ifadown() to remove all routes corresponding to that address.
 474  * It also receives the PRC_IFUP messages from if_up() and reinstalls the
 475  * interface routes.
 476  */
 477 void
 478 rip_ctlinput(netmsg_t msg)
 479 {
 480         int cmd = msg->ctlinput.nm_cmd;
 481         struct sockaddr *sa = msg->ctlinput.nm_arg;
 482         struct in_ifaddr *ia;
 483         struct in_ifaddr_container *iac;
 484         struct ifnet *ifp;
 485         int err;
 486         int flags;
 487
 488         switch (cmd) {
 489         case PRC_IFDOWN:
 490                 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
 491                         ia = iac->ia;
 492
 493                         if (ia->ia_ifa.ifa_addr == sa &&
 494                             (ia->ia_flags & IFA_ROUTE)) {
 495                                 /*
 496                                  * in_ifscrub kills the interface route.
 497                                  */
 498                                 in_ifscrub(ia->ia_ifp, ia);
 499                                 /*
 500                                  * in_ifadown gets rid of all the rest of
 501                                  * the routes.  This is not quite the right
 502                                  * thing to do, but at least if we are running
 503                                  * a routing process they will come back.
 504                                  */
 505                                 in_ifadown(&ia->ia_ifa, 0);
 506                                 break;
 507                         }
 508                 }
 509                 break;
 510
 511         case PRC_IFUP:
 512                 ia = NULL;
 513                 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
 514                         if (iac->ia->ia_ifa.ifa_addr == sa) {
 515                                 ia = iac->ia;
 516                                 break;
 517                         }
 518                 }
 519                 if (ia == NULL || (ia->ia_flags & IFA_ROUTE))
 520                         goto done;
 521                 flags = RTF_UP;
 522                 ifp = ia->ia_ifa.ifa_ifp;
 523
 524 #ifdef CARP
 525                 /*
 526                  * Don't add prefix routes for CARP interfaces.
 527                  * Prefix routes creation is handled by CARP
 528                  * interfaces themselves.
 529                  */
 530                 if (ifp->if_type == IFT_CARP)
 531                         goto done;
 532 #endif
 533
 534                 if ((ifp->if_flags & IFF_LOOPBACK) ||
 535                     (ifp->if_flags & IFF_POINTOPOINT))
 536                         flags |= RTF_HOST;
 537
 538                 err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
 539                 if (err == 0)
 540                         ia->ia_flags |= IFA_ROUTE;
 541                 break;
 542         }
 543 done:
 544         lwkt_replymsg(&msg->lmsg, 0);
 545 }
 546
 547 u_long  rip_sendspace = RIPSNDQ;
 548 u_long  rip_recvspace = RIPRCVQ;
 549
 550 SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
 551     &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
 552 SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
 553     &rip_recvspace, 0, "Maximum incoming raw IP datagram size");
 554
 555 static void
 556 rip_attach(netmsg_t msg)
 557 {
 558         struct socket *so = msg->base.nm_so;
 559         int proto = msg->attach.nm_proto;
 560         struct pru_attach_info *ai = msg->attach.nm_ai;
 561         struct inpcb *inp;
 562         int error;
 563
 564         inp = so->so_pcb;
 565         if (inp)
 566                 panic("rip_attach");
 567         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
 568         if (error)
 569                 goto done;
 570
 571         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 572         if (error)
 573                 goto done;
 574
 575         lwkt_gettoken(&raw_token);
 576         error = in_pcballoc(so, &ripcbinfo);
 577         if (error == 0) {
 578                 inp = (struct inpcb *)so->so_pcb;
 579                 inp->inp_vflag |= INP_IPV4;
 580                 inp->inp_ip_p = proto;
 581                 inp->inp_ip_ttl = ip_defttl;
 582         }
 583         lwkt_reltoken(&raw_token);
 584         error = 0;
 585 done:
 586         lwkt_replymsg(&msg->lmsg, error);
 587 }
 588
 589 static void
 590 rip_detach(netmsg_t msg)
 591 {
 592         struct socket *so = msg->base.nm_so;
 593         struct inpcb *inp;
 594
 595         inp = so->so_pcb;
 596         if (inp == NULL)
 597                 panic("rip_detach");
 598         if (so == ip_mrouter && ip_mrouter_done)
 599                 ip_mrouter_done();
 600         if (ip_rsvp_force_done)
 601                 ip_rsvp_force_done(so);
 602         if (so == ip_rsvpd)
 603                 ip_rsvp_done();
 604         in_pcbdetach(inp);
 605         lwkt_replymsg(&msg->lmsg, 0);
 606 }
 607
 608 /*
 609  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
 610  *       will sofree() it when we return.
 611  */
 612 static void
 613 rip_abort(netmsg_t msg)
 614 {
 615         struct socket *so = msg->base.nm_so;
 616         int error;
 617
 618         soisdisconnected(so);
 619         if (so->so_state & SS_NOFDREF) {    /* XXX not sure why this test */
 620                 rip_detach(msg);
 621                 /* msg invalid now */
 622                 return;
 623         }
 624         error = 0;
 625         lwkt_replymsg(&msg->lmsg, error);
 626 }
 627
 628 static void
 629 rip_disconnect(netmsg_t msg)
 630 {
 631         struct socket *so = msg->base.nm_so;
 632         int error;
 633
 634         if (so->so_state & SS_ISCONNECTED) {
 635                 soreference(so);
 636                 rip_abort(msg);
 637                 /* msg invalid now */
 638                 sofree(so);
 639                 return;
 640         }
 641         error = ENOTCONN;
 642         lwkt_replymsg(&msg->lmsg, error);
 643 }
 644
 645 static void
 646 rip_bind(netmsg_t msg)
 647 {
 648         struct socket *so = msg->base.nm_so;
 649         struct sockaddr *nam = msg->bind.nm_nam;
 650         struct inpcb *inp = so->so_pcb;
 651         struct sockaddr_in *addr = (struct sockaddr_in *)nam;
 652         int error;
 653
 654         if (nam->sa_len == sizeof(*addr)) {
 655                 if (TAILQ_EMPTY(&ifnet) ||
 656                     ((addr->sin_family != AF_INET) &&
 657                      (addr->sin_family != AF_IMPLINK)) ||
 658                     (addr->sin_addr.s_addr != INADDR_ANY &&
 659                      ifa_ifwithaddr((struct sockaddr *)addr) == 0)) {
 660                         error = EADDRNOTAVAIL;
 661                 } else {
 662                         inp->inp_laddr = addr->sin_addr;
 663                         error = 0;
 664                 }
 665         } else {
 666                 error = EINVAL;
 667         }
 668         lwkt_replymsg(&msg->lmsg, error);
 669 }
 670
 671 static void
 672 rip_connect(netmsg_t msg)
 673 {
 674         struct socket *so = msg->base.nm_so;
 675         struct sockaddr *nam = msg->connect.nm_nam;
 676         struct inpcb *inp = so->so_pcb;
 677         struct sockaddr_in *addr = (struct sockaddr_in *)nam;
 678         int error;
 679
 680         if (nam->sa_len != sizeof(*addr)) {
 681                 error = EINVAL;
 682         } else if (TAILQ_EMPTY(&ifnet)) {
 683                 error = EADDRNOTAVAIL;
 684         } else {
 685                 if ((addr->sin_family != AF_INET) &&
 686                     (addr->sin_family != AF_IMPLINK)) {
 687                         error = EAFNOSUPPORT;
 688                 } else {
 689                         inp->inp_faddr = addr->sin_addr;
 690                         soisconnected(so);
 691                         error = 0;
 692                 }
 693         }
 694         lwkt_replymsg(&msg->lmsg, error);
 695 }
 696
 697 static void
 698 rip_shutdown(netmsg_t msg)
 699 {
 700         socantsendmore(msg->base.nm_so);
 701         lwkt_replymsg(&msg->lmsg, 0);
 702 }
 703
 704 static void
 705 rip_send(netmsg_t msg)
 706 {
 707         struct socket *so = msg->base.nm_so;
 708         struct mbuf *m = msg->send.nm_m;
 709         /*struct mbuf *control = msg->send.nm_control;*/
 710         struct sockaddr *nam = msg->send.nm_addr;
 711         /*int flags = msg->send.nm_flags;*/
 712         struct inpcb *inp = so->so_pcb;
 713         u_long dst;
 714         int error;
 715
 716         if (so->so_state & SS_ISCONNECTED) {
 717                 if (nam) {
 718                         m_freem(m);
 719                         error = EISCONN;
 720                 } else {
 721                         dst = inp->inp_faddr.s_addr;
 722                         error = rip_output(m, so, dst);
 723                 }
 724         } else {
 725                 if (nam == NULL) {
 726                         m_freem(m);
 727                         error = ENOTCONN;
 728                 } else {
 729                         dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
 730                         error = rip_output(m, so, dst);
 731                 }
 732         }
 733         lwkt_replymsg(&msg->lmsg, error);
 734 }
 735
 736 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, &ripcbinfo, 0,
 737             in_pcblist_global, "S,xinpcb", "List of active raw IP sockets");
 738
 739 struct pr_usrreqs rip_usrreqs = {
 740         .pru_abort = rip_abort,
 741         .pru_accept = pr_generic_notsupp,
 742         .pru_attach = rip_attach,
 743         .pru_bind = rip_bind,
 744         .pru_connect = rip_connect,
 745         .pru_connect2 = pr_generic_notsupp,
 746         .pru_control = in_control_dispatch,
 747         .pru_detach = rip_detach,
 748         .pru_disconnect = rip_disconnect,
 749         .pru_listen = pr_generic_notsupp,
 750         .pru_peeraddr = in_setpeeraddr_dispatch,
 751         .pru_rcvd = pr_generic_notsupp,
 752         .pru_rcvoob = pr_generic_notsupp,
 753         .pru_send = rip_send,
 754         .pru_sense = pru_sense_null,
 755         .pru_shutdown = rip_shutdown,
 756         .pru_sockaddr = in_setsockaddr_dispatch,
 757         .pru_sosend = sosend,
 758         .pru_soreceive = soreceive
 759 };