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  */
  36
  37 #include "opt_inet6.h"
  38 #include "opt_ipsec.h"
  39 #include "opt_carp.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
  54 #include <sys/thread2.h>
  55 #include <sys/socketvar2.h>
  56 #include <sys/msgport2.h>
  57
  58 #include <machine/stdarg.h>
  59
  60 #include <net/if.h>
  61 #ifdef CARP
  62 #include <net/if_types.h>
  63 #endif
  64 #include <net/route.h>
  65
  66 #define _IP_VHL
  67 #include <netinet/in.h>
  68 #include <netinet/in_systm.h>
  69 #include <netinet/ip.h>
  70 #include <netinet/in_pcb.h>
  71 #include <netinet/in_var.h>
  72 #include <netinet/ip_var.h>
  73
  74 #include <net/ip_mroute/ip_mroute.h>
  75 #include <net/ipfw/ip_fw.h>
  76 #include <net/dummynet/ip_dummynet.h>
  77
  78 #ifdef FAST_IPSEC
  79 #include <netproto/ipsec/ipsec.h>
  80 #endif /*FAST_IPSEC*/
  81
  82 #ifdef IPSEC
  83 #include <netinet6/ipsec.h>
  84 #endif /*IPSEC*/
  85
  86 struct  inpcbinfo ripcbinfo;
  87
  88 /* control hooks for ipfw and dummynet */
  89 ip_fw_ctl_t *ip_fw_ctl_ptr;
  90 ip_dn_ctl_t *ip_dn_ctl_ptr;
  91
  92 static struct lwkt_token raw_token = LWKT_TOKEN_INITIALIZER(raw_token);
  93
  94
  95 /*
  96  * hooks for multicast routing. They all default to NULL,
  97  * so leave them not initialized and rely on BSS being set to 0.
  98  */
  99
 100 /* The socket used to communicate with the multicast routing daemon.  */
 101 struct socket  *ip_mrouter;
 102
 103 /* The various mrouter and rsvp functions */
 104 int (*ip_mrouter_set)(struct socket *, struct sockopt *);
 105 int (*ip_mrouter_get)(struct socket *, struct sockopt *);
 106 int (*ip_mrouter_done)(void);
 107 int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
 108                 struct ip_moptions *);
 109 int (*mrt_ioctl)(int, caddr_t);
 110 int (*legal_vif_num)(int);
 111 u_long (*ip_mcast_src)(int);
 112
 113 int (*rsvp_input_p)(struct mbuf **, int *, int);
 114 int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
 115 void (*ip_rsvp_force_done)(struct socket *);
 116
 117 /*
 118  * Nominal space allocated to a raw ip socket.
 119  */
 120 #define RIPSNDQ         8192
 121 #define RIPRCVQ         8192
 122
 123 /*
 124  * Raw interface to IP protocol.
 125  */
 126
 127 /*
 128  * Initialize raw connection block queue.
 129  */
 130 void
 131 rip_init(void)
 132 {
 133         in_pcbinfo_init(&ripcbinfo);
 134         /*
 135          * XXX We don't use the hash list for raw IP, but it's easier
 136          * to allocate a one entry hash list than it is to check all
 137          * over the place for hashbase == NULL.
 138          */
 139         ripcbinfo.hashbase = hashinit(1, M_PCB, &ripcbinfo.hashmask);
 140         ripcbinfo.porthashbase = hashinit(1, M_PCB, &ripcbinfo.porthashmask);
 141         ripcbinfo.wildcardhashbase = hashinit(1, M_PCB,
 142                                               &ripcbinfo.wildcardhashmask);
 143         ripcbinfo.ipi_size = sizeof(struct inpcb);
 144 }
 145
 146 /*
 147  * Setup generic address and protocol structures
 148  * for raw_input routine, then pass them along with
 149  * mbuf chain.
 150  */
 151 int
 152 rip_input(struct mbuf **mp, int *offp, int proto)
 153 {
 154         struct sockaddr_in ripsrc = { sizeof ripsrc, AF_INET };
 155         struct mbuf *m = *mp;
 156         struct ip *ip = mtod(m, struct ip *);
 157         struct inpcb *inp;
 158         struct inpcb *last = NULL;
 159         struct mbuf *opts = NULL;
 160         int off;
 161
 162         off = *offp;
 163         *mp = NULL;
 164
 165         ripsrc.sin_addr = ip->ip_src;
 166         lwkt_gettoken(&raw_token);
 167         LIST_FOREACH(inp, &ripcbinfo.pcblisthead, inp_list) {
 168                 if (inp->inp_flags & INP_PLACEMARKER)
 169                         continue;
 170 #ifdef INET6
 171                 if ((inp->inp_vflag & INP_IPV4) == 0)
 172                         continue;
 173 #endif
 174                 if (inp->inp_ip_p && inp->inp_ip_p != proto)
 175                         continue;
 176                 if (inp->inp_laddr.s_addr != INADDR_ANY &&
 177                     inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
 178                         continue;
 179                 if (inp->inp_faddr.s_addr != INADDR_ANY &&
 180                     inp->inp_faddr.s_addr != ip->ip_src.s_addr)
 181                         continue;
 182                 if (last) {
 183                         struct mbuf *n = m_copypacket(m, MB_DONTWAIT);
 184
 185 #ifdef IPSEC
 186                         /* check AH/ESP integrity. */
 187                         if (n && ipsec4_in_reject_so(n, last->inp_socket)) {
 188                                 m_freem(n);
 189                                 ipsecstat.in_polvio++;
 190                                 /* do not inject data to pcb */
 191                         } else
 192 #endif /*IPSEC*/
 193 #ifdef FAST_IPSEC
 194                         /* check AH/ESP integrity. */
 195                         if (ipsec4_in_reject(n, last)) {
 196                                 m_freem(n);
 197                                 /* do not inject data to pcb */
 198                         } else
 199 #endif /*FAST_IPSEC*/
 200                         if (n) {
 201                                 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
 202                                 if (last->inp_flags & INP_CONTROLOPTS ||
 203                                     last->inp_socket->so_options & SO_TIMESTAMP)
 204                                     ip_savecontrol(last, &opts, ip, n);
 205                                 if (ssb_appendaddr(&last->inp_socket->so_rcv,
 206                                             (struct sockaddr *)&ripsrc, n,
 207                                             opts) == 0) {
 208                                         /* should notify about lost packet */
 209                                         m_freem(n);
 210                                         if (opts)
 211                                             m_freem(opts);
 212                                 } else {
 213                                         sorwakeup(last->inp_socket);
 214                                 }
 215                                 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
 216                                 opts = NULL;
 217                         }
 218                 }
 219                 last = inp;
 220         }
 221 #ifdef IPSEC
 222         /* check AH/ESP integrity. */
 223         if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
 224                 m_freem(m);
 225                 ipsecstat.in_polvio++;
 226                 ipstat.ips_delivered--;
 227                 /* do not inject data to pcb */
 228         } else
 229 #endif /*IPSEC*/
 230 #ifdef FAST_IPSEC
 231         /* check AH/ESP integrity. */
 232         if (last && ipsec4_in_reject(m, last)) {
 233                 m_freem(m);
 234                 ipstat.ips_delivered--;
 235                 /* do not inject data to pcb */
 236         } else
 237 #endif /*FAST_IPSEC*/
 238         /* Check the minimum TTL for socket. */
 239         if (last && ip->ip_ttl < last->inp_ip_minttl) {
 240                 m_freem(opts);
 241                 ipstat.ips_delivered--;
 242         } else if (last) {
 243                 if (last->inp_flags & INP_CONTROLOPTS ||
 244                     last->inp_socket->so_options & SO_TIMESTAMP)
 245                         ip_savecontrol(last, &opts, ip, m);
 246                 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
 247                 if (ssb_appendaddr(&last->inp_socket->so_rcv,
 248                     (struct sockaddr *)&ripsrc, m, opts) == 0) {
 249                         m_freem(m);
 250                         if (opts)
 251                             m_freem(opts);
 252                 } else {
 253                         sorwakeup(last->inp_socket);
 254                 }
 255                 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
 256         } else {
 257                 m_freem(m);
 258                 ipstat.ips_noproto++;
 259                 ipstat.ips_delivered--;
 260         }
 261         lwkt_reltoken(&raw_token);
 262         return(IPPROTO_DONE);
 263 }
 264
 265 /*
 266  * Generate IP header and pass packet to ip_output.
 267  * Tack on options user may have setup with control call.
 268  */
 269 int
 270 rip_output(struct mbuf *m, struct socket *so, ...)
 271 {
 272         struct ip *ip;
 273         struct inpcb *inp = so->so_pcb;
 274         __va_list ap;
 275         int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
 276         u_long dst;
 277
 278         __va_start(ap, so);
 279         dst = __va_arg(ap, u_long);
 280         __va_end(ap);
 281
 282         /*
 283          * If the user handed us a complete IP packet, use it.
 284          * Otherwise, allocate an mbuf for a header and fill it in.
 285          */
 286         if ((inp->inp_flags & INP_HDRINCL) == 0) {
 287                 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
 288                         m_freem(m);
 289                         return(EMSGSIZE);
 290                 }
 291                 M_PREPEND(m, sizeof(struct ip), MB_WAIT);
 292                 if (m == NULL)
 293                         return(ENOBUFS);
 294                 ip = mtod(m, struct ip *);
 295                 ip->ip_tos = inp->inp_ip_tos;
 296                 ip->ip_off = 0;
 297                 ip->ip_p = inp->inp_ip_p;
 298                 ip->ip_len = m->m_pkthdr.len;
 299                 ip->ip_src = inp->inp_laddr;
 300                 ip->ip_dst.s_addr = dst;
 301                 ip->ip_ttl = inp->inp_ip_ttl;
 302         } else {
 303                 int hlen;
 304
 305                 if (m->m_pkthdr.len > IP_MAXPACKET) {
 306                         m_freem(m);
 307                         return(EMSGSIZE);
 308                 }
 309                 if (m->m_len < sizeof(struct ip)) {
 310                         m = m_pullup(m, sizeof(struct ip));
 311                         if (m == NULL)
 312                                 return ENOBUFS;
 313                 }
 314                 ip = mtod(m, struct ip *);
 315                 hlen = IP_VHL_HL(ip->ip_vhl) << 2;
 316
 317                 /* Don't allow header length less than the minimum. */
 318                 if (hlen < sizeof(struct ip)) {
 319                         m_freem(m);
 320                         return EINVAL;
 321                 }
 322
 323                 /*
 324                  * Don't allow both user specified and setsockopt options.
 325                  * Don't allow packet length sizes that will crash.
 326                  */
 327                 if ((hlen != sizeof(struct ip) && inp->inp_options) ||
 328                     ip->ip_len > m->m_pkthdr.len || ip->ip_len < hlen) {
 329                         m_freem(m);
 330                         return EINVAL;
 331                 }
 332                 if (ip->ip_id == 0)
 333                         ip->ip_id = ip_newid();
 334
 335                 /* Prevent ip_output from overwriting header fields */
 336                 flags |= IP_RAWOUTPUT;
 337                 ipstat.ips_rawout++;
 338         }
 339
 340         return ip_output(m, inp->inp_options, &inp->inp_route, flags,
 341                          inp->inp_moptions, inp);
 342 }
 343
 344 /*
 345  * Raw IP socket option processing.
 346  */
 347 void
 348 rip_ctloutput(netmsg_t msg)
 349 {
 350         struct socket *so = msg->base.nm_so;
 351         struct sockopt *sopt = msg->ctloutput.nm_sopt;
 352         struct  inpcb *inp = so->so_pcb;
 353         int     error, optval;
 354
 355         if (sopt->sopt_level != IPPROTO_IP) {
 356                 error = EINVAL;
 357                 goto done;
 358         }
 359
 360         error = 0;
 361
 362         switch (sopt->sopt_dir) {
 363         case SOPT_GET:
 364                 switch (sopt->sopt_name) {
 365                 case IP_HDRINCL:
 366                         optval = inp->inp_flags & INP_HDRINCL;
 367                         soopt_from_kbuf(sopt, &optval, sizeof optval);
 368                         break;
 369
 370                 case IP_FW_ADD: /* ADD actually returns the body... */
 371                 case IP_FW_GET:
 372                         if (IPFW_LOADED)
 373                                 error = ip_fw_sockopt(sopt);
 374                         else
 375                                 error = ENOPROTOOPT;
 376                         break;
 377
 378                 case IP_DUMMYNET_GET:
 379                         error = ip_dn_sockopt(sopt);
 380                         break ;
 381
 382                 case MRT_INIT:
 383                 case MRT_DONE:
 384                 case MRT_ADD_VIF:
 385                 case MRT_DEL_VIF:
 386                 case MRT_ADD_MFC:
 387                 case MRT_DEL_MFC:
 388                 case MRT_VERSION:
 389                 case MRT_ASSERT:
 390                 case MRT_API_SUPPORT:
 391                 case MRT_API_CONFIG:
 392                 case MRT_ADD_BW_UPCALL:
 393                 case MRT_DEL_BW_UPCALL:
 394                         error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
 395                                 EOPNOTSUPP;
 396                         break;
 397
 398                 default:
 399                         ip_ctloutput(msg);
 400                         /* msg invalid now */
 401                         return;
 402                 }
 403                 break;
 404
 405         case SOPT_SET:
 406                 switch (sopt->sopt_name) {
 407                 case IP_HDRINCL:
 408                         error = soopt_to_kbuf(sopt, &optval, sizeof optval,
 409                                               sizeof optval);
 410                         if (error)
 411                                 break;
 412                         if (optval)
 413                                 inp->inp_flags |= INP_HDRINCL;
 414                         else
 415                                 inp->inp_flags &= ~INP_HDRINCL;
 416                         break;
 417
 418                 case IP_FW_ADD:
 419                 case IP_FW_DEL:
 420                 case IP_FW_FLUSH:
 421                 case IP_FW_ZERO:
 422                 case IP_FW_RESETLOG:
 423                         if (IPFW_LOADED)
 424                                 error = ip_fw_ctl_ptr(sopt);
 425                         else
 426                                 error = ENOPROTOOPT;
 427                         break;
 428
 429                 case IP_DUMMYNET_CONFIGURE:
 430                 case IP_DUMMYNET_DEL:
 431                 case IP_DUMMYNET_FLUSH:
 432                         error = ip_dn_sockopt(sopt);
 433                         break ;
 434
 435                 case IP_RSVP_ON:
 436                         error = ip_rsvp_init(so);
 437                         break;
 438
 439                 case IP_RSVP_OFF:
 440                         error = ip_rsvp_done();
 441                         break;
 442
 443                 case IP_RSVP_VIF_ON:
 444                 case IP_RSVP_VIF_OFF:
 445                         error = ip_rsvp_vif ?
 446                                 ip_rsvp_vif(so, sopt) : EINVAL;
 447                         break;
 448
 449                 case MRT_INIT:
 450                 case MRT_DONE:
 451                 case MRT_ADD_VIF:
 452                 case MRT_DEL_VIF:
 453                 case MRT_ADD_MFC:
 454                 case MRT_DEL_MFC:
 455                 case MRT_VERSION:
 456                 case MRT_ASSERT:
 457                 case MRT_API_SUPPORT:
 458                 case MRT_API_CONFIG:
 459                 case MRT_ADD_BW_UPCALL:
 460                 case MRT_DEL_BW_UPCALL:
 461                         error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
 462                                         EOPNOTSUPP;
 463                         break;
 464
 465                 default:
 466                         ip_ctloutput(msg);
 467                         /* msg invalid now */
 468                         return;
 469                 }
 470                 break;
 471         }
 472 done:
 473         lwkt_replymsg(&msg->lmsg, error);
 474 }
 475
 476 /*
 477  * This function exists solely to receive the PRC_IFDOWN messages which
 478  * are sent by if_down().  It looks for an ifaddr whose ifa_addr is sa,
 479  * and calls in_ifadown() to remove all routes corresponding to that address.
 480  * It also receives the PRC_IFUP messages from if_up() and reinstalls the
 481  * interface routes.
 482  */
 483 void
 484 rip_ctlinput(netmsg_t msg)
 485 {
 486         int cmd = msg->ctlinput.nm_cmd;
 487         struct sockaddr *sa = msg->ctlinput.nm_arg;
 488         struct in_ifaddr *ia;
 489         struct in_ifaddr_container *iac;
 490         struct ifnet *ifp;
 491         int err;
 492         int flags;
 493
 494         switch (cmd) {
 495         case PRC_IFDOWN:
 496                 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
 497                         ia = iac->ia;
 498
 499                         if (ia->ia_ifa.ifa_addr == sa &&
 500                             (ia->ia_flags & IFA_ROUTE)) {
 501                                 /*
 502                                  * in_ifscrub kills the interface route.
 503                                  */
 504                                 in_ifscrub(ia->ia_ifp, ia);
 505                                 /*
 506                                  * in_ifadown gets rid of all the rest of
 507                                  * the routes.  This is not quite the right
 508                                  * thing to do, but at least if we are running
 509                                  * a routing process they will come back.
 510                                  */
 511                                 in_ifadown(&ia->ia_ifa, 0);
 512                                 break;
 513                         }
 514                 }
 515                 break;
 516
 517         case PRC_IFUP:
 518                 ia = NULL;
 519                 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
 520                         if (iac->ia->ia_ifa.ifa_addr == sa) {
 521                                 ia = iac->ia;
 522                                 break;
 523                         }
 524                 }
 525                 if (ia == NULL || (ia->ia_flags & IFA_ROUTE))
 526                         goto done;
 527                 flags = RTF_UP;
 528                 ifp = ia->ia_ifa.ifa_ifp;
 529
 530 #ifdef CARP
 531                 /*
 532                  * Don't add prefix routes for CARP interfaces.
 533                  * Prefix routes creation is handled by CARP
 534                  * interfaces themselves.
 535                  */
 536                 if (ifp->if_type == IFT_CARP)
 537                         goto done;
 538 #endif
 539
 540                 if ((ifp->if_flags & IFF_LOOPBACK) ||
 541                     (ifp->if_flags & IFF_POINTOPOINT))
 542                         flags |= RTF_HOST;
 543
 544                 err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
 545                 if (err == 0)
 546                         ia->ia_flags |= IFA_ROUTE;
 547                 break;
 548         }
 549 done:
 550         lwkt_replymsg(&msg->lmsg, 0);
 551 }
 552
 553 u_long  rip_sendspace = RIPSNDQ;
 554 u_long  rip_recvspace = RIPRCVQ;
 555
 556 SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
 557     &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
 558 SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
 559     &rip_recvspace, 0, "Maximum incoming raw IP datagram size");
 560
 561 static void
 562 rip_attach(netmsg_t msg)
 563 {
 564         struct socket *so = msg->base.nm_so;
 565         int proto = msg->attach.nm_proto;
 566         struct pru_attach_info *ai = msg->attach.nm_ai;
 567         struct inpcb *inp;
 568         int error;
 569
 570         inp = so->so_pcb;
 571         if (inp)
 572                 panic("rip_attach");
 573         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
 574         if (error)
 575                 goto done;
 576
 577         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 578         if (error)
 579                 goto done;
 580
 581         lwkt_gettoken(&raw_token);
 582         error = in_pcballoc(so, &ripcbinfo);
 583         if (error == 0) {
 584                 inp = (struct inpcb *)so->so_pcb;
 585                 inp->inp_vflag |= INP_IPV4;
 586                 inp->inp_ip_p = proto;
 587                 inp->inp_ip_ttl = ip_defttl;
 588         }
 589         lwkt_reltoken(&raw_token);
 590         error = 0;
 591 done:
 592         lwkt_replymsg(&msg->lmsg, error);
 593 }
 594
 595 static void
 596 rip_detach(netmsg_t msg)
 597 {
 598         struct socket *so = msg->base.nm_so;
 599         struct inpcb *inp;
 600
 601         inp = so->so_pcb;
 602         if (inp == NULL)
 603                 panic("rip_detach");
 604         if (so == ip_mrouter && ip_mrouter_done)
 605                 ip_mrouter_done();
 606         if (ip_rsvp_force_done)
 607                 ip_rsvp_force_done(so);
 608         if (so == ip_rsvpd)
 609                 ip_rsvp_done();
 610         in_pcbdetach(inp);
 611         lwkt_replymsg(&msg->lmsg, 0);
 612 }
 613
 614 /*
 615  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
 616  *       will sofree() it when we return.
 617  */
 618 static void
 619 rip_abort(netmsg_t msg)
 620 {
 621         struct socket *so = msg->base.nm_so;
 622         int error;
 623
 624         soisdisconnected(so);
 625         if (so->so_state & SS_NOFDREF) {    /* XXX not sure why this test */
 626                 rip_detach(msg);
 627                 /* msg invalid now */
 628                 return;
 629         }
 630         error = 0;
 631         lwkt_replymsg(&msg->lmsg, error);
 632 }
 633
 634 static void
 635 rip_disconnect(netmsg_t msg)
 636 {
 637         struct socket *so = msg->base.nm_so;
 638         int error;
 639
 640         if (so->so_state & SS_ISCONNECTED) {
 641                 soreference(so);
 642                 rip_abort(msg);
 643                 /* msg invalid now */
 644                 sofree(so);
 645                 return;
 646         }
 647         error = ENOTCONN;
 648         lwkt_replymsg(&msg->lmsg, error);
 649 }
 650
 651 static void
 652 rip_bind(netmsg_t msg)
 653 {
 654         struct socket *so = msg->base.nm_so;
 655         struct sockaddr *nam = msg->bind.nm_nam;
 656         struct inpcb *inp = so->so_pcb;
 657         struct sockaddr_in *addr = (struct sockaddr_in *)nam;
 658         int error;
 659
 660         if (nam->sa_len == sizeof(*addr)) {
 661                 if (TAILQ_EMPTY(&ifnet) ||
 662                     ((addr->sin_family != AF_INET) &&
 663                      (addr->sin_family != AF_IMPLINK)) ||
 664                     (addr->sin_addr.s_addr != INADDR_ANY &&
 665                      ifa_ifwithaddr((struct sockaddr *)addr) == 0)) {
 666                         error = EADDRNOTAVAIL;
 667                 } else {
 668                         inp->inp_laddr = addr->sin_addr;
 669                         error = 0;
 670                 }
 671         } else {
 672                 error = EINVAL;
 673         }
 674         lwkt_replymsg(&msg->lmsg, error);
 675 }
 676
 677 static void
 678 rip_connect(netmsg_t msg)
 679 {
 680         struct socket *so = msg->base.nm_so;
 681         struct sockaddr *nam = msg->connect.nm_nam;
 682         struct inpcb *inp = so->so_pcb;
 683         struct sockaddr_in *addr = (struct sockaddr_in *)nam;
 684         int error;
 685
 686         if (nam->sa_len != sizeof(*addr)) {
 687                 error = EINVAL;
 688         } else if (TAILQ_EMPTY(&ifnet)) {
 689                 error = EADDRNOTAVAIL;
 690         } else {
 691                 if ((addr->sin_family != AF_INET) &&
 692                     (addr->sin_family != AF_IMPLINK)) {
 693                         error = EAFNOSUPPORT;
 694                 } else {
 695                         inp->inp_faddr = addr->sin_addr;
 696                         soisconnected(so);
 697                         error = 0;
 698                 }
 699         }
 700         lwkt_replymsg(&msg->lmsg, error);
 701 }
 702
 703 static void
 704 rip_shutdown(netmsg_t msg)
 705 {
 706         socantsendmore(msg->base.nm_so);
 707         lwkt_replymsg(&msg->lmsg, 0);
 708 }
 709
 710 static void
 711 rip_send(netmsg_t msg)
 712 {
 713         struct socket *so = msg->base.nm_so;
 714         struct mbuf *m = msg->send.nm_m;
 715         /*struct mbuf *control = msg->send.nm_control;*/
 716         struct sockaddr *nam = msg->send.nm_addr;
 717         /*int flags = msg->send.nm_flags;*/
 718         struct inpcb *inp = so->so_pcb;
 719         u_long dst;
 720         int error;
 721
 722         if (so->so_state & SS_ISCONNECTED) {
 723                 if (nam) {
 724                         m_freem(m);
 725                         error = EISCONN;
 726                 } else {
 727                         dst = inp->inp_faddr.s_addr;
 728                         error = rip_output(m, so, dst);
 729                 }
 730         } else {
 731                 if (nam == NULL) {
 732                         m_freem(m);
 733                         error = ENOTCONN;
 734                 } else {
 735                         dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
 736                         error = rip_output(m, so, dst);
 737                 }
 738         }
 739         lwkt_replymsg(&msg->lmsg, error);
 740 }
 741
 742 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, &ripcbinfo, 0,
 743             in_pcblist_global, "S,xinpcb", "List of active raw IP sockets");
 744
 745 struct pr_usrreqs rip_usrreqs = {
 746         .pru_abort = rip_abort,
 747         .pru_accept = pr_generic_notsupp,
 748         .pru_attach = rip_attach,
 749         .pru_bind = rip_bind,
 750         .pru_connect = rip_connect,
 751         .pru_connect2 = pr_generic_notsupp,
 752         .pru_control = in_control_dispatch,
 753         .pru_detach = rip_detach,
 754         .pru_disconnect = rip_disconnect,
 755         .pru_listen = pr_generic_notsupp,
 756         .pru_peeraddr = in_setpeeraddr_dispatch,
 757         .pru_rcvd = pr_generic_notsupp,
 758         .pru_rcvoob = pr_generic_notsupp,
 759         .pru_send = rip_send,
 760         .pru_sense = pru_sense_null,
 761         .pru_shutdown = rip_shutdown,
 762         .pru_sockaddr = in_setsockaddr_dispatch,
 763         .pru_sosend = sosend,
 764         .pru_soreceive = soreceive
 765 };