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. 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/ipfw3/ip_fw.h>
  73 #include <net/dummynet/ip_dummynet.h>
  74 #include <net/dummynet3/ip_dummynet3.h>
  75
  76 #ifdef FAST_IPSEC
  77 #include <netproto/ipsec/ipsec.h>
  78 #endif /*FAST_IPSEC*/
  79
  80 #ifdef IPSEC
  81 #include <netinet6/ipsec.h>
  82 #endif /*IPSEC*/
  83
  84 struct  inpcbinfo ripcbinfo;
  85 struct  inpcbportinfo ripcbportinfo;
  86
  87 /* control hooks for ipfw and dummynet */
  88 ip_fw_ctl_t *ip_fw_ctl_ptr;
  89 ip_fw_ctl_t *ip_fw_ctl_x_ptr;
  90 ip_dn_ctl_t *ip_dn_ctl_ptr;
  91
  92
  93 /*
  94  * hooks for multicast routing. They all default to NULL,
  95  * so leave them not initialized and rely on BSS being set to 0.
  96  */
  97
  98 /* The socket used to communicate with the multicast routing daemon.  */
  99 struct socket  *ip_mrouter;
 100
 101 /* The various mrouter and rsvp functions */
 102 int (*ip_mrouter_set)(struct socket *, struct sockopt *);
 103 int (*ip_mrouter_get)(struct socket *, struct sockopt *);
 104 int (*ip_mrouter_done)(void);
 105 int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
 106                 struct ip_moptions *);
 107 int (*mrt_ioctl)(u_long, caddr_t);
 108 int (*legal_vif_num)(int);
 109 u_long (*ip_mcast_src)(int);
 110
 111 int (*rsvp_input_p)(struct mbuf **, int *, int);
 112 int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
 113 void (*ip_rsvp_force_done)(struct socket *);
 114
 115 /*
 116  * Nominal space allocated to a raw ip socket.
 117  */
 118 #define RIPSNDQ         8192
 119 #define RIPRCVQ         8192
 120
 121 /*
 122  * Raw interface to IP protocol.
 123  */
 124
 125 /*
 126  * Initialize raw connection block queue.
 127  */
 128 void
 129 rip_init(void)
 130 {
 131         in_pcbinfo_init(&ripcbinfo, 0, FALSE);
 132         in_pcbportinfo_init(&ripcbportinfo, 1, 0);
 133         /*
 134          * XXX We don't use the hash list for raw IP, but it's easier
 135          * to allocate a one entry hash list than it is to check all
 136          * over the place for hashbase == NULL.
 137          */
 138         ripcbinfo.hashbase = hashinit(1, M_PCB, &ripcbinfo.hashmask);
 139         in_pcbportinfo_set(&ripcbinfo, &ripcbportinfo, 1);
 140         ripcbinfo.wildcardhashbase = hashinit(1, M_PCB,
 141                                               &ripcbinfo.wildcardhashmask);
 142         ripcbinfo.ipi_size = sizeof(struct inpcb);
 143 }
 144
 145 /*
 146  * Setup generic address and protocol structures
 147  * for raw_input routine, then pass them along with
 148  * mbuf chain.
 149  */
 150 int
 151 rip_input(struct mbuf **mp, int *offp, int proto)
 152 {
 153         struct sockaddr_in ripsrc = { sizeof ripsrc, AF_INET };
 154         struct mbuf *m = *mp;
 155         struct ip *ip = mtod(m, struct ip *);
 156         struct inpcb *inp;
 157         struct inpcb *last = NULL;
 158         struct mbuf *opts = NULL;
 159
 160         ASSERT_IN_NETISR(0);
 161
 162         *mp = NULL;
 163
 164         ripsrc.sin_addr = ip->ip_src;
 165         LIST_FOREACH(inp, &ripcbinfo.pcblisthead, inp_list) {
 166                 if (inp->inp_flags & INP_PLACEMARKER)
 167                         continue;
 168 #ifdef INET6
 169                 if (!INP_ISIPV4(inp))
 170                         continue;
 171 #endif
 172                 if (inp->inp_ip_p && inp->inp_ip_p != proto)
 173                         continue;
 174                 if (inp->inp_laddr.s_addr != INADDR_ANY &&
 175                     inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
 176                         continue;
 177                 if (inp->inp_faddr.s_addr != INADDR_ANY &&
 178                     inp->inp_faddr.s_addr != ip->ip_src.s_addr)
 179                         continue;
 180                 if (last) {
 181                         struct mbuf *n = m_copypacket(m, M_NOWAIT);
 182
 183 #ifdef IPSEC
 184                         /* check AH/ESP integrity. */
 185                         if (n && ipsec4_in_reject_so(n, last->inp_socket)) {
 186                                 m_freem(n);
 187                                 ipsecstat.in_polvio++;
 188                                 /* do not inject data to pcb */
 189                         } else
 190 #endif /*IPSEC*/
 191 #ifdef FAST_IPSEC
 192                         /* check AH/ESP integrity. */
 193                         if (ipsec4_in_reject(n, last)) {
 194                                 m_freem(n);
 195                                 /* do not inject data to pcb */
 196                         } else
 197 #endif /*FAST_IPSEC*/
 198                         if (n) {
 199                                 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
 200                                 if (last->inp_flags & INP_CONTROLOPTS ||
 201                                     last->inp_socket->so_options & SO_TIMESTAMP)
 202                                     ip_savecontrol(last, &opts, ip, n);
 203                                 if (ssb_appendaddr(&last->inp_socket->so_rcv,
 204                                             (struct sockaddr *)&ripsrc, n,
 205                                             opts) == 0) {
 206                                         /* should notify about lost packet */
 207                                         m_freem(n);
 208                                         if (opts)
 209                                             m_freem(opts);
 210                                 } else {
 211                                         sorwakeup(last->inp_socket);
 212                                 }
 213                                 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
 214                                 opts = NULL;
 215                         }
 216                 }
 217                 last = inp;
 218         }
 219 #ifdef IPSEC
 220         /* check AH/ESP integrity. */
 221         if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
 222                 m_freem(m);
 223                 ipsecstat.in_polvio++;
 224                 ipstat.ips_delivered--;
 225                 /* do not inject data to pcb */
 226         } else
 227 #endif /*IPSEC*/
 228 #ifdef FAST_IPSEC
 229         /* check AH/ESP integrity. */
 230         if (last && ipsec4_in_reject(m, last)) {
 231                 m_freem(m);
 232                 ipstat.ips_delivered--;
 233                 /* do not inject data to pcb */
 234         } else
 235 #endif /*FAST_IPSEC*/
 236         /* Check the minimum TTL for socket. */
 237         if (last && ip->ip_ttl < last->inp_ip_minttl) {
 238                 m_freem(opts);
 239                 ipstat.ips_delivered--;
 240         } else if (last) {
 241                 if (last->inp_flags & INP_CONTROLOPTS ||
 242                     last->inp_socket->so_options & SO_TIMESTAMP)
 243                         ip_savecontrol(last, &opts, ip, m);
 244                 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
 245                 if (ssb_appendaddr(&last->inp_socket->so_rcv,
 246                     (struct sockaddr *)&ripsrc, m, opts) == 0) {
 247                         m_freem(m);
 248                         if (opts)
 249                             m_freem(opts);
 250                 } else {
 251                         sorwakeup(last->inp_socket);
 252                 }
 253                 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
 254         } else {
 255                 m_freem(m);
 256                 ipstat.ips_noproto++;
 257                 ipstat.ips_delivered--;
 258         }
 259         return(IPPROTO_DONE);
 260 }
 261
 262 /*
 263  * Generate IP header and pass packet to ip_output.
 264  * Tack on options user may have setup with control call.
 265  */
 266 int
 267 rip_output(struct mbuf *m, struct socket *so, ...)
 268 {
 269         struct ip *ip;
 270         struct inpcb *inp = so->so_pcb;
 271         __va_list ap;
 272         int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
 273         u_long dst;
 274
 275         ASSERT_IN_NETISR(0);
 276
 277         __va_start(ap, so);
 278         dst = __va_arg(ap, u_long);
 279         __va_end(ap);
 280
 281         /*
 282          * If the user handed us a complete IP packet, use it.
 283          * Otherwise, allocate an mbuf for a header and fill it in.
 284          */
 285         if ((inp->inp_flags & INP_HDRINCL) == 0) {
 286                 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
 287                         m_freem(m);
 288                         return(EMSGSIZE);
 289                 }
 290                 M_PREPEND(m, sizeof(struct ip), M_WAITOK);
 291                 if (m == NULL)
 292                         return(ENOBUFS);
 293                 ip = mtod(m, struct ip *);
 294                 ip->ip_tos = inp->inp_ip_tos;
 295                 ip->ip_off = 0;
 296                 ip->ip_p = inp->inp_ip_p;
 297                 ip->ip_len = m->m_pkthdr.len;
 298                 ip->ip_src = inp->inp_laddr;
 299                 ip->ip_dst.s_addr = dst;
 300                 ip->ip_ttl = inp->inp_ip_ttl;
 301         } else {
 302                 int hlen;
 303
 304                 if (m->m_pkthdr.len > IP_MAXPACKET) {
 305                         m_freem(m);
 306                         return(EMSGSIZE);
 307                 }
 308                 if (m->m_len < sizeof(struct ip)) {
 309                         m = m_pullup(m, sizeof(struct ip));
 310                         if (m == NULL)
 311                                 return ENOBUFS;
 312                 }
 313                 ip = mtod(m, struct ip *);
 314                 hlen = IP_VHL_HL(ip->ip_vhl) << 2;
 315
 316                 /* Don't allow header length less than the minimum. */
 317                 if (hlen < sizeof(struct ip)) {
 318                         m_freem(m);
 319                         return EINVAL;
 320                 }
 321
 322                 /*
 323                  * Don't allow both user specified and setsockopt options.
 324                  * Don't allow packet length sizes that will crash.
 325                  */
 326                 if ((hlen != sizeof(struct ip) && inp->inp_options) ||
 327                     ip->ip_len > m->m_pkthdr.len || ip->ip_len < hlen) {
 328                         m_freem(m);
 329                         return EINVAL;
 330                 }
 331                 if (ip->ip_id == 0)
 332                         ip->ip_id = ip_newid();
 333
 334                 /* Prevent ip_output from overwriting header fields */
 335                 flags |= IP_RAWOUTPUT;
 336                 ipstat.ips_rawout++;
 337         }
 338
 339         return ip_output(m, inp->inp_options, &inp->inp_route, flags,
 340                          inp->inp_moptions, inp);
 341 }
 342
 343 /*
 344  * Raw IP socket option processing.
 345  */
 346 void
 347 rip_ctloutput(netmsg_t msg)
 348 {
 349         struct socket *so = msg->base.nm_so;
 350         struct sockopt *sopt = msg->ctloutput.nm_sopt;
 351         struct  inpcb *inp = so->so_pcb;
 352         int     error, optval;
 353
 354         ASSERT_IN_NETISR(0);
 355
 356         error = 0;
 357
 358         /* Get socket's owner cpuid hint */
 359         if (sopt->sopt_level == SOL_SOCKET &&
 360             sopt->sopt_dir == SOPT_GET &&
 361             sopt->sopt_name == SO_CPUHINT) {
 362                 optval = mycpuid;
 363                 soopt_from_kbuf(sopt, &optval, sizeof(optval));
 364                 goto done;
 365         }
 366
 367         if (sopt->sopt_level != IPPROTO_IP) {
 368                 error = EINVAL;
 369                 goto done;
 370         }
 371
 372         switch (sopt->sopt_dir) {
 373         case SOPT_GET:
 374                 switch (sopt->sopt_name) {
 375                 case IP_HDRINCL:
 376                         optval = inp->inp_flags & INP_HDRINCL;
 377                         soopt_from_kbuf(sopt, &optval, sizeof optval);
 378                         break;
 379                 case IP_FW_X:
 380                         if (IPFW3_LOADED)
 381                                 error = ip_fw3_sockopt(sopt);
 382                         else
 383                                 error = ENOPROTOOPT;
 384                         break;
 385                 case IP_FW_ADD: /* ADD actually returns the body... */
 386                 case IP_FW_GET:
 387                         if (IPFW_LOADED)
 388                                 error = ip_fw_sockopt(sopt);
 389                         else
 390                                 error = ENOPROTOOPT;
 391                         break;
 392
 393                 case IP_DUMMYNET_GET:
 394                         error = ip_dn_sockopt(sopt);
 395                         break ;
 396
 397                 case MRT_INIT:
 398                 case MRT_DONE:
 399                 case MRT_ADD_VIF:
 400                 case MRT_DEL_VIF:
 401                 case MRT_ADD_MFC:
 402                 case MRT_DEL_MFC:
 403                 case MRT_VERSION:
 404                 case MRT_ASSERT:
 405                 case MRT_API_SUPPORT:
 406                 case MRT_API_CONFIG:
 407                 case MRT_ADD_BW_UPCALL:
 408                 case MRT_DEL_BW_UPCALL:
 409                         error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
 410                                 EOPNOTSUPP;
 411                         break;
 412
 413                 default:
 414                         ip_ctloutput(msg);
 415                         /* msg invalid now */
 416                         return;
 417                 }
 418                 break;
 419
 420         case SOPT_SET:
 421                 switch (sopt->sopt_name) {
 422                 case IP_HDRINCL:
 423                         error = soopt_to_kbuf(sopt, &optval, sizeof optval,
 424                                               sizeof optval);
 425                         if (error)
 426                                 break;
 427                         if (optval)
 428                                 inp->inp_flags |= INP_HDRINCL;
 429                         else
 430                                 inp->inp_flags &= ~INP_HDRINCL;
 431                         break;
 432                 case IP_FW_X:
 433                         if (IPFW3_LOADED)
 434                                 error = ip_fw_ctl_x_ptr(sopt);
 435                         else
 436                                  error = ENOPROTOOPT;
 437                         break;
 438                 case IP_FW_ADD:
 439                 case IP_FW_DEL:
 440                 case IP_FW_FLUSH:
 441                 case IP_FW_ZERO:
 442                 case IP_FW_RESETLOG:
 443                         if (IPFW_LOADED)
 444                                 error = ip_fw_ctl_ptr(sopt);
 445                         else
 446                                 error = ENOPROTOOPT;
 447                         break;
 448
 449                 case IP_DUMMYNET_CONFIGURE:
 450                 case IP_DUMMYNET_DEL:
 451                 case IP_DUMMYNET_FLUSH:
 452                         error = ip_dn_sockopt(sopt);
 453                         break ;
 454
 455                 case IP_RSVP_ON:
 456                         error = ip_rsvp_init(so);
 457                         break;
 458
 459                 case IP_RSVP_OFF:
 460                         error = ip_rsvp_done();
 461                         break;
 462
 463                 case IP_RSVP_VIF_ON:
 464                 case IP_RSVP_VIF_OFF:
 465                         error = ip_rsvp_vif ?
 466                                 ip_rsvp_vif(so, sopt) : EINVAL;
 467                         break;
 468
 469                 case MRT_INIT:
 470                 case MRT_DONE:
 471                 case MRT_ADD_VIF:
 472                 case MRT_DEL_VIF:
 473                 case MRT_ADD_MFC:
 474                 case MRT_DEL_MFC:
 475                 case MRT_VERSION:
 476                 case MRT_ASSERT:
 477                 case MRT_API_SUPPORT:
 478                 case MRT_API_CONFIG:
 479                 case MRT_ADD_BW_UPCALL:
 480                 case MRT_DEL_BW_UPCALL:
 481                         error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
 482                                         EOPNOTSUPP;
 483                         break;
 484
 485                 default:
 486                         ip_ctloutput(msg);
 487                         /* msg invalid now */
 488                         return;
 489                 }
 490                 break;
 491         }
 492 done:
 493         lwkt_replymsg(&msg->lmsg, error);
 494 }
 495
 496 /*
 497  * This function exists solely to receive the PRC_IFDOWN messages which
 498  * are sent by if_down().  It looks for an ifaddr whose ifa_addr is sa,
 499  * and calls in_ifadown() to remove all routes corresponding to that address.
 500  * It also receives the PRC_IFUP messages from if_up() and reinstalls the
 501  * interface routes.
 502  */
 503 void
 504 rip_ctlinput(netmsg_t msg)
 505 {
 506         int cmd = msg->ctlinput.nm_cmd;
 507         struct sockaddr *sa = msg->ctlinput.nm_arg;
 508         struct in_ifaddr *ia;
 509         struct in_ifaddr_container *iac;
 510         struct ifnet *ifp;
 511         int err;
 512         int flags;
 513
 514         ASSERT_IN_NETISR(0);
 515
 516         switch (cmd) {
 517         case PRC_IFDOWN:
 518                 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
 519                         ia = iac->ia;
 520
 521                         if (ia->ia_ifa.ifa_addr == sa &&
 522                             (ia->ia_flags & IFA_ROUTE)) {
 523                                 /*
 524                                  * in_ifscrub kills the interface route.
 525                                  */
 526                                 in_ifscrub(ia->ia_ifp, ia);
 527                                 /*
 528                                  * in_ifadown gets rid of all the rest of
 529                                  * the routes.  This is not quite the right
 530                                  * thing to do, but at least if we are running
 531                                  * a routing process they will come back.
 532                                  */
 533                                 in_ifadown(&ia->ia_ifa, 0);
 534                                 break;
 535                         }
 536                 }
 537                 break;
 538
 539         case PRC_IFUP:
 540                 ia = NULL;
 541                 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
 542                         if (iac->ia->ia_ifa.ifa_addr == sa) {
 543                                 ia = iac->ia;
 544                                 break;
 545                         }
 546                 }
 547                 if (ia == NULL || (ia->ia_flags & IFA_ROUTE))
 548                         goto done;
 549                 flags = RTF_UP;
 550                 ifp = ia->ia_ifa.ifa_ifp;
 551
 552 #ifdef CARP
 553                 /*
 554                  * Don't add prefix routes for CARP interfaces.
 555                  * Prefix routes creation is handled by CARP
 556                  * interfaces themselves.
 557                  */
 558                 if (ifp->if_type == IFT_CARP)
 559                         goto done;
 560 #endif
 561
 562                 if ((ifp->if_flags & IFF_LOOPBACK) ||
 563                     (ifp->if_flags & IFF_POINTOPOINT))
 564                         flags |= RTF_HOST;
 565
 566                 err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
 567                 if (err == 0)
 568                         ia->ia_flags |= IFA_ROUTE;
 569                 break;
 570         }
 571 done:
 572         lwkt_replymsg(&msg->lmsg, 0);
 573 }
 574
 575 u_long  rip_sendspace = RIPSNDQ;
 576 u_long  rip_recvspace = RIPRCVQ;
 577
 578 SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
 579     &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
 580 SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
 581     &rip_recvspace, 0, "Maximum incoming raw IP datagram size");
 582
 583 static void
 584 rip_attach(netmsg_t msg)
 585 {
 586         struct socket *so = msg->base.nm_so;
 587         int proto = msg->attach.nm_proto;
 588         struct pru_attach_info *ai = msg->attach.nm_ai;
 589         struct inpcb *inp;
 590         int error;
 591
 592         ASSERT_IN_NETISR(0);
 593
 594         inp = so->so_pcb;
 595         if (inp)
 596                 panic("rip_attach");
 597         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
 598         if (error)
 599                 goto done;
 600
 601         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 602         if (error)
 603                 goto done;
 604
 605         error = in_pcballoc(so, &ripcbinfo);
 606         if (error == 0) {
 607                 inp = (struct inpcb *)so->so_pcb;
 608                 inp->inp_ip_p = proto;
 609                 inp->inp_ip_ttl = ip_defttl;
 610         }
 611 done:
 612         lwkt_replymsg(&msg->lmsg, error);
 613 }
 614
 615 static void
 616 rip_detach(netmsg_t msg)
 617 {
 618         struct socket *so = msg->base.nm_so;
 619         struct inpcb *inp;
 620
 621         ASSERT_IN_NETISR(0);
 622
 623         inp = so->so_pcb;
 624         if (inp == NULL)
 625                 panic("rip_detach");
 626         if (so == ip_mrouter && ip_mrouter_done)
 627                 ip_mrouter_done();
 628         if (ip_rsvp_force_done)
 629                 ip_rsvp_force_done(so);
 630         if (so == ip_rsvpd)
 631                 ip_rsvp_done();
 632         in_pcbdetach(inp);
 633         lwkt_replymsg(&msg->lmsg, 0);
 634 }
 635
 636 static void
 637 rip_abort(netmsg_t msg)
 638 {
 639         /*
 640          * Raw socket does not support listen(2),
 641          * so this should never be called.
 642          */
 643         panic("rip_abort is called");
 644 }
 645
 646 static void
 647 rip_disconnect(netmsg_t msg)
 648 {
 649         struct socket *so = msg->base.nm_so;
 650         int error;
 651
 652         ASSERT_IN_NETISR(0);
 653
 654         if (so->so_state & SS_ISCONNECTED) {
 655                 soisdisconnected(so);
 656                 error = 0;
 657         } else {
 658                 error = ENOTCONN;
 659         }
 660         lwkt_replymsg(&msg->lmsg, error);
 661 }
 662
 663 static void
 664 rip_bind(netmsg_t msg)
 665 {
 666         struct socket *so = msg->base.nm_so;
 667         struct sockaddr *nam = msg->bind.nm_nam;
 668         struct inpcb *inp = so->so_pcb;
 669         struct sockaddr_in *addr = (struct sockaddr_in *)nam;
 670         int error;
 671
 672         ASSERT_IN_NETISR(0);
 673
 674         if (nam->sa_len == sizeof(*addr)) {
 675                 if (ifnet_array_isempty() ||
 676                     ((addr->sin_family != AF_INET) &&
 677                      (addr->sin_family != AF_IMPLINK)) ||
 678                     (addr->sin_addr.s_addr != INADDR_ANY &&
 679                      ifa_ifwithaddr((struct sockaddr *)addr) == 0)) {
 680                         error = EADDRNOTAVAIL;
 681                 } else {
 682                         inp->inp_laddr = addr->sin_addr;
 683                         error = 0;
 684                 }
 685         } else {
 686                 error = EINVAL;
 687         }
 688         lwkt_replymsg(&msg->lmsg, error);
 689 }
 690
 691 static void
 692 rip_connect(netmsg_t msg)
 693 {
 694         struct socket *so = msg->base.nm_so;
 695         struct sockaddr *nam = msg->connect.nm_nam;
 696         struct inpcb *inp = so->so_pcb;
 697         struct sockaddr_in *addr = (struct sockaddr_in *)nam;
 698         int error;
 699
 700         ASSERT_IN_NETISR(0);
 701
 702         if (nam->sa_len != sizeof(*addr)) {
 703                 error = EINVAL;
 704         } else if (ifnet_array_isempty()) {
 705                 error = EADDRNOTAVAIL;
 706         } else {
 707                 if ((addr->sin_family != AF_INET) &&
 708                     (addr->sin_family != AF_IMPLINK)) {
 709                         error = EAFNOSUPPORT;
 710                 } else {
 711                         inp->inp_faddr = addr->sin_addr;
 712                         soisconnected(so);
 713                         error = 0;
 714                 }
 715         }
 716         lwkt_replymsg(&msg->lmsg, error);
 717 }
 718
 719 static void
 720 rip_shutdown(netmsg_t msg)
 721 {
 722         ASSERT_IN_NETISR(0);
 723
 724         socantsendmore(msg->base.nm_so);
 725         lwkt_replymsg(&msg->lmsg, 0);
 726 }
 727
 728 static void
 729 rip_send(netmsg_t msg)
 730 {
 731         struct socket *so = msg->base.nm_so;
 732         struct mbuf *m = msg->send.nm_m;
 733         /*struct mbuf *control = msg->send.nm_control;*/
 734         struct sockaddr *nam = msg->send.nm_addr;
 735         /*int flags = msg->send.nm_flags;*/
 736         struct inpcb *inp = so->so_pcb;
 737         u_long dst;
 738         int error;
 739
 740         ASSERT_IN_NETISR(0);
 741
 742         if (so->so_state & SS_ISCONNECTED) {
 743                 if (nam) {
 744                         m_freem(m);
 745                         error = EISCONN;
 746                 } else {
 747                         dst = inp->inp_faddr.s_addr;
 748                         error = rip_output(m, so, dst);
 749                 }
 750         } else {
 751                 if (nam == NULL) {
 752                         m_freem(m);
 753                         error = ENOTCONN;
 754                 } else {
 755                         dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
 756                         error = rip_output(m, so, dst);
 757                 }
 758         }
 759         lwkt_replymsg(&msg->lmsg, error);
 760 }
 761
 762 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, &ripcbinfo, 1,
 763             in_pcblist_range, "S,xinpcb", "List of active raw IP sockets");
 764
 765 struct pr_usrreqs rip_usrreqs = {
 766         .pru_abort = rip_abort,
 767         .pru_accept = pr_generic_notsupp,
 768         .pru_attach = rip_attach,
 769         .pru_bind = rip_bind,
 770         .pru_connect = rip_connect,
 771         .pru_connect2 = pr_generic_notsupp,
 772         .pru_control = in_control_dispatch,
 773         .pru_detach = rip_detach,
 774         .pru_disconnect = rip_disconnect,
 775         .pru_listen = pr_generic_notsupp,
 776         .pru_peeraddr = in_setpeeraddr_dispatch,
 777         .pru_rcvd = pr_generic_notsupp,
 778         .pru_rcvoob = pr_generic_notsupp,
 779         .pru_send = rip_send,
 780         .pru_sense = pru_sense_null,
 781         .pru_shutdown = rip_shutdown,
 782         .pru_sockaddr = in_setsockaddr_dispatch,
 783         .pru_sosend = sosend,
 784         .pru_soreceive = soreceive
 785 };