bsd/netinet/raw_ip.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1982, 1986, 1988, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  *
  54  *      @(#)raw_ip.c    8.7 (Berkeley) 5/15/95
  55  */
  56
  57 #include <sys/param.h>
  58 #include <sys/systm.h>
  59 #include <sys/kernel.h>
  60 #include <sys/malloc.h>
  61 #include <sys/mbuf.h>
  62 #include <sys/proc.h>
  63 #include <sys/protosw.h>
  64 #include <sys/socket.h>
  65 #include <sys/socketvar.h>
  66 #include <sys/sysctl.h>
  67
  68 #if ISFB31
  69 #include <vm/vm_zone.h>
  70 #endif
  71
  72 #include <net/if.h>
  73 #include <net/route.h>
  74
  75 #define _IP_VHL
  76 #include <netinet/in.h>
  77 #include <netinet/in_systm.h>
  78 #include <netinet/ip.h>
  79 #include <netinet/ip6.h>
  80 #include <netinet6/ip6_var.h>
  81 #include <netinet/in_pcb.h>
  82 #include <netinet/in_var.h>
  83 #include <netinet/ip_var.h>
  84 #include <netinet/ip_mroute.h>
  85
  86 #include <netinet/ip_fw.h>
  87
  88 #if IPSEC
  89 #include <netinet6/ipsec.h>
  90 #endif /*IPSEC*/
  91
  92 #if ISFB31
  93 #include "opt_ipdn.h"
  94 #endif
  95
  96 #if DUMMYNET
  97 #include <netinet/ip_dummynet.h>
  98 #endif
  99 #if !defined(COMPAT_IPFW) || COMPAT_IPFW == 1
 100 #undef COMPAT_IPFW
 101 #define COMPAT_IPFW 1
 102 #else
 103 #undef COMPAT_IPFW
 104 #endif
 105
 106 struct inpcbhead ripcb;
 107 struct inpcbinfo ripcbinfo;
 108
 109 /*
 110  * Nominal space allocated to a raw ip socket.
 111  */
 112 #define RIPSNDQ         8192
 113 #define RIPRCVQ         8192
 114
 115 /*
 116  * Raw interface to IP protocol.
 117  */
 118
 119 /*
 120  * Initialize raw connection block q.
 121  */
 122 void
 123 rip_init()
 124 {
 125         LIST_INIT(&ripcb);
 126         ripcbinfo.listhead = &ripcb;
 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
 135         ripcbinfo.ipi_zone = (void *) zinit(sizeof(struct inpcb),
 136                                             (4096 * sizeof(struct inpcb)),
 137                                             4096, "ripzone");
 138
 139 }
 140
 141 static struct   sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
 142 /*
 143  * Setup generic address and protocol structures
 144  * for raw_input routine, then pass them along with
 145  * mbuf chain.
 146  */
 147 void
 148 rip_input(m, iphlen)
 149         struct mbuf *m;
 150         int iphlen;
 151 {
 152         register struct ip *ip = mtod(m, struct ip *);
 153         register struct inpcb *inp;
 154         struct inpcb *last = 0;
 155         struct mbuf *opts = 0;
 156
 157         ripsrc.sin_addr = ip->ip_src;
 158         LIST_FOREACH(inp, &ripcb, inp_list) {
 159                 if ((inp->inp_vflag & INP_IPV4) == NULL)
 160                         continue;
 161 #warning do something about this
 162                 if (inp->inp_ip_p && inp->inp_ip_p != ip->ip_p)
 163                         continue;
 164                 if (inp->inp_laddr.s_addr &&
 165                   inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
 166                         continue;
 167                 if (inp->inp_faddr.s_addr &&
 168                   inp->inp_faddr.s_addr != ip->ip_src.s_addr)
 169                         continue;
 170                 if (last) {
 171                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 172                         if (n) {
 173                                 if (last->inp_flags & INP_CONTROLOPTS ||
 174                                     last->inp_socket->so_options & SO_TIMESTAMP)
 175                                     ip_savecontrol(last, &opts, ip, n);
 176                 if (last->inp_flags & INP_STRIPHDR) {
 177                     n->m_len -= iphlen;
 178                     n->m_pkthdr.len -= iphlen;
 179                     n->m_data += iphlen;
 180                 }
 181                                 if (sbappendaddr(&last->inp_socket->so_rcv,
 182                                     (struct sockaddr *)&ripsrc, n,
 183                                     opts) == 0) {
 184                                         /* should notify about lost packet */
 185                                     kprintf("rip_input can't append to socket\n");
 186                                         m_freem(n);
 187                                         if (opts)
 188                                             m_freem(opts);
 189                                 } else {
 190                                     /* kprintf("rip_input calling sorwakeup\n"); */
 191                                     sorwakeup(last->inp_socket);
 192                                 }
 193                                 opts = 0;
 194                         }
 195                 }
 196                 last = inp;
 197         }
 198         if (last) {
 199                 if (last->inp_flags & INP_CONTROLOPTS ||
 200                     last->inp_socket->so_options & SO_TIMESTAMP)
 201                         ip_savecontrol(last, &opts, ip, m);
 202         if (last->inp_flags & INP_STRIPHDR) {
 203             m->m_len -= iphlen;
 204             m->m_pkthdr.len -= iphlen;
 205             m->m_data += iphlen;
 206         }
 207                 if (sbappendaddr(&last->inp_socket->so_rcv,
 208                     (struct sockaddr *)&ripsrc, m, opts) == 0) {
 209                     kprintf("rip_input(2) can't append to socket\n");
 210                         m_freem(m);
 211                         if (opts)
 212                             m_freem(opts);
 213                 } else {
 214                     /* kprintf("rip_input calling sorwakeup\n"); */
 215                     sorwakeup(last->inp_socket);
 216                 }
 217         } else {
 218                 m_freem(m);
 219               ipstat.ips_noproto++;
 220               ipstat.ips_delivered--;
 221       }
 222 }
 223
 224 /*
 225  * Generate IP header and pass packet to ip_output.
 226  * Tack on options user may have setup with control call.
 227  */
 228 int
 229 rip_output(m, so, dst)
 230         register struct mbuf *m;
 231         struct socket *so;
 232         u_long dst;
 233 {
 234         register struct ip *ip;
 235         register struct inpcb *inp = sotoinpcb(so);
 236         int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
 237
 238         /*
 239          * If the user handed us a complete IP packet, use it.
 240          * Otherwise, allocate an mbuf for a header and fill it in.
 241          */
 242         if ((inp->inp_flags & INP_HDRINCL) == 0) {
 243                 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
 244                         m_freem(m);
 245                         return(EMSGSIZE);
 246                 }
 247                 M_PREPEND(m, sizeof(struct ip), M_WAIT);
 248                 ip = mtod(m, struct ip *);
 249                 ip->ip_tos = 0;
 250                 ip->ip_off = 0;
 251                 ip->ip_p = inp->inp_ip_p;
 252                 ip->ip_len = m->m_pkthdr.len;
 253                 ip->ip_src = inp->inp_laddr;
 254                 ip->ip_dst.s_addr = dst;
 255                 ip->ip_ttl = MAXTTL;
 256         } else {
 257                 if (m->m_pkthdr.len > IP_MAXPACKET) {
 258                         m_freem(m);
 259                         return(EMSGSIZE);
 260                 }
 261                 ip = mtod(m, struct ip *);
 262                 /* don't allow both user specified and setsockopt options,
 263                    and don't allow packet length sizes that will crash */
 264                 if (((IP_VHL_HL(ip->ip_vhl) != (sizeof (*ip) >> 2))
 265                      && inp->inp_options)
 266                     || (ip->ip_len > m->m_pkthdr.len)
 267                     || (ip->ip_len < (IP_VHL_HL(ip->ip_vhl) << 2))) {
 268                         m_freem(m);
 269                         return EINVAL;
 270                 }
 271                 if (ip->ip_id == 0)
 272                         ip->ip_id = htons(ip_id++);
 273                 /* XXX prevent ip_output from overwriting header fields */
 274                 flags |= IP_RAWOUTPUT;
 275                 ipstat.ips_rawout++;
 276         }
 277
 278 #if IPSEC
 279         m->m_pkthdr.rcvif = (struct ifnet *)so; /*XXX*/
 280 #endif /*IPSEC*/
 281
 282         return (ip_output(m, inp->inp_options, &inp->inp_route, flags,
 283                           inp->inp_moptions));
 284 }
 285
 286 /*
 287  * Raw IP socket option processing.
 288  */
 289 int
 290 rip_ctloutput(so, sopt)
 291         struct socket *so;
 292         struct sockopt *sopt;
 293 {
 294         struct  inpcb *inp = sotoinpcb(so);
 295         int     error, optval;
 296
 297         if (sopt->sopt_level != IPPROTO_IP)
 298                 return (EINVAL);
 299
 300         error = 0;
 301
 302         switch (sopt->sopt_dir) {
 303         case SOPT_GET:
 304                 switch (sopt->sopt_name) {
 305                 case IP_HDRINCL:
 306                         optval = inp->inp_flags & INP_HDRINCL;
 307                         error = sooptcopyout(sopt, &optval, sizeof optval);
 308                         break;
 309
 310         case IP_STRIPHDR:
 311             optval = inp->inp_flags & INP_STRIPHDR;
 312             error = sooptcopyout(sopt, &optval, sizeof optval);
 313             break;
 314
 315 #if COMPAT_IPFW
 316                 case IP_FW_GET:
 317                         if (ip_fw_ctl_ptr == 0)
 318                                 error = ENOPROTOOPT;
 319                         else
 320                                 error = ip_fw_ctl_ptr(sopt);
 321                         break;
 322
 323                 case IP_NAT:
 324                         if (ip_nat_ctl_ptr == 0)
 325                                 error = ENOPROTOOPT;
 326                         else
 327                                 error = ip_nat_ctl_ptr(sopt);
 328                         break;
 329 #if DUMMYNET
 330                 case IP_DUMMYNET_GET:
 331                         if (ip_dn_ctl_ptr == NULL)
 332                                 error = ENOPROTOOPT ;
 333                         else
 334                                 error = ip_dn_ctl_ptr(sopt);
 335                         break ;
 336 #endif /* DUMMYNET */
 337 #endif /* COMPAT_IPFW */
 338
 339                 case MRT_INIT:
 340                 case MRT_DONE:
 341                 case MRT_ADD_VIF:
 342                 case MRT_DEL_VIF:
 343                 case MRT_ADD_MFC:
 344                 case MRT_DEL_MFC:
 345                 case MRT_VERSION:
 346                 case MRT_ASSERT:
 347                         error = ip_mrouter_get(so, sopt);
 348                         break;
 349
 350                 default:
 351                         error = ip_ctloutput(so, sopt);
 352                         break;
 353                 }
 354                 break;
 355
 356         case SOPT_SET:
 357                 switch (sopt->sopt_name) {
 358                 case IP_HDRINCL:
 359                         error = sooptcopyin(sopt, &optval, sizeof optval,
 360                                             sizeof optval);
 361                         if (error)
 362                                 break;
 363                         if (optval)
 364                                 inp->inp_flags |= INP_HDRINCL;
 365                         else
 366                                 inp->inp_flags &= ~INP_HDRINCL;
 367                         break;
 368
 369         case IP_STRIPHDR:
 370             error = sooptcopyin(sopt, &optval, sizeof optval,
 371                         sizeof optval);
 372             if (error)
 373                 break;
 374             if (optval)
 375                 inp->inp_flags |= INP_STRIPHDR;
 376             else
 377                 inp->inp_flags &= ~INP_STRIPHDR;
 378             break;
 379
 380
 381 #if COMPAT_IPFW
 382                 case IP_FW_ADD:
 383                 case IP_FW_DEL:
 384                 case IP_FW_FLUSH:
 385                 case IP_FW_ZERO:
 386                         if (ip_fw_ctl_ptr == 0)
 387                                 error = ENOPROTOOPT;
 388                         else
 389                                 error = ip_fw_ctl_ptr(sopt);
 390                         break;
 391
 392                 case IP_NAT:
 393                         if (ip_nat_ctl_ptr == 0)
 394                                 error = ENOPROTOOPT;
 395                         else
 396                                 error = ip_nat_ctl_ptr(sopt);
 397                         break;
 398 #if DUMMYNET
 399                 case IP_DUMMYNET_CONFIGURE:
 400                 case IP_DUMMYNET_DEL:
 401                 case IP_DUMMYNET_FLUSH:
 402                         if (ip_dn_ctl_ptr == NULL)
 403                                 error = ENOPROTOOPT ;
 404                         else
 405                                 error = ip_dn_ctl_ptr(sopt);
 406                         break ;
 407 #endif
 408 #endif /* COMPAT_IPFW */
 409
 410                 case IP_RSVP_ON:
 411                         error = ip_rsvp_init(so);
 412                         break;
 413
 414                 case IP_RSVP_OFF:
 415                         error = ip_rsvp_done();
 416                         break;
 417
 418                         /* XXX - should be combined */
 419                 case IP_RSVP_VIF_ON:
 420                         error = ip_rsvp_vif_init(so, sopt);
 421                         break;
 422
 423                 case IP_RSVP_VIF_OFF:
 424                         error = ip_rsvp_vif_done(so, sopt);
 425                         break;
 426
 427                 case MRT_INIT:
 428                 case MRT_DONE:
 429                 case MRT_ADD_VIF:
 430                 case MRT_DEL_VIF:
 431                 case MRT_ADD_MFC:
 432                 case MRT_DEL_MFC:
 433                 case MRT_VERSION:
 434                 case MRT_ASSERT:
 435                         error = ip_mrouter_set(so, sopt);
 436                         break;
 437
 438                 default:
 439                         error = ip_ctloutput(so, sopt);
 440                         break;
 441                 }
 442                 break;
 443         }
 444
 445         return (error);
 446 }
 447
 448 /*
 449  * This function exists solely to receive the PRC_IFDOWN messages which
 450  * are sent by if_down().  It looks for an ifaddr whose ifa_addr is sa,
 451  * and calls in_ifadown() to remove all routes corresponding to that address.
 452  * It also receives the PRC_IFUP messages from if_up() and reinstalls the
 453  * interface routes.
 454  */
 455 void
 456 rip_ctlinput(cmd, sa, vip)
 457         int cmd;
 458         struct sockaddr *sa;
 459         void *vip;
 460 {
 461         struct in_ifaddr *ia;
 462         struct ifnet *ifp;
 463         int err;
 464         int flags;
 465
 466         switch (cmd) {
 467         case PRC_IFDOWN:
 468                 for (ia = in_ifaddrhead.tqh_first; ia;
 469                      ia = ia->ia_link.tqe_next) {
 470                         if (ia->ia_ifa.ifa_addr == sa
 471                             && (ia->ia_flags & IFA_ROUTE)) {
 472                                 /*
 473                                  * in_ifscrub kills the interface route.
 474                                  */
 475                                 in_ifscrub(ia->ia_ifp, ia);
 476                                 /*
 477                                  * in_ifadown gets rid of all the rest of
 478                                  * the routes.  This is not quite the right
 479                                  * thing to do, but at least if we are running
 480                                  * a routing process they will come back.
 481                                  */
 482                                 in_ifadown(&ia->ia_ifa);
 483                                 break;
 484                         }
 485                 }
 486                 break;
 487
 488         case PRC_IFUP:
 489                 for (ia = in_ifaddrhead.tqh_first; ia;
 490                      ia = ia->ia_link.tqe_next) {
 491                         if (ia->ia_ifa.ifa_addr == sa)
 492                                 break;
 493                 }
 494                 if (ia == 0 || (ia->ia_flags & IFA_ROUTE))
 495                         return;
 496                 flags = RTF_UP;
 497                 ifp = ia->ia_ifa.ifa_ifp;
 498
 499                 if ((ifp->if_flags & IFF_LOOPBACK)
 500                     || (ifp->if_flags & IFF_POINTOPOINT))
 501                         flags |= RTF_HOST;
 502
 503                 err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
 504                 if (err == 0)
 505                         ia->ia_flags |= IFA_ROUTE;
 506                 break;
 507         }
 508 }
 509
 510 u_long  rip_sendspace = RIPSNDQ;
 511 u_long  rip_recvspace = RIPRCVQ;
 512
 513 SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW, &rip_sendspace,
 514            0, "");
 515 SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW, &rip_recvspace,
 516            0, "");
 517
 518 static int
 519 rip_attach(struct socket *so, int proto, struct proc *p)
 520 {
 521         struct inpcb *inp;
 522         int error, s;
 523
 524         inp = sotoinpcb(so);
 525         if (inp)
 526                 panic("rip_attach");
 527
 528
 529 #if ISFB31
 530                 if (p && (error = suser(p->p_ucred, &p->p_acflag)) != 0)
 531                         return error;
 532 #else
 533                 if ((so->so_state & SS_PRIV) == 0)
 534                         return (EPERM);
 535 #endif
 536
 537         s = splnet();
 538         error = in_pcballoc(so, &ripcbinfo, p);
 539         splx(s);
 540         if (error)
 541                 return error;
 542         error = soreserve(so, rip_sendspace, rip_recvspace);
 543         if (error)
 544                 return error;
 545         inp = (struct inpcb *)so->so_pcb;
 546         inp->inp_vflag |= INP_IPV4;
 547         inp->inp_ip_p = proto;
 548 #if IPSEC
 549         error = ipsec_init_policy(so, &inp->inp_sp);
 550         if (error != 0) {
 551                 in_pcbdetach(inp);
 552                 return error;
 553         }
 554 #endif /*IPSEC*/
 555
 556         return 0;
 557 }
 558
 559 static int
 560 rip_detach(struct socket *so)
 561 {
 562         struct inpcb *inp;
 563
 564         inp = sotoinpcb(so);
 565         if (inp == 0)
 566                 panic("rip_detach");
 567         if (so == ip_mrouter)
 568                 ip_mrouter_done();
 569         ip_rsvp_force_done(so);
 570         if (so == ip_rsvpd)
 571                 ip_rsvp_done();
 572         in_pcbdetach(inp);
 573         return 0;
 574 }
 575
 576 static int
 577 rip_abort(struct socket *so)
 578 {
 579         soisdisconnected(so);
 580         return rip_detach(so);
 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 proc *p)
 593 {
 594         struct inpcb *inp = sotoinpcb(so);
 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 &&
 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 proc *p)
 611 {
 612         struct inpcb *inp = sotoinpcb(so);
 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 proc *p)
 637 {
 638         struct inpcb *inp = sotoinpcb(so);
 639         register 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
 658 static int
 659 rip_pcblist SYSCTL_HANDLER_ARGS
 660 {
 661         int error, i, n, s;
 662         struct inpcb *inp, **inp_list;
 663         inp_gen_t gencnt;
 664         struct xinpgen xig;
 665
 666         /*
 667          * The process of preparing the TCB list is too time-consuming and
 668          * resource-intensive to repeat twice on every request.
 669          */
 670         if (req->oldptr == 0) {
 671                 n = ripcbinfo.ipi_count;
 672                 req->oldidx = 2 * (sizeof xig)
 673                         + (n + n/8) * sizeof(struct xinpcb);
 674                 return 0;
 675         }
 676
 677         if (req->newptr != 0)
 678                 return EPERM;
 679
 680         /*
 681          * OK, now we're committed to doing something.
 682          */
 683         s = splnet();
 684         gencnt = ripcbinfo.ipi_gencnt;
 685         n = ripcbinfo.ipi_count;
 686         splx(s);
 687
 688         xig.xig_len = sizeof xig;
 689         xig.xig_count = n;
 690         xig.xig_gen = gencnt;
 691         xig.xig_sogen = so_gencnt;
 692         error = SYSCTL_OUT(req, &xig, sizeof xig);
 693         if (error)
 694                 return error;
 695         /*
 696          * We are done if there is no pcb
 697          */
 698         if (n == 0)
 699             return 0;
 700
 701         inp_list = _MALLOC(n * sizeof *inp_list, M_TEMP, M_WAITOK);
 702         if (inp_list == 0)
 703                 return ENOMEM;
 704
 705         s = splnet();
 706         for (inp = ripcbinfo.listhead->lh_first, i = 0; inp && i < n;
 707              inp = inp->inp_list.le_next) {
 708                 if (inp->inp_gencnt <= gencnt)
 709                         inp_list[i++] = inp;
 710         }
 711         splx(s);
 712         n = i;
 713
 714         error = 0;
 715         for (i = 0; i < n; i++) {
 716                 inp = inp_list[i];
 717                 if (inp->inp_gencnt <= gencnt) {
 718                         struct xinpcb xi;
 719                         xi.xi_len = sizeof xi;
 720                         /* XXX should avoid extra copy */
 721                         bcopy(inp, &xi.xi_inp, sizeof *inp);
 722                         if (inp->inp_socket)
 723                                 sotoxsocket(inp->inp_socket, &xi.xi_socket);
 724                         error = SYSCTL_OUT(req, &xi, sizeof xi);
 725                 }
 726         }
 727         if (!error) {
 728                 /*
 729                  * Give the user an updated idea of our state.
 730                  * If the generation differs from what we told
 731                  * her before, she knows that something happened
 732                  * while we were processing this request, and it
 733                  * might be necessary to retry.
 734                  */
 735                 s = splnet();
 736                 xig.xig_gen = ripcbinfo.ipi_gencnt;
 737                 xig.xig_sogen = so_gencnt;
 738                 xig.xig_count = ripcbinfo.ipi_count;
 739                 splx(s);
 740                 error = SYSCTL_OUT(req, &xig, sizeof xig);
 741         }
 742         FREE(inp_list, M_TEMP);
 743         return error;
 744 }
 745
 746
 747 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, 0, 0,
 748             rip_pcblist, "S,xinpcb", "List of active raw IP sockets");
 749
 750 struct pr_usrreqs rip_usrreqs = {
 751         rip_abort, pru_accept_notsupp, rip_attach, rip_bind, rip_connect,
 752         pru_connect2_notsupp, in_control, rip_detach, rip_disconnect,
 753         pru_listen_notsupp, in_setpeeraddr, pru_rcvd_notsupp,
 754         pru_rcvoob_notsupp, rip_send, pru_sense_null, rip_shutdown,
 755         in_setsockaddr, sosend, soreceive, sopoll
 756 };