src/main/listen.c

   1 /*
   2  * listen.c     Handle socket stuff
   3  *
   4  * Version:     $Id$
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * Copyright 2005,2006  The FreeRADIUS server project
  21  * Copyright 2005  Alan DeKok <aland@ox.org>
  22  */
  23
  24 #include <freeradius-devel/ident.h>
  25 RCSID("$Id$")
  26
  27 #include <freeradius-devel/radiusd.h>
  28 #include <freeradius-devel/modules.h>
  29 #include <freeradius-devel/rad_assert.h>
  30 #include <freeradius-devel/vqp.h>
  31 #include <freeradius-devel/dhcp.h>
  32 #include <freeradius-devel/process.h>
  33
  34 #include <freeradius-devel/vmps.h>
  35 #include <freeradius-devel/detail.h>
  36
  37 #ifdef WITH_UDPFROMTO
  38 #include <freeradius-devel/udpfromto.h>
  39 #endif
  40
  41 #ifdef HAVE_SYS_RESOURCE_H
  42 #include <sys/resource.h>
  43 #endif
  44
  45 #ifdef HAVE_NET_IF_H
  46 #include <net/if.h>
  47 #endif
  48
  49 #ifdef HAVE_FCNTL_H
  50 #include <fcntl.h>
  51 #endif
  52
  53
  54 static void print_packet(RADIUS_PACKET *packet)
  55 {
  56         char src[256], dst[256];
  57
  58         ip_ntoh(&packet->src_ipaddr, src, sizeof(src));
  59         ip_ntoh(&packet->dst_ipaddr, dst, sizeof(dst));
  60
  61         fprintf(stderr, "ID %d: %s %d -> %s %d\n", packet->id,
  62                 src, packet->src_port, dst, packet->dst_port);
  63
  64 }
  65
  66
  67 /*
  68  *      We'll use this below.
  69  */
  70 typedef int (*rad_listen_parse_t)(CONF_SECTION *, rad_listen_t *);
  71 typedef void (*rad_listen_free_t)(rad_listen_t *);
  72
  73 typedef struct rad_listen_master_t {
  74         rad_listen_parse_t      parse;
  75         rad_listen_free_t       free;
  76         rad_listen_recv_t       recv;
  77         rad_listen_send_t       send;
  78         rad_listen_print_t      print;
  79         rad_listen_encode_t     encode;
  80         rad_listen_decode_t     decode;
  81 } rad_listen_master_t;
  82
  83 static rad_listen_t *listen_alloc(RAD_LISTEN_TYPE type);
  84
  85 /*
  86  *      Xlat for %{listen:foo}
  87  */
  88 static size_t xlat_listen(UNUSED void *instance, REQUEST *request,
  89                        char *fmt, char *out,
  90                        size_t outlen,
  91                        UNUSED RADIUS_ESCAPE_STRING func)
  92 {
  93         const char *value = NULL;
  94         CONF_PAIR *cp;
  95
  96         if (!fmt || !out || (outlen < 1)) return 0;
  97
  98         if (!request || !request->listener) {
  99                 *out = '\0';
 100                 return 0;
 101         }
 102
 103         cp = cf_pair_find(request->listener->cs, fmt);
 104         if (!cp || !(value = cf_pair_value(cp))) {
 105                 *out = '\0';
 106                 return 0;
 107         }
 108
 109         strlcpy(out, value, outlen);
 110
 111         return strlen(out);
 112 }
 113
 114 /*
 115  *      Find a per-socket client.
 116  */
 117 RADCLIENT *client_listener_find(rad_listen_t *listener,
 118                                 const fr_ipaddr_t *ipaddr, int src_port)
 119 {
 120 #ifdef WITH_DYNAMIC_CLIENTS
 121         int rcode;
 122         REQUEST *request;
 123         RADCLIENT *created;
 124 #endif
 125         time_t now;
 126         RADCLIENT *client;
 127         RADCLIENT_LIST *clients;
 128         listen_socket_t *sock;
 129
 130         rad_assert(listener != NULL);
 131         rad_assert(ipaddr != NULL);
 132
 133         sock = listener->data;
 134         clients = sock->clients;
 135
 136         /*
 137          *      This HAS to have been initialized previously.
 138          */
 139         rad_assert(clients != NULL);
 140
 141         client = client_find(clients, ipaddr,sock->proto);
 142         if (!client) {
 143                 char name[256], buffer[128];
 144
 145 #ifdef WITH_DYNAMIC_CLIENTS
 146         unknown:                /* used only for dynamic clients */
 147 #endif
 148
 149                 /*
 150                  *      DoS attack quenching, but only in daemon mode.
 151                  *      If they're running in debug mode, show them
 152                  *      every packet.
 153                  */
 154                 if (debug_flag == 0) {
 155                         static time_t last_printed = 0;
 156
 157                         now = time(NULL);
 158                         if (last_printed == now) return NULL;
 159
 160                         last_printed = now;
 161                 }
 162
 163                 listener->print(listener, name, sizeof(name));
 164
 165                 radlog(L_ERR, "Ignoring request to %s from unknown client %s port %d"
 166 #ifdef WITH_TCP
 167                        " proto %s"
 168 #endif
 169                        , name, inet_ntop(ipaddr->af, &ipaddr->ipaddr,
 170                                          buffer, sizeof(buffer)), src_port
 171 #ifdef WITH_TCP
 172                        , (sock->proto == IPPROTO_UDP) ? "udp" : "tcp"
 173 #endif
 174                        );
 175                 return NULL;
 176         }
 177
 178 #ifndef WITH_DYNAMIC_CLIENTS
 179         return client;          /* return the found client. */
 180 #else
 181
 182         /*
 183          *      No server defined, and it's not dynamic.  Return it.
 184          */
 185         if (!client->client_server && !client->dynamic) return client;
 186
 187         now = time(NULL);
 188
 189         /*
 190          *      It's a dynamically generated client, check it.
 191          */
 192         if (client->dynamic && (src_port != 0)) {
 193                 /*
 194                  *      Lives forever.  Return it.
 195                  */
 196                 if (client->lifetime == 0) return client;
 197
 198                 /*
 199                  *      Rate-limit the deletion of known clients.
 200                  *      This makes them last a little longer, but
 201                  *      prevents the server from melting down if (say)
 202                  *      10k clients all expire at once.
 203                  */
 204                 if (now == client->last_new_client) return client;
 205
 206                 /*
 207                  *      It's not dead yet.  Return it.
 208                  */
 209                 if ((client->created + client->lifetime) > now) return client;
 210
 211                 /*
 212                  *      This really puts them onto a queue for later
 213                  *      deletion.
 214                  */
 215                 client_delete(clients, client);
 216
 217                 /*
 218                  *      Go find the enclosing network again.
 219                  */
 220                 client = client_find(clients, ipaddr, sock->proto);
 221
 222                 /*
 223                  *      WTF?
 224                  */
 225                 if (!client) goto unknown;
 226                 if (!client->client_server) goto unknown;
 227
 228                 /*
 229                  *      At this point, 'client' is the enclosing
 230                  *      network that configures where dynamic clients
 231                  *      can be defined.
 232                  */
 233                 rad_assert(client->dynamic == 0);
 234
 235         } else if (!client->dynamic && client->rate_limit) {
 236                 /*
 237                  *      The IP is unknown, so we've found an enclosing
 238                  *      network.  Enable DoS protection.  We only
 239                  *      allow one new client per second.  Known
 240                  *      clients aren't subject to this restriction.
 241                  */
 242                 if (now == client->last_new_client) goto unknown;
 243         }
 244
 245         client->last_new_client = now;
 246
 247         request = request_alloc();
 248         if (!request) goto unknown;
 249
 250         request->listener = listener;
 251         request->client = client;
 252         request->packet = rad_recv(listener->fd, 0x02); /* MSG_PEEK */
 253         if (!request->packet) {                         /* badly formed, etc */
 254                 request_free(&request);
 255                 goto unknown;
 256         }
 257         request->reply = rad_alloc_reply(request->packet);
 258         if (!request->reply) {
 259                 request_free(&request);
 260                 goto unknown;
 261         }
 262         gettimeofday(&request->packet->timestamp, NULL);
 263         request->number = 0;
 264         request->priority = listener->type;
 265         request->server = client->client_server;
 266         request->root = &mainconfig;
 267
 268         /*
 269          *      Run a fake request through the given virtual server.
 270          *      Look for FreeRADIUS-Client-IP-Address
 271          *               FreeRADIUS-Client-Secret
 272          *              ...
 273          *
 274          *      and create the RADCLIENT structure from that.
 275          */
 276         DEBUG("server %s {", request->server);
 277
 278         rcode = module_authorize(0, request);
 279
 280         DEBUG("} # server %s", request->server);
 281
 282         if (rcode != RLM_MODULE_OK) {
 283                 request_free(&request);
 284                 goto unknown;
 285         }
 286
 287         /*
 288          *      If the client was updated by rlm_dynamic_clients,
 289          *      don't create the client from attribute-value pairs.
 290          */
 291         if (request->client == client) {
 292                 created = client_create(clients, request);
 293         } else {
 294                 created = request->client;
 295
 296                 /*
 297                  *      This frees the client if it isn't valid.
 298                  */
 299                 if (!client_validate(clients, client, created)) goto unknown;
 300         }
 301
 302         request->server = client->server;
 303         exec_trigger(request, NULL, "server.client.add");
 304
 305         request_free(&request);
 306
 307         if (!created) goto unknown;
 308
 309         return created;
 310 #endif
 311 }
 312
 313 static int listen_bind(rad_listen_t *this);
 314
 315
 316 /*
 317  *      Process and reply to a server-status request.
 318  *      Like rad_authenticate and rad_accounting this should
 319  *      live in it's own file but it's so small we don't bother.
 320  */
 321 int rad_status_server(REQUEST *request)
 322 {
 323         int rcode = RLM_MODULE_OK;
 324         DICT_VALUE *dval;
 325
 326         switch (request->listener->type) {
 327 #ifdef WITH_STATS
 328         case RAD_LISTEN_NONE:
 329 #endif
 330         case RAD_LISTEN_AUTH:
 331                 dval = dict_valbyname(PW_AUTZ_TYPE, 0, "Status-Server");
 332                 if (dval) {
 333                         rcode = module_authorize(dval->value, request);
 334                 } else {
 335                         rcode = RLM_MODULE_OK;
 336                 }
 337
 338                 switch (rcode) {
 339                 case RLM_MODULE_OK:
 340                 case RLM_MODULE_UPDATED:
 341                         request->reply->code = PW_AUTHENTICATION_ACK;
 342                         break;
 343
 344                 case RLM_MODULE_FAIL:
 345                 case RLM_MODULE_HANDLED:
 346                         request->reply->code = 0; /* don't reply */
 347                         break;
 348
 349                 default:
 350                 case RLM_MODULE_REJECT:
 351                         request->reply->code = PW_AUTHENTICATION_REJECT;
 352                         break;
 353                 }
 354                 break;
 355
 356 #ifdef WITH_ACCOUNTING
 357         case RAD_LISTEN_ACCT:
 358                 dval = dict_valbyname(PW_ACCT_TYPE, 0, "Status-Server");
 359                 if (dval) {
 360                         rcode = module_accounting(dval->value, request);
 361                 } else {
 362                         rcode = RLM_MODULE_OK;
 363                 }
 364
 365                 switch (rcode) {
 366                 case RLM_MODULE_OK:
 367                 case RLM_MODULE_UPDATED:
 368                         request->reply->code = PW_ACCOUNTING_RESPONSE;
 369                         break;
 370
 371                 default:
 372                         request->reply->code = 0; /* don't reply */
 373                         break;
 374                 }
 375                 break;
 376 #endif
 377
 378 #ifdef WITH_COA
 379                 /*
 380                  *      This is a vendor extension.  Suggested by Glen
 381                  *      Zorn in IETF 72, and rejected by the rest of
 382                  *      the WG.  We like it, so it goes in here.
 383                  */
 384         case RAD_LISTEN_COA:
 385                 dval = dict_valbyname(PW_RECV_COA_TYPE, 0, "Status-Server");
 386                 if (dval) {
 387                         rcode = module_recv_coa(dval->value, request);
 388                 } else {
 389                         rcode = RLM_MODULE_OK;
 390                 }
 391
 392                 switch (rcode) {
 393                 case RLM_MODULE_OK:
 394                 case RLM_MODULE_UPDATED:
 395                         request->reply->code = PW_COA_ACK;
 396                         break;
 397
 398                 default:
 399                         request->reply->code = 0; /* don't reply */
 400                         break;
 401                 }
 402                 break;
 403 #endif
 404
 405         default:
 406                 return 0;
 407         }
 408
 409 #ifdef WITH_STATS
 410         /*
 411          *      Full statistics are available only on a statistics
 412          *      socket.
 413          */
 414         if (request->listener->type == RAD_LISTEN_NONE) {
 415                 request_stats_reply(request);
 416         }
 417 #endif
 418
 419         return 0;
 420 }
 421
 422 #ifdef WITH_TCP
 423 static int dual_tcp_recv(rad_listen_t *listener)
 424 {
 425         int rcode;
 426         RADIUS_PACKET   *packet;
 427         RAD_REQUEST_FUNP fun = NULL;
 428         listen_socket_t *sock = listener->data;
 429         RADCLIENT       *client = sock->client;
 430
 431         /*
 432          *      Allocate a packet for partial reads.
 433          */
 434         if (!sock->packet) {
 435                 sock->packet = rad_alloc(0);
 436                 if (!sock->packet) return 0;
 437
 438                 sock->packet->sockfd = listener->fd;
 439                 sock->packet->src_ipaddr = sock->other_ipaddr;
 440                 sock->packet->src_port = sock->other_port;
 441                 sock->packet->dst_ipaddr = sock->my_ipaddr;
 442                 sock->packet->dst_port = sock->my_port;
 443         }
 444
 445         /*
 446          *      Grab the packet currently being processed.
 447          */
 448         packet = sock->packet;
 449
 450         rcode = fr_tcp_read_packet(packet, 0);
 451
 452         /*
 453          *      Still only a partial packet.  Put it back, and return,
 454          *      so that we'll read more data when it's ready.
 455          */
 456         if (rcode == 0) {
 457                 return 0;
 458         }
 459
 460         if (rcode == -1) {      /* error reading packet */
 461                 char buffer[256];
 462
 463                 radlog(L_ERR, "Invalid packet from %s port %d: closing socket",
 464                        ip_ntoh(&packet->src_ipaddr, buffer, sizeof(buffer)),
 465                        packet->src_port);
 466         }
 467
 468         if (rcode < 0) {        /* error or connection reset */
 469                 listener->status = RAD_LISTEN_STATUS_REMOVE_FD;
 470
 471                 /*
 472                  *      Decrement the number of connections.
 473                  */
 474                 if (sock->parent->num_connections > 0) {
 475                         sock->parent->num_connections--;
 476                 }
 477                 if (sock->client->num_connections > 0) {
 478                         sock->client->num_connections--;
 479                 }
 480
 481                 /*
 482                  *      Tell the event handler that an FD has disappeared.
 483                  */
 484                 DEBUG("Client has closed connection");
 485                 event_new_fd(listener);
 486
 487                 /*
 488                  *      Do NOT free the listener here.  It's in use by
 489                  *      a request, and will need to hang around until
 490                  *      all of the requests are done.
 491                  *
 492                  *      It is instead free'd in remove_from_request_hash()
 493                  */
 494                 return 0;
 495         }
 496
 497         /*
 498          *      Some sanity checks, based on the packet code.
 499          */
 500         switch(packet->code) {
 501         case PW_AUTHENTICATION_REQUEST:
 502                 if (listener->type != RAD_LISTEN_AUTH) goto bad_packet;
 503                 FR_STATS_INC(auth, total_requests);
 504                 fun = rad_authenticate;
 505                 break;
 506
 507 #ifdef WITH_ACCOUNTING
 508         case PW_ACCOUNTING_REQUEST:
 509                 if (listener->type != RAD_LISTEN_ACCT) goto bad_packet;
 510                 FR_STATS_INC(acct, total_requests);
 511                 fun = rad_accounting;
 512                 break;
 513 #endif
 514
 515         case PW_STATUS_SERVER:
 516                 if (!mainconfig.status_server) {
 517                         FR_STATS_INC(auth, total_unknown_types);
 518                         DEBUG("WARNING: Ignoring Status-Server request due to security configuration");
 519                         rad_free(&sock->packet);
 520                         return 0;
 521                 }
 522                 fun = rad_status_server;
 523                 break;
 524
 525         default:
 526         bad_packet:
 527                 FR_STATS_INC(auth, total_unknown_types);
 528
 529                 DEBUG("Invalid packet code %d sent from client %s port %d : IGNORED",
 530                       packet->code, client->shortname, packet->src_port);
 531                 rad_free(&sock->packet);
 532                 return 0;
 533         } /* switch over packet types */
 534
 535         if (!request_receive(listener, packet, client, fun)) {
 536                 FR_STATS_INC(auth, total_packets_dropped);
 537                 rad_free(&sock->packet);
 538                 return 0;
 539         }
 540
 541         sock->packet = NULL;    /* we have no need for more partial reads */
 542         return 1;
 543 }
 544
 545 static int dual_tcp_accept(rad_listen_t *listener)
 546 {
 547         int newfd, src_port;
 548         rad_listen_t *this;
 549         socklen_t salen;
 550         struct sockaddr_storage src;
 551         listen_socket_t *sock;
 552         fr_ipaddr_t src_ipaddr;
 553         RADCLIENT *client = NULL;
 554
 555         salen = sizeof(src);
 556
 557         DEBUG2(" ... new connection request on TCP socket.");
 558
 559         newfd = accept(listener->fd, (struct sockaddr *) &src, &salen);
 560         if (newfd < 0) {
 561                 /*
 562                  *      Non-blocking sockets must handle this.
 563                  */
 564                 if (errno == EWOULDBLOCK) {
 565                         return 0;
 566                 }
 567
 568                 DEBUG2(" ... failed to accept connection.");
 569                 return -1;
 570         }
 571
 572         if (!fr_sockaddr2ipaddr(&src, salen, &src_ipaddr, &src_port)) {
 573                 DEBUG2(" ... unknown address family.");
 574                 return 0;
 575         }
 576
 577         /*
 578          *      Enforce client IP address checks on accept, not on
 579          *      every packet.
 580          */
 581         if ((client = client_listener_find(listener,
 582                                            &src_ipaddr, src_port)) == NULL) {
 583                 close(newfd);
 584                 FR_STATS_INC(auth, total_invalid_requests);
 585                 return 0;
 586         }
 587
 588         /*
 589          *      Enforce max_connectionsx on client && listen section.
 590          */
 591         if ((client->max_connections != 0) &&
 592             (client->max_connections == client->num_connections)) {
 593                 /*
 594                  *      FIXME: Print client IP/port, and server IP/port.
 595                  */
 596                 radlog(L_INFO, "Ignoring new connection due to client max_connections (%d)", client->max_connections);
 597                 close(newfd);
 598                 return 0;
 599         }
 600
 601         sock = listener->data;
 602         if ((sock->max_connections != 0) &&
 603             (sock->max_connections == sock->num_connections)) {
 604                 /*
 605                  *      FIXME: Print client IP/port, and server IP/port.
 606                  */
 607                 radlog(L_INFO, "Ignoring new connection due to socket max_connections");
 608                 close(newfd);
 609                 return 0;
 610         }
 611         client->num_connections++;
 612         sock->num_connections++;
 613
 614         /*
 615          *      Add the new listener.
 616          */
 617         this = listen_alloc(listener->type);
 618         if (!this) return -1;
 619
 620         /*
 621          *      Copy everything, including the pointer to the socket
 622          *      information.
 623          */
 624         sock = this->data;
 625         memcpy(this->data, listener->data, sizeof(*sock));
 626         memcpy(this, listener, sizeof(*this));
 627         this->next = NULL;
 628         this->data = sock;      /* fix it back */
 629
 630         sock->parent = listener->data;
 631         sock->other_ipaddr = src_ipaddr;
 632         sock->other_port = src_port;
 633         sock->client = client;
 634
 635         this->fd = newfd;
 636         this->status = RAD_LISTEN_STATUS_INIT;
 637         this->recv = dual_tcp_recv;
 638
 639 #ifdef WITH_TLS
 640         if (this->tls) {
 641                 this->recv = dual_tls_recv;
 642                 this->send = dual_tls_send;
 643         }
 644 #endif
 645
 646         /*
 647          *      FIXME: set O_NONBLOCK on the accept'd fd.
 648          *      See djb's portability rants for details.
 649          */
 650
 651         /*
 652          *      Tell the event loop that we have a new FD.
 653          *      This can be called from a child thread...
 654          */
 655         event_new_fd(this);
 656
 657         return 0;
 658 }
 659 #endif
 660
 661
 662 /*
 663  *      This function is stupid and complicated.
 664  */
 665 static int socket_print(const rad_listen_t *this, char *buffer, size_t bufsize)
 666 {
 667         size_t len;
 668         listen_socket_t *sock = this->data;
 669         const char *name;
 670
 671         switch (this->type) {
 672 #ifdef WITH_STATS
 673         case RAD_LISTEN_NONE:   /* what a hack... */
 674                 name = "status";
 675                 break;
 676 #endif
 677
 678         case RAD_LISTEN_AUTH:
 679                 name = "authentication";
 680                 break;
 681
 682 #ifdef WITH_ACCOUNTING
 683         case RAD_LISTEN_ACCT:
 684                 name = "accounting";
 685                 break;
 686 #endif
 687
 688 #ifdef WITH_PROXY
 689         case RAD_LISTEN_PROXY:
 690                 name = "proxy";
 691                 break;
 692 #endif
 693
 694 #ifdef WITH_VMPS
 695         case RAD_LISTEN_VQP:
 696                 name = "vmps";
 697                 break;
 698 #endif
 699
 700 #ifdef WITH_DHCP
 701         case RAD_LISTEN_DHCP:
 702                 name = "dhcp";
 703                 break;
 704 #endif
 705
 706 #ifdef WITH_COA
 707         case RAD_LISTEN_COA:
 708                 name = "coa";
 709                 break;
 710 #endif
 711
 712         default:
 713                 name = "??";
 714                 break;
 715         }
 716
 717 #define FORWARD len = strlen(buffer); if (len >= (bufsize + 1)) return 0;buffer += len;bufsize -= len
 718 #define ADDSTRING(_x) strlcpy(buffer, _x, bufsize);FORWARD
 719
 720         ADDSTRING(name);
 721
 722         if (sock->interface) {
 723                 ADDSTRING(" interface ");
 724                 ADDSTRING(sock->interface);
 725         }
 726
 727 #ifdef WITH_TCP
 728         if (this->recv == dual_tcp_accept) {
 729                 ADDSTRING(" proto tcp");
 730         }
 731 #endif
 732
 733 #ifdef WITH_TCP
 734         /*
 735          *      TCP sockets get printed a little differently, to make
 736          *      it clear what's going on.
 737          */
 738         if (sock->client) {
 739                 ADDSTRING(" from client (");
 740                 ip_ntoh(&sock->other_ipaddr, buffer, bufsize);
 741                 FORWARD;
 742
 743                 ADDSTRING(", ");
 744                 snprintf(buffer, bufsize, "%d", sock->other_port);
 745                 FORWARD;
 746                 ADDSTRING(") -> (");
 747
 748                 if ((sock->my_ipaddr.af == AF_INET) &&
 749                     (sock->my_ipaddr.ipaddr.ip4addr.s_addr == htonl(INADDR_ANY))) {
 750                         strlcpy(buffer, "*", bufsize);
 751                 } else {
 752                         ip_ntoh(&sock->my_ipaddr, buffer, bufsize);
 753                 }
 754                 FORWARD;
 755
 756                 ADDSTRING(", ");
 757                 snprintf(buffer, bufsize, "%d", sock->my_port);
 758                 FORWARD;
 759
 760                 if (this->server) {
 761                         ADDSTRING(", virtual-server=");
 762                         ADDSTRING(this->server);
 763                 }
 764
 765                 ADDSTRING(")");
 766
 767                 return 1;
 768         }
 769
 770 #ifdef WITH_PROXY
 771         /*
 772          *      Maybe it's a socket that we opened to a home server.
 773          */
 774         if ((sock->proto == IPPROTO_TCP) &&
 775             (this->type == RAD_LISTEN_PROXY)) {
 776                 ADDSTRING(" (");
 777                 ip_ntoh(&sock->my_ipaddr, buffer, bufsize);
 778                 FORWARD;
 779
 780                 ADDSTRING(", ");
 781                 snprintf(buffer, bufsize, "%d", sock->my_port);
 782                 FORWARD;
 783                 ADDSTRING(") -> home_server (");
 784
 785                 if ((sock->other_ipaddr.af == AF_INET) &&
 786                     (sock->other_ipaddr.ipaddr.ip4addr.s_addr == htonl(INADDR_ANY))) {
 787                         strlcpy(buffer, "*", bufsize);
 788                 } else {
 789                         ip_ntoh(&sock->other_ipaddr, buffer, bufsize);
 790                 }
 791                 FORWARD;
 792
 793                 ADDSTRING(", ");
 794                 snprintf(buffer, bufsize, "%d", sock->other_port);
 795                 FORWARD;
 796
 797                 ADDSTRING(")");
 798
 799                 return 1;
 800         }
 801 #endif  /* WITH_PROXY */
 802 #endif  /* WITH_TCP */
 803
 804         ADDSTRING(" address ");
 805
 806         if ((sock->my_ipaddr.af == AF_INET) &&
 807             (sock->my_ipaddr.ipaddr.ip4addr.s_addr == htonl(INADDR_ANY))) {
 808                 strlcpy(buffer, "*", bufsize);
 809         } else {
 810                 ip_ntoh(&sock->my_ipaddr, buffer, bufsize);
 811         }
 812         FORWARD;
 813
 814         ADDSTRING(" port ");
 815         snprintf(buffer, bufsize, "%d", sock->my_port);
 816         FORWARD;
 817
 818         if (this->tls) {
 819                 ADDSTRING(" (TLS)");
 820                 FORWARD;
 821         }
 822
 823         if (this->server) {
 824                 ADDSTRING(" as server ");
 825                 ADDSTRING(this->server);
 826         }
 827
 828 #undef ADDSTRING
 829 #undef FORWARD
 830
 831         return 1;
 832 }
 833
 834 extern int check_config;        /* radiusd.c */
 835
 836
 837 /*
 838  *      Parse an authentication or accounting socket.
 839  */
 840 static int common_socket_parse(CONF_SECTION *cs, rad_listen_t *this)
 841 {
 842         int             rcode;
 843         int             listen_port;
 844         fr_ipaddr_t     ipaddr;
 845         listen_socket_t *sock = this->data;
 846         char            *section_name = NULL;
 847         CONF_SECTION    *client_cs, *parentcs;
 848
 849         this->cs = cs;
 850
 851         /*
 852          *      Try IPv4 first
 853          */
 854         ipaddr.ipaddr.ip4addr.s_addr = htonl(INADDR_NONE);
 855         rcode = cf_item_parse(cs, "ipaddr", PW_TYPE_IPADDR,
 856                               &ipaddr.ipaddr.ip4addr, NULL);
 857         if (rcode < 0) return -1;
 858
 859         if (rcode == 0) { /* successfully parsed IPv4 */
 860                 ipaddr.af = AF_INET;
 861
 862         } else {        /* maybe IPv6? */
 863                 rcode = cf_item_parse(cs, "ipv6addr", PW_TYPE_IPV6ADDR,
 864                                       &ipaddr.ipaddr.ip6addr, NULL);
 865                 if (rcode < 0) return -1;
 866
 867                 if (rcode == 1) {
 868                         cf_log_err(cf_sectiontoitem(cs),
 869                                    "No address specified in listen section");
 870                         return -1;
 871                 }
 872                 ipaddr.af = AF_INET6;
 873         }
 874
 875         rcode = cf_item_parse(cs, "port", PW_TYPE_INTEGER,
 876                               &listen_port, "0");
 877         if (rcode < 0) return -1;
 878
 879         if ((listen_port < 0) || (listen_port > 65535)) {
 880                         cf_log_err(cf_sectiontoitem(cs),
 881                                    "Invalid value for \"port\"");
 882                         return -1;
 883         }
 884
 885         sock->proto = IPPROTO_UDP;
 886
 887         if (cf_pair_find(cs, "proto")) {
 888 #ifndef WITH_TCP
 889                 cf_log_err(cf_sectiontoitem(cs),
 890                            "System does not support the TCP protocol.  Delete this line from the configuration file.");
 891                 return -1;
 892 #else
 893                 char *proto = NULL;
 894 #ifdef WITH_TLS
 895                 CONF_SECTION *tls;
 896 #endif
 897
 898                 rcode = cf_item_parse(cs, "proto", PW_TYPE_STRING_PTR,
 899                                       &proto, "udp");
 900                 if (rcode < 0) return -1;
 901
 902                 if (strcmp(proto, "udp") == 0) {
 903                         sock->proto = IPPROTO_UDP;
 904
 905                 } else if (strcmp(proto, "tcp") == 0) {
 906                         sock->proto = IPPROTO_TCP;
 907
 908                         rcode = cf_item_parse(cs, "max_connections", PW_TYPE_INTEGER,
 909                                               &sock->max_connections, "64");
 910                         if (rcode < 0) return -1;
 911
 912                 } else {
 913                         cf_log_err(cf_sectiontoitem(cs),
 914                                    "Unknown proto name \"%s\"", proto);
 915                         free(proto);
 916                         return -1;
 917                 }
 918                 free(proto);
 919
 920                 /*
 921                  *      TCP requires a destination IP for sockets.
 922                  *      UDP doesn't, so it's allowed.
 923                  */
 924 #ifdef WITH_PROXY
 925                 if ((this->type == RAD_LISTEN_PROXY) &&
 926                     (sock->proto != IPPROTO_UDP)) {
 927                         cf_log_err(cf_sectiontoitem(cs),
 928                                    "Proxy listeners can only listen on proto = udp");
 929                         return -1;
 930                 }
 931 #endif  /* WITH_PROXY */
 932
 933 #ifdef WITH_TLS
 934                 tls = cf_section_sub_find(cs, "tls");
 935
 936                 /*
 937                  *      Don't allow TLS configurations for UDP sockets.
 938                  */
 939                 if (sock->proto != IPPROTO_TCP) {
 940                         cf_log_err(cf_sectiontoitem(cs),
 941                                    "TLS transport is not available for UDP sockets.");
 942                         return -1;
 943                 }
 944
 945                 if (tls) {
 946                         /*
 947                          *      FIXME: Make this better.
 948                          */
 949                         if (listen_port == 0) listen_port = 2083;
 950
 951                         this->tls = tls_server_conf_parse(tls);
 952                         if (!this->tls) {
 953                                 return -1;
 954                         }
 955
 956 #ifdef HAVE_PTRHEAD_H
 957                         if (pthread_mutex_init(&sock->mutex, NULL) < 0) {
 958                                 rad_assert(0 == 1);
 959                                 listen_free(&this);
 960                                 return 0;
 961                         }
 962 #endif
 963
 964                 }
 965 #else  /* WITH_TLS */
 966                 /*
 967                  *      Built without TLS.  Disallow it.
 968                  */
 969                 if (cf_section_sub_find(cs, "tls")) {
 970                         cf_log_err(cf_sectiontoitem(cs),
 971                                    "TLS transport is not available in this executable.");
 972                         return -1;
 973                 }
 974 #endif  /* WITH_TLS */
 975
 976 #endif  /* WITH_TCP */
 977
 978                 /*
 979                  *      No "proto" field.  Disallow TLS.
 980                  */
 981         } else if (cf_section_sub_find(cs, "tls")) {
 982                 cf_log_err(cf_sectiontoitem(cs),
 983                            "TLS transport is not available in this \"listen\" section.");
 984                 return -1;
 985         }
 986
 987         sock->my_ipaddr = ipaddr;
 988         sock->my_port = listen_port;
 989
 990 #ifdef WITH_PROXY
 991         if (check_config) {
 992                 if (home_server_find(&sock->my_ipaddr, sock->my_port, sock->proto)) {
 993                                 char buffer[128];
 994
 995                                 DEBUG("ERROR: We have been asked to listen on %s port %d, which is also listed as a home server.  This can create a proxy loop.",
 996                                       ip_ntoh(&sock->my_ipaddr, buffer, sizeof(buffer)),
 997                                       sock->my_port);
 998                                 return -1;
 999                 }
1000
1001                 return 0;       /* don't do anything */
1002         }
1003 #endif
1004
1005         /*
1006          *      If we can bind to interfaces, do so,
1007          *      else don't.
1008          */
1009         if (cf_pair_find(cs, "interface")) {
1010                 const char *value;
1011                 CONF_PAIR *cp = cf_pair_find(cs, "interface");
1012
1013                 rad_assert(cp != NULL);
1014                 value = cf_pair_value(cp);
1015                 if (!value) {
1016                         cf_log_err(cf_sectiontoitem(cs),
1017                                    "No interface name given");
1018                         return -1;
1019                 }
1020                 sock->interface = value;
1021         }
1022
1023 #ifdef WITH_DHCP
1024         /*
1025          *      If we can do broadcasts..
1026          */
1027         if (cf_pair_find(cs, "broadcast")) {
1028 #ifndef SO_BROADCAST
1029                 cf_log_err(cf_sectiontoitem(cs),
1030                            "System does not support broadcast sockets.  Delete this line from the configuration file.");
1031                 return -1;
1032 #else
1033                 const char *value;
1034                 CONF_PAIR *cp = cf_pair_find(cs, "broadcast");
1035
1036                 if (this->type != RAD_LISTEN_DHCP) {
1037                         cf_log_err(cf_pairtoitem(cp),
1038                                    "Broadcast can only be set for DHCP listeners.  Delete this line from the configuration file.");
1039                         return -1;
1040                 }
1041
1042                 rad_assert(cp != NULL);
1043                 value = cf_pair_value(cp);
1044                 if (!value) {
1045                         cf_log_err(cf_sectiontoitem(cs),
1046                                    "No broadcast value given");
1047                         return -1;
1048                 }
1049
1050                 /*
1051                  *      Hack... whatever happened to cf_section_parse?
1052                  */
1053                 sock->broadcast = (strcmp(value, "yes") == 0);
1054 #endif
1055         }
1056 #endif
1057
1058         /*
1059          *      And bind it to the port.
1060          */
1061         if (listen_bind(this) < 0) {
1062                 char buffer[128];
1063                 cf_log_err(cf_sectiontoitem(cs),
1064                            "Error binding to port for %s port %d",
1065                            ip_ntoh(&sock->my_ipaddr, buffer, sizeof(buffer)),
1066                            sock->my_port);
1067                 return -1;
1068         }
1069
1070 #ifdef WITH_PROXY
1071         /*
1072          *      Proxy sockets don't have clients.
1073          */
1074         if (this->type == RAD_LISTEN_PROXY) return 0;
1075 #endif
1076
1077         /*
1078          *      The more specific configurations are preferred to more
1079          *      generic ones.
1080          */
1081         client_cs = NULL;
1082         parentcs = cf_top_section(cs);
1083         rcode = cf_item_parse(cs, "clients", PW_TYPE_STRING_PTR,
1084                               &section_name, NULL);
1085         if (rcode < 0) return -1; /* bad string */
1086         if (rcode == 0) {
1087                 /*
1088                  *      Explicit list given: use it.
1089                  */
1090                 client_cs = cf_section_sub_find_name2(parentcs,
1091                                                       "clients",
1092                                                       section_name);
1093                 if (!client_cs) {
1094                         client_cs = cf_section_find(section_name);
1095                 }
1096                 if (!client_cs) {
1097                         cf_log_err(cf_sectiontoitem(cs),
1098                                    "Failed to find clients %s {...}",
1099                                    section_name);
1100                         free(section_name);
1101                         return -1;
1102                 }
1103                 free(section_name);
1104         } /* else there was no "clients = " entry. */
1105
1106         if (!client_cs) {
1107                 CONF_SECTION *server_cs;
1108
1109                 server_cs = cf_section_sub_find_name2(parentcs,
1110                                                       "server",
1111                                                       this->server);
1112                 /*
1113                  *      Found a "server foo" section.  If there are clients
1114                  *      in it, use them.
1115                  */
1116                 if (server_cs &&
1117                     (cf_section_sub_find(server_cs, "client") != NULL)) {
1118                         client_cs = server_cs;
1119                 }
1120         }
1121
1122         /*
1123          *      Still nothing.  Look for global clients.
1124          */
1125         if (!client_cs) client_cs = parentcs;
1126
1127         sock->clients = clients_parse_section(client_cs);
1128         if (!sock->clients) {
1129                 cf_log_err(cf_sectiontoitem(cs),
1130                            "Failed to load clients for this listen section");
1131                 return -1;
1132         }
1133
1134 #ifdef WITH_TCP
1135         if (sock->proto == IPPROTO_TCP) {
1136                 /*
1137                  *      Re-write the listener receive function to
1138                  *      allow us to accept the socket.
1139                  */
1140                 this->recv = dual_tcp_accept;
1141         }
1142 #endif
1143
1144         return 0;
1145 }
1146
1147 /*
1148  *      Send an authentication response packet
1149  */
1150 static int auth_socket_send(rad_listen_t *listener, REQUEST *request)
1151 {
1152         rad_assert(request->listener == listener);
1153         rad_assert(listener->send == auth_socket_send);
1154
1155         if (rad_send(request->reply, request->packet,
1156                      request->client->secret) < 0) {
1157                 radlog_request(L_ERR, 0, request, "Failed sending reply: %s",
1158                                fr_strerror());
1159                 return -1;
1160         }
1161
1162         return 0;
1163 }
1164
1165
1166 #ifdef WITH_ACCOUNTING
1167 /*
1168  *      Send an accounting response packet (or not)
1169  */
1170 static int acct_socket_send(rad_listen_t *listener, REQUEST *request)
1171 {
1172         rad_assert(request->listener == listener);
1173         rad_assert(listener->send == acct_socket_send);
1174
1175         /*
1176          *      Accounting reject's are silently dropped.
1177          *
1178          *      We do it here to avoid polluting the rest of the
1179          *      code with this knowledge
1180          */
1181         if (request->reply->code == 0) return 0;
1182
1183         if (rad_send(request->reply, request->packet,
1184                      request->client->secret) < 0) {
1185                 radlog_request(L_ERR, 0, request, "Failed sending reply: %s",
1186                                fr_strerror());
1187                 return -1;
1188         }
1189
1190         return 0;
1191 }
1192 #endif
1193
1194 #ifdef WITH_PROXY
1195 /*
1196  *      Send a packet to a home server.
1197  *
1198  *      FIXME: have different code for proxy auth & acct!
1199  */
1200 static int proxy_socket_send(rad_listen_t *listener, REQUEST *request)
1201 {
1202         rad_assert(request->proxy_listener == listener);
1203         rad_assert(listener->send == proxy_socket_send);
1204
1205         if (rad_send(request->proxy, request->packet,
1206                      request->home_server->secret) < 0) {
1207                 radlog_request(L_ERR, 0, request, "Failed sending proxied request: %s",
1208                                fr_strerror());
1209                 return -1;
1210         }
1211
1212         return 0;
1213 }
1214 #endif
1215
1216 #ifdef WITH_STATS
1217 /*
1218  *      Check if an incoming request is "ok"
1219  *
1220  *      It takes packets, not requests.  It sees if the packet looks
1221  *      OK.  If so, it does a number of sanity checks on it.
1222   */
1223 static int stats_socket_recv(rad_listen_t *listener)
1224 {
1225         ssize_t         rcode;
1226         int             code, src_port;
1227         RADIUS_PACKET   *packet;
1228         RADCLIENT       *client = NULL;
1229         fr_ipaddr_t     src_ipaddr;
1230
1231         rcode = rad_recv_header(listener->fd, &src_ipaddr, &src_port, &code);
1232         if (rcode < 0) return 0;
1233
1234         FR_STATS_INC(auth, total_requests);
1235
1236         if (rcode < 20) {       /* AUTH_HDR_LEN */
1237                 FR_STATS_INC(auth, total_malformed_requests);
1238                 return 0;
1239         }
1240
1241         if ((client = client_listener_find(listener,
1242                                            &src_ipaddr, src_port)) == NULL) {
1243                 rad_recv_discard(listener->fd);
1244                 FR_STATS_INC(auth, total_invalid_requests);
1245                 return 0;
1246         }
1247
1248         FR_STATS_TYPE_INC(client->auth->total_requests);
1249
1250         /*
1251          *      We only understand Status-Server on this socket.
1252          */
1253         if (code != PW_STATUS_SERVER) {
1254                 DEBUG("Ignoring packet code %d sent to Status-Server port",
1255                       code);
1256                 rad_recv_discard(listener->fd);
1257                 FR_STATS_INC(auth, total_unknown_types);
1258                 return 0;
1259         }
1260
1261         /*
1262          *      Now that we've sanity checked everything, receive the
1263          *      packet.
1264          */
1265         packet = rad_recv(listener->fd, 1); /* require message authenticator */
1266         if (!packet) {
1267                 FR_STATS_INC(auth, total_malformed_requests);
1268                 DEBUG("%s", fr_strerror());
1269                 return 0;
1270         }
1271
1272         if (!request_receive(listener, packet, client, rad_status_server)) {
1273                 FR_STATS_INC(auth, total_packets_dropped);
1274                 rad_free(&packet);
1275                 return 0;
1276         }
1277
1278         return 1;
1279 }
1280 #endif
1281
1282
1283 /*
1284  *      Check if an incoming request is "ok"
1285  *
1286  *      It takes packets, not requests.  It sees if the packet looks
1287  *      OK.  If so, it does a number of sanity checks on it.
1288   */
1289 static int auth_socket_recv(rad_listen_t *listener)
1290 {
1291         ssize_t         rcode;
1292         int             code, src_port;
1293         RADIUS_PACKET   *packet;
1294         RAD_REQUEST_FUNP fun = NULL;
1295         RADCLIENT       *client = NULL;
1296         fr_ipaddr_t     src_ipaddr;
1297
1298         rcode = rad_recv_header(listener->fd, &src_ipaddr, &src_port, &code);
1299         if (rcode < 0) return 0;
1300
1301         FR_STATS_INC(auth, total_requests);
1302
1303         if (rcode < 20) {       /* AUTH_HDR_LEN */
1304                 FR_STATS_INC(auth, total_malformed_requests);
1305                 return 0;
1306         }
1307
1308         if ((client = client_listener_find(listener,
1309                                            &src_ipaddr, src_port)) == NULL) {
1310                 rad_recv_discard(listener->fd);
1311                 FR_STATS_INC(auth, total_invalid_requests);
1312                 return 0;
1313         }
1314
1315         FR_STATS_TYPE_INC(client->auth->total_requests);
1316
1317         /*
1318          *      Some sanity checks, based on the packet code.
1319          */
1320         switch(code) {
1321         case PW_AUTHENTICATION_REQUEST:
1322                 fun = rad_authenticate;
1323                 break;
1324
1325         case PW_STATUS_SERVER:
1326                 if (!mainconfig.status_server) {
1327                         rad_recv_discard(listener->fd);
1328                         FR_STATS_INC(auth, total_unknown_types);
1329                         DEBUG("WARNING: Ignoring Status-Server request due to security configuration");
1330                         return 0;
1331                 }
1332                 fun = rad_status_server;
1333                 break;
1334
1335         default:
1336                 rad_recv_discard(listener->fd);
1337                 FR_STATS_INC(auth,total_unknown_types);
1338
1339                 DEBUG("Invalid packet code %d sent to authentication port from client %s port %d : IGNORED",
1340                       code, client->shortname, src_port);
1341                 return 0;
1342                 break;
1343         } /* switch over packet types */
1344
1345         /*
1346          *      Now that we've sanity checked everything, receive the
1347          *      packet.
1348          */
1349         packet = rad_recv(listener->fd, client->message_authenticator);
1350         if (!packet) {
1351                 FR_STATS_INC(auth, total_malformed_requests);
1352                 DEBUG("%s", fr_strerror());
1353                 return 0;
1354         }
1355
1356         if (!request_receive(listener, packet, client, fun)) {
1357                 FR_STATS_INC(auth, total_packets_dropped);
1358                 rad_free(&packet);
1359                 return 0;
1360         }
1361
1362         return 1;
1363 }
1364
1365
1366 #ifdef WITH_ACCOUNTING
1367 /*
1368  *      Receive packets from an accounting socket
1369  */
1370 static int acct_socket_recv(rad_listen_t *listener)
1371 {
1372         ssize_t         rcode;
1373         int             code, src_port;
1374         RADIUS_PACKET   *packet;
1375         RAD_REQUEST_FUNP fun = NULL;
1376         RADCLIENT       *client = NULL;
1377         fr_ipaddr_t     src_ipaddr;
1378
1379         rcode = rad_recv_header(listener->fd, &src_ipaddr, &src_port, &code);
1380         if (rcode < 0) return 0;
1381
1382         FR_STATS_INC(acct, total_requests);
1383
1384         if (rcode < 20) {       /* AUTH_HDR_LEN */
1385                 FR_STATS_INC(acct, total_malformed_requests);
1386                 return 0;
1387         }
1388
1389         if ((client = client_listener_find(listener,
1390                                            &src_ipaddr, src_port)) == NULL) {
1391                 rad_recv_discard(listener->fd);
1392                 FR_STATS_INC(acct, total_invalid_requests);
1393                 return 0;
1394         }
1395
1396         FR_STATS_TYPE_INC(client->acct->total_requests);
1397
1398         /*
1399          *      Some sanity checks, based on the packet code.
1400          */
1401         switch(code) {
1402         case PW_ACCOUNTING_REQUEST:
1403                 fun = rad_accounting;
1404                 break;
1405
1406         case PW_STATUS_SERVER:
1407                 if (!mainconfig.status_server) {
1408                         rad_recv_discard(listener->fd);
1409                         FR_STATS_INC(acct, total_unknown_types);
1410
1411                         DEBUG("WARNING: Ignoring Status-Server request due to security configuration");
1412                         return 0;
1413                 }
1414                 fun = rad_status_server;
1415                 break;
1416
1417         default:
1418                 rad_recv_discard(listener->fd);
1419                 FR_STATS_INC(acct, total_unknown_types);
1420
1421                 DEBUG("Invalid packet code %d sent to a accounting port from client %s port %d : IGNORED",
1422                       code, client->shortname, src_port);
1423                 return 0;
1424         } /* switch over packet types */
1425
1426         /*
1427          *      Now that we've sanity checked everything, receive the
1428          *      packet.
1429          */
1430         packet = rad_recv(listener->fd, 0);
1431         if (!packet) {
1432                 FR_STATS_INC(acct, total_malformed_requests);
1433                 radlog(L_ERR, "%s", fr_strerror());
1434                 return 0;
1435         }
1436
1437         /*
1438          *      There can be no duplicate accounting packets.
1439          */
1440         if (!request_receive(listener, packet, client, fun)) {
1441                 FR_STATS_INC(acct, total_packets_dropped);
1442                 rad_free(&packet);
1443                 return 0;
1444         }
1445
1446         return 1;
1447 }
1448 #endif
1449
1450
1451 #ifdef WITH_COA
1452 static int do_proxy(REQUEST *request)
1453 {
1454         VALUE_PAIR *vp;
1455
1456         if (request->in_proxy_hash ||
1457             (request->proxy_reply && (request->proxy_reply->code != 0))) {
1458                 return 0;
1459         }
1460
1461         vp = pairfind(request->config_items, PW_HOME_SERVER_POOL, 0);
1462         if (!vp) return 0;
1463
1464         if (!home_pool_byname(vp->vp_strvalue, HOME_TYPE_COA)) {
1465                 RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
1466                         vp->vp_strvalue);
1467                 return 0;
1468         }
1469
1470         return 1;
1471 }
1472
1473 /*
1474  *      Receive a CoA packet.
1475  */
1476 static int rad_coa_recv(REQUEST *request)
1477 {
1478         int rcode = RLM_MODULE_OK;
1479         int ack, nak;
1480         VALUE_PAIR *vp;
1481
1482         /*
1483          *      Get the correct response
1484          */
1485         switch (request->packet->code) {
1486         case PW_COA_REQUEST:
1487                 ack = PW_COA_ACK;
1488                 nak = PW_COA_NAK;
1489                 break;
1490
1491         case PW_DISCONNECT_REQUEST:
1492                 ack = PW_DISCONNECT_ACK;
1493                 nak = PW_DISCONNECT_NAK;
1494                 break;
1495
1496         default:                /* shouldn't happen */
1497                 return RLM_MODULE_FAIL;
1498         }
1499
1500 #ifdef WITH_PROXY
1501 #define WAS_PROXIED (request->proxy)
1502 #else
1503 #define WAS_PROXIED (0)
1504 #endif
1505
1506         if (!WAS_PROXIED) {
1507                 /*
1508                  *      RFC 5176 Section 3.3.  If we have a CoA-Request
1509                  *      with Service-Type = Authorize-Only, it MUST
1510                  *      have a State attribute in it.
1511                  */
1512                 vp = pairfind(request->packet->vps, PW_SERVICE_TYPE, 0);
1513                 if (request->packet->code == PW_COA_REQUEST) {
1514                         if (vp && (vp->vp_integer == 17)) {
1515                                 vp = pairfind(request->packet->vps, PW_STATE, 0);
1516                                 if (!vp || (vp->length == 0)) {
1517                                         RDEBUG("ERROR: CoA-Request with Service-Type = Authorize-Only MUST contain a State attribute");
1518                                         request->reply->code = PW_COA_NAK;
1519                                         return RLM_MODULE_FAIL;
1520                                 }
1521                         }
1522                 } else if (vp) {
1523                         /*
1524                          *      RFC 5176, Section 3.2.
1525                          */
1526                         RDEBUG("ERROR: Disconnect-Request MUST NOT contain a Service-Type attribute");
1527                         request->reply->code = PW_DISCONNECT_NAK;
1528                         return RLM_MODULE_FAIL;
1529                 }
1530
1531                 rcode = module_recv_coa(0, request);
1532                 switch (rcode) {
1533                 case RLM_MODULE_FAIL:
1534                 case RLM_MODULE_INVALID:
1535                 case RLM_MODULE_REJECT:
1536                 case RLM_MODULE_USERLOCK:
1537                 default:
1538                         request->reply->code = nak;
1539                         break;
1540
1541                 case RLM_MODULE_HANDLED:
1542                         return rcode;
1543
1544                 case RLM_MODULE_NOOP:
1545                 case RLM_MODULE_NOTFOUND:
1546                 case RLM_MODULE_OK:
1547                 case RLM_MODULE_UPDATED:
1548                         if (do_proxy(request)) return RLM_MODULE_OK;
1549                         request->reply->code = ack;
1550                         break;
1551                 }
1552         } else if (request->proxy_reply) {
1553                 /*
1554                  *      Start the reply code with the proxy reply
1555                  *      code.
1556                  */
1557                 request->reply->code = request->proxy_reply->code;
1558         }
1559
1560         /*
1561          *      Copy State from the request to the reply.
1562          *      See RFC 5176 Section 3.3.
1563          */
1564         vp = paircopy2(request->packet->vps, PW_STATE, 0);
1565         if (vp) pairadd(&request->reply->vps, vp);
1566
1567         /*
1568          *      We may want to over-ride the reply.
1569          */
1570         if (request->reply->code) {
1571                 rcode = module_send_coa(0, request);
1572                 switch (rcode) {
1573                         /*
1574                          *      We need to send CoA-NAK back if Service-Type
1575                          *      is Authorize-Only.  Rely on the user's policy
1576                          *      to do that.  We're not a real NAS, so this
1577                          *      restriction doesn't (ahem) apply to us.
1578                          */
1579                 case RLM_MODULE_FAIL:
1580                 case RLM_MODULE_INVALID:
1581                 case RLM_MODULE_REJECT:
1582                 case RLM_MODULE_USERLOCK:
1583                 default:
1584                         /*
1585                          *      Over-ride an ACK with a NAK
1586                          */
1587                         request->reply->code = nak;
1588                         break;
1589
1590                 case RLM_MODULE_HANDLED:
1591                         return rcode;
1592
1593                 case RLM_MODULE_NOOP:
1594                 case RLM_MODULE_NOTFOUND:
1595                 case RLM_MODULE_OK:
1596                 case RLM_MODULE_UPDATED:
1597                         /*
1598                          *      Do NOT over-ride a previously set value.
1599                          *      Otherwise an "ok" here will re-write a
1600                          *      NAK to an ACK.
1601                          */
1602                         if (request->reply->code == 0) {
1603                                 request->reply->code = ack;
1604                         }
1605                         break;
1606                 }
1607         }
1608
1609         return RLM_MODULE_OK;
1610 }
1611
1612
1613 /*
1614  *      Check if an incoming request is "ok"
1615  *
1616  *      It takes packets, not requests.  It sees if the packet looks
1617  *      OK.  If so, it does a number of sanity checks on it.
1618   */
1619 static int coa_socket_recv(rad_listen_t *listener)
1620 {
1621         ssize_t         rcode;
1622         int             code, src_port;
1623         RADIUS_PACKET   *packet;
1624         RAD_REQUEST_FUNP fun = NULL;
1625         RADCLIENT       *client = NULL;
1626         fr_ipaddr_t     src_ipaddr;
1627
1628         rcode = rad_recv_header(listener->fd, &src_ipaddr, &src_port, &code);
1629         if (rcode < 0) return 0;
1630
1631         if (rcode < 20) {       /* AUTH_HDR_LEN */
1632                 FR_STATS_INC(coa, total_requests);
1633                 FR_STATS_INC(coa, total_malformed_requests);
1634                 return 0;
1635         }
1636
1637         if ((client = client_listener_find(listener,
1638                                            &src_ipaddr, src_port)) == NULL) {
1639                 rad_recv_discard(listener->fd);
1640                 FR_STATS_INC(coa, total_requests);
1641                 FR_STATS_INC(coa, total_invalid_requests);
1642                 return 0;
1643         }
1644
1645         /*
1646          *      Some sanity checks, based on the packet code.
1647          */
1648         switch(code) {
1649         case PW_COA_REQUEST:
1650                 FR_STATS_INC(coa, total_requests);
1651                 fun = rad_coa_recv;
1652                 break;
1653
1654         case PW_DISCONNECT_REQUEST:
1655                 FR_STATS_INC(dsc, total_requests);
1656                 fun = rad_coa_recv;
1657                 break;
1658
1659         default:
1660                 rad_recv_discard(listener->fd);
1661                 FR_STATS_INC(coa, total_unknown_types);
1662                 DEBUG("Invalid packet code %d sent to coa port from client %s port %d : IGNORED",
1663                       code, client->shortname, src_port);
1664                 return 0;
1665         } /* switch over packet types */
1666
1667         /*
1668          *      Now that we've sanity checked everything, receive the
1669          *      packet.
1670          */
1671         packet = rad_recv(listener->fd, client->message_authenticator);
1672         if (!packet) {
1673                 FR_STATS_INC(coa, total_malformed_requests);
1674                 DEBUG("%s", fr_strerror());
1675                 return 0;
1676         }
1677
1678         if (!request_receive(listener, packet, client, fun)) {
1679                 FR_STATS_INC(coa, total_packets_dropped);
1680                 rad_free(&packet);
1681                 return 0;
1682         }
1683
1684         return 1;
1685 }
1686 #endif
1687
1688 #ifdef WITH_PROXY
1689 /*
1690  *      Recieve packets from a proxy socket.
1691  */
1692 static int proxy_socket_recv(rad_listen_t *listener)
1693 {
1694         RADIUS_PACKET   *packet;
1695         char            buffer[128];
1696
1697         packet = rad_recv(listener->fd, 0);
1698         if (!packet) {
1699                 radlog(L_ERR, "%s", fr_strerror());
1700                 return 0;
1701         }
1702
1703         /*
1704          *      FIXME: Client MIB updates?
1705          */
1706         switch(packet->code) {
1707         case PW_AUTHENTICATION_ACK:
1708         case PW_ACCESS_CHALLENGE:
1709         case PW_AUTHENTICATION_REJECT:
1710                 break;
1711
1712 #ifdef WITH_ACCOUNTING
1713         case PW_ACCOUNTING_RESPONSE:
1714                 break;
1715 #endif
1716
1717 #ifdef WITH_COA
1718         case PW_DISCONNECT_ACK:
1719         case PW_DISCONNECT_NAK:
1720         case PW_COA_ACK:
1721         case PW_COA_NAK:
1722                 break;
1723 #endif
1724
1725         default:
1726                 /*
1727                  *      FIXME: Update MIB for packet types?
1728                  */
1729                 radlog(L_ERR, "Invalid packet code %d sent to a proxy port "
1730                        "from home server %s port %d - ID %d : IGNORED",
1731                        packet->code,
1732                        ip_ntoh(&packet->src_ipaddr, buffer, sizeof(buffer)),
1733                        packet->src_port, packet->id);
1734                 rad_free(&packet);
1735                 return 0;
1736         }
1737
1738         if (!request_proxy_reply(packet)) {
1739                 rad_free(&packet);
1740                 return 0;
1741         }
1742
1743         return 1;
1744 }
1745
1746 #ifdef WITH_TCP
1747 /*
1748  *      Recieve packets from a proxy socket.
1749  */
1750 static int proxy_socket_tcp_recv(rad_listen_t *listener)
1751 {
1752         RADIUS_PACKET   *packet;
1753         listen_socket_t *sock = listener->data;
1754         char            buffer[128];
1755
1756         packet = fr_tcp_recv(listener->fd, 0);
1757         if (!packet) {
1758                 listener->status = RAD_LISTEN_STATUS_REMOVE_FD;
1759                 event_new_fd(listener);
1760                 return 0;
1761         }
1762
1763         /*
1764          *      FIXME: Client MIB updates?
1765          */
1766         switch(packet->code) {
1767         case PW_AUTHENTICATION_ACK:
1768         case PW_ACCESS_CHALLENGE:
1769         case PW_AUTHENTICATION_REJECT:
1770                 break;
1771
1772 #ifdef WITH_ACCOUNTING
1773         case PW_ACCOUNTING_RESPONSE:
1774                 break;
1775 #endif
1776
1777         default:
1778                 /*
1779                  *      FIXME: Update MIB for packet types?
1780                  */
1781                 radlog(L_ERR, "Invalid packet code %d sent to a proxy port "
1782                        "from home server %s port %d - ID %d : IGNORED",
1783                        packet->code,
1784                        ip_ntoh(&packet->src_ipaddr, buffer, sizeof(buffer)),
1785                        packet->src_port, packet->id);
1786                 rad_free(&packet);
1787                 return 0;
1788         }
1789
1790         packet->src_ipaddr = sock->other_ipaddr;
1791         packet->src_port = sock->other_port;
1792         packet->dst_ipaddr = sock->my_ipaddr;
1793         packet->dst_port = sock->my_port;
1794
1795         /*
1796          *      FIXME: Have it return an indication of packets that
1797          *      are OK to ignore (dups, too late), versus ones that
1798          *      aren't OK to ignore (unknown response, spoofed, etc.)
1799          *
1800          *      Close the socket on bad packets...
1801          */
1802         if (!request_proxy_reply(packet)) {
1803                 rad_free(&packet);
1804                 return 0;
1805         }
1806
1807         sock->opened = sock->last_packet = time(NULL);
1808
1809         return 1;
1810 }
1811 #endif
1812 #endif
1813
1814
1815 static int client_socket_encode(UNUSED rad_listen_t *listener, REQUEST *request)
1816 {
1817         if (!request->reply->code) return 0;
1818
1819         if (rad_encode(request->reply, request->packet,
1820                        request->client->secret) < 0) {
1821                 radlog_request(L_ERR, 0, request, "Failed encoding packet: %s",
1822                                fr_strerror());
1823                 return -1;
1824         }
1825
1826         if (rad_sign(request->reply, request->packet,
1827                      request->client->secret) < 0) {
1828                 radlog_request(L_ERR, 0, request, "Failed signing packet: %s",
1829                                fr_strerror());
1830                 return -1;
1831         }
1832
1833         return 0;
1834 }
1835
1836
1837 static int client_socket_decode(UNUSED rad_listen_t *listener, REQUEST *request)
1838 {
1839         if (rad_verify(request->packet, NULL,
1840                        request->client->secret) < 0) {
1841                 return -1;
1842         }
1843
1844         return rad_decode(request->packet, NULL,
1845                           request->client->secret);
1846 }
1847
1848 #ifdef WITH_PROXY
1849 static int proxy_socket_encode(UNUSED rad_listen_t *listener, REQUEST *request)
1850 {
1851         if (rad_encode(request->proxy, NULL, request->home_server->secret) < 0) {
1852                 radlog_request(L_ERR, 0, request, "Failed encoding proxied packet: %s",
1853                                fr_strerror());
1854                 return -1;
1855         }
1856
1857         if (rad_sign(request->proxy, NULL, request->home_server->secret) < 0) {
1858                 radlog_request(L_ERR, 0, request, "Failed signing proxied packet: %s",
1859                                fr_strerror());
1860                 return -1;
1861         }
1862
1863         return 0;
1864 }
1865
1866
1867 static int proxy_socket_decode(UNUSED rad_listen_t *listener, REQUEST *request)
1868 {
1869         /*
1870          *      rad_verify is run in event.c, received_proxy_response()
1871          */
1872
1873         return rad_decode(request->proxy_reply, request->proxy,
1874                            request->home_server->secret);
1875 }
1876 #endif
1877
1878 #include "dhcpd.c"
1879
1880 #include "command.c"
1881
1882 static const rad_listen_master_t master_listen[RAD_LISTEN_MAX] = {
1883 #ifdef WITH_STATS
1884         { common_socket_parse, NULL,
1885           stats_socket_recv, auth_socket_send,
1886           socket_print, client_socket_encode, client_socket_decode },
1887 #else
1888         /*
1889          *      This always gets defined.
1890          */
1891         { NULL, NULL, NULL, NULL, NULL, NULL, NULL},    /* RAD_LISTEN_NONE */
1892 #endif
1893
1894 #ifdef WITH_PROXY
1895         /* proxying */
1896         { common_socket_parse, NULL,
1897           proxy_socket_recv, proxy_socket_send,
1898           socket_print, proxy_socket_encode, proxy_socket_decode },
1899 #endif
1900
1901         /* authentication */
1902         { common_socket_parse, NULL,
1903           auth_socket_recv, auth_socket_send,
1904           socket_print, client_socket_encode, client_socket_decode },
1905
1906 #ifdef WITH_ACCOUNTING
1907         /* accounting */
1908         { common_socket_parse, NULL,
1909           acct_socket_recv, acct_socket_send,
1910           socket_print, client_socket_encode, client_socket_decode},
1911 #endif
1912
1913 #ifdef WITH_DETAIL
1914         /* detail */
1915         { detail_parse, detail_free,
1916           detail_recv, detail_send,
1917           detail_print, detail_encode, detail_decode },
1918 #endif
1919
1920 #ifdef WITH_VMPS
1921         /* vlan query protocol */
1922         { common_socket_parse, NULL,
1923           vqp_socket_recv, vqp_socket_send,
1924           socket_print, vqp_socket_encode, vqp_socket_decode },
1925 #endif
1926
1927 #ifdef WITH_DHCP
1928         /* dhcp query protocol */
1929         { dhcp_socket_parse, NULL,
1930           dhcp_socket_recv, dhcp_socket_send,
1931           socket_print, dhcp_socket_encode, dhcp_socket_decode },
1932 #endif
1933
1934 #ifdef WITH_COMMAND_SOCKET
1935         /* TCP command socket */
1936         { command_socket_parse, command_socket_free,
1937           command_domain_accept, command_domain_send,
1938           command_socket_print, command_socket_encode, command_socket_decode },
1939 #endif
1940
1941 #ifdef WITH_COA
1942         /* Change of Authorization */
1943         { common_socket_parse, NULL,
1944           coa_socket_recv, auth_socket_send, /* CoA packets are same as auth */
1945           socket_print, client_socket_encode, client_socket_decode },
1946 #endif
1947
1948 };
1949
1950
1951
1952 /*
1953  *      Binds a listener to a socket.
1954  */
1955 static int listen_bind(rad_listen_t *this)
1956 {
1957         int rcode;
1958         struct sockaddr_storage salocal;
1959         socklen_t       salen;
1960         listen_socket_t *sock = this->data;
1961 #ifndef WITH_TCP
1962 #define proto_for_port "udp"
1963 #define sock_type SOCK_DGRAM
1964 #else
1965         const char *proto_for_port = "udp";
1966         int sock_type = SOCK_DGRAM;
1967
1968         if (sock->proto == IPPROTO_TCP) {
1969 #ifdef WITH_VMPS
1970                 if (this->type == RAD_LISTEN_VQP) {
1971                         radlog(L_ERR, "VQP does not support TCP transport");
1972                         return -1;
1973                 }
1974 #endif
1975
1976                 proto_for_port = "tcp";
1977                 sock_type = SOCK_STREAM;
1978         }
1979 #endif
1980
1981         /*
1982          *      If the port is zero, then it means the appropriate
1983          *      thing from /etc/services.
1984          */
1985         if (sock->my_port == 0) {
1986                 struct servent  *svp;
1987
1988                 switch (this->type) {
1989                 case RAD_LISTEN_AUTH:
1990                         svp = getservbyname ("radius", proto_for_port);
1991                         if (svp != NULL) {
1992                                 sock->my_port = ntohs(svp->s_port);
1993                         } else {
1994                                 sock->my_port = PW_AUTH_UDP_PORT;
1995                         }
1996                         break;
1997
1998 #ifdef WITH_ACCOUNTING
1999                 case RAD_LISTEN_ACCT:
2000                         svp = getservbyname ("radacct", proto_for_port);
2001                         if (svp != NULL) {
2002                                 sock->my_port = ntohs(svp->s_port);
2003                         } else {
2004                                 sock->my_port = PW_ACCT_UDP_PORT;
2005                         }
2006                         break;
2007 #endif
2008
2009 #ifdef WITH_PROXY
2010                 case RAD_LISTEN_PROXY:
2011                         /* leave it at zero */
2012                         break;
2013 #endif
2014
2015 #ifdef WITH_VMPS
2016                 case RAD_LISTEN_VQP:
2017                         sock->my_port = 1589;
2018                         break;
2019 #endif
2020
2021 #ifdef WITH_COA
2022                 case RAD_LISTEN_COA:
2023                         svp = getservbyname ("radius-dynauth", "udp");
2024                         if (svp != NULL) {
2025                                 sock->my_port = ntohs(svp->s_port);
2026                         } else {
2027                                 sock->my_port = PW_COA_UDP_PORT;
2028                         }
2029                         break;
2030 #endif
2031
2032                 default:
2033                         DEBUG("WARNING: Internal sanity check failed in binding to socket.  Ignoring problem.");
2034                         return -1;
2035                 }
2036         }
2037
2038         /*
2039          *      Copy fr_socket() here, as we may need to bind to a device.
2040          */
2041         this->fd = socket(sock->my_ipaddr.af, sock_type, 0);
2042         if (this->fd < 0) {
2043                 char buffer[256];
2044
2045                 this->print(this, buffer, sizeof(buffer));
2046
2047                 radlog(L_ERR, "Failed opening %s: %s", buffer, strerror(errno));
2048                 return -1;
2049         }
2050
2051         /*
2052          *      Bind to a device BEFORE touching IP addresses.
2053          */
2054         if (sock->interface) {
2055 #ifdef SO_BINDTODEVICE
2056                 struct ifreq ifreq;
2057                 strcpy(ifreq.ifr_name, sock->interface);
2058
2059                 fr_suid_up();
2060                 rcode = setsockopt(this->fd, SOL_SOCKET, SO_BINDTODEVICE,
2061                                    (char *)&ifreq, sizeof(ifreq));
2062                 fr_suid_down();
2063                 if (rcode < 0) {
2064                         close(this->fd);
2065                         radlog(L_ERR, "Failed binding to interface %s: %s",
2066                                sock->interface, strerror(errno));
2067                         return -1;
2068                 } /* else it worked. */
2069 #else
2070 #ifdef HAVE_STRUCT_SOCKADDR_IN6
2071 #ifdef HAVE_NET_IF_H
2072                 /*
2073                  *      Odds are that any system supporting "bind to
2074                  *      device" also supports IPv6, so this next bit
2075                  *      isn't necessary.  But it's here for
2076                  *      completeness.
2077                  *
2078                  *      If we're doing IPv6, and the scope hasn't yet
2079                  *      been defined, set the scope to the scope of
2080                  *      the interface.
2081                  */
2082                 if (sock->my_ipaddr.af == AF_INET6) {
2083                         if (sock->my_ipaddr.scope == 0) {
2084                                 sock->my_ipaddr.scope = if_nametoindex(sock->interface);
2085                                 if (sock->my_ipaddr.scope == 0) {
2086                                         close(this->fd);
2087                                         radlog(L_ERR, "Failed finding interface %s: %s",
2088                                                sock->interface, strerror(errno));
2089                                         return -1;
2090                                 }
2091                         } /* else scope was defined: we're OK. */
2092                 } else
2093 #endif
2094 #endif
2095                                 /*
2096                                  *      IPv4: no link local addresses,
2097                                  *      and no bind to device.
2098                                  */
2099                 {
2100                         close(this->fd);
2101                         radlog(L_ERR, "Failed binding to interface %s: \"bind to device\" is unsupported", sock->interface);
2102                         return -1;
2103                 }
2104 #endif
2105         }
2106
2107 #ifdef WITH_TCP
2108         if (sock->proto == IPPROTO_TCP) {
2109                 int on = 1;
2110
2111                 if (setsockopt(this->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
2112                         close(this->fd);
2113                         radlog(L_ERR, "Failed to reuse address: %s", strerror(errno));
2114                         return -1;
2115                 }
2116         }
2117 #endif
2118
2119 #if defined(WITH_TCP) && defined(WITH_UDPFROMTO)
2120         else                    /* UDP sockets get UDPfromto */
2121 #endif
2122
2123 #ifdef WITH_UDPFROMTO
2124         /*
2125          *      Initialize udpfromto for all sockets.
2126          */
2127         if (udpfromto_init(this->fd) != 0) {
2128                 radlog(L_ERR, "Failed initializing udpfromto: %s",
2129                        strerror(errno));
2130                 close(this->fd);
2131                 return -1;
2132         }
2133 #endif
2134
2135         /*
2136          *      Set up sockaddr stuff.
2137          */
2138         if (!fr_ipaddr2sockaddr(&sock->my_ipaddr, sock->my_port, &salocal, &salen)) {
2139                 close(this->fd);
2140                 return -1;
2141         }
2142
2143 #ifdef HAVE_STRUCT_SOCKADDR_IN6
2144         if (sock->my_ipaddr.af == AF_INET6) {
2145                 /*
2146                  *      Listening on '::' does NOT get you IPv4 to
2147                  *      IPv6 mapping.  You've got to listen on an IPv4
2148                  *      address, too.  This makes the rest of the server
2149                  *      design a little simpler.
2150                  */
2151 #ifdef IPV6_V6ONLY
2152
2153                 if (IN6_IS_ADDR_UNSPECIFIED(&sock->my_ipaddr.ipaddr.ip6addr)) {
2154                         int on = 1;
2155
2156                         setsockopt(this->fd, IPPROTO_IPV6, IPV6_V6ONLY,
2157                                    (char *)&on, sizeof(on));
2158                 }
2159 #endif /* IPV6_V6ONLY */
2160         }
2161 #endif /* HAVE_STRUCT_SOCKADDR_IN6 */
2162
2163         if (sock->my_ipaddr.af == AF_INET) {
2164                 UNUSED int flag;
2165
2166 #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
2167                 /*
2168                  *      Disable PMTU discovery.  On Linux, this
2169                  *      also makes sure that the "don't fragment"
2170                  *      flag is zero.
2171                  */
2172                 flag = IP_PMTUDISC_DONT;
2173                 setsockopt(this->fd, IPPROTO_IP, IP_MTU_DISCOVER,
2174                            &flag, sizeof(flag));
2175 #endif
2176
2177 #if defined(IP_DONTFRAG)
2178                 /*
2179                  *      Ensure that the "don't fragment" flag is zero.
2180                  */
2181                 flag = 0;
2182                 setsockopt(this->fd, IPPROTO_IP, IP_DONTFRAG,
2183                            &flag, sizeof(flag));
2184 #endif
2185         }
2186
2187 #ifdef WITH_DHCP
2188 #ifdef SO_BROADCAST
2189         if (sock->broadcast) {
2190                 int on = 1;
2191
2192                 if (setsockopt(this->fd, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) < 0) {
2193                         radlog(L_ERR, "Can't set broadcast option: %s\n",
2194                                strerror(errno));
2195                         return -1;
2196                 }
2197         }
2198 #endif
2199 #endif
2200
2201         /*
2202          *      May be binding to priviledged ports.
2203          */
2204         if (sock->my_port != 0) {
2205 #ifdef SO_REUSEADDR
2206                 int on = 1;
2207
2208                 if (setsockopt(this->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
2209                         radlog(L_ERR, "Can't set re-use address option: %s\n",
2210                                strerror(errno));
2211                         return -1;
2212                 }
2213 #endif
2214
2215                 fr_suid_up();
2216                 rcode = bind(this->fd, (struct sockaddr *) &salocal, salen);
2217                 fr_suid_down();
2218                 if (rcode < 0) {
2219                         char buffer[256];
2220                         close(this->fd);
2221
2222                         this->print(this, buffer, sizeof(buffer));
2223                         radlog(L_ERR, "Failed binding to %s: %s\n",
2224                                buffer, strerror(errno));
2225                         return -1;
2226                 }
2227
2228                 /*
2229                  *      FreeBSD jail issues.  We bind to 0.0.0.0, but the
2230                  *      kernel instead binds us to a 1.2.3.4.  If this
2231                  *      happens, notice, and remember our real IP.
2232                  */
2233                 {
2234                         struct sockaddr_storage src;
2235                         socklen_t               sizeof_src = sizeof(src);
2236
2237                         memset(&src, 0, sizeof_src);
2238                         if (getsockname(this->fd, (struct sockaddr *) &src,
2239                                         &sizeof_src) < 0) {
2240                                 radlog(L_ERR, "Failed getting socket name: %s",
2241                                        strerror(errno));
2242                                 return -1;
2243                         }
2244
2245                         if (!fr_sockaddr2ipaddr(&src, sizeof_src,
2246                                                 &sock->my_ipaddr, &sock->my_port)) {
2247                                 radlog(L_ERR, "Socket has unsupported address family");
2248                                 return -1;
2249                         }
2250                 }
2251         }
2252
2253 #ifdef WITH_TCP
2254         if (sock->proto == IPPROTO_TCP) {
2255                 if (listen(this->fd, 8) < 0) {
2256                         close(this->fd);
2257                         radlog(L_ERR, "Failed in listen(): %s", strerror(errno));
2258                         return -1;
2259                 }
2260         } else
2261 #endif
2262
2263           if (fr_nonblock(this->fd) < 0) {
2264                   close(this->fd);
2265                   radlog(L_ERR, "Failed setting non-blocking on socket: %s",
2266                          strerror(errno));
2267                   return -1;
2268           }
2269
2270         /*
2271          *      Mostly for proxy sockets.
2272          */
2273         sock->other_ipaddr.af = sock->my_ipaddr.af;
2274
2275 /*
2276  *      Don't screw up other people.
2277  */
2278 #undef proto_for_port
2279 #undef sock_type
2280
2281         return 0;
2282 }
2283
2284
2285 /*
2286  *      Allocate & initialize a new listener.
2287  */
2288 static rad_listen_t *listen_alloc(RAD_LISTEN_TYPE type)
2289 {
2290         rad_listen_t *this;
2291
2292         this = rad_malloc(sizeof(*this));
2293         memset(this, 0, sizeof(*this));
2294
2295         this->type = type;
2296         this->recv = master_listen[this->type].recv;
2297         this->send = master_listen[this->type].send;
2298         this->print = master_listen[this->type].print;
2299         this->encode = master_listen[this->type].encode;
2300         this->decode = master_listen[this->type].decode;
2301
2302         switch (type) {
2303 #ifdef WITH_STATS
2304         case RAD_LISTEN_NONE:
2305 #endif
2306         case RAD_LISTEN_AUTH:
2307 #ifdef WITH_ACCOUNTING
2308         case RAD_LISTEN_ACCT:
2309 #endif
2310 #ifdef WITH_PROXY
2311         case RAD_LISTEN_PROXY:
2312 #endif
2313 #ifdef WITH_VMPS
2314         case RAD_LISTEN_VQP:
2315 #endif
2316 #ifdef WITH_COA
2317         case RAD_LISTEN_COA:
2318 #endif
2319                 this->data = rad_malloc(sizeof(listen_socket_t));
2320                 memset(this->data, 0, sizeof(listen_socket_t));
2321                 break;
2322
2323 #ifdef WITH_DHCP
2324         case RAD_LISTEN_DHCP:
2325                 this->data = rad_malloc(sizeof(dhcp_socket_t));
2326                 memset(this->data, 0, sizeof(dhcp_socket_t));
2327                 break;
2328 #endif
2329
2330 #ifdef WITH_DETAIL
2331         case RAD_LISTEN_DETAIL:
2332                 this->data = NULL;
2333                 break;
2334 #endif
2335
2336 #ifdef WITH_COMMAND_SOCKET
2337         case RAD_LISTEN_COMMAND:
2338                 this->data = rad_malloc(sizeof(fr_command_socket_t));
2339                 memset(this->data, 0, sizeof(fr_command_socket_t));
2340                 break;
2341 #endif
2342
2343         default:
2344                 rad_assert("Unsupported option!" == NULL);
2345                 break;
2346         }
2347
2348         return this;
2349 }
2350
2351 #ifdef WITH_PROXY
2352 /*
2353  *      Externally visible function for creating a new proxy LISTENER.
2354  *
2355  *      Not thread-safe, but all calls to it are protected by the
2356  *      proxy mutex in event.c
2357  */
2358 int proxy_new_listener(home_server *home, int src_port)
2359 {
2360         rad_listen_t *this;
2361         listen_socket_t *sock;
2362 #ifndef NDEBUG
2363         char buffer[256];
2364 #endif
2365
2366         if (!home) return 0;
2367
2368         if ((home->max_connections > 0) &&
2369             (home->num_connections >= home->max_connections)) {
2370                 DEBUG("WARNING: Home server has too many open connections (%d)",
2371                       home->max_connections);
2372                 return 0;
2373         }
2374
2375         this = listen_alloc(RAD_LISTEN_PROXY);
2376
2377         sock = this->data;
2378         sock->other_ipaddr = home->ipaddr;
2379         sock->other_port = home->port;
2380         sock->home = home;
2381
2382         sock->my_ipaddr = home->src_ipaddr;
2383         sock->my_port = src_port;
2384         sock->proto = home->proto;
2385
2386         if (debug_flag >= 2) {
2387                 this->print(this, buffer, sizeof(buffer));
2388                 DEBUG("Opening new %s", buffer);
2389         }
2390
2391 #ifdef WITH_TCP
2392         sock->opened = sock->last_packet = time(NULL);
2393
2394         if (home->proto == IPPROTO_TCP) {
2395                 this->recv = proxy_socket_tcp_recv;
2396
2397                 /*
2398                  *      FIXME: connect() is blocking!
2399                  *      We do this with the proxy mutex locked, which may
2400                  *      cause large delays!
2401                  *
2402                  *      http://www.developerweb.net/forum/showthread.php?p=13486
2403                  */
2404                 this->fd = fr_tcp_client_socket(&home->src_ipaddr,
2405                                                 &home->ipaddr, home->port);
2406 #ifdef WITH_TLS
2407                 if (home->tls) {
2408                         DEBUG("Trying SSL to port %d\n", home->port);
2409                         sock->ssn = tls_new_client_session(home->tls, this->fd);
2410                         if (!sock->ssn) {
2411                                 listen_free(&this);
2412                                 return 0;
2413                         }
2414
2415                         this->recv = proxy_tls_recv;
2416                         this->send = proxy_tls_send;
2417                 }
2418 #endif
2419         } else
2420 #endif
2421                 this->fd = fr_socket(&home->src_ipaddr, src_port);
2422
2423         if (this->fd < 0) {
2424                 this->print(this, buffer,sizeof(buffer));
2425                 DEBUG("Failed opening client socket ::%s:: : %s",
2426                       buffer, fr_strerror());
2427                 listen_free(&this);
2428                 return 0;
2429         }
2430
2431         /*
2432          *      Figure out which port we were bound to.
2433          */
2434         if (sock->my_port == 0) {
2435                 struct sockaddr_storage src;
2436                 socklen_t               sizeof_src = sizeof(src);
2437
2438                 memset(&src, 0, sizeof_src);
2439                 if (getsockname(this->fd, (struct sockaddr *) &src,
2440                                 &sizeof_src) < 0) {
2441                         radlog(L_ERR, "Failed getting socket name: %s",
2442                                strerror(errno));
2443                         listen_free(&this);
2444                         return 0;
2445                 }
2446
2447                 if (!fr_sockaddr2ipaddr(&src, sizeof_src,
2448                                         &sock->my_ipaddr, &sock->my_port)) {
2449                         radlog(L_ERR, "Socket has unsupported address family");
2450                         listen_free(&this);
2451                         return 0;
2452                 }
2453         }
2454
2455         /*
2456          *      Tell the event loop that we have a new FD
2457          */
2458         if (!event_new_fd(this)) {
2459                 listen_free(&this);
2460                 return 0;
2461         }
2462
2463         return 1;
2464 }
2465 #endif
2466
2467
2468 static const FR_NAME_NUMBER listen_compare[] = {
2469 #ifdef WITH_STATS
2470         { "status",     RAD_LISTEN_NONE },
2471 #endif
2472         { "auth",       RAD_LISTEN_AUTH },
2473 #ifdef WITH_ACCOUNTING
2474         { "acct",       RAD_LISTEN_ACCT },
2475 #endif
2476 #ifdef WITH_DETAIL
2477         { "detail",     RAD_LISTEN_DETAIL },
2478 #endif
2479 #ifdef WITH_PROXY
2480         { "proxy",      RAD_LISTEN_PROXY },
2481 #endif
2482 #ifdef WITH_VMPS
2483         { "vmps",       RAD_LISTEN_VQP },
2484 #endif
2485 #ifdef WITH_DHCP
2486         { "dhcp",       RAD_LISTEN_DHCP },
2487 #endif
2488 #ifdef WITH_COMMAND_SOCKET
2489         { "control",    RAD_LISTEN_COMMAND },
2490 #endif
2491 #ifdef WITH_COA
2492         { "coa",        RAD_LISTEN_COA },
2493 #endif
2494         { NULL, 0 },
2495 };
2496
2497
2498 static rad_listen_t *listen_parse(CONF_SECTION *cs, const char *server)
2499 {
2500         int             type, rcode;
2501         char            *listen_type;
2502         rad_listen_t    *this;
2503
2504         listen_type = NULL;
2505
2506         cf_log_info(cs, "listen {");
2507
2508         rcode = cf_item_parse(cs, "type", PW_TYPE_STRING_PTR,
2509                               &listen_type, "");
2510         if (rcode < 0) return NULL;
2511         if (rcode == 1) {
2512                 free(listen_type);
2513                 cf_log_err(cf_sectiontoitem(cs),
2514                            "No type specified in listen section");
2515                 return NULL;
2516         }
2517
2518         type = fr_str2int(listen_compare, listen_type, -1);
2519         if (type < 0) {
2520                 cf_log_err(cf_sectiontoitem(cs),
2521                            "Invalid type \"%s\" in listen section.",
2522                            listen_type);
2523                 free(listen_type);
2524                 return NULL;
2525         }
2526         free(listen_type);
2527
2528         /*
2529          *      Allow listen sections in the default config to
2530          *      refer to a server.
2531          */
2532         if (!server) {
2533                 rcode = cf_item_parse(cs, "virtual_server", PW_TYPE_STRING_PTR,
2534                                       &server, NULL);
2535                 if (rcode == 1) { /* compatiblity with 2.0-pre */
2536                         rcode = cf_item_parse(cs, "server", PW_TYPE_STRING_PTR,
2537                                               &server, NULL);
2538                 }
2539                 if (rcode < 0) return NULL;
2540         }
2541
2542 #ifdef WITH_PROXY
2543         /*
2544          *      We were passed a virtual server, so the caller is
2545          *      defining a proxy listener inside of a virtual server.
2546          *      This isn't allowed right now.
2547          */
2548         else if (type == RAD_LISTEN_PROXY) {
2549                 radlog(L_ERR, "Error: listen type \"proxy\" Cannot appear in a virtual server section");
2550                 return NULL;
2551         }
2552 #endif
2553
2554         /*
2555          *      Set up cross-type data.
2556          */
2557         this = listen_alloc(type);
2558         this->server = server;
2559         this->fd = -1;
2560
2561         /*
2562          *      Call per-type parser.
2563          */
2564         if (master_listen[type].parse(cs, this) < 0) {
2565                 listen_free(&this);
2566                 return NULL;
2567         }
2568
2569         cf_log_info(cs, "}");
2570
2571         return this;
2572 }
2573
2574 #ifdef WITH_PROXY
2575 static int is_loopback(const fr_ipaddr_t *ipaddr)
2576 {
2577         /*
2578          *      We shouldn't proxy on loopback.
2579          */
2580         if ((ipaddr->af == AF_INET) &&
2581             (ipaddr->ipaddr.ip4addr.s_addr == htonl(INADDR_LOOPBACK))) {
2582                 return 1;
2583         }
2584
2585 #ifdef HAVE_STRUCT_SOCKADDR_IN6
2586         if ((ipaddr->af == AF_INET6) &&
2587             (IN6_IS_ADDR_LINKLOCAL(&ipaddr->ipaddr.ip6addr))) {
2588                 return 1;
2589         }
2590 #endif
2591
2592         return 0;
2593 }
2594 #endif
2595
2596 /*
2597  *      Generate a list of listeners.  Takes an input list of
2598  *      listeners, too, so we don't close sockets with waiting packets.
2599  */
2600 int listen_init(CONF_SECTION *config, rad_listen_t **head, int spawn_flag)
2601 {
2602         int             override = FALSE;
2603         int             rcode;
2604         CONF_SECTION    *cs = NULL;
2605         rad_listen_t    **last;
2606         rad_listen_t    *this;
2607         fr_ipaddr_t     server_ipaddr;
2608         int             auth_port = 0;
2609 #ifdef WITH_PROXY
2610         int             defined_proxy = 0;
2611 #endif
2612
2613         /*
2614          *      We shouldn't be called with a pre-existing list.
2615          */
2616         rad_assert(head && (*head == NULL));
2617
2618         last = head;
2619         server_ipaddr.af = AF_UNSPEC;
2620
2621         /*
2622          *      If the port is specified on the command-line,
2623          *      it over-rides the configuration file.
2624          *
2625          *      FIXME: If argv[0] == "vmpsd", then don't listen on auth/acct!
2626          */
2627         if (mainconfig.port >= 0) auth_port = mainconfig.port;
2628
2629         /*
2630          *      If the IP address was configured on the command-line,
2631          *      use that as the "bind_address"
2632          */
2633         if (mainconfig.myip.af != AF_UNSPEC) {
2634                 memcpy(&server_ipaddr, &mainconfig.myip,
2635                        sizeof(server_ipaddr));
2636                 override = TRUE;
2637                 goto bind_it;
2638         }
2639
2640         /*
2641          *      Else look for bind_address and/or listen sections.
2642          */
2643         server_ipaddr.ipaddr.ip4addr.s_addr = htonl(INADDR_NONE);
2644         rcode = cf_item_parse(config, "bind_address",
2645                               PW_TYPE_IPADDR,
2646                               &server_ipaddr.ipaddr.ip4addr, NULL);
2647         if (rcode < 0) return -1; /* error parsing it */
2648
2649         if (rcode == 0) { /* successfully parsed IPv4 */
2650                 listen_socket_t *sock;
2651                 server_ipaddr.af = AF_INET;
2652
2653                 radlog(L_INFO, "WARNING: The directive 'bind_address' is deprecated, and will be removed in future versions of FreeRADIUS. Please edit the configuration files to use the directive 'listen'.");
2654
2655         bind_it:
2656 #ifdef WITH_VMPS
2657                 if (strcmp(progname, "vmpsd") == 0) {
2658                         this = listen_alloc(RAD_LISTEN_VQP);
2659                         if (!auth_port) auth_port = 1589;
2660                 } else
2661 #endif
2662                         this = listen_alloc(RAD_LISTEN_AUTH);
2663
2664                 sock = this->data;
2665
2666                 sock->my_ipaddr = server_ipaddr;
2667                 sock->my_port = auth_port;
2668
2669                 sock->clients = clients_parse_section(config);
2670                 if (!sock->clients) {
2671                         cf_log_err(cf_sectiontoitem(config),
2672                                    "Failed to find any clients for this listen section");
2673                         listen_free(&this);
2674                         return -1;
2675                 }
2676
2677                 if (listen_bind(this) < 0) {
2678                         listen_free(head);
2679                         radlog(L_ERR, "There appears to be another RADIUS server running on the authentication port %d", sock->my_port);
2680                         listen_free(&this);
2681                         return -1;
2682                 }
2683                 auth_port = sock->my_port;      /* may have been updated in listen_bind */
2684                 if (override) {
2685                         cs = cf_section_sub_find_name2(config, "server",
2686                                                        mainconfig.name);
2687                         if (cs) this->server = mainconfig.name;
2688                 }
2689
2690                 *last = this;
2691                 last = &(this->next);
2692
2693 #ifdef WITH_VMPS
2694                 /*
2695                  *      No acct for vmpsd
2696                  */
2697                 if (strcmp(progname, "vmpsd") == 0) goto add_sockets;
2698 #endif
2699
2700 #ifdef WITH_ACCOUNTING
2701                 /*
2702                  *      Open Accounting Socket.
2703                  *
2704                  *      If we haven't already gotten acct_port from
2705                  *      /etc/services, then make it auth_port + 1.
2706                  */
2707                 this = listen_alloc(RAD_LISTEN_ACCT);
2708                 sock = this->data;
2709
2710                 /*
2711                  *      Create the accounting socket.
2712                  *
2713                  *      The accounting port is always the
2714                  *      authentication port + 1
2715                  */
2716                 sock->my_ipaddr = server_ipaddr;
2717                 sock->my_port = auth_port + 1;
2718
2719                 sock->clients = clients_parse_section(config);
2720                 if (!sock->clients) {
2721                         cf_log_err(cf_sectiontoitem(config),
2722                                    "Failed to find any clients for this listen section");
2723                         return -1;
2724                 }
2725
2726                 if (listen_bind(this) < 0) {
2727                         listen_free(&this);
2728                         listen_free(head);
2729                         radlog(L_ERR, "There appears to be another RADIUS server running on the accounting port %d", sock->my_port);
2730                         return -1;
2731                 }
2732
2733                 if (override) {
2734                         cs = cf_section_sub_find_name2(config, "server",
2735                                                        mainconfig.name);
2736                         if (cs) this->server = mainconfig.name;
2737                 }
2738
2739                 *last = this;
2740                 last = &(this->next);
2741 #endif
2742         } else if (mainconfig.port > 0) { /* no bind address, but a port */
2743                 radlog(L_ERR, "The command-line says \"-p %d\", but there is no associated IP address to use",
2744                        mainconfig.port);
2745                 return -1;
2746         }
2747
2748         /*
2749          *      They specified an IP on the command-line, ignore
2750          *      all listen sections except the one in '-n'.
2751          */
2752         if (mainconfig.myip.af != AF_UNSPEC) {
2753                 CONF_SECTION *subcs;
2754                 const char *name2 = cf_section_name2(cs);
2755
2756                 cs = cf_section_sub_find_name2(config, "server",
2757                                                mainconfig.name);
2758                 if (!cs) goto add_sockets;
2759
2760                 /*
2761                  *      Should really abstract this code...
2762                  */
2763                 for (subcs = cf_subsection_find_next(cs, NULL, "listen");
2764                      subcs != NULL;
2765                      subcs = cf_subsection_find_next(cs, subcs, "listen")) {
2766                         this = listen_parse(subcs, name2);
2767                         if (!this) {
2768                                 listen_free(head);
2769                                 return -1;
2770                         }
2771
2772                         *last = this;
2773                         last = &(this->next);
2774                 } /* loop over "listen" directives in server <foo> */
2775
2776                 goto add_sockets;
2777         }
2778
2779         /*
2780          *      Walk through the "listen" sections, if they exist.
2781          */
2782         for (cs = cf_subsection_find_next(config, NULL, "listen");
2783              cs != NULL;
2784              cs = cf_subsection_find_next(config, cs, "listen")) {
2785                 this = listen_parse(cs, NULL);
2786                 if (!this) {
2787                         listen_free(head);
2788                         return -1;
2789                 }
2790
2791                 *last = this;
2792                 last = &(this->next);
2793         }
2794
2795         /*
2796          *      Check virtual servers for "listen" sections, too.
2797          *
2798          *      FIXME: Move to virtual server init?
2799          */
2800         for (cs = cf_subsection_find_next(config, NULL, "server");
2801              cs != NULL;
2802              cs = cf_subsection_find_next(config, cs, "server")) {
2803                 CONF_SECTION *subcs;
2804                 const char *name2 = cf_section_name2(cs);
2805
2806                 for (subcs = cf_subsection_find_next(cs, NULL, "listen");
2807                      subcs != NULL;
2808                      subcs = cf_subsection_find_next(cs, subcs, "listen")) {
2809                         this = listen_parse(subcs, name2);
2810                         if (!this) {
2811                                 listen_free(head);
2812                                 return -1;
2813                         }
2814
2815                         *last = this;
2816                         last = &(this->next);
2817                 } /* loop over "listen" directives in virtual servers */
2818         } /* loop over virtual servers */
2819
2820 add_sockets:
2821         /*
2822          *      No sockets to receive packets, this is an error.
2823          *      proxying is pointless.
2824          */
2825         if (!*head) {
2826                 radlog(L_ERR, "The server is not configured to listen on any ports.  Cannot start.");
2827                 return -1;
2828         }
2829
2830         /*
2831          *      Print out which sockets we're listening on, and
2832          *      add them to the event list.
2833          */
2834         for (this = *head; this != NULL; this = this->next) {
2835 #ifdef WITH_PROXY
2836                 if (this->type == RAD_LISTEN_PROXY) {
2837                         defined_proxy = 1;
2838                 }
2839
2840 #endif
2841
2842 #ifdef WITH_TLS
2843                 if (!spawn_flag && this->tls) {
2844                         cf_log_err(cf_sectiontoitem(this->cs), "Threading must be enabled for TLS sockets to function properly.");
2845                         cf_log_err(cf_sectiontoitem(this->cs), "You probably need to do 'radiusd -fxx -l stdout' for debugging");
2846                         return -1;
2847                 }
2848 #endif
2849                 event_new_fd(this);
2850         }
2851
2852         /*
2853          *      If we're proxying requests, open the proxy FD.
2854          *      Otherwise, don't do anything.
2855          */
2856 #ifdef WITH_PROXY
2857         if ((mainconfig.proxy_requests == TRUE) &&
2858             (*head != NULL) && !defined_proxy) {
2859                 listen_socket_t *sock = NULL;
2860                 int             port = 0;
2861                 home_server     home;
2862
2863                 memset(&home, 0, sizeof(home));
2864
2865                 /*
2866                  *
2867                  */
2868                 home.proto = IPPROTO_UDP;
2869                 home.src_ipaddr = server_ipaddr;
2870
2871                 /*
2872                  *      Find the first authentication port,
2873                  *      and use it
2874                  */
2875                 for (this = *head; this != NULL; this = this->next) {
2876                         if (this->type == RAD_LISTEN_AUTH) {
2877                                 sock = this->data;
2878
2879                                 if (is_loopback(&sock->my_ipaddr)) continue;
2880
2881                                 if (home.src_ipaddr.af == AF_UNSPEC) {
2882                                         home.src_ipaddr = sock->my_ipaddr;
2883                                 }
2884                                 port = sock->my_port + 2;
2885                                 break;
2886                         }
2887 #ifdef WITH_ACCT
2888                         if (this->type == RAD_LISTEN_ACCT) {
2889                                 sock = this->data;
2890
2891                                 if (is_loopback(&sock->my_ipaddr)) continue;
2892
2893                                 if (home.src_ipaddr.af == AF_UNSPEC) {
2894                                         home.src_ipaddr = sock->my_ipaddr;
2895                                 }
2896                                 port = sock->my_port + 1;
2897                                 break;
2898                         }
2899 #endif
2900                 }
2901
2902                 /*
2903                  *      Address is still unspecified, use IPv4.
2904                  */
2905                 if (home.src_ipaddr.af == AF_UNSPEC) {
2906                         home.src_ipaddr.af = AF_INET;
2907                         /* everything else is already set to zero */
2908                 }
2909
2910                 home.ipaddr.af = home.src_ipaddr.af;
2911                 /* everything else is already set to zero */
2912
2913                 if (!proxy_new_listener(&home, port)) {
2914                         listen_free(head);
2915                         return -1;
2916                 }
2917         }
2918 #endif
2919
2920         /*
2921          *      Haven't defined any sockets.  Die.
2922          */
2923         if (!*head) return -1;
2924
2925         xlat_register("listen", xlat_listen, NULL);
2926
2927         return 0;
2928 }
2929
2930 /*
2931  *      Free a linked list of listeners;
2932  */
2933 void listen_free(rad_listen_t **head)
2934 {
2935         rad_listen_t *this;
2936
2937         if (!head || !*head) return;
2938
2939         this = *head;
2940         while (this) {
2941                 rad_listen_t *next = this->next;
2942
2943                 /*
2944                  *      Other code may have eaten the FD.
2945                  */
2946                 if (this->fd >= 0) close(this->fd);
2947
2948                 if (master_listen[this->type].free) {
2949                         master_listen[this->type].free(this);
2950                 }
2951
2952 #ifdef WITH_TLS
2953                 if (this->tls) tls_server_conf_free(this->tls);
2954 #endif
2955
2956 #ifdef WITH_TCP
2957                 if ((this->type == RAD_LISTEN_AUTH)
2958 #ifdef WITH_ACCT
2959                     || (this->type == RAD_LISTEN_ACCT)
2960 #endif
2961 #ifdef WITH_PROXY
2962                     || (this->type == RAD_LISTEN_PROXY)
2963 #endif
2964                         ) {
2965                         listen_socket_t *sock = this->data;
2966
2967 #ifdef WITH_TLS
2968                         if (sock->request) {
2969                                 pthread_mutex_destroy(&(sock->mutex));
2970                                 request_free(&sock->request);
2971                                 sock->packet = NULL;
2972
2973                                 if (sock->ssn) session_free(sock->ssn);
2974                                 request_free(&sock->request);
2975                         } else
2976 #endif
2977                                 rad_free(&sock->packet);
2978
2979                 }
2980 #endif  /* WITH_TCP */
2981
2982                 free(this->data);
2983                 free(this);
2984
2985                 this = next;
2986         }
2987
2988         *head = NULL;
2989 }
2990
2991 #ifdef WITH_STATS
2992 RADCLIENT_LIST *listener_find_client_list(const fr_ipaddr_t *ipaddr,
2993                                           int port)
2994 {
2995         rad_listen_t *this;
2996
2997         for (this = mainconfig.listen; this != NULL; this = this->next) {
2998                 listen_socket_t *sock;
2999
3000                 if ((this->type != RAD_LISTEN_AUTH)
3001 #ifdef WITH_ACCOUNTING
3002                     && (this->type != RAD_LISTEN_ACCT)
3003 #endif
3004                     ) continue;
3005
3006                 sock = this->data;
3007
3008                 if ((sock->my_port == port) &&
3009                     (fr_ipaddr_cmp(ipaddr, &sock->my_ipaddr) == 0)) {
3010                         return sock->clients;
3011                 }
3012         }
3013
3014         return NULL;
3015 }
3016 #endif
3017
3018 rad_listen_t *listener_find_byipaddr(const fr_ipaddr_t *ipaddr, int port, int proto)
3019 {
3020         rad_listen_t *this;
3021
3022         for (this = mainconfig.listen; this != NULL; this = this->next) {
3023                 listen_socket_t *sock;
3024
3025                 sock = this->data;
3026
3027                 if (sock->my_port != port) continue;
3028                 if (sock->proto != proto) continue;
3029                 if (fr_ipaddr_cmp(ipaddr, &sock->my_ipaddr) != 0) continue;
3030
3031                 return this;
3032         }
3033
3034         /*
3035          *      Failed to find a specific one.  Find INADDR_ANY
3036          */
3037         for (this = mainconfig.listen; this != NULL; this = this->next) {
3038                 listen_socket_t *sock;
3039
3040                 sock = this->data;
3041
3042                 if (sock->my_port != port) continue;
3043                 if (sock->proto != proto) continue;
3044                 if (!fr_inaddr_any(&sock->my_ipaddr)) continue;
3045
3046                 return this;
3047         }
3048
3049         return NULL;
3050 }