src/main/tls_listen.c

   1 /*
   2  * tls.c
   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 2001  hereUare Communications, Inc. <raghud@hereuare.com>
  21  * Copyright 2003  Alan DeKok <aland@freeradius.org>
  22  * Copyright 2006  The FreeRADIUS server project
  23  */
  24
  25 RCSID("$Id$")
  26 USES_APPLE_DEPRECATED_API       /* OpenSSL API has been deprecated by Apple */
  27
  28 #include <freeradius-devel/radiusd.h>
  29 #include <freeradius-devel/process.h>
  30 #include <freeradius-devel/rad_assert.h>
  31
  32 #ifdef HAVE_SYS_STAT_H
  33 #include <sys/stat.h>
  34 #endif
  35
  36 #ifdef WITH_TCP
  37 #ifdef WITH_TLS
  38 #ifdef HAVE_OPENSSL_RAND_H
  39 #include <openssl/rand.h>
  40 #endif
  41
  42 #ifdef HAVE_OPENSSL_OCSP_H
  43 #include <openssl/ocsp.h>
  44 #endif
  45
  46 #ifdef HAVE_PTHREAD_H
  47 #define PTHREAD_MUTEX_LOCK pthread_mutex_lock
  48 #define PTHREAD_MUTEX_UNLOCK pthread_mutex_unlock
  49 #else
  50 #define PTHREAD_MUTEX_LOCK(_x)
  51 #define PTHREAD_MUTEX_UNLOCK(_x)
  52 #endif
  53
  54 static void dump_hex(char const *msg, uint8_t const *data, size_t data_len)
  55 {
  56         size_t i;
  57
  58         if (rad_debug_lvl < 3) return;
  59
  60         printf("%s %d\n", msg, (int) data_len);
  61         if (data_len > 256) data_len = 256;
  62
  63         for (i = 0; i < data_len; i++) {
  64                 if ((i & 0x0f) == 0x00) printf ("%02x: ", (unsigned int) i);
  65                 printf("%02x ", data[i]);
  66                 if ((i & 0x0f) == 0x0f) printf ("\n");
  67         }
  68         printf("\n");
  69         fflush(stdout);
  70 }
  71
  72 static void tls_socket_close(rad_listen_t *listener)
  73 {
  74         listen_socket_t *sock = listener->data;
  75
  76         SSL_shutdown(sock->ssn->ssl);
  77
  78         listener->status = RAD_LISTEN_STATUS_EOL;
  79         listener->tls = NULL; /* parent owns this! */
  80
  81         /*
  82          *      Tell the event handler that an FD has disappeared.
  83          */
  84         DEBUG("Client has closed connection");
  85         radius_update_listener(listener);
  86
  87         /*
  88          *      Do NOT free the listener here.  It's in use by
  89          *      a request, and will need to hang around until
  90          *      all of the requests are done.
  91          *
  92          *      It is instead free'd in remove_from_request_hash()
  93          */
  94 }
  95
  96 static int CC_HINT(nonnull) tls_socket_write(rad_listen_t *listener, REQUEST *request)
  97 {
  98         uint8_t *p;
  99         ssize_t rcode;
 100         listen_socket_t *sock = listener->data;
 101
 102         p = sock->ssn->dirty_out.data;
 103
 104         while (p < (sock->ssn->dirty_out.data + sock->ssn->dirty_out.used)) {
 105                 RDEBUG3("Writing to socket %d", request->packet->sockfd);
 106                 rcode = write(request->packet->sockfd, p,
 107                               (sock->ssn->dirty_out.data + sock->ssn->dirty_out.used) - p);
 108                 if (rcode <= 0) {
 109                         RDEBUG("Error writing to TLS socket: %s", fr_syserror(errno));
 110
 111                         tls_socket_close(listener);
 112                         return 0;
 113                 }
 114                 p += rcode;
 115         }
 116
 117         sock->ssn->dirty_out.used = 0;
 118
 119         return 1;
 120 }
 121
 122
 123 static int tls_socket_recv(rad_listen_t *listener)
 124 {
 125         bool doing_init = false;
 126         ssize_t rcode;
 127         RADIUS_PACKET *packet;
 128         REQUEST *request;
 129         listen_socket_t *sock = listener->data;
 130         fr_tls_status_t status;
 131         RADCLIENT *client = sock->client;
 132
 133         if (!sock->packet) {
 134                 sock->packet = rad_alloc(sock, false);
 135                 if (!sock->packet) return 0;
 136
 137                 sock->packet->sockfd = listener->fd;
 138                 sock->packet->src_ipaddr = sock->other_ipaddr;
 139                 sock->packet->src_port = sock->other_port;
 140                 sock->packet->dst_ipaddr = sock->my_ipaddr;
 141                 sock->packet->dst_port = sock->my_port;
 142
 143                 if (sock->request) sock->request->packet = talloc_steal(sock->request, sock->packet);
 144         }
 145
 146         /*
 147          *      Allocate a REQUEST for debugging, and initialize the TLS session.
 148          */
 149         if (!sock->request) {
 150                 sock->request = request = request_alloc(sock);
 151                 if (!sock->request) {
 152                         ERROR("Out of memory");
 153                         return 0;
 154                 }
 155
 156                 rad_assert(request->packet == NULL);
 157                 rad_assert(sock->packet != NULL);
 158                 request->packet = talloc_steal(request, sock->packet);
 159
 160                 request->component = "<tls-connect>";
 161
 162                 request->reply = rad_alloc(request, false);
 163                 if (!request->reply) return 0;
 164
 165                 rad_assert(sock->ssn == NULL);
 166
 167                 sock->ssn = tls_new_session(sock, listener->tls, sock->request,
 168                                             listener->tls->require_client_cert);
 169                 if (!sock->ssn) {
 170                         TALLOC_FREE(sock->request);
 171                         sock->packet = NULL;
 172                         return 0;
 173                 }
 174
 175                 SSL_set_ex_data(sock->ssn->ssl, FR_TLS_EX_INDEX_REQUEST, (void *)request);
 176                 SSL_set_ex_data(sock->ssn->ssl, fr_tls_ex_index_certs, (void *) &sock->certs);
 177                 SSL_set_ex_data(sock->ssn->ssl, FR_TLS_EX_INDEX_TALLOC, NULL);
 178
 179                 doing_init = true;
 180         }
 181
 182         rad_assert(sock->request != NULL);
 183         rad_assert(sock->request->packet != NULL);
 184         rad_assert(sock->packet != NULL);
 185         rad_assert(sock->ssn != NULL);
 186
 187         request = sock->request;
 188
 189         RDEBUG3("Reading from socket %d", request->packet->sockfd);
 190         PTHREAD_MUTEX_LOCK(&sock->mutex);
 191         rcode = read(request->packet->sockfd,
 192                      sock->ssn->dirty_in.data,
 193                      sizeof(sock->ssn->dirty_in.data));
 194         if ((rcode < 0) && (errno == ECONNRESET)) {
 195         do_close:
 196                 DEBUG("Closing TLS socket from client port %u", sock->other_port);
 197                 tls_socket_close(listener);
 198                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 199                 return 0;
 200         }
 201
 202         if (rcode < 0) {
 203                 RDEBUG("Error reading TLS socket: %s", fr_syserror(errno));
 204                 goto do_close;
 205         }
 206
 207         /*
 208          *      Normal socket close.
 209          */
 210         if (rcode == 0) goto do_close;
 211
 212         sock->ssn->dirty_in.used = rcode;
 213
 214         dump_hex("READ FROM SSL", sock->ssn->dirty_in.data, sock->ssn->dirty_in.used);
 215
 216         /*
 217          *      Catch attempts to use non-SSL.
 218          */
 219         if (doing_init && (sock->ssn->dirty_in.data[0] != handshake)) {
 220                 RDEBUG("Non-TLS data sent to TLS socket: closing");
 221                 goto do_close;
 222         }
 223
 224         /*
 225          *      If we need to do more initialization, do that here.
 226          */
 227         if (!SSL_is_init_finished(sock->ssn->ssl)) {
 228                 if (!tls_handshake_recv(request, sock->ssn)) {
 229                         RDEBUG("FAILED in TLS handshake receive");
 230                         goto do_close;
 231                 }
 232
 233                 /*
 234                  *      More ACK data to send.  Do so.
 235                  */
 236                 if (sock->ssn->dirty_out.used > 0) {
 237                         tls_socket_write(listener, request);
 238                         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 239                         return 0;
 240                 }
 241
 242                 /*
 243                  *      FIXME: Run the request through a virtual
 244                  *      server in order to see if we like the
 245                  *      certificate presented by the client.
 246                  */
 247         }
 248
 249         /*
 250          *      Try to get application data.
 251          */
 252         status = tls_application_data(sock->ssn, request);
 253         RDEBUG("Application data status %d", status);
 254
 255         if (status == FR_TLS_MORE_FRAGMENTS) {
 256                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 257                 return 0;
 258         }
 259
 260         if (sock->ssn->clean_out.used == 0) {
 261                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 262                 return 0;
 263         }
 264
 265         /*
 266          *      We now have a bunch of application data.
 267          */
 268         dump_hex("TUNNELED DATA > ", sock->ssn->clean_out.data, sock->ssn->clean_out.used);
 269
 270         /*
 271          *      If the packet is a complete RADIUS packet, return it to
 272          *      the caller.  Otherwise...
 273          */
 274         if ((sock->ssn->clean_out.used < 20) ||
 275             (((sock->ssn->clean_out.data[2] << 8) | sock->ssn->clean_out.data[3]) != (int) sock->ssn->clean_out.used)) {
 276                 RDEBUG("Received bad packet: Length %zd contents %d",
 277                        sock->ssn->clean_out.used,
 278                        (sock->ssn->clean_out.data[2] << 8) | sock->ssn->clean_out.data[3]);
 279                 goto do_close;
 280         }
 281
 282         packet = sock->packet;
 283         packet->data = talloc_array(packet, uint8_t, sock->ssn->clean_out.used);
 284         packet->data_len = sock->ssn->clean_out.used;
 285         sock->ssn->record_minus(&sock->ssn->clean_out, packet->data, packet->data_len);
 286         packet->vps = NULL;
 287         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 288
 289         if (!rad_packet_ok(packet, 0, NULL)) {
 290                 if (DEBUG_ENABLED) ERROR("Receive - %s", fr_strerror());
 291                 DEBUG("Closing TLS socket from client");
 292                 PTHREAD_MUTEX_LOCK(&sock->mutex);
 293                 tls_socket_close(listener);
 294                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 295                 return 0;       /* do_close unlocks the mutex */
 296         }
 297
 298         /*
 299          *      Copied from src/lib/radius.c, rad_recv();
 300          */
 301         if (fr_debug_lvl) {
 302                 char host_ipaddr[128];
 303
 304                 if (is_radius_code(packet->code)) {
 305                         RDEBUG("tls_recv: %s packet from host %s port %d, id=%d, length=%d",
 306                                fr_packet_codes[packet->code],
 307                                inet_ntop(packet->src_ipaddr.af,
 308                                          &packet->src_ipaddr.ipaddr,
 309                                          host_ipaddr, sizeof(host_ipaddr)),
 310                                packet->src_port,
 311                                packet->id, (int) packet->data_len);
 312                 } else {
 313                         RDEBUG("tls_recv: Packet from host %s port %d code=%d, id=%d, length=%d",
 314                                inet_ntop(packet->src_ipaddr.af,
 315                                          &packet->src_ipaddr.ipaddr,
 316                                          host_ipaddr, sizeof(host_ipaddr)),
 317                                packet->src_port,
 318                                packet->code,
 319                                packet->id, (int) packet->data_len);
 320                 }
 321         }
 322
 323         FR_STATS_INC(auth, total_requests);
 324
 325         return 1;
 326 }
 327
 328
 329 int dual_tls_recv(rad_listen_t *listener)
 330 {
 331         RADIUS_PACKET *packet;
 332         RAD_REQUEST_FUNP fun = NULL;
 333         listen_socket_t *sock = listener->data;
 334         RADCLIENT       *client = sock->client;
 335
 336         if (listener->status != RAD_LISTEN_STATUS_KNOWN) return 0;
 337
 338         if (!tls_socket_recv(listener)) {
 339                 return 0;
 340         }
 341
 342         rad_assert(sock->packet != NULL);
 343         rad_assert(sock->ssn != NULL);
 344         rad_assert(client != NULL);
 345
 346         packet = talloc_steal(NULL, sock->packet);
 347         sock->packet = NULL;
 348
 349         /*
 350          *      Some sanity checks, based on the packet code.
 351          *
 352          *      "auth+acct" are marked as "auth", with the "dual" flag
 353          *      set.
 354          */
 355         switch (packet->code) {
 356         case PW_CODE_ACCESS_REQUEST:
 357                 if (listener->type != RAD_LISTEN_AUTH) goto bad_packet;
 358                 FR_STATS_INC(auth, total_requests);
 359                 fun = rad_authenticate;
 360                 break;
 361
 362 #ifdef WITH_ACCOUNTING
 363         case PW_CODE_ACCOUNTING_REQUEST:
 364                 if (listener->type != RAD_LISTEN_ACCT) {
 365                         /*
 366                          *      Allow auth + dual.  Disallow
 367                          *      everything else.
 368                          */
 369                         if (!((listener->type == RAD_LISTEN_AUTH) &&
 370                               (listener->dual))) {
 371                                     goto bad_packet;
 372                         }
 373                 }
 374                 FR_STATS_INC(acct, total_requests);
 375                 fun = rad_accounting;
 376                 break;
 377 #endif
 378
 379         case PW_CODE_STATUS_SERVER:
 380                 if (!main_config.status_server) {
 381                         FR_STATS_INC(auth, total_unknown_types);
 382                         WARN("Ignoring Status-Server request due to security configuration");
 383                         rad_free(&packet);
 384                         return 0;
 385                 }
 386                 fun = rad_status_server;
 387                 break;
 388
 389         default:
 390         bad_packet:
 391                 FR_STATS_INC(auth, total_unknown_types);
 392
 393                 DEBUG("Invalid packet code %d sent from client %s port %d : IGNORED",
 394                       packet->code, client->shortname, packet->src_port);
 395                 rad_free(&packet);
 396                 return 0;
 397         } /* switch over packet types */
 398
 399         if (!request_receive(NULL, listener, packet, client, fun)) {
 400                 FR_STATS_INC(auth, total_packets_dropped);
 401                 rad_free(&packet);
 402                 return 0;
 403         }
 404
 405         return 1;
 406 }
 407
 408
 409 /*
 410  *      Send a response packet
 411  */
 412 int dual_tls_send(rad_listen_t *listener, REQUEST *request)
 413 {
 414         listen_socket_t *sock = listener->data;
 415
 416         VERIFY_REQUEST(request);
 417
 418         rad_assert(request->listener == listener);
 419         rad_assert(listener->send == dual_tls_send);
 420
 421         if (listener->status != RAD_LISTEN_STATUS_KNOWN) return 0;
 422
 423         /*
 424          *      Accounting reject's are silently dropped.
 425          *
 426          *      We do it here to avoid polluting the rest of the
 427          *      code with this knowledge
 428          */
 429         if (request->reply->code == 0) return 0;
 430
 431         /*
 432          *      Pack the VPs
 433          */
 434         if (rad_encode(request->reply, request->packet,
 435                        request->client->secret) < 0) {
 436                 RERROR("Failed encoding packet: %s", fr_strerror());
 437                 return 0;
 438         }
 439
 440         if (request->reply->data_len > (MAX_PACKET_LEN - 100)) {
 441                 RWARN("Packet is large, and possibly truncated - %zd vs max %d",
 442                       request->reply->data_len, MAX_PACKET_LEN);
 443         }
 444
 445         /*
 446          *      Sign the packet.
 447          */
 448         if (rad_sign(request->reply, request->packet,
 449                        request->client->secret) < 0) {
 450                 RERROR("Failed signing packet: %s", fr_strerror());
 451                 return 0;
 452         }
 453
 454         PTHREAD_MUTEX_LOCK(&sock->mutex);
 455
 456         /*
 457          *      Write the packet to the SSL buffers.
 458          */
 459         sock->ssn->record_plus(&sock->ssn->clean_in,
 460                                request->reply->data, request->reply->data_len);
 461
 462         dump_hex("TUNNELED DATA < ", sock->ssn->clean_in.data, sock->ssn->clean_in.used);
 463
 464         /*
 465          *      Do SSL magic to get encrypted data.
 466          */
 467         tls_handshake_send(request, sock->ssn);
 468
 469         /*
 470          *      And finally write the data to the socket.
 471          */
 472         if (sock->ssn->dirty_out.used > 0) {
 473                 dump_hex("WRITE TO SSL", sock->ssn->dirty_out.data, sock->ssn->dirty_out.used);
 474
 475                 tls_socket_write(listener, request);
 476         }
 477         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 478
 479         return 0;
 480 }
 481
 482 static int try_connect(tls_session_t *ssn)
 483 {
 484         int ret;
 485         ret = SSL_connect(ssn->ssl);
 486         if (ret < 0) {
 487                 switch (SSL_get_error(ssn->ssl, ret)) {
 488                         default:
 489                                 break;
 490
 491
 492
 493                 case SSL_ERROR_WANT_READ:
 494                 case SSL_ERROR_WANT_WRITE:
 495                         ssn->connected = false;
 496                         return 0;
 497                 }
 498         }
 499
 500         if (ret <= 0) {
 501                 tls_error_io_log(NULL, ssn, ret, "Failed in " STRINGIFY(__FUNCTION__) " (SSL_connect)");
 502                 talloc_free(ssn);
 503
 504                 return -1;
 505         }
 506
 507         return 1;
 508 }
 509
 510
 511 #ifdef WITH_PROXY
 512 /*
 513  *      Read from the SSL socket.  Safe with either blocking or
 514  *      non-blocking IO.  This level of complexity is probably not
 515  *      necessary, as each packet gets put into one SSL application
 516  *      record.  When SSL has a full record, we should be able to read
 517  *      the entire packet via one SSL_read().
 518  *
 519  *      When SSL has a partial record, SSL_read() will return
 520  *      WANT_READ or WANT_WRITE, and zero application data.
 521  *
 522  *      Called with the mutex held.
 523  */
 524 static ssize_t proxy_tls_read(rad_listen_t *listener)
 525 {
 526         int rcode;
 527         size_t length;
 528         uint8_t *data;
 529         listen_socket_t *sock = listener->data;
 530
 531         if (!sock->ssn->connected) {
 532                 rcode = try_connect(sock->ssn);
 533                 if (rcode == 0) return 0;
 534
 535                 if (rcode < 0) {
 536                         SSL_shutdown(sock->ssn->ssl);
 537                         return -1;
 538                 }
 539
 540                 sock->ssn->connected = true;
 541         }
 542
 543         /*
 544          *      Get the maximum size of data to receive.
 545          */
 546         if (!sock->data) sock->data = talloc_array(sock, uint8_t,
 547                                                    sock->ssn->mtu);
 548
 549         data = sock->data;
 550
 551         if (sock->partial < 4) {
 552                 rcode = SSL_read(sock->ssn->ssl, data + sock->partial,
 553                                  4 - sock->partial);
 554                 if (rcode <= 0) {
 555                         int err = SSL_get_error(sock->ssn->ssl, rcode);
 556                         switch (err) {
 557                         case SSL_ERROR_WANT_READ:
 558                         case SSL_ERROR_WANT_WRITE:
 559                                 return 0; /* do some more work later */
 560
 561                         case SSL_ERROR_ZERO_RETURN:
 562                                 /* remote end sent close_notify, send one back */
 563                                 SSL_shutdown(sock->ssn->ssl);
 564
 565                         case SSL_ERROR_SYSCALL:
 566                         do_close:
 567                                 return -1;
 568
 569                         default:
 570                                 tls_error_log(NULL, "Failed in proxy receive");
 571
 572                                 goto do_close;
 573                         }
 574                 }
 575
 576                 sock->partial = rcode;
 577         } /* try reading the packet header */
 578
 579         if (sock->partial < 4) return 0; /* read more data */
 580
 581         length = (data[2] << 8) | data[3];
 582
 583         /*
 584          *      Do these checks only once, when we read the header.
 585          */
 586         if (sock->partial == 4) {
 587                 DEBUG3("Proxy received header saying we have a packet of %u bytes",
 588                        (unsigned int) length);
 589
 590                 /*
 591                  *      FIXME: allocate a RADIUS_PACKET, and set
 592                  *      "data" to be as large as necessary.
 593                  */
 594                 if (length > sock->ssn->mtu) {
 595                         INFO("Received packet will be too large! Set \"fragment_size = %u\"",
 596                              (data[2] << 8) | data[3]);
 597                         goto do_close;
 598                 }
 599         }
 600
 601         /*
 602          *      Try to read some more.
 603          */
 604         if (sock->partial < length) {
 605                 rcode = SSL_read(sock->ssn->ssl, data + sock->partial,
 606                                  length - sock->partial);
 607                 if (rcode <= 0) {
 608                         switch (SSL_get_error(sock->ssn->ssl, rcode)) {
 609                         case SSL_ERROR_WANT_READ:
 610                         case SSL_ERROR_WANT_WRITE:
 611                                 return 0;
 612
 613                         case SSL_ERROR_ZERO_RETURN:
 614                                 /* remote end sent close_notify, send one back */
 615                                 SSL_shutdown(sock->ssn->ssl);
 616                                 goto do_close;
 617                         default:
 618                                 goto do_close;
 619                         }
 620                 }
 621
 622                 sock->partial += rcode;
 623         }
 624
 625         /*
 626          *      If we're not done, say so.
 627          *
 628          *      Otherwise, reset the partially read data flag, and say
 629          *      we have a packet.
 630          */
 631         if (sock->partial < length) {
 632                 return 0;
 633         }
 634
 635         sock->partial = 0;      /* we've now read the packet */
 636         return length;
 637 }
 638
 639
 640 int proxy_tls_recv(rad_listen_t *listener)
 641 {
 642         listen_socket_t *sock = listener->data;
 643         char buffer[256];
 644         RADIUS_PACKET *packet;
 645         uint8_t *data;
 646         ssize_t data_len;
 647
 648         if (listener->status != RAD_LISTEN_STATUS_KNOWN) return 0;
 649
 650         DEBUG3("Proxy SSL socket has data to read");
 651         PTHREAD_MUTEX_LOCK(&sock->mutex);
 652         data_len = proxy_tls_read(listener);
 653         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 654
 655         if (data_len < 0) {
 656                 DEBUG("Closing TLS socket to home server");
 657                 PTHREAD_MUTEX_LOCK(&sock->mutex);
 658                 tls_socket_close(listener);
 659                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 660                 return 0;
 661         }
 662
 663         if (data_len == 0) return 0; /* not done yet */
 664
 665         data = sock->data;
 666
 667         packet = rad_alloc(sock, false);
 668         packet->sockfd = listener->fd;
 669         packet->src_ipaddr = sock->other_ipaddr;
 670         packet->src_port = sock->other_port;
 671         packet->dst_ipaddr = sock->my_ipaddr;
 672         packet->dst_port = sock->my_port;
 673         packet->code = data[0];
 674         packet->id = data[1];
 675         packet->data_len = data_len;
 676         packet->data = talloc_array(packet, uint8_t, packet->data_len);
 677         memcpy(packet->data, data, packet->data_len);
 678         memcpy(packet->vector, packet->data + 4, 16);
 679
 680         /*
 681          *      FIXME: Client MIB updates?
 682          */
 683         switch (packet->code) {
 684         case PW_CODE_ACCESS_ACCEPT:
 685         case PW_CODE_ACCESS_CHALLENGE:
 686         case PW_CODE_ACCESS_REJECT:
 687                 break;
 688
 689 #ifdef WITH_ACCOUNTING
 690         case PW_CODE_ACCOUNTING_RESPONSE:
 691                 break;
 692 #endif
 693
 694         default:
 695                 /*
 696                  *      FIXME: Update MIB for packet types?
 697                  */
 698                 ERROR("Invalid packet code %d sent to a proxy port "
 699                        "from home server %s port %d - ID %d : IGNORED",
 700                        packet->code,
 701                        ip_ntoh(&packet->src_ipaddr, buffer, sizeof(buffer)),
 702                        packet->src_port, packet->id);
 703                 rad_free(&packet);
 704                 return 0;
 705         }
 706
 707         if (!request_proxy_reply(packet)) {
 708                 rad_free(&packet);
 709                 return 0;
 710         }
 711
 712         return 1;
 713 }
 714
 715
 716 int proxy_tls_send(rad_listen_t *listener, REQUEST *request)
 717 {
 718         int rcode;
 719         listen_socket_t *sock = listener->data;
 720
 721         VERIFY_REQUEST(request);
 722
 723         if ((listener->status != RAD_LISTEN_STATUS_INIT) &&
 724             (listener->status != RAD_LISTEN_STATUS_KNOWN)) return 0;
 725
 726         /*
 727          *      Normal proxying calls us with the data already
 728          *      encoded.  The "ping home server" code does not.  So,
 729          *      if there's no packet, encode it here.
 730          */
 731         if (!request->proxy->data) {
 732                 request->proxy_listener->encode(request->proxy_listener,
 733                                                 request);
 734         }
 735
 736         if (!sock->ssn->connected) {
 737                 PTHREAD_MUTEX_LOCK(&sock->mutex);
 738                 rcode = try_connect(sock->ssn);
 739                 PTHREAD_MUTEX_LOCK(&sock->mutex);
 740                 if (rcode == 0) return 0;
 741
 742                 if (rcode < 0) {
 743                         SSL_shutdown(sock->ssn->ssl);
 744                         return -1;
 745                 }
 746
 747                 sock->ssn->connected = true;
 748         }
 749
 750         DEBUG3("Proxy is writing %u bytes to SSL",
 751                (unsigned int) request->proxy->data_len);
 752         PTHREAD_MUTEX_LOCK(&sock->mutex);
 753         rcode = SSL_write(sock->ssn->ssl, request->proxy->data,
 754                           request->proxy->data_len);
 755         if (rcode < 0) {
 756                 int err;
 757
 758                 err = ERR_get_error();
 759                 switch (err) {
 760                 case SSL_ERROR_NONE:
 761                 case SSL_ERROR_WANT_READ:
 762                 case SSL_ERROR_WANT_WRITE:
 763                         break;  /* let someone else retry */
 764
 765                 default:
 766                         tls_error_log(NULL, "Failed in proxy send");
 767                         DEBUG("Closing TLS socket to home server");
 768                         tls_socket_close(listener);
 769                         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 770                         return 0;
 771                 }
 772         }
 773         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 774
 775         return 1;
 776 }
 777 #endif  /* WITH_PROXY */
 778
 779 #endif  /* WITH_TLS */
 780 #endif  /* WITH_TCP */