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