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