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