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 = "<core>";
 161                 request->component = "<tls-connect>";
 162
 163                 request->reply = rad_alloc(request, false);
 164                 if (!request->reply) return 0;
 165
 166                 rad_assert(sock->ssn == NULL);
 167
 168                 sock->ssn = tls_new_session(sock, listener->tls, sock->request,
 169                                             listener->tls->require_client_cert);
 170                 if (!sock->ssn) {
 171                         TALLOC_FREE(sock->request);
 172                         sock->packet = NULL;
 173                         return 0;
 174                 }
 175
 176                 SSL_set_ex_data(sock->ssn->ssl, FR_TLS_EX_INDEX_REQUEST, (void *)request);
 177                 SSL_set_ex_data(sock->ssn->ssl, fr_tls_ex_index_certs, (void *) &sock->certs);
 178                 SSL_set_ex_data(sock->ssn->ssl, FR_TLS_EX_INDEX_TALLOC, sock->parent);
 179
 180                 doing_init = true;
 181         }
 182
 183         rad_assert(sock->request != NULL);
 184         rad_assert(sock->request->packet != NULL);
 185         rad_assert(sock->packet != NULL);
 186         rad_assert(sock->ssn != NULL);
 187
 188         request = sock->request;
 189
 190         RDEBUG3("Reading from socket %d", request->packet->sockfd);
 191         PTHREAD_MUTEX_LOCK(&sock->mutex);
 192         rcode = read(request->packet->sockfd,
 193                      sock->ssn->dirty_in.data,
 194                      sizeof(sock->ssn->dirty_in.data));
 195         if ((rcode < 0) && (errno == ECONNRESET)) {
 196         do_close:
 197                 DEBUG("Closing TLS socket from client port %u", sock->other_port);
 198                 tls_socket_close(listener);
 199                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 200                 return 0;
 201         }
 202
 203         if (rcode < 0) {
 204                 RDEBUG("Error reading TLS socket: %s", fr_syserror(errno));
 205                 goto do_close;
 206         }
 207
 208         /*
 209          *      Normal socket close.
 210          */
 211         if (rcode == 0) goto do_close;
 212
 213         sock->ssn->dirty_in.used = rcode;
 214
 215         dump_hex("READ FROM SSL", sock->ssn->dirty_in.data, sock->ssn->dirty_in.used);
 216
 217         /*
 218          *      Catch attempts to use non-SSL.
 219          */
 220         if (doing_init && (sock->ssn->dirty_in.data[0] != handshake)) {
 221                 RDEBUG("Non-TLS data sent to TLS socket: closing");
 222                 goto do_close;
 223         }
 224
 225         /*
 226          *      If we need to do more initialization, do that here.
 227          */
 228         if (!SSL_is_init_finished(sock->ssn->ssl)) {
 229                 if (!tls_handshake_recv(request, sock->ssn)) {
 230                         RDEBUG("FAILED in TLS handshake receive");
 231                         goto do_close;
 232                 }
 233
 234                 /*
 235                  *      More ACK data to send.  Do so.
 236                  */
 237                 if (sock->ssn->dirty_out.used > 0) {
 238                         tls_socket_write(listener, request);
 239                         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 240                         return 0;
 241                 }
 242
 243                 /*
 244                  *      FIXME: Run the request through a virtual
 245                  *      server in order to see if we like the
 246                  *      certificate presented by the client.
 247                  */
 248         }
 249
 250         /*
 251          *      Try to get application data.
 252          */
 253         status = tls_application_data(sock->ssn, request);
 254         RDEBUG("Application data status %d", status);
 255
 256         if (status == FR_TLS_MORE_FRAGMENTS) {
 257                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 258                 return 0;
 259         }
 260
 261         if (sock->ssn->clean_out.used == 0) {
 262                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 263                 return 0;
 264         }
 265
 266         /*
 267          *      We now have a bunch of application data.
 268          */
 269         dump_hex("TUNNELED DATA > ", sock->ssn->clean_out.data, sock->ssn->clean_out.used);
 270
 271         /*
 272          *      If the packet is a complete RADIUS packet, return it to
 273          *      the caller.  Otherwise...
 274          */
 275         if ((sock->ssn->clean_out.used < 20) ||
 276             (((sock->ssn->clean_out.data[2] << 8) | sock->ssn->clean_out.data[3]) != (int) sock->ssn->clean_out.used)) {
 277                 RDEBUG("Received bad packet: Length %zd contents %d",
 278                        sock->ssn->clean_out.used,
 279                        (sock->ssn->clean_out.data[2] << 8) | sock->ssn->clean_out.data[3]);
 280                 goto do_close;
 281         }
 282
 283         packet = sock->packet;
 284         packet->data = talloc_array(packet, uint8_t, sock->ssn->clean_out.used);
 285         packet->data_len = sock->ssn->clean_out.used;
 286         sock->ssn->record_minus(&sock->ssn->clean_out, packet->data, packet->data_len);
 287         packet->vps = NULL;
 288         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 289
 290         if (!rad_packet_ok(packet, 0, NULL)) {
 291                 if (DEBUG_ENABLED) ERROR("Receive - %s", fr_strerror());
 292                 DEBUG("Closing TLS socket from client");
 293                 PTHREAD_MUTEX_LOCK(&sock->mutex);
 294                 tls_socket_close(listener);
 295                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 296                 return 0;       /* do_close unlocks the mutex */
 297         }
 298
 299         /*
 300          *      Copied from src/lib/radius.c, rad_recv();
 301          */
 302         if (fr_debug_lvl) {
 303                 char host_ipaddr[128];
 304
 305                 if (is_radius_code(packet->code)) {
 306                         RDEBUG("tls_recv: %s packet from host %s port %d, id=%d, length=%d",
 307                                fr_packet_codes[packet->code],
 308                                inet_ntop(packet->src_ipaddr.af,
 309                                          &packet->src_ipaddr.ipaddr,
 310                                          host_ipaddr, sizeof(host_ipaddr)),
 311                                packet->src_port,
 312                                packet->id, (int) packet->data_len);
 313                 } else {
 314                         RDEBUG("tls_recv: Packet from host %s port %d code=%d, id=%d, length=%d",
 315                                inet_ntop(packet->src_ipaddr.af,
 316                                          &packet->src_ipaddr.ipaddr,
 317                                          host_ipaddr, sizeof(host_ipaddr)),
 318                                packet->src_port,
 319                                packet->code,
 320                                packet->id, (int) packet->data_len);
 321                 }
 322         }
 323
 324         FR_STATS_INC(auth, total_requests);
 325
 326         /*
 327          *      Re-parent the packet to nothing.
 328          */
 329         (void) talloc_steal(NULL, packet);
 330
 331         return 1;
 332 }
 333
 334
 335 int dual_tls_recv(rad_listen_t *listener)
 336 {
 337         RADIUS_PACKET *packet;
 338         RAD_REQUEST_FUNP fun = NULL;
 339         listen_socket_t *sock = listener->data;
 340         RADCLIENT       *client = sock->client;
 341
 342         if (listener->status != RAD_LISTEN_STATUS_KNOWN) return 0;
 343
 344         if (!tls_socket_recv(listener)) {
 345                 return 0;
 346         }
 347
 348         rad_assert(sock->packet != NULL);
 349         rad_assert(sock->ssn != NULL);
 350         rad_assert(client != NULL);
 351
 352         packet = talloc_steal(NULL, sock->packet);
 353         sock->packet = NULL;
 354
 355         /*
 356          *      Some sanity checks, based on the packet code.
 357          *
 358          *      "auth+acct" are marked as "auth", with the "dual" flag
 359          *      set.
 360          */
 361         switch (packet->code) {
 362         case PW_CODE_ACCESS_REQUEST:
 363                 if (listener->type != RAD_LISTEN_AUTH) goto bad_packet;
 364                 FR_STATS_INC(auth, total_requests);
 365                 fun = rad_authenticate;
 366                 break;
 367
 368 #ifdef WITH_ACCOUNTING
 369         case PW_CODE_ACCOUNTING_REQUEST:
 370                 if (listener->type != RAD_LISTEN_ACCT) {
 371                         /*
 372                          *      Allow auth + dual.  Disallow
 373                          *      everything else.
 374                          */
 375                         if (!((listener->type == RAD_LISTEN_AUTH) &&
 376                               (listener->dual))) {
 377                                     goto bad_packet;
 378                         }
 379                 }
 380                 FR_STATS_INC(acct, total_requests);
 381                 fun = rad_accounting;
 382                 break;
 383 #endif
 384
 385         case PW_CODE_STATUS_SERVER:
 386                 if (!main_config.status_server) {
 387                         FR_STATS_INC(auth, total_unknown_types);
 388                         WARN("Ignoring Status-Server request due to security configuration");
 389                         rad_free(&packet);
 390                         return 0;
 391                 }
 392                 fun = rad_status_server;
 393                 break;
 394
 395         default:
 396         bad_packet:
 397                 FR_STATS_INC(auth, total_unknown_types);
 398
 399                 DEBUG("Invalid packet code %d sent from client %s port %d : IGNORED",
 400                       packet->code, client->shortname, packet->src_port);
 401                 rad_free(&packet);
 402                 return 0;
 403         } /* switch over packet types */
 404
 405         if (!request_receive(NULL, listener, packet, client, fun)) {
 406                 FR_STATS_INC(auth, total_packets_dropped);
 407                 rad_free(&packet);
 408                 return 0;
 409         }
 410
 411         return 1;
 412 }
 413
 414
 415 /*
 416  *      Send a response packet
 417  */
 418 int dual_tls_send(rad_listen_t *listener, REQUEST *request)
 419 {
 420         listen_socket_t *sock = listener->data;
 421
 422         VERIFY_REQUEST(request);
 423
 424         rad_assert(request->listener == listener);
 425         rad_assert(listener->send == dual_tls_send);
 426
 427         if (listener->status != RAD_LISTEN_STATUS_KNOWN) return 0;
 428
 429         /*
 430          *      Accounting reject's are silently dropped.
 431          *
 432          *      We do it here to avoid polluting the rest of the
 433          *      code with this knowledge
 434          */
 435         if (request->reply->code == 0) return 0;
 436
 437         /*
 438          *      Pack the VPs
 439          */
 440         if (rad_encode(request->reply, request->packet,
 441                        request->client->secret) < 0) {
 442                 RERROR("Failed encoding packet: %s", fr_strerror());
 443                 return 0;
 444         }
 445
 446         if (request->reply->data_len > (MAX_PACKET_LEN - 100)) {
 447                 RWARN("Packet is large, and possibly truncated - %zd vs max %d",
 448                       request->reply->data_len, MAX_PACKET_LEN);
 449         }
 450
 451         /*
 452          *      Sign the packet.
 453          */
 454         if (rad_sign(request->reply, request->packet,
 455                        request->client->secret) < 0) {
 456                 RERROR("Failed signing packet: %s", fr_strerror());
 457                 return 0;
 458         }
 459
 460         PTHREAD_MUTEX_LOCK(&sock->mutex);
 461
 462         /*
 463          *      Write the packet to the SSL buffers.
 464          */
 465         sock->ssn->record_plus(&sock->ssn->clean_in,
 466                                request->reply->data, request->reply->data_len);
 467
 468         dump_hex("TUNNELED DATA < ", sock->ssn->clean_in.data, sock->ssn->clean_in.used);
 469
 470         /*
 471          *      Do SSL magic to get encrypted data.
 472          */
 473         tls_handshake_send(request, sock->ssn);
 474
 475         /*
 476          *      And finally write the data to the socket.
 477          */
 478         if (sock->ssn->dirty_out.used > 0) {
 479                 dump_hex("WRITE TO SSL", sock->ssn->dirty_out.data, sock->ssn->dirty_out.used);
 480
 481                 tls_socket_write(listener, request);
 482         }
 483         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 484
 485         return 0;
 486 }
 487
 488
 489 #ifdef WITH_PROXY
 490 /*
 491  *      Read from the SSL socket.  Safe with either blocking or
 492  *      non-blocking IO.  This level of complexity is probably not
 493  *      necessary, as each packet gets put into one SSL application
 494  *      record.  When SSL has a full record, we should be able to read
 495  *      the entire packet via one SSL_read().
 496  *
 497  *      When SSL has a partial record, SSL_read() will return
 498  *      WANT_READ or WANT_WRITE, and zero application data.
 499  *
 500  *      Called with the mutex held.
 501  */
 502 static ssize_t proxy_tls_read(rad_listen_t *listener)
 503 {
 504         int rcode;
 505         size_t length;
 506         uint8_t *data;
 507         listen_socket_t *sock = listener->data;
 508
 509         /*
 510          *      Get the maximum size of data to receive.
 511          */
 512         if (!sock->data) sock->data = talloc_array(sock, uint8_t,
 513                                                    sock->ssn->mtu);
 514
 515         data = sock->data;
 516
 517         if (sock->partial < 4) {
 518                 rcode = SSL_read(sock->ssn->ssl, data + sock->partial,
 519                                  4 - sock->partial);
 520                 if (rcode <= 0) {
 521                         int err = SSL_get_error(sock->ssn->ssl, rcode);
 522                         switch (err) {
 523                         case SSL_ERROR_WANT_READ:
 524                         case SSL_ERROR_WANT_WRITE:
 525                                 return 0; /* do some more work later */
 526
 527                         case SSL_ERROR_ZERO_RETURN:
 528                                 /* remote end sent close_notify, send one back */
 529                                 SSL_shutdown(sock->ssn->ssl);
 530
 531                         case SSL_ERROR_SYSCALL:
 532                         do_close:
 533                                 return -1;
 534
 535                         default:
 536                                 tls_error_log(NULL, "Failed in proxy receive");
 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->mtu) {
 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                         tls_error_log(NULL, "Failed in proxy send");
 719                         DEBUG("Closing TLS socket to home server");
 720                         tls_socket_close(listener);
 721                         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 722                         return 0;
 723                 }
 724         }
 725         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
 726
 727         return 1;
 728 }
 729 #endif  /* WITH_PROXY */
 730
 731 #endif  /* WITH_TLS */
 732 #endif  /* WITH_TCP */