main/tcptls.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 2007 - 2008, Digium, Inc.
   5  *
   6  * Luigi Rizzo (TCP and TLS server code)
   7  * Brett Bryant <brettbryant@gmail.com> (updated for client support)
   8  *
   9  * See http://www.asterisk.org for more information about
  10  * the Asterisk project. Please do not directly contact
  11  * any of the maintainers of this project for assistance;
  12  * the project provides a web site, mailing lists and IRC
  13  * channels for your use.
  14  *
  15  * This program is free software, distributed under the terms of
  16  * the GNU General Public License Version 2. See the LICENSE file
  17  * at the top of the source tree.
  18  */
  19
  20 /*!
  21  * \file
  22  * \brief Code to support TCP and TLS server/client
  23  *
  24  * \author Luigi Rizzo
  25  * \author Brett Bryant <brettbryant@gmail.com>
  26  */
  27
  28 #include "asterisk.h"
  29
  30 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  31
  32 #ifdef HAVE_FCNTL_H
  33 #include <fcntl.h>
  34 #endif
  35
  36 #include <signal.h>
  37 #include <sys/signal.h>
  38
  39 #include "asterisk/compat.h"
  40 #include "asterisk/tcptls.h"
  41 #include "asterisk/http.h"
  42 #include "asterisk/utils.h"
  43 #include "asterisk/strings.h"
  44 #include "asterisk/options.h"
  45 #include "asterisk/manager.h"
  46 #include "asterisk/astobj2.h"
  47
  48 /*! \brief
  49  * replacement read/write functions for SSL support.
  50  * We use wrappers rather than SSL_read/SSL_write directly so
  51  * we can put in some debugging.
  52  */
  53
  54 #ifdef DO_SSL
  55 static HOOK_T ssl_read(void *cookie, char *buf, LEN_T len)
  56 {
  57         int i = SSL_read(cookie, buf, len-1);
  58 #if 0
  59         if (i >= 0) {
  60                 buf[i] = '\0';
  61         }
  62         ast_verb(0, "ssl read size %d returns %d <%s>\n", (int)len, i, buf);
  63 #endif
  64         return i;
  65 }
  66
  67 static HOOK_T ssl_write(void *cookie, const char *buf, LEN_T len)
  68 {
  69 #if 0
  70         char *s = alloca(len+1);
  71
  72         strncpy(s, buf, len);
  73         s[len] = '\0';
  74         ast_verb(0, "ssl write size %d <%s>\n", (int)len, s);
  75 #endif
  76         return SSL_write(cookie, buf, len);
  77 }
  78
  79 static int ssl_close(void *cookie)
  80 {
  81         int cookie_fd = SSL_get_fd(cookie);
  82         int ret;
  83         if (cookie_fd > -1) {
  84                 /*
  85                  * According to the TLS standard, it is acceptable for an application to only send its shutdown
  86                  * alert and then close the underlying connection without waiting for the peer's response (this
  87                  * way resources can be saved, as the process can already terminate or serve another connection).
  88                  */
  89                 if ((ret = SSL_shutdown(cookie)) < 0) {
  90                         ast_log(LOG_ERROR, "SSL_shutdown() failed: %d\n", SSL_get_error(cookie, ret));
  91                 }
  92                 SSL_free(cookie);
  93                 /* adding shutdown(2) here has no added benefit */
  94                 if (close(cookie_fd)) {
  95                         ast_log(LOG_ERROR, "close() failed: %s\n", strerror(errno));
  96                 }
  97         }
  98         return 0;
  99 }
 100 #endif  /* DO_SSL */
 101
 102 HOOK_T ast_tcptls_server_read(struct ast_tcptls_session_instance *tcptls_session, void *buf, size_t count)
 103 {
 104         if (tcptls_session->fd == -1) {
 105                 ast_log(LOG_ERROR, "server_read called with an fd of -1\n");
 106                 errno = EIO;
 107                 return -1;
 108         }
 109
 110 #ifdef DO_SSL
 111         if (tcptls_session->ssl) {
 112                 return ssl_read(tcptls_session->ssl, buf, count);
 113         }
 114 #endif
 115         return read(tcptls_session->fd, buf, count);
 116 }
 117
 118 HOOK_T ast_tcptls_server_write(struct ast_tcptls_session_instance *tcptls_session, const void *buf, size_t count)
 119 {
 120         if (tcptls_session->fd == -1) {
 121                 ast_log(LOG_ERROR, "server_write called with an fd of -1\n");
 122                 errno = EIO;
 123                 return -1;
 124         }
 125
 126 #ifdef DO_SSL
 127         if (tcptls_session->ssl) {
 128                 return ssl_write(tcptls_session->ssl, buf, count);
 129         }
 130 #endif
 131         return write(tcptls_session->fd, buf, count);
 132 }
 133
 134 static void session_instance_destructor(void *obj)
 135 {
 136         struct ast_tcptls_session_instance *i = obj;
 137         if (i->parent && i->parent->tls_cfg) {
 138                 ast_ssl_teardown(i->parent->tls_cfg);
 139         }
 140 }
 141
 142 /*! \brief
 143 * creates a FILE * from the fd passed by the accept thread.
 144 * This operation is potentially expensive (certificate verification),
 145 * so we do it in the child thread context.
 146 *
 147 * \note must decrement ref count before returning NULL on error
 148 */
 149 static void *handle_tcptls_connection(void *data)
 150 {
 151         struct ast_tcptls_session_instance *tcptls_session = data;
 152 #ifdef DO_SSL
 153         int (*ssl_setup)(SSL *) = (tcptls_session->client) ? SSL_connect : SSL_accept;
 154         int ret;
 155         char err[256];
 156 #endif
 157
 158         /*
 159         * open a FILE * as appropriate.
 160         */
 161         if (!tcptls_session->parent->tls_cfg) {
 162                 if ((tcptls_session->f = fdopen(tcptls_session->fd, "w+"))) {
 163                         if(setvbuf(tcptls_session->f, NULL, _IONBF, 0)) {
 164                                 ast_tcptls_close_session_file(tcptls_session);
 165                         }
 166                 }
 167         }
 168 #ifdef DO_SSL
 169         else if ( (tcptls_session->ssl = SSL_new(tcptls_session->parent->tls_cfg->ssl_ctx)) ) {
 170                 SSL_set_fd(tcptls_session->ssl, tcptls_session->fd);
 171                 if ((ret = ssl_setup(tcptls_session->ssl)) <= 0) {
 172                         ast_verb(2, "Problem setting up ssl connection: %s\n", ERR_error_string(ERR_get_error(), err));
 173                 } else {
 174 #if defined(HAVE_FUNOPEN)       /* the BSD interface */
 175                         tcptls_session->f = funopen(tcptls_session->ssl, ssl_read, ssl_write, NULL, ssl_close);
 176
 177 #elif defined(HAVE_FOPENCOOKIE) /* the glibc/linux interface */
 178                         static const cookie_io_functions_t cookie_funcs = {
 179                                 ssl_read, ssl_write, NULL, ssl_close
 180                         };
 181                         tcptls_session->f = fopencookie(tcptls_session->ssl, "w+", cookie_funcs);
 182 #else
 183                         /* could add other methods here */
 184                         ast_debug(2, "no tcptls_session->f methods attempted!\n");
 185 #endif
 186                         if ((tcptls_session->client && !ast_test_flag(&tcptls_session->parent->tls_cfg->flags, AST_SSL_DONT_VERIFY_SERVER))
 187                                 || (!tcptls_session->client && ast_test_flag(&tcptls_session->parent->tls_cfg->flags, AST_SSL_VERIFY_CLIENT))) {
 188                                 X509 *peer;
 189                                 long res;
 190                                 peer = SSL_get_peer_certificate(tcptls_session->ssl);
 191                                 if (!peer) {
 192                                         ast_log(LOG_WARNING, "No peer SSL certificate\n");
 193                                 }
 194                                 res = SSL_get_verify_result(tcptls_session->ssl);
 195                                 if (res != X509_V_OK) {
 196                                         ast_log(LOG_ERROR, "Certificate did not verify: %s\n", X509_verify_cert_error_string(res));
 197                                 }
 198                                 if (!ast_test_flag(&tcptls_session->parent->tls_cfg->flags, AST_SSL_IGNORE_COMMON_NAME)) {
 199                                         ASN1_STRING *str;
 200                                         unsigned char *str2;
 201                                         X509_NAME *name = X509_get_subject_name(peer);
 202                                         int pos = -1;
 203                                         int found = 0;
 204
 205                                         for (;;) {
 206                                                 /* Walk the certificate to check all available "Common Name" */
 207                                                 /* XXX Probably should do a gethostbyname on the hostname and compare that as well */
 208                                                 pos = X509_NAME_get_index_by_NID(name, NID_commonName, pos);
 209                                                 if (pos < 0) {
 210                                                         break;
 211                                                 }
 212                                                 str = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(name, pos));
 213                                                 ASN1_STRING_to_UTF8(&str2, str);
 214                                                 if (str2) {
 215                                                         if (!strcasecmp(tcptls_session->parent->hostname, (char *) str2)) {
 216                                                                 found = 1;
 217                                                         }
 218                                                         ast_debug(3, "SSL Common Name compare s1='%s' s2='%s'\n", tcptls_session->parent->hostname, str2);
 219                                                         OPENSSL_free(str2);
 220                                                 }
 221                                                 if (found) {
 222                                                         break;
 223                                                 }
 224                                         }
 225                                         if (!found) {
 226                                                 ast_log(LOG_ERROR, "Certificate common name did not match (%s)\n", tcptls_session->parent->hostname);
 227                                                 if (peer) {
 228                                                         X509_free(peer);
 229                                                 }
 230                                                 ast_tcptls_close_session_file(tcptls_session);
 231                                                 ao2_ref(tcptls_session, -1);
 232                                                 return NULL;
 233                                         }
 234                                 }
 235                                 if (peer) {
 236                                         X509_free(peer);
 237                                 }
 238                         }
 239                 }
 240                 if (!tcptls_session->f) {       /* no success opening descriptor stacking */
 241                         SSL_free(tcptls_session->ssl);
 242                 }
 243         }
 244 #endif /* DO_SSL */
 245
 246         if (!tcptls_session->f) {
 247                 ast_tcptls_close_session_file(tcptls_session);
 248                 ast_log(LOG_WARNING, "FILE * open failed!\n");
 249 #ifndef DO_SSL
 250                 if (tcptls_session->parent->tls_cfg) {
 251                         ast_log(LOG_WARNING, "Attempted a TLS connection without OpenSSL support. This will not work!\n");
 252                 }
 253 #endif
 254                 ao2_ref(tcptls_session, -1);
 255                 return NULL;
 256         }
 257
 258         if (tcptls_session && tcptls_session->parent->worker_fn) {
 259                 return tcptls_session->parent->worker_fn(tcptls_session);
 260         } else {
 261                 return tcptls_session;
 262         }
 263 }
 264
 265 void *ast_tcptls_server_root(void *data)
 266 {
 267         struct ast_tcptls_session_args *desc = data;
 268         int fd;
 269         struct ast_sockaddr addr;
 270         struct ast_tcptls_session_instance *tcptls_session;
 271         pthread_t launched;
 272
 273         for (;;) {
 274                 int i, flags;
 275
 276                 if (desc->periodic_fn) {
 277                         desc->periodic_fn(desc);
 278                 }
 279                 i = ast_wait_for_input(desc->accept_fd, desc->poll_timeout);
 280                 if (i <= 0) {
 281                         continue;
 282                 }
 283                 fd = ast_accept(desc->accept_fd, &addr);
 284                 if (fd < 0) {
 285                         if ((errno != EAGAIN) && (errno != EINTR)) {
 286                                 ast_log(LOG_WARNING, "Accept failed: %s\n", strerror(errno));
 287                         }
 288                         continue;
 289                 }
 290                 tcptls_session = ao2_alloc(sizeof(*tcptls_session), session_instance_destructor);
 291                 if (!tcptls_session) {
 292                         ast_log(LOG_WARNING, "No memory for new session: %s\n", strerror(errno));
 293                         if (close(fd)) {
 294                                 ast_log(LOG_ERROR, "close() failed: %s\n", strerror(errno));
 295                         }
 296                         continue;
 297                 }
 298
 299                 flags = fcntl(fd, F_GETFL);
 300                 fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
 301                 tcptls_session->fd = fd;
 302                 tcptls_session->parent = desc;
 303                 ast_sockaddr_copy(&tcptls_session->remote_address, &addr);
 304
 305                 tcptls_session->client = 0;
 306
 307                 /* This thread is now the only place that controls the single ref to tcptls_session */
 308                 if (ast_pthread_create_detached_background(&launched, NULL, handle_tcptls_connection, tcptls_session)) {
 309                         ast_log(LOG_WARNING, "Unable to launch helper thread: %s\n", strerror(errno));
 310                         ast_tcptls_close_session_file(tcptls_session);
 311                         ao2_ref(tcptls_session, -1);
 312                 }
 313         }
 314         return NULL;
 315 }
 316
 317 static int __ssl_setup(struct ast_tls_config *cfg, int client)
 318 {
 319 #ifndef DO_SSL
 320         cfg->enabled = 0;
 321         return 0;
 322 #else
 323         if (!cfg->enabled) {
 324                 return 0;
 325         }
 326
 327         SSL_load_error_strings();
 328         SSLeay_add_ssl_algorithms();
 329
 330         /* Get rid of an old SSL_CTX since we're about to
 331          * allocate a new one
 332          */
 333         if (cfg->ssl_ctx) {
 334                 SSL_CTX_free(cfg->ssl_ctx);
 335                 cfg->ssl_ctx = NULL;
 336         }
 337
 338         if (client) {
 339 #ifndef OPENSSL_NO_SSL2
 340                 if (ast_test_flag(&cfg->flags, AST_SSL_SSLV2_CLIENT)) {
 341                         cfg->ssl_ctx = SSL_CTX_new(SSLv2_client_method());
 342                 } else
 343 #endif
 344                 if (ast_test_flag(&cfg->flags, AST_SSL_SSLV3_CLIENT)) {
 345                         cfg->ssl_ctx = SSL_CTX_new(SSLv3_client_method());
 346                 } else if (ast_test_flag(&cfg->flags, AST_SSL_TLSV1_CLIENT)) {
 347                         cfg->ssl_ctx = SSL_CTX_new(TLSv1_client_method());
 348                 } else {
 349                         /* SSLv23_client_method() sends SSLv2, this was the original
 350                          * default for ssl clients before the option was given to
 351                          * pick what protocol a client should use.  In order not
 352                          * to break expected behavior it remains the default. */
 353                         cfg->ssl_ctx = SSL_CTX_new(SSLv23_client_method());
 354                 }
 355         } else {
 356                 /* SSLv23_server_method() supports TLSv1, SSLv2, and SSLv3 inbound connections. */
 357                 cfg->ssl_ctx = SSL_CTX_new(SSLv23_server_method());
 358         }
 359
 360         if (!cfg->ssl_ctx) {
 361                 ast_debug(1, "Sorry, SSL_CTX_new call returned null...\n");
 362                 cfg->enabled = 0;
 363                 return 0;
 364         }
 365         if (!ast_strlen_zero(cfg->certfile)) {
 366                 char *tmpprivate = ast_strlen_zero(cfg->pvtfile) ? cfg->certfile : cfg->pvtfile;
 367                 if (SSL_CTX_use_certificate_file(cfg->ssl_ctx, cfg->certfile, SSL_FILETYPE_PEM) == 0) {
 368                         if (!client) {
 369                                 /* Clients don't need a certificate, but if its setup we can use it */
 370                                 ast_verb(0, "SSL error loading cert file. <%s>\n", cfg->certfile);
 371                                 sleep(2);
 372                                 cfg->enabled = 0;
 373                                 SSL_CTX_free(cfg->ssl_ctx);
 374                                 cfg->ssl_ctx = NULL;
 375                                 return 0;
 376                         }
 377                 }
 378                 if ((SSL_CTX_use_PrivateKey_file(cfg->ssl_ctx, tmpprivate, SSL_FILETYPE_PEM) == 0) || (SSL_CTX_check_private_key(cfg->ssl_ctx) == 0 )) {
 379                         if (!client) {
 380                                 /* Clients don't need a private key, but if its setup we can use it */
 381                                 ast_verb(0, "SSL error loading private key file. <%s>\n", tmpprivate);
 382                                 sleep(2);
 383                                 cfg->enabled = 0;
 384                                 SSL_CTX_free(cfg->ssl_ctx);
 385                                 cfg->ssl_ctx = NULL;
 386                                 return 0;
 387                         }
 388                 }
 389         }
 390         if (!ast_strlen_zero(cfg->cipher)) {
 391                 if (SSL_CTX_set_cipher_list(cfg->ssl_ctx, cfg->cipher) == 0 ) {
 392                         if (!client) {
 393                                 ast_verb(0, "SSL cipher error <%s>\n", cfg->cipher);
 394                                 sleep(2);
 395                                 cfg->enabled = 0;
 396                                 SSL_CTX_free(cfg->ssl_ctx);
 397                                 cfg->ssl_ctx = NULL;
 398                                 return 0;
 399                         }
 400                 }
 401         }
 402         if (!ast_strlen_zero(cfg->cafile) || !ast_strlen_zero(cfg->capath)) {
 403                 if (SSL_CTX_load_verify_locations(cfg->ssl_ctx, S_OR(cfg->cafile, NULL), S_OR(cfg->capath,NULL)) == 0) {
 404                         ast_verb(0, "SSL CA file(%s)/path(%s) error\n", cfg->cafile, cfg->capath);
 405                 }
 406         }
 407
 408         ast_verb(0, "SSL certificate ok\n");
 409         return 1;
 410 #endif
 411 }
 412
 413 int ast_ssl_setup(struct ast_tls_config *cfg)
 414 {
 415         return __ssl_setup(cfg, 0);
 416 }
 417
 418 void ast_ssl_teardown(struct ast_tls_config *cfg)
 419 {
 420 #ifdef DO_SSL
 421         if (cfg->ssl_ctx) {
 422                 SSL_CTX_free(cfg->ssl_ctx);
 423                 cfg->ssl_ctx = NULL;
 424         }
 425 #endif
 426 }
 427
 428 struct ast_tcptls_session_instance *ast_tcptls_client_start(struct ast_tcptls_session_instance *tcptls_session)
 429 {
 430         struct ast_tcptls_session_args *desc;
 431         int flags;
 432
 433         if (!(desc = tcptls_session->parent)) {
 434                 goto client_start_error;
 435         }
 436
 437         if (ast_connect(desc->accept_fd, &desc->remote_address)) {
 438                 ast_log(LOG_ERROR, "Unable to connect %s to %s: %s\n",
 439                         desc->name,
 440                         ast_sockaddr_stringify(&desc->remote_address),
 441                         strerror(errno));
 442                 goto client_start_error;
 443         }
 444
 445         flags = fcntl(desc->accept_fd, F_GETFL);
 446         fcntl(desc->accept_fd, F_SETFL, flags & ~O_NONBLOCK);
 447
 448         if (desc->tls_cfg) {
 449                 desc->tls_cfg->enabled = 1;
 450                 __ssl_setup(desc->tls_cfg, 1);
 451         }
 452
 453         return handle_tcptls_connection(tcptls_session);
 454
 455 client_start_error:
 456         if (desc) {
 457                 close(desc->accept_fd);
 458                 desc->accept_fd = -1;
 459         }
 460         if (tcptls_session) {
 461                 ao2_ref(tcptls_session, -1);
 462         }
 463         return NULL;
 464
 465 }
 466
 467 struct ast_tcptls_session_instance *ast_tcptls_client_create(struct ast_tcptls_session_args *desc)
 468 {
 469         int x = 1;
 470         struct ast_tcptls_session_instance *tcptls_session = NULL;
 471
 472         /* Do nothing if nothing has changed */
 473         if (!ast_sockaddr_cmp(&desc->old_address, &desc->remote_address)) {
 474                 ast_debug(1, "Nothing changed in %s\n", desc->name);
 475                 return NULL;
 476         }
 477
 478         /* If we return early, there is no connection */
 479         ast_sockaddr_setnull(&desc->old_address);
 480
 481         if (desc->accept_fd != -1) {
 482                 close(desc->accept_fd);
 483         }
 484
 485         desc->accept_fd = socket(ast_sockaddr_is_ipv6(&desc->remote_address) ?
 486                                  AF_INET6 : AF_INET, SOCK_STREAM, IPPROTO_TCP);
 487         if (desc->accept_fd < 0) {
 488                 ast_log(LOG_WARNING, "Unable to allocate socket for %s: %s\n",
 489                         desc->name, strerror(errno));
 490                 return NULL;
 491         }
 492
 493         /* if a local address was specified, bind to it so the connection will
 494            originate from the desired address */
 495         if (!ast_sockaddr_isnull(&desc->local_address)) {
 496                 setsockopt(desc->accept_fd, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x));
 497                 if (ast_bind(desc->accept_fd, &desc->local_address)) {
 498                         ast_log(LOG_ERROR, "Unable to bind %s to %s: %s\n",
 499                                 desc->name,
 500                                 ast_sockaddr_stringify(&desc->local_address),
 501                                 strerror(errno));
 502                         goto error;
 503                 }
 504         }
 505
 506         if (!(tcptls_session = ao2_alloc(sizeof(*tcptls_session), session_instance_destructor))) {
 507                 goto error;
 508         }
 509
 510         tcptls_session->client = 1;
 511         tcptls_session->fd = desc->accept_fd;
 512         tcptls_session->parent = desc;
 513         tcptls_session->parent->worker_fn = NULL;
 514         ast_sockaddr_copy(&tcptls_session->remote_address,
 515                           &desc->remote_address);
 516
 517         /* Set current info */
 518         ast_sockaddr_copy(&desc->old_address, &desc->remote_address);
 519         return tcptls_session;
 520
 521 error:
 522         close(desc->accept_fd);
 523         desc->accept_fd = -1;
 524         if (tcptls_session) {
 525                 ao2_ref(tcptls_session, -1);
 526         }
 527         return NULL;
 528 }
 529
 530 void ast_tcptls_server_start(struct ast_tcptls_session_args *desc)
 531 {
 532         int flags;
 533         int x = 1;
 534
 535         /* Do nothing if nothing has changed */
 536         if (!ast_sockaddr_cmp(&desc->old_address, &desc->local_address)) {
 537                 ast_debug(1, "Nothing changed in %s\n", desc->name);
 538                 return;
 539         }
 540
 541         /* If we return early, there is no one listening */
 542         ast_sockaddr_setnull(&desc->old_address);
 543
 544         /* Shutdown a running server if there is one */
 545         if (desc->master != AST_PTHREADT_NULL) {
 546                 pthread_cancel(desc->master);
 547                 pthread_kill(desc->master, SIGURG);
 548                 pthread_join(desc->master, NULL);
 549         }
 550
 551         if (desc->accept_fd != -1) {
 552                 close(desc->accept_fd);
 553         }
 554
 555         /* If there's no new server, stop here */
 556         if (ast_sockaddr_isnull(&desc->local_address)) {
 557                 ast_debug(2, "Server disabled:  %s\n", desc->name);
 558                 return;
 559         }
 560
 561         desc->accept_fd = socket(ast_sockaddr_is_ipv6(&desc->local_address) ?
 562                                  AF_INET6 : AF_INET, SOCK_STREAM, 0);
 563         if (desc->accept_fd < 0) {
 564                 ast_log(LOG_ERROR, "Unable to allocate socket for %s: %s\n", desc->name, strerror(errno));
 565                 return;
 566         }
 567
 568         setsockopt(desc->accept_fd, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x));
 569         if (ast_bind(desc->accept_fd, &desc->local_address)) {
 570                 ast_log(LOG_ERROR, "Unable to bind %s to %s: %s\n",
 571                         desc->name,
 572                         ast_sockaddr_stringify(&desc->local_address),
 573                         strerror(errno));
 574                 goto error;
 575         }
 576         if (listen(desc->accept_fd, 10)) {
 577                 ast_log(LOG_ERROR, "Unable to listen for %s!\n", desc->name);
 578                 goto error;
 579         }
 580         flags = fcntl(desc->accept_fd, F_GETFL);
 581         fcntl(desc->accept_fd, F_SETFL, flags | O_NONBLOCK);
 582         if (ast_pthread_create_background(&desc->master, NULL, desc->accept_fn, desc)) {
 583                 ast_log(LOG_ERROR, "Unable to launch thread for %s on %s: %s\n",
 584                         desc->name,
 585                         ast_sockaddr_stringify(&desc->local_address),
 586                         strerror(errno));
 587                 goto error;
 588         }
 589
 590         /* Set current info */
 591         ast_sockaddr_copy(&desc->old_address, &desc->local_address);
 592
 593         return;
 594
 595 error:
 596         close(desc->accept_fd);
 597         desc->accept_fd = -1;
 598 }
 599
 600 void ast_tcptls_close_session_file(struct ast_tcptls_session_instance *tcptls_session)
 601 {
 602         if (tcptls_session->f) {
 603                 if (fclose(tcptls_session->f)) {
 604                         ast_log(LOG_ERROR, "fclose() failed: %s\n", strerror(errno));
 605                 }
 606                 tcptls_session->f = NULL;
 607                 tcptls_session->fd = -1;
 608         } else if (tcptls_session->fd != -1) {
 609                 if (close(tcptls_session->fd)) {
 610                         ast_log(LOG_ERROR, "close() failed: %s\n", strerror(errno));
 611                 }
 612                 tcptls_session->fd = -1;
 613         } else {
 614                 ast_log(LOG_ERROR, "ast_tcptls_close_session_file invoked on session instance without file or file descriptor\n");
 615         }
 616 }
 617
 618 void ast_tcptls_server_stop(struct ast_tcptls_session_args *desc)
 619 {
 620         if (desc->master != AST_PTHREADT_NULL) {
 621                 pthread_cancel(desc->master);
 622                 pthread_kill(desc->master, SIGURG);
 623                 pthread_join(desc->master, NULL);
 624                 desc->master = AST_PTHREADT_NULL;
 625         }
 626         if (desc->accept_fd != -1) {
 627                 close(desc->accept_fd);
 628         }
 629         desc->accept_fd = -1;
 630         ast_debug(2, "Stopped server :: %s\n", desc->name);
 631 }
 632
 633 int ast_tls_read_conf(struct ast_tls_config *tls_cfg, struct ast_tcptls_session_args *tls_desc, const char *varname, const char *value)
 634 {
 635         if (!strcasecmp(varname, "tlsenable") || !strcasecmp(varname, "sslenable")) {
 636                 tls_cfg->enabled = ast_true(value) ? 1 : 0;
 637         } else if (!strcasecmp(varname, "tlscertfile") || !strcasecmp(varname, "sslcert") || !strcasecmp(varname, "tlscert")) {
 638                 ast_free(tls_cfg->certfile);
 639                 tls_cfg->certfile = ast_strdup(value);
 640         } else if (!strcasecmp(varname, "tlsprivatekey") || !strcasecmp(varname, "sslprivatekey")) {
 641                 ast_free(tls_cfg->pvtfile);
 642                 tls_cfg->pvtfile = ast_strdup(value);
 643         } else if (!strcasecmp(varname, "tlscipher") || !strcasecmp(varname, "sslcipher")) {
 644                 ast_free(tls_cfg->cipher);
 645                 tls_cfg->cipher = ast_strdup(value);
 646         } else if (!strcasecmp(varname, "tlscafile")) {
 647                 ast_free(tls_cfg->cafile);
 648                 tls_cfg->cafile = ast_strdup(value);
 649         } else if (!strcasecmp(varname, "tlscapath") || !strcasecmp(varname, "tlscadir")) {
 650                 ast_free(tls_cfg->capath);
 651                 tls_cfg->capath = ast_strdup(value);
 652         } else if (!strcasecmp(varname, "tlsverifyclient")) {
 653                 ast_set2_flag(&tls_cfg->flags, ast_true(value), AST_SSL_VERIFY_CLIENT);
 654         } else if (!strcasecmp(varname, "tlsdontverifyserver")) {
 655                 ast_set2_flag(&tls_cfg->flags, ast_true(value), AST_SSL_DONT_VERIFY_SERVER);
 656         } else if (!strcasecmp(varname, "tlsbindaddr") || !strcasecmp(varname, "sslbindaddr")) {
 657                 if (ast_parse_arg(value, PARSE_ADDR, &tls_desc->local_address))
 658                         ast_log(LOG_WARNING, "Invalid %s '%s'\n", varname, value);
 659         } else if (!strcasecmp(varname, "tlsclientmethod") || !strcasecmp(varname, "sslclientmethod")) {
 660                 if (!strcasecmp(value, "tlsv1")) {
 661                         ast_set_flag(&tls_cfg->flags, AST_SSL_TLSV1_CLIENT);
 662                         ast_clear_flag(&tls_cfg->flags, AST_SSL_SSLV3_CLIENT);
 663                         ast_clear_flag(&tls_cfg->flags, AST_SSL_SSLV2_CLIENT);
 664                 } else if (!strcasecmp(value, "sslv3")) {
 665                         ast_set_flag(&tls_cfg->flags, AST_SSL_SSLV3_CLIENT);
 666                         ast_clear_flag(&tls_cfg->flags, AST_SSL_SSLV2_CLIENT);
 667                         ast_clear_flag(&tls_cfg->flags, AST_SSL_TLSV1_CLIENT);
 668                 } else if (!strcasecmp(value, "sslv2")) {
 669                         ast_set_flag(&tls_cfg->flags, AST_SSL_SSLV2_CLIENT);
 670                         ast_clear_flag(&tls_cfg->flags, AST_SSL_TLSV1_CLIENT);
 671                         ast_clear_flag(&tls_cfg->flags, AST_SSL_SSLV3_CLIENT);
 672                 }
 673         } else {
 674                 return -1;
 675         }
 676
 677         return 0;
 678 }