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00028 #include "asterisk.h"
00029
00030 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 346564 $")
00031
00032 #ifdef HAVE_FCNTL_H
00033 #include <fcntl.h>
00034 #endif
00035
00036 #include <signal.h>
00037 #include <sys/signal.h>
00038
00039 #include "asterisk/compat.h"
00040 #include "asterisk/tcptls.h"
00041 #include "asterisk/http.h"
00042 #include "asterisk/utils.h"
00043 #include "asterisk/strings.h"
00044 #include "asterisk/options.h"
00045 #include "asterisk/manager.h"
00046 #include "asterisk/astobj2.h"
00047
00048
00049
00050
00051
00052
00053
00054 #ifdef DO_SSL
00055 static HOOK_T ssl_read(void *cookie, char *buf, LEN_T len)
00056 {
00057 int i = SSL_read(cookie, buf, len-1);
00058 #if 0
00059 if (i >= 0)
00060 buf[i] = '\0';
00061 ast_verb(0, "ssl read size %d returns %d <%s>\n", (int)len, i, buf);
00062 #endif
00063 return i;
00064 }
00065
00066 static HOOK_T ssl_write(void *cookie, const char *buf, LEN_T len)
00067 {
00068 #if 0
00069 char *s = alloca(len+1);
00070 strncpy(s, buf, len);
00071 s[len] = '\0';
00072 ast_verb(0, "ssl write size %d <%s>\n", (int)len, s);
00073 #endif
00074 return SSL_write(cookie, buf, len);
00075 }
00076
00077 static int ssl_close(void *cookie)
00078 {
00079 int cookie_fd = SSL_get_fd(cookie);
00080 int ret;
00081 if (cookie_fd > -1) {
00082
00083
00084
00085
00086
00087 if ((ret = SSL_shutdown(cookie)) < 0) {
00088 ast_log(LOG_ERROR, "SSL_shutdown() failed: %d\n", SSL_get_error(cookie, ret));
00089 }
00090 SSL_free(cookie);
00091
00092 if (close(cookie_fd)) {
00093 ast_log(LOG_ERROR, "close() failed: %s\n", strerror(errno));
00094 }
00095 }
00096 return 0;
00097 }
00098 #endif
00099
00100 HOOK_T ast_tcptls_server_read(struct ast_tcptls_session_instance *tcptls_session, void *buf, size_t count)
00101 {
00102 if (tcptls_session->fd == -1) {
00103 ast_log(LOG_ERROR, "server_read called with an fd of -1\n");
00104 errno = EIO;
00105 return -1;
00106 }
00107
00108 #ifdef DO_SSL
00109 if (tcptls_session->ssl)
00110 return ssl_read(tcptls_session->ssl, buf, count);
00111 #endif
00112 return read(tcptls_session->fd, buf, count);
00113 }
00114
00115 HOOK_T ast_tcptls_server_write(struct ast_tcptls_session_instance *tcptls_session, const void *buf, size_t count)
00116 {
00117 if (tcptls_session->fd == -1) {
00118 ast_log(LOG_ERROR, "server_write called with an fd of -1\n");
00119 errno = EIO;
00120 return -1;
00121 }
00122
00123 #ifdef DO_SSL
00124 if (tcptls_session->ssl)
00125 return ssl_write(tcptls_session->ssl, buf, count);
00126 #endif
00127 return write(tcptls_session->fd, buf, count);
00128 }
00129
00130 static void session_instance_destructor(void *obj)
00131 {
00132 struct ast_tcptls_session_instance *i = obj;
00133 ast_mutex_destroy(&i->lock);
00134 }
00135
00136
00137
00138
00139
00140
00141
00142
00143 static void *handle_tcptls_connection(void *data)
00144 {
00145 struct ast_tcptls_session_instance *tcptls_session = data;
00146 #ifdef DO_SSL
00147 int (*ssl_setup)(SSL *) = (tcptls_session->client) ? SSL_connect : SSL_accept;
00148 int ret;
00149 char err[256];
00150 #endif
00151
00152
00153
00154
00155 if (!tcptls_session->parent->tls_cfg) {
00156 if ((tcptls_session->f = fdopen(tcptls_session->fd, "w+"))) {
00157 if(setvbuf(tcptls_session->f, NULL, _IONBF, 0)) {
00158 ast_tcptls_close_session_file(tcptls_session);
00159 }
00160 }
00161 }
00162 #ifdef DO_SSL
00163 else if ( (tcptls_session->ssl = SSL_new(tcptls_session->parent->tls_cfg->ssl_ctx)) ) {
00164 SSL_set_fd(tcptls_session->ssl, tcptls_session->fd);
00165 if ((ret = ssl_setup(tcptls_session->ssl)) <= 0) {
00166 ast_verb(2, "Problem setting up ssl connection: %s\n", ERR_error_string(ERR_get_error(), err));
00167 } else {
00168 #if defined(HAVE_FUNOPEN)
00169 tcptls_session->f = funopen(tcptls_session->ssl, ssl_read, ssl_write, NULL, ssl_close);
00170
00171 #elif defined(HAVE_FOPENCOOKIE)
00172 static const cookie_io_functions_t cookie_funcs = {
00173 ssl_read, ssl_write, NULL, ssl_close
00174 };
00175 tcptls_session->f = fopencookie(tcptls_session->ssl, "w+", cookie_funcs);
00176 #else
00177
00178 ast_debug(2, "no tcptls_session->f methods attempted!");
00179 #endif
00180 if ((tcptls_session->client && !ast_test_flag(&tcptls_session->parent->tls_cfg->flags, AST_SSL_DONT_VERIFY_SERVER))
00181 || (!tcptls_session->client && ast_test_flag(&tcptls_session->parent->tls_cfg->flags, AST_SSL_VERIFY_CLIENT))) {
00182 X509 *peer;
00183 long res;
00184 peer = SSL_get_peer_certificate(tcptls_session->ssl);
00185 if (!peer)
00186 ast_log(LOG_WARNING, "No peer SSL certificate\n");
00187 res = SSL_get_verify_result(tcptls_session->ssl);
00188 if (res != X509_V_OK)
00189 ast_log(LOG_ERROR, "Certificate did not verify: %s\n", X509_verify_cert_error_string(res));
00190 if (!ast_test_flag(&tcptls_session->parent->tls_cfg->flags, AST_SSL_IGNORE_COMMON_NAME)) {
00191 ASN1_STRING *str;
00192 unsigned char *str2;
00193 X509_NAME *name = X509_get_subject_name(peer);
00194 int pos = -1;
00195 int found = 0;
00196
00197 for (;;) {
00198
00199
00200 pos = X509_NAME_get_index_by_NID(name, NID_commonName, pos);
00201 if (pos < 0)
00202 break;
00203 str = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(name, pos));
00204 ASN1_STRING_to_UTF8(&str2, str);
00205 if (str2) {
00206 if (!strcasecmp(tcptls_session->parent->hostname, (char *) str2))
00207 found = 1;
00208 ast_debug(3, "SSL Common Name compare s1='%s' s2='%s'\n", tcptls_session->parent->hostname, str2);
00209 OPENSSL_free(str2);
00210 }
00211 if (found)
00212 break;
00213 }
00214 if (!found) {
00215 ast_log(LOG_ERROR, "Certificate common name did not match (%s)\n", tcptls_session->parent->hostname);
00216 if (peer) {
00217 X509_free(peer);
00218 }
00219 ast_tcptls_close_session_file(tcptls_session);
00220 ao2_ref(tcptls_session, -1);
00221 return NULL;
00222 }
00223 }
00224 if (peer)
00225 X509_free(peer);
00226 }
00227 }
00228 if (!tcptls_session->f)
00229 SSL_free(tcptls_session->ssl);
00230 }
00231 #endif
00232
00233 if (!tcptls_session->f) {
00234 ast_tcptls_close_session_file(tcptls_session);
00235 ast_log(LOG_WARNING, "FILE * open failed!\n");
00236 #ifndef DO_SSL
00237 if (tcptls_session->parent->tls_cfg) {
00238 ast_log(LOG_WARNING, "Attempted a TLS connection without OpenSSL support. This will not work!\n");
00239 }
00240 #endif
00241 ao2_ref(tcptls_session, -1);
00242 return NULL;
00243 }
00244
00245 if (tcptls_session && tcptls_session->parent->worker_fn)
00246 return tcptls_session->parent->worker_fn(tcptls_session);
00247 else
00248 return tcptls_session;
00249 }
00250
00251 void *ast_tcptls_server_root(void *data)
00252 {
00253 struct ast_tcptls_session_args *desc = data;
00254 int fd;
00255 struct ast_sockaddr addr;
00256 struct ast_tcptls_session_instance *tcptls_session;
00257 pthread_t launched;
00258
00259 for (;;) {
00260 int i, flags;
00261
00262 if (desc->periodic_fn)
00263 desc->periodic_fn(desc);
00264 i = ast_wait_for_input(desc->accept_fd, desc->poll_timeout);
00265 if (i <= 0)
00266 continue;
00267 fd = ast_accept(desc->accept_fd, &addr);
00268 if (fd < 0) {
00269 if ((errno != EAGAIN) && (errno != EINTR))
00270 ast_log(LOG_WARNING, "Accept failed: %s\n", strerror(errno));
00271 continue;
00272 }
00273 tcptls_session = ao2_alloc(sizeof(*tcptls_session), session_instance_destructor);
00274 if (!tcptls_session) {
00275 ast_log(LOG_WARNING, "No memory for new session: %s\n", strerror(errno));
00276 if (close(fd)) {
00277 ast_log(LOG_ERROR, "close() failed: %s\n", strerror(errno));
00278 }
00279 continue;
00280 }
00281
00282 ast_mutex_init(&tcptls_session->lock);
00283
00284 flags = fcntl(fd, F_GETFL);
00285 fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
00286 tcptls_session->fd = fd;
00287 tcptls_session->parent = desc;
00288 ast_sockaddr_copy(&tcptls_session->remote_address, &addr);
00289
00290 tcptls_session->client = 0;
00291
00292
00293 if (ast_pthread_create_detached_background(&launched, NULL, handle_tcptls_connection, tcptls_session)) {
00294 ast_log(LOG_WARNING, "Unable to launch helper thread: %s\n", strerror(errno));
00295 ast_tcptls_close_session_file(tcptls_session);
00296 ao2_ref(tcptls_session, -1);
00297 }
00298 }
00299 return NULL;
00300 }
00301
00302 static int __ssl_setup(struct ast_tls_config *cfg, int client)
00303 {
00304 #ifndef DO_SSL
00305 cfg->enabled = 0;
00306 return 0;
00307 #else
00308 if (!cfg->enabled)
00309 return 0;
00310
00311 SSL_load_error_strings();
00312 SSLeay_add_ssl_algorithms();
00313
00314 if (client) {
00315 #ifndef OPENSSL_NO_SSL2
00316 if (ast_test_flag(&cfg->flags, AST_SSL_SSLV2_CLIENT)) {
00317 cfg->ssl_ctx = SSL_CTX_new(SSLv2_client_method());
00318 } else
00319 #endif
00320 if (ast_test_flag(&cfg->flags, AST_SSL_SSLV3_CLIENT)) {
00321 cfg->ssl_ctx = SSL_CTX_new(SSLv3_client_method());
00322 } else if (ast_test_flag(&cfg->flags, AST_SSL_TLSV1_CLIENT)) {
00323 cfg->ssl_ctx = SSL_CTX_new(TLSv1_client_method());
00324 } else {
00325
00326
00327
00328
00329 cfg->ssl_ctx = SSL_CTX_new(SSLv23_client_method());
00330 }
00331 } else {
00332
00333 cfg->ssl_ctx = SSL_CTX_new(SSLv23_server_method());
00334 }
00335
00336 if (!cfg->ssl_ctx) {
00337 ast_debug(1, "Sorry, SSL_CTX_new call returned null...\n");
00338 cfg->enabled = 0;
00339 return 0;
00340 }
00341 if (!ast_strlen_zero(cfg->certfile)) {
00342 char *tmpprivate = ast_strlen_zero(cfg->pvtfile) ? cfg->certfile : cfg->pvtfile;
00343 if (SSL_CTX_use_certificate_file(cfg->ssl_ctx, cfg->certfile, SSL_FILETYPE_PEM) == 0) {
00344 if (!client) {
00345
00346 ast_verb(0, "SSL error loading cert file. <%s>", cfg->certfile);
00347 sleep(2);
00348 cfg->enabled = 0;
00349 return 0;
00350 }
00351 }
00352 if ((SSL_CTX_use_PrivateKey_file(cfg->ssl_ctx, tmpprivate, SSL_FILETYPE_PEM) == 0) || (SSL_CTX_check_private_key(cfg->ssl_ctx) == 0 )) {
00353 if (!client) {
00354
00355 ast_verb(0, "SSL error loading private key file. <%s>", tmpprivate);
00356 sleep(2);
00357 cfg->enabled = 0;
00358 return 0;
00359 }
00360 }
00361 }
00362 if (!ast_strlen_zero(cfg->cipher)) {
00363 if (SSL_CTX_set_cipher_list(cfg->ssl_ctx, cfg->cipher) == 0 ) {
00364 if (!client) {
00365 ast_verb(0, "SSL cipher error <%s>", cfg->cipher);
00366 sleep(2);
00367 cfg->enabled = 0;
00368 return 0;
00369 }
00370 }
00371 }
00372 if (!ast_strlen_zero(cfg->cafile) || !ast_strlen_zero(cfg->capath)) {
00373 if (SSL_CTX_load_verify_locations(cfg->ssl_ctx, S_OR(cfg->cafile, NULL), S_OR(cfg->capath,NULL)) == 0)
00374 ast_verb(0, "SSL CA file(%s)/path(%s) error\n", cfg->cafile, cfg->capath);
00375 }
00376
00377 ast_verb(0, "SSL certificate ok\n");
00378 return 1;
00379 #endif
00380 }
00381
00382 int ast_ssl_setup(struct ast_tls_config *cfg)
00383 {
00384 return __ssl_setup(cfg, 0);
00385 }
00386
00387 struct ast_tcptls_session_instance *ast_tcptls_client_start(struct ast_tcptls_session_instance *tcptls_session)
00388 {
00389 struct ast_tcptls_session_args *desc;
00390 int flags;
00391
00392 if (!(desc = tcptls_session->parent)) {
00393 goto client_start_error;
00394 }
00395
00396 if (ast_connect(desc->accept_fd, &desc->remote_address)) {
00397 ast_log(LOG_ERROR, "Unable to connect %s to %s: %s\n",
00398 desc->name,
00399 ast_sockaddr_stringify(&desc->remote_address),
00400 strerror(errno));
00401 goto client_start_error;
00402 }
00403
00404 flags = fcntl(desc->accept_fd, F_GETFL);
00405 fcntl(desc->accept_fd, F_SETFL, flags & ~O_NONBLOCK);
00406
00407 if (desc->tls_cfg) {
00408 desc->tls_cfg->enabled = 1;
00409 __ssl_setup(desc->tls_cfg, 1);
00410 }
00411
00412 return handle_tcptls_connection(tcptls_session);
00413
00414 client_start_error:
00415 close(desc->accept_fd);
00416 desc->accept_fd = -1;
00417 if (tcptls_session) {
00418 ao2_ref(tcptls_session, -1);
00419 }
00420 return NULL;
00421
00422 }
00423
00424 struct ast_tcptls_session_instance *ast_tcptls_client_create(struct ast_tcptls_session_args *desc)
00425 {
00426 int x = 1;
00427 struct ast_tcptls_session_instance *tcptls_session = NULL;
00428
00429
00430 if (!ast_sockaddr_cmp(&desc->old_address, &desc->remote_address)) {
00431 ast_debug(1, "Nothing changed in %s\n", desc->name);
00432 return NULL;
00433 }
00434
00435
00436 ast_sockaddr_setnull(&desc->old_address);
00437
00438 if (desc->accept_fd != -1)
00439 close(desc->accept_fd);
00440
00441 desc->accept_fd = socket(ast_sockaddr_is_ipv6(&desc->remote_address) ?
00442 AF_INET6 : AF_INET, SOCK_STREAM, IPPROTO_TCP);
00443 if (desc->accept_fd < 0) {
00444 ast_log(LOG_WARNING, "Unable to allocate socket for %s: %s\n",
00445 desc->name, strerror(errno));
00446 return NULL;
00447 }
00448
00449
00450
00451 if (!ast_sockaddr_isnull(&desc->local_address)) {
00452 setsockopt(desc->accept_fd, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x));
00453 if (ast_bind(desc->accept_fd, &desc->local_address)) {
00454 ast_log(LOG_ERROR, "Unable to bind %s to %s: %s\n",
00455 desc->name,
00456 ast_sockaddr_stringify(&desc->local_address),
00457 strerror(errno));
00458 goto error;
00459 }
00460 }
00461
00462 if (!(tcptls_session = ao2_alloc(sizeof(*tcptls_session), session_instance_destructor)))
00463 goto error;
00464
00465 ast_mutex_init(&tcptls_session->lock);
00466 tcptls_session->client = 1;
00467 tcptls_session->fd = desc->accept_fd;
00468 tcptls_session->parent = desc;
00469 tcptls_session->parent->worker_fn = NULL;
00470 ast_sockaddr_copy(&tcptls_session->remote_address,
00471 &desc->remote_address);
00472
00473
00474 ast_sockaddr_copy(&desc->old_address, &desc->remote_address);
00475 return tcptls_session;
00476
00477 error:
00478 close(desc->accept_fd);
00479 desc->accept_fd = -1;
00480 if (tcptls_session)
00481 ao2_ref(tcptls_session, -1);
00482 return NULL;
00483 }
00484
00485 void ast_tcptls_server_start(struct ast_tcptls_session_args *desc)
00486 {
00487 int flags;
00488 int x = 1;
00489
00490
00491 if (!ast_sockaddr_cmp(&desc->old_address, &desc->local_address)) {
00492 ast_debug(1, "Nothing changed in %s\n", desc->name);
00493 return;
00494 }
00495
00496
00497 ast_sockaddr_setnull(&desc->old_address);
00498
00499
00500 if (desc->master != AST_PTHREADT_NULL) {
00501 pthread_cancel(desc->master);
00502 pthread_kill(desc->master, SIGURG);
00503 pthread_join(desc->master, NULL);
00504 }
00505
00506 if (desc->accept_fd != -1)
00507 close(desc->accept_fd);
00508
00509
00510 if (ast_sockaddr_isnull(&desc->local_address)) {
00511 ast_debug(2, "Server disabled: %s\n", desc->name);
00512 return;
00513 }
00514
00515 desc->accept_fd = socket(ast_sockaddr_is_ipv6(&desc->local_address) ?
00516 AF_INET6 : AF_INET, SOCK_STREAM, 0);
00517 if (desc->accept_fd < 0) {
00518 ast_log(LOG_ERROR, "Unable to allocate socket for %s: %s\n", desc->name, strerror(errno));
00519 return;
00520 }
00521
00522 setsockopt(desc->accept_fd, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x));
00523 if (ast_bind(desc->accept_fd, &desc->local_address)) {
00524 ast_log(LOG_ERROR, "Unable to bind %s to %s: %s\n",
00525 desc->name,
00526 ast_sockaddr_stringify(&desc->local_address),
00527 strerror(errno));
00528 goto error;
00529 }
00530 if (listen(desc->accept_fd, 10)) {
00531 ast_log(LOG_ERROR, "Unable to listen for %s!\n", desc->name);
00532 goto error;
00533 }
00534 flags = fcntl(desc->accept_fd, F_GETFL);
00535 fcntl(desc->accept_fd, F_SETFL, flags | O_NONBLOCK);
00536 if (ast_pthread_create_background(&desc->master, NULL, desc->accept_fn, desc)) {
00537 ast_log(LOG_ERROR, "Unable to launch thread for %s on %s: %s\n",
00538 desc->name,
00539 ast_sockaddr_stringify(&desc->local_address),
00540 strerror(errno));
00541 goto error;
00542 }
00543
00544
00545 ast_sockaddr_copy(&desc->old_address, &desc->local_address);
00546
00547 return;
00548
00549 error:
00550 close(desc->accept_fd);
00551 desc->accept_fd = -1;
00552 }
00553
00554 void ast_tcptls_close_session_file(struct ast_tcptls_session_instance *tcptls_session)
00555 {
00556 if (tcptls_session->f) {
00557 if (fclose(tcptls_session->f)) {
00558 ast_log(LOG_ERROR, "fclose() failed: %s\n", strerror(errno));
00559 }
00560 tcptls_session->f = NULL;
00561 tcptls_session->fd = -1;
00562 } else if (tcptls_session->fd != -1) {
00563 if (close(tcptls_session->fd)) {
00564 ast_log(LOG_ERROR, "close() failed: %s\n", strerror(errno));
00565 }
00566 tcptls_session->fd = -1;
00567 } else {
00568 ast_log(LOG_ERROR, "ast_tcptls_close_session_file invoked on session instance without file or file descriptor\n");
00569 }
00570 }
00571
00572 void ast_tcptls_server_stop(struct ast_tcptls_session_args *desc)
00573 {
00574 if (desc->master != AST_PTHREADT_NULL) {
00575 pthread_cancel(desc->master);
00576 pthread_kill(desc->master, SIGURG);
00577 pthread_join(desc->master, NULL);
00578 desc->master = AST_PTHREADT_NULL;
00579 }
00580 if (desc->accept_fd != -1)
00581 close(desc->accept_fd);
00582 desc->accept_fd = -1;
00583 ast_debug(2, "Stopped server :: %s\n", desc->name);
00584 }
00585
00586 int ast_tls_read_conf(struct ast_tls_config *tls_cfg, struct ast_tcptls_session_args *tls_desc, const char *varname, const char *value)
00587 {
00588 if (!strcasecmp(varname, "tlsenable") || !strcasecmp(varname, "sslenable")) {
00589 tls_cfg->enabled = ast_true(value) ? 1 : 0;
00590 } else if (!strcasecmp(varname, "tlscertfile") || !strcasecmp(varname, "sslcert") || !strcasecmp(varname, "tlscert")) {
00591 ast_free(tls_cfg->certfile);
00592 tls_cfg->certfile = ast_strdup(value);
00593 } else if (!strcasecmp(varname, "tlsprivatekey") || !strcasecmp(varname, "sslprivatekey")) {
00594 ast_free(tls_cfg->pvtfile);
00595 tls_cfg->pvtfile = ast_strdup(value);
00596 } else if (!strcasecmp(varname, "tlscipher") || !strcasecmp(varname, "sslcipher")) {
00597 ast_free(tls_cfg->cipher);
00598 tls_cfg->cipher = ast_strdup(value);
00599 } else if (!strcasecmp(varname, "tlscafile")) {
00600 ast_free(tls_cfg->cafile);
00601 tls_cfg->cafile = ast_strdup(value);
00602 } else if (!strcasecmp(varname, "tlscapath") || !strcasecmp(varname, "tlscadir")) {
00603 ast_free(tls_cfg->capath);
00604 tls_cfg->capath = ast_strdup(value);
00605 } else if (!strcasecmp(varname, "tlsverifyclient")) {
00606 ast_set2_flag(&tls_cfg->flags, ast_true(value), AST_SSL_VERIFY_CLIENT);
00607 } else if (!strcasecmp(varname, "tlsdontverifyserver")) {
00608 ast_set2_flag(&tls_cfg->flags, ast_true(value), AST_SSL_DONT_VERIFY_SERVER);
00609 } else if (!strcasecmp(varname, "tlsbindaddr") || !strcasecmp(varname, "sslbindaddr")) {
00610 if (ast_parse_arg(value, PARSE_ADDR, &tls_desc->local_address))
00611 ast_log(LOG_WARNING, "Invalid %s '%s'\n", varname, value);
00612 } else if (!strcasecmp(varname, "tlsclientmethod") || !strcasecmp(varname, "sslclientmethod")) {
00613 if (!strcasecmp(value, "tlsv1")) {
00614 ast_set_flag(&tls_cfg->flags, AST_SSL_TLSV1_CLIENT);
00615 ast_clear_flag(&tls_cfg->flags, AST_SSL_SSLV3_CLIENT);
00616 ast_clear_flag(&tls_cfg->flags, AST_SSL_SSLV2_CLIENT);
00617 } else if (!strcasecmp(value, "sslv3")) {
00618 ast_set_flag(&tls_cfg->flags, AST_SSL_SSLV3_CLIENT);
00619 ast_clear_flag(&tls_cfg->flags, AST_SSL_SSLV2_CLIENT);
00620 ast_clear_flag(&tls_cfg->flags, AST_SSL_TLSV1_CLIENT);
00621 } else if (!strcasecmp(value, "sslv2")) {
00622 ast_set_flag(&tls_cfg->flags, AST_SSL_SSLV2_CLIENT);
00623 ast_clear_flag(&tls_cfg->flags, AST_SSL_TLSV1_CLIENT);
00624 ast_clear_flag(&tls_cfg->flags, AST_SSL_SSLV3_CLIENT);
00625 }
00626 } else {
00627 return -1;
00628 }
00629
00630 return 0;
00631 }