diff --git a/src/mod/applications/mod_limit/mod_limit.c b/src/mod/applications/mod_limit/mod_limit.c index b262c6eb40..0aedff2f8b 100644 --- a/src/mod/applications/mod_limit/mod_limit.c +++ b/src/mod/applications/mod_limit/mod_limit.c @@ -323,57 +323,6 @@ static switch_status_t hash_state_handler(switch_core_session_t *session) return SWITCH_STATUS_SUCCESS; } -static switch_status_t memcache_state_handler(switch_core_session_t *session) -{ - switch_channel_t *channel = switch_core_session_get_channel(session); - switch_channel_state_t state = switch_channel_get_state(channel); - int argc = 0; - char *argv[32] = { 0 }; - char *pvt = switch_channel_get_private(channel, "limit_keys"); - char *mydata = NULL; - int i = 0; - - char *hashkey = NULL; - uint32_t total_usage = 0; - char *cmd = NULL; - switch_stream_handle_t stream = { 0 }; - const char *vval = switch_channel_get_variable(channel, LIMIT_IGNORE_TRANSFER_VARIABLE); - - SWITCH_STANDARD_STREAM(stream); - - switch_assert(pvt); - - /* The call is either hung up, or is going back into the dialplan, decrement appropriate couters */ - if (state >= CS_HANGUP || (state == CS_ROUTING && !switch_true(vval))) { - - /* Loop through the channel's keys which contains mapping to all the limits referenced by that channel */ - mydata = switch_core_session_strdup(session, pvt); - argc = switch_separate_string(mydata, ',', argv, (sizeof(argv) / sizeof(argv[0]))); - for (i = 0; i < argc; i++) { - hashkey = argv[i]; - cmd = switch_core_session_sprintf(session, "decrement limit:%s_total 1", hashkey); - switch_api_execute("memcache", cmd, session, &stream); - if (strncmp("-ERR", stream.data, 4)) { - total_usage = atoi(stream.data); - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Usage for %s is now %d\n", (const char*)hashkey, total_usage); - } else { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Error from mod_memcache %s.", (const char *) stream.data); - goto end; - } - - stream.end = stream.data; - } - - /* Remove handler */ - switch_core_event_hook_remove_state_change(session, memcache_state_handler); - switch_channel_set_private(channel, "limit_keys", NULL); - } - -end: - switch_safe_free(stream.data); - return SWITCH_STATUS_SUCCESS; -} - struct callback { char *buf; size_t len; @@ -1270,350 +1219,6 @@ end: return SWITCH_STATUS_SUCCESS; } -/* \brief Enforces limit_memcache restrictions - * \param session current session - * \param realm limit realm - * \param id limit id - * \param max maximum count - * \param interval interval for rate limiting - * \return SWITCH_TRUE if the access is allowed, SWITCH_FALSE if it isnt - */ -static switch_bool_t do_limit_memcache(switch_core_session_t *session, const char *realm, const char *id, int max, int interval) -{ - switch_channel_t *channel = switch_core_session_get_channel(session); - char *hashkey = NULL; - switch_bool_t status = SWITCH_TRUE; - uint8_t increment = 1; - uint32_t total_usage = 0; - uint32_t rate_usage = 0; - char *cmd = NULL; - char *pvt = NULL; - int argc = 0; - int i = 0; - char *argv[32] = { 0 }; - char *mydata = NULL; - - switch_stream_handle_t stream = { 0 }; - - if (switch_loadable_module_exists("mod_memcache") != SWITCH_STATUS_SUCCESS) { - status = SWITCH_TRUE; - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "mod_memcache is not loaded."); - goto end; - } - - SWITCH_STANDARD_STREAM(stream); - hashkey = switch_core_session_sprintf(session, "%s_%s", realm, id); - - /* Did we already run on this channel before? */ - if ((pvt = switch_channel_get_private(channel, "limit_keys"))) - { - /* Yes, but check if we did that realm+id - If we didnt, allow incrementing the counter. - If we did, dont touch it but do the validation anyways - */ - mydata = switch_core_session_strdup(session, pvt); - argc = switch_separate_string(mydata, ',', argv, (sizeof(argv) / sizeof(argv[0]))); - for (i = 0; i < argc; i++) { - if (!strcmp(hashkey, argv[i])) { - increment = 0; - break; - } - } - } - - cmd = switch_core_session_sprintf(session, "get limit:%s_total", hashkey); - switch_api_execute("memcache", cmd, session, &stream); - if (strncmp("-ERR", stream.data, 4)) { - total_usage = atoi(stream.data); - } else if (!strncmp("-ERR NOT FOUND", stream.data, 14)) { - total_usage = 0; - } else { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Error from mod_memcache %s.", (const char *) stream.data); - status = SWITCH_TRUE; - goto end; - } - - stream.end = stream.data; - - if (interval > 0) { - cmd = switch_core_session_sprintf(session, "increment limit:%s_rate 1 %d", hashkey, interval); - switch_api_execute("memcache", cmd, session, &stream); - if (strncmp("-ERR", stream.data, 4)) { - rate_usage = atoi(stream.data); - } else { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Error from mod_memcache %s.", (const char *) stream.data); - status = SWITCH_TRUE; - goto end; - } - if ((max >= 0) && (rate_usage > (uint32_t)max)) { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Usage for %s exceeds maximum rate of %d/%ds, now at %d\n", hashkey, max, interval, rate_usage); - status = SWITCH_FALSE; - goto end; - } - } else if ((max >= 0) && (total_usage + increment > (uint32_t)max)) { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Usage for %s is already at max value (%d)\n", hashkey, total_usage); - status = SWITCH_FALSE; - goto end; - } - - stream.end = stream.data; - - if (increment) { - cmd = switch_core_session_sprintf(session, "increment limit:%s_total 1", hashkey); - switch_api_execute("memcache", cmd, session, &stream); - if (strncmp("-ERR", stream.data, 4)) { - total_usage = atoi(stream.data); - } else { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Error from mod_memcache %s.", (const char *) stream.data); - status = SWITCH_TRUE; - goto end; - } - if (max == -1) { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Usage for %s is now %d\n", hashkey, total_usage); - } else if (interval == 0) { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Usage for %s is now %d/%d\n", hashkey, total_usage, max); - } else { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Usage for %s is now %d/%d for the last %d seconds\n", hashkey, rate_usage, max, interval); - } - - limit_fire_event(realm, id, total_usage, rate_usage, max, max >=0 ? (uint32_t)max : 0); - } - - /* Save current usage & rate into channel variables so it can be used later in the dialplan, or added to CDR records */ - { - const char *susage = switch_core_session_sprintf(session, "%d", total_usage); - const char *srate = switch_core_session_sprintf(session, "%d", rate_usage); - - switch_channel_set_variable(channel, "limit_usage", susage); - switch_channel_set_variable(channel, switch_core_session_sprintf(session, "limit_usage_%s", hashkey), susage); - - switch_channel_set_variable(channel, "limit_rate", srate); - switch_channel_set_variable(channel, switch_core_session_sprintf(session, "limit_rate_%s", hashkey), srate); - } - - if (pvt && increment) { - pvt = switch_core_session_sprintf(session, "%s,%s", pvt, hashkey); - } else { - /* This is the first limit check on this channel, create a hashtable, set our prviate data and add a state handler */ - pvt = (char *) hashkey; - } - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "hash_keys: %s\n", pvt); - switch_channel_set_private(channel, "limit_keys", pvt); - - switch_core_event_hook_add_state_change(session, memcache_state_handler); - -end: - switch_safe_free(stream.data); - return status; -} - -/* !\brief Releases usage of a limit_hash-controlled ressource */ -static void limit_memcache_release(switch_core_session_t *session, const char *realm, const char *id) -{ - char *hashkey = NULL; - uint32_t total_usage = 0; - char *cmd = NULL; - switch_stream_handle_t stream = { 0 }; - SWITCH_STANDARD_STREAM(stream); - - if (switch_loadable_module_exists("mod_memcache") != SWITCH_STATUS_SUCCESS) { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "mod_memcache is not loaded."); - goto end; - } - - hashkey = switch_core_session_sprintf(session, "%s_%s", realm, id); - - cmd = switch_core_session_sprintf(session, "decrement limit:%s_total 1", hashkey); - switch_api_execute("memcache", cmd, session, &stream); - if (strncmp("-ERR", stream.data, 4)) { - total_usage = atoi(stream.data); - } else if (!strncmp("-ERR NOT FOUND", stream.data, 14)) { - total_usage = 0; - } else { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Error from mod_memcache %s.", (const char *) stream.data); - goto end; - } - - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Usage for %s is now %d\n", (const char*)hashkey, total_usage); - -end: - switch_safe_free(stream.data); -} - -#define LIMITMEMCACHE_USAGE " [[/interval]] [number [dialplan [context]]]" -#define LIMITMEMCACHE_DESC "limit access to a resource and transfer to an extension if the limit is exceeded" -SWITCH_STANDARD_APP(limit_memcache_function) -{ - int argc = 0; - char *argv[6] = { 0 }; - char *mydata = NULL; - char *realm = NULL; - char *id = NULL; - char *xfer_exten = NULL; - int max = -1; - int interval = 0; - char *szinterval = NULL; - switch_channel_t *channel = switch_core_session_get_channel(session); - - /* Parse application data */ - if (!zstr(data)) { - mydata = switch_core_session_strdup(session, data); - argc = switch_separate_string(mydata, ' ', argv, (sizeof(argv) / sizeof(argv[0]))); - } - - if (argc < 2) { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "USAGE: limit_memcache %s\n", LIMITMEMCACHE_USAGE); - return; - } - - realm = argv[0]; - id = argv[1]; - - /* If max is omitted, only act as a counter and skip maximum checks */ - if (argc > 2) { - if ((szinterval = strchr(argv[2], '/'))) - { - *szinterval++ = '\0'; - interval = atoi(szinterval); - } - - max = atoi(argv[2]); - - if (max < 0) { - max = 0; - } - } - - if (argc > 3) { - xfer_exten = argv[3]; - } else { - xfer_exten = limit_def_xfer_exten; - } - - if (!do_limit_memcache(session, realm, id, max, interval)) { - /* Limit exceeded */ - if (*xfer_exten == '!') { - switch_channel_hangup(channel, switch_channel_str2cause(xfer_exten+1)); - } else { - switch_ivr_session_transfer(session, xfer_exten, argv[4], argv[5]); - } - } -} - - -#define LIMITMEMCACHEEXECUTE_USAGE " [[/interval]] [application] [application arguments]" -#define LIMITMEMCACHEEXECUTE_DESC "limit access to a resource. the specified application will only be executed if the resource is available" -SWITCH_STANDARD_APP(limit_memcache_execute_function) -{ - int argc = 0; - char *argv[5] = { 0 }; - char *mydata = NULL; - char *realm = NULL; - char *id = NULL; - char *app = NULL; - char *app_arg = NULL; - int max = -1; - int interval = 0; - char *szinterval = NULL; - - /* Parse application data */ - if (!zstr(data)) { - mydata = switch_core_session_strdup(session, data); - argc = switch_separate_string(mydata, ' ', argv, (sizeof(argv) / sizeof(argv[0]))); - } - - if (argc < 2) { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "USAGE: limit_memcache_execute %s\n", LIMITMEMCACHEEXECUTE_USAGE); - return; - } - - realm = argv[0]; - id = argv[1]; - - /* If max is omitted, only act as a counter and skip maximum checks */ - if (argc > 2) { - if ((szinterval = strchr(argv[2], '/'))) - { - *szinterval++ = '\0'; - interval = atoi(szinterval); - } - - max = atoi(argv[2]); - - if (max < 0) { - max = 0; - } - } - - - app = argv[3]; - app_arg = argv[4]; - - if (zstr(app)) { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Missing application\n"); - return; - } - - if (do_limit_memcache(session, realm, id, max, interval)) { - switch_core_session_execute_application(session, app, app_arg); - limit_memcache_release(session, realm, id); - } -} - - -#define LIMIT_MEMCACHE_USAGE_USAGE " " -SWITCH_STANDARD_API(limit_memcache_usage_function) -{ - int argc = 0; - char *argv[3] = { 0 }; - char *mydata = NULL; - uint32_t count = 0; - char *apicmd = NULL; - switch_bool_t status = SWITCH_TRUE; - switch_stream_handle_t apistream = { 0 }; - - SWITCH_STANDARD_STREAM(apistream); - if (switch_loadable_module_exists("mod_memcache") != SWITCH_STATUS_SUCCESS) { - status = SWITCH_TRUE; - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "mod_memcache is not loaded."); - stream->write_function(stream, "-ERR mod_memcache not loaded"); - goto end; - } - - if (!zstr(cmd)) { - mydata = strdup(cmd); - switch_assert(mydata); - argc = switch_separate_string(mydata, ' ', argv, (sizeof(argv) / sizeof(argv[0]))); - } - - if (argc < 2) { - stream->write_function(stream, "USAGE: limit_memcache_usage %s\n", LIMIT_MEMCACHE_USAGE_USAGE); - goto end; - } - - apicmd = switch_mprintf("get limit:%s_%s_total", argv[0], argv[1]); - switch_api_execute("memcache", apicmd, session, &apistream); - if (strncmp("-ERR", apistream.data, 4)) { - count = atoi(apistream.data); - } else if (!strncmp("-ERR NOT FOUND", apistream.data, 14)) { - count = 0; - } else { - switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Error from mod_memcache %s.", (const char *) apistream.data); - status = SWITCH_TRUE; - goto end; - } - - stream->write_function(stream, "%d", count); - -end: - switch_safe_free(mydata); - switch_safe_free(apistream.data); - switch_safe_free(apicmd); - - return SWITCH_STATUS_SUCCESS; -} - - SWITCH_MODULE_LOAD_FUNCTION(mod_limit_load) { switch_status_t status; @@ -1650,14 +1255,11 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_limit_load) SWITCH_ADD_APP(app_interface, "limit_execute", "Limit", LIMITEXECUTE_USAGE, limit_execute_function, LIMITEXECUTE_USAGE, SAF_SUPPORT_NOMEDIA); SWITCH_ADD_APP(app_interface, "limit_hash", "Limit (hash)", LIMITHASH_DESC, limit_hash_function, LIMITHASH_USAGE, SAF_SUPPORT_NOMEDIA); SWITCH_ADD_APP(app_interface, "limit_hash_execute", "Limit (hash)", LIMITHASHEXECUTE_USAGE, limit_hash_execute_function, LIMITHASHEXECUTE_USAGE, SAF_SUPPORT_NOMEDIA); - SWITCH_ADD_APP(app_interface, "limit_memcache", "Limit (memcache)", LIMITMEMCACHE_DESC, limit_memcache_function, LIMITMEMCACHE_USAGE, SAF_SUPPORT_NOMEDIA); - SWITCH_ADD_APP(app_interface, "limit_memcache_execute", "Limit (memcache)", LIMITMEMCACHEEXECUTE_USAGE, limit_memcache_execute_function, LIMITMEMCACHEEXECUTE_USAGE, SAF_SUPPORT_NOMEDIA); SWITCH_ADD_APP(app_interface, "db", "Insert to the db", DB_DESC, db_function, DB_USAGE, SAF_SUPPORT_NOMEDIA); SWITCH_ADD_APP(app_interface, "hash", "Insert into the hashtable", HASH_DESC, hash_function, HASH_USAGE, SAF_SUPPORT_NOMEDIA) SWITCH_ADD_APP(app_interface, "group", "Manage a group", GROUP_DESC, group_function, GROUP_USAGE, SAF_SUPPORT_NOMEDIA); SWITCH_ADD_API(commands_api_interface, "limit_hash_usage", "Gets the usage count of a limited resource", limit_hash_usage_function, LIMIT_HASH_USAGE_USAGE); - SWITCH_ADD_API(commands_api_interface, "limit_memcache_usage", "Gets the usage count of a limited resource", limit_memcache_usage_function, LIMIT_MEMCACHE_USAGE_USAGE); SWITCH_ADD_API(commands_api_interface, "limit_usage", "Gets the usage count of a limited resource", limit_usage_function, " "); SWITCH_ADD_API(commands_api_interface, "db", "db get/set", db_api_function, "[insert|delete|select]///"); switch_console_set_complete("add db insert");