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;
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 "<realm> <id> [<max>[/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 "<realm> <id> [<max>[/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 "<realm> <id>"
-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;
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, "<realm> <id>");
SWITCH_ADD_API(commands_api_interface, "db", "db get/set", db_api_function, "[insert|delete|select]/<realm>/<key>/<value>");
switch_console_set_complete("add db insert");
projects / thirdparty / freeswitch.git / commitdiff
