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Code Issues Projects Releases Wiki Activity

remove memcache version, it never worked right and is unworkable w/out a lot 

of effort.  will revisit when pluggable limit implemented


git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15908 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Rupa Schomaker 2009-12-11 16:14:52 +00:00
parent d2e00a74fd
commit b78a8b3236
1 changed files with 0 additions and 398 deletions
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398
src/mod/applications/mod_limit/mod_limit.c
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@ -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 "<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;
@ -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, "<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");