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143 lines
3.6 KiB
C
143 lines
3.6 KiB
C
/*
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* Copyright (C) 2006 Voop as
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* Thorsten Lockert <tholo@voop.as>
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief SNMP Agent / SubAgent support for Asterisk
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*
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* \author Thorsten Lockert <tholo@voop.as>
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*
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* Uses the Net-SNMP libraries available at
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* http://net-snmp.sourceforge.net/
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*/
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/*! \li \ref res_snmp.c uses the configuration file \ref res_snmp.conf
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* \addtogroup configuration_file Configuration Files
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*/
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/*!
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* \page res_snmp.conf res_snmp.conf
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* \verbinclude res_snmp.conf.sample
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*/
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/*** MODULEINFO
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<depend>netsnmp</depend>
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<support_level>extended</support_level>
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***/
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#include "asterisk.h"
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ASTERISK_REGISTER_FILE()
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#include "asterisk/channel.h"
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#include "asterisk/module.h"
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#include "snmp/agent.h"
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#define MODULE_DESCRIPTION "SNMP [Sub]Agent for Asterisk"
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int res_snmp_agentx_subagent;
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int res_snmp_dont_stop;
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static int res_snmp_enabled;
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static pthread_t thread = AST_PTHREADT_NULL;
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/*!
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* \brief Load res_snmp.conf config file
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* \return 1 on load, 0 file does not exist
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*/
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static int load_config(void)
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{
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struct ast_variable *var;
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struct ast_config *cfg;
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struct ast_flags config_flags = { 0 };
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char *cat;
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res_snmp_enabled = 0;
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res_snmp_agentx_subagent = 1;
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cfg = ast_config_load("res_snmp.conf", config_flags);
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if (cfg == CONFIG_STATUS_FILEMISSING || cfg == CONFIG_STATUS_FILEINVALID) {
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ast_log(LOG_WARNING, "Could not load res_snmp.conf\n");
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return 0;
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}
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cat = ast_category_browse(cfg, NULL);
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while (cat) {
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var = ast_variable_browse(cfg, cat);
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if (strcasecmp(cat, "general") == 0) {
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while (var) {
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if (strcasecmp(var->name, "subagent") == 0) {
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if (ast_true(var->value))
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res_snmp_agentx_subagent = 1;
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else if (ast_false(var->value))
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res_snmp_agentx_subagent = 0;
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else {
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ast_log(LOG_ERROR, "Value '%s' does not evaluate to true or false.\n", var->value);
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ast_config_destroy(cfg);
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return 1;
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}
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} else if (strcasecmp(var->name, "enabled") == 0) {
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res_snmp_enabled = ast_true(var->value);
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} else {
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ast_log(LOG_ERROR, "Unrecognized variable '%s' in category '%s'\n", var->name, cat);
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ast_config_destroy(cfg);
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return 1;
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}
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var = var->next;
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}
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} else {
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ast_log(LOG_ERROR, "Unrecognized category '%s'\n", cat);
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ast_config_destroy(cfg);
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return 1;
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}
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cat = ast_category_browse(cfg, cat);
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}
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ast_config_destroy(cfg);
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return 1;
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}
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/*!
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* \brief Load the module
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*
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* Module loading including tests for configuration or dependencies.
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* This function can return AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_DECLINE,
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* or AST_MODULE_LOAD_SUCCESS. If a dependency or environment variable fails
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* tests return AST_MODULE_LOAD_FAILURE. If the module can not load the
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* configuration file or other non-critical problem return
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* AST_MODULE_LOAD_DECLINE. On success return AST_MODULE_LOAD_SUCCESS.
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*/
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static int load_module(void)
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{
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if(!load_config())
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return AST_MODULE_LOAD_DECLINE;
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ast_verb(1, "Loading [Sub]Agent Module\n");
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res_snmp_dont_stop = 1;
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if (res_snmp_enabled)
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return ast_pthread_create_background(&thread, NULL, agent_thread, NULL);
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else
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return 0;
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}
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static int unload_module(void)
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{
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ast_verb(1, "Unloading [Sub]Agent Module\n");
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res_snmp_dont_stop = 0;
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return ((thread != AST_PTHREADT_NULL) ? pthread_join(thread, NULL) : 0);
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}
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AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "SNMP [Sub]Agent for Asterisk",
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.support_level = AST_MODULE_SUPPORT_EXTENDED,
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.load = load_module,
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.unload = unload_module,
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);
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