Add SNMP support (bug #6439)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@11193 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_snmp.c

@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2006 Voop as
+ * Thorsten Lockert <tholo@voop.as>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief SNMP Agent / SubAgent support for Asterisk
+ *
+ * \author Thorsten Lockert <tholo@voop.as>
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include "asterisk/channel.h"
+#include "asterisk/module.h"
+#include "asterisk/logger.h"
+#include "asterisk/options.h"
+
+#include "snmp/agent.h"
+
+#define	MODULE_DESCRIPTION	"SNMP [Sub]Agent for Asterisk"
+
+int res_snmp_agentx_subagent;
+int res_snmp_dont_stop;
+int res_snmp_enabled;
+
+static pthread_t thread;
+
+static int load_config(void)
+{
+    struct ast_variable *var;
+    struct ast_config *cfg;
+    char *cat;
+	
+	res_snmp_enabled = 0;
+	res_snmp_agentx_subagent = 1;
+    cfg = ast_config_load("res_snmp.conf");
+    if (cfg) {
+		cat = ast_category_browse(cfg, NULL);
+		while (cat) {
+			var = ast_variable_browse(cfg, cat);
+
+			if (strcasecmp(cat, "general") == 0) {
+				while (var) {
+					if (strcasecmp(var->name, "subagent") == 0) {
+						if (ast_true(var->value))
+							res_snmp_agentx_subagent = 1;
+						else if (ast_false(var->value))
+							res_snmp_agentx_subagent = 0;
+						else {
+							ast_log(LOG_ERROR, "Value '%s' does not evaluate to true or false.\n",
+									var->value);
+							ast_config_destroy(cfg);
+							return 1;
+						}
+					} else if (strcasecmp(var->name, "enabled") == 0) {
+						res_snmp_enabled = ast_true(var->value);
+					} else {
+						ast_log(LOG_ERROR, "Unrecognized variable '%s' in category '%s'\n",
+								var->name, cat);
+						ast_config_destroy(cfg);
+						return 1;
+					}
+					var = var->next;
+				}
+			}
+			else {
+				ast_log(LOG_ERROR, "Unrecognized category '%s'\n", cat);
+				ast_config_destroy(cfg);
+				return 1;
+			}
+
+			cat = ast_category_browse(cfg, cat);
+		}
+		ast_config_destroy(cfg);
+    }
+
+    return 0;
+}
+
+int load_module(void)
+{
+    load_config();
+
+    ast_verbose(VERBOSE_PREFIX_1 "Loading [Sub]Agent Module\n");
+
+    res_snmp_dont_stop = 1;
+	if (res_snmp_enabled)
+	    return ast_pthread_create(&thread, NULL, agent_thread, NULL);
+	else
+		return 0;
+}
+
+int unload_module(void)
+{
+    ast_verbose(VERBOSE_PREFIX_1 "Unloading [Sub]Agent Module\n");
+
+    res_snmp_dont_stop = 0;
+    return pthread_join(thread, NULL);
+}
+
+int reload(void)
+{
+    ast_verbose(VERBOSE_PREFIX_1 "Reloading [Sub]Agent Module\n");
+
+    res_snmp_dont_stop = 0;
+    pthread_join(thread, NULL);
+
+    load_config();
+
+    res_snmp_dont_stop = 1;
+	if (res_snmp_enabled)
+	    return ast_pthread_create(&thread, NULL, agent_thread, NULL);
+	else
+		return 0;
+}
+
+int usecount(void)
+{
+    return 0;
+}
+
+char *key(void)
+{
+    return ASTERISK_GPL_KEY;
+}
+
+char *description(void)
+{
+    return MODULE_DESCRIPTION;
+}
+
+/*
+ * Local Variables:
+ * c-file-style: gnu
+ * c-basic-offset: 4
+ * c-file-offsets: ((case-label . 0))
+ * tab-width: 4
+ * indent-tabs-mode: t
+ * End:
+ */