AMI hook interface

This patch, originally submitted by jozza, enables custom modules to send actions to AMI
and receive messages from AMI via a hook interface. Included is a simple test module to
illustrate the interface.

(closes issue #14635)
Reported by: jozza

Review: https://reviewboard.asterisk.org/r/412/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@227448 65c4cc65-6c06-0410-ace0-fbb531ad65f3

tests/test_amihooks.c

@@ -0,0 +1,104 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2009, Digium, Inc.
+ *
+ * David Brooks <dbrooks@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * 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 Test AMI hook
+ *
+ * \author David Brooks <dbrooks@digium.com> based off of code written by Russell Bryant <russell@digium.com>
+ *
+ * This is simply an example or test module illustrating the ability for a custom module
+ * to hook into AMI. Registration for AMI events and sending of AMI actions is shown.
+ */
+
+/*** MODULEINFO
+	<defaultenabled>no</defaultenabled>
+ ***/
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include "asterisk/module.h"
+#include "asterisk/cli.h"
+#include "asterisk/utils.h"
+#include "asterisk/manager.h"
+
+/* The helper function is required by struct manager_custom_hook. See __manager_event for details */
+static int amihook_helper(int category, const char *event, char *content)
+{
+	ast_log(LOG_NOTICE, "AMI Event: \nCategory: %d Event: %s\n%s\n", category, event, content);
+	return 0;
+}
+
+static struct manager_custom_hook test_hook = {
+	.file = __FILE__,
+	.helper = &amihook_helper,
+};
+
+static int test_send(struct ast_cli_args *a) {
+	int res;
+
+	/* Send a test action (core show version) to the AMI */
+	res = ast_hook_send_action(&test_hook, "Action: Command\nCommand: core show version\nActionID: 987654321\n");
+
+	return res;
+}
+
+static char *handle_cli_amihook_test_send(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
+{
+	switch (cmd) {
+	case CLI_INIT:
+		e->command = "amihook send test";
+		e->usage = ""
+			"Usage: amihook send test"
+			"";
+		return NULL;
+	case CLI_GENERATE:
+		return NULL;
+	case CLI_HANDLER:
+		test_send(a);
+		return CLI_SUCCESS;
+	}
+
+	return CLI_FAILURE;
+}
+
+static struct ast_cli_entry cli_amihook_evt[] = {
+	AST_CLI_DEFINE(handle_cli_amihook_test_send, "Test module for AMI hook"),
+};
+
+static int unload_module(void)
+{
+	ast_manager_unregister_hook(&test_hook);
+	return ast_cli_unregister_multiple(cli_amihook_evt, ARRAY_LEN(cli_amihook_evt));
+}
+
+static int load_module(void)
+{
+	int res;
+
+	/* Register the hook for AMI events */
+	ast_manager_register_hook(&test_hook);
+
+	res = ast_cli_register_multiple(cli_amihook_evt, ARRAY_LEN(cli_amihook_evt));
+
+	return res ? AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS;
+}
+
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "AMI Hook Test Module");