func_pjsip_endpoint: Add PJSIP_ENDPOINT function for querying endpoint details

This patch adds a new function, PJSIP_ENDPOINT, which lets the dialplan query,
for any endpoint, any property configured on an endpoint. This function is a
companion to the CHANNEL function, which can be used to extract the endpoint
name for a channel.

Review: https://reviewboard.asterisk.org/r/3035
........

Merged revisions 403616 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@403617 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 161 insertions, 0 deletions

diff --git a/funcs/func_pjsip_endpoint.c b/funcs/func_pjsip_endpoint.c
new file mode 100644
index 000000000..8d079ed2d
--- /dev/null
+++ b/funcs/func_pjsip_endpoint.c
@@ -0,0 +1,161 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2013, Digium, Inc.
+ *
+ * Matt Jordan <mjordan@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 Get information about a PJSIP endpoint
+ *
+ * \author \verbatim Matt Jordan <mjordan@digium.com> \endverbatim
+ *
+ * \ingroup functions
+ *
+ */
+
+/*** MODULEINFO
+	<support_level>core</support_level>
+	<depend>pjproject</depend>
+	<depend>res_pjsip</depend>
+ ***/
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <pjsip.h>
+#include <pjlib.h>
+
+#include "asterisk/app.h"
+#include "asterisk/pbx.h"
+#include "asterisk/module.h"
+#include "asterisk/channel.h"
+#include "asterisk/sorcery.h"
+#include "asterisk/res_pjsip.h"
+
+/*** DOCUMENTATION
+	<function name="PJSIP_ENDPOINT" language="en_US">
+		<synopsis>
+			Get information about a PJSIP endpoint
+		</synopsis>
+		<syntax>
+			<parameter name="name" required="true">
+				<para>The name of the endpoint to query.</para>
+			</parameter>
+			<parameter name="field" required="true">
+				<para>The configuration option for the endpoint to query for.
+				Supported options are those fields on the
+				<replaceable>endpoint</replaceable> object in
+				<filename>pjsip.conf</filename>.</para>
+				<enumlist>
+					<configOptionToEnum>
+						<xi:include xpointer="xpointer(/docs/configInfo[@name='res_pjsip']/configFile[@name='pjsip.conf']/configObject[@name='endpoint']/configOption)"/>
+					</configOptionToEnum>
+				</enumlist>
+			</parameter>
+		</syntax>
+	</function>
+***/
+
+static int pjsip_endpoint_function_read(struct ast_channel *chan,
+	const char *cmd, char *data, struct ast_str **buf, ssize_t len)
+{
+	struct ast_sorcery *pjsip_sorcery;
+	char *parsed_data = ast_strdupa(data);
+	RAII_VAR(void *, endpoint_obj, NULL, ao2_cleanup);
+	struct ast_variable *change_set;
+	struct ast_variable *it_change_set;
+	int res;
+
+	AST_DECLARE_APP_ARGS(args,
+		AST_APP_ARG(endpoint_name);
+		AST_APP_ARG(field_name);
+	);
+
+	/* Check for zero arguments */
+	if (ast_strlen_zero(parsed_data)) {
+		ast_log(AST_LOG_ERROR, "Cannot call %s without arguments\n", cmd);
+		return -1;
+	}
+
+	AST_STANDARD_APP_ARGS(args, parsed_data);
+
+	if (ast_strlen_zero(args.endpoint_name)) {
+		ast_log(AST_LOG_ERROR, "Cannot call %s without an endpoint name to query\n", cmd);
+		return -1;
+	}
+
+	if (ast_strlen_zero(args.field_name)) {
+		ast_log(AST_LOG_ERROR, "Cannot call %s with an empty field name to query\n", cmd);
+		return -1;
+	}
+
+	pjsip_sorcery = ast_sip_get_sorcery();
+	if (!pjsip_sorcery) {
+		ast_log(AST_LOG_ERROR, "Unable to retrieve PJSIP configuration: sorcery object is NULL\n");
+		return -1;
+	}
+
+	endpoint_obj = ast_sorcery_retrieve_by_id(pjsip_sorcery, "endpoint", args.endpoint_name);
+	if (!endpoint_obj) {
+		ast_log(AST_LOG_WARNING, "Failed to retrieve information for endpoint '%s'\n", args.endpoint_name);
+		return -1;
+	}
+
+	change_set = ast_sorcery_objectset_create(pjsip_sorcery, endpoint_obj);
+	if (!change_set) {
+		ast_log(AST_LOG_WARNING, "Failed to retrieve information for endpoint '%s': change set is NULL\n", args.endpoint_name);
+		return -1;
+	}
+
+	for (it_change_set = change_set; it_change_set; it_change_set = it_change_set->next) {
+		if (!strcmp(it_change_set->name, args.field_name)) {
+			if (!strcmp(it_change_set->name, "disallow")) {
+				ast_str_set(buf, len, "!%s", it_change_set->value);
+			} else {
+				ast_str_set(buf, len, "%s", it_change_set->value);
+			}
+			break;
+		}
+	}
+
+	res = it_change_set ? 0 : 1;
+	if (res) {
+		ast_log(AST_LOG_WARNING, "Unknown property '%s' for PJSIP endpoint\n", args.field_name);
+	}
+
+	ast_variables_destroy(change_set);
+
+	return res;
+}
+
+
+static struct ast_custom_function pjsip_endpoint_function = {
+	.name = "PJSIP_ENDPOINT",
+	.read2 = pjsip_endpoint_function_read,
+};
+
+static int unload_module(void)
+{
+	return ast_custom_function_unregister(&pjsip_endpoint_function);
+}
+
+static int load_module(void)
+{
+	return ast_custom_function_register(&pjsip_endpoint_function);
+}
+
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Get information about a PJSIP endpoint");