[Asterisk-code-review] app_blind_transfer: new application BlindTransfer (...asterisk[16])

Alexei Gradinari asteriskteam at digium.com
Wed May 15 15:23:50 CDT 2019


Alexei Gradinari has uploaded this change for review. ( https://gerrit.asterisk.org/c/asterisk/+/11381


Change subject: app_blind_transfer: new application BlindTransfer
......................................................................

app_blind_transfer: new application BlindTransfer

BlindTransfer redirects all channels currently bridged to the
caller channel to the specified destination.

Change-Id: I9d55e7f69ccfd4472dec00d62771d6de8803215a
---
A apps/app_blind_transfer.c
A doc/CHANGES-staging/app_blind_transfer.txt
M menuselect/example_menuselect-tree
M menuselect/test/menuselect-tree
4 files changed, 147 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/81/11381/1

diff --git a/apps/app_blind_transfer.c b/apps/app_blind_transfer.c
new file mode 100644
index 0000000..c64d286
--- /dev/null
+++ b/apps/app_blind_transfer.c
@@ -0,0 +1,139 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2019, Alexei Gradinari
+ *
+ * Alexei Gradinari <alex2grad at gmail.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 Blind transfer by caller channel
+ *
+ * \author Alexei Gradinari <alex2grad at gmail.com>
+ *
+ * \ingroup applications
+ */
+
+/*** MODULEINFO
+	<support_level>core</support_level>
+ ***/
+
+#include "asterisk.h"
+
+#include "asterisk/pbx.h"
+#include "asterisk/module.h"
+#include "asterisk/app.h"
+#include "asterisk/channel.h"
+#include "asterisk/bridge.h"
+
+/*** DOCUMENTATION
+	<application name="BlindTransfer" language="en_US">
+		<synopsis>
+			Blind transfer channel(s) to the extension and context provided
+		</synopsis>
+		<syntax>
+			<parameter name="exten" required="true">
+				<para>Specify extension.</para>
+			</parameter>
+			<parameter name="context">
+				<para>Optionally specify a context.
+				By default, Asterisk will use the caller channel context.</para>
+			</parameter>
+		</syntax>
+		<description>
+			<para>Redirect all channels currently bridged to the caller channel to the
+			specified destination.</para>
+			<para>The result of the application will be reported in the <variable>BLINDTRANSFERSTATUS</variable>
+			channel variable:</para>
+			<variablelist>
+				<variable name="BLINDTRANSFERSTATUS">
+					<value name="SUCCESS">
+						Transfer succeeded.
+					</value>
+					<value name="FAILURE">
+						Transfer failed.
+					</value>
+					<value name="INVALID">
+						Transfer invalid.
+					</value>
+					<value name="NOTPERMITTED">
+						Transfer not permitted.
+					</value>
+				</variable>
+			</variablelist>
+		</description>
+	</application>
+ ***/
+
+static const char * const app = "BlindTransfer";
+
+static int blind_transfer_exec(struct ast_channel *chan, const char *data)
+{
+	int res = -1;
+	char *exten = NULL;
+	char *context = NULL;
+	char *parse;
+	AST_DECLARE_APP_ARGS(args,
+		AST_APP_ARG(exten);
+		AST_APP_ARG(context);
+	);
+
+	if (ast_strlen_zero((char *)data)) {
+		ast_log(LOG_WARNING, "%s requires an argument (exten)\n", app);
+		pbx_builtin_setvar_helper(chan, "BLINDTRANSFERSTATUS", "FAILURE");
+		return 0;
+	}
+
+	parse = ast_strdupa(data);
+	AST_STANDARD_APP_ARGS(args, parse);
+
+	exten = args.exten;
+	if (ast_strlen_zero(args.context)) {
+		context = (char *)ast_channel_context(chan);
+	} else {
+		context = args.context;
+	}
+
+	switch (ast_bridge_transfer_blind(1, chan, exten, context, NULL, NULL)) {
+		case AST_BRIDGE_TRANSFER_NOT_PERMITTED:
+			pbx_builtin_setvar_helper(chan, "BLINDTRANSFERSTATUS", "NOTPERMITTED");
+			break;
+		case AST_BRIDGE_TRANSFER_INVALID:
+			pbx_builtin_setvar_helper(chan, "BLINDTRANSFERSTATUS", "INVALID");
+			break;
+		case AST_BRIDGE_TRANSFER_FAIL:
+			pbx_builtin_setvar_helper(chan, "BLINDTRANSFERSTATUS", "FAILURE");
+			break;
+		case AST_BRIDGE_TRANSFER_SUCCESS:
+			pbx_builtin_setvar_helper(chan, "BLINDTRANSFERSTATUS", "SUCCESS");
+			res = 0;
+			break;
+		default:
+			pbx_builtin_setvar_helper(chan, "BLINDTRANSFERSTATUS", "FAILURE");
+        }
+
+	return res;
+}
+
+static int unload_module(void)
+{
+	return ast_unregister_application(app);
+}
+
+static int load_module(void)
+{
+	return ast_register_application_xml(app, blind_transfer_exec);
+}
+
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Blind transfer channel to the given destination");
diff --git a/doc/CHANGES-staging/app_blind_transfer.txt b/doc/CHANGES-staging/app_blind_transfer.txt
new file mode 100644
index 0000000..dc86df0
--- /dev/null
+++ b/doc/CHANGES-staging/app_blind_transfer.txt
@@ -0,0 +1,4 @@
+Subject: BlindTransfer
+
+A new application, this will redirect all channels currently
+bridged to the caller channel to the specified destination.
diff --git a/menuselect/example_menuselect-tree b/menuselect/example_menuselect-tree
index 6901b70..be07fda 100644
--- a/menuselect/example_menuselect-tree
+++ b/menuselect/example_menuselect-tree
@@ -10,6 +10,8 @@
 		</member>
 		<member name="app_authenticate" displayname="Authentication Application" remove_on_change="apps/app_authenticate.o apps/app_authenticate.so">
 		</member>
+		<member name="app_blind_transfer" displayname="Blind transfer by caller channel" remove_on_change="apps/app_blind_transfer.o apps/app_blind_transfer.so">
+		</member>
 		<member name="app_cdr" displayname="Tell Asterisk to not maintain a CDR for the current call" remove_on_change="apps/app_cdr.o apps/app_cdr.so">
 		</member>
 		<member name="app_chanisavail" displayname="Check channel availability" remove_on_change="apps/app_chanisavail.o apps/app_chanisavail.so">
diff --git a/menuselect/test/menuselect-tree b/menuselect/test/menuselect-tree
index 40c08b6..ac69e90 100644
--- a/menuselect/test/menuselect-tree
+++ b/menuselect/test/menuselect-tree
@@ -11,6 +11,8 @@
 </member>
 <member name="app_authenticate" displayname="Authentication Application" remove_on_change="apps/app_authenticate.o apps/app_authenticate.so">
 </member>
+<member name="app_blind_transfer" displayname="Blind transfer by caller channel" remove_on_change="apps/app_blind_transfer.o apps/app_blind_transfer.so">
+</member>
 <member name="app_cdr" displayname="Tell Asterisk to not maintain a CDR for the current call" remove_on_change="apps/app_cdr.o apps/app_cdr.so">
 </member>
 <member name="app_chanisavail" displayname="Check channel availability" remove_on_change="apps/app_chanisavail.o apps/app_chanisavail.so">

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Gerrit-Project: asterisk
Gerrit-Branch: 16
Gerrit-Change-Id: I9d55e7f69ccfd4472dec00d62771d6de8803215a
Gerrit-Change-Number: 11381
Gerrit-PatchSet: 1
Gerrit-Owner: Alexei Gradinari <alex2grad at gmail.com>
Gerrit-MessageType: newchange
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