332 lines
9.2 KiB
C
332 lines
9.2 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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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 App to transmit a text message
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*
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* \author Mark Spencer <markster@digium.com>
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* \author Naveen Albert <asterisk@phreaknet.org>
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*
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* \note Requires support of sending text messages from channel driver
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*
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* \ingroup applications
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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#include "asterisk/file.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/app.h"
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#include "asterisk/message.h"
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/*** DOCUMENTATION
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<application name="SendText" language="en_US">
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<synopsis>
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Send a Text Message on a channel.
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</synopsis>
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<syntax>
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<parameter name="text" required="false" />
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</syntax>
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<description>
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<para>Sends <replaceable>text</replaceable> to the current channel.</para>
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<note><para><literal>current channel</literal> could be the caller or callee depending
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on the context in which this application is called.</para></note>
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<para>
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</para>
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<para>The following variables can be set:</para>
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<variablelist>
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<variable name="SENDTEXT_FROM_DISPLAYNAME">
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<para>If set and this channel supports enhanced messaging, this value will be
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used as the <literal>From</literal> display name.</para>
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</variable>
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<variable name="SENDTEXT_TO_DISPLAYNAME">
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<para>If set and this channel supports enhanced messaging, this value will be
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used as the <literal>To</literal> display name.</para>
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</variable>
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<variable name="SENDTEXT_CONTENT_TYPE">
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<para>If set and this channel supports enhanced messaging, this value will be
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used as the message <literal>Content-Type</literal>. If not specified, the
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default of <literal>text/plain</literal> will be used.</para>
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<para><emphasis>Warning:</emphasis> Messages of types other than
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<literal>text/*</literal> cannot be sent via channel drivers that do not
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support Enhanced Messaging. An attempt to do so will be ignored and will result
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in the <literal>SENDTEXTSTATUS</literal> variable being set to
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<literal>UNSUPPORTED</literal>.</para>
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</variable>
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<variable name="SENDTEXT_BODY">
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<para>If set this value will be used as the message body and any text supplied
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as a function parameter will be ignored.
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</para>
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</variable>
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</variablelist>
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<para>
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</para>
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<para>Result of transmission will be stored in the following variables:</para>
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<variablelist>
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<variable name="SENDTEXTTYPE">
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<value name="NONE">
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No message sent.
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</value>
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<value name="BASIC">
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Message body sent without attributes because the channel driver
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doesn't support enhanced messaging.
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</value>
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<value name="ENHANCED">
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The message was sent using enhanced messaging.
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</value>
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</variable>
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<variable name="SENDTEXTSTATUS">
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<value name="SUCCESS">
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Transmission succeeded.
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</value>
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<value name="FAILURE">
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Transmission failed.
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</value>
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<value name="UNSUPPORTED">
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Text transmission not supported by channel.
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</value>
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</variable>
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</variablelist>
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<para>
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</para>
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<note><para>The text encoding and transmission method is completely at the
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discretion of the channel driver. chan_pjsip will use in-dialog SIP MESSAGE
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messages always.</para></note>
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<para>
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</para>
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<para>Examples:
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</para>
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<example title="Send a simple message">
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same => n,SendText(Your Text Here)
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</example>
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<para>If the channel driver supports enhanced messaging (currently only chan_pjsip),
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you can set additional variables:</para>
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<example title="Alter the From display name">
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same => n,Set(SENDTEXT_FROM_DISPLAYNAME=Really From Bob)
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same => n,SendText(Your Text Here)
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</example>
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<example title="Send a JSON String">
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same => n,Set(SENDTEXT_CONTENT_TYPE=text/json)
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same => n,SendText({"foo":a, "bar":23})
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</example>
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<example title="Send a JSON String (alternate)">
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same => n,Set(SENDTEXT_CONTENT_TYPE=text/json)
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same => n,Set(SENDTEXT_BODY={"foo":a, "bar":23})
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same => n,SendText()
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</example>
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</description>
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<see-also>
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<ref type="application">ReceiveText</ref>
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</see-also>
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</application>
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<application name="ReceiveText" language="en_US">
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<since>
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<version>16.24.0</version>
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<version>18.10.0</version>
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<version>19.2.0</version>
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</since>
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<synopsis>
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Receive a Text Message on a channel.
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</synopsis>
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<syntax>
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<parameter name="timeout" required="false">
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<para>Time in seconds to wait for text. Default is 0 (forever).</para>
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</parameter>
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</syntax>
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<description>
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<para>Waits for <replaceable>timeout</replaceable> seconds on the current channel
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to receive text.</para>
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<para>Result of transmission will be stored in the following variables:</para>
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<variablelist>
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<variable name="RECEIVETEXTMESSAGE">
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<para>The received text message.</para>
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</variable>
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<variable name="RECEIVETEXTSTATUS">
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<value name="SUCCESS">
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Transmission succeeded.
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</value>
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<value name="FAILURE">
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Transmission failed or timed out.
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</value>
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</variable>
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</variablelist>
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<example title="Receive message on channel">
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same => n,ReceiveText()
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same => n,NoOp(${RECEIVETEXTMESSAGE})
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</example>
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</description>
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<see-also>
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<ref type="application">SendText</ref>
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</see-also>
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</application>
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***/
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static const char * const app = "SendText";
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static const char * const app2 = "ReceiveText";
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static int sendtext_exec(struct ast_channel *chan, const char *data)
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{
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char *status;
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char *msg_type;
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struct ast_str *str;
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const char *from;
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const char *to;
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const char *content_type;
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const char *body;
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int rc = 0;
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ast_channel_lock(chan);
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from = pbx_builtin_getvar_helper(chan, "SENDTEXT_FROM_DISPLAYNAME");
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to = pbx_builtin_getvar_helper(chan, "SENDTEXT_TO_DISPLAYNAME");
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content_type = pbx_builtin_getvar_helper(chan, "SENDTEXT_CONTENT_TYPE");
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body = S_OR(pbx_builtin_getvar_helper(chan, "SENDTEXT_BODY"), data);
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body = S_OR(body, "");
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if (!(str = ast_str_alloca(strlen(body) + 1))) {
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rc = -1;
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goto cleanup;
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}
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ast_str_get_encoded_str(&str, -1, body);
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body = ast_str_buffer(str);
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msg_type = "NONE";
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status = "UNSUPPORTED";
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if (ast_channel_tech(chan)->send_text_data) {
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struct ast_msg_data *msg;
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struct ast_msg_data_attribute attrs[] =
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{
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{
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.type = AST_MSG_DATA_ATTR_FROM,
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.value = (char *)S_OR(from, ""),
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},
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{
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.type = AST_MSG_DATA_ATTR_TO,
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.value = (char *)S_OR(to, ""),
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},
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{
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.type = AST_MSG_DATA_ATTR_CONTENT_TYPE,
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.value = (char *)S_OR(content_type, ""),
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},
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{
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.type = AST_MSG_DATA_ATTR_BODY,
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.value = (char *)S_OR(body, ""),
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},
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};
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msg_type = "ENHANCED";
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msg = ast_msg_data_alloc(AST_MSG_DATA_SOURCE_TYPE_IN_DIALOG, attrs, ARRAY_LEN(attrs));
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if (msg) {
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if (ast_sendtext_data(chan, msg) == 0) {
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status = "SUCCESS";
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} else {
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status = "FAILURE";
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}
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ast_free(msg);
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} else {
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rc = -1;
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goto cleanup;
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}
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} else if (ast_channel_tech(chan)->send_text) {
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if (!ast_strlen_zero(content_type) && !ast_begins_with(content_type, "text/")) {
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rc = -1;
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goto cleanup;
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}
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msg_type = "BASIC";
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if (ast_sendtext(chan, body) == 0) {
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status = "SUCCESS";
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} else {
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status = "FAILURE";
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}
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}
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pbx_builtin_setvar_helper(chan, "SENDTEXTTYPE", msg_type);
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pbx_builtin_setvar_helper(chan, "SENDTEXTSTATUS", status);
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cleanup:
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pbx_builtin_setvar_helper(chan, "SENDTEXT_FROM_DISPLAYNAME", NULL);
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pbx_builtin_setvar_helper(chan, "SENDTEXT_TO_DISPLAYNAME", NULL);
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pbx_builtin_setvar_helper(chan, "SENDTEXT_CONTENT_TYPE", NULL);
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pbx_builtin_setvar_helper(chan, "SENDTEXT_BODY", NULL);
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ast_channel_unlock(chan);
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return rc;
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}
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static int recvtext_exec(struct ast_channel *chan, const char *data)
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{
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double timeout = 0, timeout_ms = 0;
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char *parse, *buf;
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AST_DECLARE_APP_ARGS(args,
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AST_APP_ARG(timeout);
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);
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parse = ast_strdupa(data);
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AST_STANDARD_APP_ARGS(args, parse);
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if (!ast_strlen_zero(args.timeout)) {
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if (sscanf(args.timeout, "%30lg", &timeout) != 1) {
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ast_log(LOG_WARNING, "Invalid timeout provided: %s. No timeout set.\n", args.timeout);
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return -1;
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}
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timeout_ms = timeout * 1000.0;
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}
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buf = ast_recvtext(chan, timeout_ms);
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pbx_builtin_setvar_helper(chan, "RECEIVETEXTSTATUS", buf ? "SUCCESS" : "FAILURE");
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if (buf) {
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pbx_builtin_setvar_helper(chan, "RECEIVETEXTMESSAGE", buf);
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ast_free(buf);
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}
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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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int res;
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res = ast_unregister_application(app);
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res |= ast_unregister_application(app2);
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return res;
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}
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static int load_module(void)
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{
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int res;
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res = ast_register_application_xml(app, sendtext_exec);
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res |= ast_register_application_xml(app2, recvtext_exec);
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return res;
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Send and Receive Text Applications");
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