app_cdr.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 1999 - 2005, Digium, Inc.
 *
 * Martin Pycko <martinp@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 Applications connected with CDR engine
 *
 * \author Martin Pycko <martinp@digium.com>
 *
 * \ingroup applications
 */
 
/*** MODULEINFO
    <support_level>core</support_level>
 ***/
 
#include "asterisk.h"
 
#include "asterisk/channel.h"
#include "asterisk/module.h"
#include "asterisk/app.h"
#include "asterisk/stasis.h"
#include "asterisk/stasis_message_router.h"
 
/*** DOCUMENTATION
    <application name="ResetCDR" language="en_US">
        <synopsis>
            Resets the Call Data Record.
        </synopsis>
        <syntax>
            <parameter name="options">
                <optionlist>
                    <option name="v">
                        <para>Save the CDR variables during the reset.</para>
                    </option>
                </optionlist>
            </parameter>
        </syntax>
        <description>
            <para>This application causes the Call Data Record to be reset.
            Depending on the flags passed in, this can have several effects.
            With no options, a reset does the following:</para>
            <para>1. The <literal>start</literal> time is set to the current time.</para>
            <para>2. If the channel is answered, the <literal>answer</literal> time is set to the
            current time.</para>
            <para>3. All variables are wiped from the CDR. Note that this step
            can be prevented with the <literal>v</literal> option.</para>
        </description>
        <see-also>
            <ref type="application">ForkCDR</ref>
            <ref type="function">CDR_PROP</ref>
        </see-also>
    </application>
 ***/
 
static const char resetcdr_app[] = "ResetCDR";
 
enum reset_cdr_options {
    OPT_DISABLE_DISPATCH = (1 << 0),
    OPT_KEEP_VARS = (1 << 1),
    OPT_ENABLE = (1 << 2),
};
 
AST_APP_OPTIONS(resetcdr_opts, {
    AST_APP_OPTION('v', AST_CDR_FLAG_KEEP_VARS),
});
 
STASIS_MESSAGE_TYPE_DEFN_LOCAL(appcdr_message_type);
 
/*! \internal \brief Payload for the Stasis message sent to manipulate a CDR */
struct app_cdr_message_payload {
    /*! The name of the channel to be manipulated */
    const char *channel_name;
    /*! Reset the CDR */
    unsigned int reset:1;
    /*! If reseting the CDR, keep the variables */
    unsigned int keep_variables:1;
};
 
static void appcdr_callback(void *data, struct stasis_subscription *sub, struct stasis_message *message)
{
    struct app_cdr_message_payload *payload;
 
    if (stasis_message_type(message) != appcdr_message_type()) {
        return;
    }
 
    payload = stasis_message_data(message);
    if (!payload) {
        return;
    }
 
    if (payload->reset) {
        if (ast_cdr_reset(payload->channel_name, payload->keep_variables)) {
            ast_log(AST_LOG_WARNING, "Failed to reset CDRs on channel %s\n", payload->channel_name);
        }
    }
}
 
static int publish_app_cdr_message(struct ast_channel *chan, struct app_cdr_message_payload *payload)
{
    RAII_VAR(struct stasis_message *, message, NULL, ao2_cleanup);
    RAII_VAR(struct stasis_message_router *, router, ast_cdr_message_router(), ao2_cleanup);
 
    if (!router) {
        ast_log(AST_LOG_WARNING, "Failed to manipulate CDR for channel %s: no message router\n",
            ast_channel_name(chan));
        return -1;
    }
 
    message = stasis_message_create(appcdr_message_type(), payload);
    if (!message) {
        ast_log(AST_LOG_WARNING, "Failed to manipulate CDR for channel %s: unable to create message\n",
            payload->channel_name);
        return -1;
    }
    stasis_message_router_publish_sync(router, message);
 
    return 0;
}
 
static int resetcdr_exec(struct ast_channel *chan, const char *data)
{
    RAII_VAR(struct app_cdr_message_payload *, payload,
        ao2_alloc(sizeof(*payload), NULL), ao2_cleanup);
    char *args;
    struct ast_flags flags = { 0 };
 
    if (!payload) {
        return -1;
    }
 
    if (!ast_strlen_zero(data)) {
        args = ast_strdupa(data);
        ast_app_parse_options(resetcdr_opts, &flags, NULL, args);
    }
 
    payload->channel_name = ast_channel_name(chan);
    payload->reset = 1;
 
    if (ast_test_flag(&flags, AST_CDR_FLAG_KEEP_VARS)) {
        payload->keep_variables = 1;
    }
 
    return publish_app_cdr_message(chan, payload);
}
 
static int unload_module(void)
{
    RAII_VAR(struct stasis_message_router *, router, ast_cdr_message_router(), ao2_cleanup);
 
    if (router) {
        stasis_message_router_remove(router, appcdr_message_type());
    }
    STASIS_MESSAGE_TYPE_CLEANUP(appcdr_message_type);
    ast_unregister_application(resetcdr_app);
    return 0;
}
 
static int load_module(void)
{
    RAII_VAR(struct stasis_message_router *, router, ast_cdr_message_router(), ao2_cleanup);
    int res = 0;
 
    if (!router) {
        return AST_MODULE_LOAD_DECLINE;
    }
 
    res |= STASIS_MESSAGE_TYPE_INIT(appcdr_message_type);
    res |= ast_register_application_xml(resetcdr_app, resetcdr_exec);
    res |= stasis_message_router_add(router, appcdr_message_type(), appcdr_callback, NULL);
 
    if (res) {
        unload_module();
        return AST_MODULE_LOAD_DECLINE;
    }
    return AST_MODULE_LOAD_SUCCESS;
}
 
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Tell Asterisk to not maintain a CDR for the current call");