res_pjsip_one_touch_record_info.c

Go to the documentation of this file.

/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2013, malleable, llc.
 *
 * Sean Bright <sean@malleable.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.
 */
 
/*** MODULEINFO
     <depend>pjproject</depend>
     <depend>res_pjsip</depend>
     <depend>res_pjsip_session</depend>
     <support_level>core</support_level>
***/
 
#include "asterisk.h"
 
#include <pjsip.h>
#include <pjsip_ua.h>
 
#include "asterisk/features.h"
#include "asterisk/res_pjsip.h"
#include "asterisk/res_pjsip_session.h"
#include "asterisk/module.h"
#include "asterisk/features_config.h"
 
static void send_response(struct ast_sip_session *session, int code, struct pjsip_rx_data *rdata)
{
    pjsip_tx_data *tdata;
 
    if (pjsip_dlg_create_response(session->inv_session->dlg, rdata, code, NULL, &tdata) == PJ_SUCCESS) {
        struct pjsip_transaction *tsx = pjsip_rdata_get_tsx(rdata);
 
        pjsip_dlg_send_response(session->inv_session->dlg, tsx, tdata);
    }
}
 
static int handle_incoming_request(struct ast_sip_session *session, struct pjsip_rx_data *rdata)
{
    static const pj_str_t rec_str = { "Record", 6 };
    pjsip_generic_string_hdr *record;
    int feature_res;
    char feature_code[AST_FEATURE_MAX_LEN];
    const char *feature;
    char *digit;
 
    record = pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &rec_str, NULL);
 
    /* If we don't have Record header, we have nothing to do */
    if (!record) {
        return 0;
    }
 
    if (!pj_stricmp2(&record->hvalue, "on")) {
        feature = session->endpoint->info.recording.onfeature;
    } else if (!pj_stricmp2(&record->hvalue, "off")) {
        feature = session->endpoint->info.recording.offfeature;
    } else {
        /* Don't send response because another module may handle this */
        return 0;
    }
 
    if (!session->channel) {
        send_response(session, 481, rdata);
        return 1;
    }
 
    /* Is this endpoint configured with One Touch Recording? */
    if (!session->endpoint->info.recording.enabled || ast_strlen_zero(feature)) {
        send_response(session, 403, rdata);
        return 1;
    }
 
    ast_channel_lock(session->channel);
    feature_res = ast_get_feature(session->channel, feature, feature_code, sizeof(feature_code));
    ast_channel_unlock(session->channel);
 
    if (feature_res || ast_strlen_zero(feature_code)) {
        send_response(session, 403, rdata);
        return 1;
    }
 
    for (digit = feature_code; *digit; ++digit) {
        struct ast_frame f = { AST_FRAME_DTMF, .subclass.integer = *digit, .len = 100 };
        ast_queue_frame(session->channel, &f);
    }
 
    send_response(session, 200, rdata);
 
    return 1;
}
 
static struct ast_sip_session_supplement info_supplement = {
    .method = "INFO",
    .priority = AST_SIP_SUPPLEMENT_PRIORITY_FIRST,
    .incoming_request = handle_incoming_request,
};
 
static int load_module(void)
{
    ast_sip_session_register_supplement(&info_supplement);
 
    return AST_MODULE_LOAD_SUCCESS;
}
 
static int unload_module(void)
{
    ast_sip_session_unregister_supplement(&info_supplement);
    return 0;
}
 
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP INFO One Touch Recording Support",
    .support_level = AST_MODULE_SUPPORT_CORE,
    .load = load_module,
    .unload = unload_module,
    .load_pri = AST_MODPRI_APP_DEPEND,
    .requires = "res_pjsip,res_pjsip_session",
);