Real Time Text Receiver

This program is able to receive chat message in real time on port 5060. More...

This program is able to receive chat message in real time on port 5060.

Use realtimetext_sender to generate chat message usage: ./realtimetext_receiver

/*
 * Copyright (c) 2010-2022 Belledonne Communications SARL.
 *
 * This file is part of Liblinphone
 * (see https://gitlab.linphone.org/BC/public/liblinphone).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "linphone/core.h"

#include <signal.h>

static bool_t running = TRUE;

static void stop(int signum) {
        running = FALSE;
}

int main(int argc, char *argv[]) {
        LinphoneCoreVTable vtable = {0};
        LinphoneCore *lc;
        LinphoneCall *call = NULL;
        LinphoneChatRoom *chat_room;
        LinphoneChatMessage *chat_message = NULL;
        const char *dest = NULL;
        LCSipTransports tp;
        tp.udp_port = LC_SIP_TRANSPORT_RANDOM;
        tp.tcp_port = LC_SIP_TRANSPORT_RANDOM;
        tp.tls_port = LC_SIP_TRANSPORT_RANDOM;

        /* take the destination sip uri from the command line arguments */
        if (argc > 1) {
                dest = argv[1];
        }

        signal(SIGINT, stop);

#ifdef DEBUG_LOGS
        linphone_core_enable_logs(NULL); /*enable liblinphone logs.*/
#endif

        /*
         Instanciate a LinphoneCore object given the LinphoneCoreVTable
        */
        lc = linphone_core_new(&vtable, NULL, NULL, NULL);

        linphone_core_set_sip_transports(lc, &tp); /*to avoid port colliding with receiver*/
        if (dest) {
                /*
                 Place an outgoing call with rtt enabled
                */
                LinphoneCallParams *cp = linphone_core_create_call_params(lc, NULL);
                linphone_call_params_enable_realtime_text(cp, TRUE); /*enable real time text*/
                call = linphone_core_invite_with_params(lc, dest, cp);
                linphone_call_params_unref(cp);
                if (call == NULL) {
                        printf("Could not place call to %s\n", dest);
                        goto end;
                } else printf("Call to %s is in progress...", dest);
                linphone_call_ref(call);
        }
        /*wait for call to be established*/
        while (running && (linphone_call_get_state(call) == LinphoneCallOutgoingProgress ||
                           linphone_call_get_state(call) == LinphoneCallOutgoingInit)) {
                linphone_core_iterate(lc);
                ms_usleep(50000);
        }
        /*check if call is established*/
        switch (linphone_call_get_state(call)) {
                case LinphoneCallError:
                case LinphoneCallReleased:
                case LinphoneCallEnd:
                        printf("Could not place call to %s\n", dest);
                        goto end;
                        break;
                default:
                        break;
                        /*continue*/
        }

        chat_room = linphone_call_get_chat_room(call); /*create a chat room associated to this call*/

        /* main loop for sending message and doing background linphonecore work: */
        while (running) {
                int character;
                /*to disable terminal buffering*/
                if (system("/bin/stty raw") == -1) {
                        ms_error("/bin/stty error");
                }
                character = getchar();
                if (system("/bin/stty cooked") == -1) {
                        ms_error("/bin/stty error");
                }
                if (character == 0x03) { /*CTRL C*/
                        running = 0;
                        break;
                }
                if (character != EOF) {
                        /* user has typed something*/
                        if (chat_message == NULL) {
                                /*create a new message*/
                                chat_message = linphone_chat_room_create_message(chat_room, ""); /*create an empty message*/
                        }
                        if (character == '\r') {
                                /*new line, committing message*/
                                linphone_chat_room_send_chat_message(chat_room, chat_message);
                                chat_message = NULL; /*reset message*/
                        } else {
                                linphone_chat_message_put_char(chat_message, character); /*send char in realtime*/
                        }
                }
                linphone_core_iterate(lc);
                ms_usleep(50000);
        }
        if (call && linphone_call_get_state(call) != LinphoneCallEnd) {
                /* terminate the call */
                printf("Terminating the call...\n");
                linphone_core_terminate_call(lc, call);
                /*at this stage we don't need the call object */
                linphone_call_unref(call);
        }

end:
        printf("Shutting down...\n");
        linphone_core_destroy(lc);
        printf("Exited\n");
        return 0;
}