# Chat room and messaging
[Tutorials:]

This program is a _very_ simple usage example of liblinphone, desmonstrating how to send/receive SIP MESSAGE from a sip uri identity passed from the command line.
Argument must be like sip:jehan@sip.linphone.org .
ex chatroom sip:jehan@sip.linphone.org

    /*
    linphone
    Copyright (C) 2010  Belledonne Communications SARL

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
    */

    #ifdef IN_LINPHONE
    #include "linphonecore.h"
    #else
    #include "linphone/linphonecore.h"
    #endif

    #include <signal.h>

    static bool_t running=TRUE;

    static void stop(int signum){
            running=FALSE;
    }
    void text_received(LinphoneCore *lc, LinphoneChatRoom *room, const LinphoneAddress *from, const char *message) {
            printf(" Message [%s] received from [%s] \n",message,linphone_address_as_string (from));
    }

    LinphoneCore *lc;
    int main(int argc, char *argv[]){
            LinphoneCoreVTable vtable={0};

            char* dest_friend=NULL;

            /* takes   sip uri  identity from the command line arguments */
            if (argc>1){
                    dest_friend=argv[1];
            }

            signal(SIGINT,stop);
    //#define DEBUG
    #ifdef DEBUG
            linphone_core_enable_logs(NULL); /*enable liblinphone logs.*/
    #endif
            /*
             Fill the LinphoneCoreVTable with application callbacks.
             All are optional. Here we only use the text_received callback
             in order to get notifications about incoming message.
             */
            vtable.text_received=text_received;

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

            /*Next step is to create a chat root*/
            LinphoneChatRoom* chat_room = linphone_core_create_chat_room(lc,dest_friend);

            linphone_chat_room_send_message(chat_room,"Hello world"); /*sending message*/

            /* main loop for receiving incoming messages and doing background linphone core work: */
            while(running){
                    linphone_core_iterate(lc);
                    ms_usleep(50000);
            }

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