source: code/branches/tutorial/src/network/PacketGenerator.cc @ 1678

/*
*   ORXONOX - the hottest 3D action shooter ever to exist
*
*
*   License notice:
*
*   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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*
*   Author:
*      Dumeni Manatschal, (C) 2007
*   Co-authors:
*      ...
*
*/

/*
* Class generates packets that can be send by enet
* ->don't read this without the class PacketDecoder, since they belong together
*
* Autor: Dumeni Manatschal
*
*/

#include <iostream>
#include <list>
#include <string>
#include <cstring>

#include "PacketTypes.h"
#include "PacketManager.h"

namespace network
{
  PacketGenerator::PacketGenerator() { }

  //following functions create a packet in form of bytestream

  ENetPacket* PacketGenerator::acknowledgement( int state, int reliable )
  {
    std::cout << "generating new acknowledgement, id: " << state << std::endl;
    ack* ackreq = new ack;
    ackreq->id = ACK;
    ackreq->a = state;

    ENetPacket *packet = enet_packet_create( ackreq , sizeof( *ackreq ), reliable );

    return packet;
  }

  /*### mouseupdates */
  ENetPacket* PacketGenerator::mousem( double x, double y, int reliable )
  {
    std::cout << "generating new mouse" << std::endl;
    mouse* mousemove = new mouse;
    mousemove->id = MOUSE;
    mousemove->x = x;
    mousemove->y = y;

    ENetPacket *packet = enet_packet_create( mousemove , sizeof( *mousemove ), reliable );

    return packet;
  }

  /*### keystrikes updates */
  ENetPacket* PacketGenerator::keystrike( char press, int reliable )
  {
    std::cout << "generating new keyboard" << std::endl;
    keyboard* key = new keyboard;
    key->id = KEYBOARD;
    key->press = press;

    ENetPacket *packet = enet_packet_create( key , sizeof( *key ), reliable );

    return packet;
  }

  /*### chat messages packet */
  ENetPacket* PacketGenerator::chatMessage( const char* message, int reliable )
  {
    int* trans = new int[sizeof(int) + strlen(message) + 1];
    *trans = CHAT;
    //be carefull here, don't forget to allocate the space before using it ;-)
    memcpy( &trans[1], (const void*)message, strlen( message ) + 1);
    ENetPacket *packet = enet_packet_create( trans , sizeof( int ) + strlen( message ) + 1, reliable );

    return packet;
  }

  /*### gamestate packet */
  ENetPacket* PacketGenerator::gstate( GameStateCompressed* states, int reliable )
  {
    //std::cout << "packetgenerator" << std::endl;
    //std::cout << "states->normsize " << states->normsize << std::endl;
    //std::cout << "states->compsize " << states->compsize << std::endl;
    int gid = GAMESTATE; //first assign the correct enet id
    int totalLen = 4*sizeof( int ) + sizeof(bool) + states->compsize; //calculate the total size of the datastream memory
    //std::cout << "totalLen " << totalLen << std::endl;
    unsigned char *data = (unsigned char*)malloc( totalLen ); //allocate the memory for datastream
    memcpy( (void*)(data), (const void*)&gid, sizeof( int ) ); //this is the enet id
    memcpy( (void*)(data+sizeof(int)), (const void*)&(states->id), sizeof(int) ); //the GameStateCompressed id
    memcpy( (void*)(data+2*sizeof(int)), (const void*)&(states->compsize), sizeof(int));
    memcpy( (void*)(data+3*sizeof(int)), (const void*)&(states->normsize), sizeof(int));
    memcpy( (void*)(data+4*sizeof(int)), (const void*)&(states->diffed), sizeof(bool));
    /*(int)*(data) = gid;
    (int)*(data+sizeof(int)) = states->id;
    //this is the compressed size of the GameStateCompressed data, place at 3th position of the enet datastream
    (int)*(data+2*sizeof(int)) = states->compsize;
    //this is the uncompressed size of GameStateCompressed data
    (int)*(data+3*sizeof(int)) = states->normsize;
    //since there is a new parameter inside GameStateCompressed, change this function to create packet
    (bool)*(data+4*sizeof(int)) = states->diffed;*/
    //place the GameStateCompressed data at the end of the enet datastream
    memcpy( (void*)(data+4*sizeof( int ) + sizeof(bool)), (const void*)states->data, states->compsize );
    //create an enet packet with the generated bytestream
    ENetPacket *packet = enet_packet_create( data , totalLen, reliable );
    //delete data;
    return packet;
  }

  ENetPacket* PacketGenerator::clid( int classid, std::string classname, int reliable )
  {
    unsigned char* data = (unsigned char *)malloc(3*sizeof(int)+classname.length()+1);
    std::cout << "classid: " << classid << ", name: " << classname << std::endl;
    *(int *)data = CLASSID;
    *((int *)data+1) = classname.length()+1;
    *((int *)data+2) = classid;
    memcpy( (void *)(data+3*sizeof(int)), classname.c_str(), classname.length()+1);
    ENetPacket *packet = enet_packet_create( data , 3*sizeof(int)+classname.length()+1, reliable );
    return packet;
  }

}