source: code/branches/FICN/src/network/PacketGenerator.cc @ 340

/*
 *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 "PacketManager.h"
#include "enet/enet.h"
#include <iostream>
#include <list>
#include <string>
#include <cstring>

using namespace std;
using namespace network;

PacketGenerator::PacketGenerator() {}

//following functions create a packet in form of bytestream

ENetPacket* PacketGenerator::acknowledgement( int state, int reliable )
{
        cout << "generating new acknowledgement" << 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 )
{
        cout << "generating new mouse" << 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 )
{
        cout << "generating new keyboard" << 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( GameState* states, int reliable )
{
        int* gid; *gid = GAMESTATE; //first assign the correct enet id
        int totalLen = 3*sizeof( int ) + states->size; //calculate the total size of the datastream memory
        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 gamestate id
        //this is the size of the gamestate data, place at 3th position of the enet datastream
        memcpy( (void*)(data+2*sizeof(int)), (const void*)&(states->size), sizeof(int)); 
        //place the gamestate data at the end of the enet datastream
        memcpy( (void*)(data+3*sizeof( int )), (const void*)states->data, states->size );
        //create an enet packet with the generated bytestream
        ENetPacket *packet = enet_packet_create( data , totalLen, reliable );
        
        return packet;
}