Connecting, reading, and parsing network messages.
The target of this exercise was to add the following features to sample 1:
- Create a main loop for the program.
- Call Receive and store the pointer returned in a pointer variable of type Packet.
- Include the header file to use struct Packet
- If a packet arrived, check the first byte of Packet::data. Map this to a connectivity related network enumeration.
- Print out the comment that goes along with the enumeration.
- Deallocate the packet pointer when done with it.
New code over sample 1 is in bold.
#include <stdio.h>
#include <string.h>
#include "RakNetworkFactory.h"
#include "RakPeerInterface.h"
#include "MessageIdentifiers.h"
#define MAX_CLIENTS 10
#define SERVER_PORT 60000
int main(void)
{
char str[512];
RakPeerInterface *peer = RakNetworkFactory::GetRakPeerInterface();
bool isServer;
Packet *packet;
printf("(C) or (S)erver?\n");
gets(str);
if ((str[0]=='c')||(str[0]=='C'))
{
peer->Startup(1,30,&SocketDescriptor(), 1);
isServer = false;
} else {
peer->Startup(MAX_CLIENTS, 30, &SocketDescriptor(SERVER_PORT,0), 1);
isServer = true;
}
if (isServer)
{
printf("Starting the server.\n");
// We need to let the server accept incoming connections from the clients
peer->SetMaximumIncomingConnections(MAX_CLIENTS);
} else {
printf("Enter server IP or hit enter for 127.0.0.1\n");
gets(str);
if (str[0]==0){
strcpy(str, "127.0.0.1");
}
printf("Starting the client.\n");
peer->Connect(str, SERVER_PORT, 0,0);
}
while (1)
{
packet=peer->Receive();
if (packet)
{
switch (packet->data[0])
{
case ID_REMOTE_DISCONNECTION_NOTIFICATION:
printf("Another client has disconnected.\n");
break;
case ID_REMOTE_CONNECTION_LOST:
printf("Another client has lost the connection.\n");
break;
case ID_REMOTE_NEW_INCOMING_CONNECTION:
printf("Another client has connected.\n");
break;
case ID_CONNECTION_REQUEST_ACCEPTED:
printf("Our connection request has been accepted.\n");
break;
case ID_NEW_INCOMING_CONNECTION:
printf("A connection is incoming.\n");
break;
case ID_NO_FREE_INCOMING_CONNECTIONS:
printf("The server is full.\n");
break;
case ID_DISCONNECTION_NOTIFICATION:
if (isServer){
printf("A client has disconnected.\n");
} else {
printf("We have been disconnected.\n");
}
break;
case ID_CONNECTION_LOST:
if (isServer){
printf("A client lost the connection.\n");
} else {
printf("Connection lost.\n");
}
break;
default:
printf("Message with identifier %i has arrived.\n", packet->data[0]);
break;
}
peer->DeallocatePacket(packet);
}
}
RakNetworkFactory::DestroyRakPeerInterface(peer);
return 0;
}
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