Tutorial code sample 3

Remote procedure call setup.
The target of this exercise was to add the following features to sample 2:

1. Implement code to handle ID_RECEIVED_STATIC_DATA
2. Implement an RPC header called "PrintMessage". Have it print "Hello world." Both the client and server should be able to call it.
3. When the client successfully connects, call the RPC function.

New code over sample 2 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

    void PrintMessage(RPCParameters *rpcParameters)
    {
    	printf("Hello World!\n");
    }

    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);
    	}

    	REGISTER_STATIC_RPC(peer, PrintMessage);

    	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");

    				peer->RPC("PrintMessage",0,0,HIGH_PRIORITY, RELIABLE_ORDERED, 0, UNASSIGNED_SYSTEM_ADDRESS, true, 0, UNASSIGNED_NETWORK_ID, 0);

    				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;
    }