Tutorial code sample 4

Tutorial code sample 4
Remote procedure call implementation.

The target of this exercise was to add the following features to sample 3:
Read an array from the client on connection.
Pass that array to the RPC call.
Print that array in the RPC function.
New code over sample 3 is in bold.

#include <stdio.h> // Printf and gets
#include <string.h> // strcpy
#include "RakClientInterface.h"
#include "RakNetworkFactory.h"
#include "RakServerInterface.h"
#include "PacketEnumerations.h"

void PrintMessage(RPCParameters *rpcParams)
{
	printf("%s\n",rpcParameters->input);
}

int main(void)
{
	char str[512];
	RakClientInterface *rakClientInterface;
	RakServerInterface *rakServerInterface;
	Packet *packet;

	printf("(C)lient or (S)erver?\n");
	gets(str);
	if (str[0]=='c' || str[0]=='C')
	{
		rakClientInterface=RakNetworkFactory::GetRakClientInterface();
		rakServerInterface=0;
	}
	else
	{
		rakClientInterface=0;
		rakServerInterface=RakNetworkFactory::GetRakServerInterface();
	}

	if (rakServerInterface)
	{
		// Running in server mode on port 60000
		if (rakServerInterface->Start(32, 0, 0, 60000))
			printf("Starting the server.\n");
		else
			printf("Failed to start the server.\n");

		REGISTER_STATIC_RPC(rakServerInterface, PrintMessage);
	}
	else
	{
		// Running in client mode
		printf("Enter server IP or hit enter for 127.0.0.1\n");
		gets(str);
		// 127.0.0.1 designates the feedback loop so we can test on one computer
		if (str[0]==0)
			strcpy(str, "127.0.0.1");
		if (rakClientInterface->Connect(str, 60000, 0, 0, 0))
			printf("Starting the client.\n");
		else
			printf("Failed to start the client.\n");

		REGISTER_STATIC_RPC(rakClientInterface, PrintMessage);
	}

	while (1)
	{
		if (rakServerInterface)
			packet=rakServerInterface->Receive();
		else
			packet=rakClientInterface->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");
				printf("Enter a string to show on the server: ");
				gets(str);
				// Two tricky things here.  First, you have to remember to send the NULL terminator so you need strlen(str)+1
				// Second, if you didn't read the docs you might not realize RPC takes the number of bits rather than the number of bytes.
				// You have to multiply the number of bytes by 8
				rakClientInterface->RPC("PrintMessage", str, (strlen(str)+1)*8, HIGH_PRIORITY, RELIABLE_ORDERED, 0, false, 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 (rakServerInterface)
					printf("A client has disconnected.\n");
				else
					printf("We have been disconnected.\n");
				break;
			case ID_CONNECTION_LOST:
				if (rakServerInterface)
					printf("A client lost the connection.\n");
				else
					printf("Connection lost.\n");
				break;
			case ID_RECEIVED_STATIC_DATA:
				printf("Got static data.\n");
				break;
			default:
				printf("Message with identifier %i has arrived.\n", packet->data[0]);
				break;
			}

			if (rakServerInterface)
				rakServerInterface->DeallocatePacket(packet);
			else
				rakClientInterface->DeallocatePacket(packet);
		}
	}

	if (rakClientInterface)
		RakNetworkFactory::DestroyRakClientInterface(rakClientInterface);
	else if (rakServerInterface)
		RakNetworkFactory::DestroyRakServerInterface(rakServerInterface);
	return 0;
}