main.cpp

//  Main program for router simulation.

#include <iostream>
#include <fstream>
#include <string>
#include <unistd.h>

#include "routerSim.h"
#include "linkedQueue.h"

using namespace std;

int main(int argc, char *argv[])
{

// *****************************************************************
//  Headers...

	string	bars, stars;
	bars.append(65, '-');
	stars.append(65, '*');

	string	routingTableFile;
	string	ipAddressesFile;
	string	routesFile;

	cout << bars << endl << "CS 302 - Assignment #6" << endl;
	cout << endl;

// ----------------------------------------
//  Check command line parameters (one at a time).

	if (argc == 1) {
		cout << "Usage: router -t <ipRoutingTable> -s <sourceIPs>";
		cout << " -o <outputFile>" << endl;
		return 0;
	}

	if (argc != 7) {
		cout << "Error, invalid command line options." << endl;
		return	0;
	}

	if (string(argv[1]) != "-t") {
		cout << "main: Invalid routing table specifier." << endl;
		return 0;
	}

	if (access(argv[2], F_OK) == -1) {
		cout << "main: Error, routing table file does not exist." << endl;
		return	0;
	}
	routingTableFile = string(argv[2]);

	if (string(argv[3]) != "-s") {
		cout << "main: Invalid source IP addresses file specifier." << endl;
		return 0;
	}

	if (access(argv[4], F_OK) == -1) {
		cout << "main: Error, source IP addresses file does not exist." << endl;
		return	0;
	}
	ipAddressesFile = string(argv[4]);

	if (string(argv[5]) != "-o") {
		cout << "main: Invalid output file specifier." << endl;
		return 0;
	}

	if (string(argv[6]) == "") {
		cout << "main: Invalid output file." << endl;
		return 0;
	}
	routesFile = string(argv[6]);

// ----------------------------------------
//  Read routing table and show stats (for reference)

	routerSim	myRouter;

	if (!myRouter.readRoutingTable(routingTableFile)) {
		cout << "main: Error, unable to read rouing file "
			<< routingTableFile << "." << endl;
		return	0;
	}

	myRouter.showTotalRoutesCount();
	myRouter.showTreeNodeCount();
	myRouter.showTreeHeight();

// ----------------------------------------
//  Read input file, create output file

	myRouter.doRouting(ipAddressesFile, routesFile);


// *****************************************************************
//  All done.

	cout << endl << bars << endl;
	cout << "Game Over, thank you for playing." << endl;

	return 0;
}