source: network-game/client/Client/main.cpp@ e08572c

#include "../../common/compiler.h"

#include <sys/types.h>

#if defined WINDOWS
        #include <winsock2.h>
        #include <WS2tcpip.h>
#elif defined LINUX
        #include <sys/types.h>
        #include <unistd.h>
        #include <sys/socket.h>
        #include <netinet/in.h>
        #include <netdb.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string>

#include <iostream>

#include <boost/lambda/lambda.hpp>

#include "../../common/message.h"

#ifdef WINDOWS
        #pragma comment(lib, "ws2_32.lib")
#endif

using namespace std;

void error(const char *);

int main(int argc, char *argv[])
{
        int sock, n;
        struct sockaddr_in server, from;
        struct hostent *hp;
        char buffer[256];
        NETWORK_MSG msgTo, msgFrom;

        if (argc != 3) {
                cout << "Usage: server port" << endl;
                exit(1);
        }

        WORD wVersionRequested;
        WSADATA wsaData;
        int wsaerr;

        wVersionRequested = MAKEWORD(2, 2);
        wsaerr = WSAStartup(wVersionRequested, &wsaData);
        
        if (wsaerr != 0) {
                cout << "The Winsock dll not found." << endl;
                exit(1);
        }else
                cout << "The Winsock dll was found." << endl;
        
        sock= socket(AF_INET, SOCK_DGRAM, 0);
        if (sock < 0)
                error("socket");

        server.sin_family = AF_INET;
        hp = gethostbyname(argv[1]);
        if (hp==0)
                error("Unknown host");

        memcpy((char *)&server.sin_addr, (char *)hp->h_addr, hp->h_length);
        server.sin_port = htons(atoi(argv[2]));

        strcpy(msgTo.buffer, "Hello");
        n=sendMessage(&msgTo, sock, &server);
        if (n < 0)
                error("sendMessage");

        n = receiveMessage(&msgFrom, sock, &from);
        if (n < 0)
                error("receiveMessage");
        
        cout << msgFrom.buffer << endl;

        while(true) {
                cout << "Please enter a message (or q to quit): ";
                cin.getline(msgTo.buffer, 256);
                
                if (strcmp(msgTo.buffer, "q") == 0) {
                        break;
                }

                n=sendMessage(&msgTo, sock, &server);
                if (n < 0)
                        error("sendMessage");

                n = receiveMessage(&msgFrom, sock, &from);
                if (n < 0)
                        error("receiveMessage");
        
                cout << msgFrom.buffer << endl;
        }

        closesocket(sock);

        WSACleanup();

        cout << "Thank you for playing!" << endl;
        getchar();

        return 0;
}

// need to make a function like this that works on windows
void error(const char *msg)
{
    perror(msg);
        WSACleanup();
    exit(1);
}