server_tcp.cpp

#include "common.h"

using namespace std;
 
int main(int argc, char *argv[])
{
    if(argc == 1)
    {
        cout << "Expected execution : ./server port" <<endl;
        return 0;
    }

    int sckt,client,data_len;
    int portNumber = atoi(argv[1]);
    int bufferSize = 1024;
    char buffer[bufferSize];

    struct sockaddr_in server_addr,client_addr;
    socklen_t size;

    sckt = socket(AF_INET, SOCK_STREAM, 0);

    if (sckt < 0)
    {
        perror("Error establishing a socket !!");
        return 0;
    }

    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = htons(INADDR_ANY);
    server_addr.sin_port = htons(portNumber);

    if ((bind(sckt, (struct sockaddr*)&server_addr,sizeof(server_addr))) < 0)
    {
        perror("Error binding the connection !!");
        return 0;
    }

    size = sizeof(server_addr);
    cout << "Waiting for clients to connect..." << endl;

    listen(sckt , 0);
    
    client = accept(sckt,(struct sockaddr *)&client_addr, &size);

    if(client < 0)
    {
        perror("Error accepting the connection..!!");
        return 1;
    }

    cerr << "Connected to client: IP " << inet_ntoa(client_addr.sin_addr) << "  Port :" << client_addr.sin_port << endl;
    data_len = 1;

    while(data_len)
    {
            data_len = recv(client, buffer, bufferSize, 0);

                if(data_len)
                {
                    cout << buffer << endl;
                }
                if(buffer[sizeof(buffer)]==EOF)
                {  
                    close(client);
                    close(sckt);
                    return 0;
                }

            memset(buffer,0,bufferSize);
    }

    cout << "Client disconnected !! Closing the server socket" << endl;

    close(client);
    close(sckt);

}