#include <stdio.h>      /* for printf() */
#include <sys/socket.h> /* for accept() */
#include <arpa/inet.h>  /* for sockaddr_in and inet_ntoa() */

void DieWithError(char *errorMessage);  /* Error handling function */

int AcceptTCPConnection(int servSock)
{
    int clntSock;                    /* Socket descriptor for client */
    struct sockaddr_in echoClntAddr; /* Client address */
    unsigned int clntLen;            /* Length of client address data structure */

    /* Set the size of the in-out parameter */
    clntLen = sizeof(echoClntAddr);
    
    /* Wait for a client to connect */
    if ((clntSock = accept(servSock, (struct sockaddr *) &echoClntAddr, 
           &clntLen)) < 0)
        DieWithError("accept() failed");
    
    /* clntSock is connected to a client! */
    
    printf("Handling client %s\n", inet_ntoa(echoClntAddr.sin_addr));

    return clntSock;
}