(6 marks). Consider the following TCP server program. int main(int argc, char argv ) \{ int listenfd, connfd; pid_t childpid; socklen_t clilen; struct sockaddr_in cliaddr, servaddr; listenfd = Socket(AF_INET, SOCK_STREAM, 0); bzero(\&servaddr, sizeof(servaddr)); servaddr.sin_family =AF_INET; servaddr.sin_addr.s_addr = htonl(INADDR_ANY); servaddr.sin_port htons(SERV_PORT ); Bind(listenfd, (SA *) \&servaddr, sizeof(servaddr)); Listen(listenfd, LISTENQ); for (;;){ connfd = Accept(listenfd, NULL, NULL); if (( childpid = Fork 0)==0){/ child process / Close(listenfd); / close listening socket */ str_echo(connfd); / process the request */ exit(0) 3 Close(connfd); / parent closes connected socket / 3 \} Explain how to modify the program to print the client's hostname and port number. YOU DO NOT NEED TO WRITE THE CODE FOR YOUR SOLUTION. However, you must explicitly state the functions/system calls and how to use them to print the hostname. (6 marks). Consider the following TCP server program. int main(int argc, char argv ) \{ int listenfd, connfd; pid_t childpid; socklen_t clilen; struct sockaddr_in cliaddr, servaddr; listenfd = Socket(AF_INET, SOCK_STREAM, 0); bzero(\&servaddr, sizeof(servaddr)); servaddr.sin_family =AF_INET; servaddr.sin_addr.s_addr = htonl(INADDR_ANY); servaddr.sin_port htons(SERV_PORT ); Bind(listenfd, (SA *) \&servaddr, sizeof(servaddr)); Listen(listenfd, LISTENQ); for (;;){ connfd = Accept(listenfd, NULL, NULL); if (( childpid = Fork 0)==0){/ child process / Close(listenfd); / close listening socket */ str_echo(connfd); / process the request */ exit(0) 3 Close(connfd); / parent closes connected socket / 3 \} Explain how to modify the program to print the client's hostname and port number. YOU DO NOT NEED TO WRITE THE CODE FOR YOUR SOLUTION. However, you must explicitly state the functions/system calls and how to use them to print the hostname