Replying to a client over sockets (UDP) from a different process

Question

I have a server than is a \"command handler\" process. It receives messages over UDP, and delegates the work to do to a different process by communicating to that process throu

Answer 1

You should be testing for the error return, something like

if((nsfd = socket (AF_INET, SOCK_DGRAM, IPROTO_UDP)) < 0} {
    perror("at socket open");
    // I'd call exit here, probably
}
if(sendto(nsfd, buff, bread, 0, &addr, sizeof(addr) < 0){
    perror("At sendto");
}

There's a nice tutorial example here.