| #include <stdio.h> |
| #include <errno.h> |
| #include <stdlib.h> |
| #include <sys/socket.h> |
| #include <sys/un.h> |
| |
| #define SERVER "/tmp/serversocket" |
| #define MAXMSG 512 |
| |
| int |
| main (void) |
| { |
| int sock; |
| char message[MAXMSG]; |
| struct sockaddr_un name; |
| size_t size; |
| int nbytes; |
| |
| /* Remove the filename first, it's ok if the call fails */ |
| unlink (SERVER); |
| |
| /* Make the socket, then loop endlessly. */ |
| sock = make_named_socket (SERVER); |
| while (1) |
| { |
| /* Wait for a datagram. */ |
| size = sizeof (name); |
| nbytes = recvfrom (sock, message, MAXMSG, 0, |
| (struct sockaddr *) & name, &size); |
| if (nbytes < 0) |
| { |
| perror ("recfrom (server)"); |
| exit (EXIT_FAILURE); |
| } |
| |
| /* Give a diagnostic message. */ |
| fprintf (stderr, "Server: got message: %s\n", message); |
| |
| /* Bounce the message back to the sender. */ |
| nbytes = sendto (sock, message, nbytes, 0, |
| (struct sockaddr *) & name, size); |
| if (nbytes < 0) |
| { |
| perror ("sendto (server)"); |
| exit (EXIT_FAILURE); |
| } |
| } |
| } |