int main(int argc, char *argv[])
{
int port;
int sock;
char buf[BUFSIZ];
size_t msglen;
struct sockaddr_in saddr;
socklen_t saddrlen;
if (argc == 1 || (port = atoi(argv[1])) <= 0)
{
fprintf(stderr, "usage: dgrecv portnumber\n");
exit(1);
}
if ((sock = make_dgram_server_socket(port)) == -1)
{
oops("cannot make socket", 2);
}
saddrlen = sizeof(saddr);
while ((msglen = recvfrom(sock, buf, BUFSIZ, 0, (struct sockaddr*)&saddr, &saddrlen)) > 0)
{
buf[msglen] = '\0';
printf ("dgrecv: got a message: %s\n", buf);
say_who_called(&saddr);
}
return 0;
}
/****************************************************************************
* * setup() - initialize license server
* */
setup()
{
sd = make_dgram_server_socket(SERVER_PORTNUM);
if ( sd == -1 )
oops("make socket");
free_all_tickets();
return sd;
}