manual/examples/isockad.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <sys/socket.h>
   4 #include <netinet/in.h>
   5 #include <netdb.h>
   6
   7 void
   8 init_sockaddr (struct sockaddr_in *name,
   9                const char *hostname,
  10                uint16_t port)
  11 {
  12   struct hostent *hostinfo;
  13
  14   name->sin_family = AF_INET;
  15   name->sin_port = htons (port);
  16   hostinfo = gethostbyname (hostname);
  17   if (hostinfo == NULL)
  18     {
  19       fprintf (stderr, "Unknown host %s.\n", hostname);
  20       exit (EXIT_FAILURE);
  21     }
  22   name->sin_addr = *(struct in_addr *) hostinfo->h_addr;
  23 }