If you have virtual network interfaces for example: eth0, eth0:0, eth0:1, eth0:2, etc
rwhod will broadcast on each one.  When it should only broadcast on the real one.

Fix: In the configure option do a check for ":" in the adapter name.  If there free the
list item and continue to the next.  See code below.  Other fixes would be to
keep a list of network address and not dup them.  This would still broadcast
to different networks on the same wire.  I don't have this problem so I took
the easy way out.

configure(int s)
....
....
      strcpy(np->n_name, ifr->ifr_name);
      co = strchr(np->n_name,':');
      if (co)
        {
          free((char *)np);
          continue;
        }