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// $Id$
#include "ace/SOCK_Dgram_Bcast.h"
#include "ace/INET_Addr.h"
static const u_short PORT = ACE_DEFAULT_SERVER_PORT;
int
main (int argc,char *argv[])
{
ACE_UNUSED_ARG(argc);
ACE_UNUSED_ARG(argv);
ACE_INET_Addr local ((u_short) 0);
/* Instead of creating the ACE_SOCK_Dgram we created last time,
we'll create an ACE_SOCK_Dgram_Bcast. "Bcast" means, of course,
"Broadcast". This ACE object is clever enough to go out to the OS
and find all of the network interfaces. When you send() on a
Dgram_Bcast, it will send the datagram out on all of those
interfaces. This is quiet handy if you do it on a multi-homed
host that plays router... */
ACE_SOCK_Dgram_Bcast dgram;
if (dgram.open (local) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"datagram open"),
-1);
char buf[BUFSIZ];
sprintf (buf, "Hello World!");
/* The only other difference between us and the directed client is
that we don't specify a host to receive the datagram. Instead, we
use the magic value "INADDR_BROADCAST". All hosts are obliged to
respond to datagrams directed to this address the same as they
would to datagrams sent to their hostname.
Remember, the Dgram_Bcast will send a datagram to all interfaces
on the host. That's true even if the address is for a specific
host (and the host address makes sense for the interface). The
real power is in using an INADDR_BROADCAST addressed datagram
against all interfaces. */
ACE_INET_Addr remote (PORT,
INADDR_BROADCAST);
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) Sending (%s) to the server.\n",
buf));
if (dgram.send (buf,
ACE_OS::strlen (buf) + 1,
remote) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"send"),
-1);
if (dgram.recv (buf,
sizeof (buf),
remote) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"recv"),
-1);
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) The server said: %s\n",
buf));
/* Using the "remote" object instance, find out where the server
lives. We could then save this address and use directed datagrams
to chat with the server for a while. */
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) The server can be found at: (%s:%d)\n",
remote.get_host_name(),
PORT));
return 0;
}
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