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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_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[512];
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,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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