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// $Id$
// Listens to multicast address. After first message received, will
// listen for 5 more seconds. Prints Mbits/sec received from client.
#include "ace/OS_main.h"
#include "ace/OS_NS_unistd.h"
#include "ace/INET_Addr.h"
#include "ace/SOCK_Dgram_Mcast.h"
#include "ace/Reactor.h"
#include "ace/Get_Opt.h"
#include "ace/Thread_Manager.h"
#include "ace/Service_Config.h"
ACE_RCSID(Ntalker, ntalker, "$Id$")
#if defined (ACE_HAS_IP_MULTICAST)
// Network interface to subscribe to. This is hardware specific. use
// netstat(1M) to find whether your interface is le0 or ie0
static const ACE_TCHAR *INTERFACE = 0;
static const char *MCAST_ADDR = ACE_DEFAULT_MULTICAST_ADDR;
static const u_short UDP_PORT = ACE_DEFAULT_MULTICAST_PORT;
class Handler : public ACE_Event_Handler
{
// = TITLE
// Handle both multicast and stdin events.
public:
// = Initialization and termination methods.
Handler (u_short udp_port,
const char *ip_addr,
const ACE_TCHAR *a_interface,
ACE_Reactor & );
// Constructor.
~Handler (void);
// Destructor.
// Event demuxer hooks.
virtual int handle_input (ACE_HANDLE);
virtual int handle_close (ACE_HANDLE,
ACE_Reactor_Mask);
virtual ACE_HANDLE get_handle (void) const;
private:
ACE_SOCK_Dgram_Mcast mcast_;
// Multicast wrapper.
};
ACE_HANDLE
Handler::get_handle (void) const
{
return this->mcast_.get_handle ();
}
int
Handler::handle_input (ACE_HANDLE h)
{
char buf[BUFSIZ];
if (h == ACE_STDIN)
{
ssize_t result = ACE_OS::read (h, buf, BUFSIZ);
if (result > 0)
{
if (this->mcast_.send (buf, result) != result)
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"send error"),
-1);
return 0;
}
else if (result == -1)
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"can't read from STDIN"),
-1);
else // result == 0
{
ACE_Reactor::end_event_loop ();
return -1;
}
}
else
{
ACE_INET_Addr remote_addr;
// Receive message from multicast group.
ssize_t result = this->mcast_.recv (buf,
sizeof buf,
remote_addr);
if (result != -1)
{
ACE_DEBUG ((LM_DEBUG,
"received datagram from host %s on port %d bytes = %d\n",
remote_addr.get_host_name (),
remote_addr.get_port_number (),
result));
ACE_OS::write (ACE_STDERR, buf, result);
ACE_DEBUG ((LM_DEBUG,
"\n"));
return 0;
}
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"something amiss"),
-1);
}
}
int
Handler::handle_close (ACE_HANDLE h, ACE_Reactor_Mask)
{
if (h == ACE_STDIN)
{
ACE_DEBUG ((LM_DEBUG,
"STDIN_Events handle removed from reactor.\n"));
if (ACE_Reactor::instance ()->remove_handler
(this, ACE_Event_Handler::READ_MASK) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"remove_handler"),
-1);
}
else
ACE_DEBUG ((LM_DEBUG,
"Mcast_Events handle removed from reactor.\n"));
return 0;
}
Handler::~Handler (void)
{
if (this->mcast_.unsubscribe () == -1)
ACE_ERROR ((LM_ERROR,
"%p\n",
"unsubscribe fails"));
}
Handler::Handler (u_short udp_port,
const char *ip_addr,
const ACE_TCHAR *a_interface,
ACE_Reactor &reactor)
{
// Create multicast address to listen on.
ACE_INET_Addr sockmc_addr (udp_port, ip_addr);
// subscribe to multicast group.
if (this->mcast_.subscribe (sockmc_addr, 1, a_interface) == -1)
{
ACE_ERROR ((LM_ERROR,
"%p\n",
"can't subscribe to multicast group"));
}
// Disable loopbacks.
// if (this->mcast_.set_option (IP_MULTICAST_LOOP, 0) == -1 )
// ACE_OS::perror (" can't disable loopbacks " ), ACE_OS::exit (1);
// Register callbacks with the ACE_Reactor.
else if (reactor.register_handler (this->mcast_.get_handle (),
this,
ACE_Event_Handler::READ_MASK) == -1)
ACE_ERROR ((LM_ERROR,
"%p\n",
"can't register with Reactor\n"));
// Register the STDIN handler.
else if (ACE_Event_Handler::register_stdin_handler (this,
ACE_Reactor::instance (),
ACE_Thread_Manager::instance ()) == -1)
ACE_ERROR ((LM_ERROR,
"%p\n",
"register_stdin_handler"));
}
static void
parse_args (int argc, ACE_TCHAR *argv[])
{
ACE_Get_Opt get_opt (argc, argv, ACE_TEXT("i:u"));
int c;
while ((c = get_opt ()) != -1)
switch (c)
{
case 'i':
INTERFACE = get_opt.opt_arg ();
break;
case 'u':
// Usage fallthrough.
default:
ACE_DEBUG ((LM_DEBUG,
"%s -i interface\n",
argv[0]));
ACE_OS::exit (1);
}
}
int
ACE_TMAIN (int argc, ACE_TCHAR *argv[])
{
parse_args (argc, argv);
Handler handler (UDP_PORT,
MCAST_ADDR,
INTERFACE,
*ACE_Reactor::instance ());
// Run the event loop.
ACE_Reactor::run_event_loop ();
ACE_DEBUG ((LM_DEBUG,
"talker Done.\n"));
return 0;
}
#else
int
ACE_TMAIN (int, ACE_TCHAR *argv[])
{
ACE_ERROR_RETURN ((LM_ERROR,
"error: %s must be run on a platform that support IP multicast\n",
argv[0]),
0);
}
#endif /* ACE_HAS_IP_MULTICAST */
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