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// Server.C
// $Id$
//
// listens to multicast address. after first message received, will
// listen for 5 more seconds. prints Mbits/sec received from client
#include "ace/INET_Addr.h"
#include "ace/SOCK_Dgram_Mcast.h"
#include "ace/Reactor.h"
#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 char *interface = "le0";
static const char *MCAST_ADDR = ACE_DEFAULT_MULTICAST_ADDR;
static const u_short UDP_PORT = ACE_DEFAULT_MULTICAST_PORT;
// Handle both multicast and stdin events.
class Handle_Events : public ACE_Event_Handler
{
public:
Handle_Events (u_short udp_port,
const char *ip_addr,
const char *interface,
ACE_Reactor &reactor);
~Handle_Events (void);
virtual int handle_input (ACE_HANDLE);
virtual int handle_close (ACE_HANDLE, ACE_Reactor_Mask);
private:
ACE_SOCK_Dgram_Mcast mcast_;
ACE_Handle_Set handle_set_;
};
int
Handle_Events::handle_input (ACE_HANDLE h)
{
char buf[BUFSIZ];
if (h == 0)
{
int readresult = ACE_OS::read (h, buf, BUFSIZ);
if (readresult > 0)
{
if (this->mcast_.send (buf, readresult) != readresult)
{
ACE_OS::perror ("send error");
return -1;
}
return 0;
}
else if (readresult == -1)
::perror ("can't read from STDIN");
return -1;
}
else
{
ACE_INET_Addr remote_addr;
// receive message from multicast group
int retcode = this->mcast_.recv (buf, sizeof buf, remote_addr);
if (retcode != -1)
{
cout << "received datagram from host " << remote_addr.get_host_name ()
<< " on port " << remote_addr.get_port_number ()
<< " bytes = " << retcode << endl;
ACE_OS::write (ACE_STDOUT, buf, retcode);
cout << endl;
return 0;
}
ACE_OS::perror ("Something amiss.");
return -1;
}
}
int
Handle_Events::handle_close (ACE_HANDLE h, ACE_Reactor_Mask)
{
if (h == 0)
cout << "STDIN_Events handle removed from reactor." << endl << flush;
else
cout << "Mcast_Events handle removed from reactor." << endl << flush;
return 0;
}
Handle_Events::~Handle_Events (void)
{
// ACE_OS::exit on error (bogus)...
if (this->mcast_.unsubscribe () == -1)
ACE_OS::perror ("unsubscribe fails"), ACE_OS::exit (1);
}
Handle_Events::Handle_Events (u_short udp_port,
const char *ip_addr,
const char *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, interface) == -1)
ACE_OS::perror ("can't subscribe to multicast group"), ACE_OS::exit (1);
// disable loopbacks
// if (this->mcast_.set_option (IP_MULTICAST_LOOP, 0) == -1 )
// ACE_OS::perror (" can't disable loopbacks " ), ACE_OS::exit (1);
this->handle_set_.set_bit (0);
this->handle_set_.set_bit (this->mcast_.get_handle ());
// Register callbacks with the ACE_Reactor.
if (reactor.register_handler (this->handle_set_,
this,
ACE_Event_Handler::READ_MASK) == -1)
ACE_OS::perror ("can't register events"), ACE_OS::exit (1);
}
static void
parse_args (int argc, char *argv[])
{
extern char *optarg;
extern int optind;
int c;
while ((c = ACE_OS::getopt (argc, argv, "i:u")) != -1)
switch (c)
{
case 'i':
interface = optarg;
break;
case 'u':
// usage fallthrough
default:
cerr << argv[0] << " -i interface\n";
::exit (1);
}
}
static sig_atomic_t done = 0;
// Signal handler.
static void
handler (int)
{
done = 1;
}
int
main (int argc, char *argv[])
{
ACE_Sig_Action sig ((ACE_SignalHandler) handler, SIGINT);
parse_args (argc, argv);
ACE_Reactor reactor;
Handle_Events handle_events (UDP_PORT, MCAST_ADDR, interface, reactor);
// main loop
while (!done)
reactor.handle_events ();
cout << "\ntalker Done.\n";
return 0;
}
#else
int
main (int argc, char *argv[])
{
ACE_ERROR ((LM_ERROR, "error: %s must be run on a platform that support IP multicast\n",
argv[0]));
return 0;
}
#endif /* ACE_HAS_IP_MULTICAST */
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