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|
// $Id$
// Exercise the <ACE_SOCK_CODgram> wrapper along with the
// <ACE_Reactor>. This test simply ping-pongs datagrams back and
// forth between the peer1 and peer2 processes. This test can
// be run in two ways:
//
// 1. Stand-alone -- e.g.,
//
// % ./CODgram
//
// which will spawn a child process and run peer1 and peer2
// in different processes on the same machine.
//
// 2. Distributed -- e.g.,
//
// # Peer1
// % ./CODgram 10002 tango.cs.wustl.edu 10003 peer1
//
// # Peer1
// % ./CODgram 10003 tango.cs.wustl.edu 10002 peer2
//
// which will run peer1 and peer2 in different processes
// on the same or different machines. Note that you MUST
// give the name "peer1" as the final argument to one and
// only one of the programs so that the test will work properly.
#include "ace/Reactor.h"
#include "ace/SOCK_CODgram.h"
#include "ace/INET_Addr.h"
#include "ace/Process.h"
ACE_RCSID(Dgram, CODgram, "$Id$")
// Port used to receive for dgrams.
static u_short port1;
class Dgram_Endpoint : public ACE_Event_Handler
{
public:
Dgram_Endpoint (const ACE_INET_Addr &remote_addr,
const ACE_INET_Addr &local_addr);
// = Hook methods inherited from the <ACE_Event_Handler>.
virtual ACE_HANDLE get_handle (void) const;
virtual int handle_input (ACE_HANDLE handle);
virtual int handle_timeout (const ACE_Time_Value & tv,
const void *arg = 0);
virtual int handle_close (ACE_HANDLE handle,
ACE_Reactor_Mask close_mask);
int send (const char *buf, size_t len);
// Send the <buf> to the peer.
private:
ACE_SOCK_CODgram endpoint_;
// Wrapper for sending/receiving dgrams.
};
int
Dgram_Endpoint::send (const char *buf, size_t len)
{
return this->endpoint_.send (buf, len);
}
int
Dgram_Endpoint::handle_close (ACE_HANDLE handle,
ACE_Reactor_Mask)
{
ACE_UNUSED_ARG (handle);
this->endpoint_.close ();
return 0;
}
Dgram_Endpoint::Dgram_Endpoint (const ACE_INET_Addr &remote_addr,
const ACE_INET_Addr &local_addr)
: endpoint_ (remote_addr, local_addr)
{
}
ACE_HANDLE
Dgram_Endpoint::get_handle (void) const
{
return this->endpoint_.get_handle ();
}
int
Dgram_Endpoint::handle_input (ACE_HANDLE)
{
char buf[BUFSIZ];
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) activity occurred on handle %d!\n",
this->endpoint_.get_handle ()));
ssize_t n = this->endpoint_.recv (buf, sizeof buf);
if (n == -1)
ACE_ERROR ((LM_ERROR,
"%p\n",
"handle_input"));
else
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) buf of size %d = %*s\n",
n, n, buf));
return 0;
}
int
Dgram_Endpoint::handle_timeout (const ACE_Time_Value &,
const void *)
{
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) timed out for endpoint\n"));
return 0;
}
static int
run_test (u_short localport,
const char *remotehost,
u_short remoteport,
const char *peer)
{
ACE_INET_Addr remote_addr (remoteport,
remotehost);
ACE_INET_Addr local_addr (localport);
Dgram_Endpoint endpoint (remote_addr, local_addr);
// Read data from other side.
if (ACE_Reactor::instance ()->register_handler
(&endpoint,
ACE_Event_Handler::READ_MASK) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
"ACE_Reactor::register_handler"),
-1);
char buf[BUFSIZ];
ACE_OS::strcpy (buf,
"Data to transmit");
size_t len = ACE_OS::strlen (buf);
// "peer1" is the "initiator."
if (ACE_OS::strncmp (peer, "peer1", 5) == 0)
{
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) sending data\n"));
for (size_t i = 0; i < 20; i++)
{
endpoint.send (buf, len);
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) .\n"));
ACE_OS::sleep (1);
}
}
for (int i = 0; i < 40; i++)
{
// Wait up to 10 seconds for data.
ACE_Time_Value tv (10, 0);
if (ACE_Reactor::instance ()->handle_events (tv) <= 0)
ACE_ERROR_RETURN ((LM_DEBUG,
"(%P|%t) %p\n",
"handle_events"),
-1);
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) return from handle events\n"));
endpoint.send (buf, len);
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) .\n"));
}
if (ACE_Reactor::instance ()->remove_handler
(&endpoint,
ACE_Event_Handler::READ_MASK) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
"ACE_Reactor::remove_handler"),
-1);
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) exiting\n"));
return 0;
}
int
main (int argc, char *argv[])
{
// Estabish call backs and socket names.
port1 = argc > 1 ? ACE_OS::atoi (argv[1]) : ACE_DEFAULT_SERVER_PORT;
const char *remotehost = argc > 2 ? argv[2] : ACE_DEFAULT_SERVER_HOST;
const u_short port2 = argc > 3 ? ACE_OS::atoi (argv[3]) : port1 + 1;
// Providing the fourth command line argument indicates we don't
// want to spawn a new process. On Win32, we use this to exec the
// new program.
if (argc > 4)
run_test (port1,
remotehost,
port2,
argv[4]);
else
{
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) local port = %d, remote host = %s, remote port = %d\n",
port1,
remotehost,
port2));
ACE_Process_Options options;
options.command_line ("%s %d %s %d %c",
argv[0],
port1,
remotehost,
port2,
'c');
// This has no effect on NT and will spawn a process that exec
// the above run_test function.
options.creation_flags (ACE_Process_Options::NO_EXEC);
ACE_Process new_process;
switch (new_process.spawn (options))
{
case -1:
return -1;
case 0:
run_test (port1,
remotehost,
port2,
"peer1");
break;
default:
run_test (port2,
remotehost,
port1,
"peer2");
new_process.wait ();
break;
}
}
return 0;
}
|
