protected void OnServerNameEntryActivated(object sender, EventArgs e)
{
IPAddress hostaddr;
// Resolve the server IP address
try
{
hostaddr = Dns.GetHostAddresses(ServerName.Text)[0];
}
catch
{
MessageBox.Show("ERROR: Cannot resolve " + ServerName.Text);
clnt = null;
return;
}
// Open connection to the server
try
{
clnt = new missileClient(hostaddr, OncRpcProtocols.ONCRPC_UDP);
}
catch
{
MessageBox.Show("ERROR: Connection to " + ServerName.Text + " failed");
clnt = null;
return;
}
// Send NOP command to the server, to test the connection
try
{
int status = clnt.missile_command_1(missile.CMD_NOP);
if (status != 0)
{
clnt = null;
MessageBox.Show("ERROR: RPC call returned error " + status.ToString());
return;
}
}
catch
{
clnt = null;
MessageBox.Show("ERROR: RPC call to " + ServerName.Text + " failed");
return;
}
// Disable further changes to the server name field
ServerName.IsEditable = false;
// Enable buttons now that the connection to the server is working
foreach (var b in CommandButtons.Keys)
{
b.Sensitive = true;
}
// Save the server name in the registry
Registry.SetValue(RegistryKey, ServerName.Name, ServerName.Text);
}