...
use Socket;
use POSIX;
use IO::Handle;
...

 sub onWheelSFSuccess
 {
     my ( $heap, $clientSocket, $peerHostN, $peerPort )
       = @_[ HEAP, ARG0, ARG1, ARG2 ];

     my $peerHost = inet_ntoa($peerHostN);

     my $timeout = pack( 'll', 5, 0 );
     #$clientSocket->sockopt(SO_RCVTIMEO, $timeout );
     #$clientSocket->sockopt(SO_SNDTIMEO, $timeout );
     setsockopt ( $clientSocket, SOL_SOCKET, SO_RCVTIMEO, $timeout )
       or warn "Can't do setdosockotp: $!\n";

     setsockopt ( $clientSocket, SOL_SOCKET, SO_SNDTIMEO, $timeout )
       or warn "Can't do setdosockotp: $!\n";

     my $ioWheel = POE::Wheel::ReadWrite->new(
         Handle     => $clientSocket,
         InputEvent => 'onWheelRWInput',
         ErrorEvent => 'onWheelRWError',
         Filter     => POE::Filter::Stream->new(),

     );

......
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Can't do setdosockotp: Invalid argument
Can't do setdosockotp: Invalid argument
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