(Running AS 5.8.6 on WinXP)

I'm trying to set a socket to nonblocking mode: 

use IO::Socket::INET;

my $sock = IO::Socket::INET->new(
    PeerAddr => 'peer',
    PeerPort => 9876,
    Proto => 'tcp',
    Type => SOCK_STREAM,
    Blocking => 0
) || die $!;

$sock->close();

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It always dies (tho the error seems to flip around between 
Bad file descriptor at iosock.pl line 3.

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and 
IO::Socket::INET:       ...propagated at iosock.pl line 3.

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After stepping into IO::Socket::INET, the failure is always on the $sock->blocking() call.

I found node Re: Net::SSH::Perl error message, which points to an old activestate bug report that essentially says I'm SOL.

  1. Does this Win32 nonblocking sockets issue still exist ?
  2. If so, is there a known workaround for trying to send() large buffers wo/ blocking for an extended period ? Is there a way to safely shut off the offending SO_SYNCHRONOUS_NONALERT socket option after connecting, and then setting $sock->blocking(0) ?

Update:

Once again, I posted too soon. After changing my supersearch terms, I found Re^2: nbtstat.pl fails for non-windows IP, which provides a number of pointers, esp the ioctl(). Hopefully it will work as advertised...

In reply to Nonblocking sockets on Win32 by renodino

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