Can't create socket using IO::Socket

Question

when I run the following code, the execution is just hanging there, No response at all. does any of you can tell me what's wrong with the sample code?

use strict;
use warnings;
use IO::Select;
use IO::Socket;

my $s = new IO::Socket (
                          LocalPort => 8889,
                          Proto  => 'tcp',
                          Listen => 16,
                          Reuse  => 1
                      );

die "could not create socket $!\n" unless $s;

What specifically do you mean, "just hanging there"? What symptoms are you observing? When I run the above code (under 5.8 or 5.10), I get a fatal exception thrown by the new constructor: IO::Socket: Cannot configure a generic socket at bad-socket.pl line 8 — pilcrow
– pilcrow, Commented Jun 11, 2010 at 18:56

MarquisDeMizzle · Accepted Answer · 2010-06-11 04:07:20Z

5

If you provide arguments to the IO::Socket constructor it demands a Domain argument. Check out the full source here, specifically the configure subroutine which gets called from the constructor if you've provided arguments.

sub new {
  ...
  return scalar(%arg) ? $sock->configure(\%arg)
        : $sock;
}

sub configure {
  my($sock,$arg) = @_;
  my $domain = delete $arg->{Domain};

  croak 'IO::Socket: Cannot configure a generic socket' unless defined $domain;
  ....
}

Perhaps you're thinking of IO::Socket::INET?

answered Jun 11, 2010 at 4:07

MarquisDeMizzle

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Comments

Dummy00001 · Accepted Answer · 2010-06-11 21:04:57Z

1

what's wrong with the sample code?

IO::Socket is a generic super class for Perl sockets.

You need to replace the IO::Socket with IO::Socket::INET.

answered Jun 11, 2010 at 21:04

Dummy00001

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1 Comment

Dummy00001 Over a year ago

btw, do the same mistake myself all the time.

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