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 Argument "^E" isn't numeric in integer eq (==) at ./try.pl line 40.

    if ( $ver =~ /\x05/ && $nm ) {

my $x05 = sprintf "\x05"; # hex 05 as a raw character for ver test.

...
    }

}

socket( SERVER, PF_INET, SOCK_STREAM, $proto ) ||
    die "Can't create socket: $!\n";
...

listen( SERVER, SOMAXCONN ) ||
    die "Can't set max connections (listen): $!\n";