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Where can I find resources about Socket, IO::Socket, IO::Socket::INET

by Anonymous Monk
on Apr 21, 2000 at 18:36 UTC ( [id://8376]=perlquestion: print w/replies, xml ) Need Help??

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

I always run into questions about the use of some getsockopt() and the use of some of the methods in IO::Socket. I'd like to find an easy to understand reference to using Socket and IO::Socket. I've manned them, been to cpan, up and down perl.com forever, even read a bunch of free scripts, but I want to learn every option and method.

Ex: why doesn't this work?

getsockopt(TESTSOCK, SOL_SOCKET, SO_SNDTIMEO, 1);

When the description for getsockopt clearly states getsockopt SOCKET LEVEL OPTNAME VAL

I need a good tutorial - if anyone can give a hand, I'd surely appreciate a deviation from manuals that don't provide examples

Originally posted as a Categorized Question.

  • Comment on Where can I find resources about Socket, IO::Socket, IO::Socket::INET

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Re: Where can I find resources about Socket, IO::Socket, IO::Socket::INET
by btrott (Parson) on Apr 21, 2000 at 19:25 UTC
    That's not what the perlfunc entry for *my* getsockopt says--mine says: 
        getsockopt SOCKET,LEVEL,OPTNAME

    [download]
    Are you talking about getsockopt or setsockopt? Sounds like the latter. But if you're writing it as getsockopt, that's the problem. :)

    If you're using IO:Socket, this is much easier: 

        my $sock = IO::Socket::INET->new(
        Listen    => 5,
        LocalAddr => 'localhost',
        LocalPort => 9000,
        Proto     => 'tcp');
 
    $sock->setopt(SO_SNDTIMEO, 1);

    [download]
    It acts on the SOL_SOCKET level.

    In terms of a general resource--you said you've read the man pages. Have you read the man pages for the C functions that all this stuff is based on? Those might help you out. The options for setsockopt/getsockopt are in setsockopt(2).

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