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

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

Replies are listed 'Best First'.
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).	[reply] [d/l] [select]

Replies are listed 'Best First'.

Re: Where can I find resources about Socket, IO::Socket, IO::Socket::INET
by btrott (Parson) on Apr 21, 2000 at 19:25 UTC

perlfunc

getsockopt

    getsockopt SOCKET,LEVEL,OPTNAME
[download]

getsockopt

setsockopt

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]

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).

[reply]
[d/l]
[select]