10-03-2001
C Prog to close a socket in established state
I have a SUN environment running an WebLogic that communicates w/a 3rd party running IIS. When the IIS site goes down (frequently), I am stuck with sockets in an ESTABLISHED state, and cannot seem to figure out how to avoid this. No exceptions are thrown as I can still open connections to the IIS site, but no data is returned.
What I would like to do is to determine from lsof -i tcp@host, the file descriptors, and then determine how long they have been in ESTABLISHED state, and then close them if they are older than say 1 hour.....
Any ideas????
As always- all help and assistance is greatly appreciated.
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LEARN ABOUT DEBIAN
lwp::authen::negotiate
LWP::Authen::Negotiate(3pm) User Contributed Perl Documentation LWP::Authen::Negotiate(3pm)
NAME
LWP::Authen::Negotiate - GSSAPI based Authentication Plugin for LWP
SYNOPSIS
#! /usr/bin/perl -w
use strict;
require LWP::UserAgent;
# uncomment if you want see what is going wrong messages
#
#use LWP::Debug qw(+);
my $ua = LWP::UserAgent->new;
my $response = $ua->get('http://testwurst.grolmsnet.lan:8090/geheim/');
if ($response->is_success) {
print $response->content; # or whatever
}
else {
die $response->status_line;
}
just install LWP::Authen::Negotiate, LWP uses it as authentication plugin. Use your LWP::UserAgent Scripts as usual. Authentication is
done transparent based on your GSSAPI installation (MIT Kerberos or Heimdal)
WWW-Negotiate Webservers are IIS or Apache with mod_auth_kerb for example.
DESCRIPTION
To see what ist going on add
use LWP::Debug qw(+);
to yor LWP using Scripts.
(e.g. too see what is going wrong with GSSAPI...)
DEBUGGING
To see what ist going on (and going wrong) add
use LWP::Debug qw(+);
to yor LWP using Scripts.
(e.g. too see what is going wrong with GSSAPI...)
the output will look like this:
LWP::UserAgent::new: ()
LWP::UserAgent::request: ()
LWP::UserAgent::send_request: GET http://testwurst.grolmsnet.lan:8090/geheim/
LWP::UserAgent::_need_proxy: Not proxied
LWP::Protocol::http::request: ()
LWP::Protocol::collect: read 478 bytes
LWP::UserAgent::request: Simple response: Unauthorized
LWP::Authen::Negotiate::authenticate: authenticate() called
LWP::Authen::Negotiate::authenticate: target hostname testwurst.grolmsnet.lan
LWP::Authen::Negotiate::authenticate: GSSAPI servicename HTTP/moerbsen.grolmsnet.lan@GROLMSNET.LAN
LWP::Authen::Negotiate::authenticate: Miscellaneous failure (see text)
LWP::Authen::Negotiate::authenticate: open(/tmp/krb5cc_1000): file not found
In this case the credentials cache was empty. Run kinit first ;-)
ENVIRONMENT
LWP_AUTHEN_NEGOTIATE_DELEGATE
Define to enable ticket forwarding to webserver.
SEE ALSO
http://www.kerberosprotocols.org/index.php/Draft-brezak-spnego-http-03.txt
Description of WWW-Negotiate protol
http://modauthkerb.sourceforge.net/
the Kerberos and SPNEGO Authentication module for Apache mod_auth_kerb
http://perlgssapi.sourceforge.net/
Module Homepage
http://www.kerberosprotocols.org/index.php/Web
Sofware and APIs related to WWW-Negotiate
http://www.grolmsnet.de/kerbtut/
describes how to let mod_auth_kerb play together with Internet Explorer and Windows2003 Server
BUGS
As default Kerberos 5 is selected as GSSAPI mechanism. a later veriosn will make that configureable.
AUTHOR
Achim Grolms, <achim@grolmsnet.de>
http://perlgssapi.sourceforge.net/
Thanks to
Leif Johansson
who has conributed a lot of code from his implementation of the module and send a lot of input, ideas and feedback
Harald Joerg
helped with Kerberos knowledge and does testing on cygwin against IIS and mod_auth_kerb
Christopher Odenbach
does a lot of testing on Linux and Solaris
Dax Kelson
does a lot of testing on Linux
Karsten Kuenne
helped with advice
COPYRIGHT AND LICENSE
Copyright (C) 2006 by Achim Grolms <perl@grolmsnet.de>
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.4 or,
at your option, any later version of Perl 5 you may have available.
perl v5.10.1 2009-10-29 LWP::Authen::Negotiate(3pm)