$Id: README,v 1.12 2002/01/14 09:15:49 jmorris Exp $ INTRODUCTION Perlipq is a Perl extension to Linux iptables userspace queueing via libipq. Packets may be selected from the stack via the iptables QUEUE target and passed to userspace. Perlipq allows these packets to be manipulated in Perl and passed back to the stack. This is version 1.25, released against iptables 1.2.5 with support for IPv6. REQUIREMENTS * Linux Kernel 2.4/2.5 * iptables 1.2.5+ INSTALLATION First, ensure you have a 2.4/2.5 kernel installed and running with Netfilter, Userspace queuing (experimental) and IP tables support. Build and install iptables as per the iptables documentation, then use 'make install-devel' to install libipq development components under /usr/local. Please read the libipq(3) man page for an overview of userspace packet queueing. Next, generate the perlipq makefile: # perl Makefile.PL The script will prompt you to provide the location of iptables so it can find the libipq library and headers, which should be under /usr/local as mentioned above. To build the perl module and extension, type: # make If you want to run the tests, you'll need to load the necessary iptables modules, then install a rule to invoke queuing. For example, a test setup used during development is as follows: # modprobe iptable_mangle # modprobe ip_queue # iptables -t mangle -F # iptables -t mangle -A OUTPUT -p icmp -j QUEUE These iptables commands flush the mangle table and install a rule to send any locally generated ICMP packets (e.g. ping) to the ip_queue module for userpace queuing. To run the tests: # make test and # make install will install perlipq. EXAMPLES passer.pl - Passes all packets back to kernel with NF_ACCEPT verdict. passer6.pl - Same as above, but for the IPv6 queue handler. dumper.pl - Dumps packet metadata and IP headers. COPYRIGHT Copyright (c) 2000-2002 James Morris <firstname.lastname@example.org> This package is released under the GPL.