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Problem in registering new netfilter target module

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Old 11-09-2005
Problem in registering new netfilter target module

Friends I'm facing a big problem trying to extend the netfilter. Somone please help me with your quick reply (any hint) as I've to meet a deadline.

My problem is that I've written a new netfilter target module and its corresponding userspace program for iptables to change the packet type of a packet. I compiled the iptables and kernel without any error and installed this new kernel (with newly compiled parameters) in my boot partition.

Next when I booted into this kernel and tried using this target it gives error "invalid argument" which I think is coming because the target module is not geting loaded (as on failure it returns EINVAL).

Now can anyone tell me what may b the problem.
I think I can summarise my problem as what can b pozbl. reasons for which any kernel module not get registered.

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ULOGD(8)						      System Manager's Manual							  ULOGD(8)

ulogd - netfilter/iptables ULOG daemon SYNOPSIS
ulogd [options] DESCRIPTION
ulogd connects to the netlink device of the Linux kernel and reads messages from the netfilter that get queued with the iptables ULOG tar- get. For this to work you have to compile the ULOG target into your kernel or load the respective module. The received messages can be logged into files or into a mySQL or PostgreSQL database. OPTIONS
-d, --daemon fork ulogd into background (start as daemon) -c <filename>, --configfile <filename> use <filename> as configuration file instead of /etc/ulogd.conf -h, --help show usage information -V, --version show version information and copyright FILES
/etc/ulogd.conf /var/log/ulog/ulogd.log SEE ALSO
There is more documentation about the daemon and the database plugins (including examples) in the directories /usr/share/doc/ulogd /usr/share/doc/ulogd-mysql and /usr/share/doc/ulogd-pgsql AUTHOR
This manual page was written by Joerg Wendland <>, for the Debian GNU/Linux system (but may be used by others). Linux Netfilter November 05, 2002 ULOGD(8)

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