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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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LEARN ABOUT CENTOS

firewalld.service

FIREWALLD.SERVICE(5)						 firewalld.service					      FIREWALLD.SERVICE(5)

NAME

       firewalld.service - firewalld service configuration files

SYNOPSIS

       /etc/firewalld/services/service.xml
       /usr/lib/firewalld/services/service.xml

DESCRIPTION

       A firewalld service configuration file provides the information of a service entry for firewalld. The most important configuration options
       are ports, modules and destination addresses.

       This example configuration file shows the structure of an service configuration file:

	   <?xml version="1.0" encoding="utf-8"?>
	   <service>
	     <short>My Service</short>
	     <description>description</description>
	     <port port="137" protocol="tcp"/>
	     <module name="nf_conntrack_netbios_ns"/>
	     <destination ipv4="224.0.0.251" ipv6="ff02::fb"/>
	   </service>

OPTIONS

       The config can contain these tags and attributes. Some of them are mandatory, others optional.

   service
       The mandatory service start and end tag defines the service. This tag can only be used once in a service configuration file. There are
       optional attributes for services:

       version="string"
	   To give the service a version.

   short
       Is an optional start and end tag and is used to give an icmptype a more readable name.

   description
       Is an optional start and end tag to have a description for a icmptype.

   port
       Is an optional empty-element tag and can be used several times to have more than one port entry. All attributes of a port entry are
       mandatory:

       port="string"
	   The port string can be a single port number or a port range portid-portid or also empty to match a protocol only.

       protocol="string"
	   If a port is given, the protocol value can either be tcp or udp. If no port is given, it can be any protocol from /etc/protocols to
	   have a protocol match only.

   module
       Is an optional empty-element tag and can be used several times to enable more than one netfilter kernel helper for the service. A module
       entry has exactly one attribute:

       name="string"
	   Defines the name of the kernel netfilter helper as a string.

   destination
       Is an optional empty-element tag and can be used only once. The destination specifies the destination network as a network IP address
       (optional with /mask), or a plain IP address. The use of hostnames is not recommended, because these will only be resolved at service
       activation and transmitted to the kernel. For more information in this element, please have a look at --destination in iptables(8) and
       ip6tables(8).

       ipv4="address[/mask]"
	   The IPv4 destination address with optional mask.

       ipv6="address[/mask]"
	   The IPv6 destination address with optional mask.

SEE ALSO

       firewall-applet(1), firewalld(1), firewall-cmd(1), firewall-config(1), firewalld.conf(5), firewalld.direct(5), firewalld.icmptype(5),
       firewalld.lockdown-whitelist(5), firewall-offline-cmd(1), firewalld.richlanguage(5), firewalld.service(5), firewalld.zone(5),
       firewalld.zones(5)

NOTES

       firewalld home page at fedorahosted.org:
	   http://fedorahosted.org/firewalld/

       More documentation with examples:
	   http://fedoraproject.org/wiki/FirewallD

AUTHORS

       Thomas Woerner <twoerner@redhat.com>
	   Developer

       Jiri Popelka <jpopelka@redhat.com>
	   Developer

firewalld 0.3.9 													      FIREWALLD.SERVICE(5)