Re: Network Namespace-1000 networks with Overlap Addresses

["Serge E. Hallyn" <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>]

Quoting Krishna Vamsi-B22174 (avamsi-KZfg59tc24xl57MIdRCFDg@public.gmane.org):
> 
> 
> Hi,
> 
> I am a newbie  to this list.  Here is my use case , we have  Loadable
> Kernel Module which applies security to
> the packets arriving from 1000 networks with overlap addresses. There
> are 3 different  user space process which handles 
> control traffic  from these 1000 networks .   
> 
> Please let me know
> 
> 1)How to create a Network Namespace Object ?

clone(CLONE_NEWNET)

> 2)How to delete a Network Namespace Object ?

exit

> 3)Can these 3  user space process see all the Network Namespace objects
> created in the kernel ?

No, network namespaces are fully isolated.  A virtual nic can only exist
in one network namespace, and physical nics can only exist in the
initial network namespace.

>  If so, how can they access these objects?
> 4)How to group 2-3 interfaces under a particular Network Namespace ?

I don't understand the question, but you pass a veth endpoint into a
network namespace using

	/sbin/ip link set veth1 netns $pid_in_other_netns

> Is there any patch available to achieve the above use case ?

You can use liblxc (available from lxc.sf.net) or libvirt-lxc
(libvirt.org).

-serge