Re: [Divert] Linux 2.4.x kernel?

[Feiyi W. <fw...@mc...>]

if you just want to inject a brand new packet, can raw socket do?  Of
course, the interface is not unified in this case. For netfilter, a moudule
maybe sufficient for this purpose (haven't looked closely at libq to see if
a user space program can also do that).

Ilia, I am not sure if a module can give you the exact interface as orginal
divert socket, in other words, I suspect that more involvment is needed, I
guess it is up to you to find out :-)

-Feiyi

Jan Møller wrote:
> 
> I would say that netfiter can do almost the same as divert sockets. But
> there is a major difference.
> When using netfilter you can  modify and remove packets in the packet
> stream.
> When using divert sockets you can modify, remove and inject packets in the
> packet stream.
> The packet injection is a very important feature for some uses.
> 
> Unfortunately you cannot do that with netfilter in the Linux 2.4 kernel.
> When a packet pops from the kernel to userspace using netfilter, the user
> space application may either ignore it (remove it from the packet stream)
> or modify it. You cannot inject a packet without receiving one first.
> 
> It would infact be nice if divert would be ported to Linux 2.4 or if
> netfilter would allow packet injection.
> 
> -- J. Miller
> 

-- 
Feiyi Wang, Ph.D.
Advanced Networking Research, MCNC
(919) 248-1421 (ph) (919) 248-1455 (fax)
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