netdev - Re: Is there any function similar to inet

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Message-ID: <49252F1A.4060304@tihlde.org>
Date:	Thu, 20 Nov 2008 10:34:18 +0100
From:	Roar Bjørgum Rotvik <roarbr@...lde.org>
To:	linux_kernel_chan@...oo.com
CC:	netdev@...r.kernel.org
Subject: Re: Is there any function similar to inet_ntoa() in Kernel or NetFilter
 ?

Kunsheng Chen wrote:
> Hello, everyone,
> 
> I am doing a project similar to iptable using netfilter, currently I want to convert a IP address from 'long int' back to dotted address.
> 
> I don't know whether there is some functions inside kernel or netfilter that could make that like using inet_ntoa() in <arpa/inet.h>

How about NIPQUAD and NIPQUAD_FMT (for IPv4):
http://lxr.linux.no/linux+v2.6.27.6/include/linux/kernel.h#L324
http://lxr.linux.no/linux+v2.6.27.6/include/linux/kernel.h#L319

Example on how to use:
http://lxr.linux.no/linux+v2.6.27.6/net/ipv4/ipconfig.c#L1184

printk("my address is " NIPQUAD_FMT "\n", NIPQUAD(ic_myaddr));

-- 
Roar Bjørgum Rotvik

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