netdev - interface information for recvd packet

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Date:	Tue, 30 Aug 2011 11:55:58 -0400
From:	Viral Mehta <viral.vkm@...il.com>
To:	netdev@...r.kernel.org
Subject: interface information for recvd packet

Hi,

I was trying to implement following thing,

1. I wanted to know whenever packet received for particular socket, I
want to know which network interface actually received it ?
2. I was looking at net/ipv4/tcp.c and in function tcp_recvmsg(); I am
trying to get interface name by accessing sk_buff->dev->name
    However, it gives me (null). I have made sure that in my ethernet
(NIC) driver, I filled up that information before doing netif_rx().

So, the question is,
Is this information Trimmed out at some upper layer ??

Thanks,




-- 
Thanks,
Viral Mehta
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