variable dev->hard_header_len

[Madhavi (madhavis@sasken.com)]

Hi

I am trying to write a driver on linux-2.4.19. My hardware requires that
the packets going out should be VLAN tagged and coming in might/might not
have a tag. I have written a new hard_header function for this and set the
hard_header_len to ETH_HLEN+VLAN_HLEN. But, when a packet is received
without a tag, the eth_type_trans function is removing the first
ETH_HLEN+VLAN_HLEN bytes, as the hard_header_len is this much. so, the
packets are not being understood by the upper layers properly.

I changed the eth_type_trans function code as follows:

	if the device is my device
	        skb_pull(skb,ETH_HLEN);
	else
	        skb_pull(skb,dev->hard_header_len);

Could anyone tell me if it is going to affect any other functionality?

Could someone suggest some cleaner solution for my problem?

Thanks & regards
Madhavi.

Madhavi Suram
Software Engineer
Customer Delivery / Networks
Sasken Communication Technologies Limited
139/25, Ring Road, Domlur
Bangalore - 560071 India
Email: madhavis@xxxxxxxxxx
Tel: + 91 80 5355501 Extn: 8062
Fax: + 91 80 5351133
URL: www.sasken.com

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