I am thinking that you are referring to the RX ring
buffers(given below) ...when you said rx buffer
descriptor .....
Thanks
Sai
161 struct e1000_desc_ring {
162 /* pointer to the descriptor ring memory
*/
163 void *desc;
164 /* physical address of the descriptor ring
*/
165 dma_addr_t dma;
166 /* length of descriptor ring in bytes */
167 unsigned int size;
168 /* number of descriptors in the ring */
169 unsigned int count;
170 /* next descriptor to associate a buffer
with */
171 unsigned int next_to_use;
172 /* next descriptor to check for DD status
bit */
173 unsigned int next_to_clean;
174 /* array of buffer information structs */
175 struct e1000_buffer *buffer_info;
176 };
================================================================
--- warrier@xxxxxxxxxxx wrote:
> I'm not too sure about this but most chipsets write
> the received CRC at
> the end of the data buffer. You may want to dump the
> data as soon as you
> get an rx interrupt. The length in the rx buffer
> descriptor should tell
> you where the data ends. The next four bytes should
> be the CRC. I think
> ethereal may ignore this and only look at the data
> length.
>
> S
>
>
>
>
> sai narasimhamurthy <sai_narasi@xxxxxxxxx>
> Sent by: linux-net-owner@xxxxxxxxxxxxxxx
> 05/03/2005 05:52 PM
>
>
> To:
> cc:
> Subject: Ethernet Checksum
>
>
> I have an application which requires the recieved
> ethernet checksum. To begin with, I need to see if
> the
> ethernet checksum can be accessed at all. I was not
> able to view it in ethereal.
>
> How can I get access(or atleast get to see) the
> ethernet checksum at the reciever?
>
> I am in linux 2.4.29 , am using intel 82546 GBE.
>
> Sai
>
>
>
>
>
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