[dpdk-dev] ip_chksum not updated in ipsec-secgw application

[Akhil Goyal]

On 7/18/2016 6:50 PM, Thomas Monjalon wrote:
> 2016-07-18 13:57, Sergio Gonzalez Monroy:
>> On 18/07/2016 13:41, Akhil Goyal wrote:
>>> In Ipsec-secgw application, while adding the outer IP header,
>>> it seems that the application does not update the checksum value
>>> for outbound packets. This result in incorrect ip->checksum in
>>> the encrypted packet.
> [...]
>>
>> It is intentional. The application is using IP checksum offload
>
> The correct behaviour is to have a software fallback (using rte_ip.h)
> for drivers which do not support checksum offload.
> But given it is just an example, it is normal to have this kind of
> constraint. However I think it should be explained in its doc.
> And a list of tested NICs would be nice to have.
>
Agreed. The driver that I was using did not enable checksum offload. It 
is good to have a fallback option.