CODEWITHSUNDEEP
checksumicmp
netnovice
netnovice

Reputation: 11

ICMP Checksum offload

I have a simple custom ping program echo request / echo reply....Server part is deployed in Linux and client is in Windows machine....

Both client and server side programatically calculating ICMP check sum and setting it ..All are ok .

Now I want to enable ICMP check sum offload to Network card for Server module ....I have already enabled it using ethtool

I can see for TCP, Check sum offloading happening ......But when I comment out ICMP check sum calculation part from server program hoping Network card will do for me But I am not getting any Echo reply....Though Server is receiving Echo request....It must be for wrong check sum packet being dropped...

Can anybody show me the way.

Thank you

Upvotes: 1

Views: 1104

Answers (1)

Davide Berra
Davide Berra

Reputation: 6568

As far as i know the NIC checksum offloading can only mangle IP/TCP/UDP frames.

I don't think ICMP frame is covered.

Upvotes: 1

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