Re: [PATCH v2] tap: Explicitly drop IPv4 fragments, and give a warning

On Wed, 5 Jul 2023 14:35:16 +1000 David Gibson wrote:

We don't handle defragmentation of IP packets coming from the tap side, and we're unlikely to any time soon (with our large MTU, it's not useful for practical use cases). Currently, however, we simply ignore the fragmentation flags and treat fragments as though they were whole IP packets. This isn't ideal and can lead to rather cryptic behaviour if we do receive IP fragments.

Change the code to explicitly drop fragmented packets, and print a rate limited warning if we do encounter them.

Link: https://bugs.passt.top/show_bug.cgi?id=62

Signed-off-by: David Gibson

Applied. -- Stefano