On 2022/9/20 22:42, Lorenz Bauer wrote:
On Mon, 19 Sep 2022, at 11:55, shaozhengchao wrote:
Sorry for the delay. I'm busy testing the TC module recently. I'm very
sorry for the user-space breakage.
The root cause of this problem is that eth_type_trans() is called when
the protocol type of the SKB is parsed. The len value of the SKB is
reduced to 0. If the user mode requires that the forwarding succeed, or
if the MAC header is added again after the MAC header is subtracted,
is this appropriate?
We don't require forwarding to succeed with a 14 byte input buffer. We also don't look at the MAC header.
I think refusing to forward 0 length packets would be OK. Not 100% certain I understood you correctly, let me know if this helps.
Best
Lorenz
Hi Lorenz
Sorry. But how does the rejection of the 0 length affect the
test case? Is the return value abnormal, send packet failure or some
others?
Zhengchao Shao
