> tcp_output can put out a 0 length data tcp packet with TH_URG and
> pointer set.
[..]
> According to rfc 793, "To send an urgent indication the user must
> also send at least one data octet."

Thank you for your anaylsis.

Your patch seems not to be against -current?
Please file a PR (with send-pr), specifying the version you are running.

This will make sure your error message will not get lost/forgotten.


Martin