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Once syncookie support is added, no state will be stored anymore when the syn/ack is generated in syncookie mode. When the ACK comes back, the generated key will be taken from the TCP ACK, the token is re-generated and inserted into the token tree. This means we can't retry with a new key when the token is already taken in the syncookie case. Therefore, move the retry logic to the caller to prepare for syncookie support in mptcp. Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.