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f596293314
When receiving an ADD_ADDR right after the 3WHS, the connection will switch to 'fully established'. It means the MPTCP worker will be called to treat two events, in this order: ADD_ADDR_RECEIVED, PM_ESTABLISHED. The MPTCP endpoints cannot have the ID 0, because it is reserved to the address and port used by the initial subflow. To be able to deal with this case in different places, msk->mpc_endpoint_id contains the endpoint ID linked to the initial subflow. This variable was only set when treating the first PM_ESTABLISHED event, after ADD_ADDR_RECEIVED. That's why in fill_local_addresses_vec(), the endpoint addresses were compared with the one of the initial subflow, instead of only comparing the IDs. Instead, msk->mpc_endpoint_id is now set when treating ADD_ADDR_RECEIVED as well, if needed, then the IDs can be compared. To be able to do so, the code doing that is now in a dedicated helper, and called from the functions linked to the two actions. While at it, mptcp_endp_get_local_id() has also been moved up, next to this new helper, because they are linked, and to be able to use it in fill_local_addresses_vec() in the next commit. Reviewed-by: Mat Martineau <martineau@kernel.org> Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Link: https://patch.msgid.link/20250925-net-next-mptcp-c-flag-laminar-v1-14-ad126cc47c6b@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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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 reStructuredText 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.