Merge branch 'mptcp-checksums'

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Mat Martineau says:

====================
mptcp: Fix checksum byte order on little-endian

These patches address a bug in the byte ordering of MPTCP checksums on
little-endian architectures. The __sum16 type is always big endian, but
was being cast to u16 and then byte-swapped (on little-endian archs)
when reading/writing the checksum field in MPTCP option headers.

MPTCP checksums are off by default, but are enabled if one or both peers
request it in the SYN/SYNACK handshake.

The corrected code is verified to interoperate between big-endian and
little-endian machines.

Patch 1 fixes the checksum byte order, patch 2 partially mitigates
interoperation with peers sending bad checksums by falling back to TCP
instead of resetting the connection.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

David S. Miller 2022-05-18 13:05:43 +01:00

parent 680b892685 ae66fb2ba6

commit 575fb4fb02

3 changed files with 46 additions and 18 deletions

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36

net/mptcp/options.c

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5

net/mptcp/protocol.h

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23

net/mptcp/subflow.c

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