Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2100072
Tested: LNST, Tier1
Conflicts: context differences because rhel-9 already has
the upstream commit 1e39e5a32ad7 ("mptcp: infinite mapping sending")
Upstream commit:
commit ba2c89e0ea74a904d5231643245753d77422e7f5
Author: Paolo Abeni <pabeni@redhat.com>
Date: Tue May 17 11:02:11 2022 -0700
mptcp: fix checksum byte order
The MPTCP code typecasts the checksum value to u16 and
then converts it to big endian while storing the value into
the MPTCP option.
As a result, the wire encoding for little endian host is
wrong, and that causes interoperabilty interoperability
issues with other implementation or host with different endianness.
Address the issue writing in the packet the unmodified __sum16 value.
MPTCP checksum is disabled by default, interoperating with systems
with bad mptcp-level csum encoding should cause fallback to TCP.
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/275
Fixes: c5b39e26d0 ("mptcp: send out checksum for DSS")
Fixes: 390b95a5fb ("mptcp: receive checksum for DSS")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
65330c619e