selftests: mptcp: add invert check in check_transfer
This patch added the invert bytes check for the output data in
check_transfer().
Instead of the file mismatch error:
[ FAIL ] file received by server does not match (in, out):
-rw------- 1 root root
45643832 Jan 16 15:04 /tmp/tmp.9xpM6Paivv
Trailing bytes are:
MPTCP_TEST_FILE_END_MARKER
-rw------- 1 root root
45643832 Jan 16 15:04 /tmp/tmp.wnz1Yp4u7Z
Trailing bytes are:
MPTCP_TEST_FILE_END_MARKER
Print out the inverted bytes like this:
file received by server has inverted byte at
7454789
file received by server has inverted byte at
7454790
file received by server has inverted byte at
7454791
file received by server has inverted byte at
7454792
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>