In a few MPTCP selftest tools, gcc 12 complains that the 'sock' variable
might be used uninitialized. This is a false positive because the only
code path that could lead to uninitialized access is where getaddrinfo()
fails, but the local xgetaddrinfo() wrapper exits if such a failure
occurs.
Initialize the 'sock' variable anyway to allow the tools to build with
gcc 12.
Fixes: 048d19d444 ("mptcp: add basic kselftest for mptcp")
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Check that getsockopt(IP_TOS) returns what setsockopt(IP_TOS) did set
right before.
Also check that socklen_t == 0 and -1 input values match those
of normal tcp sockets.
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Add a test program that retrieves the three info types:
1. mptcp meta information
2. tcp info for subflow
3. subflow endpoint addresses
For all three rudimentary checks are added.
1. Meta information checks that the logical mptcp
sequence numbers advance as expected, based on the bytes read
(init seq + bytes_received/sent) and the connection state
(after close, we should exect 1 extra byte due to FIN).
2. TCP info checks the number of bytes sent/received vs.
sums of read/write syscall return values.
3. Subflow endpoint addresses are checked vs. getsockname/getpeername
result.
Tests for forward compatibility (0-initialisation of output-only
fields in mptcp_subflow_data structure) are added as well.
Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
