[PATCH net 2/2] selftests/net: psp: test bidirectional data transfer

[Wei Wang <weiwan@google.com>]

_data_basic_send() and _data_basic_send_netkit_psp_assoc() currently
only verify unidirectional data transmission from the test socket to
psp_responder. As a result, they do not exercise the receive path for
PSP-encrypted TCP data segments arriving at the test socket (such as
packets redirected across a netkit interface associated via dev-assoc).

Use the existing "data echo" command in psp_responder to verify that the
test socket can also receive PSP-encrypted data from the peer in both
_data_basic_send() and _data_basic_send_netkit_psp_assoc().

Signed-off-by: Wei Wang <weiwan@google.com>
---
 tools/testing/selftests/drivers/net/psp.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/testing/selftests/drivers/net/psp.py b/tools/testing/selftests/drivers/net/psp.py
index 473500901879..e507951b440b 100755
--- a/tools/testing/selftests/drivers/net/psp.py
+++ b/tools/testing/selftests/drivers/net/psp.py
@@ -120,6 +120,12 @@ def _check_data_rx(cfg, exp_len):
     ksft_eq(read_len, exp_len)
 
 
+def _check_data_echo(cfg, s):
+    _send_with_ack(cfg, b'data echo\0')
+    s.settimeout(1.0)
+    ksft_eq(s.recv(5), b'echo\0')
+
+
 def _check_data_outq(s, exp_len, force_wait=False):
     outq = 0
     for _ in range(10):
@@ -478,6 +484,7 @@ def _data_basic_send(cfg, version, ipver):
 
     data_len = _send_careful(cfg, s, 100)
     _check_data_rx(cfg, data_len)
+    _check_data_echo(cfg, s)
     _close_psp_conn(cfg, s)
 
 
@@ -726,6 +733,7 @@ def _data_basic_send_netkit_psp_assoc(cfg, version, ipver):
 
         data_len = _send_careful(cfg, sock, 100)
         _check_data_rx(cfg, data_len)
+        _check_data_echo(cfg, sock)
         _close_psp_conn(cfg, sock)
 
 
-- 
2.56.0.257.gf7497c7d27-goog