selftests/bpf: use localhost in tcp_{server,client}.py

Bind and connect to localhost. There is no reason for this test to
use non-localhost interface. This lets us run this test in a network
namespace.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

1 files changed, 1 insertions, 4 deletions

diff --git a/tools/testing/selftests/bpf/tcp_server.py b/tools/testing/selftests/bpf/tcp_server.py
index b39903fca4c8..0ca60d193bed 100755
--- a/tools/testing/selftests/bpf/tcp_server.py
+++ b/tools/testing/selftests/bpf/tcp_server.py
@@ -35,13 +35,10 @@ MAX_PORTS = 2
 serverPort = SERVER_PORT
 serverSocket = None
 
-HostName = socket.gethostname()
-
 # create passive socket
 serverSocket = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
-host = socket.gethostname()
 
-try: serverSocket.bind((host, 0))
+try: serverSocket.bind(('localhost', 0))
 except socket.error as msg:
     print('bind fails: ' + str(msg))