Add map server fallback test

Change-Id: I48bf31b15253a1b9d1be785af319ef7466fa50bd
Signed-off-by: Filip Tehlar <ftehlar@cisco.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/tests/data_plane/vpp_lite_topo/scripts/dummy_map_server.py b/tests/data_plane/vpp_lite_topo/scripts/dummy_map_server.py
new file mode 100644
index 0000000..886e412
--- /dev/null
+++ b/tests/data_plane/vpp_lite_topo/scripts/dummy_map_server.py
@@ -0,0 +1,66 @@
+# Usage:
+#
+#   $ python dummy_map_server <bind-ip> <port>
+#
+
+import sys
+import socket
+import hmac
+import hashlib
+
+map_notify = (b"\x40\x00\x00\x01"
+    + "\x00\x00\x00\x00"
+    + "\x00\x00\x00\x00"
+    + "\x00\x01\x00\x14"  # key ID, Auth data length = 20
+    + "\x00\x00\x00\x00"
+    + "\x00\x00\x00\x00"
+    + "\x00\x00\x00\x00"
+    + "\x00\x00\x00\x00"
+    + "\x00\x00\x00\x00" # auth data
+    + "\x00\x01"
+    + "\x51\x80\x01\x18\x00\x00\x00\x00\x00\x01\x06\x00\x01\x00\x01\x01"
+    + "\x00\x00\x00\x04\x00\x01\x06\x00\x03\x01")
+
+notify_nonce_offset = 4
+notify_auth_data_len = 20
+register_nonce_offset = 4
+auth_data_offset = 16
+secret_key = 'password'
+
+
+def build_notify(nonce):
+  rp = bytearray(map_notify)
+
+  for i in range(0, 8):
+    rp[notify_nonce_offset + i] = nonce[i]
+
+  # compute hash
+  digest = hmac.new(secret_key, rp, hashlib.sha1).digest()
+
+  for i in range(0, notify_auth_data_len):
+    rp[auth_data_offset + i] = digest[i]
+
+  return rp
+
+
+def run(host, port):
+  sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+  server_address = (host, int(port))
+  sock.bind(server_address)
+
+  while True:
+    data, address = sock.recvfrom(4096)
+
+    # extract nonce from message
+    nonce = data[register_nonce_offset:register_nonce_offset+8]
+
+    rp = build_notify(nonce)
+    sock.sendto(rp, address)
+    print 'Replied to ', ''.join(x.encode('hex') for x in nonce)
+
+
+if __name__ == "__main__":
+  if len(sys.argv) < 2:
+    raise Exception('IP and port expected')
+
+  run(sys.argv[1], sys.argv[2])