automated WiFi test framework and start of tests

server/site_tests/network_WiFiSecMat/015CheckWPA_PTK_Rekey

+# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{ "name":"CheckWPA_PTK_Rekey",
+  "steps":[             # Channel [any]
+    [ "create",         { "type":"hostap" } ],
+    [ "config",         { "channel":"2412", "mode":"11g",
+                          "wpa":"3", "wpa_key_mgmt":"WPA-PSK",
+                          "wpa_pairwise":"TKIP CCMP",
+                          "rsn_pairwise":"CCMP",
+                          "wpa_ptk_rekey":"10",     # rekey every 10 secs
+                          "wpa_passphrase":"chromeos" } ],
+    [ "connect",        { "security":"rsn", "psk":"chromeos" } ],
+        # NB: 200 packets @ 1/5 sec intervals should take >>10 secs so
+        # there should be several rekeys; check the tx/rx counts to verify
+        # nothing was lost
+    [ "client_ping",    { "count":"200", "interval":".2" } ],
+    [ "destroy" ],
+  ],
+}