VPN: Test to set up & validate a Client connection to the Server

server/site_linux_server.py

Index: server/site_linux_server.py
diff --git a/server/site_linux_server.py b/server/site_linux_server.py
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+# Copyright (c) 2011 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.
+
+import logging, re, time
+from autotest_lib.client.common_lib import error
+
+class LinuxServer(object):
+    """
+    Linux Server: A machine which hosts network services.
+
+    """
+
+    def __init__(self, server, params):
+        self.server   = server    # Server host.
+        self.vpn_kind = None
+        self.conf     = {}
+
+    def vpn_server_config(self, params):
+        """ Configure & launch the server side of the VPN.
+
+            Parameters, in 'params':
+
+               kind  : required
+
+                       The kind of VPN which should be configured and
+                       launched.
+
+                       Valid values:
+
+                          openvpn
+
+               config: required
+
+                       The configuration information associated with
+                       the VPN server.
+
+                       This is a dict which contains key/value pairs
+                       representing the VPN's configuration.
+
+          The values stored in the 'config' param must all be
+          supported by the specified VPN kind.
+        """
+        self.vpn_server_kill({}) # Must be first.  Relies on self.vpn_kind.
+
+        self.vpn_kind = params.get('kind', None)
+
+        # Read configuration information & create server configuration file.
+        #
+        #    As VPN kinds other than 'openvpn' are supported, and
+        #    since 'self.conf' is cummulative, perhaps there should be
+        #    a method which will clear 'self.conf'; different types of
+        #    VPN will likely not have the same configuration
+        #    parameters.  This is only really needed if a test is
+        #    written to switch between two differents kinds of VPN.
+        for k, v in params.get('config', {}).iteritems():
+            self.conf[k] = v
+        self.server.run("cat <<EOF >%s\n%s\nEOF\n" %
+                        ('/tmp/vpn-server.conf', '\n'.join(
+                    "%s %s" % kv for kv in self.conf.iteritems())))
+
+        # Launch specified VPN server.
+        if self.vpn_kind is None:
+            raise error.TestFail('No VPN kind specified for this test.');
+        elif self.vpn_kind == 'openvpn':
+            self.server.run("/usr/sbin/openvpn --config /tmp/vpn-server.conf &")
+        else:
+            raise error.TestFail('(internal error): No config case '
+                                 'for VPN kind (%s)' % self.vpn_kind)
+
+    def vpn_server_kill(self, params):
+        """ Kill the VPN server. """
+        if self.vpn_kind is not None:
+            if self.vpn_kind == 'openvpn':
+                self.server.run("pkill /usr/sbin/openvpn")
+            else:
+                raise error.TestFail('(internal error): No kill case '
+                                     'for VPN kind (%s)' % self.vpn_kind)
+            self.vpn_kind = None;