applied the except and raise fixers to the master branch to close the gap with py3

[nepi.git] / src / nepi / resources / linux / gretunnel.py

diff --git a/src/nepi/resources/linux/gretunnel.py b/src/nepi/resources/linux/gretunnel.py
index 2d866c2..f422a63 100644 (file)
--- a/src/nepi/resources/linux/gretunnel.py
+++ b/src/nepi/resources/linux/gretunnel.py
@@ -3,9 +3,8 @@
 #    Copyright (C) 2013 INRIA
 #
 #    This program is free software: you can redistribute it and/or modify
-#    it under the terms of the GNU General Public License as published by
-#    the Free Software Foundation, either version 3 of the License, or
-#    (at your option) any later version.
+#    it under the terms of the GNU General Public License version 2 as
+#    published by the Free Software Foundation;
 #
 #    This program is distributed in the hope that it will be useful,
 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -18,21 +17,20 @@
 # Author: Alina Quereilhac <alina.quereilhac@inria.fr>
 
 from nepi.execution.attribute import Attribute, Flags, Types
-from nepi.execution.resource import clsinit_copy, ResourceState, \
-        reschedule_delay
+from nepi.execution.resource import clsinit_copy, ResourceState
 from nepi.resources.linux.tunnel import LinuxTunnel
 from nepi.util.sshfuncs import ProcStatus
 from nepi.util.timefuncs import tnow, tdiffsec
 
-import os
+import re
 import socket
 import time
+import os
 
 @clsinit_copy
 class LinuxGRETunnel(LinuxTunnel):
-    _rtype = "LinuxGRETunnel"
+    _rtype = "linux::GRETunnel"
     _help = "Constructs a tunnel between two Linux endpoints using a UDP connection "
-    _backend = "linux"
 
     def log_message(self, msg):
         return " guid %d - GRE tunnel %s - %s - %s " % (self.guid, 
@@ -46,7 +44,7 @@ class LinuxGRETunnel(LinuxTunnel):
         connected = []
         for guid in self.connections:
             rm = self.ec.get_resource(guid)
-            if hasattr(rm, "gre_connect_command"):
+            if hasattr(rm, "gre_connect"):
                 connected.append(rm)
         return connected
 
@@ -54,55 +52,33 @@ class LinuxGRETunnel(LinuxTunnel):
         # Return the command to execute to initiate the connection to the
         # other endpoint
         connection_run_home = self.run_home(endpoint)
-        gre_connect_command = endpoint.gre_connect_command(
-                remote_endpoint, connection_run_home)
-
-        # upload command to connect.sh script
-        shfile = os.path.join(self.app_home(endpoint), "gre-connect.sh")
-        endpoint.node.upload(udp_connect_command,
-                shfile,
-                text = True, 
-                overwrite = False)
-
-        # invoke connect script
-        cmd = "bash %s" % shfile
-        (out, err), proc = endpoint.node.run(cmd, self.run_home(endpoint)) 
-             
-        # check if execution errors occurred
-        msg = " Failed to connect endpoints "
-        
-        if proc.poll():
-            self.error(msg, out, err)
-            raise RuntimeError, msg
-    
-        # Wait for pid file to be generated
-        pid, ppid = endpoint.node.wait_pid(self.run_home(endpoint))
-        
-        # If the process is not running, check for error information
-        # on the remote machine
-        if not pid or not ppid:
-            (out, err), proc = endpoint.node.check_errors(self.run_home(endpoint))
-            # Out is what was written in the stderr file
-            if err:
-                msg = " Failed to start command '%s' " % command
-                self.error(msg, out, err)
-                raise RuntimeError, msg
-
-        # Wait if name
-        return True
+        connection_app_home = self.app_home(endpoint)
+        data = endpoint.gre_connect(remote_endpoint, 
+                connection_app_home,
+                connection_run_home) 
+        return data
 
     def establish_connection(self, endpoint, remote_endpoint, data):
         pass
 
     def verify_connection(self, endpoint, remote_endpoint):
-        # Execute a ping from both sides to verify that the tunnel works
-        pass
+        remote_ip = socket.gethostbyname(remote_endpoint.node.get("hostname"))
+
+        command = "ping -c 4 %s" % remote_ip
+        (out, err), proc = endpoint.node.execute(command,
+                blocking = True)
+
+        m = re.search("(\d+)% packet loss", str(out))
+        if not m or int(m.groups()[0]) == 100:
+             msg = " Error establishing GRE Tunnel"
+             self.error(msg, out, err)
+             raise RuntimeError(msg)
 
     def terminate_connection(self, endpoint, remote_endpoint):
         pass
 
-    def check_state_connection(self, endpoint, remote_endpoint):
-        raise NotImplementedError
+    def check_state_connection(self):
+        pass
 
     def valid_connection(self, guid):
         # TODO: Validate!