2 # NEPI, a framework to manage network experiments
3 # Copyright (C) 2013 INRIA
5 # This program is free software: you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License version 2 as
7 # published by the Free Software Foundation;
9 # This program is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 # GNU General Public License for more details.
14 # You should have received a copy of the GNU General Public License
15 # along with this program. If not, see <http://www.gnu.org/licenses/>.
17 # Author: Alina Quereilhac <alina.quereilhac@inria.fr>
19 from nepi.execution.attribute import Attribute, Flags, Types
20 from nepi.execution.resource import clsinit_copy, ResourceState
21 from nepi.resources.linux.tunnel import LinuxTunnel
22 from nepi.util.sshfuncs import ProcStatus
23 from nepi.util.timefuncs import tnow, tdiffsec
31 class LinuxGRETunnel(LinuxTunnel):
32 _rtype = "linux::GRETunnel"
33 _help = "Constructs a tunnel between two Linux endpoints using a UDP connection "
35 def log_message(self, msg):
36 return " guid %d - GRE tunnel %s - %s - %s " % (self.guid,
37 self.endpoint1.node.get("hostname"),
38 self.endpoint2.node.get("hostname"),
41 def get_endpoints(self):
42 """ Returns the list of RM that are endpoints to the tunnel
45 for guid in self.connections:
46 rm = self.ec.get_resource(guid)
47 if hasattr(rm, "gre_connect"):
51 def initiate_connection(self, endpoint, remote_endpoint):
52 # Return the command to execute to initiate the connection to the
54 connection_run_home = self.run_home(endpoint)
55 connection_app_home = self.app_home(endpoint)
56 data = endpoint.gre_connect(remote_endpoint,
61 def establish_connection(self, endpoint, remote_endpoint, data):
64 def verify_connection(self, endpoint, remote_endpoint):
65 remote_ip = socket.gethostbyname(remote_endpoint.node.get("hostname"))
67 command = "ping -c 4 %s" % remote_ip
68 (out, err), proc = endpoint.node.execute(command,
71 m = re.search("(\d+)% packet loss", str(out))
72 if not m or int(m.groups()[0]) == 100:
73 msg = " Error establishing GRE Tunnel"
74 self.error(msg, out, err)
75 raise RuntimeError, msg
77 def terminate_connection(self, endpoint, remote_endpoint):
80 def check_state_connection(self):
83 def valid_connection(self, guid):