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 as published by
7 # the Free Software Foundation, either version 3 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
18 # Author: Alina Quereilhac <alina.quereilhac@inria.fr>
20 from nepi.execution.attribute import Attribute, Flags, Types
21 from nepi.execution.resource import clsinit_copy, ResourceState, \
23 from nepi.resources.linux.tunnel import LinuxTunnel
24 from nepi.util.sshfuncs import ProcStatus
25 from nepi.util.timefuncs import tnow, tdiffsec
32 class LinuxGRETunnel(LinuxTunnel):
33 _rtype = "LinuxGRETunnel"
34 _help = "Constructs a tunnel between two Linux endpoints using a UDP connection "
37 def log_message(self, msg):
38 return " guid %d - GRE tunnel %s - %s - %s " % (self.guid,
39 self.endpoint1.node.get("hostname"),
40 self.endpoint2.node.get("hostname"),
43 def get_endpoints(self):
44 """ Returns the list of RM that are endpoints to the tunnel
47 for guid in self.connections:
48 rm = self.ec.get_resource(guid)
49 if hasattr(rm, "gre_connect_command"):
53 def initiate_connection(self, endpoint, remote_endpoint):
54 # Return the command to execute to initiate the connection to the
56 connection_run_home = self.run_home(endpoint)
57 gre_connect_command = endpoint.gre_connect_command(
58 remote_endpoint, connection_run_home)
60 # upload command to connect.sh script
61 shfile = os.path.join(self.app_home(endpoint), "gre-connect.sh")
62 endpoint.node.upload(udp_connect_command,
67 # invoke connect script
68 cmd = "bash %s" % shfile
69 (out, err), proc = endpoint.node.run(cmd, self.run_home(endpoint))
71 # check if execution errors occurred
72 msg = " Failed to connect endpoints "
75 self.error(msg, out, err)
76 raise RuntimeError, msg
78 # Wait for pid file to be generated
79 pid, ppid = endpoint.node.wait_pid(self.run_home(endpoint))
81 # If the process is not running, check for error information
82 # on the remote machine
83 if not pid or not ppid:
84 (out, err), proc = endpoint.node.check_errors(self.run_home(endpoint))
85 # Out is what was written in the stderr file
87 msg = " Failed to start command '%s' " % command
88 self.error(msg, out, err)
89 raise RuntimeError, msg
94 def establish_connection(self, endpoint, remote_endpoint, data):
97 def verify_connection(self, endpoint, remote_endpoint):
98 # Execute a ping from both sides to verify that the tunnel works
101 def terminate_connection(self, endpoint, remote_endpoint):
104 def check_state_connection(self, endpoint, remote_endpoint):
105 raise NotImplementedError
107 def valid_connection(self, guid):