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.trace import Trace, TraceAttr
22 from nepi.execution.resource import clsinit_copy, ResourceState, \
23 ResourceAction, reschedule_delay
24 from nepi.resources.linux.application import LinuxApplication
25 from nepi.resources.linux.ccn.ccnd import LinuxCCND
26 from nepi.util.timefuncs import tnow
31 # TODO: Add rest of options for ccndc!!!
32 # Implement ENTRY DELETE!!
35 class LinuxFIBEntry(LinuxApplication):
36 _rtype = "LinuxFIBEntry"
39 def _register_attributes(cls):
40 uri = Attribute("uri",
41 "URI prefix to match and route for this FIB entry",
43 flags = Flags.ExecReadOnly)
45 protocol = Attribute("protocol",
46 "Transport protocol used in network connection to peer "
47 "for this FIB entry. One of 'udp' or 'tcp'.",
48 type = Types.Enumerate,
50 allowed = ["udp", "tcp"],
51 flags = Flags.ExecReadOnly)
53 host = Attribute("host",
54 "Peer host used in network connection for this FIB entry. ",
55 flags = Flags.ExecReadOnly)
57 port = Attribute("port",
58 "Peer port address used in network connection to peer "
59 "for this FIB entry.",
60 flags = Flags.ExecReadOnly)
62 cls._register_attribute(uri)
63 cls._register_attribute(protocol)
64 cls._register_attribute(host)
65 cls._register_attribute(port)
68 def _register_traces(cls):
69 ping = Trace("ping", "Continuous ping to the peer end")
71 cls._register_trace(ping)
73 def __init__(self, ec, guid):
74 super(LinuxFIBEntry, self).__init__(ec, guid)
75 self._home = "fib-%s" % self.guid
79 ccnd = self.get_connected(LinuxCCND.rtype())
80 if ccnd: return ccnd[0]
85 if self.ccnd: return self.ccnd.node
89 # Wait until associated ccnd is provisioned
90 if not self.ccnd or self.ccnd.state < ResourceState.READY:
91 # ccnr needs to wait until ccnd is deployed and running
92 self.ec.schedule(reschedule_delay, self.deploy)
95 if not self.get("command"):
96 self.set("command", self._start_command)
98 if not self.get("env"):
99 self.set("env", self._environment)
101 command = self.get("command")
103 self.info("Deploying command '%s' " % command)
112 self.debug("----- READY ---- ")
113 self._ready_time = tnow()
114 self._state = ResourceState.READY
116 def upload_start_command(self):
117 command = self.get("command")
118 env = self.get("env")
121 # We want to make sure the FIB entries are created
122 # before the experiment starts.
123 # Run the command as a bash script in the background,
124 # in the host ( but wait until the command has
125 # finished to continue )
126 env = env and self.replace_paths(env)
127 command = self.replace_paths(command)
129 (out, err), proc = self.execute_command(command, env)
132 self._state = ResourceState.FAILED
133 msg = "Failed to execute command"
134 self.error(msg, out, err)
135 raise RuntimeError, msg
138 if not self.trace_enabled("ping"):
141 command = """ping %s""" % self.get("host")
142 (out, err), proc = self.node.run(command, self.run_home,
144 stderr = "ping_stderr",
145 pidfile = "ping_pidfile")
147 # Wait for pid file to be generated
148 pid, ppid = self.node.wait_pid(self.run_home, "ping_pidfile")
150 # If the process is not running, check for error information
151 # on the remote machine
152 if not pid or not ppid:
153 (out, err), proc = self.node.check_errors(self.run_home,
154 stderr = "ping_pidfile")
156 # Out is what was written in the stderr file
159 msg = " Failed to deploy ping trace command '%s' " % command
160 self.error(msg, out, err)
161 raise RuntimeError, msg
164 if self._state in [ResourceState.READY, ResourceState.STARTED]:
165 command = self.get("command")
166 self.info("Starting command '%s'" % command)
168 self._start_time = tnow()
169 self._state = ResourceState.STARTED
171 msg = " Failed to execute command '%s'" % command
172 self.error(msg, out, err)
173 self._state = ResourceState.FAILED
174 raise RuntimeError, msg
177 command = self.get('command')
178 env = self.get('env')
180 if self.state == ResourceState.STARTED:
181 self.info("Stopping command '%s'" % command)
183 command = self._stop_command
184 (out, err), proc = self.execute_command(command, env)
189 # now stop the ping trace
190 if self.trace_enabled("ping"):
191 pid, ppid = self.node.wait_pid(self.run_home, "ping_pidfile")
192 (out, err), proc = self.node.kill(pid, ppid)
194 self._stop_time = tnow()
195 self._state = ResourceState.STOPPED
202 def _start_command(self):
203 uri = self.get("uri") or ""
204 protocol = self.get("protocol") or ""
205 host = self.get("host") or ""
206 port = self.get("port") or ""
208 # add ccnx:/example.com/ udp 224.0.0.204 52428
209 return "ccndc add %(uri)s %(protocol)s %(host)s %(port)s" % ({
211 "protocol": protocol,
217 def _stop_command(self):
218 uri = self.get("uri") or ""
219 protocol = self.get("protocol") or ""
220 host = self.get("host") or ""
221 port = self.get("port") or ""
223 # add ccnx:/example.com/ udp 224.0.0.204 52428
224 return "ccndc del %(uri)s %(protocol)s %(host)s %(port)s" % ({
226 "protocol": protocol,
232 def _environment(self):
233 return self.ccnd.path
235 def valid_connection(self, guid):