- def initiate_udp_connection(self, remote_endpoint, connection_app_home,
- connection_run_home, cipher, cipher_key, bwlimit, txqueuelen):
- port = self.udp_connect(remote_endpoint, connection_app_home,
- connection_run_home, cipher, cipher_key, bwlimit, txqueuelen)
- return port
-
- def udp_connect(self, remote_endpoint, connection_app_home,
- connection_run_home, cipher, cipher_key, bwlimit, txqueuelen):
- udp_connect_command = self._udp_connect_command(
- remote_endpoint, connection_run_home,
- cipher, cipher_key, bwlimit, txqueuelen)
-
- # upload command to connect.sh script
- shfile = os.path.join(self.app_home, "udp-connect.sh")
- self.node.upload_command(udp_connect_command,
- shfile = shfile,
- overwrite = False)
-
- # invoke connect script
- cmd = "bash %s" % shfile
- (out, err), proc = self.node.run(cmd, self.run_home)
-
- # 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
- self._pid, self._ppid = self.node.wait_pid(self.run_home)
-
- # If the process is not running, check for error information
- # on the remote machine
- if not self._pid or not self._ppid:
- (out, err), proc = self.node.check_errors(self.run_home)
- # 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
-
- port = self.wait_local_port()
-
- return port
-
- def _udp_connect_command(self, remote_endpoint, connection_run_home,
- cipher, cipher_key, bwlimit, txqueuelen):
-
- # Set the remote endpoint, (private) IP of the device
- self.set("pointopoint", remote_endpoint.get("ip"))
-
- # Public IP of the node
- remote_ip = remote_endpoint.node.get("ip")
-
- local_port_file = os.path.join(self.run_home,
- "local_port")
-
- remote_port_file = os.path.join(self.run_home,
- "remote_port")
-
- ret_file = os.path.join(self.run_home,
- "ret_file")
-
- # Generate UDP connect command
- # Use pl-vif-up.py script to configure TAP with peer info
- vif_up_command = self._vif_up_command
-
- command = ["( "]
- command.append(vif_up_command)
-
- # Use pl-vid-udp-connect.py to stablish the tunnel between endpoints
- command.append(") & (")
- command.append("sudo -S")
- command.append("PYTHONPATH=$PYTHONPATH:${SRC}")
- command.append("python ${SRC}/pl-vif-udp-connect.py")
- command.append("-t %s" % self.vif_type)
- command.append("-S %s " % self.sock_name)
- command.append("-l %s " % local_port_file)
- command.append("-r %s " % remote_port_file)
- command.append("-H %s " % remote_ip)
- command.append("-R %s " % ret_file)
- if cipher:
- command.append("-c %s " % cipher)
- if cipher_key:
- command.append("-k %s " % cipher_key)
- if txqueuelen:
- command.append("-q %s " % txqueuelen)
- if bwlimit:
- command.append("-b %s " % bwlimit)
-
- command.append(")")
-
- command = " ".join(command)
- command = self.replace_paths(command)
-
- return command
-
- def establish_udp_connection(self, remote_endpoint, port):
- # upload remote port number to file
- rem_port = "%s\n" % port
- self.node.upload(rem_port,
- os.path.join(self.run_home, "remote_port"),
- text = True,
- overwrite = False)
-
- def verify_connection(self):
- self.wait_result()
-
- def terminate_connection(self):
- if self._pid and self._ppid:
- (out, err), proc = self.node.kill(self._pid, self._ppid,
- sudo = True)
-
- # check if execution errors occurred
- if proc.poll() and err:
- msg = " Failed to Kill the Tap"
- self.error(msg, out, err)
- raise RuntimeError, msg
-
- def check_status(self):
- return self.node.status(self._pid, self._ppid)
-
- def wait_local_port(self):
- """ Waits until the local_port file for the endpoint is generated,
- and returns the port number
-
- """
- return self.wait_file("local_port")
-
- def wait_result(self):
- """ Waits until the return code file for the endpoint is generated
-
- """
- return self.wait_file("ret_file")
-
- def wait_file(self, filename):
- """ Waits until file on endpoint is generated """
- result = None
- delay = 1.0
-
- for i in xrange(20):
- (out, err), proc = self.node.check_output(
- self.run_home, filename)
- if out:
- result = out.strip()
- break
- else:
- time.sleep(delay)
- delay = delay * 1.5
- else:
- msg = "Couldn't retrieve %s" % filename
- self.error(msg, out, err)
- raise RuntimeError, msg
-
- return result
-
- def _gre_connect_command(self, remote_endpoint, connection_run_home):