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# pyrpl - DSP servo controller for quantum optics with the RedPitaya
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# Copyright (C) 2014-2016 Leonhard Neuhaus (neuhaus@spectro.jussieu.fr)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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###############################################################################
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import paramiko
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from time import sleep
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from scp import SCPClient
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import logging
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class SshShell(object):
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""" This is a wrapper around paramiko.SSHClient and scp.SCPClient
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I provides a ssh connection with the ability to transfer files over it"""
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def __init__(
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self,
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hostname='localhost',
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user='root',
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password='root',
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delay=0.05,
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timeout=3,
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sshport=22,
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shell=True):
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self._logger = logging.getLogger(name=__name__)
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self.delay = delay
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self.apprunning = False
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self.hostname = hostname
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self.sshport=sshport
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self.user = user
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self.password = password
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self.timeout= timeout
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self.ssh = paramiko.SSHClient()
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self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
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self.ssh.connect(
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hostname,
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username=self.user,
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password=self.password,
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port=self.sshport,
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timeout=timeout)
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if shell:
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self.channel = self.ssh.invoke_shell()
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self.startscp()
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def startscp(self):
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self.scp = SCPClient(self.ssh.get_transport())
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def write(self, text):
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if self.channel.send_ready() and not text == "":
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return self.channel.send(text)
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else:
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return -1
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def read_nbytes(self, nbytes):
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if self.channel.recv_ready():
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return self.channel.recv(nbytes)
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else:
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return b""
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def read(self):
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sumstring = ""
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while True:
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string = self.read_nbytes(1024).decode('utf-8')
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sumstring += string
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if not string:
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break
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self._logger.debug(sumstring)
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return sumstring
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def askraw(self, question=""):
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self.write(question)
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sleep(self.delay)
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return self.read()
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def ask(self, question=""):
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return self.askraw(question + '\n')
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def __del__(self):
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self.endapp()
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try:
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self.channel.close()
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except AttributeError:
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pass # already broken
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self.ssh.close()
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def endapp(self):
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pass
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def reboot(self):
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self.endapp()
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self.ask("shutdown -r now")
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self.__del__()
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def shutdown(self):
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self.endapp()
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self.ask("shutdown now")
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self.__del__()
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def get_mac_addresses(self):
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"""
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returns all MAC addresses of the SSH device.
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"""
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macs = list()
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nextgood = False
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for token in self.ask('ifconfig | grep HWaddr').split():
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if nextgood and len(token.split(':'))==6:
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macs.append(token)
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if token == 'HWaddr':
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nextgood = True
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else:
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nextgood = False
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return macs
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lneuhaus