def Connect(self):
"""Makes the connection.
We can have an instance of this class without being connected to the
device, e.g. after a disconnect. Hence setting up the actual SSH connection
should happen in this method, not in the constructor.
"""
try:
if self.ssh_client:
# An SSH client was provided. Use it.
self._ssh_client = self.ssh_client.Connect(
hostname=self._host,
username=self._username,
password=self._password,
ssh_keys=self._ssh_keys,
timeout=self._connect_timeout)
else:
# The Connect() function from the sshclient module is a factory that
# returns a paramiko.SSHClient instance.
self._ssh_client = sshclient.Connect(
hostname=self._host,
username=self._username,
password=self._password,
ssh_keys=self._ssh_keys,
timeout=self._connect_timeout)
except (exceptions.ConnectError, exceptions.AuthenticationError) as e:
raise ConnectionError(str(e))
# We are connected. Now set up pexpect.
logging.debug('SETTING UP PEXPECT')
try:
ssh_channel = self._ssh_client.invoke_shell()
logging.debug('INVOKED A SHELL')
ssh_channel.set_combine_stderr(True)
logging.debug('COMBINED STDERR')
self.child = self._spawn(ssh_channel, maxread=8192)
logging.debug('SPAWNED')
timeout = max(1, self._connect_timeout)
pattern = self.child.expect([self._success], timeout=timeout)
logging.debug('GOT PATTERN: %s', pattern)
if pattern == 0:
self._MaybeFindPrompt()
except pexpect.TIMEOUT:
raise TimeoutError(timeout)
except pexpect.EOF as e:
raise ConnectionError(str(e))
except paramiko.SSHException as e:
msg = 'SSHException connecting to %r: %s' % (self._host, e)
raise ConnectionError(msg)
# Used by _Disconnect in ftos.py and ios.py.
self.exit_list = self.child.compile_pattern_list(pexpect.EOF)
return None
def __init__(self, host, username, password=None):
"""Initializer.
Args:
host: As per parent.
username: As per parent.
password: As per parent.
"""
super(ScpPutConnection, self).__init__(host, username, password)
self._ssh_client = sshclient.Connect(hostname=self._host,
username=self._username,
password=self._password)
self.transport = self._ssh_client.get_transport()
def _Connect(self,
username,
password=None,
ssh_keys=None,
enable_password=None,
ssl_cert_set=None):
_ = ssl_cert_set
logging.debug(
'In Paramiko._Connect, host is %s, self._connected? %s'
'_ssh_client is None? %s', self.host, self._connected,
self._ssh_client is None)
self._username = username
self._password = password or self._password
self._ssh_keys = ssh_keys or self._ssh_keys or ()
self._enable_password = enable_password or self._enable_password
self._ssh_client = sshclient.Connect(hostname=self.loopback_ipv4,
username=self._username,
password=self._password,
port=self._port,
ssh_keys=self._ssh_keys)
return None