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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
The parent class for all the SSH services. Currently implemented services
are ssh-userauth and ssh-connection.
Maintainer: Paul Swartz
"""
from __future__ import division, absolute_import
from twisted.python import log
class SSHService(log.Logger):
name = None # this is the ssh name for the service
protocolMessages = {} # these map #'s -> protocol names
transport = None # gets set later
def serviceStarted(self):
"""
called when the service is active on the transport.
"""
def serviceStopped(self):
"""
called when the service is stopped, either by the connection ending
or by another service being started
"""
def logPrefix(self):
return "SSHService %r on %s" % (self.name,
self.transport.transport.logPrefix())
def packetReceived(self, messageNum, packet):
"""
called when we receive a packet on the transport
"""
#print self.protocolMessages
if messageNum in self.protocolMessages:
messageType = self.protocolMessages[messageNum]
f = getattr(self,'ssh_%s' % messageType[4:],
None)
if f is not None:
return f(packet)
log.msg("couldn't handle %r" % messageNum)
log.msg(repr(packet))
self.transport.sendUnimplemented()