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# -*- test-case-name: twisted.conch.test.test_conch -*-
from zope.interface import implementer
from twisted.conch.error import ConchError
from twisted.conch.interfaces import IConchUser
from twisted.conch.ssh.connection import OPEN_UNKNOWN_CHANNEL_TYPE
from twisted.logger import Logger
from twisted.python.compat import nativeString
@implementer(IConchUser)
class ConchUser:
_log = Logger()
def __init__(self):
self.channelLookup = {}
self.subsystemLookup = {}
@property
def conn(self):
return self._conn
@conn.setter
def conn(self, value):
self._conn = value
def lookupChannel(self, channelType, windowSize, maxPacket, data):
klass = self.channelLookup.get(channelType, None)
if not klass:
raise ConchError(OPEN_UNKNOWN_CHANNEL_TYPE, "unknown channel")
else:
return klass(
remoteWindow=windowSize,
remoteMaxPacket=maxPacket,
data=data,
avatar=self,
)
def lookupSubsystem(self, subsystem, data):
self._log.debug(
"Subsystem lookup: {subsystem!r}", subsystem=self.subsystemLookup
)
klass = self.subsystemLookup.get(subsystem, None)
if not klass:
return False
return klass(data, avatar=self)
def gotGlobalRequest(self, requestType, data):
# XXX should this use method dispatch?
requestType = nativeString(requestType.replace(b"-", b"_"))
f = getattr(self, "global_%s" % requestType, None)
if not f:
return 0
return f(data)
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