def ssh_REQUEST_FAILURE(self, packet):
"""
Our global request failed. Get the appropriate Deferred and errback
it with the packet we received.
"""
self._log.debug("global request failure")
self.deferreds["global"].pop(0).errback(
error.ConchError("global request failed", packet))
def ssh_REQUEST_FAILURE(self, packet):
"""
Our global request failed. Get the appropriate Deferred and errback
it with the packet we received.
"""
log.msg('RF')
self.deferreds['global'].pop(0).errback(
error.ConchError('global request failed', packet))
def _cleanupGlobalDeferreds(self):
"""
All pending requests that have returned a deferred must be errbacked
when this service is stopped, otherwise they might be left uncalled and
uncallable.
"""
for d in self.deferreds["global"]:
d.errback(error.ConchError("Connection stopped."))
del self.deferreds["global"][:]
def ssh_CHANNEL_FAILURE(self, packet):
"""
Our channel request to the other side failed. Payload::
uint32 local channel number
Get the C{Deferred} out of self.deferreds and errback it with a
C{error.ConchError}.
"""
localChannel = struct.unpack(">L", packet[:4])[0]
if self.deferreds.get(localChannel):
d = self.deferreds[localChannel].pop(0)
d.errback(error.ConchError("channel request failed"))
def ssh_CHANNEL_FAILURE(self, packet):
"""
Our channel request to the other side failed. Payload::
uint32 local channel number
Get the C{Deferred} out of self.deferreds and errback it with a
C{error.ConchError}.
"""
localChannel = struct.unpack('>L', packet[:4])[0]
if self.deferreds.get(localChannel):
d = self.deferreds[localChannel].pop(0)
log.callWithLogger(self.channels[localChannel], d.errback,
error.ConchError('channel request failed'))
def ssh_CHANNEL_OPEN_FAILURE(self, packet):
"""
The other side did not accept our MSG_CHANNEL_OPEN request. Payload::
uint32 local channel number
uint32 reason code
string reason description
Find the channel using the local channel number and notify it by
calling its openFailed() method.
"""
localChannel, reasonCode = struct.unpack(">2L", packet[:8])
reasonDesc = common.getNS(packet[8:])[0]
channel = self.channels[localChannel]
del self.channels[localChannel]
channel.conn = self
reason = error.ConchError(reasonDesc, reasonCode)
channel.openFailed(reason)
def channelClosed(self, channel):
"""
Called when a channel is closed.
It clears the local state related to the channel, and calls
channel.closed().
MAKE SURE YOU CALL THIS METHOD, even if you subclass L{SSHConnection}.
If you don't, things will break mysteriously.
@type channel: L{SSHChannel}
"""
if channel in self.channelsToRemoteChannel: # actually open
channel.localClosed = channel.remoteClosed = True
del self.localToRemoteChannel[channel.id]
del self.channels[channel.id]
del self.channelsToRemoteChannel[channel]
for d in self.deferreds.pop(channel.id, []):
d.errback(error.ConchError("Channel closed."))
channel.closed()
def _cbChannelRequest(self, result, localChannel):
"""
Called back if the other side wanted a reply to a channel request. If
the result is true, send a MSG_CHANNEL_SUCCESS. Otherwise, raise
a C{error.ConchError}
@param result: the value returned from the channel's requestReceived()
method. If it's False, the request failed.
@type result: L{bool}
@param localChannel: the local channel ID of the channel to which the
request was made.
@type localChannel: L{int}
@raises ConchError: if the result is False.
"""
if not result:
raise error.ConchError('failed request')
self.transport.sendPacket(
MSG_CHANNEL_SUCCESS,
struct.pack('>L', self.localToRemoteChannel[localChannel]))
def getChannel(self, channelType, windowSize, maxPacket, data):
"""
The other side requested a channel of some sort.
channelType is the type of channel being requested,
windowSize is the initial size of the remote window,
maxPacket is the largest packet we should send,
data is any other packet data (often nothing).
We return a subclass of L{SSHChannel}.
By default, this dispatches to a method 'channel_channelType' with any
non-alphanumerics in the channelType replace with _'s. If it cannot
find a suitable method, it returns an OPEN_UNKNOWN_CHANNEL_TYPE error.
The method is called with arguments of windowSize, maxPacket, data.
@type channelType: L{bytes}
@type windowSize: L{int}
@type maxPacket: L{int}
@type data: L{bytes}
@rtype: subclass of L{SSHChannel}/L{tuple}
"""
self._log.debug("got channel {channelType!r} request",
channelType=channelType)
if hasattr(self.transport, "avatar"): # this is a server!
chan = self.transport.avatar.lookupChannel(channelType, windowSize,
maxPacket, data)
else:
channelType = channelType.translate(TRANSLATE_TABLE)
attr = "channel_%s" % nativeString(channelType)
f = getattr(self, attr, None)
if f is not None:
chan = f(windowSize, maxPacket, data)
else:
chan = None
if chan is None:
raise error.ConchError("unknown channel",
OPEN_UNKNOWN_CHANNEL_TYPE)
else:
chan.conn = self
return chan
