Fulvio Cavarretta created SSHD-800:
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Summary: SSHD port forwarding. Wrong SSH_MSG_CHANNEL_FAILURE
Key: SSHD-800
URL: https://issues.apache.org/jira/browse/SSHD-800
Project: MINA SSHD
Issue Type: Bug
Affects Versions: 1.7.0
Reporter: Fulvio Cavarretta
Hi in case the SSHD server receives a message for a not existing channel, it
sends back a _SSH_MSG_CHANNEL_FAILURE_.
This behaviour is not described in RFC4254, which, I agree, is unclear about
what should be do in this case.
Since the current SSHD implementation send back a _SSH_MSG_CHANNEL_FAILURE_
message (with the local channel id), in our environment, it put the receipient
in an inconsistent state.
In out enviroment happened that the receipient has sent a
_SSH_MSG_CHANNEL_DATA_ while SSHD had already closed the channel.
I fully agree that this should not happen (I will open another issue about
this) but the _SSH_MSG_CHANNEL_FAILURE_ further complicates things.
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