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Posted to dev@mina.apache.org by "Goldstein Lyor (JIRA)" <ji...@apache.org> on 2016/01/05 14:46:39 UTC
[jira] [Comment Edited] (SSHD-614) SCP upload fails with dropbear
server (aka server with paket size limitation)
[ https://issues.apache.org/jira/browse/SSHD-614?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15083064#comment-15083064 ]
Goldstein Lyor edited comment on SSHD-614 at 1/5/16 1:46 PM:
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Actually, it supports keyboard-interactive, but I understand now what you mean. I added a _-w ...password..._ command line option that you can use in order to specify a password. Just get the latest version and check it out.
was (Author: lgoldstein):
Actually, it supports keyboard-interactive, but I understand now what you mean. I added a -w ...password..._ command line option that you can use in order to specify a password. Just get the latest version and check it out.
> SCP upload fails with dropbear server (aka server with paket size limitation)
> -----------------------------------------------------------------------------
>
> Key: SSHD-614
> URL: https://issues.apache.org/jira/browse/SSHD-614
> Project: MINA SSHD
> Issue Type: Bug
> Reporter: Oliver Stöneberg
> Priority: Minor
> Attachments: dropbear_not_working.log, openssh_working.log
>
>
> When trying to upload a file via SCP to a server running dropbear I get the following error:
> java.io.EOFException: readAck - EOF before ACK -
> at org.apache.sshd.common.scp.ScpHelper.readAck() in ScpHelper.java:703.
> at org.apache.sshd.common.scp.ScpHelper.sendStream() in ScpHelper.java:539.
> at org.apache.sshd.client.scp.DefaultScpClient.upload() in DefaultScpClient.java:104.
> at org.apache.sshd.client.scp.AbstractScpClient.upload() in AbstractScpClient.java:201.
> The main difference between dropbear and OpenSSH I have encountered is that dropbear has a paket size limitation in place by default. That's the reason in the first place why I even need to upload files via SCP since using trying to execute bigger scripts via an exec channel it will fail. I attached logs from the system that fails and another system. The main difference seems to be this:
> working (OpenSSH):
> DEBUG [sshd-SshClient[51a8313b]-nio2-thread-9] (AbstractConnectionService.java:236) channelOpenConfirmation(ChannelExec[id=0, recipient=-1]-ClientSessionImpl[sshtest@XXXXXXXXX.XXXX.XXX/XX.XX.XX.XXX:22]) Received SSH_MSG_CHANNEL_OPEN_CONFIRMATION recipient=
> DEBUG [sshd-SshClient[51a8313b]-nio2-thread-9] (AbstractChannel.java:121) setRecipient(ChannelExec[id=0, recipient=-1]-ClientSessionImpl[sshtest@XXXXXXXXX.XXXX.XXX/XX.XX.XX.XXX:22]) recipient=0
> DEBUG [sshd-SshClient[51a8313b]-nio2-thread-9] (Window.java:122) init(ChannelExec[id=0, recipient=0]-ClientSessionImpl[sshtest@XXXXXXXXX.XXXX.XXX/XX.XX.XX.XXX:22]: client remote window) size=0, max.=0, packet=32768
> DEBUG [sshd-SshClient[51a8313b]-nio2-thread-9] (ChannelExec.java:47) doOpen(ChannelExec[id=0, recipient=0]-ClientSessionImpl[sshtest@XXXXXXXXX.XXXX.XXX/XX.XX.XX.XXX:22]) send SSH_MSG_CHANNEL_REQUEST exec command=scp -p -t -- /tmp/XXXXX_script.sh
> not working (dropbear):
> DEBUG [sshd-SshClient[11389053]-nio2-thread-7] (AbstractConnectionService.java:236) channelOpenConfirmation(ChannelExec[id=0, recipient=-1]-ClientSessionImpl[test@/XX.XX.XX.XXX:44]) Received SSH_MSG_CHANNEL_OPEN_CONFIRMATION recipient=
> DEBUG [sshd-SshClient[11389053]-nio2-thread-7] (AbstractChannel.java:121) setRecipient(ChannelExec[id=0, recipient=-1]-ClientSessionImpl[test@/XX.XX.XX.XXX:44]) recipient=0
> DEBUG [sshd-SshClient[11389053]-nio2-thread-7] (Window.java:122) init(ChannelExec[id=0, recipient=0]-ClientSessionImpl[test@/XX.XX.XX.XXX:44]: client remote window) size=24576, max.=24576, packet=32759
> DEBUG [sshd-SshClient[11389053]-nio2-thread-7] (ChannelExec.java:47) doOpen(ChannelExec[id=0, recipient=0]-ClientSessionImpl[test@/XX.XX.XX.XXX:44]) send SSH_MSG_CHANNEL_REQUEST exec command=scp -p -t -- /tmp/XXXXX_script.sh
> As you can see that's a min/max set for the not working dropbear.
> There's also two typos in this log message (the additional whitespace at "client local" and the period at "max":
> DEBUG [forceDeviceActionAsync] (Window.java:122) init(ChannelExec[id=0, recipient=-1]-ClientSessionImpl[test@/10.48.43.214:44]: client local window) size=2097152, max.=2097152, packet=32768
> I am using the latest version of master.
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