Thanks for the quick reply Mike!
I did try to find the error on the public email archive along with the
JIRA. So I guess that is why I couldn't find it...
Just to be clear, by Custom SVC you mean: Custom Service, I am not.
This is the current scenario:
* Guacd and Guacamole Client 1.4.0 running on an Ubuntu Server 20.04.
* I am connecting to a Windows 10 RDP fully patched to June 2022.
* Connecting to Guacamole with MS Edge Versión 103.0.1264.49 (64 Bits)
* Simple guacamole config using only the user-mapping.xml file.
* This is the connection as configured on the above file:
<connection name="Win10">
<protocol>rdp</protocol>
<param name="hostname">172.16.100.220</param>
<param name="port">3389</param>
<param name="username">user</param>
<param name="password">password</param>
<param name="ignore-cert">true</param>
<param name="enable-drive">true</param>
<param name="drive-name">Training2021</param>
<param name="drive-path">/root/user</param>
</connection>
* I am ashamed to say that I am running Guacamole as root. But that is
another email thread.
To reproduce the error, I try to place the file in two ways, both fail:
* Copy and paste on the Guacamole RDP connection from the Win10 Folder to
the Guacamole Shared Drive.
- The file is apparently uploaded but it is immediately downloaded on the
MS Edge browser. The file is not shown at all.
* Upload with the Context Menu: CTRL+ALT+SHIFT, Upload and there is a
permissions error: You don't have permissions to upload this file. If you
need access, please verify the system configuration or contact the system
administrator.
- After doing this, an empty file appears on the share with the right name.
It is quite easy to reproduce. I can enable debug if this can provide
additional information.
Thanks again for the quick reply, please feel free to let me know how can I
assist in finding the cause or which configuration parameter, if any, I
have to change.
Regards,
David.
On Fri, Jul 15, 2022 at 7:40 PM Michael Jumper <[email protected]> wrote:
> What you're seeing has nothing to do with Tomcat, nor with file uploads,
> but with the size of the data sent by the RDP server to Guacamole and the
> limits built into guacd. The SVC implementation within guac's RDP support
> has a built-in limit of 1 MB per received PDU:
>
>
> https://github.com/apache/guacamole-server/blob/b2ae2fdf003a6854ac42877ce0fce8e88ceb038a/src/protocols/rdp/channels/common-svc.h#L37-L42
>
> The warning you're seeing is from here:
>
>
> https://github.com/apache/guacamole-server/blob/b2ae2fdf003a6854ac42877ce0fce8e88ceb038a/src/protocols/rdp/plugins/guac-common-svc/guac-common-svc.c#L114-L122
>
> I've not seen this before with any standard RDP channel. Are you doing
> anything else within the connection in question? Any custom SVC?
>
> - Mike
>
>
> On Fri, Jul 15, 2022 at 5:31 PM David Ramirez <[email protected]> wrote:
>
>> Hi to all! I've been using Guacamole for a while for training gateway
>> purposes and it is just great! Thanks for an amazing open source product!
>> Now I am writing because I need help from the Gurus. I know it is a
>> configuration parameter that will likely has to be added to:
>> /var/lib/tomcat9/web-apps/guacamole/WEB-INF/web.xml
>> But it has been decades since I've configured Tomcat9 directly and I am
>> afraid that any change that I do will break things further.
>> The error itself is self explanatory:
>> Jul 15 18:16:20 suppod-1 guacd[2253]: RDP server has requested to send a
>> sequence of 1048632 bytes, but this exceeds the maximum buffer space of
>> 1048576 bytes. Received data may be truncated.
>>
>> When looking on the Guacamole documentation, nothing is mentioned that I
>> could find.
>> When going to the Tomcat9 documentation I found some parameters to
>> modify, all on the web.xml file but as I said, I do not know where to do it
>> on the guacamole WEB-INF/web.xml file.
>> The parameter that *looked to me* that may be the one is the following:
>> <init-param>
>> <param-name>buffered</param-name>
>> <param-value>1</param-value>
>> </init-param>
>>
>> As the limit described on the error is 1MB.
>>
>> I understand this may be a silly question, if anyone could point me in
>> the right direction would be really appreciated.
>> Thanks for any assistance you may provide!
>> David.
>>
>> For reference, here is a more complete section of the log with the error.
>> The filename TokenDistributionPKG.zip file is the one I am trying to upload.
>>
>> Jul 15 18:15:58 suppod-1 guacd[2253]: File open refused (-2):
>> "\desktop.ini"
>> Jul 15 18:16:00 suppod-1 guacd[2253]: File open refused (-2):
>> "\Download\desktop.ini"
>> Jul 15 18:16:20 suppod-1 guacd[2253]: RDP server has requested to send a
>> sequence of 1048632 bytes, but this exceeds the maximum buffer space of
>> 1048576 bytes. Received data may be truncated.
>> Jul 15 18:16:33 suppod-1 guacd[2253]: message repeated 27 times: [ RDP
>> server has requested to send a sequence of 1048632 bytes, but this exceeds
>> the maximum buffer space of 1048576 bytes. Received data may be truncated.]
>> Jul 15 18:16:34 suppod-1 guacd[2253]: File open refused (-2):
>> "\Download\TokenDistributionPKG.zip:Zone.Identifier"
>> Jul 15 18:16:34 suppod-1 guacd[2253]: File open refused (-2):
>> "\Download\TokenDistributionPKG.zip:Zone.Identifier"
>> Jul 15 18:16:34 suppod-1 guacd[2253]: File open refused (-2):
>> "\Download\TokenDistributionPKG.zip"
>> Jul 15 18:16:35 suppod-1 guacd[2253]: message repeated 2 times: [ File
>> open refused (-2): "\Download\TokenDistributionPKG.zip"]
>> Jul 15 18:16:56 suppod-1 guacd[2253]: RDP server has requested to send a
>> sequence of 1048632 bytes, but this exceeds the maximum buffer space of
>> 1048576 bytes. Received data may be truncated.
>> Jul 15 18:17:13 suppod-1 guacd[2253]: message repeated 27 times: [ RDP
>> server has requested to send a sequence of 1048632 bytes, but this exceeds
>> the maximum buffer space of 1048576 bytes. Received data may be truncated.]
>> Jul 15 18:17:14 suppod-1 guacd[2253]: File open refused (-2):
>> "\TokenDistributionPKG.zip:Zone.Identifier"
>> Jul 15 18:17:14 suppod-1 guacd[2253]: File open refused (-2):
>> "\TokenDistributionPKG.zip:Zone.Identifier"
>> Jul 15 18:17:22 suppod-1 guacd[2253]: Accepted format: 16-bit PCM with 2
>> channels at 44100 Hz
>> Jul 15 18:17:47 suppod-1 guacd[2253]: File open refused (-2):
>> "\TokenDistributionPKG.zip"
>> Jul 15 18:17:55 suppod-1 guacd[2217]: User
>> "@3f34a609-c8da-417b-af58-a4fc2e9df733" disconnected (0 users remain)
>> Jul 15 18:17:55 suppod-1 guacd[2217]: Last user of connection
>> "$5280a8eb-b216-4fa4-8fdd-1d7421630bfd" disconnected
>> Jul 15 18:17:55 suppod-1 tomcat9[675]: 18:17:55.502
>> [http-nio-8080-exec-6] INFO o.a.g.tunnel.TunnelRequestService - User
>> "trapx" disconnected from connection "Win10Token". Duration: 1284470
>> milliseconds
>> Jul 15 18:17:55 suppod-1 tomcat9[675]: Exception in thread "Thread-8"
>> java.lang.IllegalStateException: Message will not be sent because the
>> WebSocket session has been closed
>> Jul 15 18:17:55 suppod-1 tomcat9[675]: #011at
>> org.apache.tomcat.websocket.WsRemoteEndpointImplBase.writeMessagePart(WsRemoteEndpointImplBase.java:430)
>> Jul 15 18:17:55 suppod-1 tomcat9[675]: #011at
>> org.apache.tomcat.websocket.WsRemoteEndpointImplBase.sendMessageBlock(WsRemoteEndpointImplBase.java:309)
>> Jul 15 18:17:55 suppod-1 tomcat9[675]: #011at
>> org.apache.tomcat.websocket.WsRemoteEndpointImplBase.sendMessageBlock(WsRemoteEndpointImplBase.java:250)
>> Jul 15 18:17:55 suppod-1 tomcat9[675]: #011at
>> org.apache.tomcat.websocket.WsRemoteEndpointImplBase.sendString(WsRemoteEndpointImplBase.java:191)
>> Jul 15 18:17:55 suppod-1 tomcat9[675]: #011at
>> org.apache.tomcat.websocket.WsRemoteEndpointBasic.sendText(WsRemoteEndpointBasic.java:37)
>> Jul 15 18:17:55 suppod-1 tomcat9[675]: #011at
>> org.apache.guacamole.websocket.GuacamoleWebSocketTunnelEndpoint.sendInstruction(GuacamoleWebSocketTunnelEndpoint.java:152)
>> Jul 15 18:17:55 suppod-1 tomcat9[675]: #011at
>> org.apache.guacamole.websocket.GuacamoleWebSocketTunnelEndpoint.access$200(GuacamoleWebSocketTunnelEndpoint.java:53)
>> Jul 15 18:17:55 suppod-1 tomcat9[675]: #011at
>> org.apache.guacamole.websocket.GuacamoleWebSocketTunnelEndpoint$2.run(GuacamoleWebSocketTunnelEndpoint.java:253)
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> resumed (module 'builtin:omfile') [v8.2001.0 try
>> https://www.rsyslog.com/e/2359 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> suspended (module 'builtin:omfile'), retry 0. There should be messages
>> before this one giving the reason for suspension. [v8.2001.0 try
>> https://www.rsyslog.com/e/2007 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> resumed (module 'builtin:omfile') [v8.2001.0 try
>> https://www.rsyslog.com/e/2359 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> suspended (module 'builtin:omfile'), retry 0. There should be messages
>> before this one giving the reason for suspension. [v8.2001.0 try
>> https://www.rsyslog.com/e/2007 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> resumed (module 'builtin:omfile') [v8.2001.0 try
>> https://www.rsyslog.com/e/2359 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> suspended (module 'builtin:omfile'), retry 0. There should be messages
>> before this one giving the reason for suspension. [v8.2001.0 try
>> https://www.rsyslog.com/e/2007 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> resumed (module 'builtin:omfile') [v8.2001.0 try
>> https://www.rsyslog.com/e/2359 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> suspended (module 'builtin:omfile'), retry 0. There should be messages
>> before this one giving the reason for suspension. [v8.2001.0 try
>> https://www.rsyslog.com/e/2007 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> resumed (module 'builtin:omfile') [v8.2001.0 try
>> https://www.rsyslog.com/e/2359 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> suspended (module 'builtin:omfile'), retry 0. There should be messages
>> before this one giving the reason for suspension. [v8.2001.0 try
>> https://www.rsyslog.com/e/2007 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> resumed (module 'builtin:omfile') [v8.2001.0 try
>> https://www.rsyslog.com/e/2359 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> suspended (module 'builtin:omfile'), retry 0. There should be messages
>> before this one giving the reason for suspension. [v8.2001.0 try
>> https://www.rsyslog.com/e/2007 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> resumed (module 'builtin:omfile') [v8.2001.0 try
>> https://www.rsyslog.com/e/2359 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> suspended (module 'builtin:omfile'), retry 0. There should be messages
>> before this one giving the reason for suspension. [v8.2001.0 try
>> https://www.rsyslog.com/e/2007 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> resumed (module 'builtin:omfile') [v8.2001.0 try
>> https://www.rsyslog.com/e/2359 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> suspended (module 'builtin:omfile'), retry 0. There should be messages
>> before this one giving the reason for suspension. [v8.2001.0 try
>> https://www.rsyslog.com/e/2007 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> resumed (module 'builtin:omfile') [v8.2001.0 try
>> https://www.rsyslog.com/e/2359 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> suspended (module 'builtin:omfile'), retry 0. There should be messages
>> before this one giving the reason for suspension. [v8.2001.0 try
>> https://www.rsyslog.com/e/2007 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> resumed (module 'builtin:omfile') [v8.2001.0 try
>> https://www.rsyslog.com/e/2359 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> suspended (module 'builtin:omfile'), retry 0. There should be messages
>> before this one giving the reason for suspension. [v8.2001.0 try
>> https://www.rsyslog.com/e/2007 ]
>> Jul 15 18:17:55 suppod-1 rsyslogd: action 'action-8-builtin:omfile'
>> suspended (module 'builtin:omfile'), next retry is Fri Jul 15 18:18:25
>> 2022, retry nbr 0. There should be messages before this one giving the
>> reason for suspension. [v8.2001.0 try https://www.rsyslog.com/e/2007 ]
>> Jul 15 18:17:55 suppod-1 guacd[2217]: Internal RDP client disconnected
>> Jul 15 18:17:55 suppod-1 guacd[582]: Connection
>> "$5280a8eb-b216-4fa4-8fdd-1d7421630bfd" removed.
>> Jul 15 18:17:56 suppod-1 guacd[2106]: User
>> "@d0d18747-c276-4420-9662-4550f1b907f7" disconnected (0 users remain)
>> Jul 15 18:17:56 suppod-1 guacd[2106]: Last user of connection
>> "$10b8ed36-f0fc-4dc7-a936-7a8386963f4e" disconnected
>>
>
