failed to negotiate protocol

[razaqq]

Trying to connect, but ending up with the following errors. depending on the flags i use.

$ rdesktop -g 100% -P -z -x l -r sound:off -u User ip:port
Autoselected keyboard map en-us
Failed to negotiate protocol, retrying with plain RDP.
NOT IMPLEMENTED: PDU 13
ERROR: rdp.c:128: rdp_recv(), unexpected stream overrun

followed by a bunch of hex codes.

without compression:

$ rdesktop -g 100% -P -x l -r sound:off -u User ip:port
Autoselected keyboard map en-us
Failed to negotiate protocol, retrying with plain RDP.
ERROR: xmalloc -583575531

without compression and lan mode:

$ rdesktop -g 100% -P -u User ip:port              
Autoselected keyboard map en-us
Failed to negotiate protocol, retrying with plain RDP.
ERROR: Protocol error in server redirection, unexpected data.ERROR: rdp.c:284: rdp_in_unistr(), consume of unicode data from stream would overrun

followed again by hex codes

and finally without bitmap caching:

rdesktop -g 100% -u User ip:port
Autoselected keyboard map en-us
Failed to negotiate protocol, retrying with plain RDP.
ERROR: rdp.c:1123: process_demand_active(), consume of source descriptor from stream would overrun

Target OS: Windows 10 x86_64
Client OS: Arch Linux with kernel 4.19.53-1-lts x86_64
Client version: 1.8.6

If you need any more information I forgot to add, just lmk

[CendioOssman]

Could you test with the current 1.8.x branch? Or with master? There has been another fix since 1.8.6.

[razaqq]

okay so i compiled master branch from source and its got giving me the same error anymore.
Im actually getting to the password prompt but am greeted afterwards by this error:

Autoselecting keyboard map 'en-us' from locale
Password: 
Protocol(warning): Protocol negotiation failed with reason: SSL not allowed by server
Retrying with plain RDP.
Protocol(error): rdp.c:184: rdp_recv(), not enough data for PDU

I tried disabling encryption with first -e, then -E and then both. However got this error then:

Autoselecting keyboard map 'en-us' from locale
Password: 
Protocol(warning): Protocol negotiation failed with reason: SSL not allowed by server
Retrying with plain RDP.
Core(error): tcp_recv(), recv() failed: Connection reset by peer

Just to clarifiy: Other rdp clients like remmina and xfreerdp work, so its not a server side issue.

[tropikhajma]

I'm observing the same thing trying to connect to a VirtualBox VM.
I'm on Mageia Linux 7, rdesktop 1.8.5

[CendioOssman]

VirtualBox is handled on #319, and let's merge all the plain RDP problems on #320.