Windows 10 RDS is quite relaxed about missing channel join PDUs,
whereas we have to adhere quite tightly to the specification to
make sure we get a TLS "Client hello" where appropriate. This makes
us incompatible with older RDP clients. For example, the Wyse sx0
thin client does not send a channel join PDU for the user channel.
Older, non-TLS versions of xrdp supported these devices.
This commit re-implements the xrdp v0.6.1 behaviour for non-TLS
connections only, allowing system administrators to use these devices
on trusted networks. These devices are in any case too old to
establish a modern TLS connection.
- Eliminate duplicaiton for display_size_description
- monitorCount needs to be uint32_t
- width/height -> session_width/session_height
- Update CLIENT_INFO_CURRENT_VERSION
- Also some misc unit test updates.
- Minor log updates.
There are two places where monitor descriptions are passed through the
RDP protocol:
- TS_UD_CS_MONITOR ([MS-RDPBCGR] 2.2.1.3.6 Client Monitor Data)
- DISPLAYCONTROL_PDU_TYPE_MONITOR_LAYOUT ([MS-RDPEDISP] 2.2.2.2)
The processing logic for both of them is similar enough that they should be unified.
Also update to define the constants for the maximum and minimum desktop width/height for monitors and total area.
Also a large number of clarifications for the constants and protocol
requirements.
Note that this is also the first step to making resizing work with the extension GFX channel as well as an important
foundational step to enable HiDPI compatibility.
Also some misc logging updates.
* Added s_rem(s) for getting the remaining bytes in a stream
* Added s_rem_out() macro
* Fixed 15bpp pointer error checking
* Combined the 512 and 2048 bit certificate sending code paths
* Other detailed comments and logging added following MS-RDPBCGR
remove not used chansrv <-> xrdp messages
move static channel disable control into libxrdp
remove some blocking read, write chansrv calls
add drdynvc calls to libxrdp
add drdynvc calls to chansrv
channel cleanup
