[GUACAMOLE-943] F1-F24 keys send incorrect control sequence for SSH/Telnet

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 1.1.0
• Component/s: Terminal
• Environment: RHEL 7
• Assignee: Unassigned
• Reporter: John Filo
• Created: 03/Feb/20 23:46
• Updated: 22/Jun/22 07:30

Description

We are using Guacamole with SSH connections and we have an application that requires Shift-Fn keys mapped through for Shift-Fn1 to Shift-Fn24.

On the target SSH server, if I use `showkey -a` it shows that Fn1 and Shift-Fn1 map through as:

sh-4.2$ showkey -a

Press any keys - Ctrl-D will terminate this program

Fn1 is

^[OP 27 0033 0x1b 
     79 0117 0x4f
     80 0120 0x50

Shift-Fn1 is 

^[[1;2P          27 0033 0x1b
         91 0133 0x5b
         49 0061 0x31
         59 0073 0x3b
         50 0062 0x32
         80 0120 0x50

Whereas, via Guacamole Client, if I use `showkey -a` it shows that Fn1 and Shift-Fn1 map through as:

sh-4.2$ showkey -a

Press any keys - Ctrl-D will terminate this program

Fn1 is 

^[[[A 27 0033 0x1b
      91 0133 0x5b
      91 0133 0x5b
      65 0101 0x41

Shift-Fn1 is 

^[[[A  27 0033 0x1b
       91 0133 0x5b
       91 0133 0x5b
       65 0101 0x41

As you can see, using Guacamole Client the Shift key doesn't seem to be mapped through with Fn1.

Where/How are keys mapped through for the SSH protocol?

Is it possible to add Shift-Fn[1-24] key mappings?