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The neercs client-server protocol

High level client-to-server commands:

• CONNECT: establish a connection with the server, with optional connection credentials
• ATTACH %d: attach to window with ID $1
• DETACH %d: detach from window with ID $1
• NEW %s: open a new process window, running either a new shell or the optional command line $1
• BROWSE: open a process browser window
• GRAB %d %d: grab process $2 and replace process browser window $1 with it
• KILL %d: kill window with ID $1
• DISCONNECT: close the connection with the server

Low level client-to-server commands:

• KEY %d ...: send one or several keystrokes for window with ID $1
• MOUSE %d ...: send a mouse event (motion, button press or release) for window with ID $1
• RESIZE %d ...: send a resize event for window with ID $1
• ACTIVE %d ...: set the active refresh area for window with ID $1

Legacy commands

The first neercs implementation used the following set of commands.

Client to server:

• ATTACH %d %d %d: attach client with a $1x$2 display and refresh delay $3
• QUIT: quit everything
• DELAY %d: update refresh delay
• RESIZE %d %d: change display size
• KEY %d: key $1 pressed
• MOUSEP %d %d %d: mouse button $3 pressed at $1,$2
• MOUSER %d %d %d: mouse button $3 released at $1,$2
• MOUSEM %d %d %d: mouse motion to $1,$2 with button $3 pressed

Server to client:

• TITLE %d %s: change display title for window $1 to "$2"
• CURSOR %d %d: set cursor visibility for window $1 to $2
• UPDATE %d %d %s: upload part of a window, caca canvas $3 starting at $1,$2
• REFRESH %d %d: refresh display, with cursor at $1,$2 (sent after all updates, when client should be consistent)
• DETACH