362 lines
12 KiB
Plaintext
362 lines
12 KiB
Plaintext
server client
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------ ------
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[accept] <-- connect
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challenge --> [encrypt]
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[verify] <-- response (encrypted challenge, client name)
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hangup if invalid
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query info -->
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<-- info (size)
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---
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use automake
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order includes according to source directory
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fix function definitions
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return type on first line
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function name in 1st column on 2nd line
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parameters at 1st tab stop starting 3rd line, one per line
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fix parameter indentation
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in header file: 7th tab stop (not 8th)
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in source file: 1st tab stop (not 8th)
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---
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HTTP stuff
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no way to save config using HTTP
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should have a button or a page to force save of config
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or just save config every time it's changed
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should use authentication (at least basic)
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provide way to kill/restart server via HTTP
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provide way to query why locked to screen?
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handy for debugging at least
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---
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CThreadRep::threadSignalHandler not shutdown on assert
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thread stays around and holds our resources (like sockets)
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should ensure that it terminates correctly
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---
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win32:
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provide taskbar icon
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win32 dll:
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should make this as small as possible
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don't use standard libraries
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use custom _DllMainCRTStartup(); just call DllMain() from it.
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use /MERGE linker switch to merge sections
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clean up c:\winnt\synergy.sgc
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desktop switcher program failure when running synergy as service
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returns access denied from CreateDesktop()
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don't know why
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client will need to be able to retry connecting to server
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in case server isn't ready yet, client can camp
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---
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bug with half-duplex keys
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win32 server sent num-lock to grace
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grace converts to half-duplex so only synthesizes key down
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now grace starts server and is locked to screen
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grace should ignore half duplex keys when seeing if locked to screen
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---
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must send up key events when leaving screen for keys still down
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some key combos get eaten and the key ups aren't sent
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e.g. ctrl+alt+del on win2k to grace
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mouse is forced back to to win2k
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ctrl and alt up not sent to grace
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grace thinks ctrl and alt are down 'til user physically press/releases them
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---
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CClient and CServer:
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not checking in stop() that we're actually running
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must mutex m_primary/m_screen
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they could be NULL if in the middle of shutting down
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---
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win32 screen saver
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win95 etc:
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keybd_event can terminate screen saver but not mouse_event
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keybd_event resets screen saver start timer but not mouse_event
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to kill screen saver (if it's known to be running):
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PostMessage (GetActiveWindow(), WM_CLOSE, 0, 0L);
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to find if screen saver is running:
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FindWindow ("WindowsScreenSaverClass", NULL);
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win nt 4:
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mouse_event resets screen saver start timer but not keybd_event
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neither can stop screen saver because it runs in a separate desktop
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to kill screen saver:
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BOOL CALLBACK KillScreenSaverFunc(HWND hwnd, LPARAM lParam)
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{
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if(IsWindowVisible(hwnd))
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PostMessage(hwnd, WM_CLOSE, 0, 0);
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return TRUE;
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}
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HDESK hdesk;
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hdesk = OpenDesktop(TEXT("Screen-saver"),
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0,
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FALSE,
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DESKTOP_READOBJECTS | DESKTOP_WRITEOBJECTS);
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if (hdesk)
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{
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EnumDesktopWindows(hdesk, KillScreenSaverFunc, 0);
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CloseDesktop(hdesk);
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}
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---
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unix:
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restarting fails to connect until a user logs in:
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Xlib: no protocol specified
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this is caused by login manager
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all clients are rejected, except those started by manager itself
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workaround is to have synergy started by login manager
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should then use --no-restart, though that's not necessary
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affects client and server
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cannot switch screens on login screen:
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xdm,kdm grab keyboard for duration of login screen
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synergy cannot switch unless it can grab keyboard
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gdm doesn't appear to grab keyboard or mouse for duration
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affects server, only
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check if DISPLAY env var is unset. use ":0.0" as default.
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---
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bug in updating screens
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saw a goofy set of screens after update
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i think the config was similar to:
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A B
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C
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D E
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---
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not handling international characters
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---
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not handling screen saver at all yet
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---
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not distinguishing between caps lock and shift lock
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In Caps Lock mode, the alphabetic keys send their uppercase (shifted) char-
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acter when pressed alone. For Caps Lock mode, pressing and releasing the
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lock key turns on the mode and pressing and releasing the lock key again
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turns off the mode. In Shift Lock mode, all keys on the main keypad send
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their shifted character when pressed alone. For Shift Lock mode, pressing
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and releasing the Lock key turns on the mode, and pressing and releasing
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either the Lock or the Shift key turns off the mode.
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---
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currently sending all clipboards to all clients
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some clients may not need all clipboards
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add filtering mechanism
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---
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sometimes not sending correct clipboard
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some kind of race condition i think
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can select text then switch and get empty clipboard
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switching back to owner screen then out gets correct clipboard
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dunno if this is still a problem
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---
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win32 not sending correct clipboard
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got 43 bytes sent for a 3 byte selection
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remaining bytes were 0
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problem persisted; also got 43 bytes for a 2 byte selection
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---
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need timeout on CXWindowsClipboard::CReply objects
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should flush replies that are too old
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assumption is that requestor is broken
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---
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inconsistencies
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exceptions
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using getWhat() in some places to return a code, elsewhere returns message
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references/pointers
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should use pointers for any in/out parameter
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but using references in some places
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---
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win32 hook DLL sometimes not unloaded when server is killed?
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will get assertion on restart as if DLL was still loaded.
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can tell because all DLL copies share data segment.
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should prevent multiple copies from loading (or initializing)
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replace asserts with (multithread locked) check of variables
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return 0 if busy
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server must handle failure
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try to figure out why it's not unloading
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---
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test:
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X primary
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ctrl+alt+keypad_add, ctrl+alt_keypad_minus -> eaten by primary X server
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ctrl+alt+backspace probably eaten by primary X server if so configured
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ctrl+alt+delete probably eaten locally
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probably underneath primary X server too
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Win32 desktop -> X laptop
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eaten global hot keys:
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ctrl+alt+delete -> task manager (or logon or reboot)
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alt+[shift+]tab -> cycle through tasks
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alt+[shift+]esc -> cycle windows
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ctrl+esc -> start menu
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windows+R -> run dialog
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windows+M -> minimize all
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windows+shift+M -> undo minimize all
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windows+F1 -> help
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windows+E -> explorer
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windows+F -> find files
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windows+ctrl+F -> find computer
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windows+tab -> cycle through taskbar buttons
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windows+break -> system properties
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not eaten:
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alt+space -> system menu
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shift+F10 -> context menu
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app key -> context menu
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misc:
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accessibility shortcuts: not eaten but dialogs appear anyway
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X laptop -> Win32 desktop
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check:
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shift+tab -> okay
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alt+[shift+]tab -> okay
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alt+[shift+]esc -> okay
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ctrl+esc -> start menu -> okay
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ctrl+esc, esc, shift+F10 -> toolbar context menu -> okay
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F10 -> activate menu in explorer -> okay
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shift+F10 -> context menu -> okay
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alt+space -> context menu -> okay
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alt+hyphen -> MDI window menu -> okay
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alt+letter -> open corresponding menu -> okay
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alt+F6 -> switch between windows in single program -> okay
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shift+insert CD-ROM -> bypass auto-run
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check accessibility shortcuts -> does not work
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check accessibility features
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sticky keys -> no
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filter keys -> no
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toggle keys -> no
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mouse keys -> no
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high contrast -> no
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X desktop -> win32
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check:
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shift+tab
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windows+R -> run dialog
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windows+M -> minimize all
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windows+shift+M -> minimize all
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windows+F1 -> help
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windows+E -> explorer
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windows+F -> find files
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windows+ctrl+F -> find computer
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windows+tab -> cycle through taskbar buttons
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windows+break -> system properties
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app key -> context menu
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Win32 -> Win32
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alt+F6 -> eaten (isabel to audrey, but not audrey to isabel)
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check accessibility shortcuts work on secondary
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check accessibility features work on secondary
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---
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avoid fullscreen transparent window on win32
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using CBT hook to discard activation/focus messages
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but it's not being called when we lose keyboard input
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also, we sometimes don't get the keyboard input to start with
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---
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keyboard hook problems (win32)
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now passing keyboard events through in most cases
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this fixes problem on isabel where toggle lights don't toggle
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and num-lock behaved incorrectly (generated wrong keys).
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seems the DefWindowProc() needed to process the keys
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unfortunately, keys sometimes leak into wrong app. seems related
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to times when we don't get the keyboard input. key events are
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not delivered to app on primary until cursor returns to primary.
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no idea how that's possible.
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current have some code to check active window and reset it in
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keyboard hook. that code doesn't work.
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seem to be having problems with windows key now, too. looks like
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a down is sent but not the corresponding up so secondary system
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thinks the key is always down.
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---
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try to determine keyboard quirks automatically
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in particular, set the half-duplex flags
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maybe KBD extension will help determine this
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---
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key events sent to console on win me (95/98?) are very slow
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1/4 to 1/2 second delay before key up is processed
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key up log message is also delayed
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console causing a system-wide delay?
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---
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adjust thread priorities on win32
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maybe remove changes altogether
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currently isabel starts single-stepping mouse when dragging window
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sometimes it goes normal speed but it's mostly very slow
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even a very high priority doesn't seem to help
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haven't tried real-time priority
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a very high priority on client fixes delay when typeing into console
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is it the output console causing the slowness?
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---
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Accessibility Shortcuts
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Key Result
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-------------------------------------------------------------------
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Tap SHIFT 5 times Toggles StickyKeys on and off.
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Press down and hold the right Toggles FilterKeys on and off.
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SHIFT key for 8 seconds
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Press down and hold the NUM LOCK Toggles ToggleKeys on and off.
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key for 5 seconds
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Left ALT+left SHIFT+NUM LOCK Toggles MouseKeys on and off.
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Left ALT+left SHIFT+PRINT SCREEN Toggles High Contrast on and off.
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---
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disable ctrl+alt+del info:
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SystemParametersInfo(SPI_SETSCREENSAVERRUNNING, TRUE, &dummy, 0)
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fools system into thinking screen saver is running
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that disables ctrl+alt+del, alt+tab, ctrl+esc
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dunno if keystrokes are queued
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may be limited to win 95/98/me
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win nt sp 3 and above:
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low-level keyboard hook is called before ctrl+esc, alt+tab, alt+esc
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use that to capture and disable
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seems that low-level hook is notified of ctrl+alt+del but can't stop it
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win nt sp 2 and below
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ctrl+esc can be disabled by replacing task manager (dunno how)
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RegisterHotKey() can be used to catch alt+tab and alt+esc
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only while app is running, of course
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win nt
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keyboard filter driver can capture keys (see win NT DDK)
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http://216.239.51.100/search?q=cache:q-f03UHhFMMC:www.thescarms.com/VBasic/StopReBoot.asp+alt%2Btab+disable&hl=en
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some info on changing keyboard scan code mapping
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can be used to disable keys but looks like reboot is required
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---
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Q179905
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suggestion for bypassing hook code when called by debugger.
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may prevent system from getting locked up when debugging.
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---
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how is CTCPSocket::connect() able to cancel?
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looks like it can't
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make it asynchronous and use poll() to wait for connection
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use testCancel() to make it cancellable
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---
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win32 rel notes:
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HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Windows\NoInteractiveServices
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can prevent an interactive service from running interactively.
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how can we tell if we're not running interactively?
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even if not interactive we can use MessageBox() to alert user
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use MB_SERVICE_NOTIFICATION flag
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must use a separate thread in initialization if called from handler
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must close dialog if CTRL_LOGOFF_EVENT is received
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see SetConsoleCtrlHandler() and CLog (which uses it)
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maybe possible to get around NoInteractiveServices
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modify DACLs on windows station/desktops to impersonate logged on user
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see "Interacting with the User by a Win32 Service"
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