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Treat ExtendedClipboard messages with the Caps bit as Caps regardless of co-set action bits

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This commit is contained in:
Viktor Liu
2026-05-20 12:11:15 +02:00
parent b3f0f53a23
commit 2285db2b62
1 changed files with 7 additions and 2 deletions
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client/vnc/server/session_clipboard.go
+7 -2
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@@ -139,11 +139,16 @@ func (s *session) handleExtCutText(payloadLen uint32) error {
formats := flags & extClipFormatMask formats := flags & extClipFormatMask
rest := buf[4:] rest := buf[4:]
switch action { // A Caps message sets the Caps bit alongside one bit per action the
case extClipActionCaps: // peer supports, so the action byte is multi-bit. Detect it first; the
// remaining actions are single-bit and are dispatched after.
if action&extClipActionCaps != 0 {
// Client max sizes are informational for us today: we only emit // Client max sizes are informational for us today: we only emit
// text and already cap it at extClipMaxText. // text and already cap it at extClipMaxText.
return nil return nil
}
switch action {
case extClipActionRequest: case extClipActionRequest:
if formats&extClipFormatText != 0 { if formats&extClipFormatText != 0 {
return s.sendExtClipProvideText() return s.sendExtClipProvideText()