Merge branch 'feature/KASM-2797_force_full_frame' into 'master'

Add /api/send_full_frame

Closes KASM-2797

See merge request kasm-technologies/internal/KasmVNC!50

unix/xserver/hw/vnc/XserverDesktop.cc

@@ -49,6 +49,8 @@
 
 extern "C" {
 void vncSetGlueContext(int screenIndex);
+
+extern int wakeuppipe[2];
 }
 
 using namespace rfb;
@@ -307,6 +309,15 @@ void XserverDesktop::handleSocketEvent(int fd, bool read, bool write)
 {
   try {
     if (read) {
+
+      if (fd == wakeuppipe[0]) {
+        unsigned char buf;
+        while (::read(fd, &buf, 1) > 0);
+
+        server->refreshClients();
+        return;
+      }
+
       if (handleListenerEvent(fd, &listeners, server))
         return;
     }

unix/xserver/hw/vnc/vncExtInit.cc

@@ -17,8 +17,10 @@
  * USA.
  */
 
+#include <fcntl.h>
 #include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 #include <errno.h>
 
 #include <set>
@@ -50,6 +52,8 @@
 
 extern "C" {
 void vncSetGlueContext(int screenIndex);
+
+int wakeuppipe[2];
 }
 
 using namespace rfb;
@@ -228,6 +232,11 @@ void vncExtensionInit(void)
           dummyY < 16)
           vncFatalError("Invalid value to %s", Server::maxVideoResolution.getName());
 
+      pipe(wakeuppipe);
+      const int flags = fcntl(wakeuppipe[0], F_GETFL, 0);
+      fcntl(wakeuppipe[0], F_SETFL, flags | O_NONBLOCK);
+      vncSetNotifyFd(wakeuppipe[0], 0, true, false);
+
       initialised = true;
     }