libvnc[server|client]: implement xvp VNC extension.

This implements the xvp VNC extension, which is described in the
community version of the RFB protocol:
http://tigervnc.sourceforge.net/cgi-bin/rfbproto
It is also mentioned in the official RFB protocol.

1 files changed, 47 insertions, 1 deletions

diff --git a/rfb/rfbproto.h b/rfb/rfbproto.h
index c20f95c..cb62fc5 100644
--- a/rfb/rfbproto.h
+++ b/rfb/rfbproto.h
@@ -106,7 +106,7 @@ typedef uint32_t in_addr_t;
 #define                INADDR_NONE     ((in_addr_t) 0xffffffff)
 #endif
 
-#define MAX_ENCODINGS 20
+#define MAX_ENCODINGS 21
 
 /*****************************************************************************
  *
@@ -405,6 +405,8 @@ typedef struct {
 #define rfbKeyFrameRequest 12
 /* PalmVNC 1.4 & 2.0 SetScale Factor message */
 #define rfbPalmVNCSetScaleFactor 0xF
+/* Xvp message - bidirectional */
+#define rfbXvp 250
 
 
 
@@ -439,6 +441,9 @@ typedef struct {
 #define rfbEncodingSolMonoZip            0xFFFF0008
 #define rfbEncodingUltraZip              0xFFFF0009
 
+/* Xvp pseudo-encoding */
+#define rfbEncodingXvp 			 0xFFFFFECB
+
 /*
  * Special encoding numbers:
  *   0xFFFFFF00 .. 0xFFFFFF0F -- encoding-specific compression levels;
@@ -1061,6 +1066,44 @@ typedef struct _rfbTextChatMsg {
 #define rfbTextChatFinished 0xFFFFFFFD  
 
 
+/*-----------------------------------------------------------------------------
+ * Xvp Message
+ * Bidirectional message
+ * A server which supports the xvp extension declares this by sending a message
+ * with an Xvp_INIT xvp-message-code when it receives a request from the client
+ * to use the xvp Pseudo-encoding. The server must specify in this message the
+ * highest xvp-extension-version it supports: the client may assume that the
+ * server supports all versions from 1 up to this value. The client is then
+ * free to use any supported version. Currently, only version 1 is defined.
+ *
+ * A server which subsequently receives an xvp Client Message requesting an
+ * operation which it is unable to perform, informs the client of this by
+ * sending a message with an Xvp_FAIL xvp-message-code, and the same
+ * xvp-extension-version as included in the client's operation request.
+ *
+ * A client supporting the xvp extension sends this to request that the server
+ * initiate a clean shutdown, clean reboot or abrupt reset of the system whose
+ * framebuffer the client is displaying.
+ */
+
+
+typedef struct {
+    uint8_t type;			/* always rfbXvp */
+	uint8_t pad;
+	uint8_t version;	/* xvp extension version */
+	uint8_t code;      	/* xvp message code */
+} rfbXvpMsg;
+
+#define sz_rfbXvpMsg (4)
+
+/* server message codes */
+#define rfbXvp_Fail 0
+#define rfbXvp_Init 1
+/* client message codes */
+#define rfbXvp_Shutdown 2
+#define rfbXvp_Reboot 3
+#define rfbXvp_Reset 4
+
 
 /*-----------------------------------------------------------------------------
  * Modif sf@2002
@@ -1115,6 +1158,7 @@ typedef union {
 	rfbPalmVNCReSizeFrameBufferMsg prsfb; 
 	rfbFileTransferMsg ft;
 	rfbTextChatMsg tc;
+        rfbXvpMsg xvp;
 } rfbServerToClientMsg;
 
 
@@ -1350,6 +1394,7 @@ typedef struct _rfbSetSWMsg {
 #define sz_rfbSetSWMsg 6
 
 
+
 /*-----------------------------------------------------------------------------
  * Union of all client->server messages.
  */
@@ -1369,6 +1414,7 @@ typedef union {
 	rfbFileTransferMsg ft;
 	rfbSetSWMsg sw;
 	rfbTextChatMsg tc;
+        rfbXvpMsg xvp;
 } rfbClientToServerMsg;
 
 /*