Support sending TextChat messages back to the client

libvncserver/rfbserver.c

@@ -1015,6 +1015,47 @@ rfbSendServerIdentity(rfbClientPtr cl)
     return TRUE;
 }
 
+rfbBool rfbSendTextChatMessage(rfbClientPtr cl, uint32_t length, char *buffer)
+{
+    rfbTextChatMsg tc;
+    int bytesToSend=0;
+
+    memset((char *)&tc, 0, sizeof(tc)); 
+    tc.type = rfbTextChat;
+    tc.length = Swap32IfLE(length);
+    
+    switch(length) {
+    case rfbTextChatOpen:
+    case rfbTextChatClose:
+    case rfbTextChatFinished:
+        bytesToSend=0;
+        break;
+    default:
+        bytesToSend=length;
+        if (bytesToSend>rfbTextMaxSize)
+            bytesToSend=rfbTextMaxSize;
+    }
+
+    if (cl->ublen + sz_rfbTextChatMsg + bytesToSend > UPDATE_BUF_SIZE) {
+        if (!rfbSendUpdateBuf(cl))
+            return FALSE;
+    }
+    
+    memcpy(&cl->updateBuf[cl->ublen], (char *)&tc, sz_rfbTextChatMsg);
+    cl->ublen += sz_rfbTextChatMsg;
+    if (bytesToSend>0) {
+        memcpy(&cl->updateBuf[cl->ublen], buffer, bytesToSend);
+        cl->ublen += bytesToSend;    
+    }
+    rfbStatRecordMessageSent(cl, rfbTextChat, sz_rfbTextChatMsg+bytesToSend, sz_rfbTextChatMsg+bytesToSend);
+
+    if (!rfbSendUpdateBuf(cl))
+        return FALSE;
+        
+    return TRUE;
+}
+
+
 rfbBool rfbSendFileTransferMessage(rfbClientPtr cl, uint8_t contentType, uint8_t contentParam, uint32_t size, uint32_t length, char *buffer)
 {
     rfbFileTransferMsg ft;

rfb/rfb.h

@@ -959,6 +959,8 @@ extern int rfbStatGetEncodingCountRcvd(rfbClientPtr cl, uint32_t type);
 /* Set which version you want to advertise 3.3, 3.6, 3.7 and 3.8 are currently supported*/
 extern void rfbSetProtocolVersion(rfbScreenInfoPtr rfbScreen, int major_, int minor_);
 
+/* send a TextChat message to a client */
+extern rfbBool rfbSendTextChatMessage(rfbClientPtr cl, uint32_t length, char *buffer);