From 93fd4bc18a81a568f3329ee2aa22390ef75b05ed Mon Sep 17 00:00:00 2001
From: plettix <plettix@gmail.com>
Date: Tue, 7 Jul 2015 10:32:16 +0200
Subject: [PATCH 2/3] fix for issue 81 use different buffers for decode and
 encode

---
 libvncserver/websockets.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/libvncserver/websockets.c b/libvncserver/websockets.c
index 937f6d4d..3c8e99aa 100644
--- a/libvncserver/websockets.c
+++ b/libvncserver/websockets.c
@@ -481,15 +481,15 @@ webSocketsEncodeHixie(rfbClientPtr cl, const char *src, int len, char **dst)
     int sz = 0;
     ws_ctx_t *wsctx = (ws_ctx_t *)cl->wsctx;
 
-    wsctx->codeBuf[sz++] = '\x00';
-    len = __b64_ntop((unsigned char *)src, len, wsctx->codeBuf+sz, sizeof(wsctx->codeBuf) - (sz + 1));
+    wsctx->codeBufEncode[sz++] = '\x00';
+    len = __b64_ntop((unsigned char *)src, len, wsctx->codeBufEncode+sz, sizeof(wsctx->codeBufEncode) - (sz + 1));
     if (len < 0) {
         return len;
     }
     sz += len;
 
-    wsctx->codeBuf[sz++] = '\xff';
-    *dst = wsctx->codeBuf;
+    wsctx->codeBufEncode[sz++] = '\xff';
+    *dst = wsctx->codeBufEncode;
     return sz;
 }
 
@@ -527,7 +527,7 @@ webSocketsDecodeHixie(rfbClientPtr cl, char *dst, int len)
     char *buf, *end = NULL;
     ws_ctx_t *wsctx = (ws_ctx_t *)cl->wsctx;
 
-    buf = wsctx->codeBuf;
+    buf = wsctx->codeBufDecode;
 
     n = ws_peek(cl, buf, len*2+2);
 
@@ -781,7 +781,7 @@ webSocketsEncodeHybi(rfbClientPtr cl, const char *src, int len, char **dst)
 	  return 0;
     }
 
-    header = (ws_header_t *)wsctx->codeBuf;
+    header = (ws_header_t *)wsctx->codeBufEncode;
 
     if (wsctx->base64) {
 	opcode = WS_OPCODE_TEXT_FRAME;
@@ -806,7 +806,7 @@ webSocketsEncodeHybi(rfbClientPtr cl, const char *src, int len, char **dst)
     }
 
     if (wsctx->base64) {
-        if (-1 == (ret = __b64_ntop((unsigned char *)src, len, wsctx->codeBuf + sz, sizeof(wsctx->codeBuf) - sz))) {
+        if (-1 == (ret = __b64_ntop((unsigned char *)src, len, wsctx->codeBufEncode + sz, sizeof(wsctx->codeBufEncode) - sz))) {
 	  rfbErr("%s: Base 64 encode failed\n", __func__);
 	} else {
 	  if (ret != blen)
@@ -814,11 +814,12 @@ webSocketsEncodeHybi(rfbClientPtr cl, const char *src, int len, char **dst)
 	  ret += sz;
 	}
     } else {
-      memcpy(wsctx->codeBuf + sz, src, len);
+      memcpy(wsctx->codeBufEncode + sz, src, len);
       ret =  sz + len;
     }
 
-    *dst = wsctx->codeBuf;
+    *dst = wsctx->codeBufEncode;
+
     return ret;
 }
 
-- 
2.26.2