Add websocket example that supports permessage-deflate extension

examples/websocket_mbedtls/util.h

@@ -0,0 +1,28 @@
+// util
+void hex_dump(const char *desc, const void *addr, const size_t len);
+
+#define Int32	signed long		
+#define Uint32	unsigned long	
+#define Byte	unsigned char	
+#define Word	unsigned short
+#define Bool	char
+#define true	1
+#define false	0
+
+#define MAKEWORD(a, b)      ((Word)(((Byte)((a) & 0xff)) | ((Word)((Byte)((b) & 0xff))) << 8))
+#define MAKELONG(low,high)	((Int32)(((Word)(low)) | (((Uint32)((Word)(high))) << 16)))
+#define LOWORD(l)           ((Word)((l) & 0xffff))
+#define HIWORD(l)           ((Word)((l) >> 16))
+#define LOBYTE(w)           ((Byte)((w) & 0xff))
+#define HIBYTE(w)           ((Byte)((w) >> 8))
+#define HH(x)				HIBYTE(HIWORD( x ))
+#define HL(x)				LOBYTE(HIWORD( x ))
+#define LH(x)				HIBYTE(LOWORD( x ))
+#define LL(x)				LOBYTE(LOWORD( x ))
+#define LONIBLE(x)			(((Byte)x) & 0x0F )
+#define HINIBLE(x)			((((Byte)x) * 0xF0)>>4)
+
+#define _SWAPS(x) 	((unsigned short)( \
+						((((unsigned short) x) & 0x000000FF) << 8) | \
+						((((unsigned short) x) & 0x0000FF00) >> 8)   \
+					))