include/lwip/sockets: adjust to Phoenix-RTOS ioctl interface

src/include/lwip/sockets.h

@@ -400,16 +400,16 @@ typedef struct ipv6_mreq {
  * and the size of any in or out parameters in the upper
  * word.  The high 2 bits of the upper word are used
  * to encode the in/out status of the parameter; for now
- * we restrict parameters to at most 128 bytes.
+ * we restrict parameters to at most 16383 bytes.
  */
 #if !defined(FIONREAD) || !defined(FIONBIO)
-#define IOCPARM_MASK    0x7fU           /* parameters must be < 128 bytes */
-#define IOC_VOID        0x20000000UL    /* no parameters */
+#define IOCPARM_MASK    0x1fffU         /* parameters must be < 8192 bytes */
+#define IOC_VOID        0x00000000UL    /* no parameters */
+#define IOC_NESTED      0x20000000UL    /* inside structure is nested and has to be treated specially */
 #define IOC_OUT         0x40000000UL    /* copy out parameters */
 #define IOC_IN          0x80000000UL    /* copy in parameters */
 #define IOC_INOUT       (IOC_IN|IOC_OUT)
-                                        /* 0x20000000 distinguishes new &
-                                           old ioctl's */
+
 #define _IO(x,y)        ((long)(IOC_VOID|((x)<<8)|(y)))
 
 #define _IOR(x,y,t)     ((long)(IOC_OUT|((sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y)))