[BusyBox] udhcp patches/ endianess

[Eric Lammerts]

On Mon, 31 Jan 2005, Rainer Weikusat wrote:
> Compile-time support for different endianesses.

> +choice
> +	prompt "Target byte order"

No need for a new config option...

#include <endian.h>
#if __BYTE_ORDER == __LITTLE_ENDIAN

But you shouldn't those defines anyway. Your stuff looks terribly
complicated, why not do something simple like this?

--- networking/udhcp/packet.c.orig	2005-02-01 09:04:03.000000000 -0500
+++ networking/udhcp/packet.c	2005-02-01 09:05:21.000000000 -0500
@@ -93,17 +93,14 @@

 	while (count > 1)  {
 		/*  This is the inner loop */
-		sum += *source++;
+		sum += ntohs(*source);
+		source++;
 		count -= 2;
 	}

 	/*  Add left-over byte, if any */
 	if (count > 0) {
-		/* Make sure that the left-over byte is added correctly both
-		 * with little and big endian hosts */
-		uint16_t tmp = 0;
-		*(uint8_t *) (&tmp) = * (uint8_t *) source;
-		sum += tmp;
+		sum += *(uint8_t *)source << 8;
 	}
 	/*  Fold 32-bit sum to 16 bits */
 	while (sum >> 16)