unsigned int csum_partial(const unsigned char * buff, int len,
unsigned int sum);
-/*
- * the same as csum_partial, but copies from src while it
- * checksums, and handles user-space pointer exceptions correctly, when needed.
- *
- * here even more important to align src and dst on a 32-bit (or even
- * better 64-bit) boundary
- */
-
-unsigned int csum_partial_copy_to(const unsigned char *src, unsigned char *dst,
- int len, int sum, int *err_ptr);
-unsigned int csum_partial_copy_from(const unsigned char *src, unsigned char *dst,
- int len, int sum, int *err_ptr);
-
/*
* Note: when you get a NULL pointer exception here this means someone
* passed in an incorrect kernel address to one of these functions.
return(csum_partial(dst, len, sum));
}
+/*
+ * the same as csum_partial, but copies from src while it
+ * checksums, and handles user-space pointer exceptions correctly, when needed.
+ *
+ * here even more important to align src and dst on a 32-bit (or even
+ * better 64-bit) boundary
+ */
+
static __inline__
unsigned int csum_partial_copy_from_user(const unsigned char *src, unsigned char *dst,
int len, int sum, int *err_ptr)
{
- return csum_partial_copy_from(src, dst, len, sum, err_ptr);
+ if(copy_from_user(dst, src, len)){
+ *err_ptr = -EFAULT;
+ return(-1);
+ }
+
+ return csum_partial(dst, len, sum);
}
/*
*/
#define csum_partial_copy_fromuser csum_partial_copy_from_user
-unsigned int csum_partial_copy(const unsigned char *src, unsigned char *dst, int len, int sum);
/*
* This is a version of ip_compute_csum() optimized for IP headers,
unsigned char *dst,
int len, int sum, int *err_ptr)
{
- if (access_ok(VERIFY_WRITE, dst, len))
- return(csum_partial_copy_to(src, dst, len, sum, err_ptr));
+ if (access_ok(VERIFY_WRITE, dst, len)){
+ if(copy_to_user(dst, src, len)){
+ *err_ptr = -EFAULT;
+ return(-1);
+ }
+
+ return csum_partial(src, len, sum);
+ }
if (len)
*err_ptr = -EFAULT;
-#include "asm/uaccess.h"
-#include "linux/errno.h"
-#include "linux/module.h"
-
-unsigned int arch_csum_partial(const unsigned char *buff, int len, int sum);
-
-unsigned int csum_partial(unsigned char *buff, int len, int sum)
-{
- return arch_csum_partial(buff, len, sum);
-}
-
-EXPORT_SYMBOL(csum_partial);
-
-unsigned int csum_partial_copy_to(const unsigned char *src,
- unsigned char __user *dst, int len, int sum,
- int *err_ptr)
-{
- if(copy_to_user(dst, src, len)){
- *err_ptr = -EFAULT;
- return(-1);
- }
-
- return(arch_csum_partial(src, len, sum));
-}
-
-unsigned int csum_partial_copy_from(const unsigned char __user *src,
- unsigned char *dst, int len, int sum,
- int *err_ptr)
-{
- if(copy_from_user(dst, src, len)){
- *err_ptr = -EFAULT;
- return(-1);
- }
-
- return arch_csum_partial(dst, len, sum);
-}