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--- Begin Message ---
Hi!
#+BEGIN_SRC C
len = blob_raw_len(attr);
if (len > attr_len || len < sizeof(struct blob_attr))
return 0;
data_len = blob_len(attr);
if (data_len > len)
return 0;
#+END_SRC
I can't understand the meaning of ~data_len > len~!
#+BEGIN_SRC C
/*
* blob_len: returns the length of the attribute's payload
*/
static inline size_t
blob_len(const struct blob_attr *attr)
{
return (be32_to_cpu(attr->id_len) & BLOB_ATTR_LEN_MASK) - sizeof(struct
blob_attr);
}
/*
* blob_raw_len: returns the complete length of an attribute (including the
header)
*/
static inline size_t
blob_raw_len(const struct blob_attr *attr)
{
return blob_len(attr) + sizeof(struct blob_attr);
}
/*
* blob_pad_len: returns the padded length of an attribute (including the
header)
*/
static inline size_t
blob_pad_len(const struct blob_attr *attr)
{
unsigned int len = blob_raw_len(attr);
len = (len + BLOB_ATTR_ALIGN - 1) & ~(BLOB_ATTR_ALIGN - 1);
return len;
}
#+END_SRC
By definition, ~blob_raw_len~ will be greater than ~blob_len~.
--
Best regards,
Kevin Vigouroux
--- End Message ---
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