Name
skb_copy_bits — 
     copy bits from skb to kernel buffer
 
Arguments
- skb
- 
     source skb
     
- offset
- 
     offset in source
     
- to
- 
     destination buffer
     
- len
- 
     number of bytes to copy
     
Description
   Copy the specified number of bytes from the source skb to the
   destination buffer.
   
   CAUTION ! :
   If its prototype is ever changed,
   check arch/{*}/net/{*}.S files,
   since it is called from BPF assembly code.