alloc_skb -- allocate a network buffer
struct sk_buff * alloc_skb
(unsigned int size, int gfp_mask);
size to allocate
Allocate a new &sk_buff. The returned buffer has no headroom and a
tail room of size bytes. The object has a reference count of one.
The return is the buffer. On a failure the return is NULL.
Buffers may only be allocated from interrupts using a gfp_mask of