nc_header
struct nc_header *header;
header = (struct nc_header *) skb->data;
struct nc_header *header = NULL;
if (!((len + padlen + sizeof (struct nc_header)) & 0x01))
sizeof(struct nc_header) <= headroom)
if ((sizeof (struct nc_header) + padlen) <
+ sizeof (struct nc_header),
sizeof (struct nc_header),
unsigned extra = sizeof (struct nc_header)
#define FRAMED_SIZE(mtu) (sizeof (struct nc_header) \