#define CLIP_VCC(vcc) ((struct clip_vcc *) ((vcc)->user_back))
#define NEIGH2ENTRY(neigh) ((struct atmarp_entry *) (neigh)->primary_key)
#define CLIP_VCC(vcc) ((struct clip_vcc *) ((vcc)->user_back))
#define NEIGH2ENTRY(neigh) ((struct atmarp_entry *) (neigh)->primary_key)