Symbol: _pfil_head
sys/net/pfil.h
192
#define PFIL_HOOKED_IN(p) (((struct _pfil_head *)(p))->head_nhooksin > 0)
sys/net/pfil.h
193
#define PFIL_HOOKED_OUT(p) (((struct _pfil_head *)(p))->head_nhooksout > 0)