prepare_rule
if (prepare_rule(id, src, dst, d_port) == -1)
int prepare_rule(u_int32_t, struct sockaddr *, struct sockaddr *,
if (prepare_rule(id, src, dst, d_port) == -1)
int prepare_rule(u_int32_t, struct sockaddr *, struct sockaddr *,
if (prepare_rule(id, src, dst, d_port, proto) == -1)
if (prepare_rule(id, src, dst, d_port, proto) == -1)