+struct secasindex;
+struct secashead;
+struct sadb_key;
+struct sadb_lifetime;
+
+extern struct secpolicy *key_allocsp(struct secpolicyindex *, u_int);
+extern struct secasvar *key_allocsa_policy(struct secasindex *);
+extern struct secpolicy *key_gettunnel(struct sockaddr *,
+ struct sockaddr *, struct sockaddr *, struct sockaddr *);
+extern struct secasvar *key_alloc_outbound_sav_for_interface(ifnet_t interface, int family,
+ struct sockaddr *src,
+ struct sockaddr *dst);
+extern int key_checkrequest(struct ipsecrequest *isr, struct secasindex *,
+ struct secasvar **sav);
+extern struct secasvar *key_allocsa(u_int, caddr_t, caddr_t,
+ u_int, u_int32_t);
+struct secasvar *
+key_allocsa_extended(u_int family, caddr_t src, caddr_t dst,
+ u_int proto, u_int32_t spi, ifnet_t interface);
+extern bool key_checksa_present(u_int family, caddr_t src, caddr_t dst, u_int16_t src_port, u_int16_t dst_port);
+extern u_int16_t key_natt_get_translated_port(struct secasvar *);
+extern void key_freesp(struct secpolicy *, int);
+extern void key_freesav(struct secasvar *, int);
+extern struct secpolicy *key_newsp(void);
+extern struct secpolicy *key_msg2sp(struct sadb_x_policy *, size_t, int *);
+extern struct mbuf *key_sp2msg(struct secpolicy *);
+extern int key_ismyaddr(struct sockaddr *);
+extern int key_spdacquire(struct secpolicy *);
+extern void key_timehandler(void);
+extern u_int32_t key_random(void);
+extern void key_randomfill(void *, size_t);
+extern void key_freereg(struct socket *);
+extern int key_parse(struct mbuf *, struct socket *);
+extern int key_checktunnelsanity(struct secasvar *, u_int, caddr_t, caddr_t);
+extern void key_sa_recordxfer(struct secasvar *, struct mbuf *);
+extern void key_sa_routechange(struct sockaddr *);
+extern void key_sa_chgstate(struct secasvar *, u_int8_t);
+extern void key_sa_stir_iv(struct secasvar *);
+extern void key_delsah(struct secashead *sah);
+extern struct secashead *key_newsah2(struct secasindex *saidx, u_int8_t dir);
+extern void key_delsav(struct secasvar *sav);
+extern struct secpolicy *key_getspbyid(u_int32_t);
+extern void key_delsp_for_ipsec_if(ifnet_t ipsec_if);
+
+struct ifnet;
+struct ifnet_keepalive_offload_frame;
+extern u_int32_t key_fill_offload_frames_for_savs(struct ifnet *,
+ struct ifnet_keepalive_offload_frame *frames_array, u_int32_t, size_t);