v8 *ikev2_decrypt_data (ikev2_sa_t * sa, u8 * data, int len);
int ikev2_encrypt_data (ikev2_sa_t * sa, v8 * src, u8 * dst);
void ikev2_generate_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t);
v8 *ikev2_decrypt_data (ikev2_sa_t * sa, u8 * data, int len);
int ikev2_encrypt_data (ikev2_sa_t * sa, v8 * src, u8 * dst);
void ikev2_generate_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t);