pfkey_send_x3
if ((len = pfkey_send_x3(so, SADB_X_SPDFLUSH, SADB_SATYPE_UNSPEC)) < 0)
if ((len = pfkey_send_x3(so, SADB_X_SPDDUMP, SADB_SATYPE_UNSPEC)) < 0)
static int pfkey_send_x3(int, u_int, u_int);
if ((len = pfkey_send_x3(so, SADB_REGISTER, satype)) < 0)
if ((len = pfkey_send_x3(so, SADB_FLUSH, satype)) < 0)
if ((len = pfkey_send_x3(so, SADB_DUMP, satype)) < 0)
if ((len = pfkey_send_x3(so, SADB_X_PROMISC, (flag ? 1 : 0))) < 0)