/* * SADB_X_SPDACQUIRE processing. * Acquire policy and SA(s) for a *OUTBOUND* packet. * send * <base, policy(*)> * to KMD, and expect to receive * <base> with SADB_X_SPDACQUIRE if error occurred, * or * <base, policy> * with SADB_X_SPDUPDATE from KMD by PF_KEY. * policy(*) is without policy requests. * * 0 : succeed * others: error number */