unsigned int sal_get_keepalive_period(Sal *ctx);
void sal_use_session_timers(Sal *ctx, int expires);
void sal_use_double_registrations(Sal *ctx, bool_t enabled);
+void sal_expire_old_registration_contacts(Sal *ctx, bool_t enabled);
void sal_reuse_authorization(Sal *ctx, bool_t enabled);
void sal_use_one_matching_codec_policy(Sal *ctx, bool_t one_matching_codec);
void sal_use_rport(Sal *ctx, bool_t use_rports);