Function ipsec_check_reqid

freebsd/net/if_ipsec.c:900–911

}

static int
ipsec_check_reqid(uint32_t reqid)
{
	struct ipsec_softc *sc;

	sx_assert(&ipsec_ioctl_sx, SA_XLOCKED);
	CK_LIST_FOREACH(sc, ipsec_idhash(reqid), idhash) {
		if (sc->reqid == reqid)
			return (EEXIST);
	}
	return (0);
}

/*
 * We use key_newreqid() to automatically obtain unique reqid.