Function carp_multicast_cleanup

freebsd/netinet/ip_carp.c:1476–1515

* Free multicast structures. */

 * Free multicast structures.
 */
static void
carp_multicast_cleanup(struct carp_if *cif, sa_family_t sa)
{
#ifdef INET
	struct ip_moptions *imo = &cif->cif_imo;
	struct in_mfilter *imf;
#endif
#ifdef INET6
	struct ip6_moptions *im6o = &cif->cif_im6o;
	struct in6_mfilter *im6f;
#endif
	sx_assert(&carp_sx, SA_XLOCKED);

	switch (sa) {
#ifdef INET
	case AF_INET:
		if (cif->cif_naddrs != 0)
			break;

		while ((imf = ip_mfilter_first(&imo->imo_head)) != NULL) {
			ip_mfilter_remove(&imo->imo_head, imf);
			in_leavegroup(imf->imf_inm, NULL);
			ip_mfilter_free(imf);
		}
		break;
#endif
#ifdef INET6
	case AF_INET6:
		if (cif->cif_naddrs6 != 0)
			break;

		while ((im6f = ip6_mfilter_first(&im6o->im6o_head)) != NULL) {
			ip6_mfilter_remove(&im6o->im6o_head, im6f);
			in6_leavegroup(im6f->im6f_in6m, NULL);
			ip6_mfilter_free(im6f);
		}
		break;
#endif
	}
}

int
carp_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *sa)