ip_address_union_decode (&in->grp_address, in->af, &out->fp_grp_addr);
ip_address_union_decode (&in->src_address, in->af, &out->fp_src_addr);
ip_address_union_decode (&in->grp_address, in->af, &out->fp_grp_addr);
ip_address_union_decode (&in->src_address, in->af, &out->fp_src_addr);