if (!in_addr_is_null(address->family, &address->in_addr_peer)) {
if (address->family == AF_INET)
r = sd_rtnl_message_append_in_addr(req, IFA_ADDRESS, &address->in_addr_peer.in);
else if (address->family == AF_INET6)
r = sd_rtnl_message_append_in6_addr(req, IFA_ADDRESS, &address->in_addr_peer.in6);
if (!in_addr_is_null(address->family, &address->in_addr_peer)) {
if (address->family == AF_INET)
r = sd_rtnl_message_append_in_addr(req, IFA_ADDRESS, &address->in_addr_peer.in);
else if (address->family == AF_INET6)
r = sd_rtnl_message_append_in6_addr(req, IFA_ADDRESS, &address->in_addr_peer.in6);