static NMDHCPClient *
get_client_for_iface (NMDHCPManager *manager,
                      const char *iface,
                      gboolean ip6)
{
	NMDHCPManagerPrivate *priv;
	GHashTableIter iter;
	gpointer value;

	g_return_val_if_fail (manager != NULL, NULL);
	g_return_val_if_fail (NM_IS_DHCP_MANAGER (manager), NULL);
	g_return_val_if_fail (iface, NULL);

	priv = NM_DHCP_MANAGER_GET_PRIVATE (manager);

	g_hash_table_iter_init (&iter, priv->clients);
	while (g_hash_table_iter_next (&iter, NULL, &value)) {
		NMDHCPClient *candidate = NM_DHCP_CLIENT (value);

		if (   !strcmp (iface, nm_dhcp_client_get_iface (candidate))
		    && (nm_dhcp_client_get_ipv6 (candidate) == ip6))
			return candidate;
	}

	return NULL;
}
static NMDhcpClient *
get_client_for_ifindex (NMDhcpManager *manager, int ifindex, gboolean ip6)
{
	NMDhcpManagerPrivate *priv;
	GHashTableIter iter;
	gpointer value;

	g_return_val_if_fail (NM_IS_DHCP_MANAGER (manager), NULL);
	g_return_val_if_fail (ifindex > 0, NULL);

	priv = NM_DHCP_MANAGER_GET_PRIVATE (manager);

	g_hash_table_iter_init (&iter, priv->clients);
	while (g_hash_table_iter_next (&iter, NULL, &value)) {
		NMDhcpClient *candidate = NM_DHCP_CLIENT (value);

		if (   nm_dhcp_client_get_ifindex (candidate) == ifindex
		    && nm_dhcp_client_get_ipv6 (candidate) == ip6)
			return candidate;
	}

	return NULL;
}