+/* Assigns 'addr' as 'netdev''s IPv4 address and 'mask' as its netmask. If
+ * 'addr' is INADDR_ANY, 'netdev''s IPv4 address is cleared. Returns a
+ * positive errno value. */
+int
+netdev_set_in4(struct netdev *netdev, struct in_addr addr, struct in_addr mask)
+{
+ int error;
+
+ error = do_set_addr(netdev, af_inet_sock,
+ SIOCSIFADDR, "SIOCSIFADDR", addr);
+ if (!error && addr.s_addr != INADDR_ANY) {
+ error = do_set_addr(netdev, af_inet_sock,
+ SIOCSIFNETMASK, "SIOCSIFNETMASK", mask);
+ }
+ return error;
+}
+
+/* Adds 'router' as a default gateway for 'netdev''s IP address. */
+int
+netdev_add_router(struct netdev *netdev, struct in_addr router)
+{
+ struct in_addr any = { INADDR_ANY };
+ struct rtentry rt;
+ int error;
+
+ memset(&rt, 0, sizeof rt);
+ make_in4_sockaddr(&rt.rt_dst, any);
+ make_in4_sockaddr(&rt.rt_gateway, router);
+ make_in4_sockaddr(&rt.rt_genmask, any);
+ rt.rt_flags = RTF_UP | RTF_GATEWAY;
+ error = ioctl(af_inet_sock, SIOCADDRT, &rt) < 0 ? errno : 0;
+ if (error) {
+ VLOG_WARN("ioctl(SIOCADDRT): %s", strerror(error));
+ }
+ return error;
+}
+
+/* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address (if
+ * 'in6' is non-null) and returns true. Otherwise, returns false. */