zebra: improve interface shutdown behaviour
Linux removes IPv6 addresses when the interface is set down. Those
addresses need to be readded when the interface is set up again.
Also, an interface should not be reactivated from shutdown by configuring
an ip address.
Finally, remove the three-state logic for the shutdown setting as its
sole current use may be mild confusion.
Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
diff --git a/zebra/interface.h b/zebra/interface.h
index 0777a2f..7a05348 100644
--- a/zebra/interface.h
+++ b/zebra/interface.h
@@ -34,9 +34,8 @@
#define IF_ZEBRA_MULTICAST_OFF 2
/* For interface shutdown configuration. */
-#define IF_ZEBRA_SHUTDOWN_UNSPEC 0
+#define IF_ZEBRA_SHUTDOWN_OFF 0
#define IF_ZEBRA_SHUTDOWN_ON 1
-#define IF_ZEBRA_SHUTDOWN_OFF 2
/* Router advertisement feature. */
#if (defined(LINUX_IPV6) && (defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1)) || defined(KAME)