I rewrote the interface handling code, so that it supports multiple

addresses per interface (needed for example for IPv6 support).

Visible changes:

o  struct iface now contains a list of all interface addresses (represented
   by struct ifa), iface->addr points to the primary address (if any).
o  Interface has IF_UP set iff it's up and it has a primary address.
o  IF_UP is now independent on IF_IGNORED (i.e., you need to test IF_IGNORED
   in the protocols; I've added this, but please check).
o  The if_notify_change hook has been simplified (only one interface pointer
   etc.).
o  Introduced a ifa_notify_change hook. (For now, only the Direct protocol
   does use it -- it's wise to just listen to device routes in all other
   protocols.)
o  Removed IF_CHANGE_FLAGS notifier flag (it was meaningless anyway).
o  Updated all the code except netlink (I'll look at it tomorrow) to match
   the new semantics (please look at your code to ensure I did it right).

Things to fix:

o  Netlink.
o  Make krt-iface interpret "eth0:1"-type aliases as secondary addresses.

1 files changed, 4 insertions, 1 deletions

diff --git a/nest/protocol.h b/nest/protocol.h
index c203f252..5e1e2ce9 100644
--- a/nest/protocol.h
+++ b/nest/protocol.h
@@ -13,6 +13,7 @@
 #include "lib/resource.h"
 
 struct iface;
+struct ifa;
 struct rte;
 struct neighbor;
 struct rta;
@@ -96,6 +97,7 @@ struct proto {
    *	General protocol hooks:
    *
    *	   if_notify	Notify protocol about interface state changes.
+   *	   ifa_notify	Notify protocol about interface address changes.
    *	   rt_notify	Notify protocol about routing table updates.
    *	   neigh_notify	Notify protocol about neighbor cache events.
    *	   make_tmp_attrs  Construct ea_list from private attrs stored in rte.
@@ -106,7 +108,8 @@ struct proto {
    *			0=process it through the import filter set by the user.
    */
 
-  void (*if_notify)(struct proto *, unsigned flags, struct iface *new, struct iface *old);
+  void (*if_notify)(struct proto *, unsigned flags, struct iface *i);
+  void (*ifa_notify)(struct proto *, unsigned flags, struct ifa *a);
   void (*rt_notify)(struct proto *, struct network *net, struct rte *new, struct rte *old);
   void (*neigh_notify)(struct neighbor *neigh);
   struct ea_list *(*make_tmp_attrs)(struct rte *rt, struct linpool *pool);