zebra: maintain the router-id per VRF

A router may need different identifier among the VRFs. So move the
maintenance of router-id per VRF.

* rib.h:

  Move the previous global variables in router-id.c into the
  "struct zebra_vrf":
  - struct list _rid_all_sorted_list/*rid_all_sorted_list
  - struct list _rid_lo_sorted_list/*rid_lo_sorted_list
  - struct prefix rid_user_assigned

* router-id.c/router-id.h:

  A new parameter "vrf_id" is added to all the router-id APIs.
  Their operations are done only within the specified VRF.

  A new command "router-id A.B.C.D vrf N" is added to allow
  manual router-id for any VRF.

  The old router_id_init() function is splitted into two:
  - router_id_cmd_init(): it only installs the commands
  - router_id_init(): this new one initializes the variables for
                      a specified VRF

* zebra_rib.c: Add new functions zebra_vrf_get/lookup() called
               from router-id.c.

* main.c: Replace router_id_init() with router_id_cmd_init() and
          call the new router_id_init() in zebra_vrf_new().

Signed-off-by: Feng Lu <lu.feng@6wind.com>
Reviewed-by: Alain Ritoux <alain.ritoux@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Vincent JARDIN <vincent.jardin@6wind.com>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

Conflicts:
	zebra/rib.h

Conflicts:
	zebra/rib.h
	zebra/router-id.c
	zebra/zserv.h

1 files changed, 2 insertions, 1 deletions

diff --git a/zebra/main.c b/zebra/main.c
index 92a0c0b31b..95a0e438e8 100644
--- a/zebra/main.c
+++ b/zebra/main.c
@@ -224,6 +224,7 @@ zebra_vrf_new (vrf_id_t vrf_id, void **info)
     {
       zvrf = zebra_vrf_alloc (vrf_id);
       *info = (void *)zvrf;
+      router_id_init (zvrf);
     }
 
   return 0;
@@ -360,7 +361,7 @@ main (int argc, char **argv)
   rib_init ();
   zebra_if_init ();
   zebra_debug_init ();
-  router_id_init();
+  router_id_cmd_init ();
   zebra_vty_init ();
   access_list_init ();
   prefix_list_init ();