From 69a8259c5e438f949bd58b1a2f8e1d12a49f9216 Mon Sep 17 00:00:00 2001
From: Ondrej Zajicek <santiago@crfreenet.org>
Date: Sun, 1 Jan 2012 12:02:20 +0100
Subject: Allows sticky link-local neighbors.

Allows using NEF_STICKY neighbors with link-local addresses. This is
used for static route nexthops, they can be specified like fe80::1%eth0
.
---
 proto/static/config.Y |  6 ++++--
 proto/static/static.c | 14 ++++++--------
 proto/static/static.h |  1 +
 3 files changed, 11 insertions(+), 10 deletions(-)

(limited to 'proto/static')

diff --git a/proto/static/config.Y b/proto/static/config.Y
index 621fdf9b..f8e84f92 100644
--- a/proto/static/config.Y
+++ b/proto/static/config.Y
@@ -48,11 +48,12 @@ stat_route0: ROUTE prefix {
  ;
 
 stat_multipath1:
-   VIA ipa {
+   VIA ipa ipa_scope {
      last_srt_nh = this_srt_nh;
      this_srt_nh = cfg_allocz(sizeof(struct static_route));
      this_srt_nh->dest = RTD_NONE;
      this_srt_nh->via = $2;
+     this_srt_nh->via_if = $3;
      this_srt_nh->if_name = (void *) this_srt; /* really */
    }
  | stat_multipath1 WEIGHT expr {
@@ -67,9 +68,10 @@ stat_multipath:
  ;
 
 stat_route:
-   stat_route0 VIA ipa {
+   stat_route0 VIA ipa ipa_scope {
       this_srt->dest = RTD_ROUTER;
       this_srt->via = $3;
+      this_srt->via_if = $4;
    }
  | stat_route0 VIA TEXT {
       this_srt->dest = RTD_DEVICE;
diff --git a/proto/static/static.c b/proto/static/static.c
index e5b293c0..3323c7ee 100644
--- a/proto/static/static.c
+++ b/proto/static/static.c
@@ -138,12 +138,10 @@ static_decide(struct static_config *cf, struct static_route *r)
   /* r->dest != RTD_MULTIPATH, but may be RTD_NONE (part of multipath route)
      the route also have to be valid (r->neigh != NULL) */
 
-  struct iface *ifa = r->neigh->iface;
-
-  if (!ifa)
+  if (r->neigh->scope < 0)
     return 0;
 
-  if (cf->check_link && !(ifa->flags & IF_LINK_UP))
+  if (cf->check_link && !(r->neigh->iface->flags & IF_LINK_UP))
     return 0;
 
   return 1;
@@ -158,7 +156,7 @@ static_add(struct proto *p, struct static_config *cf, struct static_route *r)
     {
     case RTD_ROUTER:
       {
-	struct neighbor *n = neigh_find(p, &r->via, NEF_STICKY);
+	struct neighbor *n = neigh_find2(p, &r->via, r->via_if, NEF_STICKY);
 	if (n)
 	  {
 	    r->chain = n->data;
@@ -187,7 +185,7 @@ static_add(struct proto *p, struct static_config *cf, struct static_route *r)
 
 	for (r2 = r->mp_next; r2; r2 = r2->mp_next)
 	  {
-	    struct neighbor *n = neigh_find(p, &r2->via, NEF_STICKY);
+	    struct neighbor *n = neigh_find2(p, &r2->via, r2->via_if, NEF_STICKY);
 	    if (n)
 	      {
 		r2->chain = n->data;
@@ -385,7 +383,7 @@ static_same_dest(struct static_route *x, struct static_route *y)
   switch (x->dest)
     {
     case RTD_ROUTER:
-      return ipa_equal(x->via, y->via);
+      return ipa_equal(x->via, y->via) && (x->via_if == y->via_if);
 
     case RTD_DEVICE:
       return !strcmp(x->if_name, y->if_name);
@@ -394,7 +392,7 @@ static_same_dest(struct static_route *x, struct static_route *y)
       for (x = x->mp_next, y = y->mp_next;
 	   x && y;
 	   x = x->mp_next, y = y->mp_next)
-	if (!ipa_equal(x->via, y->via))
+	if (!ipa_equal(x->via, y->via) || (x->via_if != y->via_if))
 	  return 0;
       return !x && !y;
 
diff --git a/proto/static/static.h b/proto/static/static.h
index 775743cf..eb87ddec 100644
--- a/proto/static/static.h
+++ b/proto/static/static.h
@@ -27,6 +27,7 @@ struct static_route {
   int masklen;				/* Mask length */
   int dest;				/* Destination type (RTD_*) */
   ip_addr via;				/* Destination router */
+  struct iface *via_if;			/* Destination iface, for link-local vias */
   struct neighbor *neigh;
   byte *if_name;			/* Name for RTD_DEVICE routes */
   struct static_route *mp_next;		/* Nexthops for RTD_MULTIPATH routes */
-- 
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