Adds krt_metric linux route attribute.

3 files changed, 28 insertions, 7 deletions

diff --git a/sysdep/unix/krt.Y b/sysdep/unix/krt.Y
index 2c45c5fe..c0141f57 100644
--- a/sysdep/unix/krt.Y
+++ b/sysdep/unix/krt.Y
@@ -17,7 +17,7 @@ CF_DEFINES
 
 CF_DECLS
 
-CF_KEYWORDS(KERNEL, PERSIST, SCAN, TIME, LEARN, DEVICE, ROUTES, KRT_SOURCE)
+CF_KEYWORDS(KERNEL, PERSIST, SCAN, TIME, LEARN, DEVICE, ROUTES, KRT_SOURCE, KRT_METRIC)
 
 CF_GRAMMAR
 
@@ -90,7 +90,8 @@ kif_item:
    }
  ;
 
-CF_ADDTO(dynamic_attr, KRT_SOURCE { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_SOURCE); })
+CF_ADDTO(dynamic_attr, KRT_SOURCE { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_KRT_SOURCE); })
+CF_ADDTO(dynamic_attr, KRT_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_KRT_METRIC); })
 
 CF_CODE
 
diff --git a/sysdep/unix/krt.c b/sysdep/unix/krt.c
index de1188a1..f4bfca78 100644
--- a/sysdep/unix/krt.c
+++ b/sysdep/unix/krt.c
@@ -907,22 +907,36 @@ krt_shutdown(struct proto *P)
   return PS_DOWN;
 }
 
-struct ea_list *
+static struct ea_list *
 krt_make_tmp_attrs(struct rte *rt, struct linpool *pool)
 {
-  struct ea_list *l = lp_alloc(pool, sizeof(struct ea_list) + 1 * sizeof(eattr));
+  struct ea_list *l = lp_alloc(pool, sizeof(struct ea_list) + 2 * sizeof(eattr));
 
   l->next = NULL;
   l->flags = EALF_SORTED;
-  l->count = 1;
+  l->count = 2;
+
   l->attrs[0].id = EA_KRT_SOURCE;
   l->attrs[0].flags = 0;
   l->attrs[0].type = EAF_TYPE_INT | EAF_TEMP;
   l->attrs[0].u.data = rt->u.krt.proto;
 
+  l->attrs[1].id = EA_KRT_METRIC;
+  l->attrs[1].flags = 0;
+  l->attrs[1].type = EAF_TYPE_INT | EAF_TEMP;
+  l->attrs[1].u.data = rt->u.krt.metric;
+
   return l;
 }
 
+static void
+krt_store_tmp_attrs(struct rte *rt, struct ea_list *attrs)
+{
+  /* EA_KRT_SOURCE is read-only */
+  rt->u.krt.metric = ea_get_int(attrs, EA_KRT_METRIC, 0);
+}
+
+
 static struct proto *
 krt_init(struct proto_config *c)
 {
@@ -930,6 +944,7 @@ krt_init(struct proto_config *c)
 
   p->p.accept_ra_types = RA_OPTIMAL;
   p->p.make_tmp_attrs = krt_make_tmp_attrs;
+  p->p.store_tmp_attrs = krt_store_tmp_attrs;
   p->p.import_control = krt_import_control;
   p->p.rt_notify = krt_notify;
 
@@ -973,6 +988,10 @@ krt_get_attr(eattr * a, byte * buf, int buflen UNUSED)
     bsprintf(buf, "source");
     return GA_NAME;
 
+  case EA_KRT_METRIC:
+    bsprintf(buf, "metric");
+    return GA_NAME;
+
   case EA_KRT_PREFSRC:
     bsprintf(buf, "prefsrc");
     return GA_NAME;
diff --git a/sysdep/unix/krt.h b/sysdep/unix/krt.h
index aa1eccaa..d859c5b8 100644
--- a/sysdep/unix/krt.h
+++ b/sysdep/unix/krt.h
@@ -29,8 +29,9 @@ struct kif_proto;
 #define KRF_IGNORE 4			/* To be ignored */
 
 #define EA_KRT_SOURCE	EA_CODE(EAP_KRT, 0)
-#define EA_KRT_PREFSRC	EA_CODE(EAP_KRT, 1)
-#define EA_KRT_REALM	EA_CODE(EAP_KRT, 2)
+#define EA_KRT_METRIC	EA_CODE(EAP_KRT, 1)
+#define EA_KRT_PREFSRC	EA_CODE(EAP_KRT, 2)
+#define EA_KRT_REALM	EA_CODE(EAP_KRT, 3)
 
 /* Whenever we recognize our own routes, we allow learing of foreign routes */