From: Ben Gamsa <ben@somanetworks.com>
Date: Thu, 8 May 2008 15:42:09 +0000 (-0400)
Subject: Added two new functions to facilitate processing the nexthop entries for routes.
X-Git-Tag: libnl2_0~105
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=cc9c6d63848400b77906a4a9df0be826dfc21b72;p=libnl

Added two new functions to facilitate processing the nexthop entries for routes.

Added rtnl_route_foreach_nexthop() to walk the list of nexthops invoking a
caller-provided callback for each nexthop entry, and added rtnl_route_nexthop_n()
to retrieve the Nth nexthop entry in the list.
---

diff --git a/include/netlink/route/route.h b/include/netlink/route/route.h
index b7bf155..071f2c5 100644
--- a/include/netlink/route/route.h
+++ b/include/netlink/route/route.h
@@ -102,6 +102,12 @@ extern void		rtnl_route_remove_nexthop(struct rtnl_route *,
 extern struct nl_list_head *	rtnl_route_get_nexthops(struct rtnl_route *);
 extern int		rtnl_route_get_nnexthops(struct rtnl_route *);
 
+extern void		rtnl_route_foreach_nexthop(struct rtnl_route *r,
+                                 void (*cb)(struct rtnl_nexthop *, void *),
+                                 void *arg);
+
+extern struct rtnl_nexthop * rtnl_route_nexthop_n(struct rtnl_route *r, int n);
+
 extern int		rtnl_route_guess_scope(struct rtnl_route *);
 
 extern char *		rtnl_route_table2str(int, char *, size_t);
diff --git a/lib/route/route_obj.c b/lib/route/route_obj.c
index 9b92214..200f561 100644
--- a/lib/route/route_obj.c
+++ b/lib/route/route_obj.c
@@ -763,6 +763,34 @@ int rtnl_route_get_nnexthops(struct rtnl_route *route)
 	return route->rt_nr_nh;
 }
 
+void rtnl_route_foreach_nexthop(struct rtnl_route *r,
+                                void (*cb)(struct rtnl_nexthop *, void *),
+                                void *arg)
+{
+	struct rtnl_nexthop *nh;
+    
+	if (r->ce_mask & ROUTE_ATTR_MULTIPATH) {
+		nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) {
+                        cb(nh, arg);
+		}
+	}
+}
+
+struct rtnl_nexthop *rtnl_route_nexthop_n(struct rtnl_route *r, int n)
+{
+	struct rtnl_nexthop *nh;
+	int i;
+    
+	if (r->ce_mask & ROUTE_ATTR_MULTIPATH && r->rt_nr_nh > n) {
+		i = 0;
+		nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) {
+                        if (i == n) return nh;
+			i++;
+		}
+	}
+        return NULL;
+}
+
 /** @} */
 
 /**