New function netdev_enumerate().

[sliver-openvswitch.git] / lib / netdev.c

diff --git a/lib/netdev.c b/lib/netdev.c
index e83c647..9a91e2f 100644 (file)
--- a/lib/netdev.c
+++ b/lib/netdev.c
@@ -65,6 +65,7 @@
 #include "packets.h"
 #include "poll-loop.h"
 #include "socket-util.h"
+#include "svec.h"
 
 #define THIS_MODULE VLM_netdev
 #include "vlog.h"
@@ -948,6 +949,27 @@ netdev_arp_lookup(const struct netdev *netdev,
     }
     return retval;
 }
+
+/* Initializes 'svec' with a list of the names of all known network devices. */
+void
+netdev_enumerate(struct svec *svec)
+{
+    struct if_nameindex *names;
+
+    svec_init(svec);
+    names = if_nameindex();
+    if (names) {
+        size_t i;
+
+        for (i = 0; names[i].if_name != NULL; i++) {
+            svec_add(svec, names[i].if_name);
+        }
+        if_freenameindex(names);
+    } else {
+        VLOG_WARN("could not obtain list of network device names: %s",
+                  strerror(errno));
+    }
+}
 \f
 static void restore_all_flags(void *aux);