[ovs-dev] [PATCH 2/3] netdev: New functions for interpreting "enum ofp_port_features" bitmaps.

[Ben Pfaff]

---
 lib/netdev.c |   30 ++++++++++++++++++++++++++++++
 lib/netdev.h |    2 ++
 2 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/lib/netdev.c b/lib/netdev.c
index fb0f98e..d14b909 100644
--- a/lib/netdev.c
+++ b/lib/netdev.c
@@ -31,6 +31,7 @@
 #include "list.h"
 #include "netdev-provider.h"
 #include "ofpbuf.h"
+#include "openflow/openflow.h"
 #include "packets.h"
 #include "poll-loop.h"
 #include "shash.h"
@@ -525,6 +526,35 @@ netdev_get_features(struct netdev *netdev,
     return error;
 }
 
+/* Returns the maximum speed of a network connection that has the "enum
+ * ofp_port_features" bits in 'features', in bits per second.  If no bits that
+ * indicate a speed are set in 'features', assumes 100Mbps. */
+uint64_t
+netdev_features_to_bps(uint32_t features)
+{
+    enum {
+        F_10000MB = OFPPF_10GB_FD,
+        F_1000MB = OFPPF_1GB_HD | OFPPF_1GB_FD,
+        F_100MB = OFPPF_100MB_HD | OFPPF_100MB_FD,
+        F_10MB = OFPPF_10MB_HD | OFPPF_10MB_FD
+    };
+
+    return (  features & F_10000MB  ? UINT64_C(10000000000)
+            : features & F_1000MB   ? UINT64_C(1000000000)
+            : features & F_100MB    ? UINT64_C(100000000)
+            : features & F_10MB     ? UINT64_C(10000000)
+                                    : UINT64_C(100000000));
+}
+
+/* Returns true if any of the "enum ofp_port_features" bits that indicate a
+ * full-duplex link are set in 'features', otherwise false. */
+bool
+netdev_features_is_full_duplex(uint32_t features)
+{
+    return (features & (OFPPF_10MB_FD | OFPPF_100MB_FD | OFPPF_1GB_FD
+                        | OFPPF_10GB_FD)) != 0;
+}
+
 /* Set the features advertised by 'netdev' to 'advertise'.  Returns 0 if
  * successful, otherwise a positive errno value. */
 int
diff --git a/lib/netdev.h b/lib/netdev.h
index b8c7dfb..8060ddb 100644
--- a/lib/netdev.h
+++ b/lib/netdev.h
@@ -112,6 +112,8 @@ int netdev_get_carrier(const struct netdev *, bool *carrier);
 int netdev_get_features(struct netdev *,
                         uint32_t *current, uint32_t *advertised,
                         uint32_t *supported, uint32_t *peer);
+uint64_t netdev_features_to_bps(uint32_t features);
+bool netdev_features_is_full_duplex(uint32_t features);
 int netdev_set_advertisements(struct netdev *, uint32_t advertise);
 
 int netdev_get_in4(const struct netdev *, struct in_addr *address,
-- 
1.6.3.3