openflow: Add enum ofp_version

Use an enum for ofp_version in ofp-util and ofp-msg.
This in conjunction with the use of switch() statements
allows the compiler to warn when a new ofp_version isn't handled.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Ben Pfaff <blp@nicira.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/vconn.c b/lib/vconn.c
index 8f4052cc..caa1bccf 100644
--- a/lib/vconn.c
+++ b/lib/vconn.c
@@ -278,7 +278,8 @@ vconn_run_wait(struct vconn *vconn)
 }
 
 int
-vconn_open_block(const char *name, int min_version, struct vconn **vconnp)
+vconn_open_block(const char *name, enum ofp_version min_version,
+                 struct vconn **vconnp)
 {
     struct vconn *vconn;
     int error;
@@ -361,7 +362,7 @@ vconn_get_local_port(const struct vconn *vconn)
  *
  * A vconn that has successfully connected (that is, vconn_connect() or
  * vconn_send() or vconn_recv() has returned 0) always negotiated a version. */
-int
+enum ofp_version
 vconn_get_version(const struct vconn *vconn)
 {
     return vconn->version;