ofproto: Add support for barrier command (OpenFlow 0.9)

[sliver-openvswitch.git] / ofproto / ofproto.c

diff --git a/ofproto/ofproto.c b/ofproto/ofproto.c
index f80439c..b6b13a1 100644 (file)
--- a/ofproto/ofproto.c
+++ b/ofproto/ofproto.c
@@ -3013,6 +3013,19 @@ handle_vendor(struct ofproto *p, struct ofconn *ofconn, void *msg)
     return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_SUBTYPE);
 }
 
+static int
+handle_barrier_request(struct ofconn *ofconn, struct ofp_header *oh)
+{
+    struct ofp_header *ob;
+    struct ofpbuf *buf;
+
+    /* Currently, everything executes synchronously, so we can just
+     * immediately send the barrier reply. */
+    ob = make_openflow_xid(sizeof *ob, OFPT_BARRIER_REPLY, oh->xid, &buf);
+    queue_tx(buf, ofconn, ofconn->reply_counter);
+    return 0;
+}
+
 static void
 handle_openflow(struct ofconn *ofconn, struct ofproto *p,
                 struct ofpbuf *ofp_msg)
@@ -3062,6 +3075,10 @@ handle_openflow(struct ofconn *ofconn, struct ofproto *p,
         error = handle_vendor(p, ofconn, ofp_msg->data);
         break;
 
+    case OFPT_BARRIER_REQUEST:
+        error = handle_barrier_request(ofconn, oh);
+        break;
+
     default:
         if (VLOG_IS_WARN_ENABLED()) {
             char *s = ofp_to_string(oh, ntohs(oh->length), 2);