netdev: Extend rx_recv to pass multiple packets.

[cascardo/ovs.git] / lib / dpif-netdev.h

diff --git a/lib/dpif-netdev.h b/lib/dpif-netdev.h
new file mode 100644 (file)
index 0000000..f844d84
--- /dev/null
+++ b/lib/dpif-netdev.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef DPIF_NETDEV_H
+#define DPIF_NETDEV_H 1
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include "openvswitch/types.h"
+#include "ofpbuf.h"
+#include "packets.h"
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+/* Enough headroom to add a vlan tag, plus an extra 2 bytes to allow IP
+ * headers to be aligned on a 4-byte boundary.  */
+enum { DP_NETDEV_HEADROOM = 2 + VLAN_HEADER_LEN };
+
+static inline void dp_packet_pad(struct ofpbuf *b)
+{
+    if (b->size < ETH_TOTAL_MIN) {
+        ofpbuf_put_zeros(b, ETH_TOTAL_MIN - b->size);
+    }
+}
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif /* netdev.h */