netsniff-ng: Rename proto_vlan.h to vlan.h

The proto_ prefix is reserved for dissectors and the header contains
helper functions not exclusive to the proto_vlan dissector, so give it a
more generic name.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 22 insertions, 0 deletions

diff --git a/vlan.h b/vlan.h
new file mode 100644
index 0000000..b58d1a2
--- /dev/null
+++ b/vlan.h
@@ -0,0 +1,22 @@
+#ifndef VLAN_H
+#define VLAN_H
+
+#include <stdbool.h>
+#include <inttypes.h>
+
+static inline uint16_t vlan_tci2prio(uint16_t tci)
+{
+	return (tci & 0xe000) >> 13;
+}
+
+static inline uint16_t vlan_tci2cfi(uint16_t tci)
+{
+	return (tci & 0x1000) >> 12;
+}
+
+static inline uint16_t vlan_tci2vid(uint16_t tci)
+{
+	return tci & 0x0fff;
+}
+
+#endif