Created a packet service which presents a global-context API to
applications for packet events.

The API will provide both packet-ins and packet-outs. Packet-ins have been
implemented, packet-outs are left for a future commit.

Change-Id: Ia1666412ebc68912c6c84e43a7cbc327fcd0e8f8
diff --git a/src/main/java/net/onrc/onos/api/packet/IPacketListener.java b/src/main/java/net/onrc/onos/api/packet/IPacketListener.java
new file mode 100644
index 0000000..000ed7a
--- /dev/null
+++ b/src/main/java/net/onrc/onos/api/packet/IPacketListener.java
@@ -0,0 +1,9 @@
+package net.onrc.onos.api.packet;
+
+import net.onrc.onos.core.packet.Ethernet;
+import net.onrc.onos.core.topology.Port;
+import net.onrc.onos.core.topology.Switch;
+
+public interface IPacketListener {
+    public void receive(Switch sw, Port inPort, Ethernet payload);
+}