Changes between Version 2 and Version 3 of Internal/OpenFlow/miscOF

Timestamp:

Apr 8, 2013, 9:53:46 PM (11 years ago)

Author:

akoshibe

Comment:

—

Internal/OpenFlow/miscOF

@@ -11 +11 @@
  * A good way to track packets and transactions between datapath and controller is via buffer Id for switch-initiated conversations, and by XID for controller-initiated transactions. A caveat is that the buffer ID is only applicable to a subset of messages e.g. !PacketIns and !PacketOuts. A -1 buffer ID indicates a controller-generated packet (e.g. by a flow pushing tool or via a REST API for static flows).  
 
- * making !FlowMods. If not building a match object from a !PacketIn, make sure to not forget to invert the wildcard bit for the field you are setting. The default match is wildcarded to all. 
+ * making !FlowMods. If not building a match object from a !PacketIn, make sure to not forget to invert the wildcard bit for the field you are setting. The default match is wildcarded to all. For example, to make a match object that only inspects source MAC address of an Ethernet header:
+   {{{
+    (1)    OFMatch m1 = new OFMatch();
+    (2)    m1.setDataLayerSource(hwaddr);
+           m1.setWildcards(OFMatch.OFPFW_ALL & ~OFMatch.OFPFW_DL_SRC);
+
+    (3)    flowmod.setmatch(m1);   //and other params as necessary
+   }}}
+    
+