Changes between Version 57 and Version 58 of GEC16Agenda/OpenFlow/Instructions/Execute

Timestamp:

03/21/13 06:22:41 (11 years ago)

Author:

nriga@bbn.com

Comment:

--

GEC16Agenda/OpenFlow/Instructions/Execute

@@ -225 +225 @@
     If your controller is working you the packets registering in both terminals that you run tcpdump. 
 
+== Useful Tips for writing your controller ==
+In order to make this first experience of writing controller easier, we wrote some helpful functions that will abstract some of the  particularities of PoX away. 
+These functions are locates at `/local/pox/ext/utils.py`, so while you write your controller consult this file for details. 
+
+Functions that are implemented include:
+  * packetIsIP : Test if the packet is IP
+  * packetIsARP : Test if the packet is ARP
+  * packetIsRequestARP : Test if this is an ARP Request packet
+  * packetIsReplyARP : Test if this is an ARP Reply packet
+  * packetArpDstIp : Test what is the destination IP in an ARP packet
+  * packetArpSrcIp : Test what is the sources IP in an ARP packet
+  * packetIsTCP : Test if a packet is TCP
+  * packetDstIp : Test the destination IP of a packet
+  * packetSrcIp : Test the source IP of a packet
+  * packetDstTCPPort : Test the destination TCP port of a packet
+  * packetSrcTCPPort : Test the source TCP port of a packet
+  * createOFAction : Create one OpenFlow action
+  * getFullMatch : get the full match out of a packet
+  * createFlowMod : create a flow mod
+  * createArpRequest : Create an Arp Request for  a different destination IP
+  * createArpReply : Create an Arp Reply for  a different source IP
+
+
 == Run a port forward Controller ==
 Now let's do a slightly more complicated controller. OpenFlow gives you the power to overwrite fields of your packets at the switch, for example the TCP source or destination port and do port forwarding. You can have clients trying to contact a server at port 5000, and the OpenFlow switch can redirect your traffic to a service listening on port 6000.