Hello,
I’m new to Ryu controller, currently I’m trying to add a small function to the
simple_switch_l3.py in ryu app. Testbed I'm using is mininet + openvswitch +
openflow 1.3.
Function I want to implement is write a rule to modify the destination ip
address for matching packet(Match packet whose destination ip add is 10.0.4 and
rewrite that to 10.0.0.3). I'm trying to implement this based on existing
simple_switch_13.py code. But now I get a error which indicate the rules is
unable to write into the switch.
@set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
def switch_features_handler(self, ev):
datapath = ev.msg.datapath
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
match = parser.OFPMatch()
actions = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
ofproto.OFPCML_NO_BUFFER)]
self.add_flow(datapath, 0, match, actions)
#Here is what I add
match1 = parser.OFPMatch(ipv4_dst="10.0.0.5")
action1 = [parser.OFPActionSetField(ipv4_dst="10.0.0.3")]
self.add_flow(datapath, 2, match1, action1)
def add_flow(self, datapath, priority, match, actions):
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
inst = [parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions)]
mod = parser.OFPFlowMod(datapath=datapath, priority=priority,
match=match, instructions=inst)
datapath.send_msg(mod)
After I run this code I get
error msg ev version: 0x4 msg_type 0x1 xid 0x9168c30a
OFPErrorMsg(code=9,data='\x04\x0e\x00X\x91h\xc3\n\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x0c\x80\x00\x18\x04\n\x00\x00\x05\x00\x00\x00\x00',type=4)
type 0x4 code 0x9 0x4 0xe 0x0 0x58 0x91 0x68 0xc3 0xa 0x0 0x0 0x0 0x0 0x0 0x0
0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x1 0xff
0xff 0xff 0xff 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x1 0x0 0xc
0x80 0x0 0x18 0x4 0xa 0x0 0x0 0x5 0x0 0x0 0x0 0x0
Anyone could tell me how can I correctly write this rule to openvswitch in Ryu?
Thank you very much!
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