private void InstallFlow(IConnection connection)
{
_controller.Topo.AddSwitch(connection.SwitchFeatures, connection);
_controller.LogDebug($"[{connection.Mac}] Installing Discovery Flow");
OfpMatch match = new OfpMatch
{
Wildcards = new OfpWildcards()
{
Wildcards = OfpFlowWildcards.OFPFW_DL_TYPE | OfpFlowWildcards.OFPFW_DL_DST
},
DlType = (ushort)EthernetPacketType.LLDP,
DlDst = EthernetAddress.NDP_MULTICAST.GetAddressBytes()
};
OfpFlowMod flow = new OfpFlowMod
{
Priority = _flowPriority,
Match = match
};
flow.Actions[OfpActionType.OFPAT_OUTPUT] = new OfpActionOutput()
{
Port = (ushort)OfpPort.OFPP_CONTROLLER
};
connection.Write(flow.ToByteArray());
//Console.WriteLine($"[{connection.Mac}]Sending LLDP");
foreach (var port in connection.SwitchFeatures.Ports)
{
_handler.SendLldpPacket(connection, port);
}
}
private void SendFlowMod(IConnection connection, Link link, PhysicalAddress src, PhysicalAddress dst, ushort priority = _flowPriority)
{
OfpMatch match = new OfpMatch
{
//Wildcards = new OfpWildcards() { Wildcards = 0 },
Wildcards = new OfpWildcards()
{
Wildcards = ~(OfpFlowWildcards.OFPFW_DL_DST | OfpFlowWildcards.OFPFW_DL_SRC), NwDstMask = 63, NwSrcMask = 63
},
DlSrc = src.GetAddressBytes(),
DlDst = dst.GetAddressBytes()
};
OfpFlowMod flow = new OfpFlowMod
{
Priority = priority,
Match = match
};
flow.Actions[OfpActionType.OFPAT_OUTPUT] = new OfpActionOutput()
{
Port = link.SrcPort
};
_controller.LogDebug($"[{connection.Mac}]FlowMod from [{src}] to [{dst}]");
connection.Write(flow.ToByteArray());
}
public void TestOfpFlowMod()
{
OfpFlowMod dst;
//A flow entry to redirect all packets which dst-port is 3306(mysql) to dst-port 1433(sqlserver)
OfpFlowMod src = new OfpFlowMod()
{
Command = OfpFlowModCommand.OFPFC_ADD,
Match = new OfpMatch()
{
Wildcards = new OfpWildcards()
{
Wildcards = ~OfpFlowWildcards.OFPFW_TP_SRC
},
TpDst = 3306,
},
Actions = new ActionList()
{
{ OfpActionType.OFPAT_SET_TP_DST, new OfpActionTpPort(true)
{
TpPort = 1433
} },
{ OfpActionType.OFPAT_OUTPUT, new OfpActionOutput()
{
Port = (ushort)OfpPort.OFPP_ALL
} }
}
};
using (MemoryStream ms = new MemoryStream(src.ToByteArray()))
{
dst = new OfpFlowMod(ms);
}
Assert.AreEqual(src.Match.Wildcards, dst.Match.Wildcards);
Assert.AreEqual(src.Match.TpDst, dst.Match.TpDst);
Assert.IsTrue(((OfpActionOutput)dst.Actions[OfpActionType.OFPAT_OUTPUT]).Port == (ushort)OfpPort.OFPP_ALL);
Assert.IsTrue(((OfpActionTpPort)dst.Actions[OfpActionType.OFPAT_SET_TP_DST]).TpPort == 1433);
}
private void SendFlowMod(Topology.Switch sw, Link link, IPAddress src, IPAddress dst, ushort priority = _flowPriority)
{
OfpMatch match = new OfpMatch
{
Wildcards = new OfpWildcards()
{
NwDstMask = 0, NwSrcMask = 0
},
NwSrc = (uint)src.Address,
NwDst = (uint)dst.Address,
};
OfpFlowMod flow = new OfpFlowMod
{
Priority = priority,
Match = match
};
flow.Actions[OfpActionType.OFPAT_OUTPUT] = new OfpActionOutput()
{
Port = link.SrcPort
};
_controller.LogDebug($"[{sw.MacAddress}]FlowMod from [{src}] to [{dst}]");
sw.Connection.Write(flow.ToByteArray());
}
