blob: 685ab430f7370dfb037fa118e35ef5a44615ef1f [file] [log] [blame]
/*
Copyright 2020 the original author or authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package ofagent
import (
"context"
"encoding/json"
"github.com/donNewtonAlpha/goloxi"
ofp "github.com/donNewtonAlpha/goloxi/of13"
"github.com/golang/protobuf/ptypes/empty"
"github.com/opencord/ofagent-go/internal/pkg/openflow"
"github.com/opencord/voltha-lib-go/v3/pkg/log"
"github.com/opencord/voltha-protos/v3/go/openflow_13"
"github.com/opencord/voltha-protos/v3/go/voltha"
"google.golang.org/grpc"
)
func (ofa *OFAgent) receivePacketsIn(ctx context.Context) {
logger.Debug("receive-packets-in-started")
// If we exit, assume disconnected
defer func() {
ofa.events <- ofaEventVolthaDisconnected
logger.Debug("receive-packets-in-finished")
}()
if ofa.volthaClient == nil {
logger.Error("no-voltha-connection")
return
}
opt := grpc.EmptyCallOption{}
streamCtx, streamDone := context.WithCancel(context.Background())
defer streamDone()
stream, err := ofa.volthaClient.Get().ReceivePacketsIn(streamCtx, &empty.Empty{}, opt)
if err != nil {
logger.Errorw("Unable to establish Receive PacketIn Stream",
log.Fields{"error": err})
return
}
top:
for {
select {
case <-ctx.Done():
break top
default:
pkt, err := stream.Recv()
if err != nil {
logger.Errorw("error receiving packet",
log.Fields{"error": err})
break top
}
ofa.packetInChannel <- pkt
}
}
}
func (ofa *OFAgent) handlePacketsIn(ctx context.Context) {
logger.Debug("handle-packets-in-started")
top:
for {
select {
case <-ctx.Done():
break top
case packet := <-ofa.packetInChannel:
packetIn := packet.GetPacketIn()
if logger.V(log.DebugLevel) {
js, _ := json.Marshal(packetIn)
logger.Debugw("packet-in recieved", log.Fields{"packet-in": js})
}
deviceID := packet.GetId()
ofPacketIn := ofp.NewPacketIn()
ofPacketIn.SetVersion(uint8(4))
ofPacketIn.SetXid(openflow.GetXid())
ofPacketIn.SetBufferId(packetIn.GetBufferId())
ofPacketIn.SetCookie(packetIn.GetCookie())
ofPacketIn.SetData(packetIn.GetData())
match := ofp.NewMatchV3()
inMatch := packetIn.GetMatch()
match.SetType(uint16(inMatch.GetType()))
//oxFields := inMatch.GetOxmFields()
var fields []goloxi.IOxm
size := uint16(4)
for _, oxmField := range inMatch.GetOxmFields() {
/*
for i := 0; i < len(oxFields); i++ {
oxmField := oxFields[i]
*/
field := oxmField.GetField()
ofbField := field.(*openflow_13.OfpOxmField_OfbField).OfbField
size += 4 //header for oxm
switch ofbField.Type {
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_IN_PORT:
ofpInPort := ofp.NewOxmInPort()
val := ofbField.GetValue().(*openflow_13.OfpOxmOfbField_Port)
ofpInPort.Value = ofp.Port(val.Port)
size += 4
fields = append(fields, ofpInPort)
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_ETH_TYPE:
ofpEthType := ofp.NewOxmEthType()
val := ofbField.GetValue().(*openflow_13.OfpOxmOfbField_EthType)
ofpEthType.Value = ofp.EthernetType(val.EthType)
size += 2
fields = append(fields, ofpEthType)
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_IN_PHY_PORT:
ofpInPhyPort := ofp.NewOxmInPhyPort()
val := ofbField.GetValue().(*openflow_13.OfpOxmOfbField_PhysicalPort)
ofpInPhyPort.Value = ofp.Port(val.PhysicalPort)
size += 4
fields = append(fields, ofpInPhyPort)
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_IP_PROTO:
ofpIpProto := ofp.NewOxmIpProto()
val := ofbField.GetValue().(*openflow_13.OfpOxmOfbField_IpProto)
ofpIpProto.Value = ofp.IpPrototype(val.IpProto)
size += 1
fields = append(fields, ofpIpProto)
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_UDP_SRC:
ofpUdpSrc := ofp.NewOxmUdpSrc()
val := ofbField.GetValue().(*openflow_13.OfpOxmOfbField_UdpSrc)
ofpUdpSrc.Value = uint16(val.UdpSrc)
size += 2
fields = append(fields, ofpUdpSrc)
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_UDP_DST:
ofpUdpDst := ofp.NewOxmUdpDst()
val := ofbField.GetValue().(*openflow_13.OfpOxmOfbField_UdpDst)
ofpUdpDst.Value = uint16(val.UdpDst)
size += 2
fields = append(fields, ofpUdpDst)
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_VLAN_VID:
ofpVlanVid := ofp.NewOxmVlanVid()
val := ofbField.GetValue()
if val != nil {
vlanId := val.(*openflow_13.OfpOxmOfbField_VlanVid)
ofpVlanVid.Value = uint16(vlanId.VlanVid) + 0x1000
size += 2
} else {
ofpVlanVid.Value = uint16(0)
}
fields = append(fields, ofpVlanVid)
default:
logger.Warnw("receive-packet-in:unhandled-oxm-field",
log.Fields{"field": ofbField.Type})
}
}
match.SetLength(size)
match.SetOxmList(fields)
ofPacketIn.SetMatch(*match)
ofPacketIn.SetReason(uint8(packetIn.GetReason()))
ofPacketIn.SetTableId(uint8(packetIn.GetTableId()))
ofPacketIn.SetTotalLen(uint16(len(ofPacketIn.GetData())))
ofc := ofa.getOFClient(deviceID)
if err := ofc.SendMessage(ofPacketIn); err != nil {
logger.Errorw("send-message-failed", log.Fields{
"device-id": deviceID,
"error": err})
}
}
}
logger.Debug("handle-packets-in-finished")
}