| /* |
| * Copyright 2018-present Open Networking Foundation |
| * 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 igmp |
| |
| import ( |
| "encoding/binary" |
| "github.com/google/gopacket" |
| "github.com/google/gopacket/layers" |
| bbsim "github.com/opencord/bbsim/internal/bbsim/types" |
| omci "github.com/opencord/omci-sim" |
| "github.com/opencord/voltha-protos/v2/go/openolt" |
| log "github.com/sirupsen/logrus" |
| "net" |
| "time" |
| ) |
| |
| func SendIGMPLeaveGroupV2(ponPortId uint32, onuId uint32, serialNumber string, portNo uint32, macAddress net.HardwareAddr, stream bbsim.Stream) error { |
| log.WithFields(log.Fields{ |
| "OnuId": onuId, |
| "SerialNumber": serialNumber, |
| "PortNo": portNo, |
| }).Debugf("Entered SendIGMPLeaveGroupV2") |
| igmp := createIGMPV2LeaveRequestPacket() |
| pkt, err := serializeIgmpPacket(ponPortId, onuId, macAddress, igmp) |
| |
| if err != nil { |
| log.WithFields(log.Fields{ |
| "OnuId": onuId, |
| "IntfId": ponPortId, |
| "SerialNumber": serialNumber, |
| }).Errorf("Seriliazation of igmp packet failed : %s", err) |
| return err |
| } |
| |
| gemid, err := omci.GetGemPortId(ponPortId, onuId) |
| if err != nil { |
| log.WithFields(log.Fields{ |
| "OnuId": onuId, |
| "IntfId": ponPortId, |
| "SerialNumber": serialNumber, |
| }).Errorf("Can't retrieve GemPortId for IGMP: %s", err) |
| return err |
| } |
| |
| data := &openolt.Indication_PktInd{ |
| PktInd: &openolt.PacketIndication{ |
| IntfType: "pon", |
| IntfId: ponPortId, |
| GemportId: uint32(gemid), |
| Pkt: pkt, |
| PortNo: portNo, |
| }, |
| } |
| //Sending IGMP packets |
| if err := stream.Send(&openolt.Indication{Data: data}); err != nil { |
| log.Errorf("Fail to send IGMP PktInd indication for ONU: %s, IntfId: %s, SerialNumber: %s, error: %v", onuId, ponPortId, serialNumber, err) |
| return err |
| } |
| return nil |
| } |
| |
| func SendIGMPMembershipReportV2(ponPortId uint32, onuId uint32, serialNumber string, portNo uint32, macAddress net.HardwareAddr, stream bbsim.Stream) error { |
| log.WithFields(log.Fields{ |
| "OnuId": onuId, |
| "SerialNumber": serialNumber, |
| "PortNo": portNo, |
| }).Debugf("Entered SendIGMPMembershipReportV2") |
| igmp := createIGMPV2MembershipReportPacket() |
| pkt, err := serializeIgmpPacket(ponPortId, onuId, macAddress, igmp) |
| |
| if err != nil { |
| log.WithFields(log.Fields{ |
| "OnuId": onuId, |
| "IntfId": ponPortId, |
| "SerialNumber": serialNumber, |
| }).Errorf("Seriliazation of igmp packet failed : %s", err) |
| return err |
| } |
| |
| gemid, err := omci.GetGemPortId(ponPortId, onuId) |
| if err != nil { |
| log.WithFields(log.Fields{ |
| "OnuId": onuId, |
| "IntfId": ponPortId, |
| "SerialNumber": serialNumber, |
| }).Errorf("Can't retrieve GemPortId for IGMP: %s", err) |
| return err |
| } |
| |
| data := &openolt.Indication_PktInd{ |
| PktInd: &openolt.PacketIndication{ |
| IntfType: "pon", |
| IntfId: ponPortId, |
| GemportId: uint32(gemid), |
| Pkt: pkt, |
| PortNo: portNo, |
| }, |
| } |
| //Sending IGMP packets |
| if err := stream.Send(&openolt.Indication{Data: data}); err != nil { |
| log.Errorf("Fail to send IGMP PktInd indication for ONU: %s, IntfId: %s, SerialNumber: %s, error: %v", onuId, ponPortId, serialNumber, err) |
| return err |
| } |
| return nil |
| } |
| |
| //func serializeIgmpPacket(intfId uint32, onuId uint32, srcMac net.HardwareAddr, igmp *layers.IGMP) ([]byte, error) { |
| func createIGMPV2MembershipReportPacket() IGMP { |
| return IGMP{ |
| Type: 0x16, //IGMPV2 Membership Report |
| MaxResponseTime: time.Duration(1), |
| Checksum: 0, |
| GroupAddress: net.IPv4(224, 0, 0, 22), |
| Version: 2, |
| } |
| } |
| |
| func createIGMPV2LeaveRequestPacket() IGMP { |
| return IGMP{ |
| Type: 0x17, //IGMPV2 Leave Group |
| MaxResponseTime: time.Duration(1), |
| Checksum: 0, |
| GroupAddress: net.IPv4(224, 0, 0, 22), |
| Version: 2, |
| } |
| } |
| |
| func serializeIgmpPacket(intfId uint32, onuId uint32, srcMac net.HardwareAddr, igmp IGMP) ([]byte, error) { |
| buffer := gopacket.NewSerializeBuffer() |
| options := gopacket.SerializeOptions{ |
| ComputeChecksums: true, |
| FixLengths: true, |
| } |
| |
| ethernetLayer := &layers.Ethernet{ |
| SrcMAC: srcMac, |
| DstMAC: net.HardwareAddr{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, |
| EthernetType: layers.EthernetTypeIPv4, |
| } |
| |
| ipLayer := &layers.IPv4{ |
| Version: 4, |
| TOS: 0x10, |
| Id: 0, |
| TTL: 128, |
| SrcIP: []byte{0, 0, 0, 0}, |
| DstIP: []byte{224, 0, 0, 22}, |
| Protocol: layers.IPProtocolIGMP, |
| Options: []layers.IPv4Option{{OptionType: 148, OptionLength: 4, OptionData: make([]byte, 0)}}, //Adding router alert option |
| } |
| |
| if err := gopacket.SerializeLayers(buffer, options, ethernetLayer, ipLayer, igmp); err != nil { |
| return nil, err |
| } |
| |
| return buffer.Bytes(), nil |
| } |
| |
| //-----------------------------------------***********************--------------------------------- |
| // BaseLayer is a convenience struct which implements the LayerData and |
| // LayerPayload functions of the Layer interface. |
| type BaseLayer struct { |
| // Contents is the set of bytes that make up this layer. IE: for an |
| // Ethernet packet, this would be the set of bytes making up the |
| // Ethernet frame. |
| Contents []byte |
| // Payload is the set of bytes contained by (but not part of) this |
| // Layer. Again, to take Ethernet as an example, this would be the |
| // set of bytes encapsulated by the Ethernet protocol. |
| Payload []byte |
| } |
| |
| type IGMPType uint8 |
| |
| type IGMP struct { |
| BaseLayer |
| Type IGMPType |
| MaxResponseTime time.Duration |
| Checksum uint16 |
| GroupAddress net.IP |
| SupressRouterProcessing bool |
| RobustnessValue uint8 |
| IntervalTime time.Duration |
| SourceAddresses []net.IP |
| NumberOfGroupRecords uint16 |
| NumberOfSources uint16 |
| Version uint8 // IGMP protocol version |
| } |
| |
| // SerializeTo writes the serialized form of this layer into the |
| // SerializationBuffer, implementing gopacket.SerializableLayer. |
| // See the docs for gopacket.SerializableLayer for more info. |
| // SerializeTo writes the serialized form of this layer into the |
| // SerializationBuffer, implementing gopacket.SerializableLayer. |
| // See the docs for gopacket.SerializableLayer for more info. |
| func (igmp IGMP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { |
| // func (igmp *IGMP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { |
| log.Debugf("Serializing IGMP Packet") |
| //TODO - add length check here |
| data, err := b.PrependBytes(8915) |
| if err != nil { |
| return err |
| } |
| |
| data[0] = byte(igmp.Type) |
| data[1] = byte(igmp.MaxResponseTime) |
| data[2] = 0 |
| data[3] = 0 |
| copy(data[4:8], igmp.GroupAddress.To4()) |
| if opts.ComputeChecksums { |
| igmp.Checksum = tcpipChecksum(data, 0) |
| binary.BigEndian.PutUint16(data[2:4], igmp.Checksum) |
| } |
| return nil |
| } |
| |
| // Calculate the TCP/IP checksum defined in rfc1071. The passed-in csum is any |
| // initial checksum data that's already been computed. |
| func tcpipChecksum(data []byte, csum uint32) uint16 { |
| // to handle odd lengths, we loop to length - 1, incrementing by 2, then |
| // handle the last byte specifically by checking against the original |
| // length. |
| length := len(data) - 1 |
| for i := 0; i < length; i += 2 { |
| // For our test packet, doing this manually is about 25% faster |
| // (740 ns vs. 1000ns) than doing it by calling binary.BigEndian.Uint16. |
| csum += uint32(data[i]) << 8 |
| csum += uint32(data[i+1]) |
| } |
| if len(data)%2 == 1 { |
| csum += uint32(data[length]) << 8 |
| } |
| for csum > 0xffff { |
| csum = (csum >> 16) + (csum & 0xffff) |
| } |
| return ^uint16(csum) |
| } |
| |
| func (IGMP) LayerType() gopacket.LayerType { return layers.LayerTypeIGMP } |